1 /*****************************************************************************
2 * waveout.c : Windows waveOut plugin for vlc
3 *****************************************************************************
4 * Copyright (C) 2001 VideoLAN
7 * Authors: Gildas Bazin <gbazin@videolan.org>
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.
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.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
27 #include <string.h> /* strerror() */
28 #include <stdlib.h> /* calloc(), malloc(), free() */
32 #include "aout_internal.h"
37 #define FRAME_SIZE 1024 /* The size is in samples, not in bytes */
40 /*****************************************************************************
42 *****************************************************************************/
44 # define DWORD_PTR DWORD
47 #ifndef WAVE_FORMAT_IEEE_FLOAT
48 # define WAVE_FORMAT_IEEE_FLOAT 0x0003
51 #ifndef WAVE_FORMAT_DOLBY_AC3_SPDIF
52 # define WAVE_FORMAT_DOLBY_AC3_SPDIF 0x0092
55 #ifndef WAVE_FORMAT_EXTENSIBLE
56 #define WAVE_FORMAT_EXTENSIBLE 0xFFFE
59 #ifndef SPEAKER_FRONT_LEFT
60 # define SPEAKER_FRONT_LEFT 0x1
61 # define SPEAKER_FRONT_RIGHT 0x2
62 # define SPEAKER_FRONT_CENTER 0x4
63 # define SPEAKER_LOW_FREQUENCY 0x8
64 # define SPEAKER_BACK_LEFT 0x10
65 # define SPEAKER_BACK_RIGHT 0x20
66 # define SPEAKER_FRONT_LEFT_OF_CENTER 0x40
67 # define SPEAKER_FRONT_RIGHT_OF_CENTER 0x80
68 # define SPEAKER_BACK_CENTER 0x100
69 # define SPEAKER_SIDE_LEFT 0x200
70 # define SPEAKER_SIDE_RIGHT 0x400
71 # define SPEAKER_TOP_CENTER 0x800
72 # define SPEAKER_TOP_FRONT_LEFT 0x1000
73 # define SPEAKER_TOP_FRONT_CENTER 0x2000
74 # define SPEAKER_TOP_FRONT_RIGHT 0x4000
75 # define SPEAKER_TOP_BACK_LEFT 0x8000
76 # define SPEAKER_TOP_BACK_CENTER 0x10000
77 # define SPEAKER_TOP_BACK_RIGHT 0x20000
78 # define SPEAKER_RESERVED 0x80000000
81 #ifndef _WAVEFORMATEXTENSIBLE_
85 WORD wValidBitsPerSample; /* bits of precision */
86 WORD wSamplesPerBlock; /* valid if wBitsPerSample==0 */
87 WORD wReserved; /* If neither applies, set to zero. */
89 DWORD dwChannelMask; /* which channels are */
90 /* present in stream */
92 } WAVEFORMATEXTENSIBLE, *PWAVEFORMATEXTENSIBLE;
95 static const GUID __KSDATAFORMAT_SUBTYPE_IEEE_FLOAT = {WAVE_FORMAT_IEEE_FLOAT, 0x0000, 0x0010, {0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}};
96 static const GUID __KSDATAFORMAT_SUBTYPE_PCM = {WAVE_FORMAT_PCM, 0x0000, 0x0010, {0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}};
97 static const GUID __KSDATAFORMAT_SUBTYPE_DOLBY_AC3_SPDIF = {WAVE_FORMAT_DOLBY_AC3_SPDIF, 0x0000, 0x0010, {0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}};
99 /*****************************************************************************
101 *****************************************************************************/
102 static int Open ( vlc_object_t * );
103 static void Close ( vlc_object_t * );
104 static void Play ( aout_instance_t * );
106 /*****************************************************************************
107 * notification_thread_t: waveOut event thread
108 *****************************************************************************/
109 typedef struct notification_thread_t
112 aout_instance_t *p_aout;
114 } notification_thread_t;
116 /* local functions */
117 static void Probe ( aout_instance_t * );
118 static int OpenWaveOut ( aout_instance_t *, int, int, int, int, vlc_bool_t );
119 static int OpenWaveOutPCM( aout_instance_t *, int*, int, int, int, vlc_bool_t );
120 static int PlayWaveOut ( aout_instance_t *, HWAVEOUT, WAVEHDR *,
123 static void CALLBACK WaveOutCallback ( HWAVEOUT, UINT, DWORD, DWORD, DWORD );
124 static void WaveOutThread( notification_thread_t * );
126 /*****************************************************************************
128 *****************************************************************************/
129 #define FLOAT_TEXT N_("Use float32 output")
130 #define FLOAT_LONGTEXT N_( \
131 "The option allows you to enable or disable the high-quality float32 " \
132 "audio output mode (which is not well supported by some soundcards)." )
135 set_description( _("Win32 waveOut extension output") );
136 set_capability( "audio output", 50 );
137 add_bool( "waveout-float32", 1, 0, FLOAT_TEXT, FLOAT_LONGTEXT, VLC_TRUE );
138 set_callbacks( Open, Close );
141 /*****************************************************************************
142 * aout_sys_t: waveOut audio output method descriptor
143 *****************************************************************************
144 * This structure is part of the audio output thread descriptor.
