[FFmpeg-devel,v5,02/10] avcodec: add cbs for H266/VVC

From: Nuo Mi <nuomi2021@gmail.com>

Add CodedBitstreamContext to parse VPS,SPS,PPS in VVC nal units.
Implement parsing and writing of SPS,PPS,VPS,PH,AUD,SEI and slices.
Add ff_cbs_type_h266 to cbs types tables and AV_CODEC_ID_H266
to cbs codec ids.

Co-authored-by: Thomas Siedel <thomas.ff@spin-digital.com>
---
 configure                             |    2 +
 libavcodec/cbs.c                      |    6 +
 libavcodec/cbs_h2645.c                |  373 ++-
 libavcodec/cbs_h266.h                 |  791 +++++++
 libavcodec/cbs_h266_syntax_template.c | 3096 +++++++++++++++++++++++++
 libavcodec/cbs_internal.h             |    1 +
 libavcodec/cbs_sei.c                  |   29 +
 7 files changed, 4296 insertions(+), 2 deletions(-)
 create mode 100644 libavcodec/cbs_h266.h
 create mode 100644 libavcodec/cbs_h266_syntax_template.c

> On Jan 3, 2023, at 21:40, Thomas Siedel <thomas.ff@spin-digital.com> wrote:
> 
> From: Nuo Mi <nuomi2021@gmail.com>
> 
> Add CodedBitstreamContext to parse VPS,SPS,PPS in VVC nal units.
> Implement parsing and writing of SPS,PPS,VPS,PH,AUD,SEI and slices.
> Add ff_cbs_type_h266 to cbs types tables and AV_CODEC_ID_H266
> to cbs codec ids.
> 
> Co-authored-by: Thomas Siedel <thomas.ff@spin-digital.com>
> ---
> configure                             |    2 +
> libavcodec/cbs.c                      |    6 +
> libavcodec/cbs_h2645.c                |  373 ++-
> libavcodec/cbs_h266.h                 |  791 +++++++
> libavcodec/cbs_h266_syntax_template.c | 3096 +++++++++++++++++++++++++
> libavcodec/cbs_internal.h             |    1 +
> libavcodec/cbs_sei.c                  |   29 +
> 7 files changed, 4296 insertions(+), 2 deletions(-)
> create mode 100644 libavcodec/cbs_h266.h
> create mode 100644 libavcodec/cbs_h266_syntax_template.c
> 
> diff --git a/configure b/configure
> index 870d426b0e..3cb2936901 100755
> --- a/configure
> +++ b/configure
> @@ -2427,6 +2427,7 @@ CONFIG_EXTRA="
>     cbs_av1
>     cbs_h264
>     cbs_h265
> +    cbs_h266
>     cbs_jpeg
>     cbs_mpeg2
>     cbs_vp9
> @@ -2709,6 +2710,7 @@ threads_if_any="$THREADS_LIST"
> cbs_av1_select="cbs"
> cbs_h264_select="cbs"
> cbs_h265_select="cbs"
> +cbs_h266_select="cbs"
> cbs_jpeg_select="cbs"
> cbs_mpeg2_select="cbs"
> cbs_vp9_select="cbs"
> diff --git a/libavcodec/cbs.c b/libavcodec/cbs.c
> index 504197e06d..dc9cec443b 100644
> --- a/libavcodec/cbs.c
> +++ b/libavcodec/cbs.c
> @@ -40,6 +40,9 @@ static const CodedBitstreamType *const cbs_type_table[] = {
> #if CONFIG_CBS_H265
>     &ff_cbs_type_h265,
> #endif
> +#if CONFIG_CBS_H266
> +    &ff_cbs_type_h266,
> +#endif
> #if CONFIG_CBS_JPEG
>     &ff_cbs_type_jpeg,
> #endif
> @@ -61,6 +64,9 @@ const enum AVCodecID ff_cbs_all_codec_ids[] = {
> #if CONFIG_CBS_H265
>     AV_CODEC_ID_H265,
> #endif
> +#if CONFIG_CBS_H266
> +    AV_CODEC_ID_H266,
> +#endif
> #if CONFIG_CBS_JPEG
>     AV_CODEC_ID_MJPEG,
> #endif
> diff --git a/libavcodec/cbs_h2645.c b/libavcodec/cbs_h2645.c
> index 4ee06003c3..8ae8ae6cda 100644
> --- a/libavcodec/cbs_h2645.c
> +++ b/libavcodec/cbs_h2645.c
> @@ -24,10 +24,16 @@
> #include "cbs_internal.h"
> #include "cbs_h264.h"
> #include "cbs_h265.h"
> +#include "cbs_h266.h"
> #include "h264.h"
> #include "h2645_parse.h"
> #include "hevc.h"
> +#include "vvc.h"
> 
> +static av_always_inline unsigned int h266_ceil(unsigned int v, unsigned int align)
> +{
> +    return (((v) + (align) - 1) / (align));
> +}

Does AV_CEIL_RSHIFT() work for the usecase?

> 
> static int cbs_read_ue_golomb(CodedBitstreamContext *ctx, GetBitContext *gbc,
>                               const char *name, const int *subscripts,
> @@ -255,6 +261,7 @@ static int cbs_h265_payload_extension_present(GetBitContext *gbc, uint32_t paylo
> #define FUNC_NAME1(rw, codec, name) FUNC_NAME2(rw, codec, name)
> #define FUNC_H264(name) FUNC_NAME1(READWRITE, h264, name)
> #define FUNC_H265(name) FUNC_NAME1(READWRITE, h265, name)
> +#define FUNC_H266(name) FUNC_NAME1(READWRITE, h266, name)
> #define FUNC_SEI(name)  FUNC_NAME1(READWRITE, sei,  name)
> 
> #define SUBSCRIPTS(subs, ...) (subs > 0 ? ((int[subs + 1]){ subs, __VA_ARGS__ }) : NULL)
> @@ -369,6 +376,10 @@ static int cbs_h2645_read_more_rbsp_data(GetBitContext *gbc)
> #include "cbs_h265_syntax_template.c"
> #undef FUNC
> 
> +#define FUNC(name) FUNC_H266(name)
> +#include "cbs_h266_syntax_template.c"
> +#undef FUNC
> +
> #undef READ
> #undef READWRITE
> #undef RWContext
> @@ -447,6 +458,10 @@ static int cbs_h2645_read_more_rbsp_data(GetBitContext *gbc)
> #include "cbs_h265_syntax_template.c"
> #undef FUNC
> 
> +#define FUNC(name) FUNC_H266(name)
> +#include "cbs_h266_syntax_template.c"
> +#undef FUNC
> +
> #undef WRITE
> #undef READWRITE
> #undef RWContext
> @@ -476,8 +491,9 @@ static int cbs_h2645_fragment_add_nals(CodedBitstreamContext *ctx,
>         const H2645NAL *nal = &packet->nals[i];
>         AVBufferRef *ref;
>         size_t size = nal->size;
> +        enum AVCodecID codec_id = ctx->codec->codec_id;
> 
> -        if (nal->nuh_layer_id > 0)
> +        if (codec_id != AV_CODEC_ID_VVC && nal->nuh_layer_id > 0)
>             continue;
> 
>         // Remove trailing zeroes.
> @@ -513,6 +529,12 @@ static int cbs_h2645_split_fragment(CodedBitstreamContext *ctx,
>     if (frag->data_size == 0)
>         return 0;
> 
> +    if (codec_id == AV_CODEC_ID_VVC) {
> +        //we deactive picture header here to avoid reuse previous au's ph.
> +        CodedBitstreamH266Context *h266 = ctx->priv_data;
> +        h266->priv.ph = NULL;
> +    }
> +
>     if (header && frag->data[0] && codec_id == AV_CODEC_ID_H264) {
>         // AVCC header.
>         size_t size, start, end;
> @@ -685,6 +707,26 @@ cbs_h2645_replace_ps(4, PPS, pps, pic_parameter_set_id)
> cbs_h2645_replace_ps(5, VPS, vps, vps_video_parameter_set_id)
> cbs_h2645_replace_ps(5, SPS, sps, sps_seq_parameter_set_id)
> cbs_h2645_replace_ps(5, PPS, pps, pps_pic_parameter_set_id)
> +cbs_h2645_replace_ps(6, VPS, vps, vps_video_parameter_set_id)
> +cbs_h2645_replace_ps(6, SPS, sps, sps_seq_parameter_set_id)
> +cbs_h2645_replace_ps(6, PPS, pps, pps_pic_parameter_set_id)
> +
> +static int cbs_h266_replace_ph(CodedBitstreamContext *ctx,
> +                               CodedBitstreamUnit *unit)
> +{
> +    CodedBitstreamH266Context *h266 = ctx->priv_data;
> +    int err;
> +
> +    h266->priv.ph = NULL;
> +    err = ff_cbs_make_unit_refcounted(ctx, unit);
> +    if (err < 0)
> +        return err;
> +    err = av_buffer_replace(&h266->priv.ph_ref, unit->content_ref);
> +    if (err < 0)
> +        return err;
> +    h266->priv.ph = (H266RawPH*)h266->priv.ph_ref->data;
> +    return 0;
> +}
> 
> static int cbs_h264_read_nal_unit(CodedBitstreamContext *ctx,
>                                   CodedBitstreamUnit *unit)
> @@ -926,6 +968,130 @@ static int cbs_h265_read_nal_unit(CodedBitstreamContext *ctx,
>     return 0;
> }
> 
> +static int cbs_h266_read_nal_unit(CodedBitstreamContext *ctx,
> +                                  CodedBitstreamUnit *unit)
> +{
> +    GetBitContext gbc;
> +    int err;
> +
> +    err = init_get_bits8(&gbc, unit->data, unit->data_size);
> +    if (err < 0)
> +        return err;
> +
> +    err = ff_cbs_alloc_unit_content(ctx, unit);
> +    if (err < 0)
> +        return err;
> +
> +    switch (unit->type) {
> +    case VVC_VPS_NUT:
> +        {
> +            H266RawVPS *vps = unit->content;
> +
> +            err = cbs_h266_read_vps(ctx, &gbc, vps);
> +            if (err < 0)
> +                return err;
> +
> +            err = cbs_h266_replace_vps(ctx, unit);
> +            if (err < 0)
> +                return err;
> +        }
> +        break;
> +    case VVC_SPS_NUT:
> +        {
> +            H266RawSPS *sps = unit->content;
> +
> +            err = cbs_h266_read_sps(ctx, &gbc, sps);
> +            if (err < 0)
> +                return err;
> +
> +            err = cbs_h266_replace_sps(ctx, unit);
> +            if (err < 0)
> +                return err;
> +        }
> +        break;
> +
> +    case VVC_PPS_NUT:
> +        {
> +            H266RawPPS *pps = unit->content;
> +
> +            err = cbs_h266_read_pps(ctx, &gbc, pps);
> +            if (err < 0)
> +                return err;
> +
> +            err = cbs_h266_replace_pps(ctx, unit);
> +            if (err < 0)
> +                return err;
> +        }
> +        break;
> +
> +    case VVC_PH_NUT:
> +        {
> +            H266RawPH *ph = unit->content;
> +            err = cbs_h266_read_ph(ctx, &gbc, ph);
> +            if (err < 0)
> +                return err;
> +            err = cbs_h266_replace_ph(ctx, unit);
> +            if (err < 0)
> +                return err;
> +        }
> +        break;
> +
> +    case VVC_TRAIL_NUT:
> +    case VVC_STSA_NUT:
> +    case VVC_RADL_NUT:
> +    case VVC_RASL_NUT:
> +    case VVC_IDR_W_RADL:
> +    case VVC_IDR_N_LP:
> +    case VVC_CRA_NUT:
> +    case VVC_GDR_NUT:
> +        {
> +            H266RawSlice *slice = unit->content;
> +            int pos, len;
> +
> +            err = cbs_h266_read_slice_header(ctx, &gbc, &slice->header);
> +            if (err < 0)
> +                return err;
> +
> +            if (!cbs_h2645_read_more_rbsp_data(&gbc))
> +                return AVERROR_INVALIDDATA;
> +
> +            pos = get_bits_count(&gbc);
> +            len = unit->data_size;
> +
> +            slice->data_size = len - pos / 8;
> +            slice->data_ref  = av_buffer_ref(unit->data_ref);
> +            if (!slice->data_ref)
> +                return AVERROR(ENOMEM);
> +            slice->data = unit->data + pos / 8;
> +            slice->data_bit_start = pos % 8;
> +        }
> +        break;
> +
> +    case VVC_AUD_NUT:
> +        {
> +            err = cbs_h266_read_aud(ctx, &gbc, unit->content);
> +            if (err < 0)
> +                return err;
> +        }
> +        break;
> +
> +    case VVC_PREFIX_SEI_NUT:
> +    case VVC_SUFFIX_SEI_NUT:
> +        {
> +            err = cbs_h266_read_sei(ctx, &gbc, unit->content,
> +                                    unit->type == VVC_PREFIX_SEI_NUT);
> +
> +            if (err < 0)
> +                return err;
> +        }
> +        break;
> +
> +    default:
> +        return AVERROR(ENOSYS);
> +    }
> +    return 0;
> +}
> +
> static int cbs_h2645_write_slice_data(CodedBitstreamContext *ctx,
>                                       PutBitContext *pbc, const uint8_t *data,
>                                       size_t data_size, int data_bit_start)
> @@ -1213,11 +1379,127 @@ static int cbs_h265_write_nal_unit(CodedBitstreamContext *ctx,
>     return 0;
> }
> 
> +static int cbs_h266_write_nal_unit(CodedBitstreamContext *ctx,
> +                                   CodedBitstreamUnit *unit,
> +                                   PutBitContext *pbc)
> +{
> +    int err;
> +
> +    switch (unit->type) {
> +    case VVC_VPS_NUT:
> +        {
> +            H266RawVPS *vps = unit->content;
> +
> +            err = cbs_h266_write_vps(ctx, pbc, vps);
> +            if (err < 0)
> +                return err;
> +
> +            err = cbs_h266_replace_vps(ctx, unit);
> +            if (err < 0)
> +                return err;
> +        }
> +        break;
> +    case VVC_SPS_NUT:
> +        {
> +            H266RawSPS *sps = unit->content;
> +
> +            err = cbs_h266_write_sps(ctx, pbc, sps);
> +            if (err < 0)
> +                return err;
> +
> +            err = cbs_h266_replace_sps(ctx, unit);
> +            if (err < 0)
> +                return err;
> +        }
> +        break;
> +
> +    case VVC_PPS_NUT:
> +        {
> +            H266RawPPS *pps = unit->content;
> +
> +            err = cbs_h266_write_pps(ctx, pbc, pps);
> +            if (err < 0)
> +                return err;
> +
> +            err = cbs_h266_replace_pps(ctx, unit);
> +            if (err < 0)
> +                return err;
> +        }
> +        break;
> +
> +    case VVC_PH_NUT:
> +        {
> +            H266RawPH *ph = unit->content;
> +            err = cbs_h266_write_ph(ctx, pbc, ph);
> +            if (err < 0)
> +                return err;
> +
> +            err = cbs_h266_replace_ph(ctx, unit);
> +            if (err < 0)
> +                return err;
> +        }
> +        break;
> +
> +    case VVC_TRAIL_NUT:
> +    case VVC_STSA_NUT:
> +    case VVC_RADL_NUT:
> +    case VVC_RASL_NUT:
> +    case VVC_IDR_W_RADL:
> +    case VVC_IDR_N_LP:
> +    case VVC_CRA_NUT:
> +    case VVC_GDR_NUT:
> +        {
> +            H266RawSlice *slice = unit->content;
> +
> +            err = cbs_h266_write_slice_header(ctx, pbc, &slice->header);
> +            if (err < 0)
> +                return err;
> +
> +            if (slice->data) {
> +                err = cbs_h2645_write_slice_data(ctx, pbc, slice->data,
> +                                                 slice->data_size,
> +                                                 slice->data_bit_start);
> +                if (err < 0)
> +                    return err;
> +            } else {
> +                // No slice data - that was just the header.
> +            }
> +        }
> +        break;
> +
> +    case VVC_AUD_NUT:
> +        {
> +            err = cbs_h266_write_aud(ctx, pbc, unit->content);
> +            if (err < 0)
> +                return err;
> +        }
> +        break;
> +
> +    case VVC_PREFIX_SEI_NUT:
> +    case VVC_SUFFIX_SEI_NUT:
> +        {
> +            err = cbs_h266_write_sei(ctx, pbc, unit->content,
> +                                     unit->type == VVC_PREFIX_SEI_NUT);
> +
> +            if (err < 0)
> +                return err;
> +        }
> +        break;
> +
> +    default:
> +        av_log(ctx->log_ctx, AV_LOG_ERROR, "Write unimplemented for "
> +               "NAL unit type %"PRIu32".\n", unit->type);
> +        return AVERROR_PATCHWELCOME;
> +    }
> +
> +    return 0;
> +}
> +
> static int cbs_h2645_unit_requires_zero_byte(enum AVCodecID codec_id,
>                                              CodedBitstreamUnitType type,
>                                              int nal_unit_index)
> {
> -    // Section B.1.2 in H.264, section B.2.2 in H.265.
> +    // Section B.1.2 in H.264, section B.2.2 in H.265, H.266.
>     if (nal_unit_index == 0) {
>         // Assume that this is the first NAL unit in an access unit.
>         return 1;
> @@ -1226,6 +1508,8 @@ static int cbs_h2645_unit_requires_zero_byte(enum AVCodecID codec_id,
>         return type == H264_NAL_SPS || type == H264_NAL_PPS;
>     if (codec_id == AV_CODEC_ID_HEVC)
>         return type == HEVC_NAL_VPS || type == HEVC_NAL_SPS || type == HEVC_NAL_PPS;
> +    if (codec_id == AV_CODEC_ID_VVC)
> +        return type >= VVC_OPI_NUT && type <= VVC_SUFFIX_APS_NUT;
>     return 0;
> }
> 
> @@ -1377,6 +1661,35 @@ static void cbs_h265_close(CodedBitstreamContext *ctx)
>         av_buffer_unref(&h265->pps_ref[i]);
> }
> 
> +static void cbs_h266_flush(CodedBitstreamContext *ctx)
> +{
> +    CodedBitstreamH266Context *h266 = ctx->priv_data;
> +
> +    for (int i = 0; i < FF_ARRAY_ELEMS(h266->vps); i++) {
> +        av_buffer_unref(&h266->vps_ref[i]);
> +        h266->vps[i] = NULL;
> +    }
> +
> +    for (int i = 0; i < FF_ARRAY_ELEMS(h266->sps); i++) {
> +        av_buffer_unref(&h266->sps_ref[i]);
> +        h266->sps[i] = NULL;
> +    }
> +    for (int i = 0; i < FF_ARRAY_ELEMS(h266->pps); i++) {
> +        av_buffer_unref(&h266->pps_ref[i]);
> +        h266->pps[i] = NULL;
> +    }
> +    av_buffer_unref(&h266->priv.ph_ref);
> +    h266->priv.ph = NULL;
> +}
> +
> +static void cbs_h266_close(CodedBitstreamContext *ctx)
> +{
> +    CodedBitstreamH266Context *h266 = ctx->priv_data;
> +
> +    cbs_h266_flush(ctx);
> +    ff_h2645_packet_uninit(&h266->common.read_packet);
> + }
> +
> static void cbs_h264_free_sei(void *opaque, uint8_t *content)
> {
>     H264RawSEI *sei = (H264RawSEI*)content;
> @@ -1431,6 +1744,33 @@ static const CodedBitstreamUnitTypeDescriptor cbs_h265_unit_types[] = {
>     CBS_UNIT_TYPE_END_OF_LIST
> };
> 
> +static void cbs_h266_free_sei(void *opaque, uint8_t *content)
> +{
> +    H265RawSEI *sei = (H265RawSEI*)content;
> +    ff_cbs_sei_free_message_list(&sei->message_list);
> +    av_free(content);
> +}
> +
> +static const CodedBitstreamUnitTypeDescriptor cbs_h266_unit_types[] = {
> +    CBS_UNIT_TYPE_INTERNAL_REF(VVC_VPS_NUT, H266RawVPS, extension_data.data),
> +    CBS_UNIT_TYPE_INTERNAL_REF(VVC_SPS_NUT, H266RawSPS, extension_data.data),
> +    CBS_UNIT_TYPE_INTERNAL_REF(VVC_PPS_NUT, H266RawPPS, extension_data.data),
> +
> +    CBS_UNIT_TYPE_POD(VVC_PH_NUT , H266RawPH),
> +    CBS_UNIT_TYPE_POD(VVC_AUD_NUT, H266RawAUD),
> +
> +    CBS_UNIT_RANGE_INTERNAL_REF(VVC_TRAIL_NUT, VVC_RASL_NUT,
> +                                H266RawSlice, data),
> +
> +    CBS_UNIT_RANGE_INTERNAL_REF(VVC_IDR_W_RADL, VVC_GDR_NUT,
> +                                H266RawSlice, data),
> +
> +    CBS_UNIT_TYPES_COMPLEX((VVC_PREFIX_SEI_NUT, VVC_SUFFIX_SEI_NUT),
> +                           H266RawSEI, cbs_h266_free_sei),
> +
> +    CBS_UNIT_TYPE_END_OF_LIST
> +};
> +
> const CodedBitstreamType ff_cbs_type_h264 = {
>     .codec_id          = AV_CODEC_ID_H264,
> 
> @@ -1463,6 +1803,22 @@ const CodedBitstreamType ff_cbs_type_h265 = {
>     .close             = &cbs_h265_close,
> };
> 
> +const CodedBitstreamType ff_cbs_type_h266 = {
> +    .codec_id          = AV_CODEC_ID_VVC,
> +
> +    .priv_data_size    = sizeof(CodedBitstreamH266Context),
> +
> +    .unit_types        = cbs_h266_unit_types,
> +
> +    .split_fragment    = &cbs_h2645_split_fragment,
> +    .read_unit         = &cbs_h266_read_nal_unit,
> +    .write_unit        = &cbs_h266_write_nal_unit,
> +    .assemble_fragment = &cbs_h2645_assemble_fragment,
> +
> +    .flush             = &cbs_h266_flush,
> +    .close             = &cbs_h266_close,
> +};
> +
> static const SEIMessageTypeDescriptor cbs_sei_common_types[] = {
>     {
>         SEI_TYPE_FILLER_PAYLOAD,
> @@ -1607,6 +1963,16 @@ static const SEIMessageTypeDescriptor cbs_sei_h265_types[] = {
>     SEI_MESSAGE_TYPE_END
> };
> 
> +static const SEIMessageTypeDescriptor cbs_sei_h266_types[] = {
> +    {
> +        SEI_TYPE_DECODED_PICTURE_HASH,
> +        0, 1,
> +        sizeof(H266RawSEIDecodedPictureHash),
> +        SEI_MESSAGE_RW(h266, sei_decoded_picture_hash),
> +    },
> +    SEI_MESSAGE_TYPE_END
> +};
> +
> const SEIMessageTypeDescriptor *ff_cbs_sei_find_type(CodedBitstreamContext *ctx,
>                                                      int payload_type)
> {
> @@ -1625,6 +1991,9 @@ const SEIMessageTypeDescriptor *ff_cbs_sei_find_type(CodedBitstreamContext *ctx,
>     case AV_CODEC_ID_H265:
>         codec_list = cbs_sei_h265_types;
>         break;
> +    case AV_CODEC_ID_H266:
> +        codec_list = cbs_sei_h266_types;
> +        break;
>     default:
>         return NULL;
>     }
> diff --git a/libavcodec/cbs_h266.h b/libavcodec/cbs_h266.h
> new file mode 100644
> index 0000000000..f2f72f780d
> --- /dev/null
> +++ b/libavcodec/cbs_h266.h
> @@ -0,0 +1,791 @@
> +/*
> + * This file is part of FFmpeg.
> + *
> + * FFmpeg is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU Lesser General Public
> + * License as published by the Free Software Foundation; either
> + * version 2.1 of the License, or (at your option) any later version.
> + *
> + * FFmpeg is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
> + * Lesser General Public License for more details.
