directx.c 41.5 KB
Newer Older
1
/*****************************************************************************
2
 * directx.c: Windows DirectX audio output method
3 4
 *****************************************************************************
 * Copyright (C) 2001 VideoLAN
gbazin's avatar
 
gbazin committed
5
 * $Id: directx.c,v 1.17 2003/04/07 16:02:08 gbazin Exp $
6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34
 *
 * Authors: Gildas Bazin <gbazin@netcourrier.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
 *****************************************************************************/

/*****************************************************************************
 * Preamble
 *****************************************************************************/
#include <errno.h>                                                 /* ENOMEM */
#include <fcntl.h>                                       /* open(), O_WRONLY */
#include <string.h>                                            /* strerror() */

#include <stdlib.h>                            /* calloc(), malloc(), free() */

#include <vlc/vlc.h>
#include <vlc/aout.h>
gbazin's avatar
 
gbazin committed
35
#include "aout_internal.h"
36

gbazin's avatar
 
gbazin committed
37
#include <windows.h>
38 39 40
#include <mmsystem.h>
#include <dsound.h>

gbazin's avatar
 
gbazin committed
41
#define FRAME_SIZE 2048              /* The size is in samples, not in bytes */
gbazin's avatar
 
gbazin committed
42 43 44 45 46
#define FRAMES_NUM 4

/* frame buffer status */
#define FRAME_QUEUED 0
#define FRAME_EMPTY 1
gbazin's avatar
 
gbazin committed
47

48 49 50 51 52 53 54 55
/*****************************************************************************
 * DirectSound GUIDs.
 * Defining them here allows us to get rid of the dxguid library during
 * the linking stage.
 *****************************************************************************/
#include <initguid.h>
DEFINE_GUID(IID_IDirectSoundNotify, 0xb0210783, 0x89cd, 0x11d0, 0xaf, 0x8, 0x0, 0xa0, 0xc9, 0x25, 0xcd, 0x16);

gbazin's avatar
 
gbazin committed
56 57 58 59 60 61 62
/*****************************************************************************
 * Useful macros
 *****************************************************************************/
#ifndef WAVE_FORMAT_IEEE_FLOAT
#   define WAVE_FORMAT_IEEE_FLOAT 0x0003
#endif

gbazin's avatar
 
gbazin committed
63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92
#ifndef WAVE_FORMAT_DOLBY_AC3_SPDIF
#   define WAVE_FORMAT_DOLBY_AC3_SPDIF 0x0092
#endif

#ifndef WAVE_FORMAT_EXTENSIBLE
#define  WAVE_FORMAT_EXTENSIBLE   0xFFFE
#endif

#ifndef SPEAKER_FRONT_LEFT
#   define SPEAKER_FRONT_LEFT             0x1
#   define SPEAKER_FRONT_RIGHT            0x2
#   define SPEAKER_FRONT_CENTER           0x4
#   define SPEAKER_LOW_FREQUENCY          0x8
#   define SPEAKER_BACK_LEFT              0x10
#   define SPEAKER_BACK_RIGHT             0x20
#   define SPEAKER_FRONT_LEFT_OF_CENTER   0x40
#   define SPEAKER_FRONT_RIGHT_OF_CENTER  0x80
#   define SPEAKER_BACK_CENTER            0x100
#   define SPEAKER_SIDE_LEFT              0x200
#   define SPEAKER_SIDE_RIGHT             0x400
#   define SPEAKER_TOP_CENTER             0x800
#   define SPEAKER_TOP_FRONT_LEFT         0x1000
#   define SPEAKER_TOP_FRONT_CENTER       0x2000
#   define SPEAKER_TOP_FRONT_RIGHT        0x4000
#   define SPEAKER_TOP_BACK_LEFT          0x8000
#   define SPEAKER_TOP_BACK_CENTER        0x10000
#   define SPEAKER_TOP_BACK_RIGHT         0x20000
#   define SPEAKER_RESERVED               0x80000000
#endif

gbazin's avatar
 
gbazin committed
93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111
#ifndef DSSPEAKER_HEADPHONE
#   define DSSPEAKER_HEADPHONE         0x00000001
#endif
#ifndef DSSPEAKER_MONO
#   define DSSPEAKER_MONO              0x00000002
#endif
#ifndef DSSPEAKER_QUAD
#   define DSSPEAKER_QUAD              0x00000003
#endif
#ifndef DSSPEAKER_STEREO
#   define DSSPEAKER_STEREO            0x00000004
#endif
#ifndef DSSPEAKER_SURROUND
#   define DSSPEAKER_SURROUND          0x00000005
#endif
#ifndef DSSPEAKER_5POINT1
#   define DSSPEAKER_5POINT1           0x00000006
#endif

gbazin's avatar
 
gbazin committed
112 113 114 115 116 117 118 119 120 121 122 123 124 125
#ifndef _WAVEFORMATEXTENSIBLE_
typedef struct {
    WAVEFORMATEX    Format;
    union {
        WORD wValidBitsPerSample;       /* bits of precision  */
        WORD wSamplesPerBlock;          /* valid if wBitsPerSample==0 */
        WORD wReserved;                 /* If neither applies, set to zero. */
    } Samples;
    DWORD           dwChannelMask;      /* which channels are */
                                        /* present in stream  */
    GUID            SubFormat;
} WAVEFORMATEXTENSIBLE, *PWAVEFORMATEXTENSIBLE;
#endif

gbazin's avatar
 
gbazin committed
126 127 128
DEFINE_GUID( _KSDATAFORMAT_SUBTYPE_IEEE_FLOAT, WAVE_FORMAT_IEEE_FLOAT, 0x0000, 0x0010, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 );
DEFINE_GUID( _KSDATAFORMAT_SUBTYPE_PCM, WAVE_FORMAT_PCM, 0x0000, 0x0010, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 );
DEFINE_GUID( _KSDATAFORMAT_SUBTYPE_DOLBY_AC3_SPDIF, WAVE_FORMAT_DOLBY_AC3_SPDIF, 0x0000, 0x0010, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 );
gbazin's avatar
 
gbazin committed
129

130 131 132 133 134 135 136
/*****************************************************************************
 * notification_thread_t: DirectX event thread
 *****************************************************************************/
typedef struct notification_thread_t
{
    VLC_COMMON_MEMBERS

gbazin's avatar
 
gbazin committed
137
    aout_instance_t * p_aout;
gbazin's avatar
 
gbazin committed
138 139 140 141 142
    int i_frame_status[FRAMES_NUM];           /* status of each frame buffer */
    DSBPOSITIONNOTIFY p_events[FRAMES_NUM];      /* play notification events */
    int i_frame_size;                         /* Size in bytes of one frame */

    mtime_t start_date;
143 144 145 146 147 148 149 150 151 152 153

} notification_thread_t;

