FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/av1_parser.c
Date: 2025-01-20 09:27:23
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/avassert.h"
24
25 #include "av1_parse.h"
26 #include "cbs.h"
27 #include "cbs_av1.h"
28 #include "parser.h"
29
30 typedef struct AV1ParseContext {
31 CodedBitstreamContext *cbc;
32 CodedBitstreamFragment temporal_unit;
33 int parsed_extradata;
34 } AV1ParseContext;
35
36 static const enum AVPixelFormat pix_fmts_8bit[2][2] = {
37 { AV_PIX_FMT_YUV444P, AV_PIX_FMT_NONE },
38 { AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P },
39 };
40 static const enum AVPixelFormat pix_fmts_10bit[2][2] = {
41 { AV_PIX_FMT_YUV444P10, AV_PIX_FMT_NONE },
42 { AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV420P10 },
43 };
44 static const enum AVPixelFormat pix_fmts_12bit[2][2] = {
45 { AV_PIX_FMT_YUV444P12, AV_PIX_FMT_NONE },
46 { AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV420P12 },
47 };
48
49 static const enum AVPixelFormat pix_fmts_rgb[3] = {
50 AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRP12,
51 };
52
53 665 static int av1_parser_parse(AVCodecParserContext *ctx,
54 AVCodecContext *avctx,
55 const uint8_t **out_data, int *out_size,
56 const uint8_t *data, int size)
57 {
58 665 AV1ParseContext *s = ctx->priv_data;
59 665 CodedBitstreamFragment *td = &s->temporal_unit;
60 665 const CodedBitstreamAV1Context *av1 = s->cbc->priv_data;
61 const AV1RawSequenceHeader *seq;
62 const AV1RawColorConfig *color;
63 int ret;
64
65 665 *out_data = data;
66 665 *out_size = size;
67
68 665 ctx->key_frame = -1;
69 665 ctx->pict_type = AV_PICTURE_TYPE_NONE;
70 665 ctx->picture_structure = AV_PICTURE_STRUCTURE_UNKNOWN;
71
72 665 s->cbc->log_ctx = avctx;
73
74
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 665 if (avctx->extradata_size && !s->parsed_extradata) {
75 27 s->parsed_extradata = 1;
76
77 27 ret = ff_cbs_read_extradata_from_codec(s->cbc, td, avctx);
78
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 27 if (ret < 0) {
79 ✗ av_log(avctx, AV_LOG_WARNING, "Failed to parse extradata.\n");
80 }
81
82 27 ff_cbs_fragment_reset(td);
83 }
84
85 665 ret = ff_cbs_read(s->cbc, td, data, size);
86
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 665 if (ret < 0) {
87 ✗ av_log(avctx, AV_LOG_ERROR, "Failed to parse temporal unit.\n");
88 ✗ goto end;
89 }
90
91
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 665 if (!av1->sequence_header) {
92 ✗ av_log(avctx, AV_LOG_ERROR, "No sequence header available\n");
93 ✗ goto end;
94 }
95
96 665 seq = av1->sequence_header;
97 665 color = &seq->color_config;
98
99
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 2468 for (int i = 0; i < td->nb_units; i++) {
100 1803 const CodedBitstreamUnit *unit = &td->units[i];
101 1803 const AV1RawOBU *obu = unit->content;
102 const AV1RawFrameHeader *frame;
103
104
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 1803 if (unit->type == AV1_OBU_FRAME)
105 652 frame = &obu->obu.frame.header;
106
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 1151 else if (unit->type == AV1_OBU_FRAME_HEADER)
107 156 frame = &obu->obu.frame_header;
108 else
109 995 continue;
110
111
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 808 if (obu->header.spatial_id > 0)
112 16 continue;
113
114
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 792 if (!frame->show_frame && !frame->show_existing_frame)
115 155 continue;
116
117 637 ctx->width = frame->frame_width_minus_1 + 1;
118 637 ctx->height = frame->frame_height_minus_1 + 1;
119
120
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 637 ctx->key_frame = frame->frame_type == AV1_FRAME_KEY && !frame->show_existing_frame;
