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 void CheckReordering( aout_instance_t *, int );
121 static int PlayWaveOut ( aout_instance_t *, HWAVEOUT, WAVEHDR *,
124 static void CALLBACK WaveOutCallback ( HWAVEOUT, UINT, DWORD, DWORD, DWORD );
125 static void WaveOutThread( notification_thread_t * );
127 static void InterleaveFloat32( float *, int *, int );
128 static void InterleaveS16( int16_t *, int *, int );
130 /*****************************************************************************
132 *****************************************************************************/
133 #define FLOAT_TEXT N_("Use float32 output")
134 #define FLOAT_LONGTEXT N_( \
135 "The option allows you to enable or disable the high-quality float32 " \
136 "audio output mode (which is not well supported by some soundcards)." )
139 set_description( _("Win32 waveOut extension output") );
140 set_capability( "audio output", 50 );
141 add_bool( "waveout-float32", 1, NULL, FLOAT_TEXT, FLOAT_LONGTEXT, VLC_TRUE );
142 set_callbacks( Open, Close );
145 /*****************************************************************************
146 * aout_sys_t: waveOut audio output method descriptor
147 *****************************************************************************
148 * This structure is part of the audio output thread descriptor.
149 * It describes the waveOut specific properties of an audio device.
150 *****************************************************************************/
153 HWAVEOUT h_waveout; /* handle to waveout instance */
155 WAVEFORMATEXTENSIBLE waveformat; /* audio format */
157 WAVEHDR waveheader[FRAMES_NUM];
159 notification_thread_t *p_notif; /* WaveOutThread id */
164 byte_t *p_silence_buffer; /* buffer we use to play silence */
166 vlc_bool_t b_chan_reorder; /* do we need channel reordering */
170 static const uint32_t pi_channels_in[] =
171 { AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT,
172 AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT,
173 AOUT_CHAN_CENTER, AOUT_CHAN_LFE };
174 static const uint32_t pi_channels_out[] =
175 { SPEAKER_FRONT_LEFT, SPEAKER_FRONT_RIGHT,
176 SPEAKER_BACK_LEFT, SPEAKER_BACK_RIGHT,
177 SPEAKER_FRONT_CENTER, SPEAKER_LOW_FREQUENCY };
178 static const uint32_t pi_channels_ordered[] =
179 { SPEAKER_FRONT_LEFT, SPEAKER_FRONT_RIGHT, SPEAKER_FRONT_CENTER,
180 SPEAKER_LOW_FREQUENCY,
181 SPEAKER_BACK_LEFT, SPEAKER_BACK_RIGHT };
183 /*****************************************************************************
184 * Open: open the audio device
185 *****************************************************************************
186 * This function opens and setups Win32 waveOut
187 *****************************************************************************/
188 static int Open( vlc_object_t *p_this )
190 aout_instance_t *p_aout = (aout_instance_t *)p_this;
194 /* Allocate structure */
195 p_aout->output.p_sys = malloc( sizeof( aout_sys_t ) );
197 if( p_aout->output.p_sys == NULL )
199 msg_Err( p_aout, "out of memory" );
203 p_aout->output.pf_play = Play;
204 p_aout->output.p_sys->pi_chan_table = NULL;
205 p_aout->b_die = VLC_FALSE;
207 if( var_Type( p_aout, "audio-device" ) == 0 )
212 if( var_Get( p_aout, "audio-device", &val ) < 0 )
214 /* Probe() has failed. */
215 free( p_aout->output.p_sys );
219 var_Create( p_aout, "waveout-float32", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
221 /* Open the device */
222 if( val.i_int == AOUT_VAR_SPDIF )
