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
  36 #include <windows.h>
  37 #include <mmsystem.h>
  38 #include <dsound.h>
  39
  40 #define FRAME_SIZE ((int)p_aout->output.output.i_rate/20) /* Size in samples */
  41 #define FRAMES_NUM 8                                      /* Needs to be > 3 */
  42
  43 /*****************************************************************************
  44  * DirectSound GUIDs.
  45  * Defining them here allows us to get rid of the dxguid library during
  46  * the linking stage.
  47  *****************************************************************************/
  48 #include <initguid.h>
  49
  50 /*****************************************************************************
  51  * Useful macros
  52  *****************************************************************************/
  53 #ifndef WAVE_FORMAT_IEEE_FLOAT
  54 #   define WAVE_FORMAT_IEEE_FLOAT 0x0003
  55 #endif
  56
  57 #ifndef WAVE_FORMAT_DOLBY_AC3_SPDIF
  58 #   define WAVE_FORMAT_DOLBY_AC3_SPDIF 0x0092
  59 #endif
  60
  61 #ifndef WAVE_FORMAT_EXTENSIBLE
  62 #define  WAVE_FORMAT_EXTENSIBLE   0xFFFE
  63 #endif
  64
  65 #ifndef SPEAKER_FRONT_LEFT
  66 #   define SPEAKER_FRONT_LEFT             0x1
  67 #   define SPEAKER_FRONT_RIGHT            0x2
  68 #   define SPEAKER_FRONT_CENTER           0x4
  69 #   define SPEAKER_LOW_FREQUENCY          0x8
  70 #   define SPEAKER_BACK_LEFT              0x10
  71 #   define SPEAKER_BACK_RIGHT             0x20
  72 #   define SPEAKER_FRONT_LEFT_OF_CENTER   0x40
  73 #   define SPEAKER_FRONT_RIGHT_OF_CENTER  0x80
  74 #   define SPEAKER_BACK_CENTER            0x100
  75 #   define SPEAKER_SIDE_LEFT              0x200
  76 #   define SPEAKER_SIDE_RIGHT             0x400
  77 #   define SPEAKER_TOP_CENTER             0x800
  78 #   define SPEAKER_TOP_FRONT_LEFT         0x1000
  79 #   define SPEAKER_TOP_FRONT_CENTER       0x2000
  80 #   define SPEAKER_TOP_FRONT_RIGHT        0x4000
  81 #   define SPEAKER_TOP_BACK_LEFT          0x8000
  82 #   define SPEAKER_TOP_BACK_CENTER        0x10000
  83 #   define SPEAKER_TOP_BACK_RIGHT         0x20000
  84 #   define SPEAKER_RESERVED               0x80000000
  85 #endif
  86
  87 #ifndef DSSPEAKER_DSSPEAKER_DIRECTOUT
  88 #   define DSSPEAKER_DSSPEAKER_DIRECTOUT         0x00000000
  89 #endif
  90 #ifndef DSSPEAKER_HEADPHONE
  91 #   define DSSPEAKER_HEADPHONE         0x00000001
  92 #endif
  93 #ifndef DSSPEAKER_MONO
  94 #   define DSSPEAKER_MONO              0x00000002
  95 #endif
  96 #ifndef DSSPEAKER_QUAD
  97 #   define DSSPEAKER_QUAD              0x00000003
  98 #endif
  99 #ifndef DSSPEAKER_STEREO
 100 #   define DSSPEAKER_STEREO            0x00000004
 101 #endif
 102 #ifndef DSSPEAKER_SURROUND
 103 #   define DSSPEAKER_SURROUND          0x00000005
 104 #endif
 105 #ifndef DSSPEAKER_5POINT1
 106 #   define DSSPEAKER_5POINT1           0x00000006
 107 #endif
 108 #ifndef DSSPEAKER_7POINT1
 109 #   define DSSPEAKER_7POINT1           0x00000007
 110 #endif
 111 #ifndef DSSPEAKER_7POINT1_SURROUND
 112 #   define DSSPEAKER_7POINT1_SURROUND           0x00000008
 113 #endif
 114 #ifndef DSSPEAKER_7POINT1_WIDE
 115 #   define DSSPEAKER_7POINT1_WIDE           DSSPEAKER_7POINT1
 116 #endif
 117
 118 #ifndef _WAVEFORMATEXTENSIBLE_
 119 typedef struct {
 120     WAVEFORMATEX    Format;
 121     union {
 122         WORD wValidBitsPerSample;       /* bits of precision  */
 123         WORD wSamplesPerBlock;          /* valid if wBitsPerSample==0 */
 124         WORD wReserved;                 /* If neither applies, set to zero. */
 125     } Samples;
 126     DWORD           dwChannelMask;      /* which channels are */
 127                                         /* present in stream  */
 128     GUID            SubFormat;
 129 } WAVEFORMATEXTENSIBLE, *PWAVEFORMATEXTENSIBLE;
 130 #endif
 131
 132 DEFINE_GUID( _KSDATAFORMAT_SUBTYPE_IEEE_FLOAT, WAVE_FORMAT_IEEE_FLOAT, 0x0000, 0x0010, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 );
 133 DEFINE_GUID( _KSDATAFORMAT_SUBTYPE_PCM, WAVE_FORMAT_PCM, 0x0000, 0x0010, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 );
 134 DEFINE_GUID( _KSDATAFORMAT_SUBTYPE_DOLBY_AC3_SPDIF, WAVE_FORMAT_DOLBY_AC3_SPDIF, 0x0000, 0x0010, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 );
 135
 136 /*****************************************************************************
 137  * notification_thread_t: DirectX event thread
 138  *****************************************************************************/
 139 typedef struct notification_thread_t
 140 {
 141     VLC_COMMON_MEMBERS
 142
 143     aout_instance_t *p_aout;
 144     int i_frame_size;                          /* size in bytes of one frame */
 145     int i_write_slot;       /* current write position in our circular buffer */
 146
 147     mtime_t start_date;
 148     HANDLE event;
 149
 150 } notification_thread_t;
 151
 152 /*****************************************************************************
 153  * aout_sys_t: directx audio output method descriptor
 154  *****************************************************************************
 155  * This structure is part of the audio output thread descriptor.
 156  * It describes the direct sound specific properties of an audio device.
