mirror of
https://github.com/FFmpeg/FFmpeg.git
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27f22f3383
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
214 lines
6.7 KiB
C
214 lines
6.7 KiB
C
/*
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* AV1 parser
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*
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* Copyright (C) 2018 James Almer <jamrial@gmail.com>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/avassert.h"
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#include "cbs.h"
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#include "cbs_av1.h"
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#include "parser.h"
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typedef struct AV1ParseContext {
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CodedBitstreamContext *cbc;
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CodedBitstreamFragment temporal_unit;
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int parsed_extradata;
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} AV1ParseContext;
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static const enum AVPixelFormat pix_fmts_8bit[2][2] = {
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{ AV_PIX_FMT_YUV444P, AV_PIX_FMT_NONE },
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{ AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P },
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};
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static const enum AVPixelFormat pix_fmts_10bit[2][2] = {
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{ AV_PIX_FMT_YUV444P10, AV_PIX_FMT_NONE },
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{ AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV420P10 },
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};
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static const enum AVPixelFormat pix_fmts_12bit[2][2] = {
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{ AV_PIX_FMT_YUV444P12, AV_PIX_FMT_NONE },
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{ AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV420P12 },
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};
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static const enum AVPixelFormat pix_fmts_rgb[3] = {
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AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRP12,
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};
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static int av1_parser_parse(AVCodecParserContext *ctx,
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AVCodecContext *avctx,
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const uint8_t **out_data, int *out_size,
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const uint8_t *data, int size)
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{
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AV1ParseContext *s = ctx->priv_data;
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CodedBitstreamFragment *td = &s->temporal_unit;
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const CodedBitstreamAV1Context *av1 = s->cbc->priv_data;
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const AV1RawSequenceHeader *seq;
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const AV1RawColorConfig *color;
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int ret;
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*out_data = data;
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*out_size = size;
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ctx->key_frame = -1;
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ctx->pict_type = AV_PICTURE_TYPE_NONE;
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ctx->picture_structure = AV_PICTURE_STRUCTURE_UNKNOWN;
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s->cbc->log_ctx = avctx;
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if (avctx->extradata_size && !s->parsed_extradata) {
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s->parsed_extradata = 1;
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ret = ff_cbs_read_extradata_from_codec(s->cbc, td, avctx);
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if (ret < 0) {
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av_log(avctx, AV_LOG_WARNING, "Failed to parse extradata.\n");
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}
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ff_cbs_fragment_reset(td);
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}
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ret = ff_cbs_read(s->cbc, td, data, size);
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if (ret < 0) {
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av_log(avctx, AV_LOG_ERROR, "Failed to parse temporal unit.\n");
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goto end;
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}
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if (!av1->sequence_header) {
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av_log(avctx, AV_LOG_ERROR, "No sequence header available\n");
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goto end;
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}
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seq = av1->sequence_header;
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color = &seq->color_config;
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for (int i = 0; i < td->nb_units; i++) {
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const CodedBitstreamUnit *unit = &td->units[i];
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const AV1RawOBU *obu = unit->content;
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const AV1RawFrameHeader *frame;
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if (unit->type == AV1_OBU_FRAME)
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frame = &obu->obu.frame.header;
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else if (unit->type == AV1_OBU_FRAME_HEADER)
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frame = &obu->obu.frame_header;
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else
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continue;
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if (obu->header.spatial_id > 0)
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continue;
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if (!frame->show_frame && !frame->show_existing_frame)
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continue;
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ctx->width = frame->frame_width_minus_1 + 1;
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ctx->height = frame->frame_height_minus_1 + 1;
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ctx->key_frame = frame->frame_type == AV1_FRAME_KEY && !frame->show_existing_frame;
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switch (frame->frame_type) {
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case AV1_FRAME_KEY:
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case AV1_FRAME_INTRA_ONLY:
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ctx->pict_type = AV_PICTURE_TYPE_I;
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break;
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case AV1_FRAME_INTER:
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ctx->pict_type = AV_PICTURE_TYPE_P;
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break;
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case AV1_FRAME_SWITCH:
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ctx->pict_type = AV_PICTURE_TYPE_SP;
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break;
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}
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ctx->picture_structure = AV_PICTURE_STRUCTURE_FRAME;
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}
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switch (av1->bit_depth) {
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case 8:
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ctx->format = color->mono_chrome ? AV_PIX_FMT_GRAY8
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: pix_fmts_8bit [color->subsampling_x][color->subsampling_y];
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break;
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case 10:
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ctx->format = color->mono_chrome ? AV_PIX_FMT_GRAY10
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: pix_fmts_10bit[color->subsampling_x][color->subsampling_y];
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break;
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case 12:
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ctx->format = color->mono_chrome ? AV_PIX_FMT_GRAY12
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: pix_fmts_12bit[color->subsampling_x][color->subsampling_y];
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break;
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}
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av_assert2(ctx->format != AV_PIX_FMT_NONE);
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if (!color->subsampling_x && !color->subsampling_y &&
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color->matrix_coefficients == AVCOL_SPC_RGB &&
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color->color_primaries == AVCOL_PRI_BT709 &&
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color->transfer_characteristics == AVCOL_TRC_IEC61966_2_1)
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ctx->format = pix_fmts_rgb[color->high_bitdepth + color->twelve_bit];
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avctx->profile = seq->seq_profile;
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avctx->level = seq->seq_level_idx[0];
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avctx->colorspace = (enum AVColorSpace) color->matrix_coefficients;
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avctx->color_primaries = (enum AVColorPrimaries) color->color_primaries;
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avctx->color_trc = (enum AVColorTransferCharacteristic) color->transfer_characteristics;
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avctx->color_range = color->color_range ? AVCOL_RANGE_JPEG : AVCOL_RANGE_MPEG;
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if (avctx->framerate.num)
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avctx->time_base = av_inv_q(av_mul_q(avctx->framerate, (AVRational){avctx->ticks_per_frame, 1}));
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end:
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ff_cbs_fragment_reset(td);
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s->cbc->log_ctx = NULL;
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return size;
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}
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static const CodedBitstreamUnitType decompose_unit_types[] = {
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AV1_OBU_TEMPORAL_DELIMITER,
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AV1_OBU_SEQUENCE_HEADER,
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AV1_OBU_FRAME_HEADER,
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AV1_OBU_TILE_GROUP,
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AV1_OBU_FRAME,
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};
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static av_cold int av1_parser_init(AVCodecParserContext *ctx)
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{
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AV1ParseContext *s = ctx->priv_data;
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int ret;
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ret = ff_cbs_init(&s->cbc, AV_CODEC_ID_AV1, NULL);
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if (ret < 0)
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return ret;
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s->cbc->decompose_unit_types = decompose_unit_types;
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s->cbc->nb_decompose_unit_types = FF_ARRAY_ELEMS(decompose_unit_types);
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return 0;
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}
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static void av1_parser_close(AVCodecParserContext *ctx)
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{
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AV1ParseContext *s = ctx->priv_data;
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ff_cbs_fragment_free(&s->temporal_unit);
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ff_cbs_close(&s->cbc);
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}
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const AVCodecParser ff_av1_parser = {
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.codec_ids = { AV_CODEC_ID_AV1 },
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.priv_data_size = sizeof(AV1ParseContext),
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.parser_init = av1_parser_init,
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.parser_close = av1_parser_close,
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.parser_parse = av1_parser_parse,
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};
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