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, 2011 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Derk-Jan Hartman <hartman at videolan dot org>
   8  *          Felix Paul Kühne <fkuehne at videolan dot org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24
  25 /*****************************************************************************
  26  * Preamble
  27  *****************************************************************************/
  28 #ifdef HAVE_CONFIG_H
  29 # include "config.h"
  30 #endif
  31
  32 #include <unistd.h>
  33
  34 #include <vlc_common.h>
  35 #include <vlc_plugin.h>
  36 #include <vlc_dialog.h>
  37 #include <vlc_aout.h>
  38
  39 #include <CoreAudio/CoreAudio.h>
  40 #include <AudioUnit/AudioUnit.h>
  41 #include <AudioToolbox/AudioFormat.h>
  42
  43 #include <CoreServices/CoreServices.h>
  44
  45 #ifndef verify_noerr
  46 #define verify_noerr(a) assert((a) == noErr)
  47 #endif
  48
  49 #define STREAM_FORMAT_MSG( pre, sfm ) \
  50     pre "[%u][%4.4s][%u][%u][%u][%u][%u][%u]", \
  51     (UInt32)sfm.mSampleRate, (char *)&sfm.mFormatID, \
  52     sfm.mFormatFlags, sfm.mBytesPerPacket, \
  53     sfm.mFramesPerPacket, sfm.mBytesPerFrame, \
  54     sfm.mChannelsPerFrame, sfm.mBitsPerChannel
  55
  56 #define STREAM_FORMAT_MSG_FULL( pre, sfm ) \
  57     pre ":\nsamplerate: [%u]\nFormatID: [%4.4s]\nFormatFlags: [%u]\nBypesPerPacket: [%u]\nFramesPerPacket: [%u]\nBytesPerFrame: [%u]\nChannelsPerFrame: [%u]\nBitsPerChannel[%u]", \
  58     (UInt32)sfm.mSampleRate, (char *)&sfm.mFormatID, \
  59     sfm.mFormatFlags, sfm.mBytesPerPacket, \
  60     sfm.mFramesPerPacket, sfm.mBytesPerFrame, \
  61     sfm.mChannelsPerFrame, sfm.mBitsPerChannel
  62
  63 #define FRAMESIZE 2048
  64 #define BUFSIZE (FRAMESIZE * 8) * 8
  65 #define AOUT_VAR_SPDIF_FLAG 0xf00000
  66
  67 /*
  68  * TODO:
  69  * - clean up the debug info
  70  * - be better at changing stream setup or devices setup changes while playing.
  71  * - fix 6.1 and 7.1
  72  */
  73
  74 /*****************************************************************************
  75  * aout_sys_t: private audio output method descriptor
  76  *****************************************************************************
  77  * This structure is part of the audio output thread descriptor.
  78  * It describes the CoreAudio specific properties of an output thread.
  79  *****************************************************************************/
  80 struct aout_sys_t
  81 {
  82     AudioDeviceID               i_default_dev;  /* Keeps DeviceID of defaultOutputDevice */
  83     AudioDeviceID               i_selected_dev; /* Keeps DeviceID of the selected device */
  84     AudioDeviceIOProcID         i_procID;       /* DeviceID of current device */
  85     UInt32                      i_devices;      /* Number of CoreAudio Devices */
  86     bool                        b_supports_digital;/* Does the currently selected device support digital mode? */
  87     bool                        b_digital;      /* Are we running in digital mode? */
  88     mtime_t                     clock_diff;     /* Difference between VLC clock and Device clock */
  89
  90     /* AUHAL specific */
  91     Component                   au_component;   /* The Audiocomponent we use */
  92     AudioUnit                   au_unit;        /* The AudioUnit we use */
  93     uint8_t                     p_remainder_buffer[BUFSIZE];
  94     uint32_t                    i_read_bytes;
  95     uint32_t                    i_total_bytes;
  96
  97     /* CoreAudio SPDIF mode specific */
  98     pid_t                       i_hog_pid;      /* The keep the pid of our hog status */
  99     AudioStreamID               i_stream_id;    /* The StreamID that has a cac3 streamformat */
 100     int                         i_stream_index; /* The index of i_stream_id in an AudioBufferList */
 101     AudioStreamBasicDescription stream_format;  /* The format we changed the stream to */
 102     AudioStreamBasicDescription sfmt_revert;    /* The original format of the stream */
 103     bool                        b_revert;       /* Wether we need to revert the stream format */
 104     bool                        b_changed_mixing;/* Wether we need to set the mixing mode back */
 105 };
 106
 107 /*****************************************************************************
 108  * Local prototypes.
 109  *****************************************************************************/
 110 static int      Open                    ( vlc_object_t * );
 111 static int      OpenAnalog              ( aout_instance_t * );
 112 static int      OpenSPDIF               ( aout_instance_t * );
 113 static void     Close                   ( vlc_object_t * );
 114
 115 static void     Play                    ( aout_instance_t * );
 116 static void     Probe                   ( aout_instance_t * );
 117
 118 static int      AudioDeviceHasOutput    ( AudioDeviceID );
 119 static int      AudioDeviceSupportsDigital( aout_instance_t *, AudioDeviceID );
 120 static int      AudioStreamSupportsDigital( aout_instance_t *, AudioStreamID );
 121 static int      AudioStreamChangeFormat ( aout_instance_t *, AudioStreamID, AudioStreamBasicDescription );
 122
 123 static OSStatus RenderCallbackAnalog    ( vlc_object_t *, AudioUnitRenderActionFlags *, const AudioTimeStamp *,
 124                                           unsigned int, unsigned int, AudioBufferList *);
 125 static OSStatus RenderCallbackSPDIF     ( AudioDeviceID, const AudioTimeStamp *, const void *, const AudioTimeStamp *,
 126                                           AudioBufferList *, const AudioTimeStamp *, void * );
 127 static OSStatus HardwareListener        ( AudioHardwarePropertyID, void *);
 128 static OSStatus StreamListener          ( AudioStreamID, UInt32,
 129                                           AudioDevicePropertyID, void * );
 130 static int      AudioDeviceCallback     ( vlc_object_t *, const char *,
 131                                           vlc_value_t, vlc_value_t, void * );
 132
 133
 134
 135 /*****************************************************************************
 136  * Module descriptor
 137  *****************************************************************************/
 138 #define ADEV_TEXT N_("Audio Device")
 139 #define ADEV_LONGTEXT N_("Choose a number corresponding to the number of an " \
 140     "audio device, as listed in your 'Audio Device' menu. This device will " \
 141     "then be used by default for audio playback.")
