cosmetics: indentation
[libav.git] / libavformat / aiff.c
1 /*
2 * AIFF/AIFF-C muxer and demuxer
3 * Copyright (c) 2006 Patrick Guimond
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 #include "avformat.h"
22 #include "allformats.h"
23 #include "riff.h"
24 #include "intfloat_readwrite.h"
25
26 static const AVCodecTag codec_aiff_tags[] = {
27 { CODEC_ID_PCM_S16BE, MKTAG('N','O','N','E') },
28 { CODEC_ID_PCM_S8, MKTAG('N','O','N','E') },
29 { CODEC_ID_PCM_S24BE, MKTAG('N','O','N','E') },
30 { CODEC_ID_PCM_S32BE, MKTAG('N','O','N','E') },
31 { CODEC_ID_PCM_ALAW, MKTAG('a','l','a','w') },
32 { CODEC_ID_PCM_ALAW, MKTAG('A','L','A','W') },
33 { CODEC_ID_PCM_MULAW, MKTAG('u','l','a','w') },
34 { CODEC_ID_PCM_MULAW, MKTAG('U','L','A','W') },
35 { CODEC_ID_MACE3, MKTAG('M','A','C','3') },
36 { CODEC_ID_MACE6, MKTAG('M','A','C','6') },
37 { CODEC_ID_GSM, MKTAG('G','S','M',' ') },
38 { CODEC_ID_ADPCM_G726, MKTAG('G','7','2','6') },
39 { CODEC_ID_PCM_S16LE, MKTAG('s','o','w','t') },
40 { 0, 0 },
41 };
42
43 #define AIFF 0
44 #define AIFF_C_VERSION1 0xA2805140
45
46 static int aiff_codec_get_id (int bps)
47 {
48 if (bps <= 8)
49 return CODEC_ID_PCM_S8;
50 if (bps <= 16)
51 return CODEC_ID_PCM_S16BE;
52 if (bps <= 24)
53 return CODEC_ID_PCM_S24BE;
54 if (bps <= 32)
55 return CODEC_ID_PCM_S32BE;
56
57 /* bigger than 32 isn't allowed */
58 return 0;
59 }
60
61 /* returns the size of the found tag */
62 static int get_tag(ByteIOContext *pb, uint32_t * tag)
63 {
64 int size;
65
66 if (url_feof(pb))
67 return AVERROR_IO;
68
69 *tag = get_le32(pb);
70 size = get_be32(pb);
71
72 if (size < 0)
73 size = 0x7fffffff;
74
75 return size;
76 }
77
78 /* Metadata string read */
79 static void get_meta(ByteIOContext *pb, char * str, int strsize, int size)
80 {
81 int res;
82
83 if (size > strsize-1)
84 res = get_buffer(pb, (uint8_t*)str, strsize-1);
85 else
86 res = get_buffer(pb, (uint8_t*)str, size);
87
88 if (res < 0)
89 return;
90
91 str[res] = 0;
92 if (size & 1)
93 size++;
94 size -= res;
95 if (size)
96 url_fskip(pb, size);
97 }
98
99 /* Returns the number of sound data frames or negative on error */
100 static unsigned int get_aiff_header(ByteIOContext *pb, AVCodecContext *codec,
101 int size, unsigned version)
102 {
103 AVExtFloat ext;
104 double sample_rate;
105 unsigned int num_frames;
106
107
108 if (size & 1)
109 size++;
110
111 codec->codec_type = CODEC_TYPE_AUDIO;
112 codec->channels = get_be16(pb);
113 num_frames = get_be32(pb);
114 codec->bits_per_sample = get_be16(pb);
115
116 get_buffer(pb, (uint8_t*)&ext, sizeof(ext));/* Sample rate is in */
117 sample_rate = av_ext2dbl(ext); /* 80 bits BE IEEE extended float */
118 codec->sample_rate = sample_rate;
119 size -= 18;
120
121 /* Got an AIFF-C? */
122 if (version == AIFF_C_VERSION1) {
123 codec->codec_tag = get_le32(pb);
124 codec->codec_id = codec_get_id (codec_aiff_tags, codec->codec_tag);
125
