libavformat/raw.c

   1 /*
   2  * RAW muxer and demuxer
   3  * Copyright (c) 2001 Fabrice Bellard
   4  * Copyright (c) 2005 Alex Beregszaszi
   5  *
   6  * This file is part of FFmpeg.
   7  *
   8  * FFmpeg is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * FFmpeg is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with FFmpeg; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21  */
  22
  23 #include "libavutil/crc.h"
  24 #include "libavcodec/ac3_parser.h"
  25 #include "libavcodec/bitstream.h"
  26 #include "libavcodec/bytestream.h"
  27 #include "avformat.h"
  28 #include "raw.h"
  29 #include "id3v2.h"
  30
  31 /* simple formats */
  32 #if CONFIG_FLAC_MUXER
  33 static int flac_write_header(struct AVFormatContext *s)
  34 {
  35     static const uint8_t header[8] = {
  36         0x66, 0x4C, 0x61, 0x43, 0x80, 0x00, 0x00, 0x22
  37     };
  38     uint8_t *streaminfo = s->streams[0]->codec->extradata;
  39     int len = s->streams[0]->codec->extradata_size;
  40     if(streaminfo != NULL && len > 0) {
  41         put_buffer(s->pb, header, 8);
  42         put_buffer(s->pb, streaminfo, len);
  43     }
  44     return 0;
  45 }
  46
  47 static int flac_write_trailer(struct AVFormatContext *s)
  48 {
  49     ByteIOContext *pb = s->pb;
  50     uint8_t *streaminfo = s->streams[0]->codec->extradata;
  51     int len = s->streams[0]->codec->extradata_size;
  52     int64_t file_size;
  53
  54     if (streaminfo && len > 0 && !url_is_streamed(s->pb)) {
  55         file_size = url_ftell(pb);
  56         url_fseek(pb, 8, SEEK_SET);
  57         put_buffer(pb, streaminfo, len);
  58         url_fseek(pb, file_size, SEEK_SET);
  59         put_flush_packet(pb);
  60     }
  61     return 0;
  62 }
  63 #endif
  64
  65 #if CONFIG_ROQ_MUXER
  66 static int roq_write_header(struct AVFormatContext *s)
  67 {
  68     static const uint8_t header[] = {
  69         0x84, 0x10, 0xFF, 0xFF, 0xFF, 0xFF, 0x1E, 0x00
  70     };
  71
  72     put_buffer(s->pb, header, 8);
  73     put_flush_packet(s->pb);
  74
  75     return 0;
  76 }
  77 #endif
  78
  79 #if CONFIG_NULL_MUXER
  80 static int null_write_packet(struct AVFormatContext *s, AVPacket *pkt)
  81 {
  82     return 0;
  83 }
  84 #endif
  85
  86 #if CONFIG_MUXERS
  87 static int raw_write_packet(struct AVFormatContext *s, AVPacket *pkt)
  88 {
  89     put_buffer(s->pb, pkt->data, pkt->size);
  90     put_flush_packet(s->pb);
  91     return 0;
  92 }
  93 #endif
  94
  95 #if CONFIG_DEMUXERS
  96 /* raw input */
  97 static int raw_read_header(AVFormatContext *s, AVFormatParameters *ap)
  98 {
  99     AVStream *st;
 100     int id;
 101
 102     st = av_new_stream(s, 0);
 103     if (!st)
 104         return AVERROR(ENOMEM);
 105
 106         id = s->iformat->value;
 107         if (id == CODEC_ID_RAWVIDEO) {
 108             st->codec->codec_type = CODEC_TYPE_VIDEO;
 109         } else {
 110             st->codec->codec_type = CODEC_TYPE_AUDIO;
 111         }
 112         st->codec->codec_id = id;
 113
 114         switch(st->codec->codec_type) {
 115         case CODEC_TYPE_AUDIO:
 116             st->codec->sample_rate = ap->sample_rate;
 117             if(ap->channels) st->codec->channels = ap->channels;
 118             else             st->codec->channels = 1;
 119             av_set_pts_info(st, 64, 1, st->codec->sample_rate);
 120             break;
 121         case CODEC_TYPE_VIDEO:
 122             if(ap->time_base.num)
 123                 av_set_pts_info(st, 64, ap->time_base.num, ap->time_base.den);
 124             else
 125                 av_set_pts_info(st, 64, 1, 25);
 126             st->codec->width = ap->width;
 127             st->codec->height = ap->height;
 128             st->codec->pix_fmt = ap->pix_fmt;
 129             if(st->codec->pix_fmt == PIX_FMT_NONE)
 130                 st->codec->pix_fmt= PIX_FMT_YUV420P;
 131             break;
 132         default:
 133             return -1;
 134         }
 135     return 0;
 136 }
 137
 138 #define RAW_PACKET_SIZE 1024
 139
 140 static int raw_read_packet(AVFormatContext *s, AVPacket *pkt)
 141 {
 142     int ret, size, bps;
 143     //    AVStream *st = s->streams[0];
 144
 145     size= RAW_PACKET_SIZE;
 146
 147     ret= av_get_packet(s->pb, pkt, size);
 148
 149     pkt->stream_index = 0;
 150     if (ret <= 0) {
 151         return AVERROR(EIO);
 152     }
 153     /* note: we need to modify the packet size here to handle the last
 154        packet */
 155     pkt->size = ret;
 156
 157     bps= av_get_bits_per_sample(s->streams[0]->codec->codec_id);
 158     assert(bps); // if false there IS a bug elsewhere (NOT in this function)
 159     pkt->dts=
 160     pkt->pts= pkt->pos*8 / (bps * s->streams[0]->codec->channels);
 161
 162     return ret;
 163 }
 164
 165 static int raw_read_partial_packet(AVFormatContext *s, AVPacket *pkt)
 166 {
 167     int ret, size;
 168
 169     size = RAW_PACKET_SIZE;
 170
 171     if (av_new_packet(pkt, size) < 0)
 172         return AVERROR(EIO);
 173
 174     pkt->pos= url_ftell(s->pb);
 175     pkt->stream_index = 0;
 176     ret = get_partial_buffer(s->pb, pkt->data, size);
 177     if (ret <= 0) {
 178         av_free_packet(pkt);
 179         return AVERROR(EIO);
 180     }
 181     pkt->size = ret;
 182     return ret;
 183 }
 184 #endif
 185
 186 #if CONFIG_RAWVIDEO_DEMUXER
 187 static int rawvideo_read_packet(AVFormatContext *s, AVPacket *pkt)
 188 {
 189     int packet_size, ret, width, height;
 190     AVStream *st = s->streams[0];
 191
 192     width = st->codec->width;
 193     height = st->codec->height;
 194
 195     packet_size = avpicture_get_size(st->codec->pix_fmt, width, height);
 196     if (packet_size < 0)
 197         return -1;
 198
 199     ret= av_get_packet(s->pb, pkt, packet_size);
 200     pkt->pts=
 201     pkt->dts= pkt->pos / packet_size;
 202
 203     pkt->stream_index = 0;
 204     if (ret != packet_size) {
 205         return AVERROR(EIO);
 206     } else {
 207         return 0;
 208     }
 209 }
 210 #endif
 211
 212 #if CONFIG_INGENIENT_DEMUXER
 213 // http://www.artificis.hu/files/texts/ingenient.txt
 214 static int ingenient_read_packet(AVFormatContext *s, AVPacket *pkt)
 215 {
 216     int ret, size, w, h, unk1, unk2;
 217
 218     if (get_le32(s->pb) != MKTAG('M', 'J', 'P', 'G'))
 219         return AVERROR(EIO); // FIXME
 220
 221     size = get_le32(s->pb);
 222
 223     w = get_le16(s->pb);
 224     h = get_le16(s->pb);
 225
 226     url_fskip(s->pb, 8); // zero + size (padded?)
