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