> + *
> + * You should have received a copy of the GNU Lesser General Public
> + * License along with FFmpeg; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
> + */
> +
> +#ifndef AVCODEC_CBS_H266_H
> +#define AVCODEC_CBS_H266_H
> +
> +#include <stddef.h>
> +#include <stdint.h>
> +
> +#include "cbs_h2645.h"
> +#include "cbs_sei.h"
> +#include "vvc.h"
> +
> +typedef struct H266RawNALUnitHeader {
> +    uint8_t nuh_layer_id;
> +    uint8_t nal_unit_type;
> +    uint8_t nuh_temporal_id_plus1;
> +    uint8_t nuh_reserved_zero_bit;
> +} H266RawNALUnitHeader;
> +
> +typedef struct H266GeneralConstraintsInfo {
> +    uint8_t gci_present_flag;
> +    /* general */
> +    uint8_t gci_intra_only_constraint_flag;
> +    uint8_t gci_all_layers_independent_constraint_flag;
> +    uint8_t gci_one_au_only_constraint_flag;
> +
> +    /* picture format */
> +    uint8_t gci_sixteen_minus_max_bitdepth_constraint_idc;
> +    uint8_t gci_three_minus_max_chroma_format_constraint_idc;
> +
> +    /* NAL unit type related */
> +    uint8_t gci_no_mixed_nalu_types_in_pic_constraint_flag;
> +    uint8_t gci_no_trail_constraint_flag;
> +    uint8_t gci_no_stsa_constraint_flag;
> +    uint8_t gci_no_rasl_constraint_flag;
> +    uint8_t gci_no_radl_constraint_flag;
> +    uint8_t gci_no_idr_constraint_flag;
> +    uint8_t gci_no_cra_constraint_flag;
> +    uint8_t gci_no_gdr_constraint_flag;
> +    uint8_t gci_no_aps_constraint_flag;
> +    uint8_t gci_no_idr_rpl_constraint_flag;
> +
> +    /* tile, slice, subpicture partitioning */
> +    uint8_t gci_one_tile_per_pic_constraint_flag;
> +    uint8_t gci_pic_header_in_slice_header_constraint_flag;
> +    uint8_t gci_one_slice_per_pic_constraint_flag;
> +    uint8_t gci_no_rectangular_slice_constraint_flag;
> +    uint8_t gci_one_slice_per_subpic_constraint_flag;
> +    uint8_t gci_no_subpic_info_constraint_flag;
> +
> +    /* CTU and block partitioning */
> +    uint8_t gci_three_minus_max_log2_ctu_size_constraint_idc;
> +    uint8_t gci_no_partition_constraints_override_constraint_flag;
> +    uint8_t gci_no_mtt_constraint_flag;
> +    uint8_t gci_no_qtbtt_dual_tree_intra_constraint_flag;
> +
> +    /* intra */
> +    uint8_t gci_no_palette_constraint_flag;
> +    uint8_t gci_no_ibc_constraint_flag;
> +    uint8_t gci_no_isp_constraint_flag;
> +    uint8_t gci_no_mrl_constraint_flag;
> +    uint8_t gci_no_mip_constraint_flag;
> +    uint8_t gci_no_cclm_constraint_flag;
> +
> +    /* inter */
> +    uint8_t gci_no_ref_pic_resampling_constraint_flag;
> +    uint8_t gci_no_res_change_in_clvs_constraint_flag;;
> +    uint8_t gci_no_weighted_prediction_constraint_flag;
> +    uint8_t gci_no_ref_wraparound_constraint_flag;
> +    uint8_t gci_no_temporal_mvp_constraint_flag;
> +    uint8_t gci_no_sbtmvp_constraint_flag;
> +    uint8_t gci_no_amvr_constraint_flag;
> +    uint8_t gci_no_bdof_constraint_flag;
> +    uint8_t gci_no_smvd_constraint_flag;
> +    uint8_t gci_no_dmvr_constraint_flag;
> +    uint8_t gci_no_mmvd_constraint_flag;
> +    uint8_t gci_no_affine_motion_constraint_flag;
> +    uint8_t gci_no_prof_constraint_flag;
> +    uint8_t gci_no_bcw_constraint_flag;
> +    uint8_t gci_no_ciip_constraint_flag;
> +    uint8_t gci_no_gpm_constraint_flag;
> +
> +    /* transform, quantization, residual */
> +    uint8_t gci_no_luma_transform_size_64_constraint_flag;
> +    uint8_t gci_no_transform_skip_constraint_flag;
> +    uint8_t gci_no_bdpcm_constraint_flag;
> +    uint8_t gci_no_mts_constraint_flag;
> +    uint8_t gci_no_lfnst_constraint_flag;
> +    uint8_t gci_no_joint_cbcr_constraint_flag;
> +    uint8_t gci_no_sbt_constraint_flag;
> +    uint8_t gci_no_act_constraint_flag;
> +    uint8_t gci_no_explicit_scaling_list_constraint_flag;
> +    uint8_t gci_no_dep_quant_constraint_flag;
> +    uint8_t gci_no_sign_data_hiding_constraint_flag;
> +    uint8_t gci_no_cu_qp_delta_constraint_flag;
> +    uint8_t gci_no_chroma_qp_offset_constraint_flag;
> +
> +    /* loop filter */
> +    uint8_t gci_no_sao_constraint_flag;
> +    uint8_t gci_no_alf_constraint_flag;
> +    uint8_t gci_no_ccalf_constraint_flag;
> +    uint8_t gci_no_lmcs_constraint_flag;
> +    uint8_t gci_no_ladf_constraint_flag;
> +    uint8_t gci_no_virtual_boundaries_constraint_flag;
> +    uint8_t gci_num_reserved_bits;
> +    uint8_t gci_reserved_zero_bit[255];
> +} H266GeneralConstraintsInfo;
> +
> +typedef struct H266RawProfileTierLevel {
> +    uint8_t  general_profile_idc;
> +    uint8_t  general_tier_flag;
> +    uint8_t  general_level_idc;
> +    uint8_t  ptl_frame_only_constraint_flag;
> +    uint8_t  ptl_multilayer_enabled_flag;
> +    H266GeneralConstraintsInfo general_constraints_info;
> +    uint8_t  ptl_sublayer_level_present_flag[VVC_MAX_SUBLAYERS - 1];
> +    uint8_t  sublayer_level_idc[VVC_MAX_SUBLAYERS - 1];
> +    uint8_t  ptl_num_sub_profiles;
> +    uint32_t general_sub_profile_idc[VVC_MAX_SUB_PROFILES];
> +
> +    uint8_t  ptl_reserved_zero_bit;
> +} H266RawProfileTierLevel;
> +
> +typedef struct H266RawExtensionData {
> +    uint8_t     *data;
> +    AVBufferRef *data_ref;
> +    size_t       bit_length;
> +} H266RawExtensionData;
> +
> +typedef struct H266DpbParameters {
> +    uint8_t dpb_max_dec_pic_buffering_minus1[VVC_MAX_SUBLAYERS];
> +    uint8_t dpb_max_num_reorder_pics[VVC_MAX_SUBLAYERS];
> +    uint8_t dpb_max_latency_increase_plus1[VVC_MAX_SUBLAYERS];
> +} H266DpbParameters;
> +
> +typedef struct H266RefPicListStruct {
> +    uint8_t num_ref_entries;
> +    uint8_t ltrp_in_header_flag;
> +    uint8_t inter_layer_ref_pic_flag[VVC_MAX_REF_ENTRIES];
> +    uint8_t st_ref_pic_flag[VVC_MAX_REF_ENTRIES];
> +    uint8_t abs_delta_poc_st[VVC_MAX_REF_ENTRIES];
> +    uint8_t strp_entry_sign_flag[VVC_MAX_REF_ENTRIES];
> +    uint8_t rpls_poc_lsb_lt[VVC_MAX_REF_ENTRIES];
> +    uint8_t ilrp_idx[VVC_MAX_REF_ENTRIES];
> +} H266RefPicListStruct;
> +
> +typedef struct H266RefPicLists {
> +    uint8_t  rpl_sps_flag[2];
> +    uint8_t  rpl_idx[2];
> +    H266RefPicListStruct rpl_ref_list[2];
> +    uint16_t poc_lsb_lt[2][VVC_MAX_REF_ENTRIES];
> +    uint8_t  delta_poc_msb_cycle_present_flag[2][VVC_MAX_REF_ENTRIES];
> +    uint16_t delta_poc_msb_cycle_lt[2][VVC_MAX_REF_ENTRIES];
> +} H266RefPicLists;
> +
> +typedef struct H266RawGeneralTimingHrdParameters {
> +    uint32_t num_units_in_tick;
> +    uint32_t time_scale;
> +    uint8_t  general_nal_hrd_params_present_flag;
> +    uint8_t  general_vcl_hrd_params_present_flag;
> +    uint8_t  general_same_pic_timing_in_all_ols_flag;
> +    uint8_t  general_du_hrd_params_present_flag;
> +    uint8_t  tick_divisor_minus2;
> +    uint8_t  bit_rate_scale;
> +    uint8_t  cpb_size_scale;
> +    uint8_t  cpb_size_du_scale;
> +    uint8_t  hrd_cpb_cnt_minus1;
> +} H266RawGeneralTimingHrdParameters;
> +
> +typedef struct H266RawSubLayerHRDParameters {
> +    uint32_t bit_rate_value_minus1[VVC_MAX_SUBLAYERS][VVC_MAX_CPB_CNT];
> +    uint32_t cpb_size_value_minus1[VVC_MAX_SUBLAYERS][VVC_MAX_CPB_CNT];
> +    uint32_t cpb_size_du_value_minus1[VVC_MAX_SUBLAYERS][VVC_MAX_CPB_CNT];
> +    uint32_t bit_rate_du_value_minus1[VVC_MAX_SUBLAYERS][VVC_MAX_CPB_CNT];
> +    uint8_t  cbr_flag[VVC_MAX_SUBLAYERS][VVC_MAX_CPB_CNT];
> +} H266RawSubLayerHRDParameters;
> +
> +typedef struct H266RawOlsTimingHrdParameters {
> +    uint8_t  fixed_pic_rate_general_flag[VVC_MAX_SUBLAYERS];
> +    uint8_t  fixed_pic_rate_within_cvs_flag[VVC_MAX_SUBLAYERS];
> +    uint16_t elemental_duration_in_tc_minus1[VVC_MAX_SUBLAYERS];
> +    uint8_t  low_delay_hrd_flag[VVC_MAX_SUBLAYERS];
> +    H266RawSubLayerHRDParameters nal_sub_layer_hrd_parameters;
> +    H266RawSubLayerHRDParameters vcl_sub_layer_hrd_parameters;
> +} H266RawOlsTimingHrdParameters;
> +
> +typedef struct H266RawVUI {
> +    uint8_t  vui_progressive_source_flag;
> +    uint8_t  vui_interlaced_source_flag;
> +    uint8_t  vui_non_packed_constraint_flag;
> +    uint8_t  vui_non_projected_constraint_flag;
> +
> +    uint8_t  vui_aspect_ratio_info_present_flag;
> +    uint8_t  vui_aspect_ratio_constant_flag;
> +    uint8_t  vui_aspect_ratio_idc;
> +
> +    uint16_t vui_sar_width;
> +    uint16_t vui_sar_height;;
> +
> +    uint8_t  vui_overscan_info_present_flag;
> +    uint8_t  vui_overscan_appropriate_flag;
> +
> +    uint8_t  vui_colour_description_present_flag;
> +    uint8_t  vui_colour_primaries;
> +
> +    uint8_t  vui_transfer_characteristics;
> +    uint8_t  vui_matrix_coeffs;
> +    uint8_t  vui_full_range_flag;
> +
> +    uint8_t  vui_chroma_loc_info_present_flag;
> +    uint8_t  vui_chroma_sample_loc_type_frame;
> +    uint8_t  vui_chroma_sample_loc_type_top_field;
> +    uint8_t  vui_chroma_sample_loc_type_bottom_field;
> +    H266RawExtensionData extension_data;
> +} H266RawVUI;
> +
> +typedef struct H266RawVPS {
> +    H266RawNALUnitHeader nal_unit_header;
> +
> +    uint8_t  vps_video_parameter_set_id;
> +    uint8_t  vps_max_layers_minus1;
> +    uint8_t  vps_max_sublayers_minus1;
> +    uint8_t  vps_default_ptl_dpb_hrd_max_tid_flag;
> +    uint8_t  vps_all_independent_layers_flag;
> +    uint8_t  vps_layer_id[VVC_MAX_LAYERS];
> +    uint8_t  vps_independent_layer_flag[VVC_MAX_LAYERS];
> +    uint8_t  vps_max_tid_ref_present_flag[VVC_MAX_LAYERS];
> +    uint8_t  vps_direct_ref_layer_flag[VVC_MAX_LAYERS][VVC_MAX_LAYERS - 1];
> +    uint8_t  vps_max_tid_il_ref_pics_plus1[VVC_MAX_LAYERS][VVC_MAX_LAYERS - 1];
> +    uint8_t  vps_each_layer_is_an_ols_flag;
> +    uint8_t  vps_ols_mode_idc;
> +    uint8_t  vps_num_output_layer_sets_minus2;
> +    uint8_t  vps_ols_output_layer_flag[VVC_MAX_TOTAL_NUM_OLSS][VVC_MAX_LAYERS];
> +
> +    uint8_t  vps_num_ptls_minus1;
> +    uint8_t  vps_pt_present_flag[VVC_MAX_PTLS];
> +    uint8_t  vps_ptl_max_tid[VVC_MAX_PTLS];
> +    H266RawProfileTierLevel vps_profile_tier_level[VVC_MAX_PTLS];
> +    uint8_t  vps_ols_ptl_idx[VVC_MAX_TOTAL_NUM_OLSS];
> +
> +    uint16_t vps_num_dpb_params_minus1;
> +    uint8_t  vps_sublayer_dpb_params_present_flag;
> +    uint8_t  vps_dpb_max_tid[VVC_MAX_TOTAL_NUM_OLSS];
> +    H266DpbParameters vps_dpb_params[VVC_MAX_TOTAL_NUM_OLSS];
> +    uint16_t vps_ols_dpb_pic_width[VVC_MAX_TOTAL_NUM_OLSS];
> +    uint16_t vps_ols_dpb_pic_height[VVC_MAX_TOTAL_NUM_OLSS];
> +    uint8_t  vps_ols_dpb_chroma_format[VVC_MAX_TOTAL_NUM_OLSS];
> +    uint8_t  vps_ols_dpb_bitdepth_minus8[VVC_MAX_TOTAL_NUM_OLSS];
> +    uint16_t vps_ols_dpb_params_idx[VVC_MAX_TOTAL_NUM_OLSS];
> +
> +    uint8_t  vps_timing_hrd_params_present_flag;
> +    H266RawGeneralTimingHrdParameters vps_general_timing_hrd_parameters;
> +    uint8_t  vps_sublayer_cpb_params_present_flag;
> +    uint16_t vps_num_ols_timing_hrd_params_minus1;
> +    uint8_t  vps_hrd_max_tid[VVC_MAX_TOTAL_NUM_OLSS];
> +    H266RawOlsTimingHrdParameters vps_ols_timing_hrd_parameters;
> +    uint8_t  vps_ols_timing_hrd_idx[VVC_MAX_TOTAL_NUM_OLSS];
> +
> +    uint8_t  vps_extension_flag;
> +    H266RawExtensionData extension_data;
> +} H266RawVPS;
> +
> +typedef struct H266RawSPS {
> +    H266RawNALUnitHeader nal_unit_header;
> +
> +    uint8_t  sps_seq_parameter_set_id;
> +    uint8_t  sps_video_parameter_set_id;
> +    uint8_t  sps_max_sublayers_minus1;
> +    uint8_t  sps_chroma_format_idc;
> +    uint8_t  sps_log2_ctu_size_minus5;
> +    uint8_t  sps_ptl_dpb_hrd_params_present_flag;
> +    H266RawProfileTierLevel profile_tier_level;
> +    uint8_t  sps_gdr_enabled_flag;
> +    uint8_t  sps_ref_pic_resampling_enabled_flag;
> +    uint8_t  sps_res_change_in_clvs_allowed_flag;
> +
> +    uint16_t sps_pic_width_max_in_luma_samples;
> +    uint16_t sps_pic_height_max_in_luma_samples;
> +
> +    uint8_t  sps_conformance_window_flag;
> +    uint16_t sps_conf_win_left_offset;
> +    uint16_t sps_conf_win_right_offset;
> +    uint16_t sps_conf_win_top_offset;
> +    uint16_t sps_conf_win_bottom_offset;
> +
> +    uint8_t  sps_subpic_info_present_flag;
> +    uint16_t sps_num_subpics_minus1;
> +    uint8_t  sps_independent_subpics_flag;
> +    uint8_t  sps_subpic_same_size_flag;
> +    uint16_t sps_subpic_ctu_top_left_x[VVC_MAX_SLICES];
> +    uint16_t sps_subpic_ctu_top_left_y[VVC_MAX_SLICES];
> +    uint16_t sps_subpic_width_minus1[VVC_MAX_SLICES];
> +    uint16_t sps_subpic_height_minus1[VVC_MAX_SLICES];
> +    uint8_t  sps_subpic_treated_as_pic_flag[VVC_MAX_SLICES];
> +    uint8_t  sps_loop_filter_across_subpic_enabled_flag[VVC_MAX_SLICES];
> +    uint8_t  sps_subpic_id_len_minus1;
> +    uint8_t  sps_subpic_id_mapping_explicitly_signalled_flag;
> +    uint8_t  sps_subpic_id_mapping_present_flag;
> +    uint32_t sps_subpic_id[VVC_MAX_SLICES];
> +
> +
> +    uint8_t  sps_bitdepth_minus8;
> +    uint8_t  sps_entropy_coding_sync_enabled_flag;
> +    uint8_t  sps_entry_point_offsets_present_flag;
> +
> +    uint8_t  sps_log2_max_pic_order_cnt_lsb_minus4;
> +    uint8_t  sps_poc_msb_cycle_flag;
> +    uint8_t  sps_poc_msb_cycle_len_minus1;
> +
> +    uint8_t  sps_num_extra_ph_bytes;
> +    uint8_t  sps_extra_ph_bit_present_flag[16];
> +
> +    uint8_t  sps_num_extra_sh_bytes;
> +    uint8_t  sps_extra_sh_bit_present_flag[16];
> +
> +    uint8_t  sps_sublayer_dpb_params_flag;
> +    H266DpbParameters sps_dpb_params;
> +
> +    uint8_t  sps_log2_min_luma_coding_block_size_minus2;
> +    uint8_t  sps_partition_constraints_override_enabled_flag;
> +    uint8_t  sps_log2_diff_min_qt_min_cb_intra_slice_luma;
> +    uint8_t  sps_max_mtt_hierarchy_depth_intra_slice_luma;
> +    uint8_t  sps_log2_diff_max_bt_min_qt_intra_slice_luma;
> +    uint8_t  sps_log2_diff_max_tt_min_qt_intra_slice_luma;
> +
> +    uint8_t  sps_qtbtt_dual_tree_intra_flag;
> +    uint8_t  sps_log2_diff_min_qt_min_cb_intra_slice_chroma;
> +    uint8_t  sps_max_mtt_hierarchy_depth_intra_slice_chroma;
> +    uint8_t  sps_log2_diff_max_bt_min_qt_intra_slice_chroma;
> +    uint8_t  sps_log2_diff_max_tt_min_qt_intra_slice_chroma;
> +
> +    uint8_t  sps_log2_diff_min_qt_min_cb_inter_slice;
> +    uint8_t  sps_max_mtt_hierarchy_depth_inter_slice;
> +    uint8_t  sps_log2_diff_max_bt_min_qt_inter_slice;
> +    uint8_t  sps_log2_diff_max_tt_min_qt_inter_slice;
> +
> +    uint8_t  sps_max_luma_transform_size_64_flag;
> +
> +    uint8_t  sps_transform_skip_enabled_flag;
> +    uint8_t  sps_log2_transform_skip_max_size_minus2;
> +    uint8_t  sps_bdpcm_enabled_flag;
> +
> +    uint8_t  sps_mts_enabled_flag;
> +    uint8_t  sps_explicit_mts_intra_enabled_flag;
> +    uint8_t  sps_explicit_mts_inter_enabled_flag;
> +
> +    uint8_t  sps_lfnst_enabled_flag;
> +
> +    uint8_t  sps_joint_cbcr_enabled_flag;
> +    uint8_t  sps_same_qp_table_for_chroma_flag;
> +
> +    int8_t   sps_qp_table_start_minus26[VVC_MAX_SAMPLE_ARRAYS];
> +    uint8_t  sps_num_points_in_qp_table_minus1[VVC_MAX_SAMPLE_ARRAYS];
> +    uint8_t  sps_delta_qp_in_val_minus1[VVC_MAX_SAMPLE_ARRAYS][VVC_MAX_POINTS_IN_QP_TABLE];
> +    uint8_t  sps_delta_qp_diff_val[VVC_MAX_SAMPLE_ARRAYS][VVC_MAX_POINTS_IN_QP_TABLE];
> +
> +    uint8_t  sps_sao_enabled_flag;
> +    uint8_t  sps_alf_enabled_flag;
> +    uint8_t  sps_ccalf_enabled_flag;
> +    uint8_t  sps_lmcs_enabled_flag;
> +    uint8_t  sps_weighted_pred_flag;
> +    uint8_t  sps_weighted_bipred_flag;
> +    uint8_t  sps_long_term_ref_pics_flag;
> +    uint8_t  sps_inter_layer_prediction_enabled_flag;
> +    uint8_t  sps_idr_rpl_present_flag;
> +    uint8_t  sps_rpl1_same_as_rpl0_flag;
> +
> +    uint8_t  sps_num_ref_pic_lists[2];
> +    H266RefPicListStruct sps_ref_pic_list_struct[2][VVC_MAX_REF_PIC_LISTS];
> +
> +    uint8_t  sps_ref_wraparound_enabled_flag;
> +    uint8_t  sps_temporal_mvp_enabled_flag;
> +    uint8_t  sps_sbtmvp_enabled_flag;
> +    uint8_t  sps_amvr_enabled_flag;
> +    uint8_t  sps_bdof_enabled_flag;
> +    uint8_t  sps_bdof_control_present_in_ph_flag;
> +    uint8_t  sps_smvd_enabled_flag;
> +    uint8_t  sps_dmvr_enabled_flag;
> +    uint8_t  sps_dmvr_control_present_in_ph_flag;
> +    uint8_t  sps_mmvd_enabled_flag;
> +    uint8_t  sps_mmvd_fullpel_only_enabled_flag;
> +    uint8_t  sps_six_minus_max_num_merge_cand;
> +    uint8_t  sps_sbt_enabled_flag;
> +    uint8_t  sps_affine_enabled_flag;
> +    uint8_t  sps_five_minus_max_num_subblock_merge_cand;
> +    uint8_t  sps_6param_affine_enabled_flag;
> +    uint8_t  sps_affine_amvr_enabled_flag;
> +    uint8_t  sps_affine_prof_enabled_flag;
> +    uint8_t  sps_prof_control_present_in_ph_flag;
> +    uint8_t  sps_bcw_enabled_flag;
> +    uint8_t  sps_ciip_enabled_flag;
> +    uint8_t  sps_gpm_enabled_flag;
> +    uint8_t  sps_max_num_merge_cand_minus_max_num_gpm_cand;
> +    uint8_t  sps_log2_parallel_merge_level_minus2;
> +    uint8_t  sps_isp_enabled_flag;
> +    uint8_t  sps_mrl_enabled_flag;
> +    uint8_t  sps_mip_enabled_flag;
> +    uint8_t  sps_cclm_enabled_flag;
> +    uint8_t  sps_chroma_horizontal_collocated_flag;
> +    uint8_t  sps_chroma_vertical_collocated_flag;
> +    uint8_t  sps_palette_enabled_flag;
> +    uint8_t  sps_act_enabled_flag;
> +    uint8_t  sps_min_qp_prime_ts;
> +    uint8_t  sps_ibc_enabled_flag;
> +    uint8_t  sps_six_minus_max_num_ibc_merge_cand;
> +    uint8_t  sps_ladf_enabled_flag;
> +    uint8_t  sps_num_ladf_intervals_minus2;
> +    int8_t   sps_ladf_lowest_interval_qp_offset;
> +    int8_t   sps_ladf_qp_offset[4];
> +    uint16_t sps_ladf_delta_threshold_minus1[4];
> +
> +    uint8_t  sps_explicit_scaling_list_enabled_flag;
> +    uint8_t  sps_scaling_matrix_for_lfnst_disabled_flag;
> +    uint8_t  sps_scaling_matrix_for_alternative_colour_space_disabled_flag;
> +    uint8_t  sps_scaling_matrix_designated_colour_space_flag;
> +    uint8_t  sps_dep_quant_enabled_flag;
> +    uint8_t  sps_sign_data_hiding_enabled_flag;
> +
> +    uint8_t  sps_virtual_boundaries_enabled_flag;
> +    uint8_t  sps_virtual_boundaries_present_flag;
> +    uint8_t  sps_num_ver_virtual_boundaries;
> +    uint16_t sps_virtual_boundary_pos_x_minus1[3];
> +    uint8_t  sps_num_hor_virtual_boundaries;
> +    uint16_t sps_virtual_boundary_pos_y_minus1[3];
> +
> +    uint8_t  sps_timing_hrd_params_present_flag;
> +    uint8_t  sps_sublayer_cpb_params_present_flag;
> +    H266RawGeneralTimingHrdParameters sps_general_timing_hrd_parameters;
> +    H266RawOlsTimingHrdParameters sps_ols_timing_hrd_parameters;
> +
> +    uint8_t  sps_field_seq_flag;
> +    uint8_t  sps_vui_parameters_present_flag;
> +    uint16_t sps_vui_payload_size_minus1;
> +    H266RawVUI vui;
> +
> +    uint8_t  sps_extension_flag;
> +
> +    H266RawExtensionData extension_data;
> +
> +} H266RawSPS;
> +
> +typedef struct H266RawPPS {
> +    H266RawNALUnitHeader nal_unit_header;
> +
> +    uint8_t  pps_pic_parameter_set_id;
> +    uint8_t  pps_seq_parameter_set_id;
> +    uint8_t  pps_mixed_nalu_types_in_pic_flag;
> +    uint16_t pps_pic_width_in_luma_samples;
> +    uint16_t pps_pic_height_in_luma_samples;
> +
> +    uint8_t  pps_conformance_window_flag;
> +    uint16_t pps_conf_win_left_offset;
> +    uint16_t pps_conf_win_right_offset;
> +    uint16_t pps_conf_win_top_offset;
> +    uint16_t pps_conf_win_bottom_offset;
> +
> +    uint8_t  pps_scaling_window_explicit_signalling_flag;
> +    int16_t  pps_scaling_win_left_offset;
> +    int16_t  pps_scaling_win_right_offset;
> +    int16_t  pps_scaling_win_top_offset;
> +    int16_t  pps_scaling_win_bottom_offset;
> +
> +    uint8_t  pps_output_flag_present_flag;
> +    uint8_t  pps_no_pic_partition_flag;
> +
> +    uint8_t  pps_subpic_id_mapping_present_flag;
> +    uint16_t pps_num_subpics_minus1;
> +    uint8_t  pps_subpic_id_len_minus1;
> +    uint16_t pps_subpic_id[VVC_MAX_SLICES];
> +
> +    uint8_t  pps_log2_ctu_size_minus5;
> +    uint8_t  pps_num_exp_tile_columns_minus1;
> +    uint8_t  pps_num_exp_tile_rows_minus1;
> +    uint16_t pps_tile_column_width_minus1[VVC_MAX_TILE_COLUMNS];
> +    uint16_t pps_tile_row_height_minus1[VVC_MAX_TILE_ROWS];
> +
> +    uint8_t  pps_loop_filter_across_tiles_enabled_flag;
> +    uint8_t  pps_rect_slice_flag;
> +    uint8_t  pps_single_slice_per_subpic_flag;
> +
> +    uint16_t pps_num_slices_in_pic_minus1;
> +    uint8_t  pps_tile_idx_delta_present_flag;
> +    uint16_t pps_slice_width_in_tiles_minus1[VVC_MAX_SLICES];
> +    uint16_t pps_slice_height_in_tiles_minus1[VVC_MAX_SLICES];
> +    uint16_t pps_num_exp_slices_in_tile[VVC_MAX_SLICES];
> +    uint16_t pps_exp_slice_height_in_ctus_minus1[VVC_MAX_SLICES][VVC_MAX_TILE_ROWS];
> +    int16_t  pps_tile_idx_delta_val[VVC_MAX_SLICES];
> +
> +    uint8_t  pps_loop_filter_across_slices_enabled_flag;
> +    uint8_t  pps_cabac_init_present_flag;
> +    uint8_t  pps_num_ref_idx_default_active_minus1[2];
> +    uint8_t  pps_rpl1_idx_present_flag;
> +    uint8_t  pps_weighted_pred_flag;
> +    uint8_t  pps_weighted_bipred_flag;
> +    uint8_t  pps_ref_wraparound_enabled_flag;
> +    uint16_t  pps_pic_width_minus_wraparound_offset;
> +    int8_t   pps_init_qp_minus26;
> +    uint8_t  pps_cu_qp_delta_enabled_flag;
> +    uint8_t  pps_chroma_tool_offsets_present_flag;
> +    int8_t   pps_cb_qp_offset;
> +    int8_t   pps_cr_qp_offset;
> +    uint8_t  pps_joint_cbcr_qp_offset_present_flag;
> +    int8_t   pps_joint_cbcr_qp_offset_value;
> +    uint8_t  pps_slice_chroma_qp_offsets_present_flag;
> +    uint8_t  pps_cu_chroma_qp_offset_list_enabled_flag;
> +    uint8_t  pps_chroma_qp_offset_list_len_minus1;
> +    uint8_t  pps_cb_qp_offset_list[6];
> +    uint8_t  pps_cr_qp_offset_list[6];
> +    uint8_t  pps_joint_cbcr_qp_offset_list[6];
> +    uint8_t  pps_deblocking_filter_control_present_flag;
> +    uint8_t  pps_deblocking_filter_override_enabled_flag;
> +    uint8_t  pps_deblocking_filter_disabled_flag;
> +    uint8_t  pps_dbf_info_in_ph_flag;
> +
> +    int8_t   pps_luma_beta_offset_div2;
> +    int8_t   pps_luma_tc_offset_div2;
> +    int8_t   pps_cb_beta_offset_div2;
> +    int8_t   pps_cb_tc_offset_div2;
> +    int8_t   pps_cr_beta_offset_div2;
> +    int8_t   pps_cr_tc_offset_div2;
> +
> +    uint8_t  pps_rpl_info_in_ph_flag;
> +    uint8_t  pps_sao_info_in_ph_flag;
> +    uint8_t  pps_alf_info_in_ph_flag;
> +    uint8_t  pps_wp_info_in_ph_flag;
> +    uint8_t  pps_qp_delta_info_in_ph_flag;
> +
> +    uint8_t  pps_picture_header_extension_present_flag;
> +    uint8_t  pps_slice_header_extension_present_flag;
> +    uint8_t  pps_extension_flag;
> +    H266RawExtensionData extension_data;
> +
> +    //calculated value;
> +    uint16_t num_tile_columns;
> +    uint16_t num_tile_rows;
> +    uint16_t num_tiles_in_pic;
> +    uint16_t slice_height_in_ctus[VVC_MAX_SLICES];
> +    uint16_t num_slices_in_subpic[VVC_MAX_SLICES];
> +} H266RawPPS;
> +
> +typedef struct H266RawAUD {
> +    H266RawNALUnitHeader nal_unit_header;
> +    uint8_t aud_irap_or_gdr_flag;
> +    uint8_t aud_pic_type;
> +} H266RawAUD;
> +
> +typedef struct H266RawPredWeightTable {
> +    uint8_t  luma_log2_weight_denom;
> +    int8_t   delta_chroma_log2_weight_denom;
> +
> +    uint8_t  num_l0_weights;
> +    uint8_t  luma_weight_l0_flag[15];
> +    uint8_t  chroma_weight_l0_flag[15];
> +    int8_t   delta_luma_weight_l0[15];
> +    int8_t   luma_offset_l0[15];
> +    int8_t   delta_chroma_weight_l0[15][2];
> +    int16_t  delta_chroma_offset_l0[15][2];
> +
> +    uint8_t  num_l1_weights;
> +    uint8_t  luma_weight_l1_flag[15];
> +    uint8_t  chroma_weight_l1_flag[15];
> +    int8_t   delta_luma_weight_l1[15];
> +    int8_t   luma_offset_l1[15];
> +    int8_t   delta_chroma_weight_l1[15][2];
> +    int16_t  delta_chroma_offset_l1[15][2];
> +} H266RawPredWeightTable;
> +
> +typedef struct  H266RawPH {
> +    H266RawNALUnitHeader nal_unit_header;
> +    uint8_t  ph_gdr_or_irap_pic_flag;
> +    uint8_t  ph_non_ref_pic_flag;
> +    uint8_t  ph_gdr_pic_flag;
> +    uint8_t  ph_inter_slice_allowed_flag;
> +    uint8_t  ph_intra_slice_allowed_flag;
> +    uint8_t  ph_pic_parameter_set_id;
> +    uint16_t ph_pic_order_cnt_lsb;
> +    uint8_t  ph_recovery_poc_cnt;
> +    uint8_t  ph_extra_bit[16];
> +    uint8_t  ph_poc_msb_cycle_present_flag;
> +    uint8_t  ph_poc_msb_cycle_val;
> +
> +    uint8_t  ph_alf_enabled_flag;
> +    uint8_t  ph_num_alf_aps_ids_luma;
> +    uint8_t  ph_alf_aps_id_luma[8];
> +    uint8_t  ph_alf_cb_enabled_flag;
> +    uint8_t  ph_alf_cr_enabled_flag;
> +    uint8_t  ph_alf_aps_id_chroma;
> +    uint8_t  ph_alf_cc_cb_enabled_flag;
> +    uint8_t  ph_alf_cc_cb_aps_id;
> +    uint8_t  ph_alf_cc_cr_enabled_flag;
> +    uint8_t  ph_alf_cc_cr_aps_id;
> +
> +    uint8_t  ph_lmcs_enabled_flag;
> +    uint8_t  ph_lmcs_aps_id;
> +    uint8_t  ph_chroma_residual_scale_flag;
> +    uint8_t  ph_explicit_scaling_list_enabled_flag;
> +    uint8_t  ph_scaling_list_aps_id;
> +
> +    uint8_t  ph_virtual_boundaries_present_flag;
> +    uint8_t  ph_num_ver_virtual_boundaries;
> +    uint16_t ph_virtual_boundary_pos_x_minus1[3];
> +    uint8_t  ph_num_hor_virtual_boundaries;
> +    uint16_t ph_virtual_boundary_pos_y_minus1[3];
> +
> +    uint8_t  ph_pic_output_flag;
> +    H266RefPicLists ph_ref_pic_lists;
> +
> +    uint8_t  ph_partition_constraints_override_flag;
> +
> +    uint8_t  ph_log2_diff_min_qt_min_cb_intra_slice_luma;
> +    uint8_t  ph_max_mtt_hierarchy_depth_intra_slice_luma;
> +    uint8_t  ph_log2_diff_max_bt_min_qt_intra_slice_luma;
> +    uint8_t  ph_log2_diff_max_tt_min_qt_intra_slice_luma;
> +    uint8_t  ph_log2_diff_min_qt_min_cb_intra_slice_chroma;
> +
> +    uint8_t  ph_max_mtt_hierarchy_depth_intra_slice_chroma;
> +    uint8_t  ph_log2_diff_max_bt_min_qt_intra_slice_chroma;
> +    uint8_t  ph_log2_diff_max_tt_min_qt_intra_slice_chroma;
> +
> +    uint8_t  ph_cu_qp_delta_subdiv_intra_slice;
> +    uint8_t  ph_cu_chroma_qp_offset_subdiv_intra_slice;
> +
> +    uint8_t  ph_log2_diff_min_qt_min_cb_inter_slice;
> +    uint8_t  ph_max_mtt_hierarchy_depth_inter_slice;
> +    uint8_t  ph_log2_diff_max_bt_min_qt_inter_slice;
> +    uint8_t  ph_log2_diff_max_tt_min_qt_inter_slice;
> +    uint8_t  ph_cu_qp_delta_subdiv_inter_slice;
> +    uint8_t  ph_cu_chroma_qp_offset_subdiv_inter_slice;
> +
> +    uint8_t  ph_temporal_mvp_enabled_flag;
> +    uint8_t  ph_collocated_from_l0_flag;
> +    uint8_t  ph_collocated_ref_idx;
> +    uint8_t  ph_mmvd_fullpel_only_flag;
> +    uint8_t  ph_mvd_l1_zero_flag;
> +    uint8_t  ph_bdof_disabled_flag;
> +    uint8_t  ph_dmvr_disabled_flag;
> +    uint8_t  ph_prof_disabled_flag;
> +
> +    H266RawPredWeightTable ph_pred_weight_table;
> +
> +    int8_t   ph_qp_delta;
> +    uint8_t  ph_joint_cbcr_sign_flag;
> +    uint8_t  ph_sao_luma_enabled_flag;
> +    uint8_t  ph_sao_chroma_enabled_flag;
> +
> +    uint8_t  ph_deblocking_params_present_flag;
> +    uint8_t  ph_deblocking_filter_disabled_flag;
> +    int8_t   ph_luma_beta_offset_div2;
> +    int8_t   ph_luma_tc_offset_div2;
> +    int8_t   ph_cb_beta_offset_div2;
> +    int8_t   ph_cb_tc_offset_div2;
> +    int8_t   ph_cr_beta_offset_div2;
> +    int8_t   ph_cr_tc_offset_div2;
> +
> +    uint8_t  ph_extension_length;
> +    uint8_t  ph_extension_data_byte[256];
> +} H266RawPH;
> +
> +typedef struct  H266RawSliceHeader {
> +    H266RawNALUnitHeader nal_unit_header;
> +    uint8_t  sh_picture_header_in_slice_header_flag;
> +    H266RawPH sh_picture_header;
> +
> +    uint16_t sh_subpic_id;
> +    uint16_t sh_slice_address;
> +    uint8_t  sh_extra_bit[16];
> +    uint8_t  sh_num_tiles_in_slice_minus1;
> +    uint8_t  sh_slice_type;
> +    uint8_t  sh_no_output_of_prior_pics_flag;
> +
> +    uint8_t  sh_alf_enabled_flag;
> +    uint8_t  sh_num_alf_aps_ids_luma;
> +    uint8_t  sh_alf_aps_id_luma[8];
> +    uint8_t  sh_alf_cb_enabled_flag;
> +    uint8_t  sh_alf_cr_enabled_flag;
> +    uint8_t  sh_alf_aps_id_chroma;
> +    uint8_t  sh_alf_cc_cb_enabled_flag;
> +    uint8_t  sh_alf_cc_cb_aps_id;
> +    uint8_t  sh_alf_cc_cr_enabled_flag;
> +    uint8_t  sh_alf_cc_cr_aps_id;
> +
> +    uint8_t  sh_lmcs_used_flag;
> +    uint8_t  sh_explicit_scaling_list_used_flag;
> +
> +    H266RefPicLists sh_ref_pic_lists;
> +
> +    uint8_t  sh_num_ref_idx_active_override_flag;
> +    uint8_t  sh_num_ref_idx_active_minus1[2];
> +    uint8_t  sh_cabac_init_flag;
> +    uint8_t  sh_collocated_from_l0_flag;
> +    uint8_t  sh_collocated_ref_idx;
> +
> +    H266RawPredWeightTable sh_pred_weight_table;
> +
> +    int8_t   sh_qp_delta;
> +    int8_t   sh_cb_qp_offset;
> +    int8_t   sh_cr_qp_offset;
> +    int8_t   sh_joint_cbcr_qp_offset;
> +    uint8_t  sh_cu_chroma_qp_offset_enabled_flag;
> +
> +    uint8_t  sh_sao_luma_used_flag;
> +    uint8_t  sh_sao_chroma_used_flag;
> +
> +    uint8_t  sh_deblocking_params_present_flag;
> +    uint8_t  sh_deblocking_filter_disabled_flag;
> +    int8_t   sh_luma_beta_offset_div2;
> +    int8_t   sh_luma_tc_offset_div2;
> +    int8_t   sh_cb_beta_offset_div2;
> +    int8_t   sh_cb_tc_offset_div2;
> +    int8_t   sh_cr_beta_offset_div2;
> +    int8_t   sh_cr_tc_offset_div2;
> +    uint8_t  sh_dep_quant_used_flag;
> +
> +    uint8_t  sh_sign_data_hiding_used_flag;
> +    uint8_t  sh_ts_residual_coding_disabled_flag;
> +    uint16_t sh_slice_header_extension_length;
> +    uint8_t  sh_slice_header_extension_data_byte[256];
> +
> +    uint8_t  sh_entry_offset_len_minus1;
> +    uint32_t sh_entry_point_offset_minus1[VVC_MAX_ENTRY_POINTS];
> +
> +} H266RawSliceHeader;
> +
> +typedef struct H266RawSlice {
> +    H266RawSliceHeader header;
> +
> +    uint8_t     *data;
> +    AVBufferRef *data_ref;
> +    size_t       data_size;
> +    int          data_bit_start;
> +} H266RawSlice;
> +
> +typedef struct H266RawSEIDecodedPictureHash {
> +    uint8_t  dph_sei_hash_type;
> +    uint8_t  dph_sei_single_component_flag;
> +    uint8_t  dph_sei_picture_md5[3][16];
> +    uint16_t dph_sei_picture_crc[3];
> +    uint32_t dph_sei_picture_checksum[3];
> +
> +    uint8_t  dph_sei_reserved_zero_7bits;
> +} H266RawSEIDecodedPictureHash;
> +
> +typedef struct H266RawSEI {
> +    H266RawNALUnitHeader nal_unit_header;
> +    SEIRawMessageList    message_list;
> +} H266RawSEI;
> +
> +typedef struct CodedBitstreamH266Context {
> +    // Reader/writer context in common with the H.264 implementation.