126 if (codec->codec_id == CODEC_ID_PCM_S16BE) {
127 codec->codec_id = aiff_codec_get_id (codec->bits_per_sample);
128 codec->bits_per_sample = av_get_bits_per_sample(codec->codec_id);
129 }
130
131 size -= 4;
132 } else {
133 /* Need the codec type */
134 codec->codec_id = aiff_codec_get_id (codec->bits_per_sample);
135 codec->bits_per_sample = av_get_bits_per_sample(codec->codec_id);
136 }
137
138 if (!codec->codec_id)
139 return AVERROR_INVALIDDATA;
140
141 /* Block align needs to be computed in all cases, as the definition
142 * is specific to applications -> here we use the WAVE format definition */
143 codec->block_align = (codec->bits_per_sample * codec->channels) >> 3;
144
145 codec->bit_rate = codec->sample_rate * (codec->block_align << 3);
146
147 /* Chunk is over */
148 if (size)
149 url_fseek(pb, size, SEEK_CUR);
150
151 return num_frames;
152 }
153
154 #ifdef CONFIG_MUXERS
155 typedef struct {
156 offset_t form;
157 offset_t frames;
158 offset_t ssnd;
159 } AIFFOutputContext;
160
161 static int aiff_write_header(AVFormatContext *s)
162 {
163 AIFFOutputContext *aiff = s->priv_data;
164 ByteIOContext *pb = &s->pb;
165 AVCodecContext *enc = s->streams[0]->codec;
166 AVExtFloat sample_rate;
167 int aifc = 0;
168
169 /* First verify if format is ok */
170 if (!enc->codec_tag) {
171 return -1;
172 }
173
174 if (enc->codec_tag != MKTAG('N','O','N','E'))
175 aifc = 1;
176
177 /* FORM AIFF header */
178 put_tag(pb, "FORM");
179 aiff->form = url_ftell(pb);
180 put_be32(pb, 0); /* file length */
181 put_tag(pb, aifc ? "AIFC" : "AIFF");
182
183 if (aifc) {
184 /* Version chunk */
185 put_tag(pb, "FVER");
186 put_be32(pb, 4);
187 put_be32(pb, 0xA2805140);
188 }
189
190 /* Common chunk */
191 put_tag(pb, "COMM");
192 put_be32(pb, aifc ? 24 : 18); /* size */
193 put_be16(pb, enc->channels); /* Number of channels */
194
195 aiff->frames = url_ftell(pb);
196 put_be32(pb, 0); /* Number of frames */
197
198 if (!enc->bits_per_sample)
199 enc->bits_per_sample = av_get_bits_per_sample(enc->codec_id);
200 if (!enc->bits_per_sample) {
201 av_log(s, AV_LOG_ERROR, "could not compute bits per sample\n");
202 return -1;
203 }
204 if (!enc->block_align)
205 enc->block_align = (enc->bits_per_sample * enc->channels) >> 3;
206
207 put_be16(pb, enc->bits_per_sample); /* Sample size */
208
209 sample_rate = av_dbl2ext((double)enc->sample_rate);
210 put_buffer(pb, (uint8_t*)&sample_rate, sizeof(sample_rate));
211
212 if (aifc) {
213 put_le32(pb, enc->codec_tag);
214 put_be16(pb, 0);
215 }
216
217 /* Sound data chunk */
218 put_tag(pb, "SSND");
219 aiff->ssnd = url_ftell(pb); /* Sound chunk size */
220 put_be32(pb, 0); /* Sound samples data size */
221 put_be32(pb, 0); /* Data offset */
222 put_be32(pb, 0); /* Block-size (block align) */
223
224 av_set_pts_info(s->streams[0], 64, 1, s->streams[0]->codec->sample_rate);
225
226 /* Data is starting here */
227 put_flush_packet(pb);
228
229 return 0;
230 }
231
