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
  21  * Foundation, Inc., 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( config_GetInt( 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         int i;
 584
 585         p_aout->output.p_sys->b_playing = 1;
 586
 587         /* get the playing date of the first aout buffer */
 588         p_aout->output.p_sys->p_notif->start_date =
 589             aout_FifoFirstDate( p_aout, &p_aout->output.fifo );
 590
 591         /* fill in the first samples */
 592         for( i = 0; i < FRAMES_NUM; i++ )
 593         {
 594             p_buffer = aout_FifoPop( p_aout, &p_aout->output.fifo );
 595             if( !p_buffer ) break;
 596             FillBuffer( p_aout, i, p_buffer );
 597         }
 598
 599         /* wake up the audio output thread */
 600         SetEvent( p_aout->output.p_sys->p_notif->event );
 601     }
 602 }
 603
 604 /*****************************************************************************
 605  * CloseAudio: close the audio device
 606  *****************************************************************************/
 607 static void CloseAudio( vlc_object_t *p_this )
 608 {
 609     aout_instance_t * p_aout = (aout_instance_t *)p_this;
 610     aout_sys_t *p_sys = p_aout->output.p_sys;
 611
 612     msg_Dbg( p_aout, "closing audio device" );
 613
 614     /* kill the position notification thread, if any */
 615     if( p_sys->p_notif )
 616     {
 617         vlc_object_detach( p_sys->p_notif );
 618         vlc_object_kill( p_sys->p_notif );
 619         /* wake up the audio thread if needed */
 620         if( !p_sys->b_playing ) SetEvent( p_sys->p_notif->event );
 621
 622         vlc_thread_join( p_sys->p_notif );
 623         vlc_object_release( p_sys->p_notif );
 624     }
 625
 626     /* release the secondary buffer */
 627     DestroyDSBuffer( p_aout );
 628
 629     /* finally release the DirectSound object */
 630     if( p_sys->p_dsobject ) IDirectSound_Release( p_sys->p_dsobject );
 631
 632     /* free DSOUND.DLL */
 633     if( p_sys->hdsound_dll ) FreeLibrary( p_sys->hdsound_dll );
 634
 635     free( p_aout->output.p_sys->p_device_guid );
 636     free( p_sys );
 637 }
 638
 639 /*****************************************************************************
 640  * CallBackDirectSoundEnum: callback to enumerate available devices
 641  *****************************************************************************/
 642 static int CALLBACK CallBackDirectSoundEnum( LPGUID p_guid, LPCSTR psz_desc,
 643                                              LPCSTR psz_mod, LPVOID _p_aout )
 644 {
 645     VLC_UNUSED( psz_mod );
 646
 647     aout_instance_t *p_aout = (aout_instance_t *)_p_aout;
 648
 649     msg_Dbg( p_aout, "found device: %s", psz_desc );
 650
 651     if( p_aout->output.p_sys->psz_device && !strcmp(p_aout->output.p_sys->psz_device, psz_desc) && p_guid )
 652     {
 653         /* Use the device corresponding to psz_device */
 654         p_aout->output.p_sys->p_device_guid = malloc( sizeof( GUID ) );
 655         *p_aout->output.p_sys->p_device_guid = *p_guid;
 656         msg_Dbg( p_aout, "using device: %s", psz_desc );
 657     }
 658     else
 659     {
 660         /* If no default device has been selected, chose the first one */
 661         if( !p_aout->output.p_sys->psz_device && p_guid )
 662         {
 663             p_aout->output.p_sys->psz_device = strdup( psz_desc );
 664             p_aout->output.p_sys->p_device_guid = malloc( sizeof( GUID ) );
 665             *p_aout->output.p_sys->p_device_guid = *p_guid;
 666             msg_Dbg( p_aout, "using device: %s", psz_desc );
 667         }
 668     }
 669     return 1;
 670 }
 671
 672 /*****************************************************************************
 673  * InitDirectSound: handle all the gory details of DirectSound initialisation
 674  *****************************************************************************/
