root/modules/audio_output/directx.c

Revision 67f455a8bc8ffa11a3596392b5f0051811918a19, 43.7 kB (checked in by Rémi Denis-Courmont <rdenis@simphalempin.com>, 3 months ago)

Do not call vlc_thread_ready with non-waiting vlc_thread_create

  • Property mode set to 100644
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1 /*****************************************************************************
2  * directx.c: Windows DirectX audio output method
3  *****************************************************************************
4  * Copyright (C) 2001 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
21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22  *****************************************************************************/
23
24 /*****************************************************************************
25  * Preamble
26  *****************************************************************************/
27
28
29 #ifdef HAVE_CONFIG_H
30 # include "config.h"
31 #endif
32
33 #include <vlc_common.h>
34 #include <vlc_plugin.h>
35 #include <vlc_aout.h>
36
37 #include <windows.h>
38 #include <mmsystem.h>
39 #include <dsound.h>
40
41 #define FRAME_SIZE ((int)p_aout->output.output.i_rate/20) /* Size in samples */
42 #define FRAMES_NUM 8                                      /* Needs to be > 3 */
43
44 /*****************************************************************************
45  * DirectSound GUIDs.
46  * Defining them here allows us to get rid of the dxguid library during
47  * the linking stage.
48  *****************************************************************************/
49 #include <initguid.h>
50
51 /*****************************************************************************
52  * Useful macros
53  *****************************************************************************/
54 #ifndef WAVE_FORMAT_IEEE_FLOAT
55 #   define WAVE_FORMAT_IEEE_FLOAT 0x0003
56 #endif
57
58 #ifndef WAVE_FORMAT_DOLBY_AC3_SPDIF
59 #   define WAVE_FORMAT_DOLBY_AC3_SPDIF 0x0092
60 #endif
61
62 #ifndef WAVE_FORMAT_EXTENSIBLE
63 #define  WAVE_FORMAT_EXTENSIBLE   0xFFFE
64 #endif
65
66 #ifndef SPEAKER_FRONT_LEFT
67 #   define SPEAKER_FRONT_LEFT             0x1
68 #   define SPEAKER_FRONT_RIGHT            0x2
69 #   define SPEAKER_FRONT_CENTER           0x4
70 #   define SPEAKER_LOW_FREQUENCY          0x8
71 #   define SPEAKER_BACK_LEFT              0x10
72 #   define SPEAKER_BACK_RIGHT             0x20
73 #   define SPEAKER_FRONT_LEFT_OF_CENTER   0x40
74 #   define SPEAKER_FRONT_RIGHT_OF_CENTER  0x80
75 #   define SPEAKER_BACK_CENTER            0x100
76 #   define SPEAKER_SIDE_LEFT              0x200
77 #   define SPEAKER_SIDE_RIGHT             0x400
78 #   define SPEAKER_TOP_CENTER             0x800
79 #   define SPEAKER_TOP_FRONT_LEFT         0x1000
80 #   define SPEAKER_TOP_FRONT_CENTER       0x2000
81 #   define SPEAKER_TOP_FRONT_RIGHT        0x4000
82 #   define SPEAKER_TOP_BACK_LEFT          0x8000
83 #   define SPEAKER_TOP_BACK_CENTER        0x10000
84 #   define SPEAKER_TOP_BACK_RIGHT         0x20000
85 #   define SPEAKER_RESERVED               0x80000000
86 #endif
87
88 #ifndef DSSPEAKER_DSSPEAKER_DIRECTOUT
89 #   define DSSPEAKER_DSSPEAKER_DIRECTOUT         0x00000000
90 #endif
91 #ifndef DSSPEAKER_HEADPHONE
92 #   define DSSPEAKER_HEADPHONE         0x00000001
93 #endif
94 #ifndef DSSPEAKER_MONO
95 #   define DSSPEAKER_MONO              0x00000002
96 #endif
97 #ifndef DSSPEAKER_QUAD
98 #   define DSSPEAKER_QUAD              0x00000003
99 #endif
100 #ifndef DSSPEAKER_STEREO
101 #   define DSSPEAKER_STEREO            0x00000004
102 #endif
103 #ifndef DSSPEAKER_SURROUND
104 #   define DSSPEAKER_SURROUND          0x00000005
105 #endif
106 #ifndef DSSPEAKER_5POINT1
107 #   define DSSPEAKER_5POINT1           0x00000006
108 #endif
109 #ifndef DSSPEAKER_7POINT1
110 #   define DSSPEAKER_7POINT1           0x00000007
111 #endif
112 #ifndef DSSPEAKER_7POINT1_SURROUND
113 #   define DSSPEAKER_7POINT1_SURROUND           0x00000008
114 #endif
115 #ifndef DSSPEAKER_7POINT1_WIDE
116 #   define DSSPEAKER_7POINT1_WIDE           DSSPEAKER_7POINT1
117 #endif
118