/*****************************************************************************
 * aout_sys_t: directx audio output method descriptor
 *****************************************************************************
 * This structure is part of the audio output thread descriptor.
 * It describes the direct sound specific properties of an audio device.
 *****************************************************************************/
struct aout_sys_t
{
gbazin's avatar
 
gbazin committed
154
    HINSTANCE           hdsound_dll;      /* handle of the opened dsound dll */
155 156 157 158 159 160
    LPDIRECTSOUND       p_dsobject;              /* main Direct Sound object */
    LPDIRECTSOUNDBUFFER p_dsbuffer;   /* the sound buffer we use (direct sound
                                       * takes care of mixing all the
                                       * secondary buffers into the primary) */

    LPDIRECTSOUNDNOTIFY p_dsnotify;         /* the position notify interface */
gbazin's avatar
 
gbazin committed
161
    notification_thread_t *p_notif;                  /* DirectSoundThread id */
162

gbazin's avatar
 
gbazin committed
163
    int b_playing;                                         /* playing status */
164

gbazin's avatar
 
gbazin committed
165
    int i_frame_size;                         /* Size in bytes of one frame */
gbazin's avatar
 
gbazin committed
166

gbazin's avatar
 
gbazin committed
167 168 169
    vlc_bool_t b_chan_reorder;              /* do we need channel reordering */
    int *pi_chan_table;
    uint32_t i_channel_mask;
170 171
};

gbazin's avatar
 
gbazin committed
172 173 174 175 176 177 178 179 180 181 182 183 184
static const uint32_t pi_channels_in[] =
    { AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT,
      AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT,
      AOUT_CHAN_CENTER, AOUT_CHAN_LFE };
static const uint32_t pi_channels_out[] =
    { SPEAKER_FRONT_LEFT, SPEAKER_FRONT_RIGHT,
      SPEAKER_BACK_LEFT, SPEAKER_BACK_RIGHT,
      SPEAKER_FRONT_CENTER, SPEAKER_LOW_FREQUENCY };
static const uint32_t pi_channels_ordered[] =
    { SPEAKER_FRONT_LEFT, SPEAKER_FRONT_RIGHT, SPEAKER_FRONT_CENTER,
      SPEAKER_LOW_FREQUENCY,
      SPEAKER_BACK_LEFT, SPEAKER_BACK_RIGHT };

185 186 187
/*****************************************************************************
 * Local prototypes.
 *****************************************************************************/
gbazin's avatar
 
gbazin committed
188 189 190
static int  OpenAudio  ( vlc_object_t * );
static void CloseAudio ( vlc_object_t * );
static void Play       ( aout_instance_t * );
191 192

/* local functions */
gbazin's avatar
 
gbazin committed
193 194 195 196 197 198 199 200 201
static void Probe             ( aout_instance_t * );
static int  InitDirectSound   ( aout_instance_t * );
static int  CreateDSBuffer    ( aout_instance_t *, int, int, int, int, int, vlc_bool_t );
static int  CreateDSBufferPCM ( aout_instance_t *, int*, int, int, int, vlc_bool_t );
static void DestroyDSBuffer   ( aout_instance_t * );
static void DirectSoundThread ( notification_thread_t * );
static int  FillBuffer        ( aout_instance_t *, int, aout_buffer_t * );

static void CheckReordering   ( aout_instance_t *, int );
gbazin's avatar
 
gbazin committed
202 203
static void InterleaveFloat32 ( float *, float *, int *, int );
static void InterleaveS16     ( int16_t *, int16_t *, int *, int );
204

gbazin's avatar
 
gbazin committed
205 206 207 208
/*****************************************************************************
 * Module descriptor
 *****************************************************************************/
vlc_module_begin();
gbazin's avatar
 
gbazin committed
209
    set_description( _("DirectX audio output") );
gbazin's avatar
 
gbazin committed
210
    set_capability( "audio output", 100 );
gbazin's avatar
 
gbazin committed
211 212 213 214
    add_shortcut( "directx" );
    set_callbacks( OpenAudio, CloseAudio );
vlc_module_end();

215 216 217 218 219
/*****************************************************************************
 * OpenAudio: open the audio device
 *****************************************************************************
 * This function opens and setups Direct Sound.
 *****************************************************************************/
gbazin's avatar
 
gbazin committed
220
static int OpenAudio( vlc_object_t *p_this )
221
{
gbazin's avatar
 
gbazin committed
222
    aout_instance_t * p_aout = (aout_instance_t *)p_this;
gbazin's avatar
 
gbazin committed
223
    vlc_value_t val;
gbazin's avatar
 
gbazin committed
224
    int i;
225

gbazin's avatar
 
gbazin committed
226
    msg_Dbg( p_aout, "OpenAudio" );
227 228

   /* Allocate structure */
gbazin's avatar
 
gbazin committed
229 230
    p_aout->output.p_sys = malloc( sizeof( aout_sys_t ) );
    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 */
gbazin's avatar
 
gbazin committed
237 238 239 240
    p_aout->output.p_sys->p_dsobject = NULL;
    p_aout->output.p_sys->p_dsbuffer = NULL;
    p_aout->output.p_sys->p_dsnotify = NULL;
    p_aout->output.p_sys->p_notif = NULL;
gbazin's avatar
 
gbazin committed
241
    p_aout->output.p_sys->b_playing = 0;
gbazin's avatar
 
gbazin committed
242
    p_aout->output.p_sys->pi_chan_table = NULL;
gbazin's avatar
 
gbazin committed
243 244

    p_aout->output.pf_play = Play;
245
    aout_VolumeSoftInit( p_aout );
246 247

    /* Initialise DirectSound */
gbazin's avatar
 
gbazin committed
248
    if( InitDirectSound( p_aout ) )
249
    {
gbazin's avatar
 
gbazin committed
250 251
        msg_Err( p_aout, "cannot initialize DirectSound" );
        goto error;
252 253
    }

gbazin's avatar
 
gbazin committed
254
    /* Now we need to setup our DirectSound play notification structure */
gbazin's avatar
 
gbazin committed
255 256 257
    p_aout->output.p_sys->p_notif =
        vlc_object_create( p_aout, sizeof(notification_thread_t) );
    p_aout->output.p_sys->p_notif->p_aout = p_aout;
258

gbazin's avatar
 
gbazin committed
259 260 261 262 263 264 265 266 267 268 269 270 271
    if( var_Type( p_aout, "audio-device" ) == 0 )
    {
        Probe( p_aout );
    }

    if( var_Get( p_aout, "audio-device", &val ) < 0 )
    {
        /* Probe() has failed. */
        free( p_aout->output.p_sys );
        return VLC_EGENERIC;
    }

