make some symbols static
[libav.git] / libavformat / aiff.c
CommitLineData
f11288da 1/*
7fbde343 2 * AIFF/AIFF-C muxer and demuxer
f11288da
MN
3 * Copyright (c) 2006 Patrick Guimond
4 *
b78e7197
DB
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
f11288da
MN
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
b78e7197 10 * version 2.1 of the License, or (at your option) any later version.
f11288da 11 *
b78e7197 12 * FFmpeg is distributed in the hope that it will be useful,
f11288da
MN
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
b78e7197 18 * License along with FFmpeg; if not, write to the Free Software
f11288da
MN
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21#include "avformat.h"
e006c307 22#include "allformats.h"
9d9f4119 23#include "riff.h"
f11288da
MN
24#include "intfloat_readwrite.h"
25
1ed1a122 26static const CodecTag codec_aiff_tags[] = {
f11288da
MN
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 { 0, 0 },
40};
41
42#define AIFF 0
43#define AIFF_C_VERSION1 0xA2805140
44
45static int aiff_codec_get_id (int bps)
46{
47 if (bps <= 8)
48 return CODEC_ID_PCM_S8;
49 if (bps <= 16)
50 return CODEC_ID_PCM_S16BE;
51 if (bps <= 24)
52 return CODEC_ID_PCM_S24BE;
53 if (bps <= 32)
54 return CODEC_ID_PCM_S32BE;
55
56 /* bigger than 32 isn't allowed */
57 return 0;
58}
59
60/* returns the size of the found tag */
61static int get_tag(ByteIOContext *pb, uint32_t * tag)
62{
63 int size;
64
65 if (url_feof(pb))
66 return AVERROR_IO;
67
68 *tag = get_le32(pb);
69 size = get_be32(pb);
70
71 if (size < 0)
72 size = 0x7fffffff;
73
74 return size;
75}
76
77/* Metadata string read */
78static void get_meta(ByteIOContext *pb, char * str, int strsize, int size)
79{
80 int res;
81
82 if (size > strsize-1)
83 res = get_buffer(pb, (uint8_t*)str, strsize-1);
84 else
85 res = get_buffer(pb, (uint8_t*)str, size);
86
87 if (res < 0)
88 return;
89
90 str[res] = 0;
91 if (size & 1)
92 size++;
93 size -= res;
94 if (size);
95 url_fskip(pb, size);
96}
97
f11288da 98/* Returns the number of sound data frames or negative on error */
7b49ce2e 99static unsigned int get_aiff_header(ByteIOContext *pb, AVCodecContext *codec,
f11288da
MN
100 int size, unsigned version)
101{
102 AVExtFloat ext;
103 double sample_rate;
104 unsigned int num_frames;
105
106
107 if (size & 1)
108 size++;
109
110 codec->codec_type = CODEC_TYPE_AUDIO;
111 codec->channels = get_be16(pb);
112 num_frames = get_be32(pb);
113 codec->bits_per_sample = get_be16(pb);
114
115 get_buffer(pb, (uint8_t*)&ext, sizeof(ext));/* Sample rate is in */
116 sample_rate = av_ext2dbl(ext); /* 80 bits BE IEEE extended float */
117 codec->sample_rate = sample_rate;
118 size -= 18;
119
120 /* Got an AIFF-C? */
121 if (version == AIFF_C_VERSION1) {
122 codec->codec_tag = get_le32(pb);
123 codec->codec_id = codec_get_id (codec_aiff_tags, codec->codec_tag);
124
125 if (codec->codec_id == CODEC_ID_PCM_S16BE) {
126 codec->codec_id = aiff_codec_get_id (codec->bits_per_sample);
d50756cd 127 codec->bits_per_sample = av_get_bits_per_sample(codec->codec_id);
f11288da
MN
128 }
129
130 size -= 4;
131 } else {
132 /* Need the codec type */
133 codec->codec_id = aiff_codec_get_id (codec->bits_per_sample);
d50756cd 134 codec->bits_per_sample = av_get_bits_per_sample(codec->codec_id);
f11288da
MN
135 }
136
137 if (!codec->codec_id)
138 return AVERROR_INVALIDDATA;
139
140 /* Block align needs to be computed in all cases, as the definition
141 * is specific to applications -> here we use the WAVE format definition */
142 codec->block_align = (codec->bits_per_sample * codec->channels) >> 3;
143
777f4649 144 codec->bit_rate = codec->sample_rate * (codec->block_align << 3);
f11288da
MN
145
146 /* Chunk is over */
147 if (size)
148 url_fseek(pb, size, SEEK_CUR);
149
150 return num_frames;
151}
152
