libavformat/wavenc.c

   1 /*
   2  * WAV muxer
   3  * Copyright (c) 2001, 2002 Fabrice Bellard
   4  *
   5  * Sony Wave64 muxer
   6  * Copyright (c) 2012 Paul B Mahol
   7  *
   8  * WAV muxer RF64 support
   9  * Copyright (c) 2013 Daniel Verkamp <daniel@drv.nu>
  10  *
  11  * EBU Tech 3285 - Supplement 3 - Peak Envelope Chunk encoder
  12  * Copyright (c) 2014 Georg Lippitsch <georg.lippitsch@gmx.at>
  13  *
  14  * This file is part of FFmpeg.
  15  *
  16  * FFmpeg is free software; you can redistribute it and/or
  17  * modify it under the terms of the GNU Lesser General Public
  18  * License as published by the Free Software Foundation; either
  19  * version 2.1 of the License, or (at your option) any later version.
  20  *
  21  * FFmpeg is distributed in the hope that it will be useful,
  22  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  23  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  24  * Lesser General Public License for more details.
  25  *
  26  * You should have received a copy of the GNU Lesser General Public
  27  * License along with FFmpeg; if not, write to the Free Software
  28  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  29  */
  30
  31 #include <stdint.h>
  32 #include <string.h>
  33
  34 #include "libavutil/avstring.h"
  35 #include "libavutil/dict.h"
  36 #include "libavutil/common.h"
  37 #include "libavutil/intreadwrite.h"
  38 #include "libavutil/mathematics.h"
  39 #include "libavutil/opt.h"
  40 #include "libavutil/time.h"
  41 #include "libavutil/time_internal.h"
  42
  43 #include "avformat.h"
  44 #include "avio.h"
  45 #include "avio_internal.h"
  46 #include "internal.h"
  47 #include "riff.h"
  48
  49 #define RF64_AUTO   (-1)
  50 #define RF64_NEVER  0
  51 #define RF64_ALWAYS 1
  52
  53 #define PEAK_BUFFER_SIZE   1024
  54
  55 typedef enum {
  56     PEAK_OFF = 0,
  57     PEAK_ON,
  58     PEAK_ONLY
  59 } PeakType;
  60
  61 typedef enum {
  62     PEAK_FORMAT_UINT8 = 1,
  63     PEAK_FORMAT_UINT16
  64 } PeakFormat;
  65
  66 typedef struct WAVMuxContext {
  67     const AVClass *class;
  68     int64_t data;
  69     int64_t fact_pos;
  70     int64_t ds64;
  71     int64_t minpts;
  72     int64_t maxpts;
  73     int16_t *peak_maxpos, *peak_maxneg;
  74     uint32_t peak_num_frames;
  75     uint32_t peak_outbuf_size;
  76     uint32_t peak_outbuf_bytes;
  77     uint32_t peak_pos_pop;
  78     uint16_t peak_pop;
  79     uint8_t *peak_output;
  80     int last_duration;
  81     int write_bext;
  82     int write_peak;
  83     int rf64;
  84     int peak_block_size;
  85     int peak_format;
  86     int peak_block_pos;
  87     int peak_ppv;
  88     int peak_bps;
  89 } WAVMuxContext;
  90
  91 #if CONFIG_WAV_MUXER
  92 static inline void bwf_write_bext_string(AVFormatContext *s, const char *key, int maxlen)
  93 {
  94     AVDictionaryEntry *tag;
  95     size_t len = 0;
  96
  97     if (tag = av_dict_get(s->metadata, key, NULL, 0)) {
  98         len = strlen(tag->value);
  99         len = FFMIN(len, maxlen);
 100         avio_write(s->pb, tag->value, len);
 101     }
 102
 103     ffio_fill(s->pb, 0, maxlen - len);
 104 }
 105
 106 static void bwf_write_bext_chunk(AVFormatContext *s)
 107 {
 108     AVDictionaryEntry *tmp_tag;
 109     uint64_t time_reference = 0;
 110     int64_t bext = ff_start_tag(s->pb, "bext");
 111
 112     bwf_write_bext_string(s, "description", 256);
 113     bwf_write_bext_string(s, "originator", 32);
 114     bwf_write_bext_string(s, "originator_reference", 32);
