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, "OpenAudio" );
 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",
 195                  psz_speaker );
 196         msg_Err( p_aout, "Defaulting to Windows default speaker config");
 197         i = 0;
 198     }
 199     free( psz_speaker );
 200     p_aout->output.p_sys->i_speaker_setup = i;
 201
 202     p_aout->output.p_sys->p_device_guid = 0;
 203
 204     /* Initialise DirectSound */
 205     if( InitDirectSound( p_aout ) )
 206     {
 207         msg_Err( p_aout, "cannot initialize DirectSound" );
 208         goto error;
 209     }
 210
 211     if( var_Type( p_aout, "audio-device" ) == 0 )
 212     {
 213         Probe( p_aout );
 214     }
 215
 216     if( var_Get( p_aout, "audio-device", &val ) < 0 )
 217     {
 218         /* Probe() has failed. */
 219         goto error;
 220     }
 221
 222     /* Open the device */
 223     if( val.i_int == AOUT_VAR_SPDIF )
 224     {
 225         p_aout->output.output.i_format = VLC_CODEC_SPDIFL;
 226
 227         /* Calculate the frame size in bytes */
 228         p_aout->output.i_nb_samples = A52_FRAME_NB;
 229         p_aout->output.output.i_bytes_per_frame = AOUT_SPDIF_SIZE;
 230         p_aout->output.output.i_frame_length = A52_FRAME_NB;
 231         p_aout->output.p_sys->i_frame_size =
 232             p_aout->output.output.i_bytes_per_frame;
 233
 234         if( CreateDSBuffer( p_aout, VLC_CODEC_SPDIFL,
 235                             p_aout->output.output.i_physical_channels,
 236                             aout_FormatNbChannels( &p_aout->output.output ),
 237                             p_aout->output.output.i_rate,
 238                             p_aout->output.p_sys->i_frame_size, false )
 239             != VLC_SUCCESS )
 240         {
 241             msg_Err( p_aout, "cannot open directx audio device" );
 242             free( p_aout->output.p_sys );
 243             return VLC_EGENERIC;
 244         }
 245
 246         aout_VolumeNoneInit( p_aout );
 247     }
 248     else
 249     {
 250         if( val.i_int == AOUT_VAR_5_1 )
 251         {
 252             p_aout->output.output.i_physical_channels
 253                 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
 254                    | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT
 255                    | AOUT_CHAN_LFE;
 256         }
 257         else if( val.i_int == AOUT_VAR_7_1 )
 258         {
 259                     p_aout->output.output.i_physical_channels
 260                         = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
 261                            | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT
 262                            | AOUT_CHAN_MIDDLELEFT | AOUT_CHAN_MIDDLERIGHT
 263                            | AOUT_CHAN_LFE;
 264         }
 265         else if( val.i_int == AOUT_VAR_3F2R )
 266         {
 267             p_aout->output.output.i_physical_channels
 268                 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
 269                    | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
 270         }
 271         else if( val.i_int == AOUT_VAR_2F2R )
 272         {
 273             p_aout->output.output.i_physical_channels
 274                 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT
 275                    | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
 276         }
 277         else if( val.i_int == AOUT_VAR_MONO )
 278         {
 279             p_aout->output.output.i_physical_channels = AOUT_CHAN_CENTER;
 280         }
 281         else
 282         {
 283             p_aout->output.output.i_physical_channels
 284                 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
 285         }
 286
 287         if( CreateDSBufferPCM( p_aout, &p_aout->output.output.i_format,
 288                                p_aout->output.output.i_physical_channels,
 289                                aout_FormatNbChannels( &p_aout->output.output ),
 290                                p_aout->output.output.i_rate, false )
 291             != VLC_SUCCESS )
 292         {
 293             msg_Err( p_aout, "cannot open directx audio device" );
 294             free( p_aout->output.p_sys );
 295             return VLC_EGENERIC;
 296         }
 297
 298         /* Calculate the frame size in bytes */
 299         p_aout->output.i_nb_samples = FRAME_SIZE;
 300         aout_FormatPrepare( &p_aout->output.output );
 301         aout_VolumeSoftInit( p_aout );
 302     }
 303
 304     /* Now we need to setup our DirectSound play notification structure */
 305     p_aout->output.p_sys->p_notif =
 306         vlc_object_create( p_aout, sizeof(notification_thread_t) );
 307     p_aout->output.p_sys->p_notif->p_aout = p_aout;
 308
 309     p_aout->output.p_sys->p_notif->event = CreateEvent( 0, FALSE, FALSE, 0 );
 310     p_aout->output.p_sys->p_notif->i_frame_size =
 311         p_aout->output.p_sys->i_frame_size;
 312
 313     /* then launch the notification thread */
 314     msg_Dbg( p_aout, "creating DirectSoundThread" );
 315     if( vlc_thread_create( p_aout->output.p_sys->p_notif,
 316                            "DirectSound Notification Thread",
 317                            DirectSoundThread,
 318                            VLC_THREAD_PRIORITY_HIGHEST ) )
 319     {
 320         msg_Err( p_aout, "cannot create DirectSoundThread" );
