FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/riffdec.c
Date: 2026-04-24 19:58:39
Exec Total Coverage
Lines: 122 184 66.3%
Functions: 7 7 100.0%
Branches: 63 116 54.3%
Line Branch Exec Source
1 /*
2 * RIFF demuxing functions and data
3 * Copyright (c) 2000 Fabrice Bellard
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 "libavutil/avassert.h"
23 #include "libavutil/dict.h"
24 #include "libavutil/error.h"
25 #include "libavutil/intreadwrite.h"
26 #include "libavutil/log.h"
27 #include "libavutil/mem.h"
28 #include "avformat.h"
29 #include "avio_internal.h"
30 #include "demux.h"
31 #include "riff.h"
32
33 2253 int ff_get_guid(AVIOContext *s, ff_asf_guid *g)
34 {
35 int ret;
36 av_assert0(sizeof(*g) == 16); //compiler will optimize this out
37 2253 ret = ffio_read_size(s, *g, sizeof(*g));
38
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 2253 if (ret < 0) {
39 10 memset(*g, 0, sizeof(*g));
40 10 return ret;
41 }
42 2243 return 0;
43 }
44
45 10 enum AVCodecID ff_codec_guid_get_id(const AVCodecGuid *guids, ff_asf_guid guid)
46 {
47 int i;
48
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 34 for (i = 0; guids[i].id != AV_CODEC_ID_NONE; i++)
49
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 34 if (!ff_guidcmp(guids[i].guid, guid))
50 10 return guids[i].id;
51 ✗ return AV_CODEC_ID_NONE;
52 }
53
54 /* We could be given one of the three possible structures here:
55 * WAVEFORMAT, PCMWAVEFORMAT or WAVEFORMATEX. Each structure
56 * is an expansion of the previous one with the fields added
57 * at the bottom. PCMWAVEFORMAT adds 'WORD wBitsPerSample' and
58 * WAVEFORMATEX adds 'WORD cbSize' and basically makes itself
59 * an openended structure.
60 */
61
62 16 static void parse_waveformatex(void *logctx, AVIOContext *pb, AVCodecParameters *par)
63 {
64 ff_asf_guid subformat;
65 int bps;
66 uint64_t mask;
67
68 16 bps = avio_rl16(pb);
69
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 16 if (bps)
70 16 par->bits_per_coded_sample = bps;
71
72 16 mask = avio_rl32(pb); /* dwChannelMask */
73 16 av_channel_layout_from_mask(&par->ch_layout, mask);
74
75 16 ff_get_guid(pb, &subformat);
76 16 if (!memcmp(subformat + 4,
77
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 16 (const uint8_t[]){ FF_AMBISONIC_BASE_GUID }, 12) ||
78 16 !memcmp(subformat + 4,
79
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 16 (const uint8_t[]){ FF_BROKEN_BASE_GUID }, 12) ||
80 16 !memcmp(subformat + 4,
81
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 16 (const uint8_t[]){ FF_MEDIASUBTYPE_BASE_GUID }, 12)) {
82 16 par->codec_tag = AV_RL32(subformat);
83 16 par->codec_id = ff_wav_codec_get_id(par->codec_tag,
84 par->bits_per_coded_sample);
85 } else {
86 ✗ par->codec_id = ff_codec_guid_get_id(ff_codec_wav_guids, subformat);
87 ✗ if (!par->codec_id)
88 ✗ av_log(logctx, AV_LOG_WARNING,
89 "unknown subformat:"FF_PRI_GUID"\n",
90 ✗ FF_ARG_GUID(subformat));
91 }
92 16 }
93
94 /* "big_endian" values are needed for RIFX file format */
95 661 int ff_get_wav_header(AVFormatContext *s, AVIOContext *pb,
96 AVCodecParameters *par, int size, int big_endian)
97 {
98 661 int id, channels = 0, ret;
99 661 uint64_t bitrate = 0;
100
101
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 661 if (size < 14) {
102 ✗ avpriv_request_sample(s, "wav header size < 14");
103 ✗ return AVERROR_INVALIDDATA;
104 }
105
106 661 av_channel_layout_uninit(&par->ch_layout);
107
108 661 par->codec_type = AVMEDIA_TYPE_AUDIO;
109
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 661 if (!big_endian) {
110 661 id = avio_rl16(pb);
111
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 661 if (id != 0x0165) {
112 661 channels = avio_rl16(pb);
113 661 par->sample_rate = avio_rl32(pb);
114 661 bitrate = avio_rl32(pb) * 8LL;
115 661 par->block_align = avio_rl16(pb);
116 }
117 } else {
118 ✗ id = avio_rb16(pb);
119 ✗ channels = avio_rb16(pb);
120 ✗ par->sample_rate = avio_rb32(pb);
121 ✗ bitrate = avio_rb32(pb) * 8LL;
