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 VideoLAN
   5  * $Id: directx.c,v 1.22 2003/07/11 23:14:03 gbazin Exp $
   6  *
   7  * Authors: Gildas Bazin <gbazin@netcourrier.com>
   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., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27 #include <errno.h>                                                 /* ENOMEM */
  28 #include <fcntl.h>                                       /* open(), O_WRONLY */
  29 #include <string.h>                                            /* strerror() */
  30
  31 #include <stdlib.h>                            /* calloc(), malloc(), free() */
  32
  33 #include <vlc/vlc.h>
  34 #include <vlc/aout.h>
  35 #include "aout_internal.h"
  36
  37 #include <windows.h>
  38 #include <mmsystem.h>
  39 #include <dsound.h>
  40
  41 #define FRAME_SIZE 2048              /* The size is in samples, not in bytes */
  42 #define FRAMES_NUM 8
  43
  44 /* frame buffer status */
  45 #define FRAME_QUEUED 0
  46 #define FRAME_EMPTY 1
  47
  48 /*****************************************************************************
  49  * DirectSound GUIDs.
  50  * Defining them here allows us to get rid of the dxguid library during
  51  * the linking stage.
  52  *****************************************************************************/
  53 #include <initguid.h>
  54 DEFINE_GUID(IID_IDirectSoundNotify, 0xb0210783, 0x89cd, 0x11d0, 0xaf, 0x8, 0x0, 0xa0, 0xc9, 0x25, 0xcd, 0x16);
  55
  56 /*****************************************************************************
  57  * Useful macros
  58  *****************************************************************************/
  59 #ifndef WAVE_FORMAT_IEEE_FLOAT
  60 #   define WAVE_FORMAT_IEEE_FLOAT 0x0003
  61 #endif
  62
  63 #ifndef WAVE_FORMAT_DOLBY_AC3_SPDIF
  64 #   define WAVE_FORMAT_DOLBY_AC3_SPDIF 0x0092
  65 #endif
  66
  67 #ifndef WAVE_FORMAT_EXTENSIBLE
  68 #define  WAVE_FORMAT_EXTENSIBLE   0xFFFE
  69 #endif
  70
  71 #ifndef SPEAKER_FRONT_LEFT
  72 #   define SPEAKER_FRONT_LEFT             0x1
  73 #   define SPEAKER_FRONT_RIGHT            0x2
  74 #   define SPEAKER_FRONT_CENTER           0x4
  75 #   define SPEAKER_LOW_FREQUENCY          0x8
  76 #   define SPEAKER_BACK_LEFT              0x10
  77 #   define SPEAKER_BACK_RIGHT             0x20
  78 #   define SPEAKER_FRONT_LEFT_OF_CENTER   0x40
  79 #   define SPEAKER_FRONT_RIGHT_OF_CENTER  0x80
  80 #   define SPEAKER_BACK_CENTER            0x100
  81 #   define SPEAKER_SIDE_LEFT              0x200
  82 #   define SPEAKER_SIDE_RIGHT             0x400
  83 #   define SPEAKER_TOP_CENTER             0x800
  84 #   define SPEAKER_TOP_FRONT_LEFT         0x1000
  85 #   define SPEAKER_TOP_FRONT_CENTER       0x2000
  86 #   define SPEAKER_TOP_FRONT_RIGHT        0x4000
  87 #   define SPEAKER_TOP_BACK_LEFT          0x8000
  88 #   define SPEAKER_TOP_BACK_CENTER        0x10000
  89 #   define SPEAKER_TOP_BACK_RIGHT         0x20000
  90 #   define SPEAKER_RESERVED               0x80000000
  91 #endif
  92
  93 #ifndef DSSPEAKER_HEADPHONE
  94 #   define DSSPEAKER_HEADPHONE         0x00000001
  95 #endif
  96 #ifndef DSSPEAKER_MONO
  97 #   define DSSPEAKER_MONO              0x00000002
  98 #endif
  99 #ifndef DSSPEAKER_QUAD
 100 #   define DSSPEAKER_QUAD              0x00000003
 101 #endif
 102 #ifndef DSSPEAKER_STEREO
 103 #   define DSSPEAKER_STEREO            0x00000004
 104 #endif
 105 #ifndef DSSPEAKER_SURROUND
 106 #   define DSSPEAKER_SURROUND          0x00000005
 107 #endif
 108 #ifndef DSSPEAKER_5POINT1
 109 #   define DSSPEAKER_5POINT1           0x00000006
 110 #endif
 111
 112 #ifndef _WAVEFORMATEXTENSIBLE_
 113 typedef struct {
 114     WAVEFORMATEX    Format;
 115     union {
 116         WORD wValidBitsPerSample;       /* bits of precision  */
 117         WORD wSamplesPerBlock;          /* valid if wBitsPerSample==0 */
 118         WORD wReserved;                 /* If neither applies, set to zero. */
 119     } Samples;
 120     DWORD           dwChannelMask;      /* which channels are */
 121                                         /* present in stream  */
 122     GUID            SubFormat;
 123 } WAVEFORMATEXTENSIBLE, *PWAVEFORMATEXTENSIBLE;
 124 #endif
 125
 126 DEFINE_GUID( _KSDATAFORMAT_SUBTYPE_IEEE_FLOAT, WAVE_FORMAT_IEEE_FLOAT, 0x0000, 0x0010, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 );
 127 DEFINE_GUID( _KSDATAFORMAT_SUBTYPE_PCM, WAVE_FORMAT_PCM, 0x0000, 0x0010, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 );
 128 DEFINE_GUID( _KSDATAFORMAT_SUBTYPE_DOLBY_AC3_SPDIF, WAVE_FORMAT_DOLBY_AC3_SPDIF, 0x0000, 0x0010, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 );
 129
 130 /*****************************************************************************
 131  * notification_thread_t: DirectX event thread
 132  *****************************************************************************/
 133 typedef struct notification_thread_t
 134 {
 135     VLC_COMMON_MEMBERS
 136
 137     aout_instance_t * p_aout;
 138     int i_frame_status[FRAMES_NUM];           /* status of each frame buffer */
 139     DSBPOSITIONNOTIFY p_events[FRAMES_NUM];      /* play notification events */
 140     int i_frame_size;                         /* Size in bytes of one frame */
 141
 142     mtime_t start_date;
 143
 144 } notification_thread_t;
 145
 146 /*****************************************************************************
 147  * aout_sys_t: directx audio output method descriptor
 148  *****************************************************************************
 149  * This structure is part of the audio output thread descriptor.