224 p_aout->output.output.i_format = VLC_FOURCC('s','p','d','i');
226 if( OpenWaveOut( p_aout, VLC_FOURCC('s','p','d','i'),
227 p_aout->output.output.i_physical_channels,
228 aout_FormatNbChannels( &p_aout->output.output ),
229 p_aout->output.output.i_rate, VLC_FALSE )
232 msg_Err( p_aout, "cannot open waveout audio device" );
233 free( p_aout->output.p_sys );
237 /* Calculate the frame size in bytes */
238 p_aout->output.i_nb_samples = A52_FRAME_NB;
239 p_aout->output.output.i_bytes_per_frame = AOUT_SPDIF_SIZE;
240 p_aout->output.output.i_frame_length = A52_FRAME_NB;
241 p_aout->output.p_sys->i_buffer_size =
242 p_aout->output.output.i_bytes_per_frame;
244 aout_VolumeNoneInit( p_aout );
248 if( val.i_int == AOUT_VAR_5_1 )
250 p_aout->output.output.i_physical_channels
251 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
252 | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT
255 else if( val.i_int == AOUT_VAR_2F2R )
257 p_aout->output.output.i_physical_channels
258 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT
259 | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
261 else if( val.i_int == AOUT_VAR_MONO )
263 p_aout->output.output.i_physical_channels = AOUT_CHAN_CENTER;
267 p_aout->output.output.i_physical_channels
268 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
271 if( OpenWaveOutPCM( p_aout, &p_aout->output.output.i_format,
272 p_aout->output.output.i_physical_channels,
273 aout_FormatNbChannels( &p_aout->output.output ),
274 p_aout->output.output.i_rate, VLC_FALSE )
277 msg_Err( p_aout, "cannot open waveout audio device" );
278 free( p_aout->output.p_sys );
282 /* Calculate the frame size in bytes */
283 p_aout->output.i_nb_samples = FRAME_SIZE;
284 aout_FormatPrepare( &p_aout->output.output );
285 p_aout->output.p_sys->i_buffer_size = FRAME_SIZE *
286 p_aout->output.output.i_bytes_per_frame;
288 aout_VolumeSoftInit( p_aout );
292 waveOutReset( p_aout->output.p_sys->h_waveout );
294 /* Allocate silence buffer */
295 p_aout->output.p_sys->p_silence_buffer =
296 malloc( p_aout->output.p_sys->i_buffer_size );
297 if( p_aout->output.p_sys->p_silence_buffer == NULL )
299 free( p_aout->output.p_sys );
300 msg_Err( p_aout, "out of memory" );
304 /* Zero the buffer. WinCE doesn't have calloc(). */
305 memset( p_aout->output.p_sys->p_silence_buffer, 0,
306 p_aout->output.p_sys->i_buffer_size );
308 /* Now we need to setup our waveOut play notification structure */
309 p_aout->output.p_sys->p_notif =
310 vlc_object_create( p_aout, sizeof(notification_thread_t) );
311 p_aout->output.p_sys->p_notif->p_aout = p_aout;
312 p_aout->output.p_sys->event = CreateEvent( NULL, FALSE, FALSE, NULL );
314 /* Then launch the notification thread */
315 if( vlc_thread_create( p_aout->output.p_sys->p_notif,
316 "waveOut Notification Thread", WaveOutThread,
317 VLC_THREAD_PRIORITY_HIGHEST, VLC_FALSE ) )
319 msg_Err( p_aout, "cannot create WaveOutThread" );
322 /* We need to kick off the playback in order to have the callback properly
324 for( i = 0; i < FRAMES_NUM; i++ )
326 p_aout->output.p_sys->waveheader[i].dwFlags = WHDR_DONE;
328 PlayWaveOut( p_aout, p_aout->output.p_sys->h_waveout,
329 &p_aout->output.p_sys->waveheader[0], NULL );
334 /*****************************************************************************
335 * Probe: probe the audio device for available formats and channels
336 *****************************************************************************/
