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     short 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     case VLC_FOURCC('a','t','r','c'):
 182     case VLC_FOURCC('s','i','p','r'):
 183         break;
 184
 185     default:
 186         return VLC_EGENERIC;
 187     }
 188
 189     /* Channel detection */
 190     if( p_dec->fmt_in.audio.i_channels <= 0 ||
 191         p_dec->fmt_in.audio.i_channels > 6 )
 192     {
 193         msg_Err( p_dec, "invalid number of channels (not between 1 and 6): %i",
 194                  p_dec->fmt_in.audio.i_channels );
 195         return VLC_EGENERIC;
 196     }
 197
 198     p_dec->p_sys = p_sys = malloc( sizeof( decoder_sys_t ) );
 199     memset( p_sys, 0, sizeof(decoder_sys_t) );
 200
 201     /* Flavor for SIPR codecs */
 202     p_sys->i_codec_flavor = -1;
 203     if( p_dec->fmt_in.i_codec == VLC_FOURCC('s','i','p','r') )
 204     {
 205         p_sys->i_codec_flavor = p_dec->fmt_in.audio.i_flavor;
 206         msg_Dbg( p_dec, "Got sipr flavor %d", p_sys->i_codec_flavor );
 207     }
 208
 209     if( OpenDll( p_dec ) != VLC_SUCCESS )
 210     {
 211         free( p_sys );
 212         return VLC_EGENERIC;
 213     }
 214
 215 #ifdef LOADER
 216     if( p_sys->win32_dll ) Close( p_this );
 217 #endif
 218
 219     es_format_Init( &p_dec->fmt_out, AUDIO_ES, AOUT_FMT_S16_NE );
 220     p_dec->fmt_out.audio.i_rate = p_dec->fmt_in.audio.i_rate;
 221     p_dec->fmt_out.audio.i_channels = p_dec->fmt_in.audio.i_channels;
 222     p_dec->fmt_out.audio.i_bitspersample =
 223         p_dec->fmt_in.audio.i_bitspersample;
 224     p_dec->fmt_out.audio.i_physical_channels =
 225     p_dec->fmt_out.audio.i_original_channels =
 226         pi_channels_maps[p_dec->fmt_out.audio.i_channels];
 227
 228     aout_DateInit( &p_sys->end_date, p_dec->fmt_out.audio.i_rate );
 229     aout_DateSet( &p_sys->end_date, 0 );
 230
 231     p_dec->pf_decode_audio = Decode;
 232
 233     p_sys->p_out = malloc( 4096 * 10 );
 234     p_sys->i_out = 0;
 235
 236     return VLC_SUCCESS;
 237 }
 238
 239 /*****************************************************************************
 240  * Close:
 241  *****************************************************************************/
 242 static void Close( vlc_object_t *p_this )
 243 {
 244     decoder_t *p_dec = (decoder_t*)p_this;
 245
 246     CloseDll( p_dec );
 247     if( p_dec->p_sys->p_out ) free( p_dec->p_sys->p_out );
 248     free( p_dec->p_sys );
 249 }
 250
 251 /*****************************************************************************
 252  * OpenDll:
 253  *****************************************************************************/
 254 static int OpenDll( decoder_t *p_dec )
 255 {
 256     char *psz_dll;
 257     int i, i_result;
 258
 259     /** Find the good path for the dlls.**/
 260     char *ppsz_path[] =
 261     {
 262       ".",
 263 #ifndef WIN32
 264       "/usr/local/RealPlayer8/Codecs",
 265       "/usr/RealPlayer8/Codecs",
 266       "/usr/lib/RealPlayer8/Codecs",
 267       "/opt/RealPlayer8/Codecs",
 268       "/usr/lib/RealPlayer9/users/Real/Codecs",
 269       "/usr/lib/RealPlayer10/codecs",
 270       "/usr/lib/RealPlayer10GOLD/codecs",