 227     url_fskip(s->pb, 2);
 228     unk1 = get_le16(s->pb);
 229     unk2 = get_le16(s->pb);
 230     url_fskip(s->pb, 22); // ASCII timestamp
 231
 232     av_log(s, AV_LOG_DEBUG, "Ingenient packet: size=%d, width=%d, height=%d, unk1=%d unk2=%d\n",
 233         size, w, h, unk1, unk2);
 234
 235     if (av_new_packet(pkt, size) < 0)
 236         return AVERROR(EIO);
 237
 238     pkt->pos = url_ftell(s->pb);
 239     pkt->stream_index = 0;
 240     ret = get_buffer(s->pb, pkt->data, size);
 241     if (ret <= 0) {
 242         av_free_packet(pkt);
 243         return AVERROR(EIO);
 244     }
 245     pkt->size = ret;
 246     return ret;
 247 }
 248 #endif
 249
 250 #if CONFIG_DEMUXERS
 251 int pcm_read_seek(AVFormatContext *s,
 252                   int stream_index, int64_t timestamp, int flags)
 253 {
 254     AVStream *st;
 255     int block_align, byte_rate, ret;
 256     int64_t pos;
 257
 258     st = s->streams[0];
 259
 260     block_align = st->codec->block_align ? st->codec->block_align :
 261         (av_get_bits_per_sample(st->codec->codec_id) * st->codec->channels) >> 3;
 262     byte_rate = st->codec->bit_rate ? st->codec->bit_rate >> 3 :
 263         block_align * st->codec->sample_rate;
 264
 265     if (block_align <= 0 || byte_rate <= 0)
 266         return -1;
 267
 268     /* compute the position by aligning it to block_align */
 269     pos = av_rescale_rnd(timestamp * byte_rate,
 270                          st->time_base.num,
 271                          st->time_base.den * (int64_t)block_align,
 272                          (flags & AVSEEK_FLAG_BACKWARD) ? AV_ROUND_DOWN : AV_ROUND_UP);
 273     pos *= block_align;
 274
 275     /* recompute exact position */
 276     st->cur_dts = av_rescale(pos, st->time_base.den, byte_rate * (int64_t)st->time_base.num);
 277     if ((ret = url_fseek(s->pb, pos + s->data_offset, SEEK_SET)) < 0)
 278         return ret;
 279     return 0;
 280 }
 281
 282 static int audio_read_header(AVFormatContext *s,
 283                              AVFormatParameters *ap)
 284 {
 285     AVStream *st = av_new_stream(s, 0);
 286     if (!st)
 287         return AVERROR(ENOMEM);
 288     st->codec->codec_type = CODEC_TYPE_AUDIO;
 289     st->codec->codec_id = s->iformat->value;
 290     st->need_parsing = AVSTREAM_PARSE_FULL;
 291     /* the parameters will be extracted from the compressed bitstream */
 292
 293     if(st->codec->codec_id == CODEC_ID_FLAC) {
 294         /* skip ID3v2 header if found */
 295         uint8_t buf[ID3v2_HEADER_SIZE];
 296         int ret = get_buffer(s->pb, buf, ID3v2_HEADER_SIZE);
 297         if (ret == ID3v2_HEADER_SIZE && ff_id3v2_match(buf)) {
 298             int len = ff_id3v2_tag_len(buf);
 299             url_fseek(s->pb, len - ID3v2_HEADER_SIZE, SEEK_CUR);
 300         } else {
 301             url_fseek(s->pb, 0, SEEK_SET);
 302         }
 303     }
 304     return 0;
 305 }
 306
 307 /* MPEG-1/H.263 input */
 308 static int video_read_header(AVFormatContext *s,
 309                              AVFormatParameters *ap)
 310 {
 311     AVStream *st;
 312
 313     st = av_new_stream(s, 0);
 314     if (!st)
 315         return AVERROR(ENOMEM);
 316
 317     st->codec->codec_type = CODEC_TYPE_VIDEO;
 318     st->codec->codec_id = s->iformat->value;
 319     st->need_parsing = AVSTREAM_PARSE_FULL;
 320
 321     /* for MJPEG, specify frame rate */
 322     /* for MPEG-4 specify it, too (most MPEG-4 streams do not have the fixed_vop_rate set ...)*/
 323     if (ap->time_base.num) {
 324         av_set_pts_info(st, 64, ap->time_base.num, ap->time_base.den);
 325     } else if ( st->codec->codec_id == CODEC_ID_MJPEG ||
 326                 st->codec->codec_id == CODEC_ID_MPEG4 ||
 327                 st->codec->codec_id == CODEC_ID_DIRAC ||
 328                 st->codec->codec_id == CODEC_ID_H264) {
 329         av_set_pts_info(st, 64, 1, 25);
 330     }
 331
 332     return 0;
 333 }
 334 #endif
 335
 336 #if CONFIG_MPEGVIDEO_DEMUXER
 337 #define SEQ_START_CODE          0x000001b3
 338 #define GOP_START_CODE          0x000001b8
 339 #define PICTURE_START_CODE      0x00000100
 340 #define SLICE_START_CODE        0x00000101
 341 #define PACK_START_CODE         0x000001ba
 342 #define VIDEO_ID                0x000001e0
 343 #define AUDIO_ID                0x000001c0
 344
 345 static int mpegvideo_probe(AVProbeData *p)
 346 {
 347     uint32_t code= -1;
 348     int pic=0, seq=0, slice=0, pspack=0, pes=0;
 349     int i;
