1 /*****************************************************************************
2 * waveout.c : Windows waveOut plugin for vlc
3 *****************************************************************************
4 * Copyright (C) 2001 VideoLAN
5 * $Id: waveout.c,v 1.27 2004/01/25 17:32:29 murray Exp $
7 * Authors: Gildas Bazin <gbazin@netcourrier.com>
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;
96 DEFINE_GUID( __KSDATAFORMAT_SUBTYPE_IEEE_FLOAT, WAVE_FORMAT_IEEE_FLOAT, 0x0000, 0x0010, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 );
97 DEFINE_GUID( __KSDATAFORMAT_SUBTYPE_PCM, WAVE_FORMAT_PCM, 0x0000, 0x0010, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 );
98 DEFINE_GUID( __KSDATAFORMAT_SUBTYPE_DOLBY_AC3_SPDIF, WAVE_FORMAT_DOLBY_AC3_SPDIF, 0x0000, 0x0010, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 );
100 /*****************************************************************************
102 *****************************************************************************/
103 static int Open ( vlc_object_t * );
104 static void Close ( vlc_object_t * );
105 static void Play ( aout_instance_t * );
107 /*****************************************************************************
108 * notification_thread_t: waveOut event thread
109 *****************************************************************************/
110 typedef struct notification_thread_t
113 aout_instance_t *p_aout;
115 } notification_thread_t;
117 /* local functions */
118 static void Probe ( aout_instance_t * );
119 static int OpenWaveOut ( aout_instance_t *, int, int, int, int, vlc_bool_t );
120 static int OpenWaveOutPCM( aout_instance_t *, int*, int, int, int, vlc_bool_t );
121 static void CheckReordering( aout_instance_t *, int );
122 static int PlayWaveOut ( aout_instance_t *, HWAVEOUT, WAVEHDR *,
125 static void CALLBACK WaveOutCallback ( HWAVEOUT, UINT, DWORD, DWORD, DWORD );
126 static void WaveOutThread( notification_thread_t * );
128 static void InterleaveFloat32( float *, int *, int );
129 static void InterleaveS16( int16_t *, int *, int );
131 /*****************************************************************************
133 *****************************************************************************/
135 set_description( _("Win32 waveOut Extension Output") );
136 set_capability( "audio output", 50 );
137 set_callbacks( Open, Close );
140 /*****************************************************************************
141 * aout_sys_t: waveOut audio output method descriptor
142 *****************************************************************************
143 * This structure is part of the audio output thread descriptor.
144 * It describes the waveOut specific properties of an audio device.
145 *****************************************************************************/
148 HWAVEOUT h_waveout; /* handle to waveout instance */
150 WAVEFORMATEXTENSIBLE waveformat; /* audio format */
152 WAVEHDR waveheader[FRAMES_NUM];
154 notification_thread_t *p_notif; /* WaveOutThread id */
159 byte_t *p_silence_buffer; /* buffer we use to play silence */
161 vlc_bool_t b_chan_reorder; /* do we need channel reordering */
165 static const uint32_t pi_channels_in[] =
166 { AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT,
167 AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT,
168 AOUT_CHAN_CENTER, AOUT_CHAN_LFE };
169 static const uint32_t pi_channels_out[] =
170 { SPEAKER_FRONT_LEFT, SPEAKER_FRONT_RIGHT,
171 SPEAKER_BACK_LEFT, SPEAKER_BACK_RIGHT,
172 SPEAKER_FRONT_CENTER, SPEAKER_LOW_FREQUENCY };
173 static const uint32_t pi_channels_ordered[] =
174 { SPEAKER_FRONT_LEFT, SPEAKER_FRONT_RIGHT, SPEAKER_FRONT_CENTER,
175 SPEAKER_LOW_FREQUENCY,
176 SPEAKER_BACK_LEFT, SPEAKER_BACK_RIGHT };
178 /*****************************************************************************
179 * Open: open the audio device