122 ✗ par->block_align = avio_rb16(pb);
123 }
124
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 661 if (size == 14) { /* We're dealing with plain vanilla WAVEFORMAT */
125 ✗ par->bits_per_coded_sample = 8;
126 } else {
127
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 661 if (!big_endian) {
128 661 par->bits_per_coded_sample = avio_rl16(pb);
129 } else {
130 ✗ par->bits_per_coded_sample = avio_rb16(pb);
131 }
132 }
133
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 661 if (id == 0xFFFE) {
134 16 par->codec_tag = 0;
135 } else {
136 645 par->codec_tag = id;
137 645 par->codec_id = ff_wav_codec_get_id(id,
138 par->bits_per_coded_sample);
139 }
140
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 1284 if (size >= 18 && id != 0x0165) { /* We're obviously dealing with WAVEFORMATEX */
141 623 int cbSize = avio_rl16(pb); /* cbSize */
142
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 623 if (big_endian) {
143 ✗ avpriv_report_missing_feature(s, "WAVEFORMATEX support for RIFX files");
144 ✗ return AVERROR_PATCHWELCOME;
145 }
146 623 size -= 18;
147 623 cbSize = FFMIN(size, cbSize);
148
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 623 if (cbSize >= 22 && id == 0xfffe) { /* WAVEFORMATEXTENSIBLE */
149 16 parse_waveformatex(s, pb, par);
150 16 cbSize -= 22;
151 16 size -= 22;
152
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 607 } else if (cbSize >= 12 && id == 0x1610) { /* HEAACWAVEFORMAT */
153 ✗ int wPayloadType = avio_rl16(pb);
154 ✗ if (wPayloadType == 3)
155 ✗ par->codec_id = AV_CODEC_ID_AAC_LATM;
156 ✗ avio_skip(pb, 2); // wAudioProfileLevelIndication
157 ✗ int wStructType = avio_rl16(pb);
158 ✗ if (wStructType) {
159 ✗ avpriv_report_missing_feature(s, "HEAACWAVEINFO wStructType \"%d\"", wStructType);
160 ✗ return AVERROR_PATCHWELCOME;
161 }
162 ✗ avio_skip(pb, 2); // wReserved1
163 ✗ avio_skip(pb, 4); // dwReserved2
164 ✗ cbSize -= 12;
165 ✗ size -= 12;
166 }
167
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 623 if (cbSize > 0) {
168 71 ret = ff_get_extradata(s, par, pb, cbSize);
169
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 71 if (ret < 0)
170 ✗ return ret;
171 71 size -= cbSize;
172 }
173
174 /* It is possible for the chunk to contain garbage at the end */
175
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 623 if (size > 0)
176 5 avio_skip(pb, size);
177
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 38 } else if (id == 0x0165 && size >= 32) {
178 int nb_streams, i;
179
180 ✗ size -= 4;
181 ✗ ret = ff_get_extradata(s, par, pb, size);
182 ✗ if (ret < 0)
183 ✗ return ret;
184 ✗ nb_streams = AV_RL16(par->extradata + 4);
185 ✗ par->sample_rate = AV_RL32(par->extradata + 12);
186 ✗ channels = 0;
187 ✗ bitrate = 0;
188 ✗ if (size < 8 + nb_streams * 20)
189 ✗ return AVERROR_INVALIDDATA;
190 ✗ for (i = 0; i < nb_streams; i++)
191 ✗ channels += par->extradata[8 + i * 20 + 17];
192 }
193
194 661 par->bit_rate = bitrate;
195
196
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 661 if (par->sample_rate <= 0) {
197 ✗ av_log(s, AV_LOG_ERROR,
198 "Invalid sample rate: %d\n", par->sample_rate);
199 ✗ return AVERROR_INVALIDDATA;
200 }
201
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 661 if (par->codec_id == AV_CODEC_ID_AAC_LATM) {
202 /* Channels and sample_rate values are those prior to applying SBR
203 * and/or PS. */
204 ✗ channels = 0;
205 ✗ par->sample_rate = 0;
206 }
207 /* override bits_per_coded_sample for G.726 */
208
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 661 if (par->codec_id == AV_CODEC_ID_ADPCM_G726 && par->sample_rate)
209 4 par->bits_per_coded_sample = par->bit_rate / par->sample_rate;
210
211 /* ignore WAVEFORMATEXTENSIBLE layout if different from channel count */
212
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 661 if (channels != par->ch_layout.nb_channels) {
213 654 av_channel_layout_uninit(&par->ch_layout);
214 654 par->ch_layout.order = AV_CHANNEL_ORDER_UNSPEC;