 157  *****************************************************************************/
 158 struct aout_sys_t
 159 {
 160     HINSTANCE           hdsound_dll;      /* handle of the opened dsound dll */
 161
 162     int                 i_device_id;                 /*  user defined device */
 163     LPGUID              p_device_guid;
 164
 165     LPDIRECTSOUND       p_dsobject;              /* main Direct Sound object */
 166     LPDIRECTSOUNDBUFFER p_dsbuffer;   /* the sound buffer we use (direct sound
 167                                        * takes care of mixing all the
 168                                        * secondary buffers into the primary) */
 169
 170     notification_thread_t *p_notif;                  /* DirectSoundThread id */
 171
 172     int b_playing;                                         /* playing status */
 173
 174     int i_frame_size;                         /* Size in bytes of one frame */
 175
 176     int i_speaker_setup;                 /* Speaker setup override */
 177
 178     bool b_chan_reorder;              /* do we need channel reordering */
 179     int pi_chan_table[AOUT_CHAN_MAX];
 180     uint32_t i_channel_mask;
 181     uint32_t i_bits_per_sample;
 182     uint32_t i_channels;
 183 };
 184
 185 static const uint32_t pi_channels_src[] =
 186     { AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT,
 187       AOUT_CHAN_MIDDLELEFT, AOUT_CHAN_MIDDLERIGHT,
 188       AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT, AOUT_CHAN_REARCENTER,
 189       AOUT_CHAN_CENTER, AOUT_CHAN_LFE, 0 };
 190 static const uint32_t pi_channels_in[] =
 191     { SPEAKER_FRONT_LEFT, SPEAKER_FRONT_RIGHT,
 192       SPEAKER_SIDE_LEFT, SPEAKER_SIDE_RIGHT,
 193       SPEAKER_BACK_LEFT, SPEAKER_BACK_RIGHT, SPEAKER_BACK_CENTER,
 194       SPEAKER_FRONT_CENTER, SPEAKER_LOW_FREQUENCY, 0 };
 195 static const uint32_t pi_channels_out[] =
 196     { SPEAKER_FRONT_LEFT, SPEAKER_FRONT_RIGHT,
 197       SPEAKER_FRONT_CENTER, SPEAKER_LOW_FREQUENCY,
 198       SPEAKER_BACK_LEFT, SPEAKER_BACK_RIGHT,
 199       SPEAKER_BACK_CENTER,
 200       SPEAKER_SIDE_LEFT, SPEAKER_SIDE_RIGHT, 0 };
 201
 202 /*****************************************************************************
 203  * Local prototypes.
 204  *****************************************************************************/
 205 static int  OpenAudio  ( vlc_object_t * );
 206 static void CloseAudio ( vlc_object_t * );
 207 static void Play       ( aout_instance_t * );
 208
 209 /* local functions */
 210 static void Probe             ( aout_instance_t * );
 211 static int  InitDirectSound   ( aout_instance_t * );
 212 static int  CreateDSBuffer    ( aout_instance_t *, int, int, int, int, int, bool );
 213 static int  CreateDSBufferPCM ( aout_instance_t *, vlc_fourcc_t*, int, int, int, bool );
 214 static void DestroyDSBuffer   ( aout_instance_t * );
 215 static void* DirectSoundThread( vlc_object_t * );
 216 static int  FillBuffer        ( aout_instance_t *, int, aout_buffer_t * );
 217
 218 /* Speaker setup override options list */
 219 static const char *const speaker_list[] = { "Windows default", "Mono", "Stereo",
 220                                             "Quad", "5.1", "7.1" };
 221
 222 /*****************************************************************************
 223  * Module descriptor
 224  *****************************************************************************/
 225 #define DEVICE_TEXT N_("Output device")
 226 #define DEVICE_LONGTEXT N_( \
 227     "DirectX device number: 0 default device, 1..N device by number" \
 228     "(Note that the default device appears as 0 AND another number)." )
 229 #define FLOAT_TEXT N_("Use float32 output")
 230 #define FLOAT_LONGTEXT N_( \
 231     "The option allows you to enable or disable the high-quality float32 " \
 232     "audio output mode (which is not well supported by some soundcards)." )
 233 #define SPEAKER_TEXT N_("Speaker configuration")
 234 #define SPEAKER_LONGTEXT N_("Select speaker configuration you want to use. " \
 235     "This option doesn't upmix! So NO e.g. Stereo -> 5.1 conversion." )
 236
 237 vlc_module_begin ()
 238     set_description( N_("DirectX audio output") )
 239     set_shortname( "DirectX" )
 240     set_capability( "audio output", 100 )
 241     set_category( CAT_AUDIO )
 242     set_subcategory( SUBCAT_AUDIO_AOUT )
 243     add_shortcut( "directx" )
 244     add_integer( "directx-audio-device", 0, NULL, DEVICE_TEXT,
 245                  DEVICE_LONGTEXT, true )
 246     add_bool( "directx-audio-float32", false, NULL, FLOAT_TEXT,
 247               FLOAT_LONGTEXT, true )
 248     add_string( "directx-audio-speaker", "Windows default", NULL,
 249                  SPEAKER_TEXT, SPEAKER_LONGTEXT, true )
 250         change_string_list( speaker_list, 0, 0 )
 251         change_need_restart ()
 252     set_callbacks( OpenAudio, CloseAudio )
 253 vlc_module_end ()
 254
 255 /*****************************************************************************
 256  * OpenAudio: open the audio device
 257  *****************************************************************************
 258  * This function opens and setups Direct Sound.