 675 static int InitDirectSound( aout_instance_t *p_aout )
 676 {
 677     HRESULT (WINAPI *OurDirectSoundCreate)(LPGUID, LPDIRECTSOUND *, LPUNKNOWN);
 678     HRESULT (WINAPI *OurDirectSoundEnumerate)(LPDSENUMCALLBACK, LPVOID);
 679
 680     p_aout->output.p_sys->hdsound_dll = LoadLibrary("DSOUND.DLL");
 681     if( p_aout->output.p_sys->hdsound_dll == NULL )
 682     {
 683         msg_Warn( p_aout, "cannot open DSOUND.DLL" );
 684         goto error;
 685     }
 686
 687     OurDirectSoundCreate = (void *)
 688         GetProcAddress( p_aout->output.p_sys->hdsound_dll,
 689                         "DirectSoundCreate" );
 690     if( OurDirectSoundCreate == NULL )
 691     {
 692         msg_Warn( p_aout, "GetProcAddress FAILED" );
 693         goto error;
 694     }
 695
 696     /* Get DirectSoundEnumerate */
 697     OurDirectSoundEnumerate = (void *)
 698        GetProcAddress( p_aout->output.p_sys->hdsound_dll,
 699                        "DirectSoundEnumerateW" );
 700     if( OurDirectSoundEnumerate )
 701     {
 702         p_aout->output.p_sys->psz_device = config_GetPsz(p_aout, "directx-audio-device-name");
 703         /* Attempt enumeration */
 704         if( FAILED( OurDirectSoundEnumerate( CallBackDirectSoundEnum,
 705                                              p_aout ) ) )
 706         {
 707             msg_Dbg( p_aout, "enumeration of DirectSound devices failed" );
 708         }
 709     }
 710
 711     /* Create the direct sound object */
 712     if FAILED( OurDirectSoundCreate( p_aout->output.p_sys->p_device_guid,
 713                                      &p_aout->output.p_sys->p_dsobject,
 714                                      NULL ) )
 715     {
 716         msg_Warn( p_aout, "cannot create a direct sound device" );
 717         goto error;
 718     }
 719
 720     /* Set DirectSound Cooperative level, ie what control we want over Windows
 721      * sound device. In our case, DSSCL_EXCLUSIVE means that we can modify the
 722      * settings of the primary buffer, but also that only the sound of our
 723      * application will be hearable when it will have the focus.
 724      * !!! (this is not really working as intended yet because to set the
 725      * cooperative level you need the window handle of your application, and
 726      * I don't know of any easy way to get it. Especially since we might play
 727      * sound without any video, and so what window handle should we use ???
 728      * The hack for now is to use the Desktop window handle - it seems to be
 729      * working */
 730     if( IDirectSound_SetCooperativeLevel( p_aout->output.p_sys->p_dsobject,
 731                                           GetDesktopWindow(),
 732                                           DSSCL_EXCLUSIVE) )
 733     {
 734         msg_Warn( p_aout, "cannot set direct sound cooperative level" );
 735     }
 736
 737     return VLC_SUCCESS;
 738
 739  error:
 740     p_aout->output.p_sys->p_dsobject = NULL;
 741     if( p_aout->output.p_sys->hdsound_dll )
 742     {
 743         FreeLibrary( p_aout->output.p_sys->hdsound_dll );
 744         p_aout->output.p_sys->hdsound_dll = NULL;
 745     }
 746     return VLC_EGENERIC;
 747
 748 }
 749
 750 /*****************************************************************************
 751  * CreateDSBuffer: Creates a direct sound buffer of the required format.
 752  *****************************************************************************
 753  * This function creates the buffer we'll use to play audio.
 754  * In DirectSound there are two kinds of buffers:
 755  * - the primary buffer: which is the actual buffer that the soundcard plays
 756  * - the secondary buffer(s): these buffers are the one actually used by
 757  *    applications and DirectSound takes care of mixing them into the primary.
 758  *
 759  * Once you create a secondary buffer, you cannot change its format anymore so
 760  * you have to release the current one and create another.
