git.sesse.net Git - vlc/blob - modules/demux/wav/wav.c

   1 /*****************************************************************************
   2  * wav.c : wav file input module for vlc
   3  *****************************************************************************
   4  * Copyright (C) 2001 VideoLAN
   5  * $Id: wav.c,v 1.13 2003/02/27 13:19:43 gbazin Exp $
   6  * Authors: Laurent Aimar <fenrir@via.ecp.fr>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program 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
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  21  *****************************************************************************/
  22
  23 /*****************************************************************************
  24  * Preamble
  25  *****************************************************************************/
  26 #include <stdlib.h>                                      /* malloc(), free() */
  27 #include <string.h>                                              /* strdup() */
  28
  29 #include <vlc/vlc.h>
  30 #include <vlc/input.h>
  31
  32 #include <codecs.h>
  33 #include "wav.h"
  34
  35 /*****************************************************************************
  36  * Local prototypes
  37  *****************************************************************************/
  38 static int    WAVInit       ( vlc_object_t * );
  39 static void __WAVEnd        ( vlc_object_t * );
  40 static int    WAVDemux      ( input_thread_t * );
  41 static int    WAVCallDemux  ( input_thread_t * );
  42
  43 #define WAVEnd(a) __WAVEnd(VLC_OBJECT(a))
  44
  45 /*****************************************************************************
  46  * Module descriptor
  47  *****************************************************************************/
  48 vlc_module_begin();
  49     set_description( _("WAV demuxer") );
  50     set_capability( "demux", 142 );
  51     set_callbacks( WAVInit, __WAVEnd );
  52 vlc_module_end();
  53
  54 /*****************************************************************************
  55  * Declaration of local function
  56  *****************************************************************************/
  57
  58 #define FREE( p ) if( p ) free( p ); (p) = NULL
  59
  60 #define __EVEN( x ) ( (x)%2 != 0 ) ? ((x)+1) : (x)
  61
  62 /* Some functions to manipulate memory */
  63 static uint16_t GetWLE( uint8_t *p_buff )
  64 {
  65     return( (p_buff[0]) + ( p_buff[1] <<8 ) );
  66 }
  67
  68 static uint32_t GetDWLE( uint8_t *p_buff )
  69 {
  70     return( p_buff[0] + ( p_buff[1] <<8 ) +
  71             ( p_buff[2] <<16 ) + ( p_buff[3] <<24 ) );
  72 }
  73
  74 static uint32_t CreateDWLE( int a, int b, int c, int d )
  75 {
  76     return( a + ( b << 8 ) + ( c << 16 ) + ( d << 24 ) );
  77 }
  78
  79
  80 static off_t TellAbsolute( input_thread_t *p_input )
  81 {
  82     off_t i_pos;
  83
  84     vlc_mutex_lock( &p_input->stream.stream_lock );
  85
  86     i_pos= p_input->stream.p_selected_area->i_tell;
  87
  88     vlc_mutex_unlock( &p_input->stream.stream_lock );
  89
  90     return( i_pos );
  91 }
  92
  93 /* return 1 if success, 0 if fail */
  94 static int ReadData( input_thread_t *p_input, uint8_t *p_buff, int i_size )
  95 {
  96     data_packet_t *p_data;
  97
  98     int i_count = 0;
  99
 100     if( !i_size )
 101     {
 102         return( 0 );
 103     }
 104
 105     do
 106     {
 107         int i_read;
 108
 109         i_read = input_SplitBuffer(p_input, &p_data, __MIN( i_size, 1024 ) );
 110         if( i_read <= 0 )
 111         {
 112             return( i_count );
 113         }
 114         memcpy( p_buff, p_data->p_payload_start, i_read );
 115         input_DeletePacket( p_input->p_method_data, p_data );
 116
 117         p_buff += i_read;
 118         i_size -= i_read;
 119         i_count += i_read;
 120
 121     } while( i_size );
 122
 123     return( i_count );
 124 }
 125
 126 static int SeekAbsolute( input_thread_t *p_input,
