FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavformat/riffdec.c
Date: 2022-11-26 13:19:19
Exec Total Coverage
Lines: 120 169 71.0%
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 2255 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 2255 ret = ffio_read_size(s, *g, sizeof(*g));
37
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2255 if (ret < 0) {
38 10 memset(*g, 0, sizeof(*g));
39 10 return ret;
40 }
41 2245 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 18 static void parse_waveformatex(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par)
62 {
63 ff_asf_guid subformat;
64 int bps;
65 uint64_t mask;
66
67 18 bps = avio_rl16(pb);
68
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18 if (bps)
69 18 par->bits_per_coded_sample = bps;
70
71 18 mask = avio_rl32(pb); /* dwChannelMask */
72 18 av_channel_layout_from_mask(&par->ch_layout, mask);
73
74 18 ff_get_guid(pb, &subformat);
75 18 if (!memcmp(subformat + 4,
76
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18 (const uint8_t[]){ FF_AMBISONIC_BASE_GUID }, 12) ||
77 18 !memcmp(subformat + 4,
78
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18 (const uint8_t[]){ FF_BROKEN_BASE_GUID }, 12) ||
79 18 !memcmp(subformat + 4,
80
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18 (const uint8_t[]){ FF_MEDIASUBTYPE_BASE_GUID }, 12)) {
81 18 par->codec_tag = AV_RL32(subformat);
82 18 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(s, AV_LOG_WARNING,
88 "unknown subformat:"FF_PRI_GUID"\n",
89 FF_ARG_GUID(subformat));
90 }
91 18 }
92
93 /* "big_endian" values are needed for RIFX file format */
94 618 int ff_get_wav_header(AVFormatContext *s, AVIOContext *pb,
95 AVCodecParameters *par, int size, int big_endian)
96 {
97 618 int id, channels = 0;
98 618 uint64_t bitrate = 0;
99
100
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618 if (size < 14) {
101 avpriv_request_sample(s, "wav header size < 14");
102 return AVERROR_INVALIDDATA;
103 }
104
105 618 av_channel_layout_uninit(&par->ch_layout);
106
107 618 par->codec_type = AVMEDIA_TYPE_AUDIO;
108
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618 if (!big_endian) {
109 618 id = avio_rl16(pb);
110
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618 if (id != 0x0165) {
111 618 channels = avio_rl16(pb);
112 618 par->sample_rate = avio_rl32(pb);
113 618 bitrate = avio_rl32(pb) * 8LL;
114 618 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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618 if (size == 14) { /* We're dealing with plain vanilla WAVEFORMAT */
124 par->bits_per_coded_sample = 8;
125 } else {
126
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618 if (!big_endian) {
127 618 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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618 if (id == 0xFFFE) {
133 18 par->codec_tag = 0;
134 } else {
135 600 par->codec_tag = id;
136 600 par->codec_id = ff_wav_codec_get_id(id,
137 par->bits_per_coded_sample);
138 }
139
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1201 if (size >= 18 && id != 0x0165) { /* We're obviously dealing with WAVEFORMATEX */
140 583 int cbSize = avio_rl16(pb); /* cbSize */
141
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583 if (big_endian) {
142 avpriv_report_missing_feature(s, "WAVEFORMATEX support for RIFX files");
143 return AVERROR_PATCHWELCOME;
144 }
145 583 size -= 18;
146 583 cbSize = FFMIN(size, cbSize);
147
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583 if (cbSize >= 22 && id == 0xfffe) { /* WAVEFORMATEXTENSIBLE */
148 18 parse_waveformatex(s, pb, par);
149 18 cbSize -= 22;
150 18 size -= 22;
151 }
152
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583 if (cbSize > 0) {
153
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67 if (ff_get_extradata(s, par, pb, cbSize) < 0)
154 return AVERROR(ENOMEM);
155 67 size -= cbSize;
156 }
157
158 /* It is possible for the chunk to contain garbage at the end */
159
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583 if (size > 0)
160 5 avio_skip(pb, size);
161
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35 } else if (id == 0x0165 && size >= 32) {
162 int nb_streams, i;
163
164 size -= 4;
165 if (ff_get_extradata(s, par, pb, size) < 0)
166 return AVERROR(ENOMEM);
167 nb_streams = AV_RL16(par->extradata + 4);
168 par->sample_rate = AV_RL32(par->extradata + 12);
169 channels = 0;
170 bitrate = 0;
171 if (size < 8 + nb_streams * 20)
172 return AVERROR_INVALIDDATA;
173 for (i = 0; i < nb_streams; i++)
174 channels += par->extradata[8 + i * 20 + 17];
175 }
176
177 618 par->bit_rate = bitrate;
178
179
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618 if (par->sample_rate <= 0) {
180 av_log(s, AV_LOG_ERROR,
