git.sesse.net Git - vlc/blob - modules/audio_output/directx.c

   1 /*****************************************************************************
   2  * directx.c: Windows DirectX audio output method
   3  *****************************************************************************
   4  * Copyright (C) 2001-2009 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 #ifdef HAVE_CONFIG_H
  29 # include "config.h"
  30 #endif
  31
  32 #include <vlc_common.h>
  33 #include <vlc_plugin.h>
  34 #include <vlc_aout.h>
  35 #include <vlc_charset.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
 134 DEFINE_GUID( _KSDATAFORMAT_SUBTYPE_IEEE_FLOAT, WAVE_FORMAT_IEEE_FLOAT, 0x0000, 0x0010, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 );
 135 DEFINE_GUID( _KSDATAFORMAT_SUBTYPE_PCM, WAVE_FORMAT_PCM, 0x0000, 0x0010, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 );
 136 DEFINE_GUID( _KSDATAFORMAT_SUBTYPE_DOLBY_AC3_SPDIF, WAVE_FORMAT_DOLBY_AC3_SPDIF, 0x0000, 0x0010, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 );
 137
 138 /*****************************************************************************
 139  * notification_thread_t: DirectX event thread
 140  *****************************************************************************/
 141 typedef struct notification_thread_t
 142 {
 143     VLC_COMMON_MEMBERS
 144
 145     aout_instance_t *p_aout;
 146     int i_frame_size;                          /* size in bytes of one frame */
 147     int i_write_slot;       /* current write position in our circular buffer */
 148
 149     mtime_t start_date;
 150     HANDLE event;
 151
 152 } notification_thread_t;
 153
 154 /*****************************************************************************
 155  * aout_sys_t: directx audio output method descriptor
 156  *****************************************************************************
 157  * This structure is part of the audio output thread descriptor.
 158  * It describes the direct sound specific properties of an audio device.
 159  *****************************************************************************/
 160 struct aout_sys_t
 161 {
 162     HINSTANCE           hdsound_dll;      /* handle of the opened dsound dll */
 163
 164     char *              psz_device;         /* user defined device name */
 165     LPGUID              p_device_guid;
 166
 167     LPDIRECTSOUND       p_dsobject;              /* main Direct Sound object */
 168     LPDIRECTSOUNDBUFFER p_dsbuffer;   /* the sound buffer we use (direct sound
 169                                        * takes care of mixing all the
 170                                        * secondary buffers into the primary) */
 171
 172     notification_thread_t *p_notif;                  /* DirectSoundThread id */
 173
 174     int b_playing;                                         /* playing status */
 175
 176     int i_frame_size;                         /* Size in bytes of one frame */
 177
 178     int i_speaker_setup;                 /* Speaker setup override */
 179
 180     bool b_chan_reorder;              /* do we need channel reordering */
 181     int pi_chan_table[AOUT_CHAN_MAX];
 182     uint32_t i_channel_mask;
 183     uint32_t i_bits_per_sample;
 184     uint32_t i_channels;
 185 };
 186
 187 static const uint32_t pi_channels_src[] =
 188     { AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT,
 189       AOUT_CHAN_MIDDLELEFT, AOUT_CHAN_MIDDLERIGHT,
 190       AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT, AOUT_CHAN_REARCENTER,
 191       AOUT_CHAN_CENTER, AOUT_CHAN_LFE, 0 };
 192 static const uint32_t pi_channels_in[] =
 193     { SPEAKER_FRONT_LEFT, SPEAKER_FRONT_RIGHT,
 194       SPEAKER_SIDE_LEFT, SPEAKER_SIDE_RIGHT,
 195       SPEAKER_BACK_LEFT, SPEAKER_BACK_RIGHT, SPEAKER_BACK_CENTER,
 196       SPEAKER_FRONT_CENTER, SPEAKER_LOW_FREQUENCY, 0 };
 197 static const uint32_t pi_channels_out[] =
 198     { SPEAKER_FRONT_LEFT, SPEAKER_FRONT_RIGHT,
 199       SPEAKER_FRONT_CENTER, SPEAKER_LOW_FREQUENCY,
 200       SPEAKER_BACK_LEFT, SPEAKER_BACK_RIGHT,
 201       SPEAKER_BACK_CENTER,
 202       SPEAKER_SIDE_LEFT, SPEAKER_SIDE_RIGHT, 0 };
 203
 204 /*****************************************************************************
 205  * Local prototypes.
 206  *****************************************************************************/
 207 static int  OpenAudio  ( vlc_object_t * );
 208 static void CloseAudio ( vlc_object_t * );
 209 static void Play       ( aout_instance_t * );
 210
 211 /* local functions */
 212 static void Probe             ( aout_instance_t * );
 213 static int  InitDirectSound   ( aout_instance_t * );
 214 static int  CreateDSBuffer    ( aout_instance_t *, int, int, int, int, int, bool );
 215 static int  CreateDSBufferPCM ( aout_instance_t *, vlc_fourcc_t*, int, int, int, bool );
 216 static void DestroyDSBuffer   ( aout_instance_t * );
 217 static void* DirectSoundThread( vlc_object_t * );
 218 static int  FillBuffer        ( aout_instance_t *, int, aout_buffer_t * );
 219
 220 static int ReloadDirectXDevices( vlc_object_t *, char const *,
 221                                 vlc_value_t, vlc_value_t, void * );
 222
 223 /* Speaker setup override options list */
 224 static const char *const speaker_list[] = { "Windows default", "Mono", "Stereo",
 225                                             "Quad", "5.1", "7.1" };
 226 static const char *const ppsz_adev[] = {"default",  };
 227 static const char *const ppsz_adev_text[] = {"default", };
 228
 229 /*****************************************************************************
 230  * Module descriptor
 231  *****************************************************************************/
 232 #define DEVICE_TEXT N_("Output device")
 233 #define DEVICE_LONGTEXT N_("Select your audio output device")
 234 #define FLOAT_TEXT N_("Use float32 output")
 235 #define FLOAT_LONGTEXT N_( \
 236     "The option allows you to enable or disable the high-quality float32 " \
 237     "audio output mode (which is not well supported by some soundcards)." )
 238 #define SPEAKER_TEXT N_("Speaker configuration")
 239 #define SPEAKER_LONGTEXT N_("Select speaker configuration you want to use. " \
 240     "This option doesn't upmix! So NO e.g. Stereo -> 5.1 conversion." )
 241
 242 vlc_module_begin ()
 243     set_description( N_("DirectX audio output") )
 244     set_shortname( "DirectX" )
 245     set_capability( "audio output", 100 )
 246     set_category( CAT_AUDIO )
 247     set_subcategory( SUBCAT_AUDIO_AOUT )
 248     add_shortcut( "directx" )
 249     add_string( "directx-audio-device-name", "default", NULL,
 250              DEVICE_TEXT, DEVICE_LONGTEXT, false )
 251     change_string_list( ppsz_adev, ppsz_adev_text, ReloadDirectXDevices )
 252     change_action_add( ReloadDirectXDevices, N_("Refresh list") )
 253     add_bool( "directx-audio-float32", false, NULL, FLOAT_TEXT,
 254               FLOAT_LONGTEXT, true )
 255     add_string( "directx-audio-speaker", "Windows default", NULL,
 256                  SPEAKER_TEXT, SPEAKER_LONGTEXT, true )
 257         change_string_list( speaker_list, 0, 0 )
 258         change_need_restart ()
 259
 260     set_callbacks( OpenAudio, CloseAudio )
 261 vlc_module_end ()
 262
 263 /*****************************************************************************
 264  * OpenAudio: open the audio device
 265  *****************************************************************************
 266  * This function opens and setups Direct Sound.
