| 1 | /* |
| 2 | * AIFF/AIFF-C 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/intreadwrite.h" |
| 23 | #include "libavutil/mathematics.h" |
| 24 | #include "libavutil/dict.h" |
| 25 | #include "avformat.h" |
| 26 | #include "internal.h" |
| 27 | #include "pcm.h" |
| 28 | #include "aiff.h" |
| 29 | #include "isom.h" |
| 30 | #include "id3v2.h" |
| 31 | #include "mov_chan.h" |
| 32 | |
| 33 | #define AIFF 0 |
| 34 | #define AIFF_C_VERSION1 0xA2805140 |
| 35 | |
| 36 | typedef struct { |
| 37 | int64_t data_end; |
| 38 | int block_duration; |
| 39 | } AIFFInputContext; |
| 40 | |
| 41 | static enum AVCodecID aiff_codec_get_id(int bps) |
| 42 | { |
| 43 | if (bps <= 8) |
| 44 | return AV_CODEC_ID_PCM_S8; |
| 45 | if (bps <= 16) |
| 46 | return AV_CODEC_ID_PCM_S16BE; |
| 47 | if (bps <= 24) |
| 48 | return AV_CODEC_ID_PCM_S24BE; |
| 49 | if (bps <= 32) |
| 50 | return AV_CODEC_ID_PCM_S32BE; |
| 51 | |
| 52 | /* bigger than 32 isn't allowed */ |
| 53 | return AV_CODEC_ID_NONE; |
| 54 | } |
| 55 | |
| 56 | /* returns the size of the found tag */ |
| 57 | static int get_tag(AVIOContext *pb, uint32_t * tag) |
| 58 | { |
| 59 | int size; |
| 60 | |
| 61 | if (avio_feof(pb)) |
| 62 | return AVERROR(EIO); |
| 63 | |
| 64 | *tag = avio_rl32(pb); |
| 65 | size = avio_rb32(pb); |
| 66 | |
| 67 | if (size < 0) |
| 68 | size = 0x7fffffff; |
| 69 | |
| 70 | return size; |
| 71 | } |
| 72 | |
| 73 | /* Metadata string read */ |
| 74 | static void get_meta(AVFormatContext *s, const char *key, int size) |
| 75 | { |
| 76 | uint8_t *str = av_malloc(size+1); |
| 77 | |
| 78 | if (str) { |
| 79 | int res = avio_read(s->pb, str, size); |
| 80 | if (res < 0){ |
| 81 | av_free(str); |
| 82 | return; |
| 83 | } |
| 84 | size += (size&1)-res; |
| 85 | str[res] = 0; |
| 86 | av_dict_set(&s->metadata, key, str, AV_DICT_DONT_STRDUP_VAL); |
| 87 | }else |
| 88 | size+= size&1; |
| 89 | |
| 90 | avio_skip(s->pb, size); |
| 91 | } |
| 92 | |
| 93 | /* Returns the number of sound data frames or negative on error */ |
| 94 | static unsigned int get_aiff_header(AVFormatContext *s, int size, |
| 95 | unsigned version) |
| 96 | { |
| 97 | AVIOContext *pb = s->pb; |
| 98 | AVCodecContext *codec = s->streams[0]->codec; |
| 99 | AIFFInputContext *aiff = s->priv_data; |
| 100 | int exp; |
| 101 | uint64_t val; |
| 102 | double sample_rate; |
| 103 | unsigned int num_frames; |
| 104 | |
| 105 | if (size & 1) |
| 106 | size++; |
| 107 | codec->codec_type = AVMEDIA_TYPE_AUDIO; |
| 108 | codec->channels = avio_rb16(pb); |
| 109 | num_frames = avio_rb32(pb); |
| 110 | codec->bits_per_coded_sample = avio_rb16(pb); |
| 111 | |
| 112 | exp = avio_rb16(pb); |
| 113 | val = avio_rb64(pb); |
| 114 | sample_rate = ldexp(val, exp - 16383 - 63); |
| 115 | codec->sample_rate = sample_rate; |
| 116 | size -= 18; |
| 117 | |
| 118 | /* get codec id for AIFF-C */ |
| 119 | if (version == AIFF_C_VERSION1) { |
| 120 | codec->codec_tag = avio_rl32(pb); |
| 121 | codec->codec_id = ff_codec_get_id(ff_codec_aiff_tags, codec->codec_tag); |
| 122 | size -= 4; |