> +    CodedBitstreamH2645Context common;
> +
> +    // All currently available parameter sets.  These are updated when
> +    // any parameter set NAL unit is read/written with this context.
> +    AVBufferRef *vps_ref[VVC_MAX_VPS_COUNT];
> +    AVBufferRef *sps_ref[VVC_MAX_SPS_COUNT];
> +    AVBufferRef *pps_ref[VVC_MAX_PPS_COUNT];
> +    H266RawVPS  *vps[VVC_MAX_SPS_COUNT];
> +    H266RawSPS  *sps[VVC_MAX_SPS_COUNT];
> +    H266RawPPS  *pps[VVC_MAX_PPS_COUNT];
> +
> +    struct {
> +        AVBufferRef *ph_ref;
> +        H266RawPH   *ph;
> +    } priv;
> +
> +    // The currently active parameter sets.  These are updated when any
> +    // NAL unit refers to the relevant parameter set.  These pointers
> +    // must also be present in the arrays above.
> +    const H266RawVPS *active_vps;
> +    const H266RawSPS *active_sps;
> +    const H266RawPPS *active_pps;
> +
> +} CodedBitstreamH266Context;
> +
> +#endif /* AVCODEC_CBS_H266_H */
> diff --git a/libavcodec/cbs_h266_syntax_template.c b/libavcodec/cbs_h266_syntax_template.c
> new file mode 100644
> index 0000000000..e65db9b4b7
> --- /dev/null
> +++ b/libavcodec/cbs_h266_syntax_template.c
> @@ -0,0 +1,3096 @@
> +/*
> + * This file is part of FFmpeg.
> + *
> + * FFmpeg is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU Lesser General Public
> + * License as published by the Free Software Foundation; either
> + * version 2.1 of the License, or (at your option) any later version.
> + *
> + * FFmpeg is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
> + * Lesser General Public License for more details.
> + *
> + * You should have received a copy of the GNU Lesser General Public
> + * License along with FFmpeg; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
> + */
> +
> +static int FUNC(rbsp_trailing_bits) (CodedBitstreamContext *ctx,
> +                                     RWContext *rw)
> +{
> +    int err;
> +
> +    fixed(1, rbsp_stop_one_bit, 1);
> +    while (byte_alignment(rw) != 0)
> +        fixed(1, rbsp_alignment_zero_bit, 0);
> +    return 0;
> +}
> +
> +static int FUNC(nal_unit_header) (CodedBitstreamContext *ctx, RWContext *rw,
> +                                  H266RawNALUnitHeader *current,
> +                                  int expected_nal_unit_type)
> +{
> +    int err;
> +
> +    fixed(1, forbidden_zero_bit, 0);
> +    flag(nuh_reserved_zero_bit);
> +
> +    u(6, nuh_layer_id, 0, 55);
> +
> +    if (expected_nal_unit_type >= 0)
> +        u(5, nal_unit_type, expected_nal_unit_type, expected_nal_unit_type);
> +    else
> +        ub(5, nal_unit_type);
> +
> +    u(3, nuh_temporal_id_plus1, 1, 7);
> +    return 0;
> +}
> +
> +static int FUNC(byte_alignment) (CodedBitstreamContext *ctx, RWContext *rw)
> +{
> +    int err;
> +
> +    fixed(1, byte_alignment_bit_equal_to_one, 1);
> +    while (byte_alignment(rw) != 0)
> +        fixed(1, byte_alignment_bit_equal_to_zero, 0);
> +    return 0;
> +}
> +
> +static int FUNC(general_constraints_info) (CodedBitstreamContext *ctx,
> +                                           RWContext *rw,
> +                                           H266GeneralConstraintsInfo *current)
> +{
> +    int err, i;
> +
> +    flag(gci_present_flag);
> +    if (current->gci_present_flag) {
> +        /* general */
> +        flag(gci_intra_only_constraint_flag);
> +        flag(gci_all_layers_independent_constraint_flag);
> +        flag(gci_one_au_only_constraint_flag);
> +
> +        /* picture format */
> +        u(4, gci_sixteen_minus_max_bitdepth_constraint_idc, 0, 8);
> +        ub(2, gci_three_minus_max_chroma_format_constraint_idc);
> +
> +        /* NAL unit type related */
> +        flag(gci_no_mixed_nalu_types_in_pic_constraint_flag);
> +        flag(gci_no_trail_constraint_flag);
> +        flag(gci_no_stsa_constraint_flag);
> +        flag(gci_no_rasl_constraint_flag);
> +        flag(gci_no_radl_constraint_flag);
> +        flag(gci_no_idr_constraint_flag);
> +        flag(gci_no_cra_constraint_flag);
> +        flag(gci_no_gdr_constraint_flag);
> +        flag(gci_no_aps_constraint_flag);
> +        flag(gci_no_idr_rpl_constraint_flag);
> +
> +        /* tile, slice, subpicture partitioning */
> +        flag(gci_one_tile_per_pic_constraint_flag);
> +        flag(gci_pic_header_in_slice_header_constraint_flag);
> +        flag(gci_one_slice_per_pic_constraint_flag);
> +        flag(gci_no_rectangular_slice_constraint_flag);
> +        flag(gci_one_slice_per_subpic_constraint_flag);
> +        flag(gci_no_subpic_info_constraint_flag);
> +
> +        /* CTU and block partitioning */
> +        ub(2, gci_three_minus_max_log2_ctu_size_constraint_idc);
> +        flag(gci_no_partition_constraints_override_constraint_flag);
> +        flag(gci_no_mtt_constraint_flag);
> +        flag(gci_no_qtbtt_dual_tree_intra_constraint_flag);
> +
> +        /* intra */
> +        flag(gci_no_palette_constraint_flag);
> +        flag(gci_no_ibc_constraint_flag);
> +        flag(gci_no_isp_constraint_flag);
> +        flag(gci_no_mrl_constraint_flag);
> +        flag(gci_no_mip_constraint_flag);
> +        flag(gci_no_cclm_constraint_flag);
> +
> +        /* inter */
> +        flag(gci_no_ref_pic_resampling_constraint_flag);
> +        flag(gci_no_res_change_in_clvs_constraint_flag);
> +        flag(gci_no_weighted_prediction_constraint_flag);
> +        flag(gci_no_ref_wraparound_constraint_flag);
> +        flag(gci_no_temporal_mvp_constraint_flag);
> +        flag(gci_no_sbtmvp_constraint_flag);
> +        flag(gci_no_amvr_constraint_flag);
> +        flag(gci_no_bdof_constraint_flag);
> +        flag(gci_no_smvd_constraint_flag);
> +        flag(gci_no_dmvr_constraint_flag);
> +        flag(gci_no_mmvd_constraint_flag);
> +        flag(gci_no_affine_motion_constraint_flag);
> +        flag(gci_no_prof_constraint_flag);
> +        flag(gci_no_bcw_constraint_flag);
> +        flag(gci_no_ciip_constraint_flag);
> +        flag(gci_no_gpm_constraint_flag);
> +
> +        /* transform, quantization, residual */
> +        flag(gci_no_luma_transform_size_64_constraint_flag);
> +        flag(gci_no_transform_skip_constraint_flag);
> +        flag(gci_no_bdpcm_constraint_flag);
> +        flag(gci_no_mts_constraint_flag);
> +        flag(gci_no_lfnst_constraint_flag);
> +        flag(gci_no_joint_cbcr_constraint_flag);
> +        flag(gci_no_sbt_constraint_flag);
> +        flag(gci_no_act_constraint_flag);
> +        flag(gci_no_explicit_scaling_list_constraint_flag);
> +        flag(gci_no_dep_quant_constraint_flag);
> +        flag(gci_no_sign_data_hiding_constraint_flag);
> +        flag(gci_no_cu_qp_delta_constraint_flag);
> +        flag(gci_no_chroma_qp_offset_constraint_flag);
> +
> +        /* loop filter */
> +        flag(gci_no_sao_constraint_flag);
> +        flag(gci_no_alf_constraint_flag);
> +        flag(gci_no_ccalf_constraint_flag);
> +        flag(gci_no_lmcs_constraint_flag);
> +        flag(gci_no_ladf_constraint_flag);
> +        flag(gci_no_virtual_boundaries_constraint_flag);
> +        ub(8, gci_num_reserved_bits);
> +        for (i = 0; i < current->gci_num_reserved_bits; i++) {
> +            flags(gci_reserved_zero_bit[i], 1, i);
> +        }
> +    }
> +    while (byte_alignment(rw) != 0)
> +        fixed(1, gci_alignment_zero_bit, 0);
> +    return 0;
> +}
> +
> +static int FUNC(profile_tier_level) (CodedBitstreamContext *ctx,
> +                                     RWContext *rw,
> +                                     H266RawProfileTierLevel *current,
> +                                     int profile_tier_present_flag,
> +                                     int max_num_sub_layers_minus1)
> +{
> +    int err, i;
> +
> +    if (profile_tier_present_flag) {
> +        ub(7, general_profile_idc);
> +        flag(general_tier_flag);
> +    }
> +    ub(8, general_level_idc);
> +    flag(ptl_frame_only_constraint_flag);
> +    flag(ptl_multilayer_enabled_flag);
> +    if (profile_tier_present_flag) {
> +        CHECK(FUNC(general_constraints_info) (ctx, rw,
> +                                              &current->
> +                                              general_constraints_info));
> +    }
> +    for (i = max_num_sub_layers_minus1 - 1; i >= 0; i--)
> +        flags(ptl_sublayer_level_present_flag[i], 1, i);
> +    while (byte_alignment(rw) != 0)
> +        flag(ptl_reserved_zero_bit);
> +    for (i = max_num_sub_layers_minus1 - 1; i >= 0; i--)
> +        if (current->ptl_sublayer_level_present_flag[i])
> +            ubs(8, sublayer_level_idc[i], 1, i);
> +    if (profile_tier_present_flag) {
> +        ub(8, ptl_num_sub_profiles);
> +        for (i = 0; i < current->ptl_num_sub_profiles; i++)
> +            ubs(32, general_sub_profile_idc[i], 1, i);
> +    }
> +    return 0;
> +}
> +
> +static int FUNC(vui_parameters_default) (CodedBitstreamContext *ctx,
> +                                         RWContext *rw, H266RawVUI *current)
> +{
> +    //defined in D.8
> +    infer(vui_progressive_source_flag, 0);
> +    infer(vui_interlaced_source_flag, 0);
> +
> +    infer(vui_non_packed_constraint_flag, 0);
> +    infer(vui_non_projected_constraint_flag, 0);
> +
> +    infer(vui_aspect_ratio_constant_flag, 0);
> +    infer(vui_aspect_ratio_idc, 0);
> +
> +    infer(vui_overscan_info_present_flag, 0);
> +
> +    infer(vui_colour_primaries, 2);
> +    infer(vui_transfer_characteristics, 2);
> +    infer(vui_matrix_coeffs, 2);
> +    infer(vui_full_range_flag, 0);
> +
> +    infer(vui_chroma_sample_loc_type_frame, 6);
> +    infer(vui_chroma_sample_loc_type_top_field, 6);
> +    infer(vui_chroma_sample_loc_type_bottom_field, 6);
> +    return 0;
> +}
> +
> +static int FUNC(vui_parameters) (CodedBitstreamContext *ctx, RWContext *rw,
> +                                 H266RawVUI *current,
> +                                 uint8_t chroma_format_idc)
> +{
> +    int err;
> +
> +    flag(vui_progressive_source_flag);
> +    flag(vui_interlaced_source_flag);
> +    flag(vui_non_packed_constraint_flag);
> +    flag(vui_non_projected_constraint_flag);
> +    flag(vui_aspect_ratio_info_present_flag);
> +    if (current->vui_aspect_ratio_info_present_flag) {
> +        flag(vui_aspect_ratio_constant_flag);
> +        ub(8, vui_aspect_ratio_idc);
> +        if (current->vui_aspect_ratio_idc == 255) {
> +            ub(16, vui_sar_width);
> +            ub(16, vui_sar_height);
> +        }
> +    } else {
> +        infer(vui_aspect_ratio_constant_flag, 0);
> +        infer(vui_aspect_ratio_idc, 0);
> +    }
> +    flag(vui_overscan_info_present_flag);
> +    if (current->vui_overscan_info_present_flag)
> +        flag(vui_overscan_appropriate_flag);
> +    flag(vui_colour_description_present_flag);
> +    if (current->vui_colour_description_present_flag) {
> +        ub(8, vui_colour_primaries);
> +        av_log(ctx->log_ctx, AV_LOG_DEBUG, "vui_colour_primaries == %d \n",
> +               current->vui_colour_primaries);
> +        ub(8, vui_transfer_characteristics);
> +        av_log(ctx->log_ctx, AV_LOG_DEBUG,
> +               "vui_transfer_characteristics == %d \n",
> +               current->vui_transfer_characteristics);
> +        ub(8, vui_matrix_coeffs);
> +        av_log(ctx->log_ctx, AV_LOG_DEBUG, "vui_matrix_coeffs == %d \n",
> +               current->vui_matrix_coeffs);
> +        flag(vui_full_range_flag);
> +    } else {
> +        infer(vui_colour_primaries, 2);
> +        infer(vui_transfer_characteristics, 2);
> +        infer(vui_matrix_coeffs, 2);
> +        infer(vui_full_range_flag, 0);
> +    }
> +    flag(vui_chroma_loc_info_present_flag);
> +    if (chroma_format_idc != 1 && current->vui_chroma_loc_info_present_flag) {
> +        av_log(ctx->log_ctx, AV_LOG_ERROR, "chroma_format_idc == %d,"
> +               "vui_chroma_loc_info_present_flag can't not be true",
> +               chroma_format_idc);
> +        return AVERROR_INVALIDDATA;
> +    }
> +    if (current->vui_chroma_loc_info_present_flag) {
> +        if (current->vui_progressive_source_flag &&
> +            !current->vui_interlaced_source_flag) {
> +            ue(vui_chroma_sample_loc_type_frame, 0, 6);
> +        } else {
> +            ue(vui_chroma_sample_loc_type_top_field, 0, 6);
> +            ue(vui_chroma_sample_loc_type_bottom_field, 0, 6);
> +        }
> +    } else {
> +        if (chroma_format_idc == 1) {
> +            infer(vui_chroma_sample_loc_type_frame, 6);
> +            infer(vui_chroma_sample_loc_type_top_field,
> +                  current->vui_chroma_sample_loc_type_frame);
> +            infer(vui_chroma_sample_loc_type_bottom_field,
> +                  current->vui_chroma_sample_loc_type_frame);
> +        }
> +    }
> +    return 0;
> +}
> +
> +static int FUNC(payload_extension) (CodedBitstreamContext *ctx, RWContext *rw,
> +                                    H266RawExtensionData *current,
> +                                    uint32_t payload_size, int cur_pos)
> +{
> +    int err;
> +    size_t byte_length, k;
> +
> +#ifdef READ
> +    GetBitContext tmp;
> +    int bits_left, payload_zero_bits;
> +
> +    if (!cbs_h265_payload_extension_present(rw, payload_size, cur_pos))
> +        return 0;
> +
> +    bits_left = 8 * payload_size - cur_pos;
> +    tmp = *rw;
> +    if (bits_left > 8)
> +        skip_bits_long(&tmp, bits_left - 8);
> +    payload_zero_bits = get_bits(&tmp, FFMIN(bits_left, 8));
> +    if (!payload_zero_bits)
> +        return AVERROR_INVALIDDATA;
> +    payload_zero_bits = ff_ctz(payload_zero_bits);
> +    current->bit_length = bits_left - payload_zero_bits - 1;
> +    allocate(current->data, (current->bit_length + 7) / 8);
> +#endif
> +
> +    byte_length = (current->bit_length + 7) / 8;
> +    for (k = 0; k < byte_length; k++) {
> +        int length = FFMIN(current->bit_length - k * 8, 8);
> +        xu(length, reserved_payload_extension_data, current->data[k],
> +           0, MAX_UINT_BITS(length), 0);
> +    }
> +
> +    return 0;
> +}
> +
> +static int FUNC(vui_payload) (CodedBitstreamContext *ctx, RWContext *rw,
> +                              H266RawVUI *current, uint16_t vui_payload_size,
> +                              uint8_t chroma_format_idc)
> +{
> +    int err;
> +    int start_position, current_position;
> +
> +    start_position = bit_position(rw);
> +    CHECK(FUNC(vui_parameters) (ctx, rw, current, chroma_format_idc));
> +    current_position = bit_position(rw) - start_position;
> +
> +    if (current_position < 8 * vui_payload_size) {
> +        CHECK(FUNC(payload_extension) (ctx, rw, &current->extension_data,
> +                                       vui_payload_size, current_position));
> +        fixed(1, vui_payload_bit_equal_to_one, 1);
> +        while (byte_alignment(rw) != 0)
> +            fixed(1, vui_payload_bit_equal_to_zero, 0);
> +    }
> +    return 0;
> +}
> +
> +static int FUNC(extension_data) (CodedBitstreamContext *ctx, RWContext *rw,
> +                                 H266RawExtensionData *current)
> +{
> +    int err;
> +    size_t k;
> +#ifdef READ
> +    GetBitContext start;
> +    uint8_t bit;
> +    start = *rw;
> +    for (k = 0; cbs_h2645_read_more_rbsp_data(rw); k++)
> +        skip_bits(rw, 1);
> +    current->bit_length = k;
> +    if (k > 0) {
> +        *rw = start;
> +        allocate(current->data, (current->bit_length + 7) / 8);
> +        for (k = 0; k < current->bit_length; k++) {
> +            xu(1, extension_data, bit, 0, 1, 0);
> +            current->data[k / 8] |= bit << (7 - k % 8);
> +        }
> +    }
> +#else
> +    for (k = 0; k < current->bit_length; k++)
> +        xu(1, extension_data, current->data[k / 8] >> (7 - k % 8) & 1, 0, 1, 0);
> +#endif
> +    return 0;
> +}
> +
> +static int FUNC(dpb_parameters) (CodedBitstreamContext *ctx, RWContext *rw,
> +                                 H266DpbParameters *current,
> +                                 uint8_t max_sublayers_minus1,
> +                                 uint8_t sublayer_info_flag)
> +{
> +    int err, i;
> +    for (i = (sublayer_info_flag ? 0 : max_sublayers_minus1);
> +         i <= max_sublayers_minus1; i++) {
> +        ues(dpb_max_dec_pic_buffering_minus1[i], 0, VVC_MAX_DPB_SIZE - 1, 1, i);
> +        ues(dpb_max_num_reorder_pics[i],
> +            0, current->dpb_max_dec_pic_buffering_minus1[i], 1, i);
> +        ues(dpb_max_latency_increase_plus1[i], 0, UINT32_MAX - 1, 1, i);
> +    }
> +    return 0;
> +}
> +
> +static int FUNC(ref_pic_list_struct) (CodedBitstreamContext *ctx,
> +                                      RWContext *rw,
> +                                      H266RefPicListStruct *current,
> +                                      uint8_t list_idx, uint8_t rpls_idx,
> +                                      const H266RawSPS *sps)
> +{
> +    CodedBitstreamH266Context *h266 = ctx->priv_data;
> +    int err, i, j, general_layer_idx = -1, num_direct_ref_layers = 0;
> +    const H266RawVPS *vps = h266->vps[sps->sps_video_parameter_set_id];
> +
> +    if (!vps) {
> +        av_log(ctx->log_ctx, AV_LOG_ERROR,
> +               "VPS id %d not available.\n", sps->sps_video_parameter_set_id);
> +        return AVERROR_INVALIDDATA;
> +    }
> +    //7.4.3.3 (29)
> +    for (i = 0; i <= vps->vps_max_layers_minus1; i++) {
> +        if (sps->nal_unit_header.nuh_layer_id == vps->vps_layer_id[i]) {
> +            general_layer_idx = i;
> +            break;
> +        }
> +    }
> +    if (general_layer_idx < 0) {
> +        av_log(ctx->log_ctx, AV_LOG_ERROR, "vps_layer_id %d not available.\n",
> +               sps->nal_unit_header.nuh_layer_id);
> +        return AVERROR_INVALIDDATA;
> +    }
> +    //7.4.3.3 (28)
> +    for (j = 0; j <= vps->vps_max_layers_minus1; j++) {
> +        if (vps->vps_direct_ref_layer_flag[general_layer_idx][j])
> +            num_direct_ref_layers++;
> +    }
> +
> +    ue(num_ref_entries, 0, VVC_MAX_REF_ENTRIES);
> +    if (sps->sps_long_term_ref_pics_flag &&
> +        rpls_idx < sps->sps_num_ref_pic_lists[list_idx] &&
> +        current->num_ref_entries > 0)
> +        flag(ltrp_in_header_flag);
> +    if (sps->sps_long_term_ref_pics_flag &&
> +        rpls_idx == sps->sps_num_ref_pic_lists[list_idx])
> +        infer(ltrp_in_header_flag, 1);
> +    for (i = 0, j = 0; i < current->num_ref_entries; i++) {
> +        if (sps->sps_inter_layer_prediction_enabled_flag)
> +            flags(inter_layer_ref_pic_flag[i], 1, i);
> +        else
> +            infer(inter_layer_ref_pic_flag[i], 0);
> +
> +        if (!current->inter_layer_ref_pic_flag[i]) {
> +            if (sps->sps_long_term_ref_pics_flag)
> +                flags(st_ref_pic_flag[i], 1, i);
> +            else
> +                infer(st_ref_pic_flag[i], 1);
> +            if (current->st_ref_pic_flag[i]) {
> +                int abs_delta_poc_st;
> +                ues(abs_delta_poc_st[i], 0, MAX_UINT_BITS(15), 1, i);
> +                if ((sps->sps_weighted_pred_flag ||
> +                     sps->sps_weighted_bipred_flag) && i != 0)
> +                    abs_delta_poc_st = current->abs_delta_poc_st[i];
> +                else
> +                    abs_delta_poc_st = current->abs_delta_poc_st[i] + 1;
> +                if (abs_delta_poc_st > 0)
> +                    flags(strp_entry_sign_flag[i], 1, i);
> +            } else {
> +                if (!current->ltrp_in_header_flag) {
> +                    uint8_t bits = sps->sps_log2_max_pic_order_cnt_lsb_minus4 + 4;
> +                    ubs(bits, rpls_poc_lsb_lt[j], 1, j);
> +                    j++;
> +                }
> +            }
> +        } else {
> +            if (num_direct_ref_layers == 0) {
> +                av_log(ctx->log_ctx, AV_LOG_ERROR,
> +                       "num_direct_ref_layers needs > 0.\n");
> +                return AVERROR_INVALIDDATA;
> +            }
> +            ues(ilrp_idx[i], 0, num_direct_ref_layers - 1, 1, i);
> +        }
> +    }
> +    return 0;
> +}
> +
> +static int FUNC(ref_pic_lists) (CodedBitstreamContext *ctx, RWContext *rw,
> +                                const H266RawSPS *sps, const H266RawPPS *pps,
> +                                H266RefPicLists *current) {
> +    const H266RefPicListStruct * ref_list;
> +    int err, i, j, num_ltrp_entries;
> +    for (i = 0; i < 2; i++) {
> +        if (sps->sps_num_ref_pic_lists[i] > 0 &&
> +            (i == 0 || (i == 1 && pps->pps_rpl1_idx_present_flag))) {
> +            flags(rpl_sps_flag[i], 1, i);
> +        } else {
> +            if (sps->sps_num_ref_pic_lists[i] == 0) {
> +                infer(rpl_sps_flag[i], 0);
> +            } else {
> +                if (!pps->pps_rpl1_idx_present_flag && i == 1)
> +                    infer(rpl_sps_flag[1], current->rpl_sps_flag[0]);
> +            }
> +        }
> +        if (current->rpl_sps_flag[i]) {
> +            if (sps->sps_num_ref_pic_lists[i] > 1 &&
> +                (i == 0 || (i == 1 && pps->pps_rpl1_idx_present_flag))) {
> +                uint8_t bits = av_ceil_log2(sps->sps_num_ref_pic_lists[i]);
> +                us(bits, rpl_idx[i], 0, sps->sps_num_ref_pic_lists[i] - 1, 1, i);
> +            } else if (sps->sps_num_ref_pic_lists[i] == 1) {
> +                infer(rpl_idx[i], 0);
> +            } else if (i == 1 && !pps->pps_rpl1_idx_present_flag) {
> +                infer(rpl_idx[1], current->rpl_idx[0]);
> +            } else {
> +                //how to handle this? or never happpend?
