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 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Gildas Bazin <gbazin@videolan.org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27 #include <string.h>                                            /* strerror() */
  28
  29 #include <stdlib.h>                            /* calloc(), malloc(), free() */
  30
  31 #include <vlc/vlc.h>
  32 #include <vlc_aout.h>
  33
  34 #include <windows.h>
  35 #include <mmsystem.h>
  36 #include <dsound.h>
  37
  38 #define FRAME_SIZE ((int)p_aout->output.output.i_rate/20) /* Size in samples */
  39 #define FRAMES_NUM 8                                      /* Needs to be > 3 */
  40
  41 /*****************************************************************************
  42  * DirectSound GUIDs.
  43  * Defining them here allows us to get rid of the dxguid library during
  44  * the linking stage.
  45  *****************************************************************************/
  46 #include <initguid.h>
  47
  48 /*****************************************************************************
  49  * Useful macros
  50  *****************************************************************************/
  51 #ifndef WAVE_FORMAT_IEEE_FLOAT
  52 #   define WAVE_FORMAT_IEEE_FLOAT 0x0003
  53 #endif
  54
  55 #ifndef WAVE_FORMAT_DOLBY_AC3_SPDIF
  56 #   define WAVE_FORMAT_DOLBY_AC3_SPDIF 0x0092
  57 #endif
  58
  59 #ifndef WAVE_FORMAT_EXTENSIBLE
  60 #define  WAVE_FORMAT_EXTENSIBLE   0xFFFE
  61 #endif
  62
  63 #ifndef SPEAKER_FRONT_LEFT
  64 #   define SPEAKER_FRONT_LEFT             0x1
  65 #   define SPEAKER_FRONT_RIGHT            0x2
  66 #   define SPEAKER_FRONT_CENTER           0x4
  67 #   define SPEAKER_LOW_FREQUENCY          0x8
  68 #   define SPEAKER_BACK_LEFT              0x10
  69 #   define SPEAKER_BACK_RIGHT             0x20
  70 #   define SPEAKER_FRONT_LEFT_OF_CENTER   0x40
  71 #   define SPEAKER_FRONT_RIGHT_OF_CENTER  0x80
  72 #   define SPEAKER_BACK_CENTER            0x100
  73 #   define SPEAKER_SIDE_LEFT              0x200
  74 #   define SPEAKER_SIDE_RIGHT             0x400
  75 #   define SPEAKER_TOP_CENTER             0x800
  76 #   define SPEAKER_TOP_FRONT_LEFT         0x1000
  77 #   define SPEAKER_TOP_FRONT_CENTER       0x2000
  78 #   define SPEAKER_TOP_FRONT_RIGHT        0x4000
  79 #   define SPEAKER_TOP_BACK_LEFT          0x8000
  80 #   define SPEAKER_TOP_BACK_CENTER        0x10000
  81 #   define SPEAKER_TOP_BACK_RIGHT         0x20000
  82 #   define SPEAKER_RESERVED               0x80000000
  83 #endif
  84
  85 #ifndef DSSPEAKER_HEADPHONE
  86 #   define DSSPEAKER_HEADPHONE         0x00000001
  87 #endif
  88 #ifndef DSSPEAKER_MONO
  89 #   define DSSPEAKER_MONO              0x00000002
  90 #endif
  91 #ifndef DSSPEAKER_QUAD
  92 #   define DSSPEAKER_QUAD              0x00000003
  93 #endif
  94 #ifndef DSSPEAKER_STEREO
  95 #   define DSSPEAKER_STEREO            0x00000004
  96 #endif
  97 #ifndef DSSPEAKER_SURROUND
  98 #   define DSSPEAKER_SURROUND          0x00000005
  99 #endif
 100 #ifndef DSSPEAKER_5POINT1
 101 #   define DSSPEAKER_5POINT1           0x00000006
 102 #endif
 103
 104 #ifndef _WAVEFORMATEXTENSIBLE_
 105 typedef struct {
 106     WAVEFORMATEX    Format;
 107     union {
 108         WORD wValidBitsPerSample;       /* bits of precision  */
 109         WORD wSamplesPerBlock;          /* valid if wBitsPerSample==0 */
 110         WORD wReserved;                 /* If neither applies, set to zero. */
 111     } Samples;
 112     DWORD           dwChannelMask;      /* which channels are */
 113                                         /* present in stream  */
 114     GUID            SubFormat;
 115 } WAVEFORMATEXTENSIBLE, *PWAVEFORMATEXTENSIBLE;
 116 #endif
 117
 118 DEFINE_GUID( _KSDATAFORMAT_SUBTYPE_IEEE_FLOAT, WAVE_FORMAT_IEEE_FLOAT, 0x0000, 0x0010, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 );
 119 DEFINE_GUID( _KSDATAFORMAT_SUBTYPE_PCM, WAVE_FORMAT_PCM, 0x0000, 0x0010, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 );
 120 DEFINE_GUID( _KSDATAFORMAT_SUBTYPE_DOLBY_AC3_SPDIF, WAVE_FORMAT_DOLBY_AC3_SPDIF, 0x0000, 0x0010, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 );
 121
 122 /*****************************************************************************
 123  * notification_thread_t: DirectX event thread
 124  *****************************************************************************/
 125 typedef struct notification_thread_t
 126 {
 127     VLC_COMMON_MEMBERS
 128
 129     aout_instance_t *p_aout;
 130     int i_frame_size;                          /* size in bytes of one frame */
 131     int i_write_slot;       /* current write position in our circular buffer */
 132
 133     mtime_t start_date;
 134     HANDLE event;
 135
 136 } notification_thread_t;
 137
 138 /*****************************************************************************
 139  * aout_sys_t: directx audio output method descriptor
 140  *****************************************************************************
 141  * This structure is part of the audio output thread descriptor.
 142  * It describes the direct sound specific properties of an audio device.