 150  * It describes the direct sound specific properties of an audio device.
 151  *****************************************************************************/
 152 struct aout_sys_t
 153 {
 154     HINSTANCE           hdsound_dll;      /* handle of the opened dsound dll */
 155     LPDIRECTSOUND       p_dsobject;              /* main Direct Sound object */
 156     LPDIRECTSOUNDBUFFER p_dsbuffer;   /* the sound buffer we use (direct sound
 157                                        * takes care of mixing all the
 158                                        * secondary buffers into the primary) */
 159
 160     LPDIRECTSOUNDNOTIFY p_dsnotify;         /* the position notify interface */
 161     notification_thread_t *p_notif;                  /* DirectSoundThread id */
 162
 163     int b_playing;                                         /* playing status */
 164
 165     int i_frame_size;                         /* Size in bytes of one frame */
 166
 167     vlc_bool_t b_chan_reorder;              /* do we need channel reordering */
 168     int *pi_chan_table;
 169     uint32_t i_channel_mask;
 170 };
 171
 172 static const uint32_t pi_channels_in[] =
 173     { AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT,
 174       AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT,
 175       AOUT_CHAN_CENTER, AOUT_CHAN_LFE };
 176 static const uint32_t pi_channels_out[] =
 177     { SPEAKER_FRONT_LEFT, SPEAKER_FRONT_RIGHT,
 178       SPEAKER_BACK_LEFT, SPEAKER_BACK_RIGHT,
 179       SPEAKER_FRONT_CENTER, SPEAKER_LOW_FREQUENCY };
 180 static const uint32_t pi_channels_ordered[] =
 181     { SPEAKER_FRONT_LEFT, SPEAKER_FRONT_RIGHT, SPEAKER_FRONT_CENTER,
 182       SPEAKER_LOW_FREQUENCY,
 183       SPEAKER_BACK_LEFT, SPEAKER_BACK_RIGHT };
 184
 185 /*****************************************************************************
 186  * Local prototypes.
 187  *****************************************************************************/
 188 static int  OpenAudio  ( vlc_object_t * );
 189 static void CloseAudio ( vlc_object_t * );
 190 static void Play       ( aout_instance_t * );
 191
 192 /* local functions */
 193 static void Probe             ( aout_instance_t * );
 194 static int  InitDirectSound   ( aout_instance_t * );
 195 static int  CreateDSBuffer    ( aout_instance_t *, int, int, int, int, int, vlc_bool_t );
 196 static int  CreateDSBufferPCM ( aout_instance_t *, int*, int, int, int, vlc_bool_t );
 197 static void DestroyDSBuffer   ( aout_instance_t * );
 198 static void DirectSoundThread ( notification_thread_t * );
 199 static int  FillBuffer        ( aout_instance_t *, int, aout_buffer_t * );
 200
 201 static void CheckReordering   ( aout_instance_t *, int );
 202 static void InterleaveFloat32 ( float *, float *, int *, int );
 203 static void InterleaveS16     ( int16_t *, int16_t *, int *, int );
 204
 205 /*****************************************************************************
 206  * Module descriptor
 207  *****************************************************************************/
 208 vlc_module_begin();
 209     set_description( _("DirectX audio output") );
 210     set_capability( "audio output", 100 );
 211     add_shortcut( "directx" );
 212     set_callbacks( OpenAudio, CloseAudio );
 213 vlc_module_end();
 214
 215 /*****************************************************************************
 216  * OpenAudio: open the audio device
 217  *****************************************************************************
 218  * This function opens and setups Direct Sound.
 219  *****************************************************************************/
 220 static int OpenAudio( vlc_object_t *p_this )
 221 {
 222     aout_instance_t * p_aout = (aout_instance_t *)p_this;
 223     vlc_value_t val;
 224     int i;
 225
 226     msg_Dbg( p_aout, "OpenAudio" );
 227
 228    /* Allocate structure */
 229     p_aout->output.p_sys = malloc( sizeof( aout_sys_t ) );
 230     if( p_aout->output.p_sys == NULL )
 231     {
 232         msg_Err( p_aout, "out of memory" );
 233         return VLC_EGENERIC;
 234     }
 235
 236     /* Initialize some variables */
 237     p_aout->output.p_sys->p_dsobject = NULL;
 238     p_aout->output.p_sys->p_dsbuffer = NULL;
 239     p_aout->output.p_sys->p_dsnotify = NULL;
 240     p_aout->output.p_sys->p_notif = NULL;
 241     p_aout->output.p_sys->b_playing = 0;
 242     p_aout->output.p_sys->pi_chan_table = NULL;
 243
 244     p_aout->output.pf_play = Play;
 245     aout_VolumeSoftInit( p_aout );
 246
 247     /* Initialise DirectSound */
 248     if( InitDirectSound( p_aout ) )
 249     {
 250         msg_Err( p_aout, "cannot initialize DirectSound" );
 251         goto error;
 252     }
 253
 254     if( var_Type( p_aout, "audio-device" ) == 0 )
 255     {
 256         Probe( p_aout );
 257     }
 258
 259     if( var_Get( p_aout, "audio-device", &val ) < 0 )
 260     {
 261         /* Probe() has failed. */
 262         goto error;
 263     }
 264
 265     /* Now we need to setup our DirectSound play notification structure */
 266     p_aout->output.p_sys->p_notif =
 267         vlc_object_create( p_aout, sizeof(notification_thread_t) );
 268     p_aout->output.p_sys->p_notif->p_aout = p_aout;
 269
 270     /* Then create the notification events */
 271     for( i = 0; i < FRAMES_NUM; i++ )
 272         p_aout->output.p_sys->p_notif->p_events[i].hEventNotify =
 273             CreateEvent( NULL, FALSE, FALSE, NULL );
 274
 275     /* Open the device */
 276     if( val.i_int == AOUT_VAR_SPDIF )
 277     {
 278         p_aout->output.output.i_format = VLC_FOURCC('s','p','d','i');
 279
 280         /* Calculate the frame size in bytes */
 281         p_aout->output.i_nb_samples = A52_FRAME_NB;
 282         p_aout->output.output.i_bytes_per_frame = AOUT_SPDIF_SIZE;
 283         p_aout->output.output.i_frame_length = A52_FRAME_NB;
 284         p_aout->output.p_sys->i_frame_size =
 285             p_aout->output.output.i_bytes_per_frame;
 286
 287         if( CreateDSBuffer( p_aout, VLC_FOURCC('s','p','d','i'),
 288                             p_aout->output.output.i_physical_channels,
 289                             aout_FormatNbChannels( &p_aout->output.output ),
 290                             p_aout->output.output.i_rate,
 291                             p_aout->output.p_sys->i_frame_size, VLC_FALSE )
 292             != VLC_SUCCESS )
