git.sesse.net Git - vlc/blob - modules/audio_output/directx.c

   1 /*****************************************************************************
   2  * directx.c: Windows DirectX audio output method
   3  *****************************************************************************
   4  * Copyright (C) 2001-2009 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Gildas Bazin <gbazin@videolan.org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software Foundation, Inc.,
  21  * 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27
  28 #ifdef HAVE_CONFIG_H
  29 # include "config.h"
  30 #endif
  31
  32 #include <vlc_common.h>
  33 #include <vlc_plugin.h>
  34 #include <vlc_aout.h>
  35 #include <vlc_charset.h>
  36
  37 #include "windows_audio_common.h"
  38
  39 #include <dsound.h>
  40
  41 #define FRAME_SIZE ((int)p_aout->output.output.i_rate/20) /* Size in samples */
  42
  43 /*****************************************************************************
  44  * notification_thread_t: DirectX event thread
  45  *****************************************************************************/
  46 typedef struct notification_thread_t
  47 {
  48     VLC_COMMON_MEMBERS
  49
  50     aout_instance_t *p_aout;
  51     int i_frame_size;                          /* size in bytes of one frame */
  52     int i_write_slot;       /* current write position in our circular buffer */
  53
  54     mtime_t start_date;
  55     HANDLE event;
  56
  57 } notification_thread_t;
  58
  59 /*****************************************************************************
  60  * aout_sys_t: directx audio output method descriptor
  61  *****************************************************************************
  62  * This structure is part of the audio output thread descriptor.
  63  * It describes the direct sound specific properties of an audio device.
  64  *****************************************************************************/
  65 struct aout_sys_t
  66 {
  67     HINSTANCE           hdsound_dll;      /* handle of the opened dsound dll */
  68
  69     char *              psz_device;              /* user defined device name */
  70     LPGUID              p_device_guid;
  71
  72     LPDIRECTSOUND       p_dsobject;              /* main Direct Sound object */
  73     LPDIRECTSOUNDBUFFER p_dsbuffer;   /* the sound buffer we use (direct sound
  74                                        * takes care of mixing all the
  75                                        * secondary buffers into the primary) */
  76
  77     notification_thread_t *p_notif;                  /* DirectSoundThread id */
  78
  79     int      b_playing;                                    /* playing status */
  80
  81     int      i_frame_size;                     /* Size in bytes of one frame */
  82
  83     int      i_speaker_setup;                      /* Speaker setup override */
  84
  85     bool     b_chan_reorder;                /* do we need channel reordering */
  86     int      pi_chan_table[AOUT_CHAN_MAX];
  87     uint32_t i_channel_mask;
  88     uint32_t i_bits_per_sample;
  89     uint32_t i_channels;
  90 };
  91
  92 /*****************************************************************************
  93  * Local prototypes.
  94  *****************************************************************************/
  95 static int  OpenAudio  ( vlc_object_t * );
  96 static void CloseAudio ( vlc_object_t * );
  97 static void Play       ( aout_instance_t * );
  98
  99 /* local functions */
 100 static void Probe             ( aout_instance_t * );
 101 static int  InitDirectSound   ( aout_instance_t * );
 102 static int  CreateDSBuffer    ( aout_instance_t *, int, int, int, int, int, bool );
 103 static int  CreateDSBufferPCM ( aout_instance_t *, vlc_fourcc_t*, int, int, int, bool );
 104 static void DestroyDSBuffer   ( aout_instance_t * );
 105 static void* DirectSoundThread( vlc_object_t * );
 106 static int  FillBuffer        ( aout_instance_t *, int, aout_buffer_t * );
 107
 108 static int ReloadDirectXDevices( vlc_object_t *, char const *,
 109                                 vlc_value_t, vlc_value_t, void * );
 110
 111 /* Speaker setup override options list */
 112 static const char *const speaker_list[] = { "Windows default", "Mono", "Stereo",
 113                                             "Quad", "5.1", "7.1" };
 114 static const char *const ppsz_adev[] = {"default",  };
 115 static const char *const ppsz_adev_text[] = {"default", };
 116
 117 /*****************************************************************************
 118  * Module descriptor
 119  *****************************************************************************/
 120 #define DEVICE_TEXT N_("Output device")
 121 #define DEVICE_LONGTEXT N_("Select your audio output device")
 122
 123 #define SPEAKER_TEXT N_("Speaker configuration")
 124 #define SPEAKER_LONGTEXT N_("Select speaker configuration you want to use. " \
 125     "This option doesn't upmix! So NO e.g. Stereo -> 5.1 conversion." )
 126
 127 vlc_module_begin ()
 128     set_description( N_("DirectX audio output") )
 129     set_shortname( "DirectX" )
 130     set_capability( "audio output", 100 )
 131     set_category( CAT_AUDIO )
 132     set_subcategory( SUBCAT_AUDIO_AOUT )
 133     add_shortcut( "directx" )
 134     add_shortcut( "directsound" )
 135
 136     add_string( "directx-audio-device-name", "default", NULL,
 137              DEVICE_TEXT, DEVICE_LONGTEXT, false )
 138         add_deprecated_alias( "directx-audio-device" ) /* Since 1.1.0 */
 139         change_string_list( ppsz_adev, ppsz_adev_text, ReloadDirectXDevices )
 140         change_action_add( ReloadDirectXDevices, N_("Refresh list") )
 141         change_need_restart ()
 142     add_bool( "directx-audio-float32", false, NULL, FLOAT_TEXT,
 143               FLOAT_LONGTEXT, true )
 144     add_string( "directx-audio-speaker", "Windows default", NULL,
 145                  SPEAKER_TEXT, SPEAKER_LONGTEXT, true )
 146         change_string_list( speaker_list, 0, 0 )
 147         change_need_restart ()
 148
 149     set_callbacks( OpenAudio, CloseAudio )
 150 vlc_module_end ()
 151
 152 /*****************************************************************************
 153  * OpenAudio: open the audio device
 154  *****************************************************************************
 155  * This function opens and setups Direct Sound.