 115     bwf_write_bext_string(s, "origination_date", 10);
 116     bwf_write_bext_string(s, "origination_time", 8);
 117
 118     if (tmp_tag = av_dict_get(s->metadata, "time_reference", NULL, 0))
 119         time_reference = strtoll(tmp_tag->value, NULL, 10);
 120     avio_wl64(s->pb, time_reference);
 121     avio_wl16(s->pb, 1);  // set version to 1
 122
 123     if ((tmp_tag = av_dict_get(s->metadata, "umid", NULL, 0)) && strlen(tmp_tag->value) > 2) {
 124         unsigned char umidpart_str[17] = {0};
 125         int64_t i;
 126         uint64_t umidpart;
 127         size_t len = strlen(tmp_tag->value+2);
 128
 129         for (i = 0; i < len/16; i++) {
 130             memcpy(umidpart_str, tmp_tag->value + 2 + (i*16), 16);
 131             umidpart = strtoll(umidpart_str, NULL, 16);
 132             avio_wb64(s->pb, umidpart);
 133         }
 134         ffio_fill(s->pb, 0, 64 - i*8);
 135     } else
 136         ffio_fill(s->pb, 0, 64); // zero UMID
 137
 138     ffio_fill(s->pb, 0, 190); // Reserved
 139
 140     if (tmp_tag = av_dict_get(s->metadata, "coding_history", NULL, 0))
 141         avio_put_str(s->pb, tmp_tag->value);
 142
 143     ff_end_tag(s->pb, bext);
 144 }
 145
 146 static av_cold void peak_free_buffers(AVFormatContext *s)
 147 {
 148     WAVMuxContext *wav = s->priv_data;
 149
 150     av_freep(&wav->peak_maxpos);
 151     av_freep(&wav->peak_maxneg);
 152     av_freep(&wav->peak_output);
 153 }
 154
 155 static av_cold int peak_init_writer(AVFormatContext *s)
 156 {
 157     WAVMuxContext *wav = s->priv_data;
 158     AVCodecParameters *par = s->streams[0]->codecpar;
 159
 160     if (par->codec_id != AV_CODEC_ID_PCM_S8 &&
 161         par->codec_id != AV_CODEC_ID_PCM_S16LE &&
 162         par->codec_id != AV_CODEC_ID_PCM_U8 &&
 163         par->codec_id != AV_CODEC_ID_PCM_U16LE) {
 164         AVCodec *codec = avcodec_find_decoder(s->streams[0]->codecpar->codec_id);
 165         av_log(s, AV_LOG_ERROR, "%s codec not supported for Peak Chunk\n",
 166                codec ? codec->name : "NONE");
 167         return -1;
 168     }
 169
 170     wav->peak_bps = av_get_bits_per_sample(par->codec_id) / 8;
 171
 172     if (wav->peak_bps == 1 && wav->peak_format == PEAK_FORMAT_UINT16) {
 173         av_log(s, AV_LOG_ERROR,
 174                "Writing 16 bit peak for 8 bit audio does not make sense\n");
 175         return AVERROR(EINVAL);
 176     }
 177
 178     wav->peak_maxpos = av_mallocz_array(par->channels, sizeof(*wav->peak_maxpos));
 179     wav->peak_maxneg = av_mallocz_array(par->channels, sizeof(*wav->peak_maxneg));
 180     wav->peak_output = av_malloc(PEAK_BUFFER_SIZE);
 181     if (!wav->peak_maxpos || !wav->peak_maxneg || !wav->peak_output)
 182         goto nomem;
 183
 184     wav->peak_outbuf_size = PEAK_BUFFER_SIZE;
 185
 186     return 0;
 187
 188 nomem:
 189     av_log(s, AV_LOG_ERROR, "Out of memory\n");
 190     peak_free_buffers(s);
 191     return AVERROR(ENOMEM);
 192 }
 193
 194 static void peak_write_frame(AVFormatContext *s)
 195 {
 196     WAVMuxContext *wav = s->priv_data;
 197     AVCodecParameters *par = s->streams[0]->codecpar;
 198     int peak_of_peaks;
 199     int c;
 200
 201     if (!wav->peak_output)
 202         return;
 203
 204     for (c = 0; c < par->channels; c++) {
 205         wav->peak_maxneg[c] = -wav->peak_maxneg[c];
 206
 207         if (wav->peak_bps == 2 && wav->peak_format == PEAK_FORMAT_UINT8) {
 208             wav->peak_maxpos[c] = wav->peak_maxpos[c] / 256;
 209             wav->peak_maxneg[c] = wav->peak_maxneg[c] / 256;
