FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/av1_parser.c
Date: 2022-07-05 19:52:29
Exec Total Coverage
Lines: 80 94 85.1%
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 #include "cbs.h"
25 #include "cbs_av1.h"
26 #include "parser.h"
27
28 typedef struct AV1ParseContext {
29 CodedBitstreamContext *cbc;
30 CodedBitstreamFragment temporal_unit;
31 int parsed_extradata;
32 } AV1ParseContext;
33
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 },
37 };
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 },
41 };
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 },
45 };
46
47 static const enum AVPixelFormat pix_fmts_rgb[3] = {
48 AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRP12,
49 };
50
51 375 static int av1_parser_parse(AVCodecParserContext *ctx,
52 AVCodecContext *avctx,
53 const uint8_t **out_data, int *out_size,
54 const uint8_t *data, int size)
55 {
56 375 AV1ParseContext *s = ctx->priv_data;
57 375 CodedBitstreamFragment *td = &s->temporal_unit;
58 375 const CodedBitstreamAV1Context *av1 = s->cbc->priv_data;
59 const AV1RawSequenceHeader *seq;
60 const AV1RawColorConfig *color;
61 int ret;
62
63 375 *out_data = data;
64 375 *out_size = size;
65
66 375 ctx->key_frame = -1;
67 375 ctx->pict_type = AV_PICTURE_TYPE_NONE;
68 375 ctx->picture_structure = AV_PICTURE_STRUCTURE_UNKNOWN;
69
70 375 s->cbc->log_ctx = avctx;
71
72
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375 if (avctx->extradata_size && !s->parsed_extradata) {
73 22 s->parsed_extradata = 1;
74
75 22 ret = ff_cbs_read_extradata_from_codec(s->cbc, td, avctx);
76
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22 if (ret < 0) {
77 av_log(avctx, AV_LOG_WARNING, "Failed to parse extradata.\n");
78 }
79
80 22 ff_cbs_fragment_reset(td);
81 }
82
83 375 ret = ff_cbs_read(s->cbc, td, data, size);
84
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375 if (ret < 0) {
85 av_log(avctx, AV_LOG_ERROR, "Failed to parse temporal unit.\n");
86 goto end;
87 }
88
89
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375 if (!av1->sequence_header) {
90 av_log(avctx, AV_LOG_ERROR, "No sequence header available\n");
91 goto end;
92 }
93
94 375 seq = av1->sequence_header;
95 375 color = &seq->color_config;
96
97
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1404 for (int i = 0; i < td->nb_units; i++) {
98 1029 const CodedBitstreamUnit *unit = &td->units[i];
99 1029 const AV1RawOBU *obu = unit->content;
100 const AV1RawFrameHeader *frame;
101
102
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1029 if (unit->type == AV1_OBU_FRAME)
103 350 frame = &obu->obu.frame.header;
104
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679 else if (unit->type == AV1_OBU_FRAME_HEADER)
105 91 frame = &obu->obu.frame_header;
106 else
107 588 continue;
108
109
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441 if (obu->header.spatial_id > 0)
110 16 continue;
111
112
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425 if (!frame->show_frame && !frame->show_existing_frame)
113 72 continue;
114
115 353 ctx->width = frame->frame_width_minus_1 + 1;
116 353 ctx->height = frame->frame_height_minus_1 + 1;
117
118
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353 ctx->key_frame = frame->frame_type == AV1_FRAME_KEY && !frame->show_existing_frame;
119
120
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353 switch (frame->frame_type) {