337 static void Probe( aout_instance_t * p_aout )
339 vlc_value_t val, text;
341 unsigned int i_physical_channels;
343 var_Create( p_aout, "audio-device", VLC_VAR_INTEGER | VLC_VAR_HASCHOICE );
344 text.psz_string = _("Audio Device");
345 var_Change( p_aout, "audio-device", VLC_VAR_SETTEXT, &text, NULL );
347 /* Test for 5.1 support */
348 i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
349 AOUT_CHAN_CENTER | AOUT_CHAN_REARLEFT |
350 AOUT_CHAN_REARRIGHT | AOUT_CHAN_LFE;
351 if( p_aout->output.output.i_physical_channels == i_physical_channels )
353 if( OpenWaveOutPCM( p_aout, &i_format,
354 i_physical_channels, 6,
355 p_aout->output.output.i_rate, VLC_TRUE )
358 val.i_int = AOUT_VAR_5_1;
359 text.psz_string = N_("5.1");
360 var_Change( p_aout, "audio-device",
361 VLC_VAR_ADDCHOICE, &val, &text );
362 msg_Dbg( p_aout, "device supports 5.1 channels" );
366 /* Test for 2 Front 2 Rear support */
367 i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
368 AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
369 if( ( p_aout->output.output.i_physical_channels & i_physical_channels )
370 == i_physical_channels )
372 if( OpenWaveOutPCM( p_aout, &i_format,
373 i_physical_channels, 4,
374 p_aout->output.output.i_rate, VLC_TRUE )
377 val.i_int = AOUT_VAR_2F2R;
378 text.psz_string = N_("2 Front 2 Rear");
379 var_Change( p_aout, "audio-device",
380 VLC_VAR_ADDCHOICE, &val, &text );
381 msg_Dbg( p_aout, "device supports 4 channels" );
385 /* Test for stereo support */
386 i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
387 if( OpenWaveOutPCM( p_aout, &i_format,
388 i_physical_channels, 2,
389 p_aout->output.output.i_rate, VLC_TRUE )
392 val.i_int = AOUT_VAR_STEREO;
393 text.psz_string = N_("Stereo");
394 var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
395 msg_Dbg( p_aout, "device supports 2 channels" );
398 /* Test for mono support */
399 i_physical_channels = AOUT_CHAN_CENTER;
400 if( OpenWaveOutPCM( p_aout, &i_format,
401 i_physical_channels, 1,
402 p_aout->output.output.i_rate, VLC_TRUE )
405 val.i_int = AOUT_VAR_MONO;
406 text.psz_string = N_("Mono");
407 var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
408 msg_Dbg( p_aout, "device supports 1 channel" );
411 /* Test for SPDIF support */
412 if ( AOUT_FMT_NON_LINEAR( &p_aout->output.output ) )
414 if( OpenWaveOut( p_aout, VLC_FOURCC('s','p','d','i'),
415 p_aout->output.output.i_physical_channels,
416 aout_FormatNbChannels( &p_aout->output.output ),
417 p_aout->output.output.i_rate, VLC_TRUE )
420 msg_Dbg( p_aout, "device supports A/52 over S/PDIF" );
421 val.i_int = AOUT_VAR_SPDIF;
422 text.psz_string = N_("A/52 over S/PDIF");
423 var_Change( p_aout, "audio-device",
424 VLC_VAR_ADDCHOICE, &val, &text );
425 if( config_GetInt( p_aout, "spdif" ) )
426 var_Set( p_aout, "audio-device", val );
430 var_Change( p_aout, "audio-device", VLC_VAR_CHOICESCOUNT, &val, NULL );
433 /* Probe() has failed. */
434 var_Destroy( p_aout, "audio-device" );
438 var_AddCallback( p_aout, "audio-device", aout_ChannelsRestart, NULL );
440 val.b_bool = VLC_TRUE;
441 var_Set( p_aout, "intf-change", val );
444 /*****************************************************************************
445 * Play: play a sound buffer
446 *****************************************************************************
447 * This doesn't actually play the buffer. This just stores the buffer so it
448 * can be played by the callback thread.