 156  *****************************************************************************/
 157 static int OpenAudio( vlc_object_t *p_this )
 158 {
 159     aout_instance_t * p_aout = (aout_instance_t *)p_this;
 160     vlc_value_t val;
 161     char * psz_speaker;
 162     int i = 0;
 163
 164     const char * const * ppsz_compare = speaker_list;
 165
 166     msg_Dbg( p_aout, "Opening DirectSound Audio Output" );
 167
 168    /* Allocate structure */
 169     p_aout->output.p_sys = malloc( sizeof( aout_sys_t ) );
 170     if( p_aout->output.p_sys == NULL )
 171         return VLC_ENOMEM;
 172
 173     /* Initialize some variables */
 174     p_aout->output.p_sys->p_dsobject = NULL;
 175     p_aout->output.p_sys->p_dsbuffer = NULL;
 176     p_aout->output.p_sys->p_notif = NULL;
 177     p_aout->output.p_sys->b_playing = 0;
 178
 179     p_aout->output.pf_play = Play;
 180     aout_VolumeSoftInit( p_aout );
 181
 182     /* Retrieve config values */
 183     var_Create( p_aout, "directx-audio-float32",
 184                 VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 185     psz_speaker = var_CreateGetString( p_aout, "directx-audio-speaker" );
 186
 187     while ( *ppsz_compare != NULL )
 188     {
 189         if ( !strncmp( *ppsz_compare, psz_speaker, strlen(*ppsz_compare) ) )
 190         {
 191             break;
 192         }
 193         ppsz_compare++; i++;
 194     }
 195
 196     if ( *ppsz_compare == NULL )
 197     {
 198         msg_Err( p_aout, "(%s) isn't valid speaker setup option", psz_speaker );
 199         msg_Err( p_aout, "Defaulting to Windows default speaker config");
 200         i = 0;
 201     }
 202     free( psz_speaker );
 203     p_aout->output.p_sys->i_speaker_setup = i;
 204
 205     p_aout->output.p_sys->p_device_guid = 0;
 206
 207     /* Initialise DirectSound */
 208     if( InitDirectSound( p_aout ) )
 209     {
 210         msg_Err( p_aout, "cannot initialize DirectSound" );
 211         goto error;
 212     }
 213
 214     if( var_Type( p_aout, "audio-device" ) == 0 )
 215     {
 216         Probe( p_aout );
 217     }
 218
 219     if( var_Get( p_aout, "audio-device", &val ) < 0 )
 220     {
 221         /* Probe() has failed. */
 222         goto error;
 223     }
 224
 225     /* Open the device */
 226     if( val.i_int == AOUT_VAR_SPDIF )
 227     {
 228         p_aout->output.output.i_format = VLC_CODEC_SPDIFL;
 229
 230         /* Calculate the frame size in bytes */
 231         p_aout->output.i_nb_samples = A52_FRAME_NB;
 232         p_aout->output.output.i_bytes_per_frame = AOUT_SPDIF_SIZE;
 233         p_aout->output.output.i_frame_length = A52_FRAME_NB;
 234         p_aout->output.p_sys->i_frame_size =
 235             p_aout->output.output.i_bytes_per_frame;
 236
 237         if( CreateDSBuffer( p_aout, VLC_CODEC_SPDIFL,
 238                             p_aout->output.output.i_physical_channels,
 239                             aout_FormatNbChannels( &p_aout->output.output ),
 240                             p_aout->output.output.i_rate,
 241                             p_aout->output.p_sys->i_frame_size, false )
 242             != VLC_SUCCESS )
 243         {
 244             msg_Err( p_aout, "cannot open directx audio device" );
 245             free( p_aout->output.p_sys );
 246             return VLC_EGENERIC;
 247         }
 248
 249         aout_VolumeNoneInit( p_aout );
 250     }
 251     else
 252     {
 253         if( val.i_int == AOUT_VAR_5_1 )
 254         {
 255             p_aout->output.output.i_physical_channels
 256                 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
 257                    | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT
 258                    | AOUT_CHAN_LFE;
 259         }
 260         else if( val.i_int == AOUT_VAR_7_1 )
 261         {
 262                     p_aout->output.output.i_physical_channels
 263                         = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
 264                            | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT
 265                            | AOUT_CHAN_MIDDLELEFT | AOUT_CHAN_MIDDLERIGHT
 266                            | AOUT_CHAN_LFE;
 267         }
 268         else if( val.i_int == AOUT_VAR_3F2R )
 269         {
 270             p_aout->output.output.i_physical_channels
 271                 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
 272                    | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
 273         }
 274         else if( val.i_int == AOUT_VAR_2F2R )
 275         {
 276             p_aout->output.output.i_physical_channels
 277                 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT
 278                    | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
 279         }
 280         else if( val.i_int == AOUT_VAR_MONO )
 281         {
 282             p_aout->output.output.i_physical_channels = AOUT_CHAN_CENTER;
 283         }
 284         else
 285         {
 286             p_aout->output.output.i_physical_channels
 287                 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
 288         }
 289
 290         if( CreateDSBufferPCM( p_aout, &p_aout->output.output.i_format,
 291                                p_aout->output.output.i_physical_channels,
 292                                aout_FormatNbChannels( &p_aout->output.output ),
 293                                p_aout->output.output.i_rate, false )
 294             != VLC_SUCCESS )
 295         {
 296             msg_Err( p_aout, "cannot open directx audio device" );
 297             free( p_aout->output.p_sys );
 298             return VLC_EGENERIC;
 299         }
 300
 301         /* Calculate the frame size in bytes */
 302         p_aout->output.i_nb_samples = FRAME_SIZE;
 303         aout_FormatPrepare( &p_aout->output.output );
 304         aout_VolumeSoftInit( p_aout );
 305     }
 306
 307     /* Now we need to setup our DirectSound play notification structure */
 308     p_aout->output.p_sys->p_notif =
 309         vlc_object_create( p_aout, sizeof(notification_thread_t) );
 310     p_aout->output.p_sys->p_notif->p_aout = p_aout;
 311
 312     p_aout->output.p_sys->p_notif->event = CreateEvent( 0, FALSE, FALSE, 0 );
 313     p_aout->output.p_sys->p_notif->i_frame_size =
 314         p_aout->output.p_sys->i_frame_size;
 315
 316     /* then launch the notification thread */
 317     msg_Dbg( p_aout, "creating DirectSoundThread" );
