diff mbox series

[FFmpeg-devel,v1,05/11] avcodec: add MP4 to annexb support for H266/VVC

Message ID 20221019072508.23460-6-thomas.ff@spin-digital.com
State New
Headers show
Series Add support for H266/VVC | expand

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Commit Message

Thomas Siedel Oct. 19, 2022, 7:25 a.m. UTC
From: Thomas Siedel <thomas.ff@spin-digital.com>

Add parser for VVC MP4 to Annex B byte stream format.

Signed-off-by: Thomas Siedel <thomas.ff@spin-digital.com>
---
 configure                        |   1 +
 libavcodec/Makefile              |   2 +
 libavcodec/bitstream_filters.c   |   2 +
 libavcodec/h266_metadata_bsf.c   | 145 ++++++++++++++
 libavcodec/vvc_mp4toannexb_bsf.c | 318 +++++++++++++++++++++++++++++++
 5 files changed, 468 insertions(+)
 create mode 100644 libavcodec/h266_metadata_bsf.c
 create mode 100644 libavcodec/vvc_mp4toannexb_bsf.c
diff mbox series

Patch

diff --git a/configure b/configure
index 13dca5cd9a..30df2cb0a4 100755
--- a/configure
+++ b/configure
@@ -3298,6 +3298,7 @@  mjpeg2jpeg_bsf_select="jpegtables"
 mpeg2_metadata_bsf_select="cbs_mpeg2"
 trace_headers_bsf_select="cbs"
 vp9_metadata_bsf_select="cbs_vp9"
+vvc_metadata_bsf_select="cbs_h266"
 
 # external libraries
 aac_at_decoder_deps="audiotoolbox"
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index 3850e316ac..53a8dc67cb 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -1222,6 +1222,8 @@  OBJS-$(CONFIG_VP9_METADATA_BSF)           += vp9_metadata_bsf.o
 OBJS-$(CONFIG_VP9_RAW_REORDER_BSF)        += vp9_raw_reorder_bsf.o
 OBJS-$(CONFIG_VP9_SUPERFRAME_BSF)         += vp9_superframe_bsf.o
 OBJS-$(CONFIG_VP9_SUPERFRAME_SPLIT_BSF)   += vp9_superframe_split_bsf.o
+OBJS-$(CONFIG_VVC_METADATA_BSF)           += h266_metadata_bsf.o
+OBJS-$(CONFIG_VVC_MP4TOANNEXB_BSF)        += vvc_mp4toannexb_bsf.o
 
 # thread libraries
 OBJS-$(HAVE_LIBC_MSVCRT)               += file_open.o
diff --git a/libavcodec/bitstream_filters.c b/libavcodec/bitstream_filters.c
index a3bebefe5f..403884f3d7 100644
--- a/libavcodec/bitstream_filters.c
+++ b/libavcodec/bitstream_filters.c
@@ -64,6 +64,8 @@  extern const FFBitStreamFilter ff_vp9_metadata_bsf;
 extern const FFBitStreamFilter ff_vp9_raw_reorder_bsf;
 extern const FFBitStreamFilter ff_vp9_superframe_bsf;
 extern const FFBitStreamFilter ff_vp9_superframe_split_bsf;
+extern const FFBitStreamFilter ff_vvc_mp4toannexb_bsf;
+extern const FFBitStreamFilter ff_vvc_metadata_bsf;
 
 #include "libavcodec/bsf_list.c"
 