145 * It describes the waveOut specific properties of an audio device.
146 *****************************************************************************/
149 HWAVEOUT h_waveout; /* handle to waveout instance */
151 WAVEFORMATEXTENSIBLE waveformat; /* audio format */
153 WAVEHDR waveheader[FRAMES_NUM];
155 notification_thread_t *p_notif; /* WaveOutThread id */
160 byte_t *p_silence_buffer; /* buffer we use to play silence */
162 vlc_bool_t b_chan_reorder; /* do we need channel reordering */
163 int pi_chan_table[AOUT_CHAN_MAX];
166 static const uint32_t pi_channels_src[] =
167 { AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT,
168 AOUT_CHAN_MIDDLELEFT, AOUT_CHAN_MIDDLERIGHT,
169 AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT,
170 AOUT_CHAN_CENTER, AOUT_CHAN_LFE, 0 };
171 static const uint32_t pi_channels_in[] =
172 { SPEAKER_FRONT_LEFT, SPEAKER_FRONT_RIGHT,
173 SPEAKER_SIDE_LEFT, SPEAKER_SIDE_RIGHT,
174 SPEAKER_BACK_LEFT, SPEAKER_BACK_RIGHT,
175 SPEAKER_FRONT_CENTER, SPEAKER_LOW_FREQUENCY, 0 };
176 static const uint32_t pi_channels_out[] =
177 { SPEAKER_FRONT_LEFT, SPEAKER_FRONT_RIGHT,
178 SPEAKER_FRONT_CENTER, SPEAKER_LOW_FREQUENCY,
179 SPEAKER_BACK_LEFT, SPEAKER_BACK_RIGHT,
180 SPEAKER_SIDE_LEFT, SPEAKER_SIDE_RIGHT, 0 };
182 /*****************************************************************************
183 * Open: open the audio device
184 *****************************************************************************
185 * This function opens and setups Win32 waveOut
186 *****************************************************************************/
187 static int Open( vlc_object_t *p_this )
189 aout_instance_t *p_aout = (aout_instance_t *)p_this;
193 /* Allocate structure */
194 p_aout->output.p_sys = malloc( sizeof( aout_sys_t ) );
196 if( p_aout->output.p_sys == NULL )
198 msg_Err( p_aout, "out of memory" );
202 p_aout->output.pf_play = Play;
203 p_aout->b_die = VLC_FALSE;
205 if( var_Type( p_aout, "audio-device" ) == 0 )
210 if( var_Get( p_aout, "audio-device", &val ) < 0 )
212 /* Probe() has failed. */
213 free( p_aout->output.p_sys );
217 var_Create( p_aout, "waveout-float32", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
219 /* Open the device */
220 if( val.i_int == AOUT_VAR_SPDIF )
222 p_aout->output.output.i_format = VLC_FOURCC('s','p','d','i');
224 if( OpenWaveOut( p_aout, VLC_FOURCC('s','p','d','i'),
225 p_aout->output.output.i_physical_channels,
226 aout_FormatNbChannels( &p_aout->output.output ),
227 p_aout->output.output.i_rate, VLC_FALSE )
230 msg_Err( p_aout, "cannot open waveout audio device" );
231 free( p_aout->output.p_sys );
235 /* Calculate the frame size in bytes */
236 p_aout->output.i_nb_samples = A52_FRAME_NB;
237 p_aout->output.output.i_bytes_per_frame = AOUT_SPDIF_SIZE;
238 p_aout->output.output.i_frame_length = A52_FRAME_NB;
239 p_aout->output.p_sys->i_buffer_size =
240 p_aout->output.output.i_bytes_per_frame;
242 aout_VolumeNoneInit( p_aout );
246 if( val.i_int == AOUT_VAR_5_1 )
248 p_aout->output.output.i_physical_channels
249 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
250 | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT
253 else if( val.i_int == AOUT_VAR_2F2R )
255 p_aout->output.output.i_physical_channels
256 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT
257 | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
259 else if( val.i_int == AOUT_VAR_MONO )
261 p_aout->output.output.i_physical_channels = AOUT_CHAN_CENTER;
265 p_aout->output.output.i_physical_channels
266 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