> +                av_log(ctx->log_ctx, AV_LOG_ERROR,
> +                       "can't infer the rpl_idx[i]\n");
> +                return AVERROR_PATCHWELCOME;
> +            }
> +            memcpy(&current->rpl_ref_list[i],
> +                   &sps->sps_ref_pic_list_struct[i][current->rpl_idx[i]],
> +                   sizeof(current->rpl_ref_list[i]));
> +        } else {
> +            CHECK(FUNC(ref_pic_list_struct) (ctx, rw, &current->rpl_ref_list[i],
> +                                             i, sps->sps_num_ref_pic_lists[i],
> +                                             sps));
> +        }
> +        ref_list = &current->rpl_ref_list[i];
> +
> +        num_ltrp_entries = 0;
> +        for (int i = 0; i < ref_list->num_ref_entries; i++) {
> +            if (!ref_list->inter_layer_ref_pic_flag[i]) {
> +                if (!ref_list->st_ref_pic_flag[i]) {
> +                    num_ltrp_entries++;
> +                }
> +            }
> +        }
> +
> +        for (j = 0; j < num_ltrp_entries; j++) {
> +            if (ref_list->ltrp_in_header_flag) {
> +                ubs(sps->sps_log2_max_pic_order_cnt_lsb_minus4 + 4,
> +                    poc_lsb_lt[i][j], 2, i, j);
> +            }
> +            flags(delta_poc_msb_cycle_present_flag[i][j], 2, i, j);
> +            if (current->delta_poc_msb_cycle_present_flag[i][j]) {
> +                uint32_t max =
> +                    1 << (32 - sps->sps_log2_max_pic_order_cnt_lsb_minus4 - 4);
> +                ues(delta_poc_msb_cycle_lt[i][j], 0, max, 2, i, j);
> +            }
> +        }
> +    }
> +    return 0;
> +}
> +
> +static int FUNC(general_timing_hrd_parameters)(CodedBitstreamContext *ctx,
> +                                    RWContext *rw,
> +                                    H266RawGeneralTimingHrdParameters *current)
> +{
> +    int err;
> +    ub(32, num_units_in_tick);
> +    u(32, time_scale, 1, MAX_UINT_BITS(32));
> +    flag(general_nal_hrd_params_present_flag);
> +    flag(general_vcl_hrd_params_present_flag);
> +
> +    if (current->general_nal_hrd_params_present_flag ||
> +        current->general_vcl_hrd_params_present_flag) {
> +        flag(general_same_pic_timing_in_all_ols_flag);
> +        flag(general_du_hrd_params_present_flag);
> +        if (current->general_du_hrd_params_present_flag)
> +            ub(8, tick_divisor_minus2);
> +        ub(4, bit_rate_scale);
> +        ub(4, cpb_size_scale);
> +        if (current->general_du_hrd_params_present_flag)
> +            ub(4, cpb_size_du_scale);
> +        ue(hrd_cpb_cnt_minus1, 0, 31);
> +    } else {
> +        //infer general_same_pic_timing_in_all_ols_flag?
> +        infer(general_du_hrd_params_present_flag, 0);
> +    }
> +    return 0;
> +}
> +
> +static int FUNC(sublayer_hrd_parameters) (CodedBitstreamContext *ctx,
> +                              RWContext *rw,
> +                              H266RawSubLayerHRDParameters *current,
> +                              int sublayer_id,
> +                              const H266RawGeneralTimingHrdParameters *general)
> +{
> +    int err, i;
> +    for (i = 0; i <= general->hrd_cpb_cnt_minus1; i++) {
> +        ues(bit_rate_value_minus1[sublayer_id][i], 0, UINT32_MAX - 1, 2,
> +            sublayer_id, i);
> +        ues(cpb_size_value_minus1[sublayer_id][i], 0, UINT32_MAX - 1, 2,
> +            sublayer_id, i);
> +        if (general->general_du_hrd_params_present_flag) {
> +            ues(cpb_size_du_value_minus1[sublayer_id][i],
> +                0, UINT32_MAX - 1, 2, sublayer_id, i);
> +            ues(bit_rate_du_value_minus1[sublayer_id][i],
> +                0, UINT32_MAX - 1, 2, sublayer_id, i);
> +        }
> +        flags(cbr_flag[sublayer_id][i], 2, sublayer_id, i);
> +    }
> +    return 0;
> +}
> +
> +static int FUNC(ols_timing_hrd_parameters) (CodedBitstreamContext *ctx,
> +                RWContext *rw, H266RawOlsTimingHrdParameters *current,
> +                uint8_t first_sublayer, uint8_t max_sublayers_minus1,
> +                const H266RawGeneralTimingHrdParameters *general)
> +{
> +    int err, i;
> +    for (i = first_sublayer; i <= max_sublayers_minus1; i++) {
> +        flags(fixed_pic_rate_general_flag[i], 1, i);
> +        if (!current->fixed_pic_rate_general_flag[i])
> +            flags(fixed_pic_rate_within_cvs_flag[i], 1, i);
> +        else
> +            infer(fixed_pic_rate_within_cvs_flag[i], 1);
> +        if (current->fixed_pic_rate_within_cvs_flag[i]) {
> +            ues(elemental_duration_in_tc_minus1[i], 0, 2047, 1, i);
> +            infer(low_delay_hrd_flag[i], 0);
> +        } else if ((general->general_nal_hrd_params_present_flag ||
> +                    general->general_vcl_hrd_params_present_flag) &&
> +                   general->hrd_cpb_cnt_minus1 == 0) {
> +            flags(low_delay_hrd_flag[i], 1, i);
> +        } else {
> +            infer(low_delay_hrd_flag[i], 0);
> +        }
> +        if (general->general_nal_hrd_params_present_flag)
> +            CHECK(FUNC(sublayer_hrd_parameters) (ctx, rw,
> +                                        &current->nal_sub_layer_hrd_parameters,
> +                                        i, general));
> +        if (general->general_vcl_hrd_params_present_flag)
> +            CHECK(FUNC(sublayer_hrd_parameters) (ctx, rw,
> +                                        &current->nal_sub_layer_hrd_parameters,
> +                                        i, general));
> +    }
> +    return 0;
> +}
> +
> +static int FUNC(vps) (CodedBitstreamContext *ctx, RWContext *rw,
> +                     H266RawVPS *current)
> +{
> +    int err, i, j, k;
> +    uint16_t total_num_olss = 0;
> +    uint8_t ols_mode_idc = 0;
> +    uint16_t num_multi_layer_olss = 0;
> +    uint8_t layer_included_in_ols_flag[VVC_MAX_TOTAL_NUM_OLSS][VVC_MAX_LAYERS];
> +    uint8_t num_ref_layers[VVC_MAX_LAYERS];
> +    uint8_t reference_layer_idx[VVC_MAX_LAYERS][VVC_MAX_LAYERS];
> +
> +    HEADER("Video Parameter Set");
> +
> +    CHECK(FUNC(nal_unit_header) (ctx, rw,
> +                                 &current->nal_unit_header, VVC_VPS_NUT));
> +
> +    ub(4, vps_video_parameter_set_id);
> +    if (current->vps_video_parameter_set_id == 0) {
> +        av_log(ctx->log_ctx, AV_LOG_ERROR,
> +               "vps_video_parameter_set_id should > 0.\n");
> +        return AVERROR_INVALIDDATA;
> +    }
> +    ub(6, vps_max_layers_minus1);
> +    u(3, vps_max_sublayers_minus1, 0, 6);
> +    if (current->vps_max_layers_minus1 > 0
> +        && current->vps_max_sublayers_minus1 > 0)
> +        flag(vps_default_ptl_dpb_hrd_max_tid_flag);
> +    else
> +        infer(vps_default_ptl_dpb_hrd_max_tid_flag, 1);
> +
> +    if (current->vps_max_layers_minus1 > 0)
> +        flag(vps_all_independent_layers_flag);
> +    else
> +        infer(vps_all_independent_layers_flag, 1);
> +
> +    for (i = 0; i <= current->vps_max_layers_minus1; i++) {
> +        ubs(6, vps_layer_id[i], 1, i);
> +        if (i > 0 && current->vps_layer_id[i] <= current->vps_layer_id[i - 1]) {
> +            av_log(ctx->log_ctx, AV_LOG_ERROR,
> +                   "vps_layer_id[%d](%d) should > vps_layer_id[%d](%d).\n",
> +                   i, current->vps_layer_id[i], i - 1,
> +                   current->vps_layer_id[i - 1]);
> +            return AVERROR_INVALIDDATA;
> +        }
> +        if (i > 0 && !current->vps_all_independent_layers_flag) {
> +            flags(vps_independent_layer_flag[i], 1, i);
> +            if (!current->vps_independent_layer_flag[i]) {
> +                flags(vps_max_tid_ref_present_flag[i], 1, i);
> +                for (j = 0; j < i; j++) {
> +                    flags(vps_direct_ref_layer_flag[i][j], 2, i, j);
> +                    if (current->vps_max_tid_ref_present_flag[i] &&
> +                        current->vps_direct_ref_layer_flag[i][j]) {
> +                        ubs(3, vps_max_tid_il_ref_pics_plus1[i][j], 2, i, j);
> +                    } else {
> +                        infer(vps_max_tid_il_ref_pics_plus1[i][j],
> +                              current->vps_max_sublayers_minus1 + 1);
> +                    }
> +                }
> +            } else {
> +                for (j = 0; j < i; j++) {
> +                    infer(vps_direct_ref_layer_flag[i][j], 0);
> +                }
> +            }
> +        } else {
> +            infer(vps_independent_layer_flag[i], 1);
> +            for (j = 0; j < i; j++) {
> +                infer(vps_direct_ref_layer_flag[i][j], 0);
> +            }
> +        }
> +    }
> +
> +    if (current->vps_max_layers_minus1 > 0) {
> +        if (current->vps_all_independent_layers_flag)
> +            flag(vps_each_layer_is_an_ols_flag);
> +        else
> +            infer(vps_each_layer_is_an_ols_flag, 0);
> +        if (!current->vps_each_layer_is_an_ols_flag) {
> +            if (!current->vps_all_independent_layers_flag)
> +                ub(2, vps_ols_mode_idc);
> +            else
> +                infer(vps_ols_mode_idc, 2);
> +            if (current->vps_ols_mode_idc == 2) {
> +                ub(8, vps_num_output_layer_sets_minus2);
> +                for (i = 1; i <= current->vps_num_output_layer_sets_minus2 + 1;
> +                     i++)
> +                    for (j = 0; j <= current->vps_max_layers_minus1; j++)
> +                        flags(vps_ols_output_layer_flag[i][j], 2, i, j);
> +            }
> +            ols_mode_idc = current->vps_ols_mode_idc;
> +        } else {
> +            ols_mode_idc = 4;
> +        }
> +        if (ols_mode_idc == 4 || ols_mode_idc == 0 || ols_mode_idc == 1)
> +            total_num_olss = current->vps_max_layers_minus1 + 1;
> +        else if (ols_mode_idc = 2)
> +            total_num_olss = current->vps_num_output_layer_sets_minus2 + 2;
> +        else
> +            av_log(ctx->log_ctx, AV_LOG_ERROR,
> +                   "ols_mode_idc == 3, patch welcome");
> +        u(8, vps_num_ptls_minus1, 0, total_num_olss - 1);
> +    } else {
> +        infer(vps_each_layer_is_an_ols_flag, 1);
> +        infer(vps_num_ptls_minus1, 0);
> +    }
> +    {
> +        //calc NumMultiLayerOlss
> +        int m;
> +        uint8_t dependency_flag[VVC_MAX_LAYERS][VVC_MAX_LAYERS];
> +        uint16_t num_output_layers_in_ols[VVC_MAX_TOTAL_NUM_OLSS];
> +        uint8_t num_sub_layers_in_layer_in_ols[VVC_MAX_TOTAL_NUM_OLSS][VVC_MAX_TOTAL_NUM_OLSS];
> +        uint8_t output_layer_idx[VVC_MAX_TOTAL_NUM_OLSS][VVC_MAX_LAYERS];
> +
> +        //7.4.3.3 vps_direct_ref_layer_flag section
> +        for (i = 0; i <= current->vps_max_layers_minus1; i++) {
> +            for (j = 0; j <= current->vps_max_layers_minus1; j++) {
> +                dependency_flag[i][j] = current->vps_direct_ref_layer_flag[i][j];
> +                for (k = 0; k < i; k++) {
> +                    if (current->vps_direct_ref_layer_flag[i][k] &&
> +                        dependency_flag[k][j])
> +                        dependency_flag[i][j] = 1;
> +                }
> +            }
> +        }
> +        for (i = 0; i <= current->vps_max_layers_minus1; i++) {
> +            int r;
> +            for (j = 0, r = 0; j <= current->vps_max_layers_minus1; j++) {
> +                if (dependency_flag[i][j])
> +                    reference_layer_idx[i][r++] = j;
> +            }
> +            num_ref_layers[i] = r;
> +        }
> +
> +        //7.4.3.3 vps_ols_output_layer_flag section
> +        num_output_layers_in_ols[0] = 1;
> +        num_sub_layers_in_layer_in_ols[0][0] =
> +            current->vps_ptl_max_tid[current->vps_ols_ptl_idx[0]] + 1;
> +        for (i = 1; i < total_num_olss; i++) {
> +            if (ols_mode_idc == 4 || ols_mode_idc == 0) {
> +                num_output_layers_in_ols[i] = 1;
> +                if (current->vps_each_layer_is_an_ols_flag) {
> +                    num_sub_layers_in_layer_in_ols[i][0] =
> +                        current->vps_ptl_max_tid[current->vps_ols_ptl_idx[i]] + 1;
> +                } else {
> +                    num_sub_layers_in_layer_in_ols[i][i] =
> +                        current->vps_ptl_max_tid[current->vps_ols_ptl_idx[i]] + 1;
> +                    for (k = i - 1; k >= 0; k--) {
> +                        num_sub_layers_in_layer_in_ols[i][k] = 0;
> +                        for (m = k + 1; m <= i; m++) {
> +                            uint8_t max_sublayer_needed =
> +                                FFMIN(num_sub_layers_in_layer_in_ols[i][m],
> +                                      current->vps_max_tid_il_ref_pics_plus1[m][k]);
> +                            if (current->vps_direct_ref_layer_flag[m][k] &&
> +                                num_sub_layers_in_layer_in_ols[i][k] < max_sublayer_needed)
> +                                num_sub_layers_in_layer_in_ols[i][k] = max_sublayer_needed;
> +                        }
> +                    }
> +                }
> +            } else if (current->vps_ols_mode_idc == 1) {
> +                num_output_layers_in_ols[i] = i + 1;
> +                for (j = 0; j < num_output_layers_in_ols[i]; j++) {
> +                    num_sub_layers_in_layer_in_ols[i][j] =
> +                        current->vps_ptl_max_tid[current->vps_ols_ptl_idx[i]] + 1;
> +                }
> +            } else if (current->vps_ols_mode_idc == 2) {
> +                uint8_t highest_included_layer = 0;
> +                for (j = 0; j <= current->vps_max_layers_minus1; j++) {
> +                    layer_included_in_ols_flag[i][j] = 0;
> +                    num_sub_layers_in_layer_in_ols[i][j] = 0;
> +                }
> +                for (k = 0, j = 0; k <= current->vps_max_layers_minus1; k++) {
> +                    if (current->vps_ols_output_layer_flag[i][k]) {
> +                        layer_included_in_ols_flag[i][k] = 1;
> +                        highest_included_layer = k;
> +                        output_layer_idx[i][j] = k;
> +                        num_sub_layers_in_layer_in_ols[i][k] =
> +                            current->vps_ptl_max_tid[current->
> +                                                     vps_ols_ptl_idx[i]] + 1;
> +                        j++;
> +                    }
> +                }
> +                num_output_layers_in_ols[i] = j;
> +                for (j = 0; j < num_output_layers_in_ols[i]; j++) {
> +                    int idx = output_layer_idx[i][j];
> +                    for (k = 0; k < num_ref_layers[idx]; k++) {
> +                        if (!layer_included_in_ols_flag[i][reference_layer_idx[idx][k]])
> +                            layer_included_in_ols_flag[i][reference_layer_idx[idx][k]] = 1;
> +                    }
> +                }
> +                for (k = highest_included_layer - 1; k >= 0; k--) {
> +                    if (layer_included_in_ols_flag[i][k] &&
> +                        !current->vps_ols_output_layer_flag[i][k]) {
> +                        for (m = k + 1; m <= highest_included_layer; m++) {
> +                            uint8_t max_sublayer_needed =
> +                                FFMIN(num_sub_layers_in_layer_in_ols[i][m],
> +                                      current->vps_max_tid_il_ref_pics_plus1[m][k]);
> +                            if (current->vps_direct_ref_layer_flag[m][k] &&
> +                                layer_included_in_ols_flag[i][m] &&
> +                                num_sub_layers_in_layer_in_ols[i][k] <
> +                                max_sublayer_needed)
> +                                num_sub_layers_in_layer_in_ols[i][k] =
> +                                    max_sublayer_needed;
> +                        }
> +                    }
> +                }
> +            }
> +        }
> +        for (i = 1; i < total_num_olss; i++) {
> +            int num_layers_in_ols = 0;
> +            if (current->vps_each_layer_is_an_ols_flag) {
> +                num_layers_in_ols = 1;
> +            } else if (current->vps_ols_mode_idc == 0 ||
> +                       current->vps_ols_mode_idc == 1) {
> +                num_layers_in_ols = i + 1;
> +            } else if (current->vps_ols_mode_idc == 2) {
> +                for (k = 0, j = 0; k <= current->vps_max_layers_minus1; k++) {
> +                    if (layer_included_in_ols_flag[i][k])
> +                        j++;
> +                    num_layers_in_ols = j;
> +                }
> +            }
> +            if (num_layers_in_ols > 1) {
> +                num_multi_layer_olss++;
> +            }
> +        }
> +    }
> +
> +    for (i = 0; i <= current->vps_num_ptls_minus1; i++) {
> +        if (i > 0)
> +            flags(vps_pt_present_flag[i], 1, i);
> +        else
> +            infer(vps_pt_present_flag[i], 1);
> +
> +        if (!current->vps_default_ptl_dpb_hrd_max_tid_flag)
> +            us(3, vps_ptl_max_tid[i], 0, current->vps_max_sublayers_minus1, 1, i);
> +        else
> +            infer(vps_ptl_max_tid[i], current->vps_max_sublayers_minus1);
> +    }
> +    while (byte_alignment(rw) != 0)
> +        fixed(1, vps_ptl_alignment_zero_bit, 0);
> +    for (i = 0; i <= current->vps_num_ptls_minus1; i++) {
> +        CHECK(FUNC(profile_tier_level) (ctx, rw,
> +                                        current->vps_profile_tier_level + i,
> +                                        current->vps_pt_present_flag[i],
> +                                        current->vps_ptl_max_tid[i]));
> +    }
> +    for (i = 0; i < total_num_olss; i++) {
> +        if (current->vps_num_ptls_minus1 > 0 &&
> +            current->vps_num_ptls_minus1 + 1 != total_num_olss) {
> +            us(8, vps_ols_ptl_idx[i], 0, current->vps_num_ptls_minus1, 1, i);
> +        } else if (current->vps_num_ptls_minus1 == 0) {
> +            infer(vps_ols_ptl_idx[i], 0);
> +        } else {
> +            infer(vps_ols_ptl_idx[i], i);
> +        }
> +    }
> +
> +    if (!current->vps_each_layer_is_an_ols_flag) {
> +        uint16_t vps_num_dpb_params;
> +        ue(vps_num_dpb_params_minus1, 0, num_multi_layer_olss - 1);
> +        if (current->vps_each_layer_is_an_ols_flag)
> +            vps_num_dpb_params = 0;
> +        else
> +            vps_num_dpb_params = current->vps_num_dpb_params_minus1 + 1;
> +
> +        if (current->vps_max_sublayers_minus1 > 0)
> +            flag(vps_sublayer_dpb_params_present_flag);
> +        else
> +            infer(vps_sublayer_dpb_params_present_flag, 0);
> +
> +        for (i = 0; i < vps_num_dpb_params; i++) {
> +            if (!current->vps_default_ptl_dpb_hrd_max_tid_flag)
> +                us(3, vps_dpb_max_tid[i], 0, current->vps_max_sublayers_minus1,
> +                   1, i);
> +            else
> +                infer(vps_dpb_max_tid[i], current->vps_max_sublayers_minus1);
> +            CHECK(FUNC(dpb_parameters) (ctx, rw, current->vps_dpb_params + i,
> +                                        current->vps_dpb_max_tid[i],
> +                                        current->
> +                                        vps_sublayer_dpb_params_present_flag));
> +        }
> +        for (i = 0; i < num_multi_layer_olss; i++) {
> +            ues(vps_ols_dpb_pic_width[i], 0, UINT16_MAX, 1, i);
> +            ues(vps_ols_dpb_pic_height[i], 0, UINT16_MAX, 1, i);
> +            ubs(2, vps_ols_dpb_chroma_format[i], 1, i);
> +            ues(vps_ols_dpb_bitdepth_minus8[i], 0, 2, 1, i);
> +            if (vps_num_dpb_params > 1
> +                && vps_num_dpb_params != num_multi_layer_olss)
> +                ues(vps_ols_dpb_params_idx[i], 0, vps_num_dpb_params - 1, 1, i);
> +            else if (vps_num_dpb_params == 1)
> +                infer(vps_ols_dpb_params_idx[i], 0);
> +            else
> +                infer(vps_ols_dpb_params_idx[i], i);
> +        }
> +        flag(vps_timing_hrd_params_present_flag);
> +        if (current->vps_timing_hrd_params_present_flag) {
> +            CHECK(FUNC(general_timing_hrd_parameters) (ctx, rw,
> +                                                       &current->
> +                                                       vps_general_timing_hrd_parameters));
> +            if (current->vps_max_sublayers_minus1 > 0)
> +                flag(vps_sublayer_cpb_params_present_flag);
> +            else
> +                infer(vps_sublayer_cpb_params_present_flag, 0);
> +            ue(vps_num_ols_timing_hrd_params_minus1, 0,
> +               num_multi_layer_olss - 1);
> +            for (i = 0; i <= current->vps_num_ols_timing_hrd_params_minus1; i++) {
> +                uint8_t first_sublayer;
> +                if (!current->vps_default_ptl_dpb_hrd_max_tid_flag)
> +                    us(3, vps_hrd_max_tid[i], 0,
> +                       current->vps_max_sublayers_minus1, 1, i);
> +                else
> +                    infer(vps_hrd_max_tid[i],
> +                          current->vps_max_sublayers_minus1);
> +                first_sublayer = current->vps_sublayer_cpb_params_present_flag ?