 318     if( vlc_thread_create( p_aout->output.p_sys->p_notif,
 319                            "DirectSound Notification Thread",
 320                            DirectSoundThread,
 321                            VLC_THREAD_PRIORITY_HIGHEST ) )
 322     {
 323         msg_Err( p_aout, "cannot create DirectSoundThread" );
 324         CloseHandle( p_aout->output.p_sys->p_notif->event );
 325         vlc_object_release( p_aout->output.p_sys->p_notif );
 326         p_aout->output.p_sys->p_notif = NULL;
 327         goto error;
 328     }
 329
 330     vlc_object_attach( p_aout->output.p_sys->p_notif, p_aout );
 331
 332     return VLC_SUCCESS;
 333
 334  error:
 335     CloseAudio( VLC_OBJECT(p_aout) );
 336     return VLC_EGENERIC;
 337 }
 338
 339 /*****************************************************************************
 340  * Probe: probe the audio device for available formats and channels
 341  *****************************************************************************/
 342 static void Probe( aout_instance_t * p_aout )
 343 {
 344     vlc_value_t val, text;
 345     vlc_fourcc_t i_format;
 346     unsigned int i_physical_channels;
 347     DWORD ui_speaker_config;
 348     bool is_default_output_set = false;
 349
 350     var_Create( p_aout, "audio-device", VLC_VAR_INTEGER | VLC_VAR_HASCHOICE );
 351     text.psz_string = _("Audio Device");
 352     var_Change( p_aout, "audio-device", VLC_VAR_SETTEXT, &text, NULL );
 353
 354     /* Test for 5.1 support */
 355     i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
 356                           AOUT_CHAN_CENTER | AOUT_CHAN_REARLEFT |
 357                           AOUT_CHAN_REARRIGHT | AOUT_CHAN_LFE;
 358     if( p_aout->output.output.i_physical_channels == i_physical_channels )
 359     {
 360         if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 6,
 361                                p_aout->output.output.i_rate, true )
 362             == VLC_SUCCESS )
 363         {
 364             val.i_int = AOUT_VAR_5_1;
 365             text.psz_string = (char*) "5.1";
 366             var_Change( p_aout, "audio-device",
 367                         VLC_VAR_ADDCHOICE, &val, &text );
 368             var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
 369             is_default_output_set = true;
 370             msg_Dbg( p_aout, "device supports 5.1 channels" );
 371         }
 372     }
 373
 374     /* Test for 7.1 support */
 375     i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
 376                              AOUT_CHAN_CENTER | AOUT_CHAN_REARLEFT |
 377                              AOUT_CHAN_MIDDLELEFT | AOUT_CHAN_MIDDLERIGHT |
 378                              AOUT_CHAN_REARRIGHT | AOUT_CHAN_LFE;
 379     if( p_aout->output.output.i_physical_channels == i_physical_channels )
 380     {
 381         if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 8,
 382                                   p_aout->output.output.i_rate, true )
 383             == VLC_SUCCESS )
 384         {
 385             val.i_int = AOUT_VAR_7_1;
 386             text.psz_string = (char*) "7.1";
 387             var_Change( p_aout, "audio-device",
 388                         VLC_VAR_ADDCHOICE, &val, &text );
 389             var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
 390             is_default_output_set = true;
 391             msg_Dbg( p_aout, "device supports 7.1 channels" );
 392         }
 393     }
 394
 395     /* Test for 3 Front 2 Rear support */
 396     i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
 397                           AOUT_CHAN_CENTER | AOUT_CHAN_REARLEFT |
 398                           AOUT_CHAN_REARRIGHT;
 399     if( p_aout->output.output.i_physical_channels == i_physical_channels )
 400     {
 401         if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 5,
 402                                p_aout->output.output.i_rate, true )
 403             == VLC_SUCCESS )
 404         {
 405             val.i_int = AOUT_VAR_3F2R;
 406             text.psz_string = _("3 Front 2 Rear");
 407             var_Change( p_aout, "audio-device",
 408                         VLC_VAR_ADDCHOICE, &val, &text );
 409             if(!is_default_output_set)
 410             {
 411                 var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
 412                 is_default_output_set = true;
 413             }
 414             msg_Dbg( p_aout, "device supports 5 channels" );
 415         }
 416     }
 417
 418     /* Test for 2 Front 2 Rear support */
 419     i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
 420                           AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
 421     if( ( p_aout->output.output.i_physical_channels & i_physical_channels )
 422         == i_physical_channels )
 423     {
 424         if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 4,
 425                                p_aout->output.output.i_rate, true )
 426             == VLC_SUCCESS )
 427         {
 428             val.i_int = AOUT_VAR_2F2R;
 429             text.psz_string = _("2 Front 2 Rear");
 430             var_Change( p_aout, "audio-device",
 431                         VLC_VAR_ADDCHOICE, &val, &text );
 432             if(!is_default_output_set)
 433             {
 434                 var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
 435                 is_default_output_set = true;
 436             }
 437             msg_Dbg( p_aout, "device supports 4 channels" );
 438         }
 439     }
 440
 441     /* Test for stereo support */
 442     i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
 443     if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 2,
 444                            p_aout->output.output.i_rate, true )
 445         == VLC_SUCCESS )
 446     {
 447         val.i_int = AOUT_VAR_STEREO;
 448         text.psz_string = _("Stereo");
 449         var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
 450         if(!is_default_output_set)
 451         {
 452             var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
 453             is_default_output_set = true;
 454             msg_Dbg( p_aout, "device supports 2 channels (DEFAULT!)" );
 455         }
 456         else msg_Dbg( p_aout, "device supports 2 channels" );
 457     }
 458
 459     /* Test for mono support */
 460     i_physical_channels = AOUT_CHAN_CENTER;
