git.sesse.net Git - ffmpeg/blob - 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/get_bits.h"
  26 #include "libavcodec/bytestream.h"
  27 #include "avformat.h"
  28 #include "raw.h"
  29 #include "id3v2.h"
  30 #include "id3v1.h"
  31
  32 /* simple formats */
  33
  34 #if CONFIG_ROQ_MUXER
  35 static int roq_write_header(struct AVFormatContext *s)
  36 {
  37     static const uint8_t header[] = {
  38         0x84, 0x10, 0xFF, 0xFF, 0xFF, 0xFF, 0x1E, 0x00
  39     };
  40
  41     put_buffer(s->pb, header, 8);
  42     put_flush_packet(s->pb);
  43
  44     return 0;
  45 }
  46 #endif
  47
  48 #if CONFIG_NULL_MUXER
  49 static int null_write_packet(struct AVFormatContext *s, AVPacket *pkt)
  50 {
  51     return 0;
  52 }
  53 #endif
  54
  55 #if CONFIG_MUXERS
  56 static int raw_write_packet(struct AVFormatContext *s, AVPacket *pkt)
  57 {
  58     put_buffer(s->pb, pkt->data, pkt->size);
  59     put_flush_packet(s->pb);
  60     return 0;
  61 }
  62 #endif
  63
  64 #if CONFIG_DEMUXERS
  65 /* raw input */
  66 static int raw_read_header(AVFormatContext *s, AVFormatParameters *ap)
  67 {
  68     AVStream *st;
  69     int id;
  70
  71     st = av_new_stream(s, 0);
  72     if (!st)
  73         return AVERROR(ENOMEM);
  74
  75         id = s->iformat->value;
  76         if (id == CODEC_ID_RAWVIDEO) {
  77             st->codec->codec_type = CODEC_TYPE_VIDEO;
  78         } else {
  79             st->codec->codec_type = CODEC_TYPE_AUDIO;
  80         }
  81         st->codec->codec_id = id;
  82
  83         switch(st->codec->codec_type) {
  84         case CODEC_TYPE_AUDIO:
  85             st->codec->sample_rate = ap->sample_rate;
  86             if(ap->channels) st->codec->channels = ap->channels;
  87             else             st->codec->channels = 1;
  88             st->codec->bits_per_coded_sample = av_get_bits_per_sample(st->codec->codec_id);
  89             assert(st->codec->bits_per_coded_sample > 0);
  90             st->codec->block_align = st->codec->bits_per_coded_sample*st->codec->channels/8;
  91             av_set_pts_info(st, 64, 1, st->codec->sample_rate);
  92             break;
  93         case CODEC_TYPE_VIDEO:
  94             if(ap->time_base.num)
  95                 av_set_pts_info(st, 64, ap->time_base.num, ap->time_base.den);
  96             else
  97                 av_set_pts_info(st, 64, 1, 25);
  98             st->codec->width = ap->width;
  99             st->codec->height = ap->height;
 100             st->codec->pix_fmt = ap->pix_fmt;
 101             if(st->codec->pix_fmt == PIX_FMT_NONE)
 102                 st->codec->pix_fmt= PIX_FMT_YUV420P;
 103             break;
 104         default:
 105             return -1;
 106         }
 107     return 0;
 108 }
 109
 110 #define RAW_PACKET_SIZE 1024
 111 #define RAW_SAMPLES     1024
 112
 113 static int raw_read_packet(AVFormatContext *s, AVPacket *pkt)
 114 {
 115     int ret, size, bps;
 116     //    AVStream *st = s->streams[0];
 117
 118     size= RAW_SAMPLES*s->streams[0]->codec->block_align;
 119
 120     ret= av_get_packet(s->pb, pkt, size);
 121
 122     pkt->stream_index = 0;
 123     if (ret <= 0) {
 124         return AVERROR(EIO);
 125     }
 126     /* note: we need to modify the packet size here to handle the last
 127        packet */
 128     pkt->size = ret;
 129
 130     bps= av_get_bits_per_sample(s->streams[0]->codec->codec_id);
 131     assert(bps); // if false there IS a bug elsewhere (NOT in this function)
 132     pkt->dts=
 133     pkt->pts= pkt->pos*8 / (bps * s->streams[0]->codec->channels);
 134
 135     return ret;
 136 }
 137
 138 int ff_raw_read_partial_packet(AVFormatContext *s, AVPacket *pkt)
 139 {
 140     int ret, size;
 141
 142     size = RAW_PACKET_SIZE;
 143
 144     if (av_new_packet(pkt, size) < 0)
 145         return AVERROR(EIO);
 146
 147     pkt->pos= url_ftell(s->pb);
 148     pkt->stream_index = 0;
 149     ret = get_partial_buffer(s->pb, pkt->data, size);
 150     if (ret <= 0) {
 151         av_free_packet(pkt);
 152         return AVERROR(EIO);
 153     }
 154     pkt->size = ret;
 155     return ret;
 156 }
 157 #endif
 158
 159 #if CONFIG_RAWVIDEO_DEMUXER
 160 static int rawvideo_read_packet(AVFormatContext *s, AVPacket *pkt)
 161 {
 162     int packet_size, ret, width, height;
 163     AVStream *st = s->streams[0];
 164
 165     width = st->codec->width;
 166     height = st->codec->height;
 167
 168     packet_size = avpicture_get_size(st->codec->pix_fmt, width, height);
 169     if (packet_size < 0)
 170         return -1;
 171
 172     ret= av_get_packet(s->pb, pkt, packet_size);
 173     pkt->pts=
 174     pkt->dts= pkt->pos / packet_size;
 175
 176     pkt->stream_index = 0;
 177     if (ret != packet_size) {
 178         return AVERROR(EIO);
 179     } else {
 180         return 0;
 181     }
 182 }
 183 #endif
 184
 185 #if CONFIG_INGENIENT_DEMUXER
 186 // http://www.artificis.hu/files/texts/ingenient.txt
 187 static int ingenient_read_packet(AVFormatContext *s, AVPacket *pkt)
 188 {
 189     int ret, size, w, h, unk1, unk2;
 190
 191     if (get_le32(s->pb) != MKTAG('M', 'J', 'P', 'G'))
 192         return AVERROR(EIO); // FIXME
 193
 194     size = get_le32(s->pb);
 195
 196     w = get_le16(s->pb);
 197     h = get_le16(s->pb);
 198
 199     url_fskip(s->pb, 8); // zero + size (padded?)