119 #ifndef _WAVEFORMATEXTENSIBLE_
120 typedef struct {
121     WAVEFORMATEX    Format;
122     union {
123         WORD wValidBitsPerSample;       /* bits of precision  */
124         WORD wSamplesPerBlock;          /* valid if wBitsPerSample==0 */
125         WORD wReserved;                 /* If neither applies, set to zero. */
126     } Samples;
127     DWORD           dwChannelMask;      /* which channels are */
128                                         /* present in stream  */
129     GUID            SubFormat;
130 } WAVEFORMATEXTENSIBLE, *PWAVEFORMATEXTENSIBLE;
131 #endif
132
133 DEFINE_GUID( _KSDATAFORMAT_SUBTYPE_IEEE_FLOAT, WAVE_FORMAT_IEEE_FLOAT, 0x0000, 0x0010, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 );
134 DEFINE_GUID( _KSDATAFORMAT_SUBTYPE_PCM, WAVE_FORMAT_PCM, 0x0000, 0x0010, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 );
135 DEFINE_GUID( _KSDATAFORMAT_SUBTYPE_DOLBY_AC3_SPDIF, WAVE_FORMAT_DOLBY_AC3_SPDIF, 0x0000, 0x0010, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 );
136
137 /*****************************************************************************
138  * notification_thread_t: DirectX event thread
139  *****************************************************************************/
140 typedef struct notification_thread_t
141 {
142     VLC_COMMON_MEMBERS
143
144     aout_instance_t *p_aout;
145     int i_frame_size;                          /* size in bytes of one frame */
146     int i_write_slot;       /* current write position in our circular buffer */
147
148     mtime_t start_date;
149     HANDLE event;
150
151 } notification_thread_t;
152
153 /*****************************************************************************
154  * aout_sys_t: directx audio output method descriptor
155  *****************************************************************************
156  * This structure is part of the audio output thread descriptor.
157  * It describes the direct sound specific properties of an audio device.
158  *****************************************************************************/
159 struct aout_sys_t
160 {
161     HINSTANCE           hdsound_dll;      /* handle of the opened dsound dll */
162
163     int                 i_device_id;                 /*  user defined device */
164     LPGUID              p_device_guid;
165
166     LPDIRECTSOUND       p_dsobject;              /* main Direct Sound object */
167     LPDIRECTSOUNDBUFFER p_dsbuffer;   /* the sound buffer we use (direct sound
168                                        * takes care of mixing all the
169                                        * secondary buffers into the primary) */
170
171     notification_thread_t *p_notif;                  /* DirectSoundThread id */
172
173     int b_playing;                                         /* playing status */
174
175     int i_frame_size;                         /* Size in bytes of one frame */
176
177     bool b_chan_reorder;              /* do we need channel reordering */
178     int pi_chan_table[AOUT_CHAN_MAX];
179     uint32_t i_channel_mask;
180     uint32_t i_bits_per_sample;
181     uint32_t i_channels;
182 };
183
184 static const uint32_t pi_channels_src[] =
185     { AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT,
186       AOUT_CHAN_MIDDLELEFT, AOUT_CHAN_MIDDLERIGHT,
187       AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT, AOUT_CHAN_REARCENTER,
188       AOUT_CHAN_CENTER, AOUT_CHAN_LFE, 0 };
189 static const uint32_t pi_channels_in[] =
190     { SPEAKER_FRONT_LEFT, SPEAKER_FRONT_RIGHT,
191       SPEAKER_SIDE_LEFT, SPEAKER_SIDE_RIGHT,
192       SPEAKER_BACK_LEFT, SPEAKER_BACK_RIGHT, SPEAKER_BACK_CENTER,
193       SPEAKER_FRONT_CENTER, SPEAKER_LOW_FREQUENCY, 0 };
194 static const uint32_t pi_channels_out[] =
195     { SPEAKER_FRONT_LEFT, SPEAKER_FRONT_RIGHT,
196       SPEAKER_FRONT_CENTER, SPEAKER_LOW_FREQUENCY,
197       SPEAKER_BACK_LEFT, SPEAKER_BACK_RIGHT,
198       SPEAKER_BACK_CENTER,
199       SPEAKER_SIDE_LEFT, SPEAKER_SIDE_RIGHT, 0 };
200
201 /*****************************************************************************
202  * Local prototypes.