 461     if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 1,
 462                            p_aout->output.output.i_rate, true )
 463         == VLC_SUCCESS )
 464     {
 465         val.i_int = AOUT_VAR_MONO;
 466         text.psz_string = _("Mono");
 467         var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
 468         msg_Dbg( p_aout, "device supports 1 channel" );
 469     }
 470
 471     /* Check the speaker configuration to determine which channel config should
 472      * be the default */
 473     if FAILED( IDirectSound_GetSpeakerConfig( p_aout->output.p_sys->p_dsobject,
 474                                               &ui_speaker_config ) )
 475     {
 476         ui_speaker_config = DSSPEAKER_STEREO;
 477         msg_Dbg( p_aout, "GetSpeakerConfig failed" );
 478     }
 479     switch( DSSPEAKER_CONFIG(ui_speaker_config) )
 480     {
 481     case DSSPEAKER_7POINT1:
 482         msg_Dbg( p_aout, "Windows says your SpeakerConfig is 7.1" );
 483         val.i_int = AOUT_VAR_7_1;
 484         break;
 485     case DSSPEAKER_5POINT1:
 486         msg_Dbg( p_aout, "Windows says your SpeakerConfig is 5.1" );
 487         val.i_int = AOUT_VAR_5_1;
 488         break;
 489     case DSSPEAKER_QUAD:
 490         msg_Dbg( p_aout, "Windows says your SpeakerConfig is Quad" );
 491         val.i_int = AOUT_VAR_2F2R;
 492         break;
 493 #if 0 /* Lots of people just get their settings wrong and complain that
 494        * this is a problem with VLC so just don't ever set mono by default. */
 495     case DSSPEAKER_MONO:
 496         val.i_int = AOUT_VAR_MONO;
 497         break;
 498 #endif
 499     case DSSPEAKER_SURROUND:
 500         msg_Dbg( p_aout, "Windows says your SpeakerConfig is surround" );
 501     case DSSPEAKER_STEREO:
 502         msg_Dbg( p_aout, "Windows says your SpeakerConfig is stereo" );
 503     default:
 504         /* If nothing else is found, choose stereo output */
 505         val.i_int = AOUT_VAR_STEREO;
 506         break;
 507     }
 508
 509     /* Check if we want to override speaker config */
 510     switch( p_aout->output.p_sys->i_speaker_setup )
 511     {
 512     case 0: /* Default value aka Windows default speaker setup */
 513         break;
 514     case 1: /* Mono */
 515         msg_Dbg( p_aout, "SpeakerConfig is forced to Mono" );
 516         val.i_int = AOUT_VAR_MONO;
 517         break;
 518     case 2: /* Stereo */
 519         msg_Dbg( p_aout, "SpeakerConfig is forced to Stereo" );
 520         val.i_int = AOUT_VAR_STEREO;
 521         break;
 522     case 3: /* Quad */
 523         msg_Dbg( p_aout, "SpeakerConfig is forced to Quad" );
 524         val.i_int = AOUT_VAR_2F2R;
 525         break;
 526     case 4: /* 5.1 */
 527         msg_Dbg( p_aout, "SpeakerConfig is forced to 5.1" );
 528         val.i_int = AOUT_VAR_5_1;
 529         break;
 530     case 5: /* 7.1 */
 531         msg_Dbg( p_aout, "SpeakerConfig is forced to 7.1" );
 532         val.i_int = AOUT_VAR_7_1;
 533         break;
 534     default:
 535         msg_Dbg( p_aout, "SpeakerConfig is forced to non-existing value" );
 536         break;
 537     }
 538
 539     var_Set( p_aout, "audio-device", val );
 540
 541     /* Test for SPDIF support */
 542     if ( AOUT_FMT_NON_LINEAR( &p_aout->output.output ) )
 543     {
 544         if( CreateDSBuffer( p_aout, VLC_CODEC_SPDIFL,
 545                             p_aout->output.output.i_physical_channels,
 546                             aout_FormatNbChannels( &p_aout->output.output ),
 547                             p_aout->output.output.i_rate,
 548                             AOUT_SPDIF_SIZE, true )
 549             == VLC_SUCCESS )
 550         {
 551             msg_Dbg( p_aout, "device supports A/52 over S/PDIF" );
 552             val.i_int = AOUT_VAR_SPDIF;
 553             text.psz_string = _("A/52 over S/PDIF");
 554             var_Change( p_aout, "audio-device",
 555                         VLC_VAR_ADDCHOICE, &val, &text );
 556             if( var_InheritInteger( p_aout, "spdif" ) )
 557                 var_Set( p_aout, "audio-device", val );
 558         }
 559     }
 560
 561     var_Change( p_aout, "audio-device", VLC_VAR_CHOICESCOUNT, &val, NULL );
 562     if( val.i_int <= 0 )
 563     {
 564         /* Probe() has failed. */
 565         var_Destroy( p_aout, "audio-device" );
 566         return;
 567     }
 568
 569     var_AddCallback( p_aout, "audio-device", aout_ChannelsRestart, NULL );
 570     var_SetBool( p_aout, "intf-change", true );
 571 }
 572
 573 /*****************************************************************************
 574  * Play: we'll start playing the directsound buffer here because at least here
 575  *       we know the first buffer has been put in the aout fifo and we also
 576  *       know its date.
 577  *****************************************************************************/
 578 static void Play( aout_instance_t *p_aout )
 579 {
 580     if( !p_aout->output.p_sys->b_playing )
 581     {
 582         aout_buffer_t *p_buffer;
 583
 584         p_aout->output.p_sys->b_playing = 1;
 585
 586         /* get the playing date of the first aout buffer */
 587         p_aout->output.p_sys->p_notif->start_date =
 588             aout_FifoFirstDate( p_aout, &p_aout->output.fifo );
 589
 590         /* fill in the first samples */
 591         for( int i = 0; i < FRAMES_NUM; i++ )
 592         {
 593             p_buffer = aout_FifoPop( p_aout, &p_aout->output.fifo );
 594             if( !p_buffer ) break;
 595             FillBuffer( p_aout, i, p_buffer );
 596         }
 597
 598         /* wake up the audio output thread */
 599         SetEvent( p_aout->output.p_sys->p_notif->event );
 600     }
 601 }
 602
 603 /*****************************************************************************
 604  * CloseAudio: close the audio device
 605  *****************************************************************************/
 606 static void CloseAudio( vlc_object_t *p_this )
 607 {
 608     aout_instance_t * p_aout = (aout_instance_t *)p_this;
 609     aout_sys_t *p_sys = p_aout->output.p_sys;
 610
 611     msg_Dbg( p_aout, "closing audio device" );
 612
 613     /* kill the position notification thread, if any */
 614     if( p_sys->p_notif )
 615     {
 616         vlc_object_detach( p_sys->p_notif );
 617         vlc_object_kill( p_sys->p_notif );
 618         /* wake up the audio thread if needed */