 321         CloseHandle( p_aout->output.p_sys->p_notif->event );
 322         vlc_object_release( p_aout->output.p_sys->p_notif );
 323         p_aout->output.p_sys->p_notif = NULL;
 324         goto error;
 325     }
 326
 327     vlc_object_attach( p_aout->output.p_sys->p_notif, p_aout );
 328
 329     return VLC_SUCCESS;
 330
 331  error:
 332     CloseAudio( VLC_OBJECT(p_aout) );
 333     return VLC_EGENERIC;
 334 }
 335
 336 /*****************************************************************************
 337  * Probe: probe the audio device for available formats and channels
 338  *****************************************************************************/
 339 static void Probe( aout_instance_t * p_aout )
 340 {
 341     vlc_value_t val, text;
 342     vlc_fourcc_t i_format;
 343     unsigned int i_physical_channels;
 344     DWORD ui_speaker_config;
 345     bool is_default_output_set = false;
 346
 347     var_Create( p_aout, "audio-device", VLC_VAR_INTEGER | VLC_VAR_HASCHOICE );
 348     text.psz_string = _("Audio Device");
 349     var_Change( p_aout, "audio-device", VLC_VAR_SETTEXT, &text, NULL );
 350
 351     /* Test for 5.1 support */
 352     i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
 353                           AOUT_CHAN_CENTER | AOUT_CHAN_REARLEFT |
 354                           AOUT_CHAN_REARRIGHT | AOUT_CHAN_LFE;
 355     if( p_aout->output.output.i_physical_channels == i_physical_channels )
 356     {
 357         if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 6,
 358                                p_aout->output.output.i_rate, true )
 359             == VLC_SUCCESS )
 360         {
 361             val.i_int = AOUT_VAR_5_1;
 362             text.psz_string = (char*) "5.1";
 363             var_Change( p_aout, "audio-device",
 364                         VLC_VAR_ADDCHOICE, &val, &text );
 365             var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
 366             is_default_output_set = true;
 367             msg_Dbg( p_aout, "device supports 5.1 channels" );
 368         }
 369     }
 370
 371     /* Test for 7.1 support */
 372     i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
 373                              AOUT_CHAN_CENTER | AOUT_CHAN_REARLEFT |
 374                              AOUT_CHAN_MIDDLELEFT | AOUT_CHAN_MIDDLERIGHT |
 375                              AOUT_CHAN_REARRIGHT | AOUT_CHAN_LFE;
 376     if( p_aout->output.output.i_physical_channels == i_physical_channels )
 377     {
 378         if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 8,
 379                                   p_aout->output.output.i_rate, true )
 380             == VLC_SUCCESS )
 381         {
 382             val.i_int = AOUT_VAR_7_1;
 383             text.psz_string = (char*) "7.1";
 384             var_Change( p_aout, "audio-device",
 385                         VLC_VAR_ADDCHOICE, &val, &text );
 386             var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
 387             is_default_output_set = true;
 388             msg_Dbg( p_aout, "device supports 7.1 channels" );
 389         }
 390     }
 391
 392     /* Test for 3 Front 2 Rear support */
 393     i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
 394                           AOUT_CHAN_CENTER | AOUT_CHAN_REARLEFT |
 395                           AOUT_CHAN_REARRIGHT;
 396     if( p_aout->output.output.i_physical_channels == i_physical_channels )
 397     {
 398         if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 5,
 399                                p_aout->output.output.i_rate, true )
 400             == VLC_SUCCESS )
 401         {
 402             val.i_int = AOUT_VAR_3F2R;
 403             text.psz_string = _("3 Front 2 Rear");
 404             var_Change( p_aout, "audio-device",
 405                         VLC_VAR_ADDCHOICE, &val, &text );
 406             if(!is_default_output_set)
 407             {
 408                 var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
 409                 is_default_output_set = true;
 410             }
 411             msg_Dbg( p_aout, "device supports 5 channels" );
 412         }
 413     }
 414
 415     /* Test for 2 Front 2 Rear support */
 416     i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
 417                           AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
 418     if( ( p_aout->output.output.i_physical_channels & i_physical_channels )
 419         == i_physical_channels )
 420     {
 421         if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 4,
 422                                p_aout->output.output.i_rate, true )
 423             == VLC_SUCCESS )
 424         {
 425             val.i_int = AOUT_VAR_2F2R;
 426             text.psz_string = _("2 Front 2 Rear");
 427             var_Change( p_aout, "audio-device",
 428                         VLC_VAR_ADDCHOICE, &val, &text );
 429             if(!is_default_output_set)
 430             {
 431                 var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
 432                 is_default_output_set = true;
 433             }
 434             msg_Dbg( p_aout, "device supports 4 channels" );
 435         }
 436     }
 437
 438     /* Test for stereo support */
 439     i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
 440     if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 2,
 441                            p_aout->output.output.i_rate, true )