203  *****************************************************************************/
204 static int  OpenAudio  ( vlc_object_t * );
205 static void CloseAudio ( vlc_object_t * );
206 static void Play       ( aout_instance_t * );
207
208 /* local functions */
209 static void Probe             ( aout_instance_t * );
210 static int  InitDirectSound   ( aout_instance_t * );
211 static int  CreateDSBuffer    ( aout_instance_t *, int, int, int, int, int, bool );
212 static int  CreateDSBufferPCM ( aout_instance_t *, int*, int, int, int, bool );
213 static void DestroyDSBuffer   ( aout_instance_t * );
214 static void* DirectSoundThread( vlc_object_t * );
215 static int  FillBuffer        ( aout_instance_t *, int, aout_buffer_t * );
216
217 /*****************************************************************************
218  * Module descriptor
219  *****************************************************************************/
220 #define DEVICE_TEXT N_("Output device")
221 #define DEVICE_LONGTEXT N_( \
222     "DirectX device number: 0 default device, 1..N device by number" \
223     "(Note that the default device appears as 0 AND another number)." )
224 #define FLOAT_TEXT N_("Use float32 output")
225 #define FLOAT_LONGTEXT N_( \
226     "The option allows you to enable or disable the high-quality float32 " \
227     "audio output mode (which is not well supported by some soundcards)." )
228
229 vlc_module_begin();
230     set_description( N_("DirectX audio output") );
231     set_shortname( "DirectX" );
232     set_capability( "audio output", 100 );
233     set_category( CAT_AUDIO );
234     set_subcategory( SUBCAT_AUDIO_AOUT );
235     add_shortcut( "directx" );
236     add_integer( "directx-audio-device", 0, NULL, DEVICE_TEXT,
237                  DEVICE_LONGTEXT, true );
238     add_bool( "directx-audio-float32", 0, 0, FLOAT_TEXT,
239               FLOAT_LONGTEXT, true );
240     set_callbacks( OpenAudio, CloseAudio );
241 vlc_module_end();
242
243 /*****************************************************************************
244  * OpenAudio: open the audio device
245  *****************************************************************************
246  * This function opens and setups Direct Sound.
247  *****************************************************************************/
248 static int OpenAudio( vlc_object_t *p_this )
249 {
250     aout_instance_t * p_aout = (aout_instance_t *)p_this;
251     vlc_value_t val;
252
253     msg_Dbg( p_aout, "OpenAudio" );
254
255    /* Allocate structure */
256     p_aout->output.p_sys = malloc( sizeof( aout_sys_t ) );
257     if( p_aout->output.p_sys == NULL )
258         return VLC_ENOMEM;
259
260     /* Initialize some variables */
261     p_aout->output.p_sys->p_dsobject = NULL;
262     p_aout->output.p_sys->p_dsbuffer = NULL;
263     p_aout->output.p_sys->p_notif = NULL;
264     p_aout->output.p_sys->b_playing = 0;
265
266     p_aout->output.pf_play = Play;
267     aout_VolumeSoftInit( p_aout );
268
269     /* Retrieve config values */
270     var_Create( p_aout, "directx-audio-float32",
271                 VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
272     var_Create( p_aout, "directx-audio-device",
273                 VLC_VAR_INTEGER|VLC_VAR_DOINHERIT );
274     var_Get( p_aout, "directx-audio-device", &val );
275     p_aout->output.p_sys->i_device_id = val.i_int;
276     p_aout->output.p_sys->p_device_guid = 0;
277
278     /* Initialise DirectSound */
279     if( InitDirectSound( p_aout ) )
280     {
281         msg_Err( p_aout, "cannot initialize DirectSound" );
282         goto error;
283     }
284
285     if( var_Type( p_aout, "audio-device" ) == 0 )
286     {
287         Probe( p_aout );
288     }
289
290     if( var_Get( p_aout, "audio-device", &val ) < 0 )
291     {
292         /* Probe() has failed. */
293         goto error;
294     }
295
296     /* Open the device */
297     if( val.i_int == AOUT_VAR_SPDIF )
298     {
299         p_aout->output.output.i_format = VLC_FOURCC('s','p','d','i');
300
301         /* Calculate the frame size in bytes */
302         p_aout->output.i_nb_samples = A52_FRAME_NB;
303         p_aout->output.output.i_bytes_per_frame = AOUT_SPDIF_SIZE;
304         p_aout->output.output.i_frame_length = A52_FRAME_NB;
305         p_aout->output.p_sys->i_frame_size =
306             p_aout->output.output.i_bytes_per_frame;
307
308         if( CreateDSBuffer( p_aout, VLC_FOURCC('s','p','d','i'),
