git.sesse.net Git - vlc/blob - 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 #include <string.h>
  28 #include <stdlib.h>
  29 #include <unistd.h>
  30
  31 #include <vlc/vlc.h>
  32 #include <vlc_interface.h>
  33 #include <vlc_aout.h>
  34
  35 #include <CoreAudio/CoreAudio.h>
  36 #include <AudioUnit/AudioUnitProperties.h>
  37 #include <AudioUnit/AudioUnitParameters.h>
  38 #include <AudioUnit/AudioOutputUnit.h>
  39 #include <AudioToolbox/AudioFormat.h>
  40
  41 #define STREAM_FORMAT_MSG( pre, sfm ) \
  42     pre "[%ld][%4.4s][%ld][%ld][%ld][%ld][%ld][%ld]", \
  43     (UInt32)sfm.mSampleRate, (char *)&sfm.mFormatID, \
  44     sfm.mFormatFlags, sfm.mBytesPerPacket, \
  45     sfm.mFramesPerPacket, sfm.mBytesPerFrame, \
  46     sfm.mChannelsPerFrame, sfm.mBitsPerChannel
  47
  48 #define STREAM_FORMAT_MSG_FULL( pre, sfm ) \
  49     pre ":\nsamplerate: [%ld]\nFormatID: [%4.4s]\nFormatFlags: [%ld]\nBypesPerPacket: [%ld]\nFramesPerPacket: [%ld]\nBytesPerFrame: [%ld]\nChannelsPerFrame: [%ld]\nBitsPerChannel[%ld]", \
  50     (UInt32)sfm.mSampleRate, (char *)&sfm.mFormatID, \
  51     sfm.mFormatFlags, sfm.mBytesPerPacket, \
  52     sfm.mFramesPerPacket, sfm.mBytesPerFrame, \
  53     sfm.mChannelsPerFrame, sfm.mBitsPerChannel
  54
  55 #define BUFSIZE 0xffffff
  56 #define AOUT_VAR_SPDIF_FLAG 0xf00000
  57
  58 /*
  59  * TODO:
  60  * - clean up the debug info
  61  * - clean up C99'isms
  62  * - be better at changing stream setup or devices setup changes while playing.
  63  * - fix 6.1 and 7.1
  64  */
  65
  66 /*****************************************************************************
  67  * aout_sys_t: private audio output method descriptor
  68  *****************************************************************************
  69  * This structure is part of the audio output thread descriptor.
  70  * It describes the CoreAudio specific properties of an output thread.
  71  *****************************************************************************/
  72 struct aout_sys_t
  73 {
  74     AudioDeviceID               i_default_dev;  /* Keeps DeviceID of defaultOutputDevice */
  75     AudioDeviceID               i_selected_dev; /* Keeps DeviceID of the selected device */
  76     UInt32                      i_devices;      /* Number of CoreAudio Devices */
  77     vlc_bool_t                  b_supports_digital;/* Does the currently selected device support digital mode? */
  78     vlc_bool_t                  b_digital;      /* Are we running in digital mode? */
  79     mtime_t                     clock_diff;     /* Difference between VLC clock and Device clock */
  80
  81     /* AUHAL specific */
  82     Component                   au_component;   /* The Audiocomponent we use */
  83     AudioUnit                   au_unit;        /* The AudioUnit we use */
  84     uint8_t                     p_remainder_buffer[BUFSIZE];
  85     uint32_t                    i_read_bytes;
  86     uint32_t                    i_total_bytes;
  87
  88     /* CoreAudio SPDIF mode specific */
  89     pid_t                       i_hog_pid;      /* The keep the pid of our hog status */
  90     AudioStreamID               i_stream_id;    /* The StreamID that has a cac3 streamformat */
  91     int                         i_stream_index; /* The index of i_stream_id in an AudioBufferList */
  92     AudioStreamBasicDescription stream_format;  /* The format we changed the stream to */
  93     AudioStreamBasicDescription sfmt_revert;    /* The original format of the stream */
  94     vlc_bool_t                  b_revert;       /* Wether we need to revert the stream format */
  95     vlc_bool_t                  b_changed_mixing;/* Wether we need to set the mixing mode back */
  96 };
  97
  98 /*****************************************************************************
  99  * Local prototypes.
 100  *****************************************************************************/
 101 static int      Open                    ( vlc_object_t * );
 102 static int      OpenAnalog              ( aout_instance_t * );
 103 static int      OpenSPDIF               ( aout_instance_t * );
 104 static void     Close                   ( vlc_object_t * );
 105
 106 static void     Play                    ( aout_instance_t * );
 107 static void     Probe                   ( aout_instance_t * );
 108
 109 static int      AudioDeviceHasOutput    ( AudioDeviceID );
 110 static int      AudioDeviceSupportsDigital( aout_instance_t *, AudioDeviceID );
 111 static int      AudioStreamSupportsDigital( aout_instance_t *, AudioStreamID );
 112 static int      AudioStreamChangeFormat ( aout_instance_t *, AudioStreamID, AudioStreamBasicDescription );
 113
 114 static OSStatus RenderCallbackAnalog    ( vlc_object_t *, AudioUnitRenderActionFlags *, const AudioTimeStamp *,
 115                                           unsigned int, unsigned int, AudioBufferList *);
 116 static OSStatus RenderCallbackSPDIF     ( AudioDeviceID, const AudioTimeStamp *, const void *, const AudioTimeStamp *,
 117                                           AudioBufferList *, const AudioTimeStamp *, void * );
 118 static OSStatus HardwareListener        ( AudioHardwarePropertyID, void *);
 119 static OSStatus StreamListener          ( AudioStreamID, UInt32,
 120                                           AudioDevicePropertyID, void * );
 121 static int      AudioDeviceCallback     ( vlc_object_t *, const char *,
 122                                           vlc_value_t, vlc_value_t, void * );
 123
 124
 125 /*****************************************************************************
 126  * Module descriptor
 127  *****************************************************************************/
 128 #define ADEV_TEXT N_("Audio Device")
 129 #define ADEV_LONGTEXT N_("Choose a number corresponding to the number of an " \
 130     "audio device, as listed in your 'Audio Device' menu. This device will " \
 131     "then be used by default for audio playback.")
