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"
29 typedef struct AV1ParseContext {
30 CodedBitstreamContext *cbc;
31 CodedBitstreamFragment temporal_unit;
35 static const enum AVPixelFormat pix_fmts_8bit[2][2] = {
36 { AV_PIX_FMT_YUV444P, AV_PIX_FMT_NONE },
37 { AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P },
39 static const enum AVPixelFormat pix_fmts_10bit[2][2] = {
40 { AV_PIX_FMT_YUV444P10, AV_PIX_FMT_NONE },
41 { AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV420P10 },
43 static const enum AVPixelFormat pix_fmts_12bit[2][2] = {
44 { AV_PIX_FMT_YUV444P12, AV_PIX_FMT_NONE },
45 { AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV420P12 },
48 static const enum AVPixelFormat pix_fmts_rgb[3] = {
49 AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRP12,
52 static int av1_parser_parse(AVCodecParserContext *ctx,
53 AVCodecContext *avctx,
54 const uint8_t **out_data, int *out_size,
55 const uint8_t *data, int size)
57 AV1ParseContext *s = ctx->priv_data;
58 CodedBitstreamFragment *td = &s->temporal_unit;
59 CodedBitstreamAV1Context *av1 = s->cbc->priv_data;
60 AV1RawSequenceHeader *seq;
61 AV1RawColorConfig *color;
68 ctx->pict_type = AV_PICTURE_TYPE_NONE;
69 ctx->picture_structure = AV_PICTURE_STRUCTURE_UNKNOWN;
71 s->cbc->log_ctx = avctx;
73 if (avctx->extradata_size && !s->parsed_extradata) {
74 s->parsed_extradata = 1;
76 ret = ff_cbs_read(s->cbc, td, avctx->extradata, avctx->extradata_size);
78 av_log(avctx, AV_LOG_WARNING, "Failed to parse extradata.\n");
81 ff_cbs_fragment_reset(td);
84 ret = ff_cbs_read(s->cbc, td, data, size);
86 av_log(avctx, AV_LOG_ERROR, "Failed to parse temporal unit.\n");
90 if (!av1->sequence_header) {
91 av_log(avctx, AV_LOG_ERROR, "No sequence header available\n");
95 seq = av1->sequence_header;
96 color = &seq->color_config;
98 for (int i = 0; i < td->nb_units; i++) {
99 CodedBitstreamUnit *unit = &td->units[i];
100 AV1RawOBU *obu = unit->content;
101 AV1RawFrameHeader *frame;
103 if (unit->type == AV1_OBU_FRAME)
104 frame = &obu->obu.frame.header;
105 else if (unit->type == AV1_OBU_FRAME_HEADER)
106 frame = &obu->obu.frame_header;
110 if (obu->header.spatial_id > 0)
113 if (!frame->show_frame && !frame->show_existing_frame)
116 ctx->width = frame->frame_width_minus_1 + 1;
117 ctx->height = frame->frame_height_minus_1 + 1;
119 ctx->key_frame = frame->frame_type == AV1_FRAME_KEY && !frame->show_existing_frame;
121 switch (frame->frame_type) {
123 case AV1_FRAME_INTRA_ONLY:
124 ctx->pict_type = AV_PICTURE_TYPE_I;
126 case AV1_FRAME_INTER:
127 ctx->pict_type = AV_PICTURE_TYPE_P;
129 case AV1_FRAME_SWITCH:
130 ctx->pict_type = AV_PICTURE_TYPE_SP;
133 ctx->picture_structure = AV_PICTURE_STRUCTURE_FRAME;
136 switch (av1->bit_depth) {
138 ctx->format = color->mono_chrome ? AV_PIX_FMT_GRAY8
139 : pix_fmts_8bit [color->subsampling_x][color->subsampling_y];
142 ctx->format = color->mono_chrome ? AV_PIX_FMT_GRAY10
143 : pix_fmts_10bit[color->subsampling_x][color->subsampling_y];
146 ctx->format = color->mono_chrome ? AV_PIX_FMT_GRAY12
147 : pix_fmts_12bit[color->subsampling_x][color->subsampling_y];
150 av_assert2(ctx->format != AV_PIX_FMT_NONE);
152 if (!color->subsampling_x && !color->subsampling_y &&
153 color->matrix_coefficients == AVCOL_SPC_RGB &&
154 color->color_primaries == AVCOL_PRI_BT709 &&
155 color->transfer_characteristics == AVCOL_TRC_IEC61966_2_1)
156 ctx->format = pix_fmts_rgb[color->high_bitdepth + color->twelve_bit];
158 avctx->profile = seq->seq_profile;
159 avctx->level = seq->seq_level_idx[0];
161 avctx->colorspace = (enum AVColorSpace) color->matrix_coefficients;
162 avctx->color_primaries = (enum AVColorPrimaries) color->color_primaries;
163 avctx->color_trc = (enum AVColorTransferCharacteristic) color->transfer_characteristics;
164 avctx->color_range = color->color_range ? AVCOL_RANGE_JPEG : AVCOL_RANGE_MPEG;
166 if (avctx->framerate.num)
167 avctx->time_base = av_inv_q(av_mul_q(avctx->framerate, (AVRational){avctx->ticks_per_frame, 1}));
170 ff_cbs_fragment_reset(td);
172 s->cbc->log_ctx = NULL;
177 static const CodedBitstreamUnitType decompose_unit_types[] = {
178 AV1_OBU_TEMPORAL_DELIMITER,
179 AV1_OBU_SEQUENCE_HEADER,
180 AV1_OBU_FRAME_HEADER,
185 static av_cold int av1_parser_init(AVCodecParserContext *ctx)
187 AV1ParseContext *s = ctx->priv_data;
190 ret = ff_cbs_init(&s->cbc, AV_CODEC_ID_AV1, NULL);
194 s->cbc->decompose_unit_types = (CodedBitstreamUnitType *)decompose_unit_types;
195 s->cbc->nb_decompose_unit_types = FF_ARRAY_ELEMS(decompose_unit_types);
200 static void av1_parser_close(AVCodecParserContext *ctx)
202 AV1ParseContext *s = ctx->priv_data;
204 ff_cbs_fragment_free(&s->temporal_unit);
205 ff_cbs_close(&s->cbc);
208 static int av1_parser_split(AVCodecContext *avctx,
209 const uint8_t *buf, int buf_size)
212 const uint8_t *ptr = buf, *end = buf + buf_size;
215 int len = ff_av1_extract_obu(&obu, ptr, buf_size, avctx);
219 if (obu.type == AV1_OBU_FRAME_HEADER ||
220 obu.type == AV1_OBU_FRAME) {
230 AVCodecParser ff_av1_parser = {
231 .codec_ids = { AV_CODEC_ID_AV1 },
232 .priv_data_size = sizeof(AV1ParseContext),
233 .parser_init = av1_parser_init,
234 .parser_close = av1_parser_close,
235 .parser_parse = av1_parser_parse,
236 .split = av1_parser_split,