git.sesse.net Git - vlc/blob - modules/codec/realaudio.c

   1 /*****************************************************************************
   2  * realaudio.c: a realaudio decoder that uses the realaudio library/dll
   3  *****************************************************************************
   4  * Copyright (C) 2005 the VideoLAN team
   5  * $Id$
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  20  *****************************************************************************/
  21
  22 /*****************************************************************************
  23  * Preamble
  24  *****************************************************************************/
  25 #ifdef HAVE_CONFIG_H
  26 # include "config.h"
  27 #endif
  28
  29 #include <vlc/vlc.h>
  30 #include <vlc_aout.h>
  31 #include <vlc_codec.h>
  32
  33 #ifdef LOADER
  34 /* Need the w32dll loader from mplayer */
  35 #   include <wine/winerror.h>
  36 #   include <ldt_keeper.h>
  37 #   include <wine/windef.h>
  38
  39 void *WINAPI LoadLibraryA( char *name );
  40 void *WINAPI GetProcAddress( void *handle, char *func );
  41 int WINAPI FreeLibrary( void *handle );
  42 #endif
  43
  44 #ifndef WINAPI
  45 #   define WINAPI
  46 #endif
  47
  48 #if defined(HAVE_DL_DLOPEN)
  49 #   if defined(HAVE_DLFCN_H) /* Linux, BSD, Hurd */
  50 #       include <dlfcn.h>
  51 #   endif
  52 #   if defined(HAVE_SYS_DL_H)
  53 #       include <sys/dl.h>
  54 #   endif
  55 #endif
  56
  57 /*****************************************************************************
  58  * Module descriptor
  59  *****************************************************************************/
  60 static int  Open ( vlc_object_t * );
  61 static void Close( vlc_object_t * );
  62
  63 vlc_module_begin();
  64     set_description( _("RealAudio library decoder") );
  65     set_capability( "decoder", 10 );
  66     set_category( CAT_INPUT );
  67     set_subcategory( SUBCAT_INPUT_VCODEC );
  68     set_callbacks( Open, Close );
  69 vlc_module_end();
  70
  71 /*****************************************************************************
  72  * Local prototypes
  73  *****************************************************************************/
  74 static int  OpenDll( decoder_t * );
  75 static int  OpenNativeDll( decoder_t *, char *, char * );
  76 static int  OpenWin32Dll( decoder_t *, char *, char * );
  77 static void CloseDll( decoder_t * );
  78
  79 static aout_buffer_t *Decode( decoder_t *, block_t ** );
  80
  81 struct decoder_sys_t
  82 {
  83     audio_date_t end_date;
  84
  85     /* Output buffer */
  86     char *p_out;
  87     unsigned int i_out;
  88
  89     /* Codec params */
  90     void *context;
  91     short int i_codec_flavor;
  92
  93     void *dll;
  94     unsigned long (*raCloseCodec)(void*);
  95     unsigned long (*raDecode)(void*, char*, unsigned long, char*,
  96                               unsigned int*, long);
  97     unsigned long (*raFlush)(unsigned long, unsigned long, unsigned long);
  98     unsigned long (*raFreeDecoder)(void*);
  99     void*         (*raGetFlavorProperty)(void*, unsigned long,
 100                                          unsigned long, int*);
 101     unsigned long (*raInitDecoder)(void*, void*);
 102     unsigned long (*raOpenCodec)(void*);
 103     unsigned long (*raOpenCodec2)(void*, void*);
 104     unsigned long (*raSetFlavor)(void*, unsigned long);
 105     void          (*raSetDLLAccessPath)(char*);
 106     void          (*raSetPwd)(char*, char*);
 107
 108 #if defined(LOADER)
 109     ldt_fs_t *ldt_fs;
 110 #endif
 111
 112     void *win32_dll;
 113     unsigned long (WINAPI *wraCloseCodec)(void*);
