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
  28
  29 #ifdef HAVE_CONFIG_H
  30 # include "config.h"
  31 #endif
  32
  33 #include <vlc_common.h>
  34 #include <vlc_plugin.h>
  35 #include <vlc_aout.h>
  36
  37 #include <windows.h>
  38 #include <mmsystem.h>
  39 #include <dsound.h>
  40
  41 #define FRAME_SIZE ((int)p_aout->output.output.i_rate/20) /* Size in samples */
  42 #define FRAMES_NUM 8                                      /* Needs to be > 3 */
  43
  44 /*****************************************************************************
  45  * DirectSound GUIDs.
  46  * Defining them here allows us to get rid of the dxguid library during
  47  * the linking stage.
  48  *****************************************************************************/
  49 #include <initguid.h>
  50
  51 /*****************************************************************************
  52  * Useful macros
  53  *****************************************************************************/
  54 #ifndef WAVE_FORMAT_IEEE_FLOAT
  55 #   define WAVE_FORMAT_IEEE_FLOAT 0x0003
  56 #endif
  57
  58 #ifndef WAVE_FORMAT_DOLBY_AC3_SPDIF
  59 #   define WAVE_FORMAT_DOLBY_AC3_SPDIF 0x0092
  60 #endif
  61
  62 #ifndef WAVE_FORMAT_EXTENSIBLE
  63 #define  WAVE_FORMAT_EXTENSIBLE   0xFFFE
  64 #endif
  65
  66 #ifndef SPEAKER_FRONT_LEFT
  67 #   define SPEAKER_FRONT_LEFT             0x1
  68 #   define SPEAKER_FRONT_RIGHT            0x2
  69 #   define SPEAKER_FRONT_CENTER           0x4
  70 #   define SPEAKER_LOW_FREQUENCY          0x8
  71 #   define SPEAKER_BACK_LEFT              0x10
  72 #   define SPEAKER_BACK_RIGHT             0x20
  73 #   define SPEAKER_FRONT_LEFT_OF_CENTER   0x40
  74 #   define SPEAKER_FRONT_RIGHT_OF_CENTER  0x80
  75 #   define SPEAKER_BACK_CENTER            0x100
  76 #   define SPEAKER_SIDE_LEFT              0x200
  77 #   define SPEAKER_SIDE_RIGHT             0x400
  78 #   define SPEAKER_TOP_CENTER             0x800
  79 #   define SPEAKER_TOP_FRONT_LEFT         0x1000
  80 #   define SPEAKER_TOP_FRONT_CENTER       0x2000
  81 #   define SPEAKER_TOP_FRONT_RIGHT        0x4000
  82 #   define SPEAKER_TOP_BACK_LEFT          0x8000
  83 #   define SPEAKER_TOP_BACK_CENTER        0x10000
  84 #   define SPEAKER_TOP_BACK_RIGHT         0x20000
  85 #   define SPEAKER_RESERVED               0x80000000
  86 #endif
  87
  88 #ifndef DSSPEAKER_DSSPEAKER_DIRECTOUT
  89 #   define DSSPEAKER_DSSPEAKER_DIRECTOUT         0x00000000
  90 #endif
  91 #ifndef DSSPEAKER_HEADPHONE
  92 #   define DSSPEAKER_HEADPHONE         0x00000001
  93 #endif
  94 #ifndef DSSPEAKER_MONO
  95 #   define DSSPEAKER_MONO              0x00000002
  96 #endif
  97 #ifndef DSSPEAKER_QUAD
  98 #   define DSSPEAKER_QUAD              0x00000003
  99 #endif
 100 #ifndef DSSPEAKER_STEREO
 101 #   define DSSPEAKER_STEREO            0x00000004
 102 #endif
 103 #ifndef DSSPEAKER_SURROUND
 104 #   define DSSPEAKER_SURROUND          0x00000005
 105 #endif
 106 #ifndef DSSPEAKER_5POINT1
 107 #   define DSSPEAKER_5POINT1           0x00000006
 108 #endif
 109 #ifndef DSSPEAKER_7POINT1
 110 #   define DSSPEAKER_7POINT1           0x00000007
 111 #endif
 112 #ifndef DSSPEAKER_7POINT1_SURROUND
 113 #   define DSSPEAKER_7POINT1_SURROUND           0x00000008
 114 #endif
 115 #ifndef DSSPEAKER_7POINT1_WIDE
 116 #   define DSSPEAKER_7POINT1_WIDE           DSSPEAKER_7POINT1
 117 #endif
 118
 119 #ifndef _WAVEFORMATEXTENSIBLE_
 120 typedef struct {
 121     WAVEFORMATEX    Format;
 122     union {
 123         WORD wValidBitsPerSample;       /* bits of precision  */
 124         WORD wSamplesPerBlock;          /* valid if wBitsPerSample==0 */
 125         WORD wReserved;                 /* If neither applies, set to zero. */
 126     } Samples;
 127     DWORD           dwChannelMask;      /* which channels are */
 128                                         /* present in stream  */
 129     GUID            SubFormat;
 130 } WAVEFORMATEXTENSIBLE, *PWAVEFORMATEXTENSIBLE;
 131 #endif
 132
 133 DEFINE_GUID( _KSDATAFORMAT_SUBTYPE_IEEE_FLOAT, WAVE_FORMAT_IEEE_FLOAT, 0x0000, 0x0010, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 );
 134 DEFINE_GUID( _KSDATAFORMAT_SUBTYPE_PCM, WAVE_FORMAT_PCM, 0x0000, 0x0010, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 );
 135 DEFINE_GUID( _KSDATAFORMAT_SUBTYPE_DOLBY_AC3_SPDIF, WAVE_FORMAT_DOLBY_AC3_SPDIF, 0x0000, 0x0010, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 );
 136
 137 /*****************************************************************************
 138  * notification_thread_t: DirectX event thread
 139  *****************************************************************************/
 140 typedef struct notification_thread_t
 141 {
 142     VLC_COMMON_MEMBERS
 143
 144     aout_instance_t *p_aout;
 145     int i_frame_size;                          /* size in bytes of one frame */
 146     int i_write_slot;       /* current write position in our circular buffer */
 147
 148     mtime_t start_date;
 149     HANDLE event;
 150
 151 } notification_thread_t;
 152
 153 /*****************************************************************************
 154  * aout_sys_t: directx audio output method descriptor
 155  *****************************************************************************
 156  * This structure is part of the audio output thread descriptor.
