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

   1 /*****************************************************************************
   2  * directx.c: Windows DirectX audio output method
   3  *****************************************************************************
   4  * Copyright (C) 2001-2009 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Gildas Bazin <gbazin@videolan.org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software Foundation, Inc.,
  21  * 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27
  28 #ifdef HAVE_CONFIG_H
  29 # include "config.h"
  30 #endif
  31
  32 #include <vlc_common.h>
  33 #include <vlc_plugin.h>
  34 #include <vlc_aout.h>
  35 #include <vlc_charset.h>
  36 #include <vlc_atomic.h>
  37
  38 #include "windows_audio_common.h"
  39
  40 #define FRAME_SIZE ((int)p_aout->output.output.i_rate/20) /* Size in samples */
  41
  42 /*****************************************************************************
  43  * notification_thread_t: DirectX event thread
  44  *****************************************************************************/
  45 typedef struct notification_thread_t
  46 {
  47     aout_instance_t *p_aout;
  48     int i_frame_size;                          /* size in bytes of one frame */
  49     int i_write_slot;       /* current write position in our circular buffer */
  50
  51     mtime_t start_date;
  52     HANDLE event;
  53
  54     vlc_thread_t thread;
  55     vlc_atomic_t abort;
  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( void * );
 106 static int  FillBuffer        ( aout_instance_t *, int, aout_buffer_t * );
 107
 108 static int ReloadDirectXDevices( vlc_object_t *, char const *,
 109                                 vlc_value_t, vlc_value_t, void * );
 110
 111 /* Speaker setup override options list */
 112 static const char *const speaker_list[] = { "Windows default", "Mono", "Stereo",
 113                                             "Quad", "5.1", "7.1" };
 114 static const char *const ppsz_adev[] = {"default",  };
 115 static const char *const ppsz_adev_text[] = {"default", };
 116
 117 /*****************************************************************************
 118  * Module descriptor
 119  *****************************************************************************/
 120 #define DEVICE_TEXT N_("Output device")
 121 #define DEVICE_LONGTEXT N_("Select your audio output device")
 122
 123 #define SPEAKER_TEXT N_("Speaker configuration")
 124 #define SPEAKER_LONGTEXT N_("Select speaker configuration you want to use. " \
 125     "This option doesn't upmix! So NO e.g. Stereo -> 5.1 conversion." )
 126
 127 vlc_module_begin ()
 128     set_description( N_("DirectX audio output") )
 129     set_shortname( "DirectX" )
 130     set_capability( "audio output", 100 )
 131     set_category( CAT_AUDIO )
 132     set_subcategory( SUBCAT_AUDIO_AOUT )
 133     add_shortcut( "directx", "directsound" )
 134
 135     add_string( "directx-audio-device-name", "default",
 136              DEVICE_TEXT, DEVICE_LONGTEXT, false )
 137         add_deprecated_alias( "directx-audio-device" ) /* Since 1.1.0 */
 138         change_string_list( ppsz_adev, ppsz_adev_text, ReloadDirectXDevices )
 139         change_action_add( ReloadDirectXDevices, N_("Refresh list") )
 140     add_bool( "directx-audio-float32", false, FLOAT_TEXT,
 141               FLOAT_LONGTEXT, true )
 142     add_string( "directx-audio-speaker", "Windows default",
 143                  SPEAKER_TEXT, SPEAKER_LONGTEXT, true )
 144         change_string_list( speaker_list, 0, 0 )
 145
 146     set_callbacks( OpenAudio, CloseAudio )
 147 vlc_module_end ()
 148
 149 /*****************************************************************************
 150  * OpenAudio: open the audio device
 151  *****************************************************************************
 152  * This function opens and setups Direct Sound.