 350
 351     for(i=0; i<p->buf_size; i++){
 352         code = (code<<8) + p->buf[i];
 353         if ((code & 0xffffff00) == 0x100) {
 354             switch(code){
 355             case     SEQ_START_CODE:   seq++; break;
 356             case PICTURE_START_CODE:   pic++; break;
 357             case   SLICE_START_CODE: slice++; break;
 358             case    PACK_START_CODE: pspack++; break;
 359             }
 360             if     ((code & 0x1f0) == VIDEO_ID)   pes++;
 361             else if((code & 0x1e0) == AUDIO_ID)   pes++;
 362         }
 363     }
 364     if(seq && seq*9<=pic*10 && pic*9<=slice*10 && !pspack && !pes)
 365         return AVPROBE_SCORE_MAX/2+1; // +1 for .mpg
 366     return 0;
 367 }
 368
 369 #define CAVS_SEQ_START_CODE       0x000001b0
 370 #define CAVS_PIC_I_START_CODE     0x000001b3
 371 #define CAVS_UNDEF_START_CODE     0x000001b4
 372 #define CAVS_PIC_PB_START_CODE    0x000001b6
 373 #define CAVS_VIDEO_EDIT_CODE      0x000001b7
 374 #define CAVS_PROFILE_JIZHUN       0x20
 375
 376 static int cavsvideo_probe(AVProbeData *p)
 377 {
 378     uint32_t code= -1;
 379     int pic=0, seq=0, slice_pos = 0;
 380     int i;
 381
 382     for(i=0; i<p->buf_size; i++){
 383         code = (code<<8) + p->buf[i];
 384         if ((code & 0xffffff00) == 0x100) {
 385             if(code < CAVS_SEQ_START_CODE) {
 386                 /* slices have to be consecutive */
 387                 if(code < slice_pos)
 388                     return 0;
 389                 slice_pos = code;
 390             } else {
 391                 slice_pos = 0;
 392             }
 393             if (code == CAVS_SEQ_START_CODE) {
 394                 seq++;
 395                 /* check for the only currently supported profile */
 396                 if(p->buf[i+1] != CAVS_PROFILE_JIZHUN)
 397                     return 0;
 398             } else if ((code == CAVS_PIC_I_START_CODE) ||
 399                        (code == CAVS_PIC_PB_START_CODE)) {
 400                 pic++;
 401             } else if ((code == CAVS_UNDEF_START_CODE) ||
 402                        (code >  CAVS_VIDEO_EDIT_CODE)) {
 403                 return 0;
 404             }
 405         }
 406     }
 407     if(seq && seq*9<=pic*10)
 408         return AVPROBE_SCORE_MAX/2;
 409     return 0;
 410 }
 411 #endif
 412
 413 #if CONFIG_M4V_DEMUXER
 414 #define VISUAL_OBJECT_START_CODE       0x000001b5
 415 #define VOP_START_CODE                 0x000001b6
 416
 417 static int mpeg4video_probe(AVProbeData *probe_packet)
 418 {
 419     uint32_t temp_buffer= -1;
 420     int VO=0, VOL=0, VOP = 0, VISO = 0, res=0;
 421     int i;
 422
 423     for(i=0; i<probe_packet->buf_size; i++){
 424         temp_buffer = (temp_buffer<<8) + probe_packet->buf[i];
 425         if ((temp_buffer & 0xffffff00) != 0x100)
 426             continue;
 427
 428         if (temp_buffer == VOP_START_CODE)                         VOP++;
 429         else if (temp_buffer == VISUAL_OBJECT_START_CODE)          VISO++;
 430         else if (temp_buffer < 0x120)                              VO++;
 431         else if (temp_buffer < 0x130)                              VOL++;
 432         else if (   !(0x1AF < temp_buffer && temp_buffer < 0x1B7)
 433                  && !(0x1B9 < temp_buffer && temp_buffer < 0x1C4)) res++;
 434     }
 435
 436     if ( VOP >= VISO && VOP >= VOL && VO >= VOL && VOL > 0 && res==0)
 437         return AVPROBE_SCORE_MAX/2;
 438     return 0;
 439 }
 440 #endif
 441
 442 #if CONFIG_H264_DEMUXER
 443 static int h264_probe(AVProbeData *p)
 444 {
 445     uint32_t code= -1;
 446     int sps=0, pps=0, idr=0, res=0, sli=0;
 447     int i;
 448
 449     for(i=0; i<p->buf_size; i++){
 450         code = (code<<8) + p->buf[i];
 451         if ((code & 0xffffff00) == 0x100) {
 452             int ref_idc= (code>>5)&3;
 453             int type   = code & 0x1F;
 454             static const int8_t ref_zero[32]={
 455                 2, 0, 0, 0, 0,-1, 1,-1,
 456                -1, 1, 1, 1, 1,-1, 2, 2,
 457                 2, 2, 2, 0, 2, 2, 2, 2,
 458                 2, 2, 2, 2, 2, 2, 2, 2
 459             };
 460
 461             if(code & 0x80) //forbidden bit
 462                 return 0;
 463
 464             if(ref_zero[type] == 1 && ref_idc)
 465                 return 0;
 466             if(ref_zero[type] ==-1 && !ref_idc)
 467                 return 0;
 468             if(ref_zero[type] == 2)
 469                 res++;
 470