 210         }
 211
 212         if (wav->peak_ppv == 1)
 213             wav->peak_maxpos[c] =
 214                 FFMAX(wav->peak_maxpos[c], wav->peak_maxneg[c]);
 215
 216         peak_of_peaks = FFMAX3(wav->peak_maxpos[c], wav->peak_maxneg[c],
 217                                wav->peak_pop);
 218         if (peak_of_peaks > wav->peak_pop)
 219             wav->peak_pos_pop = wav->peak_num_frames;
 220         wav->peak_pop = peak_of_peaks;
 221
 222         if (wav->peak_outbuf_size - wav->peak_outbuf_bytes <
 223             wav->peak_format * wav->peak_ppv) {
 224             wav->peak_outbuf_size += PEAK_BUFFER_SIZE;
 225             wav->peak_output = av_realloc(wav->peak_output,
 226                                           wav->peak_outbuf_size);
 227             if (!wav->peak_output) {
 228                 av_log(s, AV_LOG_ERROR, "No memory for peak data\n");
 229                 return;
 230             }
 231         }
 232
 233         if (wav->peak_format == PEAK_FORMAT_UINT8) {
 234             wav->peak_output[wav->peak_outbuf_bytes++] =
 235                 wav->peak_maxpos[c];
 236             if (wav->peak_ppv == 2) {
 237                 wav->peak_output[wav->peak_outbuf_bytes++] =
 238                     wav->peak_maxneg[c];
 239             }
 240         } else {
 241             AV_WL16(wav->peak_output + wav->peak_outbuf_bytes,
 242                     wav->peak_maxpos[c]);
 243             wav->peak_outbuf_bytes += 2;
 244             if (wav->peak_ppv == 2) {
 245                 AV_WL16(wav->peak_output + wav->peak_outbuf_bytes,
 246                         wav->peak_maxneg[c]);
 247                 wav->peak_outbuf_bytes += 2;
 248             }
 249         }
 250         wav->peak_maxpos[c] = 0;
 251         wav->peak_maxneg[c] = 0;
 252     }
 253     wav->peak_num_frames++;
 254 }
 255
 256 static int peak_write_chunk(AVFormatContext *s)
 257 {
 258     WAVMuxContext *wav = s->priv_data;
 259     AVIOContext *pb = s->pb;
 260     AVCodecParameters *par = s->streams[0]->codecpar;
 261     int64_t peak = ff_start_tag(s->pb, "levl");
 262     int64_t now0;
 263     time_t now_secs;
 264     char timestamp[28];
 265
 266     /* Peak frame of incomplete block at end */
 267     if (wav->peak_block_pos)
 268         peak_write_frame(s);
 269
 270     memset(timestamp, 0, sizeof(timestamp));
 271     if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
 272         struct tm tmpbuf;
 273         av_log(s, AV_LOG_INFO, "Writing local time and date to Peak Envelope Chunk\n");
 274         now0 = av_gettime();
 275         now_secs = now0 / 1000000;
 276         if (strftime(timestamp, sizeof(timestamp), "%Y:%m:%d:%H:%M:%S:", localtime_r(&now_secs, &tmpbuf))) {
 277             av_strlcatf(timestamp, sizeof(timestamp), "%03d", (int)((now0 / 1000) % 1000));
 278         } else {
 279             av_log(s, AV_LOG_ERROR, "Failed to write timestamp\n");
 280             return -1;
 281         }
 282     }
 283
 284     avio_wl32(pb, 1);                           /* version */
 285     avio_wl32(pb, wav->peak_format);            /* 8 or 16 bit */
 286     avio_wl32(pb, wav->peak_ppv);               /* positive and negative */
 287     avio_wl32(pb, wav->peak_block_size);        /* frames per value */
 288     avio_wl32(pb, par->channels);               /* number of channels */
 289     avio_wl32(pb, wav->peak_num_frames);        /* number of peak frames */
 290     avio_wl32(pb, wav->peak_pos_pop);           /* audio sample frame index */
