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 VideoLAN
   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., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27 #include <errno.h>                                                 /* ENOMEM */
  28 #include <fcntl.h>                                       /* open(), O_WRONLY */
  29 #include <string.h>                                            /* strerror() */
  30
  31 #include <stdlib.h>                            /* calloc(), malloc(), free() */
  32
  33 #include <vlc/vlc.h>
  34 #include <vlc/aout.h>
  35 #include "aout_internal.h"
  36
  37 #include <windows.h>
  38 #include <mmsystem.h>
  39 #include <dsound.h>
  40
  41 #define FRAME_SIZE 2048              /* The size is in samples, not in bytes */
  42 #define FRAMES_NUM 8
  43
  44 /* frame buffer status */
  45 #define FRAME_QUEUED 0
  46 #define FRAME_EMPTY 1
  47
  48 /*****************************************************************************
  49  * DirectSound GUIDs.
  50  * Defining them here allows us to get rid of the dxguid library during
  51  * the linking stage.
  52  *****************************************************************************/
  53 #include <initguid.h>
  54 DEFINE_GUID(IID_IDirectSoundNotify, 0xb0210783, 0x89cd, 0x11d0, 0xaf, 0x8, 0x0, 0xa0, 0xc9, 0x25, 0xcd, 0x16);
  55
  56 /*****************************************************************************
  57  * Useful macros
  58  *****************************************************************************/
  59 #ifndef WAVE_FORMAT_IEEE_FLOAT
  60 #   define WAVE_FORMAT_IEEE_FLOAT 0x0003
  61 #endif
  62
  63 #ifndef WAVE_FORMAT_DOLBY_AC3_SPDIF
  64 #   define WAVE_FORMAT_DOLBY_AC3_SPDIF 0x0092
  65 #endif
  66
  67 #ifndef WAVE_FORMAT_EXTENSIBLE
  68 #define  WAVE_FORMAT_EXTENSIBLE   0xFFFE
  69 #endif
  70
  71 #ifndef SPEAKER_FRONT_LEFT
  72 #   define SPEAKER_FRONT_LEFT             0x1
  73 #   define SPEAKER_FRONT_RIGHT            0x2
  74 #   define SPEAKER_FRONT_CENTER           0x4
  75 #   define SPEAKER_LOW_FREQUENCY          0x8
  76 #   define SPEAKER_BACK_LEFT              0x10
  77 #   define SPEAKER_BACK_RIGHT             0x20
  78 #   define SPEAKER_FRONT_LEFT_OF_CENTER   0x40
  79 #   define SPEAKER_FRONT_RIGHT_OF_CENTER  0x80
  80 #   define SPEAKER_BACK_CENTER            0x100
  81 #   define SPEAKER_SIDE_LEFT              0x200
  82 #   define SPEAKER_SIDE_RIGHT             0x400
  83 #   define SPEAKER_TOP_CENTER             0x800
  84 #   define SPEAKER_TOP_FRONT_LEFT         0x1000
  85 #   define SPEAKER_TOP_FRONT_CENTER       0x2000
  86 #   define SPEAKER_TOP_FRONT_RIGHT        0x4000
  87 #   define SPEAKER_TOP_BACK_LEFT          0x8000
  88 #   define SPEAKER_TOP_BACK_CENTER        0x10000
  89 #   define SPEAKER_TOP_BACK_RIGHT         0x20000
  90 #   define SPEAKER_RESERVED               0x80000000
  91 #endif
  92
  93 #ifndef DSSPEAKER_HEADPHONE
  94 #   define DSSPEAKER_HEADPHONE         0x00000001
  95 #endif
  96 #ifndef DSSPEAKER_MONO
  97 #   define DSSPEAKER_MONO              0x00000002
  98 #endif
  99 #ifndef DSSPEAKER_QUAD
 100 #   define DSSPEAKER_QUAD              0x00000003
 101 #endif
 102 #ifndef DSSPEAKER_STEREO
 103 #   define DSSPEAKER_STEREO            0x00000004
 104 #endif
 105 #ifndef DSSPEAKER_SURROUND
 106 #   define DSSPEAKER_SURROUND          0x00000005
 107 #endif
 108 #ifndef DSSPEAKER_5POINT1
 109 #   define DSSPEAKER_5POINT1           0x00000006
 110 #endif
 111
 112 #ifndef _WAVEFORMATEXTENSIBLE_
 113 typedef struct {
 114     WAVEFORMATEX    Format;
 115     union {
 116         WORD wValidBitsPerSample;       /* bits of precision  */
 117         WORD wSamplesPerBlock;          /* valid if wBitsPerSample==0 */
 118         WORD wReserved;                 /* If neither applies, set to zero. */
 119     } Samples;
 120     DWORD           dwChannelMask;      /* which channels are */
 121                                         /* present in stream  */
 122     GUID            SubFormat;
 123 } WAVEFORMATEXTENSIBLE, *PWAVEFORMATEXTENSIBLE;
 124 #endif
 125
 126 DEFINE_GUID( _KSDATAFORMAT_SUBTYPE_IEEE_FLOAT, WAVE_FORMAT_IEEE_FLOAT, 0x0000, 0x0010, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 );
 127 DEFINE_GUID( _KSDATAFORMAT_SUBTYPE_PCM, WAVE_FORMAT_PCM, 0x0000, 0x0010, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 );
 128 DEFINE_GUID( _KSDATAFORMAT_SUBTYPE_DOLBY_AC3_SPDIF, WAVE_FORMAT_DOLBY_AC3_SPDIF, 0x0000, 0x0010, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 );
 129
 130 /*****************************************************************************
 131  * notification_thread_t: DirectX event thread
 132  *****************************************************************************/
 133 typedef struct notification_thread_t
 134 {
 135     VLC_COMMON_MEMBERS
 136
 137     aout_instance_t * p_aout;
 138     int i_frame_status[FRAMES_NUM];           /* status of each frame buffer */
 139     DSBPOSITIONNOTIFY p_events[FRAMES_NUM];      /* play notification events */
 140     int i_frame_size;                         /* Size in bytes of one frame */
 141
 142     mtime_t start_date;
 143
 144 } notification_thread_t;
 145
 146 /*****************************************************************************
 147  * aout_sys_t: directx audio output method descriptor
 148  *****************************************************************************
 149  * This structure is part of the audio output thread descriptor.