 293         {
 294             msg_Err( p_aout, "cannot open directx audio device" );
 295             free( p_aout->output.p_sys );
 296             return VLC_EGENERIC;
 297         }
 298
 299         aout_VolumeNoneInit( p_aout );
 300     }
 301     else
 302     {
 303         if( val.i_int == AOUT_VAR_5_1 )
 304         {
 305             p_aout->output.output.i_physical_channels
 306                 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
 307                    | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT
 308                    | AOUT_CHAN_LFE;
 309         }
 310         else if( val.i_int == AOUT_VAR_2F2R )
 311         {
 312             p_aout->output.output.i_physical_channels
 313                 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT
 314                    | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
 315         }
 316         else if( val.i_int == AOUT_VAR_MONO )
 317         {
 318             p_aout->output.output.i_physical_channels = AOUT_CHAN_CENTER;
 319         }
 320         else
 321         {
 322             p_aout->output.output.i_physical_channels
 323                 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
 324         }
 325
 326         if( CreateDSBufferPCM( p_aout, &p_aout->output.output.i_format,
 327                                p_aout->output.output.i_physical_channels,
 328                                aout_FormatNbChannels( &p_aout->output.output ),
 329                                p_aout->output.output.i_rate, VLC_FALSE )
 330             != VLC_SUCCESS )
 331         {
 332             msg_Err( p_aout, "cannot open directx audio device" );
 333             free( p_aout->output.p_sys );
 334             return VLC_EGENERIC;
 335         }
 336
 337         /* Calculate the frame size in bytes */
 338         p_aout->output.i_nb_samples = FRAME_SIZE;
 339         aout_FormatPrepare( &p_aout->output.output );
 340         p_aout->output.p_sys->i_frame_size =
 341             FRAME_SIZE * p_aout->output.output.i_bytes_per_frame;
 342
 343         aout_VolumeSoftInit( p_aout );
 344     }
 345
 346     /* then launch the notification thread */
 347     msg_Dbg( p_aout, "creating DirectSoundThread" );
 348     if( vlc_thread_create( p_aout->output.p_sys->p_notif,
 349                            "DirectSound Notification Thread",
 350                            DirectSoundThread,
 351                            VLC_THREAD_PRIORITY_HIGHEST, VLC_FALSE ) )
 352     {
 353         msg_Err( p_aout, "cannot create DirectSoundThread" );
 354         goto error;
 355     }
 356
 357     vlc_object_attach( p_aout->output.p_sys->p_notif, p_aout );
 358
 359     return VLC_SUCCESS;
 360
 361  error:
 362     CloseAudio( VLC_OBJECT(p_aout) );
 363     return VLC_EGENERIC;
 364 }
 365
 366 /*****************************************************************************
 367  * Probe: probe the audio device for available formats and channels
 368  *****************************************************************************/
 369 static void Probe( aout_instance_t * p_aout )
 370 {
 371     vlc_value_t val, text;
 372     int i_format;
 373     unsigned int i_physical_channels;
 374     DWORD ui_speaker_config;
 375
 376     var_Create( p_aout, "audio-device", VLC_VAR_INTEGER | VLC_VAR_HASCHOICE );
 377     text.psz_string = _("Audio device");
 378     var_Change( p_aout, "audio-device", VLC_VAR_SETTEXT, &text, NULL );
 379
 380     /* Test for 5.1 support */
 381     i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
 382                           AOUT_CHAN_CENTER | AOUT_CHAN_REARLEFT |
 383                           AOUT_CHAN_REARRIGHT | AOUT_CHAN_LFE;
 384     if( p_aout->output.output.i_physical_channels == i_physical_channels )
 385     {
 386         if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 6,
 387                                p_aout->output.output.i_rate, VLC_TRUE )
 388             == VLC_SUCCESS )
 389         {
 390             val.i_int = AOUT_VAR_5_1;
 391             text.psz_string = N_("5.1");
 392             var_Change( p_aout, "audio-device",
 393                         VLC_VAR_ADDCHOICE, &val, &text );
 394             msg_Dbg( p_aout, "device supports 5.1 channels" );
 395         }
 396     }
 397
 398     /* Test for 2 Front 2 Rear support */
 399     i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
 400                           AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
 401     if( ( p_aout->output.output.i_physical_channels & i_physical_channels )
 402         == i_physical_channels )
 403     {
 404         if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 4,
 405                                p_aout->output.output.i_rate, VLC_TRUE )
 406             == VLC_SUCCESS )
 407         {
 408             val.i_int = AOUT_VAR_2F2R;
 409             text.psz_string = N_("2 Front 2 Rear");
 410             var_Change( p_aout, "audio-device",
 411                         VLC_VAR_ADDCHOICE, &val, &text );
 412             msg_Dbg( p_aout, "device supports 4 channels" );
 413         }
 414     }
 415
 416     /* Test for stereo support */
 417     i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
 418     if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 2,
 419                            p_aout->output.output.i_rate, VLC_TRUE )
 420         == VLC_SUCCESS )
 421     {
 422         val.i_int = AOUT_VAR_STEREO;
 423         text.psz_string = N_("Stereo");
 424         var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
 425         msg_Dbg( p_aout, "device supports 2 channels" );
 426     }
 427
 428     /* Test for mono support */
 429     i_physical_channels = AOUT_CHAN_CENTER;
 430     if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 1,
 431                            p_aout->output.output.i_rate, VLC_TRUE )
 432         == VLC_SUCCESS )
 433     {
 434         val.i_int = AOUT_VAR_MONO;
 435         text.psz_string = N_("Mono");
 436         var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
 437         msg_Dbg( p_aout, "device supports 1 channel" );
 438     }
 439
 440     /* Check the speaker configuration to determine which channel config should
 441      * be the default */
 442     if FAILED( IDirectSound_GetSpeakerConfig( p_aout->output.p_sys->p_dsobject,
 443                                               &ui_speaker_config ) )