 142
 143 vlc_module_begin ()
 144     set_shortname( "auhal" )
 145     set_description( N_("HAL AudioUnit output") )
 146     set_capability( "audio output", 101 )
 147     set_category( CAT_AUDIO )
 148     set_subcategory( SUBCAT_AUDIO_AOUT )
 149     set_callbacks( Open, Close )
 150     add_integer( "macosx-audio-device", 0, ADEV_TEXT, ADEV_LONGTEXT, false )
 151 vlc_module_end ()
 152
 153 /*****************************************************************************
 154  * Open: open macosx audio output
 155  *****************************************************************************/
 156 static int Open( vlc_object_t * p_this )
 157 {
 158     OSStatus                err = noErr;
 159     UInt32                  i_param_size = 0;
 160     struct aout_sys_t       *p_sys = NULL;
 161     vlc_value_t             val;
 162     aout_instance_t         *p_aout = (aout_instance_t *)p_this;
 163
 164     /* Use int here, to match kAudioDevicePropertyDeviceIsAlive
 165      * property size */
 166     int                     b_alive = false;
 167
 168     /* Allocate structure */
 169     p_aout->output.p_sys = malloc( sizeof( aout_sys_t ) );
 170     if( p_aout->output.p_sys == NULL )
 171         return VLC_ENOMEM;
 172
 173     p_sys = p_aout->output.p_sys;
 174     p_sys->i_default_dev = 0;
 175     p_sys->i_selected_dev = 0;
 176     p_sys->i_devices = 0;
 177     p_sys->b_supports_digital = false;
 178     p_sys->b_digital = false;
 179     p_sys->au_component = NULL;
 180     p_sys->au_unit = NULL;
 181     p_sys->clock_diff = (mtime_t) 0;
 182     p_sys->i_read_bytes = 0;
 183     p_sys->i_total_bytes = 0;
 184     p_sys->i_hog_pid = -1;
 185     p_sys->i_stream_id = 0;
 186     p_sys->i_stream_index = -1;
 187     p_sys->b_revert = false;
 188     p_sys->b_changed_mixing = false;
 189     memset( p_sys->p_remainder_buffer, 0, sizeof(uint8_t) * BUFSIZE );
 190
 191     p_aout->output.pf_play = Play;
 192
 193     aout_FormatPrint( p_aout, "VLC is looking for:", (audio_sample_format_t *)&p_aout->output.output );
 194
 195     /* Persistent device variable */
 196     if( var_Type( p_aout->p_libvlc, "macosx-audio-device" ) == 0 )
 197     {
 198         var_Create( p_aout->p_libvlc, "macosx-audio-device", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 199     }
 200
 201     /* Build a list of devices */
 202     if( var_Type( p_aout, "audio-device" ) == 0 )
 203     {
 204         Probe( p_aout );
 205     }
 206
 207     /* What device do we want? */
 208     if( var_Get( p_aout, "audio-device", &val ) < 0 )
 209     {
 210         msg_Err( p_aout, "audio-device var does not exist. device probe failed." );
 211         goto error;
 212     }
 213
 214     p_sys->i_selected_dev = val.i_int & ~AOUT_VAR_SPDIF_FLAG; /* remove SPDIF flag to get the true DeviceID */
 215     p_sys->b_supports_digital = ( val.i_int & AOUT_VAR_SPDIF_FLAG ) ? true : false;
 216
 217     /* Check if the desired device is alive and usable */
 218     /* TODO: add a callback to the device to alert us if the device dies */
 219     i_param_size = sizeof( b_alive );
 220     err = AudioDeviceGetProperty( p_sys->i_selected_dev, 0, FALSE,
 221                                   kAudioDevicePropertyDeviceIsAlive,
 222                                   &i_param_size, &b_alive );
 223
 224     if( err != noErr )
 225     {
 226         /* Be tolerant, only give a warning here */
 227         msg_Warn( p_aout, "could not check whether device [0x%x] is alive: %4.4s", (unsigned int)p_sys->i_selected_dev, (char *)&err );
 228         b_alive = false;
 229     }
 230
 231     if( !b_alive )
 232     {
 233         msg_Warn( p_aout, "selected audio device is not alive, switching to default device" );
 234         p_sys->i_selected_dev = p_sys->i_default_dev;
 235     }
 236
 237     i_param_size = sizeof( p_sys->i_hog_pid );
 238     err = AudioDeviceGetProperty( p_sys->i_selected_dev, 0, FALSE,
 239                                   kAudioDevicePropertyHogMode,
 240                                   &i_param_size, &p_sys->i_hog_pid );
 241
 242     if( err != noErr )
 243     {
 244         /* This is not a fatal error. Some drivers simply don't support this property */
 245         msg_Warn( p_aout, "could not check whether device is hogged: %4.4s",
 246                  (char *)&err );
 247         p_sys->i_hog_pid = -1;
 248     }
 249
 250     if( p_sys->i_hog_pid != -1 && p_sys->i_hog_pid != getpid() )
 251     {
 252         msg_Err( p_aout, "Selected audio device is exclusively in use by another program." );
 253         dialog_Fatal( p_aout, _("Audio output failed"), "%s",
 254                         _("The selected audio output device is exclusively in "
 255                           "use by another program.") );
 256         goto error;
 257     }
 258
 259     /* Check for Digital mode or Analog output mode */
 260     if( AOUT_FMT_NON_LINEAR( &p_aout->output.output ) && p_sys->b_supports_digital )
 261     {
 262         if( OpenSPDIF( p_aout ) )
 263             return VLC_SUCCESS;
 264     }
 265     else
 266     {
 267         if( OpenAnalog( p_aout ) )
 268             return VLC_SUCCESS;
 269     }
 270
 271 error:
 272     /* If we reach this, this aout has failed */
 273     var_Destroy( p_aout, "audio-device" );
 274     free( p_sys );
 275     return VLC_EGENERIC;
 276 }
 277
 278 /*****************************************************************************
 279  * Open: open and setup a HAL AudioUnit to do analog (multichannel) audio output
 280  *****************************************************************************/
 281 static int OpenAnalog( aout_instance_t *p_aout )
 282 {
 283     struct aout_sys_t           *p_sys = p_aout->output.p_sys;
 284     OSStatus                    err = noErr;
 285     UInt32                      i_param_size = 0, i = 0;
 286     int                         i_original;
 287     ComponentDescription        desc;
 288     AudioStreamBasicDescription DeviceFormat;
 289     AudioChannelLayout          *layout;
 290     AudioChannelLayout          new_layout;
 291     AURenderCallbackStruct      input;
 292
 293     /* Lets go find our Component */
 294     desc.componentType = kAudioUnitType_Output;
 295     desc.componentSubType = kAudioUnitSubType_HALOutput;
 296     desc.componentManufacturer = kAudioUnitManufacturer_Apple;
 297     desc.componentFlags = 0;
 298     desc.componentFlagsMask = 0;
 299
 300     p_sys->au_component = FindNextComponent( NULL, &desc );
 301     if( p_sys->au_component == NULL )
 302     {
 303         msg_Warn( p_aout, "we cannot find our HAL component" );
 304         return false;
 305     }
 306
 307     err = OpenAComponent( p_sys->au_component, &p_sys->au_unit );
 308     if( err != noErr )
 309     {
 310         msg_Warn( p_aout, "we cannot open our HAL component" );
 311         return false;
 312     }
 313
 314     /* Set the device we will use for this output unit */
 315     err = AudioUnitSetProperty( p_sys->au_unit,
 316                          kAudioOutputUnitProperty_CurrentDevice,
 317                          kAudioUnitScope_Global,
 318                          0,
 319                          &p_sys->i_selected_dev,
 320                          sizeof( AudioDeviceID ));
 321
 322     if( err != noErr )
 323     {
 324         msg_Warn( p_aout, "we cannot select the audio device" );
 325         return false;
 326     }
 327
 328     /* Get the current format */
 329     i_param_size = sizeof(AudioStreamBasicDescription);
 330
 331     err = AudioUnitGetProperty( p_sys->au_unit,
 332                                    kAudioUnitProperty_StreamFormat,
 333                                    kAudioUnitScope_Input,
 334                                    0,
 335                                    &DeviceFormat,
 336                                    &i_param_size );
 337
 338     if( err != noErr ) return false;
 339     else msg_Dbg( p_aout, STREAM_FORMAT_MSG( "current format is: ", DeviceFormat ) );
 340
 341     /* Get the channel layout of the device side of the unit (vlc -> unit -> device) */
 342     err = AudioUnitGetPropertyInfo( p_sys->au_unit,
 343                                    kAudioDevicePropertyPreferredChannelLayout,
 344                                    kAudioUnitScope_Output,
 345                                    0,
 346                                    &i_param_size,
 347                                    NULL );
 348
 349     if( err == noErr )
 350     {
 351         layout = (AudioChannelLayout *)malloc( i_param_size);
 352
 353         verify_noerr( AudioUnitGetProperty( p_sys->au_unit,
 354                                        kAudioDevicePropertyPreferredChannelLayout,