 157  * It describes the direct sound specific properties of an audio device.
 158  *****************************************************************************/
 159 struct aout_sys_t
 160 {
 161     HINSTANCE           hdsound_dll;      /* handle of the opened dsound dll */
 162
 163     int                 i_device_id;                 /*  user defined device */
 164     LPGUID              p_device_guid;
 165
 166     LPDIRECTSOUND       p_dsobject;              /* main Direct Sound object */
 167     LPDIRECTSOUNDBUFFER p_dsbuffer;   /* the sound buffer we use (direct sound
 168                                        * takes care of mixing all the
 169                                        * secondary buffers into the primary) */
 170
 171     notification_thread_t *p_notif;                  /* DirectSoundThread id */
 172
 173     int b_playing;                                         /* playing status */
 174
 175     int i_frame_size;                         /* Size in bytes of one frame */
 176
 177     bool b_chan_reorder;              /* do we need channel reordering */
 178     int pi_chan_table[AOUT_CHAN_MAX];
 179     uint32_t i_channel_mask;
 180     uint32_t i_bits_per_sample;
 181     uint32_t i_channels;
 182 };
 183
 184 static const uint32_t pi_channels_src[] =
 185     { AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT,
 186       AOUT_CHAN_MIDDLELEFT, AOUT_CHAN_MIDDLERIGHT,
 187       AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT,
 188       AOUT_CHAN_CENTER, AOUT_CHAN_LFE, 0 };
 189 static const uint32_t pi_channels_in[] =
 190     { SPEAKER_FRONT_LEFT, SPEAKER_FRONT_RIGHT,
 191       SPEAKER_SIDE_LEFT, SPEAKER_SIDE_RIGHT,
 192       SPEAKER_BACK_LEFT, SPEAKER_BACK_RIGHT,
 193       SPEAKER_FRONT_CENTER, SPEAKER_LOW_FREQUENCY, 0 };
 194 static const uint32_t pi_channels_out[] =
 195     { SPEAKER_FRONT_LEFT, SPEAKER_FRONT_RIGHT,
 196       SPEAKER_FRONT_CENTER, SPEAKER_LOW_FREQUENCY,
 197       SPEAKER_BACK_LEFT, SPEAKER_BACK_RIGHT,
 198       SPEAKER_SIDE_LEFT, SPEAKER_SIDE_RIGHT, 0 };
 199
 200 /*****************************************************************************
 201  * Local prototypes.
 202  *****************************************************************************/
 203 static int  OpenAudio  ( vlc_object_t * );
 204 static void CloseAudio ( vlc_object_t * );
 205 static void Play       ( aout_instance_t * );
 206
 207 /* local functions */
 208 static void Probe             ( aout_instance_t * );
 209 static int  InitDirectSound   ( aout_instance_t * );
 210 static int  CreateDSBuffer    ( aout_instance_t *, int, int, int, int, int, bool );
 211 static int  CreateDSBufferPCM ( aout_instance_t *, int*, int, int, int, bool );
 212 static void DestroyDSBuffer   ( aout_instance_t * );
 213 static void DirectSoundThread ( notification_thread_t * );
 214 static int  FillBuffer        ( aout_instance_t *, int, aout_buffer_t * );
 215
 216 /*****************************************************************************
 217  * Module descriptor
 218  *****************************************************************************/
 219 #define DEVICE_TEXT N_("Output device")
 220 #define DEVICE_LONGTEXT N_( \
 221     "DirectX device number: 0 default device, 1..N device by number" \
 222     "(Note that the default device appears as 0 AND another number)." )
 223 #define FLOAT_TEXT N_("Use float32 output")
 224 #define FLOAT_LONGTEXT N_( \
 225     "The option allows you to enable or disable the high-quality float32 " \
 226     "audio output mode (which is not well supported by some soundcards)." )
 227
 228 vlc_module_begin();
 229     set_description( N_("DirectX audio output") );
 230     set_shortname( "DirectX" );
 231     set_capability( "audio output", 100 );
 232     set_category( CAT_AUDIO );
 233     set_subcategory( SUBCAT_AUDIO_AOUT );
 234     add_shortcut( "directx" );
 235     add_integer( "directx-audio-device", 0, NULL, DEVICE_TEXT,
 236                  DEVICE_LONGTEXT, true );
 237     add_bool( "directx-audio-float32", 0, 0, FLOAT_TEXT,
 238               FLOAT_LONGTEXT, true );
 239     set_callbacks( OpenAudio, CloseAudio );
 240 vlc_module_end();
 241
 242 /*****************************************************************************
 243  * OpenAudio: open the audio device
 244  *****************************************************************************
 245  * This function opens and setups Direct Sound.