 259  *****************************************************************************/
 260 static int OpenAudio( vlc_object_t *p_this )
 261 {
 262     aout_instance_t * p_aout = (aout_instance_t *)p_this;
 263     vlc_value_t val;
 264     char * psz_speaker;
 265     int i = 0;
 266
 267     const char * const * ppsz_compare = speaker_list;
 268
 269     msg_Dbg( p_aout, "OpenAudio" );
 270
 271    /* Allocate structure */
 272     p_aout->output.p_sys = malloc( sizeof( aout_sys_t ) );
 273     if( p_aout->output.p_sys == NULL )
 274         return VLC_ENOMEM;
 275
 276     /* Initialize some variables */
 277     p_aout->output.p_sys->p_dsobject = NULL;
 278     p_aout->output.p_sys->p_dsbuffer = NULL;
 279     p_aout->output.p_sys->p_notif = NULL;
 280     p_aout->output.p_sys->b_playing = 0;
 281
 282     p_aout->output.pf_play = Play;
 283     aout_VolumeSoftInit( p_aout );
 284
 285     /* Retrieve config values */
 286     var_Create( p_aout, "directx-audio-float32",
 287                 VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 288     psz_speaker = var_CreateGetString( p_aout, "directx-audio-speaker" );
 289
 290     while ( *ppsz_compare != NULL )
 291     {
 292         if ( !strncmp( *ppsz_compare, psz_speaker, strlen(*ppsz_compare) ) )
 293         {
 294             break;
 295         }
 296         ppsz_compare++; i++;
 297     }
 298
 299     if ( *ppsz_compare == NULL )
 300     {
 301         msg_Err( p_aout, "(%s) isn't valid speaker setup option",
 302                  psz_speaker );
 303         msg_Err( p_aout, "Defaulting to Windows default speaker config");
 304         i = 0;
 305     }
 306     free( psz_speaker );
 307     p_aout->output.p_sys->i_speaker_setup = i;
 308
 309     p_aout->output.p_sys->i_device_id = var_CreateGetInteger( p_aout,
 310                                                "directx-audio-device" );
 311     p_aout->output.p_sys->p_device_guid = 0;
 312
 313     /* Initialise DirectSound */
 314     if( InitDirectSound( p_aout ) )
 315     {
 316         msg_Err( p_aout, "cannot initialize DirectSound" );
 317         goto error;
 318     }
 319
 320     if( var_Type( p_aout, "audio-device" ) == 0 )
 321     {
 322         Probe( p_aout );
 323     }
 324
 325     if( var_Get( p_aout, "audio-device", &val ) < 0 )
 326     {
 327         /* Probe() has failed. */
 328         goto error;
 329     }
 330
 331     /* Open the device */
 332     if( val.i_int == AOUT_VAR_SPDIF )
 333     {
 334         p_aout->output.output.i_format = VLC_CODEC_SPDIFL;
 335
 336         /* Calculate the frame size in bytes */
 337         p_aout->output.i_nb_samples = A52_FRAME_NB;
 338         p_aout->output.output.i_bytes_per_frame = AOUT_SPDIF_SIZE;
 339         p_aout->output.output.i_frame_length = A52_FRAME_NB;
 340         p_aout->output.p_sys->i_frame_size =
 341             p_aout->output.output.i_bytes_per_frame;
 342
 343         if( CreateDSBuffer( p_aout, VLC_CODEC_SPDIFL,
 344                             p_aout->output.output.i_physical_channels,
 345                             aout_FormatNbChannels( &p_aout->output.output ),
 346                             p_aout->output.output.i_rate,
 347                             p_aout->output.p_sys->i_frame_size, false )
 348             != VLC_SUCCESS )
 349         {
 350             msg_Err( p_aout, "cannot open directx audio device" );
 351             free( p_aout->output.p_sys );
 352             return VLC_EGENERIC;
 353         }
 354
 355         aout_VolumeNoneInit( p_aout );
 356     }
 357     else
 358     {
 359         if( val.i_int == AOUT_VAR_5_1 )
 360         {
 361             p_aout->output.output.i_physical_channels
 362                 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
 363                    | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT
 364                    | AOUT_CHAN_LFE;
 365         }
 366         else if( val.i_int == AOUT_VAR_7_1 )
 367         {
 368                     p_aout->output.output.i_physical_channels
 369                         = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
 370                            | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT
 371                            | AOUT_CHAN_MIDDLELEFT | AOUT_CHAN_MIDDLERIGHT
 372                            | AOUT_CHAN_LFE;
 373         }
 374         else if( val.i_int == AOUT_VAR_3F2R )
 375         {
 376             p_aout->output.output.i_physical_channels
 377                 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
 378                    | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
 379         }
 380         else if( val.i_int == AOUT_VAR_2F2R )
 381         {
 382             p_aout->output.output.i_physical_channels
 383                 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT
 384                    | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
 385         }
 386         else if( val.i_int == AOUT_VAR_MONO )
 387         {
 388             p_aout->output.output.i_physical_channels = AOUT_CHAN_CENTER;
 389         }
 390         else
 391         {
 392             p_aout->output.output.i_physical_channels
 393                 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
 394         }
 395
 396         if( CreateDSBufferPCM( p_aout, &p_aout->output.output.i_format,
 397                                p_aout->output.output.i_physical_channels,
 398                                aout_FormatNbChannels( &p_aout->output.output ),
 399                                p_aout->output.output.i_rate, false )
 400             != VLC_SUCCESS )
 401         {
 402             msg_Err( p_aout, "cannot open directx audio device" );
 403             free( p_aout->output.p_sys );
 404             return VLC_EGENERIC;
 405         }
 406
 407         /* Calculate the frame size in bytes */
 408         p_aout->output.i_nb_samples = FRAME_SIZE;
 409         aout_FormatPrepare( &p_aout->output.output );
 410         aout_VolumeSoftInit( p_aout );
 411     }
 412
 413     /* Now we need to setup our DirectSound play notification structure */
 414     p_aout->output.p_sys->p_notif =
 415         vlc_object_create( p_aout, sizeof(notification_thread_t) );
 416     p_aout->output.p_sys->p_notif->p_aout = p_aout;
 417
 418     p_aout->output.p_sys->p_notif->event = CreateEvent( 0, FALSE, FALSE, 0 );
 419     p_aout->output.p_sys->p_notif->i_frame_size =
 420         p_aout->output.p_sys->i_frame_size;
 421
 422     /* then launch the notification thread */
 423     msg_Dbg( p_aout, "creating DirectSoundThread" );
 424     if( vlc_thread_create( p_aout->output.p_sys->p_notif,
 425                            "DirectSound Notification Thread",
 426                            DirectSoundThread,
 427                            VLC_THREAD_PRIORITY_HIGHEST ) )
 428     {
 429         msg_Err( p_aout, "cannot create DirectSoundThread" );
 430         CloseHandle( p_aout->output.p_sys->p_notif->event );
 431         vlc_object_release( p_aout->output.p_sys->p_notif );
 432         p_aout->output.p_sys->p_notif = NULL;
 433         goto error;
 434     }
 435
 436     vlc_object_attach( p_aout->output.p_sys->p_notif, p_aout );
 437
 438     return VLC_SUCCESS;
 439
 440  error:
 441     CloseAudio( VLC_OBJECT(p_aout) );
 442     return VLC_EGENERIC;
 443 }
 444
 445 /*****************************************************************************
 446  * Probe: probe the audio device for available formats and channels
 447  *****************************************************************************/
 448 static void Probe( aout_instance_t * p_aout )
 449 {
 450     vlc_value_t val, text;
 451     vlc_fourcc_t i_format;
 452     unsigned int i_physical_channels;