> +                                 0 : current->vps_hrd_max_tid[i];
> +                CHECK(FUNC(ols_timing_hrd_parameters)
> +                      (ctx, rw, &current->vps_ols_timing_hrd_parameters,
> +                       first_sublayer, current->vps_max_sublayers_minus1,
> +                       &current->vps_general_timing_hrd_parameters));
> +
> +            }
> +            if (current->vps_num_ols_timing_hrd_params_minus1 > 0 &&
> +                current->vps_num_ols_timing_hrd_params_minus1 + 1 !=
> +                num_multi_layer_olss) {
> +                for (i = 0; i < num_multi_layer_olss; i++) {
> +                    ues(vps_ols_timing_hrd_idx[i], 0,
> +                        current->vps_num_ols_timing_hrd_params_minus1, 1, i);
> +                }
> +            } else if (current->vps_num_ols_timing_hrd_params_minus1 == 0) {
> +                for (i = 0; i < num_multi_layer_olss; i++)
> +                    infer(vps_ols_timing_hrd_idx[i], 0);
> +            } else {
> +                for (i = 0; i < num_multi_layer_olss; i++)
> +                    infer(vps_ols_timing_hrd_idx[i], i);
> +            }
> +        }
> +    }
> +
> +    flag(vps_extension_flag);
> +    if (current->vps_extension_flag)
> +        CHECK(FUNC(extension_data) (ctx, rw, &current->extension_data));
> +    CHECK(FUNC(rbsp_trailing_bits) (ctx, rw));
> +
> +    return 0;
> +}
> +
> +
> +static int FUNC(sps)(CodedBitstreamContext *ctx, RWContext *rw,
> +                     H266RawSPS *current)
> +{
> +    CodedBitstreamH266Context *h266 = ctx->priv_data;
> +    int err, i, j;
> +    unsigned int ctb_log2_size_y, min_cb_log2_size_y,
> +                 min_qt_log2_size_intra_y, min_qt_log2_size_inter_y,
> +                 ctb_size_y, max_num_merge_cand, tmp_width_val, tmp_height_val;
> +    uint8_t qp_bd_offset;
> +
> +    static const uint8_t h266_sub_width_c[] = {
> +        1, 2, 2, 1
> +    };
> +    static const uint8_t h266_sub_height_c[] = {
> +        1, 2, 1, 1
> +    };
> +
> +    HEADER("Sequence Parameter Set");
> +
> +    CHECK(FUNC(nal_unit_header) (ctx, rw,
> +                                 &current->nal_unit_header, VVC_SPS_NUT));
> +
> +    ub(4, sps_seq_parameter_set_id);
> +    ub(4, sps_video_parameter_set_id);
> +    if (current->sps_video_parameter_set_id == 0 && !h266->vps_ref[0]) {
> +        H266RawVPS *vps;
> +        AVBufferRef *ref = av_buffer_allocz(sizeof(H266RawVPS));
> +        if (!ref) {
> +            return AVERROR(ENOMEM);
> +        }
> +        vps = (H266RawVPS *) ref->data;
> +        vps->vps_max_layers_minus1 = 0;
> +        vps->vps_independent_layer_flag[0] = 1;
> +        vps->vps_layer_id[0] = current->nal_unit_header.nuh_layer_id;
> +        h266->vps_ref[0] = ref;
> +        h266->vps[0] = vps;
> +    }
> +
> +    u(3, sps_max_sublayers_minus1, 0, VVC_MAX_SUBLAYERS - 1);
> +    u(2, sps_chroma_format_idc, 0, 3);
> +    u(2, sps_log2_ctu_size_minus5, 0, 3);
> +    ctb_log2_size_y = current->sps_log2_ctu_size_minus5 + 5;
> +    ctb_size_y = 1 << ctb_log2_size_y;
> +
> +    flag(sps_ptl_dpb_hrd_params_present_flag);
> +    if (current->sps_ptl_dpb_hrd_params_present_flag) {
> +        CHECK(FUNC(profile_tier_level) (ctx, rw, &current->profile_tier_level,
> +                                        1, current->sps_max_sublayers_minus1));
> +    }
> +    flag(sps_gdr_enabled_flag);
> +    flag(sps_ref_pic_resampling_enabled_flag);
> +    if (current->sps_ref_pic_resampling_enabled_flag)
> +        flag(sps_res_change_in_clvs_allowed_flag);
> +    else
> +        infer(sps_res_change_in_clvs_allowed_flag, 0);
> +
> +    ue(sps_pic_width_max_in_luma_samples, 1, VVC_MAX_WIDTH);
> +    ue(sps_pic_height_max_in_luma_samples, 1, VVC_MAX_HEIGHT);
> +
> +    flag(sps_conformance_window_flag);
> +    if (current->sps_conformance_window_flag) {
> +        uint8_t sub_width_c = h266_sub_width_c[current->sps_chroma_format_idc];
> +        uint8_t sub_height_c = h266_sub_height_c[current->sps_chroma_format_idc];
> +        uint16_t width = current->sps_pic_width_max_in_luma_samples / sub_width_c;
> +        uint16_t height = current->sps_pic_height_max_in_luma_samples / sub_height_c;
> +        ue(sps_conf_win_left_offset, 0, width);
> +        ue(sps_conf_win_right_offset, 0, width - current->sps_conf_win_left_offset);
> +        ue(sps_conf_win_top_offset, 0, height);
> +        ue(sps_conf_win_bottom_offset, 0, height - current->sps_conf_win_top_offset);
> +    } else {
> +        infer(sps_conf_win_left_offset, 0);
> +        infer(sps_conf_win_right_offset, 0);
> +        infer(sps_conf_win_top_offset, 0);
> +        infer(sps_conf_win_bottom_offset, 0);
> +    }
> +
> +    tmp_width_val =
> +            h266_ceil(current->sps_pic_width_max_in_luma_samples, ctb_size_y);
> +    tmp_height_val =
> +            h266_ceil(current->sps_pic_height_max_in_luma_samples, ctb_size_y);
> +
> +    flag(sps_subpic_info_present_flag);
> +    if (current->sps_subpic_info_present_flag) {
> +        ue(sps_num_subpics_minus1, 1, VVC_MAX_SLICES - 1);
> +        if (current->sps_num_subpics_minus1 > 0) {
> +            flag(sps_independent_subpics_flag);
> +            flag(sps_subpic_same_size_flag);
> +        }
> +
> +        if (current->sps_num_subpics_minus1 > 0) {
> +            int wlen = av_ceil_log2(tmp_width_val);
> +            int hlen = av_ceil_log2(tmp_height_val);
> +            if (current->sps_pic_width_max_in_luma_samples > ctb_size_y)
> +                ubs(wlen, sps_subpic_width_minus1[0], 1, 0);
> +            else
> +                infer(sps_subpic_width_minus1[i], tmp_width_val - 1);
> +            if (current->sps_pic_height_max_in_luma_samples > ctb_size_y)
> +                ubs(hlen, sps_subpic_height_minus1[0], 1, 0);
> +            else
> +                infer(sps_subpic_height_minus1[0], tmp_height_val);
> +            if (!current->sps_independent_subpics_flag) {
> +                flags(sps_subpic_treated_as_pic_flag[0], 1, 0);
> +                flags(sps_loop_filter_across_subpic_enabled_flag[0], 1, 0);
> +            } else {
> +                infer(sps_subpic_treated_as_pic_flag[0], 1);
> +                infer(sps_loop_filter_across_subpic_enabled_flag[0], 1);
> +            }
> +            for (i = 1; i <= current->sps_num_subpics_minus1; i++) {
> +                if (!current->sps_subpic_same_size_flag) {
> +                    if (current->sps_pic_width_max_in_luma_samples > ctb_size_y)
> +                        ubs(wlen, sps_subpic_ctu_top_left_x[i], 1, i);
> +                    else
> +                        infer(sps_subpic_ctu_top_left_x[i], 0);
> +                    if (current->sps_pic_height_max_in_luma_samples >
> +                        ctb_size_y)
> +                        ubs(hlen, sps_subpic_ctu_top_left_y[i], 1, i);
> +                    else
> +                        infer(sps_subpic_ctu_top_left_y[i], 0);
> +                    if (i < current->sps_num_subpics_minus1 &&
> +                        current->sps_pic_width_max_in_luma_samples >
> +                        ctb_size_y) {
> +                        ubs(wlen, sps_subpic_width_minus1[i], 1, i);
> +                    } else {
> +                        infer(sps_subpic_width_minus1[i],
> +                              tmp_width_val -
> +                              current->sps_subpic_ctu_top_left_x[i] - 1);
> +                    }
> +                    if (i < current->sps_num_subpics_minus1 &&
> +                        current->sps_pic_height_max_in_luma_samples >
> +                        ctb_size_y) {
> +                        ubs(hlen, sps_subpic_height_minus1[i], 1, i);
> +                    } else {
> +                        infer(sps_subpic_height_minus1[i],
> +                              tmp_height_val -
> +                              current->sps_subpic_ctu_top_left_y[i] - 1);
> +                    }
> +                } else {
> +                    int num_subpic_cols = tmp_width_val /
> +                                     (current->sps_subpic_width_minus1[0] + 1);
> +                    infer(sps_subpic_ctu_top_left_x[i],
> +                          (i % num_subpic_cols) *
> +                          (current->sps_subpic_width_minus1[0] + 1));
> +                    infer(sps_subpic_ctu_top_left_y[i],
> +                          (i / num_subpic_cols) *
> +                          (current->sps_subpic_height_minus1[0] + 1));
> +                    infer(sps_subpic_width_minus1[i],
> +                          current->sps_subpic_width_minus1[0]);
> +                    infer(sps_subpic_height_minus1[i],
> +                          current->sps_subpic_height_minus1[0]);
> +                }
> +                if (!current->sps_independent_subpics_flag) {
> +                    flags(sps_subpic_treated_as_pic_flag[i], 1, i);
> +                    flags(sps_loop_filter_across_subpic_enabled_flag[i], 1, i);
> +                } else {
> +                    infer(sps_subpic_treated_as_pic_flag[i], 1);
> +                    infer(sps_loop_filter_across_subpic_enabled_flag[i], 0);
> +                }
> +            }
> +            ue(sps_subpic_id_len_minus1, 0, 15);
> +            if ((1 << (current->sps_subpic_id_len_minus1 + 1)) <
> +                current->sps_num_subpics_minus1 + 1) {
> +                av_log(ctx->log_ctx, AV_LOG_ERROR,
> +                       "sps_subpic_id_len_minus1(%d) is too small\n",
> +                       current->sps_subpic_id_len_minus1);
> +                return AVERROR_INVALIDDATA;
> +            }
> +            flag(sps_subpic_id_mapping_explicitly_signalled_flag);
> +            if (current->sps_subpic_id_mapping_explicitly_signalled_flag) {
> +                flag(sps_subpic_id_mapping_present_flag);
> +                if (current->sps_subpic_id_mapping_present_flag) {
> +                    for (i = 0; i <= current->sps_num_subpics_minus1; i++) {
> +                        ubs(current->sps_subpic_id_len_minus1 + 1,
> +                            sps_subpic_id[i], 1, i);
> +                    }
> +                }
> +            }
> +        } else {
> +            infer(sps_subpic_ctu_top_left_x[0], 0);
> +            infer(sps_subpic_ctu_top_left_y[0], 0);
> +            infer(sps_subpic_width_minus1[0], tmp_width_val - 1);
> +            infer(sps_subpic_height_minus1[0], tmp_height_val - 1);
> +        }
> +    } else {
> +        infer(sps_num_subpics_minus1, 0);
> +        infer(sps_independent_subpics_flag, 1);
> +        infer(sps_subpic_same_size_flag, 0);
> +        infer(sps_subpic_id_mapping_explicitly_signalled_flag, 0);
> +        infer(sps_subpic_ctu_top_left_x[0], 0);
> +        infer(sps_subpic_ctu_top_left_y[0], 0);
> +        infer(sps_subpic_width_minus1[0], tmp_width_val - 1);
> +        infer(sps_subpic_height_minus1[0], tmp_height_val - 1);
> +    }
> +
> +
> +    ue(sps_bitdepth_minus8, 0, 2);
> +    qp_bd_offset = 6 * current->sps_bitdepth_minus8;
> +
> +    flag(sps_entropy_coding_sync_enabled_flag);
> +    flag(sps_entry_point_offsets_present_flag);
> +
> +    u(4, sps_log2_max_pic_order_cnt_lsb_minus4, 0, 12);
> +    flag(sps_poc_msb_cycle_flag);
> +    if (current->sps_poc_msb_cycle_flag)
> +        ue(sps_poc_msb_cycle_len_minus1,
> +           0, 32 - current->sps_log2_max_pic_order_cnt_lsb_minus4 - 5);
> +
> +    u(2, sps_num_extra_ph_bytes, 0, 2);
> +    for (i = 0; i < (current->sps_num_extra_ph_bytes * 8); i++) {
> +        flags(sps_extra_ph_bit_present_flag[i], 1, i);
> +    }
> +
> +    u(2, sps_num_extra_sh_bytes, 0, 2);
> +    for (i = 0; i < (current->sps_num_extra_sh_bytes * 8); i++) {
> +        flags(sps_extra_sh_bit_present_flag[i], 1, i);
> +    }
> +
> +    if (current->sps_ptl_dpb_hrd_params_present_flag) {
> +        if (current->sps_max_sublayers_minus1 > 0)
> +            flag(sps_sublayer_dpb_params_flag);
> +        else
> +            infer(sps_sublayer_dpb_params_flag, 0);
> +        CHECK(FUNC(dpb_parameters) (ctx, rw, &current->sps_dpb_params,
> +                                    current->sps_max_sublayers_minus1,
> +                                    current->sps_sublayer_dpb_params_flag));
> +    }
> +
> +    ue(sps_log2_min_luma_coding_block_size_minus2,
> +       0, FFMIN(4, current->sps_log2_ctu_size_minus5 + 3));
> +    min_cb_log2_size_y =
> +        current->sps_log2_min_luma_coding_block_size_minus2 + 2;
> +
> +    flag(sps_partition_constraints_override_enabled_flag);
> +
> +    ue(sps_log2_diff_min_qt_min_cb_intra_slice_luma,
> +       0, FFMIN(6, ctb_log2_size_y) - min_cb_log2_size_y);
> +    min_qt_log2_size_intra_y =
> +        current->sps_log2_diff_min_qt_min_cb_intra_slice_luma +
> +        min_cb_log2_size_y;
> +
> +    ue(sps_max_mtt_hierarchy_depth_intra_slice_luma,
> +       0, 2 * (ctb_log2_size_y - min_cb_log2_size_y));
> +
> +    if (current->sps_max_mtt_hierarchy_depth_intra_slice_luma != 0) {
> +        ue(sps_log2_diff_max_bt_min_qt_intra_slice_luma,
> +           0, ctb_log2_size_y - min_qt_log2_size_intra_y);
> +        ue(sps_log2_diff_max_tt_min_qt_intra_slice_luma,
> +           0, FFMIN(6, ctb_log2_size_y) - min_qt_log2_size_intra_y);
> +    } else {
> +        infer(sps_log2_diff_max_bt_min_qt_intra_slice_luma, 0);
> +        infer(sps_log2_diff_max_tt_min_qt_intra_slice_luma, 0);
> +    }
> +
> +    if (current->sps_chroma_format_idc != 0) {
> +        flag(sps_qtbtt_dual_tree_intra_flag);
> +    } else {
> +        infer(sps_qtbtt_dual_tree_intra_flag, 0);
> +    }
> +
> +    if (current->sps_qtbtt_dual_tree_intra_flag) {
> +        ue(sps_log2_diff_min_qt_min_cb_intra_slice_chroma,
> +           0, FFMIN(6, ctb_log2_size_y) - min_cb_log2_size_y);
> +        ue(sps_max_mtt_hierarchy_depth_intra_slice_chroma,
> +           0, 2 * (ctb_log2_size_y - min_cb_log2_size_y));
> +        if (current->sps_max_mtt_hierarchy_depth_intra_slice_chroma != 0) {
> +            unsigned int min_qt_log2_size_intra_c =
> +                current->sps_log2_diff_min_qt_min_cb_intra_slice_chroma +
> +                min_cb_log2_size_y;
> +            ue(sps_log2_diff_max_bt_min_qt_intra_slice_chroma,
> +               0, FFMIN(6, ctb_log2_size_y) - min_qt_log2_size_intra_c);
> +            ue(sps_log2_diff_max_tt_min_qt_intra_slice_chroma,
> +               0, FFMIN(6, ctb_log2_size_y) - min_qt_log2_size_intra_c);
> +        }
> +    } else {
> +        infer(sps_log2_diff_min_qt_min_cb_intra_slice_chroma, 0);
> +        infer(sps_max_mtt_hierarchy_depth_intra_slice_chroma, 0);
> +    }
> +    if (current->sps_max_mtt_hierarchy_depth_intra_slice_chroma == 0) {
> +        infer(sps_log2_diff_max_bt_min_qt_intra_slice_chroma, 0);
> +        infer(sps_log2_diff_max_tt_min_qt_intra_slice_chroma, 0);
> +    }
> +
> +    ue(sps_log2_diff_min_qt_min_cb_inter_slice,
> +       0, FFMIN(6, ctb_log2_size_y) - min_cb_log2_size_y);
> +    min_qt_log2_size_inter_y =
> +        current->sps_log2_diff_min_qt_min_cb_inter_slice + min_cb_log2_size_y;
> +
> +    ue(sps_max_mtt_hierarchy_depth_inter_slice,
> +       0, 2 * (ctb_log2_size_y - min_cb_log2_size_y));
> +    if (current->sps_max_mtt_hierarchy_depth_inter_slice != 0) {
> +        ue(sps_log2_diff_max_bt_min_qt_inter_slice,
> +           0, ctb_log2_size_y - min_qt_log2_size_inter_y);
> +        ue(sps_log2_diff_max_tt_min_qt_inter_slice,
> +           0, FFMIN(6, ctb_log2_size_y) - min_qt_log2_size_inter_y);
> +    } else {
> +        infer(sps_log2_diff_max_bt_min_qt_inter_slice, 0);
> +        infer(sps_log2_diff_max_tt_min_qt_inter_slice, 0);
> +    }
> +
> +    if (ctb_size_y > 32)
> +        flag(sps_max_luma_transform_size_64_flag);
> +    else
> +        infer(sps_max_luma_transform_size_64_flag, 0);
> +
> +    flag(sps_transform_skip_enabled_flag);
> +    if (current->sps_transform_skip_enabled_flag) {
> +        ue(sps_log2_transform_skip_max_size_minus2, 0, 3);
> +        flag(sps_bdpcm_enabled_flag);
> +    }
> +
> +    flag(sps_mts_enabled_flag);
> +    if (current->sps_mts_enabled_flag) {
> +        flag(sps_explicit_mts_intra_enabled_flag);
> +        flag(sps_explicit_mts_inter_enabled_flag);
> +    } else {
> +        infer(sps_explicit_mts_intra_enabled_flag, 0);
> +        infer(sps_explicit_mts_inter_enabled_flag, 0);
> +    }
> +
> +    flag(sps_lfnst_enabled_flag);
> +
> +    if (current->sps_chroma_format_idc != 0) {
> +        uint8_t num_qp_tables;
> +        flag(sps_joint_cbcr_enabled_flag);
> +        flag(sps_same_qp_table_for_chroma_flag);
> +        num_qp_tables = current->sps_same_qp_table_for_chroma_flag ?
> +            1 : (current->sps_joint_cbcr_enabled_flag ? 3 : 2);
> +        for (i = 0; i < num_qp_tables; i++) {
> +            ses(sps_qp_table_start_minus26[i], -26 - qp_bd_offset, 36, 1, i);
> +            ues(sps_num_points_in_qp_table_minus1[i],
> +                0, 36 - current->sps_qp_table_start_minus26[i], 1, i);
> +            for (j = 0; j <= current->sps_num_points_in_qp_table_minus1[i]; j++) {
> +                uint8_t max = MAX_UINT_BITS(8);
> +                ues(sps_delta_qp_in_val_minus1[i][j], 0, max, 2, i, j);
> +                ues(sps_delta_qp_diff_val[i][j], 0, max, 2, i, j);
> +            }
> +        }
> +    } else {
> +        infer(sps_joint_cbcr_enabled_flag, 0);
> +        infer(sps_same_qp_table_for_chroma_flag, 0);
> +    }
> +
> +    flag(sps_sao_enabled_flag);
> +    flag(sps_alf_enabled_flag);
> +    if (current->sps_alf_enabled_flag && current->sps_chroma_format_idc)
> +        flag(sps_ccalf_enabled_flag);
> +    else
> +        infer(sps_ccalf_enabled_flag, 0);
> +    flag(sps_lmcs_enabled_flag);
> +    flag(sps_weighted_pred_flag);
> +    flag(sps_weighted_bipred_flag);
> +    flag(sps_long_term_ref_pics_flag);
> +    if (current->sps_video_parameter_set_id > 0)
> +        flag(sps_inter_layer_prediction_enabled_flag);
> +    else
> +        infer(sps_inter_layer_prediction_enabled_flag, 0);
> +    flag(sps_idr_rpl_present_flag);
> +    flag(sps_rpl1_same_as_rpl0_flag);
> +
> +    for (i = 0; i < (current->sps_rpl1_same_as_rpl0_flag ? 1 : 2); i++) {
> +        ues(sps_num_ref_pic_lists[i], 0, VVC_MAX_REF_PIC_LISTS, 1, i);
> +        for (j = 0; j < current->sps_num_ref_pic_lists[i]; j++)
> +            CHECK(FUNC(ref_pic_list_struct) (ctx, rw,
> +                                             &current->
> +                                             sps_ref_pic_list_struct[i][j], i,
> +                                             j, current));
> +    }
> +
> +    if (current->sps_rpl1_same_as_rpl0_flag) {
> +        current->sps_num_ref_pic_lists[1] = current->sps_num_ref_pic_lists[0];
> +        for (j = 0; j < current->sps_num_ref_pic_lists[0]; j++)
> +            memcpy(&current->sps_ref_pic_list_struct[1][j],
> +                   &current->sps_ref_pic_list_struct[0][j],
> +                   sizeof(current->sps_ref_pic_list_struct[0][j]));
> +    }
> +
> +    flag(sps_ref_wraparound_enabled_flag);
> +
> +    flag(sps_temporal_mvp_enabled_flag);
> +    if (current->sps_temporal_mvp_enabled_flag)
> +        flag(sps_sbtmvp_enabled_flag);
> +    else
> +        infer(sps_sbtmvp_enabled_flag, 0);
> +
> +    flag(sps_amvr_enabled_flag);
> +    flag(sps_bdof_enabled_flag);
> +    if (current->sps_bdof_enabled_flag)
> +        flag(sps_bdof_control_present_in_ph_flag);
> +    else
> +        infer(sps_bdof_control_present_in_ph_flag, 0);
> +
> +    flag(sps_smvd_enabled_flag);
> +    flag(sps_dmvr_enabled_flag);
> +    if (current->sps_dmvr_enabled_flag)
> +        flag(sps_dmvr_control_present_in_ph_flag);
> +    else
> +        infer(sps_dmvr_control_present_in_ph_flag, 0);
> +
> +    flag(sps_mmvd_enabled_flag);
> +    if (current->sps_mmvd_enabled_flag)
> +        flag(sps_mmvd_fullpel_only_enabled_flag);
> +    else
> +        infer(sps_mmvd_fullpel_only_enabled_flag, 0);
> +
> +    ue(sps_six_minus_max_num_merge_cand, 0, 5);
> +    max_num_merge_cand = 6 - current->sps_six_minus_max_num_merge_cand;
> +
> +    flag(sps_sbt_enabled_flag);
> +
> +    flag(sps_affine_enabled_flag);
> +    if (current->sps_affine_enabled_flag) {
> +        ue(sps_five_minus_max_num_subblock_merge_cand,
> +           0, 5 - current->sps_sbtmvp_enabled_flag);
> +        flag(sps_6param_affine_enabled_flag);
> +        if (current->sps_amvr_enabled_flag)
> +            flag(sps_affine_amvr_enabled_flag);
> +        else
> +            infer(sps_affine_amvr_enabled_flag, 0);
> +        flag(sps_affine_prof_enabled_flag);
> +        if (current->sps_affine_prof_enabled_flag)
> +            flag(sps_prof_control_present_in_ph_flag);
> +        else
> +            infer(sps_prof_control_present_in_ph_flag, 0);
> +    } else {
> +        infer(sps_6param_affine_enabled_flag, 0);
> +        infer(sps_affine_amvr_enabled_flag, 0);
> +        infer(sps_affine_prof_enabled_flag, 0);
> +        infer(sps_prof_control_present_in_ph_flag, 0);
> +    }
> +
> +    flag(sps_bcw_enabled_flag);
> +    flag(sps_ciip_enabled_flag);
> +
> +    if (max_num_merge_cand >= 2) {
> +        flag(sps_gpm_enabled_flag);
> +        if (current->sps_gpm_enabled_flag && max_num_merge_cand >= 3)
> +            ue(sps_max_num_merge_cand_minus_max_num_gpm_cand,
> +               0, max_num_merge_cand - 2);
> +    } else {
> +        infer(sps_gpm_enabled_flag, 0);
> +    }
> +
> +    ue(sps_log2_parallel_merge_level_minus2, 0, ctb_log2_size_y - 2);
> +
> +    flag(sps_isp_enabled_flag);
> +    flag(sps_mrl_enabled_flag);
> +    flag(sps_mip_enabled_flag);
> +
> +    if (current->sps_chroma_format_idc != 0)
> +        flag(sps_cclm_enabled_flag);
> +    else
> +        infer(sps_cclm_enabled_flag, 0);
> +    if (current->sps_chroma_format_idc == 1) {
> +        flag(sps_chroma_horizontal_collocated_flag);
> +        flag(sps_chroma_vertical_collocated_flag);
> +    } else {
> +        infer(sps_chroma_horizontal_collocated_flag, 1);
> +        infer(sps_chroma_vertical_collocated_flag, 1);
> +    }
> +
> +    flag(sps_palette_enabled_flag);
> +    if (current->sps_chroma_format_idc == 3 &&
> +        !current->sps_max_luma_transform_size_64_flag)
> +        flag(sps_act_enabled_flag);
> +    else
> +        infer(sps_act_enabled_flag, 0);
> +    if (current->sps_transform_skip_enabled_flag ||
> +        current->sps_palette_enabled_flag)
> +        ue(sps_min_qp_prime_ts, 0, 8);
> +
> +    flag(sps_ibc_enabled_flag);
> +    if (current->sps_ibc_enabled_flag)
> +        ue(sps_six_minus_max_num_ibc_merge_cand, 0, 5);
> +
> +    flag(sps_ladf_enabled_flag);
> +    if (current->sps_ladf_enabled_flag) {
> +        ub(2, sps_num_ladf_intervals_minus2);
> +        se(sps_ladf_lowest_interval_qp_offset, -63, 63);
> +        for (i = 0; i < current->sps_num_ladf_intervals_minus2 + 1; i++) {
> +            ses(sps_ladf_qp_offset[i], -63, 63, 1, i);
> +            ues(sps_ladf_delta_threshold_minus1[i],
> +                0, (2 << (8 + current->sps_bitdepth_minus8)) - 3, 1, i);
> +        }
> +    }
> +
> +    flag(sps_explicit_scaling_list_enabled_flag);
> +    if (current->sps_lfnst_enabled_flag &&
> +        current->sps_explicit_scaling_list_enabled_flag)
> +        flag(sps_scaling_matrix_for_lfnst_disabled_flag);
> +
> +    if (current->sps_act_enabled_flag &&
> +        current->sps_explicit_scaling_list_enabled_flag)
> +        flag(sps_scaling_matrix_for_alternative_colour_space_disabled_flag);
> +    else
> +        infer(sps_scaling_matrix_for_alternative_colour_space_disabled_flag, 0);
> +    if (current->sps_scaling_matrix_for_alternative_colour_space_disabled_flag)
> +        flag(sps_scaling_matrix_designated_colour_space_flag);
> +
> +    flag(sps_dep_quant_enabled_flag);
> +    flag(sps_sign_data_hiding_enabled_flag);
> +
> +    flag(sps_virtual_boundaries_enabled_flag);
> +    if (current->sps_virtual_boundaries_enabled_flag) {
> +        flag(sps_virtual_boundaries_present_flag);
> +        if (current->sps_virtual_boundaries_present_flag) {
> +            ue(sps_num_ver_virtual_boundaries,
> +               0, current->sps_pic_width_max_in_luma_samples <= 8 ? 0 : 3);
> +            for (i = 0; i < current->sps_num_ver_virtual_boundaries; i++)
> +                ues(sps_virtual_boundary_pos_x_minus1[i],
> +                    0, (current->sps_pic_width_max_in_luma_samples + 7) / 8 - 2,
> +                    1, i);
> +            ue(sps_num_hor_virtual_boundaries,
> +               0, current->sps_pic_height_max_in_luma_samples <= 8 ? 0 : 3);
> +            for (i = 0; i < current->sps_num_hor_virtual_boundaries; i++)
> +                ues(sps_virtual_boundary_pos_y_minus1[i],
> +                    0, (current->sps_pic_height_max_in_luma_samples + 7) /
> +                    8 - 2, 1, i);
> +        }
> +    } else {
> +        infer(sps_virtual_boundaries_present_flag, 0);
> +        infer(sps_num_ver_virtual_boundaries, 0);
> +        infer(sps_num_hor_virtual_boundaries, 0);
> +    }
> +
> +    if (current->sps_ptl_dpb_hrd_params_present_flag) {
> +        flag(sps_timing_hrd_params_present_flag);
> +        if (current->sps_timing_hrd_params_present_flag) {
> +            uint8_t first_sublayer;
> +            CHECK(FUNC(general_timing_hrd_parameters) (ctx, rw,
> +                &current->sps_general_timing_hrd_parameters));
> +            if (current->sps_max_sublayers_minus1 > 0)
> +                flag(sps_sublayer_cpb_params_present_flag);
> +            else
> +                infer(sps_sublayer_cpb_params_present_flag, 0);
> +            first_sublayer = current->sps_sublayer_cpb_params_present_flag ?