 246  *****************************************************************************/
 247 static int OpenAudio( vlc_object_t *p_this )
 248 {
 249     aout_instance_t * p_aout = (aout_instance_t *)p_this;
 250     vlc_value_t val;
 251
 252     msg_Dbg( p_aout, "OpenAudio" );
 253
 254    /* Allocate structure */
 255     p_aout->output.p_sys = malloc( sizeof( aout_sys_t ) );
 256     if( p_aout->output.p_sys == NULL )
 257         return VLC_ENOMEM;
 258
 259     /* Initialize some variables */
 260     p_aout->output.p_sys->p_dsobject = NULL;
 261     p_aout->output.p_sys->p_dsbuffer = NULL;
 262     p_aout->output.p_sys->p_notif = NULL;
 263     p_aout->output.p_sys->b_playing = 0;
 264
 265     p_aout->output.pf_play = Play;
 266     aout_VolumeSoftInit( p_aout );
 267
 268     /* Retrieve config values */
 269     var_Create( p_aout, "directx-audio-float32",
 270                 VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 271     var_Create( p_aout, "directx-audio-device",
 272                 VLC_VAR_INTEGER|VLC_VAR_DOINHERIT );
 273     var_Get( p_aout, "directx-audio-device", &val );
 274     p_aout->output.p_sys->i_device_id = val.i_int;
 275     p_aout->output.p_sys->p_device_guid = 0;
 276
 277     /* Initialise DirectSound */
 278     if( InitDirectSound( p_aout ) )
 279     {
 280         msg_Err( p_aout, "cannot initialize DirectSound" );
 281         goto error;
 282     }
 283
 284     if( var_Type( p_aout, "audio-device" ) == 0 )
 285     {
 286         Probe( p_aout );
 287     }
 288
 289     if( var_Get( p_aout, "audio-device", &val ) < 0 )
 290     {
 291         /* Probe() has failed. */
 292         goto error;
 293     }
 294
 295     /* Open the device */
 296     if( val.i_int == AOUT_VAR_SPDIF )
 297     {
 298         p_aout->output.output.i_format = VLC_FOURCC('s','p','d','i');
 299
 300         /* Calculate the frame size in bytes */
 301         p_aout->output.i_nb_samples = A52_FRAME_NB;
 302         p_aout->output.output.i_bytes_per_frame = AOUT_SPDIF_SIZE;
 303         p_aout->output.output.i_frame_length = A52_FRAME_NB;
 304         p_aout->output.p_sys->i_frame_size =
 305             p_aout->output.output.i_bytes_per_frame;
 306
 307         if( CreateDSBuffer( p_aout, VLC_FOURCC('s','p','d','i'),
 308                             p_aout->output.output.i_physical_channels,
 309                             aout_FormatNbChannels( &p_aout->output.output ),
 310                             p_aout->output.output.i_rate,
 311                             p_aout->output.p_sys->i_frame_size, false )
 312             != VLC_SUCCESS )
 313         {
 314             msg_Err( p_aout, "cannot open directx audio device" );
 315             free( p_aout->output.p_sys );
 316             return VLC_EGENERIC;
 317         }
 318
 319         aout_VolumeNoneInit( p_aout );
 320     }
 321     else
 322     {
 323         if( val.i_int == AOUT_VAR_5_1 )
 324         {
 325             p_aout->output.output.i_physical_channels
 326                 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
 327                    | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT
 328                    | AOUT_CHAN_LFE;
 329         }
 330         else if( val.i_int == AOUT_VAR_7_1 )
 331         {
 332                     p_aout->output.output.i_physical_channels
 333                         = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
 334                            | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT
 335                            | AOUT_CHAN_MIDDLELEFT | AOUT_CHAN_MIDDLERIGHT
 336                            | AOUT_CHAN_LFE;
 337         }
 338         else if( val.i_int == AOUT_VAR_3F2R )
 339         {
 340             p_aout->output.output.i_physical_channels
 341                 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
 342                    | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
 343         }
 344         else if( val.i_int == AOUT_VAR_2F2R )
 345         {
 346             p_aout->output.output.i_physical_channels
 347                 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT
 348                    | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
 349         }
 350         else if( val.i_int == AOUT_VAR_MONO )
 351         {
 352             p_aout->output.output.i_physical_channels = AOUT_CHAN_CENTER;
 353         }
 354         else
 355         {
 356             p_aout->output.output.i_physical_channels
 357                 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
 358         }
 359
 360         if( CreateDSBufferPCM( p_aout, &p_aout->output.output.i_format,
 361                                p_aout->output.output.i_physical_channels,
 362                                aout_FormatNbChannels( &p_aout->output.output ),
 363                                p_aout->output.output.i_rate, false )
 364             != VLC_SUCCESS )
 365         {
 366             msg_Err( p_aout, "cannot open directx audio device" );
 367             free( p_aout->output.p_sys );
 368             return VLC_EGENERIC;
 369         }
 370
 371         /* Calculate the frame size in bytes */
 372         p_aout->output.i_nb_samples = FRAME_SIZE;
 373         aout_FormatPrepare( &p_aout->output.output );
 374         aout_VolumeSoftInit( p_aout );
 375     }
 376
 377     /* Now we need to setup our DirectSound play notification structure */
 378     p_aout->output.p_sys->p_notif =
 379         vlc_object_create( p_aout, sizeof(notification_thread_t) );
 380     p_aout->output.p_sys->p_notif->p_aout = p_aout;
 381
 382     p_aout->output.p_sys->p_notif->event = CreateEvent( 0, FALSE, FALSE, 0 );
 383     p_aout->output.p_sys->p_notif->i_frame_size =
 384         p_aout->output.p_sys->i_frame_size;
 385
 386     /* then launch the notification thread */
 387     msg_Dbg( p_aout, "creating DirectSoundThread" );
 388     if( vlc_thread_create( p_aout->output.p_sys->p_notif,
 389                            "DirectSound Notification Thread",
 390                            DirectSoundThread,
 391                            VLC_THREAD_PRIORITY_HIGHEST, false ) )
 392     {
 393         msg_Err( p_aout, "cannot create DirectSoundThread" );
 394         CloseHandle( p_aout->output.p_sys->p_notif->event );
 395         vlc_object_release( p_aout->output.p_sys->p_notif );
 396         p_aout->output.p_sys->p_notif = NULL;
 397         goto error;
 398     }
 399
 400     vlc_object_attach( p_aout->output.p_sys->p_notif, p_aout );
 401
 402     return VLC_SUCCESS;
 403
 404  error:
 405     CloseAudio( VLC_OBJECT(p_aout) );
 406     return VLC_EGENERIC;
 407 }
 408
 409 /*****************************************************************************
 410  * Probe: probe the audio device for available formats and channels
 411  *****************************************************************************/
 412 static void Probe( aout_instance_t * p_aout )
 413 {
 414     vlc_value_t val, text;
 415     int i_format;
 416     unsigned int i_physical_channels;
 417     DWORD ui_speaker_config;
 418     bool is_default_output_set = false;
 419
 420     var_Create( p_aout, "audio-device", VLC_VAR_INTEGER | VLC_VAR_HASCHOICE );
 421     text.psz_string = _("Audio Device");
 422     var_Change( p_aout, "audio-device", VLC_VAR_SETTEXT, &text, NULL );
 423
 424     /* Test for 5.1 support */
 425     i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
 426                           AOUT_CHAN_CENTER | AOUT_CHAN_REARLEFT |
 427                           AOUT_CHAN_REARRIGHT | AOUT_CHAN_LFE;
 428     if( p_aout->output.output.i_physical_channels == i_physical_channels )
 429     {
 430         if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 6,
 431                                p_aout->output.output.i_rate, true )
 432             == VLC_SUCCESS )
 433         {
 434             val.i_int = AOUT_VAR_5_1;
 435             text.psz_string = "5.1";
 436             var_Change( p_aout, "audio-device",