449 *****************************************************************************/
450 static void Play( aout_instance_t *_p_aout )
454 /*****************************************************************************
455 * Close: close the audio device
456 *****************************************************************************/
457 static void Close( vlc_object_t *p_this )
459 aout_instance_t *p_aout = (aout_instance_t *)p_this;
461 /* Before calling waveOutClose we must reset the device */
462 p_aout->b_die = VLC_TRUE;
464 /* wake up the audio thread */
465 SetEvent( p_aout->output.p_sys->event );
466 vlc_thread_join( p_aout->output.p_sys->p_notif );
467 CloseHandle( p_aout->output.p_sys->event );
469 /* Wait for the waveout buffers to be freed */
473 vlc_bool_t b_not_done = VLC_FALSE;
475 for( i = 0; i < FRAMES_NUM; i++ )
477 if( !(p_aout->output.p_sys->waveheader[i].dwFlags & WHDR_DONE) )
478 b_not_done = VLC_TRUE;
487 waveOutReset( p_aout->output.p_sys->h_waveout );
489 /* Close the device */
490 if( waveOutClose( p_aout->output.p_sys->h_waveout ) != MMSYSERR_NOERROR )
492 msg_Err( p_aout, "waveOutClose failed" );
495 free( p_aout->output.p_sys->p_silence_buffer );
496 if( p_aout->output.p_sys->pi_chan_table )
497 free( p_aout->output.p_sys->pi_chan_table );
498 free( p_aout->output.p_sys );
501 /*****************************************************************************
502 * OpenWaveOut: open the waveout sound device
503 ****************************************************************************/
504 static int OpenWaveOut( aout_instance_t *p_aout, int i_format,
505 int i_channels, int i_nb_channels, int i_rate,
511 /* Set sound format */
513 #define waveformat p_aout->output.p_sys->waveformat
515 waveformat.dwChannelMask = 0;
516 for( i = 0; i < sizeof(pi_channels_in)/sizeof(uint32_t); i++ )
518 if( i_channels & pi_channels_in[i] )
519 waveformat.dwChannelMask |= pi_channels_out[i];
524 case VLC_FOURCC('s','p','d','i'):
526 /* To prevent channel re-ordering */
527 waveformat.dwChannelMask = SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT;
528 waveformat.Format.wBitsPerSample = 16;
529 waveformat.Samples.wValidBitsPerSample =
530 waveformat.Format.wBitsPerSample;
531 waveformat.Format.wFormatTag = WAVE_FORMAT_DOLBY_AC3_SPDIF;
532 waveformat.SubFormat = __KSDATAFORMAT_SUBTYPE_DOLBY_AC3_SPDIF;
535 case VLC_FOURCC('f','l','3','2'):
536 waveformat.Format.wBitsPerSample = sizeof(float) * 8;
537 waveformat.Samples.wValidBitsPerSample =
538 waveformat.Format.wBitsPerSample;
539 waveformat.Format.wFormatTag = WAVE_FORMAT_IEEE_FLOAT;
540 waveformat.SubFormat = __KSDATAFORMAT_SUBTYPE_IEEE_FLOAT;
543 case VLC_FOURCC('s','1','6','l'):
544 waveformat.Format.wBitsPerSample = 16;
545 waveformat.Samples.wValidBitsPerSample =
546 waveformat.Format.wBitsPerSample;
547 waveformat.Format.wFormatTag = WAVE_FORMAT_PCM;
548 waveformat.SubFormat = __KSDATAFORMAT_SUBTYPE_PCM;
552 waveformat.Format.nChannels = i_nb_channels;
553 waveformat.Format.nSamplesPerSec = i_rate;
554 waveformat.Format.nBlockAlign =
555 waveformat.Format.wBitsPerSample / 8 * i_nb_channels;
556 waveformat.Format.nAvgBytesPerSec =
557 waveformat.Format.nSamplesPerSec * waveformat.Format.nBlockAlign;
559 /* Only use the new WAVE_FORMAT_EXTENSIBLE format for multichannel audio */
560 if( i_nb_channels <= 2 )
562 waveformat.Format.cbSize = 0;
566 waveformat.Format.wFormatTag = WAVE_FORMAT_EXTENSIBLE;
567 waveformat.Format.cbSize =
568 sizeof(WAVEFORMATEXTENSIBLE) - sizeof(WAVEFORMATEX);
571 /* Open the device */
572 result = waveOutOpen( &p_aout->output.p_sys->h_waveout, WAVE_MAPPER,
573 (WAVEFORMATEX *)&waveformat,
574 (DWORD_PTR)WaveOutCallback, (DWORD_PTR)p_aout,
575 CALLBACK_FUNCTION | (b_probe?WAVE_FORMAT_QUERY:0) );
576 if( result == WAVERR_BADFORMAT )
578 msg_Warn( p_aout, "waveOutOpen failed WAVERR_BADFORMAT" );
581 if( result == MMSYSERR_ALLOCATED )
583 msg_Warn( p_aout, "waveOutOpen failed WAVERR_ALLOCATED" );
586 if( result != MMSYSERR_NOERROR )
588 msg_Warn( p_aout, "waveOutOpen failed" );
592 CheckReordering( p_aout, i_nb_channels );
