Use var_TriggerCallback as appropriate
[vlc.git] / modules / audio_output / auhal.c
1 /*****************************************************************************
2  * auhal.c: AUHAL and Coreaudio output plugin
3  *****************************************************************************
4  * Copyright (C) 2005 the VideoLAN team
5  * $Id$
6  *
7  * Authors: Derk-Jan Hartman <hartman at videolan dot 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 #ifdef HAVE_CONFIG_H
28 # include "config.h"
29 #endif
30
31 #include <unistd.h>
32
33 #include <vlc_common.h>
34 #include <vlc_plugin.h>
35 #include <vlc_interface.h>
36 #include <vlc_aout.h>
37
38 #include <CoreAudio/CoreAudio.h>
39 #include <AudioUnit/AudioUnitProperties.h>
40 #include <AudioUnit/AudioUnitParameters.h>
41 #include <AudioUnit/AudioOutputUnit.h>
42 #include <AudioToolbox/AudioFormat.h>
43
44 #define STREAM_FORMAT_MSG( pre, sfm ) \
45     pre "[%ld][%4.4s][%ld][%ld][%ld][%ld][%ld][%ld]", \
46     (UInt32)sfm.mSampleRate, (char *)&sfm.mFormatID, \
47     sfm.mFormatFlags, sfm.mBytesPerPacket, \
48     sfm.mFramesPerPacket, sfm.mBytesPerFrame, \
49     sfm.mChannelsPerFrame, sfm.mBitsPerChannel
50
51 #define STREAM_FORMAT_MSG_FULL( pre, sfm ) \
52     pre ":\nsamplerate: [%ld]\nFormatID: [%4.4s]\nFormatFlags: [%ld]\nBypesPerPacket: [%ld]\nFramesPerPacket: [%ld]\nBytesPerFrame: [%ld]\nChannelsPerFrame: [%ld]\nBitsPerChannel[%ld]", \
53     (UInt32)sfm.mSampleRate, (char *)&sfm.mFormatID, \
54     sfm.mFormatFlags, sfm.mBytesPerPacket, \
55     sfm.mFramesPerPacket, sfm.mBytesPerFrame, \
56     sfm.mChannelsPerFrame, sfm.mBitsPerChannel
57
58 #define BUFSIZE 0xffffff
59 #define AOUT_VAR_SPDIF_FLAG 0xf00000
60
61 /*
62  * TODO:
63  * - clean up the debug info
64  * - clean up C99'isms
65  * - be better at changing stream setup or devices setup changes while playing.
66  * - fix 6.1 and 7.1
67  */
68
69 /*****************************************************************************
70  * aout_sys_t: private audio output method descriptor
71  *****************************************************************************
72  * This structure is part of the audio output thread descriptor.
73  * It describes the CoreAudio specific properties of an output thread.
74  *****************************************************************************/
75 struct aout_sys_t
76 {
77     AudioDeviceID               i_default_dev;  /* Keeps DeviceID of defaultOutputDevice */
78     AudioDeviceID               i_selected_dev; /* Keeps DeviceID of the selected device */
79     UInt32                      i_devices;      /* Number of CoreAudio Devices */
80     bool                  b_supports_digital;/* Does the currently selected device support digital mode? */
81     bool                  b_digital;      /* Are we running in digital mode? */
82     mtime_t                     clock_diff;     /* Difference between VLC clock and Device clock */
83
84     /* AUHAL specific */
85     Component                   au_component;   /* The Audiocomponent we use */
86     AudioUnit                   au_unit;        /* The AudioUnit we use */
87     uint8_t                     p_remainder_buffer[BUFSIZE];
88     uint32_t                    i_read_bytes;
89     uint32_t                    i_total_bytes;
90
91     /* CoreAudio SPDIF mode specific */
92     pid_t                       i_hog_pid;      /* The keep the pid of our hog status */
93     AudioStreamID               i_stream_id;    /* The StreamID that has a cac3 streamformat */
94     int                         i_stream_index; /* The index of i_stream_id in an AudioBufferList */
95     AudioStreamBasicDescription stream_format;  /* The format we changed the stream to */
96     AudioStreamBasicDescription sfmt_revert;    /* The original format of the stream */
97     bool                  b_revert;       /* Wether we need to revert the stream format */
98     bool                  b_changed_mixing;/* Wether we need to set the mixing mode back */
99 };
100
101 /*****************************************************************************
102  * Local prototypes.
103  *****************************************************************************/
104 static int      Open                    ( vlc_object_t * );
105 static int      OpenAnalog              ( aout_instance_t * );
106 static int      OpenSPDIF               ( aout_instance_t * );
107 static void     Close                   ( vlc_object_t * );
108
109 static void     Play                    ( aout_instance_t * );
110 static void     Probe                   ( aout_instance_t * );
111
112 static int      AudioDeviceHasOutput    ( AudioDeviceID );
113 static int      AudioDeviceSupportsDigital( aout_instance_t *, AudioDeviceID );
114 static int      AudioStreamSupportsDigital( aout_instance_t *, AudioStreamID );
115 static int      AudioStreamChangeFormat ( aout_instance_t *, AudioStreamID, AudioStreamBasicDescription );
116
117 static OSStatus RenderCallbackAnalog    ( vlc_object_t *, AudioUnitRenderActionFlags *, const AudioTimeStamp *,
118                                           unsigned int, unsigned int, AudioBufferList *);
119 static OSStatus RenderCallbackSPDIF     ( AudioDeviceID, const AudioTimeStamp *, const void *, const AudioTimeStamp *,
120                                           AudioBufferList *, const AudioTimeStamp *, void * );
121 static OSStatus HardwareListener        ( AudioHardwarePropertyID, void *);
122 static OSStatus StreamListener          ( AudioStreamID, UInt32,
123                                           AudioDevicePropertyID, void * );
124 static int      AudioDeviceCallback     ( vlc_object_t *, const char *,
125                                           vlc_value_t, vlc_value_t, void * );
126
127
128 /*****************************************************************************
129  * Module descriptor
130  *****************************************************************************/
131 #define ADEV_TEXT N_("Audio Device")
132 #define ADEV_LONGTEXT N_("Choose a number corresponding to the number of an " \
133     "audio device, as listed in your 'Audio Device' menu. This device will " \
134     "then be used by default for audio playback.")