215 654 par->ch_layout.nb_channels = channels;
216 }
217
218 661 return 0;
219 }
220
221 663 enum AVCodecID ff_wav_codec_get_id(unsigned int tag, int bps)
222 {
223 enum AVCodecID id;
224 663 id = ff_codec_get_id(ff_codec_wav_tags, tag);
225
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 663 if (id <= 0)
226 1 return id;
227
228
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 662 if (id == AV_CODEC_ID_PCM_S16LE)
229 569 id = ff_get_pcm_codec_id(bps, 0, 0, ~1);
230
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 93 else if (id == AV_CODEC_ID_PCM_F32LE)
231 4 id = ff_get_pcm_codec_id(bps, 1, 0, 0);
232
233
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 662 if (id == AV_CODEC_ID_ADPCM_IMA_WAV && bps == 8)
234 ✗ id = AV_CODEC_ID_ADPCM_ZORK;
235 662 return id;
236 }
237
238 475 int ff_get_bmp_header(AVIOContext *pb, AVStream *st, uint32_t *size)
239 {
240 int tag1;
241 475 uint32_t size_ = avio_rl32(pb);
242
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 475 if (size)
243 471 *size = size_;
244 475 st->codecpar->width = avio_rl32(pb);
245 475 st->codecpar->height = (int32_t)avio_rl32(pb);
246 475 avio_rl16(pb); /* planes */
247 475 st->codecpar->bits_per_coded_sample = avio_rl16(pb); /* depth */
248 475 tag1 = avio_rl32(pb);
249 475 avio_rl32(pb); /* ImageSize */
250 475 avio_rl32(pb); /* XPelsPerMeter */
251 475 avio_rl32(pb); /* YPelsPerMeter */
252 475 avio_rl32(pb); /* ClrUsed */
253 475 avio_rl32(pb); /* ClrImportant */
254 475 return tag1;
255 }
256
257 89 int ff_read_riff_info(AVFormatContext *s, int64_t size)
258 {
259 int64_t start, end, cur;
260 89 AVIOContext *pb = s->pb;
261
262 89 start = avio_tell(pb);
263 89 end = start + size;
264
265
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 193 while ((cur = avio_tell(pb)) >= 0 &&
266
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 193 cur <= end - 8 /* = tag + size */) {
267 uint32_t chunk_code;
268 int64_t chunk_size;
269 104 char key[5] = { 0 };
270 char *value;
271
272 104 chunk_code = avio_rl32(pb);
273 104 chunk_size = avio_rl32(pb);
274
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 104 if (avio_feof(pb)) {
275 ✗ if (chunk_code || chunk_size) {
276 ✗ av_log(s, AV_LOG_WARNING, "INFO subchunk truncated\n");
277 ✗ return AVERROR_INVALIDDATA;
278 }
279 ✗ return AVERROR_EOF;
280 }
281
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 104 if (chunk_size > end ||
282
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 104 end - chunk_size < cur ||
283 chunk_size == UINT_MAX) {
284 ✗ avio_seek(pb, -9, SEEK_CUR);
285 ✗ chunk_code = avio_rl32(pb);
286 ✗ chunk_size = avio_rl32(pb);
287 ✗ if (chunk_size > end || end - chunk_size < cur || chunk_size == UINT_MAX) {
288 ✗ av_log(s, AV_LOG_WARNING, "too big INFO subchunk\n");
289 ✗ return AVERROR_INVALIDDATA;
290 }
291 }
292
293 104 chunk_size += (chunk_size & 1);
294
295
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 104 if (!chunk_code) {
296
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 2 if (chunk_size)
297 2 avio_skip(pb, chunk_size);
298 ✗ else if (pb->eof_reached) {
299 ✗ av_log(s, AV_LOG_WARNING, "truncated file\n");
300 ✗ return AVERROR_EOF;
301 }
302 2 continue;
303 }
304
305 102 value = av_mallocz(chunk_size + 1);
306
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 102 if (!value) {
307 ✗ av_log(s, AV_LOG_ERROR,
308 "out of memory, unable to read INFO tag\n");
309 ✗ return AVERROR(ENOMEM);
310 }
311
312 102 AV_WL32(key, chunk_code);
313 // Work around VC++ 2015 Update 1 code-gen bug:
314 // https://connect.microsoft.com/VisualStudio/feedback/details/2291638
315 102 key[4] = 0;
316
317
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 102 if (avio_read(pb, value, chunk_size) != chunk_size) {
318 ✗ av_log(s, AV_LOG_WARNING,
319 "premature end of file while reading INFO tag\n");
320 }
321
322 102 av_dict_set(&s->metadata, key, value, AV_DICT_DONT_STRDUP_VAL);
323 }
324
325 89 return 0;
326 }
327