 267  *****************************************************************************/
 268 static int OpenAudio( vlc_object_t *p_this )
 269 {
 270     aout_instance_t * p_aout = (aout_instance_t *)p_this;
 271     vlc_value_t val;
 272     char * psz_speaker;
 273     int i = 0;
 274
 275     const char * const * ppsz_compare = speaker_list;
 276
 277     msg_Dbg( p_aout, "OpenAudio" );
 278
 279    /* Allocate structure */
 280     p_aout->output.p_sys = malloc( sizeof( aout_sys_t ) );
 281     if( p_aout->output.p_sys == NULL )
 282         return VLC_ENOMEM;
 283
 284     /* Initialize some variables */
 285     p_aout->output.p_sys->p_dsobject = NULL;
 286     p_aout->output.p_sys->p_dsbuffer = NULL;
 287     p_aout->output.p_sys->p_notif = NULL;
 288     p_aout->output.p_sys->b_playing = 0;
 289
 290     p_aout->output.pf_play = Play;
 291     aout_VolumeSoftInit( p_aout );
 292
 293     /* Retrieve config values */
 294     var_Create( p_aout, "directx-audio-float32",
 295                 VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 296     psz_speaker = var_CreateGetString( p_aout, "directx-audio-speaker" );
 297
 298     while ( *ppsz_compare != NULL )
 299     {
 300         if ( !strncmp( *ppsz_compare, psz_speaker, strlen(*ppsz_compare) ) )
 301         {
 302             break;
 303         }
 304         ppsz_compare++; i++;
 305     }
 306
 307     if ( *ppsz_compare == NULL )
 308     {
 309         msg_Err( p_aout, "(%s) isn't valid speaker setup option",
 310                  psz_speaker );
 311         msg_Err( p_aout, "Defaulting to Windows default speaker config");
 312         i = 0;
 313     }
 314     free( psz_speaker );
 315     p_aout->output.p_sys->i_speaker_setup = i;
 316
 317     p_aout->output.p_sys->p_device_guid = 0;
 318
 319     /* Initialise DirectSound */
 320     if( InitDirectSound( p_aout ) )
 321     {
 322         msg_Err( p_aout, "cannot initialize DirectSound" );
 323         goto error;
 324     }
 325
 326     if( var_Type( p_aout, "audio-device" ) == 0 )
 327     {
 328         Probe( p_aout );
 329     }
 330
 331     if( var_Get( p_aout, "audio-device", &val ) < 0 )
 332     {
 333         /* Probe() has failed. */
 334         goto error;
 335     }
 336
 337     /* Open the device */
 338     if( val.i_int == AOUT_VAR_SPDIF )
 339     {
 340         p_aout->output.output.i_format = VLC_CODEC_SPDIFL;
 341
 342         /* Calculate the frame size in bytes */
 343         p_aout->output.i_nb_samples = A52_FRAME_NB;
 344         p_aout->output.output.i_bytes_per_frame = AOUT_SPDIF_SIZE;
 345         p_aout->output.output.i_frame_length = A52_FRAME_NB;
 346         p_aout->output.p_sys->i_frame_size =
 347             p_aout->output.output.i_bytes_per_frame;
 348
 349         if( CreateDSBuffer( p_aout, VLC_CODEC_SPDIFL,
 350                             p_aout->output.output.i_physical_channels,
 351                             aout_FormatNbChannels( &p_aout->output.output ),
 352                             p_aout->output.output.i_rate,
 353                             p_aout->output.p_sys->i_frame_size, false )
 354             != VLC_SUCCESS )
 355         {
 356             msg_Err( p_aout, "cannot open directx audio device" );
 357             free( p_aout->output.p_sys );
 358             return VLC_EGENERIC;
 359         }
 360
 361         aout_VolumeNoneInit( p_aout );
 362     }
 363     else
 364     {
 365         if( val.i_int == AOUT_VAR_5_1 )
 366         {
 367             p_aout->output.output.i_physical_channels
 368                 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
 369                    | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT
 370                    | AOUT_CHAN_LFE;
 371         }
 372         else if( val.i_int == AOUT_VAR_7_1 )
 373         {
 374                     p_aout->output.output.i_physical_channels
 375                         = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
 376                            | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT
 377                            | AOUT_CHAN_MIDDLELEFT | AOUT_CHAN_MIDDLERIGHT
 378                            | AOUT_CHAN_LFE;
 379         }
 380         else if( val.i_int == AOUT_VAR_3F2R )
 381         {
 382             p_aout->output.output.i_physical_channels
 383                 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
 384                    | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
 385         }
 386         else if( val.i_int == AOUT_VAR_2F2R )
 387         {
 388             p_aout->output.output.i_physical_channels
 389                 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT
 390                    | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
 391         }
 392         else if( val.i_int == AOUT_VAR_MONO )
 393         {
 394             p_aout->output.output.i_physical_channels = AOUT_CHAN_CENTER;
 395         }
 396         else
 397         {
 398             p_aout->output.output.i_physical_channels
 399                 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
 400         }
 401
 402         if( CreateDSBufferPCM( p_aout, &p_aout->output.output.i_format,
 403                                p_aout->output.output.i_physical_channels,
 404                                aout_FormatNbChannels( &p_aout->output.output ),
 405                                p_aout->output.output.i_rate, false )
 406             != VLC_SUCCESS )
 407         {
 408             msg_Err( p_aout, "cannot open directx audio device" );
 409             free( p_aout->output.p_sys );
 410             return VLC_EGENERIC;
 411         }
 412
 413         /* Calculate the frame size in bytes */
 414         p_aout->output.i_nb_samples = FRAME_SIZE;
 415         aout_FormatPrepare( &p_aout->output.output );
 416         aout_VolumeSoftInit( p_aout );