 153  *****************************************************************************/
 154 static int OpenAudio( vlc_object_t *p_this )
 155 {
 156     aout_instance_t * p_aout = (aout_instance_t *)p_this;
 157     vlc_value_t val;
 158     char * psz_speaker;
 159     int i = 0;
 160
 161     const char * const * ppsz_compare = speaker_list;
 162
 163     msg_Dbg( p_aout, "Opening DirectSound Audio Output" );
 164
 165    /* Allocate structure */
 166     p_aout->output.p_sys = malloc( sizeof( aout_sys_t ) );
 167     if( p_aout->output.p_sys == NULL )
 168         return VLC_ENOMEM;
 169
 170     /* Initialize some variables */
 171     p_aout->output.p_sys->p_dsobject = NULL;
 172     p_aout->output.p_sys->p_dsbuffer = NULL;
 173     p_aout->output.p_sys->p_notif = NULL;
 174     p_aout->output.p_sys->b_playing = 0;
 175
 176     p_aout->output.pf_play = Play;
 177     aout_VolumeSoftInit( p_aout );
 178
 179     /* Retrieve config values */
 180     var_Create( p_aout, "directx-audio-float32",
 181                 VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 182     psz_speaker = var_CreateGetString( p_aout, "directx-audio-speaker" );
 183
 184     while ( *ppsz_compare != NULL )
 185     {
 186         if ( !strncmp( *ppsz_compare, psz_speaker, strlen(*ppsz_compare) ) )
 187         {
 188             break;
 189         }
 190         ppsz_compare++; i++;
 191     }
 192
 193     if ( *ppsz_compare == NULL )
 194     {
 195         msg_Err( p_aout, "(%s) isn't valid speaker setup option", 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 = calloc( 1, sizeof( *p_aout->output.p_sys->p_notif ) );
 306     p_aout->output.p_sys->p_notif->p_aout = p_aout;
 307
 308     vlc_atomic_set(&p_aout->output.p_sys->p_notif->abort, 0);
 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_clone( &p_aout->output.p_sys->p_notif->thread,
 316                    DirectSoundThread, p_aout->output.p_sys->p_notif,
 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         free( p_aout->output.p_sys->p_notif );
 322         p_aout->output.p_sys->p_notif = NULL;
 323         goto error;
 324     }
 325
 326     return VLC_SUCCESS;
 327
 328  error:
 329     CloseAudio( VLC_OBJECT(p_aout) );
 330     return VLC_EGENERIC;
 331 }
 332
 333 /*****************************************************************************
 334  * Probe: probe the audio device for available formats and channels
 335  *****************************************************************************/
 336 static void Probe( aout_instance_t * p_aout )
 337 {
 338     vlc_value_t val, text;
 339     vlc_fourcc_t i_format;
 340     unsigned int i_physical_channels;
 341     DWORD ui_speaker_config;
 342     bool is_default_output_set = false;
 343
 344     var_Create( p_aout, "audio-device", VLC_VAR_INTEGER | VLC_VAR_HASCHOICE );
 345     text.psz_string = _("Audio Device");
 346     var_Change( p_aout, "audio-device", VLC_VAR_SETTEXT, &text, NULL );
 347
 348     /* Test for 5.1 support */
 349     i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
 350                           AOUT_CHAN_CENTER | AOUT_CHAN_REARLEFT |
 351                           AOUT_CHAN_REARRIGHT | AOUT_CHAN_LFE;
 352     if( p_aout->output.output.i_physical_channels == i_physical_channels )
 353     {
 354         if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 6,
 355                                p_aout->output.output.i_rate, true )
 356             == VLC_SUCCESS )
 357         {
 358             val.i_int = AOUT_VAR_5_1;
 359             text.psz_string = (char*) "5.1";
 360             var_Change( p_aout, "audio-device",
 361                         VLC_VAR_ADDCHOICE, &val, &text );
 362             var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
 363             is_default_output_set = true;
 364             msg_Dbg( p_aout, "device supports 5.1 channels" );
 365         }
 366     }
 367
 368     /* Test for 7.1 support */
 369     i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
 370                              AOUT_CHAN_CENTER | AOUT_CHAN_REARLEFT |
 371                              AOUT_CHAN_MIDDLELEFT | AOUT_CHAN_MIDDLERIGHT |
 372                              AOUT_CHAN_REARRIGHT | AOUT_CHAN_LFE;
