git.sesse.net Git - vlc/blob - modules/audio_output/auhal.c

   1 /*****************************************************************************
   2  * auhal.c: AUHAL and Coreaudio output plugin
   3  *****************************************************************************
   4  * Copyright (C) 2005 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Derk-Jan Hartman <hartman at videolan dot org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27 #include <string.h>
  28 #include <unistd.h>
  29
  30 #include <vlc/vlc.h>
  31 #include <vlc_interface.h>
  32 #include <vlc_aout.h>
  33
  34 #include <CoreAudio/CoreAudio.h>
  35 #include <AudioUnit/AudioUnitProperties.h>
  36 #include <AudioUnit/AudioUnitParameters.h>
  37 #include <AudioUnit/AudioOutputUnit.h>
  38 #include <AudioToolbox/AudioFormat.h>
  39
  40 #define STREAM_FORMAT_MSG( pre, sfm ) \
  41     pre "[%ld][%4.4s][%ld][%ld][%ld][%ld][%ld][%ld]", \
  42     (UInt32)sfm.mSampleRate, (char *)&sfm.mFormatID, \
  43     sfm.mFormatFlags, sfm.mBytesPerPacket, \
  44     sfm.mFramesPerPacket, sfm.mBytesPerFrame, \
  45     sfm.mChannelsPerFrame, sfm.mBitsPerChannel
  46
  47 #define STREAM_FORMAT_MSG_FULL( pre, sfm ) \
  48     pre ":\nsamplerate: [%ld]\nFormatID: [%4.4s]\nFormatFlags: [%ld]\nBypesPerPacket: [%ld]\nFramesPerPacket: [%ld]\nBytesPerFrame: [%ld]\nChannelsPerFrame: [%ld]\nBitsPerChannel[%ld]", \
  49     (UInt32)sfm.mSampleRate, (char *)&sfm.mFormatID, \
  50     sfm.mFormatFlags, sfm.mBytesPerPacket, \
  51     sfm.mFramesPerPacket, sfm.mBytesPerFrame, \
  52     sfm.mChannelsPerFrame, sfm.mBitsPerChannel
  53
  54 #define BUFSIZE 0xffffff
  55 #define AOUT_VAR_SPDIF_FLAG 0xf00000
  56
  57 /*
  58  * TODO:
  59  * - clean up the debug info
  60  * - clean up C99'isms
  61  * - be better at changing stream setup or devices setup changes while playing.
  62  * - fix 6.1 and 7.1
  63  */
  64
  65 /*****************************************************************************
  66  * aout_sys_t: private audio output method descriptor
  67  *****************************************************************************
  68  * This structure is part of the audio output thread descriptor.
  69  * It describes the CoreAudio specific properties of an output thread.
  70  *****************************************************************************/
  71 struct aout_sys_t
  72 {
  73     AudioDeviceID               i_default_dev;  /* Keeps DeviceID of defaultOutputDevice */
  74     AudioDeviceID               i_selected_dev; /* Keeps DeviceID of the selected device */
  75     UInt32                      i_devices;      /* Number of CoreAudio Devices */
  76     vlc_bool_t                  b_supports_digital;/* Does the currently selected device support digital mode? */
  77     vlc_bool_t                  b_digital;      /* Are we running in digital mode? */
  78     mtime_t                     clock_diff;     /* Difference between VLC clock and Device clock */
  79
  80     /* AUHAL specific */
  81     Component                   au_component;   /* The Audiocomponent we use */
  82     AudioUnit                   au_unit;        /* The AudioUnit we use */
  83     uint8_t                     p_remainder_buffer[BUFSIZE];
  84     uint32_t                    i_read_bytes;
  85     uint32_t                    i_total_bytes;
  86
  87     /* CoreAudio SPDIF mode specific */
  88     pid_t                       i_hog_pid;      /* The keep the pid of our hog status */
  89     AudioStreamID               i_stream_id;    /* The StreamID that has a cac3 streamformat */
  90     int                         i_stream_index; /* The index of i_stream_id in an AudioBufferList */
  91     AudioStreamBasicDescription stream_format;  /* The format we changed the stream to */
  92     AudioStreamBasicDescription sfmt_revert;    /* The original format of the stream */
  93     vlc_bool_t                  b_revert;       /* Wether we need to revert the stream format */
  94     vlc_bool_t                  b_changed_mixing;/* Wether we need to set the mixing mode back */
  95 };
  96
  97 /*****************************************************************************
  98  * Local prototypes.