269 if( OpenWaveOutPCM( p_aout, &p_aout->output.output.i_format,
270 p_aout->output.output.i_physical_channels,
271 aout_FormatNbChannels( &p_aout->output.output ),
272 p_aout->output.output.i_rate, VLC_FALSE )
275 msg_Err( p_aout, "cannot open waveout audio device" );
276 free( p_aout->output.p_sys );
280 /* Calculate the frame size in bytes */
281 p_aout->output.i_nb_samples = FRAME_SIZE;
282 aout_FormatPrepare( &p_aout->output.output );
283 p_aout->output.p_sys->i_buffer_size = FRAME_SIZE *
284 p_aout->output.output.i_bytes_per_frame;
286 aout_VolumeSoftInit( p_aout );
290 waveOutReset( p_aout->output.p_sys->h_waveout );
292 /* Allocate silence buffer */
293 p_aout->output.p_sys->p_silence_buffer =
294 malloc( p_aout->output.p_sys->i_buffer_size );
295 if( p_aout->output.p_sys->p_silence_buffer == NULL )
297 free( p_aout->output.p_sys );
298 msg_Err( p_aout, "out of memory" );
302 /* Zero the buffer. WinCE doesn't have calloc(). */
303 memset( p_aout->output.p_sys->p_silence_buffer, 0,
304 p_aout->output.p_sys->i_buffer_size );
306 /* Now we need to setup our waveOut 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 p_aout->output.p_sys->event = CreateEvent( NULL, FALSE, FALSE, NULL );
312 /* Then launch the notification thread */
313 if( vlc_thread_create( p_aout->output.p_sys->p_notif,
314 "waveOut Notification Thread", WaveOutThread,
315 VLC_THREAD_PRIORITY_HIGHEST, VLC_FALSE ) )
317 msg_Err( p_aout, "cannot create WaveOutThread" );
320 /* We need to kick off the playback in order to have the callback properly
322 for( i = 0; i < FRAMES_NUM; i++ )
324 p_aout->output.p_sys->waveheader[i].dwFlags = WHDR_DONE;
325 p_aout->output.p_sys->waveheader[i].dwUser = 0;
327 PlayWaveOut( p_aout, p_aout->output.p_sys->h_waveout,
328 &p_aout->output.p_sys->waveheader[0], NULL );
333 /*****************************************************************************
334 * Probe: probe the audio device for available formats and channels
335 *****************************************************************************/
336 static void Probe( aout_instance_t * p_aout )
338 vlc_value_t val, text;
340 unsigned int i_physical_channels;
342 var_Create( p_aout, "audio-device", VLC_VAR_INTEGER | VLC_VAR_HASCHOICE );
343 text.psz_string = _("Audio Device");
344 var_Change( p_aout, "audio-device", VLC_VAR_SETTEXT, &text, NULL );
346 /* Test for 5.1 support */
347 i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
348 AOUT_CHAN_CENTER | AOUT_CHAN_REARLEFT |
349 AOUT_CHAN_REARRIGHT | AOUT_CHAN_LFE;
350 if( p_aout->output.output.i_physical_channels == i_physical_channels )
352 if( OpenWaveOutPCM( p_aout, &i_format,
353 i_physical_channels, 6,
354 p_aout->output.output.i_rate, VLC_TRUE )
357 val.i_int = AOUT_VAR_5_1;
358 text.psz_string = N_("5.1");
359 var_Change( p_aout, "audio-device",
360 VLC_VAR_ADDCHOICE, &val, &text );
361 msg_Dbg( p_aout, "device supports 5.1 channels" );
365 /* Test for 2 Front 2 Rear support */
366 i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
367 AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
368 if( ( p_aout->output.output.i_physical_channels & i_physical_channels )
369 == i_physical_channels )
371 if( OpenWaveOutPCM( p_aout, &i_format,
372 i_physical_channels, 4,
373 p_aout->output.output.i_rate, VLC_TRUE )
376 val.i_int = AOUT_VAR_2F2R;
377 text.psz_string = N_("2 Front 2 Rear");
378 var_Change( p_aout, "audio-device",
379 VLC_VAR_ADDCHOICE, &val, &text );
380 msg_Dbg( p_aout, "device supports 4 channels" );
384 /* Test for stereo support */
385 i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
386 if( OpenWaveOutPCM( p_aout, &i_format,