 444     {
 445         ui_speaker_config = DSSPEAKER_STEREO;
 446     }
 447     switch( DSSPEAKER_CONFIG(ui_speaker_config) )
 448     {
 449     case DSSPEAKER_5POINT1:
 450         val.i_int = AOUT_VAR_5_1;
 451         break;
 452     case DSSPEAKER_QUAD:
 453         val.i_int = AOUT_VAR_2F2R;
 454         break;
 455     case DSSPEAKER_MONO:
 456         val.i_int = AOUT_VAR_MONO;
 457         break;
 458     case DSSPEAKER_SURROUND:
 459     case DSSPEAKER_STEREO:
 460     default:
 461         val.i_int = AOUT_VAR_STEREO;
 462         break;
 463     }
 464     var_Set( p_aout, "audio-device", val );
 465
 466     /* Test for SPDIF support */
 467     if ( AOUT_FMT_NON_LINEAR( &p_aout->output.output ) )
 468     {
 469         if( CreateDSBuffer( p_aout, VLC_FOURCC('s','p','d','i'),
 470                             p_aout->output.output.i_physical_channels,
 471                             aout_FormatNbChannels( &p_aout->output.output ),
 472                             p_aout->output.output.i_rate,
 473                             AOUT_SPDIF_SIZE, VLC_TRUE )
 474             == VLC_SUCCESS )
 475         {
 476             msg_Dbg( p_aout, "device supports A/52 over S/PDIF" );
 477             val.i_int = AOUT_VAR_SPDIF;
 478             text.psz_string = N_("A/52 over S/PDIF");
 479             var_Change( p_aout, "audio-device",
 480                         VLC_VAR_ADDCHOICE, &val, &text );
 481             if( config_GetInt( p_aout, "spdif" ) )
 482                 var_Set( p_aout, "audio-device", val );
 483         }
 484     }
 485
 486     var_Change( p_aout, "audio-device", VLC_VAR_CHOICESCOUNT, &val, NULL );
 487     if( val.i_int <= 0 )
 488     {
 489         /* Probe() has failed. */
 490         var_Destroy( p_aout, "audio-device" );
 491         return;
 492     }
 493
 494     var_AddCallback( p_aout, "audio-device", aout_ChannelsRestart, NULL );
 495
 496     val.b_bool = VLC_TRUE;
 497     var_Set( p_aout, "intf-change", val );
 498 }
 499
 500 /*****************************************************************************
 501  * Play: we'll start playing the directsound buffer here because at least here
 502  *       we know the first buffer has been put in the aout fifo and we also
 503  *       know its date.
 504  *****************************************************************************/
 505 static void Play( aout_instance_t *p_aout )
 506 {
 507     if( !p_aout->output.p_sys->b_playing )
 508     {
 509         aout_buffer_t *p_buffer;
 510
 511         p_aout->output.p_sys->b_playing = 1;
 512
 513         /* get the playing date of the first aout buffer */
 514         p_aout->output.p_sys->p_notif->start_date =
 515             aout_FifoFirstDate( p_aout, &p_aout->output.fifo );
 516
 517         /* fill in the first samples */
 518         p_buffer = aout_FifoPop( p_aout, &p_aout->output.fifo );
 519         FillBuffer( p_aout, 0, p_buffer );
 520
 521         /* wake up the audio output thread */
 522         SetEvent( p_aout->output.p_sys->p_notif->p_events[0].hEventNotify );
 523     }
 524 }
 525
 526 /*****************************************************************************
 527  * CloseAudio: close the audio device
 528  *****************************************************************************/
 529 static void CloseAudio( vlc_object_t *p_this )
 530 {
 531     aout_instance_t * p_aout = (aout_instance_t *)p_this;
 532
 533     msg_Dbg( p_aout, "CloseAudio" );
 534
 535     /* kill the position notification thread, if any */
 536     if( p_aout->output.p_sys->p_notif )
 537     {
 538         vlc_object_detach( p_aout->output.p_sys->p_notif );
 539         if( p_aout->output.p_sys->p_notif->b_thread )
 540         {
 541             p_aout->output.p_sys->p_notif->b_die = 1;
 542
 543             if( !p_aout->output.p_sys->b_playing )
 544                 /* wake up the audio thread */
 545                 SetEvent(
 546                     p_aout->output.p_sys->p_notif->p_events[0].hEventNotify );
 547
 548             vlc_thread_join( p_aout->output.p_sys->p_notif );
 549         }
 550         vlc_object_destroy( p_aout->output.p_sys->p_notif );
 551     }
 552
 553     /* release the secondary buffer */
 554     DestroyDSBuffer( p_aout );
 555
 556     /* finally release the DirectSound object */
 557     if( p_aout->output.p_sys->p_dsobject )
 558         IDirectSound_Release( p_aout->output.p_sys->p_dsobject );
 559
 560     /* free DSOUND.DLL */
 561     if( p_aout->output.p_sys->hdsound_dll )
 562        FreeLibrary( p_aout->output.p_sys->hdsound_dll );
 563
 564     if( p_aout->output.p_sys->pi_chan_table )
 565         free( p_aout->output.p_sys->pi_chan_table );
 566
 567     free( p_aout->output.p_sys );
 568 }
 569
 570 /*****************************************************************************
 571  * InitDirectSound: handle all the gory details of DirectSound initialisation
 572  *****************************************************************************/
 573 static int InitDirectSound( aout_instance_t *p_aout )
 574 {
 575     HRESULT (WINAPI *OurDirectSoundCreate)(LPGUID, LPDIRECTSOUND *, LPUNKNOWN);
 576
 577     p_aout->output.p_sys->hdsound_dll = LoadLibrary("DSOUND.DLL");
 578     if( p_aout->output.p_sys->hdsound_dll == NULL )
 579     {
 580         msg_Warn( p_aout, "cannot open DSOUND.DLL" );
 581         goto error;
 582     }
 583
 584     OurDirectSoundCreate = (void *)GetProcAddress(
 585                                            p_aout->output.p_sys->hdsound_dll,
 586                                            "DirectSoundCreate" );
 587     if( OurDirectSoundCreate == NULL )
 588     {
 589         msg_Warn( p_aout, "GetProcAddress FAILED" );
 590         goto error;
 591     }
 592
 593     /* Create the direct sound object */
 594     if FAILED( OurDirectSoundCreate( NULL, &p_aout->output.p_sys->p_dsobject,
 595                                      NULL ) )
 596     {
 597         msg_Warn( p_aout, "cannot create a direct sound device" );
 598         goto error;
 599     }
 600
 601     /* Set DirectSound Cooperative level, ie what control we want over Windows
 602      * sound device. In our case, DSSCL_EXCLUSIVE means that we can modify the
 603      * settings of the primary buffer, but also that only the sound of our
 604      * application will be hearable when it will have the focus.