 417     }
 418
 419     /* Now we need to setup our DirectSound play notification structure */
 420     p_aout->output.p_sys->p_notif =
 421         vlc_object_create( p_aout, sizeof(notification_thread_t) );
 422     p_aout->output.p_sys->p_notif->p_aout = p_aout;
 423
 424     p_aout->output.p_sys->p_notif->event = CreateEvent( 0, FALSE, FALSE, 0 );
 425     p_aout->output.p_sys->p_notif->i_frame_size =
 426         p_aout->output.p_sys->i_frame_size;
 427
 428     /* then launch the notification thread */
 429     msg_Dbg( p_aout, "creating DirectSoundThread" );
 430     if( vlc_thread_create( p_aout->output.p_sys->p_notif,
 431                            "DirectSound Notification Thread",
 432                            DirectSoundThread,
 433                            VLC_THREAD_PRIORITY_HIGHEST ) )
 434     {
 435         msg_Err( p_aout, "cannot create DirectSoundThread" );
 436         CloseHandle( p_aout->output.p_sys->p_notif->event );
 437         vlc_object_release( p_aout->output.p_sys->p_notif );
 438         p_aout->output.p_sys->p_notif = NULL;
 439         goto error;
 440     }
 441
 442     vlc_object_attach( p_aout->output.p_sys->p_notif, p_aout );
 443
 444     return VLC_SUCCESS;
 445
 446  error:
 447     CloseAudio( VLC_OBJECT(p_aout) );
 448     return VLC_EGENERIC;
 449 }
 450
 451 /*****************************************************************************
 452  * Probe: probe the audio device for available formats and channels
 453  *****************************************************************************/
 454 static void Probe( aout_instance_t * p_aout )
 455 {
 456     vlc_value_t val, text;
 457     vlc_fourcc_t i_format;
 458     unsigned int i_physical_channels;
 459     DWORD ui_speaker_config;
 460     bool is_default_output_set = false;
 461
 462     var_Create( p_aout, "audio-device", VLC_VAR_INTEGER | VLC_VAR_HASCHOICE );
 463     text.psz_string = _("Audio Device");
 464     var_Change( p_aout, "audio-device", VLC_VAR_SETTEXT, &text, NULL );
 465
 466     /* Test for 5.1 support */
 467     i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
 468                           AOUT_CHAN_CENTER | AOUT_CHAN_REARLEFT |
 469                           AOUT_CHAN_REARRIGHT | AOUT_CHAN_LFE;
 470     if( p_aout->output.output.i_physical_channels == i_physical_channels )
 471     {
 472         if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 6,
 473                                p_aout->output.output.i_rate, true )
 474             == VLC_SUCCESS )
 475         {
 476             val.i_int = AOUT_VAR_5_1;
 477             text.psz_string = (char*) "5.1";
 478             var_Change( p_aout, "audio-device",
 479                         VLC_VAR_ADDCHOICE, &val, &text );
 480             var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
 481             is_default_output_set = true;
 482             msg_Dbg( p_aout, "device supports 5.1 channels" );
 483         }
 484     }
 485
 486     /* Test for 7.1 support */
 487     i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
 488                              AOUT_CHAN_CENTER | AOUT_CHAN_REARLEFT |
 489                              AOUT_CHAN_MIDDLELEFT | AOUT_CHAN_MIDDLERIGHT |
 490                              AOUT_CHAN_REARRIGHT | AOUT_CHAN_LFE;
 491     if( p_aout->output.output.i_physical_channels == i_physical_channels )
 492     {
 493         if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 8,
 494                                   p_aout->output.output.i_rate, true )
 495             == VLC_SUCCESS )
 496         {
 497             val.i_int = AOUT_VAR_7_1;
 498             text.psz_string = (char*) "7.1";
 499             var_Change( p_aout, "audio-device",
 500                         VLC_VAR_ADDCHOICE, &val, &text );
 501             var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
 502             is_default_output_set = true;
 503             msg_Dbg( p_aout, "device supports 7.1 channels" );
 504         }
 505     }
 506
 507     /* Test for 3 Front 2 Rear support */
 508     i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
 509                           AOUT_CHAN_CENTER | AOUT_CHAN_REARLEFT |
 510                           AOUT_CHAN_REARRIGHT;
 511     if( p_aout->output.output.i_physical_channels == i_physical_channels )
 512     {
 513         if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 5,
 514                                p_aout->output.output.i_rate, true )
 515             == VLC_SUCCESS )
 516         {
 517             val.i_int = AOUT_VAR_3F2R;
 518             text.psz_string = _("3 Front 2 Rear");
 519             var_Change( p_aout, "audio-device",
 520                         VLC_VAR_ADDCHOICE, &val, &text );
 521             if(!is_default_output_set)
 522             {
 523                 var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
 524                 is_default_output_set = true;
 525             }
 526             msg_Dbg( p_aout, "device supports 5 channels" );
 527         }
 528     }
 529
 530     /* Test for 2 Front 2 Rear support */
 531     i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
 532                           AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
 533     if( ( p_aout->output.output.i_physical_channels & i_physical_channels )
 534         == i_physical_channels )
 535     {
 536         if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 4,
 537                                p_aout->output.output.i_rate, true )
 538             == VLC_SUCCESS )
 539         {
 540             val.i_int = AOUT_VAR_2F2R;
 541             text.psz_string = _("2 Front 2 Rear");
 542             var_Change( p_aout, "audio-device",
 543                         VLC_VAR_ADDCHOICE, &val, &text );
 544             if(!is_default_output_set)
 545             {