387 i_physical_channels, 2,
388 p_aout->output.output.i_rate, VLC_TRUE )
391 val.i_int = AOUT_VAR_STEREO;
392 text.psz_string = N_("Stereo");
393 var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
394 msg_Dbg( p_aout, "device supports 2 channels" );
397 /* Test for mono support */
398 i_physical_channels = AOUT_CHAN_CENTER;
399 if( OpenWaveOutPCM( p_aout, &i_format,
400 i_physical_channels, 1,
401 p_aout->output.output.i_rate, VLC_TRUE )
404 val.i_int = AOUT_VAR_MONO;
405 text.psz_string = N_("Mono");
406 var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
407 msg_Dbg( p_aout, "device supports 1 channel" );
410 /* Test for SPDIF support */
411 if ( AOUT_FMT_NON_LINEAR( &p_aout->output.output ) )
413 if( OpenWaveOut( p_aout, VLC_FOURCC('s','p','d','i'),
414 p_aout->output.output.i_physical_channels,
415 aout_FormatNbChannels( &p_aout->output.output ),
416 p_aout->output.output.i_rate, VLC_TRUE )
419 msg_Dbg( p_aout, "device supports A/52 over S/PDIF" );
420 val.i_int = AOUT_VAR_SPDIF;
421 text.psz_string = N_("A/52 over S/PDIF");
422 var_Change( p_aout, "audio-device",
423 VLC_VAR_ADDCHOICE, &val, &text );
424 if( config_GetInt( p_aout, "spdif" ) )
425 var_Set( p_aout, "audio-device", val );
429 var_Change( p_aout, "audio-device", VLC_VAR_CHOICESCOUNT, &val, NULL );
432 /* Probe() has failed. */
433 var_Destroy( p_aout, "audio-device" );
437 var_AddCallback( p_aout, "audio-device", aout_ChannelsRestart, NULL );
439 val.b_bool = VLC_TRUE;
440 var_Set( p_aout, "intf-change", val );
443 /*****************************************************************************
444 * Play: play a sound buffer
445 *****************************************************************************
446 * This doesn't actually play the buffer. This just stores the buffer so it
447 * can be played by the callback thread.
448 *****************************************************************************/
449 static void Play( aout_instance_t *_p_aout )
453 /*****************************************************************************
454 * Close: close the audio device
455 *****************************************************************************/
456 static void Close( vlc_object_t *p_this )
458 aout_instance_t *p_aout = (aout_instance_t *)p_this;
459 aout_sys_t *p_sys = p_aout->output.p_sys;
461 /* Before calling waveOutClose we must reset the device */
462 p_aout->b_die = VLC_TRUE;
464 waveOutReset( p_sys->h_waveout );
466 /* wake up the audio thread */
467 SetEvent( p_sys->event );
468 vlc_thread_join( p_sys->p_notif );
469 vlc_object_destroy( p_sys->p_notif );
470 CloseHandle( p_sys->event );
472 /* Close the device */
473 if( waveOutClose( p_sys->h_waveout ) != MMSYSERR_NOERROR )
475 msg_Err( p_aout, "waveOutClose failed" );
478 free( p_sys->p_silence_buffer );
482 /*****************************************************************************
483 * OpenWaveOut: open the waveout sound device
484 ****************************************************************************/
485 static int OpenWaveOut( aout_instance_t *p_aout, int i_format,
486 int i_channels, int i_nb_channels, int i_rate,
492 /* Set sound format */
494 #define waveformat p_aout->output.p_sys->waveformat
496 waveformat.dwChannelMask = 0;
497 for( i = 0; i < sizeof(pi_channels_in)/sizeof(uint32_t); i++ )
499 if( i_channels & pi_channels_in[i] )
500 waveformat.dwChannelMask |= pi_channels_out[i];
505 case VLC_FOURCC('s','p','d','i'):
507 /* To prevent channel re-ordering */
508 waveformat.dwChannelMask = SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT;
