1/* 2 * WAV muxer and demuxer 3 * Copyright (c) 2001, 2002 Fabrice Bellard 4 * 5 * Sony Wave64 demuxer 6 * RF64 demuxer 7 * Copyright (c) 2009 Daniel Verkamp 8 * 9 * This file is part of FFmpeg. 10 * 11 * FFmpeg is free software; you can redistribute it and/or 12 * modify it under the terms of the GNU Lesser General Public 13 * License as published by the Free Software Foundation; either 14 * version 2.1 of the License, or (at your option) any later version. 15 * 16 * FFmpeg is distributed in the hope that it will be useful, 17 * but WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 19 * Lesser General Public License for more details. 20 * 21 * You should have received a copy of the GNU Lesser General Public 22 * License along with FFmpeg; if not, write to the Free Software 23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 24 */ 25#include "avformat.h" 26#include "raw.h" 27#include "riff.h" 28 29typedef struct { 30 int64_t data; 31 int64_t data_end; 32 int64_t minpts; 33 int64_t maxpts; 34 int last_duration; 35 int w64; 36} WAVContext; 37 38#if CONFIG_WAV_MUXER 39static int wav_write_header(AVFormatContext *s) 40{ 41 WAVContext *wav = s->priv_data; 42 ByteIOContext *pb = s->pb; 43 int64_t fmt, fact; 44 45 put_tag(pb, "RIFF"); 46 put_le32(pb, 0); /* file length */ 47 put_tag(pb, "WAVE"); 48 49 /* format header */ 50 fmt = ff_start_tag(pb, "fmt "); 51 if (ff_put_wav_header(pb, s->streams[0]->codec) < 0) { 52 av_log(s, AV_LOG_ERROR, "%s codec not supported in WAVE format\n", 53 s->streams[0]->codec->codec ? s->streams[0]->codec->codec->name : "NONE"); 54 av_free(wav); 55 return -1; 56 } 57 ff_end_tag(pb, fmt); 58 59 if (s->streams[0]->codec->codec_tag != 0x01 /* hence for all other than PCM */ 60 && !url_is_streamed(s->pb)) { 61 fact = ff_start_tag(pb, "fact"); 62 put_le32(pb, 0); 63 ff_end_tag(pb, fact); 64 } 65 66 av_set_pts_info(s->streams[0], 64, 1, s->streams[0]->codec->sample_rate); 67 wav->maxpts = wav->last_duration = 0; 68 wav->minpts = INT64_MAX; 69 70 /* data header */ 71 wav->data = ff_start_tag(pb, "data"); 72 73 put_flush_packet(pb); 74 75 return 0; 76} 77 78static int wav_write_packet(AVFormatContext *s, AVPacket *pkt) 79{ 80 ByteIOContext *pb = s->pb; 81 WAVContext *wav = s->priv_data; 82 put_buffer(pb, pkt->data, pkt->size); 83 if(pkt->pts != AV_NOPTS_VALUE) { 84 wav->minpts = FFMIN(wav->minpts, pkt->pts); 85 wav->maxpts = FFMAX(wav->maxpts, pkt->pts); 86 wav->last_duration = pkt->duration; 87 } else 88 av_log(s, AV_LOG_ERROR, "wav_write_packet: NOPTS\n"); 89 return 0; 90} 91 92static int wav_write_trailer(AVFormatContext *s) 93{ 94 ByteIOContext *pb = s->pb; 95 WAVContext *wav = s->priv_data; 96 int64_t file_size; 97 98 if (!url_is_streamed(s->pb)) { 99 ff_end_tag(pb, wav->data); 100 101 /* update file size */ 102 file_size = url_ftell(pb); 103 url_fseek(pb, 4, SEEK_SET); 104 put_le32(pb, (uint32_t)(file_size - 8)); 105 url_fseek(pb, file_size, SEEK_SET); 106 107 put_flush_packet(pb); 108 109 if(s->streams[0]->codec->codec_tag != 0x01) { 110 /* Update num_samps in fact chunk */ 111 int number_of_samples; 112 number_of_samples = av_rescale(wav->maxpts - wav->minpts + wav->last_duration, 113 s->streams[0]->codec->sample_rate * (int64_t)s->streams[0]->time_base.num, 114 s->streams[0]->time_base.den); 115 url_fseek(pb, wav->data-12, SEEK_SET); 116 put_le32(pb, number_of_samples); 117 url_fseek(pb, file_size, SEEK_SET); 118 put_flush_packet(pb); 119 } 120 } 121 return 0; 122} 123 124AVOutputFormat wav_muxer = { 125 "wav", 126 NULL_IF_CONFIG_SMALL("WAV format"), 127 "audio/x-wav", 128 "wav", 129 sizeof(WAVContext), 