FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/av1_parser.c
Date: 2025-09-27 00:24:36
Exec Total Coverage
Lines: 82 96 85.4%
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 "cbs.h"
28 #include "cbs_av1.h"
29 #include "parser.h"
30
31 typedef struct AV1ParseContext {
32 CodedBitstreamContext *cbc;
33 CodedBitstreamFragment temporal_unit;
34 int parsed_extradata;
35 } AV1ParseContext;
36
37 static const enum AVPixelFormat pix_fmts_8bit[2][2] = {
38 { AV_PIX_FMT_YUV444P, AV_PIX_FMT_NONE },
39 { AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P },
40 };
41 static const enum AVPixelFormat pix_fmts_10bit[2][2] = {
42 { AV_PIX_FMT_YUV444P10, AV_PIX_FMT_NONE },
43 { AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV420P10 },
44 };
45 static const enum AVPixelFormat pix_fmts_12bit[2][2] = {
46 { AV_PIX_FMT_YUV444P12, AV_PIX_FMT_NONE },
47 { AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV420P12 },
48 };
49
50 static const enum AVPixelFormat pix_fmts_rgb[3] = {
51 AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRP12,
52 };
53
54 665 static int av1_parser_parse(AVCodecParserContext *ctx,
55 AVCodecContext *avctx,
56 const uint8_t **out_data, int *out_size,
57 const uint8_t *data, int size)
58 {
59 665 AV1ParseContext *s = ctx->priv_data;
60 665 CodedBitstreamFragment *td = &s->temporal_unit;
61 665 const CodedBitstreamAV1Context *av1 = s->cbc->priv_data;
62 const AV1RawSequenceHeader *seq;
63 const AV1RawColorConfig *color;
64 int ret;
65
66 665 *out_data = data;
67 665 *out_size = size;
68
69 665 ctx->key_frame = -1;
70 665 ctx->pict_type = AV_PICTURE_TYPE_NONE;
71 665 ctx->picture_structure = AV_PICTURE_STRUCTURE_UNKNOWN;
72
73 665 s->cbc->log_ctx = avctx;
74
75
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 665 if (avctx->extradata_size && !s->parsed_extradata) {
76 27 s->parsed_extradata = 1;
77
78 27 ret = ff_cbs_read_extradata_from_codec(s->cbc, td, avctx);
79
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 27 if (ret < 0) {
80 ✗ av_log(avctx, AV_LOG_WARNING, "Failed to parse extradata.\n");
81 }
82
83 27 ff_cbs_fragment_reset(td);
84 }
85
86 665 ret = ff_cbs_read(s->cbc, td, NULL, data, size);
87
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 665 if (ret < 0) {
88 ✗ av_log(avctx, AV_LOG_ERROR, "Failed to parse temporal unit.\n");
89 ✗ goto end;
90 }
91
92
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 665 if (!av1->sequence_header) {
93 ✗ av_log(avctx, AV_LOG_ERROR, "No sequence header available\n");
94 ✗ goto end;
95 }
96
97 665 seq = av1->sequence_header;
98 665 color = &seq->color_config;
99
100
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 2468 for (int i = 0; i < td->nb_units; i++) {
101 1803 const CodedBitstreamUnit *unit = &td->units[i];
102 1803 const AV1RawOBU *obu = unit->content;
103 const AV1RawFrameHeader *frame;
104
105
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 1803 if (unit->type == AV1_OBU_FRAME)
106 652 frame = &obu->obu.frame.header;
107
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 1151 else if (unit->type == AV1_OBU_FRAME_HEADER)
108 156 frame = &obu->obu.frame_header;
109 else
110 995 continue;
111
112
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 808 if (obu->header.spatial_id > 0)
113 16 continue;
114
115
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 792 if (!frame->show_frame && !frame->show_existing_frame)
116 155 continue;
117
118 637 ctx->width = frame->frame_width_minus_1 + 1;
119 637 ctx->height = frame->frame_height_minus_1 + 1;
120
121
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 637 ctx->key_frame = frame->frame_type == AV1_FRAME_KEY && !frame->show_existing_frame;
