FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/riffdec.c
Date: 2023-10-02 11:06:47
Exec Total Coverage
Lines: 121 171 70.8%
Functions: 7 7 100.0%
Branches: 60 108 55.6%
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 "avformat.h"
28 #include "avio_internal.h"
29 #include "demux.h"
30 #include "riff.h"
31
32 2256 int ff_get_guid(AVIOContext *s, ff_asf_guid *g)
33 {
34 int ret;
35 av_assert0(sizeof(*g) == 16); //compiler will optimize this out
36 2256 ret = ffio_read_size(s, *g, sizeof(*g));
37
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 2256 if (ret < 0) {
38 10 memset(*g, 0, sizeof(*g));
39 10 return ret;
40 }
41 2246 return 0;
42 }
43
44 10 enum AVCodecID ff_codec_guid_get_id(const AVCodecGuid *guids, ff_asf_guid guid)
45 {
46 int i;
47
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 34 for (i = 0; guids[i].id != AV_CODEC_ID_NONE; i++)
48
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 34 if (!ff_guidcmp(guids[i].guid, guid))
49 10 return guids[i].id;
50 ✗ return AV_CODEC_ID_NONE;
51 }
52
53 /* We could be given one of the three possible structures here:
54 * WAVEFORMAT, PCMWAVEFORMAT or WAVEFORMATEX. Each structure
55 * is an expansion of the previous one with the fields added
56 * at the bottom. PCMWAVEFORMAT adds 'WORD wBitsPerSample' and
57 * WAVEFORMATEX adds 'WORD cbSize' and basically makes itself
58 * an openended structure.
59 */
60
61 19 static void parse_waveformatex(void *logctx, AVIOContext *pb, AVCodecParameters *par)
62 {
63 ff_asf_guid subformat;
64 int bps;
65 uint64_t mask;
66
67 19 bps = avio_rl16(pb);
68
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 19 if (bps)
69 19 par->bits_per_coded_sample = bps;
70
71 19 mask = avio_rl32(pb); /* dwChannelMask */
72 19 av_channel_layout_from_mask(&par->ch_layout, mask);
73
74 19 ff_get_guid(pb, &subformat);
75 19 if (!memcmp(subformat + 4,
76
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 19 (const uint8_t[]){ FF_AMBISONIC_BASE_GUID }, 12) ||
77 19 !memcmp(subformat + 4,
78
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 19 (const uint8_t[]){ FF_BROKEN_BASE_GUID }, 12) ||
79 19 !memcmp(subformat + 4,
80
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 19 (const uint8_t[]){ FF_MEDIASUBTYPE_BASE_GUID }, 12)) {
81 19 par->codec_tag = AV_RL32(subformat);
82 19 par->codec_id = ff_wav_codec_get_id(par->codec_tag,
83 par->bits_per_coded_sample);
84 } else {
85 ✗ par->codec_id = ff_codec_guid_get_id(ff_codec_wav_guids, subformat);
86 ✗ if (!par->codec_id)
87 ✗ av_log(logctx, AV_LOG_WARNING,
88 "unknown subformat:"FF_PRI_GUID"\n",
89 ✗ FF_ARG_GUID(subformat));
90 }
91 19 }
92
93 /* "big_endian" values are needed for RIFX file format */
94 622 int ff_get_wav_header(void *logctx, AVIOContext *pb,
95 AVCodecParameters *par, int size, int big_endian)
96 {
97 622 int id, channels = 0, ret;
98 622 uint64_t bitrate = 0;
99
100
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 622 if (size < 14) {
101 ✗ avpriv_request_sample(logctx, "wav header size < 14");
102 ✗ return AVERROR_INVALIDDATA;
103 }
104
105 622 av_channel_layout_uninit(&par->ch_layout);
106
107 622 par->codec_type = AVMEDIA_TYPE_AUDIO;
108
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 622 if (!big_endian) {
109 622 id = avio_rl16(pb);
110
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 622 if (id != 0x0165) {
111 622 channels = avio_rl16(pb);
112 622 par->sample_rate = avio_rl32(pb);
113 622 bitrate = avio_rl32(pb) * 8LL;
114 622 par->block_align = avio_rl16(pb);
115 }
116 } else {
117 ✗ id = avio_rb16(pb);
118 ✗ channels = avio_rb16(pb);
119 ✗ par->sample_rate = avio_rb32(pb);
120 ✗ bitrate = avio_rb32(pb) * 8LL;