600 /*****************************************************************************
601 * OpenWaveOutPCM: open a PCM waveout sound device
602 ****************************************************************************/
603 static int OpenWaveOutPCM( aout_instance_t *p_aout, int *i_format,
604 int i_channels, int i_nb_channels, int i_rate,
609 var_Get( p_aout, "waveout-float32", &val );
611 if( !val.b_bool || OpenWaveOut( p_aout, VLC_FOURCC('f','l','3','2'),
612 i_channels, i_nb_channels, i_rate, b_probe )
615 if ( OpenWaveOut( p_aout, VLC_FOURCC('s','1','6','l'),
616 i_channels, i_nb_channels, i_rate, b_probe )
623 *i_format = VLC_FOURCC('s','1','6','l');
629 *i_format = VLC_FOURCC('f','l','3','2');
634 /*****************************************************************************
635 * CheckReordering: Check if we need to do some channel re-ordering (the ac3
636 * channel order is different from the one chosen by
638 *****************************************************************************/
639 static void CheckReordering( aout_instance_t *p_aout, int i_nb_channels )
643 #define waveformat p_aout->output.p_sys->waveformat
644 #define pi_chan_table p_aout->output.p_sys->pi_chan_table
646 p_aout->output.p_sys->b_chan_reorder = VLC_FALSE;
648 pi_chan_table = malloc( i_nb_channels * sizeof(int) );
655 i < (int)(sizeof(pi_channels_out)/sizeof(uint32_t)); i++ )
657 if( waveformat.dwChannelMask & pi_channels_out[i] )
660 pi_channels_out[i] != pi_channels_ordered[k]; k++ )
662 if( waveformat.dwChannelMask & pi_channels_ordered[k] )
668 pi_chan_table[j] = l;
674 for( i = 0; i < i_nb_channels; i++ )
676 if( pi_chan_table[i] != i )
678 p_aout->output.p_sys->b_chan_reorder = VLC_TRUE;
682 if( p_aout->output.p_sys->b_chan_reorder )
684 msg_Dbg( p_aout, "channel reordering needed" );
691 /*****************************************************************************
692 * PlayWaveOut: play a buffer through the WaveOut device
693 *****************************************************************************/
694 static int PlayWaveOut( aout_instance_t *p_aout, HWAVEOUT h_waveout,
695 WAVEHDR *p_waveheader, aout_buffer_t *p_buffer )
699 /* Prepare the buffer */
700 if( p_buffer != NULL )
701 p_waveheader->lpData = p_buffer->p_buffer;
703 /* Use silence buffer instead */
704 p_waveheader->lpData = p_aout->output.p_sys->p_silence_buffer;
706 p_waveheader->dwUser = (DWORD_PTR)p_buffer;
707 p_waveheader->dwBufferLength = p_aout->output.p_sys->i_buffer_size;
708 p_waveheader->dwFlags = 0;
710 result = waveOutPrepareHeader( h_waveout, p_waveheader, sizeof(WAVEHDR) );
711 if( result != MMSYSERR_NOERROR )
713 msg_Err( p_aout, "waveOutPrepareHeader failed" );
717 /* Send the buffer to the waveOut queue */
718 result = waveOutWrite( h_waveout, p_waveheader, sizeof(WAVEHDR) );
719 if( result != MMSYSERR_NOERROR )
721 msg_Err( p_aout, "waveOutWrite failed" );
728 /*****************************************************************************
729 * WaveOutCallback: what to do once WaveOut has played its sound samples
730 *****************************************************************************/
731 static void CALLBACK WaveOutCallback( HWAVEOUT h_waveout, UINT uMsg,
733 DWORD dwParam1, DWORD dwParam2 )
735 aout_instance_t *p_aout = (aout_instance_t *)_p_aout;
736 WAVEHDR *p_waveheader = (WAVEHDR *)dwParam1;
737 int i, i_queued_frames = 0;
739 if( uMsg != WOM_DONE ) return;
741 /* Unprepare and free the buffer which has just been played */
742 waveOutUnprepareHeader( h_waveout, p_waveheader, sizeof(WAVEHDR) );
743 if( p_waveheader->dwUser )
744 aout_BufferFree( (aout_buffer_t *)p_waveheader->dwUser );
746 if( p_aout->b_die ) return;
748 /* Find out the current latency */
749 for( i = 0; i < FRAMES_NUM; i++ )
751 /* Check if frame buf is available */
752 if( !(p_aout->output.p_sys->waveheader[i].dwFlags & WHDR_DONE) )
758 /* Don't wake up the thread too much */
759 if( i_queued_frames < FRAMES_NUM / 2 )
760 SetEvent( p_aout->output.p_sys->event );
763 /*****************************************************************************
764 * InterleaveFloat32/S16: change the channel order to the Microsoft one.