diff --git a/libavcodec/h266_metadata_bsf.c b/libavcodec/h266_metadata_bsf.c
new file mode 100644
index 0000000000..bc3c10f581
--- /dev/null
+++ b/libavcodec/h266_metadata_bsf.c
@@ -0,0 +1,145 @@ 
+/*
+ * 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
+ */
+
+#include "libavutil/common.h"
+#include "libavutil/opt.h"
+
+#include "bsf.h"
+#include "bsf_internal.h"
+#include "cbs.h"
+#include "cbs_bsf.h"
+#include "cbs_h266.h"
+#include "vvc.h"
+
+#define IS_SLICE(nut) (nut <= VVC_RASL_NUT || (nut >= VVC_IDR_W_RADL && nut <= VVC_GDR_NUT))
+#define IS_PH(nut) (nut == VVC_PH_NUT)
+
+typedef struct VVCMetadataContext {
+    CBSBSFContext common;
+
+    H266RawAUD aud_nal;
+
+    int aud;
+} VVCMetadataContext;
+
+static int h266_metadata_update_fragment(AVBSFContext *bsf, AVPacket *pkt,
+                                         CodedBitstreamFragment *pu)
+{
+    VVCMetadataContext *ctx = bsf->priv_data;
+    int err, i;
+
+    // If an AUD is present, it must be the first NAL unit.
+    if (pu->units[0].type == VVC_AUD_NUT) {
+        if (ctx->aud == BSF_ELEMENT_REMOVE)
+            ff_cbs_delete_unit(pu, 0);
+    } else {
+        if (ctx->aud == BSF_ELEMENT_INSERT) {
+            const H266RawSlice *first_slice = NULL;
+            const H266RawPH    *ph = NULL;
+            H266RawAUD *aud = &ctx->aud_nal;
+            int pic_type = 0, temporal_id = 8, layer_id = 0;
+            for (i = 0; i < pu->nb_units; i++) {
+                const H266RawNALUnitHeader *nal = pu->units[i].content;
+                if (!nal)
+                    continue;
+                if (nal->nuh_temporal_id_plus1 < temporal_id + 1)
+                    temporal_id = nal->nuh_temporal_id_plus1 - 1;
+                if (IS_PH(nal->nal_unit_type)) {
+                    ph = pu->units[i].content;
+                } else if(IS_SLICE(nal->nal_unit_type)) {
+                    const H266RawSlice *slice = pu->units[i].content;
+                    layer_id = nal->nuh_layer_id;
+                    if (slice->header.sh_slice_type == VVC_SLICE_TYPE_B &&
+                        pic_type < 2)
+                        pic_type = 2;
+                    if (slice->header.sh_slice_type == VVC_SLICE_TYPE_P &&
+                        pic_type < 1)
+                        pic_type = 1;
+                    if (!first_slice) {
+                        first_slice = slice;
+                        if (first_slice->header.sh_picture_header_in_slice_header_flag)
+                            ph = &first_slice->header.sh_picture_header;
+                        else if (!ph)
+                            break;
+                    }
+                }
+            }
+            if (!ph) {
+                av_log(bsf, AV_LOG_ERROR, "no avaliable picture header");
+                return AVERROR_INVALIDDATA;
+            }
+
+            aud->nal_unit_header = (H266RawNALUnitHeader) {
+                .nal_unit_type         = VVC_AUD_NUT,
+                .nuh_layer_id          = layer_id,
+                .nuh_temporal_id_plus1 = temporal_id + 1,
+            };
+            aud->aud_pic_type = pic_type;
+            aud->aud_irap_or_gdr_flag = ph->ph_gdr_or_irap_pic_flag;
+
+            err = ff_cbs_insert_unit_content(pu, 0, VVC_AUD_NUT, aud, NULL);
+            if (err < 0) {
+                av_log(bsf, AV_LOG_ERROR, "Failed to insert AUD.\n");
+                return err;
+            }
+        }
+    }
+    return 0;
+}
+
+static const CBSBSFType h266_metadata_type = {
+    .codec_id        = AV_CODEC_ID_VVC,
+    .fragment_name   = "access unit",
+    .unit_name       = "NAL unit",
+    .update_fragment = &h266_metadata_update_fragment,
+};
+
+static int vvc_metadata_init(AVBSFContext *bsf)
+{
+    return ff_cbs_bsf_generic_init(bsf, &h266_metadata_type);
+}
+
+#define OFFSET(x) offsetof(VVCMetadataContext, x)