135
136 vlc_module_begin ()
137     set_shortname( "auhal" )
138     set_description( N_("HAL AudioUnit output") )
139     set_capability( "audio output", 101 )
140     set_category( CAT_AUDIO )
141     set_subcategory( SUBCAT_AUDIO_AOUT )
142     set_callbacks( Open, Close )
143     add_integer( "macosx-audio-device", 0, NULL, ADEV_TEXT, ADEV_LONGTEXT, false )
144 vlc_module_end ()
145
146 /*****************************************************************************
147  * Open: open macosx audio output
148  *****************************************************************************/
149 static int Open( vlc_object_t * p_this )
150 {
151     OSStatus                err = noErr;
152     UInt32                  i_param_size = 0;
153     struct aout_sys_t       *p_sys = NULL;
154     vlc_value_t             val;
155     aout_instance_t         *p_aout = (aout_instance_t *)p_this;
156
157     /* Use int here, to match kAudioDevicePropertyDeviceIsAlive
158      * property size */
159     int                     b_alive = false; 
160
161     /* Allocate structure */
162     p_aout->output.p_sys = malloc( sizeof( aout_sys_t ) );
163     if( p_aout->output.p_sys == NULL )
164         return VLC_ENOMEM;
165
166     p_sys = p_aout->output.p_sys;
167     p_sys->i_default_dev = 0;
168     p_sys->i_selected_dev = 0;
169     p_sys->i_devices = 0;
170     p_sys->b_supports_digital = false;
171     p_sys->b_digital = false;
172     p_sys->au_component = NULL;
173     p_sys->au_unit = NULL;
174     p_sys->clock_diff = (mtime_t) 0;
175     p_sys->i_read_bytes = 0;
176     p_sys->i_total_bytes = 0;
177     p_sys->i_hog_pid = -1;
178     p_sys->i_stream_id = 0;
179     p_sys->i_stream_index = -1;
180     p_sys->b_revert = false;
181     p_sys->b_changed_mixing = false;
182     memset( p_sys->p_remainder_buffer, 0, sizeof(uint8_t) * BUFSIZE );
183
184     p_aout->output.pf_play = Play;
185  
186     aout_FormatPrint( p_aout, "VLC is looking for:", (audio_sample_format_t *)&p_aout->output.output );
187  
188     /* Persistent device variable */
189     if( var_Type( p_aout->p_libvlc, "macosx-audio-device" ) == 0 )
190     {
191         var_Create( p_aout->p_libvlc, "macosx-audio-device", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
192     }
193
194     /* Build a list of devices */
195     if( var_Type( p_aout, "audio-device" ) == 0 )
196     {
197         Probe( p_aout );
198     }
199
200     /* What device do we want? */
201     if( var_Get( p_aout, "audio-device", &val ) < 0 )
202     {
203         msg_Err( p_aout, "audio-device var does not exist. device probe failed." );
204         goto error;
205     }
206
207     p_sys->i_selected_dev = val.i_int & ~AOUT_VAR_SPDIF_FLAG; /* remove SPDIF flag to get the true DeviceID */
208     p_sys->b_supports_digital = ( val.i_int & AOUT_VAR_SPDIF_FLAG ) ? true : false;
209
210     /* Check if the desired device is alive and usable */
211     /* TODO: add a callback to the device to alert us if the device dies */
212     i_param_size = sizeof( b_alive );
213     err = AudioDeviceGetProperty( p_sys->i_selected_dev, 0, FALSE,
214                                   kAudioDevicePropertyDeviceIsAlive,
215                                   &i_param_size, &b_alive );
216
217     if( err != noErr )
218     {
219         /* Be tolerant, only give a warning here */
220         msg_Warn( p_aout, "could not check whether device [0x%x] is alive: %4.4s", (unsigned int)p_sys->i_selected_dev, (char *)&err );
221         b_alive = false;
222     }
223
224     if( b_alive == false )
225     {
226         msg_Warn( p_aout, "selected audio device is not alive, switching to default device" );
227         p_sys->i_selected_dev = p_sys->i_default_dev;
228     }
229
230     i_param_size = sizeof( p_sys->i_hog_pid );
231     err = AudioDeviceGetProperty( p_sys->i_selected_dev, 0, FALSE,
232                                   kAudioDevicePropertyHogMode,
233                                   &i_param_size, &p_sys->i_hog_pid );
234
235     if( err != noErr )
236     {
237         /* This is not a fatal error. Some drivers simply don't support this property */
238         msg_Warn( p_aout, "could not check whether device is hogged: %4.4s",
239                  (char *)&err );
240         p_sys->i_hog_pid = -1;
241     }
242
243     if( p_sys->i_hog_pid != -1 && p_sys->i_hog_pid != getpid() )
244     {
245         msg_Err( p_aout, "Selected audio device is exclusively in use by another program." );
246         intf_UserFatal( p_aout, false, _("Audio output failed"),
247                         _("The selected audio output device is exclusively in "
248                           "use by another program.") );
249         goto error;
250     }
251
252     /* Check for Digital mode or Analog output mode */
253     if( AOUT_FMT_NON_LINEAR( &p_aout->output.output ) && p_sys->b_supports_digital )
254     {
255         if( OpenSPDIF( p_aout ) )
256             return VLC_SUCCESS;
257     }
258     else
259     {
260         if( OpenAnalog( p_aout ) )
261             return VLC_SUCCESS;
262     }
263
264 error:
265     /* If we reach this, this aout has failed */
266     var_Destroy( p_aout, "audio-device" );
267     free( p_sys );
268     return VLC_EGENERIC;
269 }
270
271 /*****************************************************************************
272  * Open: open and setup a HAL AudioUnit to do analog (multichannel) audio output
273  *****************************************************************************/
274 static int OpenAnalog( aout_instance_t *p_aout )
275 {
276     struct aout_sys_t           *p_sys = p_aout->output.p_sys;
277     OSStatus                    err = noErr;
278     UInt32                      i_param_size = 0, i = 0;
279     int                         i_original;
280     ComponentDescription        desc;
281     AudioStreamBasicDescription DeviceFormat;
282     AudioChannelLayout          *layout;
283     AudioChannelLayout          new_layout;
284     AURenderCallbackStruct      input;
285
286     /* Lets go find our Component */
287     desc.componentType = kAudioUnitType_Output;
288     desc.componentSubType = kAudioUnitSubType_HALOutput;
289     desc.componentManufacturer = kAudioUnitManufacturer_Apple;
290     desc.componentFlags = 0;
291     desc.componentFlagsMask = 0;
292
293     p_sys->au_component = FindNextComponent( NULL, &desc );
294     if( p_sys->au_component == NULL )
295     {
296         msg_Warn( p_aout, "we cannot find our HAL component" );
297         return false;
298     }
299
300     err = OpenAComponent( p_sys->au_component, &p_sys->au_unit );
301     if( err != noErr )
302     {
303         msg_Warn( p_aout, "we cannot open our HAL component" );
304         return false;
305     }
306  
307     /* Set the device we will use for this output unit */
308     err = AudioUnitSetProperty( p_sys->au_unit,
309                          kAudioOutputUnitProperty_CurrentDevice,
310                          kAudioUnitScope_Global,
311                          0,
312                          &p_sys->i_selected_dev,
313                          sizeof( AudioDeviceID ));
314  
315     if( err != noErr )
316     {
317         msg_Warn( p_aout, "we cannot select the audio device" );
318         return false;
319     }
320  
321     /* Get the current format */
322     i_param_size = sizeof(AudioStreamBasicDescription);
323
324     err = AudioUnitGetProperty( p_sys->au_unit,
325                                    kAudioUnitProperty_StreamFormat,
326                                    kAudioUnitScope_Input,
327                                    0,
328                                    &DeviceFormat,
329                                    &i_param_size );
330  
331     if( err != noErr ) return false;
332     else msg_Dbg( p_aout, STREAM_FORMAT_MSG( "current format is: ", DeviceFormat ) );
333
334     /* Get the channel layout of the device side of the unit (vlc -> unit -> device) */
335     err = AudioUnitGetPropertyInfo( p_sys->au_unit,
336                                    kAudioDevicePropertyPreferredChannelLayout,
337                                    kAudioUnitScope_Output,
338                                    0,
339                                    &i_param_size,
340                                    NULL );
341
342     if( err == noErr )
343     {
344         layout = (AudioChannelLayout *)malloc( i_param_size);
345
346         verify_noerr( AudioUnitGetProperty( p_sys->au_unit,
347                                        kAudioDevicePropertyPreferredChannelLayout,
348                                        kAudioUnitScope_Output,