    /* Then create the notification events */
gbazin's avatar
 
gbazin committed
272 273 274
    for( i = 0; i < FRAMES_NUM; i++ )
        p_aout->output.p_sys->p_notif->p_events[i].hEventNotify =
            CreateEvent( NULL, FALSE, FALSE, NULL );
275

gbazin's avatar
 
gbazin committed
276 277
    /* Open the device */
    if( !strcmp( val.psz_string, N_("A/52 over S/PDIF") ) )
278
    {
gbazin's avatar
 
gbazin committed
279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327
        free( val.psz_string );
        p_aout->output.output.i_format = VLC_FOURCC('s','p','d','i');

        /* Calculate the frame size in bytes */
        p_aout->output.i_nb_samples = A52_FRAME_NB;
        p_aout->output.output.i_bytes_per_frame = AOUT_SPDIF_SIZE;
        p_aout->output.output.i_frame_length = A52_FRAME_NB;
        p_aout->output.p_sys->i_frame_size =
            p_aout->output.output.i_bytes_per_frame;

        if( CreateDSBuffer( p_aout, VLC_FOURCC('s','p','d','i'),
                            p_aout->output.output.i_physical_channels,
                            aout_FormatNbChannels( &p_aout->output.output ),
                            p_aout->output.output.i_rate,
                            p_aout->output.p_sys->i_frame_size, VLC_FALSE )
            != VLC_SUCCESS )
        {
            msg_Err( p_aout, "cannot open waveout audio device" );
            free( p_aout->output.p_sys );
            return VLC_EGENERIC;
        }

        aout_VolumeNoneInit( p_aout );
    }
    else
    {
        if( !strcmp( val.psz_string, N_("5.1") ) )
        {
            p_aout->output.output.i_physical_channels
                = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
                   | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT
                   | AOUT_CHAN_LFE;
        }
        else if( !strcmp( val.psz_string, N_("2 Front 2 Rear") ) )
        {
            p_aout->output.output.i_physical_channels
                = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT
                   | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
        }
        else if( !strcmp( val.psz_string, "Mono" ) )
        {
            p_aout->output.output.i_physical_channels = AOUT_CHAN_CENTER;
        }
        else
        {
            p_aout->output.output.i_physical_channels
                = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
        }
        free( val.psz_string );
328

gbazin's avatar
 
gbazin committed
329 330 331 332 333
        if( CreateDSBufferPCM( p_aout, &p_aout->output.output.i_format,
                               p_aout->output.output.i_physical_channels,
                               aout_FormatNbChannels( &p_aout->output.output ),
                               p_aout->output.output.i_rate, VLC_FALSE )
            != VLC_SUCCESS )
gbazin's avatar
 
gbazin committed
334
        {
gbazin's avatar
 
gbazin committed
335 336 337
            msg_Err( p_aout, "cannot open waveout audio device" );
            free( p_aout->output.p_sys );
            return VLC_EGENERIC;
gbazin's avatar
 
gbazin committed
338
        }
gbazin's avatar
 
gbazin committed
339 340 341 342 343 344 345 346

        /* Calculate the frame size in bytes */
        p_aout->output.i_nb_samples = FRAME_SIZE;
        aout_FormatPrepare( &p_aout->output.output );
        p_aout->output.p_sys->i_frame_size =
            FRAME_SIZE * p_aout->output.output.i_bytes_per_frame;

        aout_VolumeSoftInit( p_aout );
gbazin's avatar
 
gbazin committed
347
    }
348

Christophe Massiot's avatar
Christophe Massiot committed
349 350 351 352
    /* then launch the notification thread */
    msg_Dbg( p_aout, "creating DirectSoundThread" );
    if( vlc_thread_create( p_aout->output.p_sys->p_notif,
                           "DirectSound Notification Thread",
gbazin's avatar
 
gbazin committed
353
                           DirectSoundThread,
gbazin's avatar
 
gbazin committed
354
                           VLC_THREAD_PRIORITY_HIGHEST, VLC_FALSE ) )
Christophe Massiot's avatar
Christophe Massiot committed
355 356 357 358 359 360 361
    {
        msg_Err( p_aout, "cannot create DirectSoundThread" );
        goto error;
    }

    vlc_object_attach( p_aout->output.p_sys->p_notif, p_aout );

gbazin's avatar
 
gbazin committed
362
    return VLC_SUCCESS;
Christophe Massiot's avatar
Christophe Massiot committed
363 364

 error:
gbazin's avatar
 
gbazin committed
365
    CloseAudio( VLC_OBJECT(p_aout) );
366
    return VLC_EGENERIC;
gbazin's avatar
 
gbazin committed
367 368
}

gbazin's avatar
 
gbazin committed
369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460
/*****************************************************************************
 * Probe: probe the audio device for available formats and channels
 *****************************************************************************/
static void Probe( aout_instance_t * p_aout )
{
    vlc_value_t val;
    int i_format;
    unsigned int i_physical_channels;
    DWORD ui_speaker_config;

    var_Create( p_aout, "audio-device", VLC_VAR_STRING | VLC_VAR_HASCHOICE );

    /* Test for 5.1 support */
    i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
                          AOUT_CHAN_CENTER | AOUT_CHAN_REARLEFT |
                          AOUT_CHAN_REARRIGHT | AOUT_CHAN_LFE;
    if( p_aout->output.output.i_physical_channels == i_physical_channels )
    {
        if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 6,
                               p_aout->output.output.i_rate, VLC_TRUE )
            == VLC_SUCCESS )
        {
            val.psz_string = N_("5.1");
            var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val );
            msg_Dbg( p_aout, "device supports 5.1 channels" );
        }
    }

    /* Test for 2 Front 2 Rear support */
    i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
                          AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
    if( ( p_aout->output.output.i_physical_channels & i_physical_channels )
        == i_physical_channels )
    {
        if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 4,
                               p_aout->output.output.i_rate, VLC_TRUE )
            == VLC_SUCCESS )
        {
            val.psz_string = N_("2 Front 2 Rear");
            var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val );
            msg_Dbg( p_aout, "device supports 4 channels" );
        }
    }

    /* Test for stereo support */
    i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
    if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 2,
                           p_aout->output.output.i_rate, VLC_TRUE )
        == VLC_SUCCESS )
    {
        val.psz_string = N_("Stereo");
        var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val );
        msg_Dbg( p_aout, "device supports 2 channels" );
    }

    /* Test for mono support */
    i_physical_channels = AOUT_CHAN_CENTER;
    if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 1,
                           p_aout->output.output.i_rate, VLC_TRUE )
        == VLC_SUCCESS )
    {
        val.psz_string = N_("Mono");
        var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val );        
        msg_Dbg( p_aout, "device supports 1 channel" );
    }

