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 #include <vlc/vlc.h>
  26 #include <vlc_aout.h>
  27 #include <vlc_codec.h>
  28
  29 #ifdef LOADER
  30 /* Need the w32dll loader from mplayer */
  31 #   include <wine/winerror.h>
  32 #   include <ldt_keeper.h>
  33 #   include <wine/windef.h>
  34
  35 void *WINAPI LoadLibraryA( char *name );
  36 void *WINAPI GetProcAddress( void *handle, char *func );
  37 int WINAPI FreeLibrary( void *handle );
  38 #endif
  39
  40 #ifndef WINAPI
  41 #   define WINAPI
  42 #endif
  43
  44 #if defined(HAVE_DL_DLOPEN)
  45 #   if defined(HAVE_DLFCN_H) /* Linux, BSD, Hurd */
  46 #       include <dlfcn.h>
  47 #   endif
  48 #   if defined(HAVE_SYS_DL_H)
  49 #       include <sys/dl.h>
  50 #   endif
  51 #endif
  52
  53 /*****************************************************************************
  54  * Module descriptor
  55  *****************************************************************************/
  56 static int  Open ( vlc_object_t * );
  57 static void Close( vlc_object_t * );
  58
  59 vlc_module_begin();
  60     set_description( _("RealAudio library decoder") );
  61     set_capability( "decoder", 10 );
  62     set_category( CAT_INPUT );
  63     set_subcategory( SUBCAT_INPUT_VCODEC );
  64     set_callbacks( Open, Close );
  65 vlc_module_end();
  66
  67 /*****************************************************************************
  68  * Local prototypes
  69  *****************************************************************************/
  70 static int  OpenDll( decoder_t * );
  71 static int  OpenNativeDll( decoder_t *, char *, char * );
  72 static int  OpenWin32Dll( decoder_t *, char *, char * );
  73 static void CloseDll( decoder_t * );
  74
  75 static aout_buffer_t *Decode( decoder_t *, block_t ** );
  76
  77 struct decoder_sys_t
  78 {
  79     audio_date_t end_date;
  80
  81     /* Output buffer */
  82     char *p_out;
  83     unsigned int i_out;
  84
  85     /* Codec params */
  86     void *context;
  87     int i_codec_flavor;
  88
  89     void *dll;
  90     unsigned long (*raCloseCodec)(void*);
  91     unsigned long (*raDecode)(void*, char*, unsigned long, char*,
  92                               unsigned int*, long);
  93     unsigned long (*raFlush)(unsigned long, unsigned long, unsigned long);
  94     unsigned long (*raFreeDecoder)(void*);
  95     void*         (*raGetFlavorProperty)(void*, unsigned long,
  96                                          unsigned long, int*);
  97     unsigned long (*raInitDecoder)(void*, void*);
  98     unsigned long (*raOpenCodec)(void*);
  99     unsigned long (*raOpenCodec2)(void*, void*);
 100     unsigned long (*raSetFlavor)(void*, unsigned long);
 101     void          (*raSetDLLAccessPath)(char*);
 102     void          (*raSetPwd)(char*, char*);
 103
 104 #if defined(LOADER)
 105     ldt_fs_t *ldt_fs;
 106 #endif
 107
 108     void *win32_dll;
 109     unsigned long (WINAPI *wraCloseCodec)(void*);
 110     unsigned long (WINAPI *wraDecode)(void*, char*, unsigned long, char*,
 111                                       unsigned int*, long);
 112     unsigned long (WINAPI *wraFlush)(unsigned long, unsigned long,
 113                                      unsigned long);
 114     unsigned long (WINAPI *wraFreeDecoder)(void*);
 115     void*         (WINAPI *wraGetFlavorProperty)(void*, unsigned long,
 116                                                  unsigned long, int*);
 117     unsigned long (WINAPI *wraInitDecoder)(void*, void*);
