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/lib64/RealPlayer8/Codecs",
 271       "/usr/lib64/RealPlayer9/users/Real/Codecs",
 272       "/usr/lib/win32",
 273 #endif
 274       NULL,
 275       NULL,
 276       NULL
 277     };
 278
 279 #ifdef WIN32
 280     char psz_win32_real_codecs[MAX_PATH + 1];
 281     char psz_win32_helix_codecs[MAX_PATH + 1];
 282 #endif
 283
 284     for( i = 0; ppsz_path[i]; i++ )
 285     {
 286         asprintf( &psz_dll, "%s/%4.4s.so.6.0", ppsz_path[i],
 287                   (char *)&p_dec->fmt_in.i_codec );
 288         i_result = OpenNativeDll( p_dec, ppsz_path[i], psz_dll );
 289         free( psz_dll );
 290         if( i_result == VLC_SUCCESS ) return VLC_SUCCESS;
 291     }
 292
 293 #ifdef WIN32
 294     {
 295         HKEY h_key;
 296         DWORD i_type, i_data = MAX_PATH + 1, i_index = 1;
 297         char *p_data;
 298
 299         p_data = psz_win32_real_codecs;
 300         if( RegOpenKeyEx( HKEY_CLASSES_ROOT,
 301                           _T("Software\\RealNetworks\\Preferences\\DT_Codecs"),
 302                           0, KEY_READ, &h_key ) == ERROR_SUCCESS )
 303         {
 304              if( RegQueryValueEx( h_key, _T(""), 0, &i_type,
 305                                   (LPBYTE)p_data, &i_data ) == ERROR_SUCCESS &&
 306                  i_type == REG_SZ )
 307              {
 308                  int i_len = strlen( p_data );
 309                  if( i_len && p_data[i_len-1] == '\\' ) p_data[i_len-1] = 0;
 310                  ppsz_path[i_index++] = p_data;
 311                  msg_Err( p_dec, "Real: %s", p_data );
 312              }
 313              RegCloseKey( h_key );
 314         }
 315
 316         p_data = psz_win32_helix_codecs;
 317         if( RegOpenKeyEx( HKEY_CLASSES_ROOT,
 318                           _T("Helix\\HelixSDK\\10.0\\Preferences\\DT_Codecs"),
 319                           0, KEY_READ, &h_key ) == ERROR_SUCCESS )
 320         {
 321              if( RegQueryValueEx( h_key, _T(""), 0, &i_type,
 322                                   (LPBYTE)p_data, &i_data ) == ERROR_SUCCESS &&
 323                  i_type == REG_SZ )
 324              {
 325                  int i_len = strlen( p_data );
 326                  if( i_len && p_data[i_len-1] == '\\' ) p_data[i_len-1] = 0;
 327                  ppsz_path[i_index++] = p_data;
 328                  msg_Err( p_dec, "Real: %s", p_data );
 329              }
 330              RegCloseKey( h_key );
 331         }
 332     }
 333 #endif
 334
 335     for( i = 0; ppsz_path[i]; i++ )
 336     {
 337         /* New format */
 338         asprintf( &psz_dll, "%s\\%4.4s.dll", ppsz_path[i],
 339                   (char *)&p_dec->fmt_in.i_codec );
 340         i_result = OpenWin32Dll( p_dec, ppsz_path[i], psz_dll );
 341         free( psz_dll );
 342         if( i_result == VLC_SUCCESS ) return VLC_SUCCESS;
 343
 344         /* Old format */
 345         asprintf( &psz_dll, "%s\\%4.4s3260.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
 352     return VLC_EGENERIC;
 353 }
 354
 355 static int OpenNativeDll( decoder_t *p_dec, char *psz_path, char *psz_dll )
 356 {
 357 #if defined(HAVE_DL_DLOPEN)
 358     decoder_sys_t *p_sys = p_dec->p_sys;
 359     void *handle = 0, *context = 0;
 360     unsigned int i_result;
 361     void *p_prop;
 362     int i_prop;
 363
 364     ra_init_t init_data =
 365     {
 366         p_dec->fmt_in.audio.i_rate,
 367         p_dec->fmt_in.audio.i_bitspersample,
 368         p_dec->fmt_in.audio.i_channels,
 369         100, /* quality */
 370         p_dec->fmt_in.audio.i_blockalign, /* subpacket size */
 371         p_dec->fmt_in.audio.i_blockalign, /* coded frame size */
 372         p_dec->fmt_in.i_extra, p_dec->fmt_in.p_extra
 373     };
 374
 375     msg_Dbg( p_dec, "opening library '%s'", psz_dll );