 150  * It describes the direct sound specific properties of an audio device.
 151  *****************************************************************************/
 152 struct aout_sys_t
 153 {
 154     HINSTANCE           hdsound_dll;      /* handle of the opened dsound dll */
 155     LPDIRECTSOUND       p_dsobject;              /* main Direct Sound object */
 156     LPDIRECTSOUNDBUFFER p_dsbuffer;   /* the sound buffer we use (direct sound
 157                                        * takes care of mixing all the
 158                                        * secondary buffers into the primary) */
 159
 160     LPDIRECTSOUNDNOTIFY p_dsnotify;         /* the position notify interface */
 161     notification_thread_t *p_notif;                  /* DirectSoundThread id */
 162
 163     int b_playing;                                         /* playing status */
 164
 165     int i_frame_size;                         /* Size in bytes of one frame */
 166
 167     vlc_bool_t b_chan_reorder;              /* do we need channel reordering */
 168     int pi_chan_table[AOUT_CHAN_MAX];
 169     uint32_t i_channel_mask;
 170     uint32_t i_bits_per_sample;
 171     uint32_t i_channels;
 172 };
 173
 174 static const uint32_t pi_channels_src[] =
 175     { AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT,
 176       AOUT_CHAN_MIDDLELEFT, AOUT_CHAN_MIDDLERIGHT,
 177       AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT,
 178       AOUT_CHAN_CENTER, AOUT_CHAN_LFE, 0 };
 179 static const uint32_t pi_channels_in[] =
 180     { SPEAKER_FRONT_LEFT, SPEAKER_FRONT_RIGHT,
 181       SPEAKER_SIDE_LEFT, SPEAKER_SIDE_RIGHT,
 182       SPEAKER_BACK_LEFT, SPEAKER_BACK_RIGHT,
 183       SPEAKER_FRONT_CENTER, SPEAKER_LOW_FREQUENCY, 0 };
 184 static const uint32_t pi_channels_out[] =
 185     { SPEAKER_FRONT_LEFT, SPEAKER_FRONT_RIGHT,
 186       SPEAKER_FRONT_CENTER, SPEAKER_LOW_FREQUENCY,
 187       SPEAKER_BACK_LEFT, SPEAKER_BACK_RIGHT,
 188       SPEAKER_SIDE_LEFT, SPEAKER_SIDE_RIGHT, 0 };
 189
 190 /*****************************************************************************
 191  * Local prototypes.
 192  *****************************************************************************/
 193 static int  OpenAudio  ( vlc_object_t * );
 194 static void CloseAudio ( vlc_object_t * );
 195 static void Play       ( aout_instance_t * );
 196
 197 /* local functions */
 198 static void Probe             ( aout_instance_t * );
 199 static int  InitDirectSound   ( aout_instance_t * );
 200 static int  CreateDSBuffer    ( aout_instance_t *, int, int, int, int, int, vlc_bool_t );
 201 static int  CreateDSBufferPCM ( aout_instance_t *, int*, int, int, int, vlc_bool_t );
 202 static void DestroyDSBuffer   ( aout_instance_t * );
 203 static void DirectSoundThread ( notification_thread_t * );
 204 static int  FillBuffer        ( aout_instance_t *, int, aout_buffer_t * );
 205
 206 /*****************************************************************************
 207  * Module descriptor
 208  *****************************************************************************/
 209 vlc_module_begin();
 210     set_description( _("DirectX audio output") );
 211     set_shortname( "DirectX" );
 212     set_capability( "audio output", 100 );
 213     set_category( CAT_AUDIO );
 214     set_subcategory( SUBCAT_AUDIO_AOUT );
 215     add_shortcut( "directx" );
 216     set_callbacks( OpenAudio, CloseAudio );
 217 vlc_module_end();
 218
 219 /*****************************************************************************
 220  * OpenAudio: open the audio device
 221  *****************************************************************************
 222  * This function opens and setups Direct Sound.
