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