 376     if( !(handle = dlopen( psz_dll, RTLD_LAZY )) )
 377     {
 378         msg_Dbg( p_dec, "couldn't load library '%s' (%s)",
 379                  psz_dll, dlerror() );
 380         return VLC_EGENERIC;
 381     }
 382
 383     p_sys->raCloseCodec = dlsym( handle, "RACloseCodec" );
 384     p_sys->raDecode = dlsym( handle, "RADecode" );
 385     p_sys->raFlush = dlsym( handle, "RAFlush" );
 386     p_sys->raFreeDecoder = dlsym( handle, "RAFreeDecoder" );
 387     p_sys->raGetFlavorProperty = dlsym( handle, "RAGetFlavorProperty" );
 388     p_sys->raOpenCodec = dlsym( handle, "RAOpenCodec" );
 389     p_sys->raOpenCodec2 = dlsym( handle, "RAOpenCodec2" );
 390     p_sys->raInitDecoder = dlsym( handle, "RAInitDecoder" );
 391     p_sys->raSetFlavor = dlsym( handle, "RASetFlavor" );
 392     p_sys->raSetDLLAccessPath = dlsym( handle, "SetDLLAccessPath" );
 393     p_sys->raSetPwd = dlsym( handle, "RASetPwd" ); // optional, used by SIPR
 394
 395     if( !(p_sys->raOpenCodec || p_sys->raOpenCodec2) ||
 396         !p_sys->raCloseCodec || !p_sys->raInitDecoder ||
 397         !p_sys->raDecode || !p_sys->raFreeDecoder ||
 398         !p_sys->raGetFlavorProperty || !p_sys->raSetFlavor
 399         /* || !p_sys->raFlush || !p_sys->raSetDLLAccessPath */ )
 400     {
 401         goto error_native;
 402     }
 403
 404     if( p_sys->raOpenCodec2 )
 405         i_result = p_sys->raOpenCodec2( &context, psz_path );
 406     else
 407         i_result = p_sys->raOpenCodec( &context );
 408
 409     if( i_result )
 410     {
 411         msg_Err( p_dec, "decoder open failed, error code: 0x%x", i_result );
 412         goto error_native;
 413     }
 414
 415     i_result = p_sys->raInitDecoder( context, &init_data );
 416     if( i_result )
 417     {
 418         msg_Err( p_dec, "decoder init failed, error code: 0x%x", i_result );
 419         goto error_native;
 420     }
 421
 422     if( p_sys->i_codec_flavor >= 0 )
 423     {
 424         i_result = p_sys->raSetFlavor( context, p_sys->i_codec_flavor );
 425         if( i_result )
 426         {
 427             msg_Err( p_dec, "decoder flavor setup failed, error code: 0x%x",
 428                      i_result );
 429             goto error_native;
 430         }
 431
 432         p_prop = p_sys->raGetFlavorProperty( context, p_sys->i_codec_flavor,
 433                                              0, &i_prop );
 434         msg_Dbg( p_dec, "audio codec: [%d] %s",
 435                  p_sys->i_codec_flavor, (char *)p_prop );
 436
 437         p_prop = p_sys->raGetFlavorProperty( context, p_sys->i_codec_flavor,
 438                                              1, &i_prop );
 439         if( p_prop )
 440         {
 441             int i_bps = ((*((int*)p_prop))+4)/8;
 442             msg_Dbg( p_dec, "audio bitrate: %5.3f kbit/s (%d bps)",
 443                      (*((int*)p_prop))*0.001f, i_bps );
 444         }
 445     }
 446
 447     p_sys->context = context;
 448     p_sys->dll = handle;
 449     return VLC_SUCCESS;
 450
 451  error_native:
 452     if( context ) p_sys->raFreeDecoder( context );
 453     if( context ) p_sys->raCloseCodec( context );
 454     dlclose( handle );
 455 #endif
 456
 457     return VLC_EGENERIC;
 458 }
 459
 460 static int OpenWin32Dll( decoder_t *p_dec, char *psz_path, char *psz_dll )
 461 {
 462 #if defined(LOADER) || defined(WIN32)
 463     decoder_sys_t *p_sys = p_dec->p_sys;
 464     void *handle = 0, *context = 0;
 465     unsigned int i_result;
 466     void *p_prop;
 467     int i_prop;
 468
 469     wra_init_t init_data =
 470     {
 471         p_dec->fmt_in.audio.i_rate,
 472         p_dec->fmt_in.audio.i_bitspersample,
 473         p_dec->fmt_in.audio.i_channels,
 474         100, /* quality */
 475         p_dec->fmt_in.audio.i_blockalign, /* subpacket size */