 271       "/usr/lib/helix/player/codecs",
 272       "/usr/lib64/RealPlayer8/Codecs",
 273       "/usr/lib64/RealPlayer9/users/Real/Codecs",
 274       "/usr/lib64/RealPlayer10/codecs",
 275       "/usr/lib64/RealPlayer10GOLD/codecs",
 276       "/usr/lib/win32",
 277       "/usr/lib/codecs",
 278       "/usr/local/lib/codecs",
 279 #endif
 280       NULL,
 281       NULL,
 282       NULL
 283     };
 284
 285 #ifdef WIN32
 286     char psz_win32_real_codecs[MAX_PATH + 1];
 287     char psz_win32_helix_codecs[MAX_PATH + 1];
 288
 289     {
 290         HKEY h_key;
 291         DWORD i_type, i_data = MAX_PATH + 1, i_index = 1;
 292         char *p_data;
 293
 294         p_data = psz_win32_real_codecs;
 295         if( RegOpenKeyEx( HKEY_CLASSES_ROOT,
 296                           _T("Software\\RealNetworks\\Preferences\\DT_Codecs"),
 297                           0, KEY_READ, &h_key ) == ERROR_SUCCESS )
 298         {
 299              if( RegQueryValueEx( h_key, _T(""), 0, &i_type,
 300                                   (LPBYTE)p_data, &i_data ) == ERROR_SUCCESS &&
 301                  i_type == REG_SZ )
 302              {
 303                  int i_len = strlen( p_data );
 304                  if( i_len && p_data[i_len-1] == '\\' ) p_data[i_len-1] = 0;
 305                  ppsz_path[i_index++] = p_data;
 306                  msg_Err( p_dec, "Real: %s", p_data );
 307              }
 308              RegCloseKey( h_key );
 309         }
 310
 311         p_data = psz_win32_helix_codecs;
 312         if( RegOpenKeyEx( HKEY_CLASSES_ROOT,
 313                           _T("Helix\\HelixSDK\\10.0\\Preferences\\DT_Codecs"),
 314                           0, KEY_READ, &h_key ) == ERROR_SUCCESS )
 315         {
 316              if( RegQueryValueEx( h_key, _T(""), 0, &i_type,
 317                                   (LPBYTE)p_data, &i_data ) == ERROR_SUCCESS &&
 318                  i_type == REG_SZ )
 319              {
 320                  int i_len = strlen( p_data );
 321                  if( i_len && p_data[i_len-1] == '\\' ) p_data[i_len-1] = 0;
 322                  ppsz_path[i_index++] = p_data;
 323                  msg_Err( p_dec, "Real: %s", p_data );
 324              }
 325              RegCloseKey( h_key );
 326         }
 327     }
 328 #endif
 329
 330
 331     /** Try the native libraries first **/
 332 #ifndef WIN32
 333     for( i = 0; ppsz_path[i]; i++ )
 334     {
 335         /* Old format */
 336         asprintf( &psz_dll, "%s/%4.4s.so.6.0", ppsz_path[i],
 337                   (char *)&p_dec->fmt_in.i_codec );
 338         i_result = OpenNativeDll( p_dec, ppsz_path[i], psz_dll );
 339         free( psz_dll );
 340         if( i_result == VLC_SUCCESS ) return VLC_SUCCESS;
 341
 342         /* New format */
 343         asprintf( &psz_dll, "%s/%4.4s.so", ppsz_path[i],
 344                   (char *)&p_dec->fmt_in.i_codec );
 345         i_result = OpenNativeDll( p_dec, ppsz_path[i], psz_dll );
 346         free( psz_dll );
 347         if( i_result == VLC_SUCCESS ) return VLC_SUCCESS;
 348
 349     }
 350 #endif
 351
 352     /** Or use the WIN32 dlls **/
 353 #if defined(LOADER) || defined(WIN32)
 354     for( i = 0; ppsz_path[i]; i++ )
