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Typos s/hidding/hiding/g
[vlc/asuraparaju-public.git] / modules / audio_output / directx.c
blob9a41a8bd5e15bf3c98d02fa66185d20e9872ea7f
1 /*****************************************************************************
2 * directx.c: Windows DirectX audio output method
3 *****************************************************************************
4 * Copyright (C) 2001-2009 the VideoLAN team
5 * $Id$
6 *
7 * Authors: Gildas Bazin <gbazin@videolan.org>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software Foundation, Inc.,
21 * 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
23
24 /*****************************************************************************
25 * Preamble
26 *****************************************************************************/
27
28 #ifdef HAVE_CONFIG_H
29 # include "config.h"
30 #endif
31
32 #include <vlc_common.h>
33 #include <vlc_plugin.h>
34 #include <vlc_aout.h>
35 #include <vlc_charset.h>
36
37 #include "windows_audio_common.h"
38
39 #include <dsound.h>
40
41 #define FRAME_SIZE ((int)p_aout->output.output.i_rate/20) /* Size in samples */
42
43 /*****************************************************************************
44 * notification_thread_t: DirectX event thread
45 *****************************************************************************/
46 typedef struct notification_thread_t
47 {
48 VLC_COMMON_MEMBERS
49
50 aout_instance_t *p_aout;
51 int i_frame_size; /* size in bytes of one frame */
52 int i_write_slot; /* current write position in our circular buffer */
53
54 mtime_t start_date;
55 HANDLE event;
56
57 } notification_thread_t;
58
59 /*****************************************************************************
60 * aout_sys_t: directx audio output method descriptor
61 *****************************************************************************
62 * This structure is part of the audio output thread descriptor.
63 * It describes the direct sound specific properties of an audio device.
64 *****************************************************************************/
65 struct aout_sys_t
66 {
67 HINSTANCE hdsound_dll; /* handle of the opened dsound dll */
68
69 char * psz_device; /* user defined device name */
70 LPGUID p_device_guid;
71
72 LPDIRECTSOUND p_dsobject; /* main Direct Sound object */
73 LPDIRECTSOUNDBUFFER p_dsbuffer; /* the sound buffer we use (direct sound
74 * takes care of mixing all the
75 * secondary buffers into the primary) */
76
77 notification_thread_t *p_notif; /* DirectSoundThread id */
78
79 int b_playing; /* playing status */
80
81 int i_frame_size; /* Size in bytes of one frame */
82
83 int i_speaker_setup; /* Speaker setup override */
84
85 bool b_chan_reorder; /* do we need channel reordering */
86 int pi_chan_table[AOUT_CHAN_MAX];
87 uint32_t i_channel_mask;
88 uint32_t i_bits_per_sample;
89 uint32_t i_channels;
90 };
91
92 /*****************************************************************************
93 * Local prototypes.
94 *****************************************************************************/
95 static int OpenAudio ( vlc_object_t * );
96 static void CloseAudio ( vlc_object_t * );
97 static void Play ( aout_instance_t * );
98
99 /* local functions */
100 static void Probe ( aout_instance_t * );
101 static int InitDirectSound ( aout_instance_t * );
102 static int CreateDSBuffer ( aout_instance_t *, int, int, int, int, int, bool );
103 static int CreateDSBufferPCM ( aout_instance_t *, vlc_fourcc_t*, int, int, int, bool );
104 static void DestroyDSBuffer ( aout_instance_t * );
105 static void* DirectSoundThread( vlc_object_t * );
106 static int FillBuffer ( aout_instance_t *, int, aout_buffer_t * );
107
108 static int ReloadDirectXDevices( vlc_object_t *, char const *,
109 vlc_value_t, vlc_value_t, void * );
110
111 /* Speaker setup override options list */
112 static const char *const speaker_list[] = { "Windows default", "Mono", "Stereo",
113 "Quad", "5.1", "7.1" };
114 static const char *const ppsz_adev[] = {"default", };
115 static const char *const ppsz_adev_text[] = {"default", };
116
117 /*****************************************************************************
118 * Module descriptor
119 *****************************************************************************/
120 #define DEVICE_TEXT N_("Output device")
121 #define DEVICE_LONGTEXT N_("Select your audio output device")
122
123 #define SPEAKER_TEXT N_("Speaker configuration")
124 #define SPEAKER_LONGTEXT N_("Select speaker configuration you want to use. " \
125 "This option doesn't upmix! So NO e.g. Stereo -> 5.1 conversion." )
126
127 vlc_module_begin ()
128 set_description( N_("DirectX audio output") )
129 set_shortname( "DirectX" )
130 set_capability( "audio output", 100 )
131 set_category( CAT_AUDIO )
132 set_subcategory( SUBCAT_AUDIO_AOUT )
133 add_shortcut( "directx", "directsound" )
134
135 add_string( "directx-audio-device-name", "default", NULL,
136 DEVICE_TEXT, DEVICE_LONGTEXT, false )
137 add_deprecated_alias( "directx-audio-device" ) /* Since 1.1.0 */
138 change_string_list( ppsz_adev, ppsz_adev_text, ReloadDirectXDevices )
139 change_action_add( ReloadDirectXDevices, N_("Refresh list") )
140 change_need_restart ()
141 add_bool( "directx-audio-float32", false, NULL, FLOAT_TEXT,
142 FLOAT_LONGTEXT, true )
143 add_string( "directx-audio-speaker", "Windows default", NULL,
144 SPEAKER_TEXT, SPEAKER_LONGTEXT, true )
145 change_string_list( speaker_list, 0, 0 )
146 change_need_restart ()
147
148 set_callbacks( OpenAudio, CloseAudio )
149 vlc_module_end ()
150
151 /*****************************************************************************
152 * OpenAudio: open the audio device
153 *****************************************************************************
154 * This function opens and setups Direct Sound.