 143  *****************************************************************************/
 144 struct aout_sys_t
 145 {
 146     HINSTANCE           hdsound_dll;      /* handle of the opened dsound dll */
 147
 148     int                 i_device_id;                 /*  user defined device */
 149     LPGUID              p_device_guid;
 150
 151     LPDIRECTSOUND       p_dsobject;              /* main Direct Sound object */
 152     LPDIRECTSOUNDBUFFER p_dsbuffer;   /* the sound buffer we use (direct sound
 153                                        * takes care of mixing all the
 154                                        * secondary buffers into the primary) */
 155
 156     notification_thread_t *p_notif;                  /* DirectSoundThread id */
 157
 158     int b_playing;                                         /* playing status */
 159
 160     int i_frame_size;                         /* Size in bytes of one frame */
 161
 162     vlc_bool_t b_chan_reorder;              /* do we need channel reordering */
 163     int pi_chan_table[AOUT_CHAN_MAX];
 164     uint32_t i_channel_mask;
 165     uint32_t i_bits_per_sample;
 166     uint32_t i_channels;
 167 };
 168
 169 static const uint32_t pi_channels_src[] =
 170     { AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT,
 171       AOUT_CHAN_MIDDLELEFT, AOUT_CHAN_MIDDLERIGHT,
 172       AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT,
 173       AOUT_CHAN_CENTER, AOUT_CHAN_LFE, 0 };
 174 static const uint32_t pi_channels_in[] =
 175     { SPEAKER_FRONT_LEFT, SPEAKER_FRONT_RIGHT,
 176       SPEAKER_SIDE_LEFT, SPEAKER_SIDE_RIGHT,
 177       SPEAKER_BACK_LEFT, SPEAKER_BACK_RIGHT,
 178       SPEAKER_FRONT_CENTER, SPEAKER_LOW_FREQUENCY, 0 };
 179 static const uint32_t pi_channels_out[] =
 180     { SPEAKER_FRONT_LEFT, SPEAKER_FRONT_RIGHT,
 181       SPEAKER_FRONT_CENTER, SPEAKER_LOW_FREQUENCY,
 182       SPEAKER_BACK_LEFT, SPEAKER_BACK_RIGHT,
 183       SPEAKER_SIDE_LEFT, SPEAKER_SIDE_RIGHT, 0 };
 184
 185 /*****************************************************************************
 186  * Local prototypes.
 187  *****************************************************************************/
 188 static int  OpenAudio  ( vlc_object_t * );
 189 static void CloseAudio ( vlc_object_t * );
 190 static void Play       ( aout_instance_t * );
 191
 192 /* local functions */
 193 static void Probe             ( aout_instance_t * );
 194 static int  InitDirectSound   ( aout_instance_t * );
 195 static int  CreateDSBuffer    ( aout_instance_t *, int, int, int, int, int, vlc_bool_t );
 196 static int  CreateDSBufferPCM ( aout_instance_t *, int*, int, int, int, vlc_bool_t );
 197 static void DestroyDSBuffer   ( aout_instance_t * );
 198 static void DirectSoundThread ( notification_thread_t * );
 199 static int  FillBuffer        ( aout_instance_t *, int, aout_buffer_t * );
 200
 201 /*****************************************************************************
 202  * Module descriptor
 203  *****************************************************************************/
 204 #define DEVICE_TEXT N_("Output device")
 205 #define DEVICE_LONGTEXT N_( \
 206     "DirectX device number: 0 default device, 1..N device by number" \
 207     "(Note that the default device appears as 0 AND another number)." )
 208 #define FLOAT_TEXT N_("Use float32 output")
 209 #define FLOAT_LONGTEXT N_( \
 210     "The option allows you to enable or disable the high-quality float32 " \
 211     "audio output mode (which is not well supported by some soundcards)." )
 212
 213 vlc_module_begin();
 214     set_description( _("DirectX audio output") );
 215     set_shortname( "DirectX" );
 216     set_capability( "audio output", 100 );
 217     set_category( CAT_AUDIO );
 218     set_subcategory( SUBCAT_AUDIO_AOUT );
 219     add_shortcut( "directx" );
 220     add_integer( "directx-audio-device", 0, NULL, DEVICE_TEXT,
 221                  DEVICE_LONGTEXT, VLC_TRUE );
 222     add_bool( "directx-audio-float32", 0, 0, FLOAT_TEXT,
 223               FLOAT_LONGTEXT, VLC_TRUE );
 224     set_callbacks( OpenAudio, CloseAudio );
 225 vlc_module_end();
 226
 227 /*****************************************************************************
 228  * OpenAudio: open the audio device
 229  *****************************************************************************
 230  * This function opens and setups Direct Sound.