 200     url_fskip(s->pb, 2);
 201     unk1 = get_le16(s->pb);
 202     unk2 = get_le16(s->pb);
 203     url_fskip(s->pb, 22); // ASCII timestamp
 204
 205     av_log(s, AV_LOG_DEBUG, "Ingenient packet: size=%d, width=%d, height=%d, unk1=%d unk2=%d\n",
 206         size, w, h, unk1, unk2);
 207
 208     if (av_new_packet(pkt, size) < 0)
 209         return AVERROR(EIO);
 210
 211     pkt->pos = url_ftell(s->pb);
 212     pkt->stream_index = 0;
 213     ret = get_buffer(s->pb, pkt->data, size);
 214     if (ret <= 0) {
 215         av_free_packet(pkt);
 216         return AVERROR(EIO);
 217     }
 218     pkt->size = ret;
 219     return ret;
 220 }
 221 #endif
 222
 223 #if CONFIG_DEMUXERS
 224 int pcm_read_seek(AVFormatContext *s,
 225                   int stream_index, int64_t timestamp, int flags)
 226 {
 227     AVStream *st;
 228     int block_align, byte_rate, ret;
 229     int64_t pos;
 230
 231     st = s->streams[0];
 232
 233     block_align = st->codec->block_align ? st->codec->block_align :
 234         (av_get_bits_per_sample(st->codec->codec_id) * st->codec->channels) >> 3;
 235     byte_rate = st->codec->bit_rate ? st->codec->bit_rate >> 3 :
 236         block_align * st->codec->sample_rate;
 237
 238     if (block_align <= 0 || byte_rate <= 0)
 239         return -1;
 240     if (timestamp < 0) timestamp = 0;
 241
 242     /* compute the position by aligning it to block_align */
 243     pos = av_rescale_rnd(timestamp * byte_rate,
 244                          st->time_base.num,
 245                          st->time_base.den * (int64_t)block_align,
 246                          (flags & AVSEEK_FLAG_BACKWARD) ? AV_ROUND_DOWN : AV_ROUND_UP);
 247     pos *= block_align;
 248
 249     /* recompute exact position */
 250     st->cur_dts = av_rescale(pos, st->time_base.den, byte_rate * (int64_t)st->time_base.num);
 251     if ((ret = url_fseek(s->pb, pos + s->data_offset, SEEK_SET)) < 0)
 252         return ret;
 253     return 0;
 254 }
 255
 256 static int audio_read_header(AVFormatContext *s,
 257                              AVFormatParameters *ap)
 258 {
 259     AVStream *st = av_new_stream(s, 0);
 260     if (!st)
 261         return AVERROR(ENOMEM);
 262     st->codec->codec_type = CODEC_TYPE_AUDIO;
 263     st->codec->codec_id = s->iformat->value;
 264     st->need_parsing = AVSTREAM_PARSE_FULL;
 265     /* the parameters will be extracted from the compressed bitstream */
 266
 267     return 0;
 268 }
 269
 270 /* MPEG-1/H.263 input */
 271 static int video_read_header(AVFormatContext *s,
 272                              AVFormatParameters *ap)
 273 {
 274     AVStream *st;
 275
 276     st = av_new_stream(s, 0);
 277     if (!st)
 278         return AVERROR(ENOMEM);
 279
 280     st->codec->codec_type = CODEC_TYPE_VIDEO;
 281     st->codec->codec_id = s->iformat->value;
 282     st->need_parsing = AVSTREAM_PARSE_FULL;
 283
 284     /* for MJPEG, specify frame rate */
 285     /* for MPEG-4 specify it, too (most MPEG-4 streams do not have the fixed_vop_rate set ...)*/
 286     if (ap->time_base.num) {
 287         st->codec->time_base= ap->time_base;
 288     } else if ( st->codec->codec_id == CODEC_ID_MJPEG ||
 289                 st->codec->codec_id == CODEC_ID_MPEG4 ||
 290                 st->codec->codec_id == CODEC_ID_DIRAC ||
 291                 st->codec->codec_id == CODEC_ID_H264) {
 292         st->codec->time_base= (AVRational){1,25};
 293     }
 294     av_set_pts_info(st, 64, 1, 1200000);
 295
 296     return 0;
 297 }
 298 #endif
 299
 300 #if CONFIG_MPEGVIDEO_DEMUXER
 301 #define SEQ_START_CODE          0x000001b3
 302 #define GOP_START_CODE          0x000001b8
 303 #define PICTURE_START_CODE      0x00000100
 304 #define SLICE_START_CODE        0x00000101
 305 #define PACK_START_CODE         0x000001ba
 306 #define VIDEO_ID                0x000001e0
 307 #define AUDIO_ID                0x000001c0
 308
 309 static int mpegvideo_probe(AVProbeData *p)
 310 {
 311     uint32_t code= -1;
 312     int pic=0, seq=0, slice=0, pspack=0, pes=0;
 313     int i;
 314
 315     for(i=0; i<p->buf_size; i++){
 316         code = (code<<8) + p->buf[i];
 317         if ((code & 0xffffff00) == 0x100) {
 318             switch(code){
 319             case     SEQ_START_CODE:   seq++; break;
 320             case PICTURE_START_CODE:   pic++; break;
 321             case   SLICE_START_CODE: slice++; break;
 322             case    PACK_START_CODE: pspack++; break;
 323             }
 324             if     ((code & 0x1f0) == VIDEO_ID)   pes++;
 325             else if((code & 0x1e0) == AUDIO_ID)   pes++;
