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[FFmpeg-devel,v4,6/9] avcodec: add vvc parser

Message ID 20210125141507.11012-7-nuomi2021@gmail.com
State Superseded
Headers show
Series add vvc raw demuxer, muxer, parser, metadata bsf
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Commit Message

Nuo Mi Jan. 25, 2021, 2:15 p.m. UTC
---
 configure               |   1 +
 libavcodec/Makefile     |   1 +
 libavcodec/parsers.c    |   1 +
 libavcodec/vvc_parser.c | 299 ++++++++++++++++++++++++++++++++++++++++
 4 files changed, 302 insertions(+)
 create mode 100644 libavcodec/vvc_parser.c
diff mbox series

Patch

diff --git a/configure b/configure
index d55cd0a79e..74ff58d7b7 100755
--- a/configure
+++ b/configure
@@ -3167,6 +3167,7 @@  mpegaudio_parser_select="mpegaudioheader"
 mpegvideo_parser_select="mpegvideo"
 mpeg4video_parser_select="h263dsp mpegvideo qpeldsp"
 vc1_parser_select="vc1dsp"
+vcc_parser_select="cbs_h266"
 
 # bitstream_filters
 aac_adtstoasc_bsf_select="adts_header"
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index 0d7a417180..e736c8300a 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -1126,6 +1126,7 @@  OBJS-$(CONFIG_VC1_PARSER)              += vc1_parser.o vc1.o vc1data.o  \
 OBJS-$(CONFIG_VP3_PARSER)              += vp3_parser.o
 OBJS-$(CONFIG_VP8_PARSER)              += vp8_parser.o
 OBJS-$(CONFIG_VP9_PARSER)              += vp9_parser.o
+OBJS-$(CONFIG_VVC_PARSER)              += vvc_parser.o
 OBJS-$(CONFIG_WEBP_PARSER)             += webp_parser.o
 OBJS-$(CONFIG_XMA_PARSER)              += xma_parser.o
 
diff --git a/libavcodec/parsers.c b/libavcodec/parsers.c
index 3156b86b03..9c246165c4 100644
--- a/libavcodec/parsers.c
+++ b/libavcodec/parsers.c
@@ -71,6 +71,7 @@  extern AVCodecParser ff_vorbis_parser;
 extern AVCodecParser ff_vp3_parser;
 extern AVCodecParser ff_vp8_parser;
 extern AVCodecParser ff_vp9_parser;
+extern AVCodecParser ff_vvc_parser;
 extern AVCodecParser ff_webp_parser;
 extern AVCodecParser ff_xma_parser;
 