 231  *****************************************************************************/
 232 static int OpenAudio( vlc_object_t *p_this )
 233 {
 234     aout_instance_t * p_aout = (aout_instance_t *)p_this;
 235     vlc_value_t val;
 236
 237     msg_Dbg( p_aout, "OpenAudio" );
 238
 239    /* Allocate structure */
 240     p_aout->output.p_sys = malloc( sizeof( aout_sys_t ) );
 241     if( p_aout->output.p_sys == NULL )
 242     {
 243         msg_Err( p_aout, "out of memory" );
 244         return VLC_ENOMEM;
 245     }
 246
 247     /* Initialize some variables */
 248     p_aout->output.p_sys->p_dsobject = NULL;
 249     p_aout->output.p_sys->p_dsbuffer = NULL;
 250     p_aout->output.p_sys->p_notif = NULL;
 251     p_aout->output.p_sys->b_playing = 0;
 252
 253     p_aout->output.pf_play = Play;
 254     aout_VolumeSoftInit( p_aout );
 255
 256     /* Retrieve config values */
 257     var_Create( p_aout, "directx-audio-float32",
 258                 VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 259     var_Create( p_aout, "directx-audio-device",
 260                 VLC_VAR_INTEGER|VLC_VAR_DOINHERIT );
 261     var_Get( p_aout, "directx-audio-device", &val );
 262     p_aout->output.p_sys->i_device_id = val.i_int;
 263     p_aout->output.p_sys->p_device_guid = 0;
 264
 265     /* Initialise DirectSound */
 266     if( InitDirectSound( p_aout ) )
 267     {
 268         msg_Err( p_aout, "cannot initialize DirectSound" );
 269         goto error;
 270     }
 271
 272     if( var_Type( p_aout, "audio-device" ) == 0 )
 273     {
 274         Probe( p_aout );
 275     }
 276
 277     if( var_Get( p_aout, "audio-device", &val ) < 0 )
 278     {
 279         /* Probe() has failed. */
 280         goto error;
 281     }
 282
 283     /* Open the device */
 284     if( val.i_int == AOUT_VAR_SPDIF )
 285     {
 286         p_aout->output.output.i_format = VLC_FOURCC('s','p','d','i');
 287
 288         /* Calculate the frame size in bytes */
 289         p_aout->output.i_nb_samples = A52_FRAME_NB;
 290         p_aout->output.output.i_bytes_per_frame = AOUT_SPDIF_SIZE;
 291         p_aout->output.output.i_frame_length = A52_FRAME_NB;
 292         p_aout->output.p_sys->i_frame_size =
 293             p_aout->output.output.i_bytes_per_frame;
 294
 295         if( CreateDSBuffer( p_aout, VLC_FOURCC('s','p','d','i'),
 296                             p_aout->output.output.i_physical_channels,
 297                             aout_FormatNbChannels( &p_aout->output.output ),
 298                             p_aout->output.output.i_rate,
 299                             p_aout->output.p_sys->i_frame_size, VLC_FALSE )
 300             != VLC_SUCCESS )
 301         {
 302             msg_Err( p_aout, "cannot open directx audio device" );
 303             free( p_aout->output.p_sys );
 304             return VLC_EGENERIC;
 305         }
 306
 307         aout_VolumeNoneInit( p_aout );
 308     }
 309     else
 310     {
 311         if( val.i_int == AOUT_VAR_5_1 )
 312         {
 313             p_aout->output.output.i_physical_channels
 314                 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
 315                    | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT
 316                    | AOUT_CHAN_LFE;
 317         }
 318         else if( val.i_int == AOUT_VAR_3F2R )
 319         {
 320             p_aout->output.output.i_physical_channels
 321                 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
 322                    | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
 323         }
 324         else if( val.i_int == AOUT_VAR_2F2R )
 325         {
 326             p_aout->output.output.i_physical_channels
 327                 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT
 328                    | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
 329         }
 330         else if( val.i_int == AOUT_VAR_MONO )
 331         {
 332             p_aout->output.output.i_physical_channels = AOUT_CHAN_CENTER;
 333         }
 334         else
 335         {
 336             p_aout->output.output.i_physical_channels
 337                 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
 338         }
 339
 340         if( CreateDSBufferPCM( p_aout, &p_aout->output.output.i_format,
 341                                p_aout->output.output.i_physical_channels,
 342                                aout_FormatNbChannels( &p_aout->output.output ),
 343                                p_aout->output.output.i_rate, VLC_FALSE )
 344             != VLC_SUCCESS )
 345         {
 346             msg_Err( p_aout, "cannot open directx audio device" );
 347             free( p_aout->output.p_sys );
 348             return VLC_EGENERIC;
 349         }
 350
 351         /* Calculate the frame size in bytes */
 352         p_aout->output.i_nb_samples = FRAME_SIZE;
 353         aout_FormatPrepare( &p_aout->output.output );
 354         aout_VolumeSoftInit( p_aout );
 355     }
 356
 357     /* Now we need to setup our DirectSound play notification structure */
 358     p_aout->output.p_sys->p_notif =
 359         vlc_object_create( p_aout, sizeof(notification_thread_t) );
 360     p_aout->output.p_sys->p_notif->p_aout = p_aout;
 361
 362     p_aout->output.p_sys->p_notif->event = CreateEvent( 0, FALSE, FALSE, 0 );
 363     p_aout->output.p_sys->p_notif->i_frame_size =
 364         p_aout->output.p_sys->i_frame_size;
 365
 366     /* then launch the notification thread */
 367     msg_Dbg( p_aout, "creating DirectSoundThread" );
 368     if( vlc_thread_create( p_aout->output.p_sys->p_notif,
 369                            "DirectSound Notification Thread",
 370                            DirectSoundThread,
 371                            VLC_THREAD_PRIORITY_HIGHEST, VLC_FALSE ) )
 372     {
 373         msg_Err( p_aout, "cannot create DirectSoundThread" );
 374         CloseHandle( p_aout->output.p_sys->p_notif->event );
 375         vlc_object_destroy( p_aout->output.p_sys->p_notif );
 376         p_aout->output.p_sys->p_notif = NULL;
 377         goto error;
 378     }
 379
 380     vlc_object_attach( p_aout->output.p_sys->p_notif, p_aout );
 381
 382     return VLC_SUCCESS;
 383
 384  error:
 385     CloseAudio( VLC_OBJECT(p_aout) );
 386     return VLC_EGENERIC;
 387 }
 388
 389 /*****************************************************************************
 390  * Probe: probe the audio device for available formats and channels
 391  *****************************************************************************/
 392 static void Probe( aout_instance_t * p_aout )
 393 {
 394     vlc_value_t val, text;
