FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/oggparseopus.c
Date: 2025-06-01 09:29:47
Exec Total Coverage
Lines: 96 113 85.0%
Functions: 4 4 100.0%
Branches: 53 74 71.6%
Line Branch Exec Source
1 /*
2 * Opus parser for Ogg
3 * Copyright (c) 2012 Nicolas George
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include <string.h>
23
24 #include "libavutil/intreadwrite.h"
25 #include "libavutil/mem.h"
26 #include "avformat.h"
27 #include "internal.h"
28 #include "oggdec.h"
29
30 struct oggopus_private {
31 int need_comments;
32 unsigned pre_skip;
33 int64_t cur_dts;
34 };
35
36 #define OPUS_SEEK_PREROLL_MS 80
37 #define OPUS_HEAD_SIZE 19
38
39 6 static int parse_opus_header(AVFormatContext *avf, AVStream *st, struct ogg_stream *os,
40 struct oggopus_private *priv, uint8_t *packet,
41 size_t psize)
42 {
43 int channels;
44 int ret;
45
46
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 6 if (psize < OPUS_HEAD_SIZE || (AV_RL8(packet + 8) & 0xF0) != 0)
47 ✗ return AVERROR_INVALIDDATA;
48
49 6 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
50 6 st->codecpar->codec_id = AV_CODEC_ID_OPUS;
51
52 6 channels = AV_RL8(packet + 9);
53
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 6 if (st->codecpar->ch_layout.nb_channels &&
54
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 1 channels != st->codecpar->ch_layout.nb_channels) {
55 ✗ av_log(avf, AV_LOG_ERROR, "Channel change is not supported\n");
56 ✗ return AVERROR_PATCHWELCOME;
57 }
58
59 6 st->codecpar->ch_layout.nb_channels = channels;
60
61 6 priv->pre_skip = AV_RL16(packet + 10);
62 6 st->codecpar->initial_padding = priv->pre_skip;
63 6 os->start_trimming = priv->pre_skip;
64 /*orig_sample_rate = AV_RL32(packet + 12);*/
65 /*gain = AV_RL16(packet + 16);*/
66 /*channel_map = AV_RL8 (packet + 18);*/
67
68 6 ret = ff_alloc_extradata(st->codecpar, os->psize);
69
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 6 if (ret < 0)
70 ✗ return ret;
71
72 6 memcpy(st->codecpar->extradata, packet, os->psize);
73
74 6 st->codecpar->sample_rate = 48000;
75 6 st->codecpar->seek_preroll = av_rescale(OPUS_SEEK_PREROLL_MS,
76 6 st->codecpar->sample_rate, 1000);
77 6 avpriv_set_pts_info(st, 64, 1, 48000);
78
79 6 priv->need_comments = 1;
80
81 6 return 1;
82 }
83
84 15 static int opus_header(AVFormatContext *avf, int idx)
85 {
86 15 struct ogg *ogg = avf->priv_data;
87 15 struct ogg_stream *os = &ogg->streams[idx];
88 15 AVStream *st = avf->streams[idx];
89 15 struct oggopus_private *priv = os->private;
90 15 uint8_t *packet = os->buf + os->pstart;
91
92
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 15 if (!priv) {
93 5 priv = os->private = av_mallocz(sizeof(*priv));
94
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 5 if (!priv)
95 ✗ return AVERROR(ENOMEM);
96 }
97
98
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 15 if (os->flags & OGG_FLAG_BOS)
99 5 return parse_opus_header(avf, st, os, priv, packet, os->psize);
100
101
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 10 if (priv->need_comments) {
102
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 5 if (os->psize < 8 || memcmp(packet, "OpusTags", 8))
103 ✗ return AVERROR_INVALIDDATA;
104 5 ff_vorbis_stream_comment(avf, st, packet + 8, os->psize - 8);
105 5 priv->need_comments--;
106 5 return 1;
107 }
108
109 5 return 0;
110 }
111
112 5399 static int opus_duration(uint8_t *src, int size)
113 {
114 5399 unsigned nb_frames = 1;
115 5399 unsigned toc = src[0];
116 5399 unsigned toc_config = toc >> 3;
117 5399 unsigned toc_count = toc & 3;
118
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 5496 unsigned frame_size = toc_config < 12 ? FFMAX(480, 960 * (toc_config & 3)) :
119
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 97 toc_config < 16 ? 480 << (toc_config & 1) :
120 97 120 << (toc_config & 3);
121