 437                         VLC_VAR_ADDCHOICE, &val, &text );
 438             var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
 439             is_default_output_set = true;
 440             msg_Dbg( p_aout, "device supports 5.1 channels" );
 441         }
 442     }
 443
 444     /* Test for 7.1 support */
 445     i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
 446                              AOUT_CHAN_CENTER | AOUT_CHAN_REARLEFT |
 447                              AOUT_CHAN_MIDDLELEFT | AOUT_CHAN_MIDDLERIGHT |
 448                              AOUT_CHAN_REARRIGHT | AOUT_CHAN_LFE;
 449        if( p_aout->output.output.i_physical_channels == i_physical_channels )
 450        {
 451            if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 8,
 452                                   p_aout->output.output.i_rate, true )
 453                == VLC_SUCCESS )
 454            {
 455                val.i_int = AOUT_VAR_7_1;
 456                text.psz_string = "7.1";
 457                var_Change( p_aout, "audio-device",
 458                            VLC_VAR_ADDCHOICE, &val, &text );
 459                var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
 460                is_default_output_set = true;
 461                msg_Dbg( p_aout, "device supports 7.1 channels" );
 462            }
 463        }
 464
 465     /* Test for 3 Front 2 Rear support */
 466     i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
 467                           AOUT_CHAN_CENTER | AOUT_CHAN_REARLEFT |
 468                           AOUT_CHAN_REARRIGHT;
 469     if( p_aout->output.output.i_physical_channels == i_physical_channels )
 470     {
 471         if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 5,
 472                                p_aout->output.output.i_rate, true )
 473             == VLC_SUCCESS )
 474         {
 475             val.i_int = AOUT_VAR_3F2R;
 476             text.psz_string = N_("3 Front 2 Rear");
 477             var_Change( p_aout, "audio-device",
 478                         VLC_VAR_ADDCHOICE, &val, &text );
 479             if(!is_default_output_set)
 480             {
 481                 var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
 482                 is_default_output_set = true;
 483             }
 484             msg_Dbg( p_aout, "device supports 5 channels" );
 485         }
 486     }
 487
 488     /* Test for 2 Front 2 Rear support */
 489     i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
 490                           AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
 491     if( ( p_aout->output.output.i_physical_channels & i_physical_channels )
 492         == i_physical_channels )
 493     {
 494         if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 4,
 495                                p_aout->output.output.i_rate, true )
 496             == VLC_SUCCESS )
 497         {
 498             val.i_int = AOUT_VAR_2F2R;
 499             text.psz_string = N_("2 Front 2 Rear");
 500             var_Change( p_aout, "audio-device",
 501                         VLC_VAR_ADDCHOICE, &val, &text );
 502             if(!is_default_output_set)
 503             {
 504                 var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
 505                 is_default_output_set = true;
 506             }
 507             msg_Dbg( p_aout, "device supports 4 channels" );
 508         }
 509     }
 510
 511     /* Test for stereo support */
 512     i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
 513     if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 2,
 514                            p_aout->output.output.i_rate, true )
 515         == VLC_SUCCESS )
 516     {
 517         val.i_int = AOUT_VAR_STEREO;
 518         text.psz_string = N_("Stereo");
 519         var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
 520         if(!is_default_output_set)
 521         {
 522             var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
 523             is_default_output_set = true;
 524             msg_Dbg( p_aout, "device supports 2 channels (DEFAULT!)" );
 525         }
 526         msg_Dbg( p_aout, "device supports 2 channels" );
 527     }
 528
 529     /* Test for mono support */
 530     i_physical_channels = AOUT_CHAN_CENTER;
 531     if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 1,
 532                            p_aout->output.output.i_rate, true )
 533         == VLC_SUCCESS )
 534     {
 535         val.i_int = AOUT_VAR_MONO;
 536         text.psz_string = N_("Mono");
 537         var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
 538         msg_Dbg( p_aout, "device supports 1 channel" );
 539     }
 540
 541     /* Check the speaker configuration to determine which channel config should
 542      * be the default */
 543     if FAILED( IDirectSound_GetSpeakerConfig( p_aout->output.p_sys->p_dsobject,
 544                                               &ui_speaker_config ) )
 545     {
 546         ui_speaker_config = DSSPEAKER_STEREO;
 547         msg_Dbg( p_aout, "GetSpeakerConfig failed" );
 548     }
 549     switch( DSSPEAKER_CONFIG(ui_speaker_config) )
 550     {
 551     case DSSPEAKER_7POINT1:
 552         msg_Dbg( p_aout, "Windows says your SpeakerConfig is 7.1" );
 553         val.i_int = AOUT_VAR_7_1;
 554         break;
 555     case DSSPEAKER_5POINT1:
 556         msg_Dbg( p_aout, "Windows says your SpeakerConfig is 5.1" );
 557         val.i_int = AOUT_VAR_5_1;
 558         break;
 559     case DSSPEAKER_QUAD:
 560         msg_Dbg( p_aout, "Windows says your SpeakerConfig is Quad" );
 561         val.i_int = AOUT_VAR_2F2R;
 562         break;
 563 #if 0 /* Lots of people just get their settings wrong and complain that
 564        * this is a problem with VLC so just don't ever set mono by default. */
 565     case DSSPEAKER_MONO:
 566         val.i_int = AOUT_VAR_MONO;
 567         break;
 568 #endif
 569     case DSSPEAKER_SURROUND:
 570         msg_Dbg( p_aout, "Windows says your SpeakerConfig is surround" );
 571     case DSSPEAKER_STEREO:
 572         msg_Dbg( p_aout, "Windows says your SpeakerConfig is stereo" );
 573     default:
 574         /* If nothing else is found, choose stereo output */
 575         val.i_int = AOUT_VAR_STEREO;
 576         break;
 577     }
 578     var_Set( p_aout, "audio-device", val );
 579
 580     /* Test for SPDIF support */
 581     if ( AOUT_FMT_NON_LINEAR( &p_aout->output.output ) )
 582     {
 583         if( CreateDSBuffer( p_aout, VLC_FOURCC('s','p','d','i'),
 584                             p_aout->output.output.i_physical_channels,
 585                             aout_FormatNbChannels( &p_aout->output.output ),
 586                             p_aout->output.output.i_rate,
 587                             AOUT_SPDIF_SIZE, true )
 588             == VLC_SUCCESS )
 589         {
 590             msg_Dbg( p_aout, "device supports A/52 over S/PDIF" );
 591             val.i_int = AOUT_VAR_SPDIF;
 592             text.psz_string = N_("A/52 over S/PDIF");
 593             var_Change( p_aout, "audio-device",
 594                         VLC_VAR_ADDCHOICE, &val, &text );
 595             if( config_GetInt( p_aout, "spdif" ) )
 596                 var_Set( p_aout, "audio-device", val );
 597         }
 598     }
 599
 600     var_Change( p_aout, "audio-device", VLC_VAR_CHOICESCOUNT, &val, NULL );
 601     if( val.i_int <= 0 )
 602     {
 603         /* Probe() has failed. */
 604         var_Destroy( p_aout, "audio-device" );
 605         return;
 606     }
 607
 608     var_AddCallback( p_aout, "audio-device", aout_ChannelsRestart, NULL );
 609
 610     val.b_bool = true;
 611     var_Set( p_aout, "intf-change", val );
 612 }
 613
 614 /*****************************************************************************
 615  * Play: we'll start playing the directsound buffer here because at least here
 616  *       we know the first buffer has been put in the aout fifo and we also
 617  *       know its date.