    /* Check the speaker configuration to determine which channel config should
     * be the default */
    if FAILED( IDirectSound_GetSpeakerConfig( p_aout->output.p_sys->p_dsobject,
                                              &ui_speaker_config ) )
    {
        ui_speaker_config = DSSPEAKER_STEREO;
    }
    switch( DSSPEAKER_CONFIG(ui_speaker_config) )
    {
    case DSSPEAKER_5POINT1:
        val.psz_string = N_("5.1");
        break;
    case DSSPEAKER_QUAD:
        val.psz_string = N_("2 Front 2 Rear");
        break;
    case DSSPEAKER_MONO:
        val.psz_string = N_("Mono");
        break;
    case DSSPEAKER_SURROUND:
    case DSSPEAKER_STEREO:
    default:
        val.psz_string = N_("Stereo");
        break;
    }
    var_Set( p_aout, "audio-device", val );

gbazin's avatar
 
gbazin committed
461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478
    /* Test for SPDIF support */
    if ( AOUT_FMT_NON_LINEAR( &p_aout->output.output ) )
    {
        if( CreateDSBuffer( p_aout, VLC_FOURCC('s','p','d','i'),
                            p_aout->output.output.i_physical_channels,
                            aout_FormatNbChannels( &p_aout->output.output ),
                            p_aout->output.output.i_rate,
                            AOUT_SPDIF_SIZE, VLC_TRUE )
            == VLC_SUCCESS )
        {
            msg_Dbg( p_aout, "device supports A/52 over S/PDIF" );
            val.psz_string = N_("A/52 over S/PDIF");
            var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val );
            if( config_GetInt( p_aout, "spdif" ) )
                var_Set( p_aout, "audio-device", val );
        }
    }

gbazin's avatar
 
gbazin committed
479 480 481 482 483 484
    var_AddCallback( p_aout, "audio-device", aout_ChannelsRestart, NULL );

    val.b_bool = VLC_TRUE;
    var_Set( p_aout, "intf-change", val );
}

gbazin's avatar
 
gbazin committed
485
/*****************************************************************************
gbazin's avatar
 
gbazin committed
486 487 488
 * Play: we'll start playing the directsound buffer here because at least here
 *       we know the first buffer has been put in the aout fifo and we also
 *       know its date.
gbazin's avatar
 
gbazin committed
489
 *****************************************************************************/
490
static void Play( aout_instance_t *p_aout )
gbazin's avatar
 
gbazin committed
491
{
gbazin's avatar
 
gbazin committed
492 493 494 495 496 497 498 499 500 501 502 503
    if( !p_aout->output.p_sys->b_playing )
    {
        aout_buffer_t *p_buffer;

        p_aout->output.p_sys->b_playing = 1;

        /* get the playing date of the first aout buffer */
        p_aout->output.p_sys->p_notif->start_date =
            aout_FifoFirstDate( p_aout, &p_aout->output.fifo );

        /* fill in the first samples */
        p_buffer = aout_FifoPop( p_aout, &p_aout->output.fifo );
gbazin's avatar
 
gbazin committed
504
        FillBuffer( p_aout, 0, p_buffer );
gbazin's avatar
 
gbazin committed
505 506 507 508

        /* wake up the audio output thread */
        SetEvent( p_aout->output.p_sys->p_notif->p_events[0].hEventNotify );
    }
509 510 511 512 513
}

/*****************************************************************************
 * CloseAudio: close the audio device
 *****************************************************************************/
gbazin's avatar
 
gbazin committed
514
static void CloseAudio( vlc_object_t *p_this )
515
{
gbazin's avatar
 
gbazin committed
516
    aout_instance_t * p_aout = (aout_instance_t *)p_this;
517

gbazin's avatar
 
gbazin committed
518
    msg_Dbg( p_aout, "CloseAudio" );
519 520

    /* kill the position notification thread, if any */
gbazin's avatar
 
gbazin committed
521
    if( p_aout->output.p_sys->p_notif )
522
    {
523
        vlc_object_detach( p_aout->output.p_sys->p_notif );
gbazin's avatar
 
gbazin committed
524 525 526
        if( p_aout->output.p_sys->p_notif->b_thread )
        {
            p_aout->output.p_sys->p_notif->b_die = 1;
gbazin's avatar
 
gbazin committed
527 528 529 530 531 532

            if( !p_aout->output.p_sys->b_playing )
                /* wake up the audio thread */
                SetEvent(
                    p_aout->output.p_sys->p_notif->p_events[0].hEventNotify );

gbazin's avatar
 
gbazin committed
533 534 535
            vlc_thread_join( p_aout->output.p_sys->p_notif );
        }
        vlc_object_destroy( p_aout->output.p_sys->p_notif );
536 537 538
    }

    /* release the secondary buffer */
gbazin's avatar
 
gbazin committed
539
    DestroyDSBuffer( p_aout );
540 541

    /* finally release the DirectSound object */
gbazin's avatar
 
gbazin committed
542 543
    if( p_aout->output.p_sys->p_dsobject )
        IDirectSound_Release( p_aout->output.p_sys->p_dsobject );
544 545
    
    /* free DSOUND.DLL */
gbazin's avatar
 
gbazin committed
546 547
    if( p_aout->output.p_sys->hdsound_dll )
       FreeLibrary( p_aout->output.p_sys->hdsound_dll );
548

gbazin's avatar
 
gbazin committed
549 550 551
    if( p_aout->output.p_sys->pi_chan_table )
        free( p_aout->output.p_sys->pi_chan_table );

552
    free( p_aout->output.p_sys );
553 554 555
}

/*****************************************************************************
gbazin's avatar
 
gbazin committed
556
 * InitDirectSound: handle all the gory details of DirectSound initialisation
557
 *****************************************************************************/
gbazin's avatar
 
gbazin committed
558
static int InitDirectSound( aout_instance_t *p_aout )
559 560 561
{
    HRESULT (WINAPI *OurDirectSoundCreate)(LPGUID, LPDIRECTSOUND *, LPUNKNOWN);

gbazin's avatar
 
gbazin committed
562 563
    p_aout->output.p_sys->hdsound_dll = LoadLibrary("DSOUND.DLL");
    if( p_aout->output.p_sys->hdsound_dll == NULL )
564
    {
gbazin's avatar
 
gbazin committed
565 566
        msg_Warn( p_aout, "cannot open DSOUND.DLL" );
        goto error;
567 568
    }

gbazin's avatar
 
gbazin committed
569 570 571
    OurDirectSoundCreate = (void *)GetProcAddress(
                                           p_aout->output.p_sys->hdsound_dll,
                                           "DirectSoundCreate" );
572 573
    if( OurDirectSoundCreate == NULL )
    {
gbazin's avatar
 
gbazin committed
574 575
        msg_Warn( p_aout, "GetProcAddress FAILED" );
        goto error;
576 577 578
    }

    /* Create the direct sound object */
gbazin's avatar
 
gbazin committed
579 580
    if FAILED( OurDirectSoundCreate( NULL, &p_aout->output.p_sys->p_dsobject,
                                     NULL ) )
581 582
    {
        msg_Warn( p_aout, "cannot create a direct sound device" );
gbazin's avatar
 
gbazin committed
583
        goto error;
584 585 586 587 588 589 590 591 592 593 594 595
    }