349                                        0,
350                                        layout,
351                                        &i_param_size ));
352  
353         /* We need to "fill out" the ChannelLayout, because there are multiple ways that it can be set */
354         if( layout->mChannelLayoutTag == kAudioChannelLayoutTag_UseChannelBitmap)
355         {
356             /* bitmap defined channellayout */
357             verify_noerr( AudioFormatGetProperty( kAudioFormatProperty_ChannelLayoutForBitmap,
358                                     sizeof( UInt32), &layout->mChannelBitmap,
359                                     &i_param_size,
360                                     layout ));
361         }
362         else if( layout->mChannelLayoutTag != kAudioChannelLayoutTag_UseChannelDescriptions )
363         {
364             /* layouttags defined channellayout */
365             verify_noerr( AudioFormatGetProperty( kAudioFormatProperty_ChannelLayoutForTag,
366                                     sizeof( AudioChannelLayoutTag ), &layout->mChannelLayoutTag,
367                                     &i_param_size,
368                                     layout ));
369         }
370
371         msg_Dbg( p_aout, "layout of AUHAL has %d channels" , (int)layout->mNumberChannelDescriptions );
372  
373         /* Initialize the VLC core channel count */
374         p_aout->output.output.i_physical_channels = 0;
375         i_original = p_aout->output.output.i_original_channels & AOUT_CHAN_PHYSMASK;
376  
377         if( i_original == AOUT_CHAN_CENTER || layout->mNumberChannelDescriptions < 2 )
378         {
379             /* We only need Mono or cannot output more than 1 channel */
380             p_aout->output.output.i_physical_channels = AOUT_CHAN_CENTER;
381         }
382         else if( i_original == (AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT) || layout->mNumberChannelDescriptions < 3 )
383         {
384             /* We only need Stereo or cannot output more than 2 channels */
385             p_aout->output.output.i_physical_channels = AOUT_CHAN_RIGHT | AOUT_CHAN_LEFT;
386         }
387         else
388         {
389             /* We want more than stereo and we can do that */
390             for( i = 0; i < layout->mNumberChannelDescriptions; i++ )
391             {
392                 msg_Dbg( p_aout, "this is channel: %d", (int)layout->mChannelDescriptions[i].mChannelLabel );
393
394                 switch( layout->mChannelDescriptions[i].mChannelLabel )
395                 {
396                     case kAudioChannelLabel_Left:
397                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_LEFT;
398                         continue;
399                     case kAudioChannelLabel_Right:
400                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_RIGHT;
401                         continue;
402                     case kAudioChannelLabel_Center:
403                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_CENTER;
404                         continue;
405                     case kAudioChannelLabel_LFEScreen:
406                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_LFE;
407                         continue;
408                     case kAudioChannelLabel_LeftSurround:
409                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_REARLEFT;
410                         continue;
411                     case kAudioChannelLabel_RightSurround:
412                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_REARRIGHT;
413                         continue;
414                     case kAudioChannelLabel_RearSurroundLeft:
415                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_MIDDLELEFT;
416                         continue;
417                     case kAudioChannelLabel_RearSurroundRight:
418                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_MIDDLERIGHT;
419                         continue;
420                     case kAudioChannelLabel_CenterSurround:
421                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_REARCENTER;
422                         continue;
423                     default:
424                         msg_Warn( p_aout, "unrecognized channel form provided by driver: %d", (int)layout->mChannelDescriptions[i].mChannelLabel );
425                 }
426             }
427             if( p_aout->output.output.i_physical_channels == 0 )
428             {
429                 p_aout->output.output.i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
430                 msg_Err( p_aout, "You should configure your speaker layout with Audio Midi Setup Utility in /Applications/Utilities. Now using Stereo mode." );
431                 intf_UserFatal( p_aout, false, _("Audio device is not configured"),
432                                 _("You should configure your speaker layout with "
433                                   "the \"Audio Midi Setup\" utility in /Applications/"
434                                   "Utilities. Stereo mode is being used now.") );
435             }
436         }
437         free( layout );
438     }
439     else
440     {
441         msg_Warn( p_aout, "this driver does not support kAudioDevicePropertyPreferredChannelLayout. BAD DRIVER AUTHOR !!!" );
442         p_aout->output.output.i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
443     }
444
445     msg_Dbg( p_aout, "selected %d physical channels for device output", aout_FormatNbChannels( &p_aout->output.output ) );
446     msg_Dbg( p_aout, "VLC will output: %s", aout_FormatPrintChannels( &p_aout->output.output ));
447
448     memset (&new_layout, 0, sizeof(new_layout));
449     switch( aout_FormatNbChannels( &p_aout->output.output ) )
450     {
451         case 1:
452             new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_Mono;
453             break;
454         case 2:
455             new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_Stereo;
456             break;
457         case 3:
458             if( p_aout->output.output.i_physical_channels & AOUT_CHAN_CENTER )
459             {
460                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_7; // L R C
461             }
462             else if( p_aout->output.output.i_physical_channels & AOUT_CHAN_LFE )
463             {
464                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_4; // L R LFE
465             }
466             break;
467         case 4:
468             if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_CENTER | AOUT_CHAN_LFE ) )
469             {
470                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_10; // L R C LFE
471             }
472             else if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT ) )
473             {
474                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_3; // L R Ls Rs
475             }
476             else if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_CENTER | AOUT_CHAN_REARCENTER ) )
477             {
478                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_3; // L R C Cs
479             }
480             break;
481         case 5:
482             if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_CENTER ) )
483             {
484                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_19; // L R Ls Rs C
485             }
486             else if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_LFE ) )
487             {
488                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_18; // L R Ls Rs LFE
489             }
490             break;
491         case 6:
492             if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_LFE ) )
493             {
494                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_20; // L R Ls Rs C LFE
495             }
496             else
497             {
498                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_AudioUnit_6_0; // L R Ls Rs C Cs
499             }
500             break;
501         case 7:
502             /* FIXME: This is incorrect. VLC uses the internal ordering: L R Lm Rm Lr Rr C LFE but this is wrong */
503             new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_MPEG_6_1_A; // L R C LFE Ls Rs Cs
504             break;
505         case 8:
506             /* FIXME: This is incorrect. VLC uses the internal ordering: L R Lm Rm Lr Rr C LFE but this is wrong */
507             new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_MPEG_7_1_A; // L R C LFE Ls Rs Lc Rc
