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_EGENERIC;
 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 = 0;
 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         if( p_sys->p_notif->b_thread )
 591         {
 592             vlc_object_kill( p_sys->p_notif );
 593
 594             /* wake up the audio thread if needed */
 595             if( !p_sys->b_playing ) SetEvent( p_sys->p_notif->event );
 596
 597             vlc_thread_join( p_sys->p_notif );
 598         }
 599         vlc_object_destroy( p_sys->p_notif );
 600     }
 601
 602     /* release the secondary buffer */
 603     DestroyDSBuffer( p_aout );
 604
 605     /* finally release the DirectSound object */
 606     if( p_sys->p_dsobject ) IDirectSound_Release( p_sys->p_dsobject );
 607
 608     /* free DSOUND.DLL */
 609     if( p_sys->hdsound_dll ) FreeLibrary( p_sys->hdsound_dll );
 610
 611     if( p_aout->output.p_sys->p_device_guid )
 612         free( p_aout->output.p_sys->p_device_guid );
 613
 614     free( p_sys );
 615 }
 616
 617 /*****************************************************************************
 618  * CallBackDirectSoundEnum: callback to enumerate available devices
 619  *****************************************************************************/
 620 static int CALLBACK CallBackDirectSoundEnum( LPGUID p_guid, LPCSTR psz_desc,
 621                                              LPCSTR psz_mod, LPVOID _p_aout )
 622 {
 623     aout_instance_t *p_aout = (aout_instance_t *)_p_aout;
 624
 625     msg_Dbg( p_aout, "found device: %s", psz_desc );
 626
 627     if( p_aout->output.p_sys->i_device_id == 0 && p_guid )
 628     {
 629         p_aout->output.p_sys->p_device_guid = malloc( sizeof( GUID ) );
 630         *p_aout->output.p_sys->p_device_guid = *p_guid;
 631         msg_Dbg( p_aout, "using device: %s", psz_desc );
 632     }
 633
 634     p_aout->output.p_sys->i_device_id--;
 635     return 1;
 636 }
 637
 638 /*****************************************************************************
 639  * InitDirectSound: handle all the gory details of DirectSound initialisation
 640  *****************************************************************************/
 641 static int InitDirectSound( aout_instance_t *p_aout )
 642 {
 643     HRESULT (WINAPI *OurDirectSoundCreate)(LPGUID, LPDIRECTSOUND *, LPUNKNOWN);
 644     HRESULT (WINAPI *OurDirectSoundEnumerate)(LPDSENUMCALLBACK, LPVOID);
 645
 646     p_aout->output.p_sys->hdsound_dll = LoadLibrary("DSOUND.DLL");
 647     if( p_aout->output.p_sys->hdsound_dll == NULL )
 648     {
 649         msg_Warn( p_aout, "cannot open DSOUND.DLL" );
 650         goto error;
 651     }
 652
 653     OurDirectSoundCreate = (void *)
 654         GetProcAddress( p_aout->output.p_sys->hdsound_dll,
 655                         "DirectSoundCreate" );
 656     if( OurDirectSoundCreate == NULL )
 657     {
 658         msg_Warn( p_aout, "GetProcAddress FAILED" );
 659         goto error;
 660     }
 661
 662     /* Get DirectSoundEnumerate */
 663     OurDirectSoundEnumerate = (void *)
 664        GetProcAddress( p_aout->output.p_sys->hdsound_dll,
 665                        "DirectSoundEnumerateA" );
 666     if( OurDirectSoundEnumerate )
 667     {
 668         /* Attempt enumeration */
 669         if( FAILED( OurDirectSoundEnumerate( CallBackDirectSoundEnum,
 670                                              p_aout ) ) )
 671         {
 672             msg_Dbg( p_aout, "enumeration of DirectSound devices failed" );
 673         }
 674     }
 675
 676     /* Create the direct sound object */
 677     if FAILED( OurDirectSoundCreate( p_aout->output.p_sys->p_device_guid,
 678                                      &p_aout->output.p_sys->p_dsobject,
 679                                      NULL ) )
 680     {
 681         msg_Warn( p_aout, "cannot create a direct sound device" );
 682         goto error;
 683     }
 684
 685     /* Set DirectSound Cooperative level, ie what control we want over Windows
 686      * sound device. In our case, DSSCL_EXCLUSIVE means that we can modify the
 687      * settings of the primary buffer, but also that only the sound of our
 688      * application will be hearable when it will have the focus.
 689      * !!! (this is not really working as intended yet because to set the
 690      * cooperative level you need the window handle of your application, and
 691      * I don't know of any easy way to get it. Especially since we might play
 692      * sound without any video, and so what window handle should we use ???
