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