309                             p_aout->output.output.i_physical_channels,
310                             aout_FormatNbChannels( &p_aout->output.output ),
311                             p_aout->output.output.i_rate,
312                             p_aout->output.p_sys->i_frame_size, false )
313             != VLC_SUCCESS )
314         {
315             msg_Err( p_aout, "cannot open directx audio device" );
316             free( p_aout->output.p_sys );
317             return VLC_EGENERIC;
318         }
319
320         aout_VolumeNoneInit( p_aout );
321     }
322     else
323     {
324         if( val.i_int == AOUT_VAR_5_1 )
325         {
326             p_aout->output.output.i_physical_channels
327                 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
328                    | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT
329                    | AOUT_CHAN_LFE;
330         }
331         else if( val.i_int == AOUT_VAR_7_1 )
332         {
333                     p_aout->output.output.i_physical_channels
334                         = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
335                            | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT
336                            | AOUT_CHAN_MIDDLELEFT | AOUT_CHAN_MIDDLERIGHT
337                            | AOUT_CHAN_LFE;
338         }
339         else if( val.i_int == AOUT_VAR_3F2R )
340         {
341             p_aout->output.output.i_physical_channels
342                 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
343                    | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
344         }
345         else if( val.i_int == AOUT_VAR_2F2R )
346         {
347             p_aout->output.output.i_physical_channels
348                 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT
349                    | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
350         }
351         else if( val.i_int == AOUT_VAR_MONO )
352         {
353             p_aout->output.output.i_physical_channels = AOUT_CHAN_CENTER;
354         }
355         else
356         {
357             p_aout->output.output.i_physical_channels
358                 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
359         }
360
361         if( CreateDSBufferPCM( p_aout, &p_aout->output.output.i_format,
362                                p_aout->output.output.i_physical_channels,
363                                aout_FormatNbChannels( &p_aout->output.output ),
364                                p_aout->output.output.i_rate, false )
365             != VLC_SUCCESS )
366         {
367             msg_Err( p_aout, "cannot open directx audio device" );
368             free( p_aout->output.p_sys );
369             return VLC_EGENERIC;
370         }
371
372         /* Calculate the frame size in bytes */
373         p_aout->output.i_nb_samples = FRAME_SIZE;
374         aout_FormatPrepare( &p_aout->output.output );
375         aout_VolumeSoftInit( p_aout );
376     }
377
378     /* Now we need to setup our DirectSound play notification structure */
379     p_aout->output.p_sys->p_notif =
380         vlc_object_create( p_aout, sizeof(notification_thread_t) );
381     p_aout->output.p_sys->p_notif->p_aout = p_aout;
382
383     p_aout->output.p_sys->p_notif->event = CreateEvent( 0, FALSE, FALSE, 0 );
384     p_aout->output.p_sys->p_notif->i_frame_size =
385         p_aout->output.p_sys->i_frame_size;
386
387     /* then launch the notification thread */
388     msg_Dbg( p_aout, "creating DirectSoundThread" );
389     if( vlc_thread_create( p_aout->output.p_sys->p_notif,
390                            "DirectSound Notification Thread",
391                            DirectSoundThread,
392                            VLC_THREAD_PRIORITY_HIGHEST, false ) )
393     {
394         msg_Err( p_aout, "cannot create DirectSoundThread" );
395         CloseHandle( p_aout->output.p_sys->p_notif->event );
396         vlc_object_release( p_aout->output.p_sys->p_notif );
397         p_aout->output.p_sys->p_notif = NULL;
398         goto error;
399     }
400
401     vlc_object_attach( p_aout->output.p_sys->p_notif, p_aout );
402
403     return VLC_SUCCESS;
404
405  error:
406     CloseAudio( VLC_OBJECT(p_aout) );
407     return VLC_EGENERIC;
408 }
409
410 /*****************************************************************************
411  * Probe: probe the audio device for available formats and channels
412  *****************************************************************************/