121 ✗ par->block_align = avio_rb16(pb);
122 }
123
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 622 if (size == 14) { /* We're dealing with plain vanilla WAVEFORMAT */
124 ✗ par->bits_per_coded_sample = 8;
125 } else {
126
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 622 if (!big_endian) {
127 622 par->bits_per_coded_sample = avio_rl16(pb);
128 } else {
129 ✗ par->bits_per_coded_sample = avio_rb16(pb);
130 }
131 }
132
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 622 if (id == 0xFFFE) {
133 19 par->codec_tag = 0;
134 } else {
135 603 par->codec_tag = id;
136 603 par->codec_id = ff_wav_codec_get_id(id,
137 par->bits_per_coded_sample);
138 }
139
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 1209 if (size >= 18 && id != 0x0165) { /* We're obviously dealing with WAVEFORMATEX */
140 587 int cbSize = avio_rl16(pb); /* cbSize */
141
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 587 if (big_endian) {
142 ✗ avpriv_report_missing_feature(logctx, "WAVEFORMATEX support for RIFX files");
143 ✗ return AVERROR_PATCHWELCOME;
144 }
145 587 size -= 18;
146 587 cbSize = FFMIN(size, cbSize);
147
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 587 if (cbSize >= 22 && id == 0xfffe) { /* WAVEFORMATEXTENSIBLE */
148 19 parse_waveformatex(logctx, pb, par);
149 19 cbSize -= 22;
150 19 size -= 22;
151 }
152
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 587 if (cbSize > 0) {
153 67 ret = ff_get_extradata(logctx, par, pb, cbSize);
154
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 67 if (ret < 0)
155 ✗ return ret;
156 67 size -= cbSize;
157 }
158
159 /* It is possible for the chunk to contain garbage at the end */
160
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 587 if (size > 0)
161 5 avio_skip(pb, size);
162
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 35 } else if (id == 0x0165 && size >= 32) {
163 int nb_streams, i;
164
165 ✗ size -= 4;
166 ✗ ret = ff_get_extradata(logctx, par, pb, size);
167 ✗ if (ret < 0)
168 ✗ return ret;
169 ✗ nb_streams = AV_RL16(par->extradata + 4);
170 ✗ par->sample_rate = AV_RL32(par->extradata + 12);
171 ✗ channels = 0;
172 ✗ bitrate = 0;
173 ✗ if (size < 8 + nb_streams * 20)
174 ✗ return AVERROR_INVALIDDATA;
175 ✗ for (i = 0; i < nb_streams; i++)
176 ✗ channels += par->extradata[8 + i * 20 + 17];
177 }
178
179 622 par->bit_rate = bitrate;
180
181
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 622 if (par->sample_rate <= 0) {
182 ✗ av_log(logctx, AV_LOG_ERROR,
183 "Invalid sample rate: %d\n", par->sample_rate);
184 ✗ return AVERROR_INVALIDDATA;
185 }
186
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 622 if (par->codec_id == AV_CODEC_ID_AAC_LATM) {
187 /* Channels and sample_rate values are those prior to applying SBR
188 * and/or PS. */
189 ✗ channels = 0;
190 ✗ par->sample_rate = 0;
191 }
192 /* override bits_per_coded_sample for G.726 */
193
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 622 if (par->codec_id == AV_CODEC_ID_ADPCM_G726 && par->sample_rate)
194 4 par->bits_per_coded_sample = par->bit_rate / par->sample_rate;
195
196 /* ignore WAVEFORMATEXTENSIBLE layout if different from channel count */
197
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 622 if (channels != par->ch_layout.nb_channels) {
198 611 av_channel_layout_uninit(&par->ch_layout);
199 611 par->ch_layout.order = AV_CHANNEL_ORDER_UNSPEC;
200 611 par->ch_layout.nb_channels = channels;
201 }
202
203 622 return 0;
204 }
205
206 624 enum AVCodecID ff_wav_codec_get_id(unsigned int tag, int bps)
207 {
208 enum AVCodecID id;
209 624 id = ff_codec_get_id(ff_codec_wav_tags, tag);
210