 223  *****************************************************************************/
 224 static int OpenAudio( vlc_object_t *p_this )
 225 {
 226     aout_instance_t * p_aout = (aout_instance_t *)p_this;
 227     vlc_value_t val;
 228     int i;
 229
 230     msg_Dbg( p_aout, "OpenAudio" );
 231
 232    /* Allocate structure */
 233     p_aout->output.p_sys = malloc( sizeof( aout_sys_t ) );
 234     if( p_aout->output.p_sys == NULL )
 235     {
 236         msg_Err( p_aout, "out of memory" );
 237         return VLC_EGENERIC;
 238     }
 239
 240     /* Initialize some variables */
 241     p_aout->output.p_sys->p_dsobject = NULL;
 242     p_aout->output.p_sys->p_dsbuffer = NULL;
 243     p_aout->output.p_sys->p_dsnotify = NULL;
 244     p_aout->output.p_sys->p_notif = NULL;
 245     p_aout->output.p_sys->b_playing = 0;
 246
 247     p_aout->output.pf_play = Play;
 248     aout_VolumeSoftInit( p_aout );
 249
 250     /* Initialise DirectSound */
 251     if( InitDirectSound( p_aout ) )
 252     {
 253         msg_Err( p_aout, "cannot initialize DirectSound" );
 254         goto error;
 255     }
 256
 257     if( var_Type( p_aout, "audio-device" ) == 0 )
 258     {
 259         Probe( p_aout );
 260     }
 261
 262     if( var_Get( p_aout, "audio-device", &val ) < 0 )
 263     {
 264         /* Probe() has failed. */
 265         goto error;
 266     }
 267
 268     /* Now we need to setup our DirectSound play notification structure */
 269     p_aout->output.p_sys->p_notif =
 270         vlc_object_create( p_aout, sizeof(notification_thread_t) );
 271     p_aout->output.p_sys->p_notif->p_aout = p_aout;
 272
 273     /* Then create the notification events */
 274     for( i = 0; i < FRAMES_NUM; i++ )
 275         p_aout->output.p_sys->p_notif->p_events[i].hEventNotify =
 276             CreateEvent( NULL, FALSE, FALSE, NULL );
 277
 278     /* Open the device */
 279     if( val.i_int == AOUT_VAR_SPDIF )
 280     {
 281         p_aout->output.output.i_format = VLC_FOURCC('s','p','d','i');
 282
 283         /* Calculate the frame size in bytes */
 284         p_aout->output.i_nb_samples = A52_FRAME_NB;
 285         p_aout->output.output.i_bytes_per_frame = AOUT_SPDIF_SIZE;
 286         p_aout->output.output.i_frame_length = A52_FRAME_NB;
 287         p_aout->output.p_sys->i_frame_size =
 288             p_aout->output.output.i_bytes_per_frame;
 289
 290         if( CreateDSBuffer( p_aout, VLC_FOURCC('s','p','d','i'),
 291                             p_aout->output.output.i_physical_channels,
 292                             aout_FormatNbChannels( &p_aout->output.output ),
 293                             p_aout->output.output.i_rate,
 294                             p_aout->output.p_sys->i_frame_size, VLC_FALSE )
 295             != VLC_SUCCESS )
 296         {
 297             msg_Err( p_aout, "cannot open directx audio device" );
 298             free( p_aout->output.p_sys );
 299             return VLC_EGENERIC;
 300         }
 301
 302         aout_VolumeNoneInit( p_aout );
 303     }
 304     else
 305     {
 306         if( val.i_int == AOUT_VAR_5_1 )
 307         {
 308             p_aout->output.output.i_physical_channels
 309                 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
 310                    | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT
 311                    | AOUT_CHAN_LFE;
 312         }
 313         else if( val.i_int == AOUT_VAR_3F2R )
 314         {
 315             p_aout->output.output.i_physical_channels
 316                 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
 317                    | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
 318         }
 319         else if( val.i_int == AOUT_VAR_2F2R )
 320         {
 321             p_aout->output.output.i_physical_channels
 322                 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT
 323                    | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
 324         }
 325         else if( val.i_int == AOUT_VAR_MONO )
 326         {
 327             p_aout->output.output.i_physical_channels = AOUT_CHAN_CENTER;
 328         }
 329         else
 330         {
 331             p_aout->output.output.i_physical_channels
 332                 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
 333         }
 334
 335         if( CreateDSBufferPCM( p_aout, &p_aout->output.output.i_format,
 336                                p_aout->output.output.i_physical_channels,
 337                                aout_FormatNbChannels( &p_aout->output.output ),
 338                                p_aout->output.output.i_rate, VLC_FALSE )
 339             != VLC_SUCCESS )
 340         {
 341             msg_Err( p_aout, "cannot open directx audio device" );
 342             free( p_aout->output.p_sys );
 343             return VLC_EGENERIC;
 344         }
 345
 346         /* Calculate the frame size in bytes */
 347         p_aout->output.i_nb_samples = FRAME_SIZE;
 348         aout_FormatPrepare( &p_aout->output.output );
 349         p_aout->output.p_sys->i_frame_size =
 350             FRAME_SIZE * p_aout->output.output.i_bytes_per_frame;
 351
 352         aout_VolumeSoftInit( p_aout );
 353     }
 354
 355     /* then launch the notification thread */
 356     msg_Dbg( p_aout, "creating DirectSoundThread" );
 357     if( vlc_thread_create( p_aout->output.p_sys->p_notif,
 358                            "DirectSound Notification Thread",
 359                            DirectSoundThread,
 360                            VLC_THREAD_PRIORITY_HIGHEST, VLC_FALSE ) )
 361     {
 362         msg_Err( p_aout, "cannot create DirectSoundThread" );
 363         goto error;
 364     }
 365
 366     vlc_object_attach( p_aout->output.p_sys->p_notif, p_aout );
 367
 368     return VLC_SUCCESS;
 369
 370  error:
 371     CloseAudio( VLC_OBJECT(p_aout) );
 372     return VLC_EGENERIC;
 373 }
 374
 375 /*****************************************************************************
 376  * Probe: probe the audio device for available formats and channels