155 *****************************************************************************/
156 static int OpenAudio( vlc_object_t *p_this )
157 {
158 aout_instance_t * p_aout = (aout_instance_t *)p_this;
159 vlc_value_t val;
160 char * psz_speaker;
161 int i = 0;
162
163 const char * const * ppsz_compare = speaker_list;
164
165 msg_Dbg( p_aout, "Opening DirectSound Audio Output" );
166
167 /* Allocate structure */
168 p_aout->output.p_sys = malloc( sizeof( aout_sys_t ) );
169 if( p_aout->output.p_sys == NULL )
170 return VLC_ENOMEM;
171
172 /* Initialize some variables */
173 p_aout->output.p_sys->p_dsobject = NULL;
174 p_aout->output.p_sys->p_dsbuffer = NULL;
175 p_aout->output.p_sys->p_notif = NULL;
176 p_aout->output.p_sys->b_playing = 0;
177
178 p_aout->output.pf_play = Play;
179 aout_VolumeSoftInit( p_aout );
180
181 /* Retrieve config values */
182 var_Create( p_aout, "directx-audio-float32",
183 VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
184 psz_speaker = var_CreateGetString( p_aout, "directx-audio-speaker" );
185
186 while ( *ppsz_compare != NULL )
187 {
188 if ( !strncmp( *ppsz_compare, psz_speaker, strlen(*ppsz_compare) ) )
189 {
190 break;
191 }
192 ppsz_compare++; i++;
193 }
194
195 if ( *ppsz_compare == NULL )
196 {
197 msg_Err( p_aout, "(%s) isn't valid speaker setup option", psz_speaker );
198 msg_Err( p_aout, "Defaulting to Windows default speaker config");
199 i = 0;
200 }
201 free( psz_speaker );
202 p_aout->output.p_sys->i_speaker_setup = i;
203
204 p_aout->output.p_sys->p_device_guid = 0;
205
206 /* Initialise DirectSound */
207 if( InitDirectSound( p_aout ) )
208 {
209 msg_Err( p_aout, "cannot initialize DirectSound" );
210 goto error;
211 }
212
213 if( var_Type( p_aout, "audio-device" ) == 0 )
214 {
215 Probe( p_aout );
216 }
217
218 if( var_Get( p_aout, "audio-device", &val ) < 0 )
219 {
220 /* Probe() has failed. */
221 goto error;
222 }
223
224 /* Open the device */
225 if( val.i_int == AOUT_VAR_SPDIF )
226 {
227 p_aout->output.output.i_format = VLC_CODEC_SPDIFL;
228
229 /* Calculate the frame size in bytes */
230 p_aout->output.i_nb_samples = A52_FRAME_NB;
231 p_aout->output.output.i_bytes_per_frame = AOUT_SPDIF_SIZE;
232 p_aout->output.output.i_frame_length = A52_FRAME_NB;
233 p_aout->output.p_sys->i_frame_size =
234 p_aout->output.output.i_bytes_per_frame;
235
236 if( CreateDSBuffer( p_aout, VLC_CODEC_SPDIFL,
237 p_aout->output.output.i_physical_channels,
238 aout_FormatNbChannels( &p_aout->output.output ),
239 p_aout->output.output.i_rate,
240 p_aout->output.p_sys->i_frame_size, false )
241 != VLC_SUCCESS )
242 {
243 msg_Err( p_aout, "cannot open directx audio device" );
244 free( p_aout->output.p_sys );
245 return VLC_EGENERIC;
246 }
247
248 aout_VolumeNoneInit( p_aout );
249 }
250 else
251 {
252 if( val.i_int == AOUT_VAR_5_1 )
253 {
254 p_aout->output.output.i_physical_channels
255 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
256 | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT
257 | AOUT_CHAN_LFE;
258 }
259 else if( val.i_int == AOUT_VAR_7_1 )
260 {
261 p_aout->output.output.i_physical_channels
262 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
263 | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT
264 | AOUT_CHAN_MIDDLELEFT | AOUT_CHAN_MIDDLERIGHT
265 | AOUT_CHAN_LFE;
266 }
267 else if( val.i_int == AOUT_VAR_3F2R )
268 {
269 p_aout->output.output.i_physical_channels
270 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
271 | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
272 }
273 else if( val.i_int == AOUT_VAR_2F2R )
274 {
275 p_aout->output.output.i_physical_channels
276 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT
277 | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
278 }
279 else if( val.i_int == AOUT_VAR_MONO )
280 {
281 p_aout->output.output.i_physical_channels = AOUT_CHAN_CENTER;
282 }
283 else
284 {
285 p_aout->output.output.i_physical_channels
286 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
287 }
288
289 if( CreateDSBufferPCM( p_aout, &p_aout->output.output.i_format,
290 p_aout->output.output.i_physical_channels,
291 aout_FormatNbChannels( &p_aout->output.output ),
292 p_aout->output.output.i_rate, false )
293 != VLC_SUCCESS )
294 {
295 msg_Err( p_aout, "cannot open directx audio device" );
296 free( p_aout->output.p_sys );
297 return VLC_EGENERIC;
298 }
299
300 /* Calculate the frame size in bytes */
301 p_aout->output.i_nb_samples = FRAME_SIZE;
302 aout_FormatPrepare( &p_aout->output.output );
303 aout_VolumeSoftInit( p_aout );
304 }
305
306 /* Now we need to setup our DirectSound play notification structure */
307 p_aout->output.p_sys->p_notif =
308 vlc_object_create( p_aout, sizeof(notification_thread_t) );
309 p_aout->output.p_sys->p_notif->p_aout = p_aout;
310
311 p_aout->output.p_sys->p_notif->event = CreateEvent( 0, FALSE, FALSE, 0 );
312 p_aout->output.p_sys->p_notif->i_frame_size =
313 p_aout->output.p_sys->i_frame_size;
314
315 /* then launch the notification thread */
316 msg_Dbg( p_aout, "creating DirectSoundThread" );
317 if( vlc_thread_create( p_aout->output.p_sys->p_notif,
318 "DirectSound Notification Thread",
319 DirectSoundThread,