+#define FLAGS (AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_BSF_PARAM)
+static const AVOption vvc_metadata_options[] = {
+    BSF_ELEMENT_OPTIONS_PIR("aud", "Access Unit Delimiter NAL units",
+                            aud, FLAGS),
+
+    { NULL }
+};
+
+static const AVClass vvc_metadata_class = {
+    .class_name = "vvc_metadata_bsf",
+    .item_name  = av_default_item_name,
+    .option     = vvc_metadata_options,
+    .version    = LIBAVUTIL_VERSION_INT,
+};
+
+static const enum AVCodecID vvc_metadata_codec_ids[] = {
+    AV_CODEC_ID_VVC, AV_CODEC_ID_NONE,
+};
+
+const FFBitStreamFilter ff_vvc_metadata_bsf = {
+    .p.name         = "vvc_metadata",
+    .p.codec_ids    = vvc_metadata_codec_ids,
+    .p.priv_class   = &vvc_metadata_class,
+    .priv_data_size = sizeof(VVCMetadataContext),
+    .init           = &vvc_metadata_init,
+    .close          = &ff_cbs_bsf_generic_close,
+    .filter         = &ff_cbs_bsf_generic_filter,
+};
diff --git a/libavcodec/vvc_mp4toannexb_bsf.c b/libavcodec/vvc_mp4toannexb_bsf.c
new file mode 100644
index 0000000000..d6415dba7b
--- /dev/null
+++ b/libavcodec/vvc_mp4toannexb_bsf.c
@@ -0,0 +1,318 @@ 
+/*
+ * VVC MP4 to Annex B byte stream format filter
+ * Copyright (c) 2022, Thomas Siedel
+ *
+ * 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
+ */
+
+#include <string.h>
+
+#include "libavutil/intreadwrite.h"
+#include "libavutil/mem.h"
+
+#include "avcodec.h"
+#include "bsf.h"
+#include "bsf_internal.h"
+#include "bytestream.h"
+#include "vvc.h"
+
+#include "libavcodec/get_bits.h"
+
+#define MIN_VVCC_LENGTH 23
+
+typedef struct VVCBSFContext {
+    uint8_t  length_size;
+    int      extradata_parsed;
+} VVCBSFContext;
+
+static int vvc_extradata_to_annexb(AVBSFContext *ctx)
+{
+    GetByteContext gb;
+    int length_size, num_arrays, i, j;
+    int ret = 0;
+    int temp = 0;
+    int ptl_present;
+
+    uint8_t *new_extradata = NULL;
+    size_t   new_extradata_size = 0;
+
+    int max_picture_width = 0;
+    int max_picture_height = 0;
+    int avg_frame_rate = 0;
+
+    bytestream2_init(&gb, ctx->par_in->extradata, ctx->par_in->extradata_size);
+    temp = bytestream2_get_byte(&gb);
+    length_size = (( temp & 6) >> 1) + 1;
+    ptl_present = temp & 1;
+    if (ptl_present) {
+        int num_bytes_constraint_info;
+        int general_profile_idc;
+        int general_tier_flag;
+        int general_level_idc;
+        int ptl_frame_only_constraint_flag;
+        int ptl_multi_layer_enabled_flag;
+        int ptl_num_sub_profiles;
+        int temp3, temp4, temp5;
+        int temp2 = bytestream2_get_be16(&gb);
+        int ols_idx  = (temp2 >> 7) & 0x1ff;
+        int num_sublayers  = (temp2 >> 4) & 0x7;
+        int constant_frame_rate = (temp2 >> 2) & 0x3;
+        int chroma_format_idc = temp2 & 0x3;
+        int bit_depth_minus8 = (bytestream2_get_byte(&gb) >> 5) & 0x7;
+        av_log(ctx, AV_LOG_DEBUG,
+            "bit_depth_minus8 %d chroma_format_idc %d\n", bit_depth_minus8, chroma_format_idc);
+        av_log(ctx, AV_LOG_DEBUG,
+            "constant_frame_rate %d, ols_idx %d\n", constant_frame_rate, ols_idx);
+        // VvcPTLRecord(num_sublayers) native_ptl
+        temp3 = bytestream2_get_byte(&gb);
+        num_bytes_constraint_info = (temp3) & 0x3f;
+        temp4 = bytestream2_get_byte(&gb);
+        general_profile_idc = (temp4 >> 1) & 0x7f;
+        general_tier_flag = (temp4) & 1;
+        general_level_idc = bytestream2_get_byte(&gb);
+        av_log(ctx, AV_LOG_DEBUG,
+            "general_profile_idc %d, general_tier_flag %d, general_level_idc %d, num_sublayers %d num_bytes_constraint_info %d\n", general_profile_idc, general_tier_flag, general_level_idc, num_sublayers, num_bytes_constraint_info);
+
+        temp5 = bytestream2_get_byte(&gb);
+        ptl_frame_only_constraint_flag = (temp5 >> 7) & 0x1;
