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 27static 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 49static 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 */ 65static 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 */ 82static 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 */ 100static 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 = 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 171typedef struct { 172 int64_t form; 173 int64_t frames; 174 int64_t ssnd; 175} AIFFOutputContext; 176 177static 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 251static 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 258static 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 295static 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 */ 308static 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 = s->streams[0]; 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 401got_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 419static int aiff_read_packet(AVFormatContext *s, 420 AVPacket *pkt) 421{ 422 AVStream *st = s->streams[0]; 423 int res; 424 425 /* End of stream may be reached */ 426 if (url_feof(s->pb)) 427 return AVERROR(EIO); 428 429 /* Now for that packet */ 430 res = av_get_packet(s->pb, pkt, (MAX_SIZE / st->codec->block_align) * st->codec->block_align); 431 if (res < 0) 432 return res; 433 434 /* Only one stream in an AIFF file */ 435 pkt->stream_index = 0; 436 return 0; 437} 438 439#if CONFIG_AIFF_DEMUXER 440AVInputFormat aiff_demuxer = { 441 "aiff", 442 NULL_IF_CONFIG_SMALL("Audio IFF"), 443 0, 444 aiff_probe, 445 aiff_read_header, 446 aiff_read_packet, 447 NULL, 448 pcm_read_seek, 449 .codec_tag= (const AVCodecTag* const []){codec_aiff_tags, 0}, 450}; 451#endif 452 453#if CONFIG_AIFF_MUXER 454AVOutputFormat aiff_muxer = { 455 "aiff", 456 NULL_IF_CONFIG_SMALL("Audio IFF"), 457 "audio/aiff", 458 "aif,aiff,afc,aifc", 459 sizeof(AIFFOutputContext), 460 CODEC_ID_PCM_S16BE, 461 CODEC_ID_NONE, 462 aiff_write_header, 463 aiff_write_packet, 464 aiff_write_trailer, 465 .codec_tag= (const AVCodecTag* const []){codec_aiff_tags, 0}, 466}; 467#endif 468