 291     avio_wl32(pb, 128);                         /* equal to size of header */
 292     avio_write(pb, timestamp, 28);              /* ASCII time stamp */
 293     ffio_fill(pb, 0, 60);
 294
 295     avio_write(pb, wav->peak_output, wav->peak_outbuf_bytes);
 296
 297     ff_end_tag(pb, peak);
 298
 299     if (!wav->data)
 300         wav->data = peak;
 301
 302     return 0;
 303 }
 304
 305 static int wav_write_header(AVFormatContext *s)
 306 {
 307     WAVMuxContext *wav = s->priv_data;
 308     AVIOContext *pb = s->pb;
 309     int64_t fmt;
 310
 311     if (s->nb_streams != 1) {
 312         av_log(s, AV_LOG_ERROR, "WAVE files have exactly one stream\n");
 313         return AVERROR(EINVAL);
 314     }
 315
 316     if (wav->rf64 == RF64_ALWAYS) {
 317         ffio_wfourcc(pb, "RF64");
 318         avio_wl32(pb, -1); /* RF64 chunk size: use size in ds64 */
 319     } else {
 320         ffio_wfourcc(pb, "RIFF");
 321         avio_wl32(pb, -1); /* file length */
 322     }
 323
 324     ffio_wfourcc(pb, "WAVE");
 325
 326     if (wav->rf64 != RF64_NEVER) {
 327         /* write empty ds64 chunk or JUNK chunk to reserve space for ds64 */
 328         ffio_wfourcc(pb, wav->rf64 == RF64_ALWAYS ? "ds64" : "JUNK");
 329         avio_wl32(pb, 28); /* chunk size */
 330         wav->ds64 = avio_tell(pb);
 331         ffio_fill(pb, 0, 28);
 332     }
 333
 334     if (wav->write_peak != 2) {
 335         /* format header */
 336         fmt = ff_start_tag(pb, "fmt ");
 337         if (ff_put_wav_header(s, pb, s->streams[0]->codecpar, 0) < 0) {
 338             const AVCodecDescriptor *desc = avcodec_descriptor_get(s->streams[0]->codecpar->codec_id);
 339             av_log(s, AV_LOG_ERROR, "%s codec not supported in WAVE format\n",
 340                    desc ? desc->name : "unknown");
 341             return AVERROR(ENOSYS);
 342         }
 343         ff_end_tag(pb, fmt);
 344     }
 345
 346     if (s->streams[0]->codecpar->codec_tag != 0x01 /* hence for all other than PCM */
 347         && s->pb->seekable) {
 348         wav->fact_pos = ff_start_tag(pb, "fact");
 349         avio_wl32(pb, 0);
 350         ff_end_tag(pb, wav->fact_pos);
 351     }
 352
 353     if (wav->write_bext)
 354         bwf_write_bext_chunk(s);
 355
 356     if (wav->write_peak) {
 357         int ret;
 358         if ((ret = peak_init_writer(s)) < 0)
 359             return ret;
 360     }
 361
 362     avpriv_set_pts_info(s->streams[0], 64, 1, s->streams[0]->codecpar->sample_rate);
 363     wav->maxpts = wav->last_duration = 0;
 364     wav->minpts = INT64_MAX;
 365
 366     if (wav->write_peak != 2) {
 367         /* info header */
 368         ff_riff_write_info(s);
 369
 370         /* data header */
 371         wav->data = ff_start_tag(pb, "data");
 372     }
 373
 374     avio_flush(pb);
 375
 376     return 0;
 377 }
 378
 379 static int wav_write_packet(AVFormatContext *s, AVPacket *pkt)
 380 {
 381     AVIOContext *pb  = s->pb;
 382     WAVMuxContext    *wav = s->priv_data;
 383
 384     if (wav->write_peak != 2)
 385         avio_write(pb, pkt->data, pkt->size);
 386
 387     if (wav->write_peak) {
 388         int c = 0;
 389         int i;
 390         for (i = 0; i < pkt->size; i += wav->peak_bps) {
 391             if (wav->peak_bps == 1) {
 392                 wav->peak_maxpos[c] = FFMAX(wav->peak_maxpos[c], *(int8_t*)(pkt->data + i));
 393                 wav->peak_maxneg[c] = FFMIN(wav->peak_maxneg[c], *(int8_t*)(pkt->data + i));
 394             } else {
 395                 wav->peak_maxpos[c] = FFMAX(wav->peak_maxpos[c], (int16_t)AV_RL16(pkt->data + i));
