FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/au.c
Date: 2025-10-24 21:16:34
Exec Total Coverage
Lines: 126 156 80.8%
Functions: 6 6 100.0%
Branches: 51 94 54.3%
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1 /*
2 * AU muxer and demuxer
3 * Copyright (c) 2001 Fabrice Bellard
4 *
5 * first version by Francois Revol <revol@free.fr>
6 *
7 * This file is part of FFmpeg.
8 *
9 * FFmpeg is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public
11 * License as published by the Free Software Foundation; either
12 * version 2.1 of the License, or (at your option) any later version.
13 *
14 * FFmpeg is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
18 *
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with FFmpeg; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 */
23
24 /*
25 * Reference documents:
26 * http://www.opengroup.org/public/pubs/external/auformat.html
27 * http://www.goice.co.jp/member/mo/formats/au.html
28 */
29
30 #include "config_components.h"
31
32 #include "libavutil/bprint.h"
33 #include "libavutil/intreadwrite.h"
34 #include "libavutil/mem.h"
35 #include "avformat.h"
36 #include "demux.h"
37 #include "internal.h"
38 #include "avio_internal.h"
39 #include "mux.h"
40 #include "pcm.h"
41 #include "libavutil/avassert.h"
42
43 /* if we don't know the size in advance */
44 #define AU_UNKNOWN_SIZE ((uint32_t)(~0))
45
46 static const AVCodecTag codec_au_tags[] = {
47 { AV_CODEC_ID_PCM_MULAW, 1 },
48 { AV_CODEC_ID_PCM_S8, 2 },
49 { AV_CODEC_ID_PCM_S16BE, 3 },
50 { AV_CODEC_ID_PCM_S24BE, 4 },
51 { AV_CODEC_ID_PCM_S32BE, 5 },
52 { AV_CODEC_ID_PCM_F32BE, 6 },
53 { AV_CODEC_ID_PCM_F64BE, 7 },
54 { AV_CODEC_ID_ADPCM_G726LE, 23 },
55 { AV_CODEC_ID_ADPCM_G722,24 },
56 { AV_CODEC_ID_ADPCM_G726LE, 25 },
57 { AV_CODEC_ID_ADPCM_G726LE, 26 },
58 { AV_CODEC_ID_PCM_ALAW, 27 },
59 { AV_CODEC_ID_ADPCM_G726LE, MKBETAG('7','2','6','2') },
60 { AV_CODEC_ID_NONE, 0 },
61 };
62
63 static const AVCodecTag *const au_codec_tags[] = { codec_au_tags, NULL };
64
65 #if CONFIG_AU_DEMUXER
66
67 7279 static int au_probe(const AVProbeData *p)
68 {
69
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 7279 if (p->buf_size < 24 ||
70
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 7279 AV_RL32(p->buf) != MKTAG('.', 's', 'n', 'd') ||
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 6 AV_RN32(p->buf+4) == 0 ||
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 6 AV_RN32(p->buf+8) == 0 ||
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 6 AV_RN32(p->buf+12) == 0 ||
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 6 AV_RN32(p->buf+16) == 0 ||
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 6 AV_RN32(p->buf+20) == 0)
76 7273 return 0;
77 6 return AVPROBE_SCORE_MAX;
78 }
79
80 6 static int au_read_annotation(AVFormatContext *s, int size)
81 {
82 static const char keys[][7] = {
83 "title",
84 "artist",
85 "album",
86 "track",
87 "genre",
88 };
89 6 AVIOContext *pb = s->pb;
90 6 enum { PARSE_KEY, PARSE_VALUE, PARSE_FINISHED } state = PARSE_KEY;
91 char c;
92 AVBPrint bprint;
93 6 char * key = NULL;
94 6 char * value = NULL;
95 int ret, i;
96
97 6 av_bprint_init(&bprint, 64, AV_BPRINT_SIZE_UNLIMITED);
98
99
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 70 while (size-- > 0) {
100
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 64 if (avio_feof(pb)) {
101 ✗ av_bprint_finalize(&bprint, NULL);
102 ✗ av_freep(&key);
103 ✗ return AVERROR_EOF;
104 }
105 64 c = avio_r8(pb);
106
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 64 switch(state) {
107 16 case PARSE_KEY:
108
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 16 if (c == '\0') {
109 4 state = PARSE_FINISHED;
110
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 12 } else if (c == '=') {
111 2 ret = av_bprint_finalize(&bprint, &key);
112
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 2 if (ret < 0)
113 ✗ return ret;
114 2 av_bprint_init(&bprint, 64, AV_BPRINT_SIZE_UNLIMITED);
115 2 state = PARSE_VALUE;
116 } else {
117 10 av_bprint_chars(&bprint, c, 1);
118 }
119 16 break;
120 18 case PARSE_VALUE:
121