 373     if( p_aout->output.output.i_physical_channels == i_physical_channels )
 374     {
 375         if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 8,
 376                                   p_aout->output.output.i_rate, true )
 377             == VLC_SUCCESS )
 378         {
 379             val.i_int = AOUT_VAR_7_1;
 380             text.psz_string = (char*) "7.1";
 381             var_Change( p_aout, "audio-device",
 382                         VLC_VAR_ADDCHOICE, &val, &text );
 383             var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
 384             is_default_output_set = true;
 385             msg_Dbg( p_aout, "device supports 7.1 channels" );
 386         }
 387     }
 388
 389     /* Test for 3 Front 2 Rear support */
 390     i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
 391                           AOUT_CHAN_CENTER | AOUT_CHAN_REARLEFT |
 392                           AOUT_CHAN_REARRIGHT;
 393     if( p_aout->output.output.i_physical_channels == i_physical_channels )
 394     {
 395         if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 5,
 396                                p_aout->output.output.i_rate, true )
 397             == VLC_SUCCESS )
 398         {
 399             val.i_int = AOUT_VAR_3F2R;
 400             text.psz_string = _("3 Front 2 Rear");
 401             var_Change( p_aout, "audio-device",
 402                         VLC_VAR_ADDCHOICE, &val, &text );
 403             if(!is_default_output_set)
 404             {
 405                 var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
 406                 is_default_output_set = true;
 407             }
 408             msg_Dbg( p_aout, "device supports 5 channels" );
 409         }
 410     }
 411
 412     /* Test for 2 Front 2 Rear support */
 413     i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
 414                           AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
 415     if( ( p_aout->output.output.i_physical_channels & i_physical_channels )
 416         == i_physical_channels )
 417     {
 418         if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 4,
 419                                p_aout->output.output.i_rate, true )
 420             == VLC_SUCCESS )
 421         {
 422             val.i_int = AOUT_VAR_2F2R;
 423             text.psz_string = _("2 Front 2 Rear");
 424             var_Change( p_aout, "audio-device",
 425                         VLC_VAR_ADDCHOICE, &val, &text );
 426             if(!is_default_output_set)
 427             {
 428                 var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
 429                 is_default_output_set = true;
 430             }
 431             msg_Dbg( p_aout, "device supports 4 channels" );
 432         }
 433     }
 434
 435     /* Test for stereo support */
 436     i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
 437     if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 2,
 438                            p_aout->output.output.i_rate, true )
 439         == VLC_SUCCESS )
 440     {
 441         val.i_int = AOUT_VAR_STEREO;
 442         text.psz_string = _("Stereo");
 443         var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
 444         if(!is_default_output_set)
 445         {
 446             var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
 447             is_default_output_set = true;
 448             msg_Dbg( p_aout, "device supports 2 channels (DEFAULT!)" );
 449         }
 450         else msg_Dbg( p_aout, "device supports 2 channels" );
 451     }
 452
 453     /* Test for mono support */
 454     i_physical_channels = AOUT_CHAN_CENTER;
 455     if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 1,
 456                            p_aout->output.output.i_rate, true )
 457         == VLC_SUCCESS )
 458     {
 459         val.i_int = AOUT_VAR_MONO;
 460         text.psz_string = _("Mono");
 461         var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
 462         msg_Dbg( p_aout, "device supports 1 channel" );
 463     }
 464
 465     /* Check the speaker configuration to determine which channel config should
 466      * be the default */
 467     if FAILED( IDirectSound_GetSpeakerConfig( p_aout->output.p_sys->p_dsobject,