| 123 | } |
| 124 | |
| 125 | if (version != AIFF_C_VERSION1 || codec->codec_id == AV_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 | aiff->block_duration = 1; |
| 129 | } else { |
| 130 | switch (codec->codec_id) { |
| 131 | case AV_CODEC_ID_PCM_F32BE: |
| 132 | case AV_CODEC_ID_PCM_F64BE: |
| 133 | case AV_CODEC_ID_PCM_S16LE: |
| 134 | case AV_CODEC_ID_PCM_ALAW: |
| 135 | case AV_CODEC_ID_PCM_MULAW: |
| 136 | aiff->block_duration = 1; |
| 137 | break; |
| 138 | case AV_CODEC_ID_ADPCM_IMA_QT: |
| 139 | codec->block_align = 34*codec->channels; |
| 140 | break; |
| 141 | case AV_CODEC_ID_MACE3: |
| 142 | codec->block_align = 2*codec->channels; |
| 143 | break; |
| 144 | case AV_CODEC_ID_ADPCM_G726LE: |
| 145 | codec->bits_per_coded_sample = 5; |
| 146 | case AV_CODEC_ID_ADPCM_G722: |
| 147 | case AV_CODEC_ID_MACE6: |
| 148 | codec->block_align = 1*codec->channels; |
| 149 | break; |
| 150 | case AV_CODEC_ID_GSM: |
| 151 | codec->block_align = 33; |
| 152 | break; |
| 153 | default: |
| 154 | aiff->block_duration = 1; |
| 155 | break; |
| 156 | } |
| 157 | if (codec->block_align > 0) |
| 158 | aiff->block_duration = av_get_audio_frame_duration(codec, |
| 159 | codec->block_align); |
| 160 | } |
| 161 | |
| 162 | /* Block align needs to be computed in all cases, as the definition |
| 163 | * is specific to applications -> here we use the WAVE format definition */ |
| 164 | if (!codec->block_align) |
| 165 | codec->block_align = (av_get_bits_per_sample(codec->codec_id) * codec->channels) >> 3; |
| 166 | |
| 167 | if (aiff->block_duration) { |
| 168 | codec->bit_rate = codec->sample_rate * (codec->block_align << 3) / |
| 169 | aiff->block_duration; |
| 170 | } |
| 171 | |
| 172 | /* Chunk is over */ |
| 173 | if (size) |
| 174 | avio_skip(pb, size); |
| 175 | |
| 176 | return num_frames; |
| 177 | } |
| 178 | |
| 179 | static int aiff_probe(AVProbeData *p) |
| 180 | { |
| 181 | /* check file header */ |
| 182 | if (p->buf[0] == 'F' && p->buf[1] == 'O' && |
| 183 | p->buf[2] == 'R' && p->buf[3] == 'M' && |
| 184 | p->buf[8] == 'A' && p->buf[9] == 'I' && |
| 185 | p->buf[10] == 'F' && (p->buf[11] == 'F' || p->buf[11] == 'C')) |
| 186 | return AVPROBE_SCORE_MAX; |
| 187 | else |
| 188 | return 0; |
| 189 | } |
| 190 | |
| 191 | /* aiff input */ |
| 192 | static int aiff_read_header(AVFormatContext *s) |
| 193 | { |
| 194 | int ret, size, filesize; |
| 195 | int64_t offset = 0, position; |
| 196 | uint32_t tag; |
| 197 | unsigned version = AIFF_C_VERSION1; |
| 198 | AVIOContext *pb = s->pb; |
| 199 | AVStream * st; |
| 200 | AIFFInputContext *aiff = s->priv_data; |
| 201 | ID3v2ExtraMeta *id3v2_extra_meta = NULL; |
| 202 | |
| 203 | /* check FORM header */ |
| 204 | filesize = get_tag(pb, &tag); |
| 205 | if (filesize < 0 || tag != MKTAG('F', 'O', 'R', 'M')) |
| 206 | return AVERROR_INVALIDDATA; |
| 207 | |
| 208 | /* AIFF data type */ |
| 209 | tag = avio_rl32(pb); |
| 210 | if (tag == MKTAG('A', 'I', 'F', 'F')) /* Got an AIFF file */ |
| 211 | version = AIFF; |
| 212 | else if (tag != MKTAG('A', 'I', 'F', 'C')) /* An AIFF-C file then */ |