232 static int aiff_write_packet(AVFormatContext *s, AVPacket *pkt)
233 {
234 ByteIOContext *pb = &s->pb;
235 put_buffer(pb, pkt->data, pkt->size);
236 return 0;
237 }
238
239 static int aiff_write_trailer(AVFormatContext *s)
240 {
241 ByteIOContext *pb = &s->pb;
242 AIFFOutputContext *aiff = s->priv_data;
243 AVCodecContext *enc = s->streams[0]->codec;
244
245 /* Chunks sizes must be even */
246 offset_t file_size, end_size;
247 end_size = file_size = url_ftell(pb);
248 if (file_size & 1) {
249 put_byte(pb, 0);
250 end_size++;
251 }
252
253 if (!url_is_streamed(&s->pb)) {
254 /* File length */
255 url_fseek(pb, aiff->form, SEEK_SET);
256 put_be32(pb, (uint32_t)(file_size - aiff->form - 4));
257
258 /* Number of sample frames */
259 url_fseek(pb, aiff->frames, SEEK_SET);
260 put_be32(pb, ((uint32_t)(file_size-aiff->ssnd-12))/enc->block_align);
261
262 /* Sound Data chunk size */
263 url_fseek(pb, aiff->ssnd, SEEK_SET);
264 put_be32(pb, (uint32_t)(file_size - aiff->ssnd - 4));
265
266 /* return to the end */
267 url_fseek(pb, end_size, SEEK_SET);
268
269 put_flush_packet(pb);
270 }
271
272 return 0;
273 }
274 #endif //CONFIG_MUXERS
275
276 static int aiff_probe(AVProbeData *p)
277 {
278 /* check file header */
279 if (p->buf[0] == 'F' && p->buf[1] == 'O' &&
280 p->buf[2] == 'R' && p->buf[3] == 'M' &&
281 p->buf[8] == 'A' && p->buf[9] == 'I' &&
282 p->buf[10] == 'F' && (p->buf[11] == 'F' || p->buf[11] == 'C'))
283 return AVPROBE_SCORE_MAX;
284 else
285 return 0;
286 }
287
288 /* aiff input */
289 static int aiff_read_header(AVFormatContext *s,
290 AVFormatParameters *ap)
291 {
292 int size, filesize;
293 offset_t offset = 0;
294 uint32_t tag;
295 unsigned version = AIFF_C_VERSION1;
296 ByteIOContext *pb = &s->pb;
297 AVStream * st = s->streams[0];
298
299 /* check FORM header */
300 filesize = get_tag(pb, &tag);
301 if (filesize < 0 || tag != MKTAG('F', 'O', 'R', 'M'))
302 return AVERROR_INVALIDDATA;
303
304 /* AIFF data type */
305 tag = get_le32(pb);
306 if (tag == MKTAG('A', 'I', 'F', 'F')) /* Got an AIFF file */
307 version = AIFF;
308 else if (tag != MKTAG('A', 'I', 'F', 'C')) /* An AIFF-C file then */
309 return AVERROR_INVALIDDATA;
310
311 filesize -= 4;
312
313 st = av_new_stream(s, 0);
314 if (!st)
315 return AVERROR_NOMEM;
316
317 while (filesize > 0) {
318 /* parse different chunks */
319 size = get_tag(pb, &tag);
320 if (size < 0)
321 return size;
322
323 filesize -= size + 8;
324
325 switch (tag) {
326 case MKTAG('C', 'O', 'M', 'M'): /* Common chunk */
327 /* Then for the complete header info */
328 st->nb_frames = get_aiff_header (pb, st->codec, size, version);
329 if (st->nb_frames < 0)
330 return st->nb_frames;
331 if (offset > 0) // COMM is after SSND
332 goto got_sound;
333 break;
334
335 case MKTAG('F', 'V', 'E', 'R'): /* Version chunk */
336 version = get_be32(pb);
337 break;
338
339 case MKTAG('N', 'A', 'M', 'E'): /* Sample name chunk */