 395     int i_format;
 396     unsigned int i_physical_channels;
 397     DWORD ui_speaker_config;
 398
 399     var_Create( p_aout, "audio-device", VLC_VAR_INTEGER | VLC_VAR_HASCHOICE );
 400     text.psz_string = _("Audio Device");
 401     var_Change( p_aout, "audio-device", VLC_VAR_SETTEXT, &text, NULL );
 402
 403     /* Test for 5.1 support */
 404     i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
 405                           AOUT_CHAN_CENTER | AOUT_CHAN_REARLEFT |
 406                           AOUT_CHAN_REARRIGHT | AOUT_CHAN_LFE;
 407     if( p_aout->output.output.i_physical_channels == i_physical_channels )
 408     {
 409         if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 6,
 410                                p_aout->output.output.i_rate, VLC_TRUE )
 411             == VLC_SUCCESS )
 412         {
 413             val.i_int = AOUT_VAR_5_1;
 414             text.psz_string = "5.1";
 415             var_Change( p_aout, "audio-device",
 416                         VLC_VAR_ADDCHOICE, &val, &text );
 417             msg_Dbg( p_aout, "device supports 5.1 channels" );
 418         }
 419     }
 420
 421     /* Test for 3 Front 2 Rear support */
 422     i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
 423                           AOUT_CHAN_CENTER | AOUT_CHAN_REARLEFT |
 424                           AOUT_CHAN_REARRIGHT;
 425     if( p_aout->output.output.i_physical_channels == i_physical_channels )
 426     {
 427         if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 5,
 428                                p_aout->output.output.i_rate, VLC_TRUE )
 429             == VLC_SUCCESS )
 430         {
 431             val.i_int = AOUT_VAR_3F2R;
 432             text.psz_string = N_("3 Front 2 Rear");
 433             var_Change( p_aout, "audio-device",
 434                         VLC_VAR_ADDCHOICE, &val, &text );
 435             msg_Dbg( p_aout, "device supports 5 channels" );
 436         }
 437     }
 438
 439     /* Test for 2 Front 2 Rear support */
 440     i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
 441                           AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
 442     if( ( p_aout->output.output.i_physical_channels & i_physical_channels )
 443         == i_physical_channels )
 444     {
 445         if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 4,
 446                                p_aout->output.output.i_rate, VLC_TRUE )
 447             == VLC_SUCCESS )
 448         {
 449             val.i_int = AOUT_VAR_2F2R;
 450             text.psz_string = N_("2 Front 2 Rear");
 451             var_Change( p_aout, "audio-device",
 452                         VLC_VAR_ADDCHOICE, &val, &text );
 453             msg_Dbg( p_aout, "device supports 4 channels" );
 454         }
 455     }
 456
 457     /* Test for stereo support */
 458     i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
 459     if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 2,
 460                            p_aout->output.output.i_rate, VLC_TRUE )
 461         == VLC_SUCCESS )
 462     {
 463         val.i_int = AOUT_VAR_STEREO;
 464         text.psz_string = N_("Stereo");
 465         var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
 466         var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
 467         msg_Dbg( p_aout, "device supports 2 channels" );
 468     }
 469
 470     /* Test for mono support */
 471     i_physical_channels = AOUT_CHAN_CENTER;
 472     if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 1,
 473                            p_aout->output.output.i_rate, VLC_TRUE )
 474         == VLC_SUCCESS )
 475     {
 476         val.i_int = AOUT_VAR_MONO;
 477         text.psz_string = N_("Mono");
 478         var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
 479         msg_Dbg( p_aout, "device supports 1 channel" );
 480     }
 481
 482     /* Check the speaker configuration to determine which channel config should
 483      * be the default */
 484     if FAILED( IDirectSound_GetSpeakerConfig( p_aout->output.p_sys->p_dsobject,
 485                                               &ui_speaker_config ) )
 486     {
 487         ui_speaker_config = DSSPEAKER_STEREO;
 488     }
 489     switch( DSSPEAKER_CONFIG(ui_speaker_config) )
 490     {
 491     case DSSPEAKER_5POINT1:
 492         val.i_int = AOUT_VAR_5_1;
 493         break;
 494     case DSSPEAKER_QUAD:
 495         val.i_int = AOUT_VAR_2F2R;
 496         break;
 497 #if 0 /* Lots of people just get their settings wrong and complain that
 498        * this is a problem with VLC so just don't ever set mono by default. */
 499     case DSSPEAKER_MONO:
 500         val.i_int = AOUT_VAR_MONO;
 501         break;
 502 #endif
 503     case DSSPEAKER_SURROUND:
 504     case DSSPEAKER_STEREO:
 505     default:
 506         val.i_int = AOUT_VAR_STEREO;
 507         break;
 508     }
 509     var_Set( p_aout, "audio-device", val );
 510
 511     /* Test for SPDIF support */
 512     if ( AOUT_FMT_NON_LINEAR( &p_aout->output.output ) )
 513     {
 514         if( CreateDSBuffer( p_aout, VLC_FOURCC('s','p','d','i'),
 515                             p_aout->output.output.i_physical_channels,
 516                             aout_FormatNbChannels( &p_aout->output.output ),
 517                             p_aout->output.output.i_rate,
 518                             AOUT_SPDIF_SIZE, VLC_TRUE )
 519             == VLC_SUCCESS )
 520         {
 521             msg_Dbg( p_aout, "device supports A/52 over S/PDIF" );
 522             val.i_int = AOUT_VAR_SPDIF;
 523             text.psz_string = N_("A/52 over S/PDIF");
 524             var_Change( p_aout, "audio-device",
 525                         VLC_VAR_ADDCHOICE, &val, &text );
 526             if( config_GetInt( p_aout, "spdif" ) )
 527                 var_Set( p_aout, "audio-device", val );
 528         }
 529     }
 530
 531     var_Change( p_aout, "audio-device", VLC_VAR_CHOICESCOUNT, &val, NULL );
 532     if( val.i_int <= 0 )
 533     {
 534         /* Probe() has failed. */
 535         var_Destroy( p_aout, "audio-device" );
 536         return;
 537     }
 538
 539     var_AddCallback( p_aout, "audio-device", aout_ChannelsRestart, NULL );
 540
 541     val.b_bool = VLC_TRUE;
 542     var_Set( p_aout, "intf-change", val );
 543 }
 544
 545 /*****************************************************************************
 546  * Play: we'll start playing the directsound buffer here because at least here
 547  *       we know the first buffer has been put in the aout fifo and we also
 548  *       know its date.
