[FFmpeg-devel] [PATCH v6 6/9] avcodec: add vvc parser
Nuo Mi
nuomi2021 at gmail.com
Wed Feb 17 03:51:43 EET 2021
---
configure | 1 +
libavcodec/Makefile | 1 +
libavcodec/parsers.c | 1 +
libavcodec/vvc_parser.c | 310 ++++++++++++++++++++++++++++++++++++++++
4 files changed, 313 insertions(+)
create mode 100644 libavcodec/vvc_parser.c
diff --git a/configure b/configure
index 11df59a229..24463595d2 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 23553e68e9..5adb96c8df 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -1128,6 +1128,7 @@ 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-$(CONFIG_XBM_PARSER) += xbm_parser.o
OBJS-$(CONFIG_XMA_PARSER) += xma_parser.o
diff --git a/libavcodec/parsers.c b/libavcodec/parsers.c
index f8cfa1cde9..61d753d680 100644
--- a/libavcodec/parsers.c
+++ b/libavcodec/parsers.c
@@ -72,6 +72,7 @@ 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_xbm_parser;
extern AVCodecParser ff_xma_parser;
diff --git a/libavcodec/vvc_parser.c b/libavcodec/vvc_parser.c
new file mode 100644
index 0000000000..4b4aa4b625
--- /dev/null
+++ b/libavcodec/vvc_parser.c
@@ -0,0 +1,310 @@
+/*
+ * VVC parser
+ *
+ * Copyright (C) 2029 Nuo Mi <nuomi2021 at 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;
+ // 7.4.2.4.3 and 7.4.2.4.4
+ if ((nut >= VVC_OPI_NUT && nut <= VVC_PREFIX_APS_NUT && nut != VVC_PH_NUT) ||
+ nut == VVC_AUD_NUT || nut == VVC_PREFIX_SEI_NUT || nut == VVC_RSV_NVCL_26 ||
+ nut == VVC_UNSPEC_28 || nut == VVC_UNSPEC_29) {
+ 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;
+ }
+
+ ph = h266->ph;
+ if (!ph) {
+ av_log(avctx, AV_LOG_ERROR, "No picture header.\n");
+ ret = AVERROR_INVALIDDATA;
+ goto end;
+ }
+ pps = h266->pps[ph->ph_pic_parameter_set_id];
+ if (!pps) {
+ av_log(avctx, AV_LOG_ERROR, "PPS id %d not available.\n",
+ ph->ph_pic_parameter_set_id);
+ ret = AVERROR_INVALIDDATA;
+ goto end;
+ }
+ sps = h266->sps[pps->pps_seq_parameter_set_id];
+ if (!sps) {
+ av_log(avctx, AV_LOG_ERROR, "PPS id %d not available.\n",
+ pps->pps_seq_parameter_set_id);
+ ret = AVERROR_INVALIDDATA;
+ goto end;
+ }
+
+ 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,
+};
--
2.25.1
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