 118     unsigned long (WINAPI *wraOpenCodec)(void*);
 119     unsigned long (WINAPI *wraOpenCodec2)(void*, void*);
 120     unsigned long (WINAPI *wraSetFlavor)(void*, unsigned long);
 121     void          (WINAPI *wraSetDLLAccessPath)(char*);
 122     void          (WINAPI *wraSetPwd)(char*, char*);
 123 };
 124
 125 /* linux dlls doesn't need packing */
 126 typedef struct /*__attribute__((__packed__))*/ {
 127     int samplerate;
 128     short bits;
 129     short channels;
 130     short quality;
 131     /* 2bytes padding here, by gcc */
 132     int bits_per_frame;
 133     int packetsize;
 134     int extradata_len;
 135     void* extradata;
 136 } ra_init_t;
 137
 138 /* windows dlls need packed structs (no padding) */
 139 typedef struct __attribute__((__packed__)) {
 140     int samplerate;
 141     short bits;
 142     short channels;
 143     short quality;
 144     int bits_per_frame;
 145     int packetsize;
 146     int extradata_len;
 147     void* extradata;
 148 } wra_init_t;
 149
 150 void *__builtin_new(unsigned long size) {return malloc(size);}
 151 void __builtin_delete(void *p) {free(p);}
 152
 153 static int pi_channels_maps[7] =
 154 {
 155     0,
 156     AOUT_CHAN_CENTER,
 157     AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT,
 158     AOUT_CHAN_CENTER | AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT,
 159     AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_REARLEFT
 160      | AOUT_CHAN_REARRIGHT,
 161     AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
 162      | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT,
 163     AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
 164      | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT | AOUT_CHAN_LFE
 165 };
 166
 167 /*****************************************************************************
 168  * Open: probe the decoder and return score
 169  *****************************************************************************
 170  * Tries to launch a decoder and return score so that the interface is able
 171  * to choose.
 172  *****************************************************************************/
 173 static int Open( vlc_object_t *p_this )
 174 {
 175     decoder_t *p_dec = (decoder_t*)p_this;
 176     decoder_sys_t *p_sys = p_dec->p_sys;
 177
 178     switch( p_dec->fmt_in.i_codec )
 179     {
 180     case VLC_FOURCC('c','o','o','k'):
 181         break;
 182
 183     default:
 184         return VLC_EGENERIC;
 185     }
 186
 187     if( p_dec->fmt_in.audio.i_channels <= 0 ||
 188         p_dec->fmt_in.audio.i_channels > 6 )
 189     {
 190         msg_Err( p_dec, "invalid number of channels (not between 1 and 6): %i",
 191                  p_dec->fmt_in.audio.i_channels );
 192         return VLC_EGENERIC;
 193     }
 194
 195     p_dec->p_sys = p_sys = malloc( sizeof( decoder_sys_t ) );
 196     memset( p_sys, 0, sizeof(decoder_sys_t) );
 197
 198     p_sys->i_codec_flavor = -1;
 199     if( p_dec->fmt_in.i_codec == VLC_FOURCC('s','i','p','r') )
 200     {
 201         if( p_dec->fmt_in.audio.i_bitspersample > 1531 )
 202             p_sys->i_codec_flavor = 3;
 203         else if( p_dec->fmt_in.audio.i_bitspersample > 937 )
 204             p_sys->i_codec_flavor = 1;
 205         else if( p_dec->fmt_in.audio.i_bitspersample > 719 )
 206             p_sys->i_codec_flavor = 0;
 207         else
 208             p_sys->i_codec_flavor = 2;
 209     }
 210
 211     if( OpenDll( p_dec ) != VLC_SUCCESS )
 212     {
 213         free( p_sys );