508             break;
509     }
510
511     /* Set up the format to be used */
512     DeviceFormat.mSampleRate = p_aout->output.output.i_rate;
513     DeviceFormat.mFormatID = kAudioFormatLinearPCM;
514
515     /* We use float 32. It's the best supported format by both VLC and Coreaudio */
516     p_aout->output.output.i_format = VLC_FOURCC( 'f','l','3','2');
517     DeviceFormat.mFormatFlags = kAudioFormatFlagsNativeFloatPacked;
518     DeviceFormat.mBitsPerChannel = 32;
519     DeviceFormat.mChannelsPerFrame = aout_FormatNbChannels( &p_aout->output.output );
520  
521     /* Calculate framesizes and stuff */
522     DeviceFormat.mFramesPerPacket = 1;
523     DeviceFormat.mBytesPerFrame = DeviceFormat.mBitsPerChannel * DeviceFormat.mChannelsPerFrame / 8;
524     DeviceFormat.mBytesPerPacket = DeviceFormat.mBytesPerFrame * DeviceFormat.mFramesPerPacket;
525  
526     /* Set the desired format */
527     i_param_size = sizeof(AudioStreamBasicDescription);
528     verify_noerr( AudioUnitSetProperty( p_sys->au_unit,
529                                    kAudioUnitProperty_StreamFormat,
530                                    kAudioUnitScope_Input,
531                                    0,
532                                    &DeviceFormat,
533                                    i_param_size ));
534  
535     msg_Dbg( p_aout, STREAM_FORMAT_MSG( "we set the AU format: " , DeviceFormat ) );
536  
537     /* Retrieve actual format */
538     verify_noerr( AudioUnitGetProperty( p_sys->au_unit,
539                                    kAudioUnitProperty_StreamFormat,
540                                    kAudioUnitScope_Input,
541                                    0,
542                                    &DeviceFormat,
543                                    &i_param_size ));
544  
545     msg_Dbg( p_aout, STREAM_FORMAT_MSG( "the actual set AU format is " , DeviceFormat ) );
546
547     /* Do the last VLC aout setups */
548     aout_FormatPrepare( &p_aout->output.output );
549     p_aout->output.i_nb_samples = 2048;
550     aout_VolumeSoftInit( p_aout );
551
552     /* set the IOproc callback */
553     input.inputProc = (AURenderCallback) RenderCallbackAnalog;
554     input.inputProcRefCon = p_aout;
555  
556     verify_noerr( AudioUnitSetProperty( p_sys->au_unit,
557                             kAudioUnitProperty_SetRenderCallback,
558                             kAudioUnitScope_Input,
559                             0, &input, sizeof( input ) ) );
560
561     input.inputProc = (AURenderCallback) RenderCallbackAnalog;
562     input.inputProcRefCon = p_aout;
563  
564     /* Set the new_layout as the layout VLC will use to feed the AU unit */
565     verify_noerr( AudioUnitSetProperty( p_sys->au_unit,
566                             kAudioUnitProperty_AudioChannelLayout,
567                             kAudioUnitScope_Input,
568                             0, &new_layout, sizeof(new_layout) ) );
569  
570     if( new_layout.mNumberChannelDescriptions > 0 )
571         free( new_layout.mChannelDescriptions );
572  
573     /* AU initiliaze */
574     verify_noerr( AudioUnitInitialize(p_sys->au_unit) );
575
576     /* Find the difference between device clock and mdate clock */
577     p_sys->clock_diff = - (mtime_t)
578         AudioConvertHostTimeToNanos( AudioGetCurrentHostTime() ) / 1000;
579     p_sys->clock_diff += mdate();
580
581     /* Start the AU */
582     verify_noerr( AudioOutputUnitStart(p_sys->au_unit) );
583  
584     return true;
585 }
586
587 /*****************************************************************************
588  * Setup a encoded digital stream (SPDIF)
589  *****************************************************************************/
590 static int OpenSPDIF( aout_instance_t * p_aout )
591 {
592     struct aout_sys_t       *p_sys = p_aout->output.p_sys;
593     OSStatus                err = noErr;
594     UInt32                  i_param_size = 0, b_mix = 0;
595     Boolean                 b_writeable = false;
596     AudioStreamID           *p_streams = NULL;
597     int                     i = 0, i_streams = 0;
598
599     /* Start doing the SPDIF setup proces */
600     p_sys->b_digital = true;
601
602     /* Hog the device */
603     i_param_size = sizeof( p_sys->i_hog_pid );
604     p_sys->i_hog_pid = getpid() ;
605  
606     err = AudioDeviceSetProperty( p_sys->i_selected_dev, 0, 0, FALSE,
607                                   kAudioDevicePropertyHogMode, i_param_size, &p_sys->i_hog_pid );
608  
609     if( err != noErr )
610     {
611         msg_Err( p_aout, "failed to set hogmode: [%4.4s]", (char *)&err );
612         return false;
613     }
614
615     /* Set mixable to false if we are allowed to */
616     err = AudioDeviceGetPropertyInfo( p_sys->i_selected_dev, 0, FALSE, kAudioDevicePropertySupportsMixing,
617                                     &i_param_size, &b_writeable );
618
619     err = AudioDeviceGetProperty( p_sys->i_selected_dev, 0, FALSE, kAudioDevicePropertySupportsMixing,
620                                     &i_param_size, &b_mix );
621  
622     if( !err && b_writeable )
623     {
624         b_mix = 0;
625         err = AudioDeviceSetProperty( p_sys->i_selected_dev, 0, 0, FALSE,
626                             kAudioDevicePropertySupportsMixing, i_param_size, &b_mix );
627         p_sys->b_changed_mixing = true;
628     }
629  
630     if( err != noErr )
631     {
632         msg_Err( p_aout, "failed to set mixmode: [%4.4s]", (char *)&err );
633         return false;
634     }
635
636     /* Get a list of all the streams on this device */
637     err = AudioDeviceGetPropertyInfo( p_sys->i_selected_dev, 0, FALSE,
638                                       kAudioDevicePropertyStreams,
639                                       &i_param_size, NULL );
640     if( err != noErr )
641     {
642         msg_Err( p_aout, "could not get number of streams: [%4.4s]", (char *)&err );
643         return false;
644     }
645  
646     i_streams = i_param_size / sizeof( AudioStreamID );
647     p_streams = (AudioStreamID *)malloc( i_param_size );
648     if( p_streams == NULL )
649         return false;
650  
651     err = AudioDeviceGetProperty( p_sys->i_selected_dev, 0, FALSE,
652                                     kAudioDevicePropertyStreams,
653                                     &i_param_size, p_streams );
654  
655     if( err != noErr )
656     {
657         msg_Err( p_aout, "could not get number of streams: [%4.4s]", (char *)&err );
658         free( p_streams );
659         return false;
660     }
661
662     for( i = 0; i < i_streams && p_sys->i_stream_index < 0 ; i++ )
663     {
664         /* Find a stream with a cac3 stream */
665         AudioStreamBasicDescription *p_format_list = NULL;
666         int                         i_formats = 0, j = 0;
667         bool                  b_digital = false;
668  
669         /* Retrieve all the stream formats supported by each output stream */
670         err = AudioStreamGetPropertyInfo( p_streams[i], 0,
671                                           kAudioStreamPropertyPhysicalFormats,
672                                           &i_param_size, NULL );
673         if( err != noErr )
674         {
675             msg_Err( p_aout, "could not get number of streamformats: [%4.4s]", (char *)&err );
676             continue;
677         }
678  
679         i_formats = i_param_size / sizeof( AudioStreamBasicDescription );
680         p_format_list = (AudioStreamBasicDescription *)malloc( i_param_size );
681         if( p_format_list == NULL )
682             continue;
683  
684         err = AudioStreamGetProperty( p_streams[i], 0,
685                                           kAudioStreamPropertyPhysicalFormats,
686                                           &i_param_size, p_format_list );
687         if( err != noErr )
688         {
689             msg_Err( p_aout, "could not get the list of streamformats: [%4.4s]", (char *)&err );
690             free( p_format_list );
691             continue;
692         }
693
694         /* Check if one of the supported formats is a digital format */
695         for( j = 0; j < i_formats; j++ )
696         {
697             if( p_format_list[j].mFormatID == 'IAC3' ||
698                   p_format_list[j].mFormatID == kAudioFormat60958AC3 )
699             {
700                 b_digital = true;
701                 break;
702             }
703         }
704  
705         if( b_digital )
706         {
707             /* if this stream supports a digital (cac3) format, then go set it. */
708             int i_requested_rate_format = -1;