 114     unsigned long (WINAPI *wraDecode)(void*, char*, unsigned long, char*,
 115                                       unsigned int*, long);
 116     unsigned long (WINAPI *wraFlush)(unsigned long, unsigned long,
 117                                      unsigned long);
 118     unsigned long (WINAPI *wraFreeDecoder)(void*);
 119     void*         (WINAPI *wraGetFlavorProperty)(void*, unsigned long,
 120                                                  unsigned long, int*);
 121     unsigned long (WINAPI *wraInitDecoder)(void*, void*);
 122     unsigned long (WINAPI *wraOpenCodec)(void*);
 123     unsigned long (WINAPI *wraOpenCodec2)(void*, void*);
 124     unsigned long (WINAPI *wraSetFlavor)(void*, unsigned long);
 125     void          (WINAPI *wraSetDLLAccessPath)(char*);
 126     void          (WINAPI *wraSetPwd)(char*, char*);
 127 };
 128
 129 /* linux dlls doesn't need packing */
 130 typedef struct /*__attribute__((__packed__))*/ {
 131     int samplerate;
 132     short bits;
 133     short channels;
 134     short quality;
 135     /* 2bytes padding here, by gcc */
 136     int bits_per_frame;
 137     int packetsize;
 138     int extradata_len;
 139     void* extradata;
 140 } ra_init_t;
 141
 142 /* windows dlls need packed structs (no padding) */
 143 typedef struct __attribute__((__packed__)) {
 144     int samplerate;
 145     short bits;
 146     short channels;
 147     short quality;
 148     int bits_per_frame;
 149     int packetsize;
 150     int extradata_len;
 151     void* extradata;
 152 } wra_init_t;
 153
 154 void *__builtin_new(unsigned long size) {return malloc(size);}
 155 void __builtin_delete(void *p) {free(p);}
 156
 157 static int pi_channels_maps[7] =
 158 {
 159     0,
 160     AOUT_CHAN_CENTER,
 161     AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT,
 162     AOUT_CHAN_CENTER | AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT,
 163     AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_REARLEFT
 164      | AOUT_CHAN_REARRIGHT,
 165     AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
 166      | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT,
 167     AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
 168      | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT | AOUT_CHAN_LFE
 169 };
 170
 171 /*****************************************************************************
 172  * Open: probe the decoder and return score
 173  *****************************************************************************
 174  * Tries to launch a decoder and return score so that the interface is able
 175  * to choose.
 176  *****************************************************************************/
 177 static int Open( vlc_object_t *p_this )
 178 {
 179     decoder_t *p_dec = (decoder_t*)p_this;
 180     decoder_sys_t *p_sys = p_dec->p_sys;
 181
 182     switch( p_dec->fmt_in.i_codec )
 183     {
 184     case VLC_FOURCC('c','o','o','k'):
 185     case VLC_FOURCC('a','t','r','c'):
 186     case VLC_FOURCC('s','i','p','r'):
 187         break;
 188
 189     default:
 190         return VLC_EGENERIC;
 191     }
 192
 193     /* Channel detection */
 194     if( p_dec->fmt_in.audio.i_channels <= 0 ||
 195         p_dec->fmt_in.audio.i_channels > 6 )
 196     {
 197         msg_Err( p_dec, "invalid number of channels (not between 1 and 6): %i",
 198                  p_dec->fmt_in.audio.i_channels );
 199         return VLC_EGENERIC;
 200     }
 201
 202     p_dec->p_sys = p_sys = malloc( sizeof( decoder_sys_t ) );
 203     memset( p_sys, 0, sizeof(decoder_sys_t) );
 204
 205     /* Flavor for SIPR codecs */
 206     p_sys->i_codec_flavor = -1;
