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 #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_dialog.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         dialog_Fatal( p_aout, _("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                 dialog_Fatal( p_aout, _("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