 605      * !!! (this is not really working as intended yet because to set the
 606      * cooperative level you need the window handle of your application, and
 607      * I don't know of any easy way to get it. Especially since we might play
 608      * sound without any video, and so what window handle should we use ???
 609      * The hack for now is to use the Desktop window handle - it seems to be
 610      * working */
 611     if( IDirectSound_SetCooperativeLevel( p_aout->output.p_sys->p_dsobject,
 612                                           GetDesktopWindow(),
 613                                           DSSCL_EXCLUSIVE) )
 614     {
 615         msg_Warn( p_aout, "cannot set direct sound cooperative level" );
 616     }
 617
 618     return VLC_SUCCESS;
 619
 620  error:
 621     p_aout->output.p_sys->p_dsobject = NULL;
 622     if( p_aout->output.p_sys->hdsound_dll )
 623     {
 624         FreeLibrary( p_aout->output.p_sys->hdsound_dll );
 625         p_aout->output.p_sys->hdsound_dll = NULL;
 626     }
 627     return VLC_EGENERIC;
 628
 629 }
 630
 631 /*****************************************************************************
 632  * CreateDSBuffer: Creates a direct sound buffer of the required format.
 633  *****************************************************************************
 634  * This function creates the buffer we'll use to play audio.
 635  * In DirectSound there are two kinds of buffers:
 636  * - the primary buffer: which is the actual buffer that the soundcard plays
 637  * - the secondary buffer(s): these buffers are the one actually used by
 638  *    applications and DirectSound takes care of mixing them into the primary.
 639  *
 640  * Once you create a secondary buffer, you cannot change its format anymore so
 641  * you have to release the current one and create another.
 642  *****************************************************************************/
 643 static int CreateDSBuffer( aout_instance_t *p_aout, int i_format,
 644                            int i_channels, int i_nb_channels, int i_rate,
 645                            int i_bytes_per_frame, vlc_bool_t b_probe )
 646 {
 647     WAVEFORMATEXTENSIBLE waveformat;
 648     DSBUFFERDESC         dsbdesc;
 649     unsigned int         i;
 650
 651     /* First set the sound buffer format */
 652     waveformat.dwChannelMask = 0;
 653     for( i = 0; i < sizeof(pi_channels_in)/sizeof(uint32_t); i++ )
 654     {
 655         if( i_channels & pi_channels_in[i] )
 656             waveformat.dwChannelMask |= pi_channels_out[i];
 657     }
 658
 659     switch( i_format )
 660     {
 661     case VLC_FOURCC('s','p','d','i'):
 662         i_nb_channels = 2;
 663         /* To prevent channel re-ordering */
 664         waveformat.dwChannelMask = SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT;
 665         waveformat.Format.wBitsPerSample = 16;
 666         waveformat.Samples.wValidBitsPerSample =
 667             waveformat.Format.wBitsPerSample;
 668         waveformat.Format.wFormatTag = WAVE_FORMAT_DOLBY_AC3_SPDIF;
 669         waveformat.SubFormat = _KSDATAFORMAT_SUBTYPE_DOLBY_AC3_SPDIF;
 670         break;
 671
 672     case VLC_FOURCC('f','l','3','2'):
 673         waveformat.Format.wBitsPerSample = sizeof(float) * 8;
 674         waveformat.Samples.wValidBitsPerSample =
 675             waveformat.Format.wBitsPerSample;
 676         waveformat.Format.wFormatTag = WAVE_FORMAT_IEEE_FLOAT;
 677         waveformat.SubFormat = _KSDATAFORMAT_SUBTYPE_IEEE_FLOAT;
 678         break;
 679
 680     case VLC_FOURCC('s','1','6','l'):
 681         waveformat.Format.wBitsPerSample = 16;
 682         waveformat.Samples.wValidBitsPerSample =
 683             waveformat.Format.wBitsPerSample;
 684         waveformat.Format.wFormatTag = WAVE_FORMAT_PCM;
 685         waveformat.SubFormat = _KSDATAFORMAT_SUBTYPE_PCM;
 686         break;
 687     }
 688
 689     waveformat.Format.nChannels = i_nb_channels;
 690     waveformat.Format.nSamplesPerSec = i_rate;
 691     waveformat.Format.nBlockAlign =
 692         waveformat.Format.wBitsPerSample / 8 * i_nb_channels;
 693     waveformat.Format.nAvgBytesPerSec =
 694         waveformat.Format.nSamplesPerSec * waveformat.Format.nBlockAlign;
 695
 696     /* Only use the new WAVE_FORMAT_EXTENSIBLE format for multichannel audio */
 697     if( i_nb_channels <= 2 )
 698     {
 699         waveformat.Format.cbSize = 0;
 700     }
 701     else
 702     {
 703         waveformat.Format.wFormatTag = WAVE_FORMAT_EXTENSIBLE;
 704         waveformat.Format.cbSize =
 705             sizeof(WAVEFORMATEXTENSIBLE) - sizeof(WAVEFORMATEX);
 706     }
 707
 708
 709     /* Then fill in the direct sound descriptor */
 710     memset(&dsbdesc, 0, sizeof(DSBUFFERDESC));
 711     dsbdesc.dwSize = sizeof(DSBUFFERDESC);
 712     dsbdesc.dwFlags = DSBCAPS_GETCURRENTPOSITION2/* Better position accuracy */
 713                     | DSBCAPS_CTRLPOSITIONNOTIFY     /* We need notification */
 714                     | DSBCAPS_GLOBALFOCUS       /* Allows background playing */
 715                     | DSBCAPS_LOCHARDWARE;      /* Needed for 5.1 on emu101k */
 716     dsbdesc.dwBufferBytes = FRAMES_NUM * i_bytes_per_frame;   /* buffer size */