 207     if( p_dec->fmt_in.i_codec == VLC_FOURCC('s','i','p','r') )
 208     {
 209         p_sys->i_codec_flavor = p_dec->fmt_in.audio.i_flavor;
 210         msg_Dbg( p_dec, "Got sipr flavor %d", p_sys->i_codec_flavor );
 211     }
 212
 213     if( OpenDll( p_dec ) != VLC_SUCCESS )
 214     {
 215         free( p_sys );
 216         return VLC_EGENERIC;
 217     }
 218
 219 #ifdef LOADER
 220     if( p_sys->win32_dll ) Close( p_this );
 221 #endif
 222
 223     es_format_Init( &p_dec->fmt_out, AUDIO_ES, AOUT_FMT_S16_NE );
 224     p_dec->fmt_out.audio.i_rate = p_dec->fmt_in.audio.i_rate;
 225     p_dec->fmt_out.audio.i_channels = p_dec->fmt_in.audio.i_channels;
 226     p_dec->fmt_out.audio.i_bitspersample =
 227         p_dec->fmt_in.audio.i_bitspersample;
 228     p_dec->fmt_out.audio.i_physical_channels =
 229     p_dec->fmt_out.audio.i_original_channels =
 230         pi_channels_maps[p_dec->fmt_out.audio.i_channels];
 231
 232     aout_DateInit( &p_sys->end_date, p_dec->fmt_out.audio.i_rate );
 233     aout_DateSet( &p_sys->end_date, 0 );
 234
 235     p_dec->pf_decode_audio = Decode;
 236
 237     p_sys->p_out = malloc( 4096 * 10 );
 238     p_sys->i_out = 0;
 239
 240     return VLC_SUCCESS;
 241 }
 242
 243 /*****************************************************************************
 244  * Close:
 245  *****************************************************************************/
 246 static void Close( vlc_object_t *p_this )
 247 {
 248     decoder_t *p_dec = (decoder_t*)p_this;
 249
 250     CloseDll( p_dec );
 251     free( p_dec->p_sys->p_out );
 252     free( p_dec->p_sys );
 253 }
 254
 255 /*****************************************************************************
 256  * OpenDll:
 257  *****************************************************************************/
 258 static int OpenDll( decoder_t *p_dec )
 259 {
 260     char *psz_dll;
 261     int i, i_result;
 262
 263     /** Find the good path for the dlls.**/
 264     char *ppsz_path[] =
 265     {
 266       ".",
 267 #ifndef WIN32
 268       "/usr/local/RealPlayer8/Codecs",
 269       "/usr/RealPlayer8/Codecs",
 270       "/usr/lib/RealPlayer8/Codecs",
 271       "/opt/RealPlayer8/Codecs",
 272       "/usr/lib/RealPlayer9/users/Real/Codecs",
 273       "/usr/lib/RealPlayer10/codecs",
 274       "/usr/lib/RealPlayer10GOLD/codecs",
 275       "/usr/lib/helix/player/codecs",
 276       "/usr/lib64/RealPlayer8/Codecs",
 277       "/usr/lib64/RealPlayer9/users/Real/Codecs",
 278       "/usr/lib64/RealPlayer10/codecs",
 279       "/usr/lib64/RealPlayer10GOLD/codecs",
 280       "/usr/lib/win32",
 281       "/usr/lib/codecs",
 282       "/usr/local/lib/codecs",
 283 #endif
 284       NULL,
 285       NULL,
 286       NULL
 287     };
 288
 289 #ifdef WIN32
 290     char psz_win32_real_codecs[MAX_PATH + 1];
 291     char psz_win32_helix_codecs[MAX_PATH + 1];
 292
 293     {
 294         HKEY h_key;
 295         DWORD i_type, i_data = MAX_PATH + 1, i_index = 1;
 296         char *p_data;
 297
 298         p_data = psz_win32_real_codecs;
 299         if( RegOpenKeyEx( HKEY_CLASSES_ROOT,
 300                           _T("Software\\RealNetworks\\Preferences\\DT_Codecs"),
 301                           0, KEY_READ, &h_key ) == ERROR_SUCCESS )
 302         {
 303              if( RegQueryValueEx( h_key, _T(""), 0, &i_type,
 304                                   (LPBYTE)p_data, &i_data ) == ERROR_SUCCESS &&
 305                  i_type == REG_SZ )
 306              {
 307                  int i_len = strlen( p_data );
 308                  if( i_len && p_data[i_len-1] == '\\' ) p_data[i_len-1] = 0;
 309                  ppsz_path[i_index++] = p_data;
 310                  msg_Err( p_dec, "Real: %s", p_data );