 761  *****************************************************************************/
 762 static int CreateDSBuffer( aout_instance_t *p_aout, int i_format,
 763                            int i_channels, int i_nb_channels, int i_rate,
 764                            int i_bytes_per_frame, bool b_probe )
 765 {
 766     WAVEFORMATEXTENSIBLE waveformat;
 767     DSBUFFERDESC         dsbdesc;
 768     unsigned int         i;
 769
 770     /* First set the sound buffer format */
 771     waveformat.dwChannelMask = 0;
 772     for( i = 0; i < sizeof(pi_channels_src)/sizeof(uint32_t); i++ )
 773     {
 774         if( i_channels & pi_channels_src[i] )
 775             waveformat.dwChannelMask |= pi_channels_in[i];
 776     }
 777
 778     switch( i_format )
 779     {
 780     case VLC_CODEC_SPDIFL:
 781         i_nb_channels = 2;
 782         /* To prevent channel re-ordering */
 783         waveformat.dwChannelMask = SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT;
 784         waveformat.Format.wBitsPerSample = 16;
 785         waveformat.Samples.wValidBitsPerSample =
 786             waveformat.Format.wBitsPerSample;
 787         waveformat.Format.wFormatTag = WAVE_FORMAT_DOLBY_AC3_SPDIF;
 788         waveformat.SubFormat = _KSDATAFORMAT_SUBTYPE_DOLBY_AC3_SPDIF;
 789         break;
 790
 791     case VLC_CODEC_FL32:
 792         waveformat.Format.wBitsPerSample = sizeof(float) * 8;
 793         waveformat.Samples.wValidBitsPerSample =
 794             waveformat.Format.wBitsPerSample;
 795         waveformat.Format.wFormatTag = WAVE_FORMAT_IEEE_FLOAT;
 796         waveformat.SubFormat = _KSDATAFORMAT_SUBTYPE_IEEE_FLOAT;
 797         break;
 798
 799     case VLC_CODEC_S16L:
 800         waveformat.Format.wBitsPerSample = 16;
 801         waveformat.Samples.wValidBitsPerSample =
 802             waveformat.Format.wBitsPerSample;
 803         waveformat.Format.wFormatTag = WAVE_FORMAT_PCM;
 804         waveformat.SubFormat = _KSDATAFORMAT_SUBTYPE_PCM;
 805         break;
 806     }
 807
 808     waveformat.Format.nChannels = i_nb_channels;
 809     waveformat.Format.nSamplesPerSec = i_rate;
 810     waveformat.Format.nBlockAlign =
 811         waveformat.Format.wBitsPerSample / 8 * i_nb_channels;
 812     waveformat.Format.nAvgBytesPerSec =
 813         waveformat.Format.nSamplesPerSec * waveformat.Format.nBlockAlign;
 814
 815     p_aout->output.p_sys->i_bits_per_sample = waveformat.Format.wBitsPerSample;
 816     p_aout->output.p_sys->i_channels = i_nb_channels;
 817
 818     /* Then fill in the direct sound descriptor */
 819     memset(&dsbdesc, 0, sizeof(DSBUFFERDESC));
 820     dsbdesc.dwSize = sizeof(DSBUFFERDESC);
 821     dsbdesc.dwFlags = DSBCAPS_GETCURRENTPOSITION2/* Better position accuracy */
 822                     | DSBCAPS_GLOBALFOCUS;      /* Allows background playing */
 823
 824     /* Only use the new WAVE_FORMAT_EXTENSIBLE format for multichannel audio */
 825     if( i_nb_channels <= 2 )
 826     {
 827         waveformat.Format.cbSize = 0;
 828     }
 829     else
 830     {
 831         waveformat.Format.wFormatTag = WAVE_FORMAT_EXTENSIBLE;
 832         waveformat.Format.cbSize =
 833             sizeof(WAVEFORMATEXTENSIBLE) - sizeof(WAVEFORMATEX);
 834
 835         /* Needed for 5.1 on emu101k */
 836         dsbdesc.dwFlags |= DSBCAPS_LOCHARDWARE;
 837     }
 838
 839     dsbdesc.dwBufferBytes = FRAMES_NUM * i_bytes_per_frame;   /* buffer size */
 840     dsbdesc.lpwfxFormat = (WAVEFORMATEX *)&waveformat;
 841
 842     if FAILED( IDirectSound_CreateSoundBuffer(