| 213 | return AVERROR_INVALIDDATA; |
| 214 | |
| 215 | filesize -= 4; |
| 216 | |
| 217 | st = avformat_new_stream(s, NULL); |
| 218 | if (!st) |
| 219 | return AVERROR(ENOMEM); |
| 220 | |
| 221 | while (filesize > 0) { |
| 222 | /* parse different chunks */ |
| 223 | size = get_tag(pb, &tag); |
| 224 | if (size < 0) |
| 225 | return size; |
| 226 | |
| 227 | filesize -= size + 8; |
| 228 | |
| 229 | switch (tag) { |
| 230 | case MKTAG('C', 'O', 'M', 'M'): /* Common chunk */ |
| 231 | /* Then for the complete header info */ |
| 232 | st->nb_frames = get_aiff_header(s, size, version); |
| 233 | if (st->nb_frames < 0) |
| 234 | return st->nb_frames; |
| 235 | if (offset > 0) // COMM is after SSND |
| 236 | goto got_sound; |
| 237 | break; |
| 238 | case MKTAG('I', 'D', '3', ' '): |
| 239 | position = avio_tell(pb); |
| 240 | ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta, size); |
| 241 | if (id3v2_extra_meta) |
| 242 | if ((ret = ff_id3v2_parse_apic(s, &id3v2_extra_meta)) < 0) { |
| 243 | ff_id3v2_free_extra_meta(&id3v2_extra_meta); |
| 244 | return ret; |
| 245 | } |
| 246 | ff_id3v2_free_extra_meta(&id3v2_extra_meta); |
| 247 | if (position + size > avio_tell(pb)) |
| 248 | avio_skip(pb, position + size - avio_tell(pb)); |
| 249 | break; |
| 250 | case MKTAG('F', 'V', 'E', 'R'): /* Version chunk */ |
| 251 | version = avio_rb32(pb); |
| 252 | break; |
| 253 | case MKTAG('N', 'A', 'M', 'E'): /* Sample name chunk */ |
| 254 | get_meta(s, "title" , size); |
| 255 | break; |
| 256 | case MKTAG('A', 'U', 'T', 'H'): /* Author chunk */ |
| 257 | get_meta(s, "author" , size); |
| 258 | break; |
| 259 | case MKTAG('(', 'c', ')', ' '): /* Copyright chunk */ |
| 260 | get_meta(s, "copyright", size); |
| 261 | break; |
| 262 | case MKTAG('A', 'N', 'N', 'O'): /* Annotation chunk */ |
| 263 | get_meta(s, "comment" , size); |
| 264 | break; |
| 265 | case MKTAG('S', 'S', 'N', 'D'): /* Sampled sound chunk */ |
| 266 | aiff->data_end = avio_tell(pb) + size; |
| 267 | offset = avio_rb32(pb); /* Offset of sound data */ |
| 268 | avio_rb32(pb); /* BlockSize... don't care */ |
| 269 | offset += avio_tell(pb); /* Compute absolute data offset */ |
| 270 | if (st->codec->block_align && !pb->seekable) /* Assume COMM already parsed */ |
| 271 | goto got_sound; |
| 272 | if (!pb->seekable) { |
| 273 | av_log(s, AV_LOG_ERROR, "file is not seekable\n"); |
| 274 | return -1; |
| 275 | } |
| 276 | avio_skip(pb, size - 8); |
| 277 | break; |
| 278 | case MKTAG('w', 'a', 'v', 'e'): |
| 279 | if ((uint64_t)size > (1<<30)) |
| 280 | return -1; |
| 281 | if (ff_get_extradata(st->codec, pb, size) < 0) |
| 282 | return AVERROR(ENOMEM); |
| 283 | if (st->codec->codec_id == AV_CODEC_ID_QDM2 && size>=12*4 && !st->codec->block_align) { |
| 284 | st->codec->block_align = AV_RB32(st->codec->extradata+11*4); |
| 285 | aiff->block_duration = AV_RB32(st->codec->extradata+9*4); |
| 286 | } else if (st->codec->codec_id == AV_CODEC_ID_QCELP) { |
| 287 | char rate = 0; |
| 288 | if (size >= 25) |