 546                 var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
 547                 is_default_output_set = true;
 548             }
 549             msg_Dbg( p_aout, "device supports 4 channels" );
 550         }
 551     }
 552
 553     /* Test for stereo support */
 554     i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
 555     if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 2,
 556                            p_aout->output.output.i_rate, true )
 557         == VLC_SUCCESS )
 558     {
 559         val.i_int = AOUT_VAR_STEREO;
 560         text.psz_string = _("Stereo");
 561         var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
 562         if(!is_default_output_set)
 563         {
 564             var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
 565             is_default_output_set = true;
 566             msg_Dbg( p_aout, "device supports 2 channels (DEFAULT!)" );
 567         }
 568         else msg_Dbg( p_aout, "device supports 2 channels" );
 569     }
 570
 571     /* Test for mono support */
 572     i_physical_channels = AOUT_CHAN_CENTER;
 573     if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 1,
 574                            p_aout->output.output.i_rate, true )
 575         == VLC_SUCCESS )
 576     {
 577         val.i_int = AOUT_VAR_MONO;
 578         text.psz_string = _("Mono");
 579         var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
 580         msg_Dbg( p_aout, "device supports 1 channel" );
 581     }
 582
 583     /* Check the speaker configuration to determine which channel config should
 584      * be the default */
 585     if FAILED( IDirectSound_GetSpeakerConfig( p_aout->output.p_sys->p_dsobject,
 586                                               &ui_speaker_config ) )
 587     {
 588         ui_speaker_config = DSSPEAKER_STEREO;
 589         msg_Dbg( p_aout, "GetSpeakerConfig failed" );
 590     }
 591     switch( DSSPEAKER_CONFIG(ui_speaker_config) )
 592     {
 593     case DSSPEAKER_7POINT1:
 594         msg_Dbg( p_aout, "Windows says your SpeakerConfig is 7.1" );
 595         val.i_int = AOUT_VAR_7_1;
 596         break;
 597     case DSSPEAKER_5POINT1:
 598         msg_Dbg( p_aout, "Windows says your SpeakerConfig is 5.1" );
 599         val.i_int = AOUT_VAR_5_1;
 600         break;
 601     case DSSPEAKER_QUAD:
 602         msg_Dbg( p_aout, "Windows says your SpeakerConfig is Quad" );
 603         val.i_int = AOUT_VAR_2F2R;
 604         break;
 605 #if 0 /* Lots of people just get their settings wrong and complain that
 606        * this is a problem with VLC so just don't ever set mono by default. */
 607     case DSSPEAKER_MONO:
 608         val.i_int = AOUT_VAR_MONO;
 609         break;
 610 #endif
 611     case DSSPEAKER_SURROUND:
 612         msg_Dbg( p_aout, "Windows says your SpeakerConfig is surround" );
 613     case DSSPEAKER_STEREO:
 614         msg_Dbg( p_aout, "Windows says your SpeakerConfig is stereo" );
 615     default:
 616         /* If nothing else is found, choose stereo output */
 617         val.i_int = AOUT_VAR_STEREO;
 618         break;
 619     }
 620
 621     /* Check if we want to override speaker config */
 622     switch( p_aout->output.p_sys->i_speaker_setup )
 623     {
 624     case 0: /* Default value aka Windows default speaker setup */
 625         break;
 626     case 1: /* Mono */
 627         msg_Dbg( p_aout, "SpeakerConfig is forced to Mono" );
 628         val.i_int = AOUT_VAR_MONO;
 629         break;
 630     case 2: /* Stereo */
 631         msg_Dbg( p_aout, "SpeakerConfig is forced to Stereo" );
 632         val.i_int = AOUT_VAR_STEREO;
 633         break;
 634     case 3: /* Quad */
 635         msg_Dbg( p_aout, "SpeakerConfig is forced to Quad" );
 636         val.i_int = AOUT_VAR_2F2R;
 637         break;
 638     case 4: /* 5.1 */
 639         msg_Dbg( p_aout, "SpeakerConfig is forced to 5.1" );
 640         val.i_int = AOUT_VAR_5_1;
 641         break;
 642     case 5: /* 7.1 */
 643         msg_Dbg( p_aout, "SpeakerConfig is forced to 7.1" );
 644         val.i_int = AOUT_VAR_7_1;
 645         break;
 646     default:
 647         msg_Dbg( p_aout, "SpeakerConfig is forced to non-existing value" );
 648         break;
 649     }
 650
 651     var_Set( p_aout, "audio-device", val );
 652
 653     /* Test for SPDIF support */
 654     if ( AOUT_FMT_NON_LINEAR( &p_aout->output.output ) )
 655     {
 656         if( CreateDSBuffer( p_aout, VLC_CODEC_SPDIFL,
 657                             p_aout->output.output.i_physical_channels,
 658                             aout_FormatNbChannels( &p_aout->output.output ),
 659                             p_aout->output.output.i_rate,
 660                             AOUT_SPDIF_SIZE, true )
 661             == VLC_SUCCESS )
 662         {
 663             msg_Dbg( p_aout, "device supports A/52 over S/PDIF" );
 664             val.i_int = AOUT_VAR_SPDIF;
 665             text.psz_string = _("A/52 over S/PDIF");
 666             var_Change( p_aout, "audio-device",
 667                         VLC_VAR_ADDCHOICE, &val, &text );
 668             if( config_GetInt( p_aout, "spdif" ) )
 669                 var_Set( p_aout, "audio-device", val );
 670         }
 671     }
 672
 673     var_Change( p_aout, "audio-device", VLC_VAR_CHOICESCOUNT, &val, NULL );
 674     if( val.i_int <= 0 )
 675     {
 676         /* Probe() has failed. */
 677         var_Destroy( p_aout, "audio-device" );
 678         return;
 679     }
 680
 681     var_AddCallback( p_aout, "audio-device", aout_ChannelsRestart, NULL );
 682     var_SetBool( p_aout, "intf-change", true );
 683 }
 684
 685 /*****************************************************************************
 686  * Play: we'll start playing the directsound buffer here because at least here
 687  *       we know the first buffer has been put in the aout fifo and we also
 688  *       know its date.