 355                                        kAudioUnitScope_Output,
 356                                        0,
 357                                        layout,
 358                                        &i_param_size ));
 359
 360         /* We need to "fill out" the ChannelLayout, because there are multiple ways that it can be set */
 361         if( layout->mChannelLayoutTag == kAudioChannelLayoutTag_UseChannelBitmap)
 362         {
 363             /* bitmap defined channellayout */
 364             verify_noerr( AudioFormatGetProperty( kAudioFormatProperty_ChannelLayoutForBitmap,
 365                                     sizeof( UInt32), &layout->mChannelBitmap,
 366                                     &i_param_size,
 367                                     layout ));
 368         }
 369         else if( layout->mChannelLayoutTag != kAudioChannelLayoutTag_UseChannelDescriptions )
 370         {
 371             /* layouttags defined channellayout */
 372             verify_noerr( AudioFormatGetProperty( kAudioFormatProperty_ChannelLayoutForTag,
 373                                     sizeof( AudioChannelLayoutTag ), &layout->mChannelLayoutTag,
 374                                     &i_param_size,
 375                                     layout ));
 376         }
 377
 378         msg_Dbg( p_aout, "layout of AUHAL has %d channels" , (int)layout->mNumberChannelDescriptions );
 379
 380         /* Initialize the VLC core channel count */
 381         p_aout->output.output.i_physical_channels = 0;
 382         i_original = p_aout->output.output.i_original_channels & AOUT_CHAN_PHYSMASK;
 383
 384         if( i_original == AOUT_CHAN_CENTER || layout->mNumberChannelDescriptions < 2 )
 385         {
 386             /* We only need Mono or cannot output more than 1 channel */
 387             p_aout->output.output.i_physical_channels = AOUT_CHAN_CENTER;
 388         }
 389         else if( i_original == (AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT) || layout->mNumberChannelDescriptions < 3 )
 390         {
 391             /* We only need Stereo or cannot output more than 2 channels */
 392             p_aout->output.output.i_physical_channels = AOUT_CHAN_RIGHT | AOUT_CHAN_LEFT;
 393         }
 394         else
 395         {
 396             /* We want more than stereo and we can do that */
 397             for( i = 0; i < layout->mNumberChannelDescriptions; i++ )
 398             {
 399                 msg_Dbg( p_aout, "this is channel: %d", (int)layout->mChannelDescriptions[i].mChannelLabel );
 400
 401                 switch( layout->mChannelDescriptions[i].mChannelLabel )
 402                 {
 403                     case kAudioChannelLabel_Left:
 404                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_LEFT;
 405                         continue;
 406                     case kAudioChannelLabel_Right:
 407                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_RIGHT;
 408                         continue;
 409                     case kAudioChannelLabel_Center:
 410                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_CENTER;
 411                         continue;
 412                     case kAudioChannelLabel_LFEScreen:
 413                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_LFE;
 414                         continue;
 415                     case kAudioChannelLabel_LeftSurround:
 416                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_REARLEFT;
 417                         continue;
 418                     case kAudioChannelLabel_RightSurround:
 419                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_REARRIGHT;
 420                         continue;
 421                     case kAudioChannelLabel_RearSurroundLeft:
 422                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_MIDDLELEFT;
 423                         continue;
 424                     case kAudioChannelLabel_RearSurroundRight:
 425                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_MIDDLERIGHT;
 426                         continue;
 427                     case kAudioChannelLabel_CenterSurround:
 428                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_REARCENTER;
 429                         continue;
 430                     default:
 431                         msg_Warn( p_aout, "unrecognized channel form provided by driver: %d", (int)layout->mChannelDescriptions[i].mChannelLabel );
 432                 }
 433             }
 434             if( p_aout->output.output.i_physical_channels == 0 )
 435             {
 436                 p_aout->output.output.i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
 437                 msg_Err( p_aout, "You should configure your speaker layout with Audio Midi Setup Utility in /Applications/Utilities. Now using Stereo mode." );
 438                 dialog_Fatal( p_aout, _("Audio device is not configured"), "%s",
 439                                 _("You should configure your speaker layout with "
 440                                   "the \"Audio Midi Setup\" utility in /Applications/"
 441                                   "Utilities. Stereo mode is being used now.") );
 442             }
 443         }
 444         free( layout );
 445     }
 446     else
 447     {
 448         msg_Warn( p_aout, "this driver does not support kAudioDevicePropertyPreferredChannelLayout. BAD DRIVER AUTHOR !!!" );
 449         p_aout->output.output.i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
 450     }
 451
 452     msg_Dbg( p_aout, "selected %d physical channels for device output", aout_FormatNbChannels( &p_aout->output.output ) );
 453     msg_Dbg( p_aout, "VLC will output: %s", aout_FormatPrintChannels( &p_aout->output.output ));
 454
 455     memset (&new_layout, 0, sizeof(new_layout));
 456     switch( aout_FormatNbChannels( &p_aout->output.output ) )
 457     {
 458         case 1:
 459             new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_Mono;
 460             break;
 461         case 2:
 462             new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_Stereo;
 463             break;
 464         case 3:
 465             if( p_aout->output.output.i_physical_channels & AOUT_CHAN_CENTER )
 466             {
 467                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_7; // L R C
 468             }
 469             else if( p_aout->output.output.i_physical_channels & AOUT_CHAN_LFE )
 470             {
 471                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_4; // L R LFE
 472             }
 473             break;
 474         case 4:
 475             if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_CENTER | AOUT_CHAN_LFE ) )
 476             {
 477                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_10; // L R C LFE
 478             }
 479             else if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT ) )
 480             {
 481                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_3; // L R Ls Rs
 482             }
 483             else if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_CENTER | AOUT_CHAN_REARCENTER ) )
 484             {
 485                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_3; // L R C Cs
 486             }
 487             break;
 488         case 5:
 489             if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_CENTER ) )
 490             {
 491                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_19; // L R Ls Rs C
 492             }
 493             else if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_LFE ) )
 494             {
 495                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_18; // L R Ls Rs LFE
 496             }
 497             break;
 498         case 6:
 499             if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_LFE ) )
 500             {
 501                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_20; // L R Ls Rs C LFE
 502             }
 503             else
 504             {
 505                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_AudioUnit_6_0; // L R Ls Rs C Cs
 506             }
 507             break;
 508         case 7:
 509             /* FIXME: This is incorrect. VLC uses the internal ordering: L R Lm Rm Lr Rr C LFE but this is wrong */
 510             new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_MPEG_6_1_A; // L R C LFE Ls Rs Cs
 511             break;
 512         case 8:
 513             /* FIXME: This is incorrect. VLC uses the internal ordering: L R Lm Rm Lr Rr C LFE but this is wrong */