 127                          off_t i_pos)
 128 {
 129     int         i_skip;
 130 #if 0
 131     if( i_pos >= p_input->stream.p_selected_area->i_size )
 132     {
 133         return( 0 );
 134     }
 135 #endif
 136
 137     i_skip    = i_pos - TellAbsolute( p_input );
 138     if( i_skip == 0 )
 139     {
 140         return( VLC_SUCCESS );
 141     }
 142     if( i_skip < 0 && !p_input->stream.b_seekable )
 143     {
 144         return( VLC_EGENERIC );
 145     }
 146     else if( !p_input->stream.b_seekable ||
 147              ( i_skip > 0 && i_skip < 1024 && p_input->stream.i_method != INPUT_METHOD_FILE ) )
 148     {
 149         while( i_skip > 0 )
 150         {
 151             uint8_t dummy[1024];
 152             int     i_read;
 153
 154             i_read = ReadData( p_input, dummy, __MIN( i_skip, 1024 ) );
 155             if( i_read <= 0 )
 156             {
 157                 return( VLC_EGENERIC );
 158             }
 159             i_skip -= i_read;
 160         }
 161         return( VLC_SUCCESS );
 162     }
 163     else
 164     {
 165             input_AccessReinit( p_input );
 166             p_input->pf_seek( p_input, i_pos );
 167             return( VLC_SUCCESS );
 168     }
 169 }
 170
 171 static int SkipBytes( input_thread_t *p_input, int i_skip )
 172 {
 173     return( SeekAbsolute( p_input, TellAbsolute( p_input ) + i_skip ) );
 174 }
 175
 176 static int ReadPES( input_thread_t *p_input,
 177                     pes_packet_t **pp_pes,
 178                     int i_size )
 179 {
 180     pes_packet_t *p_pes;
 181
 182     *pp_pes = NULL;
 183
 184     if( !(p_pes = input_NewPES( p_input->p_method_data )) )
 185     {
 186         msg_Err( p_input, "cannot allocate new PES" );
 187         return( 0 );
 188     }
 189
 190     while( i_size > 0 )
 191     {
 192         data_packet_t   *p_data;
 193         int i_read;
 194
 195         if( (i_read = input_SplitBuffer( p_input,
 196                                          &p_data,
 197                                          __MIN( i_size, 1024 ) ) ) <= 0 )
 198         {
 199             input_DeletePES( p_input->p_method_data, p_pes );
 200             return( 0 );
 201         }
 202         if( !p_pes->p_first )
 203         {
 204             p_pes->p_first = p_data;
 205             p_pes->i_nb_data = 1;
 206             p_pes->i_pes_size = i_read;
 207         }
 208         else
 209         {
 210             p_pes->p_last->p_next  = p_data;
 211             p_pes->i_nb_data++;
 212             p_pes->i_pes_size += i_read;
 213         }
 214         p_pes->p_last  = p_data;
 215         i_size -= i_read;
 216     }
 217     *pp_pes = p_pes;
 218     return( 1 );
 219 }
 220
 221 static int FindTag( input_thread_t *p_input, uint32_t i_tag )
 222 {
 223     uint32_t   i_id;
 224     uint32_t   i_size;
 225     uint8_t    *p_peek;
 226
 227     for( ;; )
 228     {
 229
 230         if( input_Peek( p_input, &p_peek, 8 ) < 8 )
 231         {
 232             msg_Err( p_input, "cannot peek()" );
 233             return( 0 );
 234         }
 235
 236         i_id   = GetDWLE( p_peek );
 237         i_size = GetDWLE( p_peek + 4 );
 238
 239         msg_Dbg( p_input, "FindTag: tag:%4.4s size:%d", (char*)&i_id, i_size );
 240         if( i_id == i_tag )
 241         {
 242             /* Yes, we have found the good tag */
 243             return( 1 );
 244         }
 245         if( !SkipBytes( p_input, __EVEN( i_size ) + 8 ) )
 246         {
 247             return( 0 );
 248         }
 249     }
 250 }
 251
 252 static int LoadTag_fmt( input_thread_t *p_input,
 253                         demux_sys_t *p_demux )
 254 {
 255     uint8_t  *p_peek;
 256     uint32_t i_size;
 257     WAVEFORMATEX *p_wf;
 258
 259
 260     if( input_Peek( p_input, &p_peek , 8 ) < 8 )
 261     {
 262         return( 0 );
 263     }
 264
 265     p_demux->i_wf = i_size = GetDWLE( p_peek + 4 );
 266     SkipBytes( p_input, 8 );