    /* Set DirectSound Cooperative level, ie what control we want over Windows
     * sound device. In our case, DSSCL_EXCLUSIVE means that we can modify the
     * settings of the primary buffer, but also that only the sound of our
     * application will be hearable when it will have the focus.
     * !!! (this is not really working as intended yet because to set the
     * cooperative level you need the window handle of your application, and
     * I don't know of any easy way to get it. Especially since we might play
     * sound without any video, and so what window handle should we use ???
     * The hack for now is to use the Desktop window handle - it seems to be
     * working */
gbazin's avatar
 
gbazin committed
596 597 598
    if( IDirectSound_SetCooperativeLevel( p_aout->output.p_sys->p_dsobject,
                                          GetDesktopWindow(),
                                          DSSCL_EXCLUSIVE) )
599 600 601 602
    {
        msg_Warn( p_aout, "cannot set direct sound cooperative level" );
    }

gbazin's avatar
 
gbazin committed
603
    return VLC_SUCCESS;
gbazin's avatar
 
gbazin committed
604 605 606 607 608 609 610 611

 error:
    p_aout->output.p_sys->p_dsobject = NULL;
    if( p_aout->output.p_sys->hdsound_dll )
    {
        FreeLibrary( p_aout->output.p_sys->hdsound_dll );
        p_aout->output.p_sys->hdsound_dll = NULL;
    }
gbazin's avatar
 
gbazin committed
612
    return VLC_EGENERIC;
gbazin's avatar
 
gbazin committed
613

614 615 616
}

/*****************************************************************************
gbazin's avatar
 
gbazin committed
617
 * CreateDSBuffer: Creates a direct sound buffer of the required format.
618 619 620 621 622 623 624 625
 *****************************************************************************
 * This function creates the buffer we'll use to play audio.
 * In DirectSound there are two kinds of buffers:
 * - the primary buffer: which is the actual buffer that the soundcard plays
 * - the secondary buffer(s): these buffers are the one actually used by
 *    applications and DirectSound takes care of mixing them into the primary.
 *
 * Once you create a secondary buffer, you cannot change its format anymore so
gbazin's avatar
 
gbazin committed
626
 * you have to release the current one and create another.
627
 *****************************************************************************/
gbazin's avatar
 
gbazin committed
628 629 630
static int CreateDSBuffer( aout_instance_t *p_aout, int i_format,
                           int i_channels, int i_nb_channels, int i_rate,
                           int i_bytes_per_frame, vlc_bool_t b_probe )
631
{
gbazin's avatar
 
gbazin committed
632
    WAVEFORMATEXTENSIBLE waveformat;
633
    DSBUFFERDESC         dsbdesc;
gbazin's avatar
 
gbazin committed
634
    unsigned int         i;
635

gbazin's avatar
 
gbazin committed
636 637 638
    /* First set the sound buffer format */
    waveformat.dwChannelMask = 0;
    for( i = 0; i < sizeof(pi_channels_in)/sizeof(uint32_t); i++ )
gbazin's avatar
 
gbazin committed
639
    {
gbazin's avatar
 
gbazin committed
640 641
        if( i_channels & pi_channels_in[i] )
            waveformat.dwChannelMask |= pi_channels_out[i];
642
    }
gbazin's avatar
 
gbazin committed
643

gbazin's avatar
 
gbazin committed
644
    switch( i_format )
gbazin's avatar
 
gbazin committed
645
    {
gbazin's avatar
 
gbazin committed
646 647
    case VLC_FOURCC('s','p','d','i'):
        i_nb_channels = 2;
gbazin's avatar
 
gbazin committed
648 649
        /* To prevent channel re-ordering */
        waveformat.dwChannelMask = SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT;
gbazin's avatar
 
gbazin committed
650 651 652 653
        waveformat.Format.wBitsPerSample = 16;
        waveformat.Samples.wValidBitsPerSample =
            waveformat.Format.wBitsPerSample;
        waveformat.Format.wFormatTag = WAVE_FORMAT_DOLBY_AC3_SPDIF;
gbazin's avatar
 
gbazin committed
654
        waveformat.SubFormat = _KSDATAFORMAT_SUBTYPE_DOLBY_AC3_SPDIF;
gbazin's avatar
 
gbazin committed
655
        break;
gbazin's avatar
 
gbazin committed
656

gbazin's avatar
 
gbazin committed
657
    case VLC_FOURCC('f','l','3','2'):
gbazin's avatar
 
gbazin committed
658 659 660 661
        waveformat.Format.wBitsPerSample = sizeof(float) * 8;
        waveformat.Samples.wValidBitsPerSample =
            waveformat.Format.wBitsPerSample;
        waveformat.Format.wFormatTag = WAVE_FORMAT_IEEE_FLOAT;
gbazin's avatar
 
gbazin committed
662
        waveformat.SubFormat = _KSDATAFORMAT_SUBTYPE_IEEE_FLOAT;
gbazin's avatar
 
gbazin committed
663 664 665 666 667 668 669
        break;

    case VLC_FOURCC('s','1','6','l'):
        waveformat.Format.wBitsPerSample = 16;
        waveformat.Samples.wValidBitsPerSample =
            waveformat.Format.wBitsPerSample;
        waveformat.Format.wFormatTag = WAVE_FORMAT_PCM;
gbazin's avatar
 
gbazin committed
670
        waveformat.SubFormat = _KSDATAFORMAT_SUBTYPE_PCM;
gbazin's avatar
 
gbazin committed
671 672
        break;
    }
673

gbazin's avatar
 
gbazin committed
674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691
    waveformat.Format.nChannels = i_nb_channels;
    waveformat.Format.nSamplesPerSec = i_rate;
    waveformat.Format.nBlockAlign =
        waveformat.Format.wBitsPerSample / 8 * i_nb_channels;
    waveformat.Format.nAvgBytesPerSec =
        waveformat.Format.nSamplesPerSec * waveformat.Format.nBlockAlign;

    /* Only use the new WAVE_FORMAT_EXTENSIBLE format for multichannel audio */
    if( i_nb_channels <= 2 )
    {
        waveformat.Format.cbSize = 0;
    }
    else
    {
        waveformat.Format.wFormatTag = WAVE_FORMAT_EXTENSIBLE;
        waveformat.Format.cbSize =
            sizeof(WAVEFORMATEXTENSIBLE) - sizeof(WAVEFORMATEX);
    }
gbazin's avatar
 
gbazin committed
692

gbazin's avatar
 
gbazin committed
693 694

    /* Then fill in the direct sound descriptor */
gbazin's avatar
 
gbazin committed
695 696
    memset(&dsbdesc, 0, sizeof(DSBUFFERDESC));
    dsbdesc.dwSize = sizeof(DSBUFFERDESC);
697 698 699
    dsbdesc.dwFlags = DSBCAPS_GETCURRENTPOSITION2/* Better position accuracy */
                    | DSBCAPS_CTRLPOSITIONNOTIFY     /* We need notification */
                    | DSBCAPS_GLOBALFOCUS;      /* Allows background playing */
gbazin's avatar
 