 514             new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_MPEG_7_1_A; // L R C LFE Ls Rs Lc Rc
 515             break;
 516     }
 517
 518     /* Set up the format to be used */
 519     DeviceFormat.mSampleRate = p_aout->output.output.i_rate;
 520     DeviceFormat.mFormatID = kAudioFormatLinearPCM;
 521
 522     /* We use float 32. It's the best supported format by both VLC and Coreaudio */
 523     p_aout->output.output.i_format = VLC_CODEC_FL32;
 524     DeviceFormat.mFormatFlags = kAudioFormatFlagsNativeFloatPacked;
 525     DeviceFormat.mBitsPerChannel = 32;
 526     DeviceFormat.mChannelsPerFrame = aout_FormatNbChannels( &p_aout->output.output );
 527
 528     /* Calculate framesizes and stuff */
 529     DeviceFormat.mFramesPerPacket = 1;
 530     DeviceFormat.mBytesPerFrame = DeviceFormat.mBitsPerChannel * DeviceFormat.mChannelsPerFrame / 8;
 531     DeviceFormat.mBytesPerPacket = DeviceFormat.mBytesPerFrame * DeviceFormat.mFramesPerPacket;
 532
 533     /* Set the desired format */
 534     i_param_size = sizeof(AudioStreamBasicDescription);
 535     verify_noerr( AudioUnitSetProperty( p_sys->au_unit,
 536                                    kAudioUnitProperty_StreamFormat,
 537                                    kAudioUnitScope_Input,
 538                                    0,
 539                                    &DeviceFormat,
 540                                    i_param_size ));
 541
 542     msg_Dbg( p_aout, STREAM_FORMAT_MSG( "we set the AU format: " , DeviceFormat ) );
 543
 544     /* Retrieve actual format */
 545     verify_noerr( AudioUnitGetProperty( p_sys->au_unit,
 546                                    kAudioUnitProperty_StreamFormat,
 547                                    kAudioUnitScope_Input,
 548                                    0,
 549                                    &DeviceFormat,
 550                                    &i_param_size ));
 551
 552     msg_Dbg( p_aout, STREAM_FORMAT_MSG( "the actual set AU format is " , DeviceFormat ) );
 553
 554     /* Do the last VLC aout setups */
 555     aout_FormatPrepare( &p_aout->output.output );
 556     p_aout->output.i_nb_samples = FRAMESIZE;
 557     aout_VolumeSoftInit( p_aout );
 558
 559     /* set the IOproc callback */
 560     input.inputProc = (AURenderCallback) RenderCallbackAnalog;
 561     input.inputProcRefCon = p_aout;
 562
 563     verify_noerr( AudioUnitSetProperty( p_sys->au_unit,
 564                             kAudioUnitProperty_SetRenderCallback,
 565                             kAudioUnitScope_Input,
 566                             0, &input, sizeof( input ) ) );
 567
 568     input.inputProc = (AURenderCallback) RenderCallbackAnalog;
 569     input.inputProcRefCon = p_aout;
 570
 571     /* Set the new_layout as the layout VLC will use to feed the AU unit */
 572     verify_noerr( AudioUnitSetProperty( p_sys->au_unit,
 573                             kAudioUnitProperty_AudioChannelLayout,
 574                             kAudioUnitScope_Input,
 575                             0, &new_layout, sizeof(new_layout) ) );
 576
 577     if( new_layout.mNumberChannelDescriptions > 0 )
 578         free( new_layout.mChannelDescriptions );
 579
 580     /* AU initiliaze */
 581     verify_noerr( AudioUnitInitialize(p_sys->au_unit) );
 582
 583     /* Find the difference between device clock and mdate clock */
 584     p_sys->clock_diff = - (mtime_t)
 585         AudioConvertHostTimeToNanos( AudioGetCurrentHostTime() ) / 1000;
 586     p_sys->clock_diff += mdate();
 587
 588     /* Start the AU */
 589     verify_noerr( AudioOutputUnitStart(p_sys->au_unit) );
 590
 591     return true;
 592 }
 593
 594 /*****************************************************************************
 595  * Setup a encoded digital stream (SPDIF)
 596  *****************************************************************************/
 597 static int OpenSPDIF( aout_instance_t * p_aout )
 598 {
 599     struct aout_sys_t       *p_sys = p_aout->output.p_sys;
 600     OSStatus                err = noErr;
 601     UInt32                  i_param_size = 0, b_mix = 0;
 602     Boolean                 b_writeable = false;
 603     AudioStreamID           *p_streams = NULL;
 604     int                     i = 0, i_streams = 0;
 605
 606     /* Start doing the SPDIF setup proces */
 607     p_sys->b_digital = true;
 608
 609     /* Hog the device */
 610     i_param_size = sizeof( p_sys->i_hog_pid );
 611     p_sys->i_hog_pid = getpid() ;
 612
 613     err = AudioDeviceSetProperty( p_sys->i_selected_dev, 0, 0, FALSE,
 614                                   kAudioDevicePropertyHogMode, i_param_size, &p_sys->i_hog_pid );
 615
 616     if( err != noErr )
 617     {
 618         msg_Err( p_aout, "failed to set hogmode: [%4.4s]", (char *)&err );
 619         return false;
 620     }
 621
 622     /* Set mixable to false if we are allowed to */
 623     err = AudioDeviceGetPropertyInfo( p_sys->i_selected_dev, 0, FALSE, kAudioDevicePropertySupportsMixing,
 624                                     &i_param_size, &b_writeable );
 625
 626     err = AudioDeviceGetProperty( p_sys->i_selected_dev, 0, FALSE, kAudioDevicePropertySupportsMixing,
 627                                     &i_param_size, &b_mix );
 628
 629     if( !err && b_writeable )
 630     {
 631         b_mix = 0;
 632         err = AudioDeviceSetProperty( p_sys->i_selected_dev, 0, 0, FALSE,
 633                             kAudioDevicePropertySupportsMixing, i_param_size, &b_mix );
 634         p_sys->b_changed_mixing = true;
 635     }
 636
 637     if( err != noErr )
 638     {
 639         msg_Err( p_aout, "failed to set mixmode: [%4.4s]", (char *)&err );
 640         return false;
 641     }
 642
 643     /* Get a list of all the streams on this device */
 644     err = AudioDeviceGetPropertyInfo( p_sys->i_selected_dev, 0, FALSE,
 645                                       kAudioDevicePropertyStreams,
 646                                       &i_param_size, NULL );
 647     if( err != noErr )
 648     {
 649         msg_Err( p_aout, "could not get number of streams: [%4.4s]", (char *)&err );
 650         return false;
 651     }
 652
 653     i_streams = i_param_size / sizeof( AudioStreamID );
 654     p_streams = (AudioStreamID *)malloc( i_param_size );
 655     if( p_streams == NULL )
 656         return false;
 657
 658     err = AudioDeviceGetProperty( p_sys->i_selected_dev, 0, FALSE,
 659                                     kAudioDevicePropertyStreams,
 660                                     &i_param_size, p_streams );
 661
 662     if( err != noErr )
 663     {
 664         msg_Err( p_aout, "could not get number of streams: [%4.4s]", (char *)&err );
 665         free( p_streams );
 666         return false;
 667     }
 668
 669     for( i = 0; i < i_streams && p_sys->i_stream_index < 0 ; i++ )
 670     {
 671         /* Find a stream with a cac3 stream */
 672         AudioStreamBasicDescription *p_format_list = NULL;
 673         int                         i_formats = 0, j = 0;
 674         bool                  b_digital = false;
 675
 676         /* Retrieve all the stream formats supported by each output stream */
 677         err = AudioStreamGetPropertyInfo( p_streams[i], 0,
 678                                           kAudioStreamPropertyPhysicalFormats,
 679                                           &i_param_size, NULL );
 680         if( err != noErr )
 681         {
 682             msg_Err( p_aout, "could not get number of streamformats: [%4.4s]", (char *)&err );
 683             continue;
 684         }
 685
 686         i_formats = i_param_size / sizeof( AudioStreamBasicDescription );
 687         p_format_list = (AudioStreamBasicDescription *)malloc( i_param_size );
 688         if( p_format_list == NULL )
 689             continue;
 690
 691         err = AudioStreamGetProperty( p_streams[i], 0,
 692                                           kAudioStreamPropertyPhysicalFormats,
 693                                           &i_param_size, p_format_list );
 694         if( err != noErr )
 695         {
 696             msg_Err( p_aout, "could not get the list of streamformats: [%4.4s]", (char *)&err );
 697             free( p_format_list );
 698             continue;
 699         }
 700
 701         /* Check if one of the supported formats is a digital format */
 702         for( j = 0; j < i_formats; j++ )
 703         {
 704             if( p_format_list[j].mFormatID == 'IAC3' ||
 705                   p_format_list[j].mFormatID == kAudioFormat60958AC3 )
 706             {
 707                 b_digital = true;
 708                 break;
 709             }
 710         }
 711
 712         if( b_digital )
 713         {
 714             /* if this stream supports a digital (cac3) format, then go set it. */