 619         if( !p_sys->b_playing ) SetEvent( p_sys->p_notif->event );
 620
 621         vlc_thread_join( p_sys->p_notif );
 622         vlc_object_release( p_sys->p_notif );
 623     }
 624
 625     /* release the secondary buffer */
 626     DestroyDSBuffer( p_aout );
 627
 628     /* finally release the DirectSound object */
 629     if( p_sys->p_dsobject ) IDirectSound_Release( p_sys->p_dsobject );
 630
 631     /* free DSOUND.DLL */
 632     if( p_sys->hdsound_dll ) FreeLibrary( p_sys->hdsound_dll );
 633
 634     free( p_aout->output.p_sys->p_device_guid );
 635     free( p_sys );
 636 }
 637
 638 /*****************************************************************************
 639  * CallBackDirectSoundEnum: callback to enumerate available devices
 640  *****************************************************************************/
 641 static int CALLBACK CallBackDirectSoundEnum( LPGUID p_guid, LPCWSTR psz_desc,
 642                                              LPCWSTR psz_mod, LPVOID _p_aout )
 643 {
 644     VLC_UNUSED( psz_mod );
 645
 646     aout_instance_t *p_aout = (aout_instance_t *)_p_aout;
 647
 648     char *psz_device = FromWide( psz_desc );
 649     msg_Dbg( p_aout, "found device: %s", psz_device );
 650
 651     if( p_aout->output.p_sys->psz_device &&
 652         !strcmp(p_aout->output.p_sys->psz_device, psz_device) && p_guid )
 653     {
 654         /* Use the device corresponding to psz_device */
 655         p_aout->output.p_sys->p_device_guid = malloc( sizeof( GUID ) );
 656         *p_aout->output.p_sys->p_device_guid = *p_guid;
 657         msg_Dbg( p_aout, "using device: %s", psz_device );
 658     }
 659     else
 660     {
 661         /* If no default device has been selected, chose the first one */
 662         if( !p_aout->output.p_sys->psz_device && p_guid )
 663         {
 664             p_aout->output.p_sys->psz_device = strdup( psz_device );
 665             p_aout->output.p_sys->p_device_guid = malloc( sizeof( GUID ) );
 666             *p_aout->output.p_sys->p_device_guid = *p_guid;
 667             msg_Dbg( p_aout, "using device: %s", psz_device );
 668         }
 669     }
 670
 671     free( psz_device );
 672     return true;
 673 }
 674
 675 /*****************************************************************************
 676  * InitDirectSound: handle all the gory details of DirectSound initialisation
 677  *****************************************************************************/
 678 static int InitDirectSound( aout_instance_t *p_aout )
 679 {
 680     HRESULT (WINAPI *OurDirectSoundCreate)(LPGUID, LPDIRECTSOUND *, LPUNKNOWN);
 681     HRESULT (WINAPI *OurDirectSoundEnumerate)(LPDSENUMCALLBACKW, LPVOID);
 682
 683     p_aout->output.p_sys->hdsound_dll = LoadLibrary("DSOUND.DLL");
 684     if( p_aout->output.p_sys->hdsound_dll == NULL )
 685     {
 686         msg_Warn( p_aout, "cannot open DSOUND.DLL" );
 687         goto error;
 688     }
 689
 690     OurDirectSoundCreate = (void *)
 691         GetProcAddress( p_aout->output.p_sys->hdsound_dll,
 692                         "DirectSoundCreate" );
 693     if( OurDirectSoundCreate == NULL )
 694     {
 695         msg_Warn( p_aout, "GetProcAddress FAILED" );
 696         goto error;
 697     }
 698
 699     /* Get DirectSoundEnumerate */
 700     OurDirectSoundEnumerate = (void *)
 701        GetProcAddress( p_aout->output.p_sys->hdsound_dll,
 702                        "DirectSoundEnumerateW" );
 703     if( OurDirectSoundEnumerate )
 704     {
 705         p_aout->output.p_sys->psz_device = var_InheritString(p_aout, "directx-audio-device-name");
 706         /* Attempt enumeration */
 707         if( FAILED( OurDirectSoundEnumerate( CallBackDirectSoundEnum,
 708                                              p_aout ) ) )
 709         {
 710             msg_Dbg( p_aout, "enumeration of DirectSound devices failed" );
 711         }
 712     }
 713
 714     /* Create the direct sound object */
 715     if FAILED( OurDirectSoundCreate( p_aout->output.p_sys->p_device_guid,
 716                                      &p_aout->output.p_sys->p_dsobject,
 717                                      NULL ) )
 718     {
 719         msg_Warn( p_aout, "cannot create a direct sound device" );
 720         goto error;
 721     }
 722
 723     /* Set DirectSound Cooperative level, ie what control we want over Windows
 724      * sound device. In our case, DSSCL_EXCLUSIVE means that we can modify the
 725      * settings of the primary buffer, but also that only the sound of our
 726      * application will be hearable when it will have the focus.
 727      * !!! (this is not really working as intended yet because to set the
 728      * cooperative level you need the window handle of your application, and
 729      * I don't know of any easy way to get it. Especially since we might play
 730      * sound without any video, and so what window handle should we use ???
 731      * The hack for now is to use the Desktop window handle - it seems to be
 732      * working */
 733     if( IDirectSound_SetCooperativeLevel( p_aout->output.p_sys->p_dsobject,
 734                                           GetDesktopWindow(),
 735                                           DSSCL_EXCLUSIVE) )
 736     {
 737         msg_Warn( p_aout, "cannot set direct sound cooperative level" );
 738     }
 739
 740     return VLC_SUCCESS;
 741
 742  error:
 743     p_aout->output.p_sys->p_dsobject = NULL;
 744     if( p_aout->output.p_sys->hdsound_dll )
 745     {
 746         FreeLibrary( p_aout->output.p_sys->hdsound_dll );
 747         p_aout->output.p_sys->hdsound_dll = NULL;
 748     }
 749     return VLC_EGENERIC;
 750
 751 }
 752
 753 /*****************************************************************************
 754  * CreateDSBuffer: Creates a direct sound buffer of the required format.
 755  *****************************************************************************
 756  * This function creates the buffer we'll use to play audio.
 757  * In DirectSound there are two kinds of buffers:
 758  * - the primary buffer: which is the actual buffer that the soundcard plays
 759  * - the secondary buffer(s): these buffers are the one actually used by
 760  *    applications and DirectSound takes care of mixing them into the primary.
 761  *
 762  * Once you create a secondary buffer, you cannot change its format anymore so
 763  * you have to release the current one and create another.