gbazin committed
700 701 702 703 704 705 706
    dsbdesc.dwBufferBytes = FRAMES_NUM * i_bytes_per_frame;   /* buffer size */
    dsbdesc.lpwfxFormat = (WAVEFORMATEX *)&waveformat;

    if FAILED( IDirectSound_CreateSoundBuffer(
                   p_aout->output.p_sys->p_dsobject, &dsbdesc,
                   &p_aout->output.p_sys->p_dsbuffer, NULL) )
    {
gbazin's avatar
 
gbazin committed
707
        goto error;
708 709
    }

gbazin's avatar
 
gbazin committed
710 711 712 713 714 715 716
    /* Stop here if we were just probing */
    if( b_probe )
    {
        IDirectSoundBuffer_Release( p_aout->output.p_sys->p_dsbuffer );
        p_aout->output.p_sys->p_dsbuffer = NULL;
        return VLC_SUCCESS;
    }
gbazin's avatar
 
gbazin committed
717

gbazin's avatar
 
gbazin committed
718 719
    /* Backup the size of a frame */
    p_aout->output.p_sys->p_notif->i_frame_size = i_bytes_per_frame;
720 721 722

    /* Now the secondary buffer is created, we need to setup its position
     * notification */
gbazin's avatar
 
gbazin committed
723 724 725 726 727 728 729
    for( i = 0; i < FRAMES_NUM; i++ )
    {
        p_aout->output.p_sys->p_notif->p_events[i].dwOffset = i *
            p_aout->output.p_sys->p_notif->i_frame_size;

        p_aout->output.p_sys->p_notif->i_frame_status[i] = FRAME_EMPTY;
    }
730 731

    /* Get the IDirectSoundNotify interface */
gbazin's avatar
 
gbazin committed
732 733 734 735
    if FAILED( IDirectSoundBuffer_QueryInterface(
                                p_aout->output.p_sys->p_dsbuffer,
                                &IID_IDirectSoundNotify,
                                (LPVOID *)&p_aout->output.p_sys->p_dsnotify ) )
736
    {
gbazin's avatar
 
gbazin committed
737
        msg_Err( p_aout, "cannot get IDirectSoundNotify interface" );
gbazin's avatar
 
gbazin committed
738
        goto error;
739
    }
gbazin's avatar
 
gbazin committed
740

741
    if FAILED( IDirectSoundNotify_SetNotificationPositions(
gbazin's avatar
 
gbazin committed
742 743
                                    p_aout->output.p_sys->p_dsnotify,
                                    FRAMES_NUM,
gbazin's avatar
 
gbazin committed
744
                                    p_aout->output.p_sys->p_notif->p_events ) )
745
    {
gbazin's avatar
 
gbazin committed
746
        msg_Err( p_aout, "cannot set position notification" );
gbazin's avatar
 
gbazin committed
747
        goto error;
748
    }
gbazin's avatar
 
gbazin committed
749

gbazin's avatar
 
gbazin committed
750 751
    p_aout->output.p_sys->i_channel_mask = waveformat.dwChannelMask;
    CheckReordering( p_aout, i_nb_channels );
gbazin's avatar
 
gbazin committed
752

gbazin's avatar
 
gbazin committed
753
    return VLC_SUCCESS;
gbazin's avatar
 
gbazin committed
754 755 756 757 758 759 760 761 762 763 764 765

 error:
    if( p_aout->output.p_sys->p_dsbuffer )
    {
        IDirectSoundBuffer_Release( p_aout->output.p_sys->p_dsbuffer );
        p_aout->output.p_sys->p_dsbuffer = NULL;
    }
    if( p_aout->output.p_sys->p_dsnotify )
    {
        IDirectSoundBuffer_Release( p_aout->output.p_sys->p_dsbuffer );
        p_aout->output.p_sys->p_dsnotify = NULL;
    }
766
    return VLC_EGENERIC;
767 768 769
}

/*****************************************************************************
gbazin's avatar
 
gbazin committed
770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805
 * CreateDSBufferPCM: creates a PCM direct sound buffer.
 *****************************************************************************
 * We first try to create a WAVE_FORMAT_IEEE_FLOAT buffer if supported by
 * the hardware, otherwise we create a WAVE_FORMAT_PCM buffer.
 ****************************************************************************/
static int CreateDSBufferPCM( aout_instance_t *p_aout, int *i_format,
                              int i_channels, int i_nb_channels, int i_rate,
                              vlc_bool_t b_probe )
{
    if( CreateDSBuffer( p_aout, VLC_FOURCC('f','l','3','2'),
                        i_channels, i_nb_channels, i_rate,
                        FRAME_SIZE * 4 * i_nb_channels, b_probe )
        != VLC_SUCCESS )
    {
        if ( CreateDSBuffer( p_aout, VLC_FOURCC('s','1','6','l'),
                             i_channels, i_nb_channels, i_rate,
                             FRAME_SIZE * 2 * i_nb_channels, b_probe )
             != VLC_SUCCESS )
        {
            return VLC_EGENERIC;
        }
        else
        {
            *i_format = VLC_FOURCC('s','1','6','l');
            return VLC_SUCCESS;
        }
    }
    else
    {
        *i_format = VLC_FOURCC('f','l','3','2');
        return VLC_SUCCESS;
    }
}

/*****************************************************************************
 * DestroyDSBuffer
806
 *****************************************************************************
gbazin's avatar
 
gbazin committed
807
 * This function destroys the secondary buffer.
808
 *****************************************************************************/
gbazin's avatar
 
gbazin committed
809
static void DestroyDSBuffer( aout_instance_t *p_aout )
810
{
gbazin's avatar
 
gbazin committed
811
    if( p_aout->output.p_sys->p_dsnotify )
812
    {
gbazin's avatar
 
gbazin committed
813 814
        IDirectSoundNotify_Release( p_aout->output.p_sys->p_dsnotify );
        p_aout->output.p_sys->p_dsnotify = NULL;
815 816
    }

gbazin's avatar
 
gbazin committed
817
    if( p_aout->output.p_sys->p_dsbuffer )
818
    {
gbazin's avatar
 
gbazin committed
819 820
        IDirectSoundBuffer_Release( p_aout->output.p_sys->p_dsbuffer );
        p_aout->output.p_sys->p_dsbuffer = NULL;
821 822 823
    }
}

gbazin's avatar
 
gbazin committed
824
/*****************************************************************************
gbazin's avatar
 
gbazin committed
825
 * FillBuffer: Fill in one of the direct sound frame buffers.
gbazin's avatar
 
gbazin committed
826 827 828
 *****************************************************************************
 * Returns VLC_SUCCESS on success.
 *****************************************************************************/
gbazin's avatar
 
gbazin committed
829 830
static int FillBuffer( aout_instance_t *p_aout, int i_frame,
                       aout_buffer_t *p_buffer )
gbazin's avatar
 
gbazin committed
831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862
{
    notification_thread_t *p_notif = p_aout->output.p_sys->p_notif;
    void *p_write_position, *p_wrap_around;
    long l_bytes1, l_bytes2;
    HRESULT dsresult;