 715             int i_requested_rate_format = -1;
 716             int i_current_rate_format = -1;
 717             int i_backup_rate_format = -1;
 718
 719             p_sys->i_stream_id = p_streams[i];
 720             p_sys->i_stream_index = i;
 721
 722             if( !p_sys->b_revert )
 723             {
 724                 /* Retrieve the original format of this stream first if not done so already */
 725                 i_param_size = sizeof( p_sys->sfmt_revert );
 726                 err = AudioStreamGetProperty( p_sys->i_stream_id, 0,
 727                                               kAudioStreamPropertyPhysicalFormat,
 728                                               &i_param_size,
 729                                               &p_sys->sfmt_revert );
 730                 if( err != noErr )
 731                 {
 732                     msg_Err( p_aout, "could not retrieve the original streamformat: [%4.4s]", (char *)&err );
 733                     continue;
 734                 }
 735                 p_sys->b_revert = true;
 736             }
 737
 738             for( j = 0; j < i_formats; j++ )
 739             {
 740                 if( p_format_list[j].mFormatID == 'IAC3' ||
 741                       p_format_list[j].mFormatID == kAudioFormat60958AC3 )
 742                 {
 743                     if( p_format_list[j].mSampleRate == p_aout->output.output.i_rate )
 744                     {
 745                         i_requested_rate_format = j;
 746                         break;
 747                     }
 748                     else if( p_format_list[j].mSampleRate == p_sys->sfmt_revert.mSampleRate )
 749                     {
 750                         i_current_rate_format = j;
 751                     }
 752                     else
 753                     {
 754                         if( i_backup_rate_format < 0 || p_format_list[j].mSampleRate > p_format_list[i_backup_rate_format].mSampleRate )
 755                             i_backup_rate_format = j;
 756                     }
 757                 }
 758
 759             }
 760
 761             if( i_requested_rate_format >= 0 ) /* We prefer to output at the samplerate of the original audio */
 762                 p_sys->stream_format = p_format_list[i_requested_rate_format];
 763             else if( i_current_rate_format >= 0 ) /* If not possible, we will try to use the current samplerate of the device */
 764                 p_sys->stream_format = p_format_list[i_current_rate_format];
 765             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) */
 766         }
 767         free( p_format_list );
 768     }
 769     free( p_streams );
 770
 771     msg_Dbg( p_aout, STREAM_FORMAT_MSG( "original stream format: ", p_sys->sfmt_revert ) );
 772
 773     if( !AudioStreamChangeFormat( p_aout, p_sys->i_stream_id, p_sys->stream_format ) )
 774         return false;
 775
 776     /* Set the format flags */
 777     if( p_sys->stream_format.mFormatFlags & kAudioFormatFlagIsBigEndian )
 778         p_aout->output.output.i_format = VLC_CODEC_SPDIFB;
 779     else
 780         p_aout->output.output.i_format = VLC_CODEC_SPDIFL;
 781     p_aout->output.output.i_bytes_per_frame = AOUT_SPDIF_SIZE;
 782     p_aout->output.output.i_frame_length = A52_FRAME_NB;
 783     p_aout->output.i_nb_samples = p_aout->output.output.i_frame_length;
 784     p_aout->output.output.i_rate = (unsigned int)p_sys->stream_format.mSampleRate;
 785     aout_FormatPrepare( &p_aout->output.output );
 786     aout_VolumeNoneInit( p_aout );
 787
 788     /* Add IOProc callback */
 789     err = AudioDeviceCreateIOProcID( p_sys->i_selected_dev,
 790                                    (AudioDeviceIOProc)RenderCallbackSPDIF,
 791                                    (void *)p_aout,
 792                                    &p_sys->i_procID );
 793     if( err != noErr )
 794     {
 795         msg_Err( p_aout, "AudioDeviceCreateIOProcID failed: [%4.4s]", (char *)&err );
 796         return false;
 797     }
 798
 799     /* Check for the difference between the Device clock and mdate */
 800     p_sys->clock_diff = - (mtime_t)
 801         AudioConvertHostTimeToNanos( AudioGetCurrentHostTime() ) / 1000;
 802     p_sys->clock_diff += mdate();
 803
 804     /* Start device */
 805     err = AudioDeviceStart( p_sys->i_selected_dev, p_sys->i_procID );
 806     if( err != noErr )
 807     {
 808         msg_Err( p_aout, "AudioDeviceStart failed: [%4.4s]", (char *)&err );
 809
 810         err = AudioDeviceDestroyIOProcID( p_sys->i_selected_dev,
 811                                           p_sys->i_procID );
 812         if( err != noErr )
 813         {
 814             msg_Err( p_aout, "AudioDeviceDestroyIOProcID failed: [%4.4s]", (char *)&err );
 815         }
 816         return false;
 817     }
 818
 819     return true;
 820 }
 821
 822
 823 /*****************************************************************************
 824  * Close: Close HAL AudioUnit
 825  *****************************************************************************/
 826 static void Close( vlc_object_t * p_this )
 827 {
 828     aout_instance_t     *p_aout = (aout_instance_t *)p_this;
 829     struct aout_sys_t   *p_sys = p_aout->output.p_sys;
 830     OSStatus            err = noErr;
 831     UInt32              i_param_size = 0;
 832
 833     if( p_sys->au_unit )
 834     {
 835         verify_noerr( AudioOutputUnitStop( p_sys->au_unit ) );
 836         verify_noerr( AudioUnitUninitialize( p_sys->au_unit ) );
 837         verify_noerr( CloseComponent( p_sys->au_unit ) );
 838     }
 839
 840     if( p_sys->b_digital )
 841     {
 842         /* Stop device */
 843         err = AudioDeviceStop( p_sys->i_selected_dev,
 844                                p_sys->i_procID );
 845         if( err != noErr )
 846         {
 847             msg_Err( p_aout, "AudioDeviceStop failed: [%4.4s]", (char *)&err );
 848         }
 849
 850         /* Remove IOProc callback */
 851         err = AudioDeviceDestroyIOProcID( p_sys->i_selected_dev,
 852                                           p_sys->i_procID );
 853         if( err != noErr )
 854         {
 855             msg_Err( p_aout, "AudioDeviceDestroyIOProcID failed: [%4.4s]", (char *)&err );
 856         }
 857
 858         if( p_sys->b_revert )
 859         {
 860             AudioStreamChangeFormat( p_aout, p_sys->i_stream_id, p_sys->sfmt_revert );
 861         }
 862
 863         if( p_sys->b_changed_mixing && p_sys->sfmt_revert.mFormatID != kAudioFormat60958AC3 )
 864         {
 865             int b_mix;
 866             Boolean b_writeable;
 867             /* Revert mixable to true if we are allowed to */
 868             err = AudioDeviceGetPropertyInfo( p_sys->i_selected_dev, 0, FALSE, kAudioDevicePropertySupportsMixing,
 869                                         &i_param_size, &b_writeable );
 870
 871             err = AudioDeviceGetProperty( p_sys->i_selected_dev, 0, FALSE, kAudioDevicePropertySupportsMixing,
 872                                         &i_param_size, &b_mix );
 873
 874             if( !err && b_writeable )
 875             {
 876                 msg_Dbg( p_aout, "mixable is: %d", b_mix );
 877                 b_mix = 1;
 878                 err = AudioDeviceSetProperty( p_sys->i_selected_dev, 0, 0, FALSE,
 879                                     kAudioDevicePropertySupportsMixing, i_param_size, &b_mix );
 880             }
 881
 882             if( err != noErr )
 883             {
 884                 msg_Err( p_aout, "failed to set mixmode: [%4.4s]", (char *)&err );
 885             }
 886         }
 887     }
 888
 889     err = AudioHardwareRemovePropertyListener( kAudioHardwarePropertyDevices,
 890                                                HardwareListener );
 891
 892     if( err != noErr )
 893     {
 894         msg_Err( p_aout, "AudioHardwareRemovePropertyListener failed: [%4.4s]", (char *)&err );
 895     }
 896
 897     if( p_sys->i_hog_pid == getpid() )
 898     {
 899         p_sys->i_hog_pid = -1;
 900         i_param_size = sizeof( p_sys->i_hog_pid );
 901         err = AudioDeviceSetProperty( p_sys->i_selected_dev, 0, 0, FALSE,
 902                                          kAudioDevicePropertyHogMode, i_param_size, &p_sys->i_hog_pid );
 903         if( err != noErr ) msg_Err( p_aout, "Could not release hogmode: [%4.4s]", (char *)&err );
 904     }
 905
 906     free( p_sys );
 907 }
 908
 909 /*****************************************************************************
 910  * Play: nothing to do
 911  *****************************************************************************/
 912 static void Play( aout_instance_t * p_aout )
 913 {