 693      * The hack for now is to use the Desktop window handle - it seems to be
 694      * working */
 695     if( IDirectSound_SetCooperativeLevel( p_aout->output.p_sys->p_dsobject,
 696                                           GetDesktopWindow(),
 697                                           DSSCL_EXCLUSIVE) )
 698     {
 699         msg_Warn( p_aout, "cannot set direct sound cooperative level" );
 700     }
 701
 702     return VLC_SUCCESS;
 703
 704  error:
 705     p_aout->output.p_sys->p_dsobject = NULL;
 706     if( p_aout->output.p_sys->hdsound_dll )
 707     {
 708         FreeLibrary( p_aout->output.p_sys->hdsound_dll );
 709         p_aout->output.p_sys->hdsound_dll = NULL;
 710     }
 711     return VLC_EGENERIC;
 712
 713 }
 714
 715 /*****************************************************************************
 716  * CreateDSBuffer: Creates a direct sound buffer of the required format.
 717  *****************************************************************************
 718  * This function creates the buffer we'll use to play audio.
 719  * In DirectSound there are two kinds of buffers:
 720  * - the primary buffer: which is the actual buffer that the soundcard plays
 721  * - the secondary buffer(s): these buffers are the one actually used by
 722  *    applications and DirectSound takes care of mixing them into the primary.
 723  *
 724  * Once you create a secondary buffer, you cannot change its format anymore so
 725  * you have to release the current one and create another.
 726  *****************************************************************************/
 727 static int CreateDSBuffer( aout_instance_t *p_aout, int i_format,
 728                            int i_channels, int i_nb_channels, int i_rate,
 729                            int i_bytes_per_frame, vlc_bool_t b_probe )
 730 {
 731     WAVEFORMATEXTENSIBLE waveformat;
 732     DSBUFFERDESC         dsbdesc;
 733     unsigned int         i;
 734
 735     /* First set the sound buffer format */
 736     waveformat.dwChannelMask = 0;
 737     for( i = 0; i < sizeof(pi_channels_src)/sizeof(uint32_t); i++ )
 738     {
 739         if( i_channels & pi_channels_src[i] )
 740             waveformat.dwChannelMask |= pi_channels_in[i];
 741     }
 742
 743     switch( i_format )
 744     {
 745     case VLC_FOURCC('s','p','d','i'):
 746         i_nb_channels = 2;
 747         /* To prevent channel re-ordering */
 748         waveformat.dwChannelMask = SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT;
 749         waveformat.Format.wBitsPerSample = 16;
 750         waveformat.Samples.wValidBitsPerSample =
 751             waveformat.Format.wBitsPerSample;
 752         waveformat.Format.wFormatTag = WAVE_FORMAT_DOLBY_AC3_SPDIF;
 753         waveformat.SubFormat = _KSDATAFORMAT_SUBTYPE_DOLBY_AC3_SPDIF;
 754         break;
 755
 756     case VLC_FOURCC('f','l','3','2'):
 757         waveformat.Format.wBitsPerSample = sizeof(float) * 8;
 758         waveformat.Samples.wValidBitsPerSample =
 759             waveformat.Format.wBitsPerSample;
 760         waveformat.Format.wFormatTag = WAVE_FORMAT_IEEE_FLOAT;
 761         waveformat.SubFormat = _KSDATAFORMAT_SUBTYPE_IEEE_FLOAT;
 762         break;
 763
 764     case VLC_FOURCC('s','1','6','l'):
 765         waveformat.Format.wBitsPerSample = 16;
 766         waveformat.Samples.wValidBitsPerSample =
 767             waveformat.Format.wBitsPerSample;
 768         waveformat.Format.wFormatTag = WAVE_FORMAT_PCM;
 769         waveformat.SubFormat = _KSDATAFORMAT_SUBTYPE_PCM;
 770         break;
 771     }
 772
 773     waveformat.Format.nChannels = i_nb_channels;
 774     waveformat.Format.nSamplesPerSec = i_rate;
 775     waveformat.Format.nBlockAlign =
 776         waveformat.Format.wBitsPerSample / 8 * i_nb_channels;
 777     waveformat.Format.nAvgBytesPerSec =
 778         waveformat.Format.nSamplesPerSec * waveformat.Format.nBlockAlign;
 779
 780     p_aout->output.p_sys->i_bits_per_sample = waveformat.Format.wBitsPerSample;
 781     p_aout->output.p_sys->i_channels = i_nb_channels;
 782
 783     /* Then fill in the direct sound descriptor */
 784     memset(&dsbdesc, 0, sizeof(DSBUFFERDESC));
 785     dsbdesc.dwSize = sizeof(DSBUFFERDESC);
 786     dsbdesc.dwFlags = DSBCAPS_GETCURRENTPOSITION2/* Better position accuracy */
 787                     | DSBCAPS_GLOBALFOCUS;      /* Allows background playing */
 788