  99  *****************************************************************************/
 100 static int      Open                    ( vlc_object_t * );
 101 static int      OpenAnalog              ( aout_instance_t * );
 102 static int      OpenSPDIF               ( aout_instance_t * );
 103 static void     Close                   ( vlc_object_t * );
 104
 105 static void     Play                    ( aout_instance_t * );
 106 static void     Probe                   ( aout_instance_t * );
 107
 108 static int      AudioDeviceHasOutput    ( AudioDeviceID );
 109 static int      AudioDeviceSupportsDigital( aout_instance_t *, AudioDeviceID );
 110 static int      AudioStreamSupportsDigital( aout_instance_t *, AudioStreamID );
 111 static int      AudioStreamChangeFormat ( aout_instance_t *, AudioStreamID, AudioStreamBasicDescription );
 112
 113 static OSStatus RenderCallbackAnalog    ( vlc_object_t *, AudioUnitRenderActionFlags *, const AudioTimeStamp *,
 114                                           unsigned int, unsigned int, AudioBufferList *);
 115 static OSStatus RenderCallbackSPDIF     ( AudioDeviceID, const AudioTimeStamp *, const void *, const AudioTimeStamp *,
 116                                           AudioBufferList *, const AudioTimeStamp *, void * );
 117 static OSStatus HardwareListener        ( AudioHardwarePropertyID, void *);
 118 static OSStatus StreamListener          ( AudioStreamID, UInt32,
 119                                           AudioDevicePropertyID, void * );
 120 static int      AudioDeviceCallback     ( vlc_object_t *, const char *,
 121                                           vlc_value_t, vlc_value_t, void * );
 122
 123
 124 /*****************************************************************************
 125  * Module descriptor
 126  *****************************************************************************/
 127 #define ADEV_TEXT N_("Audio Device")
 128 #define ADEV_LONGTEXT N_("Choose a number corresponding to the number of an " \
 129     "audio device, as listed in your 'Audio Device' menu. This device will " \
 130     "then be used by default for audio playback.")
 131
 132 vlc_module_begin();
 133     set_shortname( "auhal" );
 134     set_description( _("HAL AudioUnit output") );
 135     set_capability( "audio output", 101 );
 136     set_category( CAT_AUDIO );
 137     set_subcategory( SUBCAT_AUDIO_AOUT );
 138     set_callbacks( Open, Close );
 139     add_integer( "macosx-audio-device", 0, NULL, ADEV_TEXT, ADEV_LONGTEXT, VLC_FALSE );
 140 vlc_module_end();
 141
 142 /*****************************************************************************
 143  * Open: open macosx audio output
 144  *****************************************************************************/
 145 static int Open( vlc_object_t * p_this )
 146 {
 147     OSStatus                err = noErr;
 148     UInt32                  i_param_size = 0;
 149     struct aout_sys_t       *p_sys = NULL;
 150     vlc_bool_t              b_alive = VLC_FALSE;
 151     vlc_value_t             val;
 152     aout_instance_t         *p_aout = (aout_instance_t *)p_this;
 153
 154     /* Allocate structure */
 155     p_aout->output.p_sys = malloc( sizeof( aout_sys_t ) );
 156     if( p_aout->output.p_sys == NULL )
 157     {
 158         msg_Err( p_aout, "out of memory" );
 159         return( VLC_ENOMEM );
 160     }
 161
 162     p_sys = p_aout->output.p_sys;
 163     p_sys->i_default_dev = 0;
 164     p_sys->i_selected_dev = 0;
 165     p_sys->i_devices = 0;
 166     p_sys->b_supports_digital = VLC_FALSE;
 167     p_sys->b_digital = VLC_FALSE;
 168     p_sys->au_component = NULL;
 169     p_sys->au_unit = NULL;
 170     p_sys->clock_diff = (mtime_t) 0;
 171     p_sys->i_read_bytes = 0;
 172     p_sys->i_total_bytes = 0;
 173     p_sys->i_hog_pid = -1;
 174     p_sys->i_stream_id = 0;
 175     p_sys->i_stream_index = -1;
 176     p_sys->b_revert = VLC_FALSE;
 177     p_sys->b_changed_mixing = VLC_FALSE;
 178     memset( p_sys->p_remainder_buffer, 0, sizeof(uint8_t) * BUFSIZE );
 179
 180     p_aout->output.pf_play = Play;
 181
 182     aout_FormatPrint( p_aout, "VLC is looking for:", (audio_sample_format_t *)&p_aout->output.output );
 183
 184     /* Persistent device variable */
 185     if( var_Type( p_aout->p_libvlc, "macosx-audio-device" ) == 0 )
 186     {
 187         var_Create( p_aout->p_libvlc, "macosx-audio-device", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 188     }
 189
 190     /* Build a list of devices */
 191     if( var_Type( p_aout, "audio-device" ) == 0 )
 192     {
 193         Probe( p_aout );
 194     }
 195
 196     /* What device do we want? */
 197     if( var_Get( p_aout, "audio-device", &val ) < 0 )
 198     {
 199         msg_Err( p_aout, "audio-device var does not exist. device probe failed." );
 200         goto error;
 201     }
 202
 203     p_sys->i_selected_dev = val.i_int & ~AOUT_VAR_SPDIF_FLAG; /* remove SPDIF flag to get the true DeviceID */
 204     p_sys->b_supports_digital = ( val.i_int & AOUT_VAR_SPDIF_FLAG ) ? VLC_TRUE : VLC_FALSE;
 205
 206     /* Check if the desired device is alive and usable */
 207     /* TODO: add a callback to the device to alert us if the device dies */
 208     i_param_size = sizeof( b_alive );
 209     err = AudioDeviceGetProperty( p_sys->i_selected_dev, 0, FALSE,
 210                                   kAudioDevicePropertyDeviceIsAlive,
 211                                   &i_param_size, &b_alive );
 212
 213     if( err != noErr )
 214     {
 215         msg_Err( p_aout, "could not check whether device is alive: %4.4s", (char *)&err );
 216         goto error;
 217     }
 218
 219     if( b_alive == VLC_FALSE )
 220     {