 843                    p_aout->output.p_sys->p_dsobject, &dsbdesc,
 844                    &p_aout->output.p_sys->p_dsbuffer, NULL) )
 845     {
 846         if( dsbdesc.dwFlags & DSBCAPS_LOCHARDWARE )
 847         {
 848             /* Try without DSBCAPS_LOCHARDWARE */
 849             dsbdesc.dwFlags &= ~DSBCAPS_LOCHARDWARE;
 850             if FAILED( IDirectSound_CreateSoundBuffer(
 851                    p_aout->output.p_sys->p_dsobject, &dsbdesc,
 852                    &p_aout->output.p_sys->p_dsbuffer, NULL) )
 853             {
 854                 return VLC_EGENERIC;
 855             }
 856             if( !b_probe )
 857                 msg_Dbg( p_aout, "couldn't use hardware sound buffer" );
 858         }
 859         else
 860         {
 861             return VLC_EGENERIC;
 862         }
 863     }
 864
 865     /* Stop here if we were just probing */
 866     if( b_probe )
 867     {
 868         IDirectSoundBuffer_Release( p_aout->output.p_sys->p_dsbuffer );
 869         p_aout->output.p_sys->p_dsbuffer = NULL;
 870         return VLC_SUCCESS;
 871     }
 872
 873     p_aout->output.p_sys->i_frame_size = i_bytes_per_frame;
 874     p_aout->output.p_sys->i_channel_mask = waveformat.dwChannelMask;
 875     p_aout->output.p_sys->b_chan_reorder =
 876         aout_CheckChannelReorder( pi_channels_in, pi_channels_out,
 877                                   waveformat.dwChannelMask, i_nb_channels,
 878                                   p_aout->output.p_sys->pi_chan_table );
 879
 880     if( p_aout->output.p_sys->b_chan_reorder )
 881     {
 882         msg_Dbg( p_aout, "channel reordering needed" );
 883     }
 884
 885     return VLC_SUCCESS;
 886 }
 887
 888 /*****************************************************************************
 889  * CreateDSBufferPCM: creates a PCM direct sound buffer.
 890  *****************************************************************************
 891  * We first try to create a WAVE_FORMAT_IEEE_FLOAT buffer if supported by
 892  * the hardware, otherwise we create a WAVE_FORMAT_PCM buffer.
 893  ****************************************************************************/
 894 static int CreateDSBufferPCM( aout_instance_t *p_aout, vlc_fourcc_t *i_format,
 895                               int i_channels, int i_nb_channels, int i_rate,
 896                               bool b_probe )
 897 {
 898     /* Float32 audio samples are not supported for 5.1 output on the emu101k */
 899     if( !var_GetBool( p_aout, "directx-audio-float32" ) ||
 900         i_nb_channels > 2 ||
 901         CreateDSBuffer( p_aout, VLC_CODEC_FL32,
 902                         i_channels, i_nb_channels, i_rate,
 903                         FRAME_SIZE * 4 * i_nb_channels, b_probe )
 904         != VLC_SUCCESS )
 905     {
 906         if ( CreateDSBuffer( p_aout, VLC_CODEC_S16L,
 907                              i_channels, i_nb_channels, i_rate,
 908                              FRAME_SIZE * 2 * i_nb_channels, b_probe )
 909              != VLC_SUCCESS )
 910         {
 911             return VLC_EGENERIC;
 912         }
 913         else
 914         {
 915             *i_format = VLC_CODEC_S16L;
 916             return VLC_SUCCESS;
 917         }
 918     }
 919     else
 920     {
 921         *i_format = VLC_CODEC_FL32;
 922         return VLC_SUCCESS;
 923     }
 924 }
 925
 926 /*****************************************************************************
 927  * DestroyDSBuffer
 928  *****************************************************************************
 929  * This function destroys the secondary buffer.