 689  *****************************************************************************/
 690 static void Play( aout_instance_t *p_aout )
 691 {
 692     if( !p_aout->output.p_sys->b_playing )
 693     {
 694         aout_buffer_t *p_buffer;
 695         int i;
 696
 697         p_aout->output.p_sys->b_playing = 1;
 698
 699         /* get the playing date of the first aout buffer */
 700         p_aout->output.p_sys->p_notif->start_date =
 701             aout_FifoFirstDate( p_aout, &p_aout->output.fifo );
 702
 703         /* fill in the first samples */
 704         for( i = 0; i < FRAMES_NUM; i++ )
 705         {
 706             p_buffer = aout_FifoPop( p_aout, &p_aout->output.fifo );
 707             if( !p_buffer ) break;
 708             FillBuffer( p_aout, i, p_buffer );
 709         }
 710
 711         /* wake up the audio output thread */
 712         SetEvent( p_aout->output.p_sys->p_notif->event );
 713     }
 714 }
 715
 716 /*****************************************************************************
 717  * CloseAudio: close the audio device
 718  *****************************************************************************/
 719 static void CloseAudio( vlc_object_t *p_this )
 720 {
 721     aout_instance_t * p_aout = (aout_instance_t *)p_this;
 722     aout_sys_t *p_sys = p_aout->output.p_sys;
 723
 724     msg_Dbg( p_aout, "closing audio device" );
 725
 726     /* kill the position notification thread, if any */
 727     if( p_sys->p_notif )
 728     {
 729         vlc_object_detach( p_sys->p_notif );
 730         vlc_object_kill( p_sys->p_notif );
 731         /* wake up the audio thread if needed */
 732         if( !p_sys->b_playing ) SetEvent( p_sys->p_notif->event );
 733
 734         vlc_thread_join( p_sys->p_notif );
 735         vlc_object_release( p_sys->p_notif );
 736     }
 737
 738     /* release the secondary buffer */
 739     DestroyDSBuffer( p_aout );
 740
 741     /* finally release the DirectSound object */
 742     if( p_sys->p_dsobject ) IDirectSound_Release( p_sys->p_dsobject );
 743
 744     /* free DSOUND.DLL */
 745     if( p_sys->hdsound_dll ) FreeLibrary( p_sys->hdsound_dll );
 746
 747     free( p_aout->output.p_sys->p_device_guid );
 748     free( p_sys );
 749 }
 750
 751 /*****************************************************************************
 752  * CallBackDirectSoundEnum: callback to enumerate available devices
 753  *****************************************************************************/
 754 static int CALLBACK CallBackDirectSoundEnum( LPGUID p_guid, LPCSTR psz_desc,
 755                                              LPCSTR psz_mod, LPVOID _p_aout )
 756 {
 757     VLC_UNUSED( psz_mod );
 758
 759     aout_instance_t *p_aout = (aout_instance_t *)_p_aout;
 760
 761     msg_Dbg( p_aout, "found device: %s", psz_desc );
 762
 763     if( p_aout->output.p_sys->psz_device && !strcmp(p_aout->output.p_sys->psz_device, psz_desc) && p_guid )
 764     {
 765         /* Use the device corresponding to psz_device */
 766         p_aout->output.p_sys->p_device_guid = malloc( sizeof( GUID ) );
 767         *p_aout->output.p_sys->p_device_guid = *p_guid;
 768         msg_Dbg( p_aout, "using device: %s", psz_desc );
 769     }
 770     else
 771     {
 772         /* If no default device has been selected, chose the first one */
 773         if( !p_aout->output.p_sys->psz_device && p_guid )
 774         {
 775             p_aout->output.p_sys->psz_device = strdup( psz_desc );
 776             p_aout->output.p_sys->p_device_guid = malloc( sizeof( GUID ) );
 777             *p_aout->output.p_sys->p_device_guid = *p_guid;
 778             msg_Dbg( p_aout, "using device: %s", psz_desc );
 779         }
 780     }
 781     return 1;
 782 }
 783
 784 /*****************************************************************************
 785  * InitDirectSound: handle all the gory details of DirectSound initialisation
 786  *****************************************************************************/
 787 static int InitDirectSound( aout_instance_t *p_aout )
 788 {
 789     HRESULT (WINAPI *OurDirectSoundCreate)(LPGUID, LPDIRECTSOUND *, LPUNKNOWN);
 790     HRESULT (WINAPI *OurDirectSoundEnumerate)(LPDSENUMCALLBACK, LPVOID);
 791
 792     p_aout->output.p_sys->hdsound_dll = LoadLibrary("DSOUND.DLL");
 793     if( p_aout->output.p_sys->hdsound_dll == NULL )
 794     {
 795         msg_Warn( p_aout, "cannot open DSOUND.DLL" );
 796         goto error;
 797     }
 798
 799     OurDirectSoundCreate = (void *)
 800         GetProcAddress( p_aout->output.p_sys->hdsound_dll,
 801                         "DirectSoundCreate" );
 802     if( OurDirectSoundCreate == NULL )
 803     {
 804         msg_Warn( p_aout, "GetProcAddress FAILED" );
 805         goto error;
 806     }
 807
 808     /* Get DirectSoundEnumerate */
 809     OurDirectSoundEnumerate = (void *)
 810        GetProcAddress( p_aout->output.p_sys->hdsound_dll,
 811                        "DirectSoundEnumerateA" );
 812     if( OurDirectSoundEnumerate )
 813     {
 814         p_aout->output.p_sys->psz_device = config_GetPsz(p_aout, "directx-audio-device-name");
 815         /* Attempt enumeration */
 816         if( FAILED( OurDirectSoundEnumerate( CallBackDirectSoundEnum,
 817                                              p_aout ) ) )
 818         {
 819             msg_Dbg( p_aout, "enumeration of DirectSound devices failed" );
 820         }
 821     }
 822
 823     /* Create the direct sound object */
 824     if FAILED( OurDirectSoundCreate( p_aout->output.p_sys->p_device_guid,
 825                                      &p_aout->output.p_sys->p_dsobject,
 826                                      NULL ) )
 827     {
 828         msg_Warn( p_aout, "cannot create a direct sound device" );
 829         goto error;
 830     }
 831
 832     /* Set DirectSound Cooperative level, ie what control we want over Windows
 833      * sound device. In our case, DSSCL_EXCLUSIVE means that we can modify the
 834      * settings of the primary buffer, but also that only the sound of our
 835      * application will be hearable when it will have the focus.
 836      * !!! (this is not really working as intended yet because to set the
 837      * cooperative level you need the window handle of your application, and
 838      * I don't know of any easy way to get it. Especially since we might play
 839      * sound without any video, and so what window handle should we use ???
 840      * The hack for now is to use the Desktop window handle - it seems to be
 841      * working */
 842     if( IDirectSound_SetCooperativeLevel( p_aout->output.p_sys->p_dsobject,
 843                                           GetDesktopWindow(),
 844                                           DSSCL_EXCLUSIVE) )
 845     {
 846         msg_Warn( p_aout, "cannot set direct sound cooperative level" );
 847     }
 848
 849     return VLC_SUCCESS;
 850
 851  error:
 852     p_aout->output.p_sys->p_dsobject = NULL;
 853     if( p_aout->output.p_sys->hdsound_dll )
 854     {
 855         FreeLibrary( p_aout->output.p_sys->hdsound_dll );
 856         p_aout->output.p_sys->hdsound_dll = NULL;
 857     }
 858     return VLC_EGENERIC;
 859
 860 }
 861
 862 /*****************************************************************************
 863  * CreateDSBuffer: Creates a direct sound buffer of the required format.
 864  *****************************************************************************
 865  * This function creates the buffer we'll use to play audio.
 866  * In DirectSound there are two kinds of buffers:
 867  * - the primary buffer: which is the actual buffer that the soundcard plays
 868  * - the secondary buffer(s): these buffers are the one actually used by
 869  *    applications and DirectSound takes care of mixing them into the primary.
 870  *
 871  * Once you create a secondary buffer, you cannot change its format anymore so
 872  * you have to release the current one and create another.
