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
        }
    }
}