diff --git a/libavcodec/vvc_parser.c b/libavcodec/vvc_parser.c
new file mode 100644
index 0000000000..b160ef9426
--- /dev/null
+++ b/libavcodec/vvc_parser.c
@@ -0,0 +1,299 @@ 
+/*
+ * VVC parser
+ *
+ * Copyright (C) 2029 Nuo Mi <nuomi2021@gmail.com>
+ *
+ * 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 "cbs.h"
+#include "cbs_h266.h"
+#include "internal.h"
+#include "parser.h"
+
+#define START_CODE 0x000001 ///< start_code_prefix_one_3bytes
+
+#define IS_SLICE(nut) (nut <= VVC_RASL_NUT || (nut >= VVC_IDR_W_RADL && nut <= VVC_GDR_NUT))
+
+typedef struct VVCParserContext {
+    ParseContext pc;
+    CodedBitstreamContext *cbc;
+    CodedBitstreamFragment picture_unit;
+    int parsed_extradata;
+} VVCParserContext;
+
+static const enum AVPixelFormat pix_fmts_8bit[] = {
+    AV_PIX_FMT_GRAY8, AV_PIX_FMT_YUV420P,
+    AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P
+};
+
+static const enum AVPixelFormat pix_fmts_10bit[] = {
+    AV_PIX_FMT_GRAY10, AV_PIX_FMT_YUV420P10,
+    AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10
+};
+
+static int get_format(const H266RawSPS* sps)
+{
+    switch (sps->sps_bitdepth_minus8) {
+        case 0:
+            return pix_fmts_8bit[sps->sps_chroma_format_idc];
+        case 2:
+            return pix_fmts_10bit[sps->sps_chroma_format_idc];
+    }
+    return AV_PIX_FMT_NONE;
+}
+
+/**
+ * Find the end of the current frame in the bitstream.
+ * @return the position of the first byte of the next frame, or END_NOT_FOUND
+ */
+static int find_frame_end(AVCodecParserContext *s, const uint8_t *buf,
+                               int buf_size)
+{
+    VVCParserContext *ctx = s->priv_data;
+    ParseContext       *pc = &ctx->pc;
+    int i;
+
+    for (i = 0; i < buf_size; i++) {
+        int nut;
+
+        pc->state64 = (pc->state64 << 8) | buf[i];
+
+        if (((pc->state64 >> 3 * 8) & 0xFFFFFF) != START_CODE)
+            continue;
+
+        nut = (pc->state64 >> (8 + 3)) & 0x1F;
+        // Beginning of picture unit
+        if ((nut >= VVC_OPI_NUT && nut <= VVC_EOB_NUT && nut != VVC_PH_NUT) ||
+            nut == VVC_PREFIX_SEI_NUT ||
+            (nut >= VVC_RSV_NVCL_26 && nut <= VVC_UNSPEC_31)) {
+            if (pc->frame_start_found) {
+                pc->frame_start_found = 0;
+                return i - 5;
+            }
+        } else if (nut == VVC_PH_NUT  || IS_SLICE(nut)) {
+            int sh_picture_header_in_slice_header_flag = buf[i] >> 7;
+
+            if (nut == VVC_PH_NUT || sh_picture_header_in_slice_header_flag) {
+                if (!pc->frame_start_found) {
+                    pc->frame_start_found = 1;
+                } else { // First slice of next frame found
+                    pc->frame_start_found = 0;
+                    return i - 5;
+                }
+            }
+        }
+    }
+    return END_NOT_FOUND;
+}
+
+static int get_pict_type(const CodedBitstreamFragment *pu)
+{
+    int has_p = 0;
+    for (int i = 0; i < pu->nb_units; i++) {
+        CodedBitstreamUnit *unit = &pu->units[i];
+        if (IS_SLICE(unit->type)) {
+            const H266RawSlice *slice = unit->content;
+            uint8_t type = slice->header.sh_slice_type;
+            if (type == VVC_SLICE_TYPE_B) {
+                return AV_PICTURE_TYPE_B;
+            }
+            if (type == VVC_SLICE_TYPE_P) {
+                has_p = 1;
+            }
+        }
+    }
+    return has_p ? AV_PICTURE_TYPE_P : AV_PICTURE_TYPE_I;
+}
+
+/**
+ * Parse NAL units of found picture and decode some basic information.
+ *
+ * @param s parser context.
+ * @param avctx codec context.
+ * @param buf buffer with field/frame data.
+ * @param buf_size size of the buffer.
+ */
+static int parse_nal_units(AVCodecParserContext *ctx, const uint8_t *buf,
+                           int buf_size, AVCodecContext *avctx)
+{
+    VVCParserContext *s = ctx->priv_data;
+    CodedBitstreamFragment *pu = &s->picture_unit;
+    CodedBitstreamH266Context *h266 = s->cbc->priv_data;
+    const H266RawSPS *sps;
+    const H266RawPPS *pps;
+    const H266RawPH *ph;
+    int ret, num = 0, den = 0;
+    static const uint8_t h266_sub_width_c[] = {
+        1, 2, 2, 1
+    };
+    static const uint8_t h266_sub_height_c[] = {
+        1, 2, 1, 1
+    };
+
+    /* set some sane default values */
+    ctx->pict_type         = AV_PICTURE_TYPE_I;
+    ctx->key_frame         = 0;
+    ctx->picture_structure = AV_PICTURE_STRUCTURE_FRAME;
+
+    s->cbc->log_ctx = avctx;
