Return special EOF checking for aiff and au demuxers, the check was at
[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
22 #include "libavutil/intfloat_readwrite.h"
23 #include "avformat.h"
24 #include "raw.h"
25 #include "riff.h"
26
27 static const AVCodecTag codec_aiff_tags[] = {
28 { CODEC_ID_PCM_S16BE, MKTAG('N','O','N','E') },
29 { CODEC_ID_PCM_S8, MKTAG('N','O','N','E') },
30 { CODEC_ID_PCM_S24BE, MKTAG('N','O','N','E') },
31 { CODEC_ID_PCM_S32BE, MKTAG('N','O','N','E') },
32 { CODEC_ID_PCM_F32BE, MKTAG('f','l','3','2') },
33 { CODEC_ID_PCM_F64BE, MKTAG('f','l','6','4') },
34 { CODEC_ID_PCM_ALAW, MKTAG('a','l','a','w') },
35 { CODEC_ID_PCM_MULAW, MKTAG('u','l','a','w') },
36 { CODEC_ID_MACE3, MKTAG('M','A','C','3') },
37 { CODEC_ID_MACE6, MKTAG('M','A','C','6') },
38 { CODEC_ID_GSM, MKTAG('G','S','M',' ') },
39 { CODEC_ID_ADPCM_G726, MKTAG('G','7','2','6') },
40 { CODEC_ID_PCM_S16LE, MKTAG('s','o','w','t') },
41 { CODEC_ID_ADPCM_IMA_QT, MKTAG('i','m','a','4') },
42 { CODEC_ID_QDM2, MKTAG('Q','D','M','2') },
43 { 0, 0 },
44 };
45
46 #define AIFF 0
47 #define AIFF_C_VERSION1 0xA2805140
48
49 static enum CodecID aiff_codec_get_id(int bps)
50 {
51 if (bps <= 8)
52 return CODEC_ID_PCM_S8;
53 if (bps <= 16)
54 return CODEC_ID_PCM_S16BE;
55 if (bps <= 24)
56 return CODEC_ID_PCM_S24BE;
57 if (bps <= 32)
58 return CODEC_ID_PCM_S32BE;
59
60 /* bigger than 32 isn't allowed */
61 return CODEC_ID_NONE;
62 }
63
64 /* returns the size of the found tag */
65 static int get_tag(ByteIOContext *pb, uint32_t * tag)
66 {
67 int size;
68
69 if (url_feof(pb))
70 return AVERROR(EIO);
71
72 *tag = get_le32(pb);
73 size = get_be32(pb);
74
75 if (size < 0)
76 size = 0x7fffffff;
77
78 return size;
79 }
80
81 /* Metadata string read */
82 static void get_meta(AVFormatContext *s, const char *key, int size)
83 {
84 uint8_t str[1024];
85 int res = get_buffer(s->pb, str, FFMIN(sizeof(str)-1, size));
86 if (res < 0)
87 return;
88
89 str[res] = 0;
90 if (size & 1)
91 size++;
92 size -= res;
93 if (size)
94 url_fskip(s->pb, size);
95
96 av_metadata_set(&s->metadata, key, str);
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 if (size & 1)
108 size++;
109 codec->codec_type = CODEC_TYPE_AUDIO;
110 codec->channels = get_be16(pb);
111 num_frames = get_be32(pb);
112 codec->bits_per_coded_sample = get_be16(pb);
113
114 get_buffer(pb, (uint8_t*)&ext, sizeof(ext));/* Sample rate is in */
115 sample_rate = av_ext2dbl(ext); /* 80 bits BE IEEE extended float */
116 codec->sample_rate = sample_rate;
117 size -= 18;
118
119 /* Got an AIFF-C? */
120 if (version == AIFF_C_VERSION1) {
121 codec->codec_tag = get_le32(pb);
122 codec->codec_id = ff_codec_get_id(codec_aiff_tags, codec->codec_tag);
123
124 switch (codec->codec_id) {
125 case CODEC_ID_PCM_S16BE:
126 codec->codec_id = aiff_codec_get_id(codec->bits_per_coded_sample);
127 codec->bits_per_coded_sample = av_get_bits_per_sample(codec->codec_id);
128 break;
129 case CODEC_ID_ADPCM_IMA_QT:
130 codec->block_align = 34*codec->channels;
131 codec->frame_size = 64;