 221         msg_Warn( p_aout, "selected audio device is not alive, switching to default device" );
 222         p_sys->i_selected_dev = p_sys->i_default_dev;
 223     }
 224
 225     i_param_size = sizeof( p_sys->i_hog_pid );
 226     err = AudioDeviceGetProperty( p_sys->i_selected_dev, 0, FALSE,
 227                                   kAudioDevicePropertyHogMode,
 228                                   &i_param_size, &p_sys->i_hog_pid );
 229
 230     if( err != noErr )
 231     {
 232         /* This is not a fatal error. Some drivers simply don't support this property */
 233         msg_Warn( p_aout, "could not check whether device is hogged: %4.4s",
 234                  (char *)&err );
 235         p_sys->i_hog_pid = -1;
 236     }
 237
 238     if( p_sys->i_hog_pid != -1 && p_sys->i_hog_pid != getpid() )
 239     {
 240         msg_Err( p_aout, "Selected audio device is exclusively in use by another program." );
 241         intf_UserFatal( p_aout, VLC_FALSE, _("Audio output failed"),
 242                         _("The selected audio output device is exclusively in "
 243                           "use by another program.") );
 244         goto error;
 245     }
 246
 247     /* Check for Digital mode or Analog output mode */
 248     if( AOUT_FMT_NON_LINEAR( &p_aout->output.output ) && p_sys->b_supports_digital )
 249     {
 250         if( OpenSPDIF( p_aout ) )
 251             return VLC_SUCCESS;
 252     }
 253     else
 254     {
 255         if( OpenAnalog( p_aout ) )
 256             return VLC_SUCCESS;
 257     }
 258
 259 error:
 260     /* If we reach this, this aout has failed */
 261     var_Destroy( p_aout, "audio-device" );
 262     if( p_sys ) free( p_sys );
 263     return VLC_EGENERIC;
 264 }
 265
 266 /*****************************************************************************
 267  * Open: open and setup a HAL AudioUnit to do analog (multichannel) audio output
 268  *****************************************************************************/
 269 static int OpenAnalog( aout_instance_t *p_aout )
 270 {
 271     struct aout_sys_t           *p_sys = p_aout->output.p_sys;
 272     OSStatus                    err = noErr;
 273     UInt32                      i_param_size = 0, i = 0;
 274     int                         i_original;
 275     ComponentDescription        desc;
 276     AudioStreamBasicDescription DeviceFormat;
 277     AudioChannelLayout          *layout;
 278     AudioChannelLayout          new_layout;
 279     AURenderCallbackStruct      input;
 280
 281     /* Lets go find our Component */
 282     desc.componentType = kAudioUnitType_Output;
 283     desc.componentSubType = kAudioUnitSubType_HALOutput;
 284     desc.componentManufacturer = kAudioUnitManufacturer_Apple;
 285     desc.componentFlags = 0;
 286     desc.componentFlagsMask = 0;
 287
 288     p_sys->au_component = FindNextComponent( NULL, &desc );
 289     if( p_sys->au_component == NULL )
 290     {
 291         msg_Warn( p_aout, "we cannot find our HAL component" );
 292         return VLC_FALSE;
 293     }
 294
 295     err = OpenAComponent( p_sys->au_component, &p_sys->au_unit );
 296     if( err != noErr )
 297     {
 298         msg_Warn( p_aout, "we cannot open our HAL component" );
 299         return VLC_FALSE;
 300     }
 301
 302     /* Set the device we will use for this output unit */
 303     err = AudioUnitSetProperty( p_sys->au_unit,
 304                          kAudioOutputUnitProperty_CurrentDevice,
 305                          kAudioUnitScope_Global,
 306                          0,
 307                          &p_sys->i_selected_dev,
 308                          sizeof( AudioDeviceID ));
 309
 310     if( err != noErr )
 311     {
 312         msg_Warn( p_aout, "we cannot select the audio device" );
 313         return VLC_FALSE;
 314     }
 315
 316     /* Get the current format */
 317     i_param_size = sizeof(AudioStreamBasicDescription);
 318
 319     err = AudioUnitGetProperty( p_sys->au_unit,
 320                                    kAudioUnitProperty_StreamFormat,
 321                                    kAudioUnitScope_Input,
 322                                    0,
 323                                    &DeviceFormat,
 324                                    &i_param_size );
 325
 326     if( err != noErr ) return VLC_FALSE;
 327     else msg_Dbg( p_aout, STREAM_FORMAT_MSG( "current format is: ", DeviceFormat ) );
 328
 329     /* Get the channel layout of the device side of the unit (vlc -> unit -> device) */
 330     err = AudioUnitGetPropertyInfo( p_sys->au_unit,
 331                                    kAudioDevicePropertyPreferredChannelLayout,
 332                                    kAudioUnitScope_Output,
 333                                    0,
 334                                    &i_param_size,
 335                                    NULL );
 336
 337     if( err == noErr )
 338     {
 339         layout = (AudioChannelLayout *)malloc( i_param_size);
 340
 341         verify_noerr( AudioUnitGetProperty( p_sys->au_unit,
 342                                        kAudioDevicePropertyPreferredChannelLayout,
 343                                        kAudioUnitScope_Output,
 344                                        0,
 345                                        layout,
 346                                        &i_param_size ));
 347
 348         /* We need to "fill out" the ChannelLayout, because there are multiple ways that it can be set */
 349         if( layout->mChannelLayoutTag == kAudioChannelLayoutTag_UseChannelBitmap)
 350         {
 351             /* bitmap defined channellayout */
 352             verify_noerr( AudioFormatGetProperty( kAudioFormatProperty_ChannelLayoutForBitmap,
 353                                     sizeof( UInt32), &layout->mChannelBitmap,