 468                                               &ui_speaker_config ) )
 469     {
 470         ui_speaker_config = DSSPEAKER_STEREO;
 471         msg_Dbg( p_aout, "GetSpeakerConfig failed" );
 472     }
 473     switch( DSSPEAKER_CONFIG(ui_speaker_config) )
 474     {
 475     case DSSPEAKER_7POINT1:
 476         msg_Dbg( p_aout, "Windows says your SpeakerConfig is 7.1" );
 477         val.i_int = AOUT_VAR_7_1;
 478         break;
 479     case DSSPEAKER_5POINT1:
 480         msg_Dbg( p_aout, "Windows says your SpeakerConfig is 5.1" );
 481         val.i_int = AOUT_VAR_5_1;
 482         break;
 483     case DSSPEAKER_QUAD:
 484         msg_Dbg( p_aout, "Windows says your SpeakerConfig is Quad" );
 485         val.i_int = AOUT_VAR_2F2R;
 486         break;
 487 #if 0 /* Lots of people just get their settings wrong and complain that
 488        * this is a problem with VLC so just don't ever set mono by default. */
 489     case DSSPEAKER_MONO:
 490         val.i_int = AOUT_VAR_MONO;
 491         break;
 492 #endif
 493     case DSSPEAKER_SURROUND:
 494         msg_Dbg( p_aout, "Windows says your SpeakerConfig is surround" );
 495     case DSSPEAKER_STEREO:
 496         msg_Dbg( p_aout, "Windows says your SpeakerConfig is stereo" );
 497     default:
 498         /* If nothing else is found, choose stereo output */
 499         val.i_int = AOUT_VAR_STEREO;
 500         break;
 501     }
 502
 503     /* Check if we want to override speaker config */
 504     switch( p_aout->output.p_sys->i_speaker_setup )
 505     {
 506     case 0: /* Default value aka Windows default speaker setup */
 507         break;
 508     case 1: /* Mono */
 509         msg_Dbg( p_aout, "SpeakerConfig is forced to Mono" );
 510         val.i_int = AOUT_VAR_MONO;
 511         break;
 512     case 2: /* Stereo */
 513         msg_Dbg( p_aout, "SpeakerConfig is forced to Stereo" );
 514         val.i_int = AOUT_VAR_STEREO;
 515         break;
 516     case 3: /* Quad */
 517         msg_Dbg( p_aout, "SpeakerConfig is forced to Quad" );
 518         val.i_int = AOUT_VAR_2F2R;
 519         break;
 520     case 4: /* 5.1 */
 521         msg_Dbg( p_aout, "SpeakerConfig is forced to 5.1" );
 522         val.i_int = AOUT_VAR_5_1;
 523         break;
 524     case 5: /* 7.1 */
 525         msg_Dbg( p_aout, "SpeakerConfig is forced to 7.1" );
 526         val.i_int = AOUT_VAR_7_1;
 527         break;
 528     default:
 529         msg_Dbg( p_aout, "SpeakerConfig is forced to non-existing value" );
 530         break;
 531     }
 532
 533     var_Set( p_aout, "audio-device", val );
 534
 535     /* Test for SPDIF support */
 536     if ( AOUT_FMT_NON_LINEAR( &p_aout->output.output ) )
 537     {
 538         if( CreateDSBuffer( p_aout, VLC_CODEC_SPDIFL,
 539                             p_aout->output.output.i_physical_channels,
 540                             aout_FormatNbChannels( &p_aout->output.output ),
 541                             p_aout->output.output.i_rate,
 542                             AOUT_SPDIF_SIZE, true )
 543             == VLC_SUCCESS )
 544         {
 545             msg_Dbg( p_aout, "device supports A/52 over S/PDIF" );
 546             val.i_int = AOUT_VAR_SPDIF;
 547             text.psz_string = _("A/52 over S/PDIF");
 548             var_Change( p_aout, "audio-device",
 549                         VLC_VAR_ADDCHOICE, &val, &text );
 550             if( var_InheritBool( p_aout, "spdif" ) )
 551                 var_Set( p_aout, "audio-device", val );
 552         }
 553     }
 554
 555     var_Change( p_aout, "audio-device", VLC_VAR_CHOICESCOUNT, &val, NULL );
 556     if( val.i_int <= 0 )
 557     {
 558         /* Probe() has failed. */
 559         var_Destroy( p_aout, "audio-device" );
 560         return;
 561     }
 562
 563     var_AddCallback( p_aout, "audio-device", aout_ChannelsRestart, NULL );
 564     var_TriggerCallback( p_aout, "intf-change" );
 565 }
 566
 567 /*****************************************************************************
 568  * Play: we'll start playing the directsound buffer here because at least here
 569  *       we know the first buffer has been put in the aout fifo and we also
 570  *       know its date.