 789     /* Only use the new WAVE_FORMAT_EXTENSIBLE format for multichannel audio */
 790     if( i_nb_channels <= 2 )
 791     {
 792         waveformat.Format.cbSize = 0;
 793     }
 794     else
 795     {
 796         waveformat.Format.wFormatTag = WAVE_FORMAT_EXTENSIBLE;
 797         waveformat.Format.cbSize =
 798             sizeof(WAVEFORMATEXTENSIBLE) - sizeof(WAVEFORMATEX);
 799
 800         /* Needed for 5.1 on emu101k */
 801         dsbdesc.dwFlags |= DSBCAPS_LOCHARDWARE;
 802     }
 803
 804     dsbdesc.dwBufferBytes = FRAMES_NUM * i_bytes_per_frame;   /* buffer size */
 805     dsbdesc.lpwfxFormat = (WAVEFORMATEX *)&waveformat;
 806
 807     if FAILED( IDirectSound_CreateSoundBuffer(
 808                    p_aout->output.p_sys->p_dsobject, &dsbdesc,
 809                    &p_aout->output.p_sys->p_dsbuffer, NULL) )
 810     {
 811         if( dsbdesc.dwFlags & DSBCAPS_LOCHARDWARE )
 812         {
 813             /* Try without DSBCAPS_LOCHARDWARE */
 814             dsbdesc.dwFlags &= ~DSBCAPS_LOCHARDWARE;
 815             if FAILED( IDirectSound_CreateSoundBuffer(
 816                    p_aout->output.p_sys->p_dsobject, &dsbdesc,
 817                    &p_aout->output.p_sys->p_dsbuffer, NULL) )
 818             {
 819                 return VLC_EGENERIC;
 820             }
 821             if( !b_probe )
 822                 msg_Dbg( p_aout, "couldn't use hardware sound buffer" );
 823         }
 824         else
 825         {
 826             return VLC_EGENERIC;
 827         }
 828     }
 829
 830     /* Stop here if we were just probing */
 831     if( b_probe )
 832     {
 833         IDirectSoundBuffer_Release( p_aout->output.p_sys->p_dsbuffer );
 834         p_aout->output.p_sys->p_dsbuffer = NULL;
 835         return VLC_SUCCESS;
 836     }
 837
 838     p_aout->output.p_sys->i_frame_size = i_bytes_per_frame;
 839     p_aout->output.p_sys->i_channel_mask = waveformat.dwChannelMask;
 840     p_aout->output.p_sys->b_chan_reorder =
 841         aout_CheckChannelReorder( pi_channels_in, pi_channels_out,
 842                                   waveformat.dwChannelMask, i_nb_channels,
 843                                   p_aout->output.p_sys->pi_chan_table );
 844
 845     if( p_aout->output.p_sys->b_chan_reorder )
 846     {
 847         msg_Dbg( p_aout, "channel reordering needed" );
 848     }
 849
 850     return VLC_SUCCESS;
 851 }
 852
 853 /*****************************************************************************
 854  * CreateDSBufferPCM: creates a PCM direct sound buffer.
 855  *****************************************************************************
 856  * We first try to create a WAVE_FORMAT_IEEE_FLOAT buffer if supported by
 857  * the hardware, otherwise we create a WAVE_FORMAT_PCM buffer.
 858  ****************************************************************************/
 859 static int CreateDSBufferPCM( aout_instance_t *p_aout, int *i_format,
 860                               int i_channels, int i_nb_channels, int i_rate,
 861                               vlc_bool_t b_probe )
 862 {
 863     vlc_value_t val;
 864
 865     var_Get( p_aout, "directx-audio-float32", &val );
 866
 867     /* Float32 audio samples are not supported for 5.1 output on the emu101k */
 868
 869     if( !val.b_bool || i_nb_channels > 2 ||
 870         CreateDSBuffer( p_aout, VLC_FOURCC('f','l','3','2'),
 871                         i_channels, i_nb_channels, i_rate,
 872                         FRAME_SIZE * 4 * i_nb_channels, b_probe )
 873         != VLC_SUCCESS )
 874     {
 875         if ( CreateDSBuffer( p_aout, VLC_FOURCC('s','1','6','l'),
 876                              i_channels, i_nb_channels, i_rate,
 877                              FRAME_SIZE * 2 * i_nb_channels, b_probe )
 878              != VLC_SUCCESS )
 879         {
 880             return VLC_EGENERIC;
 881         }
 882         else
 883         {
 884             *i_format = VLC_FOURCC('s','1','6','l');
 885             return VLC_SUCCESS;
 886         }
 887     }
 888     else
 889     {
 890         *i_format = VLC_FOURCC('f','l','3','2');
 891         return VLC_SUCCESS;
 892     }
 893 }
 894
 895 /*****************************************************************************
 896  * DestroyDSBuffer
 897  *****************************************************************************
 898  * This function destroys the secondary buffer.