| 289 | rate = st->codec->extradata[24]; |
| 290 | switch (rate) { |
| 291 | case 'H': // RATE_HALF |
| 292 | st->codec->block_align = 17; |
| 293 | break; |
| 294 | case 'F': // RATE_FULL |
| 295 | default: |
| 296 | st->codec->block_align = 35; |
| 297 | } |
| 298 | aiff->block_duration = 160; |
| 299 | st->codec->bit_rate = st->codec->sample_rate * (st->codec->block_align << 3) / |
| 300 | aiff->block_duration; |
| 301 | } |
| 302 | break; |
| 303 | case MKTAG('C','H','A','N'): |
| 304 | if(ff_mov_read_chan(s, pb, st, size) < 0) |
| 305 | return AVERROR_INVALIDDATA; |
| 306 | break; |
| 307 | default: /* Jump */ |
| 308 | if (size & 1) /* Always even aligned */ |
| 309 | size++; |
| 310 | avio_skip(pb, size); |
| 311 | } |
| 312 | } |
| 313 | |
| 314 | got_sound: |
| 315 | if (!st->codec->block_align) { |
| 316 | av_log(s, AV_LOG_ERROR, "could not find COMM tag or invalid block_align value\n"); |
| 317 | return -1; |
| 318 | } |
| 319 | |
| 320 | /* Now positioned, get the sound data start and end */ |
| 321 | avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate); |
| 322 | st->start_time = 0; |
| 323 | st->duration = st->nb_frames * aiff->block_duration; |
| 324 | |
| 325 | /* Position the stream at the first block */ |
| 326 | avio_seek(pb, offset, SEEK_SET); |
| 327 | |
| 328 | return 0; |
| 329 | } |
| 330 | |
| 331 | #define MAX_SIZE 4096 |
| 332 | |
| 333 | static int aiff_read_packet(AVFormatContext *s, |
| 334 | AVPacket *pkt) |
| 335 | { |
| 336 | AVStream *st = s->streams[0]; |
| 337 | AIFFInputContext *aiff = s->priv_data; |
| 338 | int64_t max_size; |
| 339 | int res, size; |
| 340 | |
| 341 | /* calculate size of remaining data */ |
| 342 | max_size = aiff->data_end - avio_tell(s->pb); |
| 343 | if (max_size <= 0) |
| 344 | return AVERROR_EOF; |
| 345 | |
| 346 | /* Now for that packet */ |
| 347 | switch (st->codec->codec_id) { |
| 348 | case AV_CODEC_ID_ADPCM_IMA_QT: |
| 349 | case AV_CODEC_ID_GSM: |
| 350 | case AV_CODEC_ID_QDM2: |
| 351 | case AV_CODEC_ID_QCELP: |
| 352 | size = st->codec->block_align; |
| 353 | break; |
| 354 | default: |
| 355 | size = (MAX_SIZE / st->codec->block_align) * st->codec->block_align; |
| 356 | } |
| 357 | size = FFMIN(max_size, size); |
| 358 | res = av_get_packet(s->pb, pkt, size); |
| 359 | if (res < 0) |
| 360 | return res; |
| 361 | |
| 362 | if (size >= st->codec->block_align) |
| 363 | pkt->flags &= ~AV_PKT_FLAG_CORRUPT; |
| 364 | /* Only one stream in an AIFF file */ |
| 365 | pkt->stream_index = 0; |
| 366 | pkt->duration = (res / st->codec->block_align) * aiff->block_duration; |
| 367 | return 0; |
| 368 | } |
| 369 | |
| 370 | AVInputFormat ff_aiff_demuxer = { |
| 371 | .name = "aiff", |
| 372 | .long_name = NULL_IF_CONFIG_SMALL("Audio IFF"), |
| 373 | .priv_data_size = sizeof(AIFFInputContext), |
| 374 | .read_probe = aiff_probe, |
| 375 | .read_header = aiff_read_header, |
| 376 | .read_packet = aiff_read_packet, |
| 377 | .read_seek = ff_pcm_read_seek, |
| 378 | .codec_tag = (const AVCodecTag* const []){ ff_codec_aiff_tags, 0 }, |
| 379 | }; |