 471             switch(type){
 472             case     1:   sli++; break;
 473             case     5:   idr++; break;
 474             case     7:
 475                 if(p->buf[i+2]&0x0F)
 476                     return 0;
 477                 sps++;
 478                 break;
 479             case     8:   pps++; break;
 480             }
 481         }
 482     }
 483     if(sps && pps && (idr||sli>3) && res<(sps+pps+idr))
 484         return AVPROBE_SCORE_MAX/2+1; // +1 for .mpg
 485     return 0;
 486 }
 487 #endif
 488
 489 #if CONFIG_H263_DEMUXER
 490 static int h263_probe(AVProbeData *p)
 491 {
 492     int code;
 493     const uint8_t *d;
 494
 495     d = p->buf;
 496     code = (d[0] << 14) | (d[1] << 6) | (d[2] >> 2);
 497     if (code == 0x20) {
 498         return 50;
 499     }
 500     return 0;
 501 }
 502 #endif
 503
 504 #if CONFIG_H261_DEMUXER
 505 static int h261_probe(AVProbeData *p)
 506 {
 507     int code;
 508     const uint8_t *d;
 509
 510     d = p->buf;
 511     code = (d[0] << 12) | (d[1] << 4) | (d[2] >> 4);
 512     if (code == 0x10) {
 513         return 50;
 514     }
 515     return 0;
 516 }
 517 #endif
 518
 519 #if CONFIG_DTS_DEMUXER
 520 #define DCA_MARKER_14B_BE 0x1FFFE800
 521 #define DCA_MARKER_14B_LE 0xFF1F00E8
 522 #define DCA_MARKER_RAW_BE 0x7FFE8001
 523 #define DCA_MARKER_RAW_LE 0xFE7F0180
 524 static int dts_probe(AVProbeData *p)
 525 {
 526     const uint8_t *buf, *bufp;
 527     uint32_t state = -1;
 528
 529     buf = p->buf;
 530
 531     for(; buf < (p->buf+p->buf_size)-2; buf+=2) {
 532         bufp = buf;
 533         state = (state << 16) | bytestream_get_be16(&bufp);
 534
 535         /* regular bitstream */
 536         if (state == DCA_MARKER_RAW_BE || state == DCA_MARKER_RAW_LE)
 537             return AVPROBE_SCORE_MAX/2+1;
 538
 539         /* 14 bits big-endian bitstream */
 540         if (state == DCA_MARKER_14B_BE)
 541             if ((bytestream_get_be16(&bufp) & 0xFFF0) == 0x07F0)
 542                 return AVPROBE_SCORE_MAX/2+1;
 543
 544         /* 14 bits little-endian bitstream */
 545         if (state == DCA_MARKER_14B_LE)
 546             if ((bytestream_get_be16(&bufp) & 0xF0FF) == 0xF007)
 547                 return AVPROBE_SCORE_MAX/2+1;
 548     }
 549
 550     return 0;
 551 }
 552 #endif
 553
 554 #if CONFIG_DIRAC_DEMUXER
 555 static int dirac_probe(AVProbeData *p)
 556 {
 557     if (AV_RL32(p->buf) == MKTAG('B', 'B', 'C', 'D'))
 558         return AVPROBE_SCORE_MAX;
 559     else
 560         return 0;
 561 }
 562 #endif
 563
 564 #if CONFIG_DNXHD_DEMUXER
 565 static int dnxhd_probe(AVProbeData *p)
 566 {
 567     static const uint8_t header[] = {0x00,0x00,0x02,0x80,0x01};
 568     if (!memcmp(p->buf, header, 5))
 569         return AVPROBE_SCORE_MAX;
 570     else
 571         return 0;
 572 }
 573 #endif
 574
 575 #if CONFIG_AC3_DEMUXER || CONFIG_EAC3_DEMUXER
 576 static int ac3_eac3_probe(AVProbeData *p, enum CodecID expected_codec_id)
 577 {
 578     int max_frames, first_frames = 0, frames;
 579     uint8_t *buf, *buf2, *end;
 580     AC3HeaderInfo hdr;
 581     GetBitContext gbc;
 582     enum CodecID codec_id = CODEC_ID_AC3;
 583
 584     max_frames = 0;
 585     buf = p->buf;
 586     end = buf + p->buf_size;
 587
 588     for(; buf < end; buf++) {
 589         buf2 = buf;
 590
 591         for(frames = 0; buf2 < end; frames++) {
 592             init_get_bits(&gbc, buf2, 54);
 593             if(ff_ac3_parse_header(&gbc, &hdr) < 0)
 594                 break;
 595             if(buf2 + hdr.frame_size > end ||
 596                av_crc(av_crc_get_table(AV_CRC_16_ANSI), 0, buf2 + 2, hdr.frame_size - 2))
 597                 break;
 598             if (hdr.bitstream_id > 10)
 599                 codec_id = CODEC_ID_EAC3;
 600             buf2 += hdr.frame_size;
 601         }
 602         max_frames = FFMAX(max_frames, frames);
 603         if(buf == p->buf)
 604             first_frames = frames;
 605     }
 606     if(codec_id != expected_codec_id) return 0;
 607     if   (first_frames>=3) return AVPROBE_SCORE_MAX * 3 / 4;
 608     else if(max_frames>=3) return AVPROBE_SCORE_MAX / 2;
 609     else if(max_frames>=1) return 1;
 610     else                   return 0;
 611 }
 612 #endif
 613
 614 #if CONFIG_AC3_DEMUXER
 615 static int ac3_probe(AVProbeData *p)
 616 {
 617     return ac3_eac3_probe(p, CODEC_ID_AC3);
 618 }
 619 #endif
 620
 621 #if CONFIG_EAC3_DEMUXER
 622 static int eac3_probe(AVProbeData *p)
 623 {