 717     dsbdesc.lpwfxFormat = (WAVEFORMATEX *)&waveformat;
 718
 719     if FAILED( IDirectSound_CreateSoundBuffer(
 720                    p_aout->output.p_sys->p_dsobject, &dsbdesc,
 721                    &p_aout->output.p_sys->p_dsbuffer, NULL) )
 722     {
 723         /* Try without DSBCAPS_LOCHARDWARE */
 724         dsbdesc.dwFlags &= ~DSBCAPS_LOCHARDWARE;
 725         if FAILED( IDirectSound_CreateSoundBuffer(
 726                    p_aout->output.p_sys->p_dsobject, &dsbdesc,
 727                    &p_aout->output.p_sys->p_dsbuffer, NULL) )
 728         {
 729             return VLC_EGENERIC;
 730         }
 731         if( !b_probe ) msg_Dbg( p_aout, "couldn't use hardware sound buffer" );
 732     }
 733
 734     /* Stop here if we were just probing */
 735     if( b_probe )
 736     {
 737         IDirectSoundBuffer_Release( p_aout->output.p_sys->p_dsbuffer );
 738         p_aout->output.p_sys->p_dsbuffer = NULL;
 739         return VLC_SUCCESS;
 740     }
 741
 742     /* Backup the size of a frame */
 743     p_aout->output.p_sys->p_notif->i_frame_size = i_bytes_per_frame;
 744
 745     /* Now the secondary buffer is created, we need to setup its position
 746      * notification */
 747     for( i = 0; i < FRAMES_NUM; i++ )
 748     {
 749         p_aout->output.p_sys->p_notif->p_events[i].dwOffset = i *
 750             p_aout->output.p_sys->p_notif->i_frame_size;
 751
 752         p_aout->output.p_sys->p_notif->i_frame_status[i] = FRAME_EMPTY;
 753     }
 754
 755     /* Get the IDirectSoundNotify interface */
 756     if FAILED( IDirectSoundBuffer_QueryInterface(
 757                                 p_aout->output.p_sys->p_dsbuffer,
 758                                 &IID_IDirectSoundNotify,
 759                                 (LPVOID *)&p_aout->output.p_sys->p_dsnotify ) )
 760     {
 761         msg_Err( p_aout, "cannot get IDirectSoundNotify interface" );
 762         goto error;
 763     }
 764
 765     if FAILED( IDirectSoundNotify_SetNotificationPositions(
 766                                     p_aout->output.p_sys->p_dsnotify,
 767                                     FRAMES_NUM,
 768                                     p_aout->output.p_sys->p_notif->p_events ) )
 769     {
 770         msg_Err( p_aout, "cannot set position notification" );
 771         goto error;
 772     }
 773
 774     p_aout->output.p_sys->i_channel_mask = waveformat.dwChannelMask;
 775     CheckReordering( p_aout, i_nb_channels );
 776
 777     return VLC_SUCCESS;
 778
 779  error:
 780     DestroyDSBuffer( p_aout );
 781     return VLC_EGENERIC;
 782 }
 783
 784 /*****************************************************************************
 785  * CreateDSBufferPCM: creates a PCM direct sound buffer.
 786  *****************************************************************************
 787  * We first try to create a WAVE_FORMAT_IEEE_FLOAT buffer if supported by
 788  * the hardware, otherwise we create a WAVE_FORMAT_PCM buffer.
 789  ****************************************************************************/
 790 static int CreateDSBufferPCM( aout_instance_t *p_aout, int *i_format,
 791                               int i_channels, int i_nb_channels, int i_rate,
 792                               vlc_bool_t b_probe )
 793 {
 794     /* Float32 audio samples are not supported for 5.1 output on the emu101k */
 795
 796     if( i_nb_channels > 2 ||
 797         CreateDSBuffer( p_aout, VLC_FOURCC('f','l','3','2'),
 798                         i_channels, i_nb_channels, i_rate,
 799                         FRAME_SIZE * 4 * i_nb_channels, b_probe )
 800         != VLC_SUCCESS )
 801     {
 802         if ( CreateDSBuffer( p_aout, VLC_FOURCC('s','1','6','l'),
 803                              i_channels, i_nb_channels, i_rate,
 804                              FRAME_SIZE * 2 * i_nb_channels, b_probe )
 805              != VLC_SUCCESS )
 806         {
 807             return VLC_EGENERIC;
 808         }
 809         else
 810         {
 811             *i_format = VLC_FOURCC('s','1','6','l');
 812             return VLC_SUCCESS;
 813         }
 814     }
 815     else
 816     {
 817         *i_format = VLC_FOURCC('f','l','3','2');
 818         return VLC_SUCCESS;
 819     }
 820 }
 821
 822 /*****************************************************************************
 823  * DestroyDSBuffer
 824  *****************************************************************************
 825  * This function destroys the secondary buffer.
 826  *****************************************************************************/
 827 static void DestroyDSBuffer( aout_instance_t *p_aout )
 828 {
 829     if( p_aout->output.p_sys->p_dsnotify )
 830     {
 831         IDirectSoundNotify_Release( p_aout->output.p_sys->p_dsnotify );
 832         p_aout->output.p_sys->p_dsnotify = NULL;
 833     }
 834
 835     if( p_aout->output.p_sys->p_dsbuffer )
 836     {
 837         IDirectSoundBuffer_Release( p_aout->output.p_sys->p_dsbuffer );
 838         p_aout->output.p_sys->p_dsbuffer = NULL;
 839     }
 840 }
 841
 842 /*****************************************************************************
 843  * FillBuffer: Fill in one of the direct sound frame buffers.