 453     DWORD ui_speaker_config;
 454     bool is_default_output_set = false;
 455
 456     var_Create( p_aout, "audio-device", VLC_VAR_INTEGER | VLC_VAR_HASCHOICE );
 457     text.psz_string = _("Audio Device");
 458     var_Change( p_aout, "audio-device", VLC_VAR_SETTEXT, &text, NULL );
 459
 460     /* Test for 5.1 support */
 461     i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
 462                           AOUT_CHAN_CENTER | AOUT_CHAN_REARLEFT |
 463                           AOUT_CHAN_REARRIGHT | AOUT_CHAN_LFE;
 464     if( p_aout->output.output.i_physical_channels == i_physical_channels )
 465     {
 466         if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 6,
 467                                p_aout->output.output.i_rate, true )
 468             == VLC_SUCCESS )
 469         {
 470             val.i_int = AOUT_VAR_5_1;
 471             text.psz_string = (char*) "5.1";
 472             var_Change( p_aout, "audio-device",
 473                         VLC_VAR_ADDCHOICE, &val, &text );
 474             var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
 475             is_default_output_set = true;
 476             msg_Dbg( p_aout, "device supports 5.1 channels" );
 477         }
 478     }
 479
 480     /* Test for 7.1 support */
 481     i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
 482                              AOUT_CHAN_CENTER | AOUT_CHAN_REARLEFT |
 483                              AOUT_CHAN_MIDDLELEFT | AOUT_CHAN_MIDDLERIGHT |
 484                              AOUT_CHAN_REARRIGHT | AOUT_CHAN_LFE;
 485     if( p_aout->output.output.i_physical_channels == i_physical_channels )
 486     {
 487         if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 8,
 488                                   p_aout->output.output.i_rate, true )
 489             == VLC_SUCCESS )
 490         {
 491             val.i_int = AOUT_VAR_7_1;
 492             text.psz_string = (char*) "7.1";
 493             var_Change( p_aout, "audio-device",
 494                         VLC_VAR_ADDCHOICE, &val, &text );
 495             var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
 496             is_default_output_set = true;
 497             msg_Dbg( p_aout, "device supports 7.1 channels" );
 498         }
 499     }
 500
 501     /* Test for 3 Front 2 Rear support */
 502     i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
 503                           AOUT_CHAN_CENTER | AOUT_CHAN_REARLEFT |
 504                           AOUT_CHAN_REARRIGHT;
 505     if( p_aout->output.output.i_physical_channels == i_physical_channels )
 506     {
 507         if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 5,
 508                                p_aout->output.output.i_rate, true )
 509             == VLC_SUCCESS )
 510         {
 511             val.i_int = AOUT_VAR_3F2R;
 512             text.psz_string = _("3 Front 2 Rear");
 513             var_Change( p_aout, "audio-device",
 514                         VLC_VAR_ADDCHOICE, &val, &text );
 515             if(!is_default_output_set)
 516             {
 517                 var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
 518                 is_default_output_set = true;
 519             }
 520             msg_Dbg( p_aout, "device supports 5 channels" );
 521         }
 522     }
 523
 524     /* Test for 2 Front 2 Rear support */
 525     i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
 526                           AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
 527     if( ( p_aout->output.output.i_physical_channels & i_physical_channels )
 528         == i_physical_channels )
 529     {
 530         if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 4,
 531                                p_aout->output.output.i_rate, true )
 532             == VLC_SUCCESS )
 533         {
 534             val.i_int = AOUT_VAR_2F2R;
 535             text.psz_string = _("2 Front 2 Rear");
 536             var_Change( p_aout, "audio-device",
 537                         VLC_VAR_ADDCHOICE, &val, &text );
 538             if(!is_default_output_set)
 539             {
 540                 var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
 541                 is_default_output_set = true;
 542             }
 543             msg_Dbg( p_aout, "device supports 4 channels" );
 544         }
 545     }
 546
 547     /* Test for stereo support */
 548     i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
 549     if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 2,
 550                            p_aout->output.output.i_rate, true )
 551         == VLC_SUCCESS )
 552     {
 553         val.i_int = AOUT_VAR_STEREO;
 554         text.psz_string = _("Stereo");
 555         var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
 556         if(!is_default_output_set)
 557         {
 558             var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
 559             is_default_output_set = true;
 560             msg_Dbg( p_aout, "device supports 2 channels (DEFAULT!)" );
 561         }
 562         else msg_Dbg( p_aout, "device supports 2 channels" );
 563     }
 564
 565     /* Test for mono support */
 566     i_physical_channels = AOUT_CHAN_CENTER;
 567     if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 1,
 568                            p_aout->output.output.i_rate, true )
 569         == VLC_SUCCESS )
 570     {
 571         val.i_int = AOUT_VAR_MONO;
 572         text.psz_string = _("Mono");
 573         var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
 574         msg_Dbg( p_aout, "device supports 1 channel" );
 575     }
 576
 577     /* Check the speaker configuration to determine which channel config should
 578      * be the default */
 579     if FAILED( IDirectSound_GetSpeakerConfig( p_aout->output.p_sys->p_dsobject,
 580                                               &ui_speaker_config ) )
 581     {
 582         ui_speaker_config = DSSPEAKER_STEREO;
 583         msg_Dbg( p_aout, "GetSpeakerConfig failed" );
 584     }
 585     switch( DSSPEAKER_CONFIG(ui_speaker_config) )
 586     {
 587     case DSSPEAKER_7POINT1:
 588         msg_Dbg( p_aout, "Windows says your SpeakerConfig is 7.1" );
 589         val.i_int = AOUT_VAR_7_1;
 590         break;
 591     case DSSPEAKER_5POINT1:
 592         msg_Dbg( p_aout, "Windows says your SpeakerConfig is 5.1" );
 593         val.i_int = AOUT_VAR_5_1;
 594         break;
 595     case DSSPEAKER_QUAD:
 596         msg_Dbg( p_aout, "Windows says your SpeakerConfig is Quad" );
 597         val.i_int = AOUT_VAR_2F2R;
 598         break;
 599 #if 0 /* Lots of people just get their settings wrong and complain that
 600        * this is a problem with VLC so just don't ever set mono by default. */
 601     case DSSPEAKER_MONO:
 602         val.i_int = AOUT_VAR_MONO;
 603         break;
 604 #endif
 605     case DSSPEAKER_SURROUND:
 606         msg_Dbg( p_aout, "Windows says your SpeakerConfig is surround" );
 607     case DSSPEAKER_STEREO:
 608         msg_Dbg( p_aout, "Windows says your SpeakerConfig is stereo" );
 609     default:
 610         /* If nothing else is found, choose stereo output */
 611         val.i_int = AOUT_VAR_STEREO;
 612         break;
 613     }
 614
 615     /* Check if we want to override speaker config */
 616     switch( p_aout->output.p_sys->i_speaker_setup )
 617     {
 618     case 0: /* Default value aka Windows default speaker setup */
 619         break;
 620     case 1: /* Mono */
 621         msg_Dbg( p_aout, "SpeakerConfig is forced to Mono" );
 622         val.i_int = AOUT_VAR_MONO;
 623         break;
 624     case 2: /* Stereo */
 625         msg_Dbg( p_aout, "SpeakerConfig is forced to Stereo" );
 626         val.i_int = AOUT_VAR_STEREO;