 267     if( i_size < 16 )
 268     {
 269         SkipBytes( p_input, i_size );
 270         return( 0 );
 271     }
 272     p_wf = p_demux->p_wf = malloc( __MAX( i_size, sizeof( WAVEFORMATEX) ) );
 273     ReadData( p_input, (uint8_t*)p_wf, __EVEN( i_size ) );
 274
 275     p_wf->wFormatTag      = GetWLE( (uint8_t*)&p_demux->p_wf->wFormatTag );
 276     p_wf->nChannels       = GetWLE( (uint8_t*)&p_demux->p_wf->nChannels );
 277     p_wf->nSamplesPerSec  = GetWLE( (uint8_t*)&p_demux->p_wf->nSamplesPerSec );
 278     p_wf->nAvgBytesPerSec = GetWLE( (uint8_t*)&p_demux->p_wf->nAvgBytesPerSec );
 279     p_wf->nBlockAlign     = GetWLE( (uint8_t*)&p_demux->p_wf->nBlockAlign );
 280     p_wf->wBitsPerSample  = GetWLE( (uint8_t*)&p_demux->p_wf->wBitsPerSample );
 281     if( i_size >= sizeof( WAVEFORMATEX) )
 282     {
 283         p_wf->cbSize          = GetWLE( (uint8_t*)&p_demux->p_wf->cbSize );
 284     }
 285     else
 286     {
 287         p_wf->cbSize = 0;
 288     }
 289
 290     msg_Dbg( p_input, "loaded \"fmt \" chunk" );
 291     return( 1 );
 292 }
 293
 294 static int PCM_GetFrame( input_thread_t *p_input,
 295                          WAVEFORMATEX   *p_wf,
 296                          pes_packet_t   **pp_pes,
 297                          mtime_t        *pi_length )
 298 {
 299     int i_samples;
 300
 301     int i_bytes;
 302     int i_modulo;
 303
 304     /* read samples for 50ms of */
 305     i_samples = __MAX( p_wf->nSamplesPerSec / 20, 1 );
 306
 307
 308     *pi_length = (mtime_t)1000000 *
 309                  (mtime_t)i_samples /
 310                  (mtime_t)p_wf->nSamplesPerSec;
 311
 312     i_bytes = i_samples * p_wf->nChannels * ( (p_wf->wBitsPerSample + 7) / 8 );
 313
 314     if( p_wf->nBlockAlign > 0 )
 315     {
 316         if( ( i_modulo = i_bytes % p_wf->nBlockAlign ) != 0 )
 317         {
 318             i_bytes += p_wf->nBlockAlign - i_modulo;
 319         }
 320     }
 321
 322     return( ReadPES( p_input, pp_pes, i_bytes ) );
 323 }
 324
 325 static int MS_ADPCM_GetFrame( input_thread_t *p_input,
 326                               WAVEFORMATEX   *p_wf,
 327                               pes_packet_t   **pp_pes,
 328                               mtime_t        *pi_length )
 329 {
 330     int i_samples;
 331
 332     i_samples = 2 + 2 * ( p_wf->nBlockAlign -
 333                                 7 * p_wf->nChannels ) / p_wf->nChannels;
 334
 335     *pi_length = (mtime_t)1000000 *
 336                  (mtime_t)i_samples /
 337                  (mtime_t)p_wf->nSamplesPerSec;
 338
 339     return( ReadPES( p_input, pp_pes, p_wf->nBlockAlign ) );
 340 }
 341
 342 static int IMA_ADPCM_GetFrame( input_thread_t *p_input,
 343                                WAVEFORMATEX   *p_wf,
 344                                pes_packet_t   **pp_pes,
 345                                mtime_t        *pi_length )
 346 {
 347     int i_samples;
 348
 349     i_samples = 2 * ( p_wf->nBlockAlign -
 350                         4 * p_wf->nChannels ) / p_wf->nChannels;
 351
 352     *pi_length = (mtime_t)1000000 *
 353                  (mtime_t)i_samples /
 354                  (mtime_t)p_wf->nSamplesPerSec;
 355
 356     return( ReadPES( p_input, pp_pes, p_wf->nBlockAlign ) );
 357 }
 358
 359 /*****************************************************************************
 360  * WAVInit: check file and initializes structures
 361  *****************************************************************************/
 362 static int WAVInit( vlc_object_t * p_this )
 363 {
 364     input_thread_t *p_input = (input_thread_t *)p_this;
 365     uint8_t  *p_peek;
 366     uint32_t i_size;
 367
 368     demux_sys_t *p_demux;
 369
 370
 371
 372     /* Initialize access plug-in structures. */
 373     if( p_input->i_mtu == 0 )
 374     {
 375         /* Improve speed. */
 376         p_input->i_bufsize = INPUT_DEFAULT_BUFSIZE ;
 377     }
 378
 379     /* a little test to see if it's a wav file */