 311              }
 312              RegCloseKey( h_key );
 313         }
 314
 315         p_data = psz_win32_helix_codecs;
 316         if( RegOpenKeyEx( HKEY_CLASSES_ROOT,
 317                           _T("Helix\\HelixSDK\\10.0\\Preferences\\DT_Codecs"),
 318                           0, KEY_READ, &h_key ) == ERROR_SUCCESS )
 319         {
 320              if( RegQueryValueEx( h_key, _T(""), 0, &i_type,
 321                                   (LPBYTE)p_data, &i_data ) == ERROR_SUCCESS &&
 322                  i_type == REG_SZ )
 323              {
 324                  int i_len = strlen( p_data );
 325                  if( i_len && p_data[i_len-1] == '\\' ) p_data[i_len-1] = 0;
 326                  ppsz_path[i_index++] = p_data;
 327                  msg_Err( p_dec, "Real: %s", p_data );
 328              }
 329              RegCloseKey( h_key );
 330         }
 331     }
 332 #endif
 333
 334
 335     /** Try the native libraries first **/
 336 #ifndef WIN32
 337     for( i = 0; ppsz_path[i]; i++ )
 338     {
 339         /* Old format */
 340         asprintf( &psz_dll, "%s/%4.4s.so.6.0", ppsz_path[i],
 341                   (char *)&p_dec->fmt_in.i_codec );
 342         i_result = OpenNativeDll( p_dec, ppsz_path[i], psz_dll );
 343         free( psz_dll );
 344         if( i_result == VLC_SUCCESS ) return VLC_SUCCESS;
 345
 346         /* New format */
 347         asprintf( &psz_dll, "%s/%4.4s.so", ppsz_path[i],
 348                   (char *)&p_dec->fmt_in.i_codec );
 349         i_result = OpenNativeDll( p_dec, ppsz_path[i], psz_dll );
 350         free( psz_dll );
 351         if( i_result == VLC_SUCCESS ) return VLC_SUCCESS;
 352
 353     }
 354 #endif
 355
 356     /** Or use the WIN32 dlls **/
 357 #if defined(LOADER) || defined(WIN32)
 358     for( i = 0; ppsz_path[i]; i++ )
 359     {
 360         /* New format */
 361         asprintf( &psz_dll, "%s\\%4.4s.dll", ppsz_path[i],
 362                   (char *)&p_dec->fmt_in.i_codec );
 363         i_result = OpenWin32Dll( p_dec, ppsz_path[i], psz_dll );
 364         free( psz_dll );
 365         if( i_result == VLC_SUCCESS ) return VLC_SUCCESS;
 366
 367         /* Old format */
 368         asprintf( &psz_dll, "%s\\%4.4s3260.dll", ppsz_path[i],
 369                   (char *)&p_dec->fmt_in.i_codec );
 370         i_result = OpenWin32Dll( p_dec, ppsz_path[i], psz_dll );
 371         free( psz_dll );
 372         if( i_result == VLC_SUCCESS ) return VLC_SUCCESS;
 373     }
 374 #endif
 375
 376     return VLC_EGENERIC;
 377 }
 378
 379 static int OpenNativeDll( decoder_t *p_dec, char *psz_path, char *psz_dll )
 380 {
 381 #if defined(HAVE_DL_DLOPEN)
 382     decoder_sys_t *p_sys = p_dec->p_sys;
 383     void *handle = 0, *context = 0;
 384     unsigned int i_result;
 385     void *p_prop;
 386     int i_prop;
 387
 388     ra_init_t init_data =
 389     {
 390         p_dec->fmt_in.audio.i_rate,
 391         p_dec->fmt_in.audio.i_bitspersample,
 392         p_dec->fmt_in.audio.i_channels,
 393         100, /* quality */
 394         p_dec->fmt_in.audio.i_blockalign, /* subpacket size */
 395         p_dec->fmt_in.audio.i_blockalign, /* coded frame size */
 396         p_dec->fmt_in.i_extra, p_dec->fmt_in.p_extra
 397     };
 398
 399     msg_Dbg( p_dec, "opening library '%s'", psz_dll );
 400     if( !(handle = dlopen( psz_dll, RTLD_LAZY )) )
 401     {
 402         msg_Dbg( p_dec, "couldn't load library '%s' (%s)",
 403                  psz_dll, dlerror() );
 404         return VLC_EGENERIC;
 405     }
 406
 407     p_sys->raCloseCodec = dlsym( handle, "RACloseCodec" );
 408     p_sys->raDecode = dlsym( handle, "RADecode" );