 899  *****************************************************************************/
 900 static void DestroyDSBuffer( aout_instance_t *p_aout )
 901 {
 902     if( p_aout->output.p_sys->p_dsbuffer )
 903     {
 904         IDirectSoundBuffer_Release( p_aout->output.p_sys->p_dsbuffer );
 905         p_aout->output.p_sys->p_dsbuffer = NULL;
 906     }
 907 }
 908
 909 /*****************************************************************************
 910  * FillBuffer: Fill in one of the direct sound frame buffers.
 911  *****************************************************************************
 912  * Returns VLC_SUCCESS on success.
 913  *****************************************************************************/
 914 static int FillBuffer( aout_instance_t *p_aout, int i_frame,
 915                        aout_buffer_t *p_buffer )
 916 {
 917     notification_thread_t *p_notif = p_aout->output.p_sys->p_notif;
 918     aout_sys_t *p_sys = p_aout->output.p_sys;
 919     void *p_write_position, *p_wrap_around;
 920     long l_bytes1, l_bytes2;
 921     HRESULT dsresult;
 922
 923     /* Before copying anything, we have to lock the buffer */
 924     dsresult = IDirectSoundBuffer_Lock(
 925                 p_sys->p_dsbuffer,                              /* DS buffer */
 926                 i_frame * p_notif->i_frame_size,             /* Start offset */
 927                 p_notif->i_frame_size,                    /* Number of bytes */
 928                 &p_write_position,                  /* Address of lock start */
 929                 &l_bytes1,       /* Count of bytes locked before wrap around */
 930                 &p_wrap_around,            /* Buffer adress (if wrap around) */
 931                 &l_bytes2,               /* Count of bytes after wrap around */
 932                 0 );                                                /* Flags */
 933     if( dsresult == DSERR_BUFFERLOST )
 934     {
 935         IDirectSoundBuffer_Restore( p_sys->p_dsbuffer );
 936         dsresult = IDirectSoundBuffer_Lock(
 937                                p_sys->p_dsbuffer,
 938                                i_frame * p_notif->i_frame_size,
 939                                p_notif->i_frame_size,
 940                                &p_write_position,
 941                                &l_bytes1,
 942                                &p_wrap_around,
 943                                &l_bytes2,
 944                                0 );
 945     }
 946     if( dsresult != DS_OK )
 947     {
 948         msg_Warn( p_notif, "cannot lock buffer" );
 949         if( p_buffer ) aout_BufferFree( p_buffer );
 950         return VLC_EGENERIC;
 951     }
 952
 953     if( p_buffer == NULL )
 954     {
 955         memset( p_write_position, 0, l_bytes1 );
 956     }
 957     else
 958     {
 959         if( p_sys->b_chan_reorder )
 960         {
 961             /* Do the channel reordering here */
 962             aout_ChannelReorder( p_buffer->p_buffer, p_buffer->i_nb_bytes,
 963                                  p_sys->i_channels, p_sys->pi_chan_table,
 964                                  p_sys->i_bits_per_sample );
 965         }
 966
 967         p_aout->p_libvlc->pf_memcpy( p_write_position, p_buffer->p_buffer,
 968                                   l_bytes1 );
 969         aout_BufferFree( p_buffer );
 970     }
 971
 972     /* Now the data has been copied, unlock the buffer */
 973     IDirectSoundBuffer_Unlock( p_sys->p_dsbuffer, p_write_position, l_bytes1,
 974                                p_wrap_around, l_bytes2 );
 975
 976     p_notif->i_write_slot = (i_frame + 1) % FRAMES_NUM;
 977     return VLC_SUCCESS;
 978 }
 979
 980 /*****************************************************************************
 981  * DirectSoundThread: this thread will capture play notification events.
 982  *****************************************************************************
 983  * We use this thread to emulate a callback mechanism. The thread probes for
 984  * event notification and fills up the DS secondary buffer when needed.