 380     if( input_Peek( p_input, &p_peek, 12 ) < 12 )
 381     {
 382         msg_Warn( p_input, "WAV plugin discarded (cannot peek)" );
 383         return( -1 );
 384     }
 385
 386     if( ( GetDWLE( p_peek ) != CreateDWLE( 'R', 'I', 'F', 'F' ) )||
 387         ( GetDWLE( p_peek + 8 ) != CreateDWLE( 'W', 'A', 'V', 'E' ) ) )
 388     {
 389         msg_Warn( p_input, "WAV plugin discarded (not a valid file)" );
 390         return( -1 );
 391     }
 392     i_size = GetDWLE( p_peek + 4 );
 393     SkipBytes( p_input, 12 );
 394
 395     if( !FindTag( p_input, CreateDWLE( 'f', 'm', 't' ,' ' ) ) )
 396     {
 397         msg_Err( p_input, "cannot find \"fmt \" tag" );
 398         return( -1 );
 399     }
 400
 401     /* create our structure that will contains all data */
 402     if( !( p_input->p_demux_data =
 403                 p_demux = malloc( sizeof( demux_sys_t ) ) ) )
 404     {
 405         msg_Err( p_input, "out of memory" );
 406         return( -1 );
 407     }
 408     memset( p_demux, 0, sizeof( demux_sys_t ) );
 409
 410     /* Load WAVEFORMATEX header */
 411     if( !LoadTag_fmt( p_input, p_demux ) )
 412     {
 413         msg_Err( p_input, "cannot load \"fmt \" tag" );
 414         FREE( p_demux );
 415         return( -1 );
 416     }
 417     msg_Dbg( p_input, "format:0x%4.4x channels:%d %dHz %dKo/s blockalign:%d bits/samples:%d extra size:%d",
 418             p_demux->p_wf->wFormatTag,
 419             p_demux->p_wf->nChannels,
 420             p_demux->p_wf->nSamplesPerSec,
 421             p_demux->p_wf->nAvgBytesPerSec / 1024,
 422             p_demux->p_wf->nBlockAlign,
 423             p_demux->p_wf->wBitsPerSample,
 424             p_demux->p_wf->cbSize );
 425
 426     if( !FindTag( p_input, CreateDWLE( 'd', 'a', 't', 'a' ) ) )
 427     {
 428         msg_Err( p_input, "cannot find \"data\" tag" );
 429         FREE( p_demux->p_wf );
 430         FREE( p_demux );
 431         return( -1 );
 432     }
 433     if( input_Peek( p_input, &p_peek, 8 ) < 8 )
 434     {
 435         msg_Warn( p_input, "WAV plugin discarded (cannot peek)" );
 436         FREE( p_demux->p_wf );
 437         FREE( p_demux );
 438         return( -1 );
 439     }
 440
 441     p_demux->i_data_pos = TellAbsolute( p_input ) + 8;
 442     p_demux->i_data_size = GetDWLE( p_peek + 4 );
 443     SkipBytes( p_input, 8 );
 444
 445     /* XXX p_demux->psz_demux shouldn't be NULL ! */
 446     switch( p_demux->p_wf->wFormatTag )
 447     {
 448         case( WAVE_FORMAT_PCM ):
 449             msg_Dbg( p_input,"found raw pcm audio format" );
 450             p_demux->i_fourcc = VLC_FOURCC( 'a', 'r', 'a', 'w' );
 451             p_demux->GetFrame = PCM_GetFrame;
 452             p_demux->psz_demux = strdup( "" );
 453             break;
 454         case( WAVE_FORMAT_MPEG ):
 455         case( WAVE_FORMAT_MPEGLAYER3 ):
 456             msg_Dbg( p_input, "found mpeg audio format" );
 457             p_demux->i_fourcc = VLC_FOURCC( 'm', 'p', 'g', 'a' );
 458             p_demux->GetFrame = NULL;
 459             p_demux->psz_demux = strdup( "mpegaudio" );
 460             break;
 461         case( WAVE_FORMAT_A52 ):
 462             msg_Dbg( p_input,"found a52 audio format" );
 463             p_demux->i_fourcc = VLC_FOURCC( 'a', '5', '2', ' ' );
 464             p_demux->GetFrame = NULL;
 465             p_demux->psz_demux = strdup( "a52" );
 466             break;
 467         case( WAVE_FORMAT_ADPCM ):
 468             msg_Dbg( p_input, "found ms adpcm audio format" );
 469             p_demux->i_fourcc = VLC_FOURCC( 'm', 's', 0x00, 0x02 );
 470             p_demux->GetFrame = MS_ADPCM_GetFrame;
 471             p_demux->psz_demux = strdup( "" );
 472             break;
 473         case( WAVE_FORMAT_IMA_ADPCM ):
 474             msg_Dbg( p_input, "found ima adpcm audio format" );
 475             p_demux->i_fourcc = VLC_FOURCC( 'm', 's', 0x00, 0x11 );
 476             p_demux->GetFrame = IMA_ADPCM_GetFrame;