 549  *****************************************************************************/
 550 static void Play( aout_instance_t *p_aout )
 551 {
 552     if( !p_aout->output.p_sys->b_playing )
 553     {
 554         aout_buffer_t *p_buffer;
 555         int i;
 556
 557         p_aout->output.p_sys->b_playing = 1;
 558
 559         /* get the playing date of the first aout buffer */
 560         p_aout->output.p_sys->p_notif->start_date =
 561             aout_FifoFirstDate( p_aout, &p_aout->output.fifo );
 562
 563         /* fill in the first samples */
 564         for( i = 0; i < FRAMES_NUM; i++ )
 565         {
 566             p_buffer = aout_FifoPop( p_aout, &p_aout->output.fifo );
 567             if( !p_buffer ) break;
 568             FillBuffer( p_aout, i, p_buffer );
 569         }
 570
 571         /* wake up the audio output thread */
 572         SetEvent( p_aout->output.p_sys->p_notif->event );
 573     }
 574 }
 575
 576 /*****************************************************************************
 577  * CloseAudio: close the audio device
 578  *****************************************************************************/
 579 static void CloseAudio( vlc_object_t *p_this )
 580 {
 581     aout_instance_t * p_aout = (aout_instance_t *)p_this;
 582     aout_sys_t *p_sys = p_aout->output.p_sys;
 583
 584     msg_Dbg( p_aout, "closing audio device" );
 585
 586     /* kill the position notification thread, if any */
 587     if( p_sys->p_notif )
 588     {
 589         vlc_object_detach( p_sys->p_notif );
 590         vlc_object_kill( p_sys->p_notif );
 591         /* wake up the audio thread if needed */
 592         if( !p_sys->b_playing ) SetEvent( p_sys->p_notif->event );
 593
 594         vlc_thread_join( p_sys->p_notif );
 595         vlc_object_destroy( p_sys->p_notif );
 596     }
 597
 598     /* release the secondary buffer */
 599     DestroyDSBuffer( p_aout );
 600
 601     /* finally release the DirectSound object */
 602     if( p_sys->p_dsobject ) IDirectSound_Release( p_sys->p_dsobject );
 603
 604     /* free DSOUND.DLL */
 605     if( p_sys->hdsound_dll ) FreeLibrary( p_sys->hdsound_dll );
 606
 607     free( p_aout->output.p_sys->p_device_guid );
 608     free( p_sys );
 609 }
 610
 611 /*****************************************************************************
 612  * CallBackDirectSoundEnum: callback to enumerate available devices
 613  *****************************************************************************/
 614 static int CALLBACK CallBackDirectSoundEnum( LPGUID p_guid, LPCSTR psz_desc,
 615                                              LPCSTR psz_mod, LPVOID _p_aout )
 616 {
 617     aout_instance_t *p_aout = (aout_instance_t *)_p_aout;
 618
 619     msg_Dbg( p_aout, "found device: %s", psz_desc );
 620
 621     if( p_aout->output.p_sys->i_device_id == 0 && p_guid )
 622     {
 623         p_aout->output.p_sys->p_device_guid = malloc( sizeof( GUID ) );
 624         *p_aout->output.p_sys->p_device_guid = *p_guid;
 625         msg_Dbg( p_aout, "using device: %s", psz_desc );
 626     }
 627
 628     p_aout->output.p_sys->i_device_id--;
 629     return 1;
 630 }
 631
 632 /*****************************************************************************
 633  * InitDirectSound: handle all the gory details of DirectSound initialisation
 634  *****************************************************************************/
 635 static int InitDirectSound( aout_instance_t *p_aout )
 636 {
 637     HRESULT (WINAPI *OurDirectSoundCreate)(LPGUID, LPDIRECTSOUND *, LPUNKNOWN);
 638     HRESULT (WINAPI *OurDirectSoundEnumerate)(LPDSENUMCALLBACK, LPVOID);
 639
 640     p_aout->output.p_sys->hdsound_dll = LoadLibrary("DSOUND.DLL");
 641     if( p_aout->output.p_sys->hdsound_dll == NULL )
 642     {
 643         msg_Warn( p_aout, "cannot open DSOUND.DLL" );
 644         goto error;
 645     }
 646
 647     OurDirectSoundCreate = (void *)
 648         GetProcAddress( p_aout->output.p_sys->hdsound_dll,
 649                         "DirectSoundCreate" );
 650     if( OurDirectSoundCreate == NULL )
 651     {
 652         msg_Warn( p_aout, "GetProcAddress FAILED" );
 653         goto error;
 654     }
 655
 656     /* Get DirectSoundEnumerate */
 657     OurDirectSoundEnumerate = (void *)
 658        GetProcAddress( p_aout->output.p_sys->hdsound_dll,
 659                        "DirectSoundEnumerateA" );
 660     if( OurDirectSoundEnumerate )
 661     {
 662         /* Attempt enumeration */
 663         if( FAILED( OurDirectSoundEnumerate( CallBackDirectSoundEnum,
 664                                              p_aout ) ) )
 665         {
 666             msg_Dbg( p_aout, "enumeration of DirectSound devices failed" );
 667         }
 668     }
 669
 670     /* Create the direct sound object */
 671     if FAILED( OurDirectSoundCreate( p_aout->output.p_sys->p_device_guid,
 672                                      &p_aout->output.p_sys->p_dsobject,
 673                                      NULL ) )
 674     {
 675         msg_Warn( p_aout, "cannot create a direct sound device" );
 676         goto error;
 677     }
 678
 679     /* Set DirectSound Cooperative level, ie what control we want over Windows
 680      * sound device. In our case, DSSCL_EXCLUSIVE means that we can modify the
 681      * settings of the primary buffer, but also that only the sound of our
 682      * application will be hearable when it will have the focus.
 683      * !!! (this is not really working as intended yet because to set the
 684      * cooperative level you need the window handle of your application, and
 685      * I don't know of any easy way to get it. Especially since we might play
 686      * sound without any video, and so what window handle should we use ???