 377  *****************************************************************************/
 378 static void Probe( aout_instance_t * p_aout )
 379 {
 380     vlc_value_t val, text;
 381     int i_format;
 382     unsigned int i_physical_channels;
 383     DWORD ui_speaker_config;
 384
 385     var_Create( p_aout, "audio-device", VLC_VAR_INTEGER | VLC_VAR_HASCHOICE );
 386     text.psz_string = _("Audio Device");
 387     var_Change( p_aout, "audio-device", VLC_VAR_SETTEXT, &text, NULL );
 388
 389     /* Test for 5.1 support */
 390     i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
 391                           AOUT_CHAN_CENTER | AOUT_CHAN_REARLEFT |
 392                           AOUT_CHAN_REARRIGHT | AOUT_CHAN_LFE;
 393     if( p_aout->output.output.i_physical_channels == i_physical_channels )
 394     {
 395         if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 6,
 396                                p_aout->output.output.i_rate, VLC_TRUE )
 397             == VLC_SUCCESS )
 398         {
 399             val.i_int = AOUT_VAR_5_1;
 400             text.psz_string = N_("5.1");
 401             var_Change( p_aout, "audio-device",
 402                         VLC_VAR_ADDCHOICE, &val, &text );
 403             msg_Dbg( p_aout, "device supports 5.1 channels" );
 404         }
 405     }
 406
 407     /* Test for 3 Front 2 Rear support */
 408     i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
 409                           AOUT_CHAN_CENTER | AOUT_CHAN_REARLEFT |
 410                           AOUT_CHAN_REARRIGHT;
 411     if( p_aout->output.output.i_physical_channels == i_physical_channels )
 412     {
 413         if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 5,
 414                                p_aout->output.output.i_rate, VLC_TRUE )
 415             == VLC_SUCCESS )
 416         {
 417             val.i_int = AOUT_VAR_3F2R;
 418             text.psz_string = N_("3 Front 2 Rear");
 419             var_Change( p_aout, "audio-device",
 420                         VLC_VAR_ADDCHOICE, &val, &text );
 421             msg_Dbg( p_aout, "device supports 5 channels" );
 422         }
 423     }
 424
 425     /* Test for 2 Front 2 Rear support */
 426     i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
 427                           AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
 428     if( ( p_aout->output.output.i_physical_channels & i_physical_channels )
 429         == i_physical_channels )
 430     {
 431         if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 4,
 432                                p_aout->output.output.i_rate, VLC_TRUE )
 433             == VLC_SUCCESS )
 434         {
 435             val.i_int = AOUT_VAR_2F2R;
 436             text.psz_string = N_("2 Front 2 Rear");
 437             var_Change( p_aout, "audio-device",
 438                         VLC_VAR_ADDCHOICE, &val, &text );
 439             msg_Dbg( p_aout, "device supports 4 channels" );
 440         }
 441     }
 442
 443     /* Test for stereo support */
 444     i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
 445     if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 2,
 446                            p_aout->output.output.i_rate, VLC_TRUE )
 447         == VLC_SUCCESS )
 448     {
 449         val.i_int = AOUT_VAR_STEREO;
 450         text.psz_string = N_("Stereo");
 451         var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
 452         var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
 453         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, VLC_TRUE )
 460         == VLC_SUCCESS )
 461     {
 462         val.i_int = AOUT_VAR_MONO;
 463         text.psz_string = N_("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     }
 475     switch( DSSPEAKER_CONFIG(ui_speaker_config) )
 476     {
 477     case DSSPEAKER_5POINT1:
 478         val.i_int = AOUT_VAR_5_1;
 479         break;
 480     case DSSPEAKER_QUAD:
 481         val.i_int = AOUT_VAR_2F2R;
 482         break;
 483 #if 0 /* Lots of people just get their settings wrong and complain that
 484        * this is a problem with VLC so just don't ever set mono by default. */
 485     case DSSPEAKER_MONO:
 486         val.i_int = AOUT_VAR_MONO;
 487         break;
 488 #endif
 489     case DSSPEAKER_SURROUND:
 490     case DSSPEAKER_STEREO:
 491     default:
 492         val.i_int = AOUT_VAR_STEREO;
 493         break;
 494     }
 495     var_Set( p_aout, "audio-device", val );
 496
 497     /* Test for SPDIF support */
 498     if ( AOUT_FMT_NON_LINEAR( &p_aout->output.output ) )
 499     {
 500         if( CreateDSBuffer( p_aout, VLC_FOURCC('s','p','d','i'),
 501                             p_aout->output.output.i_physical_channels,
 502                             aout_FormatNbChannels( &p_aout->output.output ),
 503                             p_aout->output.output.i_rate,
 504                             AOUT_SPDIF_SIZE, VLC_TRUE )
 505             == VLC_SUCCESS )
 506         {
 507             msg_Dbg( p_aout, "device supports A/52 over S/PDIF" );
 508             val.i_int = AOUT_VAR_SPDIF;
 509             text.psz_string = N_("A/52 over S/PDIF");
 510             var_Change( p_aout, "audio-device",
 511                         VLC_VAR_ADDCHOICE, &val, &text );
 512             if( config_GetInt( p_aout, "spdif" ) )
 513                 var_Set( p_aout, "audio-device", val );
 514         }
 515     }
 516
 517     var_Change( p_aout, "audio-device", VLC_VAR_CHOICESCOUNT, &val, NULL );
 518     if( val.i_int <= 0 )
 519     {
 520         /* Probe() has failed. */
 521         var_Destroy( p_aout, "audio-device" );
 522         return;
 523     }
 524
 525     var_AddCallback( p_aout, "audio-device", aout_ChannelsRestart, NULL );
 526
 527     val.b_bool = VLC_TRUE;
 528     var_Set( p_aout, "intf-change", val );
 529 }
 530
 531 /*****************************************************************************
 532  * Play: we'll start playing the directsound buffer here because at least here
 533  *       we know the first buffer has been put in the aout fifo and we also
 534  *       know its date.