 132
 133 vlc_module_begin();
 134     set_shortname( "auhal" );
 135     set_description( _("HAL AudioUnit output") );
 136     set_capability( "audio output", 101 );
 137     set_category( CAT_AUDIO );
 138     set_subcategory( SUBCAT_AUDIO_AOUT );
 139     set_callbacks( Open, Close );
 140     add_integer( "macosx-audio-device", 0, NULL, ADEV_TEXT, ADEV_LONGTEXT, VLC_FALSE );
 141 vlc_module_end();
 142
 143 /*****************************************************************************
 144  * Open: open macosx audio output
 145  *****************************************************************************/
 146 static int Open( vlc_object_t * p_this )
 147 {
 148     OSStatus                err = noErr;
 149     UInt32                  i_param_size = 0;
 150     struct aout_sys_t       *p_sys = NULL;
 151     vlc_bool_t              b_alive = VLC_FALSE;
 152     vlc_value_t             val;
 153     aout_instance_t         *p_aout = (aout_instance_t *)p_this;
 154
 155     /* Allocate structure */
 156     p_aout->output.p_sys = malloc( sizeof( aout_sys_t ) );
 157     if( p_aout->output.p_sys == NULL )
 158     {
 159         msg_Err( p_aout, "out of memory" );
 160         return( VLC_ENOMEM );
 161     }
 162
 163     p_sys = p_aout->output.p_sys;
 164     p_sys->i_default_dev = 0;
 165     p_sys->i_selected_dev = 0;
 166     p_sys->i_devices = 0;
 167     p_sys->b_supports_digital = VLC_FALSE;
 168     p_sys->b_digital = VLC_FALSE;
 169     p_sys->au_component = NULL;
 170     p_sys->au_unit = NULL;
 171     p_sys->clock_diff = (mtime_t) 0;
 172     p_sys->i_read_bytes = 0;
 173     p_sys->i_total_bytes = 0;
 174     p_sys->i_hog_pid = -1;
 175     p_sys->i_stream_id = 0;
 176     p_sys->i_stream_index = -1;
 177     p_sys->b_revert = VLC_FALSE;
 178     p_sys->b_changed_mixing = VLC_FALSE;
 179     memset( p_sys->p_remainder_buffer, 0, sizeof(uint8_t) * BUFSIZE );
 180
 181     p_aout->output.pf_play = Play;
 182
 183     aout_FormatPrint( p_aout, "VLC is looking for:", (audio_sample_format_t *)&p_aout->output.output );
 184
 185     /* Persistent device variable */
 186     if( var_Type( p_aout->p_libvlc, "macosx-audio-device" ) == 0 )
 187     {
 188         var_Create( p_aout->p_libvlc, "macosx-audio-device", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 189     }
 190
 191     /* Build a list of devices */
 192     if( var_Type( p_aout, "audio-device" ) == 0 )
 193     {
 194         Probe( p_aout );
 195     }
 196
 197     /* What device do we want? */
 198     if( var_Get( p_aout, "audio-device", &val ) < 0 )
 199     {
 200         msg_Err( p_aout, "audio-device var does not exist. device probe failed." );
 201         goto error;
 202     }
 203
 204     p_sys->i_selected_dev = val.i_int & ~AOUT_VAR_SPDIF_FLAG; /* remove SPDIF flag to get the true DeviceID */
 205     p_sys->b_supports_digital = ( val.i_int & AOUT_VAR_SPDIF_FLAG ) ? VLC_TRUE : VLC_FALSE;
 206
 207     /* Check if the desired device is alive and usable */
 208     /* TODO: add a callback to the device to alert us if the device dies */
 209     i_param_size = sizeof( b_alive );
 210     err = AudioDeviceGetProperty( p_sys->i_selected_dev, 0, FALSE,
 211                                   kAudioDevicePropertyDeviceIsAlive,
 212                                   &i_param_size, &b_alive );
 213
 214     if( err != noErr )
 215     {
 216         msg_Err( p_aout, "could not check whether device is alive: %4.4s", (char *)&err );
 217         goto error;
 218     }
 219
 220     if( b_alive == VLC_FALSE )
 221     {
 222         msg_Warn( p_aout, "selected audio device is not alive, switching to default device" );
 223         p_sys->i_selected_dev = p_sys->i_default_dev;
 224     }
 225
 226     i_param_size = sizeof( p_sys->i_hog_pid );
 227     err = AudioDeviceGetProperty( p_sys->i_selected_dev, 0, FALSE,
 228                                   kAudioDevicePropertyHogMode,
 229                                   &i_param_size, &p_sys->i_hog_pid );
 230
 231     if( err != noErr )
 232     {
 233         /* This is not a fatal error. Some drivers simply don't support this property */
 234         msg_Warn( p_aout, "could not check whether device is hogged: %4.4s",
 235                  (char *)&err );
 236         p_sys->i_hog_pid = -1;
 237     }
 238
 239     if( p_sys->i_hog_pid != -1 && p_sys->i_hog_pid != getpid() )
 240     {
 241         msg_Err( p_aout, "Selected audio device is exclusively in use by another program." );
 242         intf_UserFatal( p_aout, VLC_FALSE, _("Audio output failed"),
 243                         _("The selected audio output device is exclusively in "
 244                           "use by another program.") );
 245         goto error;
 246     }
 247
 248     /* Check for Digital mode or Analog output mode */
 249     if( AOUT_FMT_NON_LINEAR( &p_aout->output.output ) && p_sys->b_supports_digital )
 250     {
 251         if( OpenSPDIF( p_aout ) )
 252             return VLC_SUCCESS;
 253     }
 254     else
 255     {
 256         if( OpenAnalog( p_aout ) )
 257             return VLC_SUCCESS;
 258     }
 259
 260 error:
 261     /* If we reach this, this aout has failed */
 262     var_Destroy( p_aout, "audio-device" );
 263     if( p_sys ) free( p_sys );
 264     return VLC_EGENERIC;
 265 }
 266
 267 /*****************************************************************************
 268  * Open: open and setup a HAL AudioUnit to do analog (multichannel) audio output
 269  *****************************************************************************/
 270 static int OpenAnalog( aout_instance_t *p_aout )
 271 {
 272     struct aout_sys_t           *p_sys = p_aout->output.p_sys;
 273     OSStatus                    err = noErr;
 274     UInt32                      i_param_size = 0, i = 0;
 275     int                         i_original;
 276     ComponentDescription        desc;
 277     AudioStreamBasicDescription DeviceFormat;
 278     AudioChannelLayout          *layout;
 279     AudioChannelLayout          new_layout;
 280     AURenderCallbackStruct      input;
 281
 282     /* Lets go find our Component */
 283     desc.componentType = kAudioUnitType_Output;
 284     desc.componentSubType = kAudioUnitSubType_HALOutput;
 285     desc.componentManufacturer = kAudioUnitManufacturer_Apple;
 286     desc.componentFlags = 0;
 287     desc.componentFlagsMask = 0;
 288
 289     p_sys->au_component = FindNextComponent( NULL, &desc );
 290     if( p_sys->au_component == NULL )
 291     {
 292         msg_Warn( p_aout, "we cannot find our HAL component" );
 293         return VLC_FALSE;
 294     }
 295
 296     err = OpenAComponent( p_sys->au_component, &p_sys->au_unit );
 297     if( err != noErr )
 298     {
 299         msg_Warn( p_aout, "we cannot open our HAL component" );
 300         return VLC_FALSE;
 301     }
 302
 303     /* Set the device we will use for this output unit */
 304     err = AudioUnitSetProperty( p_sys->au_unit,
 305                          kAudioOutputUnitProperty_CurrentDevice,
 306                          kAudioUnitScope_Global,
 307                          0,
 308                          &p_sys->i_selected_dev,
 309                          sizeof( AudioDeviceID ));
 310
 311     if( err != noErr )
 312     {
 313         msg_Warn( p_aout, "we cannot select the audio device" );
 314         return VLC_FALSE;
 315     }
 316
 317     /* Get the current format */
 318     i_param_size = sizeof(AudioStreamBasicDescription);
 319
 320     err = AudioUnitGetProperty( p_sys->au_unit,
 321                                    kAudioUnitProperty_StreamFormat,
 322                                    kAudioUnitScope_Input,
 323                                    0,
 324                                    &DeviceFormat,
 325                                    &i_param_size );
 326
 327     if( err != noErr ) return VLC_FALSE;
 328     else msg_Dbg( p_aout, STREAM_FORMAT_MSG( "current format is: ", DeviceFormat ) );
 329
 330     /* Get the channel layout of the device side of the unit (vlc -> unit -> device) */
 331     err = AudioUnitGetPropertyInfo( p_sys->au_unit,
 332                                    kAudioDevicePropertyPreferredChannelLayout,
 333                                    kAudioUnitScope_Output,