509 waveformat.Format.wBitsPerSample = 16;
510 waveformat.Samples.wValidBitsPerSample =
511 waveformat.Format.wBitsPerSample;
512 waveformat.Format.wFormatTag = WAVE_FORMAT_DOLBY_AC3_SPDIF;
513 waveformat.SubFormat = __KSDATAFORMAT_SUBTYPE_DOLBY_AC3_SPDIF;
516 case VLC_FOURCC('f','l','3','2'):
517 waveformat.Format.wBitsPerSample = sizeof(float) * 8;
518 waveformat.Samples.wValidBitsPerSample =
519 waveformat.Format.wBitsPerSample;
520 waveformat.Format.wFormatTag = WAVE_FORMAT_IEEE_FLOAT;
521 waveformat.SubFormat = __KSDATAFORMAT_SUBTYPE_IEEE_FLOAT;
524 case VLC_FOURCC('s','1','6','l'):
525 waveformat.Format.wBitsPerSample = 16;
526 waveformat.Samples.wValidBitsPerSample =
527 waveformat.Format.wBitsPerSample;
528 waveformat.Format.wFormatTag = WAVE_FORMAT_PCM;
529 waveformat.SubFormat = __KSDATAFORMAT_SUBTYPE_PCM;
533 waveformat.Format.nChannels = i_nb_channels;
534 waveformat.Format.nSamplesPerSec = i_rate;
535 waveformat.Format.nBlockAlign =
536 waveformat.Format.wBitsPerSample / 8 * i_nb_channels;
537 waveformat.Format.nAvgBytesPerSec =
538 waveformat.Format.nSamplesPerSec * waveformat.Format.nBlockAlign;
540 /* Only use the new WAVE_FORMAT_EXTENSIBLE format for multichannel audio */
541 if( i_nb_channels <= 2 )
543 waveformat.Format.cbSize = 0;
547 waveformat.Format.wFormatTag = WAVE_FORMAT_EXTENSIBLE;
548 waveformat.Format.cbSize =
549 sizeof(WAVEFORMATEXTENSIBLE) - sizeof(WAVEFORMATEX);
552 /* Open the device */
553 result = waveOutOpen( &p_aout->output.p_sys->h_waveout, WAVE_MAPPER,
554 (WAVEFORMATEX *)&waveformat,
555 (DWORD_PTR)WaveOutCallback, (DWORD_PTR)p_aout,
556 CALLBACK_FUNCTION | (b_probe?WAVE_FORMAT_QUERY:0) );
557 if( result == WAVERR_BADFORMAT )
559 msg_Warn( p_aout, "waveOutOpen failed WAVERR_BADFORMAT" );
562 if( result == MMSYSERR_ALLOCATED )
564 msg_Warn( p_aout, "waveOutOpen failed WAVERR_ALLOCATED" );
567 if( result != MMSYSERR_NOERROR )
569 msg_Warn( p_aout, "waveOutOpen failed" );
573 p_aout->output.p_sys->b_chan_reorder =
574 aout_CheckChannelReorder( pi_channels_in, pi_channels_out,
575 waveformat.dwChannelMask, i_nb_channels,
576 p_aout->output.p_sys->pi_chan_table );
578 if( p_aout->output.p_sys->b_chan_reorder )
580 msg_Dbg( p_aout, "channel reordering needed" );
589 /*****************************************************************************
590 * OpenWaveOutPCM: open a PCM waveout sound device
591 ****************************************************************************/
592 static int OpenWaveOutPCM( aout_instance_t *p_aout, int *i_format,
593 int i_channels, int i_nb_channels, int i_rate,
598 var_Get( p_aout, "waveout-float32", &val );
600 if( !val.b_bool || OpenWaveOut( p_aout, VLC_FOURCC('f','l','3','2'),
601 i_channels, i_nb_channels, i_rate, b_probe )
604 if ( OpenWaveOut( p_aout, VLC_FOURCC('s','1','6','l'),
605 i_channels, i_nb_channels, i_rate, b_probe )
612 *i_format = VLC_FOURCC('s','1','6','l');
618 *i_format = VLC_FOURCC('f','l','3','2');
623 /*****************************************************************************
624 * PlayWaveOut: play a buffer through the WaveOut device
625 *****************************************************************************/
626 static int PlayWaveOut( aout_instance_t *p_aout, HWAVEOUT h_waveout,
627 WAVEHDR *p_waveheader, aout_buffer_t *p_buffer )
631 /* Prepare the buffer */
632 if( p_buffer != NULL )
633 p_waveheader->lpData = p_buffer->p_buffer;
635 /* Use silence buffer instead */
636 p_waveheader->lpData = p_aout->output.p_sys->p_silence_buffer;
638 p_waveheader->dwUser = p_buffer ? (DWORD_PTR)p_buffer : (DWORD_PTR)1;