 476         p_dec->fmt_in.audio.i_blockalign, /* coded frame size */
 477         p_dec->fmt_in.i_extra, p_dec->fmt_in.p_extra
 478     };
 479
 480     msg_Dbg( p_dec, "opening win32 dll '%s'", psz_dll );
 481
 482 #ifdef LOADER
 483     Setup_LDT_Keeper();
 484 #endif
 485
 486     if( !(handle = LoadLibraryA( psz_dll )) )
 487     {
 488         msg_Dbg( p_dec, "couldn't load dll '%s'", psz_dll );
 489         return VLC_EGENERIC;
 490     }
 491
 492     p_sys->wraCloseCodec = GetProcAddress( handle, "RACloseCodec" );
 493     p_sys->wraDecode = GetProcAddress( handle, "RADecode" );
 494     p_sys->wraFlush = GetProcAddress( handle, "RAFlush" );
 495     p_sys->wraFreeDecoder = GetProcAddress( handle, "RAFreeDecoder" );
 496     p_sys->wraGetFlavorProperty =
 497         GetProcAddress( handle, "RAGetFlavorProperty" );
 498     p_sys->wraOpenCodec = GetProcAddress( handle, "RAOpenCodec" );
 499     p_sys->wraOpenCodec2 = GetProcAddress( handle, "RAOpenCodec2" );
 500     p_sys->wraInitDecoder = GetProcAddress( handle, "RAInitDecoder" );
 501     p_sys->wraSetFlavor = GetProcAddress( handle, "RASetFlavor" );
 502     p_sys->wraSetDLLAccessPath = GetProcAddress( handle, "SetDLLAccessPath" );
 503     p_sys->wraSetPwd =
 504         GetProcAddress( handle, "RASetPwd" ); // optional, used by SIPR
 505
 506     if( !(p_sys->wraOpenCodec || p_sys->wraOpenCodec2) ||
 507         !p_sys->wraCloseCodec || !p_sys->wraInitDecoder ||
 508         !p_sys->wraDecode || !p_sys->wraFreeDecoder ||
 509         !p_sys->wraGetFlavorProperty || !p_sys->wraSetFlavor
 510         /* || !p_sys->wraFlush || !p_sys->wraSetDLLAccessPath */ )
 511     {
 512         FreeLibrary( handle );
 513         return VLC_EGENERIC;
 514     }
 515
 516     if( p_sys->wraOpenCodec2 )
 517         i_result = p_sys->wraOpenCodec2( &context, psz_path );
 518     else
 519         i_result = p_sys->wraOpenCodec( &context );
 520
 521     if( i_result )
 522     {
 523         msg_Err( p_dec, "decoder open failed, error code: 0x%x", i_result );
 524         goto error_win32;
 525     }
 526
 527     i_result = p_sys->wraInitDecoder( context, &init_data );
 528     if( i_result )
 529     {
 530         msg_Err( p_dec, "decoder init failed, error code: 0x%x", i_result );
 531         goto error_win32;
 532     }
 533
 534     if( p_sys->i_codec_flavor >= 0 )
 535     {
 536         i_result = p_sys->wraSetFlavor( context, p_sys->i_codec_flavor );
 537         if( i_result )
 538         {
 539             msg_Err( p_dec, "decoder flavor setup failed, error code: 0x%x",
 540                      i_result );
 541             goto error_win32;
 542         }
 543
 544         p_prop = p_sys->wraGetFlavorProperty( context, p_sys->i_codec_flavor,
 545                                               0, &i_prop );
 546         msg_Dbg( p_dec, "audio codec: [%d] %s",
 547                  p_sys->i_codec_flavor, (char *)p_prop );
 548
 549         p_prop = p_sys->wraGetFlavorProperty( context, p_sys->i_codec_flavor,
 550                                               1, &i_prop );
 551         if( p_prop )
 552         {
 553             int i_bps = ((*((int*)p_prop))+4)/8;
 554             msg_Dbg( p_dec, "audio bitrate: %5.3f kbit/s (%d bps)",
 555                      (*((int*)p_prop))*0.001f, i_bps );
 556         }
 557     }
 558
 559     p_sys->context = context;
 560     p_sys->win32_dll = handle;
 561     return VLC_SUCCESS;
 562
 563  error_win32:
 564     if( context ) p_sys->wraFreeDecoder( context );
 565     if( context ) p_sys->wraCloseCodec( context );
 566     FreeLibrary( handle );
 567 #endif
 568
 569     return VLC_EGENERIC;
 570 }
 571
 572 /*****************************************************************************
 573  * CloseDll:
 574  *****************************************************************************/
 575 static void CloseDll( decoder_t *p_dec )
 576 {
 577     decoder_sys_t *p_sys = p_dec->p_sys;
 578
 579     if( p_sys->context && p_sys->dll )
 580     {
 581         p_sys->raFreeDecoder( p_sys->context );
 582         p_sys->raCloseCodec( p_sys->context );
 583     }
 584
 585     if( p_sys->context && p_sys->win32_dll )
 586     {
 587         p_sys->wraFreeDecoder( p_sys->context );
 588         p_sys->wraCloseCodec( p_sys->context );
 589     }
 590
 591 #if defined(HAVE_DL_DLOPEN)
 592     if( p_sys->dll ) dlclose( p_sys->dll );
 593 #endif
 594
 595 #if defined(LOADER) || defined(WIN32)
 596     if( p_sys->win32_dll ) FreeLibrary( p_sys->win32_dll );
 597
 598 #if 0 //def LOADER /* Segfaults */
 599     Restore_LDT_Keeper( p_sys->ldt_fs );
 600     msg_Dbg( p_dec, "Restore_LDT_Keeper" );
 601 #endif
 602 #endif
 603
 604     p_sys->dll = 0;
 605     p_sys->win32_dll = 0;
 606     p_sys->context = 0;
 607 }
 608
 609 /*****************************************************************************
 610  * DecodeAudio:
 611  *****************************************************************************/
 612 static aout_buffer_t *Decode( decoder_t *p_dec, block_t **pp_block )
 613 {
 614     decoder_sys_t *p_sys = p_dec->p_sys;
 615     aout_buffer_t *p_aout_buffer = 0;
 616     unsigned int i_result;
 617     int i_samples;
 618     block_t *p_block;
 619
 620 #ifdef LOADER
 621     if( !p_sys->win32_dll && !p_sys->dll )
 622     {
 623         /* We must do open and close in the same thread (unless we do
 624          * Setup_LDT_Keeper in the main thread before all others */
 625         if( OpenDll( p_dec ) != VLC_SUCCESS )
 626         {
 627             /* Fatal */
 628             p_dec->b_error = VLC_TRUE;
 629             return NULL;
 630         }
 631     }
 632 #endif
 633
 634     if( pp_block == NULL || *pp_block == NULL ) return NULL;
 635     p_block = *pp_block;
 636
 637     if( p_sys->dll )
 638         i_result = p_sys->raDecode( p_sys->context, (char *)p_block->p_buffer,
 639                                     (unsigned long)p_block->i_buffer,
 640                                     p_sys->p_out, &p_sys->i_out, -1 );
 641     else
 642         i_result = p_sys->wraDecode( p_sys->context, (char *)p_block->p_buffer,
 643                                      (unsigned long)p_block->i_buffer,
 644                                      p_sys->p_out, &p_sys->i_out, -1 );
 645
 646 #if 0
 647     msg_Err( p_dec, "decoded: %i samples (%i)",
 648              p_sys->i_out * 8 / p_dec->fmt_out.audio.i_bitspersample /
 649              p_dec->fmt_out.audio.i_channels, i_result );
 650 #endif
 651
 652     /* Date management */
 653     if( p_block->i_pts > 0 &&
 654         p_block->i_pts != aout_DateGet( &p_sys->end_date ) )
 655     {
 656         aout_DateSet( &p_sys->end_date, p_block->i_pts );
 657     }
 658
 659     if( !aout_DateGet( &p_sys->end_date ) )
 660     {
 661         /* We've just started the stream, wait for the first PTS. */
 662         if( p_block ) block_Release( p_block );
 663         return NULL;
 664     }
 665
 666     i_samples = p_sys->i_out * 8 /
 667         p_dec->fmt_out.audio.i_bitspersample /p_dec->fmt_out.audio.i_channels;
 668
 669     p_aout_buffer =
 670         p_dec->pf_aout_buffer_new( p_dec, i_samples );
 671     if( p_aout_buffer )
 672     {
 673         memcpy( p_aout_buffer->p_buffer, p_sys->p_out, p_sys->i_out );
 674
 675         /* Date management */
 676         p_aout_buffer->start_date = aout_DateGet( &p_sys->end_date );
 677         p_aout_buffer->end_date =
 678             aout_DateIncrement( &p_sys->end_date, i_samples );
 679     }
 680
 681     block_Release( p_block );
 682     *pp_block = 0;
 683     return p_aout_buffer;
 684 }