+        ptl_multi_layer_enabled_flag   = (temp5 >> 6) & 0x1;
+        for (i = 0; i < num_bytes_constraint_info-1; i++) {
+            // unsigned int(8*num_bytes_constraint_info - 2) general_constraint_info;
+            bytestream2_get_byte(&gb);
+        }
+
+        av_log(ctx, AV_LOG_DEBUG,
+            "ptl_multi_layer_enabled_flag %d, ptl_frame_only_constraint_flag %d\n",ptl_multi_layer_enabled_flag, ptl_frame_only_constraint_flag);
+
+        if( num_sublayers > 1 )
+        {
+            int temp6 = bytestream2_get_byte(&gb);
+            uint8_t ptl_sublayer_level_present_flag[8] = {0};
+            //uint8_t sublayer_level_idc[8] = {0};
+            for (i=num_sublayers - 2; i >= 0; i--){
+                ptl_sublayer_level_present_flag[i] = (temp6 >> (7 - (num_sublayers - 2 - i))) & 0x01;
+            }
+            // for (j=num_sublayers; j<=8 && num_sublayers > 1; j++)
+            //     bit(1) ptl_reserved_zero_bit = 0;
+            for (i=num_sublayers-2; i >= 0; i--)
+            {
+                if (ptl_sublayer_level_present_flag[i]) {
+                    //sublayer_level_idc[i] = bytestream2_get_byte(&gb);
+                }
+            }
+        }
+
+        ptl_num_sub_profiles = bytestream2_get_byte(&gb);
+        for (j=0; j < ptl_num_sub_profiles; j++) {
+            // unsigned int(32) general_sub_profile_idc[j];
+            bytestream2_get_be16(&gb);
+            bytestream2_get_be16(&gb);
+        }
+
+        max_picture_width = bytestream2_get_be16(&gb); // unsigned_int(16) max_picture_width;
+        max_picture_height = bytestream2_get_be16(&gb); // unsigned_int(16) max_picture_height;
+        avg_frame_rate = bytestream2_get_be16(&gb); // unsigned int(16) avg_frame_rate;	}
+        av_log(ctx, AV_LOG_DEBUG,
+            "max_picture_width %d, max_picture_height %d, avg_frame_rate %d\n", max_picture_width, max_picture_height, avg_frame_rate);
+    }
+
+    num_arrays  = bytestream2_get_byte(&gb);
+
+    for (i = 0; i < num_arrays; i++) {
+        int cnt;
+        int type = bytestream2_get_byte(&gb) & 0x1f;
+
+        if (type != VVC_OPI_NUT || type != VVC_DCI_NUT)
+            cnt  = bytestream2_get_be16(&gb);
+        else
+            cnt = 1;
+
+        av_log(ctx, AV_LOG_DEBUG,
+            "nalu_type %d cnt %d\n", type, cnt);
+
+        if (!(type == VVC_VPS_NUT || type == VVC_SPS_NUT || type == VVC_PPS_NUT ||
+              type == VVC_PREFIX_SEI_NUT || type == VVC_SUFFIX_SEI_NUT)) {
+            av_log(ctx, AV_LOG_ERROR, "Invalid NAL unit type in extradata: %d\n", type);
+            ret = AVERROR_INVALIDDATA;
+            goto fail;
+        }
+
+        for (j = 0; j < cnt; j++) {
+            int nalu_len = bytestream2_get_be16(&gb);
+
+            if (4 + AV_INPUT_BUFFER_PADDING_SIZE + nalu_len > SIZE_MAX - new_extradata_size) {
+                ret = AVERROR_INVALIDDATA;
+                goto fail;
+            }
+            ret = av_reallocp(&new_extradata, new_extradata_size + nalu_len + 4 + AV_INPUT_BUFFER_PADDING_SIZE);
+            if (ret < 0)
+                goto fail;
+
+            AV_WB32(new_extradata + new_extradata_size, 1); // add the startcode
+            bytestream2_get_buffer(&gb, new_extradata + new_extradata_size + 4, nalu_len);
+            new_extradata_size += 4 + nalu_len;
+            memset(new_extradata + new_extradata_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
+        }
+    }
+
+    av_freep(&ctx->par_out->extradata);
+    ctx->par_out->extradata      = new_extradata;
+    ctx->par_out->extradata_size = new_extradata_size;
+
+    if (!new_extradata_size)
+        av_log(ctx, AV_LOG_WARNING, "No parameter sets in the extradata\n");
+
+    return length_size;
+fail:
+    av_freep(&new_extradata);
+    return ret;
+}
+
+static int vvc_mp4toannexb_init(AVBSFContext *ctx)
+{
+    VVCBSFContext *s = ctx->priv_data;
+    int ret;
+
