libavformat/wav.c

   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
  29 typedef 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
  39 static 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
  78 static 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
  92 static 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
 124 AVOutputFormat 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 */
 142 static 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
 159 static 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 */
 180 static 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     wav->data_end= url_ftell(pb) + size;
 231     return 0;
 232 }
 233
 234 /** Find chunk with w64 GUID by skipping over other chunks
 235  * @return the size of the found chunk
 236  */
 237 static int64_t find_guid(ByteIOContext *pb, const uint8_t guid1[16])
 238 {
 239     uint8_t guid[16];
 240     int64_t size;
 241
 242     while (!url_feof(pb)) {
 243         get_buffer(pb, guid, 16);
 244         size = get_le64(pb);
 245         if (size <= 24)
 246             return -1;
 247         if (!memcmp(guid, guid1, 16))
 248             return size;
 249         url_fskip(pb, FFALIGN(size, INT64_C(8)) - 24);
 250     }
 251     return -1;
 252 }
 253
 254 static const uint8_t guid_data[16] = { 'd', 'a', 't', 'a',
 255     0xF3, 0xAC, 0xD3, 0x11, 0x8C, 0xD1, 0x00, 0xC0, 0x4F, 0x8E, 0xDB, 0x8A };
 256
 257 #define MAX_SIZE 4096
 258
 259 static int wav_read_packet(AVFormatContext *s,
 260                            AVPacket *pkt)
 261 {
 262     int ret, size;
 263     int64_t left;
 264     AVStream *st;
 265     WAVContext *wav = s->priv_data;
 266
 267     st = s->streams[0];
 268
 269     left = wav->data_end - url_ftell(s->pb);
 270     if (left <= 0){
 271         if (CONFIG_W64_DEMUXER && wav->w64)
 272             left = find_guid(s->pb, guid_data) - 24;
 273         else
 274             left = find_tag(s->pb, MKTAG('d', 'a', 't', 'a'));
 275         if (left < 0)
 276             return AVERROR_EOF;
 277         wav->data_end= url_ftell(s->pb) + left;
 278     }
 279
 280     size = MAX_SIZE;
 281     if (st->codec->block_align > 1) {
 282         if (size < st->codec->block_align)
 283             size = st->codec->block_align;
 284         size = (size / st->codec->block_align) * st->codec->block_align;
 285     }
 286     size = FFMIN(size, left);
 287     ret  = av_get_packet(s->pb, pkt, size);
 288     if (ret < 0)
 289         return ret;
 290     pkt->stream_index = 0;
 291
 292     return ret;
 293 }
 294
 295 static int wav_read_seek(AVFormatContext *s,
 296                          int stream_index, int64_t timestamp, int flags)
 297 {
 298     AVStream *st;
 299
 300     st = s->streams[0];
 301     switch (st->codec->codec_id) {
 302     case CODEC_ID_MP2:
 303     case CODEC_ID_MP3:
 304     case CODEC_ID_AC3:
 305     case CODEC_ID_DTS:
 306         /* use generic seeking with dynamically generated indexes */
 307         return -1;
 308     default:
 309         break;
 310     }
 311     return pcm_read_seek(s, stream_index, timestamp, flags);
 312 }
 313
 314 AVInputFormat wav_demuxer = {
 315     "wav",
 316     NULL_IF_CONFIG_SMALL("WAV format"),
 317     sizeof(WAVContext),
 318     wav_probe,
 319     wav_read_header,
 320     wav_read_packet,
 321     NULL,
 322     wav_read_seek,
 323     .flags= AVFMT_GENERIC_INDEX,
 324     .codec_tag= (const AVCodecTag* const []){ff_codec_wav_tags, 0},
 325 };
 326 #endif /* CONFIG_WAV_DEMUXER */
 327
 328
 329 #if CONFIG_W64_DEMUXER
 330 static const uint8_t guid_riff[16] = { 'r', 'i', 'f', 'f',
 331     0x2E, 0x91, 0xCF, 0x11, 0xA5, 0xD6, 0x28, 0xDB, 0x04, 0xC1, 0x00, 0x00 };
 332
 333 static const uint8_t guid_wave[16] = { 'w', 'a', 'v', 'e',
 334     0xF3, 0xAC, 0xD3, 0x11, 0x8C, 0xD1, 0x00, 0xC0, 0x4F, 0x8E, 0xDB, 0x8A };
 335
 336 static const uint8_t guid_fmt [16] = { 'f', 'm', 't', ' ',
 337     0xF3, 0xAC, 0xD3, 0x11, 0x8C, 0xD1, 0x00, 0xC0, 0x4F, 0x8E, 0xDB, 0x8A };
 338
 339 static int w64_probe(AVProbeData *p)
 340 {
 341     if (p->buf_size <= 40)
 342         return 0;
 343     if (!memcmp(p->buf,      guid_riff, 16) &&
 344         !memcmp(p->buf + 24, guid_wave, 16))
 345         return AVPROBE_SCORE_MAX;
 346     else
 347         return 0;
 348 }
 349
 350 static int w64_read_header(AVFormatContext *s, AVFormatParameters *ap)
 351 {
 352     int64_t size;
 353     ByteIOContext *pb  = s->pb;
 354     WAVContext    *wav = s->priv_data;
 355     AVStream *st;
 356     uint8_t guid[16];
 357
 358     get_buffer(pb, guid, 16);
 359     if (memcmp(guid, guid_riff, 16))
 360         return -1;
 361
 362     if (get_le64(pb) < 16 + 8 + 16 + 8 + 16 + 8) /* riff + wave + fmt + sizes */
 363         return -1;
 364
 365     get_buffer(pb, guid, 16);
 366     if (memcmp(guid, guid_wave, 16)) {
 367         av_log(s, AV_LOG_ERROR, "could not find wave guid\n");
 368         return -1;
 369     }
 370
 371     size = find_guid(pb, guid_fmt);
 372     if (size < 0) {
 373         av_log(s, AV_LOG_ERROR, "could not find fmt guid\n");
 374         return -1;
 375     }
 376
 377     st = av_new_stream(s, 0);
 378     if (!st)
 379         return AVERROR(ENOMEM);
 380
 381     /* subtract chunk header size - normal wav file doesn't count it */
 382     ff_get_wav_header(pb, st->codec, size - 24);
 383     url_fskip(pb, FFALIGN(size, INT64_C(8)) - size);
 384
 385     st->need_parsing = AVSTREAM_PARSE_FULL;
 386
 387     av_set_pts_info(st, 64, 1, st->codec->sample_rate);
 388
 389     size = find_guid(pb, guid_data);
 390     if (size < 0) {
 391         av_log(s, AV_LOG_ERROR, "could not find data guid\n");
 392         return -1;
 393     }
 394     wav->data_end = url_ftell(pb) + size - 24;
 395     wav->w64      = 1;
 396
 397     return 0;
 398 }
 399
 400 AVInputFormat w64_demuxer = {
 401     "w64",
 402     NULL_IF_CONFIG_SMALL("Sony Wave64 format"),
 403     sizeof(WAVContext),
 404     w64_probe,
 405     w64_read_header,
 406     wav_read_packet,
 407     NULL,
 408     wav_read_seek,
 409     .flags = AVFMT_GENERIC_INDEX,
 410     .codec_tag = (const AVCodecTag* const []){ff_codec_wav_tags, 0},
 411 };
 412 #endif /* CONFIG_W64_DEMUXER */