FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/av1_parser.c
Date: 2026-09-19 14:27:34
Exec Total Coverage
Lines: 85 99 85.9%
Functions: 3 3 100.0%
Branches: 34 56 60.7%
Line Branch Exec Source
1 /*
2 * AV1 parser
3 *
4 * Copyright (C) 2018 James Almer <jamrial@gmail.com>
5 *
6 * This file is part of FFmpeg.
7 *
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.
12 *
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.
17 *
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
21 */
22
23 #include "libavutil/attributes.h"
24 #include "libavutil/avassert.h"
25
26 #include "av1_parse.h"
27 #include "avcodec.h"
28 #include "cbs.h"
29 #include "cbs_av1.h"
30 #include "parser_internal.h"
31
32 typedef struct AV1ParseContext {
33 CodedBitstreamContext *cbc;
34 CodedBitstreamFragment temporal_unit;
35 int parsed_extradata;
36 } AV1ParseContext;
37
38 static const enum AVPixelFormat pix_fmts_8bit[2][2] = {
39 { AV_PIX_FMT_YUV444P, AV_PIX_FMT_NONE },
40 { AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P },
41 };
42 static const enum AVPixelFormat pix_fmts_10bit[2][2] = {
43 { AV_PIX_FMT_YUV444P10, AV_PIX_FMT_NONE },
44 { AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV420P10 },
45 };
46 static const enum AVPixelFormat pix_fmts_12bit[2][2] = {
47 { AV_PIX_FMT_YUV444P12, AV_PIX_FMT_NONE },
48 { AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV420P12 },
49 };
50
51 static const enum AVPixelFormat pix_fmts_rgb[3] = {
52 AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRP12,
53 };
54
55 810 static int av1_parser_parse(AVCodecParserContext *ctx,
56 AVCodecContext *avctx,
57 const uint8_t **out_data, int *out_size,
58 const uint8_t *data, int size)
59 {
60 810 AV1ParseContext *s = ctx->priv_data;
61 810 CodedBitstreamFragment *td = &s->temporal_unit;
62 810 const CodedBitstreamAV1Context *av1 = s->cbc->priv_data;
63 const AV1RawSequenceHeader *seq;
64 const AV1RawColorConfig *color;
65 int ret;
66
67 810 *out_data = data;
68 810 *out_size = size;
69
70 810 ctx->key_frame = -1;
71 810 ctx->pict_type = AV_PICTURE_TYPE_NONE;
72 810 ctx->picture_structure = AV_PICTURE_STRUCTURE_UNKNOWN;
73
74 810 s->cbc->log_ctx = avctx;
75
76
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 810 if (avctx->extradata_size && !s->parsed_extradata) {
77 34 s->parsed_extradata = 1;
78
79 34 ret = ff_cbs_read_extradata_from_codec(s->cbc, td, avctx);
80
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 34 if (ret < 0) {
81 ✗ av_log(avctx, AV_LOG_WARNING, "Failed to parse extradata.\n");
82 }
83
84 34 ff_cbs_fragment_reset(td);
85 }
86
87 810 ret = ff_cbs_read(s->cbc, td, NULL, data, size);
88
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 810 if (ret < 0) {
89 ✗ av_log(avctx, AV_LOG_ERROR, "Failed to parse temporal unit.\n");
90 ✗ goto end;
91 }
92
93
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 810 if (!av1->sequence_header) {
94 ✗ av_log(avctx, AV_LOG_ERROR, "No sequence header available\n");
95 ✗ goto end;
96 }
97
98 810 seq = av1->sequence_header;
99 810 color = &seq->color_config;
100
101
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 2839 for (int i = 0; i < td->nb_units; i++) {
102 2029 const CodedBitstreamUnit *unit = &td->units[i];
103 2029 const AV1RawOBU *obu = unit->content;
104 const AV1RawFrameHeader *frame;
105
106
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 2029 if (unit->type == AV1_OBU_FRAME)
107 805 frame = &obu->obu.frame.header;
108
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 1224 else if (unit->type == AV1_OBU_FRAME_HEADER)
109 198 frame = &obu->obu.frame_header;
110 else
111 1026 continue;
112
113
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 1003 if (obu->header.spatial_id > 0)
114 16 continue;
115
116
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 987 if (!frame->show_frame && !frame->show_existing_frame)
117 210 continue;
118
119 777 ctx->width = frame->frame_width_minus_1 + 1;
120 777 ctx->height = frame->frame_height_minus_1 + 1;
121
122