413 static void Probe( aout_instance_t * p_aout )
414 {
415     vlc_value_t val, text;
416     int i_format;
417     unsigned int i_physical_channels;
418     DWORD ui_speaker_config;
419     bool is_default_output_set = false;
420
421     var_Create( p_aout, "audio-device", VLC_VAR_INTEGER | VLC_VAR_HASCHOICE );
422     text.psz_string = _("Audio Device");
423     var_Change( p_aout, "audio-device", VLC_VAR_SETTEXT, &text, NULL );
424
425     /* Test for 5.1 support */
426     i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
427                           AOUT_CHAN_CENTER | AOUT_CHAN_REARLEFT |
428                           AOUT_CHAN_REARRIGHT | AOUT_CHAN_LFE;
429     if( p_aout->output.output.i_physical_channels == i_physical_channels )
430     {
431         if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 6,
432                                p_aout->output.output.i_rate, true )
433             == VLC_SUCCESS )
434         {
435             val.i_int = AOUT_VAR_5_1;
436             text.psz_string = "5.1";
437             var_Change( p_aout, "audio-device",
438                         VLC_VAR_ADDCHOICE, &val, &text );
439             var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
440             is_default_output_set = true;
441             msg_Dbg( p_aout, "device supports 5.1 channels" );
442         }
443     }
444
445     /* Test for 7.1 support */
446     i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
447                              AOUT_CHAN_CENTER | AOUT_CHAN_REARLEFT |
448                              AOUT_CHAN_MIDDLELEFT | AOUT_CHAN_MIDDLERIGHT |
449                              AOUT_CHAN_REARRIGHT | AOUT_CHAN_LFE;
450        if( p_aout->output.output.i_physical_channels == i_physical_channels )
451        {
452            if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 8,
453                                   p_aout->output.output.i_rate, true )
454                == VLC_SUCCESS )
455            {
456                val.i_int = AOUT_VAR_7_1;
457                text.psz_string = "7.1";
458                var_Change( p_aout, "audio-device",
459                            VLC_VAR_ADDCHOICE, &val, &text );
460                var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
461                is_default_output_set = true;
462                msg_Dbg( p_aout, "device supports 7.1 channels" );
463            }
464        }
465
466     /* Test for 3 Front 2 Rear support */
467     i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
468                           AOUT_CHAN_CENTER | AOUT_CHAN_REARLEFT |
469                           AOUT_CHAN_REARRIGHT;
470     if( p_aout->output.output.i_physical_channels == i_physical_channels )
471     {
472         if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 5,
473                                p_aout->output.output.i_rate, true )
474             == VLC_SUCCESS )
475         {
476             val.i_int = AOUT_VAR_3F2R;
477             text.psz_string = N_("3 Front 2 Rear");
478             var_Change( p_aout, "audio-device",
479                         VLC_VAR_ADDCHOICE, &val, &text );
480             if(!is_default_output_set)
481             {
482                 var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
483                 is_default_output_set = true;
484             }
485             msg_Dbg( p_aout, "device supports 5 channels" );
486         }
487     }
488
489     /* Test for 2 Front 2 Rear support */
490     i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
491                           AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
492     if( ( p_aout->output.output.i_physical_channels & i_physical_channels )
493         == i_physical_channels )
494     {
495         if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 4,
496                                p_aout->output.output.i_rate, true )
497             == VLC_SUCCESS )
498         {
499             val.i_int = AOUT_VAR_2F2R;
500             text.psz_string = N_("2 Front 2 Rear");
501             var_Change( p_aout, "audio-device",
502                         VLC_VAR_ADDCHOICE, &val, &text );
503             if(!is_default_output_set)
504             {
505                 var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
506                 is_default_output_set = true;
507             }
508             msg_Dbg( p_aout, "device supports 4 channels" );
509         }
510     }
511