 442         == VLC_SUCCESS )
 443     {
 444         val.i_int = AOUT_VAR_STEREO;
 445         text.psz_string = _("Stereo");
 446         var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
 447         if(!is_default_output_set)
 448         {
 449             var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
 450             is_default_output_set = true;
 451             msg_Dbg( p_aout, "device supports 2 channels (DEFAULT!)" );
 452         }
 453         else msg_Dbg( p_aout, "device supports 2 channels" );
 454     }
 455
 456     /* Test for mono support */
 457     i_physical_channels = AOUT_CHAN_CENTER;
 458     if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 1,
 459                            p_aout->output.output.i_rate, true )
 460         == VLC_SUCCESS )
 461     {
 462         val.i_int = AOUT_VAR_MONO;
 463         text.psz_string = _("Mono");
 464         var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
 465         msg_Dbg( p_aout, "device supports 1 channel" );
 466     }
 467
 468     /* Check the speaker configuration to determine which channel config should
 469      * be the default */
 470     if FAILED( IDirectSound_GetSpeakerConfig( p_aout->output.p_sys->p_dsobject,
 471                                               &ui_speaker_config ) )
 472     {
 473         ui_speaker_config = DSSPEAKER_STEREO;
 474         msg_Dbg( p_aout, "GetSpeakerConfig failed" );
 475     }
 476     switch( DSSPEAKER_CONFIG(ui_speaker_config) )
 477     {
 478     case DSSPEAKER_7POINT1:
 479         msg_Dbg( p_aout, "Windows says your SpeakerConfig is 7.1" );
 480         val.i_int = AOUT_VAR_7_1;
 481         break;
 482     case DSSPEAKER_5POINT1:
 483         msg_Dbg( p_aout, "Windows says your SpeakerConfig is 5.1" );
 484         val.i_int = AOUT_VAR_5_1;
 485         break;
 486     case DSSPEAKER_QUAD:
 487         msg_Dbg( p_aout, "Windows says your SpeakerConfig is Quad" );
 488         val.i_int = AOUT_VAR_2F2R;
 489         break;
 490 #if 0 /* Lots of people just get their settings wrong and complain that
 491        * this is a problem with VLC so just don't ever set mono by default. */
 492     case DSSPEAKER_MONO:
 493         val.i_int = AOUT_VAR_MONO;
 494         break;
 495 #endif
 496     case DSSPEAKER_SURROUND:
 497         msg_Dbg( p_aout, "Windows says your SpeakerConfig is surround" );
 498     case DSSPEAKER_STEREO:
 499         msg_Dbg( p_aout, "Windows says your SpeakerConfig is stereo" );
 500     default:
 501         /* If nothing else is found, choose stereo output */
 502         val.i_int = AOUT_VAR_STEREO;
 503         break;
 504     }
 505
 506     /* Check if we want to override speaker config */
 507     switch( p_aout->output.p_sys->i_speaker_setup )
 508     {
 509     case 0: /* Default value aka Windows default speaker setup */
 510         break;
 511     case 1: /* Mono */
 512         msg_Dbg( p_aout, "SpeakerConfig is forced to Mono" );
 513         val.i_int = AOUT_VAR_MONO;
 514         break;
 515     case 2: /* Stereo */
 516         msg_Dbg( p_aout, "SpeakerConfig is forced to Stereo" );
 517         val.i_int = AOUT_VAR_STEREO;
 518         break;
 519     case 3: /* Quad */
 520         msg_Dbg( p_aout, "SpeakerConfig is forced to Quad" );
 521         val.i_int = AOUT_VAR_2F2R;
 522         break;
 523     case 4: /* 5.1 */
 524         msg_Dbg( p_aout, "SpeakerConfig is forced to 5.1" );
 525         val.i_int = AOUT_VAR_5_1;
 526         break;
 527     case 5: /* 7.1 */
 528         msg_Dbg( p_aout, "SpeakerConfig is forced to 7.1" );
 529         val.i_int = AOUT_VAR_7_1;
 530         break;
 531     default:
 532         msg_Dbg( p_aout, "SpeakerConfig is forced to non-existing value" );
 533         break;
 534     }
 535
 536     var_Set( p_aout, "audio-device", val );
 537
 538     /* Test for SPDIF support */
 539     if ( AOUT_FMT_NON_LINEAR( &p_aout->output.output ) )
 540     {
 541         if( CreateDSBuffer( p_aout, VLC_CODEC_SPDIFL,
 542                             p_aout->output.output.i_physical_channels,
 543                             aout_FormatNbChannels( &p_aout->output.output ),
 544                             p_aout->output.output.i_rate,
 545                             AOUT_SPDIF_SIZE, true )
 546             == VLC_SUCCESS )
 547         {
 548             msg_Dbg( p_aout, "device supports A/52 over S/PDIF" );
 549             val.i_int = AOUT_VAR_SPDIF;
 550             text.psz_string = _("A/52 over S/PDIF");
 551             var_Change( p_aout, "audio-device",
 552                         VLC_VAR_ADDCHOICE, &val, &text );
 553             if( config_GetInt( p_aout, "spdif" ) )
 554                 var_Set( p_aout, "audio-device", val );
 555         }
 556     }
 557
 558     var_Change( p_aout, "audio-device", VLC_VAR_CHOICESCOUNT, &val, NULL );
 559     if( val.i_int <= 0 )
 560     {
 561         /* Probe() has failed. */
 562         var_Destroy( p_aout, "audio-device" );
 563         return;
 564     }
 565
 566     var_AddCallback( p_aout, "audio-device", aout_ChannelsRestart, NULL );
 567     var_SetBool( p_aout, "intf-change", true );
 568 }
 569
 570 /*****************************************************************************
 571  * Play: we'll start playing the directsound buffer here because at least here
 572  *       we know the first buffer has been put in the aout fifo and we also
 573  *       know its date.