 930  *****************************************************************************/
 931 static void DestroyDSBuffer( aout_instance_t *p_aout )
 932 {
 933     if( p_aout->output.p_sys->p_dsbuffer )
 934     {
 935         IDirectSoundBuffer_Release( p_aout->output.p_sys->p_dsbuffer );
 936         p_aout->output.p_sys->p_dsbuffer = NULL;
 937     }
 938 }
 939
 940 /*****************************************************************************
 941  * FillBuffer: Fill in one of the direct sound frame buffers.
 942  *****************************************************************************
 943  * Returns VLC_SUCCESS on success.
 944  *****************************************************************************/
 945 static int FillBuffer( aout_instance_t *p_aout, int i_frame,
 946                        aout_buffer_t *p_buffer )
 947 {
 948     notification_thread_t *p_notif = p_aout->output.p_sys->p_notif;
 949     aout_sys_t *p_sys = p_aout->output.p_sys;
 950     void *p_write_position, *p_wrap_around;
 951     unsigned long l_bytes1, l_bytes2;
 952     HRESULT dsresult;
 953
 954     /* Before copying anything, we have to lock the buffer */
 955     dsresult = IDirectSoundBuffer_Lock(
 956                 p_sys->p_dsbuffer,                              /* DS buffer */
 957                 i_frame * p_notif->i_frame_size,             /* Start offset */
 958                 p_notif->i_frame_size,                    /* Number of bytes */
 959                 &p_write_position,                  /* Address of lock start */
 960                 &l_bytes1,       /* Count of bytes locked before wrap around */
 961                 &p_wrap_around,            /* Buffer adress (if wrap around) */
 962                 &l_bytes2,               /* Count of bytes after wrap around */
 963                 0 );                                                /* Flags */
 964     if( dsresult == DSERR_BUFFERLOST )
 965     {
 966         IDirectSoundBuffer_Restore( p_sys->p_dsbuffer );
 967         dsresult = IDirectSoundBuffer_Lock(
 968                                p_sys->p_dsbuffer,
 969                                i_frame * p_notif->i_frame_size,
 970                                p_notif->i_frame_size,
 971                                &p_write_position,
 972                                &l_bytes1,
 973                                &p_wrap_around,
 974                                &l_bytes2,
 975                                0 );
 976     }
 977     if( dsresult != DS_OK )
 978     {
 979         msg_Warn( p_notif, "cannot lock buffer" );
 980         if( p_buffer ) aout_BufferFree( p_buffer );
 981         return VLC_EGENERIC;
 982     }
 983
 984     if( p_buffer == NULL )
 985     {
 986         memset( p_write_position, 0, l_bytes1 );
 987     }
 988     else
 989     {
 990         if( p_sys->b_chan_reorder )
 991         {
 992             /* Do the channel reordering here */
 993             aout_ChannelReorder( p_buffer->p_buffer, p_buffer->i_buffer,
 994                                  p_sys->i_channels, p_sys->pi_chan_table,
 995                                  p_sys->i_bits_per_sample );
 996         }
 997
 998         vlc_memcpy( p_write_position, p_buffer->p_buffer, l_bytes1 );
 999         aout_BufferFree( p_buffer );
1000     }
1001
1002     /* Now the data has been copied, unlock the buffer */
1003     IDirectSoundBuffer_Unlock( p_sys->p_dsbuffer, p_write_position, l_bytes1,
1004                                p_wrap_around, l_bytes2 );
1005
1006     p_notif->i_write_slot = (i_frame + 1) % FRAMES_NUM;
1007     return VLC_SUCCESS;
1008 }
1009
1010 /*****************************************************************************
1011  * DirectSoundThread: this thread will capture play notification events.
1012  *****************************************************************************
1013  * We use this thread to emulate a callback mechanism. The thread probes for
1014  * event notification and fills up the DS secondary buffer when needed.