512     /* Test for stereo support */
513     i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
514     if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 2,
515                            p_aout->output.output.i_rate, true )
516         == VLC_SUCCESS )
517     {
518         val.i_int = AOUT_VAR_STEREO;
519         text.psz_string = N_("Stereo");
520         var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
521         if(!is_default_output_set)
522         {
523             var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
524             is_default_output_set = true;
525             msg_Dbg( p_aout, "device supports 2 channels (DEFAULT!)" );
526         }
527         msg_Dbg( p_aout, "device supports 2 channels" );
528     }
529
530     /* Test for mono support */
531     i_physical_channels = AOUT_CHAN_CENTER;
532     if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 1,
533                            p_aout->output.output.i_rate, true )
534         == VLC_SUCCESS )
535     {
536         val.i_int = AOUT_VAR_MONO;
537         text.psz_string = N_("Mono");
538         var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
539         msg_Dbg( p_aout, "device supports 1 channel" );
540     }
541
542     /* Check the speaker configuration to determine which channel config should
543      * be the default */
544     if FAILED( IDirectSound_GetSpeakerConfig( p_aout->output.p_sys->p_dsobject,
545                                               &ui_speaker_config ) )
546     {
547         ui_speaker_config = DSSPEAKER_STEREO;
548         msg_Dbg( p_aout, "GetSpeakerConfig failed" );
549     }
550     switch( DSSPEAKER_CONFIG(ui_speaker_config) )
551     {
552     case DSSPEAKER_7POINT1:
553         msg_Dbg( p_aout, "Windows says your SpeakerConfig is 7.1" );
554         val.i_int = AOUT_VAR_7_1;
555         break;
556     case DSSPEAKER_5POINT1:
557         msg_Dbg( p_aout, "Windows says your SpeakerConfig is 5.1" );
558         val.i_int = AOUT_VAR_5_1;
559         break;
560     case DSSPEAKER_QUAD:
561         msg_Dbg( p_aout, "Windows says your SpeakerConfig is Quad" );
562         val.i_int = AOUT_VAR_2F2R;
563         break;
564 #if 0 /* Lots of people just get their settings wrong and complain that
565        * this is a problem with VLC so just don't ever set mono by default. */
566     case DSSPEAKER_MONO:
567         val.i_int = AOUT_VAR_MONO;
568         break;
569 #endif
570     case DSSPEAKER_SURROUND:
571         msg_Dbg( p_aout, "Windows says your SpeakerConfig is surround" );
572     case DSSPEAKER_STEREO:
573         msg_Dbg( p_aout, "Windows says your SpeakerConfig is stereo" );
574     default:
575         /* If nothing else is found, choose stereo output */
576         val.i_int = AOUT_VAR_STEREO;
577         break;
578     }
579     var_Set( p_aout, "audio-device", val );
580
581     /* Test for SPDIF support */
582     if ( AOUT_FMT_NON_LINEAR( &p_aout->output.output ) )
583     {
584         if( CreateDSBuffer( p_aout, VLC_FOURCC('s','p','d','i'),
585                             p_aout->output.output.i_physical_channels,
586                             aout_FormatNbChannels( &p_aout->output.output ),
587                             p_aout->output.output.i_rate,
588                             AOUT_SPDIF_SIZE, true )
589             == VLC_SUCCESS )
590         {
591             msg_Dbg( p_aout, "device supports A/52 over S/PDIF" );
592             val.i_int = AOUT_VAR_SPDIF;
593             text.psz_string = N_("A/52 over S/PDIF");
594             var_Change( p_aout, "audio-device",
595                         VLC_VAR_ADDCHOICE, &val, &text );
596             if( config_GetInt( p_aout, "spdif" ) )
597                 var_Set( p_aout, "audio-device", val );
598         }
599     }
600
601     var_Change( p_aout, "audio-device", VLC_VAR_CHOICESCOUNT, &val, NULL );
602     if( val.i_int <= 0 )
603     {
604         /* Probe() has failed. */
605         var_Destroy( p_aout, "audio-device" );
606         return;
607     }
608
609     var_AddCallback( p_aout, "audio-device", aout_ChannelsRestart, NULL );
610
611     val.b_bool = true;
612     var_Set( p_aout, "intf-change", val );
613 }
614
615 /*****************************************************************************
616  * Play: we'll start playing the directsound buffer here because at least here
617  *       we know the first buffer has been put in the aout fifo and we also
618  *       know its date.