340 get_meta (pb, s->title, sizeof(s->title), size);
341 break;
342
343 case MKTAG('A', 'U', 'T', 'H'): /* Author chunk */
344 get_meta (pb, s->author, sizeof(s->author), size);
345 break;
346
347 case MKTAG('(', 'c', ')', ' '): /* Copyright chunk */
348 get_meta (pb, s->copyright, sizeof(s->copyright), size);
349 break;
350
351 case MKTAG('A', 'N', 'N', 'O'): /* Annotation chunk */
352 get_meta (pb, s->comment, sizeof(s->comment), size);
353 break;
354
355 case MKTAG('S', 'S', 'N', 'D'): /* Sampled sound chunk */
356 offset = get_be32(pb); /* Offset of sound data */
357 get_be32(pb); /* BlockSize... don't care */
358 offset += url_ftell(pb); /* Compute absolute data offset */
359 if (st->codec->codec_id) /* Assume COMM already parsed */
360 goto got_sound;
361 if (url_is_streamed(pb)) {
362 av_log(s, AV_LOG_ERROR, "file is not seekable\n");
363 return -1;
364 }
365 url_fskip(pb, size - 8);
366 break;
367
368 default: /* Jump */
369 if (size & 1) /* Always even aligned */
370 size++;
371 url_fskip (pb, size);
372 }
373 }
374
375 /* End of loop and didn't get sound */
376 return AVERROR_INVALIDDATA;
377
378 got_sound:
379 /* Now positioned, get the sound data start and end */
380 if (st->nb_frames)
381 s->file_size = st->nb_frames * st->codec->block_align;
382
383 av_set_pts_info(st, 64, 1, st->codec->sample_rate);
384 st->start_time = 0;
385 st->duration = st->nb_frames;
386
387 /* Position the stream at the first block */
388 url_fseek(pb, offset, SEEK_SET);
389
390 return 0;
391 }
392
393 #define MAX_SIZE 4096
394
395 static int aiff_read_packet(AVFormatContext *s,
396 AVPacket *pkt)
397 {
398 AVStream *st = s->streams[0];
399 int res;
400
401 /* End of stream may be reached */
402 if (url_feof(&s->pb))
403 return AVERROR_IO;
404
405 /* Now for that packet */
406 res = av_get_packet(&s->pb, pkt, (MAX_SIZE / st->codec->block_align) * st->codec->block_align);
407 if (res < 0)
408 return res;
409
410 /* Only one stream in an AIFF file */
411 pkt->stream_index = 0;
412 return 0;
413 }
414
415 static int aiff_read_close(AVFormatContext *s)
416 {
417 return 0;
418 }
419
420 static int aiff_read_seek(AVFormatContext *s,
421 int stream_index, int64_t timestamp, int flags)
422 {
423 return pcm_read_seek(s, stream_index, timestamp, flags);
424 }
425
426 #ifdef CONFIG_AIFF_DEMUXER
427 AVInputFormat aiff_demuxer = {
428 "aiff",
429 "Audio IFF",
430 0,
431 aiff_probe,
432 aiff_read_header,
433 aiff_read_packet,
434 aiff_read_close,
435 aiff_read_seek,
436 .codec_tag= (const AVCodecTag*[]){codec_aiff_tags, 0},
437 };
438 #endif
439
440 #ifdef CONFIG_AIFF_MUXER
441 AVOutputFormat aiff_muxer = {
442 "aiff",
443 "Audio IFF",
444 "audio/aiff",
445 "aif,aiff,afc,aifc",
446 sizeof(AIFFOutputContext),
447 CODEC_ID_PCM_S16BE,
448 CODEC_ID_NONE,
449 aiff_write_header,
450 aiff_write_packet,
451 aiff_write_trailer,
452 .codec_tag= (const AVCodecTag*[]){codec_aiff_tags, 0},
453 };
454 #endif