 326         }
 327     }
 328     if(seq && seq*9<=pic*10 && pic*9<=slice*10 && !pspack && !pes)
 329         return AVPROBE_SCORE_MAX/2+1; // +1 for .mpg
 330     return 0;
 331 }
 332 #endif
 333
 334 #if CONFIG_CAVSVIDEO_DEMUXER
 335 #define CAVS_SEQ_START_CODE       0x000001b0
 336 #define CAVS_PIC_I_START_CODE     0x000001b3
 337 #define CAVS_UNDEF_START_CODE     0x000001b4
 338 #define CAVS_PIC_PB_START_CODE    0x000001b6
 339 #define CAVS_VIDEO_EDIT_CODE      0x000001b7
 340 #define CAVS_PROFILE_JIZHUN       0x20
 341
 342 static int cavsvideo_probe(AVProbeData *p)
 343 {
 344     uint32_t code= -1;
 345     int pic=0, seq=0, slice_pos = 0;
 346     int i;
 347
 348     for(i=0; i<p->buf_size; i++){
 349         code = (code<<8) + p->buf[i];
 350         if ((code & 0xffffff00) == 0x100) {
 351             if(code < CAVS_SEQ_START_CODE) {
 352                 /* slices have to be consecutive */
 353                 if(code < slice_pos)
 354                     return 0;
 355                 slice_pos = code;
 356             } else {
 357                 slice_pos = 0;
 358             }
 359             if (code == CAVS_SEQ_START_CODE) {
 360                 seq++;
 361                 /* check for the only currently supported profile */
 362                 if(p->buf[i+1] != CAVS_PROFILE_JIZHUN)
 363                     return 0;
 364             } else if ((code == CAVS_PIC_I_START_CODE) ||
 365                        (code == CAVS_PIC_PB_START_CODE)) {
 366                 pic++;
 367             } else if ((code == CAVS_UNDEF_START_CODE) ||
 368                        (code >  CAVS_VIDEO_EDIT_CODE)) {
 369                 return 0;
 370             }
 371         }
 372     }
 373     if(seq && seq*9<=pic*10)
 374         return AVPROBE_SCORE_MAX/2;
 375     return 0;
 376 }
 377 #endif
 378
 379 #if CONFIG_M4V_DEMUXER
 380 #define VISUAL_OBJECT_START_CODE       0x000001b5
 381 #define VOP_START_CODE                 0x000001b6
 382
 383 static int mpeg4video_probe(AVProbeData *probe_packet)
 384 {
 385     uint32_t temp_buffer= -1;
 386     int VO=0, VOL=0, VOP = 0, VISO = 0, res=0;
 387     int i;
 388
 389     for(i=0; i<probe_packet->buf_size; i++){
 390         temp_buffer = (temp_buffer<<8) + probe_packet->buf[i];
 391         if ((temp_buffer & 0xffffff00) != 0x100)
 392             continue;
 393
 394         if (temp_buffer == VOP_START_CODE)                         VOP++;
 395         else if (temp_buffer == VISUAL_OBJECT_START_CODE)          VISO++;
 396         else if (temp_buffer < 0x120)                              VO++;
 397         else if (temp_buffer < 0x130)                              VOL++;
 398         else if (   !(0x1AF < temp_buffer && temp_buffer < 0x1B7)
 399                  && !(0x1B9 < temp_buffer && temp_buffer < 0x1C4)) res++;
 400     }
 401
 402     if ( VOP >= VISO && VOP >= VOL && VO >= VOL && VOL > 0 && res==0)
 403         return AVPROBE_SCORE_MAX/2;
 404     return 0;
 405 }
 406 #endif
 407
 408 #if CONFIG_H264_DEMUXER
 409 static int h264_probe(AVProbeData *p)
 410 {
 411     uint32_t code= -1;
 412     int sps=0, pps=0, idr=0, res=0, sli=0;
 413     int i;
 414
 415     for(i=0; i<p->buf_size; i++){
 416         code = (code<<8) + p->buf[i];
 417         if ((code & 0xffffff00) == 0x100) {
 418             int ref_idc= (code>>5)&3;
 419             int type   = code & 0x1F;
 420             static const int8_t ref_zero[32]={
 421                 2, 0, 0, 0, 0,-1, 1,-1,
 422                -1, 1, 1, 1, 1,-1, 2, 2,
 423                 2, 2, 2, 0, 2, 2, 2, 2,
 424                 2, 2, 2, 2, 2, 2, 2, 2
 425             };
 426
 427             if(code & 0x80) //forbidden bit
 428                 return 0;
 429
 430             if(ref_zero[type] == 1 && ref_idc)
 431                 return 0;
 432             if(ref_zero[type] ==-1 && !ref_idc)
 433                 return 0;
 434             if(ref_zero[type] == 2)
 435                 res++;
 436
 437             switch(type){
 438             case     1:   sli++; break;
 439             case     5:   idr++; break;
 440             case     7:
 441                 if(p->buf[i+2]&0x0F)
 442                     return 0;
 443                 sps++;
 444                 break;
 445             case     8:   pps++; break;
 446             }
 447         }
 448     }
 449     if(sps && pps && (idr||sli>3) && res<(sps+pps+idr))
 450         return AVPROBE_SCORE_MAX/2+1; // +1 for .mpg
 451     return 0;
 452 }
 453 #endif
 454
 455 #if CONFIG_H263_DEMUXER
 456 static int h263_probe(AVProbeData *p)