 214         return VLC_EGENERIC;
 215     }
 216
 217 #ifdef LOADER
 218     if( p_sys->win32_dll ) Close( p_this );
 219 #endif
 220
 221     es_format_Init( &p_dec->fmt_out, AUDIO_ES, AOUT_FMT_S16_NE );
 222     p_dec->fmt_out.audio.i_rate = p_dec->fmt_in.audio.i_rate;
 223     p_dec->fmt_out.audio.i_channels = p_dec->fmt_in.audio.i_channels;
 224     p_dec->fmt_out.audio.i_bitspersample =
 225         p_dec->fmt_in.audio.i_bitspersample;
 226     p_dec->fmt_out.audio.i_physical_channels =
 227     p_dec->fmt_out.audio.i_original_channels =
 228         pi_channels_maps[p_dec->fmt_out.audio.i_channels];
 229
 230     aout_DateInit( &p_sys->end_date, p_dec->fmt_out.audio.i_rate );
 231     aout_DateSet( &p_sys->end_date, 0 );
 232
 233     p_dec->pf_decode_audio = Decode;
 234
 235     p_sys->p_out = malloc( 4096 * 10 );
 236     p_sys->i_out = 0;
 237
 238     return VLC_SUCCESS;
 239 }
 240
 241 /*****************************************************************************
 242  * Close:
 243  *****************************************************************************/
 244 static void Close( vlc_object_t *p_this )
 245 {
 246     decoder_t *p_dec = (decoder_t*)p_this;
 247
 248     CloseDll( p_dec );
 249     if( p_dec->p_sys->p_out ) free( p_dec->p_sys->p_out );
 250     free( p_dec->p_sys );
 251 }
 252
 253 /*****************************************************************************
 254  * OpenDll:
 255  *****************************************************************************/
 256 static int OpenDll( decoder_t *p_dec )
 257 {
 258     char *psz_dll;
 259     int i, i_result;
 260
 261     char *ppsz_path[] =
 262     {
 263       ".",
 264 #ifndef WIN32
 265       "/usr/local/RealPlayer8/Codecs",
 266       "/usr/RealPlayer8/Codecs",
 267       "/usr/lib/RealPlayer8/Codecs",
 268       "/opt/RealPlayer8/Codecs",
 269       "/usr/lib/RealPlayer9/users/Real/Codecs",
 270       "/usr/lib/RealPlayer10/codecs",
 271       "/usr/lib/RealPlayer10GOLD/codecs",
 272       "/usr/lib/helix/player/codecs",
 273       "/usr/lib64/RealPlayer8/Codecs",
 274       "/usr/lib64/RealPlayer9/users/Real/Codecs",
 275       "/usr/lib64/RealPlayer10/codecs",
 276       "/usr/lib64/RealPlayer10GOLD/codecs",
 277       "/usr/lib/win32",
 278       "/usr/lib/codecs",
 279       "/usr/local/lib/codecs"
 280 #endif
 281       NULL,
 282       NULL,
 283       NULL
 284     };
 285
 286 #ifdef WIN32
 287     char psz_win32_real_codecs[MAX_PATH + 1];
 288     char psz_win32_helix_codecs[MAX_PATH + 1];
 289 #endif
 290
 291     for( i = 0; ppsz_path[i]; i++ )
 292     {
 293         asprintf( &psz_dll, "%s/%4.4s.so.6.0", ppsz_path[i],
 294                   (char *)&p_dec->fmt_in.i_codec );
 295         i_result = OpenNativeDll( p_dec, ppsz_path[i], psz_dll );
 296         free( psz_dll );
 297         if( i_result == VLC_SUCCESS ) return VLC_SUCCESS;
 298     }
 299
 300 #ifdef WIN32
 301     {
 302         HKEY h_key;
 303         DWORD i_type, i_data = MAX_PATH + 1, i_index = 1;
 304         char *p_data;
 305
 306         p_data = psz_win32_real_codecs;
 307         if( RegOpenKeyEx( HKEY_CLASSES_ROOT,
 308                           _T("Software\\RealNetworks\\Preferences\\DT_Codecs"),
 309                           0, KEY_READ, &h_key ) == ERROR_SUCCESS )
 310         {
 311              if( RegQueryValueEx( h_key, _T(""), 0, &i_type,
 312                                   (LPBYTE)p_data, &i_data ) == ERROR_SUCCESS &&
 313                  i_type == REG_SZ )
 314              {