180 *****************************************************************************
181 * This function opens and setups Win32 waveOut
182 *****************************************************************************/
183 static int Open( vlc_object_t *p_this )
185 aout_instance_t *p_aout = (aout_instance_t *)p_this;
189 /* Allocate structure */
190 p_aout->output.p_sys = malloc( sizeof( aout_sys_t ) );
192 if( p_aout->output.p_sys == NULL )
194 msg_Err( p_aout, "out of memory" );
198 p_aout->output.pf_play = Play;
199 p_aout->output.p_sys->pi_chan_table = NULL;
200 p_aout->b_die = VLC_FALSE;
202 if( var_Type( p_aout, "audio-device" ) == 0 )
207 if( var_Get( p_aout, "audio-device", &val ) < 0 )
209 /* Probe() has failed. */
210 free( p_aout->output.p_sys );
214 /* Open the device */
215 if( val.i_int == AOUT_VAR_SPDIF )
217 p_aout->output.output.i_format = VLC_FOURCC('s','p','d','i');
219 if( OpenWaveOut( p_aout, VLC_FOURCC('s','p','d','i'),
220 p_aout->output.output.i_physical_channels,
221 aout_FormatNbChannels( &p_aout->output.output ),
222 p_aout->output.output.i_rate, VLC_FALSE )
225 msg_Err( p_aout, "cannot open waveout audio device" );
226 free( p_aout->output.p_sys );
230 /* Calculate the frame size in bytes */
231 p_aout->output.i_nb_samples = A52_FRAME_NB;
232 p_aout->output.output.i_bytes_per_frame = AOUT_SPDIF_SIZE;
233 p_aout->output.output.i_frame_length = A52_FRAME_NB;
234 p_aout->output.p_sys->i_buffer_size =
235 p_aout->output.output.i_bytes_per_frame;
237 aout_VolumeNoneInit( p_aout );
241 if( val.i_int == AOUT_VAR_5_1 )
243 p_aout->output.output.i_physical_channels
244 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
245 | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT
248 else if( val.i_int == AOUT_VAR_2F2R )
250 p_aout->output.output.i_physical_channels
251 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT
252 | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
254 else if( val.i_int == AOUT_VAR_MONO )
256 p_aout->output.output.i_physical_channels = AOUT_CHAN_CENTER;
260 p_aout->output.output.i_physical_channels
261 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
264 if( OpenWaveOutPCM( p_aout, &p_aout->output.output.i_format,
265 p_aout->output.output.i_physical_channels,
266 aout_FormatNbChannels( &p_aout->output.output ),
267 p_aout->output.output.i_rate, VLC_FALSE )
270 msg_Err( p_aout, "cannot open waveout audio device" );
271 free( p_aout->output.p_sys );
275 /* Calculate the frame size in bytes */
276 p_aout->output.i_nb_samples = FRAME_SIZE;
277 aout_FormatPrepare( &p_aout->output.output );
278 p_aout->output.p_sys->i_buffer_size = FRAME_SIZE *
279 p_aout->output.output.i_bytes_per_frame;
281 aout_VolumeSoftInit( p_aout );
285 waveOutReset( p_aout->output.p_sys->h_waveout );
287 /* Allocate silence buffer */
288 p_aout->output.p_sys->p_silence_buffer =
289 malloc( p_aout->output.p_sys->i_buffer_size );
290 if( p_aout->output.p_sys->p_silence_buffer == NULL )
292 free( p_aout->output.p_sys );
293 msg_Err( p_aout, "out of memory" );
297 /* Zero the buffer. WinCE doesn't have calloc(). */
298 memset( p_aout->output.p_sys->p_silence_buffer, 0,
299 p_aout->output.p_sys->i_buffer_size );
301 /* Now we need to setup our waveOut play notification structure */
302 p_aout->output.p_sys->p_notif =
303 vlc_object_create( p_aout, sizeof(notification_thread_t) );
304 p_aout->output.p_sys->p_notif->p_aout = p_aout;
305 p_aout->output.p_sys->event = CreateEvent( NULL, FALSE, FALSE, NULL );
307 /* Then launch the notification thread */
308 if( vlc_thread_create( p_aout->output.p_sys->p_notif,
309 "waveOut Notification Thread", WaveOutThread,
310 VLC_THREAD_PRIORITY_HIGHEST, VLC_FALSE ) )
312 msg_Err( p_aout, "cannot create WaveOutThread" );
315 /* We need to kick off the playback in order to have the callback properly
317 for( i = 0; i < FRAMES_NUM; i++ )