 354                                     &i_param_size,
 355                                     layout ));
 356         }
 357         else if( layout->mChannelLayoutTag != kAudioChannelLayoutTag_UseChannelDescriptions )
 358         {
 359             /* layouttags defined channellayout */
 360             verify_noerr( AudioFormatGetProperty( kAudioFormatProperty_ChannelLayoutForTag,
 361                                     sizeof( AudioChannelLayoutTag ), &layout->mChannelLayoutTag,
 362                                     &i_param_size,
 363                                     layout ));
 364         }
 365
 366         msg_Dbg( p_aout, "layout of AUHAL has %d channels" , (int)layout->mNumberChannelDescriptions );
 367
 368         /* Initialize the VLC core channel count */
 369         p_aout->output.output.i_physical_channels = 0;
 370         i_original = p_aout->output.output.i_original_channels & AOUT_CHAN_PHYSMASK;
 371
 372         if( i_original == AOUT_CHAN_CENTER || layout->mNumberChannelDescriptions < 2 )
 373         {
 374             /* We only need Mono or cannot output more than 1 channel */
 375             p_aout->output.output.i_physical_channels = AOUT_CHAN_CENTER;
 376         }
 377         else if( i_original == (AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT) || layout->mNumberChannelDescriptions < 3 )
 378         {
 379             /* We only need Stereo or cannot output more than 2 channels */
 380             p_aout->output.output.i_physical_channels = AOUT_CHAN_RIGHT | AOUT_CHAN_LEFT;
 381         }
 382         else
 383         {
 384             /* We want more than stereo and we can do that */
 385             for( i = 0; i < layout->mNumberChannelDescriptions; i++ )
 386             {
 387                 msg_Dbg( p_aout, "this is channel: %d", (int)layout->mChannelDescriptions[i].mChannelLabel );
 388
 389                 switch( layout->mChannelDescriptions[i].mChannelLabel )
 390                 {
 391                     case kAudioChannelLabel_Left:
 392                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_LEFT;
 393                         continue;
 394                     case kAudioChannelLabel_Right:
 395                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_RIGHT;
 396                         continue;
 397                     case kAudioChannelLabel_Center:
 398                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_CENTER;
 399                         continue;
 400                     case kAudioChannelLabel_LFEScreen:
 401                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_LFE;
 402                         continue;
 403                     case kAudioChannelLabel_LeftSurround:
 404                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_REARLEFT;
 405                         continue;
 406                     case kAudioChannelLabel_RightSurround:
 407                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_REARRIGHT;
 408                         continue;
 409                     case kAudioChannelLabel_RearSurroundLeft:
 410                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_MIDDLELEFT;
 411                         continue;
 412                     case kAudioChannelLabel_RearSurroundRight:
 413                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_MIDDLERIGHT;
 414                         continue;
 415                     case kAudioChannelLabel_CenterSurround:
 416                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_REARCENTER;
 417                         continue;
 418                     default:
 419                         msg_Warn( p_aout, "unrecognized channel form provided by driver: %d", (int)layout->mChannelDescriptions[i].mChannelLabel );
 420                 }
 421             }
 422             if( p_aout->output.output.i_physical_channels == 0 )
 423             {
 424                 p_aout->output.output.i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
 425                 msg_Err( p_aout, "You should configure your speaker layout with Audio Midi Setup Utility in /Applications/Utilities. Now using Stereo mode." );
 426                 intf_UserFatal( p_aout, VLC_FALSE, _("Audio device is not configured"),
 427                                 _("You should configure your speaker layout with "
 428                                   "the \"Audio Midi Setup Utility\" in /Applications/"
 429                                   "Utilities. Stereo mode is being used now.") );
 430             }
 431         }
 432         if( layout ) free( layout );
 433     }
 434     else
 435     {
 436         msg_Warn( p_aout, "this driver does not support kAudioDevicePropertyPreferredChannelLayout. BAD DRIVER AUTHOR !!!" );
 437         p_aout->output.output.i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
 438     }
 439
 440     msg_Dbg( p_aout, "selected %d physical channels for device output", aout_FormatNbChannels( &p_aout->output.output ) );
 441     msg_Dbg( p_aout, "VLC will output: %s", aout_FormatPrintChannels( &p_aout->output.output ));
 442
 443     memset (&new_layout, 0, sizeof(new_layout));
 444     switch( aout_FormatNbChannels( &p_aout->output.output ) )
 445     {
 446         case 1:
 447             new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_Mono;
 448             break;
 449         case 2:
 450             new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_Stereo;
 451             break;
 452         case 3:
 453             if( p_aout->output.output.i_physical_channels & AOUT_CHAN_CENTER )
 454             {
 455                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_7; // L R C