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 5399 if (toc_count == 3) {
122 ✗ if (size<2)
123 ✗ return AVERROR_INVALIDDATA;
124 ✗ nb_frames = src[1] & 0x3F;
125
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 5399 } else if (toc_count) {
126 ✗ nb_frames = 2;
127 }
128
129 5399 return frame_size * nb_frames;
130 }
131
132 301 static int opus_packet(AVFormatContext *avf, int idx)
133 {
134 301 struct ogg *ogg = avf->priv_data;
135 301 struct ogg_stream *os = &ogg->streams[idx];
136 301 AVStream *st = avf->streams[idx];
137 301 struct oggopus_private *priv = os->private;
138 301 uint8_t *packet = os->buf + os->pstart;
139 int ret;
140
141
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 301 if (!os->psize)
142 ✗ return AVERROR_INVALIDDATA;
143
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 301 if (os->granule > (1LL << 62)) {
144 ✗ av_log(avf, AV_LOG_ERROR, "Unsupported huge granule pos %"PRId64 "\n", os->granule);
145 ✗ return AVERROR_INVALIDDATA;
146 }
147
148
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 301 if (os->psize > 8 && !memcmp(packet, "OpusHead", 8)) {
149 1 ret = parse_opus_header(avf, st, os, priv, packet, os->psize);
150
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 1 if (ret < 0)
151 ✗ return ret;
152
153 1 return 1;
154 }
155
156
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 300 if (os->psize > 8 && !memcmp(packet, "OpusTags", 8)) {
157 1 priv->need_comments = 0;
158 1 return 1;
159 }
160
161
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 299 if ((!os->lastpts || os->lastpts == AV_NOPTS_VALUE) && !(os->flags & OGG_FLAG_EOS)) {
162 int seg, d;
163 int duration;
164 200 uint8_t *last_pkt = os->buf + os->pstart;
165 200 uint8_t *next_pkt = last_pkt;
166
167 200 duration = 0;
168 200 seg = os->segp;
169 200 d = opus_duration(last_pkt, os->psize);
170
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 200 if (d < 0) {
171 ✗ os->pflags |= AV_PKT_FLAG_CORRUPT;
172 ✗ return 0;
173 }
174 200 duration += d;
175 200 last_pkt = next_pkt = next_pkt + os->psize;
176
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 5100 for (; seg < os->nsegs; seg++) {
177 4900 next_pkt += os->segments[seg];
178
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 4900 if (os->segments[seg] < 255 && next_pkt != last_pkt) {
179 4900 int d = opus_duration(last_pkt, next_pkt - last_pkt);
180
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 4900 if (d > 0)
181 4900 duration += d;
182 4900 last_pkt = next_pkt;
183 }
184 }
185 200 os->lastpts =
186 200 os->lastdts = os->granule - duration;
187 }
188
189
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 299 if ((ret = opus_duration(packet, os->psize)) < 0)
190 ✗ return ret;
191
192 299 os->pduration = ret;
193
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 299 if (os->lastpts != AV_NOPTS_VALUE) {
194
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 209 if (st->start_time == AV_NOPTS_VALUE)
195 5 st->start_time = os->lastpts;
196 209 priv->cur_dts = os->lastdts = os->lastpts -= priv->pre_skip;
197 }
198
199 299 priv->cur_dts += os->pduration;
200
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 299 if ((os->flags & OGG_FLAG_EOS)) {
201 97 int64_t skip = priv->cur_dts - os->granule + priv->pre_skip;
202 97 skip = FFMIN(skip, os->pduration);
203
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 97 if (skip > 0) {
204
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 4 os->pduration = skip < os->pduration ? os->pduration - skip : 1;
205 4 os->end_trimming = skip;
206 4 av_log(avf, AV_LOG_DEBUG,
207 "Last packet was truncated to %d due to end trimming.\n",
208 os->pduration);
209 }
210 }
211
212 299 return 0;
213 }
214
215 const struct ogg_codec ff_opus_codec = {
216 .name = "Opus",
217 .magic = "OpusHead",
218 .magicsize = 8,
219 .header = opus_header,
220 .packet = opus_packet,
221 .nb_header = 1,
222 };
223