121
122
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 637 switch (frame->frame_type) {
123 71 case AV1_FRAME_KEY:
124 case AV1_FRAME_INTRA_ONLY:
125 71 ctx->pict_type = AV_PICTURE_TYPE_I;
126 71 break;
127 565 case AV1_FRAME_INTER:
128 565 ctx->pict_type = AV_PICTURE_TYPE_P;
129 565 break;
130 1 case AV1_FRAME_SWITCH:
131 1 ctx->pict_type = AV_PICTURE_TYPE_SP;
132 1 break;
133 }
134 637 ctx->picture_structure = AV_PICTURE_STRUCTURE_FRAME;
135 }
136
137
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 665 switch (av1->bit_depth) {
138 654 case 8:
139 1308 ctx->format = color->mono_chrome ? AV_PIX_FMT_GRAY8
140
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 654 : pix_fmts_8bit [color->subsampling_x][color->subsampling_y];
141 654 break;
142 11 case 10:
143 22 ctx->format = color->mono_chrome ? AV_PIX_FMT_GRAY10
144
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 11 : pix_fmts_10bit[color->subsampling_x][color->subsampling_y];
145 11 break;
146 ✗ case 12:
147 ✗ ctx->format = color->mono_chrome ? AV_PIX_FMT_GRAY12
148 ✗ : pix_fmts_12bit[color->subsampling_x][color->subsampling_y];
149 ✗ break;
150 }
151 av_assert2(ctx->format != AV_PIX_FMT_NONE);
152
153
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 665 if (!color->subsampling_x && !color->subsampling_y &&
154 ✗ color->matrix_coefficients == AVCOL_SPC_RGB &&
155 ✗ color->color_primaries == AVCOL_PRI_BT709 &&
156 ✗ color->transfer_characteristics == AVCOL_TRC_IEC61966_2_1)
157 ✗ ctx->format = pix_fmts_rgb[color->high_bitdepth + color->twelve_bit];
158
159 665 avctx->profile = seq->seq_profile;
160 665 avctx->level = seq->seq_level_idx[0];
161
162 665 avctx->colorspace = (enum AVColorSpace) color->matrix_coefficients;
163 665 avctx->color_primaries = (enum AVColorPrimaries) color->color_primaries;
164 665 avctx->color_trc = (enum AVColorTransferCharacteristic) color->transfer_characteristics;
165
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 665 avctx->color_range = color->color_range ? AVCOL_RANGE_JPEG : AVCOL_RANGE_MPEG;
166
167
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 665 if (seq->timing_info_present_flag)
168 270 avctx->framerate = ff_av1_framerate(1LL + seq->timing_info.num_ticks_per_picture_minus_1,
169 270 seq->timing_info.num_units_in_display_tick,
170 270 seq->timing_info.time_scale);
171
172 395 end:
173 665 ff_cbs_fragment_reset(td);
174
175 665 s->cbc->log_ctx = NULL;
176
177 665 return size;
178 }
179
180 static const CodedBitstreamUnitType decompose_unit_types[] = {
181 AV1_OBU_TEMPORAL_DELIMITER,
182 AV1_OBU_SEQUENCE_HEADER,
183 AV1_OBU_FRAME_HEADER,
184 AV1_OBU_TILE_GROUP,
185 AV1_OBU_FRAME,
186 };
187
188 30 static av_cold int av1_parser_init(AVCodecParserContext *ctx)
189 {
190 30 AV1ParseContext *s = ctx->priv_data;
191 int ret;
192
193 30 ret = ff_cbs_init(&s->cbc, AV_CODEC_ID_AV1, NULL);
194
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 30 if (ret < 0)
195 ✗ return ret;
196
197 30 s->cbc->decompose_unit_types = decompose_unit_types;
198 30 s->cbc->nb_decompose_unit_types = FF_ARRAY_ELEMS(decompose_unit_types);
199
200 30 return 0;
201 }
202
203 30 static void av1_parser_close(AVCodecParserContext *ctx)
204 {
205 30 AV1ParseContext *s = ctx->priv_data;
206
207 30 ff_cbs_fragment_free(&s->temporal_unit);
208 30 ff_cbs_close(&s->cbc);
209 30 }
210
211 const AVCodecParser ff_av1_parser = {
212 .codec_ids = { AV_CODEC_ID_AV1 },
213 .priv_data_size = sizeof(AV1ParseContext),
214 .parser_init = av1_parser_init,
215 .parser_close = av1_parser_close,
216 .parser_parse = av1_parser_parse,
217 };
218