 355     {
 356         /* New format */
 357         asprintf( &psz_dll, "%s\\%4.4s.dll", ppsz_path[i],
 358                   (char *)&p_dec->fmt_in.i_codec );
 359         i_result = OpenWin32Dll( p_dec, ppsz_path[i], psz_dll );
 360         free( psz_dll );
 361         if( i_result == VLC_SUCCESS ) return VLC_SUCCESS;
 362
 363         /* Old format */
 364         asprintf( &psz_dll, "%s\\%4.4s3260.dll", ppsz_path[i],
 365                   (char *)&p_dec->fmt_in.i_codec );
 366         i_result = OpenWin32Dll( p_dec, ppsz_path[i], psz_dll );
 367         free( psz_dll );
 368         if( i_result == VLC_SUCCESS ) return VLC_SUCCESS;
 369     }
 370 #endif
 371
 372     return VLC_EGENERIC;
 373 }
 374
 375 static int OpenNativeDll( decoder_t *p_dec, char *psz_path, char *psz_dll )
 376 {
 377 #if defined(HAVE_DL_DLOPEN)
 378     decoder_sys_t *p_sys = p_dec->p_sys;
 379     void *handle = 0, *context = 0;
 380     unsigned int i_result;
 381     void *p_prop;
 382     int i_prop;
 383
 384     ra_init_t init_data =
 385     {
 386         p_dec->fmt_in.audio.i_rate,
 387         p_dec->fmt_in.audio.i_bitspersample,
 388         p_dec->fmt_in.audio.i_channels,
 389         100, /* quality */
 390         p_dec->fmt_in.audio.i_blockalign, /* subpacket size */
 391         p_dec->fmt_in.audio.i_blockalign, /* coded frame size */
 392         p_dec->fmt_in.i_extra, p_dec->fmt_in.p_extra
 393     };
 394
 395     msg_Dbg( p_dec, "opening library '%s'", psz_dll );
 396     if( !(handle = dlopen( psz_dll, RTLD_LAZY )) )
 397     {
 398         msg_Dbg( p_dec, "couldn't load library '%s' (%s)",
 399                  psz_dll, dlerror() );
 400         return VLC_EGENERIC;
 401     }
 402
 403     p_sys->raCloseCodec = dlsym( handle, "RACloseCodec" );
 404     p_sys->raDecode = dlsym( handle, "RADecode" );
 405     p_sys->raFlush = dlsym( handle, "RAFlush" );
 406     p_sys->raFreeDecoder = dlsym( handle, "RAFreeDecoder" );
 407     p_sys->raGetFlavorProperty = dlsym( handle, "RAGetFlavorProperty" );
 408     p_sys->raOpenCodec = dlsym( handle, "RAOpenCodec" );
 409     p_sys->raOpenCodec2 = dlsym( handle, "RAOpenCodec2" );
 410     p_sys->raInitDecoder = dlsym( handle, "RAInitDecoder" );
 411     p_sys->raSetFlavor = dlsym( handle, "RASetFlavor" );
 412     p_sys->raSetDLLAccessPath = dlsym( handle, "SetDLLAccessPath" );
 413     p_sys->raSetPwd = dlsym( handle, "RASetPwd" ); // optional, used by SIPR
 414
 415     if( !(p_sys->raOpenCodec || p_sys->raOpenCodec2) ||
 416         !p_sys->raCloseCodec || !p_sys->raInitDecoder ||
 417         !p_sys->raDecode || !p_sys->raFreeDecoder ||
 418         !p_sys->raGetFlavorProperty || !p_sys->raSetFlavor
 419         /* || !p_sys->raFlush || !p_sys->raSetDLLAccessPath */ )
 420     {
 421         goto error_native;
 422     }
 423
 424     if( p_sys->raOpenCodec2 )
 425         i_result = p_sys->raOpenCodec2( &context, psz_path );
 426     else
 427         i_result = p_sys->raOpenCodec( &context );
 428
 429     if( i_result )
 430     {
 431         msg_Err( p_dec, "decoder open failed, error code: 0x%x", i_result );
 432         goto error_native;
 433     }
 434