319 p_aout->output.p_sys->waveheader[i].dwFlags = WHDR_DONE;
321 PlayWaveOut( p_aout, p_aout->output.p_sys->h_waveout,
322 &p_aout->output.p_sys->waveheader[0], NULL );
327 /*****************************************************************************
328 * Probe: probe the audio device for available formats and channels
329 *****************************************************************************/
330 static void Probe( aout_instance_t * p_aout )
332 vlc_value_t val, text;
334 unsigned int i_physical_channels;
336 var_Create( p_aout, "audio-device", VLC_VAR_INTEGER | VLC_VAR_HASCHOICE );
337 text.psz_string = _("Audio Device");
338 var_Change( p_aout, "audio-device", VLC_VAR_SETTEXT, &text, NULL );
340 /* Test for 5.1 support */
341 i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
342 AOUT_CHAN_CENTER | AOUT_CHAN_REARLEFT |
343 AOUT_CHAN_REARRIGHT | AOUT_CHAN_LFE;
344 if( p_aout->output.output.i_physical_channels == i_physical_channels )
346 if( OpenWaveOutPCM( p_aout, &i_format,
347 i_physical_channels, 6,
348 p_aout->output.output.i_rate, VLC_TRUE )
351 val.i_int = AOUT_VAR_5_1;
352 text.psz_string = N_("5.1");
353 var_Change( p_aout, "audio-device",
354 VLC_VAR_ADDCHOICE, &val, &text );
355 msg_Dbg( p_aout, "device supports 5.1 channels" );
359 /* Test for 2 Front 2 Rear support */
360 i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
361 AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
362 if( ( p_aout->output.output.i_physical_channels & i_physical_channels )
363 == i_physical_channels )
365 if( OpenWaveOutPCM( p_aout, &i_format,
366 i_physical_channels, 4,
367 p_aout->output.output.i_rate, VLC_TRUE )
370 val.i_int = AOUT_VAR_2F2R;
371 text.psz_string = N_("2 Front 2 Rear");
372 var_Change( p_aout, "audio-device",
373 VLC_VAR_ADDCHOICE, &val, &text );
374 msg_Dbg( p_aout, "device supports 4 channels" );
378 /* Test for stereo support */
379 i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
380 if( OpenWaveOutPCM( p_aout, &i_format,
381 i_physical_channels, 2,
382 p_aout->output.output.i_rate, VLC_TRUE )
385 val.i_int = AOUT_VAR_STEREO;
386 text.psz_string = N_("Stereo");
387 var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
388 msg_Dbg( p_aout, "device supports 2 channels" );
391 /* Test for mono support */
392 i_physical_channels = AOUT_CHAN_CENTER;
393 if( OpenWaveOutPCM( p_aout, &i_format,
394 i_physical_channels, 1,
395 p_aout->output.output.i_rate, VLC_TRUE )
398 val.i_int = AOUT_VAR_MONO;
399 text.psz_string = N_("Mono");
400 var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
401 msg_Dbg( p_aout, "device supports 1 channel" );
404 /* Test for SPDIF support */
405 if ( AOUT_FMT_NON_LINEAR( &p_aout->output.output ) )
407 if( OpenWaveOut( p_aout, VLC_FOURCC('s','p','d','i'),
408 p_aout->output.output.i_physical_channels,
409 aout_FormatNbChannels( &p_aout->output.output ),
410 p_aout->output.output.i_rate, VLC_TRUE )
413 msg_Dbg( p_aout, "device supports A/52 over S/PDIF" );
414 val.i_int = AOUT_VAR_SPDIF;
415 text.psz_string = N_("A/52 over S/PDIF");
416 var_Change( p_aout, "audio-device",
417 VLC_VAR_ADDCHOICE, &val, &text );
418 if( config_GetInt( p_aout, "spdif" ) )
419 var_Set( p_aout, "audio-device", val );
423 var_Change( p_aout, "audio-device", VLC_VAR_CHOICESCOUNT, &val, NULL );
426 /* Probe() has failed. */
427 var_Destroy( p_aout, "audio-device" );
431 var_AddCallback( p_aout, "audio-device", aout_ChannelsRestart, NULL );
433 val.b_bool = VLC_TRUE;
434 var_Set( p_aout, "intf-change", val );
437 /*****************************************************************************
438 * Play: play a sound buffer
439 *****************************************************************************
440 * This doesn't actually play the buffer. This just stores the buffer so it
441 * can be played by the callback thread.