132 break;
133 case CODEC_ID_MACE3:
134 codec->block_align = 2*codec->channels;
135 codec->frame_size = 6;
136 break;
137 case CODEC_ID_MACE6:
138 codec->block_align = 1*codec->channels;
139 codec->frame_size = 6;
140 break;
141 case CODEC_ID_GSM:
142 codec->block_align = 33;
143 codec->frame_size = 160;
144 break;
145 default:
146 break;
147 }
148 size -= 4;
149 } else {
150 /* Need the codec type */
151 codec->codec_id = aiff_codec_get_id(codec->bits_per_coded_sample);
152 codec->bits_per_coded_sample = av_get_bits_per_sample(codec->codec_id);
153 }
154
155 /* Block align needs to be computed in all cases, as the definition
156 * is specific to applications -> here we use the WAVE format definition */
157 if (!codec->block_align)
158 codec->block_align = (codec->bits_per_coded_sample * codec->channels) >> 3;
159
160 codec->bit_rate = (codec->frame_size ? codec->sample_rate/codec->frame_size :
161 codec->sample_rate) * (codec->block_align << 3);
162
163 /* Chunk is over */
164 if (size)
165 url_fseek(pb, size, SEEK_CUR);
166
167 return num_frames;
168 }
169
170 #if CONFIG_AIFF_MUXER
171 typedef struct {
172 int64_t form;
173 int64_t frames;
174 int64_t ssnd;
175 } AIFFOutputContext;
176
177 static int aiff_write_header(AVFormatContext *s)
178 {
179 AIFFOutputContext *aiff = s->priv_data;
180 ByteIOContext *pb = s->pb;
181 AVCodecContext *enc = s->streams[0]->codec;
182 AVExtFloat sample_rate;
183 int aifc = 0;
184
185 /* First verify if format is ok */
186 if (!enc->codec_tag)
187 return -1;
188 if (enc->codec_tag != MKTAG('N','O','N','E'))
189 aifc = 1;
190
191 /* FORM AIFF header */
192 put_tag(pb, "FORM");
193 aiff->form = url_ftell(pb);
194 put_be32(pb, 0); /* file length */
195 put_tag(pb, aifc ? "AIFC" : "AIFF");
196
197 if (aifc) { // compressed audio
198 enc->bits_per_coded_sample = 16;
199 if (!enc->block_align) {
200 av_log(s, AV_LOG_ERROR, "block align not set\n");
201 return -1;
202 }
203 /* Version chunk */
204 put_tag(pb, "FVER");
205 put_be32(pb, 4);
206 put_be32(pb, 0xA2805140);
207 }
208
209 /* Common chunk */
210 put_tag(pb, "COMM");
211 put_be32(pb, aifc ? 24 : 18); /* size */
212 put_be16(pb, enc->channels); /* Number of channels */
213
214 aiff->frames = url_ftell(pb);
215 put_be32(pb, 0); /* Number of frames */
216
217 if (!enc->bits_per_coded_sample)
218 enc->bits_per_coded_sample = av_get_bits_per_sample(enc->codec_id);
219 if (!enc->bits_per_coded_sample) {
220 av_log(s, AV_LOG_ERROR, "could not compute bits per sample\n");
221 return -1;
222 }
223 if (!enc->block_align)
224 enc->block_align = (enc->bits_per_coded_sample * enc->channels) >> 3;
225
226 put_be16(pb, enc->bits_per_coded_sample); /* Sample size */
227
228 sample_rate = av_dbl2ext((double)enc->sample_rate);
229 put_buffer(pb, (uint8_t*)&sample_rate, sizeof(sample_rate));
230
231 if (aifc) {
232 put_le32(pb, enc->codec_tag);
233 put_be16(pb, 0);
234 }
235
236 /* Sound data chunk */
237 put_tag(pb, "SSND");
238 aiff->ssnd = url_ftell(pb); /* Sound chunk size */
239 put_be32(pb, 0); /* Sound samples data size */