 334                                    0,
 335                                    &i_param_size,
 336                                    NULL );
 337
 338     if( err == noErr )
 339     {
 340         layout = (AudioChannelLayout *)malloc( i_param_size);
 341
 342         verify_noerr( AudioUnitGetProperty( p_sys->au_unit,
 343                                        kAudioDevicePropertyPreferredChannelLayout,
 344                                        kAudioUnitScope_Output,
 345                                        0,
 346                                        layout,
 347                                        &i_param_size ));
 348
 349         /* We need to "fill out" the ChannelLayout, because there are multiple ways that it can be set */
 350         if( layout->mChannelLayoutTag == kAudioChannelLayoutTag_UseChannelBitmap)
 351         {
 352             /* bitmap defined channellayout */
 353             verify_noerr( AudioFormatGetProperty( kAudioFormatProperty_ChannelLayoutForBitmap,
 354                                     sizeof( UInt32), &layout->mChannelBitmap,
 355                                     &i_param_size,
 356                                     layout ));
 357         }
 358         else if( layout->mChannelLayoutTag != kAudioChannelLayoutTag_UseChannelDescriptions )
 359         {
 360             /* layouttags defined channellayout */
 361             verify_noerr( AudioFormatGetProperty( kAudioFormatProperty_ChannelLayoutForTag,
 362                                     sizeof( AudioChannelLayoutTag ), &layout->mChannelLayoutTag,
 363                                     &i_param_size,
 364                                     layout ));
 365         }
 366
 367         msg_Dbg( p_aout, "layout of AUHAL has %d channels" , (int)layout->mNumberChannelDescriptions );
 368
 369         /* Initialize the VLC core channel count */
 370         p_aout->output.output.i_physical_channels = 0;
 371         i_original = p_aout->output.output.i_original_channels & AOUT_CHAN_PHYSMASK;
 372
 373         if( i_original == AOUT_CHAN_CENTER || layout->mNumberChannelDescriptions < 2 )
 374         {
 375             /* We only need Mono or cannot output more than 1 channel */
 376             p_aout->output.output.i_physical_channels = AOUT_CHAN_CENTER;
 377         }
 378         else if( i_original == (AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT) || layout->mNumberChannelDescriptions < 3 )
 379         {
 380             /* We only need Stereo or cannot output more than 2 channels */
 381             p_aout->output.output.i_physical_channels = AOUT_CHAN_RIGHT | AOUT_CHAN_LEFT;
 382         }
 383         else
 384         {
 385             /* We want more than stereo and we can do that */
 386             for( i = 0; i < layout->mNumberChannelDescriptions; i++ )
 387             {
 388                 msg_Dbg( p_aout, "this is channel: %d", (int)layout->mChannelDescriptions[i].mChannelLabel );
 389
 390                 switch( layout->mChannelDescriptions[i].mChannelLabel )
 391                 {
 392                     case kAudioChannelLabel_Left:
 393                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_LEFT;
 394                         continue;
 395                     case kAudioChannelLabel_Right:
 396                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_RIGHT;
 397                         continue;
 398                     case kAudioChannelLabel_Center:
 399                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_CENTER;
 400                         continue;
 401                     case kAudioChannelLabel_LFEScreen:
 402                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_LFE;
 403                         continue;
 404                     case kAudioChannelLabel_LeftSurround:
 405                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_REARLEFT;
 406                         continue;
 407                     case kAudioChannelLabel_RightSurround:
 408                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_REARRIGHT;
 409                         continue;
 410                     case kAudioChannelLabel_RearSurroundLeft:
 411                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_MIDDLELEFT;
 412                         continue;
 413                     case kAudioChannelLabel_RearSurroundRight:
 414                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_MIDDLERIGHT;
 415                         continue;
 416                     case kAudioChannelLabel_CenterSurround:
 417                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_REARCENTER;
 418                         continue;
 419                     default:
 420                         msg_Warn( p_aout, "unrecognized channel form provided by driver: %d", (int)layout->mChannelDescriptions[i].mChannelLabel );
 421                 }
 422             }
 423             if( p_aout->output.output.i_physical_channels == 0 )
 424             {
 425                 p_aout->output.output.i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
 426                 msg_Err( p_aout, "You should configure your speaker layout with Audio Midi Setup Utility in /Applications/Utilities. Now using Stereo mode." );
 427                 intf_UserFatal( p_aout, VLC_FALSE, _("Audio device is not configured"),
 428                                 _("You should configure your speaker layout with "
 429                                   "the \"Audio Midi Setup Utility\" in /Applications/"
 430                                   "Utilities. Stereo mode is being used now.") );
 431             }
 432         }
 433         if( layout ) free( layout );
 434     }
 435     else
 436     {
 437         msg_Warn( p_aout, "this driver does not support kAudioDevicePropertyPreferredChannelLayout. BAD DRIVER AUTHOR !!!" );
 438         p_aout->output.output.i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
 439     }
 440
 441     msg_Dbg( p_aout, "selected %d physical channels for device output", aout_FormatNbChannels( &p_aout->output.output ) );
 442     msg_Dbg( p_aout, "VLC will output: %s", aout_FormatPrintChannels( &p_aout->output.output ));
 443
 444     memset (&new_layout, 0, sizeof(new_layout));
 445     switch( aout_FormatNbChannels( &p_aout->output.output ) )
 446     {
 447         case 1:
 448             new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_Mono;
 449             break;
 450         case 2:
 451             new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_Stereo;
 452             break;
 453         case 3:
 454             if( p_aout->output.output.i_physical_channels & AOUT_CHAN_CENTER )
 455             {
 456                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_7; // L R C
 457             }
 458             else if( p_aout->output.output.i_physical_channels & AOUT_CHAN_LFE )
 459             {
 460                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_4; // L R LFE
 461             }
 462             break;
 463         case 4:
 464             if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_CENTER | AOUT_CHAN_LFE ) )
 465             {
 466                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_10; // L R C LFE
 467             }
 468             else if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT ) )
 469             {
 470                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_3; // L R Ls Rs
 471             }
 472             else if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_CENTER | AOUT_CHAN_REARCENTER ) )
 473             {
 474                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_3; // L R C Cs
 475             }
 476             break;
 477         case 5:
 478             if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_CENTER ) )
 479             {
 480                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_19; // L R Ls Rs C
 481             }
 482             else if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_LFE ) )
 483             {
 484                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_18; // L R Ls Rs LFE