> +                0 : current->sps_max_sublayers_minus1;
> +            CHECK(FUNC(ols_timing_hrd_parameters) (ctx, rw,
> +                &current->sps_ols_timing_hrd_parameters, first_sublayer,
> +                current->sps_max_sublayers_minus1,
> +                &current->sps_general_timing_hrd_parameters));
> +        }
> +    }
> +
> +    flag(sps_field_seq_flag);
> +    flag(sps_vui_parameters_present_flag);
> +    if (current->sps_vui_parameters_present_flag) {
> +        ue(sps_vui_payload_size_minus1, 0, 1023);
> +        while (byte_alignment(rw) != 0)
> +            fixed(1, sps_vui_alignment_zero_bit, 0);
> +        CHECK(FUNC(vui_payload) (ctx, rw, &current->vui,
> +                                 current->sps_vui_payload_size_minus1 + 1,
> +                                 current->sps_chroma_format_idc));
> +    } else {
> +        CHECK(FUNC(vui_parameters_default) (ctx, rw, &current->vui));
> +    }
> +    flag(sps_extension_flag);
> +    if (current->sps_extension_flag)
> +        CHECK(FUNC(extension_data) (ctx, rw, &current->extension_data));
> +
> +    CHECK(FUNC(rbsp_trailing_bits) (ctx, rw));
> +
> +    return 0;
> +}
> +
> +static int FUNC(pps) (CodedBitstreamContext *ctx, RWContext *rw,
> +                      H266RawPPS *current)
> +{
> +    CodedBitstreamH266Context *h266 = ctx->priv_data;
> +    const H266RawSPS *sps;
> +    int err, i;
> +    unsigned int min_cb_size_y, divisor, ctb_size_y,
> +        pic_width_in_ctbs_y, pic_height_in_ctbs_y;
> +    uint8_t sub_width_c, sub_height_c, qp_bd_offset;
> +
> +    static const uint8_t h266_sub_width_c[] = {
> +        1, 2, 2, 1
> +    };
> +    static const uint8_t h266_sub_height_c[] = {
> +        1, 2, 1, 1
> +    };
> +
> +    HEADER("Picture Parameter Set");
> +
> +    CHECK(FUNC(nal_unit_header) (ctx, rw,
> +                                 &current->nal_unit_header, VVC_PPS_NUT));
> +
> +    ub(6, pps_pic_parameter_set_id);
> +    ub(4, pps_seq_parameter_set_id);
> +    sps = h266->sps[current->pps_seq_parameter_set_id];
> +    if (!sps) {
> +        av_log(ctx->log_ctx, AV_LOG_ERROR, "SPS id %d not available.\n",
> +               current->pps_seq_parameter_set_id);
> +        return AVERROR_INVALIDDATA;
> +    }
> +
> +    flag(pps_mixed_nalu_types_in_pic_flag);
> +    ue(pps_pic_width_in_luma_samples,
> +       1, sps->sps_pic_width_max_in_luma_samples);
> +    ue(pps_pic_height_in_luma_samples,
> +       1, sps->sps_pic_height_max_in_luma_samples);
> +
> +    min_cb_size_y = 1 << (sps->sps_log2_min_luma_coding_block_size_minus2 + 2);
> +    divisor = FFMAX(min_cb_size_y, 8);
> +    if (current->pps_pic_width_in_luma_samples % divisor ||
> +        current->pps_pic_height_in_luma_samples % divisor) {
> +        av_log(ctx->log_ctx, AV_LOG_ERROR,
> +               "Invalid dimensions: %ux%u not divisible "
> +               "by %u, MinCbSizeY = %u.\n",
> +               current->pps_pic_width_in_luma_samples,
> +               current->pps_pic_height_in_luma_samples, divisor, min_cb_size_y);
> +        return AVERROR_INVALIDDATA;
> +    }
> +    if (!sps->sps_res_change_in_clvs_allowed_flag &&
> +        (current->pps_pic_width_in_luma_samples !=
> +         sps->sps_pic_width_max_in_luma_samples ||
> +         current->pps_pic_height_in_luma_samples !=
> +         sps->sps_pic_height_max_in_luma_samples)) {
> +        av_log(ctx->log_ctx, AV_LOG_ERROR,
> +               "Resoltuion change is not allowed, "
> +               "in max resolution (%ux%u) mismatched with pps(%ux%u).\n",
> +               sps->sps_pic_width_max_in_luma_samples,
> +               sps->sps_pic_height_max_in_luma_samples,
> +               current->pps_pic_width_in_luma_samples,
> +               current->pps_pic_height_in_luma_samples);
> +        return AVERROR_INVALIDDATA;
> +    }
> +
> +    ctb_size_y = 1 << (sps->sps_log2_ctu_size_minus5 + 5);
> +    if (sps->sps_ref_wraparound_enabled_flag) {
> +        if ((ctb_size_y / min_cb_size_y + 1) >
> +            (current->pps_pic_width_in_luma_samples / min_cb_size_y - 1)) {
> +            av_log(ctx->log_ctx, AV_LOG_ERROR,
> +                   "Invalid width(%u), ctb_size_y = %u, min_cb_size_y = %u.\n",
> +                   current->pps_pic_width_in_luma_samples,
> +                   ctb_size_y, min_cb_size_y);
> +            return AVERROR_INVALIDDATA;
> +        }
> +    }
> +
> +    flag(pps_conformance_window_flag);
> +    if (current->pps_pic_width_in_luma_samples ==
> +        sps->sps_pic_width_max_in_luma_samples &&
> +        current->pps_pic_height_in_luma_samples ==
> +        sps->sps_pic_height_max_in_luma_samples &&
> +        current->pps_conformance_window_flag) {
> +        av_log(ctx->log_ctx, AV_LOG_ERROR,
> +               "Conformance window flag should not true.\n");
> +        return AVERROR_INVALIDDATA;
> +    }
> +
> +    sub_width_c = h266_sub_width_c[sps->sps_chroma_format_idc];
> +    sub_height_c = h266_sub_height_c[sps->sps_chroma_format_idc];
> +    if (current->pps_conformance_window_flag) {
> +        ue(pps_conf_win_left_offset, 0, current->pps_pic_width_in_luma_samples);
> +        ue(pps_conf_win_right_offset,
> +           0, current->pps_pic_width_in_luma_samples);
> +        ue(pps_conf_win_top_offset, 0, current->pps_pic_height_in_luma_samples);
> +        ue(pps_conf_win_bottom_offset,
> +           0, current->pps_pic_height_in_luma_samples);
> +        if (sub_width_c *
> +            (current->pps_conf_win_left_offset +
> +             current->pps_conf_win_right_offset) >=
> +            current->pps_pic_width_in_luma_samples ||
> +            sub_height_c *
> +            (current->pps_conf_win_top_offset +
> +             current->pps_conf_win_bottom_offset) >=
> +            current->pps_pic_height_in_luma_samples) {
> +            av_log(ctx->log_ctx, AV_LOG_ERROR,
> +                   "Invalid pps conformance window: (%u, %u, %u, %u), "
> +                   "resolution is %ux%u, sub wxh is %ux%u.\n",
> +                   current->pps_conf_win_left_offset,
> +                   current->pps_conf_win_right_offset,
> +                   current->pps_conf_win_top_offset,
> +                   current->pps_conf_win_bottom_offset,
> +                   current->pps_pic_width_in_luma_samples,
> +                   current->pps_pic_height_in_luma_samples,
> +                   sub_width_c, sub_height_c);
> +            return AVERROR_INVALIDDATA;
> +        }
> +    } else {
> +        if (current->pps_pic_width_in_luma_samples ==
> +            sps->sps_pic_width_max_in_luma_samples &&
> +            current->pps_pic_height_in_luma_samples ==
> +            sps->sps_pic_height_max_in_luma_samples) {
> +            infer(pps_conf_win_left_offset, sps->sps_conf_win_left_offset);
> +            infer(pps_conf_win_right_offset, sps->sps_conf_win_right_offset);
> +            infer(pps_conf_win_top_offset, sps->sps_conf_win_top_offset);
> +            infer(pps_conf_win_bottom_offset, sps->sps_conf_win_bottom_offset);
> +        } else {
> +            infer(pps_conf_win_left_offset, 0);
> +            infer(pps_conf_win_right_offset, 0);
> +            infer(pps_conf_win_top_offset, 0);
> +            infer(pps_conf_win_bottom_offset, 0);
> +        }
> +
> +    }
> +
> +    flag(pps_scaling_window_explicit_signalling_flag);
> +    if (!sps->sps_ref_pic_resampling_enabled_flag &&
> +        current->pps_scaling_window_explicit_signalling_flag) {
> +        av_log(ctx->log_ctx, AV_LOG_ERROR,
> +               "Invalid data: sps_ref_pic_resampling_enabled_flag is false, "
> +               "but pps_scaling_window_explicit_signalling_flag is true.\n");
> +        return AVERROR_INVALIDDATA;
> +    }
> +    if (current->pps_scaling_window_explicit_signalling_flag) {
> +        se(pps_scaling_win_left_offset,
> +           -current->pps_pic_width_in_luma_samples * 15 / sub_width_c,
> +           current->pps_pic_width_in_luma_samples / sub_width_c);
> +        se(pps_scaling_win_right_offset,
> +           -current->pps_pic_width_in_luma_samples * 15 / sub_width_c,
> +           current->pps_pic_width_in_luma_samples / sub_width_c);
> +        se(pps_scaling_win_top_offset,
> +           -current->pps_pic_height_in_luma_samples * 15 / sub_height_c,
> +           current->pps_pic_height_in_luma_samples / sub_height_c);
> +        se(pps_scaling_win_bottom_offset,
> +           -current->pps_pic_height_in_luma_samples * 15 / sub_height_c,
> +           current->pps_pic_height_in_luma_samples / sub_height_c);
> +    } else {
> +        infer(pps_scaling_win_left_offset, current->pps_conf_win_left_offset);
> +        infer(pps_scaling_win_right_offset, current->pps_conf_win_right_offset);
> +        infer(pps_scaling_win_top_offset, current->pps_conf_win_top_offset);
> +        infer(pps_scaling_win_bottom_offset, current->pps_conf_win_bottom_offset);
> +    }
> +
> +    flag(pps_output_flag_present_flag);
> +    flag(pps_no_pic_partition_flag);
> +    flag(pps_subpic_id_mapping_present_flag);
> +
> +    if (current->pps_subpic_id_mapping_present_flag) {
> +        if (!current->pps_no_pic_partition_flag) {
> +            ue(pps_num_subpics_minus1,
> +               sps->sps_num_subpics_minus1, sps->sps_num_subpics_minus1);
> +        } else {
> +            infer(pps_num_subpics_minus1, 0);
> +        }
> +        ue(pps_subpic_id_len_minus1, sps->sps_subpic_id_len_minus1,
> +           sps->sps_subpic_id_len_minus1);
> +        for (i = 0; i <= current->pps_num_subpics_minus1; i++) {
> +            ubs(sps->sps_subpic_id_len_minus1 + 1, pps_subpic_id[i], 1, i);
> +        }
> +    }
> +
> +    pic_width_in_ctbs_y =
> +        h266_ceil(current->pps_pic_width_in_luma_samples, ctb_size_y);
> +    pic_height_in_ctbs_y =
> +        h266_ceil(current->pps_pic_height_in_luma_samples, ctb_size_y);
> +    if (!current->pps_no_pic_partition_flag) {
> +        unsigned int exp_tile_width = 0, exp_tile_height = 0;
> +        unsigned int unified_size, remaining_size;
> +
> +        u(2, pps_log2_ctu_size_minus5,
> +          sps->sps_log2_ctu_size_minus5, sps->sps_log2_ctu_size_minus5);
> +        ue(pps_num_exp_tile_columns_minus1,
> +           0, FFMIN(pic_width_in_ctbs_y - 1, VVC_MAX_TILE_COLUMNS - 1));
> +        ue(pps_num_exp_tile_rows_minus1,
> +           0, FFMIN(pic_height_in_ctbs_y - 1, VVC_MAX_TILE_ROWS - 1));
> +
> +        for (i = 0; i <= current->pps_num_exp_tile_columns_minus1; i++) {
> +            ues(pps_tile_column_width_minus1[i],
> +                0, pic_width_in_ctbs_y - exp_tile_width - 1, 1, i);
> +            exp_tile_width += current->pps_tile_column_width_minus1[i] + 1;
> +        }
> +        remaining_size = pic_width_in_ctbs_y - exp_tile_width;
> +        unified_size = (i == 0 ? pic_width_in_ctbs_y :
> +                        (current->pps_tile_column_width_minus1[i - 1] + 1));
> +        current->num_tile_columns = i + h266_ceil(remaining_size, unified_size);
> +        if (current->num_tile_columns > VVC_MAX_TILE_COLUMNS) {
> +            av_log(ctx->log_ctx, AV_LOG_ERROR,
> +                   "NumTileColumns(%d) large than %d.\n",
> +                   current->num_tile_columns, VVC_MAX_TILE_COLUMNS);
> +            return AVERROR_INVALIDDATA;
> +        }
> +        while (remaining_size > unified_size) {
> +            current->pps_tile_column_width_minus1[i] = unified_size - 1;
> +            remaining_size -= unified_size;
> +            i++;
> +        }
> +        if (remaining_size > 0) {
> +            current->pps_tile_column_width_minus1[i] = remaining_size - 1;
> +        }
> +
> +        for (i = 0; i <= current->pps_num_exp_tile_rows_minus1; i++) {
> +            ues(pps_tile_row_height_minus1[i],
> +                0, pic_height_in_ctbs_y - 1, 1, i);
> +            exp_tile_height += current->pps_tile_row_height_minus1[i] + 1;
> +        }
> +        remaining_size = pic_height_in_ctbs_y - exp_tile_height;
> +        unified_size = (i == 0 ? pic_height_in_ctbs_y :
> +                        (current->pps_tile_row_height_minus1[i - 1] + 1));
> +        current->num_tile_rows = i + h266_ceil(remaining_size, unified_size);
> +        if (current->num_tile_rows > VVC_MAX_TILE_ROWS) {
> +            av_log(ctx->log_ctx, AV_LOG_ERROR,
> +                   "NumTileRows(%d) large than %d, consider increase VVC_MAX_TILE_ROWS.\n",
> +                   current->num_tile_rows, VVC_MAX_TILE_ROWS);
> +            return AVERROR_INVALIDDATA;
> +        }
> +        while (remaining_size > unified_size) {
> +            current->pps_tile_row_height_minus1[i] = unified_size - 1;
> +            remaining_size -= unified_size;
> +            i++;
> +        }
> +        if (remaining_size > 0) {
> +            current->pps_tile_row_height_minus1[i] = remaining_size - 1;
> +        }
> +
> +        current->num_tiles_in_pic =
> +            current->num_tile_columns * current->num_tile_rows;
> +        if (current->num_tiles_in_pic > VVC_MAX_TILES_PER_AU) {
> +            av_log(ctx->log_ctx, AV_LOG_ERROR,
> +                   "NumTilesInPic(%d) large than %d.\n",
> +                   current->num_tiles_in_pic, VVC_MAX_TILES_PER_AU);
> +            return AVERROR_INVALIDDATA;
> +        }
> +
> +        if (current->num_tiles_in_pic > 1) {
> +            flag(pps_loop_filter_across_tiles_enabled_flag);
> +            flag(pps_rect_slice_flag);
> +        } else {
> +            infer(pps_loop_filter_across_tiles_enabled_flag, 0);
> +            infer(pps_rect_slice_flag, 1);
> +        }
> +        if (current->pps_rect_slice_flag)
> +            flag(pps_single_slice_per_subpic_flag);
> +        else
> +            infer(pps_single_slice_per_subpic_flag, 1);
> +        if (current->pps_rect_slice_flag &&
> +            !current->pps_single_slice_per_subpic_flag) {
> +            int j;
> +            uint16_t tile_idx = 0, tile_x, tile_y, ctu_x, ctu_y;
> +            uint16_t slice_top_left_ctu_x[VVC_MAX_SLICES];
> +            uint16_t slice_top_left_ctu_y[VVC_MAX_SLICES];
> +            ue(pps_num_slices_in_pic_minus1, 0, VVC_MAX_SLICES - 1);
> +            if (current->pps_num_slices_in_pic_minus1 > 1)
> +                flag(pps_tile_idx_delta_present_flag);
> +            else
> +                infer(pps_tile_idx_delta_present_flag, 0);
> +            for (i = 0; i < current->pps_num_slices_in_pic_minus1; i++) {
> +                tile_x = tile_idx % current->num_tile_columns;
> +                tile_y = tile_idx / current->num_tile_columns;
> +                if (tile_x != current->num_tile_columns - 1) {
> +                    ues(pps_slice_width_in_tiles_minus1[i],
> +                        0, current->num_tile_columns - 1, 1, i);
> +                } else {
> +                    infer(pps_slice_width_in_tiles_minus1[i], 0);
> +                }
> +                if (tile_y != current->num_tile_rows - 1 &&
> +                    (current->pps_tile_idx_delta_present_flag || tile_x == 0)) {
> +                    ues(pps_slice_height_in_tiles_minus1[i],
> +                        0, current->num_tile_rows - 1, 1, i);
> +                } else {
> +                    if (tile_y == current->num_tile_rows - 1)
> +                        infer(pps_slice_height_in_tiles_minus1[i], 0);
> +                    else
> +                        infer(pps_slice_height_in_tiles_minus1[i],
> +                              current->pps_slice_height_in_tiles_minus1[i - 1]);
> +                }
> +
> +                ctu_x = ctu_y = 0;
> +                for (j = 0; j < tile_x; j++) {
> +                    ctu_x += current->pps_tile_column_width_minus1[j] + 1;
> +                }
> +                for (j = 0; j < tile_y; j++) {
> +                    ctu_y += current->pps_tile_row_height_minus1[j] + 1;
> +                }
> +                if (current->pps_slice_width_in_tiles_minus1[i] == 0 &&
> +                    current->pps_slice_height_in_tiles_minus1[i] == 0 &&
> +                    current->pps_tile_row_height_minus1[tile_y] > 0) {
> +                    int num_slices_in_tile,
> +                        uniform_slice_height, remaining_height_in_ctbs_y;
> +                    remaining_height_in_ctbs_y =
> +                        current->pps_tile_row_height_minus1[tile_y] + 1;
> +                    ues(pps_num_exp_slices_in_tile[i],
> +                        0, current->pps_tile_row_height_minus1[tile_y], 1, i);
> +                    if (current->pps_num_exp_slices_in_tile[i] == 0) {
> +                        num_slices_in_tile = 1;
> +                        slice_top_left_ctu_x[i] = ctu_x;
> +                        slice_top_left_ctu_y[i] = ctu_y;
> +                    } else {
> +                        uint16_t slice_height_in_ctus;
> +                        for (j = 0; j < current->pps_num_exp_slices_in_tile[i];
> +                             j++) {
> +                            ues(pps_exp_slice_height_in_ctus_minus1[i][j], 0,
> +                                current->pps_tile_row_height_minus1[tile_y], 2,
> +                                i, j);
> +                            slice_height_in_ctus =
> +                                current->
> +                                pps_exp_slice_height_in_ctus_minus1[i][j] + 1;
> +
> +                            current->slice_height_in_ctus[i + j] =
> +                                slice_height_in_ctus;
> +                            slice_top_left_ctu_x[i + j] = ctu_x;
> +                            slice_top_left_ctu_y[i + j] = ctu_y;
> +                            ctu_y += slice_height_in_ctus;
> +
> +                            remaining_height_in_ctbs_y -= slice_height_in_ctus;
> +                        }
> +                        uniform_slice_height = 1 +
> +                            (j == 0 ? current->pps_tile_row_height_minus1[tile_y] :
> +                            current->pps_exp_slice_height_in_ctus_minus1[i][j-1]);
> +                        while (remaining_height_in_ctbs_y > uniform_slice_height) {
> +                            current->slice_height_in_ctus[i + j] =
> +                                                          uniform_slice_height;
> +                            slice_top_left_ctu_x[i + j] = ctu_x;
> +                            slice_top_left_ctu_y[i + j] = ctu_y;
> +                            ctu_y += uniform_slice_height;
> +
> +                            remaining_height_in_ctbs_y -= uniform_slice_height;
> +                            j++;
> +                        }
> +                        if (remaining_height_in_ctbs_y > 0) {
> +                            current->slice_height_in_ctus[i + j] =
> +                                remaining_height_in_ctbs_y;
> +                            slice_top_left_ctu_x[i + j] = ctu_x;
> +                            slice_top_left_ctu_y[i + j] = ctu_y;
> +                            j++;
> +                        }
> +                        num_slices_in_tile = j;
> +                    }
> +                    i += num_slices_in_tile - 1;
> +                } else {
> +                    uint16_t height = 0;
> +                    infer(pps_num_exp_slices_in_tile[i], 0);
> +                    for (j = 0;
> +                         j <= current->pps_slice_height_in_tiles_minus1[i];
> +                         j++) {
> +                        height +=
> +                           current->pps_tile_row_height_minus1[tile_y + j] + 1;
> +                    }
> +                    current->slice_height_in_ctus[i] = height;
> +
> +                    slice_top_left_ctu_x[i] = ctu_x;
> +                    slice_top_left_ctu_y[i] = ctu_y;
> +                }
> +                if (i < current->pps_num_slices_in_pic_minus1) {
> +                    if (current->pps_tile_idx_delta_present_flag) {
> +                        ses(pps_tile_idx_delta_val[i],
> +                            -current->num_tiles_in_pic + 1,
> +                            current->num_tiles_in_pic - 1, 1, i);
> +                        if (current->pps_tile_idx_delta_val[i] == 0) {
> +                            av_log(ctx->log_ctx, AV_LOG_ERROR,
> +                                   "pps_tile_idx_delta_val[i] shall not be equal to 0.\n");
> +                        }
> +                        tile_idx += current->pps_tile_idx_delta_val[i];
> +                    } else {
> +                        infer(pps_tile_idx_delta_val[i], 0);
> +                        tile_idx +=
> +                            current->pps_slice_width_in_tiles_minus1[i] + 1;
> +                        if (tile_idx % current->num_tile_columns == 0) {
> +                            tile_idx +=
> +                                current->pps_slice_height_in_tiles_minus1[i] *
> +                                current->num_tile_columns;
> +                        }
> +                    }
> +                }
> +            }
> +            if (i == current->pps_num_slices_in_pic_minus1) {
> +                uint16_t height = 0;
> +
> +                tile_x = tile_idx % current->num_tile_columns;
> +                tile_y = tile_idx / current->num_tile_columns;
> +
> +                ctu_x = 0, ctu_y = 0;
> +                for (j = 0; j < tile_x; j++) {
> +                    ctu_x += current->pps_tile_column_width_minus1[j] + 1;
> +                }
> +                for (j = 0; j < tile_y; j++) {
> +                    ctu_y += current->pps_tile_row_height_minus1[j] + 1;
> +                }
> +                slice_top_left_ctu_x[i] = ctu_x;
> +                slice_top_left_ctu_y[i] = ctu_y;
> +
> +                current->pps_slice_width_in_tiles_minus1[i] =
> +                    current->num_tile_columns - tile_x - 1;
> +                current->pps_slice_height_in_tiles_minus1[i] =
> +                    current->num_tile_rows - tile_y - 1;
> +
> +                for (j = 0; j <= current->pps_slice_height_in_tiles_minus1[i];
> +                     j++) {
> +                    height +=
> +                        current->pps_tile_row_height_minus1[tile_y + j] + 1;
> +                }
> +                current->slice_height_in_ctus[i] = height;
> +
> +                infer(pps_num_exp_slices_in_tile[i], 0);
> +            }
> +            //now, we got all slice information, let's resolve NumSlicesInSubpic
> +            for (i = 0; i <= sps->sps_num_subpics_minus1; i++) {
> +                current->num_slices_in_subpic[i] = 0;
> +                for (j = 0; j <= current->pps_num_slices_in_pic_minus1; j++) {
> +                    uint16_t pos_x = 0, pos_y = 0;
> +                    pos_x = slice_top_left_ctu_x[j];
> +                    pos_y = slice_top_left_ctu_y[j];
> +                    if ((pos_x >= sps->sps_subpic_ctu_top_left_x[i]) &&
> +                        (pos_x <
> +                         sps->sps_subpic_ctu_top_left_x[i] +
> +                         sps->sps_subpic_width_minus1[i] + 1) &&
> +                         (pos_y >= sps->sps_subpic_ctu_top_left_y[i]) &&
> +                         (pos_y < sps->sps_subpic_ctu_top_left_y[i] +
> +                            sps->sps_subpic_height_minus1[i] + 1)) {
> +                        current->num_slices_in_subpic[i]++;
> +                    }
> +                }
> +            }
> +        } else {
> +            if (current->pps_no_pic_partition_flag)
> +                infer(pps_num_slices_in_pic_minus1, 0);
> +            else if (current->pps_single_slice_per_subpic_flag)
> +                infer(pps_num_slices_in_pic_minus1,
> +                      sps->sps_num_subpics_minus1);
> +            // else?
> +        }
> +        if (!current->pps_rect_slice_flag ||
> +            current->pps_single_slice_per_subpic_flag ||
> +            current->pps_num_slices_in_pic_minus1 > 0)
> +            flag(pps_loop_filter_across_slices_enabled_flag);
> +        else
> +            infer(pps_loop_filter_across_slices_enabled_flag, 0);
> +    } else {
> +        infer(pps_num_exp_tile_columns_minus1, 0);
> +        infer(pps_tile_column_width_minus1[0], pic_width_in_ctbs_y - 1);
> +        infer(pps_num_exp_tile_rows_minus1, 0);
> +        infer(pps_tile_row_height_minus1[0], pic_height_in_ctbs_y - 1);
> +        infer(num_tile_columns, 1);
> +        infer(num_tile_rows, 1);
> +        infer(num_tiles_in_pic, 1);
> +    }
> +
> +    flag(pps_cabac_init_present_flag);
> +    for (i = 0; i < 2; i++)
> +        ues(pps_num_ref_idx_default_active_minus1[i], 0, 14, 1, i);
> +    flag(pps_rpl1_idx_present_flag);
> +    flag(pps_weighted_pred_flag);
> +    flag(pps_weighted_bipred_flag);
> +    flag(pps_ref_wraparound_enabled_flag);
> +    if (current->pps_ref_wraparound_enabled_flag) {
> +        ue(pps_pic_width_minus_wraparound_offset,
> +           0, (current->pps_pic_width_in_luma_samples / min_cb_size_y)
> +           - (ctb_size_y / min_cb_size_y) - 2);
> +    }
> +
> +    qp_bd_offset = 6 * sps->sps_bitdepth_minus8;
> +    se(pps_init_qp_minus26, -(26 + qp_bd_offset), 37);
> +    flag(pps_cu_qp_delta_enabled_flag);
> +    flag(pps_chroma_tool_offsets_present_flag);
> +    if (current->pps_chroma_tool_offsets_present_flag) {
> +        se(pps_cb_qp_offset, -12, 12);
> +        se(pps_cr_qp_offset, -12, 12);
> +        flag(pps_joint_cbcr_qp_offset_present_flag);
> +        if (current->pps_joint_cbcr_qp_offset_present_flag)
> +            se(pps_joint_cbcr_qp_offset_value, -12, 12);
> +        else
> +            infer(pps_joint_cbcr_qp_offset_value, 0);
> +        flag(pps_slice_chroma_qp_offsets_present_flag);
> +        flag(pps_cu_chroma_qp_offset_list_enabled_flag);
> +        if (current->pps_cu_chroma_qp_offset_list_enabled_flag) {
> +            ue(pps_chroma_qp_offset_list_len_minus1, 0, 5);
> +            for (i = 0; i <= current->pps_chroma_qp_offset_list_len_minus1; i++) {
> +                ses(pps_cb_qp_offset_list[i], -12, 12, 1, i);
> +                ses(pps_cr_qp_offset_list[i], -12, 12, 1, i);
> +                if (current->pps_joint_cbcr_qp_offset_present_flag)
> +                    ses(pps_joint_cbcr_qp_offset_list[i], -12, 12, 1, i);
> +                else
> +                    infer(pps_joint_cbcr_qp_offset_list[i], 0);
> +            }
> +        }
> +    } else {
> +        infer(pps_cb_qp_offset, 0);
> +        infer(pps_cr_qp_offset, 0);
> +        infer(pps_joint_cbcr_qp_offset_present_flag, 0);
> +        infer(pps_joint_cbcr_qp_offset_value, 0);
> +        infer(pps_slice_chroma_qp_offsets_present_flag, 0);
> +        infer(pps_cu_chroma_qp_offset_list_enabled_flag, 0);
> +    }
> +    flag(pps_deblocking_filter_control_present_flag);
> +    if (current->pps_deblocking_filter_control_present_flag) {
> +        flag(pps_deblocking_filter_override_enabled_flag);
> +        flag(pps_deblocking_filter_disabled_flag);
> +        if (!current->pps_no_pic_partition_flag &&
> +            current->pps_deblocking_filter_override_enabled_flag)
> +            flag(pps_dbf_info_in_ph_flag);
> +        else
> +            infer(pps_dbf_info_in_ph_flag, 0);
> +        if (!current->pps_deblocking_filter_disabled_flag) {
> +            se(pps_luma_beta_offset_div2, -12, 12);
> +            se(pps_luma_tc_offset_div2, -12, 12);
> +            if (current->pps_chroma_tool_offsets_present_flag) {
> +                se(pps_cb_beta_offset_div2, -12, 12);
> +                se(pps_cb_tc_offset_div2, -12, 12);
> +                se(pps_cr_beta_offset_div2, -12, 12);
> +                se(pps_cr_tc_offset_div2, -12, 12);
> +            } else {
> +                infer(pps_cb_beta_offset_div2,
> +                      current->pps_luma_beta_offset_div2);
> +                infer(pps_cb_tc_offset_div2, current->pps_luma_tc_offset_div2);
> +                infer(pps_cr_beta_offset_div2,
> +                      current->pps_luma_beta_offset_div2);
> +                infer(pps_cr_tc_offset_div2, current->pps_luma_tc_offset_div2);
> +            }
> +        } else {
> +            infer(pps_luma_beta_offset_div2, 0);
> +            infer(pps_luma_tc_offset_div2, 0);
> +            infer(pps_cb_beta_offset_div2, 0);
> +            infer(pps_cb_tc_offset_div2, 0);
> +            infer(pps_cr_beta_offset_div2, 0);
> +            infer(pps_cr_tc_offset_div2, 0);
> +        }
> +    } else {
> +        infer(pps_deblocking_filter_override_enabled_flag, 0);
> +        infer(pps_deblocking_filter_disabled_flag, 0);
> +        infer(pps_dbf_info_in_ph_flag, 0);
> +        infer(pps_luma_beta_offset_div2, 0);
> +        infer(pps_luma_tc_offset_div2, 0);
> +        infer(pps_cb_beta_offset_div2, 0);
> +        infer(pps_cb_tc_offset_div2, 0);
> +        infer(pps_cr_beta_offset_div2, 0);
> +        infer(pps_cr_tc_offset_div2, 0);
> +    }
> +
> +    if (!current->pps_no_pic_partition_flag) {
> +        flag(pps_rpl_info_in_ph_flag);
> +        flag(pps_sao_info_in_ph_flag);
> +        flag(pps_alf_info_in_ph_flag);
> +        if ((current->pps_weighted_pred_flag ||
> +             current->pps_weighted_bipred_flag) &&
> +            current->pps_rpl_info_in_ph_flag)
> +            flag(pps_wp_info_in_ph_flag);
> +        flag(pps_qp_delta_info_in_ph_flag);
> +    }
> +    flag(pps_picture_header_extension_present_flag);
> +    flag(pps_slice_header_extension_present_flag);
> +
> +    flag(pps_extension_flag);
> +    if (current->pps_extension_flag)
> +        CHECK(FUNC(extension_data) (ctx, rw, &current->extension_data));
> +
> +    CHECK(FUNC(rbsp_trailing_bits) (ctx, rw));
> +    return 0;
> +}
> +
> +static int FUNC(aud) (CodedBitstreamContext *ctx, RWContext *rw,
> +                     H266RawAUD *current)
> +{
> +    int err;
> +
> +    HEADER("Access Unit Delimiter");
> +
> +    CHECK(FUNC(nal_unit_header) (ctx, rw,
> +                                 &current->nal_unit_header, VVC_AUD_NUT));
> +
> +    flag(aud_irap_or_gdr_flag);
> +    u(3, aud_pic_type, 0, 2);
> +
> +    CHECK(FUNC(rbsp_trailing_bits) (ctx, rw));
> +    return 0;
> +}
> +
> +static int FUNC(pred_weight_table) (CodedBitstreamContext *ctx, RWContext *rw,
> +                                    const H266RawSPS *sps,
> +                                    const H266RawPPS *pps,
> +                                    const H266RefPicLists *ref_lists,
> +                                    uint8_t num_ref_idx_active[2],
> +                                    H266RawPredWeightTable *current)
> +{
> +    int err, i, j;
> +    uint8_t num_weights_l0, num_weights_l1;
> +    ue(luma_log2_weight_denom, 0, 7);
> +    if (sps->sps_chroma_format_idc != 0) {
> +        se(delta_chroma_log2_weight_denom,
> +           -current->luma_log2_weight_denom,
> +           7 - current->luma_log2_weight_denom);
> +    } else {
> +        infer(delta_chroma_log2_weight_denom, 0);
> +    }
> +    if (pps->pps_wp_info_in_ph_flag)
> +        ue(num_l0_weights, 0,
> +           FFMIN(15, ref_lists->rpl_ref_list[0].num_ref_entries));
> +    else
> +        infer(num_l0_weights, 0);
> +    num_weights_l0 = pps->pps_wp_info_in_ph_flag ?