+
+    if (avctx->extradata_size && !s->parsed_extradata) {
+        s->parsed_extradata = 1;
+
+        if ((ret = ff_cbs_read(s->cbc, pu, avctx->extradata, avctx->extradata_size)) < 0)
+            av_log(avctx, AV_LOG_WARNING, "Failed to parse extradata.\n");
+
+        ff_cbs_fragment_reset(pu);
+    }
+
+    if ((ret = ff_cbs_read(s->cbc, pu, buf, buf_size))< 0) {
+        av_log(avctx, AV_LOG_ERROR, "Failed to parse picture unit.\n");
+        goto end;
+    }
+
+    sps = h266->active_sps;
+    pps = h266->active_pps;
+    ph = h266->ph;
+    if (!ph) {
+        av_log(avctx, AV_LOG_ERROR, "No picture header.\n");
+        goto end;
+    }
+    av_assert0(sps);
+    av_assert0(pps);
+
+    ctx->key_frame    = ph->ph_gdr_or_irap_pic_flag;
+    ctx->coded_width  = pps->pps_pic_width_in_luma_samples;
+    ctx->coded_height = pps->pps_pic_height_in_luma_samples;
+    ctx->width        = pps->pps_pic_width_in_luma_samples  -
+        (pps->pps_conf_win_left_offset + pps->pps_conf_win_right_offset) *
+        h266_sub_width_c[sps->sps_chroma_format_idc];
+    ctx->height       = pps->pps_pic_height_in_luma_samples -
+        (pps->pps_conf_win_top_offset + pps->pps_conf_win_bottom_offset) *
+        h266_sub_height_c[sps->sps_chroma_format_idc];;
+    ctx->pict_type    = get_pict_type(pu);
+    ctx->format       = get_format(sps);
+
+    avctx->profile  = sps->profile_tier_level.general_profile_idc;
+    avctx->level    = sps->profile_tier_level.general_level_idc;
+
+    if (ctx->width != avctx->width || ctx->height != avctx->height) {
+        ret = ff_set_dimensions(avctx, ctx->width, ctx->height);
+        if (ret < 0)
+            goto end;
+    }
+    avctx->pix_fmt = ctx->format;
+
+    if(sps->sps_ptl_dpb_hrd_params_present_flag && sps->sps_timing_hrd_params_present_flag) {
+        num = sps->sps_general_timing_hrd_parameters.num_units_in_tick;
+        den = sps->sps_general_timing_hrd_parameters.time_scale;
+    } else {
+        goto end;
+    }
+    if (num != 0 && den != 0)
+        av_reduce(&avctx->framerate.den, &avctx->framerate.num,
+                  num, den, 1 << 30);
+end:
+    ff_cbs_fragment_reset(pu);
+    s->cbc->log_ctx = NULL;
+    return ret;
+}
+
+static int vvc_parser_parse(AVCodecParserContext *s, AVCodecContext *avctx,
+                      const uint8_t **poutbuf, int *poutbuf_size,
+                      const uint8_t *buf, int buf_size)
+{
+    int next;
+    VVCParserContext *ctx = s->priv_data;
+    ParseContext *pc = &ctx->pc;
+    int is_dummy_buf = !buf_size;
+    const uint8_t *dummy_buf = buf;
+
+    if (avctx->extradata && !ctx->parsed_extradata) {
+        av_log(avctx, AV_LOG_INFO, "extra data is not supported yet.\n");
+        return AVERROR_PATCHWELCOME;
+    }
+
+    if (s->flags & PARSER_FLAG_COMPLETE_FRAMES) {
+        next = buf_size;
+    } else {
+        next = find_frame_end(s, buf, buf_size);
+        if (ff_combine_frame(pc, next, &buf, &buf_size) < 0) {
+            *poutbuf      = NULL;
+            *poutbuf_size = 0;
+            return buf_size;
+        }
+    }
+
+    is_dummy_buf &= (dummy_buf == buf);
+
+    if (!is_dummy_buf)
+        parse_nal_units(s, buf, buf_size, avctx);
+
+    *poutbuf      = buf;
+    *poutbuf_size = buf_size;
+    return next;
+
+}
+
+static const CodedBitstreamUnitType decompose_unit_types[] = {
+    VVC_TRAIL_NUT,
+    VVC_STSA_NUT,
+    VVC_RADL_NUT,
+    VVC_RASL_NUT,
+    VVC_IDR_W_RADL,
+    VVC_IDR_N_LP,
+    VVC_CRA_NUT,
+    VVC_GDR_NUT,
+    VVC_VPS_NUT,
+    VVC_SPS_NUT,
+    VVC_PPS_NUT,
+    VVC_PH_NUT,
+    VVC_AUD_NUT,
+};
+
+static av_cold int vvc_parser_init(AVCodecParserContext *ctx)
+{
+    VVCParserContext *s = ctx->priv_data;
+    int ret;
+
+    ret = ff_cbs_init(&s->cbc, AV_CODEC_ID_VVC, NULL);
+    if (ret < 0)
+        return ret;
+
+    s->cbc->decompose_unit_types    = decompose_unit_types;
+    s->cbc->nb_decompose_unit_types = FF_ARRAY_ELEMS(decompose_unit_types);
+
+    return 0;
+}
+
+static void vvc_parser_close(AVCodecParserContext *ctx)
+{
+    VVCParserContext *s = ctx->priv_data;
+
+    ff_cbs_fragment_free(&s->picture_unit);
+    ff_cbs_close(&s->cbc);
+    av_freep(&s->pc.buffer);
+}
+
+AVCodecParser ff_vvc_parser = {
+    .codec_ids      = { AV_CODEC_ID_VVC },
+    .priv_data_size = sizeof(VVCParserContext),
+    .parser_init    = vvc_parser_init,
+    .parser_close   = vvc_parser_close,
+    .parser_parse   = vvc_parser_parse,
+};