 574  *****************************************************************************/
 575 static void Play( aout_instance_t *p_aout )
 576 {
 577     if( !p_aout->output.p_sys->b_playing )
 578     {
 579         aout_buffer_t *p_buffer;
 580         int i;
 581
 582         p_aout->output.p_sys->b_playing = 1;
 583
 584         /* get the playing date of the first aout buffer */
 585         p_aout->output.p_sys->p_notif->start_date =
 586             aout_FifoFirstDate( p_aout, &p_aout->output.fifo );
 587
 588         /* fill in the first samples */
 589         for( i = 0; i < FRAMES_NUM; i++ )
 590         {
 591             p_buffer = aout_FifoPop( p_aout, &p_aout->output.fifo );
 592             if( !p_buffer ) break;
 593             FillBuffer( p_aout, i, p_buffer );
 594         }
 595
 596         /* wake up the audio output thread */
 597         SetEvent( p_aout->output.p_sys->p_notif->event );
 598     }
 599 }
 600
 601 /*****************************************************************************
 602  * CloseAudio: close the audio device
 603  *****************************************************************************/
 604 static void CloseAudio( vlc_object_t *p_this )
 605 {
 606     aout_instance_t * p_aout = (aout_instance_t *)p_this;
 607     aout_sys_t *p_sys = p_aout->output.p_sys;
 608
 609     msg_Dbg( p_aout, "closing audio device" );
 610
 611     /* kill the position notification thread, if any */
 612     if( p_sys->p_notif )
 613     {
 614         vlc_object_detach( p_sys->p_notif );
 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, LPCSTR psz_desc,
 640                                              LPCSTR 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     msg_Dbg( p_aout, "found device: %s", psz_desc );
 647
 648     if( p_aout->output.p_sys->psz_device && !strcmp(p_aout->output.p_sys->psz_device, psz_desc) && p_guid )
 649     {
 650         /* Use the device corresponding to psz_device */
 651         p_aout->output.p_sys->p_device_guid = malloc( sizeof( GUID ) );
 652         *p_aout->output.p_sys->p_device_guid = *p_guid;
 653         msg_Dbg( p_aout, "using device: %s", psz_desc );
 654     }
 655     else
 656     {
 657         /* If no default device has been selected, chose the first one */
 658         if( !p_aout->output.p_sys->psz_device && p_guid )
 659         {
 660             p_aout->output.p_sys->psz_device = strdup( psz_desc );
 661             p_aout->output.p_sys->p_device_guid = malloc( sizeof( GUID ) );
 662             *p_aout->output.p_sys->p_device_guid = *p_guid;
 663             msg_Dbg( p_aout, "using device: %s", psz_desc );
 664         }
 665     }
 666     return 1;
 667 }
 668
 669 /*****************************************************************************
 670  * InitDirectSound: handle all the gory details of DirectSound initialisation
 671  *****************************************************************************/
 672 static int InitDirectSound( aout_instance_t *p_aout )
 673 {
 674     HRESULT (WINAPI *OurDirectSoundCreate)(LPGUID, LPDIRECTSOUND *, LPUNKNOWN);
 675     HRESULT (WINAPI *OurDirectSoundEnumerate)(LPDSENUMCALLBACK, LPVOID);
 676
 677     p_aout->output.p_sys->hdsound_dll = LoadLibrary("DSOUND.DLL");
 678     if( p_aout->output.p_sys->hdsound_dll == NULL )
 679     {
 680         msg_Warn( p_aout, "cannot open DSOUND.DLL" );
 681         goto error;
 682     }
 683
 684     OurDirectSoundCreate = (void *)
 685         GetProcAddress( p_aout->output.p_sys->hdsound_dll,
 686                         "DirectSoundCreate" );
 687     if( OurDirectSoundCreate == NULL )
 688     {
 689         msg_Warn( p_aout, "GetProcAddress FAILED" );
 690         goto error;
 691     }
 692
 693     /* Get DirectSoundEnumerate */
 694     OurDirectSoundEnumerate = (void *)
 695        GetProcAddress( p_aout->output.p_sys->hdsound_dll,
 696                        "DirectSoundEnumerateA" );
 697     if( OurDirectSoundEnumerate )
 698     {
 699         p_aout->output.p_sys->psz_device = config_GetPsz(p_aout, "directx-audio-device-name");
 700         /* Attempt enumeration */
 701         if( FAILED( OurDirectSoundEnumerate( CallBackDirectSoundEnum,
 702                                              p_aout ) ) )
 703         {
 704             msg_Dbg( p_aout, "enumeration of DirectSound devices failed" );
 705         }
 706     }
 707
 708     /* Create the direct sound object */
 709     if FAILED( OurDirectSoundCreate( p_aout->output.p_sys->p_device_guid,
 710                                      &p_aout->output.p_sys->p_dsobject,
 711                                      NULL ) )
 712     {
 713         msg_Warn( p_aout, "cannot create a direct sound device" );
 714         goto error;
 715     }
 716
 717     /* Set DirectSound Cooperative level, ie what control we want over Windows
 718      * sound device. In our case, DSSCL_EXCLUSIVE means that we can modify the
 719      * settings of the primary buffer, but also that only the sound of our
 720      * application will be hearable when it will have the focus.
 721      * !!! (this is not really working as intended yet because to set the
 722      * cooperative level you need the window handle of your application, and
 723      * I don't know of any easy way to get it. Especially since we might play
 724      * sound without any video, and so what window handle should we use ???