 456             }
 457             else if( p_aout->output.output.i_physical_channels & AOUT_CHAN_LFE )
 458             {
 459                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_4; // L R LFE
 460             }
 461             break;
 462         case 4:
 463             if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_CENTER | AOUT_CHAN_LFE ) )
 464             {
 465                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_10; // L R C LFE
 466             }
 467             else if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT ) )
 468             {
 469                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_3; // L R Ls Rs
 470             }
 471             else if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_CENTER | AOUT_CHAN_REARCENTER ) )
 472             {
 473                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_3; // L R C Cs
 474             }
 475             break;
 476         case 5:
 477             if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_CENTER ) )
 478             {
 479                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_19; // L R Ls Rs C
 480             }
 481             else if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_LFE ) )
 482             {
 483                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_18; // L R Ls Rs LFE
 484             }
 485             break;
 486         case 6:
 487             if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_LFE ) )
 488             {
 489                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_20; // L R Ls Rs C LFE
 490             }
 491             else
 492             {
 493                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_AudioUnit_6_0; // L R Ls Rs C Cs
 494             }
 495             break;
 496         case 7:
 497             /* FIXME: This is incorrect. VLC uses the internal ordering: L R Lm Rm Lr Rr C LFE but this is wrong */
 498             new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_MPEG_6_1_A; // L R C LFE Ls Rs Cs
 499             break;
 500         case 8:
 501             /* FIXME: This is incorrect. VLC uses the internal ordering: L R Lm Rm Lr Rr C LFE but this is wrong */
 502             new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_MPEG_7_1_A; // L R C LFE Ls Rs Lc Rc
 503             break;
 504     }
 505
 506     /* Set up the format to be used */
 507     DeviceFormat.mSampleRate = p_aout->output.output.i_rate;
 508     DeviceFormat.mFormatID = kAudioFormatLinearPCM;
 509
 510     /* We use float 32. It's the best supported format by both VLC and Coreaudio */
 511     p_aout->output.output.i_format = VLC_FOURCC( 'f','l','3','2');
 512     DeviceFormat.mFormatFlags = kAudioFormatFlagsNativeFloatPacked;
 513     DeviceFormat.mBitsPerChannel = 32;
 514     DeviceFormat.mChannelsPerFrame = aout_FormatNbChannels( &p_aout->output.output );
 515
 516     /* Calculate framesizes and stuff */
 517     DeviceFormat.mFramesPerPacket = 1;
 518     DeviceFormat.mBytesPerFrame = DeviceFormat.mBitsPerChannel * DeviceFormat.mChannelsPerFrame / 8;
 519     DeviceFormat.mBytesPerPacket = DeviceFormat.mBytesPerFrame * DeviceFormat.mFramesPerPacket;
 520
 521     /* Set the desired format */
 522     i_param_size = sizeof(AudioStreamBasicDescription);
 523     verify_noerr( AudioUnitSetProperty( p_sys->au_unit,
 524                                    kAudioUnitProperty_StreamFormat,
 525                                    kAudioUnitScope_Input,
 526                                    0,
 527                                    &DeviceFormat,
 528                                    i_param_size ));
 529
 530     msg_Dbg( p_aout, STREAM_FORMAT_MSG( "we set the AU format: " , DeviceFormat ) );
 531
 532     /* Retrieve actual format */
 533     verify_noerr( AudioUnitGetProperty( p_sys->au_unit,
 534                                    kAudioUnitProperty_StreamFormat,
 535                                    kAudioUnitScope_Input,
 536                                    0,
 537                                    &DeviceFormat,
 538                                    &i_param_size ));
 539
 540     msg_Dbg( p_aout, STREAM_FORMAT_MSG( "the actual set AU format is " , DeviceFormat ) );
 541
 542     /* Do the last VLC aout setups */
 543     aout_FormatPrepare( &p_aout->output.output );
 544     p_aout->output.i_nb_samples = 2048;
 545     aout_VolumeSoftInit( p_aout );
 546
 547     /* set the IOproc callback */
 548     input.inputProc = (AURenderCallback) RenderCallbackAnalog;
 549     input.inputProcRefCon = p_aout;
 550
 551     verify_noerr( AudioUnitSetProperty( p_sys->au_unit,
 552                             kAudioUnitProperty_SetRenderCallback,
 553                             kAudioUnitScope_Input,
 554                             0, &input, sizeof( input ) ) );
 555
 556     input.inputProc = (AURenderCallback) RenderCallbackAnalog;
 557     input.inputProcRefCon = p_aout;
 558
 559     /* Set the new_layout as the layout VLC will use to feed the AU unit */
 560     verify_noerr( AudioUnitSetProperty( p_sys->au_unit,
 561                             kAudioUnitProperty_AudioChannelLayout,
 562                             kAudioUnitScope_Input,
 563                             0, &new_layout, sizeof(new_layout) ) );
 564
 565     if( new_layout.mNumberChannelDescriptions > 0 )
 566         free( new_layout.mChannelDescriptions );
 567
 568     /* AU initiliaze */
 569     verify_noerr( AudioUnitInitialize(p_sys->au_unit) );
 570
 571     /* Find the difference between device clock and mdate clock */
 572     p_sys->clock_diff = - (mtime_t)