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 18 if (c == '\0' || c == '\n') {
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 2 if (av_bprint_finalize(&bprint, &value) != 0) {
123 ✗ av_log(s, AV_LOG_ERROR, "Memory error while parsing AU metadata.\n");
124 } else {
125 2 av_bprint_init(&bprint, 64, AV_BPRINT_SIZE_UNLIMITED);
126
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 2 for (i = 0; i < FF_ARRAY_ELEMS(keys); i++) {
127
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 2 if (av_strcasecmp(keys[i], key) == 0) {
128 2 av_dict_set(&(s->metadata), keys[i], value, AV_DICT_DONT_STRDUP_VAL);
129 2 value = NULL;
130 2 break;
131 }
132 }
133 }
134 2 av_freep(&key);
135 2 av_freep(&value);
136
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 2 state = (c == '\0') ? PARSE_FINISHED : PARSE_KEY;
137 } else {
138 16 av_bprint_chars(&bprint, c, 1);
139 }
140 18 break;
141 30 case PARSE_FINISHED:
142 30 break;
143 ✗ default:
144 /* should never happen */
145 ✗ av_assert0(0);
146 }
147 }
148 6 av_bprint_finalize(&bprint, NULL);
149 6 av_freep(&key);
150 6 return 0;
151 }
152
153 #define BLOCK_SIZE 1024
154
155 6 static int au_read_header(AVFormatContext *s)
156 {
157 6 int size, data_size = 0;
158 unsigned int tag;
159 6 AVIOContext *pb = s->pb;
160 unsigned int id, channels, rate;
161 6 int bps, ba = 0;
162 enum AVCodecID codec;
163 AVStream *st;
164 int ret;
165
166 6 tag = avio_rl32(pb);
167
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 6 if (tag != MKTAG('.', 's', 'n', 'd'))
168 ✗ return AVERROR_INVALIDDATA;
169 6 size = avio_rb32(pb); /* header size */
170 6 data_size = avio_rb32(pb); /* data size in bytes */
171
172
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 6 if (data_size < 0 && data_size != AU_UNKNOWN_SIZE) {
173 ✗ av_log(s, AV_LOG_ERROR, "Invalid negative data size '%d' found\n", data_size);
174 ✗ return AVERROR_INVALIDDATA;
175 }
176
177 6 id = avio_rb32(pb);
178 6 rate = avio_rb32(pb);
179 6 channels = avio_rb32(pb);
180
181
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 6 if (size > 24) {
182 /* parse annotation field to get metadata */
183 6 ret = au_read_annotation(s, size - 24);
184
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 6 if (ret < 0)
185 ✗ return ret;
186 }
187
188 6 codec = ff_codec_get_id(codec_au_tags, id);
189
190
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 6 if (codec == AV_CODEC_ID_NONE) {
191 ✗ avpriv_request_sample(s, "unknown or unsupported codec tag: %u", id);
192 ✗ return AVERROR_PATCHWELCOME;
193 }
194
195 6 bps = av_get_bits_per_sample(codec);
196
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 6 if (codec == AV_CODEC_ID_ADPCM_G726LE) {
197 ✗ if (id == MKBETAG('7','2','6','2')) {
198 ✗ bps = 2;
199 } else {
200 ✗ const uint8_t bpcss[] = {4, 0, 3, 5};
201 ✗ av_assert0(id >= 23 && id < 23 + 4);
202 ✗ ba = bpcss[id - 23];
203 ✗ bps = bpcss[id - 23];
204 }
205
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 6 } else if (!bps) {
206 ✗ avpriv_request_sample(s, "Unknown bits per sample");
207 ✗ return AVERROR_PATCHWELCOME;
208 }
209
210
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 6 if (channels == 0 || channels >= INT_MAX / (BLOCK_SIZE * bps >> 3)) {
211 ✗ av_log(s, AV_LOG_ERROR, "Invalid number of channels %u\n", channels);
212 ✗ return AVERROR_INVALIDDATA;
213 }
214
215
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 6 if (rate == 0 || rate > INT_MAX) {
216 ✗ av_log(s, AV_LOG_ERROR, "Invalid sample rate: %u\n", rate);
217 ✗ return AVERROR_INVALIDDATA;
218 }
219
220 6 st = avformat_new_stream(s, NULL);
221
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 6 if (!st)
222 ✗ return AVERROR(ENOMEM);
223 6 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
224 6 st->codecpar->codec_tag = id;
225 6 st->codecpar->codec_id = codec;
226 6 st->codecpar->ch_layout.nb_channels = channels;
227 6 st->codecpar->sample_rate = rate;
228 6 st->codecpar->bits_per_coded_sample = bps;
229 6 st->codecpar->bit_rate = channels * rate * bps;
230
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 6 st->codecpar->block_align = ba ? ba : FFMAX(bps * channels / 8, 1);