 409     p_sys->raFlush = dlsym( handle, "RAFlush" );
 410     p_sys->raFreeDecoder = dlsym( handle, "RAFreeDecoder" );
 411     p_sys->raGetFlavorProperty = dlsym( handle, "RAGetFlavorProperty" );
 412     p_sys->raOpenCodec = dlsym( handle, "RAOpenCodec" );
 413     p_sys->raOpenCodec2 = dlsym( handle, "RAOpenCodec2" );
 414     p_sys->raInitDecoder = dlsym( handle, "RAInitDecoder" );
 415     p_sys->raSetFlavor = dlsym( handle, "RASetFlavor" );
 416     p_sys->raSetDLLAccessPath = dlsym( handle, "SetDLLAccessPath" );
 417     p_sys->raSetPwd = dlsym( handle, "RASetPwd" ); // optional, used by SIPR
 418
 419     if( !(p_sys->raOpenCodec || p_sys->raOpenCodec2) ||
 420         !p_sys->raCloseCodec || !p_sys->raInitDecoder ||
 421         !p_sys->raDecode || !p_sys->raFreeDecoder ||
 422         !p_sys->raGetFlavorProperty || !p_sys->raSetFlavor
 423         /* || !p_sys->raFlush || !p_sys->raSetDLLAccessPath */ )
 424     {
 425         goto error_native;
 426     }
 427
 428     if( p_sys->raOpenCodec2 )
 429         i_result = p_sys->raOpenCodec2( &context, psz_path );
 430     else
 431         i_result = p_sys->raOpenCodec( &context );
 432
 433     if( i_result )
 434     {
 435         msg_Err( p_dec, "decoder open failed, error code: 0x%x", i_result );
 436         goto error_native;
 437     }
 438
 439     i_result = p_sys->raInitDecoder( context, &init_data );
 440     if( i_result )
 441     {
 442         msg_Err( p_dec, "decoder init failed, error code: 0x%x", i_result );
 443         goto error_native;
 444     }
 445
 446     if( p_sys->i_codec_flavor >= 0 )
 447     {
 448         i_result = p_sys->raSetFlavor( context, p_sys->i_codec_flavor );
 449         if( i_result )
 450         {
 451             msg_Err( p_dec, "decoder flavor setup failed, error code: 0x%x",
 452                      i_result );
 453             goto error_native;
 454         }
 455
 456         p_prop = p_sys->raGetFlavorProperty( context, p_sys->i_codec_flavor,
 457                                              0, &i_prop );
 458         msg_Dbg( p_dec, "audio codec: [%d] %s",
 459                  p_sys->i_codec_flavor, (char *)p_prop );
 460
 461         p_prop = p_sys->raGetFlavorProperty( context, p_sys->i_codec_flavor,
 462                                              1, &i_prop );
 463         if( p_prop )
 464         {
 465             int i_bps = ((*((int*)p_prop))+4)/8;
 466             msg_Dbg( p_dec, "audio bitrate: %5.3f kbit/s (%d bps)",
 467                      (*((int*)p_prop))*0.001f, i_bps );
 468         }
 469     }
 470
 471     p_sys->context = context;
 472     p_sys->dll = handle;
 473     return VLC_SUCCESS;
 474
 475  error_native:
 476     if( context ) p_sys->raFreeDecoder( context );
 477     if( context ) p_sys->raCloseCodec( context );
 478     dlclose( handle );
 479 #endif
 480
 481     return VLC_EGENERIC;
 482 }
 483
 484 static int OpenWin32Dll( decoder_t *p_dec, char *psz_path, char *psz_dll )
 485 {
 486 #if defined(LOADER) || defined(WIN32)
 487     decoder_sys_t *p_sys = p_dec->p_sys;
 488     void *handle = 0, *context = 0;
 489     unsigned int i_result;
 490     void *p_prop;
 491     int i_prop;
 492
 493     wra_init_t init_data =
 494     {
 495         p_dec->fmt_in.audio.i_rate,
 496         p_dec->fmt_in.audio.i_bitspersample,
 497         p_dec->fmt_in.audio.i_channels,
 498         100, /* quality */
 499         p_dec->fmt_in.audio.i_blockalign, /* subpacket size */
 500         p_dec->fmt_in.audio.i_blockalign, /* coded frame size */
 501         p_dec->fmt_in.i_extra, p_dec->fmt_in.p_extra
 502     };
 503
 504     msg_Dbg( p_dec, "opening win32 dll '%s'", psz_dll );
 505
 506 #ifdef LOADER