 618  *****************************************************************************/
 619 static void Play( aout_instance_t *p_aout )
 620 {
 621     if( !p_aout->output.p_sys->b_playing )
 622     {
 623         aout_buffer_t *p_buffer;
 624         int i;
 625
 626         p_aout->output.p_sys->b_playing = 1;
 627
 628         /* get the playing date of the first aout buffer */
 629         p_aout->output.p_sys->p_notif->start_date =
 630             aout_FifoFirstDate( p_aout, &p_aout->output.fifo );
 631
 632         /* fill in the first samples */
 633         for( i = 0; i < FRAMES_NUM; i++ )
 634         {
 635             p_buffer = aout_FifoPop( p_aout, &p_aout->output.fifo );
 636             if( !p_buffer ) break;
 637             FillBuffer( p_aout, i, p_buffer );
 638         }
 639
 640         /* wake up the audio output thread */
 641         SetEvent( p_aout->output.p_sys->p_notif->event );
 642     }
 643 }
 644
 645 /*****************************************************************************
 646  * CloseAudio: close the audio device
 647  *****************************************************************************/
 648 static void CloseAudio( vlc_object_t *p_this )
 649 {
 650     aout_instance_t * p_aout = (aout_instance_t *)p_this;
 651     aout_sys_t *p_sys = p_aout->output.p_sys;
 652
 653     msg_Dbg( p_aout, "closing audio device" );
 654
 655     /* kill the position notification thread, if any */
 656     if( p_sys->p_notif )
 657     {
 658         vlc_object_detach( p_sys->p_notif );
 659         vlc_object_kill( p_sys->p_notif );
 660         /* wake up the audio thread if needed */
 661         if( !p_sys->b_playing ) SetEvent( p_sys->p_notif->event );
 662
 663         vlc_thread_join( p_sys->p_notif );
 664         vlc_object_release( p_sys->p_notif );
 665     }
 666
 667     /* release the secondary buffer */
 668     DestroyDSBuffer( p_aout );
 669
 670     /* finally release the DirectSound object */
 671     if( p_sys->p_dsobject ) IDirectSound_Release( p_sys->p_dsobject );
 672
 673     /* free DSOUND.DLL */
 674     if( p_sys->hdsound_dll ) FreeLibrary( p_sys->hdsound_dll );
 675
 676     free( p_aout->output.p_sys->p_device_guid );
 677     free( p_sys );
 678 }
 679
 680 /*****************************************************************************
 681  * CallBackDirectSoundEnum: callback to enumerate available devices
 682  *****************************************************************************/
 683 static int CALLBACK CallBackDirectSoundEnum( LPGUID p_guid, LPCSTR psz_desc,
 684                                              LPCSTR psz_mod, LPVOID _p_aout )
 685 {
 686     aout_instance_t *p_aout = (aout_instance_t *)_p_aout;
 687
 688     msg_Dbg( p_aout, "found device: %s", psz_desc );
 689
 690     if( p_aout->output.p_sys->i_device_id == 0 && p_guid )
 691     {
 692         p_aout->output.p_sys->p_device_guid = malloc( sizeof( GUID ) );
 693         *p_aout->output.p_sys->p_device_guid = *p_guid;
 694         msg_Dbg( p_aout, "using device: %s", psz_desc );
 695     }
 696
 697     p_aout->output.p_sys->i_device_id--;
 698     return 1;
 699 }
 700
 701 /*****************************************************************************
 702  * InitDirectSound: handle all the gory details of DirectSound initialisation
 703  *****************************************************************************/
 704 static int InitDirectSound( aout_instance_t *p_aout )
 705 {
 706     HRESULT (WINAPI *OurDirectSoundCreate)(LPGUID, LPDIRECTSOUND *, LPUNKNOWN);
 707     HRESULT (WINAPI *OurDirectSoundEnumerate)(LPDSENUMCALLBACK, LPVOID);
 708
 709     p_aout->output.p_sys->hdsound_dll = LoadLibrary("DSOUND.DLL");
 710     if( p_aout->output.p_sys->hdsound_dll == NULL )
 711     {
 712         msg_Warn( p_aout, "cannot open DSOUND.DLL" );
 713         goto error;
 714     }
 715
 716     OurDirectSoundCreate = (void *)
 717         GetProcAddress( p_aout->output.p_sys->hdsound_dll,
 718                         "DirectSoundCreate" );
 719     if( OurDirectSoundCreate == NULL )
 720     {
 721         msg_Warn( p_aout, "GetProcAddress FAILED" );
 722         goto error;
 723     }
 724
 725     /* Get DirectSoundEnumerate */
 726     OurDirectSoundEnumerate = (void *)
 727        GetProcAddress( p_aout->output.p_sys->hdsound_dll,
 728                        "DirectSoundEnumerateA" );
 729     if( OurDirectSoundEnumerate )
 730     {
 731         /* Attempt enumeration */
 732         if( FAILED( OurDirectSoundEnumerate( CallBackDirectSoundEnum,
 733                                              p_aout ) ) )
 734         {
 735             msg_Dbg( p_aout, "enumeration of DirectSound devices failed" );
 736         }
 737     }
 738
 739     /* Create the direct sound object */
 740     if FAILED( OurDirectSoundCreate( p_aout->output.p_sys->p_device_guid,
 741                                      &p_aout->output.p_sys->p_dsobject,
 742                                      NULL ) )
 743     {
 744         msg_Warn( p_aout, "cannot create a direct sound device" );
 745         goto error;
 746     }
 747
 748     /* Set DirectSound Cooperative level, ie what control we want over Windows
 749      * sound device. In our case, DSSCL_EXCLUSIVE means that we can modify the
 750      * settings of the primary buffer, but also that only the sound of our
 751      * application will be hearable when it will have the focus.