 624     return ac3_eac3_probe(p, CODEC_ID_EAC3);
 625 }
 626 #endif
 627
 628 #if CONFIG_FLAC_DEMUXER
 629 static int flac_probe(AVProbeData *p)
 630 {
 631     uint8_t *bufptr = p->buf;
 632     uint8_t *end    = p->buf + p->buf_size;
 633
 634     if(ff_id3v2_match(bufptr))
 635         bufptr += ff_id3v2_tag_len(bufptr);
 636
 637     if(bufptr > end-4 || memcmp(bufptr, "fLaC", 4)) return 0;
 638     else                                            return AVPROBE_SCORE_MAX/2;
 639 }
 640 #endif
 641
 642 #if CONFIG_AAC_DEMUXER
 643 static int adts_aac_probe(AVProbeData *p)
 644 {
 645     int max_frames = 0, first_frames = 0;
 646     int fsize, frames;
 647     uint8_t *buf0 = p->buf;
 648     uint8_t *buf2;
 649     uint8_t *buf;
 650     uint8_t *end = buf0 + p->buf_size - 7;
 651
 652     if (ff_id3v2_match(buf0)) {
 653         buf0 += ff_id3v2_tag_len(buf0);
 654     }
 655     buf = buf0;
 656
 657     for(; buf < end; buf= buf2+1) {
 658         buf2 = buf;
 659
 660         for(frames = 0; buf2 < end; frames++) {
 661             uint32_t header = AV_RB16(buf2);
 662             if((header&0xFFF6) != 0xFFF0)
 663                 break;
 664             fsize = (AV_RB32(buf2+3)>>13) & 0x8FFF;
 665             if(fsize < 7)
 666                 break;
 667             buf2 += fsize;
 668         }
 669         max_frames = FFMAX(max_frames, frames);
 670         if(buf == buf0)
 671             first_frames= frames;
 672     }
 673     if   (first_frames>=3) return AVPROBE_SCORE_MAX/2+1;
 674     else if(max_frames>500)return AVPROBE_SCORE_MAX/2;
 675     else if(max_frames>=3) return AVPROBE_SCORE_MAX/4;
 676     else if(max_frames>=1) return 1;
 677     else                   return 0;
 678 }
 679 #endif
 680
 681 /* Note: Do not forget to add new entries to the Makefile as well. */
 682
 683 #if CONFIG_AAC_DEMUXER
 684 AVInputFormat aac_demuxer = {
 685     "aac",
 686     NULL_IF_CONFIG_SMALL("raw ADTS AAC"),
 687     0,
 688     adts_aac_probe,
 689     audio_read_header,
 690     raw_read_partial_packet,
 691     .flags= AVFMT_GENERIC_INDEX,
 692     .extensions = "aac",
 693     .value = CODEC_ID_AAC,
 694 };
 695 #endif
 696
 697 #if CONFIG_AC3_DEMUXER
 698 AVInputFormat ac3_demuxer = {
 699     "ac3",
 700     NULL_IF_CONFIG_SMALL("raw AC-3"),
 701     0,
 702     ac3_probe,
 703     audio_read_header,
 704     raw_read_partial_packet,
 705     .flags= AVFMT_GENERIC_INDEX,
 706     .extensions = "ac3",
 707     .value = CODEC_ID_AC3,
 708 };
 709 #endif
 710
 711 #if CONFIG_AC3_MUXER
 712 AVOutputFormat ac3_muxer = {
 713     "ac3",
 714     NULL_IF_CONFIG_SMALL("raw AC-3"),
 715     "audio/x-ac3",
 716     "ac3",
 717     0,
 718     CODEC_ID_AC3,
 719     CODEC_ID_NONE,
 720     NULL,
 721     raw_write_packet,
 722     .flags= AVFMT_NOTIMESTAMPS,
 723 };
 724 #endif
 725
 726 #if CONFIG_DIRAC_DEMUXER
 727 AVInputFormat dirac_demuxer = {
 728     "dirac",
 729     NULL_IF_CONFIG_SMALL("raw Dirac"),
 730     0,
 731     dirac_probe,
 732     video_read_header,
 733     raw_read_partial_packet,
 734     .flags= AVFMT_GENERIC_INDEX,
 735     .value = CODEC_ID_DIRAC,
 736 };
 737 #endif
 738
 739 #if CONFIG_DIRAC_MUXER
 740 AVOutputFormat dirac_muxer = {
 741     "dirac",
 742     NULL_IF_CONFIG_SMALL("raw Dirac"),
 743     NULL,
 744     "drc",
 745     0,
 746     CODEC_ID_NONE,
 747     CODEC_ID_DIRAC,
 748     NULL,
 749     raw_write_packet,
 750     .flags= AVFMT_NOTIMESTAMPS,
 751 };
 752 #endif
 753
 754 #if CONFIG_DNXHD_DEMUXER
 755 AVInputFormat dnxhd_demuxer = {
 756     "dnxhd",
 757     NULL_IF_CONFIG_SMALL("raw DNxHD (SMPTE VC-3)"),
 758     0,
 759     dnxhd_probe,
 760     video_read_header,
 761     raw_read_partial_packet,
 762     .flags= AVFMT_GENERIC_INDEX,
 763     .value = CODEC_ID_DNXHD,
 764 };
 765 #endif
 766
 767 #if CONFIG_DNXHD_MUXER
 768 AVOutputFormat dnxhd_muxer = {
 769     "dnxhd",
 770     NULL_IF_CONFIG_SMALL("raw DNxHD (SMPTE VC-3)"),
 771     NULL,
 772     "dnxhd",
 773     0,
 774     CODEC_ID_NONE,
 775     CODEC_ID_DNXHD,
 776     NULL,
 777     raw_write_packet,
 778     .flags= AVFMT_NOTIMESTAMPS,
 779 };
 780 #endif
 781
 782 #if CONFIG_DTS_DEMUXER
 783 AVInputFormat dts_demuxer = {
 784     "dts",
 785     NULL_IF_CONFIG_SMALL("raw DTS"),
 786     0,
 787     dts_probe,
 788     audio_read_header,
 789     raw_read_partial_packet,
 790     .flags= AVFMT_GENERIC_INDEX,
 791     .extensions = "dts",
 792     .value = CODEC_ID_DTS,
 793 };