 573         AudioConvertHostTimeToNanos( AudioGetCurrentHostTime() ) / 1000;
 574     p_sys->clock_diff += mdate();
 575
 576     /* Start the AU */
 577     verify_noerr( AudioOutputUnitStart(p_sys->au_unit) );
 578
 579     return VLC_TRUE;
 580 }
 581
 582 /*****************************************************************************
 583  * Setup a encoded digital stream (SPDIF)
 584  *****************************************************************************/
 585 static int OpenSPDIF( aout_instance_t * p_aout )
 586 {
 587     struct aout_sys_t       *p_sys = p_aout->output.p_sys;
 588     OSStatus                err = noErr;
 589     UInt32                  i_param_size = 0, b_mix = 0;
 590     Boolean                 b_writeable = VLC_FALSE;
 591     AudioStreamID           *p_streams = NULL;
 592     int                     i = 0, i_streams = 0;
 593
 594     /* Start doing the SPDIF setup proces */
 595     p_sys->b_digital = VLC_TRUE;
 596
 597     /* Hog the device */
 598     i_param_size = sizeof( p_sys->i_hog_pid );
 599     p_sys->i_hog_pid = getpid() ;
 600
 601     err = AudioDeviceSetProperty( p_sys->i_selected_dev, 0, 0, FALSE,
 602                                   kAudioDevicePropertyHogMode, i_param_size, &p_sys->i_hog_pid );
 603
 604     if( err != noErr )
 605     {
 606         msg_Err( p_aout, "failed to set hogmode: [%4.4s]", (char *)&err );
 607         return VLC_FALSE;
 608     }
 609
 610     /* Set mixable to false if we are allowed to */
 611     err = AudioDeviceGetPropertyInfo( p_sys->i_selected_dev, 0, FALSE, kAudioDevicePropertySupportsMixing,
 612                                     &i_param_size, &b_writeable );
 613
 614     err = AudioDeviceGetProperty( p_sys->i_selected_dev, 0, FALSE, kAudioDevicePropertySupportsMixing,
 615                                     &i_param_size, &b_mix );
 616
 617     if( !err && b_writeable )
 618     {
 619         b_mix = 0;
 620         err = AudioDeviceSetProperty( p_sys->i_selected_dev, 0, 0, FALSE,
 621                             kAudioDevicePropertySupportsMixing, i_param_size, &b_mix );
 622         p_sys->b_changed_mixing = VLC_TRUE;
 623     }
 624
 625     if( err != noErr )
 626     {
 627         msg_Err( p_aout, "failed to set mixmode: [%4.4s]", (char *)&err );
 628         return VLC_FALSE;
 629     }
 630
 631     /* Get a list of all the streams on this device */
 632     err = AudioDeviceGetPropertyInfo( p_sys->i_selected_dev, 0, FALSE,
 633                                       kAudioDevicePropertyStreams,
 634                                       &i_param_size, NULL );
 635     if( err != noErr )
 636     {
 637         msg_Err( p_aout, "could not get number of streams: [%4.4s]", (char *)&err );
 638         return VLC_FALSE;
 639     }
 640
 641     i_streams = i_param_size / sizeof( AudioStreamID );
 642     p_streams = (AudioStreamID *)malloc( i_param_size );
 643     if( p_streams == NULL )
 644     {
 645         msg_Err( p_aout, "out of memory" );
 646         return VLC_FALSE;
 647     }
 648
 649     err = AudioDeviceGetProperty( p_sys->i_selected_dev, 0, FALSE,
 650                                     kAudioDevicePropertyStreams,
 651                                     &i_param_size, p_streams );
 652
 653     if( err != noErr )
 654     {
 655         msg_Err( p_aout, "could not get number of streams: [%4.4s]", (char *)&err );
 656         if( p_streams ) free( p_streams );
 657         return VLC_FALSE;
 658     }
 659
 660     for( i = 0; i < i_streams && p_sys->i_stream_index < 0 ; i++ )
 661     {
 662         /* Find a stream with a cac3 stream */
 663         AudioStreamBasicDescription *p_format_list = NULL;
 664         int                         i_formats = 0, j = 0;
 665         vlc_bool_t                  b_digital = VLC_FALSE;
 666
 667         /* Retrieve all the stream formats supported by each output stream */
 668         err = AudioStreamGetPropertyInfo( p_streams[i], 0,
 669                                           kAudioStreamPropertyPhysicalFormats,
 670                                           &i_param_size, NULL );
 671         if( err != noErr )
 672         {
 673             msg_Err( p_aout, "could not get number of streamformats: [%4.4s]", (char *)&err );
 674             continue;
 675         }
 676
 677         i_formats = i_param_size / sizeof( AudioStreamBasicDescription );
 678         p_format_list = (AudioStreamBasicDescription *)malloc( i_param_size );
 679         if( p_format_list == NULL )
 680         {
 681             msg_Err( p_aout, "could not malloc the memory" );
 682             continue;
 683         }
 684
 685         err = AudioStreamGetProperty( p_streams[i], 0,
 686                                           kAudioStreamPropertyPhysicalFormats,
 687                                           &i_param_size, p_format_list );
 688         if( err != noErr )
 689         {
 690             msg_Err( p_aout, "could not get the list of streamformats: [%4.4s]", (char *)&err );
 691             if( p_format_list) free( p_format_list);
 692             continue;
 693         }
 694
 695         /* Check if one of the supported formats is a digital format */
 696         for( j = 0; j < i_formats; j++ )
 697         {
 698             if( p_format_list[j].mFormatID == 'IAC3' ||
 699                   p_format_list[j].mFormatID == kAudioFormat60958AC3 )
 700             {
 701                 b_digital = VLC_TRUE;
 702                 break;
 703             }
 704         }
 705
 706         if( b_digital )
 707         {
 708             /* if this stream supports a digital (cac3) format, then go set it. */
 709             int i_requested_rate_format = -1;
 710             int i_current_rate_format = -1;