 914     VLC_UNUSED(p_aout);
 915 }
 916
 917
 918 /*****************************************************************************
 919  * Probe: Check which devices the OS has, and add them to our audio-device menu
 920  *****************************************************************************/
 921 static void Probe( aout_instance_t * p_aout )
 922 {
 923     OSStatus            err = noErr;
 924     UInt32              i = 0, i_param_size = 0;
 925     AudioDeviceID       devid_def = 0;
 926     AudioDeviceID       *p_devices = NULL;
 927     vlc_value_t         val, text;
 928
 929     struct aout_sys_t   *p_sys = p_aout->output.p_sys;
 930
 931     /* Get number of devices */
 932     err = AudioHardwareGetPropertyInfo( kAudioHardwarePropertyDevices,
 933                                         &i_param_size, NULL );
 934     if( err != noErr )
 935     {
 936         msg_Err( p_aout, "Could not get number of devices: [%4.4s]", (char *)&err );
 937         goto error;
 938     }
 939
 940     p_sys->i_devices = i_param_size / sizeof( AudioDeviceID );
 941
 942     if( p_sys->i_devices < 1 )
 943     {
 944         msg_Err( p_aout, "No audio output devices were found." );
 945         goto error;
 946     }
 947
 948     msg_Dbg( p_aout, "system has [%u] device(s)", p_sys->i_devices );
 949
 950     /* Allocate DeviceID array */
 951     p_devices = (AudioDeviceID*)malloc( sizeof(AudioDeviceID) * p_sys->i_devices );
 952     if( p_devices == NULL )
 953         goto error;
 954
 955     /* Populate DeviceID array */
 956     err = AudioHardwareGetProperty( kAudioHardwarePropertyDevices,
 957                                     &i_param_size, p_devices );
 958     if( err != noErr )
 959     {
 960         msg_Err( p_aout, "could not get the device IDs: [%4.4s]", (char *)&err );
 961         goto error;
 962     }
 963
 964     /* Find the ID of the default Device */
 965     i_param_size = sizeof( AudioDeviceID );
 966     err = AudioHardwareGetProperty( kAudioHardwarePropertyDefaultOutputDevice,
 967                                     &i_param_size, &devid_def );
 968     if( err != noErr )
 969     {
 970         msg_Err( p_aout, "could not get default audio device: [%4.4s]", (char *)&err );
 971         goto error;
 972     }
 973     p_sys->i_default_dev = devid_def;
 974
 975     var_Create( p_aout, "audio-device", VLC_VAR_INTEGER|VLC_VAR_HASCHOICE );
 976     text.psz_string = (char*)_("Audio Device");
 977     var_Change( p_aout, "audio-device", VLC_VAR_SETTEXT, &text, NULL );
 978
 979     for( i = 0; i < p_sys->i_devices; i++ )
 980     {
 981         char *psz_name;
 982         i_param_size = 0;
 983
 984         /* Retrieve the length of the device name */
 985         err = AudioDeviceGetPropertyInfo(
 986                     p_devices[i], 0, false,
 987                     kAudioDevicePropertyDeviceName,
 988                     &i_param_size, NULL);
 989         if( err ) goto error;
 990
 991         /* Retrieve the name of the device */
 992         psz_name = (char *)malloc( i_param_size );
 993         err = AudioDeviceGetProperty(
 994                     p_devices[i], 0, false,
 995                     kAudioDevicePropertyDeviceName,
 996                     &i_param_size, psz_name);
 997         if( err ) goto error;
 998
 999         msg_Dbg( p_aout, "DevID: %u DevName: %s", p_devices[i], psz_name );
1000
1001         if( !AudioDeviceHasOutput( p_devices[i]) )
1002         {
1003             msg_Dbg( p_aout, "this device is INPUT only. skipping..." );
1004             free( psz_name );
1005             continue;
1006         }
1007
1008         /* Add the menu entries */
1009         val.i_int = (int)p_devices[i];
1010         text.psz_string = psz_name;
1011         var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
1012         text.psz_string = NULL;
1013         if( p_sys->i_default_dev == p_devices[i] )
1014         {
1015             /* The default device is the selected device normally */
1016             var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
1017             var_Set( p_aout, "audio-device", val );
1018         }
1019
1020         if( AudioDeviceSupportsDigital( p_aout, p_devices[i] ) )
1021         {
1022             val.i_int = (int)p_devices[i] | AOUT_VAR_SPDIF_FLAG;
1023             if( asprintf( &text.psz_string, _("%s (Encoded Output)"), psz_name ) != -1 )
1024             {
1025                 var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
1026                 free( text.psz_string );
1027                 if( p_sys->i_default_dev == p_devices[i]
1028                  && var_InheritBool( p_aout, "spdif" ) )
1029                 {
1030                     /* We selected to prefer SPDIF output if available
1031                      * then this "dummy" entry should be selected */
1032                     var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
1033                     var_Set( p_aout, "audio-device", val );
1034                 }
1035             }
1036         }
1037
1038         free( psz_name);
1039     }
1040
1041     /* If a device is already "preselected", then use this device */
1042     var_Get( p_aout->p_libvlc, "macosx-audio-device", &val );
1043     if( val.i_int > 0 )
1044     {
1045         var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
1046         var_Set( p_aout, "audio-device", val );
1047     }
1048
1049     /* If we change the device we want to use, we should renegotiate the audio chain */
1050     var_AddCallback( p_aout, "audio-device", AudioDeviceCallback, NULL );
1051
1052     /* Attach a Listener so that we are notified of a change in the Device setup */
1053     err = AudioHardwareAddPropertyListener( kAudioHardwarePropertyDevices,
1054                                             HardwareListener,
1055                                             (void *)p_aout );
1056     if( err )
1057         goto error;
1058
1059     free( p_devices );
1060     return;
1061
1062 error:
1063     msg_Warn( p_aout, "audio device already in use" );
1064     free( p_devices );
1065     return;
1066 }
1067
1068 /*****************************************************************************
1069  * AudioDeviceHasOutput: Checks if the Device actually provides any outputs at all
1070  *****************************************************************************/
1071 static int AudioDeviceHasOutput( AudioDeviceID i_dev_id )
1072 {
1073     UInt32            dataSize;
1074     Boolean            isWritable;
1075
1076     verify_noerr( AudioDeviceGetPropertyInfo( i_dev_id, 0, FALSE, kAudioDevicePropertyStreams, &dataSize, &isWritable) );
1077     if (dataSize == 0) return FALSE;
1078
1079     return TRUE;
1080 }
1081
1082 /*****************************************************************************
1083  * AudioDeviceSupportsDigital: Check i_dev_id for digital stream support.
1084  *****************************************************************************/
1085 static int AudioDeviceSupportsDigital( aout_instance_t *p_aout, AudioDeviceID i_dev_id )
1086 {
1087     OSStatus                    err = noErr;
1088     UInt32                      i_param_size = 0;
1089     AudioStreamID               *p_streams = NULL;
1090     int                         i = 0, i_streams = 0;
1091     bool                  b_return = false;
1092
1093     /* Retrieve all the output streams */
1094     err = AudioDeviceGetPropertyInfo( i_dev_id, 0, FALSE,
1095                                       kAudioDevicePropertyStreams,
1096                                       &i_param_size, NULL );
1097     if( err != noErr )
1098     {
1099         msg_Err( p_aout, "could not get number of streams: [%4.4s]", (char *)&err );
1100         return false;
1101     }
1102
1103     i_streams = i_param_size / sizeof( AudioStreamID );
1104     p_streams = (AudioStreamID *)malloc( i_param_size );
1105     if( p_streams == NULL )
1106         return VLC_ENOMEM;
1107
1108     err = AudioDeviceGetProperty( i_dev_id, 0, FALSE,
1109                                     kAudioDevicePropertyStreams,
1110                                     &i_param_size, p_streams );
1111
1112     if( err != noErr )
1113     {
1114         msg_Err( p_aout, "could not get number of streams: [%4.4s]", (char *)&err );
1115         return false;
1116     }
1117
1118     for( i = 0; i < i_streams; i++ )
1119     {
1120         if( AudioStreamSupportsDigital( p_aout, p_streams[i] ) )
1121             b_return = true;
1122     }
1123
1124     free( p_streams );
1125     return b_return;
1126 }
1127
1128 /*****************************************************************************
1129  * AudioStreamSupportsDigital: Check i_stream_id for digital stream support.