130 CODEC_ID_PCM_S16LE, 131 CODEC_ID_NONE, 132 wav_write_header, 133 wav_write_packet, 134 wav_write_trailer, 135 .codec_tag= (const AVCodecTag* const []){ff_codec_wav_tags, 0}, 136}; 137#endif /* CONFIG_WAV_MUXER */ 138 139 140#if CONFIG_WAV_DEMUXER 141/* return the size of the found tag */ 142static int64_t find_tag(ByteIOContext *pb, uint32_t tag1) 143{ 144 unsigned int tag; 145 int64_t size; 146 147 for (;;) { 148 if (url_feof(pb)) 149 return -1; 150 tag = get_le32(pb); 151 size = get_le32(pb); 152 if (tag == tag1) 153 break; 154 url_fseek(pb, size, SEEK_CUR); 155 } 156 return size; 157} 158 159static int wav_probe(AVProbeData *p) 160{ 161 /* check file header */ 162 if (p->buf_size <= 32) 163 return 0; 164 if (!memcmp(p->buf + 8, "WAVE", 4)) { 165 if (!memcmp(p->buf, "RIFF", 4)) 166 /* 167 Since ACT demuxer has standard WAV header at top of it's own, 168 returning score is decreased to avoid probe conflict 169 between ACT and WAV. 170 */ 171 return AVPROBE_SCORE_MAX - 1; 172 else if (!memcmp(p->buf, "RF64", 4) && 173 !memcmp(p->buf + 12, "ds64", 4)) 174 return AVPROBE_SCORE_MAX; 175 } 176 return 0; 177} 178 179/* wav input */ 180static int wav_read_header(AVFormatContext *s, 181 AVFormatParameters *ap) 182{ 183 int64_t size, av_uninit(data_size); 184 int rf64; 185 unsigned int tag; 186 ByteIOContext *pb = s->pb; 187 AVStream *st; 188 WAVContext *wav = s->priv_data; 189 190 /* check RIFF header */ 191 tag = get_le32(pb); 192 193 rf64 = tag == MKTAG('R', 'F', '6', '4'); 194 if (!rf64 && tag != MKTAG('R', 'I', 'F', 'F')) 195 return -1; 196 get_le32(pb); /* file size */ 197 tag = get_le32(pb); 198 if (tag != MKTAG('W', 'A', 'V', 'E')) 199 return -1; 200 201 if (rf64) { 202 if (get_le32(pb) != MKTAG('d', 's', '6', '4')) 203 return -1; 204 size = get_le32(pb); 205 if (size < 16) 206 return -1; 207 get_le64(pb); /* RIFF size */ 208 data_size = get_le64(pb); 209 url_fskip(pb, size - 16); /* skip rest of ds64 chunk */ 210 } 211 212 /* parse fmt header */ 213 size = find_tag(pb, MKTAG('f', 'm', 't', ' ')); 214 if (size < 0) 215 return -1; 216 st = av_new_stream(s, 0); 217 if (!st) 218 return AVERROR(ENOMEM); 219 220 ff_get_wav_header(pb, st->codec, size); 221 st->need_parsing = AVSTREAM_PARSE_FULL; 222 223 av_set_pts_info(st, 64, 1, st->codec->sample_rate); 224 225 size = find_tag(pb, MKTAG('d', 'a', 't', 'a')); 226 if (rf64) 227 size = data_size; 228 if (size < 0) 229 return -1; 230 if (!size) { 231 wav->data_end = INT64_MAX; 232 } else 233 wav->data_end= url_ftell(pb) + size; 234 return 0; 235} 236 237/** Find chunk with w64 GUID by skipping over other chunks 238 * @return the size of the found chunk 239 */ 240static int64_t find_guid(ByteIOContext *pb, const uint8_t guid1[16]) 241{ 242 uint8_t guid[16]; 243 int64_t size; 244 245 while (!url_feof(pb)) { 246 get_buffer(pb, guid, 16); 247 size = get_le64(pb); 248 if (size <= 24) 249 return -1; 250 if (!memcmp(guid, guid1, 16)) 251 return size; 252 url_fskip(pb, FFALIGN(size, INT64_C(8)) - 24); 253 } 254 return -1; 255} 256 257static const uint8_t guid_data[16] = { 'd', 'a', 't', 'a', 258 0xF3, 0xAC, 0xD3, 0x11, 0x8C, 0xD1, 0x00, 0xC0, 0x4F, 0x8E, 0xDB, 0x8A }; 259 260#define MAX_SIZE 4096 261 262static int wav_read_packet(AVFormatContext *s, 263 AVPacket *pkt) 264{ 265 int ret, size; 266 int64_t left; 267 AVStream *st; 268 WAVContext *wav = s->priv_data; 269 270 st = s->streams[0]; 271 272 left = wav->data_end - url_ftell(s->pb); 273 if (left <= 0){ 274 if (CONFIG_W64_DEMUXER && wav->w64) 275 left = find_guid(s->pb, guid_data) - 24; 276 else 277 left = find_tag(s->pb, MKTAG('d', 