 794 #endif
 795
 796 #if CONFIG_DTS_MUXER
 797 AVOutputFormat dts_muxer = {
 798     "dts",
 799     NULL_IF_CONFIG_SMALL("raw DTS"),
 800     "audio/x-dca",
 801     "dts",
 802     0,
 803     CODEC_ID_DTS,
 804     CODEC_ID_NONE,
 805     NULL,
 806     raw_write_packet,
 807     .flags= AVFMT_NOTIMESTAMPS,
 808 };
 809 #endif
 810
 811 #if CONFIG_EAC3_DEMUXER
 812 AVInputFormat eac3_demuxer = {
 813     "eac3",
 814     NULL_IF_CONFIG_SMALL("raw E-AC-3"),
 815     0,
 816     eac3_probe,
 817     audio_read_header,
 818     raw_read_partial_packet,
 819     .flags= AVFMT_GENERIC_INDEX,
 820     .extensions = "eac3",
 821     .value = CODEC_ID_EAC3,
 822 };
 823 #endif
 824
 825 #if CONFIG_EAC3_MUXER
 826 AVOutputFormat eac3_muxer = {
 827     "eac3",
 828     NULL_IF_CONFIG_SMALL("raw E-AC-3"),
 829     "audio/x-eac3",
 830     "eac3",
 831     0,
 832     CODEC_ID_EAC3,
 833     CODEC_ID_NONE,
 834     NULL,
 835     raw_write_packet,
 836     .flags= AVFMT_NOTIMESTAMPS,
 837 };
 838 #endif
 839
 840 #if CONFIG_FLAC_DEMUXER
 841 AVInputFormat flac_demuxer = {
 842     "flac",
 843     NULL_IF_CONFIG_SMALL("raw FLAC"),
 844     0,
 845     flac_probe,
 846     audio_read_header,
 847     raw_read_partial_packet,
 848     .flags= AVFMT_GENERIC_INDEX,
 849     .extensions = "flac",
 850     .value = CODEC_ID_FLAC,
 851 };
 852 #endif
 853
 854 #if CONFIG_FLAC_MUXER
 855 AVOutputFormat flac_muxer = {
 856     "flac",
 857     NULL_IF_CONFIG_SMALL("raw FLAC"),
 858     "audio/x-flac",
 859     "flac",
 860     0,
 861     CODEC_ID_FLAC,
 862     CODEC_ID_NONE,
 863     flac_write_header,
 864     raw_write_packet,
 865     flac_write_trailer,
 866     .flags= AVFMT_NOTIMESTAMPS,
 867 };
 868 #endif
 869
 870 #if CONFIG_GSM_DEMUXER
 871 AVInputFormat gsm_demuxer = {
 872     "gsm",
 873     NULL_IF_CONFIG_SMALL("raw GSM"),
 874     0,
 875     NULL,
 876     audio_read_header,
 877     raw_read_partial_packet,
 878     .flags= AVFMT_GENERIC_INDEX,
 879     .extensions = "gsm",
 880     .value = CODEC_ID_GSM,
 881 };
 882 #endif
 883
 884 #if CONFIG_H261_DEMUXER
 885 AVInputFormat h261_demuxer = {
 886     "h261",
 887     NULL_IF_CONFIG_SMALL("raw H.261"),
 888     0,
 889     h261_probe,
 890     video_read_header,
 891     raw_read_partial_packet,
 892     .flags= AVFMT_GENERIC_INDEX,
 893     .extensions = "h261",
 894     .value = CODEC_ID_H261,
 895 };
 896 #endif
 897
 898 #if CONFIG_H261_MUXER
 899 AVOutputFormat h261_muxer = {
 900     "h261",
 901     NULL_IF_CONFIG_SMALL("raw H.261"),
 902     "video/x-h261",
 903     "h261",
 904     0,
 905     CODEC_ID_NONE,
 906     CODEC_ID_H261,
 907     NULL,
 908     raw_write_packet,
 909     .flags= AVFMT_NOTIMESTAMPS,
 910 };
 911 #endif
 912
 913 #if CONFIG_H263_DEMUXER
 914 AVInputFormat h263_demuxer = {
 915     "h263",
 916     NULL_IF_CONFIG_SMALL("raw H.263"),
 917     0,
 918     h263_probe,
 919     video_read_header,
 920     raw_read_partial_packet,
 921     .flags= AVFMT_GENERIC_INDEX,
 922 //    .extensions = "h263", //FIXME remove after writing mpeg4_probe
 923     .value = CODEC_ID_H263,
 924 };
 925 #endif
 926
 927 #if CONFIG_H263_MUXER
 928 AVOutputFormat h263_muxer = {
 929     "h263",
 930     NULL_IF_CONFIG_SMALL("raw H.263"),
 931     "video/x-h263",
 932     "h263",
 933     0,
 934     CODEC_ID_NONE,
 935     CODEC_ID_H263,
 936     NULL,
 937     raw_write_packet,
 938     .flags= AVFMT_NOTIMESTAMPS,
 939 };
 940 #endif
 941
 942 #if CONFIG_H264_DEMUXER
 943 AVInputFormat h264_demuxer = {
 944     "h264",
 945     NULL_IF_CONFIG_SMALL("raw H.264 video format"),
 946     0,
 947     h264_probe,
 948     video_read_header,
 949     raw_read_partial_packet,
 950     .flags= AVFMT_GENERIC_INDEX,
 951     .extensions = "h26l,h264,264", //FIXME remove after writing mpeg4_probe
 952     .value = CODEC_ID_H264,
 953 };
 954 #endif
 955
 956 #if CONFIG_H264_MUXER
 957 AVOutputFormat h264_muxer = {
 958     "h264",
 959     NULL_IF_CONFIG_SMALL("raw H.264 video format"),
 960     NULL,
 961     "h264",
 962     0,
 963     CODEC_ID_NONE,
 964     CODEC_ID_H264,
 965     NULL,
 966     raw_write_packet,
 967     .flags= AVFMT_NOTIMESTAMPS,
 968 };
 969 #endif
 970
 971 #if CONFIG_INGENIENT_DEMUXER
 972 AVInputFormat ingenient_demuxer = {
 973     "ingenient",
 974     NULL_IF_CONFIG_SMALL("raw Ingenient MJPEG"),
 975     0,
 976     NULL,
 977     video_read_header,
 978     ingenient_read_packet,
 979     .flags= AVFMT_GENERIC_INDEX,