1130  *****************************************************************************/
1131 static int AudioStreamSupportsDigital( aout_instance_t *p_aout, AudioStreamID i_stream_id )
1132 {
1133     OSStatus                    err = noErr;
1134     UInt32                      i_param_size = 0;
1135     AudioStreamBasicDescription *p_format_list = NULL;
1136     int                         i = 0, i_formats = 0;
1137     bool                  b_return = false;
1138
1139     /* Retrieve all the stream formats supported by each output stream */
1140     err = AudioStreamGetPropertyInfo( i_stream_id, 0,
1141                                       kAudioStreamPropertyPhysicalFormats,
1142                                       &i_param_size, NULL );
1143     if( err != noErr )
1144     {
1145         msg_Err( p_aout, "could not get number of streamformats: [%4.4s]", (char *)&err );
1146         return false;
1147     }
1148
1149     i_formats = i_param_size / sizeof( AudioStreamBasicDescription );
1150     p_format_list = (AudioStreamBasicDescription *)malloc( i_param_size );
1151     if( p_format_list == NULL )
1152         return false;
1153
1154     err = AudioStreamGetProperty( i_stream_id, 0,
1155                                       kAudioStreamPropertyPhysicalFormats,
1156                                       &i_param_size, p_format_list );
1157     if( err != noErr )
1158     {
1159         msg_Err( p_aout, "could not get the list of streamformats: [%4.4s]", (char *)&err );
1160         free( p_format_list);
1161         p_format_list = NULL;
1162         return false;
1163     }
1164
1165     for( i = 0; i < i_formats; i++ )
1166     {
1167         msg_Dbg( p_aout, STREAM_FORMAT_MSG( "supported format: ", p_format_list[i] ) );
1168
1169         if( p_format_list[i].mFormatID == 'IAC3' ||
1170                   p_format_list[i].mFormatID == kAudioFormat60958AC3 )
1171         {
1172             b_return = true;
1173         }
1174     }
1175
1176     free( p_format_list );
1177     return b_return;
1178 }
1179
1180 /*****************************************************************************
1181  * AudioStreamChangeFormat: Change i_stream_id to change_format
1182  *****************************************************************************/
1183 static int AudioStreamChangeFormat( aout_instance_t *p_aout, AudioStreamID i_stream_id, AudioStreamBasicDescription change_format )
1184 {
1185     OSStatus            err = noErr;
1186     UInt32              i_param_size = 0;
1187     int i;
1188
1189     struct { vlc_mutex_t lock; vlc_cond_t cond; } w;
1190
1191     msg_Dbg( p_aout, STREAM_FORMAT_MSG( "setting stream format: ", change_format ) );
1192
1193     /* Condition because SetProperty is asynchronious */
1194     vlc_cond_init( &w.cond );
1195     vlc_mutex_init( &w.lock );
1196     vlc_mutex_lock( &w.lock );
1197
1198     /* Install the callback */
1199     err = AudioStreamAddPropertyListener( i_stream_id, 0,
1200                                       kAudioStreamPropertyPhysicalFormat,
1201                                       StreamListener, (void *)&w );
1202     if( err != noErr )
1203     {
1204         msg_Err( p_aout, "AudioStreamAddPropertyListener failed: [%4.4s]", (char *)&err );
1205         return false;
1206     }
1207
1208     /* change the format */
1209     err = AudioStreamSetProperty( i_stream_id, 0, 0,
1210                                   kAudioStreamPropertyPhysicalFormat,
1211                                   sizeof( AudioStreamBasicDescription ),
1212                                   &change_format );
1213     if( err != noErr )
1214     {
1215         msg_Err( p_aout, "could not set the stream format: [%4.4s]", (char *)&err );
1216         return false;
1217     }
1218
1219     /* The AudioStreamSetProperty is not only asynchronious (requiring the locks)
1220      * it is also not atomic in its behaviour.
1221      * Therefore we check 5 times before we really give up.
1222      * FIXME: failing isn't actually implemented yet. */
1223     for( i = 0; i < 5; i++ )
1224     {
1225         AudioStreamBasicDescription actual_format;
1226         mtime_t timeout = mdate() + 500000;
1227
1228         if( vlc_cond_timedwait( &w.cond, &w.lock, timeout ) )
1229         {
1230             msg_Dbg( p_aout, "reached timeout" );
1231         }
1232
1233         i_param_size = sizeof( AudioStreamBasicDescription );
1234         err = AudioStreamGetProperty( i_stream_id, 0,
1235                                       kAudioStreamPropertyPhysicalFormat,
1236                                       &i_param_size,
1237                                       &actual_format );
1238
1239         msg_Dbg( p_aout, STREAM_FORMAT_MSG( "actual format in use: ", actual_format ) );
1240         if( actual_format.mSampleRate == change_format.mSampleRate &&
1241             actual_format.mFormatID == change_format.mFormatID &&
1242             actual_format.mFramesPerPacket == change_format.mFramesPerPacket )
1243         {
1244             /* The right format is now active */
1245             break;
1246         }
1247         /* We need to check again */
1248     }
1249
1250     /* Removing the property listener */
1251     err = AudioStreamRemovePropertyListener( i_stream_id, 0,
1252                                             kAudioStreamPropertyPhysicalFormat,
1253                                             StreamListener );
1254     if( err != noErr )
1255     {
1256         msg_Err( p_aout, "AudioStreamRemovePropertyListener failed: [%4.4s]", (char *)&err );
1257         return false;
1258     }
1259
1260     /* Destroy the lock and condition */
1261     vlc_mutex_unlock( &w.lock );
1262     vlc_mutex_destroy( &w.lock );
1263     vlc_cond_destroy( &w.cond );
1264
1265     return true;
1266 }
1267
1268 /*****************************************************************************
1269  * RenderCallbackAnalog: This function is called everytime the AudioUnit wants
1270  * us to provide some more audio data.
1271  * Don't print anything during normal playback, calling blocking function from
1272  * this callback is not allowed.