 457 {
 458     uint64_t code= -1;
 459     int i;
 460     int valid_psc=0;
 461     int invalid_psc=0;
 462     int res_change=0;
 463     int src_fmt, last_src_fmt=-1;
 464
 465     for(i=0; i<p->buf_size; i++){
 466         code = (code<<8) + p->buf[i];
 467         if ((code & 0xfffffc0000) == 0x800000) {
 468             src_fmt= (code>>2)&3;
 469             if(   src_fmt != last_src_fmt
 470                && last_src_fmt>0 && last_src_fmt<6
 471                && src_fmt<6)
 472                 res_change++;
 473
 474             if((code&0x300)==0x200 && src_fmt){
 475                 valid_psc++;
 476             }else
 477                 invalid_psc++;
 478             last_src_fmt= src_fmt;
 479         }
 480     }
 481     if(valid_psc > 2*invalid_psc + 2*res_change + 2){
 482         return 50;
 483     }else if(valid_psc > 2*invalid_psc)
 484         return 25;
 485     return 0;
 486 }
 487 #endif
 488
 489 #if CONFIG_H261_DEMUXER
 490 static int h261_probe(AVProbeData *p)
 491 {
 492     int code;
 493     const uint8_t *d;
 494
 495     d = p->buf;
 496     code = (d[0] << 12) | (d[1] << 4) | (d[2] >> 4);
 497     if (code == 0x10) {
 498         return 50;
 499     }
 500     return 0;
 501 }
 502 #endif
 503
 504 #if CONFIG_DTS_DEMUXER
 505 #define DCA_MARKER_14B_BE 0x1FFFE800
 506 #define DCA_MARKER_14B_LE 0xFF1F00E8
 507 #define DCA_MARKER_RAW_BE 0x7FFE8001
 508 #define DCA_MARKER_RAW_LE 0xFE7F0180
 509 static int dts_probe(AVProbeData *p)
 510 {
 511     const uint8_t *buf, *bufp;
 512     uint32_t state = -1;
 513
 514     buf = p->buf;
 515
 516     for(; buf < (p->buf+p->buf_size)-2; buf+=2) {
 517         bufp = buf;
 518         state = (state << 16) | bytestream_get_be16(&bufp);
 519
 520         /* regular bitstream */
 521         if (state == DCA_MARKER_RAW_BE || state == DCA_MARKER_RAW_LE)
 522             return AVPROBE_SCORE_MAX/2+1;
 523
 524         /* 14 bits big-endian bitstream */
 525         if (state == DCA_MARKER_14B_BE)
 526             if ((bytestream_get_be16(&bufp) & 0xFFF0) == 0x07F0)
 527                 return AVPROBE_SCORE_MAX/2+1;
 528
 529         /* 14 bits little-endian bitstream */
 530         if (state == DCA_MARKER_14B_LE)
 531             if ((bytestream_get_be16(&bufp) & 0xF0FF) == 0xF007)
 532                 return AVPROBE_SCORE_MAX/2+1;
 533     }
 534
 535     return 0;
 536 }
 537 #endif
 538
 539 #if CONFIG_DIRAC_DEMUXER
 540 static int dirac_probe(AVProbeData *p)
 541 {
 542     if (AV_RL32(p->buf) == MKTAG('B', 'B', 'C', 'D'))
 543         return AVPROBE_SCORE_MAX;
 544     else
 545         return 0;
 546 }
 547 #endif
 548
 549 #if CONFIG_DNXHD_DEMUXER
 550 static int dnxhd_probe(AVProbeData *p)
 551 {
 552     static const uint8_t header[] = {0x00,0x00,0x02,0x80,0x01};
 553     if (!memcmp(p->buf, header, 5))
 554         return AVPROBE_SCORE_MAX;
 555     else
 556         return 0;
 557 }
 558 #endif
 559
 560 #if CONFIG_AC3_DEMUXER || CONFIG_EAC3_DEMUXER
 561 static int ac3_eac3_probe(AVProbeData *p, enum CodecID expected_codec_id)
 562 {
 563     int max_frames, first_frames = 0, frames;
 564     uint8_t *buf, *buf2, *end;
 565     AC3HeaderInfo hdr;
 566     GetBitContext gbc;
 567     enum CodecID codec_id = CODEC_ID_AC3;
 568
 569     max_frames = 0;
 570     buf = p->buf;
 571     end = buf + p->buf_size;
 572
 573     for(; buf < end; buf++) {
 574         buf2 = buf;
 575
 576         for(frames = 0; buf2 < end; frames++) {
 577             init_get_bits(&gbc, buf2, 54);
 578             if(ff_ac3_parse_header(&gbc, &hdr) < 0)
 579                 break;
 580             if(buf2 + hdr.frame_size > end ||
 581                av_crc(av_crc_get_table(AV_CRC_16_ANSI), 0, buf2 + 2, hdr.frame_size - 2))
 582                 break;
 583             if (hdr.bitstream_id > 10)
 584                 codec_id = CODEC_ID_EAC3;
 585             buf2 += hdr.frame_size;
 586         }
 587         max_frames = FFMAX(max_frames, frames);
 588         if(buf == p->buf)
 589             first_frames = frames;
 590     }
 591     if(codec_id != expected_codec_id) return 0;
 592     if   (first_frames>=3) return AVPROBE_SCORE_MAX * 3 / 4;
 593     else if(max_frames>=3) return AVPROBE_SCORE_MAX / 2;
 594     else if(max_frames>=1) return 1;
 595     else                   return 0;
 596 }
 597 #endif
 598
 599 #if CONFIG_AC3_DEMUXER
 600 static int ac3_probe(AVProbeData *p)
 601 {
 602     return ac3_eac3_probe(p, CODEC_ID_AC3);
 603 }
 604 #endif
 605
 606 #if CONFIG_EAC3_DEMUXER
 607 static int eac3_probe(AVProbeData *p)