 485             }
 486             break;
 487         case 6:
 488             if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_LFE ) )
 489             {
 490                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_20; // L R Ls Rs C LFE
 491             }
 492             else
 493             {
 494                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_AudioUnit_6_0; // L R Ls Rs C Cs
 495             }
 496             break;
 497         case 7:
 498             /* FIXME: This is incorrect. VLC uses the internal ordering: L R Lm Rm Lr Rr C LFE but this is wrong */
 499             new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_MPEG_6_1_A; // L R C LFE Ls Rs Cs
 500             break;
 501         case 8:
 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_7_1_A; // L R C LFE Ls Rs Lc Rc
 504             break;
 505     }
 506
 507     /* Set up the format to be used */
 508     DeviceFormat.mSampleRate = p_aout->output.output.i_rate;
 509     DeviceFormat.mFormatID = kAudioFormatLinearPCM;
 510
 511     /* We use float 32. It's the best supported format by both VLC and Coreaudio */
 512     p_aout->output.output.i_format = VLC_FOURCC( 'f','l','3','2');
 513     DeviceFormat.mFormatFlags = kAudioFormatFlagsNativeFloatPacked;
 514     DeviceFormat.mBitsPerChannel = 32;
 515     DeviceFormat.mChannelsPerFrame = aout_FormatNbChannels( &p_aout->output.output );
 516
 517     /* Calculate framesizes and stuff */
 518     DeviceFormat.mFramesPerPacket = 1;
 519     DeviceFormat.mBytesPerFrame = DeviceFormat.mBitsPerChannel * DeviceFormat.mChannelsPerFrame / 8;
 520     DeviceFormat.mBytesPerPacket = DeviceFormat.mBytesPerFrame * DeviceFormat.mFramesPerPacket;
 521
 522     /* Set the desired format */
 523     i_param_size = sizeof(AudioStreamBasicDescription);
 524     verify_noerr( AudioUnitSetProperty( p_sys->au_unit,
 525                                    kAudioUnitProperty_StreamFormat,
 526                                    kAudioUnitScope_Input,
 527                                    0,
 528                                    &DeviceFormat,
 529                                    i_param_size ));
 530
 531     msg_Dbg( p_aout, STREAM_FORMAT_MSG( "we set the AU format: " , DeviceFormat ) );
 532
 533     /* Retrieve actual format */
 534     verify_noerr( AudioUnitGetProperty( p_sys->au_unit,
 535                                    kAudioUnitProperty_StreamFormat,
 536                                    kAudioUnitScope_Input,
 537                                    0,
 538                                    &DeviceFormat,
 539                                    &i_param_size ));
 540
 541     msg_Dbg( p_aout, STREAM_FORMAT_MSG( "the actual set AU format is " , DeviceFormat ) );
 542
 543     /* Do the last VLC aout setups */
 544     aout_FormatPrepare( &p_aout->output.output );
 545     p_aout->output.i_nb_samples = 2048;
 546     aout_VolumeSoftInit( p_aout );
 547
 548     /* set the IOproc callback */
 549     input.inputProc = (AURenderCallback) RenderCallbackAnalog;
 550     input.inputProcRefCon = p_aout;
 551
 552     verify_noerr( AudioUnitSetProperty( p_sys->au_unit,
 553                             kAudioUnitProperty_SetRenderCallback,
 554                             kAudioUnitScope_Input,
 555                             0, &input, sizeof( input ) ) );
 556
 557     input.inputProc = (AURenderCallback) RenderCallbackAnalog;
 558     input.inputProcRefCon = p_aout;
 559
 560     /* Set the new_layout as the layout VLC will use to feed the AU unit */
 561     verify_noerr( AudioUnitSetProperty( p_sys->au_unit,
 562                             kAudioUnitProperty_AudioChannelLayout,
 563                             kAudioUnitScope_Input,
 564                             0, &new_layout, sizeof(new_layout) ) );
 565
 566     if( new_layout.mNumberChannelDescriptions > 0 )
 567         free( new_layout.mChannelDescriptions );
 568
 569     /* AU initiliaze */
 570     verify_noerr( AudioUnitInitialize(p_sys->au_unit) );
 571
 572     /* Find the difference between device clock and mdate clock */
 573     p_sys->clock_diff = - (mtime_t)
 574         AudioConvertHostTimeToNanos( AudioGetCurrentHostTime() ) / 1000;
 575     p_sys->clock_diff += mdate();
 576
 577     /* Start the AU */
 578     verify_noerr( AudioOutputUnitStart(p_sys->au_unit) );
 579
 580     return VLC_TRUE;
 581 }
 582
 583 /*****************************************************************************
 584  * Setup a encoded digital stream (SPDIF)
 585  *****************************************************************************/
 586 static int OpenSPDIF( aout_instance_t * p_aout )
 587 {
 588     struct aout_sys_t       *p_sys = p_aout->output.p_sys;
 589     OSStatus                err = noErr;
 590     UInt32                  i_param_size = 0, b_mix = 0;
 591     Boolean                 b_writeable = VLC_FALSE;
 592     AudioStreamID           *p_streams = NULL;
 593     int                     i = 0, i_streams = 0;
 594
 595     /* Start doing the SPDIF setup proces */
 596     p_sys->b_digital = VLC_TRUE;
 597
 598     /* Hog the device */
 599     i_param_size = sizeof( p_sys->i_hog_pid );
 600     p_sys->i_hog_pid = getpid() ;
 601
 602     err = AudioDeviceSetProperty( p_sys->i_selected_dev, 0, 0, FALSE,
 603                                   kAudioDevicePropertyHogMode, i_param_size, &p_sys->i_hog_pid );
 604
 605     if( err != noErr )
 606     {
 607         msg_Err( p_aout, "failed to set hogmode: [%4.4s]", (char *)&err );
 608         return VLC_FALSE;
 609     }
 610
 611     /* Set mixable to false if we are allowed to */
 612     err = AudioDeviceGetPropertyInfo( p_sys->i_selected_dev, 0, FALSE, kAudioDevicePropertySupportsMixing,
 613                                     &i_param_size, &b_writeable );
 614
 615     err = AudioDeviceGetProperty( p_sys->i_selected_dev, 0, FALSE, kAudioDevicePropertySupportsMixing,
 616                                     &i_param_size, &b_mix );
 617
 618     if( !err && b_writeable )
 619     {
 620         b_mix = 0;
 621         err = AudioDeviceSetProperty( p_sys->i_selected_dev, 0, 0, FALSE,
 622                             kAudioDevicePropertySupportsMixing, i_param_size, &b_mix );
 623         p_sys->b_changed_mixing = VLC_TRUE;
 624     }
 625
 626     if( err != noErr )
 627     {
 628         msg_Err( p_aout, "failed to set mixmode: [%4.4s]", (char *)&err );
 629         return VLC_FALSE;
 630     }
 631
 632     /* Get a list of all the streams on this device */
 633     err = AudioDeviceGetPropertyInfo( p_sys->i_selected_dev, 0, FALSE,
 634                                       kAudioDevicePropertyStreams,
 635                                       &i_param_size, NULL );
 636     if( err != noErr )
 637     {
 638         msg_Err( p_aout, "could not get number of streams: [%4.4s]", (char *)&err );
 639         return VLC_FALSE;
 640     }
 641
 642     i_streams = i_param_size / sizeof( AudioStreamID );
 643     p_streams = (AudioStreamID *)malloc( i_param_size );
 644     if( p_streams == NULL )
 645     {
 646         msg_Err( p_aout, "out of memory" );
 647         return VLC_FALSE;
 648     }
 649
 650     err = AudioDeviceGetProperty( p_sys->i_selected_dev, 0, FALSE,
 651                                     kAudioDevicePropertyStreams,
 652                                     &i_param_size, p_streams );
 653
 654     if( err != noErr )
 655     {
 656         msg_Err( p_aout, "could not get number of streams: [%4.4s]", (char *)&err );
 657         if( p_streams ) free( p_streams );
 658         return VLC_FALSE;
 659     }
 660
 661     for( i = 0; i < i_streams && p_sys->i_stream_index < 0 ; i++ )
 662     {
 663         /* Find a stream with a cac3 stream */
 664         AudioStreamBasicDescription *p_format_list = NULL;
 665         int                         i_formats = 0, j = 0;
 666         vlc_bool_t                  b_digital = VLC_FALSE;
 667
 668         /* Retrieve all the stream formats supported by each output stream */
 669         err = AudioStreamGetPropertyInfo( p_streams[i], 0,
 670                                           kAudioStreamPropertyPhysicalFormats,
 671                                           &i_param_size, NULL );