 435     i_result = p_sys->raInitDecoder( context, &init_data );
 436     if( i_result )
 437     {
 438         msg_Err( p_dec, "decoder init failed, error code: 0x%x", i_result );
 439         goto error_native;
 440     }
 441
 442     if( p_sys->i_codec_flavor >= 0 )
 443     {
 444         i_result = p_sys->raSetFlavor( context, p_sys->i_codec_flavor );
 445         if( i_result )
 446         {
 447             msg_Err( p_dec, "decoder flavor setup failed, error code: 0x%x",
 448                      i_result );
 449             goto error_native;
 450         }
 451
 452         p_prop = p_sys->raGetFlavorProperty( context, p_sys->i_codec_flavor,
 453                                              0, &i_prop );
 454         msg_Dbg( p_dec, "audio codec: [%d] %s",
 455                  p_sys->i_codec_flavor, (char *)p_prop );
 456
 457         p_prop = p_sys->raGetFlavorProperty( context, p_sys->i_codec_flavor,
 458                                              1, &i_prop );
 459         if( p_prop )
 460         {
 461             int i_bps = ((*((int*)p_prop))+4)/8;
 462             msg_Dbg( p_dec, "audio bitrate: %5.3f kbit/s (%d bps)",
 463                      (*((int*)p_prop))*0.001f, i_bps );
 464         }
 465     }
 466
 467     p_sys->context = context;
 468     p_sys->dll = handle;
 469     return VLC_SUCCESS;
 470
 471  error_native:
 472     if( context ) p_sys->raFreeDecoder( context );
 473     if( context ) p_sys->raCloseCodec( context );
 474     dlclose( handle );
 475 #endif
 476
 477     return VLC_EGENERIC;
 478 }
 479
 480 static int OpenWin32Dll( decoder_t *p_dec, char *psz_path, char *psz_dll )
 481 {
 482 #if defined(LOADER) || defined(WIN32)
 483     decoder_sys_t *p_sys = p_dec->p_sys;
 484     void *handle = 0, *context = 0;
 485     unsigned int i_result;
 486     void *p_prop;
 487     int i_prop;
 488
 489     wra_init_t init_data =
 490     {
 491         p_dec->fmt_in.audio.i_rate,
 492         p_dec->fmt_in.audio.i_bitspersample,
 493         p_dec->fmt_in.audio.i_channels,
 494         100, /* quality */
 495         p_dec->fmt_in.audio.i_blockalign, /* subpacket size */
 496         p_dec->fmt_in.audio.i_blockalign, /* coded frame size */
 497         p_dec->fmt_in.i_extra, p_dec->fmt_in.p_extra
 498     };
 499
 500     msg_Dbg( p_dec, "opening win32 dll '%s'", psz_dll );
 501
 502 #ifdef LOADER
 503     Setup_LDT_Keeper();
 504 #endif
 505
 506     if( !(handle = LoadLibraryA( psz_dll )) )
 507     {
 508         msg_Dbg( p_dec, "couldn't load dll '%s'", psz_dll );
 509         return VLC_EGENERIC;
 510     }
 511
 512     p_sys->wraCloseCodec = GetProcAddress( handle, "RACloseCodec" );
 513     p_sys->wraDecode = GetProcAddress( handle, "RADecode" );
 514     p_sys->wraFlush = GetProcAddress( handle, "RAFlush" );
 515     p_sys->wraFreeDecoder = GetProcAddress( handle, "RAFreeDecoder" );
 516     p_sys->wraGetFlavorProperty =
 517         GetProcAddress( handle, "RAGetFlavorProperty" );
 518     p_sys->wraOpenCodec = GetProcAddress( handle, "RAOpenCodec" );
 519     p_sys->wraOpenCodec2 = GetProcAddress( handle, "RAOpenCodec2" );
 520     p_sys->wraInitDecoder = GetProcAddress( handle, "RAInitDecoder" );