 764  *****************************************************************************/
 765 static int CreateDSBuffer( aout_instance_t *p_aout, int i_format,
 766                            int i_channels, int i_nb_channels, int i_rate,
 767                            int i_bytes_per_frame, bool b_probe )
 768 {
 769     WAVEFORMATEXTENSIBLE waveformat;
 770     DSBUFFERDESC         dsbdesc;
 771     unsigned int         i;
 772
 773     /* First set the sound buffer format */
 774     waveformat.dwChannelMask = 0;
 775     for( i = 0; i < sizeof(pi_channels_src)/sizeof(uint32_t); i++ )
 776     {
 777         if( i_channels & pi_channels_src[i] )
 778             waveformat.dwChannelMask |= pi_channels_in[i];
 779     }
 780
 781     switch( i_format )
 782     {
 783     case VLC_CODEC_SPDIFL:
 784         i_nb_channels = 2;
 785         /* To prevent channel re-ordering */
 786         waveformat.dwChannelMask = SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT;
 787         waveformat.Format.wBitsPerSample = 16;
 788         waveformat.Samples.wValidBitsPerSample =
 789             waveformat.Format.wBitsPerSample;
 790         waveformat.Format.wFormatTag = WAVE_FORMAT_DOLBY_AC3_SPDIF;
 791         waveformat.SubFormat = _KSDATAFORMAT_SUBTYPE_DOLBY_AC3_SPDIF;
 792         break;
 793
 794     case VLC_CODEC_FL32:
 795         waveformat.Format.wBitsPerSample = sizeof(float) * 8;
 796         waveformat.Samples.wValidBitsPerSample =
 797             waveformat.Format.wBitsPerSample;
 798         waveformat.Format.wFormatTag = WAVE_FORMAT_IEEE_FLOAT;
 799         waveformat.SubFormat = _KSDATAFORMAT_SUBTYPE_IEEE_FLOAT;
 800         break;
 801
 802     case VLC_CODEC_S16L:
 803         waveformat.Format.wBitsPerSample = 16;
 804         waveformat.Samples.wValidBitsPerSample =
 805             waveformat.Format.wBitsPerSample;
 806         waveformat.Format.wFormatTag = WAVE_FORMAT_PCM;
 807         waveformat.SubFormat = _KSDATAFORMAT_SUBTYPE_PCM;
 808         break;
 809     }
 810
 811     waveformat.Format.nChannels = i_nb_channels;
 812     waveformat.Format.nSamplesPerSec = i_rate;
 813     waveformat.Format.nBlockAlign =
 814         waveformat.Format.wBitsPerSample / 8 * i_nb_channels;
 815     waveformat.Format.nAvgBytesPerSec =
 816         waveformat.Format.nSamplesPerSec * waveformat.Format.nBlockAlign;
 817
 818     p_aout->output.p_sys->i_bits_per_sample = waveformat.Format.wBitsPerSample;
 819     p_aout->output.p_sys->i_channels = i_nb_channels;
 820
 821     /* Then fill in the direct sound descriptor */
 822     memset(&dsbdesc, 0, sizeof(DSBUFFERDESC));
 823     dsbdesc.dwSize = sizeof(DSBUFFERDESC);
 824     dsbdesc.dwFlags = DSBCAPS_GETCURRENTPOSITION2/* Better position accuracy */
 825                     | DSBCAPS_GLOBALFOCUS;      /* Allows background playing */
 826
 827     /* Only use the new WAVE_FORMAT_EXTENSIBLE format for multichannel audio */
 828     if( i_nb_channels <= 2 )
 829     {
 830         waveformat.Format.cbSize = 0;
 831     }
 832     else
 833     {
 834         waveformat.Format.wFormatTag = WAVE_FORMAT_EXTENSIBLE;
 835         waveformat.Format.cbSize =
 836             sizeof(WAVEFORMATEXTENSIBLE) - sizeof(WAVEFORMATEX);
 837
 838         /* Needed for 5.1 on emu101k */
 839         dsbdesc.dwFlags |= DSBCAPS_LOCHARDWARE;
 840     }
 841
 842     dsbdesc.dwBufferBytes = FRAMES_NUM * i_bytes_per_frame;   /* buffer size */
 843     dsbdesc.lpwfxFormat = (WAVEFORMATEX *)&waveformat;
 844
 845     if FAILED( IDirectSound_CreateSoundBuffer(
 846                    p_aout->output.p_sys->p_dsobject, &dsbdesc,
 847                    &p_aout->output.p_sys->p_dsbuffer, NULL) )
 848     {
 849         if( dsbdesc.dwFlags & DSBCAPS_LOCHARDWARE )
 850         {
 851             /* Try without DSBCAPS_LOCHARDWARE */
 852             dsbdesc.dwFlags &= ~DSBCAPS_LOCHARDWARE;
 853             if FAILED( IDirectSound_CreateSoundBuffer(
 854                    p_aout->output.p_sys->p_dsobject, &dsbdesc,
 855                    &p_aout->output.p_sys->p_dsbuffer, NULL) )
 856             {
 857                 return VLC_EGENERIC;
 858             }
 859             if( !b_probe )
 860                 msg_Dbg( p_aout, "couldn't use hardware sound buffer" );
 861         }
 862         else
 863         {
 864             return VLC_EGENERIC;
 865         }
 866     }
 867
 868     /* Stop here if we were just probing */
 869     if( b_probe )
 870     {
 871         IDirectSoundBuffer_Release( p_aout->output.p_sys->p_dsbuffer );
 872         p_aout->output.p_sys->p_dsbuffer = NULL;
 873         return VLC_SUCCESS;
 874     }
 875
 876     p_aout->output.p_sys->i_frame_size = i_bytes_per_frame;
 877     p_aout->output.p_sys->i_channel_mask = waveformat.dwChannelMask;
 878     p_aout->output.p_sys->b_chan_reorder =
 879         aout_CheckChannelReorder( pi_channels_in, pi_channels_out,
 880                                   waveformat.dwChannelMask, i_nb_channels,
 881                                   p_aout->output.p_sys->pi_chan_table );
 882
 883     if( p_aout->output.p_sys->b_chan_reorder )
 884     {
 885         msg_Dbg( p_aout, "channel reordering needed" );
 886     }
 887
 888     return VLC_SUCCESS;
 889 }
 890
 891 /*****************************************************************************
 892  * CreateDSBufferPCM: creates a PCM direct sound buffer.
 893  *****************************************************************************
 894  * We first try to create a WAVE_FORMAT_IEEE_FLOAT buffer if supported by
 895  * the hardware, otherwise we create a WAVE_FORMAT_PCM buffer.
 896  ****************************************************************************/
 897 static int CreateDSBufferPCM( aout_instance_t *p_aout, vlc_fourcc_t *i_format,
 898                               int i_channels, int i_nb_channels, int i_rate,
 899                               bool b_probe )
 900 {
 901     /* Float32 audio samples are not supported for 5.1 output on the emu101k */
 902     if( !var_GetBool( p_aout, "directx-audio-float32" ) ||
 903         i_nb_channels > 2 ||
 904         CreateDSBuffer( p_aout, VLC_CODEC_FL32,
 905                         i_channels, i_nb_channels, i_rate,
 906                         FRAME_SIZE * 4 * i_nb_channels, b_probe )
 907         != VLC_SUCCESS )
 908     {
 909         if ( CreateDSBuffer( p_aout, VLC_CODEC_S16L,
 910                              i_channels, i_nb_channels, i_rate,
 911                              FRAME_SIZE * 2 * i_nb_channels, b_probe )
 912              != VLC_SUCCESS )
 913         {
 914             return VLC_EGENERIC;
 915         }
 916         else
 917         {
 918             *i_format = VLC_CODEC_S16L;
 919             return VLC_SUCCESS;
 920         }
 921     }
 922     else
 923     {
 924         *i_format = VLC_CODEC_FL32;
 925         return VLC_SUCCESS;
 926     }
 927 }
 928
 929 /*****************************************************************************
 930  * DestroyDSBuffer
 931  *****************************************************************************
 932  * This function destroys the secondary buffer.