231
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 6 if (data_size != AU_UNKNOWN_SIZE)
232 6 st->duration = (((int64_t)data_size)<<3) / (channels * (int64_t)bps);
233
234 6 st->start_time = 0;
235 6 avpriv_set_pts_info(st, 64, 1, rate);
236
237 6 return 0;
238 }
239
240 const FFInputFormat ff_au_demuxer = {
241 .p.name = "au",
242 .p.long_name = NULL_IF_CONFIG_SMALL("Sun AU"),
243 .p.codec_tag = au_codec_tags,
244 .read_probe = au_probe,
245 .read_header = au_read_header,
246 .read_packet = ff_pcm_read_packet,
247 .read_seek = ff_pcm_read_seek,
248 };
249
250 #endif /* CONFIG_AU_DEMUXER */
251
252 #if CONFIG_AU_MUXER
253
254 typedef struct AUContext {
255 uint32_t header_size;
256 } AUContext;
257
258 #include "rawenc.h"
259
260 3 static int au_get_annotations(AVFormatContext *s, AVBPrint *annotations)
261 {
262 static const char keys[][7] = {
263 "Title",
264 "Artist",
265 "Album",
266 "Track",
267 "Genre",
268 };
269 3 int cnt = 0;
270 3 AVDictionary *m = s->metadata;
271 3 AVDictionaryEntry *t = NULL;
272
273
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 18 for (int i = 0; i < FF_ARRAY_ELEMS(keys); i++) {
274 15 t = av_dict_get(m, keys[i], NULL, 0);
275
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 15 if (t != NULL) {
276
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 1 if (cnt++)
277 ✗ av_bprint_chars(annotations, '\n', 1);
278 1 av_bprintf(annotations, "%s=%s", keys[i], t->value);
279 }
280 }
281 /* The specification requires the annotation field to be zero-terminated
282 * and its length to be a multiple of eight, so pad with 0's */
283 3 av_bprint_chars(annotations, '\0', 8);
284
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 3 return av_bprint_is_complete(annotations) ? 0 : AVERROR(ENOMEM);
285 }
286
287 3 static int au_write_header(AVFormatContext *s)
288 {
289 int ret;
290 3 AUContext *au = s->priv_data;
291 3 AVIOContext *pb = s->pb;
292 3 AVCodecParameters *par = s->streams[0]->codecpar;
293 AVBPrint annotations;
294
295 3 par->codec_tag = ff_codec_get_tag(codec_au_tags, par->codec_id);
296
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 3 if (!par->codec_tag) {
297 ✗ av_log(s, AV_LOG_ERROR, "unsupported codec\n");
298 ✗ return AVERROR(EINVAL);
299 }
300
301 3 av_bprint_init(&annotations, 0, INT_MAX - 24);
302 3 ret = au_get_annotations(s, &annotations);
303
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 3 if (ret < 0)
304 ✗ goto fail;
305 3 au->header_size = 24 + annotations.len & ~7;
306
307 3 ffio_wfourcc(pb, ".snd"); /* magic number */
308 3 avio_wb32(pb, au->header_size); /* header size */
309 3 avio_wb32(pb, AU_UNKNOWN_SIZE); /* data size */
310 3 avio_wb32(pb, par->codec_tag); /* codec ID */
311 3 avio_wb32(pb, par->sample_rate);
312 3 avio_wb32(pb, par->ch_layout.nb_channels);
313 3 avio_write(pb, annotations.str, annotations.len & ~7);
314
315 3 fail:
316 3 av_bprint_finalize(&annotations, NULL);
317
318 3 return ret;
319 }
320
321 3 static int au_write_trailer(AVFormatContext *s)
322 {
323 3 AVIOContext *pb = s->pb;
324 3 AUContext *au = s->priv_data;
325 3 int64_t file_size = avio_tell(pb);
326
327
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 3 if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && file_size < INT32_MAX) {
328 /* update file size */
329 3 avio_seek(pb, 8, SEEK_SET);
330 3 avio_wb32(pb, (uint32_t)(file_size - au->header_size));
331 3 avio_seek(pb, file_size, SEEK_SET);
332 }
333
334 3 return 0;
335 }
336
337 const FFOutputFormat ff_au_muxer = {
338 .p.name = "au",
339 .p.long_name = NULL_IF_CONFIG_SMALL("Sun AU"),
340 .p.mime_type = "audio/basic",
341 .p.extensions = "au",
342 .p.codec_tag = au_codec_tags,
343 .p.audio_codec = AV_CODEC_ID_PCM_S16BE,
344 .p.video_codec = AV_CODEC_ID_NONE,
345 .p.subtitle_codec = AV_CODEC_ID_NONE,
346 .p.flags = AVFMT_NOTIMESTAMPS,
347 .flags_internal = FF_OFMT_FLAG_MAX_ONE_OF_EACH,
348 .priv_data_size = sizeof(AUContext),
349 .write_header = au_write_header,
350 .write_packet = ff_raw_write_packet,
351 .write_trailer = au_write_trailer,
352 };
353
354 #endif /* CONFIG_AU_MUXER */
355