 521     p_sys->wraSetFlavor = GetProcAddress( handle, "RASetFlavor" );
 522     p_sys->wraSetDLLAccessPath = GetProcAddress( handle, "SetDLLAccessPath" );
 523     p_sys->wraSetPwd =
 524         GetProcAddress( handle, "RASetPwd" ); // optional, used by SIPR
 525
 526     if( !(p_sys->wraOpenCodec || p_sys->wraOpenCodec2) ||
 527         !p_sys->wraCloseCodec || !p_sys->wraInitDecoder ||
 528         !p_sys->wraDecode || !p_sys->wraFreeDecoder ||
 529         !p_sys->wraGetFlavorProperty || !p_sys->wraSetFlavor
 530         /* || !p_sys->wraFlush || !p_sys->wraSetDLLAccessPath */ )
 531     {
 532         FreeLibrary( handle );
 533         return VLC_EGENERIC;
 534     }
 535
 536     if( p_sys->wraOpenCodec2 )
 537         i_result = p_sys->wraOpenCodec2( &context, psz_path );
 538     else
 539         i_result = p_sys->wraOpenCodec( &context );
 540
 541     if( i_result )
 542     {
 543         msg_Err( p_dec, "decoder open failed, error code: 0x%x", i_result );
 544         goto error_win32;
 545     }
 546
 547     i_result = p_sys->wraInitDecoder( context, &init_data );
 548     if( i_result )
 549     {
 550         msg_Err( p_dec, "decoder init failed, error code: 0x%x", i_result );
 551         goto error_win32;
 552     }
 553
 554     if( p_sys->i_codec_flavor >= 0 )
 555     {
 556         i_result = p_sys->wraSetFlavor( context, p_sys->i_codec_flavor );
 557         if( i_result )
 558         {
 559             msg_Err( p_dec, "decoder flavor setup failed, error code: 0x%x",
 560                      i_result );
 561             goto error_win32;
 562         }
 563
 564         p_prop = p_sys->wraGetFlavorProperty( context, p_sys->i_codec_flavor,
 565                                               0, &i_prop );
 566         msg_Dbg( p_dec, "audio codec: [%d] %s",
 567                  p_sys->i_codec_flavor, (char *)p_prop );
 568
 569         p_prop = p_sys->wraGetFlavorProperty( context, p_sys->i_codec_flavor,
 570                                               1, &i_prop );
 571         if( p_prop )
 572         {
 573             int i_bps = ((*((int*)p_prop))+4)/8;
 574             msg_Dbg( p_dec, "audio bitrate: %5.3f kbit/s (%d bps)",
 575                      (*((int*)p_prop))*0.001f, i_bps );
 576         }
 577     }
 578
 579     p_sys->context = context;
 580     p_sys->win32_dll = handle;
 581     return VLC_SUCCESS;
 582
 583  error_win32:
 584     if( context ) p_sys->wraFreeDecoder( context );
 585     if( context ) p_sys->wraCloseCodec( context );
 586     FreeLibrary( handle );
 587 #endif
 588
 589     return VLC_EGENERIC;
 590 }
 591
 592 /*****************************************************************************
 593  * CloseDll:
 594  *****************************************************************************/
 595 static void CloseDll( decoder_t *p_dec )
 596 {
 597     decoder_sys_t *p_sys = p_dec->p_sys;
 598
 599     if( p_sys->context && p_sys->dll )
 600     {
 601         p_sys->raFreeDecoder( p_sys->context );
 602         p_sys->raCloseCodec( p_sys->context );
 603     }
 604
 605     if( p_sys->context && p_sys->win32_dll )
 606     {
 607         p_sys->wraFreeDecoder( p_sys->context );
 608         p_sys->wraCloseCodec( p_sys->context );