 844  *****************************************************************************
 845  * Returns VLC_SUCCESS on success.
 846  *****************************************************************************/
 847 static int FillBuffer( aout_instance_t *p_aout, int i_frame,
 848                        aout_buffer_t *p_buffer )
 849 {
 850     notification_thread_t *p_notif = p_aout->output.p_sys->p_notif;
 851     void *p_write_position, *p_wrap_around;
 852     long l_bytes1, l_bytes2;
 853     HRESULT dsresult;
 854
 855     /* Before copying anything, we have to lock the buffer */
 856     dsresult = IDirectSoundBuffer_Lock(
 857                 p_aout->output.p_sys->p_dsbuffer,               /* DS buffer */
 858                 i_frame * p_notif->i_frame_size,             /* Start offset */
 859                 p_notif->i_frame_size,                    /* Number of bytes */
 860                 &p_write_position,                  /* Address of lock start */
 861                 &l_bytes1,       /* Count of bytes locked before wrap around */
 862                 &p_wrap_around,            /* Buffer adress (if wrap around) */
 863                 &l_bytes2,               /* Count of bytes after wrap around */
 864                 0 );                                                /* Flags */
 865     if( dsresult == DSERR_BUFFERLOST )
 866     {
 867         IDirectSoundBuffer_Restore( p_aout->output.p_sys->p_dsbuffer );
 868         dsresult = IDirectSoundBuffer_Lock(
 869                                p_aout->output.p_sys->p_dsbuffer,
 870                                i_frame * p_notif->i_frame_size,
 871                                p_notif->i_frame_size,
 872                                &p_write_position,
 873                                &l_bytes1,
 874                                &p_wrap_around,
 875                                &l_bytes2,
 876                                0 );
 877     }
 878     if( dsresult != DS_OK )
 879     {
 880         msg_Warn( p_notif, "cannot lock buffer" );
 881         if( p_buffer ) aout_BufferFree( p_buffer );
 882         return VLC_EGENERIC;
 883     }
 884
 885     if( p_buffer == NULL )
 886     {
 887         memset( p_write_position, 0, l_bytes1 );
 888     }
 889     else if( p_aout->output.p_sys->b_chan_reorder )
 890     {
 891         /* Do the channel reordering here */
 892
 893         if( p_aout->output.output.i_format ==  VLC_FOURCC('s','1','6','l') )
 894           InterleaveS16( (int16_t *)p_buffer->p_buffer,
 895                          (int16_t *)p_write_position,
 896                          p_aout->output.p_sys->pi_chan_table,
 897                          aout_FormatNbChannels( &p_aout->output.output ) );
 898         else
 899           InterleaveFloat32( (float *)p_buffer->p_buffer,
 900                              (float *)p_write_position,
 901                              p_aout->output.p_sys->pi_chan_table,
 902                              aout_FormatNbChannels( &p_aout->output.output ) );
 903
 904         aout_BufferFree( p_buffer );
 905     }
 906     else
 907     {
 908         p_aout->p_vlc->pf_memcpy( p_write_position, p_buffer->p_buffer,
 909                                   l_bytes1 );
 910         aout_BufferFree( p_buffer );
 911     }
 912
 913     /* Now the data has been copied, unlock the buffer */
 914     IDirectSoundBuffer_Unlock( p_aout->output.p_sys->p_dsbuffer,
 915                                p_write_position, l_bytes1,
 916                                p_wrap_around, l_bytes2 );
 917
 918     return VLC_SUCCESS;
 919 }
 920
 921 /*****************************************************************************
 922  * DirectSoundThread: this thread will capture play notification events.
 923  *****************************************************************************
 924  * We use this thread to emulate a callback mechanism. The thread probes for
 925  * event notification and fills up the DS secondary buffer when needed.
 926  *****************************************************************************/
 927 static void DirectSoundThread( notification_thread_t *p_notif )
 928 {
 929     HANDLE  notification_events[FRAMES_NUM];
 930     HRESULT dsresult;
 931     aout_instance_t *p_aout = p_notif->p_aout;
 932     int i, i_which_frame, i_last_frame, i_next_frame;
 933     mtime_t mtime;
 934     vlc_bool_t b_sleek;
 935
 936     for( i = 0; i < FRAMES_NUM; i++ )
 937         notification_events[i] = p_notif->p_events[i].hEventNotify;
 938
 939     /* We don't want any resampling when using S/PDIF output */
 940     b_sleek = p_aout->output.output.i_format == VLC_FOURCC('s','p','d','i');
 941
 942     /* Tell the main thread that we are ready */
 943     vlc_thread_ready( p_notif );
 944
 945     msg_Dbg( p_notif, "DirectSoundThread ready" );
 946
 947     /* Wait here until Play() is called */
 948     WaitForSingleObject( notification_events[0], INFINITE );
 949
 950     if( !p_notif->b_die )
 951     {
 952         mwait( p_notif->start_date - AOUT_PTS_TOLERANCE / 2 );
 953
 954         /* start playing the buffer */
 955         dsresult = IDirectSoundBuffer_Play( p_aout->output.p_sys->p_dsbuffer,
 956                                         0,                         /* Unused */
 957                                         0,                         /* Unused */
 958                                         DSBPLAY_LOOPING );          /* Flags */
 959         if( dsresult == DSERR_BUFFERLOST )
 960         {
 961             IDirectSoundBuffer_Restore( p_aout->output.p_sys->p_dsbuffer );
 962             dsresult = IDirectSoundBuffer_Play(
 963                                             p_aout->output.p_sys->p_dsbuffer,
 964                                             0,                     /* Unused */
 965                                             0,                     /* Unused */
 966                                             DSBPLAY_LOOPING );      /* Flags */
 967         }
 968         if( dsresult != DS_OK )
 969         {
 970             msg_Err( p_aout, "cannot start playing buffer" );
 971         }
 972     }
 973
 974     while( !p_notif->b_die )