> +        current->num_l0_weights : num_ref_idx_active[0];
> +    for (i = 0; i < num_weights_l0; i++) {
> +        flags(luma_weight_l0_flag[i], 1, i);
> +    }
> +    if (sps->sps_chroma_format_idc != 0) {
> +        for (i = 0; i < num_weights_l0; i++)
> +            flags(chroma_weight_l0_flag[i], 1, i);
> +    }
> +    for (i = 0; i < num_weights_l0; i++) {
> +        if (current->luma_weight_l0_flag[i]) {
> +            ses(delta_luma_weight_l0[i], -128, 127, 1, i);
> +            ses(luma_offset_l0[i], -128, 127, 1, i);
> +        } else {
> +            infer(delta_luma_weight_l0[i], 0);
> +            infer(luma_offset_l0[i], 0);
> +        }
> +        if (current->chroma_weight_l0_flag[i]) {
> +            for (j = 0; j < 2; j++) {
> +                ses(delta_chroma_weight_l0[i][j], -128, 127, 2, i, j);
> +                ses(delta_chroma_offset_l0[i][j], -4 * 128, 4 * 127, 2, i, j);
> +            }
> +        }
> +    }
> +
> +    if (pps->pps_weighted_bipred_flag && pps->pps_wp_info_in_ph_flag &&
> +        ref_lists->rpl_ref_list[1].num_ref_entries > 0) {
> +        ue(num_l1_weights, 0,
> +           FFMIN(15, ref_lists->rpl_ref_list[1].num_ref_entries));
> +    }
> +    if (!pps->pps_weighted_bipred_flag ||
> +        (pps->pps_wp_info_in_ph_flag &&
> +         ref_lists->rpl_ref_list[1].num_ref_entries == 0)) {
> +        num_weights_l1 = 0;
> +    } else if (pps->pps_wp_info_in_ph_flag) {
> +        num_weights_l1 = current->num_l1_weights;
> +    } else {
> +        num_weights_l1 = num_ref_idx_active[1];
> +    }
> +
> +    for (i = 0; i < num_weights_l1; i++)
> +        flags(luma_weight_l1_flag[i], 1, i);
> +    if (sps->sps_chroma_format_idc != 0) {
> +        for (i = 0; i < num_weights_l1; i++)
> +            flags(chroma_weight_l1_flag[i], 1, i);
> +    }
> +    for (i = 0; i < num_weights_l1; i++) {
> +        if (current->luma_weight_l1_flag[i]) {
> +            ses(delta_luma_weight_l1[i], -128, 127, 1, i);
> +            ses(luma_offset_l1[i], -128, 127, 1, i);
> +        } else {
> +            infer(delta_luma_weight_l1[i], 0);
> +            infer(luma_offset_l1[i], 0);
> +        }
> +        if (current->chroma_weight_l1_flag[i]) {
> +            for (j = 0; j < 2; j++) {
> +                ses(delta_chroma_weight_l1[i][j], -128, 127, 2, i, j);
> +                ses(delta_chroma_offset_l1[i][j], -4 * 128, 4 * 127, 2, i, j);
> +            }
> +        }
> +    }
> +    return 0;
> +}
> +
> +static int FUNC(picture_header) (CodedBitstreamContext *ctx, RWContext *rw,
> +                                 H266RawPH *current){
> +    CodedBitstreamH266Context *h266 = ctx->priv_data;
> +    const H266RawVPS *vps;
> +    const H266RawSPS *sps;
> +    const H266RawPPS *pps;
> +    int err, i;
> +    unsigned int ctb_log2_size_y, min_cb_log2_size_y,
> +        min_qt_log2_size_intra_y, min_qt_log2_size_inter_y;
> +    uint8_t qp_bd_offset;
> +
> +    flag(ph_gdr_or_irap_pic_flag);
> +    flag(ph_non_ref_pic_flag);
> +    if (current->ph_gdr_or_irap_pic_flag)
> +        flag(ph_gdr_pic_flag);
> +    else
> +        infer(ph_gdr_pic_flag, 0);
> +    flag(ph_inter_slice_allowed_flag);
> +    if (current->ph_inter_slice_allowed_flag)
> +        flag(ph_intra_slice_allowed_flag);
> +    else
> +        infer(ph_intra_slice_allowed_flag, 1);
> +    ue(ph_pic_parameter_set_id, 0, VVC_MAX_PPS_COUNT - 1);
> +    pps = h266->pps[current->ph_pic_parameter_set_id];
> +    if (!pps) {
> +        av_log(ctx->log_ctx, AV_LOG_ERROR, "PPS id %d not available.\n",
> +               current->ph_pic_parameter_set_id);
> +        return AVERROR_INVALIDDATA;
> +    }
> +    sps = h266->sps[pps->pps_seq_parameter_set_id];
> +    if (!sps) {
> +        av_log(ctx->log_ctx, AV_LOG_ERROR, "SPS id %d not available.\n",
> +               pps->pps_seq_parameter_set_id);
> +        return AVERROR_INVALIDDATA;
> +    }
> +    vps = h266->vps[sps->sps_video_parameter_set_id];
> +    if (!vps) {
> +        av_log(ctx->log_ctx, AV_LOG_ERROR, "VPS id %d not available.\n",
> +               sps->sps_video_parameter_set_id);
> +        return AVERROR_INVALIDDATA;
> +    }
> +
> +    ub(sps->sps_log2_max_pic_order_cnt_lsb_minus4 + 4, ph_pic_order_cnt_lsb);
> +    if (current->ph_gdr_pic_flag)
> +        ue(ph_recovery_poc_cnt, 0,
> +           1 << (sps->sps_log2_max_pic_order_cnt_lsb_minus4 + 4));
> +
> +    for (i = 0; i < sps->sps_num_extra_ph_bytes * 8; i++) {
> +        if (sps->sps_extra_ph_bit_present_flag[i])
> +            flags(ph_extra_bit[i], 1, i);
> +    }
> +    if (sps->sps_poc_msb_cycle_flag) {
> +        flag(ph_poc_msb_cycle_present_flag);
> +        if (current->ph_poc_msb_cycle_present_flag)
> +            ub(sps->sps_poc_msb_cycle_len_minus1 + 1, ph_poc_msb_cycle_val);
> +    }
> +    if (sps->sps_alf_enabled_flag && pps->pps_alf_info_in_ph_flag) {
> +        flag(ph_alf_enabled_flag);
> +        if (current->ph_alf_enabled_flag) {
> +
> +            ub(3, ph_num_alf_aps_ids_luma);
> +            for (i = 0; i < current->ph_num_alf_aps_ids_luma; i++)
> +                ubs(3, ph_alf_aps_id_luma[i], 1, i);
> +
> +            if (sps->sps_chroma_format_idc != 0) {
> +                flag(ph_alf_cb_enabled_flag);
> +                flag(ph_alf_cr_enabled_flag);
> +            } else {
> +                infer(ph_alf_cb_enabled_flag, 0);
> +                infer(ph_alf_cr_enabled_flag, 0);
> +            }
> +
> +            if (current->ph_alf_cb_enabled_flag
> +                || current->ph_alf_cr_enabled_flag) {
> +                ub(3, ph_alf_aps_id_chroma);
> +            }
> +
> +            if (sps->sps_ccalf_enabled_flag) {
> +                flag(ph_alf_cc_cb_enabled_flag);
> +                if (current->ph_alf_cc_cb_enabled_flag)
> +                    ub(3, ph_alf_cc_cb_aps_id);
> +                flag(ph_alf_cc_cr_enabled_flag);
> +                if (current->ph_alf_cc_cr_enabled_flag)
> +                    ub(3, ph_alf_cc_cr_aps_id);
> +            }
> +        }
> +    } else {
> +        infer(ph_alf_enabled_flag, 0);
> +    }
> +    if (sps->sps_lmcs_enabled_flag) {
> +        flag(ph_lmcs_enabled_flag);
> +        if (current->ph_lmcs_enabled_flag) {
> +            ub(2, ph_lmcs_aps_id);
> +            if (sps->sps_chroma_format_idc != 0)
> +                flag(ph_chroma_residual_scale_flag);
> +            else
> +                infer(ph_chroma_residual_scale_flag, 0);
> +        }
> +    } else {
> +        infer(ph_lmcs_enabled_flag, 0);
> +        infer(ph_chroma_residual_scale_flag, 0);
> +    }
> +
> +    if (sps->sps_explicit_scaling_list_enabled_flag) {
> +        flag(ph_explicit_scaling_list_enabled_flag);
> +        if (current->ph_explicit_scaling_list_enabled_flag) {
> +            //todo: check the ph_scaling_list_aps_id range, when aps ready
> +            ub(3, ph_scaling_list_aps_id);
> +        }
> +    } else {
> +        infer(ph_explicit_scaling_list_enabled_flag, 0);
> +    }
> +    if (sps->sps_virtual_boundaries_enabled_flag &&
> +        !sps->sps_virtual_boundaries_present_flag) {
> +        flag(ph_virtual_boundaries_present_flag);
> +        if (current->ph_virtual_boundaries_present_flag) {
> +            ue(ph_num_ver_virtual_boundaries,
> +               0, pps->pps_pic_width_in_luma_samples <= 8 ? 0 : 3);
> +            for (i = 0; i < current->ph_num_ver_virtual_boundaries; i++) {
> +                ues(ph_virtual_boundary_pos_x_minus1[i],
> +                    0, (pps->pps_pic_width_in_luma_samples + 7) / 8 - 2, 1, i);
> +            }
> +            ue(ph_num_hor_virtual_boundaries,
> +               0, pps->pps_pic_height_in_luma_samples <= 8 ? 0 : 3);
> +            for (i = 0; i < current->ph_num_hor_virtual_boundaries; i++) {
> +                ues(ph_virtual_boundary_pos_y_minus1[i],
> +                    0, (pps->pps_pic_height_in_luma_samples + 7) / 8 - 2, 1, i);
> +            }
> +        } else {
> +            infer(ph_num_ver_virtual_boundaries, 0);
> +            infer(ph_num_hor_virtual_boundaries, 0);
> +        }
> +    }
> +    if (pps->pps_output_flag_present_flag && !current->ph_non_ref_pic_flag)
> +        flag(ph_pic_output_flag);
> +    else
> +        infer(ph_pic_output_flag, 1);
> +    if (pps->pps_rpl_info_in_ph_flag) {
> +        CHECK(FUNC(ref_pic_lists)
> +              (ctx, rw, sps, pps, &current->ph_ref_pic_lists));
> +    }
> +    if (sps->sps_partition_constraints_override_enabled_flag)
> +        flag(ph_partition_constraints_override_flag);
> +    else
> +        infer(ph_partition_constraints_override_flag, 0);
> +
> +    ctb_log2_size_y = sps->sps_log2_ctu_size_minus5 + 5;
> +    min_cb_log2_size_y = sps->sps_log2_min_luma_coding_block_size_minus2 + 2;
> +    if (current->ph_intra_slice_allowed_flag) {
> +        if (current->ph_partition_constraints_override_flag) {
> +            ue(ph_log2_diff_min_qt_min_cb_intra_slice_luma,
> +               0, FFMIN(6, ctb_log2_size_y) - min_cb_log2_size_y);
> +            ue(ph_max_mtt_hierarchy_depth_intra_slice_luma,
> +               0, 2 * (ctb_log2_size_y - min_cb_log2_size_y));
> +            if (current->ph_max_mtt_hierarchy_depth_intra_slice_luma != 0) {
> +                ue(ph_log2_diff_max_bt_min_qt_intra_slice_luma,
> +                   0, ctb_log2_size_y - min_qt_log2_size_intra_y);
> +                ue(ph_log2_diff_max_tt_min_qt_intra_slice_luma,
> +                   0, FFMIN(6, ctb_log2_size_y) - min_qt_log2_size_intra_y);
> +            } else {
> +                infer(ph_log2_diff_max_bt_min_qt_intra_slice_luma,
> +                      sps->sps_log2_diff_max_bt_min_qt_intra_slice_luma);
> +                infer(ph_log2_diff_max_tt_min_qt_intra_slice_luma,
> +                      sps->sps_log2_diff_max_tt_min_qt_intra_slice_luma);
> +            }
> +            if (sps->sps_qtbtt_dual_tree_intra_flag) {
> +                ue(ph_log2_diff_min_qt_min_cb_intra_slice_chroma,
> +                   0, FFMIN(6, ctb_log2_size_y) - min_cb_log2_size_y);
> +                ue(ph_max_mtt_hierarchy_depth_intra_slice_chroma,
> +                   0, 2 * (ctb_log2_size_y - min_cb_log2_size_y));
> +                if (sps->sps_max_mtt_hierarchy_depth_intra_slice_chroma != 0) {
> +                    unsigned int min_qt_log2_size_intra_c =
> +                        sps->sps_log2_diff_min_qt_min_cb_intra_slice_chroma +
> +                        min_cb_log2_size_y;
> +                    ue(ph_log2_diff_max_bt_min_qt_intra_slice_chroma,
> +                       0, FFMIN(6, ctb_log2_size_y) - min_qt_log2_size_intra_c);
> +                    ue(ph_log2_diff_max_tt_min_qt_intra_slice_chroma,
> +                       0, FFMIN(6, ctb_log2_size_y) - min_qt_log2_size_intra_c);
> +                } else {
> +                    infer(ph_log2_diff_max_bt_min_qt_intra_slice_chroma,
> +                          sps->sps_log2_diff_max_bt_min_qt_intra_slice_chroma);
> +                    infer(ph_log2_diff_max_tt_min_qt_intra_slice_chroma,
> +                          sps->sps_log2_diff_max_tt_min_qt_intra_slice_chroma);
> +                }
> +            }
> +        } else {
> +            infer(ph_log2_diff_min_qt_min_cb_intra_slice_luma,
> +                  sps->sps_log2_diff_min_qt_min_cb_intra_slice_luma);
> +            infer(ph_max_mtt_hierarchy_depth_intra_slice_luma,
> +                  sps->sps_max_mtt_hierarchy_depth_intra_slice_luma);
> +            infer(ph_log2_diff_max_bt_min_qt_intra_slice_luma,
> +                  sps->sps_log2_diff_max_bt_min_qt_intra_slice_luma);
> +            infer(ph_log2_diff_max_tt_min_qt_intra_slice_luma,
> +                  sps->sps_log2_diff_max_tt_min_qt_intra_slice_luma);
> +            infer(ph_log2_diff_min_qt_min_cb_intra_slice_chroma,
> +                  sps->sps_log2_diff_min_qt_min_cb_intra_slice_chroma);
> +            infer(ph_max_mtt_hierarchy_depth_intra_slice_chroma,
> +                  sps->sps_max_mtt_hierarchy_depth_intra_slice_chroma);
> +            infer(ph_log2_diff_max_bt_min_qt_intra_slice_chroma,
> +                  sps->sps_log2_diff_max_bt_min_qt_intra_slice_chroma);
> +            infer(ph_log2_diff_max_tt_min_qt_intra_slice_chroma,
> +                  sps->sps_log2_diff_max_tt_min_qt_intra_slice_chroma);
> +        }
> +
> +        min_qt_log2_size_intra_y =
> +            current->ph_log2_diff_min_qt_min_cb_intra_slice_luma +
> +            min_cb_log2_size_y;
> +        if (pps->pps_cu_qp_delta_enabled_flag)
> +            ue(ph_cu_qp_delta_subdiv_intra_slice, 0,
> +               2 * (ctb_log2_size_y - min_qt_log2_size_intra_y +
> +                    current->ph_max_mtt_hierarchy_depth_intra_slice_luma));
> +        else
> +            infer(ph_cu_qp_delta_subdiv_intra_slice, 0);
> +
> +        if (pps->pps_cu_chroma_qp_offset_list_enabled_flag)
> +            ue(ph_cu_chroma_qp_offset_subdiv_intra_slice, 0,
> +               2 * (ctb_log2_size_y - min_qt_log2_size_intra_y +
> +                    current->ph_max_mtt_hierarchy_depth_intra_slice_luma));
> +        else
> +            infer(ph_cu_chroma_qp_offset_subdiv_intra_slice, 0);
> +    }
> +    if (current->ph_inter_slice_allowed_flag) {
> +        if (current->ph_partition_constraints_override_flag) {
> +            ue(ph_log2_diff_min_qt_min_cb_inter_slice,
> +               0, FFMIN(6, ctb_log2_size_y) - min_cb_log2_size_y);
> +            min_qt_log2_size_inter_y =
> +                current->ph_log2_diff_min_qt_min_cb_inter_slice +
> +                min_cb_log2_size_y;
> +            ue(ph_max_mtt_hierarchy_depth_inter_slice, 0,
> +               2 * (ctb_log2_size_y - min_cb_log2_size_y));
> +            if (current->ph_max_mtt_hierarchy_depth_inter_slice != 0) {
> +                ue(ph_log2_diff_max_bt_min_qt_inter_slice,
> +                   0, ctb_log2_size_y - min_qt_log2_size_inter_y);
> +                ue(ph_log2_diff_max_tt_min_qt_inter_slice,
> +                   0, FFMIN(6, ctb_log2_size_y) - min_qt_log2_size_inter_y);
> +            }
> +        } else {
> +            infer(ph_log2_diff_min_qt_min_cb_inter_slice,
> +                  sps->sps_log2_diff_min_qt_min_cb_inter_slice);
> +            min_qt_log2_size_inter_y =
> +                current->ph_log2_diff_min_qt_min_cb_inter_slice +
> +                min_cb_log2_size_y;
> +            infer(ph_max_mtt_hierarchy_depth_inter_slice,
> +                  sps->sps_max_mtt_hierarchy_depth_inter_slice);
> +            infer(ph_log2_diff_max_bt_min_qt_inter_slice,
> +                  sps->sps_log2_diff_max_bt_min_qt_inter_slice);
> +            infer(ph_log2_diff_max_tt_min_qt_inter_slice,
> +                  sps->sps_log2_diff_max_tt_min_qt_inter_slice);
> +        }
> +
> +        if (pps->pps_cu_qp_delta_enabled_flag)
> +            ue(ph_cu_qp_delta_subdiv_inter_slice, 0,
> +               2 * (ctb_log2_size_y - min_qt_log2_size_inter_y +
> +                    current->ph_max_mtt_hierarchy_depth_inter_slice));
> +        else
> +            infer(ph_cu_qp_delta_subdiv_inter_slice, 0);
> +
> +        if (pps->pps_cu_chroma_qp_offset_list_enabled_flag)
> +            ue(ph_cu_chroma_qp_offset_subdiv_inter_slice, 0,
> +               2 * (ctb_log2_size_y - min_qt_log2_size_inter_y +
> +                    current->ph_max_mtt_hierarchy_depth_inter_slice));
> +        else
> +            infer(ph_cu_chroma_qp_offset_subdiv_inter_slice, 0);
> +        if (sps->sps_temporal_mvp_enabled_flag) {
> +            flag(ph_temporal_mvp_enabled_flag);
> +            if (current->ph_temporal_mvp_enabled_flag &&
> +                pps->pps_rpl_info_in_ph_flag) {
> +                if (current->ph_ref_pic_lists.rpl_ref_list[1].num_ref_entries > 0)
> +                    flag(ph_collocated_from_l0_flag);
> +                else
> +                    infer(ph_collocated_from_l0_flag, 1);
> +                if ((current->ph_collocated_from_l0_flag &&
> +                     current->ph_ref_pic_lists.rpl_ref_list[0].num_ref_entries > 1)
> +                     || (!current->ph_collocated_from_l0_flag &&
> +                         current->ph_ref_pic_lists.rpl_ref_list[1].num_ref_entries > 1)) {
> +                    unsigned int idx =
> +                        current->ph_collocated_from_l0_flag ? 0 : 1;
> +                    ue(ph_collocated_ref_idx, 0,
> +                       current->ph_ref_pic_lists.rpl_ref_list[idx].
> +                       num_ref_entries - 1);
> +                } else {
> +                    infer(ph_collocated_ref_idx, 0);
> +                }
> +            }
> +        }
> +        if (sps->sps_mmvd_fullpel_only_enabled_flag)
> +            flag(ph_mmvd_fullpel_only_flag);
> +        else
> +            infer(ph_mmvd_fullpel_only_flag, 0);
> +        if (!pps->pps_rpl_info_in_ph_flag ||
> +            current->ph_ref_pic_lists.rpl_ref_list[1].num_ref_entries > 0) {
> +            flag(ph_mvd_l1_zero_flag);
> +            if (sps->sps_bdof_control_present_in_ph_flag) {
> +                flag(ph_bdof_disabled_flag);
> +            } else {
> +                if (!sps->sps_bdof_control_present_in_ph_flag)
> +                    infer(ph_bdof_disabled_flag,
> +                          1 - sps->sps_bdof_enabled_flag);
> +                else
> +                    infer(ph_bdof_disabled_flag, 1);
> +            }
> +            if (sps->sps_dmvr_control_present_in_ph_flag) {
> +                flag(ph_dmvr_disabled_flag);
> +            } else {
> +                if (!sps->sps_dmvr_control_present_in_ph_flag)
> +                    infer(ph_dmvr_disabled_flag,
> +                          1 - sps->sps_dmvr_enabled_flag);
> +                else
> +                    infer(ph_dmvr_disabled_flag, 1);
> +            }
> +        } else {
> +            infer(ph_mvd_l1_zero_flag, 1);
> +        }
> +        if (sps->sps_prof_control_present_in_ph_flag)
> +            flag(ph_prof_disabled_flag);
> +        else
> +            infer(ph_prof_disabled_flag, !sps->sps_affine_prof_enabled_flag);
> +        if ((pps->pps_weighted_pred_flag ||
> +             pps->pps_weighted_bipred_flag) && pps->pps_wp_info_in_ph_flag) {
> +
> +            // if pps->pps_wp_info_in_ph_fla == 1
> +            // pred_weight_table will not use num_ref_idx_active
> +            uint8_t num_ref_idx_active[2] = { 0, 0 };
> +            CHECK(FUNC(pred_weight_table)
> +                  (ctx, rw, sps, pps, &current->ph_ref_pic_lists,
> +                   num_ref_idx_active, &current->ph_pred_weight_table));
> +        }
> +    }
> +
> +    qp_bd_offset = 6 * sps->sps_bitdepth_minus8;
> +    if (pps->pps_qp_delta_info_in_ph_flag)
> +        se(ph_qp_delta, -qp_bd_offset - (26 + pps->pps_init_qp_minus26),
> +           63 - (26 + pps->pps_init_qp_minus26));
> +
> +    if (sps->sps_joint_cbcr_enabled_flag)
> +        flag(ph_joint_cbcr_sign_flag);
> +    else
> +        infer(ph_joint_cbcr_sign_flag, 0);
> +    if (sps->sps_sao_enabled_flag && pps->pps_sao_info_in_ph_flag) {
> +        flag(ph_sao_luma_enabled_flag);
> +        if (sps->sps_chroma_format_idc != 0)
> +            flag(ph_sao_chroma_enabled_flag);
> +        else
> +            infer(ph_sao_chroma_enabled_flag, 0);
> +    } else {
> +        infer(ph_sao_luma_enabled_flag, 0);
> +        infer(ph_sao_chroma_enabled_flag, 0);
> +    }
> +
> +    if (pps->pps_dbf_info_in_ph_flag) {
> +        flag(ph_deblocking_params_present_flag);
> +        if (current->ph_deblocking_params_present_flag) {
> +            if (!pps->pps_deblocking_filter_disabled_flag) {
> +                flag(ph_deblocking_filter_disabled_flag);
> +            } else {
> +                if (pps->pps_deblocking_filter_disabled_flag &&
> +                    current->ph_deblocking_params_present_flag) {
> +                    infer(ph_deblocking_filter_disabled_flag, 0);
> +                } else {
> +                    infer(ph_deblocking_filter_disabled_flag,
> +                          pps->pps_deblocking_filter_disabled_flag);
> +                }
> +            }
> +            if (!current->ph_deblocking_filter_disabled_flag) {
> +                se(ph_luma_beta_offset_div2, -12, 12);
> +                se(ph_luma_tc_offset_div2, -12, 12);
> +                if (pps->pps_chroma_tool_offsets_present_flag) {
> +                    se(ph_cb_beta_offset_div2, -12, 12);
> +                    se(ph_cb_tc_offset_div2, -12, 12);
> +                    se(ph_cr_beta_offset_div2, -12, 12);
> +                    se(ph_cr_tc_offset_div2, -12, 12);
> +                } else {
> +                    infer(ph_cb_beta_offset_div2,
> +                          current->ph_luma_beta_offset_div2);
> +                    infer(ph_cb_tc_offset_div2,
> +                          current->ph_luma_tc_offset_div2);
> +                    infer(ph_cr_beta_offset_div2,
> +                          current->ph_luma_beta_offset_div2);
> +                    infer(ph_cr_tc_offset_div2,
> +                          current->ph_luma_tc_offset_div2);
> +                }
> +            } else {
> +                infer(ph_luma_beta_offset_div2, pps->pps_luma_beta_offset_div2);
> +                infer(ph_luma_tc_offset_div2, pps->pps_luma_tc_offset_div2);
> +                if (pps->pps_chroma_tool_offsets_present_flag) {
> +                    infer(ph_cb_beta_offset_div2, pps->pps_cb_beta_offset_div2);
> +                    infer(ph_cb_tc_offset_div2, pps->pps_cb_tc_offset_div2);
> +                    infer(ph_cr_beta_offset_div2, pps->pps_cr_beta_offset_div2);
> +                    infer(ph_cr_tc_offset_div2, pps->pps_cr_tc_offset_div2);
> +                } else {
> +                    infer(ph_cb_beta_offset_div2,
> +                          current->ph_luma_beta_offset_div2);
> +                    infer(ph_cb_tc_offset_div2,
> +                          current->ph_luma_tc_offset_div2);
> +                    infer(ph_cr_beta_offset_div2,
> +                          current->ph_luma_beta_offset_div2);
> +                    infer(ph_cr_tc_offset_div2,
> +                          current->ph_luma_tc_offset_div2);
> +                }
> +            }
> +        }
> +    }
> +
> +    if (pps->pps_picture_header_extension_present_flag) {
> +        ue(ph_extension_length, 0, 256);
> +        for (i = 0; i < current->ph_extension_length; i++)
> +            us(8, ph_extension_data_byte[i], 0x00, 0xff, 1, i);
> +    }
> +
> +    return 0;
> +}
> +
> +static int FUNC(ph) (CodedBitstreamContext *ctx, RWContext *rw,
> +                     H266RawPH *current)
> +{
> +    int err;
> +
> +    HEADER("Picture Header");
> +
> +    CHECK(FUNC(nal_unit_header) (ctx, rw, &current->nal_unit_header, VVC_PH_NUT));
> +    CHECK(FUNC(picture_header) (ctx, rw, current));
> +    CHECK(FUNC(rbsp_trailing_bits) (ctx, rw));
> +    return 0;
> +}
> +
> +static int FUNC(slice_header) (CodedBitstreamContext *ctx, RWContext *rw,
> +                               H266RawSliceHeader *current)
> +{
> +    CodedBitstreamH266Context *h266 = ctx->priv_data;
> +    const H266RawSPS *sps;
> +    const H266RawPPS *pps;
> +    const H266RawPH *ph;
> +    const H266RefPicLists *ref_pic_lists;
> +    int err, i;
> +    uint8_t nal_unit_type, qp_bd_offset;
> +    uint16_t curr_subpic_idx;
> +    uint16_t num_slices_in_subpic;
> +
> +    HEADER("Slice Header");
> +
> +    CHECK(FUNC(nal_unit_header) (ctx, rw, &current->nal_unit_header, -1));
> +
> +    flag(sh_picture_header_in_slice_header_flag);
> +    if (current->sh_picture_header_in_slice_header_flag) {
> +        CHECK(FUNC(picture_header) (ctx, rw, &current->sh_picture_header));
> +        ph = &current->sh_picture_header;
> +        //7.4.8 if sh_picture_header_in_slice_header_flag is true, we do not have PH NAL unit
> +        h266->priv.ph = NULL;
> +    } else {
> +        ph = h266->priv.ph;
> +        if (!ph) {
> +            av_log(ctx->log_ctx, AV_LOG_ERROR,
> +                   "Picture header not available.\n");
> +            return AVERROR_INVALIDDATA;
> +        }
> +    }
> +
> +    pps = h266->pps[ph->ph_pic_parameter_set_id];
> +    if (!pps) {
> +        av_log(ctx->log_ctx, AV_LOG_ERROR, "PPS id %d not available.\n",
> +               ph->ph_pic_parameter_set_id);
> +        return AVERROR_INVALIDDATA;
> +    }
> +    sps = h266->sps[pps->pps_seq_parameter_set_id];
> +    if (!sps) {
> +        av_log(ctx->log_ctx, AV_LOG_ERROR, "SPS id %d not available.\n",
> +               pps->pps_seq_parameter_set_id);
> +        return AVERROR_INVALIDDATA;
> +    }
> +
> +    if (sps->sps_subpic_info_present_flag) {
> +        ub(sps->sps_subpic_id_len_minus1 + 1, sh_subpic_id);
> +        if (sps->sps_subpic_id_mapping_explicitly_signalled_flag) {
> +            for (i = 0; i <= sps->sps_num_subpics_minus1; i++) {
> +                uint16_t subpic_id_val =
> +                    pps->pps_subpic_id_mapping_present_flag ?