 627         break;
 628     case 3: /* Quad */
 629         msg_Dbg( p_aout, "SpeakerConfig is forced to Quad" );
 630         val.i_int = AOUT_VAR_2F2R;
 631         break;
 632     case 4: /* 5.1 */
 633         msg_Dbg( p_aout, "SpeakerConfig is forced to 5.1" );
 634         val.i_int = AOUT_VAR_5_1;
 635         break;
 636     case 5: /* 7.1 */
 637         msg_Dbg( p_aout, "SpeakerConfig is forced to 7.1" );
 638         val.i_int = AOUT_VAR_7_1;
 639         break;
 640     default:
 641         msg_Dbg( p_aout, "SpeakerConfig is forced to non-existing value" );
 642         break;
 643     }
 644
 645     var_Set( p_aout, "audio-device", val );
 646
 647     /* Test for SPDIF support */
 648     if ( AOUT_FMT_NON_LINEAR( &p_aout->output.output ) )
 649     {
 650         if( CreateDSBuffer( p_aout, VLC_CODEC_SPDIFL,
 651                             p_aout->output.output.i_physical_channels,
 652                             aout_FormatNbChannels( &p_aout->output.output ),
 653                             p_aout->output.output.i_rate,
 654                             AOUT_SPDIF_SIZE, true )
 655             == VLC_SUCCESS )
 656         {
 657             msg_Dbg( p_aout, "device supports A/52 over S/PDIF" );
 658             val.i_int = AOUT_VAR_SPDIF;
 659             text.psz_string = _("A/52 over S/PDIF");
 660             var_Change( p_aout, "audio-device",
 661                         VLC_VAR_ADDCHOICE, &val, &text );
 662             if( config_GetInt( p_aout, "spdif" ) )
 663                 var_Set( p_aout, "audio-device", val );
 664         }
 665     }
 666
 667     var_Change( p_aout, "audio-device", VLC_VAR_CHOICESCOUNT, &val, NULL );
 668     if( val.i_int <= 0 )
 669     {
 670         /* Probe() has failed. */
 671         var_Destroy( p_aout, "audio-device" );
 672         return;
 673     }
 674
 675     var_AddCallback( p_aout, "audio-device", aout_ChannelsRestart, NULL );
 676     var_SetBool( p_aout, "intf-change", true );
 677 }
 678
 679 /*****************************************************************************
 680  * Play: we'll start playing the directsound buffer here because at least here
 681  *       we know the first buffer has been put in the aout fifo and we also
 682  *       know its date.
 683  *****************************************************************************/
 684 static void Play( aout_instance_t *p_aout )
 685 {
 686     if( !p_aout->output.p_sys->b_playing )
 687     {
 688         aout_buffer_t *p_buffer;
 689         int i;
 690
 691         p_aout->output.p_sys->b_playing = 1;
 692
 693         /* get the playing date of the first aout buffer */
 694         p_aout->output.p_sys->p_notif->start_date =
 695             aout_FifoFirstDate( p_aout, &p_aout->output.fifo );
 696
 697         /* fill in the first samples */
 698         for( i = 0; i < FRAMES_NUM; i++ )
 699         {
 700             p_buffer = aout_FifoPop( p_aout, &p_aout->output.fifo );
 701             if( !p_buffer ) break;
 702             FillBuffer( p_aout, i, p_buffer );
 703         }
 704
 705         /* wake up the audio output thread */
 706         SetEvent( p_aout->output.p_sys->p_notif->event );
 707     }
 708 }
 709
 710 /*****************************************************************************
 711  * CloseAudio: close the audio device
 712  *****************************************************************************/
 713 static void CloseAudio( vlc_object_t *p_this )
 714 {
 715     aout_instance_t * p_aout = (aout_instance_t *)p_this;
 716     aout_sys_t *p_sys = p_aout->output.p_sys;
 717
 718     msg_Dbg( p_aout, "closing audio device" );
 719
 720     /* kill the position notification thread, if any */
 721     if( p_sys->p_notif )
 722     {
 723         vlc_object_detach( p_sys->p_notif );
 724         vlc_object_kill( p_sys->p_notif );
 725         /* wake up the audio thread if needed */
 726         if( !p_sys->b_playing ) SetEvent( p_sys->p_notif->event );
 727
 728         vlc_thread_join( p_sys->p_notif );
 729         vlc_object_release( p_sys->p_notif );
 730     }
 731
 732     /* release the secondary buffer */
 733     DestroyDSBuffer( p_aout );
 734
 735     /* finally release the DirectSound object */
 736     if( p_sys->p_dsobject ) IDirectSound_Release( p_sys->p_dsobject );
 737
 738     /* free DSOUND.DLL */
 739     if( p_sys->hdsound_dll ) FreeLibrary( p_sys->hdsound_dll );
 740
 741     free( p_aout->output.p_sys->p_device_guid );
 742     free( p_sys );
 743 }
 744
 745 /*****************************************************************************
 746  * CallBackDirectSoundEnum: callback to enumerate available devices
 747  *****************************************************************************/
 748 static int CALLBACK CallBackDirectSoundEnum( LPGUID p_guid, LPCSTR psz_desc,
 749                                              LPCSTR psz_mod, LPVOID _p_aout )
 750 {
 751     VLC_UNUSED( psz_mod );
 752
 753     aout_instance_t *p_aout = (aout_instance_t *)_p_aout;
 754
 755     msg_Dbg( p_aout, "found device: %s", psz_desc );
 756
 757     if( p_aout->output.p_sys->i_device_id == 0 && p_guid )
 758     {
 759         p_aout->output.p_sys->p_device_guid = malloc( sizeof( GUID ) );
 760         *p_aout->output.p_sys->p_device_guid = *p_guid;
 761         msg_Dbg( p_aout, "using device: %s", psz_desc );
 762     }
 763
 764     p_aout->output.p_sys->i_device_id--;
 765     return 1;
 766 }
 767
 768 /*****************************************************************************
 769  * InitDirectSound: handle all the gory details of DirectSound initialisation
 770  *****************************************************************************/
 771 static int InitDirectSound( aout_instance_t *p_aout )
 772 {
 773     HRESULT (WINAPI *OurDirectSoundCreate)(LPGUID, LPDIRECTSOUND *, LPUNKNOWN);
 774     HRESULT (WINAPI *OurDirectSoundEnumerate)(LPDSENUMCALLBACK, LPVOID);
 775
 776     p_aout->output.p_sys->hdsound_dll = LoadLibrary("DSOUND.DLL");
 777     if( p_aout->output.p_sys->hdsound_dll == NULL )
 778     {
 779         msg_Warn( p_aout, "cannot open DSOUND.DLL" );
 780         goto error;
 781     }
 782
 783     OurDirectSoundCreate = (void *)
 784         GetProcAddress( p_aout->output.p_sys->hdsound_dll,
 785                         "DirectSoundCreate" );
 786     if( OurDirectSoundCreate == NULL )
 787     {
 788         msg_Warn( p_aout, "GetProcAddress FAILED" );
 789         goto error;
 790     }
 791
 792     /* Get DirectSoundEnumerate */
 793     OurDirectSoundEnumerate = (void *)
 794        GetProcAddress( p_aout->output.p_sys->hdsound_dll,
 795                        "DirectSoundEnumerateA" );
 796     if( OurDirectSoundEnumerate )
 797     {
 798         /* Attempt enumeration */
 799         if( FAILED( OurDirectSoundEnumerate( CallBackDirectSoundEnum,
 800                                              p_aout ) ) )
 801         {
 802             msg_Dbg( p_aout, "enumeration of DirectSound devices failed" );
 803         }
 804     }
 805
 806     /* Create the direct sound object */
 807     if FAILED( OurDirectSoundCreate( p_aout->output.p_sys->p_device_guid,
 808                                      &p_aout->output.p_sys->p_dsobject,
 809                                      NULL ) )
 810     {
 811         msg_Warn( p_aout, "cannot create a direct sound device" );
 812         goto error;
 813     }
 814
 815     /* Set DirectSound Cooperative level, ie what control we want over Windows
 816      * sound device. In our case, DSSCL_EXCLUSIVE means that we can modify the
 817      * settings of the primary buffer, but also that only the sound of our
 818      * application will be hearable when it will have the focus.