 396                 wav->peak_maxneg[c] = FFMIN(wav->peak_maxneg[c], (int16_t)AV_RL16(pkt->data + i));
 397             }
 398             if (++c == s->streams[0]->codecpar->channels) {
 399                 c = 0;
 400                 if (++wav->peak_block_pos == wav->peak_block_size) {
 401                     peak_write_frame(s);
 402                     wav->peak_block_pos = 0;
 403                 }
 404             }
 405         }
 406     }
 407
 408     if(pkt->pts != AV_NOPTS_VALUE) {
 409         wav->minpts        = FFMIN(wav->minpts, pkt->pts);
 410         wav->maxpts        = FFMAX(wav->maxpts, pkt->pts);
 411         wav->last_duration = pkt->duration;
 412     } else
 413         av_log(s, AV_LOG_ERROR, "wav_write_packet: NOPTS\n");
 414     return 0;
 415 }
 416
 417 static int wav_write_trailer(AVFormatContext *s)
 418 {
 419     AVIOContext *pb  = s->pb;
 420     WAVMuxContext    *wav = s->priv_data;
 421     int64_t file_size, data_size;
 422     int64_t number_of_samples = 0;
 423     int rf64 = 0;
 424     int ret = 0;
 425
 426     avio_flush(pb);
 427
 428     if (s->pb->seekable) {
 429         if (wav->write_peak != 2 && avio_tell(pb) - wav->data < UINT32_MAX) {
 430             ff_end_tag(pb, wav->data);
 431             avio_flush(pb);
 432         }
 433
 434         if (wav->write_peak && wav->peak_output) {
 435             ret = peak_write_chunk(s);
 436             avio_flush(pb);
 437         }
 438
 439         /* update file size */
 440         file_size = avio_tell(pb);
 441         data_size = file_size - wav->data;
 442         if (wav->rf64 == RF64_ALWAYS || (wav->rf64 == RF64_AUTO && file_size - 8 > UINT32_MAX)) {
 443             rf64 = 1;
 444         } else if (file_size - 8 <= UINT32_MAX) {
 445             avio_seek(pb, 4, SEEK_SET);
 446             avio_wl32(pb, (uint32_t)(file_size - 8));
 447             avio_seek(pb, file_size, SEEK_SET);
 448
 449             avio_flush(pb);
 450         } else {
 451             av_log(s, AV_LOG_ERROR,
 452                    "Filesize %"PRId64" invalid for wav, output file will be broken\n",
 453                    file_size);
 454         }
 455
 456         number_of_samples = av_rescale(wav->maxpts - wav->minpts + wav->last_duration,
 457                                        s->streams[0]->codecpar->sample_rate * (int64_t)s->streams[0]->time_base.num,
 458                                        s->streams[0]->time_base.den);
 459
 460         if(s->streams[0]->codecpar->codec_tag != 0x01) {
 461             /* Update num_samps in fact chunk */
 462             avio_seek(pb, wav->fact_pos, SEEK_SET);
 463             if (rf64 || (wav->rf64 == RF64_AUTO && number_of_samples > UINT32_MAX)) {
 464                 rf64 = 1;
 465                 avio_wl32(pb, -1);
 466             } else {
 467                 avio_wl32(pb, number_of_samples);
 468                 avio_seek(pb, file_size, SEEK_SET);
 469                 avio_flush(pb);
 470             }
 471         }
 472
 473         if (rf64) {
 474             /* overwrite RIFF with RF64 */
 475             avio_seek(pb, 0, SEEK_SET);
 476             ffio_wfourcc(pb, "RF64");
 477             avio_wl32(pb, -1);
 478
 479             /* write ds64 chunk (overwrite JUNK if rf64 == RF64_AUTO) */
 480             avio_seek(pb, wav->ds64 - 8, SEEK_SET);
 481             ffio_wfourcc(pb, "ds64");
 482             avio_wl32(pb, 28);                  /* ds64 chunk size */
 483             avio_wl64(pb, file_size - 8);       /* RF64 chunk size */