 535  *****************************************************************************/
 536 static void Play( aout_instance_t *p_aout )
 537 {
 538     if( !p_aout->output.p_sys->b_playing )
 539     {
 540         aout_buffer_t *p_buffer;
 541
 542         p_aout->output.p_sys->b_playing = 1;
 543
 544         /* get the playing date of the first aout buffer */
 545         p_aout->output.p_sys->p_notif->start_date =
 546             aout_FifoFirstDate( p_aout, &p_aout->output.fifo );
 547
 548         /* fill in the first samples */
 549         p_buffer = aout_FifoPop( p_aout, &p_aout->output.fifo );
 550         FillBuffer( p_aout, 0, p_buffer );
 551
 552         /* wake up the audio output thread */
 553         SetEvent( p_aout->output.p_sys->p_notif->p_events[0].hEventNotify );
 554     }
 555 }
 556
 557 /*****************************************************************************
 558  * CloseAudio: close the audio device
 559  *****************************************************************************/
 560 static void CloseAudio( vlc_object_t *p_this )
 561 {
 562     aout_instance_t * p_aout = (aout_instance_t *)p_this;
 563     aout_sys_t *p_sys = p_aout->output.p_sys;
 564
 565     msg_Dbg( p_aout, "CloseAudio" );
 566
 567     /* kill the position notification thread, if any */
 568     if( p_sys->p_notif )
 569     {
 570         vlc_object_detach( p_sys->p_notif );
 571         if( p_sys->p_notif->b_thread )
 572         {
 573             p_sys->p_notif->b_die = 1;
 574
 575             if( !p_sys->b_playing )
 576                 /* wake up the audio thread */
 577                 SetEvent( p_sys->p_notif->p_events[0].hEventNotify );
 578
 579             vlc_thread_join( p_sys->p_notif );
 580         }
 581         vlc_object_destroy( p_sys->p_notif );
 582     }
 583
 584     /* release the secondary buffer */
 585     DestroyDSBuffer( p_aout );
 586
 587     /* finally release the DirectSound object */
 588     if( p_sys->p_dsobject ) IDirectSound_Release( p_sys->p_dsobject );
 589
 590     /* free DSOUND.DLL */
 591     if( p_sys->hdsound_dll ) FreeLibrary( p_sys->hdsound_dll );
 592
 593     free( p_sys );
 594 }
 595
 596 /*****************************************************************************
 597  * InitDirectSound: handle all the gory details of DirectSound initialisation
 598  *****************************************************************************/
 599 static int InitDirectSound( aout_instance_t *p_aout )
 600 {
 601     HRESULT (WINAPI *OurDirectSoundCreate)(LPGUID, LPDIRECTSOUND *, LPUNKNOWN);
 602
 603     p_aout->output.p_sys->hdsound_dll = LoadLibrary("DSOUND.DLL");
 604     if( p_aout->output.p_sys->hdsound_dll == NULL )
 605     {
 606         msg_Warn( p_aout, "cannot open DSOUND.DLL" );
 607         goto error;
 608     }
 609
 610     OurDirectSoundCreate = (void *)GetProcAddress(
 611                                            p_aout->output.p_sys->hdsound_dll,
 612                                            "DirectSoundCreate" );
 613     if( OurDirectSoundCreate == NULL )
 614     {
 615         msg_Warn( p_aout, "GetProcAddress FAILED" );
 616         goto error;
 617     }
 618
 619     /* Create the direct sound object */
 620     if FAILED( OurDirectSoundCreate( NULL, &p_aout->output.p_sys->p_dsobject,
 621                                      NULL ) )
 622     {
 623         msg_Warn( p_aout, "cannot create a direct sound device" );
 624         goto error;
 625     }
 626
 627     /* Set DirectSound Cooperative level, ie what control we want over Windows
 628      * sound device. In our case, DSSCL_EXCLUSIVE means that we can modify the
 629      * settings of the primary buffer, but also that only the sound of our
 630      * application will be hearable when it will have the focus.
 631      * !!! (this is not really working as intended yet because to set the
 632      * cooperative level you need the window handle of your application, and
 633      * I don't know of any easy way to get it. Especially since we might play
 634      * sound without any video, and so what window handle should we use ???
 635      * The hack for now is to use the Desktop window handle - it seems to be
 636      * working */
 637     if( IDirectSound_SetCooperativeLevel( p_aout->output.p_sys->p_dsobject,
 638                                           GetDesktopWindow(),
 639                                           DSSCL_EXCLUSIVE) )
 640     {
 641         msg_Warn( p_aout, "cannot set direct sound cooperative level" );
 642     }
 643
 644     return VLC_SUCCESS;
 645
 646  error:
 647     p_aout->output.p_sys->p_dsobject = NULL;
 648     if( p_aout->output.p_sys->hdsound_dll )
 649     {
 650         FreeLibrary( p_aout->output.p_sys->hdsound_dll );
 651         p_aout->output.p_sys->hdsound_dll = NULL;
 652     }
 653     return VLC_EGENERIC;
 654
 655 }
 656
 657 /*****************************************************************************
 658  * CreateDSBuffer: Creates a direct sound buffer of the required format.
 659  *****************************************************************************
 660  * This function creates the buffer we'll use to play audio.
 661  * In DirectSound there are two kinds of buffers:
 662  * - the primary buffer: which is the actual buffer that the soundcard plays
 663  * - the secondary buffer(s): these buffers are the one actually used by
 664  *    applications and DirectSound takes care of mixing them into the primary.
 665  *
 666  * Once you create a secondary buffer, you cannot change its format anymore so
 667  * you have to release the current one and create another.