442 *****************************************************************************/
443 static void Play( aout_instance_t *_p_aout )
447 /*****************************************************************************
448 * Close: close the audio device
449 *****************************************************************************/
450 static void Close( vlc_object_t *p_this )
452 aout_instance_t *p_aout = (aout_instance_t *)p_this;
454 /* Before calling waveOutClose we must reset the device */
455 p_aout->b_die = VLC_TRUE;
457 /* wake up the audio thread */
458 SetEvent( p_aout->output.p_sys->event );
459 vlc_thread_join( p_aout->output.p_sys->p_notif );
460 CloseHandle( p_aout->output.p_sys->event );
462 /* Wait for the waveout buffers to be freed */
466 vlc_bool_t b_not_done = VLC_FALSE;
468 for( i = 0; i < FRAMES_NUM; i++ )
470 if( !(p_aout->output.p_sys->waveheader[i].dwFlags & WHDR_DONE) )
471 b_not_done = VLC_TRUE;
480 waveOutReset( p_aout->output.p_sys->h_waveout );
482 /* Close the device */
483 if( waveOutClose( p_aout->output.p_sys->h_waveout ) != MMSYSERR_NOERROR )
485 msg_Err( p_aout, "waveOutClose failed" );
488 free( p_aout->output.p_sys->p_silence_buffer );
489 if( p_aout->output.p_sys->pi_chan_table )
490 free( p_aout->output.p_sys->pi_chan_table );
491 free( p_aout->output.p_sys );
494 /*****************************************************************************
495 * OpenWaveOut: open the waveout sound device
496 ****************************************************************************/
497 static int OpenWaveOut( aout_instance_t *p_aout, int i_format,
498 int i_channels, int i_nb_channels, int i_rate,
504 /* Set sound format */
506 #define waveformat p_aout->output.p_sys->waveformat
508 waveformat.dwChannelMask = 0;
509 for( i = 0; i < sizeof(pi_channels_in)/sizeof(uint32_t); i++ )
511 if( i_channels & pi_channels_in[i] )
512 waveformat.dwChannelMask |= pi_channels_out[i];
517 case VLC_FOURCC('s','p','d','i'):
519 /* To prevent channel re-ordering */
520 waveformat.dwChannelMask = SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT;
521 waveformat.Format.wBitsPerSample = 16;
522 waveformat.Samples.wValidBitsPerSample =
523 waveformat.Format.wBitsPerSample;
524 waveformat.Format.wFormatTag = WAVE_FORMAT_DOLBY_AC3_SPDIF;
525 waveformat.SubFormat = __KSDATAFORMAT_SUBTYPE_DOLBY_AC3_SPDIF;
528 case VLC_FOURCC('f','l','3','2'):
529 waveformat.Format.wBitsPerSample = sizeof(float) * 8;
530 waveformat.Samples.wValidBitsPerSample =
531 waveformat.Format.wBitsPerSample;
532 waveformat.Format.wFormatTag = WAVE_FORMAT_IEEE_FLOAT;
533 waveformat.SubFormat = __KSDATAFORMAT_SUBTYPE_IEEE_FLOAT;
536 case VLC_FOURCC('s','1','6','l'):
537 waveformat.Format.wBitsPerSample = 16;
538 waveformat.Samples.wValidBitsPerSample =
539 waveformat.Format.wBitsPerSample;
540 waveformat.Format.wFormatTag = WAVE_FORMAT_PCM;
541 waveformat.SubFormat = __KSDATAFORMAT_SUBTYPE_PCM;
545 waveformat.Format.nChannels = i_nb_channels;
546 waveformat.Format.nSamplesPerSec = i_rate;
547 waveformat.Format.nBlockAlign =
548 waveformat.Format.wBitsPerSample / 8 * i_nb_channels;
549 waveformat.Format.nAvgBytesPerSec =
550 waveformat.Format.nSamplesPerSec * waveformat.Format.nBlockAlign;
552 /* Only use the new WAVE_FORMAT_EXTENSIBLE format for multichannel audio */
553 if( i_nb_channels <= 2 )
555 waveformat.Format.cbSize = 0;
559 waveformat.Format.wFormatTag = WAVE_FORMAT_EXTENSIBLE;
560 waveformat.Format.cbSize =
561 sizeof(WAVEFORMATEXTENSIBLE) - sizeof(WAVEFORMATEX);
564 /* Open the device */
565 result = waveOutOpen( &p_aout->output.p_sys->h_waveout, WAVE_MAPPER,
566 (WAVEFORMATEX *)&waveformat,
567 (DWORD_PTR)WaveOutCallback, (DWORD_PTR)p_aout,
568 CALLBACK_FUNCTION | (b_probe?WAVE_FORMAT_QUERY:0) );
569 if( result == WAVERR_BADFORMAT )
571 msg_Warn( p_aout, "waveOutOpen failed WAVERR_BADFORMAT" );
574 if( result == MMSYSERR_ALLOCATED )