 687      * The hack for now is to use the Desktop window handle - it seems to be
 688      * working */
 689     if( IDirectSound_SetCooperativeLevel( p_aout->output.p_sys->p_dsobject,
 690                                           GetDesktopWindow(),
 691                                           DSSCL_EXCLUSIVE) )
 692     {
 693         msg_Warn( p_aout, "cannot set direct sound cooperative level" );
 694     }
 695
 696     return VLC_SUCCESS;
 697
 698  error:
 699     p_aout->output.p_sys->p_dsobject = NULL;
 700     if( p_aout->output.p_sys->hdsound_dll )
 701     {
 702         FreeLibrary( p_aout->output.p_sys->hdsound_dll );
 703         p_aout->output.p_sys->hdsound_dll = NULL;
 704     }
 705     return VLC_EGENERIC;
 706
 707 }
 708
 709 /*****************************************************************************
 710  * CreateDSBuffer: Creates a direct sound buffer of the required format.
 711  *****************************************************************************
 712  * This function creates the buffer we'll use to play audio.
 713  * In DirectSound there are two kinds of buffers:
 714  * - the primary buffer: which is the actual buffer that the soundcard plays
 715  * - the secondary buffer(s): these buffers are the one actually used by
 716  *    applications and DirectSound takes care of mixing them into the primary.
 717  *
 718  * Once you create a secondary buffer, you cannot change its format anymore so
 719  * you have to release the current one and create another.
 720  *****************************************************************************/
 721 static int CreateDSBuffer( aout_instance_t *p_aout, int i_format,
 722                            int i_channels, int i_nb_channels, int i_rate,
 723                            int i_bytes_per_frame, vlc_bool_t b_probe )
 724 {
 725     WAVEFORMATEXTENSIBLE waveformat;
 726     DSBUFFERDESC         dsbdesc;
 727     unsigned int         i;
 728
 729     /* First set the sound buffer format */
 730     waveformat.dwChannelMask = 0;
 731     for( i = 0; i < sizeof(pi_channels_src)/sizeof(uint32_t); i++ )
 732     {
 733         if( i_channels & pi_channels_src[i] )
 734             waveformat.dwChannelMask |= pi_channels_in[i];
 735     }
 736
 737     switch( i_format )
 738     {
 739     case VLC_FOURCC('s','p','d','i'):
 740         i_nb_channels = 2;
 741         /* To prevent channel re-ordering */
 742         waveformat.dwChannelMask = SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT;
 743         waveformat.Format.wBitsPerSample = 16;
 744         waveformat.Samples.wValidBitsPerSample =
 745             waveformat.Format.wBitsPerSample;
 746         waveformat.Format.wFormatTag = WAVE_FORMAT_DOLBY_AC3_SPDIF;
 747         waveformat.SubFormat = _KSDATAFORMAT_SUBTYPE_DOLBY_AC3_SPDIF;
 748         break;
 749
 750     case VLC_FOURCC('f','l','3','2'):
 751         waveformat.Format.wBitsPerSample = sizeof(float) * 8;
 752         waveformat.Samples.wValidBitsPerSample =
 753             waveformat.Format.wBitsPerSample;
 754         waveformat.Format.wFormatTag = WAVE_FORMAT_IEEE_FLOAT;
 755         waveformat.SubFormat = _KSDATAFORMAT_SUBTYPE_IEEE_FLOAT;
 756         break;
 757
 758     case VLC_FOURCC('s','1','6','l'):
 759         waveformat.Format.wBitsPerSample = 16;
 760         waveformat.Samples.wValidBitsPerSample =
 761             waveformat.Format.wBitsPerSample;
 762         waveformat.Format.wFormatTag = WAVE_FORMAT_PCM;
 763         waveformat.SubFormat = _KSDATAFORMAT_SUBTYPE_PCM;
 764         break;
 765     }
 766
 767     waveformat.Format.nChannels = i_nb_channels;
 768     waveformat.Format.nSamplesPerSec = i_rate;
 769     waveformat.Format.nBlockAlign =
 770         waveformat.Format.wBitsPerSample / 8 * i_nb_channels;
 771     waveformat.Format.nAvgBytesPerSec =
 772         waveformat.Format.nSamplesPerSec * waveformat.Format.nBlockAlign;
 773
 774     p_aout->output.p_sys->i_bits_per_sample = waveformat.Format.wBitsPerSample;
 775     p_aout->output.p_sys->i_channels = i_nb_channels;
 776
 777     /* Then fill in the direct sound descriptor */
 778     memset(&dsbdesc, 0, sizeof(DSBUFFERDESC));
 779     dsbdesc.dwSize = sizeof(DSBUFFERDESC);
 780     dsbdesc.dwFlags = DSBCAPS_GETCURRENTPOSITION2/* Better position accuracy */
 781                     | DSBCAPS_GLOBALFOCUS;      /* Allows background playing */
 782
 783     /* Only use the new WAVE_FORMAT_EXTENSIBLE format for multichannel audio */
 784     if( i_nb_channels <= 2 )
 785     {
 786         waveformat.Format.cbSize = 0;
 787     }
 788     else
 789     {
 790         waveformat.Format.wFormatTag = WAVE_FORMAT_EXTENSIBLE;
 791         waveformat.Format.cbSize =
 792             sizeof(WAVEFORMATEXTENSIBLE) - sizeof(WAVEFORMATEX);
 793
 794         /* Needed for 5.1 on emu101k */
 795         dsbdesc.dwFlags |= DSBCAPS_LOCHARDWARE;
 796     }
 797
 798     dsbdesc.dwBufferBytes = FRAMES_NUM * i_bytes_per_frame;   /* buffer size */
 799     dsbdesc.lpwfxFormat = (WAVEFORMATEX *)&waveformat;
 800
 801     if FAILED( IDirectSound_CreateSoundBuffer(
 802                    p_aout->output.p_sys->p_dsobject, &dsbdesc,
 803                    &p_aout->output.p_sys->p_dsbuffer, NULL) )
 804     {
 805         if( dsbdesc.dwFlags & DSBCAPS_LOCHARDWARE )
 806         {
 807             /* Try without DSBCAPS_LOCHARDWARE */
 808             dsbdesc.dwFlags &= ~DSBCAPS_LOCHARDWARE;
 809             if FAILED( IDirectSound_CreateSoundBuffer(
 810                    p_aout->output.p_sys->p_dsobject, &dsbdesc,
 811                    &p_aout->output.p_sys->p_dsbuffer, NULL) )
 812             {
 813                 return VLC_EGENERIC;
 814             }
 815             if( !b_probe )
 816                 msg_Dbg( p_aout, "couldn't use hardware sound buffer" );
 817         }
 818         else
 819         {
 820             return VLC_EGENERIC;
 821         }
 822     }
 823
 824     /* Stop here if we were just probing */
 825     if( b_probe )
 826     {
 827         IDirectSoundBuffer_Release( p_aout->output.p_sys->p_dsbuffer );
 828         p_aout->output.p_sys->p_dsbuffer = NULL;
 829         return VLC_SUCCESS;
 830     }
 831
 832     p_aout->output.p_sys->i_frame_size = i_bytes_per_frame;
 833     p_aout->output.p_sys->i_channel_mask = waveformat.dwChannelMask;
 834     p_aout->output.p_sys->b_chan_reorder =
 835         aout_CheckChannelReorder( pi_channels_in, pi_channels_out,
 836                                   waveformat.dwChannelMask, i_nb_channels,
 837                                   p_aout->output.p_sys->pi_chan_table );
 838
 839     if( p_aout->output.p_sys->b_chan_reorder )
 840     {
 841         msg_Dbg( p_aout, "channel reordering needed" );
 842     }
 843
 844     return VLC_SUCCESS;
 845 }
 846
 847 /*****************************************************************************
 848  * CreateDSBufferPCM: creates a PCM direct sound buffer.