 711             int i_backup_rate_format = -1;
 712
 713             p_sys->i_stream_id = p_streams[i];
 714             p_sys->i_stream_index = i;
 715
 716             if( p_sys->b_revert == VLC_FALSE )
 717             {
 718                 /* Retrieve the original format of this stream first if not done so already */
 719                 i_param_size = sizeof( p_sys->sfmt_revert );
 720                 err = AudioStreamGetProperty( p_sys->i_stream_id, 0,
 721                                               kAudioStreamPropertyPhysicalFormat,
 722                                               &i_param_size,
 723                                               &p_sys->sfmt_revert );
 724                 if( err != noErr )
 725                 {
 726                     msg_Err( p_aout, "could not retrieve the original streamformat: [%4.4s]", (char *)&err );
 727                     continue;
 728                 }
 729                 p_sys->b_revert = VLC_TRUE;
 730             }
 731
 732             for( j = 0; j < i_formats; j++ )
 733             {
 734                 if( p_format_list[j].mFormatID == 'IAC3' ||
 735                       p_format_list[j].mFormatID == kAudioFormat60958AC3 )
 736                 {
 737                     if( p_format_list[j].mSampleRate == p_aout->output.output.i_rate )
 738                     {
 739                         i_requested_rate_format = j;
 740                         break;
 741                     }
 742                     else if( p_format_list[j].mSampleRate == p_sys->sfmt_revert.mSampleRate )
 743                     {
 744                         i_current_rate_format = j;
 745                     }
 746                     else
 747                     {
 748                         if( i_backup_rate_format < 0 || p_format_list[j].mSampleRate > p_format_list[i_backup_rate_format].mSampleRate )
 749                             i_backup_rate_format = j;
 750                     }
 751                 }
 752
 753             }
 754
 755             if( i_requested_rate_format >= 0 ) /* We prefer to output at the samplerate of the original audio */
 756                 p_sys->stream_format = p_format_list[i_requested_rate_format];
 757             else if( i_current_rate_format >= 0 ) /* If not possible, we will try to use the current samplerate of the device */
 758                 p_sys->stream_format = p_format_list[i_current_rate_format];
 759             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) */
 760         }
 761         if( p_format_list ) free( p_format_list );
 762     }
 763     if( p_streams ) free( p_streams );
 764
 765     msg_Dbg( p_aout, STREAM_FORMAT_MSG( "original stream format: ", p_sys->sfmt_revert ) );
 766
 767     if( !AudioStreamChangeFormat( p_aout, p_sys->i_stream_id, p_sys->stream_format ) )
 768         return VLC_FALSE;
 769
 770     /* Set the format flags */
 771     if( p_sys->stream_format.mFormatFlags & kAudioFormatFlagIsBigEndian )
 772         p_aout->output.output.i_format = VLC_FOURCC('s','p','d','b');
 773     else
 774         p_aout->output.output.i_format = VLC_FOURCC('s','p','d','i');
 775     p_aout->output.output.i_bytes_per_frame = AOUT_SPDIF_SIZE;
 776     p_aout->output.output.i_frame_length = A52_FRAME_NB;
 777     p_aout->output.i_nb_samples = p_aout->output.output.i_frame_length;
 778     p_aout->output.output.i_rate = (unsigned int)p_sys->stream_format.mSampleRate;
 779     aout_FormatPrepare( &p_aout->output.output );
 780     aout_VolumeNoneInit( p_aout );
 781
 782     /* Add IOProc callback */
 783     err = AudioDeviceAddIOProc( p_sys->i_selected_dev,
 784                                 (AudioDeviceIOProc)RenderCallbackSPDIF,
 785                                 (void *)p_aout );
 786     if( err != noErr )
 787     {
 788         msg_Err( p_aout, "AudioDeviceAddIOProc failed: [%4.4s]", (char *)&err );
 789         return VLC_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 VLC_FALSE;
 810     }
 811
 812     return VLC_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     if( p_sys ) 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     {
 946         msg_Err( p_aout, "out of memory" );
 947         goto error;
 948     }
 949
 950     /* Populate DeviceID array */
 951     err = AudioHardwareGetProperty( kAudioHardwarePropertyDevices,
 952                                     &i_param_size, p_devices );
 953     if( err != noErr )
 954     {
 955         msg_Err( p_aout, "could not get the device IDs: [%4.4s]", (char *)&err );
 956         goto error;
 957     }
 958
 959     /* Find the ID of the default Device */
 960     i_param_size = sizeof( AudioDeviceID );
 961     err = AudioHardwareGetProperty( kAudioHardwarePropertyDefaultOutputDevice,
 962                                     &i_param_size, &devid_def );
 963     if( err != noErr )
 964     {
 965         msg_Err( p_aout, "could not get default audio device: [%4.4s]", (char *)&err );
 966         goto error;
 967     }
 968     p_sys->i_default_dev = devid_def;
 969
 970     var_Create( p_aout, "audio-device", VLC_VAR_INTEGER|VLC_VAR_HASCHOICE );
 971     text.psz_string = _("Audio Device");
 972     var_Change( p_aout, "audio-device", VLC_VAR_SETTEXT, &text, NULL );
 973
 974     for( i = 0; i < p_sys->i_devices; i++ )
 975     {
 976         char *psz_name;
 977         i_param_size = 0;
 978
 979         /* Retrieve the length of the device name */
 980         err = AudioDeviceGetPropertyInfo(
 981                     p_devices[i], 0, VLC_FALSE,
 982                     kAudioDevicePropertyDeviceName,
 983                     &i_param_size, NULL);
 984         if( err ) goto error;
 985
 986         /* Retrieve the name of the device */