 725      * The hack for now is to use the Desktop window handle - it seems to be
 726      * working */
 727     if( IDirectSound_SetCooperativeLevel( p_aout->output.p_sys->p_dsobject,
 728                                           GetDesktopWindow(),
 729                                           DSSCL_EXCLUSIVE) )
 730     {
 731         msg_Warn( p_aout, "cannot set direct sound cooperative level" );
 732     }
 733
 734     return VLC_SUCCESS;
 735
 736  error:
 737     p_aout->output.p_sys->p_dsobject = NULL;
 738     if( p_aout->output.p_sys->hdsound_dll )
 739     {
 740         FreeLibrary( p_aout->output.p_sys->hdsound_dll );
 741         p_aout->output.p_sys->hdsound_dll = NULL;
 742     }
 743     return VLC_EGENERIC;
 744
 745 }
 746
 747 /*****************************************************************************
 748  * CreateDSBuffer: Creates a direct sound buffer of the required format.
 749  *****************************************************************************
 750  * This function creates the buffer we'll use to play audio.
 751  * In DirectSound there are two kinds of buffers:
 752  * - the primary buffer: which is the actual buffer that the soundcard plays
 753  * - the secondary buffer(s): these buffers are the one actually used by
 754  *    applications and DirectSound takes care of mixing them into the primary.
 755  *
 756  * Once you create a secondary buffer, you cannot change its format anymore so
 757  * you have to release the current one and create another.
 758  *****************************************************************************/
 759 static int CreateDSBuffer( aout_instance_t *p_aout, int i_format,
 760                            int i_channels, int i_nb_channels, int i_rate,
 761                            int i_bytes_per_frame, bool b_probe )
 762 {
 763     WAVEFORMATEXTENSIBLE waveformat;
 764     DSBUFFERDESC         dsbdesc;
 765     unsigned int         i;
 766
 767     /* First set the sound buffer format */
 768     waveformat.dwChannelMask = 0;
 769     for( i = 0; i < sizeof(pi_channels_src)/sizeof(uint32_t); i++ )
 770     {
 771         if( i_channels & pi_channels_src[i] )
 772             waveformat.dwChannelMask |= pi_channels_in[i];
 773     }
 774
 775     switch( i_format )
 776     {
 777     case VLC_CODEC_SPDIFL:
 778         i_nb_channels = 2;
 779         /* To prevent channel re-ordering */
 780         waveformat.dwChannelMask = SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT;
 781         waveformat.Format.wBitsPerSample = 16;
 782         waveformat.Samples.wValidBitsPerSample =
 783             waveformat.Format.wBitsPerSample;
 784         waveformat.Format.wFormatTag = WAVE_FORMAT_DOLBY_AC3_SPDIF;
 785         waveformat.SubFormat = _KSDATAFORMAT_SUBTYPE_DOLBY_AC3_SPDIF;
 786         break;
 787
 788     case VLC_CODEC_FL32:
 789         waveformat.Format.wBitsPerSample = sizeof(float) * 8;
 790         waveformat.Samples.wValidBitsPerSample =
 791             waveformat.Format.wBitsPerSample;
 792         waveformat.Format.wFormatTag = WAVE_FORMAT_IEEE_FLOAT;
 793         waveformat.SubFormat = _KSDATAFORMAT_SUBTYPE_IEEE_FLOAT;
 794         break;
 795
 796     case VLC_CODEC_S16L:
 797         waveformat.Format.wBitsPerSample = 16;
 798         waveformat.Samples.wValidBitsPerSample =
 799             waveformat.Format.wBitsPerSample;
 800         waveformat.Format.wFormatTag = WAVE_FORMAT_PCM;
 801         waveformat.SubFormat = _KSDATAFORMAT_SUBTYPE_PCM;
 802         break;
 803     }
 804
 805     waveformat.Format.nChannels = i_nb_channels;
 806     waveformat.Format.nSamplesPerSec = i_rate;
 807     waveformat.Format.nBlockAlign =
 808         waveformat.Format.wBitsPerSample / 8 * i_nb_channels;
 809     waveformat.Format.nAvgBytesPerSec =
 810         waveformat.Format.nSamplesPerSec * waveformat.Format.nBlockAlign;
 811
 812     p_aout->output.p_sys->i_bits_per_sample = waveformat.Format.wBitsPerSample;
 813     p_aout->output.p_sys->i_channels = i_nb_channels;
 814
 815     /* Then fill in the direct sound descriptor */
 816     memset(&dsbdesc, 0, sizeof(DSBUFFERDESC));
 817     dsbdesc.dwSize = sizeof(DSBUFFERDESC);
 818     dsbdesc.dwFlags = DSBCAPS_GETCURRENTPOSITION2/* Better position accuracy */
 819                     | DSBCAPS_GLOBALFOCUS;      /* Allows background playing */
 820
 821     /* Only use the new WAVE_FORMAT_EXTENSIBLE format for multichannel audio */
 822     if( i_nb_channels <= 2 )
 823     {
 824         waveformat.Format.cbSize = 0;
 825     }
 826     else
 827     {
 828         waveformat.Format.wFormatTag = WAVE_FORMAT_EXTENSIBLE;