1273  *****************************************************************************/
1274 static OSStatus RenderCallbackAnalog( vlc_object_t *_p_aout,
1275                                       AudioUnitRenderActionFlags *ioActionFlags,
1276                                       const AudioTimeStamp *inTimeStamp,
1277                                       unsigned int inBusNumber,
1278                                       unsigned int inNumberFrames,
1279                                       AudioBufferList *ioData )
1280 {
1281     AudioTimeStamp  host_time;
1282     mtime_t         current_date = 0;
1283     uint32_t        i_mData_bytes = 0;
1284
1285     aout_instance_t * p_aout = (aout_instance_t *)_p_aout;
1286     struct aout_sys_t * p_sys = p_aout->output.p_sys;
1287
1288     VLC_UNUSED(ioActionFlags);
1289     VLC_UNUSED(inBusNumber);
1290     VLC_UNUSED(inNumberFrames);
1291
1292     host_time.mFlags = kAudioTimeStampHostTimeValid;
1293     AudioDeviceTranslateTime( p_sys->i_selected_dev, inTimeStamp, &host_time );
1294
1295     /* Check for the difference between the Device clock and mdate */
1296     p_sys->clock_diff = - (mtime_t)
1297         AudioConvertHostTimeToNanos( AudioGetCurrentHostTime() ) / 1000;
1298     p_sys->clock_diff += mdate();
1299
1300     current_date = p_sys->clock_diff +
1301                    AudioConvertHostTimeToNanos( host_time.mHostTime ) / 1000;
1302                    //- ((mtime_t) 1000000 / p_aout->output.output.i_rate * 31 ); // 31 = Latency in Frames. retrieve somewhere
1303
1304     if( ioData == NULL && ioData->mNumberBuffers < 1 )
1305     {
1306         msg_Err( p_aout, "no iodata or buffers");
1307         return 0;
1308     }
1309     if( ioData->mNumberBuffers > 1 )
1310         msg_Err( p_aout, "well this is weird. seems like there is more than one buffer..." );
1311
1312
1313     if( p_sys->i_total_bytes > 0 )
1314     {
1315         i_mData_bytes = __MIN( p_sys->i_total_bytes - p_sys->i_read_bytes, ioData->mBuffers[0].mDataByteSize );
1316         vlc_memcpy( ioData->mBuffers[0].mData,
1317                     &p_sys->p_remainder_buffer[p_sys->i_read_bytes],
1318                     i_mData_bytes );
1319         p_sys->i_read_bytes += i_mData_bytes;
1320         current_date += (mtime_t) ( (mtime_t) 1000000 / p_aout->output.output.i_rate ) *
1321                         ( i_mData_bytes / 4 / aout_FormatNbChannels( &p_aout->output.output )  ); // 4 is fl32 specific
1322
1323         if( p_sys->i_read_bytes >= p_sys->i_total_bytes )
1324             p_sys->i_read_bytes = p_sys->i_total_bytes = 0;
1325     }
1326
1327     while( i_mData_bytes < ioData->mBuffers[0].mDataByteSize )
1328     {
1329         /* We don't have enough data yet */
1330         aout_buffer_t * p_buffer;
1331         p_buffer = aout_OutputNextBuffer( p_aout, current_date , false );
1332
1333         if( p_buffer != NULL )
1334         {
1335             uint32_t i_second_mData_bytes = __MIN( p_buffer->i_buffer, ioData->mBuffers[0].mDataByteSize - i_mData_bytes );
1336
1337             vlc_memcpy( (uint8_t *)ioData->mBuffers[0].mData + i_mData_bytes,
1338                         p_buffer->p_buffer, i_second_mData_bytes );
1339             i_mData_bytes += i_second_mData_bytes;
1340
1341             if( i_mData_bytes >= ioData->mBuffers[0].mDataByteSize )
1342             {
1343                 p_sys->i_total_bytes = p_buffer->i_buffer - i_second_mData_bytes;
1344                 vlc_memcpy( p_sys->p_remainder_buffer,
1345                             &p_buffer->p_buffer[i_second_mData_bytes],
1346                             p_sys->i_total_bytes );
1347                 aout_BufferFree( p_buffer );
1348                 break;
1349             }
1350             else
1351             {
1352                 /* update current_date */
1353                 current_date += (mtime_t) ( (mtime_t) 1000000 / p_aout->output.output.i_rate ) *
1354                                 ( i_second_mData_bytes / 4 / aout_FormatNbChannels( &p_aout->output.output )  ); // 4 is fl32 specific
1355             }
1356             aout_BufferFree( p_buffer );
1357         }
1358         else
1359         {
1360              vlc_memset( (uint8_t *)ioData->mBuffers[0].mData +i_mData_bytes,
1361                          0,ioData->mBuffers[0].mDataByteSize - i_mData_bytes );
1362              i_mData_bytes += ioData->mBuffers[0].mDataByteSize - i_mData_bytes;
1363         }
1364     }
1365     return( noErr );
1366 }
1367
1368 /*****************************************************************************
1369  * RenderCallbackSPDIF: callback for SPDIF audio output
1370  *****************************************************************************/
1371 static OSStatus RenderCallbackSPDIF( AudioDeviceID inDevice,
1372                                     const AudioTimeStamp * inNow,
1373                                     const void * inInputData,
1374                                     const AudioTimeStamp * inInputTime,
1375                                     AudioBufferList * outOutputData,
1376                                     const AudioTimeStamp * inOutputTime,
1377                                     void * threadGlobals )
1378 {
1379     aout_buffer_t * p_buffer;
1380     mtime_t         current_date;
1381
1382     aout_instance_t * p_aout = (aout_instance_t *)threadGlobals;
1383     struct aout_sys_t * p_sys = p_aout->output.p_sys;
1384
1385     VLC_UNUSED(inDevice);
1386     VLC_UNUSED(inInputData);
1387     VLC_UNUSED(inInputTime);
1388
1389     /* Check for the difference between the Device clock and mdate */
1390     p_sys->clock_diff = - (mtime_t)
1391         AudioConvertHostTimeToNanos( inNow->mHostTime ) / 1000;
1392     p_sys->clock_diff += mdate();
1393
1394     current_date = p_sys->clock_diff +
1395                    AudioConvertHostTimeToNanos( inOutputTime->mHostTime ) / 1000;
1396                    //- ((mtime_t) 1000000 / p_aout->output.output.i_rate * 31 ); // 31 = Latency in Frames. retrieve somewhere
1397
1398     p_buffer = aout_OutputNextBuffer( p_aout, current_date, true );
1399
1400 #define BUFFER outOutputData->mBuffers[p_sys->i_stream_index]
1401     if( p_buffer != NULL )
1402     {
1403         if( (int)BUFFER.mDataByteSize != (int)p_buffer->i_buffer)
1404             msg_Warn( p_aout, "bytesize: %d nb_bytes: %d", (int)BUFFER.mDataByteSize, (int)p_buffer->i_buffer );
1405
1406         /* move data into output data buffer */
1407         vlc_memcpy( BUFFER.mData, p_buffer->p_buffer, p_buffer->i_buffer );
1408         aout_BufferFree( p_buffer );
1409     }
1410     else
1411     {
1412         vlc_memset( BUFFER.mData, 0, BUFFER.mDataByteSize );
1413     }
1414 #undef BUFFER
1415
1416     return( noErr );
1417 }
1418
1419 /*****************************************************************************
1420  * HardwareListener: Warns us of changes in the list of registered devices
1421  *****************************************************************************/
1422 static OSStatus HardwareListener( AudioHardwarePropertyID inPropertyID,
1423                                   void * inClientData )
1424 {
1425     OSStatus err = noErr;
1426     aout_instance_t     *p_aout = (aout_instance_t *)inClientData;
1427
1428     switch( inPropertyID )
1429     {
1430         case kAudioHardwarePropertyDevices:
1431         {
1432             /* something changed in the list of devices */
1433             /* We trigger the audio-device's aout_ChannelsRestart callback */
1434             var_TriggerCallback( p_aout, "audio-device" );
1435             var_Destroy( p_aout, "audio-device" );
1436         }
1437         break;
1438     }
1439
1440     return( err );
1441 }
1442
1443 /*****************************************************************************
1444  * StreamListener
1445  *****************************************************************************/
1446 static OSStatus StreamListener( AudioStreamID inStream,
1447                                 UInt32 inChannel,
1448                                 AudioDevicePropertyID inPropertyID,
1449                                 void * inClientData )
1450 {
1451     OSStatus err = noErr;
1452     struct { vlc_mutex_t lock; vlc_cond_t cond; } * w = inClientData;
1453
1454     VLC_UNUSED(inStream);
1455     VLC_UNUSED(inChannel);
1456
1457     switch( inPropertyID )
1458     {
1459         case kAudioStreamPropertyPhysicalFormat:
1460             vlc_mutex_lock( &w->lock );
1461             vlc_cond_signal( &w->cond );
1462             vlc_mutex_unlock( &w->lock );
1463             break;
1464
1465         default:
1466             break;
1467     }
1468     return( err );
1469 }
1470
1471 /*****************************************************************************
1472  * AudioDeviceCallback: Callback triggered when the audio-device variable is changed
1473  *****************************************************************************/
1474 static int AudioDeviceCallback( vlc_object_t *p_this, const char *psz_variable,
1475                      vlc_value_t old_val, vlc_value_t new_val, void *param )
1476 {
1477     aout_instance_t *p_aout = (aout_instance_t *)p_this;
1478     var_Set( p_aout->p_libvlc, "macosx-audio-device", new_val );
1479     msg_Dbg( p_aout, "Set Device: %#"PRIx64, new_val.i_int );
1480     return aout_ChannelsRestart( p_this, psz_variable, old_val, new_val, param );
1481 }
1482