709             int i_current_rate_format = -1;
710             int i_backup_rate_format = -1;
711
712             p_sys->i_stream_id = p_streams[i];
713             p_sys->i_stream_index = i;
714
715             if( p_sys->b_revert == false )
716             {
717                 /* Retrieve the original format of this stream first if not done so already */
718                 i_param_size = sizeof( p_sys->sfmt_revert );
719                 err = AudioStreamGetProperty( p_sys->i_stream_id, 0,
720                                               kAudioStreamPropertyPhysicalFormat,
721                                               &i_param_size,
722                                               &p_sys->sfmt_revert );
723                 if( err != noErr )
724                 {
725                     msg_Err( p_aout, "could not retrieve the original streamformat: [%4.4s]", (char *)&err );
726                     continue;
727                 }
728                 p_sys->b_revert = true;
729             }
730
731             for( j = 0; j < i_formats; j++ )
732             {
733                 if( p_format_list[j].mFormatID == 'IAC3' ||
734                       p_format_list[j].mFormatID == kAudioFormat60958AC3 )
735                 {
736                     if( p_format_list[j].mSampleRate == p_aout->output.output.i_rate )
737                     {
738                         i_requested_rate_format = j;
739                         break;
740                     }
741                     else if( p_format_list[j].mSampleRate == p_sys->sfmt_revert.mSampleRate )
742                     {
743                         i_current_rate_format = j;
744                     }
745                     else
746                     {
747                         if( i_backup_rate_format < 0 || p_format_list[j].mSampleRate > p_format_list[i_backup_rate_format].mSampleRate )
748                             i_backup_rate_format = j;
749                     }
750                 }
751  
752             }
753  
754             if( i_requested_rate_format >= 0 ) /* We prefer to output at the samplerate of the original audio */
755                 p_sys->stream_format = p_format_list[i_requested_rate_format];
756             else if( i_current_rate_format >= 0 ) /* If not possible, we will try to use the current samplerate of the device */
757                 p_sys->stream_format = p_format_list[i_current_rate_format];
758             else p_sys->stream_format = p_format_list[i_backup_rate_format]; /* And if we have to, any digital format will be just fine (highest rate possible) */
759         }
760         free( p_format_list );
761     }
762     free( p_streams );
763
764     msg_Dbg( p_aout, STREAM_FORMAT_MSG( "original stream format: ", p_sys->sfmt_revert ) );
765
766     if( !AudioStreamChangeFormat( p_aout, p_sys->i_stream_id, p_sys->stream_format ) )
767         return false;
768
769     /* Set the format flags */
770     if( p_sys->stream_format.mFormatFlags & kAudioFormatFlagIsBigEndian )
771         p_aout->output.output.i_format = VLC_FOURCC('s','p','d','b');
772     else
773         p_aout->output.output.i_format = VLC_FOURCC('s','p','d','i');
774     p_aout->output.output.i_bytes_per_frame = AOUT_SPDIF_SIZE;
775     p_aout->output.output.i_frame_length = A52_FRAME_NB;
776     p_aout->output.i_nb_samples = p_aout->output.output.i_frame_length;
777     p_aout->output.output.i_rate = (unsigned int)p_sys->stream_format.mSampleRate;
778     aout_FormatPrepare( &p_aout->output.output );
779     aout_VolumeNoneInit( p_aout );
780
781     /* Add IOProc callback */
782     err = AudioDeviceAddIOProc( p_sys->i_selected_dev,
783                                (AudioDeviceIOProc)RenderCallbackSPDIF,
784                                (void *)p_aout );
785
786     if( err != noErr )
787     {
788         msg_Err( p_aout, "AudioDeviceAddIOProc failed: [%4.4s]", (char *)&err );
789         return false;
790     }
791
792     /* Check for the difference between the Device clock and mdate */
793     p_sys->clock_diff = - (mtime_t)
794         AudioConvertHostTimeToNanos( AudioGetCurrentHostTime() ) / 1000;
795     p_sys->clock_diff += mdate();
796  
797     /* Start device */
798     err = AudioDeviceStart( p_sys->i_selected_dev, (AudioDeviceIOProc)RenderCallbackSPDIF );
799     if( err != noErr )
800     {
801         msg_Err( p_aout, "AudioDeviceStart failed: [%4.4s]", (char *)&err );
802
803         err = AudioDeviceRemoveIOProc( p_sys->i_selected_dev,
804                                      (AudioDeviceIOProc)RenderCallbackSPDIF );
805         if( err != noErr )
806         {
807             msg_Err( p_aout, "AudioDeviceRemoveIOProc failed: [%4.4s]", (char *)&err );
808         }
809         return false;
810     }
811
812     return true;
813 }
814
815
816 /*****************************************************************************
817  * Close: Close HAL AudioUnit
818  *****************************************************************************/
819 static void Close( vlc_object_t * p_this )
820 {
821     aout_instance_t     *p_aout = (aout_instance_t *)p_this;
822     struct aout_sys_t   *p_sys = p_aout->output.p_sys;
823     OSStatus            err = noErr;
824     UInt32              i_param_size = 0;
825  
826     if( p_sys->au_unit )
827     {
828         verify_noerr( AudioOutputUnitStop( p_sys->au_unit ) );
829         verify_noerr( AudioUnitUninitialize( p_sys->au_unit ) );
830         verify_noerr( CloseComponent( p_sys->au_unit ) );
831     }
832  
833     if( p_sys->b_digital )
834     {
835         /* Stop device */
836         err = AudioDeviceStop( p_sys->i_selected_dev,
837                                (AudioDeviceIOProc)RenderCallbackSPDIF );
838         if( err != noErr )
839         {
840             msg_Err( p_aout, "AudioDeviceStop failed: [%4.4s]", (char *)&err );
841         }
842
843         /* Remove IOProc callback */
844         err = AudioDeviceRemoveIOProc( p_sys->i_selected_dev,
845                                       (AudioDeviceIOProc)RenderCallbackSPDIF );
846         if( err != noErr )
847         {
848             msg_Err( p_aout, "AudioDeviceRemoveIOProc failed: [%4.4s]", (char *)&err );
849         }
850  
851         if( p_sys->b_revert )
852         {
853             AudioStreamChangeFormat( p_aout, p_sys->i_stream_id, p_sys->sfmt_revert );
854         }
855
856         if( p_sys->b_changed_mixing && p_sys->sfmt_revert.mFormatID != kAudioFormat60958AC3 )
857         {
858             int b_mix;
859             Boolean b_writeable;
860             /* Revert mixable to true if we are allowed to */
861             err = AudioDeviceGetPropertyInfo( p_sys->i_selected_dev, 0, FALSE, kAudioDevicePropertySupportsMixing,
862                                         &i_param_size, &b_writeable );
863
864             err = AudioDeviceGetProperty( p_sys->i_selected_dev, 0, FALSE, kAudioDevicePropertySupportsMixing,
865                                         &i_param_size, &b_mix );
866  
867             if( !err && b_writeable )
868             {
869                 msg_Dbg( p_aout, "mixable is: %d", b_mix );
870                 b_mix = 1;
871                 err = AudioDeviceSetProperty( p_sys->i_selected_dev, 0, 0, FALSE,
872                                     kAudioDevicePropertySupportsMixing, i_param_size, &b_mix );
873             }
874
875             if( err != noErr )
876             {
877                 msg_Err( p_aout, "failed to set mixmode: [%4.4s]", (char *)&err );
878             }
879         }
880     }
881
882     err = AudioHardwareRemovePropertyListener( kAudioHardwarePropertyDevices,
883                                                HardwareListener );
884  
885     if( err != noErr )
886     {
887         msg_Err( p_aout, "AudioHardwareRemovePropertyListener failed: [%4.4s]", (char *)&err );
888     }
889  
890     if( p_sys->i_hog_pid == getpid() )
891     {
892         p_sys->i_hog_pid = -1;
893         i_param_size = sizeof( p_sys->i_hog_pid );
894         err = AudioDeviceSetProperty( p_sys->i_selected_dev, 0, 0, FALSE,
895                                          kAudioDevicePropertyHogMode, i_param_size, &p_sys->i_hog_pid );
896         if( err != noErr ) msg_Err( p_aout, "Could not release hogmode: [%4.4s]", (char *)&err );
897     }
898  
899     free( p_sys );
900 }
901
902 /*****************************************************************************
903  * Play: nothing to do
904  *****************************************************************************/
905 static void Play( aout_instance_t * p_aout )