 752      * !!! (this is not really working as intended yet because to set the
 753      * cooperative level you need the window handle of your application, and
 754      * I don't know of any easy way to get it. Especially since we might play
 755      * sound without any video, and so what window handle should we use ???
 756      * The hack for now is to use the Desktop window handle - it seems to be
 757      * working */
 758     if( IDirectSound_SetCooperativeLevel( p_aout->output.p_sys->p_dsobject,
 759                                           GetDesktopWindow(),
 760                                           DSSCL_EXCLUSIVE) )
 761     {
 762         msg_Warn( p_aout, "cannot set direct sound cooperative level" );
 763     }
 764
 765     return VLC_SUCCESS;
 766
 767  error:
 768     p_aout->output.p_sys->p_dsobject = NULL;
 769     if( p_aout->output.p_sys->hdsound_dll )
 770     {
 771         FreeLibrary( p_aout->output.p_sys->hdsound_dll );
 772         p_aout->output.p_sys->hdsound_dll = NULL;
 773     }
 774     return VLC_EGENERIC;
 775
 776 }
 777
 778 /*****************************************************************************
 779  * CreateDSBuffer: Creates a direct sound buffer of the required format.
 780  *****************************************************************************
 781  * This function creates the buffer we'll use to play audio.
 782  * In DirectSound there are two kinds of buffers:
 783  * - the primary buffer: which is the actual buffer that the soundcard plays
 784  * - the secondary buffer(s): these buffers are the one actually used by
 785  *    applications and DirectSound takes care of mixing them into the primary.
 786  *
 787  * Once you create a secondary buffer, you cannot change its format anymore so
 788  * you have to release the current one and create another.
 789  *****************************************************************************/
 790 static int CreateDSBuffer( aout_instance_t *p_aout, int i_format,
 791                            int i_channels, int i_nb_channels, int i_rate,
 792                            int i_bytes_per_frame, bool b_probe )
 793 {
 794     WAVEFORMATEXTENSIBLE waveformat;
 795     DSBUFFERDESC         dsbdesc;
 796     unsigned int         i;
 797
 798     /* First set the sound buffer format */
 799     waveformat.dwChannelMask = 0;
 800     for( i = 0; i < sizeof(pi_channels_src)/sizeof(uint32_t); i++ )
 801     {
 802         if( i_channels & pi_channels_src[i] )
 803             waveformat.dwChannelMask |= pi_channels_in[i];
 804     }
 805
 806     switch( i_format )
 807     {
 808     case VLC_FOURCC('s','p','d','i'):
 809         i_nb_channels = 2;
 810         /* To prevent channel re-ordering */
 811         waveformat.dwChannelMask = SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT;
 812         waveformat.Format.wBitsPerSample = 16;
 813         waveformat.Samples.wValidBitsPerSample =
 814             waveformat.Format.wBitsPerSample;
 815         waveformat.Format.wFormatTag = WAVE_FORMAT_DOLBY_AC3_SPDIF;
 816         waveformat.SubFormat = _KSDATAFORMAT_SUBTYPE_DOLBY_AC3_SPDIF;
 817         break;
 818
 819     case VLC_FOURCC('f','l','3','2'):
 820         waveformat.Format.wBitsPerSample = sizeof(float) * 8;
 821         waveformat.Samples.wValidBitsPerSample =
 822             waveformat.Format.wBitsPerSample;
 823         waveformat.Format.wFormatTag = WAVE_FORMAT_IEEE_FLOAT;
 824         waveformat.SubFormat = _KSDATAFORMAT_SUBTYPE_IEEE_FLOAT;
 825         break;
 826
 827     case VLC_FOURCC('s','1','6','l'):
 828         waveformat.Format.wBitsPerSample = 16;
 829         waveformat.Samples.wValidBitsPerSample =
 830             waveformat.Format.wBitsPerSample;
 831         waveformat.Format.wFormatTag = WAVE_FORMAT_PCM;
 832         waveformat.SubFormat = _KSDATAFORMAT_SUBTYPE_PCM;
 833         break;
 834     }
 835
 836     waveformat.Format.nChannels = i_nb_channels;
 837     waveformat.Format.nSamplesPerSec = i_rate;
 838     waveformat.Format.nBlockAlign =
 839         waveformat.Format.wBitsPerSample / 8 * i_nb_channels;
 840     waveformat.Format.nAvgBytesPerSec =
 841         waveformat.Format.nSamplesPerSec * waveformat.Format.nBlockAlign;
 842
 843     p_aout->output.p_sys->i_bits_per_sample = waveformat.Format.wBitsPerSample;
 844     p_aout->output.p_sys->i_channels = i_nb_channels;
 845
 846     /* Then fill in the direct sound descriptor */
 847     memset(&dsbdesc, 0, sizeof(DSBUFFERDESC));
 848     dsbdesc.dwSize = sizeof(DSBUFFERDESC);
 849     dsbdesc.dwFlags = DSBCAPS_GETCURRENTPOSITION2/* Better position accuracy */
 850                     | DSBCAPS_GLOBALFOCUS;      /* Allows background playing */
 851
 852     /* Only use the new WAVE_FORMAT_EXTENSIBLE format for multichannel audio */
 853     if( i_nb_channels <= 2 )
 854     {
 855         waveformat.Format.cbSize = 0;