 608 {
 609     return ac3_eac3_probe(p, CODEC_ID_EAC3);
 610 }
 611 #endif
 612
 613 #if CONFIG_AAC_DEMUXER
 614 static int adts_aac_probe(AVProbeData *p)
 615 {
 616     int max_frames = 0, first_frames = 0;
 617     int fsize, frames;
 618     uint8_t *buf0 = p->buf;
 619     uint8_t *buf2;
 620     uint8_t *buf;
 621     uint8_t *end = buf0 + p->buf_size - 7;
 622
 623     if (ff_id3v2_match(buf0)) {
 624         buf0 += ff_id3v2_tag_len(buf0);
 625     }
 626     buf = buf0;
 627
 628     for(; buf < end; buf= buf2+1) {
 629         buf2 = buf;
 630
 631         for(frames = 0; buf2 < end; frames++) {
 632             uint32_t header = AV_RB16(buf2);
 633             if((header&0xFFF6) != 0xFFF0)
 634                 break;
 635             fsize = (AV_RB32(buf2+3)>>13) & 0x8FFF;
 636             if(fsize < 7)
 637                 break;
 638             buf2 += fsize;
 639         }
 640         max_frames = FFMAX(max_frames, frames);
 641         if(buf == buf0)
 642             first_frames= frames;
 643     }
 644     if   (first_frames>=3) return AVPROBE_SCORE_MAX/2+1;
 645     else if(max_frames>500)return AVPROBE_SCORE_MAX/2;
 646     else if(max_frames>=3) return AVPROBE_SCORE_MAX/4;
 647     else if(max_frames>=1) return 1;
 648     else                   return 0;
 649 }
 650
 651 static int adts_aac_read_header(AVFormatContext *s,
 652                                 AVFormatParameters *ap)
 653 {
 654     AVStream *st;
 655
 656     st = av_new_stream(s, 0);
 657     if (!st)
 658         return AVERROR(ENOMEM);
 659
 660     st->codec->codec_type = CODEC_TYPE_AUDIO;
 661     st->codec->codec_id = s->iformat->value;
 662     st->need_parsing = AVSTREAM_PARSE_FULL;
 663
 664     ff_id3v1_read(s);
 665     ff_id3v2_read(s);
 666
 667     return 0;
 668 }
 669
 670 #endif
 671
 672 /* Note: Do not forget to add new entries to the Makefile as well. */
 673
 674 #if CONFIG_AAC_DEMUXER
 675 AVInputFormat aac_demuxer = {
 676     "aac",
 677     NULL_IF_CONFIG_SMALL("raw ADTS AAC"),
 678     0,
 679     adts_aac_probe,
 680     adts_aac_read_header,
 681     ff_raw_read_partial_packet,
 682     .flags= AVFMT_GENERIC_INDEX,
 683     .extensions = "aac",
 684     .value = CODEC_ID_AAC,
 685 };
 686 #endif
 687
 688 #if CONFIG_AC3_DEMUXER
 689 AVInputFormat ac3_demuxer = {
 690     "ac3",
 691     NULL_IF_CONFIG_SMALL("raw AC-3"),
 692     0,
 693     ac3_probe,
 694     audio_read_header,
 695     ff_raw_read_partial_packet,
 696     .flags= AVFMT_GENERIC_INDEX,
 697     .extensions = "ac3",
 698     .value = CODEC_ID_AC3,
 699 };
 700 #endif
 701
 702 #if CONFIG_AC3_MUXER
 703 AVOutputFormat ac3_muxer = {
 704     "ac3",
 705     NULL_IF_CONFIG_SMALL("raw AC-3"),
 706     "audio/x-ac3",
 707     "ac3",
 708     0,
 709     CODEC_ID_AC3,
 710     CODEC_ID_NONE,
 711     NULL,
 712     raw_write_packet,
 713     .flags= AVFMT_NOTIMESTAMPS,
 714 };
 715 #endif
 716
 717 #if CONFIG_DIRAC_DEMUXER
 718 AVInputFormat dirac_demuxer = {
 719     "dirac",
 720     NULL_IF_CONFIG_SMALL("raw Dirac"),
 721     0,
 722     dirac_probe,
 723     video_read_header,
 724     ff_raw_read_partial_packet,
 725     .flags= AVFMT_GENERIC_INDEX,
 726     .value = CODEC_ID_DIRAC,
 727 };
 728 #endif
 729
 730 #if CONFIG_DIRAC_MUXER
 731 AVOutputFormat dirac_muxer = {
 732     "dirac",
 733     NULL_IF_CONFIG_SMALL("raw Dirac"),
 734     NULL,
 735     "drc",
 736     0,
 737     CODEC_ID_NONE,
 738     CODEC_ID_DIRAC,
 739     NULL,
 740     raw_write_packet,
 741     .flags= AVFMT_NOTIMESTAMPS,
 742 };
 743 #endif
 744
 745 #if CONFIG_DNXHD_DEMUXER
 746 AVInputFormat dnxhd_demuxer = {
 747     "dnxhd",
 748     NULL_IF_CONFIG_SMALL("raw DNxHD (SMPTE VC-3)"),
 749     0,
 750     dnxhd_probe,
 751     video_read_header,
 752     ff_raw_read_partial_packet,
 753     .flags= AVFMT_GENERIC_INDEX,
 754     .value = CODEC_ID_DNXHD,
 755 };
 756 #endif
 757
 758 #if CONFIG_DNXHD_MUXER
 759 AVOutputFormat dnxhd_muxer = {
 760     "dnxhd",
 761     NULL_IF_CONFIG_SMALL("raw DNxHD (SMPTE VC-3)"),
 762     NULL,
 763     "dnxhd",
 764     0,
 765     CODEC_ID_NONE,
 766     CODEC_ID_DNXHD,
 767     NULL,
 768     raw_write_packet,
 769     .flags= AVFMT_NOTIMESTAMPS,
 770 };
 771 #endif
 772
 773 #if CONFIG_DTS_DEMUXER
 774 AVInputFormat dts_demuxer = {
 775     "dts",
 776     NULL_IF_CONFIG_SMALL("raw DTS"),
 777     0,
 778     dts_probe,
 779     audio_read_header,
 780     ff_raw_read_partial_packet,
 781     .flags= AVFMT_GENERIC_INDEX,
 782     .extensions = "dts",
 783     .value = CODEC_ID_DTS,
 784 };
 785 #endif