 507     Setup_LDT_Keeper();
 508 #endif
 509
 510     if( !(handle = LoadLibraryA( psz_dll )) )
 511     {
 512         msg_Dbg( p_dec, "couldn't load dll '%s'", psz_dll );
 513         return VLC_EGENERIC;
 514     }
 515
 516     p_sys->wraCloseCodec = GetProcAddress( handle, "RACloseCodec" );
 517     p_sys->wraDecode = GetProcAddress( handle, "RADecode" );
 518     p_sys->wraFlush = GetProcAddress( handle, "RAFlush" );
 519     p_sys->wraFreeDecoder = GetProcAddress( handle, "RAFreeDecoder" );
 520     p_sys->wraGetFlavorProperty =
 521         GetProcAddress( handle, "RAGetFlavorProperty" );
 522     p_sys->wraOpenCodec = GetProcAddress( handle, "RAOpenCodec" );
 523     p_sys->wraOpenCodec2 = GetProcAddress( handle, "RAOpenCodec2" );
 524     p_sys->wraInitDecoder = GetProcAddress( handle, "RAInitDecoder" );
 525     p_sys->wraSetFlavor = GetProcAddress( handle, "RASetFlavor" );
 526     p_sys->wraSetDLLAccessPath = GetProcAddress( handle, "SetDLLAccessPath" );
 527     p_sys->wraSetPwd =
 528         GetProcAddress( handle, "RASetPwd" ); // optional, used by SIPR
 529
 530     if( !(p_sys->wraOpenCodec || p_sys->wraOpenCodec2) ||
 531         !p_sys->wraCloseCodec || !p_sys->wraInitDecoder ||
 532         !p_sys->wraDecode || !p_sys->wraFreeDecoder ||
 533         !p_sys->wraGetFlavorProperty || !p_sys->wraSetFlavor
 534         /* || !p_sys->wraFlush || !p_sys->wraSetDLLAccessPath */ )
 535     {
 536         FreeLibrary( handle );
 537         return VLC_EGENERIC;
 538     }
 539
 540     if( p_sys->wraOpenCodec2 )
 541         i_result = p_sys->wraOpenCodec2( &context, psz_path );
 542     else
 543         i_result = p_sys->wraOpenCodec( &context );
 544
 545     if( i_result )
 546     {
 547         msg_Err( p_dec, "decoder open failed, error code: 0x%x", i_result );
 548         goto error_win32;
 549     }
 550
 551     i_result = p_sys->wraInitDecoder( context, &init_data );
 552     if( i_result )
 553     {
 554         msg_Err( p_dec, "decoder init failed, error code: 0x%x", i_result );
 555         goto error_win32;
 556     }
 557
 558     if( p_sys->i_codec_flavor >= 0 )
 559     {
 560         i_result = p_sys->wraSetFlavor( context, p_sys->i_codec_flavor );
 561         if( i_result )
 562         {
 563             msg_Err( p_dec, "decoder flavor setup failed, error code: 0x%x",
 564                      i_result );
 565             goto error_win32;
 566         }
 567
 568         p_prop = p_sys->wraGetFlavorProperty( context, p_sys->i_codec_flavor,
 569                                               0, &i_prop );
 570         msg_Dbg( p_dec, "audio codec: [%d] %s",
 571                  p_sys->i_codec_flavor, (char *)p_prop );
 572
 573         p_prop = p_sys->wraGetFlavorProperty( context, p_sys->i_codec_flavor,
 574                                               1, &i_prop );
 575         if( p_prop )
 576         {
 577             int i_bps = ((*((int*)p_prop))+4)/8;
 578             msg_Dbg( p_dec, "audio bitrate: %5.3f kbit/s (%d bps)",
 579                      (*((int*)p_prop))*0.001f, i_bps );
 580         }
 581     }
 582
 583     p_sys->context = context;
 584     p_sys->win32_dll = handle;
 585     return VLC_SUCCESS;
 586
 587  error_win32:
 588     if( context ) p_sys->wraFreeDecoder( context );
 589     if( context ) p_sys->wraCloseCodec( context );
 590     FreeLibrary( handle );
 591 #endif
 592
 593     return VLC_EGENERIC;
 594 }
 595
 596 /*****************************************************************************
 597  * CloseDll:
 598  *****************************************************************************/
 599 static void CloseDll( decoder_t *p_dec )
 600 {