 980     .extensions = "cgi", // FIXME
 981     .value = CODEC_ID_MJPEG,
 982 };
 983 #endif
 984
 985 #if CONFIG_M4V_DEMUXER
 986 AVInputFormat m4v_demuxer = {
 987     "m4v",
 988     NULL_IF_CONFIG_SMALL("raw MPEG-4 video format"),
 989     0,
 990     mpeg4video_probe, /** probing for MPEG-4 data */
 991     video_read_header,
 992     raw_read_partial_packet,
 993     .flags= AVFMT_GENERIC_INDEX,
 994     .extensions = "m4v",
 995     .value = CODEC_ID_MPEG4,
 996 };
 997 #endif
 998
 999 #if CONFIG_M4V_MUXER
1000 AVOutputFormat m4v_muxer = {
1001     "m4v",
1002     NULL_IF_CONFIG_SMALL("raw MPEG-4 video format"),
1003     NULL,
1004     "m4v",
1005     0,
1006     CODEC_ID_NONE,
1007     CODEC_ID_MPEG4,
1008     NULL,
1009     raw_write_packet,
1010     .flags= AVFMT_NOTIMESTAMPS,
1011 };
1012 #endif
1013
1014 #if CONFIG_MJPEG_DEMUXER
1015 AVInputFormat mjpeg_demuxer = {
1016     "mjpeg",
1017     NULL_IF_CONFIG_SMALL("raw MJPEG video"),
1018     0,
1019     NULL,
1020     video_read_header,
1021     raw_read_partial_packet,
1022     .flags= AVFMT_GENERIC_INDEX,
1023     .extensions = "mjpg,mjpeg",
1024     .value = CODEC_ID_MJPEG,
1025 };
1026 #endif
1027
1028 #if CONFIG_MJPEG_MUXER
1029 AVOutputFormat mjpeg_muxer = {
1030     "mjpeg",
1031     NULL_IF_CONFIG_SMALL("raw MJPEG video"),
1032     "video/x-mjpeg",
1033     "mjpg,mjpeg",
1034     0,
1035     CODEC_ID_NONE,
1036     CODEC_ID_MJPEG,
1037     NULL,
1038     raw_write_packet,
1039     .flags= AVFMT_NOTIMESTAMPS,
1040 };
1041 #endif
1042
1043 #if CONFIG_MLP_DEMUXER
1044 AVInputFormat mlp_demuxer = {
1045     "mlp",
1046     NULL_IF_CONFIG_SMALL("raw MLP"),
1047     0,
1048     NULL,
1049     audio_read_header,
1050     raw_read_partial_packet,
1051     .flags= AVFMT_GENERIC_INDEX,
1052     .extensions = "mlp",
1053     .value = CODEC_ID_MLP,
1054 };
1055 #endif
1056
1057 #if CONFIG_MPEG1VIDEO_MUXER
1058 AVOutputFormat mpeg1video_muxer = {
1059     "mpeg1video",
1060     NULL_IF_CONFIG_SMALL("raw MPEG-1 video"),
1061     "video/x-mpeg",
1062     "mpg,mpeg,m1v",
1063     0,
1064     CODEC_ID_NONE,
1065     CODEC_ID_MPEG1VIDEO,
1066     NULL,
1067     raw_write_packet,
1068     .flags= AVFMT_NOTIMESTAMPS,
1069 };
1070 #endif
1071
1072 #if CONFIG_MPEG2VIDEO_MUXER
1073 AVOutputFormat mpeg2video_muxer = {
1074     "mpeg2video",
1075     NULL_IF_CONFIG_SMALL("raw MPEG-2 video"),
1076     NULL,
1077     "m2v",
1078     0,
1079     CODEC_ID_NONE,
1080     CODEC_ID_MPEG2VIDEO,
1081     NULL,
1082     raw_write_packet,
1083     .flags= AVFMT_NOTIMESTAMPS,
1084 };
1085 #endif
1086
1087 #if CONFIG_MPEGVIDEO_DEMUXER
1088 AVInputFormat mpegvideo_demuxer = {
1089     "mpegvideo",
1090     NULL_IF_CONFIG_SMALL("raw MPEG video"),
1091     0,
1092     mpegvideo_probe,
1093     video_read_header,
1094     raw_read_partial_packet,
1095     .flags= AVFMT_GENERIC_INDEX,
1096     .value = CODEC_ID_MPEG1VIDEO,
1097 };
1098 #endif
1099
1100 #if CONFIG_CAVSVIDEO_DEMUXER
1101 AVInputFormat cavsvideo_demuxer = {
1102     "cavsvideo",
1103     NULL_IF_CONFIG_SMALL("Chinese AVS video"),
1104     0,
1105     cavsvideo_probe,
1106     video_read_header,
1107     raw_read_partial_packet,
1108     .flags= AVFMT_GENERIC_INDEX,
1109     .value = CODEC_ID_CAVS,
1110 };
1111 #endif
1112
1113 #if CONFIG_NULL_MUXER
1114 AVOutputFormat null_muxer = {
1115     "null",
1116     NULL_IF_CONFIG_SMALL("raw null video format"),
1117     NULL,
1118     NULL,
1119     0,
1120 #ifdef WORDS_BIGENDIAN
1121     CODEC_ID_PCM_S16BE,
1122 #else
1123     CODEC_ID_PCM_S16LE,
1124 #endif
1125     CODEC_ID_RAWVIDEO,
1126     NULL,
1127     null_write_packet,
1128     .flags = AVFMT_NOFILE | AVFMT_RAWPICTURE | AVFMT_NOTIMESTAMPS,
1129 };
1130 #endif
1131
1132 #if CONFIG_RAWVIDEO_DEMUXER
1133 AVInputFormat rawvideo_demuxer = {
1134     "rawvideo",
1135     NULL_IF_CONFIG_SMALL("raw video format"),
1136     0,
1137     NULL,
1138     raw_read_header,
1139     rawvideo_read_packet,
1140     .flags= AVFMT_GENERIC_INDEX,
1141     .extensions = "yuv,cif,qcif,rgb",
1142     .value = CODEC_ID_RAWVIDEO,
1143 };
1144 #endif
1145
1146 #if CONFIG_RAWVIDEO_MUXER
1147 AVOutputFormat rawvideo_muxer = {
1148     "rawvideo",
1149     NULL_IF_CONFIG_SMALL("raw video format"),
1150     NULL,
1151     "yuv,rgb",
1152     0,
1153     CODEC_ID_NONE,
1154     CODEC_ID_RAWVIDEO,
1155     NULL,
1156     raw_write_packet,
1157     .flags= AVFMT_NOTIMESTAMPS,
1158 };
1159 #endif
1160
1161 #if CONFIG_ROQ_MUXER
1162 AVOutputFormat roq_muxer =