 933  *****************************************************************************/
 934 static void DestroyDSBuffer( aout_instance_t *p_aout )
 935 {
 936     if( p_aout->output.p_sys->p_dsbuffer )
 937     {
 938         IDirectSoundBuffer_Release( p_aout->output.p_sys->p_dsbuffer );
 939         p_aout->output.p_sys->p_dsbuffer = NULL;
 940     }
 941 }
 942
 943 /*****************************************************************************
 944  * FillBuffer: Fill in one of the direct sound frame buffers.
 945  *****************************************************************************
 946  * Returns VLC_SUCCESS on success.
 947  *****************************************************************************/
 948 static int FillBuffer( aout_instance_t *p_aout, int i_frame,
 949                        aout_buffer_t *p_buffer )
 950 {
 951     notification_thread_t *p_notif = p_aout->output.p_sys->p_notif;
 952     aout_sys_t *p_sys = p_aout->output.p_sys;
 953     void *p_write_position, *p_wrap_around;
 954     unsigned long l_bytes1, l_bytes2;
 955     HRESULT dsresult;
 956
 957     /* Before copying anything, we have to lock the buffer */
 958     dsresult = IDirectSoundBuffer_Lock(
 959                 p_sys->p_dsbuffer,                              /* DS buffer */
 960                 i_frame * p_notif->i_frame_size,             /* Start offset */
 961                 p_notif->i_frame_size,                    /* Number of bytes */
 962                 &p_write_position,                  /* Address of lock start */
 963                 &l_bytes1,       /* Count of bytes locked before wrap around */
 964                 &p_wrap_around,            /* Buffer adress (if wrap around) */
 965                 &l_bytes2,               /* Count of bytes after wrap around */
 966                 0 );                                                /* Flags */
 967     if( dsresult == DSERR_BUFFERLOST )
 968     {
 969         IDirectSoundBuffer_Restore( p_sys->p_dsbuffer );
 970         dsresult = IDirectSoundBuffer_Lock(
 971                                p_sys->p_dsbuffer,
 972                                i_frame * p_notif->i_frame_size,
 973                                p_notif->i_frame_size,
 974                                &p_write_position,
 975                                &l_bytes1,
 976                                &p_wrap_around,
 977                                &l_bytes2,
 978                                0 );
 979     }
 980     if( dsresult != DS_OK )
 981     {
 982         msg_Warn( p_notif, "cannot lock buffer" );
 983         if( p_buffer ) aout_BufferFree( p_buffer );
 984         return VLC_EGENERIC;
 985     }
 986
 987     if( p_buffer == NULL )
 988     {
 989         memset( p_write_position, 0, l_bytes1 );
 990     }
 991     else
 992     {
 993         if( p_sys->b_chan_reorder )
 994         {
 995             /* Do the channel reordering here */
 996             aout_ChannelReorder( p_buffer->p_buffer, p_buffer->i_buffer,
 997                                  p_sys->i_channels, p_sys->pi_chan_table,
 998                                  p_sys->i_bits_per_sample );
 999         }
1000
1001         vlc_memcpy( p_write_position, p_buffer->p_buffer, l_bytes1 );
1002         aout_BufferFree( p_buffer );
1003     }
1004
1005     /* Now the data has been copied, unlock the buffer */
1006     IDirectSoundBuffer_Unlock( p_sys->p_dsbuffer, p_write_position, l_bytes1,
1007                                p_wrap_around, l_bytes2 );
1008
1009     p_notif->i_write_slot = (i_frame + 1) % FRAMES_NUM;
1010     return VLC_SUCCESS;
1011 }
1012
1013 /*****************************************************************************
1014  * DirectSoundThread: this thread will capture play notification events.
1015  *****************************************************************************
1016  * We use this thread to emulate a callback mechanism. The thread probes for
1017  * event notification and fills up the DS secondary buffer when needed.
1018  *****************************************************************************/
1019 static void* DirectSoundThread( vlc_object_t *p_this )
1020 {
1021     notification_thread_t *p_notif = (notification_thread_t*)p_this;
1022     aout_instance_t *p_aout = p_notif->p_aout;
1023     mtime_t last_time;
1024     int canc = vlc_savecancel ();
1025
1026     /* We don't want any resampling when using S/PDIF output */
1027     bool b_sleek = (p_aout->output.output.i_format == VLC_CODEC_SPDIFL);
1028
1029     msg_Dbg( p_notif, "DirectSoundThread ready" );
1030
1031     /* Wait here until Play() is called */
1032     WaitForSingleObject( p_notif->event, INFINITE );
1033
1034     if( vlc_object_alive (p_notif) )
1035     {
1036         HRESULT dsresult;
1037         mwait( p_notif->start_date - AOUT_PTS_TOLERANCE / 2 );
1038
1039         /* start playing the buffer */
1040         dsresult = IDirectSoundBuffer_Play( p_aout->output.p_sys->p_dsbuffer,
1041                                         0,                         /* Unused */
1042                                         0,                         /* Unused */
1043                                         DSBPLAY_LOOPING );          /* Flags */
1044         if( dsresult == DSERR_BUFFERLOST )
1045         {
1046             IDirectSoundBuffer_Restore( p_aout->output.p_sys->p_dsbuffer );
1047             dsresult = IDirectSoundBuffer_Play(
1048                                             p_aout->output.p_sys->p_dsbuffer,
1049                                             0,                     /* Unused */
1050                                             0,                     /* Unused */
1051                                             DSBPLAY_LOOPING );      /* Flags */
1052         }
1053         if( dsresult != DS_OK )
1054         {
1055             msg_Err( p_aout, "cannot start playing buffer" );
1056         }
1057     }
1058     last_time = mdate();
1059
1060     while( vlc_object_alive (p_notif) )
1061     {