 672         if( err != noErr )
 673         {
 674             msg_Err( p_aout, "could not get number of streamformats: [%4.4s]", (char *)&err );
 675             continue;
 676         }
 677
 678         i_formats = i_param_size / sizeof( AudioStreamBasicDescription );
 679         p_format_list = (AudioStreamBasicDescription *)malloc( i_param_size );
 680         if( p_format_list == NULL )
 681         {
 682             msg_Err( p_aout, "could not malloc the memory" );
 683             continue;
 684         }
 685
 686         err = AudioStreamGetProperty( p_streams[i], 0,
 687                                           kAudioStreamPropertyPhysicalFormats,
 688                                           &i_param_size, p_format_list );
 689         if( err != noErr )
 690         {
 691             msg_Err( p_aout, "could not get the list of streamformats: [%4.4s]", (char *)&err );
 692             if( p_format_list) free( p_format_list);
 693             continue;
 694         }
 695
 696         /* Check if one of the supported formats is a digital format */
 697         for( j = 0; j < i_formats; j++ )
 698         {
 699             if( p_format_list[j].mFormatID == 'IAC3' ||
 700                   p_format_list[j].mFormatID == kAudioFormat60958AC3 )
 701             {
 702                 b_digital = VLC_TRUE;
 703                 break;
 704             }
 705         }
 706
 707         if( b_digital )
 708         {
 709             /* if this stream supports a digital (cac3) format, then go set it. */
 710             int i_requested_rate_format = -1;
 711             int i_current_rate_format = -1;
 712             int i_backup_rate_format = -1;
 713
 714             p_sys->i_stream_id = p_streams[i];
 715             p_sys->i_stream_index = i;
 716
 717             if( p_sys->b_revert == VLC_FALSE )
 718             {
 719                 /* Retrieve the original format of this stream first if not done so already */
 720                 i_param_size = sizeof( p_sys->sfmt_revert );
 721                 err = AudioStreamGetProperty( p_sys->i_stream_id, 0,
 722                                               kAudioStreamPropertyPhysicalFormat,
 723                                               &i_param_size,
 724                                               &p_sys->sfmt_revert );
 725                 if( err != noErr )
 726                 {
 727                     msg_Err( p_aout, "could not retrieve the original streamformat: [%4.4s]", (char *)&err );
 728                     continue;
 729                 }
 730                 p_sys->b_revert = VLC_TRUE;
 731             }
 732
 733             for( j = 0; j < i_formats; j++ )
 734             {
 735                 if( p_format_list[j].mFormatID == 'IAC3' ||
 736                       p_format_list[j].mFormatID == kAudioFormat60958AC3 )
 737                 {
 738                     if( p_format_list[j].mSampleRate == p_aout->output.output.i_rate )
 739                     {
 740                         i_requested_rate_format = j;
 741                         break;
 742                     }
 743                     else if( p_format_list[j].mSampleRate == p_sys->sfmt_revert.mSampleRate )
 744                     {
 745                         i_current_rate_format = j;
 746                     }
 747                     else
 748                     {
 749                         if( i_backup_rate_format < 0 || p_format_list[j].mSampleRate > p_format_list[i_backup_rate_format].mSampleRate )
 750                             i_backup_rate_format = j;
 751                     }
 752                 }
 753
 754             }
 755
 756             if( i_requested_rate_format >= 0 ) /* We prefer to output at the samplerate of the original audio */
 757                 p_sys->stream_format = p_format_list[i_requested_rate_format];
 758             else if( i_current_rate_format >= 0 ) /* If not possible, we will try to use the current samplerate of the device */
 759                 p_sys->stream_format = p_format_list[i_current_rate_format];
 760             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) */
 761         }
 762         if( p_format_list ) free( p_format_list );
 763     }
 764     if( p_streams ) free( p_streams );
 765
 766     msg_Dbg( p_aout, STREAM_FORMAT_MSG( "original stream format: ", p_sys->sfmt_revert ) );
 767
 768     if( !AudioStreamChangeFormat( p_aout, p_sys->i_stream_id, p_sys->stream_format ) )
 769         return VLC_FALSE;
 770
 771     /* Set the format flags */
 772     if( p_sys->stream_format.mFormatFlags & kAudioFormatFlagIsBigEndian )
 773         p_aout->output.output.i_format = VLC_FOURCC('s','p','d','b');
 774     else
 775         p_aout->output.output.i_format = VLC_FOURCC('s','p','d','i');
 776     p_aout->output.output.i_bytes_per_frame = AOUT_SPDIF_SIZE;
 777     p_aout->output.output.i_frame_length = A52_FRAME_NB;
 778     p_aout->output.i_nb_samples = p_aout->output.output.i_frame_length;
 779     p_aout->output.output.i_rate = (unsigned int)p_sys->stream_format.mSampleRate;
 780     aout_FormatPrepare( &p_aout->output.output );
 781     aout_VolumeNoneInit( p_aout );
 782
 783     /* Add IOProc callback */
 784     err = AudioDeviceAddIOProc( p_sys->i_selected_dev,
 785                                 (AudioDeviceIOProc)RenderCallbackSPDIF,
 786                                 (void *)p_aout );
 787     if( err != noErr )
 788     {
 789         msg_Err( p_aout, "AudioDeviceAddIOProc failed: [%4.4s]", (char *)&err );
 790         return VLC_FALSE;
 791     }
 792
 793     /* Check for the difference between the Device clock and mdate */
 794     p_sys->clock_diff = - (mtime_t)
 795         AudioConvertHostTimeToNanos( AudioGetCurrentHostTime() ) / 1000;
 796     p_sys->clock_diff += mdate();
 797
 798     /* Start device */
 799     err = AudioDeviceStart( p_sys->i_selected_dev, (AudioDeviceIOProc)RenderCallbackSPDIF );
 800     if( err != noErr )
 801     {
 802         msg_Err( p_aout, "AudioDeviceStart failed: [%4.4s]", (char *)&err );
 803
 804         err = AudioDeviceRemoveIOProc( p_sys->i_selected_dev,
 805                                        (AudioDeviceIOProc)RenderCallbackSPDIF );
 806         if( err != noErr )
 807         {
 808             msg_Err( p_aout, "AudioDeviceRemoveIOProc failed: [%4.4s]", (char *)&err );
 809         }
 810         return VLC_FALSE;
 811     }
 812
 813     return VLC_TRUE;
 814 }
 815
 816
 817 /*****************************************************************************
 818  * Close: Close HAL AudioUnit
 819  *****************************************************************************/
 820 static void Close( vlc_object_t * p_this )
 821 {
 822     aout_instance_t     *p_aout = (aout_instance_t *)p_this;
 823     struct aout_sys_t   *p_sys = p_aout->output.p_sys;
 824     OSStatus            err = noErr;
 825     UInt32              i_param_size = 0;
 826
 827     if( p_sys->au_unit )
 828     {
 829         verify_noerr( AudioOutputUnitStop( p_sys->au_unit ) );
 830         verify_noerr( AudioUnitUninitialize( p_sys->au_unit ) );
 831         verify_noerr( CloseComponent( p_sys->au_unit ) );
 832     }
 833
 834     if( p_sys->b_digital )
 835     {
 836         /* Stop device */
 837         err = AudioDeviceStop( p_sys->i_selected_dev,
 838                                (AudioDeviceIOProc)RenderCallbackSPDIF );
 839         if( err != noErr )
 840         {
 841             msg_Err( p_aout, "AudioDeviceStop failed: [%4.4s]", (char *)&err );
 842         }
 843
 844         /* Remove IOProc callback */
 845         err = AudioDeviceRemoveIOProc( p_sys->i_selected_dev,
 846                                        (AudioDeviceIOProc)RenderCallbackSPDIF );
 847         if( err != noErr )
 848         {
 849             msg_Err( p_aout, "AudioDeviceRemoveIOProc failed: [%4.4s]", (char *)&err );
 850         }
 851
 852         if( p_sys->b_revert )
 853         {
 854             AudioStreamChangeFormat( p_aout, p_sys->i_stream_id, p_sys->sfmt_revert );
 855         }
 856
 857         if( p_sys->b_changed_mixing && p_sys->sfmt_revert.mFormatID != kAudioFormat60958AC3 )
 858         {
 859             int b_mix;
 860             Boolean b_writeable;