 484             avio_wl64(pb, data_size);           /* data chunk size */
 485             avio_wl64(pb, number_of_samples);   /* fact chunk number of samples */
 486             avio_wl32(pb, 0);                   /* number of table entries for non-'data' chunks */
 487
 488             /* write -1 in data chunk size */
 489             avio_seek(pb, wav->data - 4, SEEK_SET);
 490             avio_wl32(pb, -1);
 491
 492             avio_seek(pb, file_size, SEEK_SET);
 493             avio_flush(pb);
 494         }
 495     }
 496
 497     if (wav->write_peak)
 498         peak_free_buffers(s);
 499
 500     return ret;
 501 }
 502
 503 #define OFFSET(x) offsetof(WAVMuxContext, x)
 504 #define ENC AV_OPT_FLAG_ENCODING_PARAM
 505 static const AVOption options[] = {
 506     { "write_bext", "Write BEXT chunk.", OFFSET(write_bext), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, ENC },
 507     { "write_peak", "Write Peak Envelope chunk.",            OFFSET(write_peak), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 2, ENC, "peak" },
 508     { "off",        "Do not write peak chunk.",              0,                  AV_OPT_TYPE_CONST, { .i64 = PEAK_OFF  }, 0, 0, ENC, "peak" },
 509     { "on",         "Append peak chunk after wav data.",     0,                  AV_OPT_TYPE_CONST, { .i64 = PEAK_ON   }, 0, 0, ENC, "peak" },
 510     { "only",       "Write only peak chunk, omit wav data.", 0,                  AV_OPT_TYPE_CONST, { .i64 = PEAK_ONLY }, 0, 0, ENC, "peak" },
 511     { "rf64",       "Use RF64 header rather than RIFF for large files.",    OFFSET(rf64), AV_OPT_TYPE_INT,   { .i64 = RF64_NEVER  },-1, 1, ENC, "rf64" },
 512     { "auto",       "Write RF64 header if file grows large enough.",        0,            AV_OPT_TYPE_CONST, { .i64 = RF64_AUTO   }, 0, 0, ENC, "rf64" },
 513     { "always",     "Always write RF64 header regardless of file size.",    0,            AV_OPT_TYPE_CONST, { .i64 = RF64_ALWAYS }, 0, 0, ENC, "rf64" },
 514     { "never",      "Never write RF64 header regardless of file size.",     0,            AV_OPT_TYPE_CONST, { .i64 = RF64_NEVER  }, 0, 0, ENC, "rf64" },
 515     { "peak_block_size", "Number of audio samples used to generate each peak frame.",   OFFSET(peak_block_size), AV_OPT_TYPE_INT, { .i64 = 256 }, 0, 65536, ENC },
 516     { "peak_format",     "The format of the peak envelope data (1: uint8, 2: uint16).", OFFSET(peak_format), AV_OPT_TYPE_INT,     { .i64 = PEAK_FORMAT_UINT16 }, PEAK_FORMAT_UINT8, PEAK_FORMAT_UINT16, ENC },
 517     { "peak_ppv",        "Number of peak points per peak value (1 or 2).",              OFFSET(peak_ppv), AV_OPT_TYPE_INT, { .i64 = 2 }, 1, 2, ENC },
 518     { NULL },
 519 };
 520
 521 static const AVClass wav_muxer_class = {
 522     .class_name = "WAV muxer",
 523     .item_name  = av_default_item_name,
 524     .option     = options,
 525     .version    = LIBAVUTIL_VERSION_INT,
 526 };
 527
 528 AVOutputFormat ff_wav_muxer = {
 529     .name              = "wav",
 530     .long_name         = NULL_IF_CONFIG_SMALL("WAV / WAVE (Waveform Audio)"),
 531     .mime_type         = "audio/x-wav",
 532     .extensions        = "wav",
 533     .priv_data_size    = sizeof(WAVMuxContext),
 534     .audio_codec       = AV_CODEC_ID_PCM_S16LE,
 535     .video_codec       = AV_CODEC_ID_NONE,
 536     .write_header      = wav_write_header,
 537     .write_packet      = wav_write_packet,
 538     .write_trailer     = wav_write_trailer,
 539     .flags             = AVFMT_TS_NONSTRICT,