181 "Invalid sample rate: %d\n", par->sample_rate);
182 return AVERROR_INVALIDDATA;
183 }
184
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618 if (par->codec_id == AV_CODEC_ID_AAC_LATM) {
185 /* Channels and sample_rate values are those prior to applying SBR
186 * and/or PS. */
187 channels = 0;
188 par->sample_rate = 0;
189 }
190 /* override bits_per_coded_sample for G.726 */
191
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618 if (par->codec_id == AV_CODEC_ID_ADPCM_G726 && par->sample_rate)
192 4 par->bits_per_coded_sample = par->bit_rate / par->sample_rate;
193
194 /* ignore WAVEFORMATEXTENSIBLE layout if different from channel count */
195
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618 if (channels != par->ch_layout.nb_channels) {
196 608 av_channel_layout_uninit(&par->ch_layout);
197 608 par->ch_layout.order = AV_CHANNEL_ORDER_UNSPEC;
198 608 par->ch_layout.nb_channels = channels;
199 }
200
201 618 return 0;
202 }
203
204 620 enum AVCodecID ff_wav_codec_get_id(unsigned int tag, int bps)
205 {
206 enum AVCodecID id;
207 620 id = ff_codec_get_id(ff_codec_wav_tags, tag);
208
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620 if (id <= 0)
209 1 return id;
210
211
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619 if (id == AV_CODEC_ID_PCM_S16LE)
212 529 id = ff_get_pcm_codec_id(bps, 0, 0, ~1);
213
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90 else if (id == AV_CODEC_ID_PCM_F32LE)
214 4 id = ff_get_pcm_codec_id(bps, 1, 0, 0);
215
216
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619 if (id == AV_CODEC_ID_ADPCM_IMA_WAV && bps == 8)
217 id = AV_CODEC_ID_ADPCM_ZORK;
218 619 return id;
219 }
220
221 445 int ff_get_bmp_header(AVIOContext *pb, AVStream *st, uint32_t *size)
222 {
223 int tag1;
224 445 uint32_t size_ = avio_rl32(pb);
225
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445 if (size)
226 441 *size = size_;
227 445 st->codecpar->width = avio_rl32(pb);
228 445 st->codecpar->height = (int32_t)avio_rl32(pb);
229 445 avio_rl16(pb); /* planes */
230 445 st->codecpar->bits_per_coded_sample = avio_rl16(pb); /* depth */
231 445 tag1 = avio_rl32(pb);
232 445 avio_rl32(pb); /* ImageSize */
233 445 avio_rl32(pb); /* XPelsPerMeter */
234 445 avio_rl32(pb); /* YPelsPerMeter */
235 445 avio_rl32(pb); /* ClrUsed */
236 445 avio_rl32(pb); /* ClrImportant */
237 445 return tag1;
238 }
239
240 79 int ff_read_riff_info(AVFormatContext *s, int64_t size)
241 {
242 int64_t start, end, cur;
243 79 AVIOContext *pb = s->pb;
244
245 79 start = avio_tell(pb);
246 79 end = start + size;
247
248
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172 while ((cur = avio_tell(pb)) >= 0 &&
249
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172 cur <= end - 8 /* = tag + size */) {
250 uint32_t chunk_code;
251 int64_t chunk_size;
252 93 char key[5] = { 0 };
253 char *value;
254
255 93 chunk_code = avio_rl32(pb);
256 93 chunk_size = avio_rl32(pb);
257
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93 if (avio_feof(pb)) {
258 if (chunk_code || chunk_size) {
259 av_log(s, AV_LOG_WARNING, "INFO subchunk truncated\n");
260 return AVERROR_INVALIDDATA;
261 }
262 return AVERROR_EOF;
263 }
264
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93 if (chunk_size > end ||
265
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93 end - chunk_size < cur ||
266 chunk_size == UINT_MAX) {
267 avio_seek(pb, -9, SEEK_CUR);
268 chunk_code = avio_rl32(pb);
269 chunk_size = avio_rl32(pb);
270 if (chunk_size > end || end - chunk_size < cur || chunk_size == UINT_MAX) {
271 av_log(s, AV_LOG_WARNING, "too big INFO subchunk\n");
272 return AVERROR_INVALIDDATA;
273 }
274 }
275
276 93 chunk_size += (chunk_size & 1);
277
278
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93 if (!chunk_code) {
279
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2 if (chunk_size)
280 2 avio_skip(pb, chunk_size);
281 else if (pb->eof_reached) {
282 av_log(s, AV_LOG_WARNING, "truncated file\n");
283 return AVERROR_EOF;
284 }
285 2 continue;
286 }
287
288 91 value = av_mallocz(chunk_size + 1);
289
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91 if (!value) {
290 av_log(s, AV_LOG_ERROR,
291 "out of memory, unable to read INFO tag\n");
292 return AVERROR(ENOMEM);
293 }
294
295 91 AV_WL32(key, chunk_code);
296 // Work around VC++ 2015 Update 1 code-gen bug:
297 // https://connect.microsoft.com/VisualStudio/feedback/details/2291638
298 91 key[4] = 0;
299
300
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91 if (avio_read(pb, value, chunk_size) != chunk_size) {
301 av_log(s, AV_LOG_WARNING,
302 "premature end of file while reading INFO tag\n");
303 }
304
305 91 av_dict_set(&s->metadata, key, value, AV_DICT_DONT_STRDUP_VAL);
306 }
307
308 79 return 0;
309 }
310