 873  *****************************************************************************/
 874 static int CreateDSBuffer( aout_instance_t *p_aout, int i_format,
 875                            int i_channels, int i_nb_channels, int i_rate,
 876                            int i_bytes_per_frame, bool b_probe )
 877 {
 878     WAVEFORMATEXTENSIBLE waveformat;
 879     DSBUFFERDESC         dsbdesc;
 880     unsigned int         i;
 881
 882     /* First set the sound buffer format */
 883     waveformat.dwChannelMask = 0;
 884     for( i = 0; i < sizeof(pi_channels_src)/sizeof(uint32_t); i++ )
 885     {
 886         if( i_channels & pi_channels_src[i] )
 887             waveformat.dwChannelMask |= pi_channels_in[i];
 888     }
 889
 890     switch( i_format )
 891     {
 892     case VLC_CODEC_SPDIFL:
 893         i_nb_channels = 2;
 894         /* To prevent channel re-ordering */
 895         waveformat.dwChannelMask = SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT;
 896         waveformat.Format.wBitsPerSample = 16;
 897         waveformat.Samples.wValidBitsPerSample =
 898             waveformat.Format.wBitsPerSample;
 899         waveformat.Format.wFormatTag = WAVE_FORMAT_DOLBY_AC3_SPDIF;
 900         waveformat.SubFormat = _KSDATAFORMAT_SUBTYPE_DOLBY_AC3_SPDIF;
 901         break;
 902
 903     case VLC_CODEC_FL32:
 904         waveformat.Format.wBitsPerSample = sizeof(float) * 8;
 905         waveformat.Samples.wValidBitsPerSample =
 906             waveformat.Format.wBitsPerSample;
 907         waveformat.Format.wFormatTag = WAVE_FORMAT_IEEE_FLOAT;
 908         waveformat.SubFormat = _KSDATAFORMAT_SUBTYPE_IEEE_FLOAT;
 909         break;
 910
 911     case VLC_CODEC_S16L:
 912         waveformat.Format.wBitsPerSample = 16;
 913         waveformat.Samples.wValidBitsPerSample =
 914             waveformat.Format.wBitsPerSample;
 915         waveformat.Format.wFormatTag = WAVE_FORMAT_PCM;
 916         waveformat.SubFormat = _KSDATAFORMAT_SUBTYPE_PCM;
 917         break;
 918     }
 919
 920     waveformat.Format.nChannels = i_nb_channels;
 921     waveformat.Format.nSamplesPerSec = i_rate;
 922     waveformat.Format.nBlockAlign =
 923         waveformat.Format.wBitsPerSample / 8 * i_nb_channels;
 924     waveformat.Format.nAvgBytesPerSec =
 925         waveformat.Format.nSamplesPerSec * waveformat.Format.nBlockAlign;
 926
 927     p_aout->output.p_sys->i_bits_per_sample = waveformat.Format.wBitsPerSample;
 928     p_aout->output.p_sys->i_channels = i_nb_channels;
 929
 930     /* Then fill in the direct sound descriptor */
 931     memset(&dsbdesc, 0, sizeof(DSBUFFERDESC));
 932     dsbdesc.dwSize = sizeof(DSBUFFERDESC);
 933     dsbdesc.dwFlags = DSBCAPS_GETCURRENTPOSITION2/* Better position accuracy */
 934                     | DSBCAPS_GLOBALFOCUS;      /* Allows background playing */
 935
 936     /* Only use the new WAVE_FORMAT_EXTENSIBLE format for multichannel audio */
 937     if( i_nb_channels <= 2 )
 938     {
 939         waveformat.Format.cbSize = 0;
 940     }
 941     else
 942     {
 943         waveformat.Format.wFormatTag = WAVE_FORMAT_EXTENSIBLE;
 944         waveformat.Format.cbSize =
 945             sizeof(WAVEFORMATEXTENSIBLE) - sizeof(WAVEFORMATEX);
 946
 947         /* Needed for 5.1 on emu101k */
 948         dsbdesc.dwFlags |= DSBCAPS_LOCHARDWARE;
 949     }
 950
 951     dsbdesc.dwBufferBytes = FRAMES_NUM * i_bytes_per_frame;   /* buffer size */
 952     dsbdesc.lpwfxFormat = (WAVEFORMATEX *)&waveformat;
 953
 954     if FAILED( IDirectSound_CreateSoundBuffer(
 955                    p_aout->output.p_sys->p_dsobject, &dsbdesc,
 956                    &p_aout->output.p_sys->p_dsbuffer, NULL) )
 957     {
 958         if( dsbdesc.dwFlags & DSBCAPS_LOCHARDWARE )
 959         {
 960             /* Try without DSBCAPS_LOCHARDWARE */
 961             dsbdesc.dwFlags &= ~DSBCAPS_LOCHARDWARE;
 962             if FAILED( IDirectSound_CreateSoundBuffer(
 963                    p_aout->output.p_sys->p_dsobject, &dsbdesc,
 964                    &p_aout->output.p_sys->p_dsbuffer, NULL) )
 965             {
 966                 return VLC_EGENERIC;
 967             }
 968             if( !b_probe )
 969                 msg_Dbg( p_aout, "couldn't use hardware sound buffer" );
 970         }
 971         else
 972         {
 973             return VLC_EGENERIC;
 974         }
 975     }
 976
 977     /* Stop here if we were just probing */
 978     if( b_probe )
 979     {
 980         IDirectSoundBuffer_Release( p_aout->output.p_sys->p_dsbuffer );
 981         p_aout->output.p_sys->p_dsbuffer = NULL;
 982         return VLC_SUCCESS;
 983     }
 984
 985     p_aout->output.p_sys->i_frame_size = i_bytes_per_frame;
 986     p_aout->output.p_sys->i_channel_mask = waveformat.dwChannelMask;
 987     p_aout->output.p_sys->b_chan_reorder =
 988         aout_CheckChannelReorder( pi_channels_in, pi_channels_out,
 989                                   waveformat.dwChannelMask, i_nb_channels,
 990                                   p_aout->output.p_sys->pi_chan_table );
 991
 992     if( p_aout->output.p_sys->b_chan_reorder )
 993     {
 994         msg_Dbg( p_aout, "channel reordering needed" );
 995     }
 996
 997     return VLC_SUCCESS;
 998 }
 999
1000 /*****************************************************************************
1001  * CreateDSBufferPCM: creates a PCM direct sound buffer.
1002  *****************************************************************************
1003  * We first try to create a WAVE_FORMAT_IEEE_FLOAT buffer if supported by
1004  * the hardware, otherwise we create a WAVE_FORMAT_PCM buffer.