 829         waveformat.Format.cbSize =
 830             sizeof(WAVEFORMATEXTENSIBLE) - sizeof(WAVEFORMATEX);
 831
 832         /* Needed for 5.1 on emu101k */
 833         dsbdesc.dwFlags |= DSBCAPS_LOCHARDWARE;
 834     }
 835
 836     dsbdesc.dwBufferBytes = FRAMES_NUM * i_bytes_per_frame;   /* buffer size */
 837     dsbdesc.lpwfxFormat = (WAVEFORMATEX *)&waveformat;
 838
 839     if FAILED( IDirectSound_CreateSoundBuffer(
 840                    p_aout->output.p_sys->p_dsobject, &dsbdesc,
 841                    &p_aout->output.p_sys->p_dsbuffer, NULL) )
 842     {
 843         if( dsbdesc.dwFlags & DSBCAPS_LOCHARDWARE )
 844         {
 845             /* Try without DSBCAPS_LOCHARDWARE */
 846             dsbdesc.dwFlags &= ~DSBCAPS_LOCHARDWARE;
 847             if FAILED( IDirectSound_CreateSoundBuffer(
 848                    p_aout->output.p_sys->p_dsobject, &dsbdesc,
 849                    &p_aout->output.p_sys->p_dsbuffer, NULL) )
 850             {
 851                 return VLC_EGENERIC;
 852             }
 853             if( !b_probe )
 854                 msg_Dbg( p_aout, "couldn't use hardware sound buffer" );
 855         }
 856         else
 857         {
 858             return VLC_EGENERIC;
 859         }
 860     }
 861
 862     /* Stop here if we were just probing */
 863     if( b_probe )
 864     {
 865         IDirectSoundBuffer_Release( p_aout->output.p_sys->p_dsbuffer );
 866         p_aout->output.p_sys->p_dsbuffer = NULL;
 867         return VLC_SUCCESS;
 868     }
 869
 870     p_aout->output.p_sys->i_frame_size = i_bytes_per_frame;
 871     p_aout->output.p_sys->i_channel_mask = waveformat.dwChannelMask;
 872     p_aout->output.p_sys->b_chan_reorder =
 873         aout_CheckChannelReorder( pi_channels_in, pi_channels_out,
 874                                   waveformat.dwChannelMask, i_nb_channels,
 875                                   p_aout->output.p_sys->pi_chan_table );
 876
 877     if( p_aout->output.p_sys->b_chan_reorder )
 878     {
 879         msg_Dbg( p_aout, "channel reordering needed" );
 880     }
 881
 882     return VLC_SUCCESS;
 883 }
 884
 885 /*****************************************************************************
 886  * CreateDSBufferPCM: creates a PCM direct sound buffer.
 887  *****************************************************************************
 888  * We first try to create a WAVE_FORMAT_IEEE_FLOAT buffer if supported by
 889  * the hardware, otherwise we create a WAVE_FORMAT_PCM buffer.
 890  ****************************************************************************/
 891 static int CreateDSBufferPCM( aout_instance_t *p_aout, vlc_fourcc_t *i_format,
 892                               int i_channels, int i_nb_channels, int i_rate,
 893                               bool b_probe )
 894 {
 895     /* Float32 audio samples are not supported for 5.1 output on the emu101k */
 896     if( !var_GetBool( p_aout, "directx-audio-float32" ) ||
 897         i_nb_channels > 2 ||
 898         CreateDSBuffer( p_aout, VLC_CODEC_FL32,
 899                         i_channels, i_nb_channels, i_rate,
 900                         FRAME_SIZE * 4 * i_nb_channels, b_probe )
 901         != VLC_SUCCESS )
 902     {
 903         if ( CreateDSBuffer( p_aout, VLC_CODEC_S16L,
 904                              i_channels, i_nb_channels, i_rate,
 905                              FRAME_SIZE * 2 * i_nb_channels, b_probe )
 906              != VLC_SUCCESS )
 907         {
 908             return VLC_EGENERIC;
 909         }
 910         else
 911         {
 912             *i_format = VLC_CODEC_S16L;
 913             return VLC_SUCCESS;
 914         }
 915     }
 916     else
 917     {
 918         *i_format = VLC_CODEC_FL32;
 919         return VLC_SUCCESS;
 920     }
 921 }
 922
 923 /*****************************************************************************
 924  * DestroyDSBuffer
 925  *****************************************************************************
 926  * This function destroys the secondary buffer.
 927  *****************************************************************************/
 928 static void DestroyDSBuffer( aout_instance_t *p_aout )
 929 {
 930     if( p_aout->output.p_sys->p_dsbuffer )
 931     {
 932         IDirectSoundBuffer_Release( p_aout->output.p_sys->p_dsbuffer );
 933         p_aout->output.p_sys->p_dsbuffer = NULL;
 934     }
 935 }
 936
 937 /*****************************************************************************
 938  * FillBuffer: Fill in one of the direct sound frame buffers.
 939  *****************************************************************************
 940  * Returns VLC_SUCCESS on success.