320 VLC_THREAD_PRIORITY_HIGHEST ) )
321 {
322 msg_Err( p_aout, "cannot create DirectSoundThread" );
323 CloseHandle( p_aout->output.p_sys->p_notif->event );
324 vlc_object_release( p_aout->output.p_sys->p_notif );
325 p_aout->output.p_sys->p_notif = NULL;
326 goto error;
327 }
328
329 vlc_object_attach( p_aout->output.p_sys->p_notif, p_aout );
330
331 return VLC_SUCCESS;
332
333 error:
334 CloseAudio( VLC_OBJECT(p_aout) );
335 return VLC_EGENERIC;
336 }
337
338 /*****************************************************************************
339 * Probe: probe the audio device for available formats and channels
340 *****************************************************************************/
341 static void Probe( aout_instance_t * p_aout )
342 {
343 vlc_value_t val, text;
344 vlc_fourcc_t i_format;
345 unsigned int i_physical_channels;
346 DWORD ui_speaker_config;
347 bool is_default_output_set = false;
348
349 var_Create( p_aout, "audio-device", VLC_VAR_INTEGER | VLC_VAR_HASCHOICE );
350 text.psz_string = _("Audio Device");
351 var_Change( p_aout, "audio-device", VLC_VAR_SETTEXT, &text, NULL );
352
353 /* Test for 5.1 support */
354 i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
355 AOUT_CHAN_CENTER | AOUT_CHAN_REARLEFT |
356 AOUT_CHAN_REARRIGHT | AOUT_CHAN_LFE;
357 if( p_aout->output.output.i_physical_channels == i_physical_channels )
358 {
359 if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 6,
360 p_aout->output.output.i_rate, true )
361 == VLC_SUCCESS )
362 {
363 val.i_int = AOUT_VAR_5_1;
364 text.psz_string = (char*) "5.1";
365 var_Change( p_aout, "audio-device",
366 VLC_VAR_ADDCHOICE, &val, &text );
367 var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
368 is_default_output_set = true;
369 msg_Dbg( p_aout, "device supports 5.1 channels" );
370 }
371 }
372
373 /* Test for 7.1 support */
374 i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
375 AOUT_CHAN_CENTER | AOUT_CHAN_REARLEFT |
376 AOUT_CHAN_MIDDLELEFT | AOUT_CHAN_MIDDLERIGHT |
377 AOUT_CHAN_REARRIGHT | AOUT_CHAN_LFE;
378 if( p_aout->output.output.i_physical_channels == i_physical_channels )
379 {
380 if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 8,
381 p_aout->output.output.i_rate, true )
382 == VLC_SUCCESS )
383 {
384 val.i_int = AOUT_VAR_7_1;
385 text.psz_string = (char*) "7.1";
386 var_Change( p_aout, "audio-device",
387 VLC_VAR_ADDCHOICE, &val, &text );
388 var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
389 is_default_output_set = true;
390 msg_Dbg( p_aout, "device supports 7.1 channels" );
391 }
392 }
393
394 /* Test for 3 Front 2 Rear support */
395 i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
396 AOUT_CHAN_CENTER | AOUT_CHAN_REARLEFT |
397 AOUT_CHAN_REARRIGHT;
398 if( p_aout->output.output.i_physical_channels == i_physical_channels )
399 {
400 if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 5,
401 p_aout->output.output.i_rate, true )
402 == VLC_SUCCESS )
403 {
404 val.i_int = AOUT_VAR_3F2R;
405 text.psz_string = _("3 Front 2 Rear");
406 var_Change( p_aout, "audio-device",
407 VLC_VAR_ADDCHOICE, &val, &text );
408 if(!is_default_output_set)
409 {
410 var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
411 is_default_output_set = true;
412 }
413 msg_Dbg( p_aout, "device supports 5 channels" );
414 }
415 }
416
417 /* Test for 2 Front 2 Rear support */
418 i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
419 AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
420 if( ( p_aout->output.output.i_physical_channels & i_physical_channels )
421 == i_physical_channels )
422 {
423 if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 4,
424 p_aout->output.output.i_rate, true )
425 == VLC_SUCCESS )
426 {
427 val.i_int = AOUT_VAR_2F2R;
428 text.psz_string = _("2 Front 2 Rear");
429 var_Change( p_aout, "audio-device",
430 VLC_VAR_ADDCHOICE, &val, &text );
431 if(!is_default_output_set)
432 {
433 var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
434 is_default_output_set = true;
435 }
436 msg_Dbg( p_aout, "device supports 4 channels" );
437 }
438 }
439
440 /* Test for stereo support */
441 i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
442 if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 2,
443 p_aout->output.output.i_rate, true )
444 == VLC_SUCCESS )
445 {
446 val.i_int = AOUT_VAR_STEREO;
447 text.psz_string = _("Stereo");
448 var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
449 if(!is_default_output_set)
450 {
451 var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
452 is_default_output_set = true;
453 msg_Dbg( p_aout, "device supports 2 channels (DEFAULT!)" );
454 }
455 else msg_Dbg( p_aout, "device supports 2 channels" );
456 }
457
458 /* Test for mono support */
459 i_physical_channels = AOUT_CHAN_CENTER;
460 if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 1,
461 p_aout->output.output.i_rate, true )
462 == VLC_SUCCESS )
463 {
464 val.i_int = AOUT_VAR_MONO;
465 text.psz_string = _("Mono");
466 var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
467 msg_Dbg( p_aout, "device supports 1 channel" );
468 }
469
470 /* Check the speaker configuration to determine which channel config should