 668  *****************************************************************************/
 669 static int CreateDSBuffer( aout_instance_t *p_aout, int i_format,
 670                            int i_channels, int i_nb_channels, int i_rate,
 671                            int i_bytes_per_frame, vlc_bool_t b_probe )
 672 {
 673     WAVEFORMATEXTENSIBLE waveformat;
 674     DSBUFFERDESC         dsbdesc;
 675     unsigned int         i;
 676
 677     /* First set the sound buffer format */
 678     waveformat.dwChannelMask = 0;
 679     for( i = 0; i < sizeof(pi_channels_src)/sizeof(uint32_t); i++ )
 680     {
 681         if( i_channels & pi_channels_src[i] )
 682             waveformat.dwChannelMask |= pi_channels_in[i];
 683     }
 684
 685     switch( i_format )
 686     {
 687     case VLC_FOURCC('s','p','d','i'):
 688         i_nb_channels = 2;
 689         /* To prevent channel re-ordering */
 690         waveformat.dwChannelMask = SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT;
 691         waveformat.Format.wBitsPerSample = 16;
 692         waveformat.Samples.wValidBitsPerSample =
 693             waveformat.Format.wBitsPerSample;
 694         waveformat.Format.wFormatTag = WAVE_FORMAT_DOLBY_AC3_SPDIF;
 695         waveformat.SubFormat = _KSDATAFORMAT_SUBTYPE_DOLBY_AC3_SPDIF;
 696         break;
 697
 698     case VLC_FOURCC('f','l','3','2'):
 699         waveformat.Format.wBitsPerSample = sizeof(float) * 8;
 700         waveformat.Samples.wValidBitsPerSample =
 701             waveformat.Format.wBitsPerSample;
 702         waveformat.Format.wFormatTag = WAVE_FORMAT_IEEE_FLOAT;
 703         waveformat.SubFormat = _KSDATAFORMAT_SUBTYPE_IEEE_FLOAT;
 704         break;
 705
 706     case VLC_FOURCC('s','1','6','l'):
 707         waveformat.Format.wBitsPerSample = 16;
 708         waveformat.Samples.wValidBitsPerSample =
 709             waveformat.Format.wBitsPerSample;
 710         waveformat.Format.wFormatTag = WAVE_FORMAT_PCM;
 711         waveformat.SubFormat = _KSDATAFORMAT_SUBTYPE_PCM;
 712         break;
 713     }
 714
 715     waveformat.Format.nChannels = i_nb_channels;
 716     waveformat.Format.nSamplesPerSec = i_rate;
 717     waveformat.Format.nBlockAlign =
 718         waveformat.Format.wBitsPerSample / 8 * i_nb_channels;
 719     waveformat.Format.nAvgBytesPerSec =
 720         waveformat.Format.nSamplesPerSec * waveformat.Format.nBlockAlign;
 721
 722     p_aout->output.p_sys->i_bits_per_sample = waveformat.Format.wBitsPerSample;
 723     p_aout->output.p_sys->i_channels = i_nb_channels;
 724
 725     /* Then fill in the direct sound descriptor */
 726     memset(&dsbdesc, 0, sizeof(DSBUFFERDESC));
 727     dsbdesc.dwSize = sizeof(DSBUFFERDESC);
 728     dsbdesc.dwFlags = DSBCAPS_GETCURRENTPOSITION2/* Better position accuracy */
 729                     | DSBCAPS_CTRLPOSITIONNOTIFY     /* We need notification */
 730                     | DSBCAPS_GLOBALFOCUS;      /* Allows background playing */
 731
 732     /* Only use the new WAVE_FORMAT_EXTENSIBLE format for multichannel audio */
 733     if( i_nb_channels <= 2 )
 734     {
 735         waveformat.Format.cbSize = 0;
 736     }
 737     else
 738     {
 739         waveformat.Format.wFormatTag = WAVE_FORMAT_EXTENSIBLE;
 740         waveformat.Format.cbSize =
 741             sizeof(WAVEFORMATEXTENSIBLE) - sizeof(WAVEFORMATEX);
 742
 743         /* Needed for 5.1 on emu101k */
 744         dsbdesc.dwFlags |= DSBCAPS_LOCHARDWARE;
 745     }
 746
 747     dsbdesc.dwBufferBytes = FRAMES_NUM * i_bytes_per_frame;   /* buffer size */
 748     dsbdesc.lpwfxFormat = (WAVEFORMATEX *)&waveformat;
 749
 750     if FAILED( IDirectSound_CreateSoundBuffer(
 751                    p_aout->output.p_sys->p_dsobject, &dsbdesc,
 752                    &p_aout->output.p_sys->p_dsbuffer, NULL) )
 753     {
 754         if( dsbdesc.dwFlags & DSBCAPS_LOCHARDWARE )
 755         {
 756             /* Try without DSBCAPS_LOCHARDWARE */
 757             dsbdesc.dwFlags &= ~DSBCAPS_LOCHARDWARE;
 758             if FAILED( IDirectSound_CreateSoundBuffer(
 759                    p_aout->output.p_sys->p_dsobject, &dsbdesc,
 760                    &p_aout->output.p_sys->p_dsbuffer, NULL) )
 761             {
 762                 return VLC_EGENERIC;
 763             }
 764             if( !b_probe )
 765                 msg_Dbg( p_aout, "couldn't use hardware sound buffer" );
 766         }
 767         else
 768         {
 769             return VLC_EGENERIC;
 770         }
 771     }
 772
 773     /* Stop here if we were just probing */
 774     if( b_probe )
 775     {
 776         IDirectSoundBuffer_Release( p_aout->output.p_sys->p_dsbuffer );
 777         p_aout->output.p_sys->p_dsbuffer = NULL;
 778         return VLC_SUCCESS;
 779     }
 780
 781     /* Backup the size of a frame */
 782     p_aout->output.p_sys->p_notif->i_frame_size = i_bytes_per_frame;
 783
 784     /* Now the secondary buffer is created, we need to setup its position
 785      * notification */
 786     for( i = 0; i < FRAMES_NUM; i++ )
 787     {
 788         p_aout->output.p_sys->p_notif->p_events[i].dwOffset = i *
 789             p_aout->output.p_sys->p_notif->i_frame_size;
 790
 791         p_aout->output.p_sys->p_notif->i_frame_status[i] = FRAME_EMPTY;
 792     }
 793
 794     /* Get the IDirectSoundNotify interface */
 795     if FAILED( IDirectSoundBuffer_QueryInterface(
 796                                 p_aout->output.p_sys->p_dsbuffer,
 797                                 &IID_IDirectSoundNotify,
 798                                 (LPVOID *)&p_aout->output.p_sys->p_dsnotify ) )
 799     {
 800         msg_Err( p_aout, "cannot get IDirectSoundNotify interface" );
 801         goto error;
 802     }
 803
 804     if FAILED( IDirectSoundNotify_SetNotificationPositions(
 805                                     p_aout->output.p_sys->p_dsnotify,
 806                                     FRAMES_NUM,
 807                                     p_aout->output.p_sys->p_notif->p_events ) )
 808     {
 809         msg_Err( p_aout, "cannot set position notification" );
 810         goto error;
 811     }
 812
 813     p_aout->output.p_sys->i_channel_mask = waveformat.dwChannelMask;
 814
 815     p_aout->output.p_sys->b_chan_reorder =
 816         aout_CheckChannelReorder( pi_channels_in, pi_channels_out,
 817                                   waveformat.dwChannelMask, i_nb_channels,
 818                                   p_aout->output.p_sys->pi_chan_table );
 819
 820     if( p_aout->output.p_sys->b_chan_reorder )
 821     {
 822         msg_Dbg( p_aout, "channel reordering needed" );
 823     }
 824
 825     return VLC_SUCCESS;
 826
 827  error:
 828     DestroyDSBuffer( p_aout );
 829     return VLC_EGENERIC;
 830 }
 831
 832 /*****************************************************************************
 833  * CreateDSBufferPCM: creates a PCM direct sound buffer.