'a', 't', 'a')); 278 if (left < 0) 279 return AVERROR_EOF; 280 wav->data_end= url_ftell(s->pb) + left; 281 } 282 283 size = MAX_SIZE; 284 if (st->codec->block_align > 1) { 285 if (size < st->codec->block_align) 286 size = st->codec->block_align; 287 size = (size / st->codec->block_align) * st->codec->block_align; 288 } 289 size = FFMIN(size, left); 290 ret = av_get_packet(s->pb, pkt, size); 291 if (ret < 0) 292 return ret; 293 pkt->stream_index = 0; 294 295 return ret; 296} 297 298static int wav_read_seek(AVFormatContext *s, 299 int stream_index, int64_t timestamp, int flags) 300{ 301 AVStream *st; 302 303 st = s->streams[0]; 304 switch (st->codec->codec_id) { 305 case CODEC_ID_MP2: 306 case CODEC_ID_MP3: 307 case CODEC_ID_AC3: 308 case CODEC_ID_DTS: 309 /* use generic seeking with dynamically generated indexes */ 310 return -1; 311 default: 312 break; 313 } 314 return pcm_read_seek(s, stream_index, timestamp, flags); 315} 316 317AVInputFormat wav_demuxer = { 318 "wav", 319 NULL_IF_CONFIG_SMALL("WAV format"), 320 sizeof(WAVContext), 321 wav_probe, 322 wav_read_header, 323 wav_read_packet, 324 NULL, 325 wav_read_seek, 326 .flags= AVFMT_GENERIC_INDEX, 327 .codec_tag= (const AVCodecTag* const []){ff_codec_wav_tags, 0}, 328}; 329#endif /* CONFIG_WAV_DEMUXER */ 330 331 332#if CONFIG_W64_DEMUXER 333static const uint8_t guid_riff[16] = { 'r', 'i', 'f', 'f', 334 0x2E, 0x91, 0xCF, 0x11, 0xA5, 0xD6, 0x28, 0xDB, 0x04, 0xC1, 0x00, 0x00 }; 335 336static const uint8_t guid_wave[16] = { 'w', 'a', 'v', 'e', 337 0xF3, 0xAC, 0xD3, 0x11, 0x8C, 0xD1, 0x00, 0xC0, 0x4F, 0x8E, 0xDB, 0x8A }; 338 339static const uint8_t guid_fmt [16] = { 'f', 'm', 't', ' ', 340 0xF3, 0xAC, 0xD3, 0x11, 0x8C, 0xD1, 0x00, 0xC0, 0x4F, 0x8E, 0xDB, 0x8A }; 341 342static int w64_probe(AVProbeData *p) 343{ 344 if (p->buf_size <= 40) 345 return 0; 346 if (!memcmp(p->buf, guid_riff, 16) && 347 !memcmp(p->buf + 24, guid_wave, 16)) 348 return AVPROBE_SCORE_MAX; 349 else 350 return 0; 351} 352 353static int w64_read_header(AVFormatContext *s, AVFormatParameters *ap) 354{ 355 int64_t size; 356 ByteIOContext *pb = s->pb; 357 WAVContext *wav = s->priv_data; 358 AVStream *st; 359 uint8_t guid[16]; 360 361 get_buffer(pb, guid, 16); 362 if (memcmp(guid, guid_riff, 16)) 363 return -1; 364 365 if (get_le64(pb) < 16 + 8 + 16 + 8 + 16 + 8) /* riff + wave + fmt + sizes */ 366 return -1; 367 368 get_buffer(pb, guid, 16); 369 if (memcmp(guid, guid_wave, 16)) { 370 av_log(s, AV_LOG_ERROR, "could not find wave guid\n"); 371 return -1; 372 } 373 374 size = find_guid(pb, guid_fmt); 375 if (size < 0) { 376 av_log(s, AV_LOG_ERROR, "could not find fmt guid\n"); 377 return -1; 378 } 379 380 st = av_new_stream(s, 0); 381 if (!st) 382 return AVERROR(ENOMEM); 383 384 /* subtract chunk header size - normal wav file doesn't count it */ 385 ff_get_wav_header(pb, st->codec, size - 24); 386 url_fskip(pb, FFALIGN(size, INT64_C(8)) - size); 387 388 st->need_parsing = AVSTREAM_PARSE_FULL; 389 390 av_set_pts_info(st, 64, 1, st->codec->sample_rate); 391 392 size = find_guid(pb, guid_data); 393 if (size < 0) { 394 av_log(s, AV_LOG_ERROR, "could not find data guid\n"); 395 return -1; 396 } 397 wav->data_end = url_ftell(pb) + size - 24; 398 wav->w64 = 1; 399 400 return 0; 401} 402 403AVInputFormat w64_demuxer = { 404 "w64", 405 NULL_IF_CONFIG_SMALL("Sony Wave64 format"), 406 sizeof(WAVContext), 407 w64_probe, 408 w64_read_header, 409 wav_read_packet, 410 NULL, 411 wav_read_seek, 412 .flags = AVFMT_GENERIC_INDEX, 413 .codec_tag = (const AVCodecTag* const []){ff_codec_wav_tags, 0}, 414}; 415#endif /* CONFIG_W64_DEMUXER */ 416