121 62 case AV1_FRAME_KEY:
122 case AV1_FRAME_INTRA_ONLY:
123 62 ctx->pict_type = AV_PICTURE_TYPE_I;
124 62 break;
125 290 case AV1_FRAME_INTER:
126 290 ctx->pict_type = AV_PICTURE_TYPE_P;
127 290 break;
128 1 case AV1_FRAME_SWITCH:
129 1 ctx->pict_type = AV_PICTURE_TYPE_SP;
130 1 break;
131 }
132 353 ctx->picture_structure = AV_PICTURE_STRUCTURE_FRAME;
133 }
134
135
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375 switch (av1->bit_depth) {
136 364 case 8:
137 728 ctx->format = color->mono_chrome ? AV_PIX_FMT_GRAY8
138
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364 : pix_fmts_8bit [color->subsampling_x][color->subsampling_y];
139 364 break;
140 11 case 10:
141 22 ctx->format = color->mono_chrome ? AV_PIX_FMT_GRAY10
142
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11 : pix_fmts_10bit[color->subsampling_x][color->subsampling_y];
143 11 break;
144 case 12:
145 ctx->format = color->mono_chrome ? AV_PIX_FMT_GRAY12
146 : pix_fmts_12bit[color->subsampling_x][color->subsampling_y];
147 break;
148 }
149 av_assert2(ctx->format != AV_PIX_FMT_NONE);
150
151
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375 if (!color->subsampling_x && !color->subsampling_y &&
152 color->matrix_coefficients == AVCOL_SPC_RGB &&
153 color->color_primaries == AVCOL_PRI_BT709 &&
154 color->transfer_characteristics == AVCOL_TRC_IEC61966_2_1)
155 ctx->format = pix_fmts_rgb[color->high_bitdepth + color->twelve_bit];
156
157 375 avctx->profile = seq->seq_profile;
158 375 avctx->level = seq->seq_level_idx[0];
159
160 375 avctx->colorspace = (enum AVColorSpace) color->matrix_coefficients;
161 375 avctx->color_primaries = (enum AVColorPrimaries) color->color_primaries;
162 375 avctx->color_trc = (enum AVColorTransferCharacteristic) color->transfer_characteristics;
163
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375 avctx->color_range = color->color_range ? AVCOL_RANGE_JPEG : AVCOL_RANGE_MPEG;
164
165
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375 if (avctx->framerate.num)
166 100 avctx->time_base = av_inv_q(av_mul_q(avctx->framerate, (AVRational){avctx->ticks_per_frame, 1}));
167
168 275 end:
169 375 ff_cbs_fragment_reset(td);
170
171 375 s->cbc->log_ctx = NULL;
172
173 375 return size;
174 }
175
176 static const CodedBitstreamUnitType decompose_unit_types[] = {
177 AV1_OBU_TEMPORAL_DELIMITER,
178 AV1_OBU_SEQUENCE_HEADER,
179 AV1_OBU_FRAME_HEADER,
180 AV1_OBU_TILE_GROUP,
181 AV1_OBU_FRAME,
182 };
183
184 22 static av_cold int av1_parser_init(AVCodecParserContext *ctx)
185 {
186 22 AV1ParseContext *s = ctx->priv_data;
187 int ret;
188
189 22 ret = ff_cbs_init(&s->cbc, AV_CODEC_ID_AV1, NULL);
190
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22 if (ret < 0)
191 return ret;
192
193 22 s->cbc->decompose_unit_types = decompose_unit_types;
194 22 s->cbc->nb_decompose_unit_types = FF_ARRAY_ELEMS(decompose_unit_types);
195
196 22 return 0;
197 }
198
199 22 static void av1_parser_close(AVCodecParserContext *ctx)
200 {
201 22 AV1ParseContext *s = ctx->priv_data;
202
203 22 ff_cbs_fragment_free(&s->temporal_unit);
204 22 ff_cbs_close(&s->cbc);
205 22 }
206
207 const AVCodecParser ff_av1_parser = {
208 .codec_ids = { AV_CODEC_ID_AV1 },
209 .priv_data_size = sizeof(AV1ParseContext),
210 .parser_init = av1_parser_init,
211 .parser_close = av1_parser_close,
212 .parser_parse = av1_parser_parse,
213 };
214