 601     decoder_sys_t *p_sys = p_dec->p_sys;
 602
 603     if( p_sys->context && p_sys->dll )
 604     {
 605         p_sys->raFreeDecoder( p_sys->context );
 606         p_sys->raCloseCodec( p_sys->context );
 607     }
 608
 609     if( p_sys->context && p_sys->win32_dll )
 610     {
 611         p_sys->wraFreeDecoder( p_sys->context );
 612         p_sys->wraCloseCodec( p_sys->context );
 613     }
 614
 615 #if defined(HAVE_DL_DLOPEN)
 616     if( p_sys->dll ) dlclose( p_sys->dll );
 617 #endif
 618
 619 #if defined(LOADER) || defined(WIN32)
 620     if( p_sys->win32_dll ) FreeLibrary( p_sys->win32_dll );
 621
 622 #if 0 //def LOADER /* Segfaults */
 623     Restore_LDT_Keeper( p_sys->ldt_fs );
 624     msg_Dbg( p_dec, "Restore_LDT_Keeper" );
 625 #endif
 626 #endif
 627
 628     p_sys->dll = 0;
 629     p_sys->win32_dll = 0;
 630     p_sys->context = 0;
 631 }
 632
 633 /*****************************************************************************
 634  * DecodeAudio:
 635  *****************************************************************************/
 636 static aout_buffer_t *Decode( decoder_t *p_dec, block_t **pp_block )
 637 {
 638     decoder_sys_t *p_sys = p_dec->p_sys;
 639     aout_buffer_t *p_aout_buffer = 0;
 640     unsigned int i_result;
 641     int i_samples;
 642     block_t *p_block;
 643
 644 #ifdef LOADER
 645     if( !p_sys->win32_dll && !p_sys->dll )
 646     {
 647         /* We must do open and close in the same thread (unless we do
 648          * Setup_LDT_Keeper in the main thread before all others */
 649         if( OpenDll( p_dec ) != VLC_SUCCESS )
 650         {
 651             /* Fatal */
 652             p_dec->b_error = true;
 653             return NULL;
 654         }
 655     }
 656 #endif
 657
 658     if( pp_block == NULL || *pp_block == NULL ) return NULL;
 659     p_block = *pp_block;
 660
 661     if( p_sys->dll )
 662         i_result = p_sys->raDecode( p_sys->context, (char *)p_block->p_buffer,
 663                                     (unsigned long)p_block->i_buffer,
 664                                     p_sys->p_out, &p_sys->i_out, -1 );
 665     else
 666         i_result = p_sys->wraDecode( p_sys->context, (char *)p_block->p_buffer,
 667                                      (unsigned long)p_block->i_buffer,
 668                                      p_sys->p_out, &p_sys->i_out, -1 );
 669
 670 #if 0
 671     msg_Err( p_dec, "decoded: %i samples (%i)",
 672              p_sys->i_out * 8 / p_dec->fmt_out.audio.i_bitspersample /
 673              p_dec->fmt_out.audio.i_channels, i_result );
 674 #endif
 675
 676     /* Date management */
 677     if( p_block->i_pts > 0 &&
 678         p_block->i_pts != aout_DateGet( &p_sys->end_date ) )
 679     {
 680         aout_DateSet( &p_sys->end_date, p_block->i_pts );
 681     }
 682
 683     if( !aout_DateGet( &p_sys->end_date ) )
 684     {
 685         /* We've just started the stream, wait for the first PTS. */
 686         if( p_block ) block_Release( p_block );
 687         return NULL;
 688     }
 689
 690     i_samples = p_sys->i_out * 8 /
 691         p_dec->fmt_out.audio.i_bitspersample /p_dec->fmt_out.audio.i_channels;
 692
 693     p_aout_buffer =
 694         p_dec->pf_aout_buffer_new( p_dec, i_samples );
 695     if( p_aout_buffer )
 696     {
 697         memcpy( p_aout_buffer->p_buffer, p_sys->p_out, p_sys->i_out );
 698
 699         /* Date management */
 700         p_aout_buffer->start_date = aout_DateGet( &p_sys->end_date );
 701         p_aout_buffer->end_date =
 702             aout_DateIncrement( &p_sys->end_date, i_samples );
 703     }
 704
 705     block_Release( p_block );
 706     *pp_block = 0;
 707     return p_aout_buffer;
 708 }