639 p_waveheader->dwBufferLength = p_aout->output.p_sys->i_buffer_size;
640 p_waveheader->dwFlags = 0;
642 result = waveOutPrepareHeader( h_waveout, p_waveheader, sizeof(WAVEHDR) );
643 if( result != MMSYSERR_NOERROR )
645 msg_Err( p_aout, "waveOutPrepareHeader failed" );
649 /* Send the buffer to the waveOut queue */
650 result = waveOutWrite( h_waveout, p_waveheader, sizeof(WAVEHDR) );
651 if( result != MMSYSERR_NOERROR )
653 msg_Err( p_aout, "waveOutWrite failed" );
660 /*****************************************************************************
661 * WaveOutCallback: what to do once WaveOut has played its sound samples
662 *****************************************************************************/
663 static void CALLBACK WaveOutCallback( HWAVEOUT h_waveout, UINT uMsg,
665 DWORD dwParam1, DWORD dwParam2 )
667 aout_instance_t *p_aout = (aout_instance_t *)_p_aout;
668 int i, i_queued_frames = 0;
670 if( uMsg != WOM_DONE ) return;
672 if( p_aout->b_die ) return;
674 /* Find out the current latency */
675 for( i = 0; i < FRAMES_NUM; i++ )
677 /* Check if frame buf is available */
678 if( !(p_aout->output.p_sys->waveheader[i].dwFlags & WHDR_DONE) )
684 /* Don't wake up the thread too much */
685 if( i_queued_frames < FRAMES_NUM / 2 )
686 SetEvent( p_aout->output.p_sys->event );
689 /*****************************************************************************
690 * WaveOutThread: this thread will capture play notification events.
691 *****************************************************************************
692 * We use this thread to feed new audio samples to the sound card because
693 * we are not authorized to use waveOutWrite() directly in the waveout
695 *****************************************************************************/
696 static void WaveOutThread( notification_thread_t *p_notif )
698 aout_instance_t *p_aout = p_notif->p_aout;
699 aout_sys_t *p_sys = p_aout->output.p_sys;
700 aout_buffer_t *p_buffer = NULL;
701 WAVEHDR *p_waveheader = p_sys->waveheader;
702 int i, i_queued_frames;
705 /* We don't want any resampling when using S/PDIF */
706 b_sleek = p_aout->output.output.i_format == VLC_FOURCC('s','p','d','i');
710 WaitForSingleObject( p_sys->event, INFINITE );
712 /* Cleanup and find out the current latency */
714 for( i = 0; i < FRAMES_NUM; i++ )
716 if( (p_waveheader[i].dwFlags & WHDR_DONE) &&
717 p_waveheader[i].dwUser )
719 /* Unprepare and free the buffers which has just been played */
720 waveOutUnprepareHeader( p_sys->h_waveout, &p_waveheader[i],
723 if( p_waveheader[i].dwUser != 1 )
724 aout_BufferFree( (aout_buffer_t *)p_waveheader[i].dwUser );
726 p_waveheader[i].dwUser = 0;
729 /* Check if frame buf is available */
730 if( !(p_waveheader[i].dwFlags & WHDR_DONE) )
736 if( p_aout->b_die ) return;
738 /* Try to fill in as many frame buffers as possible */
739 for( i = 0; i < FRAMES_NUM; i++ )
741 /* Check if frame buf is available */
742 if( p_waveheader[i].dwFlags & WHDR_DONE )
744 /* Take into account the latency */
745 p_buffer = aout_OutputNextBuffer( p_aout,
746 mdate() + 1000000 * i_queued_frames /
747 p_aout->output.output.i_rate * p_aout->output.i_nb_samples,
750 if( !p_buffer && i_queued_frames )
752 /* We aren't late so no need to play a blank sample */
756 /* Do the channel reordering */
757 if( p_buffer && p_sys->b_chan_reorder )
759 aout_ChannelReorder( p_buffer->p_buffer,
760 p_buffer->i_nb_bytes,
761 p_sys->waveformat.Format.nChannels,
762 p_sys->pi_chan_table,
763 p_sys->waveformat.Format.wBitsPerSample );
766 PlayWaveOut( p_aout, p_sys->h_waveout,
767 &p_waveheader[i], p_buffer );