 315                  int i_len = strlen( p_data );
 316                  if( i_len && p_data[i_len-1] == '\\' ) p_data[i_len-1] = 0;
 317                  ppsz_path[i_index++] = p_data;
 318                  msg_Err( p_dec, "Real: %s", p_data );
 319              }
 320              RegCloseKey( h_key );
 321         }
 322
 323         p_data = psz_win32_helix_codecs;
 324         if( RegOpenKeyEx( HKEY_CLASSES_ROOT,
 325                           _T("Helix\\HelixSDK\\10.0\\Preferences\\DT_Codecs"),
 326                           0, KEY_READ, &h_key ) == ERROR_SUCCESS )
 327         {
 328              if( RegQueryValueEx( h_key, _T(""), 0, &i_type,
 329                                   (LPBYTE)p_data, &i_data ) == ERROR_SUCCESS &&
 330                  i_type == REG_SZ )
 331              {
 332                  int i_len = strlen( p_data );
 333                  if( i_len && p_data[i_len-1] == '\\' ) p_data[i_len-1] = 0;
 334                  ppsz_path[i_index++] = p_data;
 335                  msg_Err( p_dec, "Real: %s", p_data );
 336              }
 337              RegCloseKey( h_key );
 338         }
 339     }
 340 #endif
 341
 342     for( i = 0; ppsz_path[i]; i++ )
 343     {
 344         /* New format */
 345         asprintf( &psz_dll, "%s\\%4.4s.dll", ppsz_path[i],
 346                   (char *)&p_dec->fmt_in.i_codec );
 347         i_result = OpenWin32Dll( p_dec, ppsz_path[i], psz_dll );
 348         free( psz_dll );
 349         if( i_result == VLC_SUCCESS ) return VLC_SUCCESS;
 350
 351         /* Old format */
 352         asprintf( &psz_dll, "%s\\%4.4s3260.dll", ppsz_path[i],
 353                   (char *)&p_dec->fmt_in.i_codec );
 354         i_result = OpenWin32Dll( p_dec, ppsz_path[i], psz_dll );
 355         free( psz_dll );
 356         if( i_result == VLC_SUCCESS ) return VLC_SUCCESS;
 357     }
 358
 359     return VLC_EGENERIC;
 360 }
 361
 362 static int OpenNativeDll( decoder_t *p_dec, char *psz_path, char *psz_dll )
 363 {
 364 #if defined(HAVE_DL_DLOPEN)
 365     decoder_sys_t *p_sys = p_dec->p_sys;
 366     void *handle = 0, *context = 0;
 367     unsigned int i_result;
 368     void *p_prop;
 369     int i_prop;
 370
 371     ra_init_t init_data =
 372     {
 373         p_dec->fmt_in.audio.i_rate,
 374         p_dec->fmt_in.audio.i_bitspersample,
 375         p_dec->fmt_in.audio.i_channels,
 376         100, /* quality */
 377         p_dec->fmt_in.audio.i_blockalign, /* subpacket size */
 378         p_dec->fmt_in.audio.i_blockalign, /* coded frame size */
 379         p_dec->fmt_in.i_extra, p_dec->fmt_in.p_extra
 380     };
 381
 382     msg_Dbg( p_dec, "opening library '%s'", psz_dll );
 383     if( !(handle = dlopen( psz_dll, RTLD_LAZY )) )
 384     {
 385         msg_Dbg( p_dec, "couldn't load library '%s' (%s)",
 386                  psz_dll, dlerror() );
 387         return VLC_EGENERIC;
 388     }
 389
 390     p_sys->raCloseCodec = dlsym( handle, "RACloseCodec" );
 391     p_sys->raDecode = dlsym( handle, "RADecode" );
 392     p_sys->raFlush = dlsym( handle, "RAFlush" );
 393     p_sys->raFreeDecoder = dlsym( handle, "RAFreeDecoder" );
 394     p_sys->raGetFlavorProperty = dlsym( handle, "RAGetFlavorProperty" );
 395     p_sys->raOpenCodec = dlsym( handle, "RAOpenCodec" );
 396     p_sys->raOpenCodec2 = dlsym( handle, "RAOpenCodec2" );
 397     p_sys->raInitDecoder = dlsym( handle, "RAInitDecoder" );
 398     p_sys->raSetFlavor = dlsym( handle, "RASetFlavor" );
 399     p_sys->raSetDLLAccessPath = dlsym( handle, "SetDLLAccessPath" );