1005  ****************************************************************************/
1006 static int CreateDSBufferPCM( aout_instance_t *p_aout, vlc_fourcc_t *i_format,
1007                               int i_channels, int i_nb_channels, int i_rate,
1008                               bool b_probe )
1009 {
1010     /* Float32 audio samples are not supported for 5.1 output on the emu101k */
1011     if( !var_GetBool( p_aout, "directx-audio-float32" ) ||
1012         i_nb_channels > 2 ||
1013         CreateDSBuffer( p_aout, VLC_CODEC_FL32,
1014                         i_channels, i_nb_channels, i_rate,
1015                         FRAME_SIZE * 4 * i_nb_channels, b_probe )
1016         != VLC_SUCCESS )
1017     {
1018         if ( CreateDSBuffer( p_aout, VLC_CODEC_S16L,
1019                              i_channels, i_nb_channels, i_rate,
1020                              FRAME_SIZE * 2 * i_nb_channels, b_probe )
1021              != VLC_SUCCESS )
1022         {
1023             return VLC_EGENERIC;
1024         }
1025         else
1026         {
1027             *i_format = VLC_CODEC_S16L;
1028             return VLC_SUCCESS;
1029         }
1030     }
1031     else
1032     {
1033         *i_format = VLC_CODEC_FL32;
1034         return VLC_SUCCESS;
1035     }
1036 }
1037
1038 /*****************************************************************************
1039  * DestroyDSBuffer
1040  *****************************************************************************
1041  * This function destroys the secondary buffer.
1042  *****************************************************************************/
1043 static void DestroyDSBuffer( aout_instance_t *p_aout )
1044 {
1045     if( p_aout->output.p_sys->p_dsbuffer )
1046     {
1047         IDirectSoundBuffer_Release( p_aout->output.p_sys->p_dsbuffer );
1048         p_aout->output.p_sys->p_dsbuffer = NULL;
1049     }
1050 }
1051
1052 /*****************************************************************************
1053  * FillBuffer: Fill in one of the direct sound frame buffers.
1054  *****************************************************************************
1055  * Returns VLC_SUCCESS on success.
1056  *****************************************************************************/
1057 static int FillBuffer( aout_instance_t *p_aout, int i_frame,
1058                        aout_buffer_t *p_buffer )
1059 {
1060     notification_thread_t *p_notif = p_aout->output.p_sys->p_notif;
1061     aout_sys_t *p_sys = p_aout->output.p_sys;
1062     void *p_write_position, *p_wrap_around;
1063     unsigned long l_bytes1, l_bytes2;
1064     HRESULT dsresult;
1065
1066     /* Before copying anything, we have to lock the buffer */
1067     dsresult = IDirectSoundBuffer_Lock(
1068                 p_sys->p_dsbuffer,                              /* DS buffer */
1069                 i_frame * p_notif->i_frame_size,             /* Start offset */
1070                 p_notif->i_frame_size,                    /* Number of bytes */
1071                 &p_write_position,                  /* Address of lock start */
1072                 &l_bytes1,       /* Count of bytes locked before wrap around */
1073                 &p_wrap_around,            /* Buffer adress (if wrap around) */
1074                 &l_bytes2,               /* Count of bytes after wrap around */
1075                 0 );                                                /* Flags */
1076     if( dsresult == DSERR_BUFFERLOST )
1077     {
1078         IDirectSoundBuffer_Restore( p_sys->p_dsbuffer );
1079         dsresult = IDirectSoundBuffer_Lock(
1080                                p_sys->p_dsbuffer,
1081                                i_frame * p_notif->i_frame_size,
1082                                p_notif->i_frame_size,
1083                                &p_write_position,
1084                                &l_bytes1,
1085                                &p_wrap_around,
1086                                &l_bytes2,
1087                                0 );
1088     }
1089     if( dsresult != DS_OK )
1090     {
1091         msg_Warn( p_notif, "cannot lock buffer" );
1092         if( p_buffer ) aout_BufferFree( p_buffer );
1093         return VLC_EGENERIC;
1094     }
1095
1096     if( p_buffer == NULL )
1097     {
1098         memset( p_write_position, 0, l_bytes1 );
1099     }
1100     else
1101     {
1102         if( p_sys->b_chan_reorder )
1103         {
1104             /* Do the channel reordering here */
1105             aout_ChannelReorder( p_buffer->p_buffer, p_buffer->i_buffer,
1106                                  p_sys->i_channels, p_sys->pi_chan_table,
1107                                  p_sys->i_bits_per_sample );
1108         }
1109
1110         vlc_memcpy( p_write_position, p_buffer->p_buffer, l_bytes1 );
1111         aout_BufferFree( p_buffer );
1112     }
1113
1114     /* Now the data has been copied, unlock the buffer */
1115     IDirectSoundBuffer_Unlock( p_sys->p_dsbuffer, p_write_position, l_bytes1,
1116                                p_wrap_around, l_bytes2 );
1117
1118     p_notif->i_write_slot = (i_frame + 1) % FRAMES_NUM;
1119     return VLC_SUCCESS;
1120 }
1121
1122 /*****************************************************************************
1123  * DirectSoundThread: this thread will capture play notification events.
1124  *****************************************************************************
1125  * We use this thread to emulate a callback mechanism. The thread probes for
1126  * event notification and fills up the DS secondary buffer when needed.