    /* Before copying anything, we have to lock the buffer */
    dsresult = IDirectSoundBuffer_Lock(
                p_aout->output.p_sys->p_dsbuffer,               /* DS buffer */
                i_frame * p_notif->i_frame_size,             /* Start offset */
                p_notif->i_frame_size,                    /* Number of bytes */
                &p_write_position,                  /* Address of lock start */
                &l_bytes1,       /* Count of bytes locked before wrap around */
                &p_wrap_around,            /* Buffer adress (if wrap around) */
                &l_bytes2,               /* Count of bytes after wrap around */
                0 );                                                /* Flags */
    if( dsresult == DSERR_BUFFERLOST )
    {
        IDirectSoundBuffer_Restore( p_aout->output.p_sys->p_dsbuffer );
        dsresult = IDirectSoundBuffer_Lock(
                               p_aout->output.p_sys->p_dsbuffer,
                               i_frame * p_notif->i_frame_size,
                               p_notif->i_frame_size,
                               &p_write_position,
                               &l_bytes1,
                               &p_wrap_around,
                               &l_bytes2,
                               0 );
    }
    if( dsresult != DS_OK )
    {
        msg_Warn( p_notif, "cannot lock buffer" );
gbazin's avatar
 
gbazin committed
863
        if( p_buffer ) aout_BufferFree( p_buffer );
gbazin's avatar
 
gbazin committed
864 865 866
        return VLC_EGENERIC;
    }

gbazin's avatar
 
gbazin committed
867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886
    if( p_buffer == NULL )
    {
        memset( p_write_position, 0, l_bytes1 );
    }
    else if( p_aout->output.p_sys->b_chan_reorder )
    {
        /* Do the channel reordering here */

        if( p_aout->output.output.i_format ==  VLC_FOURCC('s','1','6','l') )
          InterleaveS16( (int16_t *)p_buffer->p_buffer,
                         (int16_t *)p_write_position,
                         p_aout->output.p_sys->pi_chan_table,
                         aout_FormatNbChannels( &p_aout->output.output ) );
        else
          InterleaveFloat32( (float *)p_buffer->p_buffer,
                             (float *)p_write_position,
                             p_aout->output.p_sys->pi_chan_table,
                             aout_FormatNbChannels( &p_aout->output.output ) );
    }
    else
gbazin's avatar
 
gbazin committed
887
    {
gbazin's avatar
 
gbazin committed
888 889
        p_aout->p_vlc->pf_memcpy( p_write_position, p_buffer->p_buffer,
                                  l_bytes1 );
gbazin's avatar
 
gbazin committed
890 891
        aout_BufferFree( p_buffer );
    }
gbazin's avatar
 
gbazin committed
892 893 894 895 896 897 898 899 900

    /* Now the data has been copied, unlock the buffer */
    IDirectSoundBuffer_Unlock( p_aout->output.p_sys->p_dsbuffer,
                               p_write_position, l_bytes1,
                               p_wrap_around, l_bytes2 );

    return VLC_SUCCESS;
}

901 902 903
/*****************************************************************************
 * DirectSoundThread: this thread will capture play notification events. 
 *****************************************************************************
gbazin's avatar
 
gbazin committed
904 905
 * We use this thread to emulate a callback mechanism. The thread probes for
 * event notification and fills up the DS secondary buffer when needed.
906 907 908
 *****************************************************************************/
static void DirectSoundThread( notification_thread_t *p_notif )
{
gbazin's avatar
 
gbazin committed
909
    HANDLE  notification_events[FRAMES_NUM];
910
    HRESULT dsresult;
gbazin's avatar
 
gbazin committed
911
    aout_instance_t *p_aout = p_notif->p_aout;
gbazin's avatar
 
gbazin committed
912 913
    int i, i_which_frame, i_last_frame, i_next_frame;
    mtime_t mtime;
gbazin's avatar
 
gbazin committed
914
    vlc_bool_t b_sleek;
915

gbazin's avatar
 
gbazin committed
916 917
    for( i = 0; i < FRAMES_NUM; i++ )
        notification_events[i] = p_notif->p_events[i].hEventNotify;
918

gbazin's avatar
 
gbazin committed
919 920 921
    /* We don't want any resampling when using S/PDIF output */
    b_sleek = p_aout->output.output.i_format == VLC_FOURCC('s','p','d','i');

922 923 924 925 926
    /* Tell the main thread that we are ready */
    vlc_thread_ready( p_notif );

    msg_Dbg( p_notif, "DirectSoundThread ready" );

gbazin's avatar
 
gbazin committed
927 928
    /* Wait here until Play() is called */
    WaitForSingleObject( notification_events[0], INFINITE );
gbazin's avatar
 
gbazin committed
929

gbazin's avatar
 
gbazin committed
930 931 932
    if( !p_notif->b_die )
    {
        mwait( p_notif->start_date - AOUT_PTS_TOLERANCE / 2 );
933

gbazin's avatar
 
gbazin committed
934 935 936 937 938
        /* start playing the buffer */
        dsresult = IDirectSoundBuffer_Play( p_aout->output.p_sys->p_dsbuffer,
                                        0,                         /* Unused */
                                        0,                         /* Unused */
                                        DSBPLAY_LOOPING );          /* Flags */
gbazin's avatar
 
gbazin committed
939
        if( dsresult == DSERR_BUFFERLOST )
940
        {
gbazin's avatar
 
gbazin committed
941
            IDirectSoundBuffer_Restore( p_aout->output.p_sys->p_dsbuffer );
gbazin's avatar
 
gbazin committed
942 943 944 945 946
            dsresult = IDirectSoundBuffer_Play(
                                            p_aout->output.p_sys->p_dsbuffer,
                                            0,                     /* Unused */
                                            0,                     /* Unused */
                                            DSBPLAY_LOOPING );      /* Flags */
947
        }
gbazin's avatar
 
gbazin committed
948
        if( dsresult != DS_OK )
949
        {
gbazin's avatar
 
gbazin committed
950
            msg_Err( p_aout, "cannot start playing buffer" );
951
        }
gbazin's avatar
 
gbazin committed
952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967
    }

    while( !p_notif->b_die )
    {
        aout_buffer_t *p_buffer;
        long l_latency;