 571  *****************************************************************************/
 572 static void Play( aout_instance_t *p_aout )
 573 {
 574     if( !p_aout->output.p_sys->b_playing )
 575     {
 576         aout_buffer_t *p_buffer;
 577
 578         p_aout->output.p_sys->b_playing = 1;
 579
 580         /* get the playing date of the first aout buffer */
 581         p_aout->output.p_sys->p_notif->start_date =
 582             aout_FifoFirstDate( &p_aout->output.fifo );
 583
 584         /* fill in the first samples */
 585         for( int i = 0; i < FRAMES_NUM; i++ )
 586         {
 587             p_buffer = aout_FifoPop( &p_aout->output.fifo );
 588             if( !p_buffer ) break;
 589             FillBuffer( p_aout, i, p_buffer );
 590         }
 591
 592         /* wake up the audio output thread */
 593         SetEvent( p_aout->output.p_sys->p_notif->event );
 594     }
 595 }
 596
 597 /*****************************************************************************
 598  * CloseAudio: close the audio device
 599  *****************************************************************************/
 600 static void CloseAudio( vlc_object_t *p_this )
 601 {
 602     aout_instance_t * p_aout = (aout_instance_t *)p_this;
 603     aout_sys_t *p_sys = p_aout->output.p_sys;
 604
 605     msg_Dbg( p_aout, "closing audio device" );
 606
 607     /* kill the position notification thread, if any */
 608     if( p_sys->p_notif )
 609     {
 610         vlc_atomic_set(&p_aout->output.p_sys->p_notif->abort, 1);
 611         /* wake up the audio thread if needed */
 612         if( !p_sys->b_playing ) SetEvent( p_sys->p_notif->event );
 613
 614         vlc_join( p_sys->p_notif->thread, NULL );
 615         free( p_sys->p_notif );
 616     }
 617
 618     /* release the secondary buffer */
 619     DestroyDSBuffer( p_aout );
 620
 621     /* finally release the DirectSound object */
 622     if( p_sys->p_dsobject ) IDirectSound_Release( p_sys->p_dsobject );
 623
 624     /* free DSOUND.DLL */
 625     if( p_sys->hdsound_dll ) FreeLibrary( p_sys->hdsound_dll );
 626
 627     free( p_aout->output.p_sys->p_device_guid );
 628     free( p_sys );
 629 }
 630
 631 /*****************************************************************************
 632  * CallBackDirectSoundEnum: callback to enumerate available devices
 633  *****************************************************************************/
 634 static int CALLBACK CallBackDirectSoundEnum( LPGUID p_guid, LPCWSTR psz_desc,
 635                                              LPCWSTR psz_mod, LPVOID _p_aout )
 636 {
 637     VLC_UNUSED( psz_mod );
 638
 639     aout_instance_t *p_aout = (aout_instance_t *)_p_aout;
 640
 641     char *psz_device = FromWide( psz_desc );
 642     msg_Dbg( p_aout, "found device: %s", psz_device );
 643
 644     if( p_aout->output.p_sys->psz_device &&
 645         !strcmp(p_aout->output.p_sys->psz_device, psz_device) && p_guid )
 646     {
 647         /* Use the device corresponding to psz_device */
 648         p_aout->output.p_sys->p_device_guid = malloc( sizeof( GUID ) );
 649         *p_aout->output.p_sys->p_device_guid = *p_guid;
 650         msg_Dbg( p_aout, "using device: %s", psz_device );
 651     }
 652     else
 653     {
 654         /* If no default device has been selected, chose the first one */
 655         if( !p_aout->output.p_sys->psz_device && p_guid )
 656         {
 657             p_aout->output.p_sys->psz_device = strdup( psz_device );
 658             p_aout->output.p_sys->p_device_guid = malloc( sizeof( GUID ) );
 659             *p_aout->output.p_sys->p_device_guid = *p_guid;
 660             msg_Dbg( p_aout, "using device: %s", psz_device );
 661         }
 662     }
 663
 664     free( psz_device );
 665     return true;