 400     p_sys->raSetPwd = dlsym( handle, "RASetPwd" ); // optional, used by SIPR
 401
 402     if( !(p_sys->raOpenCodec || p_sys->raOpenCodec2) ||
 403         !p_sys->raCloseCodec || !p_sys->raInitDecoder ||
 404         !p_sys->raDecode || !p_sys->raFreeDecoder ||
 405         !p_sys->raGetFlavorProperty || !p_sys->raSetFlavor
 406         /* || !p_sys->raFlush || !p_sys->raSetDLLAccessPath */ )
 407     {
 408         goto error_native;
 409     }
 410
 411     if( p_sys->raOpenCodec2 )
 412         i_result = p_sys->raOpenCodec2( &context, psz_path );
 413     else
 414         i_result = p_sys->raOpenCodec( &context );
 415
 416     if( i_result )
 417     {
 418         msg_Err( p_dec, "decoder open failed, error code: 0x%x", i_result );
 419         goto error_native;
 420     }
 421
 422     i_result = p_sys->raInitDecoder( context, &init_data );
 423     if( i_result )
 424     {
 425         msg_Err( p_dec, "decoder init failed, error code: 0x%x", i_result );
 426         goto error_native;
 427     }
 428
 429     if( p_sys->i_codec_flavor >= 0 )
 430     {
 431         i_result = p_sys->raSetFlavor( context, p_sys->i_codec_flavor );
 432         if( i_result )
 433         {
 434             msg_Err( p_dec, "decoder flavor setup failed, error code: 0x%x",
 435                      i_result );
 436             goto error_native;
 437         }
 438
 439         p_prop = p_sys->raGetFlavorProperty( context, p_sys->i_codec_flavor,
 440                                              0, &i_prop );
 441         msg_Dbg( p_dec, "audio codec: [%d] %s",
 442                  p_sys->i_codec_flavor, (char *)p_prop );
 443
 444         p_prop = p_sys->raGetFlavorProperty( context, p_sys->i_codec_flavor,
 445                                              1, &i_prop );
 446         if( p_prop )
 447         {
 448             int i_bps = ((*((int*)p_prop))+4)/8;
 449             msg_Dbg( p_dec, "audio bitrate: %5.3f kbit/s (%d bps)",
 450                      (*((int*)p_prop))*0.001f, i_bps );
 451         }
 452     }
 453
 454     p_sys->context = context;
 455     p_sys->dll = handle;
 456     return VLC_SUCCESS;
 457
 458  error_native:
 459     if( context ) p_sys->raFreeDecoder( context );
 460     if( context ) p_sys->raCloseCodec( context );
 461     dlclose( handle );
 462 #endif
 463
 464     return VLC_EGENERIC;
 465 }
 466
 467 static int OpenWin32Dll( decoder_t *p_dec, char *psz_path, char *psz_dll )
 468 {
 469 #if defined(LOADER) || defined(WIN32)
 470     decoder_sys_t *p_sys = p_dec->p_sys;
 471     void *handle = 0, *context = 0;
 472     unsigned int i_result;
 473     void *p_prop;
 474     int i_prop;
 475
 476     wra_init_t init_data =
 477     {
 478         p_dec->fmt_in.audio.i_rate,
 479         p_dec->fmt_in.audio.i_bitspersample,
 480         p_dec->fmt_in.audio.i_channels,
 481         100, /* quality */
 482         p_dec->fmt_in.audio.i_blockalign, /* subpacket size */
 483         p_dec->fmt_in.audio.i_blockalign, /* coded frame size */
 484         p_dec->fmt_in.i_extra, p_dec->fmt_in.p_extra
 485     };
 486
 487     msg_Dbg( p_dec, "opening win32 dll '%s'", psz_dll );
 488
 489 #ifdef LOADER
 490     Setup_LDT_Keeper();
 491 #endif
 492
 493     if( !(handle = LoadLibraryA( psz_dll )) )
 494     {
 495         msg_Dbg( p_dec, "couldn't load dll '%s'", psz_dll );
 496         return VLC_EGENERIC;
 497     }
 498
 499     p_sys->wraCloseCodec = GetProcAddress( handle, "RACloseCodec" );
 500     p_sys->wraDecode = GetProcAddress( handle, "RADecode" );