619  *****************************************************************************/
620 static void Play( aout_instance_t *p_aout )
621 {
622     if( !p_aout->output.p_sys->b_playing )
623     {
624         aout_buffer_t *p_buffer;
625         int i;
626
627         p_aout->output.p_sys->b_playing = 1;
628
629         /* get the playing date of the first aout buffer */
630         p_aout->output.p_sys->p_notif->start_date =
631             aout_FifoFirstDate( p_aout, &p_aout->output.fifo );
632
633         /* fill in the first samples */
634         for( i = 0; i < FRAMES_NUM; i++ )
635         {
636             p_buffer = aout_FifoPop( p_aout, &p_aout->output.fifo );
637             if( !p_buffer ) break;
638             FillBuffer( p_aout, i, p_buffer );
639         }
640
641         /* wake up the audio output thread */
642         SetEvent( p_aout->output.p_sys->p_notif->event );
643     }
644 }
645
646 /*****************************************************************************
647  * CloseAudio: close the audio device
648  *****************************************************************************/
649 static void CloseAudio( vlc_object_t *p_this )
650 {
651     aout_instance_t * p_aout = (aout_instance_t *)p_this;
652     aout_sys_t *p_sys = p_aout->output.p_sys;
653
654     msg_Dbg( p_aout, "closing audio device" );
655
656     /* kill the position notification thread, if any */
657     if( p_sys->p_notif )
658     {
659         vlc_object_detach( p_sys->p_notif );
660         vlc_object_kill( p_sys->p_notif );
661         /* wake up the audio thread if needed */
662         if( !p_sys->b_playing ) SetEvent( p_sys->p_notif->event );
663
664         vlc_thread_join( p_sys->p_notif );
665         vlc_object_release( p_sys->p_notif );
666     }
667
668     /* release the secondary buffer */
669     DestroyDSBuffer( p_aout );
670
671     /* finally release the DirectSound object */
672     if( p_sys->p_dsobject ) IDirectSound_Release( p_sys->p_dsobject );
673  
674     /* free DSOUND.DLL */
675     if( p_sys->hdsound_dll ) FreeLibrary( p_sys->hdsound_dll );
676
677     free( p_aout->output.p_sys->p_device_guid );
678     free( p_sys );
679 }
680
681 /*****************************************************************************
682  * CallBackDirectSoundEnum: callback to enumerate available devices
683  *****************************************************************************/
684 static int CALLBACK CallBackDirectSoundEnum( LPGUID p_guid, LPCSTR psz_desc,
685                                              LPCSTR psz_mod, LPVOID _p_aout )
686 {
687     aout_instance_t *p_aout = (aout_instance_t *)_p_aout;
688
689     msg_Dbg( p_aout, "found device: %s", psz_desc );
690
691     if( p_aout->output.p_sys->i_device_id == 0 && p_guid )
692     {
693         p_aout->output.p_sys->p_device_guid = malloc( sizeof( GUID ) );
694         *p_aout->output.p_sys->p_device_guid = *p_guid;
695         msg_Dbg( p_aout, "using device: %s", psz_desc );
696     }
697
698     p_aout->output.p_sys->i_device_id--;
699     return 1;
700 }
701
702 /*****************************************************************************
703  * InitDirectSound: handle all the gory details of DirectSound initialisation
704  *****************************************************************************/
705 static int InitDirectSound( aout_instance_t *p_aout )
706 {
707     HRESULT (WINAPI *OurDirectSoundCreate)(LPGUID, LPDIRECTSOUND *, LPUNKNOWN);
708     HRESULT (WINAPI *OurDirectSoundEnumerate)(LPDSENUMCALLBACK, LPVOID);
709
710     p_aout->output.p_sys->hdsound_dll = LoadLibrary("DSOUND.DLL");
711     if( p_aout->output.p_sys->hdsound_dll == NULL )
712     {
713         msg_Warn( p_aout, "cannot open DSOUND.DLL" );
714         goto error;
715     }
716
717     OurDirectSoundCreate = (void *)
718         GetProcAddress( p_aout->output.p_sys->hdsound_dll,
719                         "DirectSoundCreate" );
720     if( OurDirectSoundCreate == NULL )
721     {
722         msg_Warn( p_aout, "GetProcAddress FAILED" );
723         goto error;
724     }
725
726     /* Get DirectSoundEnumerate */
727     OurDirectSoundEnumerate = (void *)
728        GetProcAddress( p_aout->output.p_sys->hdsound_dll,
729                        "DirectSoundEnumerateA" );
730     if( OurDirectSoundEnumerate )
731     {
732         /* Attempt enumeration */
733         if( FAILED( OurDirectSoundEnumerate( CallBackDirectSoundEnum,
734                                              p_aout ) ) )
735         {
736             msg_Dbg( p_aout, "enumeration of DirectSound devices failed" );
737         }
738     }
739
740     /* Create the direct sound object */
741     if FAILED( OurDirectSoundCreate( p_aout->output.p_sys->p_device_guid,
742                                      &p_aout->output.p_sys->p_dsobject,
743                                      NULL ) )
744     {
745         msg_Warn( p_aout, "cannot create a direct sound device" );
746         goto error;
747     }
748
749     /* Set DirectSound Cooperative level, ie what control we want over Windows
750      * sound device. In our case, DSSCL_EXCLUSIVE means that we can modify the
751      * settings of the primary buffer, but also that only the sound of our
752      * application will be hearable when it will have the focus.