> +                    pps->pps_subpic_id[i] : sps->sps_subpic_id[i];
> +                if (subpic_id_val == current->sh_subpic_id) {
> +                    curr_subpic_idx = i;
> +                    break;
> +                }
> +            }
> +        } else {
> +            curr_subpic_idx = current->sh_subpic_id;
> +            if (curr_subpic_idx > sps->sps_num_subpics_minus1) {
> +                av_log(ctx->log_ctx, AV_LOG_ERROR,
> +                       "sh_subpic_id(%d) should in range [0, %d]\n",
> +                       curr_subpic_idx, sps->sps_num_subpics_minus1);
> +                return AVERROR_INVALIDDATA;
> +            }
> +        }
> +    } else {
> +        curr_subpic_idx = 0;
> +    }
> +
> +    num_slices_in_subpic = pps->num_slices_in_subpic[curr_subpic_idx];
> +
> +    if ((pps->pps_rect_slice_flag && num_slices_in_subpic > 1) ||
> +        (!pps->pps_rect_slice_flag && pps->num_tiles_in_pic > 1)) {
> +        unsigned int bits, max;
> +        if (!pps->pps_rect_slice_flag) {
> +            bits = av_ceil_log2(pps->num_tiles_in_pic);
> +            max = pps->num_tiles_in_pic - 1;
> +        } else {
> +            bits = av_ceil_log2(num_slices_in_subpic);
> +            max = num_slices_in_subpic - 1;
> +        }
> +        u(bits, sh_slice_address, 0, max);
> +    } else {
> +        infer(sh_slice_address, 0);
> +    }
> +
> +    for (i = 0; i < sps->sps_num_extra_sh_bytes * 8; i++) {
> +        if (sps->sps_extra_sh_bit_present_flag[i])
> +            flags(sh_extra_bit[i], 1, i);
> +    }
> +
> +    if (!pps->pps_rect_slice_flag &&
> +        pps->num_tiles_in_pic - current->sh_slice_address > 1)
> +        ue(sh_num_tiles_in_slice_minus1, 0, pps->num_tiles_in_pic - 1);
> +    else
> +        infer(sh_num_tiles_in_slice_minus1, 0);
> +
> +    if (ph->ph_inter_slice_allowed_flag)
> +        ue(sh_slice_type, 0, 2);
> +    else
> +        infer(sh_slice_type, 2);
> +
> +    nal_unit_type = current->nal_unit_header.nal_unit_type;
> +    if (nal_unit_type == VVC_IDR_W_RADL || nal_unit_type == VVC_IDR_N_LP ||
> +        nal_unit_type == VVC_CRA_NUT || nal_unit_type == VVC_GDR_NUT)
> +        flag(sh_no_output_of_prior_pics_flag);
> +    if (sps->sps_alf_enabled_flag && !pps->pps_alf_info_in_ph_flag) {
> +        flag(sh_alf_enabled_flag);
> +        if (current->sh_alf_enabled_flag) {
> +            ub(3, sh_num_alf_aps_ids_luma);
> +            for (i = 0; i < current->sh_num_alf_aps_ids_luma; i++)
> +                ubs(3, sh_alf_aps_id_luma[i], 1, i);
> +            if (sps->sps_chroma_format_idc != 0) {
> +                flag(sh_alf_cb_enabled_flag);
> +                flag(sh_alf_cr_enabled_flag);
> +            } else {
> +                infer(sh_alf_cb_enabled_flag, ph->ph_alf_cb_enabled_flag);
> +                infer(sh_alf_cr_enabled_flag, ph->ph_alf_cr_enabled_flag);
> +            }
> +            if (current->sh_alf_cb_enabled_flag ||
> +                current->sh_alf_cr_enabled_flag)
> +                ub(3, sh_alf_aps_id_chroma);
> +            else
> +                infer(sh_alf_aps_id_chroma, ph->ph_alf_aps_id_chroma);
> +            if (sps->sps_ccalf_enabled_flag) {
> +                flag(sh_alf_cc_cb_enabled_flag);
> +                if (current->sh_alf_cc_cb_enabled_flag)
> +                    ub(3, sh_alf_cc_cb_aps_id);
> +                else
> +                    infer(sh_alf_cc_cb_aps_id, ph->ph_alf_cc_cb_aps_id);
> +                flag(sh_alf_cc_cr_enabled_flag);
> +                if (current->sh_alf_cc_cr_enabled_flag)
> +                    ub(3, sh_alf_cc_cr_aps_id);
> +                else
> +                    infer(sh_alf_cc_cr_aps_id, ph->ph_alf_cc_cr_aps_id);
> +            } else {
> +                infer(sh_alf_cc_cb_enabled_flag, ph->ph_alf_cc_cb_enabled_flag);
> +                infer(sh_alf_cc_cr_enabled_flag, ph->ph_alf_cc_cr_enabled_flag);
> +                infer(sh_alf_cc_cb_aps_id, ph->ph_alf_cc_cb_aps_id);
> +                infer(sh_alf_cc_cr_aps_id, ph->ph_alf_cc_cr_aps_id);
> +            }
> +        }
> +    } else {
> +        infer(sh_alf_enabled_flag, 0);
> +    }
> +
> +    if (ph->ph_lmcs_enabled_flag &&
> +        !current->sh_picture_header_in_slice_header_flag)
> +        flag(sh_lmcs_used_flag);
> +    else
> +        infer(sh_lmcs_used_flag, 0);
> +
> +    if (ph->ph_explicit_scaling_list_enabled_flag &&
> +        !current->sh_picture_header_in_slice_header_flag)
> +        flag(sh_explicit_scaling_list_used_flag);
> +    else
> +        infer(sh_explicit_scaling_list_used_flag, 0);
> +
> +    if (!pps->pps_rpl_info_in_ph_flag &&
> +        ((nal_unit_type != VVC_IDR_W_RADL &&
> +          nal_unit_type != VVC_IDR_N_LP) || sps->sps_idr_rpl_present_flag)) {
> +        CHECK(FUNC(ref_pic_lists)
> +              (ctx, rw, sps, pps, &current->sh_ref_pic_lists));
> +        ref_pic_lists = &current->sh_ref_pic_lists;
> +    } else {
> +        ref_pic_lists = &h266->priv.ph->ph_ref_pic_lists;
> +    }
> +    if ((current->sh_slice_type != VVC_SLICE_TYPE_I &&
> +         ref_pic_lists->rpl_ref_list[0].num_ref_entries > 1) ||
> +        (current->sh_slice_type == VVC_SLICE_TYPE_B &&
> +         ref_pic_lists->rpl_ref_list[1].num_ref_entries > 1)) {
> +        flag(sh_num_ref_idx_active_override_flag);
> +        if (current->sh_num_ref_idx_active_override_flag) {
> +            for (i = 0;
> +                 i < (current->sh_slice_type == VVC_SLICE_TYPE_B ? 2 : 1); i++)
> +                if (ref_pic_lists->rpl_ref_list[i].num_ref_entries > 1)
> +                    ues(sh_num_ref_idx_active_minus1[i], 0, 14, 1, i);
> +                else
> +                    infer(sh_num_ref_idx_active_minus1[i], 0);
> +        }
> +    } else {
> +        infer(sh_num_ref_idx_active_override_flag, 1);
> +    }
> +    if (current->sh_slice_type != VVC_SLICE_TYPE_I) {
> +        if (pps->pps_cabac_init_present_flag)
> +            flag(sh_cabac_init_flag);
> +        else
> +            infer(sh_cabac_init_flag, 0);
> +        if (ph->ph_temporal_mvp_enabled_flag && !pps->pps_rpl_info_in_ph_flag) {
> +            uint8_t num_ref_idx_active[2];
> +            for (i = 0; i < 2; i++) {
> +                if (current->sh_slice_type == VVC_SLICE_TYPE_B ||
> +                    (current->sh_slice_type == VVC_SLICE_TYPE_P && i == 0)) {
> +                    if (current->sh_num_ref_idx_active_override_flag) {
> +                        num_ref_idx_active[i] =
> +                            current->sh_num_ref_idx_active_minus1[i] + 1;
> +                    } else {
> +                        num_ref_idx_active[i] =
> +                            FFMIN(ref_pic_lists->rpl_ref_list[i].num_ref_entries,
> +                                  pps->pps_num_ref_idx_default_active_minus1[i] + 1);
> +                    }
> +                } else {
> +                    num_ref_idx_active[i] = 0;
> +                }
> +            }
> +
> +            if (current->sh_slice_type == VVC_SLICE_TYPE_B)
> +                flag(sh_collocated_from_l0_flag);
> +            else
> +                infer(sh_collocated_from_l0_flag, 1);
> +            if ((current->sh_collocated_from_l0_flag &&
> +                 num_ref_idx_active[0] > 1) ||
> +                (!current->sh_collocated_from_l0_flag &&
> +                 num_ref_idx_active[1] > 1)) {
> +                unsigned int idx = current->sh_collocated_from_l0_flag ? 0 : 1;
> +                ue(sh_collocated_ref_idx, 0, num_ref_idx_active[idx] - 1);
> +            } else {
> +                infer(sh_collocated_ref_idx, 0);
> +            }
> +            if (!pps->pps_wp_info_in_ph_flag &&
> +                ((pps->pps_weighted_pred_flag &&
> +                  current->sh_slice_type == VVC_SLICE_TYPE_P) ||
> +                 (pps->pps_weighted_bipred_flag &&
> +                  current->sh_slice_type == VVC_SLICE_TYPE_B))) {
> +                CHECK(FUNC(pred_weight_table) (ctx, rw, sps, pps, ref_pic_lists,
> +                                               num_ref_idx_active,
> +                                               &current->sh_pred_weight_table));
> +            }
> +        }
> +
> +    }
> +    qp_bd_offset = 6 * sps->sps_bitdepth_minus8;
> +    if (!pps->pps_qp_delta_info_in_ph_flag)
> +        se(sh_qp_delta, -qp_bd_offset - (26 + pps->pps_init_qp_minus26),
> +           63 - (26 + pps->pps_init_qp_minus26));
> +    if (pps->pps_slice_chroma_qp_offsets_present_flag) {
> +        int8_t off;
> +
> +        se(sh_cb_qp_offset, -12, 12);
> +        off = pps->pps_cb_qp_offset + current->sh_cb_qp_offset;
> +        if (off < -12 || off > 12) {
> +            av_log(ctx->log_ctx, AV_LOG_ERROR,
> +                   "pps_cb_qp_offset + sh_cb_qp_offset (%d) not in range [-12, 12].\n",
> +                   off);
> +            return AVERROR_INVALIDDATA;
> +        }
> +
> +        se(sh_cr_qp_offset, -12, 12);
> +        off = pps->pps_cr_qp_offset + current->sh_cr_qp_offset;
> +        if (off < -12 || off > 12) {
> +            av_log(ctx->log_ctx, AV_LOG_ERROR,
> +                   "pps_cr_qp_offset + sh_cr_qp_offset (%d) not in range [-12, 12].\n",
> +                   off);
> +            return AVERROR_INVALIDDATA;
> +        }
> +
> +        if (sps->sps_joint_cbcr_enabled_flag) {
> +            se(sh_joint_cbcr_qp_offset, -12, 12);
> +            off =
> +                pps->pps_joint_cbcr_qp_offset_value +
> +                current->sh_joint_cbcr_qp_offset;
> +            if (off < -12 || off > 12) {
> +                av_log(ctx->log_ctx, AV_LOG_ERROR,
> +                       "pps_joint_cbcr_qp_offset_value + sh_joint_cbcr_qp_offset (%d)"
> +                       "not in range [-12, 12]. \n", off);
> +                return AVERROR_INVALIDDATA;
> +            }
> +        } else {
> +            infer(sh_joint_cbcr_qp_offset, 0);
> +        }
> +    } else {
> +        infer(sh_cb_qp_offset, 0);
> +        infer(sh_cr_qp_offset, 0);
> +        infer(sh_joint_cbcr_qp_offset, 0);
> +    }
> +    if (pps->pps_cu_chroma_qp_offset_list_enabled_flag)
> +        flag(sh_cu_chroma_qp_offset_enabled_flag);
> +    else
> +        infer(sh_cu_chroma_qp_offset_enabled_flag, 0);
> +    if (sps->sps_sao_enabled_flag && !pps->pps_sao_info_in_ph_flag) {
> +        flag(sh_sao_luma_used_flag);
> +        if (sps->sps_chroma_format_idc != 0)
> +            flag(sh_sao_chroma_used_flag);
> +        else
> +            infer(sh_sao_chroma_used_flag, ph->ph_sao_chroma_enabled_flag);
> +    } else {
> +        infer(sh_sao_luma_used_flag, ph->ph_sao_luma_enabled_flag);
> +        infer(sh_sao_chroma_used_flag, ph->ph_sao_chroma_enabled_flag);
> +    }
> +
> +    if (pps->pps_deblocking_filter_override_enabled_flag &&
> +        !pps->pps_dbf_info_in_ph_flag)
> +        flag(sh_deblocking_params_present_flag);
> +    else
> +        infer(sh_deblocking_params_present_flag, 0);
> +    if (current->sh_deblocking_params_present_flag) {
> +        if (!pps->pps_deblocking_filter_disabled_flag)
> +            flag(sh_deblocking_filter_disabled_flag);
> +        else
> +            infer(sh_deblocking_filter_disabled_flag,
> +                  !(pps->pps_deblocking_filter_disabled_flag &&
> +                    current->sh_deblocking_params_present_flag));
> +        if (!current->sh_deblocking_filter_disabled_flag) {
> +            se(sh_luma_beta_offset_div2, -12, 12);
> +            se(sh_luma_tc_offset_div2, -12, 12);
> +            if (pps->pps_chroma_tool_offsets_present_flag) {
> +                se(sh_cb_beta_offset_div2, -12, 12);
> +                se(sh_cb_tc_offset_div2, -12, 12);
> +                se(sh_cr_beta_offset_div2, -12, 12);
> +                se(sh_cr_tc_offset_div2, -12, 12);
> +            } else {
> +                infer(sh_cb_beta_offset_div2,
> +                      current->sh_luma_beta_offset_div2);
> +                infer(sh_cb_tc_offset_div2, current->sh_luma_tc_offset_div2);
> +                infer(sh_cr_beta_offset_div2,
> +                      current->sh_luma_beta_offset_div2);
> +                infer(sh_cr_tc_offset_div2, current->sh_luma_tc_offset_div2);
> +            }
> +        } else {
> +            infer(sh_luma_beta_offset_div2, ph->ph_luma_beta_offset_div2);
> +            infer(sh_luma_tc_offset_div2, ph->ph_luma_tc_offset_div2);
> +            if (pps->pps_chroma_tool_offsets_present_flag) {
> +                infer(sh_cb_beta_offset_div2, ph->ph_cb_beta_offset_div2);
> +                infer(sh_cb_tc_offset_div2, ph->ph_cb_tc_offset_div2);
> +                infer(sh_cr_beta_offset_div2, ph->ph_cr_beta_offset_div2);
> +                infer(sh_cr_tc_offset_div2, ph->ph_cr_beta_offset_div2);
> +            } else {
> +                infer(sh_cb_beta_offset_div2,
> +                      current->sh_luma_beta_offset_div2);
> +                infer(sh_cb_tc_offset_div2, current->sh_luma_tc_offset_div2);
> +                infer(sh_cr_beta_offset_div2,
> +                      current->sh_luma_beta_offset_div2);
> +                infer(sh_cr_tc_offset_div2, current->sh_luma_tc_offset_div2);
> +            }
> +        }
> +    }
> +
> +    if (sps->sps_dep_quant_enabled_flag)
> +        flag(sh_dep_quant_used_flag);
> +    else
> +        infer(sh_dep_quant_used_flag, 0);
> +
> +    if (sps->sps_sign_data_hiding_enabled_flag &&
> +        !current->sh_dep_quant_used_flag)
> +        flag(sh_sign_data_hiding_used_flag);
> +    else
> +        infer(sh_sign_data_hiding_used_flag, 0);
> +
> +    if (sps->sps_transform_skip_enabled_flag &&
> +        !current->sh_dep_quant_used_flag &&
> +        !current->sh_sign_data_hiding_used_flag)
> +        flag(sh_ts_residual_coding_disabled_flag);
> +    else
> +        infer(sh_ts_residual_coding_disabled_flag, 0);
> +    if (pps->pps_slice_header_extension_present_flag) {
> +        ue(sh_slice_header_extension_length, 0, 256);
> +        for (i = 0; i < current->sh_slice_header_extension_length; i++)
> +            us(8, sh_slice_header_extension_data_byte[i], 0x00, 0xff, 1, i);
> +    }
> +    if (sps->sps_entry_point_offsets_present_flag) {
> +        int num_entry_points = 0;
> +        uint8_t entropy_sync = sps->sps_entropy_coding_sync_enabled_flag;
> +        int height;
> +        if (pps->pps_rect_slice_flag) {
> +            int width_in_tiles;
> +            int slice_idx = current->sh_slice_address;
> +            for (i = 0; i < curr_subpic_idx; i++) {
> +                slice_idx += pps->num_slices_in_subpic[i];
> +            }
> +            width_in_tiles =
> +                pps->pps_slice_width_in_tiles_minus1[slice_idx] + 1;
> +
> +            if (entropy_sync)
> +                height = pps->slice_height_in_ctus[slice_idx];
> +            else
> +                height = pps->pps_slice_height_in_tiles_minus1[slice_idx] + 1;
> +
> +            num_entry_points = width_in_tiles * height;
> +        } else {
> +            int tile_idx;
> +            int tile_y;
> +            for (tile_idx = current->sh_slice_address;
> +                 tile_idx <=
> +                 current->sh_slice_address +
> +                 current->sh_num_tiles_in_slice_minus1; tile_idx++) {
> +                tile_y = tile_idx / pps->num_tile_rows;
> +                height = pps->pps_tile_row_height_minus1[tile_y] + 1;
> +                num_entry_points += (entropy_sync ? height : 1);
> +            }
> +        }
> +        num_entry_points--;
> +        if (num_entry_points > VVC_MAX_ENTRY_POINTS) {
> +            av_log(ctx->log_ctx, AV_LOG_ERROR, "Too many entry points: "
> +                   "%" PRIu16 ".\n", num_entry_points);
> +            return AVERROR_PATCHWELCOME;
> +        }
> +        if (num_entry_points > 0) {
> +            ue(sh_entry_offset_len_minus1, 0, 31);
> +            for (i = 0; i < num_entry_points; i++) {
> +                ubs(current->sh_entry_offset_len_minus1 + 1,
> +                    sh_entry_point_offset_minus1[i], 1, i);
> +            }
> +        }
> +    }
> +    CHECK(FUNC(byte_alignment) (ctx, rw));
> +
> +    return 0;
> +}
> +
> +static int FUNC(sei_decoded_picture_hash) (CodedBitstreamContext *ctx,
> +                                           RWContext *rw,
> +                                           H266RawSEIDecodedPictureHash *
> +                                           current)
> +{
> +    int err, c_idx, i;
> +
> +    HEADER("Decoded Picture Hash");
> +
> +    u(8, dph_sei_hash_type, 0, 2);
> +    flag(dph_sei_single_component_flag);
> +    ub(7, dph_sei_reserved_zero_7bits);
> +
> +    for (c_idx = 0; c_idx < (current->dph_sei_single_component_flag ? 1 : 3);
> +         c_idx++) {
> +        if (current->dph_sei_hash_type == 0) {
> +            for (i = 0; i < 16; i++)
> +                us(8, dph_sei_picture_md5[c_idx][i], 0x00, 0xff, 2, c_idx, i);
> +        } else if (current->dph_sei_hash_type == 1) {
> +            us(16, dph_sei_picture_crc[c_idx], 0x0000, 0xffff, 1, c_idx);
> +        } else if (current->dph_sei_hash_type == 2) {
> +            us(32, dph_sei_picture_checksum[c_idx], 0x00000000, 0xffffffff, 1,
> +               c_idx);
> +        }
> +    }
> +    return 0;
> +}
> +
> +static int FUNC(sei) (CodedBitstreamContext *ctx, RWContext *rw,
> +                      H266RawSEI *current, int prefix)
> +{
> +    int err;
> +
> +    if (prefix)
> +        HEADER("Prefix Supplemental Enhancement Information");
> +    else
> +        HEADER("Suffix Supplemental Enhancement Information");
> +
> +    CHECK(FUNC(nal_unit_header) (ctx, rw, &current->nal_unit_header,
> +                                 prefix ? VVC_PREFIX_SEI_NUT
> +                                 : VVC_SUFFIX_SEI_NUT));
> +
> +    CHECK(FUNC_SEI(message_list) (ctx, rw, &current->message_list, prefix));
> +
> +    CHECK(FUNC(rbsp_trailing_bits) (ctx, rw));
> +
> +    return 0;
> +}
> diff --git a/libavcodec/cbs_internal.h b/libavcodec/cbs_internal.h
> index e585c77934..2de5c243b6 100644
> --- a/libavcodec/cbs_internal.h
> +++ b/libavcodec/cbs_internal.h
> @@ -245,6 +245,7 @@ int ff_cbs_write_signed(CodedBitstreamContext *ctx, PutBitContext *pbc,
> extern const CodedBitstreamType ff_cbs_type_av1;
> extern const CodedBitstreamType ff_cbs_type_h264;
> extern const CodedBitstreamType ff_cbs_type_h265;
> +extern const CodedBitstreamType ff_cbs_type_h266;
> extern const CodedBitstreamType ff_cbs_type_jpeg;
> extern const CodedBitstreamType ff_cbs_type_mpeg2;
> extern const CodedBitstreamType ff_cbs_type_vp9;
> diff --git a/libavcodec/cbs_sei.c b/libavcodec/cbs_sei.c
> index 50a513f592..bd7f6f4938 100644
> --- a/libavcodec/cbs_sei.c
> +++ b/libavcodec/cbs_sei.c
> @@ -20,6 +20,7 @@
> #include "cbs_internal.h"
> #include "cbs_h264.h"
> #include "cbs_h265.h"
> +#include "cbs_h266.h"
> #include "cbs_sei.h"
> 
> static void cbs_free_user_data_registered(void *opaque, uint8_t *data)
> @@ -132,6 +133,13 @@ static int cbs_sei_get_unit(CodedBitstreamContext *ctx,
>         else
>             sei_type = HEVC_NAL_SEI_SUFFIX;
>         break;
> +    case AV_CODEC_ID_H266:
> +        highest_vcl_type = VVC_RSV_IRAP_11;
> +        if (prefix)
> +            sei_type = VVC_PREFIX_SEI_NUT;
> +        else
> +            sei_type = VVC_SUFFIX_SEI_NUT;
> +        break;
>     default:
>         return AVERROR(EINVAL);
>     }
> @@ -207,6 +215,18 @@ static int cbs_sei_get_unit(CodedBitstreamContext *ctx,
>             memcpy(unit->content, &sei, sizeof(sei));
>         }
>         break;
> +    case AV_CODEC_ID_H266:
> +        {
> +            H266RawSEI sei = {
> +                .nal_unit_header = {
> +                    .nal_unit_type         = sei_type,
> +                    .nuh_layer_id          = 0,
> +                    .nuh_temporal_id_plus1 = 1,
> +                },
> +            };
> +            memcpy(unit->content, &sei, sizeof(sei));
> +        }
> +        break;
>     default:
>         av_assert0(0);
>     }
> @@ -237,6 +257,15 @@ static int cbs_sei_get_message_list(CodedBitstreamContext *ctx,
>             *list = &sei->message_list;
>         }
>         break;
> +    case AV_CODEC_ID_H266:
> +        {
> +            H266RawSEI *sei = unit->content;
> +            if (unit->type != VVC_PREFIX_SEI_NUT &&
> +                unit->type != VVC_SUFFIX_SEI_NUT)
> +                return AVERROR(EINVAL);
> +            *list = &sei->message_list;
> +        }
> +        break;
>     default:
>         return AVERROR(EINVAL);
>     }
> -- 
> 2.25.1
> 
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> ffmpeg-devel@ffmpeg.org
> https://ffmpeg.org/mailman/listinfo/ffmpeg-devel
> 
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> ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe".

On Wed, 1 Feb 2023 at 09:21, "zhilizhao(赵志立)" <quinkblack@foxmail.com>
wrote:

>
>
> > On Jan 3, 2023, at 21:40, Thomas Siedel <thomas.ff@spin-digital.com>
> wrote:
> ...
> > diff --git a/libavcodec/cbs_h2645.c b/libavcodec/cbs_h2645.c
> > index 4ee06003c3..8ae8ae6cda 100644
> > --- a/libavcodec/cbs_h2645.c
> > +++ b/libavcodec/cbs_h2645.c
> > @@ -24,10 +24,16 @@
> > #include "cbs_internal.h"
> > #include "cbs_h264.h"
> > #include "cbs_h265.h"
> > +#include "cbs_h266.h"
> > #include "h264.h"
> > #include "h2645_parse.h"
> > #include "hevc.h"
> > +#include "vvc.h"
> >
> > +static av_always_inline unsigned int h266_ceil(unsigned int v, unsigned
> int align)
> > +{
> > +    return (((v) + (align) - 1) / (align));
> > +}
>
> Does AV_CEIL_RSHIFT() work for the usecase?
>
>
Yes, it can be used instead. Thank you for the suggestion.
I changed it now in the new version of the patch set.