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 624 if (id <= 0)
211 1 return id;
212
213
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 623 if (id == AV_CODEC_ID_PCM_S16LE)
214 533 id = ff_get_pcm_codec_id(bps, 0, 0, ~1);
215
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 90 else if (id == AV_CODEC_ID_PCM_F32LE)
216 4 id = ff_get_pcm_codec_id(bps, 1, 0, 0);
217
218
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 623 if (id == AV_CODEC_ID_ADPCM_IMA_WAV && bps == 8)
219 ✗ id = AV_CODEC_ID_ADPCM_ZORK;
220 623 return id;
221 }
222
223 457 int ff_get_bmp_header(AVIOContext *pb, AVStream *st, uint32_t *size)
224 {
225 int tag1;
226 457 uint32_t size_ = avio_rl32(pb);
227
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 457 if (size)
228 453 *size = size_;
229 457 st->codecpar->width = avio_rl32(pb);
230 457 st->codecpar->height = (int32_t)avio_rl32(pb);
231 457 avio_rl16(pb); /* planes */
232 457 st->codecpar->bits_per_coded_sample = avio_rl16(pb); /* depth */
233 457 tag1 = avio_rl32(pb);
234 457 avio_rl32(pb); /* ImageSize */
235 457 avio_rl32(pb); /* XPelsPerMeter */
236 457 avio_rl32(pb); /* YPelsPerMeter */
237 457 avio_rl32(pb); /* ClrUsed */
238 457 avio_rl32(pb); /* ClrImportant */
239 457 return tag1;
240 }
241
242 80 int ff_read_riff_info(AVFormatContext *s, int64_t size)
243 {
244 int64_t start, end, cur;
245 80 AVIOContext *pb = s->pb;
246
247 80 start = avio_tell(pb);
248 80 end = start + size;
249
250
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 174 while ((cur = avio_tell(pb)) >= 0 &&
251
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 174 cur <= end - 8 /* = tag + size */) {
252 uint32_t chunk_code;
253 int64_t chunk_size;
254 94 char key[5] = { 0 };
255 char *value;
256
257 94 chunk_code = avio_rl32(pb);
258 94 chunk_size = avio_rl32(pb);
259
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 94 if (avio_feof(pb)) {
260 ✗ if (chunk_code || chunk_size) {
261 ✗ av_log(s, AV_LOG_WARNING, "INFO subchunk truncated\n");
262 ✗ return AVERROR_INVALIDDATA;
263 }
264 ✗ return AVERROR_EOF;
265 }
266
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 94 if (chunk_size > end ||
267
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 94 end - chunk_size < cur ||
268 chunk_size == UINT_MAX) {
269 ✗ avio_seek(pb, -9, SEEK_CUR);
270 ✗ chunk_code = avio_rl32(pb);
271 ✗ chunk_size = avio_rl32(pb);
272 ✗ if (chunk_size > end || end - chunk_size < cur || chunk_size == UINT_MAX) {
273 ✗ av_log(s, AV_LOG_WARNING, "too big INFO subchunk\n");
274 ✗ return AVERROR_INVALIDDATA;
275 }
276 }
277
278 94 chunk_size += (chunk_size & 1);
279
280
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 94 if (!chunk_code) {
281
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 2 if (chunk_size)
282 2 avio_skip(pb, chunk_size);
283 ✗ else if (pb->eof_reached) {
284 ✗ av_log(s, AV_LOG_WARNING, "truncated file\n");
285 ✗ return AVERROR_EOF;
286 }
287 2 continue;
288 }
289
290 92 value = av_mallocz(chunk_size + 1);
291
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 92 if (!value) {
292 ✗ av_log(s, AV_LOG_ERROR,
293 "out of memory, unable to read INFO tag\n");
294 ✗ return AVERROR(ENOMEM);
295 }
296
297 92 AV_WL32(key, chunk_code);
298 // Work around VC++ 2015 Update 1 code-gen bug:
299 // https://connect.microsoft.com/VisualStudio/feedback/details/2291638
300 92 key[4] = 0;
301
302
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 92 if (avio_read(pb, value, chunk_size) != chunk_size) {
303 ✗ av_log(s, AV_LOG_WARNING,
304 "premature end of file while reading INFO tag\n");
305 }
306
307 92 av_dict_set(&s->metadata, key, value, AV_DICT_DONT_STRDUP_VAL);
308 }
309
310 80 return 0;
311 }
312