906 {
907 }
908
909
910 /*****************************************************************************
911  * Probe: Check which devices the OS has, and add them to our audio-device menu
912  *****************************************************************************/
913 static void Probe( aout_instance_t * p_aout )
914 {
915     OSStatus            err = noErr;
916     UInt32              i = 0, i_param_size = 0;
917     AudioDeviceID       devid_def = 0;
918     AudioDeviceID       *p_devices = NULL;
919     vlc_value_t         val, text;
920
921     struct aout_sys_t   *p_sys = p_aout->output.p_sys;
922
923     /* Get number of devices */
924     err = AudioHardwareGetPropertyInfo( kAudioHardwarePropertyDevices,
925                                         &i_param_size, NULL );
926     if( err != noErr )
927     {
928         msg_Err( p_aout, "Could not get number of devices: [%4.4s]", (char *)&err );
929         goto error;
930     }
931
932     p_sys->i_devices = i_param_size / sizeof( AudioDeviceID );
933
934     if( p_sys->i_devices < 1 )
935     {
936         msg_Err( p_aout, "No audio output devices were found." );
937         goto error;
938     }
939
940     msg_Dbg( p_aout, "system has [%ld] device(s)", p_sys->i_devices );
941
942     /* Allocate DeviceID array */
943     p_devices = (AudioDeviceID*)malloc( sizeof(AudioDeviceID) * p_sys->i_devices );
944     if( p_devices == NULL )
945         goto error;
946
947     /* Populate DeviceID array */
948     err = AudioHardwareGetProperty( kAudioHardwarePropertyDevices,
949                                     &i_param_size, p_devices );
950     if( err != noErr )
951     {
952         msg_Err( p_aout, "could not get the device IDs: [%4.4s]", (char *)&err );
953         goto error;
954     }
955
956     /* Find the ID of the default Device */
957     i_param_size = sizeof( AudioDeviceID );
958     err = AudioHardwareGetProperty( kAudioHardwarePropertyDefaultOutputDevice,
959                                     &i_param_size, &devid_def );
960     if( err != noErr )
961     {
962         msg_Err( p_aout, "could not get default audio device: [%4.4s]", (char *)&err );
963         goto error;
964     }
965     p_sys->i_default_dev = devid_def;
966  
967     var_Create( p_aout, "audio-device", VLC_VAR_INTEGER|VLC_VAR_HASCHOICE );
968     text.psz_string = (char*)_("Audio Device");
969     var_Change( p_aout, "audio-device", VLC_VAR_SETTEXT, &text, NULL );
970  
971     for( i = 0; i < p_sys->i_devices; i++ )
972     {
973         char *psz_name;
974         i_param_size = 0;
975
976         /* Retrieve the length of the device name */
977         err = AudioDeviceGetPropertyInfo(
978                     p_devices[i], 0, false,
979                     kAudioDevicePropertyDeviceName,
980                     &i_param_size, NULL);
981         if( err ) goto error;
982
983         /* Retrieve the name of the device */
984         psz_name = (char *)malloc( i_param_size );
985         err = AudioDeviceGetProperty(
986                     p_devices[i], 0, false,
987                     kAudioDevicePropertyDeviceName,
988                     &i_param_size, psz_name);
989         if( err ) goto error;
990
991         msg_Dbg( p_aout, "DevID: %#lx DevName: %s", p_devices[i], psz_name );
992
993         if( !AudioDeviceHasOutput( p_devices[i]) )
994         {
995             msg_Dbg( p_aout, "this device is INPUT only. skipping..." );
996             continue;
997         }
998
999         /* Add the menu entries */
1000         val.i_int = (int)p_devices[i];
1001         text.psz_string = psz_name;
1002         var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
1003         text.psz_string = NULL;
1004         if( p_sys->i_default_dev == p_devices[i] )
1005         {
1006             /* The default device is the selected device normally */
1007             var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
1008             var_Set( p_aout, "audio-device", val );
1009         }
1010
1011         if( AudioDeviceSupportsDigital( p_aout, p_devices[i] ) )
1012         {
1013             val.i_int = (int)p_devices[i] | AOUT_VAR_SPDIF_FLAG;
1014             if( asprintf( &text.psz_string, _("%s (Encoded Output)"), psz_name ) != -1 )
1015             {
1016                 var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
1017                 free( text.psz_string );
1018                 if( p_sys->i_default_dev == p_devices[i] && config_GetInt( p_aout, "spdif" ) )
1019                 {
1020                     /* We selected to prefer SPDIF output if available
1021                      * then this "dummy" entry should be selected */
1022                     var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
1023                     var_Set( p_aout, "audio-device", val );
1024                 }
1025             }
1026         }
1027  
1028         free( psz_name);
1029     }
1030  
1031     /* If a device is already "preselected", then use this device */
1032     var_Get( p_aout->p_libvlc, "macosx-audio-device", &val );
1033     if( val.i_int > 0 )
1034     {
1035         var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
1036         var_Set( p_aout, "audio-device", val );
1037     }
1038  
1039     /* If we change the device we want to use, we should renegotiate the audio chain */
1040     var_AddCallback( p_aout, "audio-device", AudioDeviceCallback, NULL );
1041
1042     /* Attach a Listener so that we are notified of a change in the Device setup */
1043     err = AudioHardwareAddPropertyListener( kAudioHardwarePropertyDevices,
1044                                             HardwareListener,
1045                                             (void *)p_aout );
1046     if( err )
1047         goto error;
1048
1049     free( p_devices );
1050     return;
1051
1052 error:
1053     var_Destroy( p_aout, "audio-device" );
1054     free( p_devices );
1055     return;
1056 }
1057
1058 /*****************************************************************************
1059  * AudioDeviceHasOutput: Checks if the Device actually provides any outputs at all
1060  *****************************************************************************/
1061 static int AudioDeviceHasOutput( AudioDeviceID i_dev_id )
1062 {
1063     UInt32            dataSize;
1064     Boolean            isWritable;
1065     
1066     verify_noerr( AudioDeviceGetPropertyInfo( i_dev_id, 0, FALSE, kAudioDevicePropertyStreams, &dataSize, &isWritable) );
1067     if (dataSize == 0) return FALSE;
1068  
1069     return TRUE;
1070 }
1071
1072 /*****************************************************************************
1073  * AudioDeviceSupportsDigital: Check i_dev_id for digital stream support.
1074  *****************************************************************************/
1075 static int AudioDeviceSupportsDigital( aout_instance_t *p_aout, AudioDeviceID i_dev_id )
1076 {
1077     OSStatus                    err = noErr;
1078     UInt32                      i_param_size = 0;
1079     AudioStreamID               *p_streams = NULL;
1080     int                         i = 0, i_streams = 0;
1081     bool                  b_return = false;
1082  
1083     /* Retrieve all the output streams */
1084     err = AudioDeviceGetPropertyInfo( i_dev_id, 0, FALSE,
1085                                       kAudioDevicePropertyStreams,
1086                                       &i_param_size, NULL );
1087     if( err != noErr )
1088     {
1089         msg_Err( p_aout, "could not get number of streams: [%4.4s]", (char *)&err );
1090         return false;
1091     }
1092  
1093     i_streams = i_param_size / sizeof( AudioStreamID );
1094     p_streams = (AudioStreamID *)malloc( i_param_size );
1095     if( p_streams == NULL )
1096         return VLC_ENOMEM;
1097  
1098     err = AudioDeviceGetProperty( i_dev_id, 0, FALSE,
1099                                     kAudioDevicePropertyStreams,
1100                                     &i_param_size, p_streams );
1101  
1102     if( err != noErr )
1103     {
1104         msg_Err( p_aout, "could not get number of streams: [%4.4s]", (char *)&err );
1105         return false;
1106     }
1107
1108     for( i = 0; i < i_streams; i++ )
1109     {
1110         if( AudioStreamSupportsDigital( p_aout, p_streams[i] ) )
1111             b_return = true;
1112     }
1113  
1114     free( p_streams );
1115     return b_return;
1116 }
1117
1118 /*****************************************************************************
1119  * AudioStreamSupportsDigital: Check i_stream_id for digital stream support.