753      * !!! (this is not really working as intended yet because to set the
754      * cooperative level you need the window handle of your application, and
755      * I don't know of any easy way to get it. Especially since we might play
756      * sound without any video, and so what window handle should we use ???
757      * The hack for now is to use the Desktop window handle - it seems to be
758      * working */
759     if( IDirectSound_SetCooperativeLevel( p_aout->output.p_sys->p_dsobject,
760                                           GetDesktopWindow(),
761                                           DSSCL_EXCLUSIVE) )
762     {
763         msg_Warn( p_aout, "cannot set direct sound cooperative level" );
764     }
765
766     return VLC_SUCCESS;
767
768  error:
769     p_aout->output.p_sys->p_dsobject = NULL;
770     if( p_aout->output.p_sys->hdsound_dll )
771     {
772         FreeLibrary( p_aout->output.p_sys->hdsound_dll );
773         p_aout->output.p_sys->hdsound_dll = NULL;
774     }
775     return VLC_EGENERIC;
776
777 }
778
779 /*****************************************************************************
780  * CreateDSBuffer: Creates a direct sound buffer of the required format.
781  *****************************************************************************
782  * This function creates the buffer we'll use to play audio.
783  * In DirectSound there are two kinds of buffers:
784  * - the primary buffer: which is the actual buffer that the soundcard plays
785  * - the secondary buffer(s): these buffers are the one actually used by
786  *    applications and DirectSound takes care of mixing them into the primary.
787  *
788  * Once you create a secondary buffer, you cannot change its format anymore so
789  * you have to release the current one and create another.
790  *****************************************************************************/
791 static int CreateDSBuffer( aout_instance_t *p_aout, int i_format,
792                            int i_channels, int i_nb_channels, int i_rate,
793                            int i_bytes_per_frame, bool b_probe )
794 {
795     WAVEFORMATEXTENSIBLE waveformat;
796     DSBUFFERDESC         dsbdesc;
797     unsigned int         i;
798
799     /* First set the sound buffer format */
800     waveformat.dwChannelMask = 0;
801     for( i = 0; i < sizeof(pi_channels_src)/sizeof(uint32_t); i++ )
802     {
803         if( i_channels & pi_channels_src[i] )
804             waveformat.dwChannelMask |= pi_channels_in[i];
805     }
806
807     switch( i_format )
808     {
809     case VLC_FOURCC('s','p','d','i'):
810         i_nb_channels = 2;
811         /* To prevent channel re-ordering */
812         waveformat.dwChannelMask = SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT;
813         waveformat.Format.wBitsPerSample = 16;
814         waveformat.Samples.wValidBitsPerSample =
815             waveformat.Format.wBitsPerSample;
816         waveformat.Format.wFormatTag = WAVE_FORMAT_DOLBY_AC3_SPDIF;
817         waveformat.SubFormat = _KSDATAFORMAT_SUBTYPE_DOLBY_AC3_SPDIF;
818         break;
819
820     case VLC_FOURCC('f','l','3','2'):
821         waveformat.Format.wBitsPerSample = sizeof(float) * 8;
822         waveformat.Samples.wValidBitsPerSample =
823             waveformat.Format.wBitsPerSample;
824         waveformat.Format.wFormatTag = WAVE_FORMAT_IEEE_FLOAT;
825         waveformat.SubFormat = _KSDATAFORMAT_SUBTYPE_IEEE_FLOAT;
826         break;
827
828     case VLC_FOURCC('s','1','6','l'):
829         waveformat.Format.wBitsPerSample = 16;
830         waveformat.Samples.wValidBitsPerSample =
831             waveformat.Format.wBitsPerSample;
832         waveformat.Format.wFormatTag = WAVE_FORMAT_PCM;
833         waveformat.SubFormat = _KSDATAFORMAT_SUBTYPE_PCM;
834         break;
835     }
836
837     waveformat.Format.nChannels = i_nb_channels;
838     waveformat.Format.nSamplesPerSec = i_rate;
839     waveformat.Format.nBlockAlign =
840         waveformat.Format.wBitsPerSample / 8 * i_nb_channels;
841     waveformat.Format.nAvgBytesPerSec =
842         waveformat.Format.nSamplesPerSec * waveformat.Format.nBlockAlign;
843
844     p_aout->output.p_sys->i_bits_per_sample = waveformat.Format.wBitsPerSample;
845