576 msg_Warn( p_aout, "waveOutOpen failed WAVERR_ALLOCATED" );
579 if( result != MMSYSERR_NOERROR )
581 msg_Warn( p_aout, "waveOutOpen failed" );
585 CheckReordering( p_aout, i_nb_channels );
593 /*****************************************************************************
594 * OpenWaveOutPCM: open a PCM waveout sound device
595 ****************************************************************************/
596 static int OpenWaveOutPCM( aout_instance_t *p_aout, int *i_format,
597 int i_channels, int i_nb_channels, int i_rate,
600 if( 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 * CheckReordering: Check if we need to do some channel re-ordering (the ac3
625 * channel order is different from the one chosen by
627 *****************************************************************************/
628 static void CheckReordering( aout_instance_t *p_aout, int i_nb_channels )
632 #define waveformat p_aout->output.p_sys->waveformat
633 #define pi_chan_table p_aout->output.p_sys->pi_chan_table
635 p_aout->output.p_sys->b_chan_reorder = VLC_FALSE;
637 pi_chan_table = malloc( i_nb_channels * sizeof(int) );
644 i < (int)(sizeof(pi_channels_out)/sizeof(uint32_t)); i++ )
646 if( waveformat.dwChannelMask & pi_channels_out[i] )
649 pi_channels_out[i] != pi_channels_ordered[k]; k++ )
651 if( waveformat.dwChannelMask & pi_channels_ordered[k] )
657 pi_chan_table[j] = l;
663 for( i = 0; i < i_nb_channels; i++ )
665 if( pi_chan_table[i] != i )
667 p_aout->output.p_sys->b_chan_reorder = VLC_TRUE;
671 if( p_aout->output.p_sys->b_chan_reorder )
673 msg_Dbg( p_aout, "channel reordering needed" );
680 /*****************************************************************************
681 * PlayWaveOut: play a buffer through the WaveOut device
682 *****************************************************************************/
683 static int PlayWaveOut( aout_instance_t *p_aout, HWAVEOUT h_waveout,
684 WAVEHDR *p_waveheader, aout_buffer_t *p_buffer )
688 /* Prepare the buffer */
689 if( p_buffer != NULL )
690 p_waveheader->lpData = p_buffer->p_buffer;
692 /* Use silence buffer instead */
693 p_waveheader->lpData = p_aout->output.p_sys->p_silence_buffer;
695 p_waveheader->dwUser = (DWORD_PTR)p_buffer;
696 p_waveheader->dwBufferLength = p_aout->output.p_sys->i_buffer_size;
697 p_waveheader->dwFlags = 0;
699 result = waveOutPrepareHeader( h_waveout, p_waveheader, sizeof(WAVEHDR) );
700 if( result != MMSYSERR_NOERROR )
702 msg_Err( p_aout, "waveOutPrepareHeader failed" );
706 /* Send the buffer to the waveOut queue */
707 result = waveOutWrite( h_waveout, p_waveheader, sizeof(WAVEHDR) );
708 if( result != MMSYSERR_NOERROR )
710 msg_Err( p_aout, "waveOutWrite failed" );
717 /*****************************************************************************
718 * WaveOutCallback: what to do once WaveOut has played its sound samples
719 *****************************************************************************/
720 static void CALLBACK WaveOutCallback( HWAVEOUT h_waveout, UINT uMsg,
722 DWORD dwParam1, DWORD dwParam2 )
724 aout_instance_t *p_aout = (aout_instance_t *)_p_aout;
725 WAVEHDR *p_waveheader = (WAVEHDR *)dwParam1;
726 int i, i_queued_frames = 0;
728 if( uMsg != WOM_DONE ) return;
730 /* Unprepare and free the buffer which has just been played */
731 waveOutUnprepareHeader( h_waveout, p_waveheader, sizeof(WAVEHDR) );
732 if( p_waveheader->dwUser )
733 aout_BufferFree( (aout_buffer_t *)p_waveheader->dwUser );
735 if( p_aout->b_die ) return;
737 /* Find out the current latency */
738 for( i = 0; i < FRAMES_NUM; i++ )
740 /* Check if frame buf is available */
741 if( !(p_aout->output.p_sys->waveheader[i].dwFlags & WHDR_DONE) )
747 /* Don't wake up the thread too much */
748 if( i_queued_frames < FRAMES_NUM / 2 )
749 SetEvent( p_aout->output.p_sys->event );
752 /*****************************************************************************
753 * InterleaveFloat32/S16: change the channel order to the Microsoft one.