 861             /* Revert mixable to true if we are allowed to */
 862             err = AudioDeviceGetPropertyInfo( p_sys->i_selected_dev, 0, FALSE, kAudioDevicePropertySupportsMixing,
 863                                         &i_param_size, &b_writeable );
 864
 865             err = AudioDeviceGetProperty( p_sys->i_selected_dev, 0, FALSE, kAudioDevicePropertySupportsMixing,
 866                                         &i_param_size, &b_mix );
 867
 868             if( !err && b_writeable )
 869             {
 870                 msg_Dbg( p_aout, "mixable is: %d", b_mix );
 871                 b_mix = 1;
 872                 err = AudioDeviceSetProperty( p_sys->i_selected_dev, 0, 0, FALSE,
 873                                     kAudioDevicePropertySupportsMixing, i_param_size, &b_mix );
 874             }
 875
 876             if( err != noErr )
 877             {
 878                 msg_Err( p_aout, "failed to set mixmode: [%4.4s]", (char *)&err );
 879             }
 880         }
 881     }
 882
 883     err = AudioHardwareRemovePropertyListener( kAudioHardwarePropertyDevices,
 884                                                HardwareListener );
 885
 886     if( err != noErr )
 887     {
 888         msg_Err( p_aout, "AudioHardwareRemovePropertyListener failed: [%4.4s]", (char *)&err );
 889     }
 890
 891     if( p_sys->i_hog_pid == getpid() )
 892     {
 893         p_sys->i_hog_pid = -1;
 894         i_param_size = sizeof( p_sys->i_hog_pid );
 895         err = AudioDeviceSetProperty( p_sys->i_selected_dev, 0, 0, FALSE,
 896                                          kAudioDevicePropertyHogMode, i_param_size, &p_sys->i_hog_pid );
 897         if( err != noErr ) msg_Err( p_aout, "Could not release hogmode: [%4.4s]", (char *)&err );
 898     }
 899
 900     if( p_sys ) free( p_sys );
 901 }
 902
 903 /*****************************************************************************
 904  * Play: nothing to do
 905  *****************************************************************************/
 906 static void Play( aout_instance_t * p_aout )
 907 {
 908 }
 909
 910
 911 /*****************************************************************************
 912  * Probe: Check which devices the OS has, and add them to our audio-device menu
 913  *****************************************************************************/
 914 static void Probe( aout_instance_t * p_aout )
 915 {
 916     OSStatus            err = noErr;
 917     UInt32              i = 0, i_param_size = 0;
 918     AudioDeviceID       devid_def = 0;
 919     AudioDeviceID       *p_devices = NULL;
 920     vlc_value_t         val, text;
 921
 922     struct aout_sys_t   *p_sys = p_aout->output.p_sys;
 923
 924     /* Get number of devices */
 925     err = AudioHardwareGetPropertyInfo( kAudioHardwarePropertyDevices,
 926                                         &i_param_size, NULL );
 927     if( err != noErr )
 928     {
 929         msg_Err( p_aout, "Could not get number of devices: [%4.4s]", (char *)&err );
 930         goto error;
 931     }
 932
 933     p_sys->i_devices = i_param_size / sizeof( AudioDeviceID );
 934
 935     if( p_sys->i_devices < 1 )
 936     {
 937         msg_Err( p_aout, "No audio output devices were found." );
 938         goto error;
 939     }
 940
 941     msg_Dbg( p_aout, "system has [%ld] device(s)", p_sys->i_devices );
 942
 943     /* Allocate DeviceID array */
 944     p_devices = (AudioDeviceID*)malloc( sizeof(AudioDeviceID) * p_sys->i_devices );
 945     if( p_devices == NULL )
 946     {
 947         msg_Err( p_aout, "out of memory" );
 948         goto error;
 949     }
 950
 951     /* Populate DeviceID array */
 952     err = AudioHardwareGetProperty( kAudioHardwarePropertyDevices,
 953                                     &i_param_size, p_devices );
 954     if( err != noErr )
 955     {
 956         msg_Err( p_aout, "could not get the device IDs: [%4.4s]", (char *)&err );
 957         goto error;
 958     }
 959
 960     /* Find the ID of the default Device */
 961     i_param_size = sizeof( AudioDeviceID );
 962     err = AudioHardwareGetProperty( kAudioHardwarePropertyDefaultOutputDevice,
 963                                     &i_param_size, &devid_def );
 964     if( err != noErr )
 965     {
 966         msg_Err( p_aout, "could not get default audio device: [%4.4s]", (char *)&err );
 967         goto error;
 968     }
 969     p_sys->i_default_dev = devid_def;
 970
 971     var_Create( p_aout, "audio-device", VLC_VAR_INTEGER|VLC_VAR_HASCHOICE );
 972     text.psz_string = _("Audio Device");
 973     var_Change( p_aout, "audio-device", VLC_VAR_SETTEXT, &text, NULL );
 974
 975     for( i = 0; i < p_sys->i_devices; i++ )
 976     {
 977         char *psz_name;
 978         i_param_size = 0;
 979
 980         /* Retrieve the length of the device name */
 981         err = AudioDeviceGetPropertyInfo(
 982                     p_devices[i], 0, VLC_FALSE,
 983                     kAudioDevicePropertyDeviceName,
 984                     &i_param_size, NULL);
 985         if( err ) goto error;
 986
 987         /* Retrieve the name of the device */
 988         psz_name = (char *)malloc( i_param_size );
 989         err = AudioDeviceGetProperty(
 990                     p_devices[i], 0, VLC_FALSE,
 991                     kAudioDevicePropertyDeviceName,
 992                     &i_param_size, psz_name);
 993         if( err ) goto error;
 994
 995         msg_Dbg( p_aout, "DevID: %#lx DevName: %s", p_devices[i], psz_name );
 996
 997         if( !AudioDeviceHasOutput( p_devices[i]) )
 998         {
 999             msg_Dbg( p_aout, "this device is INPUT only. skipping..." );
1000             continue;
1001         }
1002
1003         /* Add the menu entries */
1004         val.i_int = (int)p_devices[i];
1005         text.psz_string = strdup( psz_name );
1006         var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
1007         if( p_sys->i_default_dev == p_devices[i] )
1008         {
1009             /* The default device is the selected device normally */
1010             var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
1011             var_Set( p_aout, "audio-device", val );
1012         }
1013
1014         if( AudioDeviceSupportsDigital( p_aout, p_devices[i] ) )
1015         {
1016             val.i_int = (int)p_devices[i] | AOUT_VAR_SPDIF_FLAG;
1017             asprintf( &text.psz_string, _("%s (Encoded Output)"), psz_name );
1018             var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
1019             if( p_sys->i_default_dev == p_devices[i] && config_GetInt( p_aout, "spdif" ) )
1020             {
1021                 /* We selected to prefer SPDIF output if available
1022                  * then this "dummy" entry should be selected */
1023                 var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
1024                 var_Set( p_aout, "audio-device", val );
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     if( p_devices ) free( p_devices );
1050     return;
1051
1052 error:
1053     var_Destroy( p_aout, "audio-device" );
1054     if( p_devices ) 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     vlc_bool_t                  b_return = VLC_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 VLC_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     {
1097         msg_Err( p_aout, "out of memory" );
1098         return VLC_ENOMEM;
1099     }
1100
1101     err = AudioDeviceGetProperty( i_dev_id, 0, FALSE,
1102                                     kAudioDevicePropertyStreams,
1103                                     &i_param_size, p_streams );
1104
1105     if( err != noErr )
1106     {
1107         msg_Err( p_aout, "could not get number of streams: [%4.4s]", (char *)&err );
1108         return VLC_FALSE;
1109     }
1110
1111     for( i = 0; i < i_streams; i++ )
1112     {
1113         if( AudioStreamSupportsDigital( p_aout, p_streams[i] ) )
1114             b_return = VLC_TRUE;
1115     }
1116
1117     if( p_streams ) free( p_streams );
1118     return b_return;
1119 }
1120
1121 /*****************************************************************************
1122  * AudioStreamSupportsDigital: Check i_stream_id for digital stream support.