1120  *****************************************************************************/
1121 static int AudioStreamSupportsDigital( aout_instance_t *p_aout, AudioStreamID i_stream_id )
1122 {
1123     OSStatus                    err = noErr;
1124     UInt32                      i_param_size = 0;
1125     AudioStreamBasicDescription *p_format_list = NULL;
1126     int                         i = 0, i_formats = 0;
1127     bool                  b_return = false;
1128  
1129     /* Retrieve all the stream formats supported by each output stream */
1130     err = AudioStreamGetPropertyInfo( i_stream_id, 0,
1131                                       kAudioStreamPropertyPhysicalFormats,
1132                                       &i_param_size, NULL );
1133     if( err != noErr )
1134     {
1135         msg_Err( p_aout, "could not get number of streamformats: [%4.4s]", (char *)&err );
1136         return false;
1137     }
1138  
1139     i_formats = i_param_size / sizeof( AudioStreamBasicDescription );
1140     p_format_list = (AudioStreamBasicDescription *)malloc( i_param_size );
1141     if( p_format_list == NULL )
1142         return false;
1143  
1144     err = AudioStreamGetProperty( i_stream_id, 0,
1145                                       kAudioStreamPropertyPhysicalFormats,
1146                                       &i_param_size, p_format_list );
1147     if( err != noErr )
1148     {
1149         msg_Err( p_aout, "could not get the list of streamformats: [%4.4s]", (char *)&err );
1150         free( p_format_list);
1151         p_format_list = NULL;
1152         return false;
1153     }
1154
1155     for( i = 0; i < i_formats; i++ )
1156     {
1157         msg_Dbg( p_aout, STREAM_FORMAT_MSG( "supported format: ", p_format_list[i] ) );
1158  
1159         if( p_format_list[i].mFormatID == 'IAC3' ||
1160                   p_format_list[i].mFormatID == kAudioFormat60958AC3 )
1161         {
1162             b_return = true;
1163         }
1164     }
1165  
1166     free( p_format_list );
1167     return b_return;
1168 }
1169
1170 /*****************************************************************************
1171  * AudioStreamChangeFormat: Change i_stream_id to change_format
1172  *****************************************************************************/
1173 static int AudioStreamChangeFormat( aout_instance_t *p_aout, AudioStreamID i_stream_id, AudioStreamBasicDescription change_format )
1174 {
1175     OSStatus            err = noErr;
1176     UInt32              i_param_size = 0;
1177     int i;
1178
1179     struct { vlc_mutex_t lock; vlc_cond_t cond; } w;
1180  
1181     msg_Dbg( p_aout, STREAM_FORMAT_MSG( "setting stream format: ", change_format ) );
1182
1183     /* Condition because SetProperty is asynchronious */
1184     vlc_cond_init( &w.cond );
1185     vlc_mutex_init( &w.lock );
1186     vlc_mutex_lock( &w.lock );
1187
1188     /* Install the callback */
1189     err = AudioStreamAddPropertyListener( i_stream_id, 0,
1190                                       kAudioStreamPropertyPhysicalFormat,
1191                                       StreamListener, (void *)&w );
1192     if( err != noErr )
1193     {
1194         msg_Err( p_aout, "AudioStreamAddPropertyListener failed: [%4.4s]", (char *)&err );
1195         return false;
1196     }
1197
1198     /* change the format */
1199     err = AudioStreamSetProperty( i_stream_id, 0, 0,
1200                                   kAudioStreamPropertyPhysicalFormat,
1201                                   sizeof( AudioStreamBasicDescription ),
1202                                   &change_format );
1203     if( err != noErr )
1204     {
1205         msg_Err( p_aout, "could not set the stream format: [%4.4s]", (char *)&err );
1206         return false;
1207     }
1208
1209     /* The AudioStreamSetProperty is not only asynchronious (requiring the locks)
1210      * it is also not atomic in its behaviour.
1211      * Therefore we check 5 times before we really give up.
1212      * FIXME: failing isn't actually implemented yet. */
1213     for( i = 0; i < 5; i++ )
1214     {
1215         AudioStreamBasicDescription actual_format;
1216         mtime_t timeout = mdate() + 500000;
1217
1218         if( vlc_cond_timedwait( &w.cond, &w.lock, timeout ) )
1219         {
1220             msg_Dbg( p_aout, "reached timeout" );
1221         }
1222
1223         i_param_size = sizeof( AudioStreamBasicDescription );
1224         err = AudioStreamGetProperty( i_stream_id, 0,
1225                                       kAudioStreamPropertyPhysicalFormat,
1226                                       &i_param_size,
1227                                       &actual_format );
1228
1229         msg_Dbg( p_aout, STREAM_FORMAT_MSG( "actual format in use: ", actual_format ) );
1230         if( actual_format.mSampleRate == change_format.mSampleRate &&
1231             actual_format.mFormatID == change_format.mFormatID &&
1232             actual_format.mFramesPerPacket == change_format.mFramesPerPacket )
1233         {
1234             /* The right format is now active */
1235             break;
1236         }
1237         /* We need to check again */
1238     }
1239  
1240     /* Removing the property listener */
1241     err = AudioStreamRemovePropertyListener( i_stream_id, 0,
1242                                             kAudioStreamPropertyPhysicalFormat,
1243                                             StreamListener );
1244     if( err != noErr )
1245     {
1246         msg_Err( p_aout, "AudioStreamRemovePropertyListener failed: [%4.4s]", (char *)&err );
1247         return false;
1248     }
1249  
1250     /* Destroy the lock and condition */
1251     vlc_mutex_unlock( &w.lock );
1252     vlc_mutex_destroy( &w.lock );
1253     vlc_cond_destroy( &w.cond );
1254  
1255     return true;
1256 }
1257
1258 /*****************************************************************************
1259  * RenderCallbackAnalog: This function is called everytime the AudioUnit wants
1260  * us to provide some more audio data.
1261  * Don't print anything during normal playback, calling blocking function from
1262  * this callback is not allowed.