153#ifdef CONFIG_MUXERS
154typedef struct {
155 offset_t form;
156 offset_t frames;
157 offset_t ssnd;
158} AIFFOutputContext;
159
160static int aiff_write_header(AVFormatContext *s)
161{
162 AIFFOutputContext *aiff = s->priv_data;
163 ByteIOContext *pb = &s->pb;
164 AVCodecContext *enc = s->streams[0]->codec;
165 AVExtFloat sample_rate;
f11288da
MN
166
167 /* First verify if format is ok */
168 enc->codec_tag = codec_get_tag(codec_aiff_tags, enc->codec_id);
169 if (!enc->codec_tag) {
170 av_free(aiff);
171 return -1;
172 }
173
f11288da
MN
174 /* FORM AIFF header */
175 put_tag(pb, "FORM");
176 aiff->form = url_ftell(pb);
177 put_be32(pb, 0); /* file length */
178 put_tag(pb, "AIFC");
179
180 /* Version chunk */
181 put_tag(pb, "FVER");
182 put_be32(pb, 4);
183 put_be32(pb, 0xA2805140);
184
185 /* Common chunk */
186 put_tag(pb, "COMM");
8d41fe28 187 put_be32(pb, 24); /* size */
f11288da
MN
188 put_be16(pb, enc->channels); /* Number of channels */
189
190 aiff->frames = url_ftell(pb);
191 put_be32(pb, 0); /* Number of frames */
192
193 if (!enc->bits_per_sample)
e27d9277
BC
194 enc->bits_per_sample = av_get_bits_per_sample(enc->codec_id);
195 if (!enc->bits_per_sample) {
196 av_log(s, AV_LOG_ERROR, "could not compute bits per sample\n");
197 return -1;
198 }
199 if (!enc->block_align)
200 enc->block_align = (enc->bits_per_sample * enc->channels) >> 3;
201
f11288da
MN
202 put_be16(pb, enc->bits_per_sample); /* Sample size */
203
204 sample_rate = av_dbl2ext((double)enc->sample_rate);
205 put_buffer(pb, (uint8_t*)&sample_rate, sizeof(sample_rate));
206
207 put_le32(pb, enc->codec_tag);
8d41fe28 208 put_be16(pb, 0);
f11288da
MN
209
210 /* Sound data chunk */
211 put_tag(pb, "SSND");
212 aiff->ssnd = url_ftell(pb); /* Sound chunk size */
213 put_be32(pb, 0); /* Sound samples data size */
214 put_be32(pb, 0); /* Data offset */
215 put_be32(pb, 0); /* Block-size (block align) */
216
217 av_set_pts_info(s->streams[0], 64, 1, s->streams[0]->codec->sample_rate);
218
219 /* Data is starting here */
220 put_flush_packet(pb);
221
222 return 0;
223}
224
225static int aiff_write_packet(AVFormatContext *s, AVPacket *pkt)
226{
227 ByteIOContext *pb = &s->pb;
228 put_buffer(pb, pkt->data, pkt->size);
229 return 0;
230}
231
232static int aiff_write_trailer(AVFormatContext *s)
233{
234 ByteIOContext *pb = &s->pb;
235 AIFFOutputContext *aiff = s->priv_data;
236 AVCodecContext *enc = s->streams[0]->codec;
237
238 /* Chunks sizes must be even */
239 offset_t file_size, end_size;
240 end_size = file_size = url_ftell(pb);
241 if (file_size & 1) {
242 put_byte(pb, 0);
243 end_size++;
244 }
245
246 if (!url_is_streamed(&s->pb)) {
247 /* File length */
248 url_fseek(pb, aiff->form, SEEK_SET);
249 put_be32(pb, (uint32_t)(file_size - aiff->form - 4));
250
251 /* Number of sample frames */
252 url_fseek(pb, aiff->frames, SEEK_SET);
253 put_be32(pb, ((uint32_t)(file_size-aiff->ssnd-12))/enc->block_align);
254
255 /* Sound Data chunk size */
256 url_fseek(pb, aiff->ssnd, SEEK_SET);
257 put_be32(pb, (uint32_t)(file_size - aiff->ssnd - 4));
258
259 /* return to the end */
260 url_fseek(pb, end_size, SEEK_SET);
261
262 put_flush_packet(pb);
263 }
264
265 return 0;
266}
267#endif //CONFIG_MUXERS
268
269static int aiff_probe(AVProbeData *p)
270{
271 /* check file header */
272 if (p->buf_size < 16)
273 return 0;
274 if (p->buf[0] == 'F' && p->buf[1] == 'O' &&
275 p->buf[2] == 'R' && p->buf[3] == 'M' &&
276 p->buf[8] == 'A' && p->buf[9] == 'I' &&
277 p->buf[10] == 'F' && (p->buf[11] == 'F' || p->buf[11] == 'C'))
278 return AVPROBE_SCORE_MAX;
279 else
280 return 0;
281}
282
283/* aiff input */
284static int aiff_read_header(AVFormatContext *s,
285 AVFormatParameters *ap)
286{
287 int size, filesize, offset;
288 uint32_t tag;
289 unsigned version = AIFF_C_VERSION1;