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 777 ctx->key_frame = frame->frame_type == AV1_FRAME_KEY && !frame->show_existing_frame;
123
124
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 777 switch (frame->frame_type) {
125 78 case AV1_FRAME_KEY:
126 case AV1_FRAME_INTRA_ONLY:
127 78 ctx->pict_type = AV_PICTURE_TYPE_I;
128 78 break;
129 698 case AV1_FRAME_INTER:
130 698 ctx->pict_type = AV_PICTURE_TYPE_P;
131 698 break;
132 1 case AV1_FRAME_SWITCH:
133 1 ctx->pict_type = AV_PICTURE_TYPE_SP;
134 1 break;
135 }
136 777 ctx->picture_structure = AV_PICTURE_STRUCTURE_FRAME;
137
138 /* Extract SAR from render_height_minus_1 & render_width_minus_1 */
139 777 av_reduce(&avctx->sample_aspect_ratio.num,
140 &avctx->sample_aspect_ratio.den,
141 777 (int64_t)ctx->height * (frame->render_width_minus_1 + 1),
142 777 (int64_t)ctx->width * (frame->render_height_minus_1 + 1),
143 INT_MAX);
144 }
145
146
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 810 switch (av1->bit_depth) {
147 799 case 8:
148 1598 ctx->format = color->mono_chrome ? AV_PIX_FMT_GRAY8
149
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 799 : pix_fmts_8bit [color->subsampling_x][color->subsampling_y];
150 799 break;
151 11 case 10:
152 22 ctx->format = color->mono_chrome ? AV_PIX_FMT_GRAY10
153
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 11 : pix_fmts_10bit[color->subsampling_x][color->subsampling_y];
154 11 break;
155 ✗ case 12:
156 ✗ ctx->format = color->mono_chrome ? AV_PIX_FMT_GRAY12
157 ✗ : pix_fmts_12bit[color->subsampling_x][color->subsampling_y];
158 ✗ break;
159 }
160 av_assert2(ctx->format != AV_PIX_FMT_NONE);
161
162
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 810 if (!color->subsampling_x && !color->subsampling_y &&
163 ✗ color->matrix_coefficients == AVCOL_SPC_RGB &&
164 ✗ color->color_primaries == AVCOL_PRI_BT709 &&
165 ✗ color->transfer_characteristics == AVCOL_TRC_IEC61966_2_1)
166 ✗ ctx->format = pix_fmts_rgb[color->high_bitdepth + color->twelve_bit];
167
168 810 avctx->profile = seq->seq_profile;
169 810 avctx->level = seq->seq_level_idx[0];
170
171 810 avctx->colorspace = (enum AVColorSpace) color->matrix_coefficients;
172 810 avctx->color_primaries = (enum AVColorPrimaries) color->color_primaries;
173 810 avctx->color_trc = (enum AVColorTransferCharacteristic) color->transfer_characteristics;
174
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 810 avctx->color_range = color->color_range ? AVCOL_RANGE_JPEG : AVCOL_RANGE_MPEG;
175
176
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 810 if (seq->timing_info_present_flag)
177 270 avctx->framerate = ff_av1_framerate(1LL + seq->timing_info.num_ticks_per_picture_minus_1,
178 270 seq->timing_info.num_units_in_display_tick,
179 270 seq->timing_info.time_scale);
180
181 540 end:
182 810 ff_cbs_fragment_reset(td);
183
184 810 s->cbc->log_ctx = NULL;
185
186 810 return size;
187 }
188
189 static const CodedBitstreamUnitType decompose_unit_types[] = {
190 AV1_OBU_TEMPORAL_DELIMITER,
191 AV1_OBU_SEQUENCE_HEADER,
192 AV1_OBU_FRAME_HEADER,
193 AV1_OBU_TILE_GROUP,
194 AV1_OBU_FRAME,
195 AV1_OBU_REDUNDANT_FRAME_HEADER,
196 };
197
198 37 static av_cold int av1_parser_init(AVCodecParserContext *ctx)
199 {
200 37 AV1ParseContext *s = ctx->priv_data;
201 int ret;
202
203 37 ret = ff_cbs_init(&s->cbc, AV_CODEC_ID_AV1, NULL);
204
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 37 if (ret < 0)
205 ✗ return ret;
206
207 37 s->cbc->decompose_unit_types = decompose_unit_types;
208 37 s->cbc->nb_decompose_unit_types = FF_ARRAY_ELEMS(decompose_unit_types);
209
210 37 return 0;
211 }
212
213 37 static av_cold void av1_parser_close(AVCodecParserContext *ctx)
214 {
215 37 AV1ParseContext *s = ctx->priv_data;
216
217 37 ff_cbs_fragment_free(&s->temporal_unit);
218 37 ff_cbs_close(&s->cbc);
219 37 }
220
221 const FFCodecParser ff_av1_parser = {
222 PARSER_CODEC_LIST(AV_CODEC_ID_AV1),
223 .priv_data_size = sizeof(AV1ParseContext),
224 .init = av1_parser_init,
225 .close = av1_parser_close,
226 .parse = av1_parser_parse,
227 };
228