1123  *****************************************************************************/
1124 static int AudioStreamSupportsDigital( aout_instance_t *p_aout, AudioStreamID i_stream_id )
1125 {
1126     OSStatus                    err = noErr;
1127     UInt32                      i_param_size = 0;
1128     AudioStreamBasicDescription *p_format_list = NULL;
1129     int                         i = 0, i_formats = 0;
1130     vlc_bool_t                  b_return = VLC_FALSE;
1131
1132     /* Retrieve all the stream formats supported by each output stream */
1133     err = AudioStreamGetPropertyInfo( i_stream_id, 0,
1134                                       kAudioStreamPropertyPhysicalFormats,
1135                                       &i_param_size, NULL );
1136     if( err != noErr )
1137     {
1138         msg_Err( p_aout, "could not get number of streamformats: [%4.4s]", (char *)&err );
1139         return VLC_FALSE;
1140     }
1141
1142     i_formats = i_param_size / sizeof( AudioStreamBasicDescription );
1143     p_format_list = (AudioStreamBasicDescription *)malloc( i_param_size );
1144     if( p_format_list == NULL )
1145     {
1146         msg_Err( p_aout, "could not malloc the memory" );
1147         return VLC_FALSE;
1148     }
1149
1150     err = AudioStreamGetProperty( i_stream_id, 0,
1151                                       kAudioStreamPropertyPhysicalFormats,
1152                                       &i_param_size, p_format_list );
1153     if( err != noErr )
1154     {
1155         msg_Err( p_aout, "could not get the list of streamformats: [%4.4s]", (char *)&err );
1156         free( p_format_list);
1157         p_format_list = NULL;
1158         return VLC_FALSE;
1159     }
1160
1161     for( i = 0; i < i_formats; i++ )
1162     {
1163         msg_Dbg( p_aout, STREAM_FORMAT_MSG( "supported format: ", p_format_list[i] ) );
1164
1165         if( p_format_list[i].mFormatID == 'IAC3' ||
1166                   p_format_list[i].mFormatID == kAudioFormat60958AC3 )
1167         {
1168             b_return = VLC_TRUE;
1169         }
1170     }
1171
1172     if( p_format_list ) free( p_format_list );
1173     return b_return;
1174 }
1175
1176 /*****************************************************************************
1177  * AudioStreamChangeFormat: Change i_stream_id to change_format
1178  *****************************************************************************/
1179 static int AudioStreamChangeFormat( aout_instance_t *p_aout, AudioStreamID i_stream_id, AudioStreamBasicDescription change_format )
1180 {
1181     OSStatus            err = noErr;
1182     UInt32              i_param_size = 0;
1183     int i;
1184
1185     struct timeval now;
1186     struct timespec timeout;
1187     struct { vlc_mutex_t lock; vlc_cond_t cond; } w;
1188
1189     msg_Dbg( p_aout, STREAM_FORMAT_MSG( "setting stream format: ", change_format ) );
1190
1191     /* Condition because SetProperty is asynchronious */
1192     vlc_cond_init( p_aout, &w.cond );
1193     vlc_mutex_init( p_aout, &w.lock );
1194     vlc_mutex_lock( &w.lock );
1195
1196     /* Install the callback */
1197     err = AudioStreamAddPropertyListener( i_stream_id, 0,
1198                                       kAudioStreamPropertyPhysicalFormat,
1199                                       StreamListener, (void *)&w );
1200     if( err != noErr )
1201     {
1202         msg_Err( p_aout, "AudioStreamAddPropertyListener failed: [%4.4s]", (char *)&err );
1203         return VLC_FALSE;
1204     }
1205
1206     /* change the format */
1207     err = AudioStreamSetProperty( i_stream_id, 0, 0,
1208                                   kAudioStreamPropertyPhysicalFormat,
1209                                   sizeof( AudioStreamBasicDescription ),
1210                                   &change_format );
1211     if( err != noErr )
1212     {
1213         msg_Err( p_aout, "could not set the stream format: [%4.4s]", (char *)&err );
1214         return VLC_FALSE;
1215     }
1216
1217     /* The AudioStreamSetProperty is not only asynchronious (requiring the locks)
1218      * it is also not atomic in its behaviour.
1219      * Therefore we check 5 times before we really give up.
1220      * FIXME: failing isn't actually implemented yet. */
1221     for( i = 0; i < 5; i++ )
1222     {
1223         AudioStreamBasicDescription actual_format;
1224
1225         gettimeofday( &now, NULL );
1226         timeout.tv_sec = now.tv_sec;
1227         timeout.tv_nsec = (now.tv_usec + 500000) * 1000;
1228
1229         if( pthread_cond_timedwait( &w.cond.cond, &w.lock.mutex, &timeout ) )
1230         {
1231             msg_Dbg( p_aout, "reached timeout" );
1232         }
1233
1234         i_param_size = sizeof( AudioStreamBasicDescription );
1235         err = AudioStreamGetProperty( i_stream_id, 0,
1236                                       kAudioStreamPropertyPhysicalFormat,
1237                                       &i_param_size,
1238                                       &actual_format );
1239
1240         msg_Dbg( p_aout, STREAM_FORMAT_MSG( "actual format in use: ", actual_format ) );
1241         if( actual_format.mSampleRate == change_format.mSampleRate &&
1242             actual_format.mFormatID == change_format.mFormatID &&
1243             actual_format.mFramesPerPacket == change_format.mFramesPerPacket )
1244         {
1245             /* The right format is now active */
1246             break;
1247         }
1248         /* We need to check again */
1249     }
1250
1251     /* Removing the property listener */
1252     err = AudioStreamRemovePropertyListener( i_stream_id, 0,
1253                                             kAudioStreamPropertyPhysicalFormat,
1254                                             StreamListener );
1255     if( err != noErr )
1256     {
1257         msg_Err( p_aout, "AudioStreamRemovePropertyListener failed: [%4.4s]", (char *)&err );
1258         return VLC_FALSE;
1259     }
1260
1261     /* Destroy the lock and condition */
1262     vlc_mutex_unlock( &w.lock );
1263     vlc_mutex_destroy( &w.lock );
1264     vlc_cond_destroy( &w.cond );
1265
1266     return VLC_TRUE;
1267 }
1268
1269 /*****************************************************************************
1270  * RenderCallbackAnalog: This function is called everytime the AudioUnit wants
1271  * us to provide some more audio data.
1272  * Don't print anything during normal playback, calling blocking function from
1273  * this callback is not allowed.