 985  *****************************************************************************/
 986 static void DirectSoundThread( notification_thread_t *p_notif )
 987 {
 988     aout_instance_t *p_aout = p_notif->p_aout;
 989     vlc_bool_t b_sleek;
 990     mtime_t last_time;
 991     HRESULT dsresult;
 992     long l_queued = 0;
 993
 994     /* We don't want any resampling when using S/PDIF output */
 995     b_sleek = p_aout->output.output.i_format == VLC_FOURCC('s','p','d','i');
 996
 997     /* Tell the main thread that we are ready */
 998     vlc_thread_ready( p_notif );
 999
1000     msg_Dbg( p_notif, "DirectSoundThread ready" );
1001
1002     /* Wait here until Play() is called */
1003     WaitForSingleObject( p_notif->event, INFINITE );
1004
1005     if( !p_notif->b_die )
1006     {
1007         mwait( p_notif->start_date - AOUT_PTS_TOLERANCE / 2 );
1008
1009         /* start playing the buffer */
1010         dsresult = IDirectSoundBuffer_Play( p_aout->output.p_sys->p_dsbuffer,
1011                                         0,                         /* Unused */
1012                                         0,                         /* Unused */
1013                                         DSBPLAY_LOOPING );          /* Flags */
1014         if( dsresult == DSERR_BUFFERLOST )
1015         {
1016             IDirectSoundBuffer_Restore( p_aout->output.p_sys->p_dsbuffer );
1017             dsresult = IDirectSoundBuffer_Play(
1018                                             p_aout->output.p_sys->p_dsbuffer,
1019                                             0,                     /* Unused */
1020                                             0,                     /* Unused */
1021                                             DSBPLAY_LOOPING );      /* Flags */
1022         }
1023         if( dsresult != DS_OK )
1024         {
1025             msg_Err( p_aout, "cannot start playing buffer" );
1026         }
1027     }
1028     last_time = mdate();
1029
1030     while( !p_notif->b_die )
1031     {
1032         long l_read, l_free_slots;
1033         mtime_t mtime = mdate();
1034         int i;
1035
1036         /*
1037          * Fill in as much audio data as we can in our circular buffer
1038          */
1039
1040         /* Find out current play position */
1041         if FAILED( IDirectSoundBuffer_GetCurrentPosition(
1042                    p_aout->output.p_sys->p_dsbuffer, &l_read, NULL ) )
1043         {
1044             msg_Err( p_aout, "GetCurrentPosition() failed!" );
1045             l_read = 0;
1046         }
1047
1048         /* Detect underruns */
1049         if( l_queued && mtime - last_time >
1050             I64C(1000000) * l_queued / p_aout->output.output.i_rate )
1051         {
1052             msg_Dbg( p_aout, "detected underrun!" );
1053         }
1054         last_time = mtime;
1055
1056         /* Try to fill in as many frame buffers as possible */
1057         l_read /= p_aout->output.output.i_bytes_per_frame;
1058         l_queued = p_notif->i_write_slot * FRAME_SIZE - l_read;
1059         if( l_queued < 0 ) l_queued += (FRAME_SIZE * FRAMES_NUM);
1060         l_free_slots = (FRAMES_NUM * FRAME_SIZE - l_queued) / FRAME_SIZE;
1061
1062         for( i = 0; i < l_free_slots; i++ )
1063         {
1064             aout_buffer_t *p_buffer = aout_OutputNextBuffer( p_aout,
1065                 mtime + I64C(1000000) * (i * FRAME_SIZE + l_queued) /
1066                 p_aout->output.output.i_rate, b_sleek );
1067
1068             /* If there is no audio data available and we have some buffered
1069              * already, then just wait for the next time */
1070             if( !p_buffer && (i || l_queued / FRAME_SIZE) ) break;
1071
1072             if( FillBuffer( p_aout, p_notif->i_write_slot % FRAMES_NUM,
1073                             p_buffer ) != VLC_SUCCESS ) break;
1074         }
1075
1076         /* Sleep a reasonable amount of time */
1077         l_queued += (i * FRAME_SIZE);
1078         msleep( I64C(1000000) * l_queued / p_aout->output.output.i_rate / 2 );
1079     }
1080
1081     /* make sure the buffer isn't playing */
1082     IDirectSoundBuffer_Stop( p_aout->output.p_sys->p_dsbuffer );
1083
1084     /* free the event */
1085     CloseHandle( p_notif->event );
1086
1087     msg_Dbg( p_notif, "DirectSoundThread exiting" );
1088 }