 609     }
 610
 611 #if defined(HAVE_DL_DLOPEN)
 612     if( p_sys->dll ) dlclose( p_sys->dll );
 613 #endif
 614
 615 #if defined(LOADER) || defined(WIN32)
 616     if( p_sys->win32_dll ) FreeLibrary( p_sys->win32_dll );
 617
 618 #if 0 //def LOADER /* Segfaults */
 619     Restore_LDT_Keeper( p_sys->ldt_fs );
 620     msg_Dbg( p_dec, "Restore_LDT_Keeper" );
 621 #endif
 622 #endif
 623
 624     p_sys->dll = 0;
 625     p_sys->win32_dll = 0;
 626     p_sys->context = 0;
 627 }
 628
 629 /*****************************************************************************
 630  * DecodeAudio:
 631  *****************************************************************************/
 632 static aout_buffer_t *Decode( decoder_t *p_dec, block_t **pp_block )
 633 {
 634     decoder_sys_t *p_sys = p_dec->p_sys;
 635     aout_buffer_t *p_aout_buffer = 0;
 636     unsigned int i_result;
 637     int i_samples;
 638     block_t *p_block;
 639
 640 #ifdef LOADER
 641     if( !p_sys->win32_dll && !p_sys->dll )
 642     {
 643         /* We must do open and close in the same thread (unless we do
 644          * Setup_LDT_Keeper in the main thread before all others */
 645         if( OpenDll( p_dec ) != VLC_SUCCESS )
 646         {
 647             /* Fatal */
 648             p_dec->b_error = VLC_TRUE;
 649             return NULL;
 650         }
 651     }
 652 #endif
 653
 654     if( pp_block == NULL || *pp_block == NULL ) return NULL;
 655     p_block = *pp_block;
 656
 657     if( p_sys->dll )
 658         i_result = p_sys->raDecode( p_sys->context, (char *)p_block->p_buffer,
 659                                     (unsigned long)p_block->i_buffer,
 660                                     p_sys->p_out, &p_sys->i_out, -1 );
 661     else
 662         i_result = p_sys->wraDecode( 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
 666 #if 0
 667     msg_Err( p_dec, "decoded: %i samples (%i)",
 668              p_sys->i_out * 8 / p_dec->fmt_out.audio.i_bitspersample /
 669              p_dec->fmt_out.audio.i_channels, i_result );
 670 #endif
 671
 672     /* Date management */
 673     if( p_block->i_pts > 0 &&
 674         p_block->i_pts != aout_DateGet( &p_sys->end_date ) )
 675     {
 676         aout_DateSet( &p_sys->end_date, p_block->i_pts );
 677     }
 678
 679     if( !aout_DateGet( &p_sys->end_date ) )
 680     {
 681         /* We've just started the stream, wait for the first PTS. */
 682         if( p_block ) block_Release( p_block );
 683         return NULL;
 684     }
 685
 686     i_samples = p_sys->i_out * 8 /
 687         p_dec->fmt_out.audio.i_bitspersample /p_dec->fmt_out.audio.i_channels;
 688
 689     p_aout_buffer =
 690         p_dec->pf_aout_buffer_new( p_dec, i_samples );
 691     if( p_aout_buffer )
 692     {
 693         memcpy( p_aout_buffer->p_buffer, p_sys->p_out, p_sys->i_out );
 694
 695         /* Date management */
 696         p_aout_buffer->start_date = aout_DateGet( &p_sys->end_date );
 697         p_aout_buffer->end_date =
 698             aout_DateIncrement( &p_sys->end_date, i_samples );
 699     }
 700
 701     block_Release( p_block );
 702     *pp_block = 0;
 703     return p_aout_buffer;
 704 }