 834  *****************************************************************************
 835  * We first try to create a WAVE_FORMAT_IEEE_FLOAT buffer if supported by
 836  * the hardware, otherwise we create a WAVE_FORMAT_PCM buffer.
 837  ****************************************************************************/
 838 static int CreateDSBufferPCM( aout_instance_t *p_aout, int *i_format,
 839                               int i_channels, int i_nb_channels, int i_rate,
 840                               vlc_bool_t b_probe )
 841 {
 842     /* Float32 audio samples are not supported for 5.1 output on the emu101k */
 843
 844     if( i_nb_channels > 2 ||
 845         CreateDSBuffer( p_aout, VLC_FOURCC('f','l','3','2'),
 846                         i_channels, i_nb_channels, i_rate,
 847                         FRAME_SIZE * 4 * i_nb_channels, b_probe )
 848         != VLC_SUCCESS )
 849     {
 850         if ( CreateDSBuffer( p_aout, VLC_FOURCC('s','1','6','l'),
 851                              i_channels, i_nb_channels, i_rate,
 852                              FRAME_SIZE * 2 * i_nb_channels, b_probe )
 853              != VLC_SUCCESS )
 854         {
 855             return VLC_EGENERIC;
 856         }
 857         else
 858         {
 859             *i_format = VLC_FOURCC('s','1','6','l');
 860             return VLC_SUCCESS;
 861         }
 862     }
 863     else
 864     {
 865         *i_format = VLC_FOURCC('f','l','3','2');
 866         return VLC_SUCCESS;
 867     }
 868 }
 869
 870 /*****************************************************************************
 871  * DestroyDSBuffer
 872  *****************************************************************************
 873  * This function destroys the secondary buffer.
 874  *****************************************************************************/
 875 static void DestroyDSBuffer( aout_instance_t *p_aout )
 876 {
 877     if( p_aout->output.p_sys->p_dsnotify )
 878     {
 879         IDirectSoundNotify_Release( p_aout->output.p_sys->p_dsnotify );
 880         p_aout->output.p_sys->p_dsnotify = NULL;
 881     }
 882
 883     if( p_aout->output.p_sys->p_dsbuffer )
 884     {
 885         IDirectSoundBuffer_Release( p_aout->output.p_sys->p_dsbuffer );
 886         p_aout->output.p_sys->p_dsbuffer = NULL;
 887     }
 888 }
 889
 890 /*****************************************************************************
 891  * FillBuffer: Fill in one of the direct sound frame buffers.
 892  *****************************************************************************
 893  * Returns VLC_SUCCESS on success.
 894  *****************************************************************************/
 895 static int FillBuffer( aout_instance_t *p_aout, int i_frame,
 896                        aout_buffer_t *p_buffer )
 897 {
 898     notification_thread_t *p_notif = p_aout->output.p_sys->p_notif;
 899     aout_sys_t *p_sys = p_aout->output.p_sys;
 900     void *p_write_position, *p_wrap_around;
 901     long l_bytes1, l_bytes2;
 902     HRESULT dsresult;
 903
 904     /* Before copying anything, we have to lock the buffer */
 905     dsresult = IDirectSoundBuffer_Lock(
 906                 p_sys->p_dsbuffer,                              /* DS buffer */
 907                 i_frame * p_notif->i_frame_size,             /* Start offset */
 908                 p_notif->i_frame_size,                    /* Number of bytes */
 909                 &p_write_position,                  /* Address of lock start */
 910                 &l_bytes1,       /* Count of bytes locked before wrap around */
 911                 &p_wrap_around,            /* Buffer adress (if wrap around) */
 912                 &l_bytes2,               /* Count of bytes after wrap around */
 913                 0 );                                                /* Flags */
 914     if( dsresult == DSERR_BUFFERLOST )
 915     {
 916         IDirectSoundBuffer_Restore( p_sys->p_dsbuffer );
 917         dsresult = IDirectSoundBuffer_Lock(
 918                                p_sys->p_dsbuffer,
 919                                i_frame * p_notif->i_frame_size,
 920                                p_notif->i_frame_size,
 921                                &p_write_position,
 922                                &l_bytes1,
 923                                &p_wrap_around,
 924                                &l_bytes2,
 925                                0 );
 926     }
 927     if( dsresult != DS_OK )
 928     {
 929         msg_Warn( p_notif, "cannot lock buffer" );
 930         if( p_buffer ) aout_BufferFree( p_buffer );
 931         return VLC_EGENERIC;
 932     }
 933
 934     if( p_buffer == NULL )
 935     {
 936         memset( p_write_position, 0, l_bytes1 );
 937     }
 938     else
 939     {
 940         if( p_sys->b_chan_reorder )
 941         {
 942             /* Do the channel reordering here */
 943             aout_ChannelReorder( p_buffer->p_buffer, p_buffer->i_nb_bytes,
 944                                  p_sys->i_channels, p_sys->pi_chan_table,
 945                                  p_sys->i_bits_per_sample );
 946         }
 947
 948         p_aout->p_vlc->pf_memcpy( p_write_position, p_buffer->p_buffer,
 949                                   l_bytes1 );
 950         aout_BufferFree( p_buffer );
 951     }
 952
 953     /* Now the data has been copied, unlock the buffer */
 954     IDirectSoundBuffer_Unlock( p_sys->p_dsbuffer, p_write_position, l_bytes1,
 955                                p_wrap_around, l_bytes2 );
 956
 957     return VLC_SUCCESS;
 958 }
 959
 960 /*****************************************************************************
 961  * DirectSoundThread: this thread will capture play notification events.