 819      * !!! (this is not really working as intended yet because to set the
 820      * cooperative level you need the window handle of your application, and
 821      * I don't know of any easy way to get it. Especially since we might play
 822      * sound without any video, and so what window handle should we use ???
 823      * The hack for now is to use the Desktop window handle - it seems to be
 824      * working */
 825     if( IDirectSound_SetCooperativeLevel( p_aout->output.p_sys->p_dsobject,
 826                                           GetDesktopWindow(),
 827                                           DSSCL_EXCLUSIVE) )
 828     {
 829         msg_Warn( p_aout, "cannot set direct sound cooperative level" );
 830     }
 831
 832     return VLC_SUCCESS;
 833
 834  error:
 835     p_aout->output.p_sys->p_dsobject = NULL;
 836     if( p_aout->output.p_sys->hdsound_dll )
 837     {
 838         FreeLibrary( p_aout->output.p_sys->hdsound_dll );
 839         p_aout->output.p_sys->hdsound_dll = NULL;
 840     }
 841     return VLC_EGENERIC;
 842
 843 }
 844
 845 /*****************************************************************************
 846  * CreateDSBuffer: Creates a direct sound buffer of the required format.
 847  *****************************************************************************
 848  * This function creates the buffer we'll use to play audio.
 849  * In DirectSound there are two kinds of buffers:
 850  * - the primary buffer: which is the actual buffer that the soundcard plays
 851  * - the secondary buffer(s): these buffers are the one actually used by
 852  *    applications and DirectSound takes care of mixing them into the primary.
 853  *
 854  * Once you create a secondary buffer, you cannot change its format anymore so
 855  * you have to release the current one and create another.
 856  *****************************************************************************/
 857 static int CreateDSBuffer( aout_instance_t *p_aout, int i_format,
 858                            int i_channels, int i_nb_channels, int i_rate,
 859                            int i_bytes_per_frame, bool b_probe )
 860 {
 861     WAVEFORMATEXTENSIBLE waveformat;
 862     DSBUFFERDESC         dsbdesc;
 863     unsigned int         i;
 864
 865     /* First set the sound buffer format */
 866     waveformat.dwChannelMask = 0;
 867     for( i = 0; i < sizeof(pi_channels_src)/sizeof(uint32_t); i++ )
 868     {
 869         if( i_channels & pi_channels_src[i] )
 870             waveformat.dwChannelMask |= pi_channels_in[i];
 871     }
 872
 873     switch( i_format )
 874     {
 875     case VLC_CODEC_SPDIFL:
 876         i_nb_channels = 2;
 877         /* To prevent channel re-ordering */
 878         waveformat.dwChannelMask = SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT;
 879         waveformat.Format.wBitsPerSample = 16;
 880         waveformat.Samples.wValidBitsPerSample =
 881             waveformat.Format.wBitsPerSample;
 882         waveformat.Format.wFormatTag = WAVE_FORMAT_DOLBY_AC3_SPDIF;
 883         waveformat.SubFormat = _KSDATAFORMAT_SUBTYPE_DOLBY_AC3_SPDIF;
 884         break;
 885
 886     case VLC_CODEC_FL32:
 887         waveformat.Format.wBitsPerSample = sizeof(float) * 8;
 888         waveformat.Samples.wValidBitsPerSample =
 889             waveformat.Format.wBitsPerSample;
 890         waveformat.Format.wFormatTag = WAVE_FORMAT_IEEE_FLOAT;
 891         waveformat.SubFormat = _KSDATAFORMAT_SUBTYPE_IEEE_FLOAT;
 892         break;
 893
 894     case VLC_CODEC_S16L:
 895         waveformat.Format.wBitsPerSample = 16;
 896         waveformat.Samples.wValidBitsPerSample =
 897             waveformat.Format.wBitsPerSample;
 898         waveformat.Format.wFormatTag = WAVE_FORMAT_PCM;
 899         waveformat.SubFormat = _KSDATAFORMAT_SUBTYPE_PCM;
 900         break;
 901     }
 902
 903     waveformat.Format.nChannels = i_nb_channels;
 904     waveformat.Format.nSamplesPerSec = i_rate;
 905     waveformat.Format.nBlockAlign =
 906         waveformat.Format.wBitsPerSample / 8 * i_nb_channels;
 907     waveformat.Format.nAvgBytesPerSec =
 908         waveformat.Format.nSamplesPerSec * waveformat.Format.nBlockAlign;
 909
 910     p_aout->output.p_sys->i_bits_per_sample = waveformat.Format.wBitsPerSample;
 911     p_aout->output.p_sys->i_channels = i_nb_channels;
 912
 913     /* Then fill in the direct sound descriptor */
 914     memset(&dsbdesc, 0, sizeof(DSBUFFERDESC));
 915     dsbdesc.dwSize = sizeof(DSBUFFERDESC);
 916     dsbdesc.dwFlags = DSBCAPS_GETCURRENTPOSITION2/* Better position accuracy */
 917                     | DSBCAPS_GLOBALFOCUS;      /* Allows background playing */
 918
 919     /* Only use the new WAVE_FORMAT_EXTENSIBLE format for multichannel audio */
 920     if( i_nb_channels <= 2 )
 921     {