 477             p_demux->psz_demux = strdup( "" );
 478             break;
 479         default:
 480             msg_Warn( p_input,"unrecognize audio format(0x%x)",
 481                       p_demux->p_wf->wFormatTag );
 482             p_demux->i_fourcc =
 483                 VLC_FOURCC( 'm', 's',
 484                             (p_demux->p_wf->wFormatTag >> 8)&0xff,
 485                             (p_demux->p_wf->wFormatTag )&0xff);
 486             p_demux->GetFrame = NULL;
 487             p_demux->psz_demux = strdup( "" );
 488             break;
 489     }
 490
 491     if( p_demux->GetFrame )
 492     {
 493         msg_Dbg( p_input, "using internal demux" );
 494
 495         p_input->pf_demux = WAVDemux;
 496         p_input->p_demux_data = p_demux;
 497
 498         /*  create one program */
 499         vlc_mutex_lock( &p_input->stream.stream_lock );
 500         if( input_InitStream( p_input, 0 ) == -1)
 501         {
 502             vlc_mutex_unlock( &p_input->stream.stream_lock );
 503             msg_Err( p_input, "cannot init stream" );
 504             // FIXME
 505             return( -1 );
 506         }
 507         if( input_AddProgram( p_input, 0, 0) == NULL )
 508         {
 509             vlc_mutex_unlock( &p_input->stream.stream_lock );
 510             msg_Err( p_input, "cannot add program" );
 511             // FIXME
 512             return( -1 );
 513         }
 514         p_input->stream.p_selected_program = p_input->stream.pp_programs[0];
 515         p_input->stream.i_mux_rate = 0 ; /* FIXME */
 516
 517         p_demux->p_es = input_AddES( p_input,
 518                                      p_input->stream.p_selected_program, 1,
 519                                      0 );
 520         p_demux->p_es->i_stream_id = 1;
 521         p_demux->p_es->i_fourcc = p_demux->i_fourcc;
 522         p_demux->p_es->i_cat = AUDIO_ES;
 523         p_demux->p_es->p_waveformatex = malloc( p_demux->i_wf );
 524         memcpy( p_demux->p_es->p_waveformatex, p_demux->p_wf, p_demux->i_wf );
 525
 526         input_SelectES( p_input, p_demux->p_es );
 527
 528         p_input->stream.p_selected_program->b_is_ok = 1;
 529         vlc_mutex_unlock( &p_input->stream.stream_lock );
 530     }
 531     else
 532     {
 533         char *psz_sav;
 534         /* call an external demux */
 535         msg_Warn( p_input, "unsupported formattag, using external demux" );
 536
 537         psz_sav = p_input->psz_demux;
 538         p_input->psz_demux = p_demux->psz_demux;
 539
 540         p_demux->p_demux = module_Need( p_input, "demux", NULL );
 541
 542         p_input->psz_demux = psz_sav;
 543
 544         if( !p_demux->p_demux )
 545         {
 546             msg_Err( p_input,
 547                      "cannot get external demux for formattag 0x%x",
 548                      p_demux->p_wf->wFormatTag );
 549             FREE( p_demux->psz_demux );
 550             FREE( p_demux->p_wf );
 551             FREE( p_demux );
 552             return( -1 );
 553         }
 554         /* save value and switch back */
 555         p_demux->pf_demux = p_input->pf_demux;
 556         p_demux->p_demux_data = p_input->p_demux_data;
 557
 558         p_input->pf_demux = WAVCallDemux;
 559         p_input->p_demux_data = p_demux;
 560
 561     }
 562
 563     return( 0 );
 564 }
 565
 566 /*****************************************************************************
 567  * WAVCallDemux: call true demux
 568  *****************************************************************************
 569  * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
 570  *****************************************************************************/
 571 static int WAVCallDemux( input_thread_t *p_input )
 572 {
 573     demux_sys_t  *p_demux = p_input->p_demux_data;
 574     int i_status;
 575     char *psz_sav;
 576
 577     /* save context */
 578     psz_sav = p_input->psz_demux;
 579
 580     /* switch context */