 975     {
 976         aout_buffer_t *p_buffer;
 977         long l_latency;
 978
 979         /* wait for the position notification */
 980         i_which_frame = WaitForMultipleObjects( FRAMES_NUM,
 981                                                 notification_events, 0,
 982                                                 INFINITE ) - WAIT_OBJECT_0;
 983
 984         if( p_notif->b_die )
 985             break;
 986
 987         mtime = mdate();
 988
 989         /* We take into account the current latency */
 990         if SUCCEEDED( IDirectSoundBuffer_GetCurrentPosition(
 991                         p_aout->output.p_sys->p_dsbuffer,
 992                         &l_latency, NULL ) )
 993         {
 994             if( l_latency > (i_which_frame * FRAME_SIZE)
 995                   && l_latency < ((i_which_frame+1) * FRAME_SIZE) )
 996             {
 997                 l_latency = - ( l_latency /
 998                                 p_aout->output.output.i_bytes_per_frame %
 999                                 FRAME_SIZE );
1000             }
1001             else
1002             {
1003                 l_latency = FRAME_SIZE - ( l_latency /
1004                                       p_aout->output.output.i_bytes_per_frame %
1005                                       FRAME_SIZE );
1006             }
1007         }
1008         else
1009         {
1010             l_latency = 0;
1011         }
1012
1013         /* Mark last frame as empty */
1014         i_last_frame = (i_which_frame + FRAMES_NUM -1) % FRAMES_NUM;
1015         i_next_frame = (i_which_frame + 1) % FRAMES_NUM;
1016         p_notif->i_frame_status[i_last_frame] = FRAME_EMPTY;
1017
1018         /* Try to fill in as many frame buffers as possible */
1019         for( i = i_next_frame; (i % FRAMES_NUM) != i_which_frame; i++ )
1020         {
1021
1022             /* Check if frame buf is already filled */
1023             if( p_notif->i_frame_status[i % FRAMES_NUM] == FRAME_QUEUED )
1024                 continue;
1025
1026             p_buffer = aout_OutputNextBuffer( p_aout,
1027                 mtime + 1000000 / p_aout->output.output.i_rate *
1028                 ((i - i_next_frame + 1) * FRAME_SIZE + l_latency), b_sleek );
1029
1030             /* If there is no audio data available and we have some buffered
1031              * already, then just wait for the next time */
1032             if( !p_buffer && (i != i_next_frame) )
1033             {
1034                 //msg_Err( p_aout, "only %i frame buffers filled!",
1035                 //         i - i_next_frame );
1036                 break;
1037             }
1038
1039             if( FillBuffer( p_aout, (i%FRAMES_NUM), p_buffer )
1040                 != VLC_SUCCESS )
1041                 break;
1042
1043             /* Mark the frame buffer as QUEUED */
1044             p_notif->i_frame_status[i%FRAMES_NUM] = FRAME_QUEUED;
1045         }
1046
1047     }
1048
1049     /* make sure the buffer isn't playing */
1050     IDirectSoundBuffer_Stop( p_aout->output.p_sys->p_dsbuffer );
1051
1052     /* free the events */
1053     for( i = 0; i < FRAMES_NUM; i++ )
1054         CloseHandle( notification_events[i] );
1055
1056     msg_Dbg( p_notif, "DirectSoundThread exiting" );
1057 }
1058
1059 /*****************************************************************************
1060  * CheckReordering: Check if we need to do some channel re-ordering (the ac3
1061  *                  channel order is different from the one chosen by
1062  *                  Microsoft).
1063  *****************************************************************************/
1064 static void CheckReordering( aout_instance_t *p_aout, int i_nb_channels )
1065 {
1066     int i, j, k, l;
1067
1068 #define i_channel_mask p_aout->output.p_sys->i_channel_mask
1069 #define pi_chan_table p_aout->output.p_sys->pi_chan_table
1070
1071     p_aout->output.p_sys->b_chan_reorder = VLC_FALSE;
1072
1073     pi_chan_table = malloc( i_nb_channels * sizeof(int) );
1074     if( !pi_chan_table )
1075     {
1076         return;
1077     }
1078
1079     for( i = 0, j = 0;
1080          i < (int)(sizeof(pi_channels_out)/sizeof(uint32_t)); i++ )
1081     {
1082         if( i_channel_mask & pi_channels_out[i] )
1083         {
1084             for( k = 0, l = 0;
1085                  pi_channels_out[i] != pi_channels_ordered[k]; k++ )
1086             {
1087                 if( i_channel_mask & pi_channels_ordered[k] )
1088                 {
1089                     l++;
1090                 }
1091             }
1092
1093             pi_chan_table[j] = l;
1094
1095             j++;
1096         }
1097     }
1098
1099     for( i = 0; i < i_nb_channels; i++ )
1100     {
1101         if( pi_chan_table[i] != i )
1102         {
1103             p_aout->output.p_sys->b_chan_reorder = VLC_TRUE;
1104         }
1105     }
1106
1107     if( p_aout->output.p_sys->b_chan_reorder )
1108     {
1109         msg_Dbg( p_aout, "channel reordering needed" );
1110     }
1111
1112 #undef pi_chan_table
1113 #undef waveformat
1114 }
1115
1116 /*****************************************************************************
1117  * InterleaveFloat32/S16: change the channel order to the Microsoft one.
1118  *****************************************************************************/
1119 static void InterleaveFloat32( float *p_buf, float *p_buf_out,
1120                                int *pi_chan_table, int i_nb_channels )
1121 {
1122     int i, j;
1123
1124     for( i = 0; i < FRAME_SIZE; i++ )
1125     {
1126         for( j = 0; j < i_nb_channels; j++ )
1127         {
1128             p_buf_out[i*i_nb_channels + pi_chan_table[j]] =
1129                 p_buf[i*i_nb_channels + j];
1130         }
1131     }
1132 }
1133
1134 static void InterleaveS16( int16_t *p_buf, int16_t *p_buf_out,
1135                            int *pi_chan_table, int i_nb_channels )
1136 {
1137     int i, j;
1138
1139     for( i = 0; i < FRAME_SIZE; i++ )
1140     {
1141         for( j = 0; j < i_nb_channels; j++ )
1142         {
1143             p_buf_out[ i*i_nb_channels + pi_chan_table[j]] =
1144                 p_buf[i*i_nb_channels + j];
1145         }
1146     }
1147 }