1274  *****************************************************************************/
1275 static OSStatus RenderCallbackAnalog( vlc_object_t *_p_aout,
1276                                       AudioUnitRenderActionFlags *ioActionFlags,
1277                                       const AudioTimeStamp *inTimeStamp,
1278                                       unsigned int inBusNummer,
1279                                       unsigned int inNumberFrames,
1280                                       AudioBufferList *ioData )
1281 {
1282     AudioTimeStamp  host_time;
1283     mtime_t         current_date = 0;
1284     uint32_t        i_mData_bytes = 0;
1285
1286     aout_instance_t * p_aout = (aout_instance_t *)_p_aout;
1287     struct aout_sys_t * p_sys = p_aout->output.p_sys;
1288
1289     host_time.mFlags = kAudioTimeStampHostTimeValid;
1290     AudioDeviceTranslateTime( p_sys->i_selected_dev, inTimeStamp, &host_time );
1291
1292     /* Check for the difference between the Device clock and mdate */
1293     p_sys->clock_diff = - (mtime_t)
1294         AudioConvertHostTimeToNanos( AudioGetCurrentHostTime() ) / 1000;
1295     p_sys->clock_diff += mdate();
1296
1297     current_date = p_sys->clock_diff +
1298                    AudioConvertHostTimeToNanos( host_time.mHostTime ) / 1000;
1299                    //- ((mtime_t) 1000000 / p_aout->output.output.i_rate * 31 ); // 31 = Latency in Frames. retrieve somewhere
1300
1301     if( ioData == NULL && ioData->mNumberBuffers < 1 )
1302     {
1303         msg_Err( p_aout, "no iodata or buffers");
1304         return 0;
1305     }
1306     if( ioData->mNumberBuffers > 1 )
1307         msg_Err( p_aout, "well this is weird. seems like there is more than one buffer..." );
1308
1309
1310     if( p_sys->i_total_bytes > 0 )
1311     {
1312         i_mData_bytes = __MIN( p_sys->i_total_bytes - p_sys->i_read_bytes, ioData->mBuffers[0].mDataByteSize );
1313         p_aout->p_libvlc->pf_memcpy( ioData->mBuffers[0].mData, &p_sys->p_remainder_buffer[p_sys->i_read_bytes], i_mData_bytes );
1314         p_sys->i_read_bytes += i_mData_bytes;
1315         current_date += (mtime_t) ( (mtime_t) 1000000 / p_aout->output.output.i_rate ) *
1316                         ( i_mData_bytes / 4 / aout_FormatNbChannels( &p_aout->output.output )  ); // 4 is fl32 specific
1317
1318         if( p_sys->i_read_bytes >= p_sys->i_total_bytes )
1319             p_sys->i_read_bytes = p_sys->i_total_bytes = 0;
1320     }
1321
1322     while( i_mData_bytes < ioData->mBuffers[0].mDataByteSize )
1323     {
1324         /* We don't have enough data yet */
1325         aout_buffer_t * p_buffer;
1326         p_buffer = aout_OutputNextBuffer( p_aout, current_date , VLC_FALSE );
1327
1328         if( p_buffer != NULL )
1329         {
1330             uint32_t i_second_mData_bytes = __MIN( p_buffer->i_nb_bytes, ioData->mBuffers[0].mDataByteSize - i_mData_bytes );
1331
1332             p_aout->p_libvlc->pf_memcpy( (uint8_t *)ioData->mBuffers[0].mData + i_mData_bytes, p_buffer->p_buffer, i_second_mData_bytes );
1333             i_mData_bytes += i_second_mData_bytes;
1334
1335             if( i_mData_bytes >= ioData->mBuffers[0].mDataByteSize )
1336             {
1337                 p_sys->i_total_bytes = p_buffer->i_nb_bytes - i_second_mData_bytes;
1338                 p_aout->p_libvlc->pf_memcpy( p_sys->p_remainder_buffer, &p_buffer->p_buffer[i_second_mData_bytes], p_sys->i_total_bytes );
1339             }
1340             else
1341             {
1342                 /* update current_date */
1343                 current_date += (mtime_t) ( (mtime_t) 1000000 / p_aout->output.output.i_rate ) *
1344                                 ( i_second_mData_bytes / 4 / aout_FormatNbChannels( &p_aout->output.output )  ); // 4 is fl32 specific
1345             }
1346             aout_BufferFree( p_buffer );
1347         }
1348         else
1349         {
1350              p_aout->p_libvlc->pf_memset( (uint8_t *)ioData->mBuffers[0].mData +i_mData_bytes, 0, ioData->mBuffers[0].mDataByteSize - i_mData_bytes );
1351              i_mData_bytes += ioData->mBuffers[0].mDataByteSize - i_mData_bytes;
1352         }
1353     }
1354     return( noErr );
1355 }
1356
1357 /*****************************************************************************
1358  * RenderCallbackSPDIF: callback for SPDIF audio output
1359  *****************************************************************************/
1360 static OSStatus RenderCallbackSPDIF( AudioDeviceID inDevice,
1361                                     const AudioTimeStamp * inNow,
1362                                     const void * inInputData,
1363                                     const AudioTimeStamp * inInputTime,
1364                                     AudioBufferList * outOutputData,
1365                                     const AudioTimeStamp * inOutputTime,
1366                                     void * threadGlobals )
1367 {
1368     aout_buffer_t * p_buffer;
1369     mtime_t         current_date;
1370
1371     aout_instance_t * p_aout = (aout_instance_t *)threadGlobals;
1372     struct aout_sys_t * p_sys = p_aout->output.p_sys;
1373
1374     /* Check for the difference between the Device clock and mdate */
1375     p_sys->clock_diff = - (mtime_t)
1376         AudioConvertHostTimeToNanos( inNow->mHostTime ) / 1000;
1377     p_sys->clock_diff += mdate();
1378
1379     current_date = p_sys->clock_diff +
1380                    AudioConvertHostTimeToNanos( inOutputTime->mHostTime ) / 1000;
1381                    //- ((mtime_t) 1000000 / p_aout->output.output.i_rate * 31 ); // 31 = Latency in Frames. retrieve somewhere
1382
1383     p_buffer = aout_OutputNextBuffer( p_aout, current_date, VLC_TRUE );
1384
1385 #define BUFFER outOutputData->mBuffers[p_sys->i_stream_index]
1386     if( p_buffer != NULL )
1387     {
1388         if( (int)BUFFER.mDataByteSize != (int)p_buffer->i_nb_bytes)
1389             msg_Warn( p_aout, "bytesize: %d nb_bytes: %d", (int)BUFFER.mDataByteSize, (int)p_buffer->i_nb_bytes );
1390
1391         /* move data into output data buffer */
1392         p_aout->p_libvlc->pf_memcpy( BUFFER.mData,
1393                                   p_buffer->p_buffer, p_buffer->i_nb_bytes );
1394         aout_BufferFree( p_buffer );
1395     }
1396     else
1397     {
1398         p_aout->p_libvlc->pf_memset( BUFFER.mData, 0, BUFFER.mDataByteSize );
1399     }
1400 #undef BUFFER
1401
1402     return( noErr );
1403 }
1404
1405 /*****************************************************************************
1406  * HardwareListener: Warns us of changes in the list of registered devices
1407  *****************************************************************************/
1408 static OSStatus HardwareListener( AudioHardwarePropertyID inPropertyID,
1409                                   void * inClientData )
1410 {
1411     OSStatus err = noErr;
1412     aout_instance_t     *p_aout = (aout_instance_t *)inClientData;
1413
1414     switch( inPropertyID )
1415     {
1416         case kAudioHardwarePropertyDevices:
1417         {
1418             /* something changed in the list of devices */
1419             /* We trigger the audio-device's aout_ChannelsRestart callback */
1420             var_Change( p_aout, "audio-device", VLC_VAR_TRIGGER_CALLBACKS, NULL, NULL );
1421             var_Destroy( p_aout, "audio-device" );
1422         }
1423         break;
1424     }
1425
1426     return( err );
1427 }
1428
1429 /*****************************************************************************
1430  * StreamListener
1431  *****************************************************************************/
1432 static OSStatus StreamListener( AudioStreamID inStream,
1433                                 UInt32 inChannel,
1434                                 AudioDevicePropertyID inPropertyID,
1435                                 void * inClientData )
1436 {
1437     OSStatus err = noErr;
1438     struct { vlc_mutex_t lock; vlc_cond_t cond; } * w = inClientData;
1439
1440     switch( inPropertyID )
1441     {
1442         case kAudioStreamPropertyPhysicalFormat:
1443             vlc_mutex_lock( &w->lock );
1444             vlc_cond_signal( &w->cond );
1445             vlc_mutex_unlock( &w->lock );
1446             break;
1447
1448         default:
1449             break;
1450     }
1451     return( err );
1452 }
1453
1454 /*****************************************************************************
1455  * AudioDeviceCallback: Callback triggered when the audio-device variable is changed
1456  *****************************************************************************/
1457 static int AudioDeviceCallback( vlc_object_t *p_this, const char *psz_variable,
1458                      vlc_value_t old_val, vlc_value_t new_val, void *param )
1459 {
1460     aout_instance_t *p_aout = (aout_instance_t *)p_this;
1461     var_Set( p_aout->p_libvlc, "macosx-audio-device", new_val );
1462     msg_Dbg( p_aout, "Set Device: %#x", new_val.i_int );
1463     return aout_ChannelsRestart( p_this, psz_variable, old_val, new_val, param );
1464 }
1465