 501     p_sys->wraFlush = GetProcAddress( handle, "RAFlush" );
 502     p_sys->wraFreeDecoder = GetProcAddress( handle, "RAFreeDecoder" );
 503     p_sys->wraGetFlavorProperty =
 504         GetProcAddress( handle, "RAGetFlavorProperty" );
 505     p_sys->wraOpenCodec = GetProcAddress( handle, "RAOpenCodec" );
 506     p_sys->wraOpenCodec2 = GetProcAddress( handle, "RAOpenCodec2" );
 507     p_sys->wraInitDecoder = GetProcAddress( handle, "RAInitDecoder" );
 508     p_sys->wraSetFlavor = GetProcAddress( handle, "RASetFlavor" );
 509     p_sys->wraSetDLLAccessPath = GetProcAddress( handle, "SetDLLAccessPath" );
 510     p_sys->wraSetPwd =
 511         GetProcAddress( handle, "RASetPwd" ); // optional, used by SIPR
 512
 513     if( !(p_sys->wraOpenCodec || p_sys->wraOpenCodec2) ||
 514         !p_sys->wraCloseCodec || !p_sys->wraInitDecoder ||
 515         !p_sys->wraDecode || !p_sys->wraFreeDecoder ||
 516         !p_sys->wraGetFlavorProperty || !p_sys->wraSetFlavor
 517         /* || !p_sys->wraFlush || !p_sys->wraSetDLLAccessPath */ )
 518     {
 519         FreeLibrary( handle );
 520         return VLC_EGENERIC;
 521     }
 522
 523     if( p_sys->wraOpenCodec2 )
 524         i_result = p_sys->wraOpenCodec2( &context, psz_path );
 525     else
 526         i_result = p_sys->wraOpenCodec( &context );
 527
 528     if( i_result )
 529     {
 530         msg_Err( p_dec, "decoder open failed, error code: 0x%x", i_result );
 531         goto error_win32;
 532     }
 533
 534     i_result = p_sys->wraInitDecoder( context, &init_data );
 535     if( i_result )
 536     {
 537         msg_Err( p_dec, "decoder init failed, error code: 0x%x", i_result );
 538         goto error_win32;
 539     }
 540
 541     if( p_sys->i_codec_flavor >= 0 )
 542     {
 543         i_result = p_sys->wraSetFlavor( context, p_sys->i_codec_flavor );
 544         if( i_result )
 545         {
 546             msg_Err( p_dec, "decoder flavor setup failed, error code: 0x%x",
 547                      i_result );
 548             goto error_win32;
 549         }
 550
 551         p_prop = p_sys->wraGetFlavorProperty( context, p_sys->i_codec_flavor,
 552                                               0, &i_prop );
 553         msg_Dbg( p_dec, "audio codec: [%d] %s",
 554                  p_sys->i_codec_flavor, (char *)p_prop );
 555
 556         p_prop = p_sys->wraGetFlavorProperty( context, p_sys->i_codec_flavor,
 557                                               1, &i_prop );
 558         if( p_prop )
 559         {
 560             int i_bps = ((*((int*)p_prop))+4)/8;
 561             msg_Dbg( p_dec, "audio bitrate: %5.3f kbit/s (%d bps)",
 562                      (*((int*)p_prop))*0.001f, i_bps );
 563         }
 564     }
 565
 566     p_sys->context = context;
 567     p_sys->win32_dll = handle;
 568     return VLC_SUCCESS;
 569
 570  error_win32:
 571     if( context ) p_sys->wraFreeDecoder( context );
 572     if( context ) p_sys->wraCloseCodec( context );
 573     FreeLibrary( handle );
 574 #endif
 575
 576     return VLC_EGENERIC;
 577 }
 578
 579 /*****************************************************************************
 580  * CloseDll:
 581  *****************************************************************************/
 582 static void CloseDll( decoder_t *p_dec )
 583 {
 584     decoder_sys_t *p_sys = p_dec->p_sys;
 585
 586     if( p_sys->context && p_sys->dll )
 587     {
 588         p_sys->raFreeDecoder( p_sys->context );
 589         p_sys->raCloseCodec( p_sys->context );