 941  *****************************************************************************/
 942 static int FillBuffer( aout_instance_t *p_aout, int i_frame,
 943                        aout_buffer_t *p_buffer )
 944 {
 945     notification_thread_t *p_notif = p_aout->output.p_sys->p_notif;
 946     aout_sys_t *p_sys = p_aout->output.p_sys;
 947     void *p_write_position, *p_wrap_around;
 948     unsigned long l_bytes1, l_bytes2;
 949     HRESULT dsresult;
 950
 951     /* Before copying anything, we have to lock the buffer */
 952     dsresult = IDirectSoundBuffer_Lock(
 953                 p_sys->p_dsbuffer,                              /* DS buffer */
 954                 i_frame * p_notif->i_frame_size,             /* Start offset */
 955                 p_notif->i_frame_size,                    /* Number of bytes */
 956                 &p_write_position,                  /* Address of lock start */
 957                 &l_bytes1,       /* Count of bytes locked before wrap around */
 958                 &p_wrap_around,            /* Buffer adress (if wrap around) */
 959                 &l_bytes2,               /* Count of bytes after wrap around */
 960                 0 );                                                /* Flags */
 961     if( dsresult == DSERR_BUFFERLOST )
 962     {
 963         IDirectSoundBuffer_Restore( p_sys->p_dsbuffer );
 964         dsresult = IDirectSoundBuffer_Lock(
 965                                p_sys->p_dsbuffer,
 966                                i_frame * p_notif->i_frame_size,
 967                                p_notif->i_frame_size,
 968                                &p_write_position,
 969                                &l_bytes1,
 970                                &p_wrap_around,
 971                                &l_bytes2,
 972                                0 );
 973     }
 974     if( dsresult != DS_OK )
 975     {
 976         msg_Warn( p_notif, "cannot lock buffer" );
 977         if( p_buffer ) aout_BufferFree( p_buffer );
 978         return VLC_EGENERIC;
 979     }
 980
 981     if( p_buffer == NULL )
 982     {
 983         memset( p_write_position, 0, l_bytes1 );
 984     }
 985     else
 986     {
 987         if( p_sys->b_chan_reorder )
 988         {
 989             /* Do the channel reordering here */
 990             aout_ChannelReorder( p_buffer->p_buffer, p_buffer->i_buffer,
 991                                  p_sys->i_channels, p_sys->pi_chan_table,
 992                                  p_sys->i_bits_per_sample );
 993         }
 994
 995         vlc_memcpy( p_write_position, p_buffer->p_buffer, l_bytes1 );
 996         aout_BufferFree( p_buffer );
 997     }
 998
 999     /* Now the data has been copied, unlock the buffer */
1000     IDirectSoundBuffer_Unlock( p_sys->p_dsbuffer, p_write_position, l_bytes1,
1001                                p_wrap_around, l_bytes2 );
1002
1003     p_notif->i_write_slot = (i_frame + 1) % FRAMES_NUM;
1004     return VLC_SUCCESS;
1005 }
1006
1007 /*****************************************************************************
1008  * DirectSoundThread: this thread will capture play notification events.
1009  *****************************************************************************
1010  * We use this thread to emulate a callback mechanism. The thread probes for
1011  * event notification and fills up the DS secondary buffer when needed.
1012  *****************************************************************************/
1013 static void* DirectSoundThread( vlc_object_t *p_this )
1014 {
1015     notification_thread_t *p_notif = (notification_thread_t*)p_this;
1016     aout_instance_t *p_aout = p_notif->p_aout;
1017     mtime_t last_time;
1018     int canc = vlc_savecancel ();
1019
1020     /* We don't want any resampling when using S/PDIF output */
1021     bool b_sleek = (p_aout->output.output.i_format == VLC_CODEC_SPDIFL);
1022
1023     msg_Dbg( p_notif, "DirectSoundThread ready" );
1024
1025     /* Wait here until Play() is called */
1026     WaitForSingleObject( p_notif->event, INFINITE );
1027
1028     if( vlc_object_alive (p_notif) )
1029     {
1030         HRESULT dsresult;
1031         mwait( p_notif->start_date - AOUT_PTS_TOLERANCE / 2 );
1032
1033         /* start playing the buffer */
1034         dsresult = IDirectSoundBuffer_Play( p_aout->output.p_sys->p_dsbuffer,
1035                                         0,                         /* Unused */
1036                                         0,                         /* Unused */
1037                                         DSBPLAY_LOOPING );          /* Flags */
1038         if( dsresult == DSERR_BUFFERLOST )
1039         {
1040             IDirectSoundBuffer_Restore( p_aout->output.p_sys->p_dsbuffer );
1041             dsresult = IDirectSoundBuffer_Play(
1042                                             p_aout->output.p_sys->p_dsbuffer,
1043                                             0,                     /* Unused */
1044                                             0,                     /* Unused */
1045                                             DSBPLAY_LOOPING );      /* Flags */
1046         }
1047         if( dsresult != DS_OK )
1048         {
1049             msg_Err( p_aout, "cannot start playing buffer" );
1050         }
1051     }
1052     last_time = mdate();
1053
1054     while( vlc_object_alive (p_notif) )
1055     {
1056         DWORD l_read;
1057         int l_queued = 0, l_free_slots;
1058         unsigned i_frame_siz = p_aout->output.i_nb_samples;
1059         mtime_t mtime = mdate();
1060         int i;
1061
1062         /*
1063          * Fill in as much audio data as we can in our circular buffer
