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