471 * be the default */
472 if FAILED( IDirectSound_GetSpeakerConfig( p_aout->output.p_sys->p_dsobject,
473 &ui_speaker_config ) )
474 {
475 ui_speaker_config = DSSPEAKER_STEREO;
476 msg_Dbg( p_aout, "GetSpeakerConfig failed" );
477 }
478 switch( DSSPEAKER_CONFIG(ui_speaker_config) )
479 {
480 case DSSPEAKER_7POINT1:
481 msg_Dbg( p_aout, "Windows says your SpeakerConfig is 7.1" );
482 val.i_int = AOUT_VAR_7_1;
483 break;
484 case DSSPEAKER_5POINT1:
485 msg_Dbg( p_aout, "Windows says your SpeakerConfig is 5.1" );
486 val.i_int = AOUT_VAR_5_1;
487 break;
488 case DSSPEAKER_QUAD:
489 msg_Dbg( p_aout, "Windows says your SpeakerConfig is Quad" );
490 val.i_int = AOUT_VAR_2F2R;
491 break;
492 #if 0 /* Lots of people just get their settings wrong and complain that
493 * this is a problem with VLC so just don't ever set mono by default. */
494 case DSSPEAKER_MONO:
495 val.i_int = AOUT_VAR_MONO;
496 break;
497 #endif
498 case DSSPEAKER_SURROUND:
499 msg_Dbg( p_aout, "Windows says your SpeakerConfig is surround" );
500 case DSSPEAKER_STEREO:
501 msg_Dbg( p_aout, "Windows says your SpeakerConfig is stereo" );
502 default:
503 /* If nothing else is found, choose stereo output */
504 val.i_int = AOUT_VAR_STEREO;
505 break;
506 }
507
508 /* Check if we want to override speaker config */
509 switch( p_aout->output.p_sys->i_speaker_setup )
510 {
511 case 0: /* Default value aka Windows default speaker setup */
512 break;
513 case 1: /* Mono */
514 msg_Dbg( p_aout, "SpeakerConfig is forced to Mono" );
515 val.i_int = AOUT_VAR_MONO;
516 break;
517 case 2: /* Stereo */
518 msg_Dbg( p_aout, "SpeakerConfig is forced to Stereo" );
519 val.i_int = AOUT_VAR_STEREO;
520 break;
521 case 3: /* Quad */
522 msg_Dbg( p_aout, "SpeakerConfig is forced to Quad" );
523 val.i_int = AOUT_VAR_2F2R;
524 break;
525 case 4: /* 5.1 */
526 msg_Dbg( p_aout, "SpeakerConfig is forced to 5.1" );
527 val.i_int = AOUT_VAR_5_1;
528 break;
529 case 5: /* 7.1 */
530 msg_Dbg( p_aout, "SpeakerConfig is forced to 7.1" );
531 val.i_int = AOUT_VAR_7_1;
532 break;
533 default:
534 msg_Dbg( p_aout, "SpeakerConfig is forced to non-existing value" );
535 break;
536 }
537
538 var_Set( p_aout, "audio-device", val );
539
540 /* Test for SPDIF support */
541 if ( AOUT_FMT_NON_LINEAR( &p_aout->output.output ) )
542 {
543 if( CreateDSBuffer( p_aout, VLC_CODEC_SPDIFL,
544 p_aout->output.output.i_physical_channels,
545 aout_FormatNbChannels( &p_aout->output.output ),
546 p_aout->output.output.i_rate,
547 AOUT_SPDIF_SIZE, true )
548 == VLC_SUCCESS )
549 {
550 msg_Dbg( p_aout, "device supports A/52 over S/PDIF" );
551 val.i_int = AOUT_VAR_SPDIF;
552 text.psz_string = _("A/52 over S/PDIF");
553 var_Change( p_aout, "audio-device",
554 VLC_VAR_ADDCHOICE, &val, &text );
555 if( var_InheritBool( p_aout, "spdif" ) )
556 var_Set( p_aout, "audio-device", val );
557 }
558 }
559
560 var_Change( p_aout, "audio-device", VLC_VAR_CHOICESCOUNT, &val, NULL );
561 if( val.i_int <= 0 )
562 {
563 /* Probe() has failed. */
564 var_Destroy( p_aout, "audio-device" );
565 return;
566 }
567
568 var_AddCallback( p_aout, "audio-device", aout_ChannelsRestart, NULL );
569 var_SetBool( p_aout, "intf-change", true );
570 }
571
572 /*****************************************************************************
573 * Play: we'll start playing the directsound buffer here because at least here
574 * we know the first buffer has been put in the aout fifo and we also
575 * know its date.
576 *****************************************************************************/
577 static void Play( aout_instance_t *p_aout )
578 {
579 if( !p_aout->output.p_sys->b_playing )
580 {
581 aout_buffer_t *p_buffer;
582
583 p_aout->output.p_sys->b_playing = 1;
584
585 /* get the playing date of the first aout buffer */
586 p_aout->output.p_sys->p_notif->start_date =
587 aout_FifoFirstDate( p_aout, &p_aout->output.fifo );
588
589 /* fill in the first samples */
590 for( int i = 0; i < FRAMES_NUM; i++ )
591 {
592 p_buffer = aout_FifoPop( p_aout, &p_aout->output.fifo );
593 if( !p_buffer ) break;
594 FillBuffer( p_aout, i, p_buffer );
595 }
596
597 /* wake up the audio output thread */
598 SetEvent( p_aout->output.p_sys->p_notif->event );
599 }
600 }
601
602 /*****************************************************************************
603 * CloseAudio: close the audio device
604 *****************************************************************************/
605 static void CloseAudio( vlc_object_t *p_this )
606 {
607 aout_instance_t * p_aout = (aout_instance_t *)p_this;
608 aout_sys_t *p_sys = p_aout->output.p_sys;
609
610 msg_Dbg( p_aout, "closing audio device" );
611
612 /* kill the position notification thread, if any */
613 if( p_sys->p_notif )
614 {
615 vlc_object_kill( p_sys->p_notif );
616 /* wake up the audio thread if needed */
617 if( !p_sys->b_playing ) SetEvent( p_sys->p_notif->event );
618
619 vlc_thread_join( p_sys->p_notif );
620 vlc_object_release( p_sys->p_notif );
621 }
622
623 /* release the secondary buffer */
624 DestroyDSBuffer( p_aout );
625
626 /* finally release the DirectSound object */
627 if( p_sys->p_dsobject ) IDirectSound_Release( p_sys->p_dsobject );