1064          */
1065
1066         /* Find out current play position */
1067         if FAILED( IDirectSoundBuffer_GetCurrentPosition(
1068                    p_aout->output.p_sys->p_dsbuffer, &l_read, NULL ) )
1069         {
1070             msg_Err( p_aout, "GetCurrentPosition() failed!" );
1071             l_read = 0;
1072         }
1073
1074         /* Detect underruns */
1075         if( l_queued && mtime - last_time >
1076             INT64_C(1000000) * l_queued / p_aout->output.output.i_rate )
1077         {
1078             msg_Dbg( p_aout, "detected underrun!" );
1079         }
1080         last_time = mtime;
1081
1082         /* Try to fill in as many frame buffers as possible */
1083         l_read /= (p_aout->output.output.i_bytes_per_frame /
1084             p_aout->output.output.i_frame_length);
1085         l_queued = p_notif->i_write_slot * i_frame_siz - l_read;
1086         if( l_queued < 0 ) l_queued += (i_frame_siz * FRAMES_NUM);
1087         l_free_slots = (FRAMES_NUM * i_frame_siz - l_queued) / i_frame_siz;
1088
1089         for( i = 0; i < l_free_slots; i++ )
1090         {
1091             aout_buffer_t *p_buffer = aout_OutputNextBuffer( p_aout,
1092                 mtime + INT64_C(1000000) * (i * i_frame_siz + l_queued) /
1093                 p_aout->output.output.i_rate, b_sleek );
1094
1095             /* If there is no audio data available and we have some buffered
1096              * already, then just wait for the next time */
1097             if( !p_buffer && (i || l_queued / i_frame_siz) ) break;
1098
1099             if( FillBuffer( p_aout, p_notif->i_write_slot % FRAMES_NUM,
1100                             p_buffer ) != VLC_SUCCESS ) break;
1101         }
1102
1103         /* Sleep a reasonable amount of time */
1104         l_queued += (i * i_frame_siz);
1105         msleep( INT64_C(1000000) * l_queued / p_aout->output.output.i_rate / 2 );
1106     }
1107
1108     /* make sure the buffer isn't playing */
1109     IDirectSoundBuffer_Stop( p_aout->output.p_sys->p_dsbuffer );
1110
1111     /* free the event */
1112     CloseHandle( p_notif->event );
1113
1114     vlc_restorecancel (canc);
1115     msg_Dbg( p_notif, "DirectSoundThread exiting" );
1116     return NULL;
1117 }
1118
1119 /*****************************************************************************
1120  * CallBackConfigNBEnum: callback to get the number of available devices
1121  *****************************************************************************/
1122 static int CALLBACK CallBackConfigNBEnum( LPGUID p_guid, LPCSTR psz_desc,
1123                                              LPCSTR psz_mod, LPVOID p_nb )
1124 {
1125     VLC_UNUSED( psz_mod );
1126     VLC_UNUSED( psz_desc );
1127     VLC_UNUSED( p_guid );
1128     int * a = (int *)p_nb;
1129     *a = *a +1;
1130     return 1;
1131 }
1132
1133 /*****************************************************************************
1134  * CallBackConfigEnum: callback to add available devices to the preferences list
1135  *****************************************************************************/
1136 static int CALLBACK CallBackConfigEnum( LPGUID p_guid, LPCSTR psz_desc,
1137                                              LPCSTR psz_mod, LPVOID _p_item )
1138 {
1139     VLC_UNUSED( psz_mod );
1140     VLC_UNUSED( p_guid );
1141
1142     module_config_t *p_item = (module_config_t *) _p_item;
1143
1144     p_item->ppsz_list[p_item->i_list] = FromLocaleDup(psz_desc);
1145     p_item->ppsz_list_text[p_item->i_list] = FromLocaleDup(psz_desc);
1146     p_item->i_list = p_item->i_list +1;
1147     return 1;
1148 }
1149
1150 /*****************************************************************************
1151  * ReloadDirectXDevices: store the list of devices in preferences
1152  *****************************************************************************/
1153 static int ReloadDirectXDevices( vlc_object_t *p_this, char const *psz_name,
1154                                  vlc_value_t newval, vlc_value_t oldval, void *data )
1155 {
1156     VLC_UNUSED( newval ); VLC_UNUSED( oldval ); VLC_UNUSED( data );
1157     module_config_t *p_item = config_FindConfig( p_this, psz_name );
1158     if( !p_item ) return VLC_SUCCESS;
1159
1160     /* Clear-up the current list */
1161     if( p_item->i_list )
1162     {
1163         int i;
1164         for( i = 0; i < p_item->i_list; i++ )
1165         {
1166             free((char *)(p_item->ppsz_list[i]) );
1167             free((char *)(p_item->ppsz_list_text[i]) );
1168         }
1169     }
1170
1171     HRESULT (WINAPI *OurDirectSoundEnumerate)(LPDSENUMCALLBACK, LPVOID);
1172
1173     HANDLE hdsound_dll = LoadLibrary("DSOUND.DLL");
1174     if( hdsound_dll == NULL )
1175     {
1176         msg_Warn( p_this, "cannot open DSOUND.DLL" );
1177     }
1178
1179     /* Get DirectSoundEnumerate */
1180     OurDirectSoundEnumerate = (void *)
1181        GetProcAddress( hdsound_dll,
1182                        "DirectSoundEnumerateA" );
1183     int nb_devices = 0;
1184     OurDirectSoundEnumerate(CallBackConfigNBEnum, &nb_devices);
1185     msg_Dbg(p_this,"found %d devices", nb_devices);
1186
1187     p_item->ppsz_list = xrealloc( p_item->ppsz_list,
1188                           nb_devices * sizeof(char *) );
1189     p_item->ppsz_list_text = xrealloc( p_item->ppsz_list_text,
1190                           nb_devices * sizeof(char *) );
1191
1192     p_item->i_list = 0;
1193     OurDirectSoundEnumerate(CallBackConfigEnum, p_item);
1194
1195     FreeLibrary(hdsound_dll);
1196
1197     /* Signal change to the interface */
1198     p_item->b_dirty = true;
1199
1200     return VLC_SUCCESS;
1201 }
1202