754 *****************************************************************************/
755 static void InterleaveFloat32( float *p_buf, int *pi_chan_table,
761 for( i = 0; i < FRAME_SIZE; i++ )
763 for( j = 0; j < i_nb_channels; j++ )
765 p_tmp[pi_chan_table[j]] = p_buf[i*i_nb_channels + j];
768 memcpy( &p_buf[i*i_nb_channels], p_tmp,
769 i_nb_channels * sizeof(float) );
773 static void InterleaveS16( int16_t *p_buf, int *pi_chan_table,
779 for( i = 0; i < FRAME_SIZE; i++ )
781 for( j = 0; j < i_nb_channels; j++ )
783 p_tmp[pi_chan_table[j]] = p_buf[i*i_nb_channels + j];
786 memcpy( &p_buf[i*i_nb_channels], p_tmp,
787 i_nb_channels * sizeof(int16_t) );
791 /*****************************************************************************
792 * WaveOutThread: this thread will capture play notification events.
793 *****************************************************************************
794 * We use this thread to feed new audio samples to the sound card because
795 * we are not authorized to use waveOutWrite() directly in the waveout
797 *****************************************************************************/
798 static void WaveOutThread( notification_thread_t *p_notif )
800 aout_instance_t *p_aout = p_notif->p_aout;
801 aout_buffer_t *p_buffer = NULL;
803 int i, i_queued_frames;
805 /* We don't want any resampling when using S/PDIF */
806 b_sleek = p_aout->output.output.i_format == VLC_FOURCC('s','p','d','i');
810 WaitForSingleObject( p_aout->output.p_sys->event, INFINITE );
811 if( p_aout->b_die ) return;
813 /* Find out the current latency */
815 for( i = 0; i < FRAMES_NUM; i++ )
817 /* Check if frame buf is available */
818 if( !(p_aout->output.p_sys->waveheader[i].dwFlags & WHDR_DONE) )
824 /* Try to fill in as many frame buffers as possible */
825 for( i = 0; i < FRAMES_NUM; i++ )
827 /* Check if frame buf is available */
828 if( p_aout->output.p_sys->waveheader[i].dwFlags & WHDR_DONE )
830 /* Take into account the latency */
831 p_buffer = aout_OutputNextBuffer( p_aout,
832 mdate() + 1000000 * i_queued_frames /
833 p_aout->output.output.i_rate * p_aout->output.i_nb_samples,
836 if( !p_buffer && i_queued_frames )
838 /* We aren't late so no need to play a blank sample */
842 /* Do the channel reordering here */
843 if( p_buffer && p_aout->output.p_sys->b_chan_reorder )
845 if( p_aout->output.output.i_format ==
846 VLC_FOURCC('s','1','6','l') )
847 InterleaveS16( (int16_t *)p_buffer->p_buffer,
848 p_aout->output.p_sys->pi_chan_table,
849 aout_FormatNbChannels( &p_aout->output.output ) );
851 InterleaveFloat32( (float *)p_buffer->p_buffer,
852 p_aout->output.p_sys->pi_chan_table,
853 aout_FormatNbChannels( &p_aout->output.output ) );
856 PlayWaveOut( p_aout, p_aout->output.p_sys->h_waveout,
857 &p_aout->output.p_sys->waveheader[i] , p_buffer );