 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)(LPDSENUMCALLBACKW, 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 = var_InheritString(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 address (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_aout, "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( void *data )
1013 {
1014     notification_thread_t *p_notif = (notification_thread_t*)data;
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_aout, "DirectSoundThread ready" );
1023
1024     /* Wait here until Play() is called */
1025     WaitForSingleObject( p_notif->event, INFINITE );
1026
1027     if( !vlc_atomic_get( &p_notif->abort) )
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_atomic_get( &p_notif->abort ) )
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_aout, "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, LPCWSTR psz_desc,
1122                                              LPCWSTR 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 true;
1129 }
1130
1131 /*****************************************************************************
1132  * CallBackConfigEnum: callback to add available devices to the preferences list
1133  *****************************************************************************/
1134 static int CALLBACK CallBackConfigEnum( LPGUID p_guid, LPCWSTR psz_desc,
1135                                              LPCWSTR psz_mod, LPVOID _p_item )
1136 {
1137     VLC_UNUSED( psz_mod ); VLC_UNUSED( p_guid );
1138
1139     module_config_t *p_item = (module_config_t *) _p_item;
1140
1141     p_item->ppsz_list[p_item->i_list] = FromWide( psz_desc );
1142     p_item->ppsz_list_text[p_item->i_list] = FromWide( psz_desc );
1143     p_item->i_list++;
1144     return true;
1145 }
1146
1147 /*****************************************************************************
1148  * ReloadDirectXDevices: store the list of devices in preferences
1149  *****************************************************************************/
1150 static int ReloadDirectXDevices( vlc_object_t *p_this, char const *psz_name,
1151                                  vlc_value_t newval, vlc_value_t oldval, void *data )
1152 {
1153     VLC_UNUSED( newval ); VLC_UNUSED( oldval ); VLC_UNUSED( data );
1154
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         for( int i = 0; i < p_item->i_list; i++ )
1162         {
1163             free((char *)(p_item->ppsz_list[i]) );
1164             free((char *)(p_item->ppsz_list_text[i]) );
1165         }
1166     }
1167
1168     HRESULT (WINAPI *OurDirectSoundEnumerate)(LPDSENUMCALLBACKW, LPVOID);
1169
1170     HANDLE hdsound_dll = LoadLibrary("DSOUND.DLL");
1171     if( hdsound_dll == NULL )
1172     {
1173         msg_Warn( p_this, "cannot open DSOUND.DLL" );
1174         return VLC_SUCCESS;
1175     }
1176
1177     /* Get DirectSoundEnumerate */
1178     OurDirectSoundEnumerate = (void *)
1179                     GetProcAddress( hdsound_dll, "DirectSoundEnumerateW" );
1180
1181     if( OurDirectSoundEnumerate == NULL )
1182         goto error;
1183
1184     int nb_devices = 0;
1185     OurDirectSoundEnumerate(CallBackConfigNBEnum, &nb_devices);
1186     msg_Dbg(p_this,"found %d devices", nb_devices);
1187
1188     p_item->ppsz_list = xrealloc( p_item->ppsz_list,
1189                                   nb_devices * sizeof(char *) );
1190     p_item->ppsz_list_text = xrealloc( p_item->ppsz_list_text,
1191                                   nb_devices * sizeof(char *) );
1192
1193     p_item->i_list = 0;
1194     OurDirectSoundEnumerate(CallBackConfigEnum, p_item);
1195
1196     /* Signal change to the interface */
1197     p_item->b_dirty = true;
1198
1199 error:
1200     FreeLibrary(hdsound_dll);
1201
1202     return VLC_SUCCESS;
1203 }
1204