240 put_be32(pb, 0); /* Data offset */
241 put_be32(pb, 0); /* Block-size (block align) */
242
243 av_set_pts_info(s->streams[0], 64, 1, s->streams[0]->codec->sample_rate);
244
245 /* Data is starting here */
246 put_flush_packet(pb);
247
248 return 0;
249 }
250
251 static int aiff_write_packet(AVFormatContext *s, AVPacket *pkt)
252 {
253 ByteIOContext *pb = s->pb;
254 put_buffer(pb, pkt->data, pkt->size);
255 return 0;
256 }
257
258 static int aiff_write_trailer(AVFormatContext *s)
259 {
260 ByteIOContext *pb = s->pb;
261 AIFFOutputContext *aiff = s->priv_data;
262 AVCodecContext *enc = s->streams[0]->codec;
263
264 /* Chunks sizes must be even */
265 int64_t file_size, end_size;
266 end_size = file_size = url_ftell(pb);
267 if (file_size & 1) {
268 put_byte(pb, 0);
269 end_size++;
270 }
271
272 if (!url_is_streamed(s->pb)) {
273 /* File length */
274 url_fseek(pb, aiff->form, SEEK_SET);
275 put_be32(pb, file_size - aiff->form - 4);
276
277 /* Number of sample frames */
278 url_fseek(pb, aiff->frames, SEEK_SET);
279 put_be32(pb, (file_size-aiff->ssnd-12)/enc->block_align);
280
281 /* Sound Data chunk size */
282 url_fseek(pb, aiff->ssnd, SEEK_SET);
283 put_be32(pb, file_size - aiff->ssnd - 4);
284
285 /* return to the end */
286 url_fseek(pb, end_size, SEEK_SET);
287
288 put_flush_packet(pb);
289 }
290
291 return 0;
292 }
293 #endif /* CONFIG_AIFF_MUXER */
294
295 static int aiff_probe(AVProbeData *p)
296 {
297 /* check file header */
298 if (p->buf[0] == 'F' && p->buf[1] == 'O' &&
299 p->buf[2] == 'R' && p->buf[3] == 'M' &&
300 p->buf[8] == 'A' && p->buf[9] == 'I' &&
301 p->buf[10] == 'F' && (p->buf[11] == 'F' || p->buf[11] == 'C'))
302 return AVPROBE_SCORE_MAX;
303 else
304 return 0;
305 }
306
307 /* aiff input */
308 static int aiff_read_header(AVFormatContext *s,
309 AVFormatParameters *ap)
310 {
311 int size, filesize;
312 int64_t offset = 0;
313 uint32_t tag;
314 unsigned version = AIFF_C_VERSION1;
315 ByteIOContext *pb = s->pb;
316 AVStream * st;
317
318 /* check FORM header */
319 filesize = get_tag(pb, &tag);
320 if (filesize < 0 || tag != MKTAG('F', 'O', 'R', 'M'))
321 return AVERROR_INVALIDDATA;
322
323 /* AIFF data type */
324 tag = get_le32(pb);
325 if (tag == MKTAG('A', 'I', 'F', 'F')) /* Got an AIFF file */
326 version = AIFF;
327 else if (tag != MKTAG('A', 'I', 'F', 'C')) /* An AIFF-C file then */
328 return AVERROR_INVALIDDATA;
329
330 filesize -= 4;
331
332 st = av_new_stream(s, 0);
333 if (!st)
334 return AVERROR(ENOMEM);
335
336 while (filesize > 0) {
337 /* parse different chunks */
338 size = get_tag(pb, &tag);
339 if (size < 0)
340 return size;
341
342 filesize -= size + 8;
343
344 switch (tag) {
345 case MKTAG('C', 'O', 'M', 'M'): /* Common chunk */
346 /* Then for the complete header info */
347 st->nb_frames = get_aiff_header(pb, st->codec, size, version);
348 if (st->nb_frames < 0)
349 return st->nb_frames;
350 if (offset > 0) // COMM is after SSND
351 goto got_sound;
352 break;
353 case MKTAG('F', 'V', 'E', 'R'): /* Version chunk */