 786
 787 #if CONFIG_DTS_MUXER
 788 AVOutputFormat dts_muxer = {
 789     "dts",
 790     NULL_IF_CONFIG_SMALL("raw DTS"),
 791     "audio/x-dca",
 792     "dts",
 793     0,
 794     CODEC_ID_DTS,
 795     CODEC_ID_NONE,
 796     NULL,
 797     raw_write_packet,
 798     .flags= AVFMT_NOTIMESTAMPS,
 799 };
 800 #endif
 801
 802 #if CONFIG_EAC3_DEMUXER
 803 AVInputFormat eac3_demuxer = {
 804     "eac3",
 805     NULL_IF_CONFIG_SMALL("raw E-AC-3"),
 806     0,
 807     eac3_probe,
 808     audio_read_header,
 809     ff_raw_read_partial_packet,
 810     .flags= AVFMT_GENERIC_INDEX,
 811     .extensions = "eac3",
 812     .value = CODEC_ID_EAC3,
 813 };
 814 #endif
 815
 816 #if CONFIG_EAC3_MUXER
 817 AVOutputFormat eac3_muxer = {
 818     "eac3",
 819     NULL_IF_CONFIG_SMALL("raw E-AC-3"),
 820     "audio/x-eac3",
 821     "eac3",
 822     0,
 823     CODEC_ID_EAC3,
 824     CODEC_ID_NONE,
 825     NULL,
 826     raw_write_packet,
 827     .flags= AVFMT_NOTIMESTAMPS,
 828 };
 829 #endif
 830
 831 #if CONFIG_GSM_DEMUXER
 832 AVInputFormat gsm_demuxer = {
 833     "gsm",
 834     NULL_IF_CONFIG_SMALL("raw GSM"),
 835     0,
 836     NULL,
 837     audio_read_header,
 838     ff_raw_read_partial_packet,
 839     .flags= AVFMT_GENERIC_INDEX,
 840     .extensions = "gsm",
 841     .value = CODEC_ID_GSM,
 842 };
 843 #endif
 844
 845 #if CONFIG_H261_DEMUXER
 846 AVInputFormat h261_demuxer = {
 847     "h261",
 848     NULL_IF_CONFIG_SMALL("raw H.261"),
 849     0,
 850     h261_probe,
 851     video_read_header,
 852     ff_raw_read_partial_packet,
 853     .flags= AVFMT_GENERIC_INDEX,
 854     .extensions = "h261",
 855     .value = CODEC_ID_H261,
 856 };
 857 #endif
 858
 859 #if CONFIG_H261_MUXER
 860 AVOutputFormat h261_muxer = {
 861     "h261",
 862     NULL_IF_CONFIG_SMALL("raw H.261"),
 863     "video/x-h261",
 864     "h261",
 865     0,
 866     CODEC_ID_NONE,
 867     CODEC_ID_H261,
 868     NULL,
 869     raw_write_packet,
 870     .flags= AVFMT_NOTIMESTAMPS,
 871 };
 872 #endif
 873
 874 #if CONFIG_H263_DEMUXER
 875 AVInputFormat h263_demuxer = {
 876     "h263",
 877     NULL_IF_CONFIG_SMALL("raw H.263"),
 878     0,
 879     h263_probe,
 880     video_read_header,
 881     ff_raw_read_partial_packet,
 882     .flags= AVFMT_GENERIC_INDEX,
 883 //    .extensions = "h263", //FIXME remove after writing mpeg4_probe
 884     .value = CODEC_ID_H263,
 885 };
 886 #endif
 887
 888 #if CONFIG_H263_MUXER
 889 AVOutputFormat h263_muxer = {
 890     "h263",
 891     NULL_IF_CONFIG_SMALL("raw H.263"),
 892     "video/x-h263",
 893     "h263",
 894     0,
 895     CODEC_ID_NONE,
 896     CODEC_ID_H263,
 897     NULL,
 898     raw_write_packet,
 899     .flags= AVFMT_NOTIMESTAMPS,
 900 };
 901 #endif
 902
 903 #if CONFIG_H264_DEMUXER
 904 AVInputFormat h264_demuxer = {
 905     "h264",
 906     NULL_IF_CONFIG_SMALL("raw H.264 video format"),
 907     0,
 908     h264_probe,
 909     video_read_header,
 910     ff_raw_read_partial_packet,
 911     .flags= AVFMT_GENERIC_INDEX,
 912     .extensions = "h26l,h264,264", //FIXME remove after writing mpeg4_probe
 913     .value = CODEC_ID_H264,
 914 };
 915 #endif
 916
 917 #if CONFIG_H264_MUXER
 918 AVOutputFormat h264_muxer = {
 919     "h264",
 920     NULL_IF_CONFIG_SMALL("raw H.264 video format"),
 921     NULL,
 922     "h264",
 923     0,
 924     CODEC_ID_NONE,
 925     CODEC_ID_H264,
 926     NULL,
 927     raw_write_packet,
 928     .flags= AVFMT_NOTIMESTAMPS,
 929 };
 930 #endif
 931
 932 #if CONFIG_INGENIENT_DEMUXER
 933 AVInputFormat ingenient_demuxer = {
 934     "ingenient",
 935     NULL_IF_CONFIG_SMALL("raw Ingenient MJPEG"),
 936     0,
 937     NULL,
 938     video_read_header,
 939     ingenient_read_packet,
 940     .flags= AVFMT_GENERIC_INDEX,
 941     .extensions = "cgi", // FIXME
 942     .value = CODEC_ID_MJPEG,
 943 };
 944 #endif
 945
 946 #if CONFIG_M4V_DEMUXER
 947 AVInputFormat m4v_demuxer = {
 948     "m4v",
 949     NULL_IF_CONFIG_SMALL("raw MPEG-4 video format"),
 950     0,
 951     mpeg4video_probe, /** probing for MPEG-4 data */
 952     video_read_header,
 953     ff_raw_read_partial_packet,
 954     .flags= AVFMT_GENERIC_INDEX,
 955     .extensions = "m4v",
 956     .value = CODEC_ID_MPEG4,
 957 };
 958 #endif
 959
 960 #if CONFIG_M4V_MUXER
 961 AVOutputFormat m4v_muxer = {
 962     "m4v",
 963     NULL_IF_CONFIG_SMALL("raw MPEG-4 video format"),
 964     NULL,
 965     "m4v",
 966     0,
 967     CODEC_ID_NONE,
 968     CODEC_ID_MPEG4,
 969     NULL,
 970     raw_write_packet,
 971     .flags= AVFMT_NOTIMESTAMPS,
 972 };