 590     }
 591
 592     if( p_sys->context && p_sys->win32_dll )
 593     {
 594         p_sys->wraFreeDecoder( p_sys->context );
 595         p_sys->wraCloseCodec( p_sys->context );
 596     }
 597
 598 #if defined(HAVE_DL_DLOPEN)
 599     if( p_sys->dll ) dlclose( p_sys->dll );
 600 #endif
 601
 602 #if defined(LOADER) || defined(WIN32)
 603     if( p_sys->win32_dll ) FreeLibrary( p_sys->win32_dll );
 604
 605 #if 0 //def LOADER /* Segfaults */
 606     Restore_LDT_Keeper( p_sys->ldt_fs );
 607     msg_Dbg( p_dec, "Restore_LDT_Keeper" );
 608 #endif
 609 #endif
 610
 611     p_sys->dll = 0;
 612     p_sys->win32_dll = 0;
 613     p_sys->context = 0;
 614 }
 615
 616 /*****************************************************************************
 617  * DecodeAudio:
 618  *****************************************************************************/
 619 static aout_buffer_t *Decode( decoder_t *p_dec, block_t **pp_block )
 620 {
 621     decoder_sys_t *p_sys = p_dec->p_sys;
 622     aout_buffer_t *p_aout_buffer = 0;
 623     unsigned int i_result;
 624     int i_samples;
 625     block_t *p_block;
 626
 627 #ifdef LOADER
 628     if( !p_sys->win32_dll && !p_sys->dll )
 629     {
 630         /* We must do open and close in the same thread (unless we do
 631          * Setup_LDT_Keeper in the main thread before all others */
 632         if( OpenDll( p_dec ) != VLC_SUCCESS )
 633         {
 634             /* Fatal */
 635             p_dec->b_error = VLC_TRUE;
 636             return NULL;
 637         }
 638     }
 639 #endif
 640
 641     if( pp_block == NULL || *pp_block == NULL ) return NULL;
 642     p_block = *pp_block;
 643
 644     if( p_sys->dll )
 645         i_result = p_sys->raDecode( p_sys->context, (char *)p_block->p_buffer,
 646                                     (unsigned long)p_block->i_buffer,
 647                                     p_sys->p_out, &p_sys->i_out, -1 );
 648     else
 649         i_result = p_sys->wraDecode( p_sys->context, (char *)p_block->p_buffer,
 650                                      (unsigned long)p_block->i_buffer,
 651                                      p_sys->p_out, &p_sys->i_out, -1 );
 652
 653 #if 0
 654     msg_Err( p_dec, "decoded: %i samples (%i)",
 655              p_sys->i_out * 8 / p_dec->fmt_out.audio.i_bitspersample /
 656              p_dec->fmt_out.audio.i_channels, i_result );
 657 #endif
 658
 659     /* Date management */
 660     if( p_block->i_pts > 0 &&
 661         p_block->i_pts != aout_DateGet( &p_sys->end_date ) )
 662     {
 663         aout_DateSet( &p_sys->end_date, p_block->i_pts );
 664     }
 665
 666     if( !aout_DateGet( &p_sys->end_date ) )
 667     {
 668         /* We've just started the stream, wait for the first PTS. */
 669         if( p_block ) block_Release( p_block );
 670         return NULL;
 671     }
 672
 673     i_samples = p_sys->i_out * 8 /
 674         p_dec->fmt_out.audio.i_bitspersample /p_dec->fmt_out.audio.i_channels;
 675
 676     p_aout_buffer =
 677         p_dec->pf_aout_buffer_new( p_dec, i_samples );
 678     if( p_aout_buffer )
 679     {
 680         memcpy( p_aout_buffer->p_buffer, p_sys->p_out, p_sys->i_out );
 681
 682         /* Date management */
 683         p_aout_buffer->start_date = aout_DateGet( &p_sys->end_date );
 684         p_aout_buffer->end_date =
 685             aout_DateIncrement( &p_sys->end_date, i_samples );
 686     }
 687
 688     block_Release( p_block );
 689     *pp_block = 0;
 690     return p_aout_buffer;
 691 }