1015  *****************************************************************************/
1016 static void* DirectSoundThread( vlc_object_t *p_this )
1017 {
1018     notification_thread_t *p_notif = (notification_thread_t*)p_this;
1019     aout_instance_t *p_aout = p_notif->p_aout;
1020     mtime_t last_time;
1021     int canc = vlc_savecancel ();
1022
1023     /* We don't want any resampling when using S/PDIF output */
1024     bool b_sleek = (p_aout->output.output.i_format == VLC_CODEC_SPDIFL);
1025
1026     msg_Dbg( p_notif, "DirectSoundThread ready" );
1027
1028     /* Wait here until Play() is called */
1029     WaitForSingleObject( p_notif->event, INFINITE );
1030
1031     if( vlc_object_alive (p_notif) )
1032     {
1033         HRESULT dsresult;
1034         mwait( p_notif->start_date - AOUT_PTS_TOLERANCE / 2 );
1035
1036         /* start playing the buffer */
1037         dsresult = IDirectSoundBuffer_Play( p_aout->output.p_sys->p_dsbuffer,
1038                                         0,                         /* Unused */
1039                                         0,                         /* Unused */
1040                                         DSBPLAY_LOOPING );          /* Flags */
1041         if( dsresult == DSERR_BUFFERLOST )
1042         {
1043             IDirectSoundBuffer_Restore( p_aout->output.p_sys->p_dsbuffer );
1044             dsresult = IDirectSoundBuffer_Play(
1045                                             p_aout->output.p_sys->p_dsbuffer,
1046                                             0,                     /* Unused */
1047                                             0,                     /* Unused */
1048                                             DSBPLAY_LOOPING );      /* Flags */
1049         }
1050         if( dsresult != DS_OK )
1051         {
1052             msg_Err( p_aout, "cannot start playing buffer" );
1053         }
1054     }
1055     last_time = mdate();
1056
1057     while( vlc_object_alive (p_notif) )
1058     {
1059         DWORD l_read;
1060         int l_queued = 0, l_free_slots;
1061         unsigned i_frame_siz = p_aout->output.i_nb_samples;
1062         mtime_t mtime = mdate();
1063         int i;
1064
1065         /*
1066          * Fill in as much audio data as we can in our circular buffer
1067          */
1068
1069         /* Find out current play position */
1070         if FAILED( IDirectSoundBuffer_GetCurrentPosition(
1071                    p_aout->output.p_sys->p_dsbuffer, &l_read, NULL ) )
1072         {
1073             msg_Err( p_aout, "GetCurrentPosition() failed!" );
1074             l_read = 0;
1075         }
1076
1077         /* Detect underruns */
1078         if( l_queued && mtime - last_time >
1079             INT64_C(1000000) * l_queued / p_aout->output.output.i_rate )
1080         {
1081             msg_Dbg( p_aout, "detected underrun!" );
1082         }
1083         last_time = mtime;
1084
1085         /* Try to fill in as many frame buffers as possible */
1086         l_read /= (p_aout->output.output.i_bytes_per_frame /
1087             p_aout->output.output.i_frame_length);
1088         l_queued = p_notif->i_write_slot * i_frame_siz - l_read;
1089         if( l_queued < 0 ) l_queued += (i_frame_siz * FRAMES_NUM);
1090         l_free_slots = (FRAMES_NUM * i_frame_siz - l_queued) / i_frame_siz;
1091
1092         for( i = 0; i < l_free_slots; i++ )
1093         {
1094             aout_buffer_t *p_buffer = aout_OutputNextBuffer( p_aout,
1095                 mtime + INT64_C(1000000) * (i * i_frame_siz + l_queued) /
1096                 p_aout->output.output.i_rate, b_sleek );
1097
1098             /* If there is no audio data available and we have some buffered
1099              * already, then just wait for the next time */
1100             if( !p_buffer && (i || l_queued / i_frame_siz) ) break;
1101
1102             if( FillBuffer( p_aout, p_notif->i_write_slot % FRAMES_NUM,
1103                             p_buffer ) != VLC_SUCCESS ) break;