 973 #endif
 974
 975 #if CONFIG_MJPEG_DEMUXER
 976 AVInputFormat mjpeg_demuxer = {
 977     "mjpeg",
 978     NULL_IF_CONFIG_SMALL("raw MJPEG video"),
 979     0,
 980     NULL,
 981     video_read_header,
 982     ff_raw_read_partial_packet,
 983     .flags= AVFMT_GENERIC_INDEX,
 984     .extensions = "mjpg,mjpeg",
 985     .value = CODEC_ID_MJPEG,
 986 };
 987 #endif
 988
 989 #if CONFIG_MJPEG_MUXER
 990 AVOutputFormat mjpeg_muxer = {
 991     "mjpeg",
 992     NULL_IF_CONFIG_SMALL("raw MJPEG video"),
 993     "video/x-mjpeg",
 994     "mjpg,mjpeg",
 995     0,
 996     CODEC_ID_NONE,
 997     CODEC_ID_MJPEG,
 998     NULL,
 999     raw_write_packet,
1000     .flags= AVFMT_NOTIMESTAMPS,
1001 };
1002 #endif
1003
1004 #if CONFIG_MLP_DEMUXER
1005 AVInputFormat mlp_demuxer = {
1006     "mlp",
1007     NULL_IF_CONFIG_SMALL("raw MLP"),
1008     0,
1009     NULL,
1010     audio_read_header,
1011     ff_raw_read_partial_packet,
1012     .flags= AVFMT_GENERIC_INDEX,
1013     .extensions = "mlp",
1014     .value = CODEC_ID_MLP,
1015 };
1016 #endif
1017
1018 #if CONFIG_MLP_MUXER
1019 AVOutputFormat mlp_muxer = {
1020     "mlp",
1021     NULL_IF_CONFIG_SMALL("raw MLP"),
1022     NULL,
1023     "mlp",
1024     0,
1025     CODEC_ID_MLP,
1026     CODEC_ID_NONE,
1027     NULL,
1028     raw_write_packet,
1029     .flags= AVFMT_NOTIMESTAMPS,
1030 };
1031 #endif
1032
1033 #if CONFIG_TRUEHD_DEMUXER
1034 AVInputFormat truehd_demuxer = {
1035     "truehd",
1036     NULL_IF_CONFIG_SMALL("raw TrueHD"),
1037     0,
1038     NULL,
1039     audio_read_header,
1040     ff_raw_read_partial_packet,
1041     .flags= AVFMT_GENERIC_INDEX,
1042     .extensions = "thd",
1043     .value = CODEC_ID_TRUEHD,
1044 };
1045 #endif
1046
1047 #if CONFIG_TRUEHD_MUXER
1048 AVOutputFormat truehd_muxer = {
1049     "truehd",
1050     NULL_IF_CONFIG_SMALL("raw TrueHD"),
1051     NULL,
1052     "thd",
1053     0,
1054     CODEC_ID_TRUEHD,
1055     CODEC_ID_NONE,
1056     NULL,
1057     raw_write_packet,
1058     .flags= AVFMT_NOTIMESTAMPS,
1059 };
1060 #endif
1061
1062 #if CONFIG_MPEG1VIDEO_MUXER
1063 AVOutputFormat mpeg1video_muxer = {
1064     "mpeg1video",
1065     NULL_IF_CONFIG_SMALL("raw MPEG-1 video"),
1066     "video/x-mpeg",
1067     "mpg,mpeg,m1v",
1068     0,
1069     CODEC_ID_NONE,
1070     CODEC_ID_MPEG1VIDEO,
1071     NULL,
1072     raw_write_packet,
1073     .flags= AVFMT_NOTIMESTAMPS,
1074 };
1075 #endif
1076
1077 #if CONFIG_MPEG2VIDEO_MUXER
1078 AVOutputFormat mpeg2video_muxer = {
1079     "mpeg2video",
1080     NULL_IF_CONFIG_SMALL("raw MPEG-2 video"),
1081     NULL,
1082     "m2v",
1083     0,
1084     CODEC_ID_NONE,
1085     CODEC_ID_MPEG2VIDEO,
1086     NULL,
1087     raw_write_packet,
1088     .flags= AVFMT_NOTIMESTAMPS,
1089 };
1090 #endif
1091
1092 #if CONFIG_MPEGVIDEO_DEMUXER
1093 AVInputFormat mpegvideo_demuxer = {
1094     "mpegvideo",
1095     NULL_IF_CONFIG_SMALL("raw MPEG video"),
1096     0,
1097     mpegvideo_probe,
1098     video_read_header,
1099     ff_raw_read_partial_packet,
1100     .flags= AVFMT_GENERIC_INDEX,
1101     .value = CODEC_ID_MPEG1VIDEO,
1102 };
1103 #endif
1104
1105 #if CONFIG_CAVSVIDEO_DEMUXER
1106 AVInputFormat cavsvideo_demuxer = {
1107     "cavsvideo",
1108     NULL_IF_CONFIG_SMALL("raw Chinese AVS video"),
1109     0,
1110     cavsvideo_probe,
1111     video_read_header,
1112     ff_raw_read_partial_packet,
1113     .flags= AVFMT_GENERIC_INDEX,
1114     .value = CODEC_ID_CAVS,
1115 };
1116 #endif
1117
1118 #if CONFIG_NULL_MUXER
1119 AVOutputFormat null_muxer = {
1120     "null",
1121     NULL_IF_CONFIG_SMALL("raw null video format"),
1122     NULL,
1123     NULL,
1124     0,
1125 #if HAVE_BIGENDIAN
1126     CODEC_ID_PCM_S16BE,
1127 #else
1128     CODEC_ID_PCM_S16LE,
1129 #endif
1130     CODEC_ID_RAWVIDEO,
1131     NULL,
1132     null_write_packet,
1133     .flags = AVFMT_NOFILE | AVFMT_RAWPICTURE | AVFMT_NOTIMESTAMPS,
1134 };
1135 #endif
1136
1137 #if CONFIG_RAWVIDEO_DEMUXER
1138 AVInputFormat rawvideo_demuxer = {
1139     "rawvideo",
1140     NULL_IF_CONFIG_SMALL("raw video format"),
1141     0,
1142     NULL,
1143     raw_read_header,
1144     rawvideo_read_packet,
1145     .flags= AVFMT_GENERIC_INDEX,
1146     .extensions = "yuv,cif,qcif,rgb",
1147     .value = CODEC_ID_RAWVIDEO,
1148 };
1149 #endif
1150
1151 #if CONFIG_RAWVIDEO_MUXER
1152 AVOutputFormat rawvideo_muxer = {
1153     "rawvideo",
1154     NULL_IF_CONFIG_SMALL("raw video format"),
1155     NULL,
1156     "yuv,rgb",
1157     0,
1158     CODEC_ID_NONE,
1159     CODEC_ID_RAWVIDEO,
1160     NULL,
1161     raw_write_packet,