 581     p_input->pf_demux = p_demux->pf_demux;
 582     p_input->p_demux_data = p_demux->p_demux_data;
 583     p_input->psz_demux = p_demux->psz_demux;
 584
 585     /* call demux */
 586     i_status = p_input->pf_demux( p_input );
 587
 588     /* save (new?) state */
 589     p_demux->pf_demux = p_input->pf_demux;
 590     p_demux->p_demux_data = p_input->p_demux_data;
 591
 592     /* switch back */
 593     p_input->psz_demux = psz_sav;
 594     p_input->pf_demux = WAVCallDemux;
 595     p_input->p_demux_data = p_demux;
 596
 597     return( i_status );
 598 }
 599
 600 /*****************************************************************************
 601  * WAVDemux: read packet and send them to decoders
 602  *****************************************************************************
 603  * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
 604  *****************************************************************************/
 605 static int WAVDemux( input_thread_t *p_input )
 606 {
 607     demux_sys_t  *p_demux = p_input->p_demux_data;
 608     pes_packet_t *p_pes;
 609     mtime_t      i_length;
 610
 611     if( p_input->stream.p_selected_program->i_synchro_state == SYNCHRO_REINIT )
 612     {
 613         off_t   i_offset;
 614
 615         i_offset = TellAbsolute( p_input ) - p_demux->i_data_pos;
 616         if( i_offset < 0 )
 617         {
 618             i_offset = 0;
 619         }
 620         if( p_demux->p_wf->nBlockAlign != 0 )
 621         {
 622             i_offset += p_demux->p_wf->nBlockAlign -
 623                                 i_offset % p_demux->p_wf->nBlockAlign;
 624         }
 625         SeekAbsolute( p_input, p_demux->i_data_pos + i_offset );
 626     }
 627
 628     input_ClockManageRef( p_input,
 629                           p_input->stream.p_selected_program,
 630                           p_demux->i_pcr );
 631
 632     if( TellAbsolute( p_input )
 633          >= (off_t)(p_demux->i_data_pos + p_demux->i_data_size) )
 634     {
 635         return( 0 ); // EOF
 636     }
 637
 638     if( !p_demux->GetFrame( p_input, p_demux->p_wf, &p_pes, &i_length ) )
 639     {
 640         msg_Warn( p_input, "failed to get one frame" );
 641         return( 0 );
 642     }
 643
 644     p_pes->i_dts =
 645         p_pes->i_pts = input_ClockGetTS( p_input,
 646                                          p_input->stream.p_selected_program,
 647                                          p_demux->i_pcr );
 648
 649     if( !p_demux->p_es->p_decoder_fifo )
 650     {
 651         msg_Err( p_input, "no audio decoder" );
 652         input_DeletePES( p_input->p_method_data, p_pes );
 653         return( -1 );
 654     }
 655     else
 656     {
 657         input_DecodePES( p_demux->p_es->p_decoder_fifo, p_pes );
 658     }
 659
 660     p_demux->i_pcr += i_length * 9 / 100;
 661     return( 1 );
 662 }
 663
 664 /*****************************************************************************
 665  * WAVEnd: frees unused data
 666  *****************************************************************************/
 667 static void __WAVEnd ( vlc_object_t * p_this )
 668 {
 669     input_thread_t *  p_input = (input_thread_t *)p_this;
 670     demux_sys_t *p_demux = p_input->p_demux_data;
 671
 672     FREE( p_demux->p_wf );
 673     FREE( p_demux->psz_demux );
 674
 675     if( p_demux->p_demux )
 676     {
 677         char *psz_sav;
 678
 679         /* save context */
 680         psz_sav = p_input->psz_demux;
 681
 682         /* switch context */
 683         p_input->pf_demux = p_demux->pf_demux;
 684         p_input->p_demux_data = p_demux->p_demux_data;
 685         p_input->psz_demux = p_demux->psz_demux;
 686
 687         /* unload module */
 688         module_Unneed( p_input, p_demux->p_demux );
 689
 690         /* switch back */
 691         p_input->psz_demux = psz_sav;
 692         p_input->p_demux_data = p_demux;
 693     }
 694
 695     FREE( p_input->p_demux_data );
 696 }
 697