1104         }
1105
1106         /* Sleep a reasonable amount of time */
1107         l_queued += (i * i_frame_siz);
1108         msleep( INT64_C(1000000) * l_queued / p_aout->output.output.i_rate / 2 );
1109     }
1110
1111     /* make sure the buffer isn't playing */
1112     IDirectSoundBuffer_Stop( p_aout->output.p_sys->p_dsbuffer );
1113
1114     /* free the event */
1115     CloseHandle( p_notif->event );
1116
1117     vlc_restorecancel (canc);
1118     msg_Dbg( p_notif, "DirectSoundThread exiting" );
1119     return NULL;
1120 }
1121
1122 /*****************************************************************************
1123  * CallBackConfigNBEnum: callback to get the number of available devices
1124  *****************************************************************************/
1125 static int CALLBACK CallBackConfigNBEnum( LPGUID p_guid, LPCSTR psz_desc,
1126                                              LPCSTR psz_mod, LPVOID p_nb )
1127 {
1128     VLC_UNUSED( psz_mod ); VLC_UNUSED( psz_desc ); VLC_UNUSED( p_guid );
1129
1130     int * a = (int *)p_nb;
1131     (*a)++;
1132     return 1;
1133 }
1134
1135 /*****************************************************************************
1136  * CallBackConfigEnum: callback to add available devices to the preferences list
1137  *****************************************************************************/
1138 static int CALLBACK CallBackConfigEnum( LPGUID p_guid, LPCSTR psz_desc,
1139                                              LPCSTR psz_mod, LPVOID _p_item )
1140 {
1141     VLC_UNUSED( psz_mod );
1142     VLC_UNUSED( p_guid );
1143
1144     module_config_t *p_item = (module_config_t *) _p_item;
1145
1146     p_item->ppsz_list[p_item->i_list] = FromLocaleDup(psz_desc);
1147     p_item->ppsz_list_text[p_item->i_list] = FromLocaleDup(psz_desc);
1148     p_item->i_list = p_item->i_list +1;
1149     return 1;
1150 }
1151
1152 /*****************************************************************************
1153  * ReloadDirectXDevices: store the list of devices in preferences
1154  *****************************************************************************/
1155 static int ReloadDirectXDevices( vlc_object_t *p_this, char const *psz_name,
1156                                  vlc_value_t newval, vlc_value_t oldval, void *data )
1157 {
1158     VLC_UNUSED( newval ); VLC_UNUSED( oldval ); VLC_UNUSED( data );
1159     module_config_t *p_item = config_FindConfig( p_this, psz_name );
1160     if( !p_item ) return VLC_SUCCESS;
1161
1162     /* Clear-up the current list */
1163     if( p_item->i_list )
1164     {
1165         int i;
1166         for( i = 0; i < p_item->i_list; i++ )
1167         {
1168             free((char *)(p_item->ppsz_list[i]) );
1169             free((char *)(p_item->ppsz_list_text[i]) );
1170         }
1171     }
1172
1173     HRESULT (WINAPI *OurDirectSoundEnumerate)(LPDSENUMCALLBACK, LPVOID);
1174
1175     HANDLE hdsound_dll = LoadLibrary("DSOUND.DLL");
1176     if( hdsound_dll == NULL )
1177     {
1178         msg_Warn( p_this, "cannot open DSOUND.DLL" );
1179     }
1180
1181     /* Get DirectSoundEnumerate */
1182     OurDirectSoundEnumerate = (void *)
1183        GetProcAddress( hdsound_dll,
1184                        "DirectSoundEnumerateW" );
1185     int nb_devices = 0;
1186     OurDirectSoundEnumerate(CallBackConfigNBEnum, &nb_devices);
1187     msg_Dbg(p_this,"found %d devices", nb_devices);
1188
1189     p_item->ppsz_list = xrealloc( p_item->ppsz_list,
1190                           nb_devices * sizeof(char *) );
1191     p_item->ppsz_list_text = xrealloc( p_item->ppsz_list_text,
1192                           nb_devices * sizeof(char *) );
1193
1194     p_item->i_list = 0;
1195     OurDirectSoundEnumerate(CallBackConfigEnum, p_item);
1196
1197     FreeLibrary(hdsound_dll);
1198
1199     /* Signal change to the interface */
1200     p_item->b_dirty = true;
1201
1202     return VLC_SUCCESS;
1203 }
1204