1162     .flags= AVFMT_NOTIMESTAMPS,
1163 };
1164 #endif
1165
1166 #if CONFIG_ROQ_MUXER
1167 AVOutputFormat roq_muxer =
1168 {
1169     "RoQ",
1170     NULL_IF_CONFIG_SMALL("raw id RoQ format"),
1171     NULL,
1172     "roq",
1173     0,
1174     CODEC_ID_ROQ_DPCM,
1175     CODEC_ID_ROQ,
1176     roq_write_header,
1177     raw_write_packet,
1178 };
1179 #endif
1180
1181 #if CONFIG_SHORTEN_DEMUXER
1182 AVInputFormat shorten_demuxer = {
1183     "shn",
1184     NULL_IF_CONFIG_SMALL("raw Shorten"),
1185     0,
1186     NULL,
1187     audio_read_header,
1188     ff_raw_read_partial_packet,
1189     .flags= AVFMT_GENERIC_INDEX,
1190     .extensions = "shn",
1191     .value = CODEC_ID_SHORTEN,
1192 };
1193 #endif
1194
1195 #if CONFIG_VC1_DEMUXER
1196 AVInputFormat vc1_demuxer = {
1197     "vc1",
1198     NULL_IF_CONFIG_SMALL("raw VC-1"),
1199     0,
1200     NULL /* vc1_probe */,
1201     video_read_header,
1202     ff_raw_read_partial_packet,
1203     .extensions = "vc1",
1204     .value = CODEC_ID_VC1,
1205 };
1206 #endif
1207
1208 /* PCM formats */
1209
1210 #define PCMINPUTDEF(name, long_name, ext, codec) \
1211 AVInputFormat pcm_ ## name ## _demuxer = {\
1212     #name,\
1213     NULL_IF_CONFIG_SMALL(long_name),\
1214     0,\
1215     NULL,\
1216     raw_read_header,\
1217     raw_read_packet,\
1218     NULL,\
1219     pcm_read_seek,\
1220     .flags= AVFMT_GENERIC_INDEX,\
1221     .extensions = ext,\
1222     .value = codec,\
1223 };
1224
1225 #define PCMOUTPUTDEF(name, long_name, ext, codec) \
1226 AVOutputFormat pcm_ ## name ## _muxer = {\
1227     #name,\
1228     NULL_IF_CONFIG_SMALL(long_name),\
1229     NULL,\
1230     ext,\
1231     0,\
1232     codec,\
1233     CODEC_ID_NONE,\
1234     NULL,\
1235     raw_write_packet,\
1236     .flags= AVFMT_NOTIMESTAMPS,\
1237 };
1238
1239
1240 #if  !CONFIG_MUXERS && CONFIG_DEMUXERS
1241 #define PCMDEF(name, long_name, ext, codec) \
1242         PCMINPUTDEF(name, long_name, ext, codec)
1243 #elif CONFIG_MUXERS && !CONFIG_DEMUXERS
1244 #define PCMDEF(name, long_name, ext, codec) \
1245         PCMOUTPUTDEF(name, long_name, ext, codec)
1246 #elif CONFIG_MUXERS && CONFIG_DEMUXERS
1247 #define PCMDEF(name, long_name, ext, codec) \
1248         PCMINPUTDEF(name, long_name, ext, codec)\
1249         PCMOUTPUTDEF(name, long_name, ext, codec)
1250 #else
1251 #define PCMDEF(name, long_name, ext, codec)
1252 #endif
1253
1254 #if HAVE_BIGENDIAN
1255 #define BE_DEF(s) s
1256 #define LE_DEF(s) NULL
1257 #else
1258 #define BE_DEF(s) NULL
1259 #define LE_DEF(s) s
1260 #endif
1261
1262 PCMDEF(f64be, "PCM 64 bit floating-point big-endian format",
1263        NULL, CODEC_ID_PCM_F64BE)
1264
1265 PCMDEF(f64le, "PCM 64 bit floating-point little-endian format",
1266        NULL, CODEC_ID_PCM_F64LE)
1267
1268 PCMDEF(f32be, "PCM 32 bit floating-point big-endian format",
1269        NULL, CODEC_ID_PCM_F32BE)
1270
1271 PCMDEF(f32le, "PCM 32 bit floating-point little-endian format",
1272        NULL, CODEC_ID_PCM_F32LE)
1273
1274 PCMDEF(s32be, "PCM signed 32 bit big-endian format",
1275        NULL, CODEC_ID_PCM_S32BE)
1276
1277 PCMDEF(s32le, "PCM signed 32 bit little-endian format",
1278        NULL, CODEC_ID_PCM_S32LE)
1279
1280 PCMDEF(s24be, "PCM signed 24 bit big-endian format",
1281        NULL, CODEC_ID_PCM_S24BE)
1282
1283 PCMDEF(s24le, "PCM signed 24 bit little-endian format",
1284        NULL, CODEC_ID_PCM_S24LE)
1285
1286 PCMDEF(s16be, "PCM signed 16 bit big-endian format",
1287        BE_DEF("sw"), CODEC_ID_PCM_S16BE)
1288
1289 PCMDEF(s16le, "PCM signed 16 bit little-endian format",
1290        LE_DEF("sw"), CODEC_ID_PCM_S16LE)
1291
1292 PCMDEF(s8, "PCM signed 8 bit format",
1293        "sb", CODEC_ID_PCM_S8)
1294
1295 PCMDEF(u32be, "PCM unsigned 32 bit big-endian format",
1296        NULL, CODEC_ID_PCM_U32BE)
1297
1298 PCMDEF(u32le, "PCM unsigned 32 bit little-endian format",
1299        NULL, CODEC_ID_PCM_U32LE)
1300
1301 PCMDEF(u24be, "PCM unsigned 24 bit big-endian format",
1302        NULL, CODEC_ID_PCM_U24BE)
1303
1304 PCMDEF(u24le, "PCM unsigned 24 bit little-endian format",
1305        NULL, CODEC_ID_PCM_U24LE)
1306
1307 PCMDEF(u16be, "PCM unsigned 16 bit big-endian format",
1308        BE_DEF("uw"), CODEC_ID_PCM_U16BE)
1309
1310 PCMDEF(u16le, "PCM unsigned 16 bit little-endian format",
1311        LE_DEF("uw"), CODEC_ID_PCM_U16LE)
1312
1313 PCMDEF(u8, "PCM unsigned 8 bit format",
1314        "ub", CODEC_ID_PCM_U8)
1315
1316 PCMDEF(alaw, "PCM A-law format",
1317        "al", CODEC_ID_PCM_ALAW)
1318
1319 PCMDEF(mulaw, "PCM mu-law format",
1320        "ul", CODEC_ID_PCM_MULAW)