1163 {
1164     "RoQ",
1165     NULL_IF_CONFIG_SMALL("raw id RoQ format"),
1166     NULL,
1167     "roq",
1168     0,
1169     CODEC_ID_ROQ_DPCM,
1170     CODEC_ID_ROQ,
1171     roq_write_header,
1172     raw_write_packet,
1173 };
1174 #endif
1175
1176 #if CONFIG_SHORTEN_DEMUXER
1177 AVInputFormat shorten_demuxer = {
1178     "shn",
1179     NULL_IF_CONFIG_SMALL("raw Shorten"),
1180     0,
1181     NULL,
1182     audio_read_header,
1183     raw_read_partial_packet,
1184     .flags= AVFMT_GENERIC_INDEX,
1185     .extensions = "shn",
1186     .value = CODEC_ID_SHORTEN,
1187 };
1188 #endif
1189
1190 #if CONFIG_VC1_DEMUXER
1191 AVInputFormat vc1_demuxer = {
1192     "vc1",
1193     NULL_IF_CONFIG_SMALL("raw VC-1"),
1194     0,
1195     NULL /* vc1_probe */,
1196     video_read_header,
1197     raw_read_partial_packet,
1198     .extensions = "vc1",
1199     .value = CODEC_ID_VC1,
1200 };
1201 #endif
1202
1203 /* PCM formats */
1204
1205 #define PCMINPUTDEF(name, long_name, ext, codec) \
1206 AVInputFormat pcm_ ## name ## _demuxer = {\
1207     #name,\
1208     NULL_IF_CONFIG_SMALL(long_name),\
1209     0,\
1210     NULL,\
1211     raw_read_header,\
1212     raw_read_packet,\
1213     NULL,\
1214     pcm_read_seek,\
1215     .flags= AVFMT_GENERIC_INDEX,\
1216     .extensions = ext,\
1217     .value = codec,\
1218 };
1219
1220 #define PCMOUTPUTDEF(name, long_name, ext, codec) \
1221 AVOutputFormat pcm_ ## name ## _muxer = {\
1222     #name,\
1223     NULL_IF_CONFIG_SMALL(long_name),\
1224     NULL,\
1225     ext,\
1226     0,\
1227     codec,\
1228     CODEC_ID_NONE,\
1229     NULL,\
1230     raw_write_packet,\
1231     .flags= AVFMT_NOTIMESTAMPS,\
1232 };
1233
1234
1235 #if  !CONFIG_MUXERS && CONFIG_DEMUXERS
1236 #define PCMDEF(name, long_name, ext, codec) \
1237         PCMINPUTDEF(name, long_name, ext, codec)
1238 #elif CONFIG_MUXERS && !CONFIG_DEMUXERS
1239 #define PCMDEF(name, long_name, ext, codec) \
1240         PCMOUTPUTDEF(name, long_name, ext, codec)
1241 #elif CONFIG_MUXERS && CONFIG_DEMUXERS
1242 #define PCMDEF(name, long_name, ext, codec) \
1243         PCMINPUTDEF(name, long_name, ext, codec)\
1244         PCMOUTPUTDEF(name, long_name, ext, codec)
1245 #else
1246 #define PCMDEF(name, long_name, ext, codec)
1247 #endif
1248
1249 #ifdef WORDS_BIGENDIAN
1250 #define BE_DEF(s) s
1251 #define LE_DEF(s) NULL
1252 #else
1253 #define BE_DEF(s) NULL
1254 #define LE_DEF(s) s
1255 #endif
1256
1257 PCMDEF(f64be, "PCM 64 bit floating-point big-endian format",
1258        NULL, CODEC_ID_PCM_F64BE)
1259
1260 PCMDEF(f64le, "PCM 64 bit floating-point little-endian format",
1261        NULL, CODEC_ID_PCM_F64LE)
1262
1263 PCMDEF(f32be, "PCM 32 bit floating-point big-endian format",
1264        NULL, CODEC_ID_PCM_F32BE)
1265
1266 PCMDEF(f32le, "PCM 32 bit floating-point little-endian format",
1267        NULL, CODEC_ID_PCM_F32LE)
1268
1269 PCMDEF(s32be, "PCM signed 32 bit big-endian format",
1270        NULL, CODEC_ID_PCM_S32BE)
1271
1272 PCMDEF(s32le, "PCM signed 32 bit little-endian format",
1273        NULL, CODEC_ID_PCM_S32LE)
1274
1275 PCMDEF(s24be, "PCM signed 24 bit big-endian format",
1276        NULL, CODEC_ID_PCM_S24BE)
1277
1278 PCMDEF(s24le, "PCM signed 24 bit little-endian format",
1279        NULL, CODEC_ID_PCM_S24LE)
1280
1281 PCMDEF(s16be, "PCM signed 16 bit big-endian format",
1282        BE_DEF("sw"), CODEC_ID_PCM_S16BE)
1283
1284 PCMDEF(s16le, "PCM signed 16 bit little-endian format",
1285        LE_DEF("sw"), CODEC_ID_PCM_S16LE)
1286
1287 PCMDEF(s8, "PCM signed 8 bit format",
1288        "sb", CODEC_ID_PCM_S8)
1289
1290 PCMDEF(u32be, "PCM unsigned 32 bit big-endian format",
1291        NULL, CODEC_ID_PCM_U32BE)
1292
1293 PCMDEF(u32le, "PCM unsigned 32 bit little-endian format",
1294        NULL, CODEC_ID_PCM_U32LE)
1295
1296 PCMDEF(u24be, "PCM unsigned 24 bit big-endian format",
1297        NULL, CODEC_ID_PCM_U24BE)
1298
1299 PCMDEF(u24le, "PCM unsigned 24 bit little-endian format",
1300        NULL, CODEC_ID_PCM_U24LE)
1301
1302 PCMDEF(u16be, "PCM unsigned 16 bit big-endian format",
1303        BE_DEF("uw"), CODEC_ID_PCM_U16BE)
1304
1305 PCMDEF(u16le, "PCM unsigned 16 bit little-endian format",
1306        LE_DEF("uw"), CODEC_ID_PCM_U16LE)
1307
1308 PCMDEF(u8, "PCM unsigned 8 bit format",
1309        "ub", CODEC_ID_PCM_U8)
1310
1311 PCMDEF(alaw, "PCM A-law format",
1312        "al", CODEC_ID_PCM_ALAW)
1313
1314 PCMDEF(mulaw, "PCM mu-law format",
1315        "ul", CODEC_ID_PCM_MULAW)