 962  *****************************************************************************
 963  * We use this thread to emulate a callback mechanism. The thread probes for
 964  * event notification and fills up the DS secondary buffer when needed.
 965  *****************************************************************************/
 966 static void DirectSoundThread( notification_thread_t *p_notif )
 967 {
 968     HANDLE  notification_events[FRAMES_NUM];
 969     HRESULT dsresult;
 970     aout_instance_t *p_aout = p_notif->p_aout;
 971     int i, i_which_frame, i_last_frame, i_next_frame;
 972     mtime_t mtime;
 973     vlc_bool_t b_sleek;
 974
 975     for( i = 0; i < FRAMES_NUM; i++ )
 976         notification_events[i] = p_notif->p_events[i].hEventNotify;
 977
 978     /* We don't want any resampling when using S/PDIF output */
 979     b_sleek = p_aout->output.output.i_format == VLC_FOURCC('s','p','d','i');
 980
 981     /* Tell the main thread that we are ready */
 982     vlc_thread_ready( p_notif );
 983
 984     msg_Dbg( p_notif, "DirectSoundThread ready" );
 985
 986     /* Wait here until Play() is called */
 987     WaitForSingleObject( notification_events[0], INFINITE );
 988
 989     if( !p_notif->b_die )
 990     {
 991         mwait( p_notif->start_date - AOUT_PTS_TOLERANCE / 2 );
 992
 993         /* start playing the buffer */
 994         dsresult = IDirectSoundBuffer_Play( p_aout->output.p_sys->p_dsbuffer,
 995                                         0,                         /* Unused */
 996                                         0,                         /* Unused */
 997                                         DSBPLAY_LOOPING );          /* Flags */
 998         if( dsresult == DSERR_BUFFERLOST )
 999         {
1000             IDirectSoundBuffer_Restore( p_aout->output.p_sys->p_dsbuffer );
1001             dsresult = IDirectSoundBuffer_Play(
1002                                             p_aout->output.p_sys->p_dsbuffer,
1003                                             0,                     /* Unused */
1004                                             0,                     /* Unused */
1005                                             DSBPLAY_LOOPING );      /* Flags */
1006         }
1007         if( dsresult != DS_OK )
1008         {
1009             msg_Err( p_aout, "cannot start playing buffer" );
1010         }
1011     }
1012
1013     while( !p_notif->b_die )
1014     {
1015         aout_buffer_t *p_buffer;
1016         long l_latency;
1017
1018         /* wait for the position notification */
1019         i_which_frame = WaitForMultipleObjects( FRAMES_NUM,
1020                                                 notification_events, 0,
1021                                                 INFINITE ) - WAIT_OBJECT_0;
1022
1023         if( p_notif->b_die )
1024             break;
1025
1026         mtime = mdate();
1027
1028         /* We take into account the current latency */
1029         if SUCCEEDED( IDirectSoundBuffer_GetCurrentPosition(
1030                         p_aout->output.p_sys->p_dsbuffer,
1031                         &l_latency, NULL ) )
1032         {
1033             if( l_latency > (i_which_frame * FRAME_SIZE)
1034                   && l_latency < ((i_which_frame+1) * FRAME_SIZE) )
1035             {
1036                 l_latency = - ( l_latency /
1037                                 p_aout->output.output.i_bytes_per_frame %
1038                                 FRAME_SIZE );
1039             }
1040             else
1041             {
1042                 l_latency = FRAME_SIZE - ( l_latency /
1043                                       p_aout->output.output.i_bytes_per_frame %
1044                                       FRAME_SIZE );
1045             }
1046         }
1047         else
1048         {
1049             l_latency = 0;
1050         }
1051
1052         /* Mark last frame as empty */
1053         i_last_frame = (i_which_frame + FRAMES_NUM -1) % FRAMES_NUM;
1054         i_next_frame = (i_which_frame + 1) % FRAMES_NUM;
1055         p_notif->i_frame_status[i_last_frame] = FRAME_EMPTY;
1056
1057         /* Try to fill in as many frame buffers as possible */
1058         for( i = i_next_frame; (i % FRAMES_NUM) != i_which_frame; i++ )
1059         {
1060
1061             /* Check if frame buf is already filled */
1062             if( p_notif->i_frame_status[i % FRAMES_NUM] == FRAME_QUEUED )
1063                 continue;
1064
1065             p_buffer = aout_OutputNextBuffer( p_aout,
1066                 mtime + 1000000 / p_aout->output.output.i_rate *
1067                 ((i - i_next_frame + 1) * FRAME_SIZE + l_latency), b_sleek );
1068
1069             /* If there is no audio data available and we have some buffered
1070              * already, then just wait for the next time */
1071             if( !p_buffer && (i != i_next_frame) )
1072             {
1073                 //msg_Err( p_aout, "only %i frame buffers filled!",
1074                 //         i - i_next_frame );
1075                 break;
1076             }
1077
1078             if( FillBuffer( p_aout, (i%FRAMES_NUM), p_buffer )
1079                 != VLC_SUCCESS )
1080                 break;
1081
1082             /* Mark the frame buffer as QUEUED */
1083             p_notif->i_frame_status[i%FRAMES_NUM] = FRAME_QUEUED;
1084         }
1085
1086     }
1087
1088     /* make sure the buffer isn't playing */
1089     IDirectSoundBuffer_Stop( p_aout->output.p_sys->p_dsbuffer );
1090
1091     /* free the events */
1092     for( i = 0; i < FRAMES_NUM; i++ )
1093         CloseHandle( notification_events[i] );
1094
1095     msg_Dbg( p_notif, "DirectSoundThread exiting" );
1096 }