 922         waveformat.Format.cbSize = 0;
 923     }
 924     else
 925     {
 926         waveformat.Format.wFormatTag = WAVE_FORMAT_EXTENSIBLE;
 927         waveformat.Format.cbSize =
 928             sizeof(WAVEFORMATEXTENSIBLE) - sizeof(WAVEFORMATEX);
 929
 930         /* Needed for 5.1 on emu101k */
 931         dsbdesc.dwFlags |= DSBCAPS_LOCHARDWARE;
 932     }
 933
 934     dsbdesc.dwBufferBytes = FRAMES_NUM * i_bytes_per_frame;   /* buffer size */
 935     dsbdesc.lpwfxFormat = (WAVEFORMATEX *)&waveformat;
 936
 937     if FAILED( IDirectSound_CreateSoundBuffer(
 938                    p_aout->output.p_sys->p_dsobject, &dsbdesc,
 939                    &p_aout->output.p_sys->p_dsbuffer, NULL) )
 940     {
 941         if( dsbdesc.dwFlags & DSBCAPS_LOCHARDWARE )
 942         {
 943             /* Try without DSBCAPS_LOCHARDWARE */
 944             dsbdesc.dwFlags &= ~DSBCAPS_LOCHARDWARE;
 945             if FAILED( IDirectSound_CreateSoundBuffer(
 946                    p_aout->output.p_sys->p_dsobject, &dsbdesc,
 947                    &p_aout->output.p_sys->p_dsbuffer, NULL) )
 948             {
 949                 return VLC_EGENERIC;
 950             }
 951             if( !b_probe )
 952                 msg_Dbg( p_aout, "couldn't use hardware sound buffer" );
 953         }
 954         else
 955         {
 956             return VLC_EGENERIC;
 957         }
 958     }
 959
 960     /* Stop here if we were just probing */
 961     if( b_probe )
 962     {
 963         IDirectSoundBuffer_Release( p_aout->output.p_sys->p_dsbuffer );
 964         p_aout->output.p_sys->p_dsbuffer = NULL;
 965         return VLC_SUCCESS;
 966     }
 967
 968     p_aout->output.p_sys->i_frame_size = i_bytes_per_frame;
 969     p_aout->output.p_sys->i_channel_mask = waveformat.dwChannelMask;
 970     p_aout->output.p_sys->b_chan_reorder =
 971         aout_CheckChannelReorder( pi_channels_in, pi_channels_out,
 972                                   waveformat.dwChannelMask, i_nb_channels,
 973                                   p_aout->output.p_sys->pi_chan_table );
 974
 975     if( p_aout->output.p_sys->b_chan_reorder )
 976     {
 977         msg_Dbg( p_aout, "channel reordering needed" );
 978     }
 979
 980     return VLC_SUCCESS;
 981 }
 982
 983 /*****************************************************************************
 984  * CreateDSBufferPCM: creates a PCM direct sound buffer.
 985  *****************************************************************************
 986  * We first try to create a WAVE_FORMAT_IEEE_FLOAT buffer if supported by
 987  * the hardware, otherwise we create a WAVE_FORMAT_PCM buffer.
 988  ****************************************************************************/
 989 static int CreateDSBufferPCM( aout_instance_t *p_aout, vlc_fourcc_t *i_format,
 990                               int i_channels, int i_nb_channels, int i_rate,
 991                               bool b_probe )
 992 {
 993     /* Float32 audio samples are not supported for 5.1 output on the emu101k */
 994     if( !var_GetBool( p_aout, "directx-audio-float32" ) ||
 995         i_nb_channels > 2 ||
 996         CreateDSBuffer( p_aout, VLC_CODEC_FL32,
 997                         i_channels, i_nb_channels, i_rate,
 998                         FRAME_SIZE * 4 * i_nb_channels, b_probe )
 999         != VLC_SUCCESS )
1000     {
1001         if ( CreateDSBuffer( p_aout, VLC_CODEC_S16L,
1002                              i_channels, i_nb_channels, i_rate,
1003                              FRAME_SIZE * 2 * i_nb_channels, b_probe )
1004              != VLC_SUCCESS )
1005         {
1006             return VLC_EGENERIC;
1007         }
1008         else
1009         {
1010             *i_format = VLC_CODEC_S16L;
1011             return VLC_SUCCESS;
1012         }
1013     }
1014     else
1015     {
1016         *i_format = VLC_CODEC_FL32;
1017         return VLC_SUCCESS;
1018     }
1019 }
1020
1021 /*****************************************************************************
1022  * DestroyDSBuffer
1023  *****************************************************************************
1024  * This function destroys the secondary buffer.
1025  *****************************************************************************/
1026 static void DestroyDSBuffer( aout_instance_t *p_aout )
1027 {
1028     if( p_aout->output.p_sys->p_dsbuffer )
1029     {
1030         IDirectSoundBuffer_Release( p_aout->output.p_sys->p_dsbuffer );
1031         p_aout->output.p_sys->p_dsbuffer = NULL;
1032     }
1033 }
1034
1035 /*****************************************************************************
1036  * FillBuffer: Fill in one of the direct sound frame buffers.
1037  *****************************************************************************
1038  * Returns VLC_SUCCESS on success.