122
123
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 637 switch (frame->frame_type) {
124 71 case AV1_FRAME_KEY:
125 case AV1_FRAME_INTRA_ONLY:
126 71 ctx->pict_type = AV_PICTURE_TYPE_I;
127 71 break;
128 565 case AV1_FRAME_INTER:
129 565 ctx->pict_type = AV_PICTURE_TYPE_P;
130 565 break;
131 1 case AV1_FRAME_SWITCH:
132 1 ctx->pict_type = AV_PICTURE_TYPE_SP;
133 1 break;
134 }
135 637 ctx->picture_structure = AV_PICTURE_STRUCTURE_FRAME;
136 }
137
138
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 665 switch (av1->bit_depth) {
139 654 case 8:
140 1308 ctx->format = color->mono_chrome ? AV_PIX_FMT_GRAY8
141
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 654 : pix_fmts_8bit [color->subsampling_x][color->subsampling_y];
142 654 break;
143 11 case 10:
144 22 ctx->format = color->mono_chrome ? AV_PIX_FMT_GRAY10
145
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 11 : pix_fmts_10bit[color->subsampling_x][color->subsampling_y];
146 11 break;
147 ✗ case 12:
148 ✗ ctx->format = color->mono_chrome ? AV_PIX_FMT_GRAY12
149 ✗ : pix_fmts_12bit[color->subsampling_x][color->subsampling_y];
150 ✗ break;
151 }
152 av_assert2(ctx->format != AV_PIX_FMT_NONE);
153
154
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 665 if (!color->subsampling_x && !color->subsampling_y &&
155 ✗ color->matrix_coefficients == AVCOL_SPC_RGB &&
156 ✗ color->color_primaries == AVCOL_PRI_BT709 &&
157 ✗ color->transfer_characteristics == AVCOL_TRC_IEC61966_2_1)
158 ✗ ctx->format = pix_fmts_rgb[color->high_bitdepth + color->twelve_bit];
159
160 665 avctx->profile = seq->seq_profile;
161 665 avctx->level = seq->seq_level_idx[0];
162
163 665 avctx->colorspace = (enum AVColorSpace) color->matrix_coefficients;
164 665 avctx->color_primaries = (enum AVColorPrimaries) color->color_primaries;
165 665 avctx->color_trc = (enum AVColorTransferCharacteristic) color->transfer_characteristics;
166
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 665 avctx->color_range = color->color_range ? AVCOL_RANGE_JPEG : AVCOL_RANGE_MPEG;
167
168
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 665 if (seq->timing_info_present_flag)
169 270 avctx->framerate = ff_av1_framerate(1LL + seq->timing_info.num_ticks_per_picture_minus_1,
170 270 seq->timing_info.num_units_in_display_tick,
171 270 seq->timing_info.time_scale);
172
173 395 end:
174 665 ff_cbs_fragment_reset(td);
175
176 665 s->cbc->log_ctx = NULL;
177
178 665 return size;
179 }
180
181 static const CodedBitstreamUnitType decompose_unit_types[] = {
182 AV1_OBU_TEMPORAL_DELIMITER,
183 AV1_OBU_SEQUENCE_HEADER,
184 AV1_OBU_FRAME_HEADER,
185 AV1_OBU_TILE_GROUP,
186 AV1_OBU_FRAME,
187 };
188
189 30 static av_cold int av1_parser_init(AVCodecParserContext *ctx)
190 {
191 30 AV1ParseContext *s = ctx->priv_data;
192 int ret;
193
194 30 ret = ff_cbs_init(&s->cbc, AV_CODEC_ID_AV1, NULL);
195
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 30 if (ret < 0)
196 ✗ return ret;
197
198 30 s->cbc->decompose_unit_types = decompose_unit_types;
199 30 s->cbc->nb_decompose_unit_types = FF_ARRAY_ELEMS(decompose_unit_types);
200
201 30 return 0;
202 }
203
204 30 static av_cold void av1_parser_close(AVCodecParserContext *ctx)
205 {
206 30 AV1ParseContext *s = ctx->priv_data;
207
208 30 ff_cbs_fragment_free(&s->temporal_unit);
209 30 ff_cbs_close(&s->cbc);
210 30 }
211
212 const AVCodecParser ff_av1_parser = {
213 .codec_ids = { AV_CODEC_ID_AV1 },
214 .priv_data_size = sizeof(AV1ParseContext),
215 .parser_init = av1_parser_init,
216 .parser_close = av1_parser_close,
217 .parser_parse = av1_parser_parse,
218 };
219