354 version = get_be32(pb);
355 break;
356 case MKTAG('N', 'A', 'M', 'E'): /* Sample name chunk */
357 get_meta(s, "title" , size);
358 break;
359 case MKTAG('A', 'U', 'T', 'H'): /* Author chunk */
360 get_meta(s, "author" , size);
361 break;
362 case MKTAG('(', 'c', ')', ' '): /* Copyright chunk */
363 get_meta(s, "copyright", size);
364 break;
365 case MKTAG('A', 'N', 'N', 'O'): /* Annotation chunk */
366 get_meta(s, "comment" , size);
367 break;
368 case MKTAG('S', 'S', 'N', 'D'): /* Sampled sound chunk */
369 offset = get_be32(pb); /* Offset of sound data */
370 get_be32(pb); /* BlockSize... don't care */
371 offset += url_ftell(pb); /* Compute absolute data offset */
372 if (st->codec->block_align) /* Assume COMM already parsed */
373 goto got_sound;
374 if (url_is_streamed(pb)) {
375 av_log(s, AV_LOG_ERROR, "file is not seekable\n");
376 return -1;
377 }
378 url_fskip(pb, size - 8);
379 break;
380 case MKTAG('w', 'a', 'v', 'e'):
381 if ((uint64_t)size > (1<<30))
382 return -1;
383 st->codec->extradata = av_mallocz(size + FF_INPUT_BUFFER_PADDING_SIZE);
384 if (!st->codec->extradata)
385 return AVERROR(ENOMEM);
386 st->codec->extradata_size = size;
387 get_buffer(pb, st->codec->extradata, size);
388 break;
389 default: /* Jump */
390 if (size & 1) /* Always even aligned */
391 size++;
392 url_fskip (pb, size);
393 }
394 }
395
396 if (!st->codec->block_align) {
397 av_log(s, AV_LOG_ERROR, "could not find COMM tag\n");
398 return -1;
399 }
400
401 got_sound:
402 /* Now positioned, get the sound data start and end */
403 if (st->nb_frames)
404 s->file_size = st->nb_frames * st->codec->block_align;
405
406 av_set_pts_info(st, 64, 1, st->codec->sample_rate);
407 st->start_time = 0;
408 st->duration = st->codec->frame_size ?
409 st->nb_frames * st->codec->frame_size : st->nb_frames;
410
411 /* Position the stream at the first block */
412 url_fseek(pb, offset, SEEK_SET);
413
414 return 0;
415 }
416
417 #define MAX_SIZE 4096
418
419 static int aiff_read_packet(AVFormatContext *s,
420 AVPacket *pkt)
421 {
422 AVStream *st = s->streams[0];
423 int res;
424
425 /* Now for that packet */
426 res = av_get_packet(s->pb, pkt, (MAX_SIZE / st->codec->block_align) * st->codec->block_align);
427 if (res < 0)
428 return res;
429
430 /* Only one stream in an AIFF file */
431 pkt->stream_index = 0;
432 return 0;
433 }
434
435 #if CONFIG_AIFF_DEMUXER
436 AVInputFormat aiff_demuxer = {
437 "aiff",
438 NULL_IF_CONFIG_SMALL("Audio IFF"),
439 0,
440 aiff_probe,
441 aiff_read_header,
442 aiff_read_packet,
443 NULL,
444 pcm_read_seek,
445 .codec_tag= (const AVCodecTag* const []){codec_aiff_tags, 0},
446 };
447 #endif
448
449 #if CONFIG_AIFF_MUXER
450 AVOutputFormat aiff_muxer = {
451 "aiff",
452 NULL_IF_CONFIG_SMALL("Audio IFF"),
453 "audio/aiff",
454 "aif,aiff,afc,aifc",
455 sizeof(AIFFOutputContext),
456 CODEC_ID_PCM_S16BE,
457 CODEC_ID_NONE,
458 aiff_write_header,
459 aiff_write_packet,
460 aiff_write_trailer,
461 .codec_tag= (const AVCodecTag* const []){codec_aiff_tags, 0},
462 };
463 #endif