 856     }
 857     else
 858     {
 859         waveformat.Format.wFormatTag = WAVE_FORMAT_EXTENSIBLE;
 860         waveformat.Format.cbSize =
 861             sizeof(WAVEFORMATEXTENSIBLE) - sizeof(WAVEFORMATEX);
 862
 863         /* Needed for 5.1 on emu101k */
 864         dsbdesc.dwFlags |= DSBCAPS_LOCHARDWARE;
 865     }
 866
 867     dsbdesc.dwBufferBytes = FRAMES_NUM * i_bytes_per_frame;   /* buffer size */
 868     dsbdesc.lpwfxFormat = (WAVEFORMATEX *)&waveformat;
 869
 870     if FAILED( IDirectSound_CreateSoundBuffer(
 871                    p_aout->output.p_sys->p_dsobject, &dsbdesc,
 872                    &p_aout->output.p_sys->p_dsbuffer, NULL) )
 873     {
 874         if( dsbdesc.dwFlags & DSBCAPS_LOCHARDWARE )
 875         {
 876             /* Try without DSBCAPS_LOCHARDWARE */
 877             dsbdesc.dwFlags &= ~DSBCAPS_LOCHARDWARE;
 878             if FAILED( IDirectSound_CreateSoundBuffer(
 879                    p_aout->output.p_sys->p_dsobject, &dsbdesc,
 880                    &p_aout->output.p_sys->p_dsbuffer, NULL) )
 881             {
 882                 return VLC_EGENERIC;
 883             }
 884             if( !b_probe )
 885                 msg_Dbg( p_aout, "couldn't use hardware sound buffer" );
 886         }
 887         else
 888         {
 889             return VLC_EGENERIC;
 890         }
 891     }
 892
 893     /* Stop here if we were just probing */
 894     if( b_probe )
 895     {
 896         IDirectSoundBuffer_Release( p_aout->output.p_sys->p_dsbuffer );
 897         p_aout->output.p_sys->p_dsbuffer = NULL;
 898         return VLC_SUCCESS;
 899     }
 900
 901     p_aout->output.p_sys->i_frame_size = i_bytes_per_frame;
 902     p_aout->output.p_sys->i_channel_mask = waveformat.dwChannelMask;
 903     p_aout->output.p_sys->b_chan_reorder =
 904         aout_CheckChannelReorder( pi_channels_in, pi_channels_out,
 905                                   waveformat.dwChannelMask, i_nb_channels,
 906                                   p_aout->output.p_sys->pi_chan_table );
 907
 908     if( p_aout->output.p_sys->b_chan_reorder )
 909     {
 910         msg_Dbg( p_aout, "channel reordering needed" );
 911     }
 912
 913     return VLC_SUCCESS;
 914 }
 915
 916 /*****************************************************************************
 917  * CreateDSBufferPCM: creates a PCM direct sound buffer.
 918  *****************************************************************************
 919  * We first try to create a WAVE_FORMAT_IEEE_FLOAT buffer if supported by
 920  * the hardware, otherwise we create a WAVE_FORMAT_PCM buffer.
 921  ****************************************************************************/
 922 static int CreateDSBufferPCM( aout_instance_t *p_aout, int *i_format,
 923                               int i_channels, int i_nb_channels, int i_rate,
 924                               bool b_probe )
 925 {
 926     vlc_value_t val;
 927
 928     var_Get( p_aout, "directx-audio-float32", &val );
 929
 930     /* Float32 audio samples are not supported for 5.1 output on the emu101k */
 931
 932     if( !val.b_bool || i_nb_channels > 2 ||
 933         CreateDSBuffer( p_aout, VLC_FOURCC('f','l','3','2'),
 934                         i_channels, i_nb_channels, i_rate,
 935                         FRAME_SIZE * 4 * i_nb_channels, b_probe )
 936         != VLC_SUCCESS )
 937     {
 938         if ( CreateDSBuffer( p_aout, VLC_FOURCC('s','1','6','l'),
 939                              i_channels, i_nb_channels, i_rate,
 940                              FRAME_SIZE * 2 * i_nb_channels, b_probe )
 941              != VLC_SUCCESS )
 942         {
 943             return VLC_EGENERIC;
 944         }
 945         else
 946         {
 947             *i_format = VLC_FOURCC('s','1','6','l');
 948             return VLC_SUCCESS;
 949         }
 950     }
 951     else
 952     {
 953         *i_format = VLC_FOURCC('f','l','3','2');
 954         return VLC_SUCCESS;
 955     }
 956 }
 957
 958 /*****************************************************************************
 959  * DestroyDSBuffer
 960  *****************************************************************************
 961  * This function destroys the secondary buffer.
 962  *****************************************************************************/
 963 static void DestroyDSBuffer( aout_instance_t *p_aout )
 964 {
 965     if( p_aout->output.p_sys->p_dsbuffer )
 966     {
 967         IDirectSoundBuffer_Release( p_aout->output.p_sys->p_dsbuffer );
 968         p_aout->output.p_sys->p_dsbuffer = NULL;
 969     }
 970 }
 971
 972 /*****************************************************************************
 973  * FillBuffer: Fill in one of the direct sound frame buffers.
 974  *****************************************************************************
 975  * Returns VLC_SUCCESS on success.