628
629 /* free DSOUND.DLL */
630 if( p_sys->hdsound_dll ) FreeLibrary( p_sys->hdsound_dll );
631
632 free( p_aout->output.p_sys->p_device_guid );
633 free( p_sys );
634 }
635
636 /*****************************************************************************
637 * CallBackDirectSoundEnum: callback to enumerate available devices
638 *****************************************************************************/
639 static int CALLBACK CallBackDirectSoundEnum( LPGUID p_guid, LPCWSTR psz_desc,
640 LPCWSTR psz_mod, LPVOID _p_aout )
641 {
642 VLC_UNUSED( psz_mod );
643
644 aout_instance_t *p_aout = (aout_instance_t *)_p_aout;
645
646 char *psz_device = FromWide( psz_desc );
647 msg_Dbg( p_aout, "found device: %s", psz_device );
648
649 if( p_aout->output.p_sys->psz_device &&
650 !strcmp(p_aout->output.p_sys->psz_device, psz_device) && p_guid )
651 {
652 /* Use the device corresponding to psz_device */
653 p_aout->output.p_sys->p_device_guid = malloc( sizeof( GUID ) );
654 *p_aout->output.p_sys->p_device_guid = *p_guid;
655 msg_Dbg( p_aout, "using device: %s", psz_device );
656 }
657 else
658 {
659 /* If no default device has been selected, chose the first one */
660 if( !p_aout->output.p_sys->psz_device && p_guid )
661 {
662 p_aout->output.p_sys->psz_device = strdup( psz_device );
663 p_aout->output.p_sys->p_device_guid = malloc( sizeof( GUID ) );
664 *p_aout->output.p_sys->p_device_guid = *p_guid;
665 msg_Dbg( p_aout, "using device: %s", psz_device );
666 }
667 }
668
669 free( psz_device );
670 return true;
671 }
672
673 /*****************************************************************************
674 * InitDirectSound: handle all the gory details of DirectSound initialisation
675 *****************************************************************************/
676 static int InitDirectSound( aout_instance_t *p_aout )
677 {
678 HRESULT (WINAPI *OurDirectSoundCreate)(LPGUID, LPDIRECTSOUND *, LPUNKNOWN);
679 HRESULT (WINAPI *OurDirectSoundEnumerate)(LPDSENUMCALLBACKW, LPVOID);
680
681 p_aout->output.p_sys->hdsound_dll = LoadLibrary("DSOUND.DLL");
682 if( p_aout->output.p_sys->hdsound_dll == NULL )
683 {
684 msg_Warn( p_aout, "cannot open DSOUND.DLL" );
685 goto error;
686 }
687
688 OurDirectSoundCreate = (void *)
689 GetProcAddress( p_aout->output.p_sys->hdsound_dll,
690 "DirectSoundCreate" );
691 if( OurDirectSoundCreate == NULL )
692 {
693 msg_Warn( p_aout, "GetProcAddress FAILED" );
694 goto error;
695 }
696
697 /* Get DirectSoundEnumerate */
698 OurDirectSoundEnumerate = (void *)
699 GetProcAddress( p_aout->output.p_sys->hdsound_dll,
700 "DirectSoundEnumerateW" );
701 if( OurDirectSoundEnumerate )
702 {
703 p_aout->output.p_sys->psz_device = var_InheritString(p_aout, "directx-audio-device-name");
704 /* Attempt enumeration */
705 if( FAILED( OurDirectSoundEnumerate( CallBackDirectSoundEnum,
706 p_aout ) ) )
707 {
708 msg_Dbg( p_aout, "enumeration of DirectSound devices failed" );
709 }
710 }
711
712 /* Create the direct sound object */
713 if FAILED( OurDirectSoundCreate( p_aout->output.p_sys->p_device_guid,
714 &p_aout->output.p_sys->p_dsobject,
715 NULL ) )
716 {
717 msg_Warn( p_aout, "cannot create a direct sound device" );
718 goto error;
719 }
720
721 /* Set DirectSound Cooperative level, ie what control we want over Windows
722 * sound device. In our case, DSSCL_EXCLUSIVE means that we can modify the
723 * settings of the primary buffer, but also that only the sound of our
724 * application will be hearable when it will have the focus.
725 * !!! (this is not really working as intended yet because to set the
726 * cooperative level you need the window handle of your application, and
727 * I don't know of any easy way to get it. Especially since we might play
728 * sound without any video, and so what window handle should we use ???
729 * The hack for now is to use the Desktop window handle - it seems to be
730 * working */
731 if( IDirectSound_SetCooperativeLevel( p_aout->output.p_sys->p_dsobject,
732 GetDesktopWindow(),
733 DSSCL_EXCLUSIVE) )
734 {
735 msg_Warn( p_aout, "cannot set direct sound cooperative level" );
736 }
737
738 return VLC_SUCCESS;
739
740 error:
741 p_aout->output.p_sys->p_dsobject = NULL;
742 if( p_aout->output.p_sys->hdsound_dll )
743 {
744 FreeLibrary( p_aout->output.p_sys->hdsound_dll );
745 p_aout->output.p_sys->hdsound_dll = NULL;
746 }
747 return VLC_EGENERIC;
748
749 }
750
751 /*****************************************************************************
752 * CreateDSBuffer: Creates a direct sound buffer of the required format.
753 *****************************************************************************
754 * This function creates the buffer we'll use to play audio.
755 * In DirectSound there are two kinds of buffers:
756 * - the primary buffer: which is the actual buffer that the soundcard plays
757 * - the secondary buffer(s): these buffers are the one actually used by
758 * applications and DirectSound takes care of mixing them into the primary.
759 *
760 * Once you create a secondary buffer, you cannot change its format anymore so
761 * you have to release the current one and create another.