 849  *****************************************************************************
 850  * We first try to create a WAVE_FORMAT_IEEE_FLOAT buffer if supported by
 851  * the hardware, otherwise we create a WAVE_FORMAT_PCM buffer.
 852  ****************************************************************************/
 853 static int CreateDSBufferPCM( aout_instance_t *p_aout, int *i_format,
 854                               int i_channels, int i_nb_channels, int i_rate,
 855                               vlc_bool_t b_probe )
 856 {
 857     vlc_value_t val;
 858
 859     var_Get( p_aout, "directx-audio-float32", &val );
 860
 861     /* Float32 audio samples are not supported for 5.1 output on the emu101k */
 862
 863     if( !val.b_bool || i_nb_channels > 2 ||
 864         CreateDSBuffer( p_aout, VLC_FOURCC('f','l','3','2'),
 865                         i_channels, i_nb_channels, i_rate,
 866                         FRAME_SIZE * 4 * i_nb_channels, b_probe )
 867         != VLC_SUCCESS )
 868     {
 869         if ( CreateDSBuffer( p_aout, VLC_FOURCC('s','1','6','l'),
 870                              i_channels, i_nb_channels, i_rate,
 871                              FRAME_SIZE * 2 * i_nb_channels, b_probe )
 872              != VLC_SUCCESS )
 873         {
 874             return VLC_EGENERIC;
 875         }
 876         else
 877         {
 878             *i_format = VLC_FOURCC('s','1','6','l');
 879             return VLC_SUCCESS;
 880         }
 881     }
 882     else
 883     {
 884         *i_format = VLC_FOURCC('f','l','3','2');
 885         return VLC_SUCCESS;
 886     }
 887 }
 888
 889 /*****************************************************************************
 890  * DestroyDSBuffer
 891  *****************************************************************************
 892  * This function destroys the secondary buffer.
 893  *****************************************************************************/
 894 static void DestroyDSBuffer( aout_instance_t *p_aout )
 895 {
 896     if( p_aout->output.p_sys->p_dsbuffer )
 897     {
 898         IDirectSoundBuffer_Release( p_aout->output.p_sys->p_dsbuffer );
 899         p_aout->output.p_sys->p_dsbuffer = NULL;
 900     }
 901 }
 902
 903 /*****************************************************************************
 904  * FillBuffer: Fill in one of the direct sound frame buffers.
 905  *****************************************************************************
 906  * Returns VLC_SUCCESS on success.
 907  *****************************************************************************/
 908 static int FillBuffer( aout_instance_t *p_aout, int i_frame,
 909                        aout_buffer_t *p_buffer )
 910 {
 911     notification_thread_t *p_notif = p_aout->output.p_sys->p_notif;
 912     aout_sys_t *p_sys = p_aout->output.p_sys;
 913     void *p_write_position, *p_wrap_around;
 914     long l_bytes1, l_bytes2;
 915     HRESULT dsresult;
 916
 917     /* Before copying anything, we have to lock the buffer */
 918     dsresult = IDirectSoundBuffer_Lock(
 919                 p_sys->p_dsbuffer,                              /* DS buffer */
 920                 i_frame * p_notif->i_frame_size,             /* Start offset */
 921                 p_notif->i_frame_size,                    /* Number of bytes */
 922                 &p_write_position,                  /* Address of lock start */
 923                 &l_bytes1,       /* Count of bytes locked before wrap around */
 924                 &p_wrap_around,            /* Buffer adress (if wrap around) */
 925                 &l_bytes2,               /* Count of bytes after wrap around */
 926                 0 );                                                /* Flags */
 927     if( dsresult == DSERR_BUFFERLOST )
 928     {
 929         IDirectSoundBuffer_Restore( p_sys->p_dsbuffer );
 930         dsresult = IDirectSoundBuffer_Lock(
 931                                p_sys->p_dsbuffer,
 932                                i_frame * p_notif->i_frame_size,
 933                                p_notif->i_frame_size,
 934                                &p_write_position,
 935                                &l_bytes1,
 936                                &p_wrap_around,
 937                                &l_bytes2,
 938                                0 );
 939     }
 940     if( dsresult != DS_OK )
 941     {
 942         msg_Warn( p_notif, "cannot lock buffer" );
 943         if( p_buffer ) aout_BufferFree( p_buffer );
 944         return VLC_EGENERIC;
 945     }
 946
 947     if( p_buffer == NULL )
 948     {
 949         memset( p_write_position, 0, l_bytes1 );
 950     }
 951     else
 952     {
 953         if( p_sys->b_chan_reorder )
 954         {
 955             /* Do the channel reordering here */
 956             aout_ChannelReorder( p_buffer->p_buffer, p_buffer->i_nb_bytes,
 957                                  p_sys->i_channels, p_sys->pi_chan_table,
 958                                  p_sys->i_bits_per_sample );
 959         }
 960
 961         p_aout->p_libvlc->pf_memcpy( p_write_position, p_buffer->p_buffer,
 962                                   l_bytes1 );
 963         aout_BufferFree( p_buffer );
 964     }
 965
 966     /* Now the data has been copied, unlock the buffer */
 967     IDirectSoundBuffer_Unlock( p_sys->p_dsbuffer, p_write_position, l_bytes1,
 968                                p_wrap_around, l_bytes2 );
 969
 970     p_notif->i_write_slot = (i_frame + 1) % FRAMES_NUM;
 971     return VLC_SUCCESS;
 972 }
 973
 974 /*****************************************************************************
 975  * DirectSoundThread: this thread will capture play notification events.