 976  *****************************************************************************/
 977 static int FillBuffer( aout_instance_t *p_aout, int i_frame,
 978                        aout_buffer_t *p_buffer )
 979 {
 980     notification_thread_t *p_notif = p_aout->output.p_sys->p_notif;
 981     aout_sys_t *p_sys = p_aout->output.p_sys;
 982     void *p_write_position, *p_wrap_around;
 983     long l_bytes1, l_bytes2;
 984     HRESULT dsresult;
 985
 986     /* Before copying anything, we have to lock the buffer */
 987     dsresult = IDirectSoundBuffer_Lock(
 988                 p_sys->p_dsbuffer,                              /* DS buffer */
 989                 i_frame * p_notif->i_frame_size,             /* Start offset */
 990                 p_notif->i_frame_size,                    /* Number of bytes */
 991                 &p_write_position,                  /* Address of lock start */
 992                 &l_bytes1,       /* Count of bytes locked before wrap around */
 993                 &p_wrap_around,            /* Buffer adress (if wrap around) */
 994                 &l_bytes2,               /* Count of bytes after wrap around */
 995                 0 );                                                /* Flags */
 996     if( dsresult == DSERR_BUFFERLOST )
 997     {
 998         IDirectSoundBuffer_Restore( p_sys->p_dsbuffer );
 999         dsresult = IDirectSoundBuffer_Lock(
1000                                p_sys->p_dsbuffer,
1001                                i_frame * p_notif->i_frame_size,
1002                                p_notif->i_frame_size,
1003                                &p_write_position,
1004                                &l_bytes1,
1005                                &p_wrap_around,
1006                                &l_bytes2,
1007                                0 );
1008     }
1009     if( dsresult != DS_OK )
1010     {
1011         msg_Warn( p_notif, "cannot lock buffer" );
1012         if( p_buffer ) aout_BufferFree( p_buffer );
1013         return VLC_EGENERIC;
1014     }
1015
1016     if( p_buffer == NULL )
1017     {
1018         memset( p_write_position, 0, l_bytes1 );
1019     }
1020     else
1021     {
1022         if( p_sys->b_chan_reorder )
1023         {
1024             /* Do the channel reordering here */
1025             aout_ChannelReorder( p_buffer->p_buffer, p_buffer->i_nb_bytes,
1026                                  p_sys->i_channels, p_sys->pi_chan_table,
1027                                  p_sys->i_bits_per_sample );
1028         }
1029
1030         vlc_memcpy( p_write_position, p_buffer->p_buffer, l_bytes1 );
1031         aout_BufferFree( p_buffer );
1032     }
1033
1034     /* Now the data has been copied, unlock the buffer */
1035     IDirectSoundBuffer_Unlock( p_sys->p_dsbuffer, p_write_position, l_bytes1,
1036                                p_wrap_around, l_bytes2 );
1037
1038     p_notif->i_write_slot = (i_frame + 1) % FRAMES_NUM;
1039     return VLC_SUCCESS;
1040 }
1041
1042 /*****************************************************************************
1043  * DirectSoundThread: this thread will capture play notification events.
1044  *****************************************************************************
1045  * We use this thread to emulate a callback mechanism. The thread probes for
1046  * event notification and fills up the DS secondary buffer when needed.
1047  *****************************************************************************/
1048 static void DirectSoundThread( notification_thread_t *p_notif )
1049 {
1050     aout_instance_t *p_aout = p_notif->p_aout;
1051     bool b_sleek;
1052     mtime_t last_time;
1053     HRESULT dsresult;
1054     long l_queued = 0;
1055
1056     /* We don't want any resampling when using S/PDIF output */
1057     b_sleek = p_aout->output.output.i_format == VLC_FOURCC('s','p','d','i');
1058
1059     /* Tell the main thread that we are ready */
1060     vlc_thread_ready( p_notif );
1061
1062     msg_Dbg( p_notif, "DirectSoundThread ready" );
1063
1064     /* Wait here until Play() is called */
1065     WaitForSingleObject( p_notif->event, INFINITE );
1066
1067     if( !p_notif->b_die )
1068     {
1069         mwait( p_notif->start_date - AOUT_PTS_TOLERANCE / 2 );
1070
1071         /* start playing the buffer */
1072         dsresult = IDirectSoundBuffer_Play( p_aout->output.p_sys->p_dsbuffer,
1073                                         0,                         /* Unused */
1074                                         0,                         /* Unused */
1075                                         DSBPLAY_LOOPING );          /* Flags */
1076         if( dsresult == DSERR_BUFFERLOST )
1077         {
1078             IDirectSoundBuffer_Restore( p_aout->output.p_sys->p_dsbuffer );
1079             dsresult = IDirectSoundBuffer_Play(
1080                                             p_aout->output.p_sys->p_dsbuffer,
1081                                             0,                     /* Unused */
1082                                             0,                     /* Unused */
1083                                             DSBPLAY_LOOPING );      /* Flags */
1084         }
1085         if( dsresult != DS_OK )
1086         {
1087             msg_Err( p_aout, "cannot start playing buffer" );
1088         }
1089     }
1090     last_time = mdate();
1091
1092     while( !p_notif->b_die )
1093     {
1094         long l_read, l_free_slots;
1095         mtime_t mtime = mdate();
1096         int i;
1097
1098         /*
1099          * Fill in as much audio data as we can in our circular buffer
1100          */
1101
1102         /* Find out current play position */
1103         if FAILED( IDirectSoundBuffer_GetCurrentPosition(
1104                    p_aout->output.p_sys->p_dsbuffer, &l_read, NULL ) )
1105         {
1106             msg_Err( p_aout, "GetCurrentPosition() failed!" );
1107             l_read = 0;
1108         }
1109
1110         /* Detect underruns */
1111         if( l_queued && mtime - last_time >
1112             INT64_C(1000000) * l_queued / p_aout->output.output.i_rate )
1113         {
1114             msg_Dbg( p_aout, "detected underrun!" );
1115         }
1116         last_time = mtime;
1117
1118         /* Try to fill in as many frame buffers as possible */
1119         l_read /= p_aout->output.output.i_bytes_per_frame;
1120         l_queued = p_notif->i_write_slot * FRAME_SIZE - l_read;
1121         if( l_queued < 0 ) l_queued += (FRAME_SIZE * FRAMES_NUM);
1122         l_free_slots = (FRAMES_NUM * FRAME_SIZE - l_queued) / FRAME_SIZE;
1123
1124         for( i = 0; i < l_free_slots; i++ )
1125         {
1126             aout_buffer_t *p_buffer = aout_OutputNextBuffer( p_aout,
1127                 mtime + INT64_C(1000000) * (i * FRAME_SIZE + l_queued) /
1128                 p_aout->output.output.i_rate, b_sleek );
1129
1130             /* If there is no audio data available and we have some buffered
1131              * already, then just wait for the next time */
1132             if( !p_buffer && (i || l_queued / FRAME_SIZE) ) break;
1133
1134             if( FillBuffer( p_aout, p_notif->i_write_slot % FRAMES_NUM,
1135                             p_buffer ) != VLC_SUCCESS ) break;
1136         }
1137
1138         /* Sleep a reasonable amount of time */
1139         l_queued += (i * FRAME_SIZE);
1140         msleep( INT64_C(1000000) * l_queued / p_aout->output.output.i_rate / 2 );
1141     }
1142
1143     /* make sure the buffer isn't playing */
1144     IDirectSoundBuffer_Stop( p_aout->output.p_sys->p_dsbuffer );
1145
1146     /* free the event */
1147     CloseHandle( p_notif->event );
1148
1149     msg_Dbg( p_notif, "DirectSoundThread exiting" );
1150 }