1062         DWORD l_read;
1063         int l_queued = 0, l_free_slots;
1064         unsigned i_frame_siz = p_aout->output.i_nb_samples;
1065         mtime_t mtime = mdate();
1066         int i;
1067
1068         /*
1069          * Fill in as much audio data as we can in our circular buffer
1070          */
1071
1072         /* Find out current play position */
1073         if FAILED( IDirectSoundBuffer_GetCurrentPosition(
1074                    p_aout->output.p_sys->p_dsbuffer, &l_read, NULL ) )
1075         {
1076             msg_Err( p_aout, "GetCurrentPosition() failed!" );
1077             l_read = 0;
1078         }
1079
1080         /* Detect underruns */
1081         if( l_queued && mtime - last_time >
1082             INT64_C(1000000) * l_queued / p_aout->output.output.i_rate )
1083         {
1084             msg_Dbg( p_aout, "detected underrun!" );
1085         }
1086         last_time = mtime;
1087
1088         /* Try to fill in as many frame buffers as possible */
1089         l_read /= (p_aout->output.output.i_bytes_per_frame /
1090             p_aout->output.output.i_frame_length);
1091         l_queued = p_notif->i_write_slot * i_frame_siz - l_read;
1092         if( l_queued < 0 ) l_queued += (i_frame_siz * FRAMES_NUM);
1093         l_free_slots = (FRAMES_NUM * i_frame_siz - l_queued) / i_frame_siz;
1094
1095         for( i = 0; i < l_free_slots; i++ )
1096         {
1097             aout_buffer_t *p_buffer = aout_OutputNextBuffer( p_aout,
1098                 mtime + INT64_C(1000000) * (i * i_frame_siz + l_queued) /
1099                 p_aout->output.output.i_rate, b_sleek );
1100
1101             /* If there is no audio data available and we have some buffered
1102              * already, then just wait for the next time */
1103             if( !p_buffer && (i || l_queued / i_frame_siz) ) break;
1104
1105             if( FillBuffer( p_aout, p_notif->i_write_slot % FRAMES_NUM,
1106                             p_buffer ) != VLC_SUCCESS ) break;
1107         }
1108
1109         /* Sleep a reasonable amount of time */
1110         l_queued += (i * i_frame_siz);
1111         msleep( INT64_C(1000000) * l_queued / p_aout->output.output.i_rate / 2 );
1112     }
1113
1114     /* make sure the buffer isn't playing */
1115     IDirectSoundBuffer_Stop( p_aout->output.p_sys->p_dsbuffer );
1116
1117     /* free the event */
1118     CloseHandle( p_notif->event );
1119
1120     vlc_restorecancel (canc);
1121     msg_Dbg( p_notif, "DirectSoundThread exiting" );
1122     return NULL;
1123 }
1124
1125 /*****************************************************************************
1126  * CallBackConfigNBEnum: callback to get the number of available devices
1127  *****************************************************************************/
1128 static int CALLBACK CallBackConfigNBEnum( LPGUID p_guid, LPCWSTR psz_desc,
1129                                              LPCWSTR psz_mod, LPVOID p_nb )
1130 {
1131     VLC_UNUSED( psz_mod ); VLC_UNUSED( psz_desc ); VLC_UNUSED( p_guid );
1132
1133     int * a = (int *)p_nb;
1134     (*a)++;
1135     return true;
1136 }
1137
1138 /*****************************************************************************
1139  * CallBackConfigEnum: callback to add available devices to the preferences list
1140  *****************************************************************************/
1141 static int CALLBACK CallBackConfigEnum( LPGUID p_guid, LPCWSTR psz_desc,
1142                                              LPCWSTR psz_mod, LPVOID _p_item )
1143 {
1144     VLC_UNUSED( psz_mod ); VLC_UNUSED( p_guid );
1145
1146     module_config_t *p_item = (module_config_t *) _p_item;
1147
1148     p_item->ppsz_list[p_item->i_list] = FromWide( psz_desc );
1149     p_item->ppsz_list_text[p_item->i_list] = FromWide( psz_desc );
1150     p_item->i_list++;
1151     return true;
1152 }
1153
1154 /*****************************************************************************
1155  * ReloadDirectXDevices: store the list of devices in preferences
1156  *****************************************************************************/
1157 static int ReloadDirectXDevices( vlc_object_t *p_this, char const *psz_name,
1158                                  vlc_value_t newval, vlc_value_t oldval, void *data )
1159 {
1160     VLC_UNUSED( newval ); VLC_UNUSED( oldval ); VLC_UNUSED( data );
1161
1162     module_config_t *p_item = config_FindConfig( p_this, psz_name );
1163     if( !p_item ) return VLC_SUCCESS;
1164
1165     /* Clear-up the current list */
1166     if( p_item->i_list )
1167     {
1168         for( int i = 0; i < p_item->i_list; i++ )
1169         {
1170             free((char *)(p_item->ppsz_list[i]) );
1171             free((char *)(p_item->ppsz_list_text[i]) );
1172         }
1173     }
1174
1175     HRESULT (WINAPI *OurDirectSoundEnumerate)(LPDSENUMCALLBACKW, LPVOID);
1176
1177     HANDLE hdsound_dll = LoadLibrary("DSOUND.DLL");
1178     if( hdsound_dll == NULL )
1179     {
1180         msg_Warn( p_this, "cannot open DSOUND.DLL" );
1181         return VLC_SUCCESS;
1182     }
1183
1184     /* Get DirectSoundEnumerate */
1185     OurDirectSoundEnumerate = (void *)
1186                     GetProcAddress( hdsound_dll, "DirectSoundEnumerateW" );
1187
1188     if( OurDirectSoundEnumerate == NULL )
1189         goto error;
1190
1191     int nb_devices = 0;
1192     OurDirectSoundEnumerate(CallBackConfigNBEnum, &nb_devices);
1193     msg_Dbg(p_this,"found %d devices", nb_devices);
1194
1195     p_item->ppsz_list = xrealloc( p_item->ppsz_list,
1196                                   nb_devices * sizeof(char *) );
1197     p_item->ppsz_list_text = xrealloc( p_item->ppsz_list_text,
1198                                   nb_devices * sizeof(char *) );
1199
1200     p_item->i_list = 0;
1201     OurDirectSoundEnumerate(CallBackConfigEnum, p_item);
1202
1203     /* Signal change to the interface */
1204     p_item->b_dirty = true;
1205
1206 error:
1207     FreeLibrary(hdsound_dll);
1208
1209     return VLC_SUCCESS;
1210 }
1211