        /* wait for the position notification */
        i_which_frame = WaitForMultipleObjects( FRAMES_NUM,
                                                notification_events, 0,
                                                INFINITE ) - WAIT_OBJECT_0;

        if( p_notif->b_die )
            break;

        mtime = mdate();
968

gbazin's avatar
 
gbazin committed
969
        /* We take into account the current latency */
gbazin's avatar
 
gbazin committed
970 971 972
        if SUCCEEDED( IDirectSoundBuffer_GetCurrentPosition(
                        p_aout->output.p_sys->p_dsbuffer,
                        &l_latency, NULL ) )
gbazin's avatar
 
gbazin committed
973
        {
gbazin's avatar
 
gbazin committed
974 975
            if( l_latency > (i_which_frame * FRAME_SIZE)
                  && l_latency < ((i_which_frame+1) * FRAME_SIZE) )
gbazin's avatar
 
gbazin committed
976
            {
gbazin's avatar
 
gbazin committed
977 978 979
                l_latency = - ( l_latency /
                                p_aout->output.output.i_bytes_per_frame %
                                FRAME_SIZE );
gbazin's avatar
 
gbazin committed
980 981 982
            }
            else
            {
gbazin's avatar
 
gbazin committed
983
                l_latency = FRAME_SIZE - ( l_latency /
gbazin's avatar
 
gbazin committed
984 985 986 987 988 989
                                      p_aout->output.output.i_bytes_per_frame %
                                      FRAME_SIZE );
            }
        }
        else
        {
gbazin's avatar
 
gbazin committed
990
            l_latency = 0;
gbazin's avatar
 
gbazin committed
991 992
        }

gbazin's avatar
 
gbazin committed
993 994 995 996
        /* Mark last frame as empty */
        i_last_frame = (i_which_frame + FRAMES_NUM -1) % FRAMES_NUM;
        i_next_frame = (i_which_frame + 1) % FRAMES_NUM;
        p_notif->i_frame_status[i_last_frame] = FRAME_EMPTY;
997

gbazin's avatar
 
gbazin committed
998 999
        /* Try to fill in as many frame buffers as possible */
        for( i = i_next_frame; (i % FRAMES_NUM) != i_which_frame; i++ )
1000 1001
        {

gbazin's avatar
 
gbazin committed
1002 1003 1004 1005 1006 1007
            /* Check if frame buf is already filled */
            if( p_notif->i_frame_status[i % FRAMES_NUM] == FRAME_QUEUED )
                continue;

            p_buffer = aout_OutputNextBuffer( p_aout,
                mtime + 1000000 / p_aout->output.output.i_rate *
gbazin's avatar
 
gbazin committed
1008
                ((i - i_next_frame + 1) * FRAME_SIZE + l_latency), b_sleek );
gbazin's avatar
 
gbazin committed
1009 1010 1011 1012 1013 1014 1015 1016 1017 1018

            /* If there is no audio data available and we have some buffered
             * already, then just wait for the next time */
            if( !p_buffer && (i != i_next_frame) )
            {
                //msg_Err( p_aout, "only %i frame buffers filled!",
                //         i - i_next_frame );
                break;
            }

gbazin's avatar
 
gbazin committed
1019
            if( FillBuffer( p_aout, (i%FRAMES_NUM), p_buffer )
gbazin's avatar
 
gbazin committed
1020 1021 1022 1023 1024 1025
                != VLC_SUCCESS )
                break;

            /* Mark the frame buffer as QUEUED */
            p_notif->i_frame_status[i%FRAMES_NUM] = FRAME_QUEUED;
        }
1026 1027 1028

    }

gbazin's avatar
 
gbazin committed
1029 1030 1031
    /* make sure the buffer isn't playing */
    IDirectSoundBuffer_Stop( p_aout->output.p_sys->p_dsbuffer );

1032
    /* free the events */
gbazin's avatar
 
gbazin committed
1033 1034
    for( i = 0; i < FRAMES_NUM; i++ )
        CloseHandle( notification_events[i] );
1035 1036 1037

    msg_Dbg( p_notif, "DirectSoundThread exiting" );
}
gbazin's avatar
 
gbazin committed
1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098

/*****************************************************************************
 * CheckReordering: Check if we need to do some channel re-ordering (the ac3
 *                  channel order is different from the one chosen by
 *                  Microsoft).
 *****************************************************************************/
static void CheckReordering( aout_instance_t *p_aout, int i_nb_channels )
{
    int i, j, k, l;

#define i_channel_mask p_aout->output.p_sys->i_channel_mask
#define pi_chan_table p_aout->output.p_sys->pi_chan_table

    p_aout->output.p_sys->b_chan_reorder = VLC_FALSE;

    pi_chan_table = malloc( i_nb_channels * sizeof(int) );
    if( !pi_chan_table )
    {
        return;
    }

    for( i = 0, j = 0;
         i < (int)(sizeof(pi_channels_out)/sizeof(uint32_t)); i++ )
    {
        if( i_channel_mask & pi_channels_out[i] )
        {
            for( k = 0, l = 0;
                 pi_channels_out[i] != pi_channels_ordered[k]; k++ )
            {
                if( i_channel_mask & pi_channels_ordered[k] )
                {
                    l++;
                }
            }

            pi_chan_table[j] = l;

            j++;
        }
    }

    for( i = 0; i < i_nb_channels; i++ )
    {
        if( pi_chan_table[i] != i )
        {
            p_aout->output.p_sys->b_chan_reorder = VLC_TRUE;
        }
    }

    if( p_aout->output.p_sys->b_chan_reorder )
    {
        msg_Dbg( p_aout, "channel reordering needed" );
    }

#undef pi_chan_table
#undef waveformat
}

/*****************************************************************************
 * InterleaveFloat32/S16: change the channel order to the Microsoft one.
 *****************************************************************************/
gbazin's avatar
 
gbazin committed
1099 1100
static void InterleaveFloat32( float *p_buf, float *p_buf_out,
                               int *pi_chan_table, int i_nb_channels )
gbazin's avatar
 
gbazin committed
1101 1102 1103 1104 1105 1106 1107
{
    int i, j;

    for( i = 0; i < FRAME_SIZE; i++ )
    {
        for( j = 0; j < i_nb_channels; j++ )
        {
gbazin's avatar
 
gbazin committed
1108 1109
            p_buf_out[i*i_nb_channels + pi_chan_table[j]] =
                p_buf[i*i_nb_channels + j];
gbazin's avatar
 
gbazin committed
1110 1111 1112 1113
        }
    }
}

gbazin's avatar
 
gbazin committed
1114 1115
static void InterleaveS16( int16_t *p_buf, int16_t *p_buf_out,
                           int *pi_chan_table, int i_nb_channels )
gbazin's avatar
 
gbazin committed
1116 1117 1118 1119 1120 1121 1122
{
    int i, j;

    for( i = 0; i < FRAME_SIZE; i++ )
    {
        for( j = 0; j < i_nb_channels; j++ )
        {
gbazin's avatar
 
gbazin committed
1123 1124
            p_buf_out[ i*i_nb_channels + pi_chan_table[j]] =
                p_buf[i*i_nb_channels + j];
gbazin's avatar
 
gbazin committed
1125 1126 1127
        }
    }
}