765 *****************************************************************************/
766 static void InterleaveFloat32( float *p_buf, int *pi_chan_table,
772 for( i = 0; i < FRAME_SIZE; i++ )
774 for( j = 0; j < i_nb_channels; j++ )
776 p_tmp[pi_chan_table[j]] = p_buf[i*i_nb_channels + j];
779 memcpy( &p_buf[i*i_nb_channels], p_tmp,
780 i_nb_channels * sizeof(float) );
784 static void InterleaveS16( int16_t *p_buf, int *pi_chan_table,
790 for( i = 0; i < FRAME_SIZE; i++ )
792 for( j = 0; j < i_nb_channels; j++ )
794 p_tmp[pi_chan_table[j]] = p_buf[i*i_nb_channels + j];
797 memcpy( &p_buf[i*i_nb_channels], p_tmp,
798 i_nb_channels * sizeof(int16_t) );
802 /*****************************************************************************
803 * WaveOutThread: this thread will capture play notification events.
804 *****************************************************************************
805 * We use this thread to feed new audio samples to the sound card because
806 * we are not authorized to use waveOutWrite() directly in the waveout
808 *****************************************************************************/
809 static void WaveOutThread( notification_thread_t *p_notif )
811 aout_instance_t *p_aout = p_notif->p_aout;
812 aout_buffer_t *p_buffer = NULL;
814 int i, i_queued_frames;
816 /* We don't want any resampling when using S/PDIF */
817 b_sleek = p_aout->output.output.i_format == VLC_FOURCC('s','p','d','i');
821 WaitForSingleObject( p_aout->output.p_sys->event, INFINITE );
822 if( p_aout->b_die ) return;
824 /* Find out the current latency */
826 for( i = 0; i < FRAMES_NUM; i++ )
828 /* Check if frame buf is available */
829 if( !(p_aout->output.p_sys->waveheader[i].dwFlags & WHDR_DONE) )
835 /* Try to fill in as many frame buffers as possible */
836 for( i = 0; i < FRAMES_NUM; i++ )
838 /* Check if frame buf is available */
839 if( p_aout->output.p_sys->waveheader[i].dwFlags & WHDR_DONE )
841 /* Take into account the latency */
842 p_buffer = aout_OutputNextBuffer( p_aout,
843 mdate() + 1000000 * i_queued_frames /
844 p_aout->output.output.i_rate * p_aout->output.i_nb_samples,
847 if( !p_buffer && i_queued_frames )
849 /* We aren't late so no need to play a blank sample */
853 /* Do the channel reordering here */
854 if( p_buffer && p_aout->output.p_sys->b_chan_reorder )
856 if( p_aout->output.output.i_format ==
857 VLC_FOURCC('s','1','6','l') )
858 InterleaveS16( (int16_t *)p_buffer->p_buffer,
859 p_aout->output.p_sys->pi_chan_table,
860 aout_FormatNbChannels( &p_aout->output.output ) );
862 InterleaveFloat32( (float *)p_buffer->p_buffer,
863 p_aout->output.p_sys->pi_chan_table,
864 aout_FormatNbChannels( &p_aout->output.output ) );
867 PlayWaveOut( p_aout, p_aout->output.p_sys->h_waveout,
868 &p_aout->output.p_sys->waveheader[i] , p_buffer );