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