+    if (ctx->par_in->extradata_size < MIN_VVCC_LENGTH ||
+        AV_RB24(ctx->par_in->extradata) == 1           ||
+        AV_RB32(ctx->par_in->extradata) == 1) {
+        av_log(ctx, AV_LOG_VERBOSE, "The input looks like it is Annex B already\n");
+    } else {
+        ret = vvc_extradata_to_annexb(ctx);
+        if (ret < 0)
+            return ret;
+        s->length_size      = ret;
+        s->extradata_parsed = 1;
+    }
+
+    return 0;
+}
+
+static int vvc_mp4toannexb_filter(AVBSFContext *ctx, AVPacket *out)
+{
+    VVCBSFContext *s = ctx->priv_data;
+    AVPacket *in;
+    GetByteContext gb;
+
+    int is_irap  = 0;
+    int added_extra = 0;
+    int i, ret = 0;
+
+    ret = ff_bsf_get_packet(ctx, &in);
+    if (ret < 0)
+        return ret;
+
+    if (!s->extradata_parsed) {
+        av_packet_move_ref(out, in);
+        av_packet_free(&in);
+        return 0;
+    }
+
+    bytestream2_init(&gb, in->data, in->size);
+
+    /* check if this packet contains an IRAP. The extradata will need to be added before any potential PH_NUT */
+    while (bytestream2_get_bytes_left(&gb)) {
+        uint32_t nalu_size = 0;
+        int      nalu_type;
+
+        if (bytestream2_get_bytes_left(&gb) < s->length_size) {
+            ret = AVERROR_INVALIDDATA;
+            goto fail;
+        }
+
+        for (i = 0; i < s->length_size; i++)
+            nalu_size = (nalu_size << 8) | bytestream2_get_byte(&gb);
+
+        if (nalu_size < 2 || nalu_size > bytestream2_get_bytes_left(&gb)) {
+            ret = AVERROR_INVALIDDATA;
+            goto fail;
+        }
+
+        nalu_type = (bytestream2_peek_be16(&gb) >> 3) & 0x1f;
+        is_irap   = nalu_type >= VVC_IDR_W_RADL && nalu_type <= VVC_RSV_IRAP_11;
+        if (is_irap) {
+          break;
+        }
+        bytestream2_seek(&gb, nalu_size, SEEK_CUR);
+    }
+
+    bytestream2_seek(&gb, 0, SEEK_SET);
+    while (bytestream2_get_bytes_left(&gb)) {
+        uint32_t nalu_size = 0;
+        int      nalu_type;
+        int add_extradata, extra_size, prev_size;
+
+        if (bytestream2_get_bytes_left(&gb) < s->length_size) {
+            ret = AVERROR_INVALIDDATA;
+            goto fail;
+        }
+
+        for (i = 0; i < s->length_size; i++)
+            nalu_size = (nalu_size << 8) | bytestream2_get_byte(&gb);
+
+        if (nalu_size < 2 || nalu_size > bytestream2_get_bytes_left(&gb)) {
+            ret = AVERROR_INVALIDDATA;
+            goto fail;
+        }
+
+        nalu_type = (bytestream2_peek_be16(&gb) >> 3) & 0x1f;
+
+        /* prepend extradata to IRAP frames */
+        add_extradata = is_irap && nalu_type != VVC_AUD_NUT && !added_extra;
+        extra_size    = add_extradata * ctx->par_out->extradata_size;
+        added_extra  |= add_extradata;
+
+        if (FFMIN(INT_MAX, SIZE_MAX) < 4ULL + nalu_size + extra_size) {
+            ret = AVERROR_INVALIDDATA;
+            goto fail;
+        }
+
+        prev_size = out->size;
+
+        ret = av_grow_packet(out, 4 + nalu_size + extra_size);
+        if (ret < 0)
+            goto fail;
+
+        if (extra_size)
+            memcpy(out->data + prev_size, ctx->par_out->extradata, extra_size);
+        AV_WB32(out->data + prev_size + extra_size, 1);
+        bytestream2_get_buffer(&gb, out->data + prev_size + 4 + extra_size, nalu_size);
+    }
+
+    ret = av_packet_copy_props(out, in);
+    if (ret < 0)
+        goto fail;
+
+fail:
+    if (ret < 0)
+        av_packet_unref(out);
+    av_packet_free(&in);
+
+    return ret;
+}
+
+static const enum AVCodecID codec_ids[] = {
+    AV_CODEC_ID_VVC, AV_CODEC_ID_NONE,
+};
+
+const FFBitStreamFilter ff_vvc_mp4toannexb_bsf = {
+    .p.name           = "vvc_mp4toannexb",
+    .p.codec_ids      = codec_ids,
+    .priv_data_size = sizeof(VVCBSFContext),
+    .init           = vvc_mp4toannexb_init,
+    .filter         = vvc_mp4toannexb_filter,
+};