762 *****************************************************************************/
763 static int CreateDSBuffer( aout_instance_t *p_aout, int i_format,
764 int i_channels, int i_nb_channels, int i_rate,
765 int i_bytes_per_frame, bool b_probe )
766 {
767 WAVEFORMATEXTENSIBLE waveformat;
768 DSBUFFERDESC dsbdesc;
769 unsigned int i;
770
771 /* First set the sound buffer format */
772 waveformat.dwChannelMask = 0;
773 for( i = 0; i < sizeof(pi_channels_src)/sizeof(uint32_t); i++ )
774 {
775 if( i_channels & pi_channels_src[i] )
776 waveformat.dwChannelMask |= pi_channels_in[i];
777 }
778
779 switch( i_format )
780 {
781 case VLC_CODEC_SPDIFL:
782 i_nb_channels = 2;
783 /* To prevent channel re-ordering */
784 waveformat.dwChannelMask = SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT;
785 waveformat.Format.wBitsPerSample = 16;
786 waveformat.Samples.wValidBitsPerSample =
787 waveformat.Format.wBitsPerSample;
788 waveformat.Format.wFormatTag = WAVE_FORMAT_DOLBY_AC3_SPDIF;
789 waveformat.SubFormat = _KSDATAFORMAT_SUBTYPE_DOLBY_AC3_SPDIF;
790 break;
791
792 case VLC_CODEC_FL32:
793 waveformat.Format.wBitsPerSample = sizeof(float) * 8;
794 waveformat.Samples.wValidBitsPerSample =
795 waveformat.Format.wBitsPerSample;
796 waveformat.Format.wFormatTag = WAVE_FORMAT_IEEE_FLOAT;
797 waveformat.SubFormat = _KSDATAFORMAT_SUBTYPE_IEEE_FLOAT;
798 break;
799
800 case VLC_CODEC_S16L:
801 waveformat.Format.wBitsPerSample = 16;
802 waveformat.Samples.wValidBitsPerSample =
803 waveformat.Format.wBitsPerSample;
804 waveformat.Format.wFormatTag = WAVE_FORMAT_PCM;
805 waveformat.SubFormat = _KSDATAFORMAT_SUBTYPE_PCM;
806 break;
807 }
808
809 waveformat.Format.nChannels = i_nb_channels;
810 waveformat.Format.nSamplesPerSec = i_rate;
811 waveformat.Format.nBlockAlign =
812 waveformat.Format.wBitsPerSample / 8 * i_nb_channels;
813 waveformat.Format.nAvgBytesPerSec =
814 waveformat.Format.nSamplesPerSec * waveformat.Format.nBlockAlign;
815
816 p_aout->output.p_sys->i_bits_per_sample = waveformat.Format.wBitsPerSample;
817 p_aout->output.p_sys->i_channels = i_nb_channels;
818
819 /* Then fill in the direct sound descriptor */
820 memset(&dsbdesc, 0, sizeof(DSBUFFERDESC));
821 dsbdesc.dwSize = sizeof(DSBUFFERDESC);
822 dsbdesc.dwFlags = DSBCAPS_GETCURRENTPOSITION2/* Better position accuracy */
823 | DSBCAPS_GLOBALFOCUS; /* Allows background playing */
824
825 /* Only use the new WAVE_FORMAT_EXTENSIBLE format for multichannel audio */
826 if( i_nb_channels <= 2 )
827 {
828 waveformat.Format.cbSize = 0;
829 }
830 else
831 {
832 waveformat.Format.wFormatTag = WAVE_FORMAT_EXTENSIBLE;
833 waveformat.Format.cbSize =
834 sizeof(WAVEFORMATEXTENSIBLE) - sizeof(WAVEFORMATEX);
835
836 /* Needed for 5.1 on emu101k */
837 dsbdesc.dwFlags |= DSBCAPS_LOCHARDWARE;
838 }
839
840 dsbdesc.dwBufferBytes = FRAMES_NUM * i_bytes_per_frame; /* buffer size */
841 dsbdesc.lpwfxFormat = (WAVEFORMATEX *)&waveformat;
842
843 if FAILED( IDirectSound_CreateSoundBuffer(
844 p_aout->output.p_sys->p_dsobject, &dsbdesc,
845 &p_aout->output.p_sys->p_dsbuffer, NULL) )
846 {
847 if( dsbdesc.dwFlags & DSBCAPS_LOCHARDWARE )
848 {
849 /* Try without DSBCAPS_LOCHARDWARE */
850 dsbdesc.dwFlags &= ~DSBCAPS_LOCHARDWARE;
851 if FAILED( IDirectSound_CreateSoundBuffer(
852 p_aout->output.p_sys->p_dsobject, &dsbdesc,
853 &p_aout->output.p_sys->p_dsbuffer, NULL) )
854 {
855 return VLC_EGENERIC;
856 }
857 if( !b_probe )
858 msg_Dbg( p_aout, "couldn't use hardware sound buffer" );
859 }
860 else
861 {
862 return VLC_EGENERIC;
863 }
864 }
865
866 /* Stop here if we were just probing */
867 if( b_probe )
868 {
869 IDirectSoundBuffer_Release( p_aout->output.p_sys->p_dsbuffer );
870 p_aout->output.p_sys->p_dsbuffer = NULL;
871 return VLC_SUCCESS;
872 }
873
874 p_aout->output.p_sys->i_frame_size = i_bytes_per_frame;
875 p_aout->output.p_sys->i_channel_mask = waveformat.dwChannelMask;
876 p_aout->output.p_sys->b_chan_reorder =
877 aout_CheckChannelReorder( pi_channels_in, pi_channels_out,
878 waveformat.dwChannelMask, i_nb_channels,
879 p_aout->output.p_sys->pi_chan_table );
880
881 if( p_aout->output.p_sys->b_chan_reorder )
882 {
883 msg_Dbg( p_aout, "channel reordering needed" );
884 }
885
886 return VLC_SUCCESS;
887 }
888
889 /*****************************************************************************
890 * CreateDSBufferPCM: creates a PCM direct sound buffer.
891 *****************************************************************************
892 * We first try to create a WAVE_FORMAT_IEEE_FLOAT buffer if supported by
893 * the hardware, otherwise we create a WAVE_FORMAT_PCM buffer.
894 ****************************************************************************/
895 static int CreateDSBufferPCM( aout_instance_t *p_aout, vlc_fourcc_t *i_format,
896 int i_channels, int i_nb_channels, int i_rate,
897 bool b_probe )
898 {
899 /* Float32 audio samples are not supported for 5.1 output on the emu101k */
900 if( !var_GetBool( p_aout, "directx-audio-float32" ) ||
901 i_nb_channels > 2 ||
902 CreateDSBuffer( p_aout, VLC_CODEC_FL32,
903 i_channels, i_nb_channels, i_rate,
904 FRAME_SIZE * 4 * i_nb_channels, b_probe )
905 != VLC_SUCCESS )
906 {
907 if ( CreateDSBuffer( p_aout, VLC_CODEC_S16L,
908 i_channels, i_nb_channels, i_rate,
909 FRAME_SIZE * 2 * i_nb_channels, b_probe )
910 != VLC_SUCCESS )
911 {
912 return VLC_EGENERIC;
913 }
914 else
915 {
916 *i_format = VLC_CODEC_S16L;
917 return VLC_SUCCESS;
918 }
919 }
920 else
921 {
922 *i_format = VLC_CODEC_FL32;
923 return VLC_SUCCESS;
924 }
925 }
926
927 /*****************************************************************************
928 * DestroyDSBuffer
929 *****************************************************************************
930 * This function destroys the secondary buffer.