1263  *****************************************************************************/
1264 static OSStatus RenderCallbackAnalog( vlc_object_t *_p_aout,
1265                                       AudioUnitRenderActionFlags *ioActionFlags,
1266                                       const AudioTimeStamp *inTimeStamp,
1267                                       unsigned int inBusNummer,
1268                                       unsigned int inNumberFrames,
1269                                       AudioBufferList *ioData )
1270 {
1271     AudioTimeStamp  host_time;
1272     mtime_t         current_date = 0;
1273     uint32_t        i_mData_bytes = 0;
1274
1275     aout_instance_t * p_aout = (aout_instance_t *)_p_aout;
1276     struct aout_sys_t * p_sys = p_aout->output.p_sys;
1277
1278     host_time.mFlags = kAudioTimeStampHostTimeValid;
1279     AudioDeviceTranslateTime( p_sys->i_selected_dev, inTimeStamp, &host_time );
1280
1281     /* Check for the difference between the Device clock and mdate */
1282     p_sys->clock_diff = - (mtime_t)
1283         AudioConvertHostTimeToNanos( AudioGetCurrentHostTime() ) / 1000;
1284     p_sys->clock_diff += mdate();
1285
1286     current_date = p_sys->clock_diff +
1287                    AudioConvertHostTimeToNanos( host_time.mHostTime ) / 1000;
1288                    //- ((mtime_t) 1000000 / p_aout->output.output.i_rate * 31 ); // 31 = Latency in Frames. retrieve somewhere
1289
1290     if( ioData == NULL && ioData->mNumberBuffers < 1 )
1291     {
1292         msg_Err( p_aout, "no iodata or buffers");
1293         return 0;
1294     }
1295     if( ioData->mNumberBuffers > 1 )
1296         msg_Err( p_aout, "well this is weird. seems like there is more than one buffer..." );
1297
1298
1299     if( p_sys->i_total_bytes > 0 )
1300     {
1301         i_mData_bytes = __MIN( p_sys->i_total_bytes - p_sys->i_read_bytes, ioData->mBuffers[0].mDataByteSize );
1302         vlc_memcpy( ioData->mBuffers[0].mData,
1303                     &p_sys->p_remainder_buffer[p_sys->i_read_bytes],
1304                     i_mData_bytes );
1305         p_sys->i_read_bytes += i_mData_bytes;
1306         current_date += (mtime_t) ( (mtime_t) 1000000 / p_aout->output.output.i_rate ) *
1307                         ( i_mData_bytes / 4 / aout_FormatNbChannels( &p_aout->output.output )  ); // 4 is fl32 specific
1308  
1309         if( p_sys->i_read_bytes >= p_sys->i_total_bytes )
1310             p_sys->i_read_bytes = p_sys->i_total_bytes = 0;
1311     }
1312  
1313     while( i_mData_bytes < ioData->mBuffers[0].mDataByteSize )
1314     {
1315         /* We don't have enough data yet */
1316         aout_buffer_t * p_buffer;
1317         p_buffer = aout_OutputNextBuffer( p_aout, current_date , false );
1318  
1319         if( p_buffer != NULL )
1320         {
1321             uint32_t i_second_mData_bytes = __MIN( p_buffer->i_nb_bytes, ioData->mBuffers[0].mDataByteSize - i_mData_bytes );
1322  
1323             vlc_memcpy( (uint8_t *)ioData->mBuffers[0].mData + i_mData_bytes,
1324                         p_buffer->p_buffer, i_second_mData_bytes );
1325             i_mData_bytes += i_second_mData_bytes;
1326
1327             if( i_mData_bytes >= ioData->mBuffers[0].mDataByteSize )
1328             {
1329                 p_sys->i_total_bytes = p_buffer->i_nb_bytes - i_second_mData_bytes;
1330                 vlc_memcpy( p_sys->p_remainder_buffer,
1331                             &p_buffer->p_buffer[i_second_mData_bytes],
1332                             p_sys->i_total_bytes );
1333             }
1334             else
1335             {
1336                 /* update current_date */
1337                 current_date += (mtime_t) ( (mtime_t) 1000000 / p_aout->output.output.i_rate ) *
1338                                 ( i_second_mData_bytes / 4 / aout_FormatNbChannels( &p_aout->output.output )  ); // 4 is fl32 specific
1339             }
1340             aout_BufferFree( p_buffer );
1341         }
1342         else
1343         {
1344              vlc_memset( (uint8_t *)ioData->mBuffers[0].mData +i_mData_bytes,
1345                          0,ioData->mBuffers[0].mDataByteSize - i_mData_bytes );
1346              i_mData_bytes += ioData->mBuffers[0].mDataByteSize - i_mData_bytes;
1347         }
1348     }
1349     return( noErr );
1350 }
1351
1352 /*****************************************************************************
1353  * RenderCallbackSPDIF: callback for SPDIF audio output
1354  *****************************************************************************/
1355 static OSStatus RenderCallbackSPDIF( AudioDeviceID inDevice,
1356                                     const AudioTimeStamp * inNow,
1357                                     const void * inInputData,
1358                                     const AudioTimeStamp * inInputTime,
1359                                     AudioBufferList * outOutputData,
1360                                     const AudioTimeStamp * inOutputTime,
1361                                     void * threadGlobals )
1362 {
1363     aout_buffer_t * p_buffer;
1364     mtime_t         current_date;
1365
1366     aout_instance_t * p_aout = (aout_instance_t *)threadGlobals;
1367     struct aout_sys_t * p_sys = p_aout->output.p_sys;
1368
1369     /* Check for the difference between the Device clock and mdate */
1370     p_sys->clock_diff = - (mtime_t)
1371         AudioConvertHostTimeToNanos( inNow->mHostTime ) / 1000;
1372     p_sys->clock_diff += mdate();
1373
1374     current_date = p_sys->clock_diff +
1375                    AudioConvertHostTimeToNanos( inOutputTime->mHostTime ) / 1000;
1376                    //- ((mtime_t) 1000000 / p_aout->output.output.i_rate * 31 ); // 31 = Latency in Frames. retrieve somewhere
1377
1378     p_buffer = aout_OutputNextBuffer( p_aout, current_date, true );
1379
1380 #define BUFFER outOutputData->mBuffers[p_sys->i_stream_index]
1381     if( p_buffer != NULL )
1382     {
1383         if( (int)BUFFER.mDataByteSize != (int)p_buffer->i_nb_bytes)
1384             msg_Warn( p_aout, "bytesize: %d nb_bytes: %d", (int)BUFFER.mDataByteSize, (int)p_buffer->i_nb_bytes );
1385  
1386         /* move data into output data buffer */
1387         vlc_memcpy( BUFFER.mData, p_buffer->p_buffer, p_buffer->i_nb_bytes );
1388         aout_BufferFree( p_buffer );
1389     }
1390     else
1391     {
1392         vlc_memset( BUFFER.mData, 0, BUFFER.mDataByteSize );
1393     }
1394 #undef BUFFER
1395
1396     return( noErr );
1397 }
1398
1399 /*****************************************************************************
1400  * HardwareListener: Warns us of changes in the list of registered devices
1401  *****************************************************************************/
1402 static OSStatus HardwareListener( AudioHardwarePropertyID inPropertyID,
1403                                   void * inClientData )
1404 {
1405     OSStatus err = noErr;
1406     aout_instance_t     *p_aout = (aout_instance_t *)inClientData;
1407
1408     switch( inPropertyID )
1409     {
1410         case kAudioHardwarePropertyDevices:
1411         {
1412             /* something changed in the list of devices */
1413             /* We trigger the audio-device's aout_ChannelsRestart callback */
1414             var_TriggerCallback( p_aout, "audio-device" );
1415             var_Destroy( p_aout, "audio-device" );
1416         }
1417         break;
1418     }
1419
1420     return( err );
1421 }
1422
1423 /*****************************************************************************
1424  * StreamListener
1425  *****************************************************************************/
1426 static OSStatus StreamListener( AudioStreamID inStream,
1427                                 UInt32 inChannel,
1428                                 AudioDevicePropertyID inPropertyID,
1429                                 void * inClientData )
1430 {
1431     OSStatus err = noErr;
1432     struct { vlc_mutex_t lock; vlc_cond_t cond; } * w = inClientData;
1433  
1434     switch( inPropertyID )
1435     {
1436         case kAudioStreamPropertyPhysicalFormat:
1437             vlc_mutex_lock( &w->lock );
1438             vlc_cond_signal( &w->cond );
1439             vlc_mutex_unlock( &w->lock );
1440             break;
1441
1442         default:
1443             break;
1444     }
1445     return( err );
1446 }
1447
1448 /*****************************************************************************
1449  * AudioDeviceCallback: Callback triggered when the audio-device variable is changed
1450  *****************************************************************************/
1451 static int AudioDeviceCallback( vlc_object_t *p_this, const char *psz_variable,
1452                      vlc_value_t old_val, vlc_value_t new_val, void *param )
1453 {
1454     aout_instance_t *p_aout = (aout_instance_t *)p_this;
1455     var_Set( p_aout->p_libvlc, "macosx-audio-device", new_val );
1456     msg_Dbg( p_aout, "Set Device: %#x", new_val.i_int );
1457     return aout_ChannelsRestart( p_this, psz_variable, old_val, new_val, param );
1458 }
1459