 540     .codec_tag         = (const AVCodecTag* const []){ ff_codec_wav_tags, 0 },
 541     .priv_class        = &wav_muxer_class,
 542 };
 543 #endif /* CONFIG_WAV_MUXER */
 544
 545 #if CONFIG_W64_MUXER
 546 #include "w64.h"
 547
 548 static void start_guid(AVIOContext *pb, const uint8_t *guid, int64_t *pos)
 549 {
 550     *pos = avio_tell(pb);
 551
 552     avio_write(pb, guid, 16);
 553     avio_wl64(pb, INT64_MAX);
 554 }
 555
 556 static void end_guid(AVIOContext *pb, int64_t start)
 557 {
 558     int64_t end, pos = avio_tell(pb);
 559
 560     end = FFALIGN(pos, 8);
 561     ffio_fill(pb, 0, end - pos);
 562     avio_seek(pb, start + 16, SEEK_SET);
 563     avio_wl64(pb, end - start);
 564     avio_seek(pb, end, SEEK_SET);
 565 }
 566
 567 static int w64_write_header(AVFormatContext *s)
 568 {
 569     WAVMuxContext *wav = s->priv_data;
 570     AVIOContext *pb = s->pb;
 571     int64_t start;
 572     int ret;
 573
 574     avio_write(pb, ff_w64_guid_riff, sizeof(ff_w64_guid_riff));
 575     avio_wl64(pb, -1);
 576     avio_write(pb, ff_w64_guid_wave, sizeof(ff_w64_guid_wave));
 577     start_guid(pb, ff_w64_guid_fmt, &start);
 578     if ((ret = ff_put_wav_header(s, pb, s->streams[0]->codecpar, 0)) < 0) {
 579         AVCodec *codec = avcodec_find_decoder(s->streams[0]->codecpar->codec_id);
 580         av_log(s, AV_LOG_ERROR, "%s codec not supported\n",
 581                codec ? codec->name : "NONE");
 582         return ret;
 583     }
 584     end_guid(pb, start);
 585
 586     if (s->streams[0]->codecpar->codec_tag != 0x01 /* hence for all other than PCM */
 587         && s->pb->seekable) {
 588         start_guid(pb, ff_w64_guid_fact, &wav->fact_pos);
 589         avio_wl64(pb, 0);
 590         end_guid(pb, wav->fact_pos);
 591     }
 592
 593     start_guid(pb, ff_w64_guid_data, &wav->data);
 594
 595     return 0;
 596 }
 597
 598 static int w64_write_trailer(AVFormatContext *s)
 599 {
 600     AVIOContext    *pb = s->pb;
 601     WAVMuxContext *wav = s->priv_data;
 602     int64_t file_size;
 603
 604     if (pb->seekable) {
 605         end_guid(pb, wav->data);
 606
 607         file_size = avio_tell(pb);
 608         avio_seek(pb, 16, SEEK_SET);
 609         avio_wl64(pb, file_size);
 610
 611         if (s->streams[0]->codecpar->codec_tag != 0x01) {
 612             int64_t number_of_samples;
 613
 614             number_of_samples = av_rescale(wav->maxpts - wav->minpts + wav->last_duration,
 615                                            s->streams[0]->codecpar->sample_rate * (int64_t)s->streams[0]->time_base.num,
 616                                            s->streams[0]->time_base.den);
 617             avio_seek(pb, wav->fact_pos + 24, SEEK_SET);
 618             avio_wl64(pb, number_of_samples);
 619         }
 620
 621         avio_seek(pb, file_size, SEEK_SET);
 622         avio_flush(pb);
 623     }
 624
 625     return 0;
 626 }
 627
 628 AVOutputFormat ff_w64_muxer = {
 629     .name              = "w64",
 630     .long_name         = NULL_IF_CONFIG_SMALL("Sony Wave64"),
 631     .extensions        = "w64",
 632     .priv_data_size    = sizeof(WAVMuxContext),
 633     .audio_codec       = AV_CODEC_ID_PCM_S16LE,
 634     .video_codec       = AV_CODEC_ID_NONE,
 635     .write_header      = w64_write_header,
 636     .write_packet      = wav_write_packet,
 637     .write_trailer     = w64_write_trailer,
 638     .flags             = AVFMT_TS_NONSTRICT,
 639     .codec_tag         = (const AVCodecTag* const []){ ff_codec_wav_tags, 0 },
 640 };
 641 #endif /* CONFIG_W64_MUXER */