931 *****************************************************************************/
932 static void DestroyDSBuffer( aout_instance_t *p_aout )
933 {
934 if( p_aout->output.p_sys->p_dsbuffer )
935 {
936 IDirectSoundBuffer_Release( p_aout->output.p_sys->p_dsbuffer );
937 p_aout->output.p_sys->p_dsbuffer = NULL;
938 }
939 }
940
941 /*****************************************************************************
942 * FillBuffer: Fill in one of the direct sound frame buffers.
943 *****************************************************************************
944 * Returns VLC_SUCCESS on success.
945 *****************************************************************************/
946 static int FillBuffer( aout_instance_t *p_aout, int i_frame,
947 aout_buffer_t *p_buffer )
948 {
949 notification_thread_t *p_notif = p_aout->output.p_sys->p_notif;
950 aout_sys_t *p_sys = p_aout->output.p_sys;
951 void *p_write_position, *p_wrap_around;
952 unsigned long l_bytes1, l_bytes2;
953 HRESULT dsresult;
954
955 /* Before copying anything, we have to lock the buffer */
956 dsresult = IDirectSoundBuffer_Lock(
957 p_sys->p_dsbuffer, /* DS buffer */
958 i_frame * p_notif->i_frame_size, /* Start offset */
959 p_notif->i_frame_size, /* Number of bytes */
960 &p_write_position, /* Address of lock start */
961 &l_bytes1, /* Count of bytes locked before wrap around */
962 &p_wrap_around, /* Buffer address (if wrap around) */
963 &l_bytes2, /* Count of bytes after wrap around */
964 0 ); /* Flags */
965 if( dsresult == DSERR_BUFFERLOST )
966 {
967 IDirectSoundBuffer_Restore( p_sys->p_dsbuffer );
968 dsresult = IDirectSoundBuffer_Lock(
969 p_sys->p_dsbuffer,
970 i_frame * p_notif->i_frame_size,
971 p_notif->i_frame_size,
972 &p_write_position,
973 &l_bytes1,
974 &p_wrap_around,
975 &l_bytes2,
976 0 );
977 }
978 if( dsresult != DS_OK )
979 {
980 msg_Warn( p_notif, "cannot lock buffer" );
981 if( p_buffer ) aout_BufferFree( p_buffer );
982 return VLC_EGENERIC;
983 }
984
985 if( p_buffer == NULL )
986 {
987 memset( p_write_position, 0, l_bytes1 );
988 }
989 else
990 {
991 if( p_sys->b_chan_reorder )
992 {
993 /* Do the channel reordering here */
994 aout_ChannelReorder( p_buffer->p_buffer, p_buffer->i_buffer,
995 p_sys->i_channels, p_sys->pi_chan_table,
996 p_sys->i_bits_per_sample );
997 }
998
999 vlc_memcpy( p_write_position, p_buffer->p_buffer, l_bytes1 );
1000 aout_BufferFree( p_buffer );
1001 }
1002
1003 /* Now the data has been copied, unlock the buffer */
1004 IDirectSoundBuffer_Unlock( p_sys->p_dsbuffer, p_write_position, l_bytes1,
1005 p_wrap_around, l_bytes2 );
1006
1007 p_notif->i_write_slot = (i_frame + 1) % FRAMES_NUM;
1008 return VLC_SUCCESS;
1009 }
1010
1011 /*****************************************************************************
1012 * DirectSoundThread: this thread will capture play notification events.
1013 *****************************************************************************
1014 * We use this thread to emulate a callback mechanism. The thread probes for
1015 * event notification and fills up the DS secondary buffer when needed.
1016 *****************************************************************************/
1017 static void* DirectSoundThread( vlc_object_t *p_this )
1018 {
1019 notification_thread_t *p_notif = (notification_thread_t*)p_this;
1020 aout_instance_t *p_aout = p_notif->p_aout;
1021 mtime_t last_time;
1022 int canc = vlc_savecancel ();
1023
1024 /* We don't want any resampling when using S/PDIF output */
1025 bool b_sleek = (p_aout->output.output.i_format == VLC_CODEC_SPDIFL);
1026
1027 msg_Dbg( p_notif, "DirectSoundThread ready" );
1028
1029 /* Wait here until Play() is called */
1030 WaitForSingleObject( p_notif->event, INFINITE );
1031
1032 if( vlc_object_alive (p_notif) )
1033 {
1034 HRESULT dsresult;
1035 mwait( p_notif->start_date - AOUT_PTS_TOLERANCE / 2 );
1036
1037 /* start playing the buffer */
1038 dsresult = IDirectSoundBuffer_Play( p_aout->output.p_sys->p_dsbuffer,
1039 0, /* Unused */
1040 0, /* Unused */
1041 DSBPLAY_LOOPING ); /* Flags */
1042 if( dsresult == DSERR_BUFFERLOST )
1043 {
1044 IDirectSoundBuffer_Restore( p_aout->output.p_sys->p_dsbuffer );
1045 dsresult = IDirectSoundBuffer_Play(
1046 p_aout->output.p_sys->p_dsbuffer,
1047 0, /* Unused */
1048 0, /* Unused */
1049 DSBPLAY_LOOPING ); /* Flags */
1050 }
1051 if( dsresult != DS_OK )
1052 {
1053 msg_Err( p_aout, "cannot start playing buffer" );
1054 }
1055 }
1056 last_time = mdate();
1057
1058 while( vlc_object_alive (p_notif) )
1059 {
1060 DWORD l_read;
1061 int l_queued = 0, l_free_slots;
1062 unsigned i_frame_siz = p_aout->output.i_nb_samples;
1063 mtime_t mtime = mdate();
1064 int i;
1065
1066 /*
1067 * Fill in as much audio data as we can in our circular buffer
1068 */
1069
1070 /* Find out current play position */
1071 if FAILED( IDirectSoundBuffer_GetCurrentPosition(