1039  *****************************************************************************/
1040 static int FillBuffer( aout_instance_t *p_aout, int i_frame,
1041                        aout_buffer_t *p_buffer )
1042 {
1043     notification_thread_t *p_notif = p_aout->output.p_sys->p_notif;
1044     aout_sys_t *p_sys = p_aout->output.p_sys;
1045     void *p_write_position, *p_wrap_around;
1046     unsigned long l_bytes1, l_bytes2;
1047     HRESULT dsresult;
1048
1049     /* Before copying anything, we have to lock the buffer */
1050     dsresult = IDirectSoundBuffer_Lock(
1051                 p_sys->p_dsbuffer,                              /* DS buffer */
1052                 i_frame * p_notif->i_frame_size,             /* Start offset */
1053                 p_notif->i_frame_size,                    /* Number of bytes */
1054                 &p_write_position,                  /* Address of lock start */
1055                 &l_bytes1,       /* Count of bytes locked before wrap around */
1056                 &p_wrap_around,            /* Buffer adress (if wrap around) */
1057                 &l_bytes2,               /* Count of bytes after wrap around */
1058                 0 );                                                /* Flags */
1059     if( dsresult == DSERR_BUFFERLOST )
1060     {
1061         IDirectSoundBuffer_Restore( p_sys->p_dsbuffer );
1062         dsresult = IDirectSoundBuffer_Lock(
1063                                p_sys->p_dsbuffer,
1064                                i_frame * p_notif->i_frame_size,
1065                                p_notif->i_frame_size,
1066                                &p_write_position,
1067                                &l_bytes1,
1068                                &p_wrap_around,
1069                                &l_bytes2,
1070                                0 );
1071     }
1072     if( dsresult != DS_OK )
1073     {
1074         msg_Warn( p_notif, "cannot lock buffer" );
1075         if( p_buffer ) aout_BufferFree( p_buffer );
1076         return VLC_EGENERIC;
1077     }
1078
1079     if( p_buffer == NULL )
1080     {
1081         memset( p_write_position, 0, l_bytes1 );
1082     }
1083     else
1084     {
1085         if( p_sys->b_chan_reorder )
1086         {
1087             /* Do the channel reordering here */
1088             aout_ChannelReorder( p_buffer->p_buffer, p_buffer->i_buffer,
1089                                  p_sys->i_channels, p_sys->pi_chan_table,
1090                                  p_sys->i_bits_per_sample );
1091         }
1092
1093         vlc_memcpy( p_write_position, p_buffer->p_buffer, l_bytes1 );
1094         aout_BufferFree( p_buffer );
1095     }
1096
1097     /* Now the data has been copied, unlock the buffer */
1098     IDirectSoundBuffer_Unlock( p_sys->p_dsbuffer, p_write_position, l_bytes1,
1099                                p_wrap_around, l_bytes2 );
1100
1101     p_notif->i_write_slot = (i_frame + 1) % FRAMES_NUM;
1102     return VLC_SUCCESS;
1103 }
1104
1105 /*****************************************************************************
1106  * DirectSoundThread: this thread will capture play notification events.
1107  *****************************************************************************
1108  * We use this thread to emulate a callback mechanism. The thread probes for
1109  * event notification and fills up the DS secondary buffer when needed.
1110  *****************************************************************************/
1111 static void* DirectSoundThread( vlc_object_t *p_this )
1112 {
1113     notification_thread_t *p_notif = (notification_thread_t*)p_this;
1114     aout_instance_t *p_aout = p_notif->p_aout;
1115     bool b_sleek;
1116     mtime_t last_time;
1117     HRESULT dsresult;
1118     long l_queued = 0;
1119     int canc = vlc_savecancel ();
1120
1121     /* We don't want any resampling when using S/PDIF output */
1122     b_sleek = p_aout->output.output.i_format == VLC_CODEC_SPDIFL;
1123
1124     msg_Dbg( p_notif, "DirectSoundThread ready" );
1125
1126     /* Wait here until Play() is called */
1127     WaitForSingleObject( p_notif->event, INFINITE );
1128
1129     if( vlc_object_alive (p_notif) )
1130     {
1131         mwait( p_notif->start_date - AOUT_PTS_TOLERANCE / 2 );
1132
1133         /* start playing the buffer */
1134         dsresult = IDirectSoundBuffer_Play( p_aout->output.p_sys->p_dsbuffer,
1135                                         0,                         /* Unused */
1136                                         0,                         /* Unused */
1137                                         DSBPLAY_LOOPING );          /* Flags */
1138         if( dsresult == DSERR_BUFFERLOST )
1139         {
1140             IDirectSoundBuffer_Restore( p_aout->output.p_sys->p_dsbuffer );
1141             dsresult = IDirectSoundBuffer_Play(
1142                                             p_aout->output.p_sys->p_dsbuffer,
1143                                             0,                     /* Unused */
1144                                             0,                     /* Unused */
1145                                             DSBPLAY_LOOPING );      /* Flags */
1146         }
1147         if( dsresult != DS_OK )
1148         {
1149             msg_Err( p_aout, "cannot start playing buffer" );
1150         }
1151     }
1152     last_time = mdate();
1153
1154     while( vlc_object_alive (p_notif) )
1155     {
1156         long l_read, l_free_slots;
1157         unsigned i_frame_siz = p_aout->output.i_nb_samples;
1158         mtime_t mtime = mdate();
1159         int i;
1160
1161         /*
1162          * Fill in as much audio data as we can in our circular buffer
1163          */
1164
1165         /* Find out current play position */
1166         if FAILED( IDirectSoundBuffer_GetCurrentPosition(
1167                    p_aout->output.p_sys->p_dsbuffer, &l_read, NULL ) )
1168         {
1169             msg_Err( p_aout, "GetCurrentPosition() failed!" );
1170             l_read = 0;
1171         }
1172
1173         /* Detect underruns */
1174         if( l_queued && mtime - last_time >
1175             INT64_C(1000000) * l_queued / p_aout->output.output.i_rate )
1176         {
1177             msg_Dbg( p_aout, "detected underrun!" );
1178         }
1179         last_time = mtime;
1180
1181         /* Try to fill in as many frame buffers as possible */
1182         l_read /= (p_aout->output.output.i_bytes_per_frame /
1183             p_aout->output.output.i_frame_length);
1184         l_queued = p_notif->i_write_slot * i_frame_siz - l_read;
1185         if( l_queued < 0 ) l_queued += (i_frame_siz * FRAMES_NUM);
1186         l_free_slots = (FRAMES_NUM * i_frame_siz - l_queued) / i_frame_siz;
1187
1188         for( i = 0; i < l_free_slots; i++ )
1189         {
1190             aout_buffer_t *p_buffer = aout_OutputNextBuffer( p_aout,
1191                 mtime + INT64_C(1000000) * (i * i_frame_siz + l_queued) /
1192                 p_aout->output.output.i_rate, b_sleek );
1193
1194             /* If there is no audio data available and we have some buffered
1195              * already, then just wait for the next time */
1196             if( !p_buffer && (i || l_queued / i_frame_siz) ) break;
1197
1198             if( FillBuffer( p_aout, p_notif->i_write_slot % FRAMES_NUM,
1199                             p_buffer ) != VLC_SUCCESS ) break;
1200         }
1201
1202         /* Sleep a reasonable amount of time */
1203         l_queued += (i * i_frame_siz);
1204         msleep( INT64_C(1000000) * l_queued / p_aout->output.output.i_rate / 2 );
1205     }
1206
1207     /* make sure the buffer isn't playing */
1208     IDirectSoundBuffer_Stop( p_aout->output.p_sys->p_dsbuffer );
1209
1210     /* free the event */
1211     CloseHandle( p_notif->event );
1212
1213     vlc_restorecancel (canc);
1214     msg_Dbg( p_notif, "DirectSoundThread exiting" );
1215     return NULL;
1216 }