 976  *****************************************************************************
 977  * We use this thread to emulate a callback mechanism. The thread probes for
 978  * event notification and fills up the DS secondary buffer when needed.
 979  *****************************************************************************/
 980 static void DirectSoundThread( notification_thread_t *p_notif )
 981 {
 982     aout_instance_t *p_aout = p_notif->p_aout;
 983     vlc_bool_t b_sleek;
 984     mtime_t last_time;
 985     HRESULT dsresult;
 986     long l_queued = 0;
 987
 988     /* We don't want any resampling when using S/PDIF output */
 989     b_sleek = p_aout->output.output.i_format == VLC_FOURCC('s','p','d','i');
 990
 991     /* Tell the main thread that we are ready */
 992     vlc_thread_ready( p_notif );
 993
 994     msg_Dbg( p_notif, "DirectSoundThread ready" );
 995
 996     /* Wait here until Play() is called */
 997     WaitForSingleObject( p_notif->event, INFINITE );
 998
 999     if( !p_notif->b_die )
1000     {
1001         mwait( p_notif->start_date - AOUT_PTS_TOLERANCE / 2 );
1002
1003         /* start playing the buffer */
1004         dsresult = IDirectSoundBuffer_Play( p_aout->output.p_sys->p_dsbuffer,
1005                                         0,                         /* Unused */
1006                                         0,                         /* Unused */
1007                                         DSBPLAY_LOOPING );          /* Flags */
1008         if( dsresult == DSERR_BUFFERLOST )
1009         {
1010             IDirectSoundBuffer_Restore( p_aout->output.p_sys->p_dsbuffer );
1011             dsresult = IDirectSoundBuffer_Play(
1012                                             p_aout->output.p_sys->p_dsbuffer,
1013                                             0,                     /* Unused */
1014                                             0,                     /* Unused */
1015                                             DSBPLAY_LOOPING );      /* Flags */
1016         }
1017         if( dsresult != DS_OK )
1018         {
1019             msg_Err( p_aout, "cannot start playing buffer" );
1020         }
1021     }
1022     last_time = mdate();
1023
1024     while( !p_notif->b_die )
1025     {
1026         long l_read, l_free_slots;
1027         mtime_t mtime = mdate();
1028         int i;
1029
1030         /*
1031          * Fill in as much audio data as we can in our circular buffer
1032          */
1033
1034         /* Find out current play position */
1035         if FAILED( IDirectSoundBuffer_GetCurrentPosition(
1036                    p_aout->output.p_sys->p_dsbuffer, &l_read, NULL ) )
1037         {
1038             msg_Err( p_aout, "GetCurrentPosition() failed!" );
1039             l_read = 0;
1040         }
1041
1042         /* Detect underruns */
1043         if( l_queued && mtime - last_time >
1044             I64C(1000000) * l_queued / p_aout->output.output.i_rate )
1045         {
1046             msg_Dbg( p_aout, "detected underrun!" );
1047         }
1048         last_time = mtime;
1049
1050         /* Try to fill in as many frame buffers as possible */
1051         l_read /= p_aout->output.output.i_bytes_per_frame;
1052         l_queued = p_notif->i_write_slot * FRAME_SIZE - l_read;
1053         if( l_queued < 0 ) l_queued += (FRAME_SIZE * FRAMES_NUM);
1054         l_free_slots = (FRAMES_NUM * FRAME_SIZE - l_queued) / FRAME_SIZE;
1055
1056         for( i = 0; i < l_free_slots; i++ )
1057         {
1058             aout_buffer_t *p_buffer = aout_OutputNextBuffer( p_aout,
1059                 mtime + I64C(1000000) * (i * FRAME_SIZE + l_queued) /
1060                 p_aout->output.output.i_rate, b_sleek );
1061
1062             /* If there is no audio data available and we have some buffered
1063              * already, then just wait for the next time */
1064             if( !p_buffer && (i || l_queued / FRAME_SIZE) ) break;
1065
1066             if( FillBuffer( p_aout, p_notif->i_write_slot % FRAMES_NUM,
1067                             p_buffer ) != VLC_SUCCESS ) break;
1068         }
1069
1070         /* Sleep a reasonable amount of time */
1071         l_queued += (i * FRAME_SIZE);
1072         msleep( I64C(1000000) * l_queued / p_aout->output.output.i_rate / 2 );
1073     }
1074
1075     /* make sure the buffer isn't playing */
1076     IDirectSoundBuffer_Stop( p_aout->output.p_sys->p_dsbuffer );
1077
1078     /* free the event */
1079     CloseHandle( p_notif->event );
1080
1081     msg_Dbg( p_notif, "DirectSoundThread exiting" );
1082 }