290 ByteIOContext *pb = &s->pb;
291 AVStream * st = s->streams[0];
292
293 /* check FORM header */
294 filesize = get_tag(pb, &tag);
295 if (filesize < 0 || tag != MKTAG('F', 'O', 'R', 'M'))
296 return AVERROR_INVALIDDATA;
297
298 /* AIFF data type */
299 tag = get_le32(pb);
300 if (tag == MKTAG('A', 'I', 'F', 'F')) /* Got an AIFF file */
301 version = AIFF;
302 else if (tag != MKTAG('A', 'I', 'F', 'C')) /* An AIFF-C file then */
303 return AVERROR_INVALIDDATA;
304
305 filesize -= 4;
306
307 st = av_new_stream(s, 0);
308 if (!st)
309 return AVERROR_NOMEM;
310
311 while (filesize > 0) {
312 /* parse different chunks */
313 size = get_tag(pb, &tag);
314 if (size < 0)
315 return size;
316
317 filesize -= size + 8;
318
319 switch (tag) {
320 case MKTAG('C', 'O', 'M', 'M'): /* Common chunk */
321 /* Then for the complete header info */
322 st->nb_frames = get_aiff_header (pb, st->codec, size, version);
323 if (st->nb_frames < 0)
324 return st->nb_frames;
325 break;
326
327 case MKTAG('F', 'V', 'E', 'R'): /* Version chunk */
328 version = get_be32(pb);
329 break;
330
331 case MKTAG('N', 'A', 'M', 'E'): /* Sample name chunk */
332 get_meta (pb, s->title, sizeof(s->title), size);
333 break;
334
335 case MKTAG('A', 'U', 'T', 'H'): /* Author chunk */
336 get_meta (pb, s->author, sizeof(s->author), size);
337 break;
338
339 case MKTAG('(', 'c', ')', ' '): /* Copyright chunk */
340 get_meta (pb, s->copyright, sizeof(s->copyright), size);
341 break;
342
343 case MKTAG('A', 'N', 'N', 'O'): /* Annotation chunk */
344 get_meta (pb, s->comment, sizeof(s->comment), size);
345 break;
346
347 case MKTAG('S', 'S', 'N', 'D'): /* Sampled sound chunk */
348 get_be32(pb); /* Block align... don't care */
349 offset = get_be32(pb); /* Offset of sound data */
350 goto got_sound;
351
352 default: /* Jump */
353 if (size & 1) /* Always even aligned */
354 size++;
355 url_fskip (pb, size);
356 }
357 }
358
359 /* End of loop and didn't get sound */
360 return AVERROR_INVALIDDATA;
361
362got_sound:
363 /* Now positioned, get the sound data start and end */
364 if (st->nb_frames)
365 s->file_size = st->nb_frames * st->codec->block_align;
366
367 av_set_pts_info(st, 64, 1, st->codec->sample_rate);
368 st->start_time = 0;
369 st->duration = st->nb_frames;
370
371 /* Position the stream at the first block */
372 url_fskip(pb, offset);
373
374 return 0;
375}
376
377#define MAX_SIZE 4096
378
379static int aiff_read_packet(AVFormatContext *s,
380 AVPacket *pkt)
381{
a959f0ea
BC
382 AVStream *st = s->streams[0];
383 int res;
f11288da
MN
384
385 /* End of stream may be reached */
386 if (url_feof(&s->pb))
387 return AVERROR_IO;
388
f11288da 389 /* Now for that packet */
a959f0ea 390 res = av_get_packet(&s->pb, pkt, (MAX_SIZE / st->codec->block_align) * st->codec->block_align);
f11288da
MN
391 if (res < 0)
392 return res;
393
394 /* Only one stream in an AIFF file */
395 pkt->stream_index = 0;
f11288da
MN
396 return 0;
397}
398
399static int aiff_read_close(AVFormatContext *s)
400{
401 return 0;
402}
403
404static int aiff_read_seek(AVFormatContext *s,
405 int stream_index, int64_t timestamp, int flags)
406{
407 return pcm_read_seek(s, stream_index, timestamp, flags);
408}
409
ff70e601
MR
410#ifdef CONFIG_AIFF_DEMUXER
411AVInputFormat aiff_demuxer = {
f11288da
MN
412 "aiff",
413 "Audio IFF",
414 0,
415 aiff_probe,
416 aiff_read_header,
417 aiff_read_packet,
418 aiff_read_close,
419 aiff_read_seek,
420};
ff70e601 421#endif
f11288da 422
8a85f46d 423#ifdef CONFIG_AIFF_MUXER
ff70e601 424AVOutputFormat aiff_muxer = {
f11288da
MN
425 "aiff",
426 "Audio IFF",
427 "audio/aiff",
428 "aif,aiff,afc,aifc",
429 sizeof(AIFFOutputContext),
430 CODEC_ID_PCM_S16BE,
431 CODEC_ID_NONE,
432 aiff_write_header,
433 aiff_write_packet,
434 aiff_write_trailer,
435};
ff70e601 436#endif