1127  *****************************************************************************/
1128 static void* DirectSoundThread( vlc_object_t *p_this )
1129 {
1130     notification_thread_t *p_notif = (notification_thread_t*)p_this;
1131     aout_instance_t *p_aout = p_notif->p_aout;
1132     mtime_t last_time;
1133     int canc = vlc_savecancel ();
1134
1135     /* We don't want any resampling when using S/PDIF output */
1136     bool b_sleek = (p_aout->output.output.i_format == VLC_CODEC_SPDIFL);
1137
1138     msg_Dbg( p_notif, "DirectSoundThread ready" );
1139
1140     /* Wait here until Play() is called */
1141     WaitForSingleObject( p_notif->event, INFINITE );
1142
1143     if( vlc_object_alive (p_notif) )
1144     {
1145         HRESULT dsresult;
1146         mwait( p_notif->start_date - AOUT_PTS_TOLERANCE / 2 );
1147
1148         /* start playing the buffer */
1149         dsresult = IDirectSoundBuffer_Play( p_aout->output.p_sys->p_dsbuffer,
1150                                         0,                         /* Unused */
1151                                         0,                         /* Unused */
1152                                         DSBPLAY_LOOPING );          /* Flags */
1153         if( dsresult == DSERR_BUFFERLOST )
1154         {
1155             IDirectSoundBuffer_Restore( p_aout->output.p_sys->p_dsbuffer );
1156             dsresult = IDirectSoundBuffer_Play(
1157                                             p_aout->output.p_sys->p_dsbuffer,
1158                                             0,                     /* Unused */
1159                                             0,                     /* Unused */
1160                                             DSBPLAY_LOOPING );      /* Flags */
1161         }
1162         if( dsresult != DS_OK )
1163         {
1164             msg_Err( p_aout, "cannot start playing buffer" );
1165         }
1166     }
1167     last_time = mdate();
1168
1169     while( vlc_object_alive (p_notif) )
1170     {
1171         DWORD l_read;
1172         int l_queued = 0, l_free_slots;
1173         unsigned i_frame_siz = p_aout->output.i_nb_samples;
1174         mtime_t mtime = mdate();
1175         int i;
1176
1177         /*
1178          * Fill in as much audio data as we can in our circular buffer
1179          */
1180
1181         /* Find out current play position */
1182         if FAILED( IDirectSoundBuffer_GetCurrentPosition(
1183                    p_aout->output.p_sys->p_dsbuffer, &l_read, NULL ) )
1184         {
1185             msg_Err( p_aout, "GetCurrentPosition() failed!" );
1186             l_read = 0;
1187         }
1188
1189         /* Detect underruns */
1190         if( l_queued && mtime - last_time >
1191             INT64_C(1000000) * l_queued / p_aout->output.output.i_rate )
1192         {
1193             msg_Dbg( p_aout, "detected underrun!" );
1194         }
1195         last_time = mtime;
1196
1197         /* Try to fill in as many frame buffers as possible */
1198         l_read /= (p_aout->output.output.i_bytes_per_frame /
1199             p_aout->output.output.i_frame_length);
1200         l_queued = p_notif->i_write_slot * i_frame_siz - l_read;
1201         if( l_queued < 0 ) l_queued += (i_frame_siz * FRAMES_NUM);
1202         l_free_slots = (FRAMES_NUM * i_frame_siz - l_queued) / i_frame_siz;
1203
1204         for( i = 0; i < l_free_slots; i++ )
1205         {
1206             aout_buffer_t *p_buffer = aout_OutputNextBuffer( p_aout,
1207                 mtime + INT64_C(1000000) * (i * i_frame_siz + l_queued) /
1208                 p_aout->output.output.i_rate, b_sleek );
1209
1210             /* If there is no audio data available and we have some buffered
1211              * already, then just wait for the next time */
1212             if( !p_buffer && (i || l_queued / i_frame_siz) ) break;
1213
1214             if( FillBuffer( p_aout, p_notif->i_write_slot % FRAMES_NUM,
1215                             p_buffer ) != VLC_SUCCESS ) break;
1216         }
1217
1218         /* Sleep a reasonable amount of time */
1219         l_queued += (i * i_frame_siz);
1220         msleep( INT64_C(1000000) * l_queued / p_aout->output.output.i_rate / 2 );
1221     }
1222
1223     /* make sure the buffer isn't playing */
1224     IDirectSoundBuffer_Stop( p_aout->output.p_sys->p_dsbuffer );
1225
1226     /* free the event */
1227     CloseHandle( p_notif->event );
1228
1229     vlc_restorecancel (canc);
1230     msg_Dbg( p_notif, "DirectSoundThread exiting" );
1231     return NULL;
1232 }
1233
1234 /*****************************************************************************
1235  * CallBackConfigNBEnum: callback to get the number of available devices
1236  *****************************************************************************/
1237 static int CALLBACK CallBackConfigNBEnum( LPGUID p_guid, LPCSTR psz_desc,
1238                                              LPCSTR psz_mod, LPVOID p_nb )
1239 {
1240     VLC_UNUSED( psz_mod );
1241     VLC_UNUSED( psz_desc );
1242     VLC_UNUSED( p_guid );
1243     int * a = (int *)p_nb;
1244     *a = *a +1;
1245     return 1;
1246 }
1247
1248 /*****************************************************************************
1249  * CallBackConfigEnum: callback to add available devices to the preferences list
1250  *****************************************************************************/
1251 static int CALLBACK CallBackConfigEnum( LPGUID p_guid, LPCSTR psz_desc,
1252                                              LPCSTR psz_mod, LPVOID _p_item )
1253 {
1254     VLC_UNUSED( psz_mod );
1255     VLC_UNUSED( p_guid );
1256
1257     module_config_t *p_item = (module_config_t *) _p_item;
1258
1259     p_item->ppsz_list[p_item->i_list] = FromLocaleDup(psz_desc);
1260     p_item->ppsz_list_text[p_item->i_list] = FromLocaleDup(psz_desc);
1261     p_item->i_list = p_item->i_list +1;
1262     return 1;
1263 }
1264
1265 /*****************************************************************************
1266  * ReloadDirectXDevices: store the list of devices in preferences
1267  *****************************************************************************/
1268 static int ReloadDirectXDevices( vlc_object_t *p_this, char const *psz_name,
1269                                  vlc_value_t newval, vlc_value_t oldval, void *data )
1270 {
1271     VLC_UNUSED( newval ); VLC_UNUSED( oldval ); VLC_UNUSED( data );
1272     module_config_t *p_item = config_FindConfig( p_this, psz_name );
1273     if( !p_item ) return VLC_SUCCESS;
1274
1275     /* Clear-up the current list */
1276     if( p_item->i_list )
1277     {
1278         int i;
1279         for( i = 0; i < p_item->i_list; i++ )
1280         {
1281             free((char *)(p_item->ppsz_list[i]) );
1282             free((char *)(p_item->ppsz_list_text[i]) );
1283         }
1284     }
1285
1286     HRESULT (WINAPI *OurDirectSoundEnumerate)(LPDSENUMCALLBACK, LPVOID);
1287
1288     HANDLE hdsound_dll = LoadLibrary("DSOUND.DLL");
1289     if( hdsound_dll == NULL )
1290     {
1291         msg_Warn( p_this, "cannot open DSOUND.DLL" );
1292     }
1293
1294     /* Get DirectSoundEnumerate */
1295     OurDirectSoundEnumerate = (void *)
1296        GetProcAddress( hdsound_dll,
1297                        "DirectSoundEnumerateA" );
1298     int nb_devices = 0;
1299     OurDirectSoundEnumerate(CallBackConfigNBEnum, &nb_devices);
1300     msg_Dbg(p_this,"found %d devices", nb_devices);
1301
1302     p_item->ppsz_list = xrealloc( p_item->ppsz_list,
1303                           nb_devices * sizeof(char *) );
1304     p_item->ppsz_list_text = xrealloc( p_item->ppsz_list_text,
1305                           nb_devices * sizeof(char *) );
1306
1307     p_item->i_list = 0;
1308     OurDirectSoundEnumerate(CallBackConfigEnum, p_item);
1309
1310     FreeLibrary(hdsound_dll);
1311
1312     /* Signal change to the interface */
1313     p_item->b_dirty = true;
1314
1315     return VLC_SUCCESS;
1316 }
1317