4 * Copyright (C) 2018 James Almer <jamrial@gmail.com>
6 * This file is part of FFmpeg.
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 #include "av1_parse.h"
28 typedef struct AV1ParseContext {
29 CodedBitstreamContext *cbc;
30 CodedBitstreamFragment temporal_unit;
34 static const enum AVPixelFormat pix_fmts_8bit[2][2] = {
35 { AV_PIX_FMT_YUV444P, AV_PIX_FMT_NONE },
36 { AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P },
38 static const enum AVPixelFormat pix_fmts_10bit[2][2] = {
39 { AV_PIX_FMT_YUV444P10, AV_PIX_FMT_NONE },
40 { AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV420P10 },
42 static const enum AVPixelFormat pix_fmts_12bit[2][2] = {
43 { AV_PIX_FMT_YUV444P12, AV_PIX_FMT_NONE },
44 { AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV420P12 },
47 static int av1_parser_parse(AVCodecParserContext *ctx,
48 AVCodecContext *avctx,
49 const uint8_t **out_data, int *out_size,
50 const uint8_t *data, int size)
52 AV1ParseContext *s = ctx->priv_data;
53 CodedBitstreamFragment *td = &s->temporal_unit;
54 CodedBitstreamAV1Context *av1 = s->cbc->priv_data;
61 ctx->pict_type = AV_PICTURE_TYPE_NONE;
62 ctx->picture_structure = AV_PICTURE_STRUCTURE_UNKNOWN;
64 s->cbc->log_ctx = avctx;
66 if (avctx->extradata_size && !s->parsed_extradata) {
67 s->parsed_extradata = 1;
69 ret = ff_cbs_read(s->cbc, td, avctx->extradata, avctx->extradata_size);
71 av_log(avctx, AV_LOG_WARNING, "Failed to parse extradata.\n");
74 ff_cbs_fragment_reset(s->cbc, td);
77 ret = ff_cbs_read(s->cbc, td, data, size);
79 av_log(avctx, AV_LOG_ERROR, "Failed to parse temporal unit.\n");
83 if (!av1->sequence_header) {
84 av_log(avctx, AV_LOG_ERROR, "No sequence header available\n");
88 for (int i = 0; i < td->nb_units; i++) {
89 CodedBitstreamUnit *unit = &td->units[i];
90 AV1RawOBU *obu = unit->content;
91 AV1RawSequenceHeader *seq = av1->sequence_header;
92 AV1RawColorConfig *color = &seq->color_config;
93 AV1RawFrameHeader *frame;
96 if (unit->type == AV1_OBU_FRAME)
97 frame = &obu->obu.frame.header;
98 else if (unit->type == AV1_OBU_FRAME_HEADER)
99 frame = &obu->obu.frame_header;
103 if (frame->show_existing_frame) {
104 AV1ReferenceFrameState *ref = &av1->ref[frame->frame_to_show_map_idx];
107 av_log(avctx, AV_LOG_ERROR, "Invalid reference frame\n");
111 ctx->width = ref->frame_width;
112 ctx->height = ref->frame_height;
113 frame_type = ref->frame_type;
116 } else if (!frame->show_frame) {
119 ctx->width = av1->frame_width;
120 ctx->height = av1->frame_height;
121 frame_type = frame->frame_type;
123 ctx->key_frame = frame_type == AV1_FRAME_KEY;
126 avctx->profile = seq->seq_profile;
127 avctx->level = seq->seq_level_idx[0];
129 switch (frame_type) {
131 case AV1_FRAME_INTRA_ONLY:
132 ctx->pict_type = AV_PICTURE_TYPE_I;
134 case AV1_FRAME_INTER:
135 ctx->pict_type = AV_PICTURE_TYPE_P;
137 case AV1_FRAME_SWITCH:
138 ctx->pict_type = AV_PICTURE_TYPE_SP;
141 ctx->picture_structure = AV_PICTURE_STRUCTURE_FRAME;
143 switch (av1->bit_depth) {
145 ctx->format = color->mono_chrome ? AV_PIX_FMT_GRAY8
146 : pix_fmts_8bit [color->subsampling_x][color->subsampling_y];
149 ctx->format = color->mono_chrome ? AV_PIX_FMT_GRAY10
150 : pix_fmts_10bit[color->subsampling_x][color->subsampling_y];
153 ctx->format = color->mono_chrome ? AV_PIX_FMT_GRAY12
154 : pix_fmts_12bit[color->subsampling_x][color->subsampling_y];
157 av_assert2(ctx->format != AV_PIX_FMT_NONE);
160 if (avctx->framerate.num)
161 avctx->time_base = av_inv_q(av_mul_q(avctx->framerate, (AVRational){avctx->ticks_per_frame, 1}));
164 ff_cbs_fragment_reset(s->cbc, td);
166 s->cbc->log_ctx = NULL;
171 static const CodedBitstreamUnitType decompose_unit_types[] = {
172 AV1_OBU_TEMPORAL_DELIMITER,
173 AV1_OBU_SEQUENCE_HEADER,
174 AV1_OBU_FRAME_HEADER,
179 static av_cold int av1_parser_init(AVCodecParserContext *ctx)
181 AV1ParseContext *s = ctx->priv_data;
184 ret = ff_cbs_init(&s->cbc, AV_CODEC_ID_AV1, NULL);
188 s->cbc->decompose_unit_types = (CodedBitstreamUnitType *)decompose_unit_types;
189 s->cbc->nb_decompose_unit_types = FF_ARRAY_ELEMS(decompose_unit_types);
194 static void av1_parser_close(AVCodecParserContext *ctx)
196 AV1ParseContext *s = ctx->priv_data;
198 ff_cbs_fragment_free(s->cbc, &s->temporal_unit);
199 ff_cbs_close(&s->cbc);
202 static int av1_parser_split(AVCodecContext *avctx,
203 const uint8_t *buf, int buf_size)
206 const uint8_t *ptr = buf, *end = buf + buf_size;
209 int len = ff_av1_extract_obu(&obu, ptr, buf_size, avctx);
213 if (obu.type == AV1_OBU_FRAME_HEADER ||
214 obu.type == AV1_OBU_FRAME) {
224 AVCodecParser ff_av1_parser = {
225 .codec_ids = { AV_CODEC_ID_AV1 },
226 .priv_data_size = sizeof(AV1ParseContext),
227 .parser_init = av1_parser_init,
228 .parser_close = av1_parser_close,
229 .parser_parse = av1_parser_parse,
230 .split = av1_parser_split,