1072 p_aout->output.p_sys->p_dsbuffer, &l_read, NULL ) )
1073 {
1074 msg_Err( p_aout, "GetCurrentPosition() failed!" );
1075 l_read = 0;
1076 }
1077
1078 /* Detect underruns */
1079 if( l_queued && mtime - last_time >
1080 INT64_C(1000000) * l_queued / p_aout->output.output.i_rate )
1081 {
1082 msg_Dbg( p_aout, "detected underrun!" );
1083 }
1084 last_time = mtime;
1085
1086 /* Try to fill in as many frame buffers as possible */
1087 l_read /= (p_aout->output.output.i_bytes_per_frame /
1088 p_aout->output.output.i_frame_length);
1089 l_queued = p_notif->i_write_slot * i_frame_siz - l_read;
1090 if( l_queued < 0 ) l_queued += (i_frame_siz * FRAMES_NUM);
1091 l_free_slots = (FRAMES_NUM * i_frame_siz - l_queued) / i_frame_siz;
1092
1093 for( i = 0; i < l_free_slots; i++ )
1094 {
1095 aout_buffer_t *p_buffer = aout_OutputNextBuffer( p_aout,
1096 mtime + INT64_C(1000000) * (i * i_frame_siz + l_queued) /
1097 p_aout->output.output.i_rate, b_sleek );
1098
1099 /* If there is no audio data available and we have some buffered
1100 * already, then just wait for the next time */
1101 if( !p_buffer && (i || l_queued / i_frame_siz) ) break;
1102
1103 if( FillBuffer( p_aout, p_notif->i_write_slot % FRAMES_NUM,
1104 p_buffer ) != VLC_SUCCESS ) break;
1105 }
1106
1107 /* Sleep a reasonable amount of time */
1108 l_queued += (i * i_frame_siz);
1109 msleep( INT64_C(1000000) * l_queued / p_aout->output.output.i_rate / 2 );
1110 }
1111
1112 /* make sure the buffer isn't playing */
1113 IDirectSoundBuffer_Stop( p_aout->output.p_sys->p_dsbuffer );
1114
1115 /* free the event */
1116 CloseHandle( p_notif->event );
1117
1118 vlc_restorecancel (canc);
1119 msg_Dbg( p_notif, "DirectSoundThread exiting" );
1120 return NULL;
1121 }
1122
1123 /*****************************************************************************
1124 * CallBackConfigNBEnum: callback to get the number of available devices
1125 *****************************************************************************/
1126 static int CALLBACK CallBackConfigNBEnum( LPGUID p_guid, LPCWSTR psz_desc,
1127 LPCWSTR psz_mod, LPVOID p_nb )
1128 {
1129 VLC_UNUSED( psz_mod ); VLC_UNUSED( psz_desc ); VLC_UNUSED( p_guid );
1130
1131 int * a = (int *)p_nb;
1132 (*a)++;
1133 return true;
1134 }
1135
1136 /*****************************************************************************
1137 * CallBackConfigEnum: callback to add available devices to the preferences list
1138 *****************************************************************************/
1139 static int CALLBACK CallBackConfigEnum( LPGUID p_guid, LPCWSTR psz_desc,
1140 LPCWSTR psz_mod, LPVOID _p_item )
1141 {
1142 VLC_UNUSED( psz_mod ); VLC_UNUSED( p_guid );
1143
1144 module_config_t *p_item = (module_config_t *) _p_item;
1145
1146 p_item->ppsz_list[p_item->i_list] = FromWide( psz_desc );
1147 p_item->ppsz_list_text[p_item->i_list] = FromWide( psz_desc );
1148 p_item->i_list++;
1149 return true;
1150 }
1151
1152 /*****************************************************************************
1153 * ReloadDirectXDevices: store the list of devices in preferences
1154 *****************************************************************************/
1155 static int ReloadDirectXDevices( vlc_object_t *p_this, char const *psz_name,
1156 vlc_value_t newval, vlc_value_t oldval, void *data )
1157 {
1158 VLC_UNUSED( newval ); VLC_UNUSED( oldval ); VLC_UNUSED( data );
1159
1160 module_config_t *p_item = config_FindConfig( p_this, psz_name );
1161 if( !p_item ) return VLC_SUCCESS;
1162
1163 /* Clear-up the current list */
1164 if( p_item->i_list )
1165 {
1166 for( int i = 0; i < p_item->i_list; i++ )
1167 {
1168 free((char *)(p_item->ppsz_list[i]) );
1169 free((char *)(p_item->ppsz_list_text[i]) );
1170 }
1171 }
1172
1173 HRESULT (WINAPI *OurDirectSoundEnumerate)(LPDSENUMCALLBACKW, LPVOID);
1174
1175 HANDLE hdsound_dll = LoadLibrary("DSOUND.DLL");
1176 if( hdsound_dll == NULL )
1177 {
1178 msg_Warn( p_this, "cannot open DSOUND.DLL" );
1179 return VLC_SUCCESS;
1180 }
1181
1182 /* Get DirectSoundEnumerate */
1183 OurDirectSoundEnumerate = (void *)
1184 GetProcAddress( hdsound_dll, "DirectSoundEnumerateW" );
1185
1186 if( OurDirectSoundEnumerate == NULL )
1187 goto error;
1188
1189 int nb_devices = 0;
1190 OurDirectSoundEnumerate(CallBackConfigNBEnum, &nb_devices);
1191 msg_Dbg(p_this,"found %d devices", nb_devices);
1192
1193 p_item->ppsz_list = xrealloc( p_item->ppsz_list,
1194 nb_devices * sizeof(char *) );
1195 p_item->ppsz_list_text = xrealloc( p_item->ppsz_list_text,
1196 nb_devices * sizeof(char *) );
1197
1198 p_item->i_list = 0;
1199 OurDirectSoundEnumerate(CallBackConfigEnum, p_item);
1200
1201 /* Signal change to the interface */
1202 p_item->b_dirty = true;
1203
1204 error:
1205 FreeLibrary(hdsound_dll);
1206
1207 return VLC_SUCCESS;
1208 }
1209