 987         psz_name = (char *)malloc( i_param_size );
 988         err = AudioDeviceGetProperty(
 989                     p_devices[i], 0, VLC_FALSE,
 990                     kAudioDevicePropertyDeviceName,
 991                     &i_param_size, psz_name);
 992         if( err ) goto error;
 993
 994         msg_Dbg( p_aout, "DevID: %#lx DevName: %s", p_devices[i], psz_name );
 995
 996         if( !AudioDeviceHasOutput( p_devices[i]) )
 997         {
 998             msg_Dbg( p_aout, "this device is INPUT only. skipping..." );
 999             continue;
1000         }
1001
1002         /* Add the menu entries */
1003         val.i_int = (int)p_devices[i];
1004         text.psz_string = strdup( psz_name );
1005         var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
1006         if( p_sys->i_default_dev == p_devices[i] )
1007         {
1008             /* The default device is the selected device normally */
1009             var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
1010             var_Set( p_aout, "audio-device", val );
1011         }
1012
1013         if( AudioDeviceSupportsDigital( p_aout, p_devices[i] ) )
1014         {
1015             val.i_int = (int)p_devices[i] | AOUT_VAR_SPDIF_FLAG;
1016             asprintf( &text.psz_string, _("%s (Encoded Output)"), psz_name );
1017             var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
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         free( psz_name);
1028     }
1029
1030     /* If a device is already "preselected", then use this device */
1031     var_Get( p_aout->p_libvlc, "macosx-audio-device", &val );
1032     if( val.i_int > 0 )
1033     {
1034         var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
1035         var_Set( p_aout, "audio-device", val );
1036     }
1037
1038     /* If we change the device we want to use, we should renegotiate the audio chain */
1039     var_AddCallback( p_aout, "audio-device", AudioDeviceCallback, NULL );
1040
1041     /* Attach a Listener so that we are notified of a change in the Device setup */
1042     err = AudioHardwareAddPropertyListener( kAudioHardwarePropertyDevices,
1043                                             HardwareListener,
1044                                             (void *)p_aout );
1045     if( err )
1046         goto error;
1047
1048     if( p_devices ) free( p_devices );
1049     return;
1050
1051 error:
1052     var_Destroy( p_aout, "audio-device" );
1053     if( p_devices ) free( p_devices );
1054     return;
1055 }
1056
1057 /*****************************************************************************
1058  * AudioDeviceHasOutput: Checks if the Device actually provides any outputs at all
1059  *****************************************************************************/
1060 static int AudioDeviceHasOutput( AudioDeviceID i_dev_id )
1061 {
1062     UInt32                      dataSize;
1063     Boolean                     isWritable;
1064
1065     verify_noerr( AudioDeviceGetPropertyInfo( i_dev_id, 0, FALSE, kAudioDevicePropertyStreams, &dataSize, &isWritable) );
1066     if (dataSize == 0) return FALSE;
1067
1068     return TRUE;
1069 }
1070
1071 /*****************************************************************************
1072  * AudioDeviceSupportsDigital: Check i_dev_id for digital stream support.
1073  *****************************************************************************/
1074 static int AudioDeviceSupportsDigital( aout_instance_t *p_aout, AudioDeviceID i_dev_id )
1075 {
1076     OSStatus                    err = noErr;
1077     UInt32                      i_param_size = 0;
1078     AudioStreamID               *p_streams = NULL;
1079     int                         i = 0, i_streams = 0;
1080     vlc_bool_t                  b_return = VLC_FALSE;
1081
1082     /* Retrieve all the output streams */
1083     err = AudioDeviceGetPropertyInfo( i_dev_id, 0, FALSE,
1084                                       kAudioDevicePropertyStreams,
1085                                       &i_param_size, NULL );
1086     if( err != noErr )
1087     {
1088         msg_Err( p_aout, "could not get number of streams: [%4.4s]", (char *)&err );
1089         return VLC_FALSE;
1090     }
1091
1092     i_streams = i_param_size / sizeof( AudioStreamID );
1093     p_streams = (AudioStreamID *)malloc( i_param_size );
1094     if( p_streams == NULL )
1095     {
1096         msg_Err( p_aout, "out of memory" );
1097         return VLC_ENOMEM;
1098     }
1099
1100     err = AudioDeviceGetProperty( i_dev_id, 0, FALSE,
1101                                     kAudioDevicePropertyStreams,
1102                                     &i_param_size, p_streams );
1103
1104     if( err != noErr )
1105     {
1106         msg_Err( p_aout, "could not get number of streams: [%4.4s]", (char *)&err );
1107         return VLC_FALSE;
1108     }
1109
1110     for( i = 0; i < i_streams; i++ )
1111     {
1112         if( AudioStreamSupportsDigital( p_aout, p_streams[i] ) )
1113             b_return = VLC_TRUE;
1114     }
1115
1116     if( p_streams ) free( p_streams );
1117     return b_return;
1118 }
1119
1120 /*****************************************************************************
1121  * AudioStreamSupportsDigital: Check i_stream_id for digital stream support.
1122  *****************************************************************************/
1123 static int AudioStreamSupportsDigital( aout_instance_t *p_aout, AudioStreamID i_stream_id )
1124 {
1125     OSStatus                    err = noErr;
1126     UInt32                      i_param_size = 0;
1127     AudioStreamBasicDescription *p_format_list = NULL;
1128     int                         i = 0, i_formats = 0;
1129     vlc_bool_t                  b_return = VLC_FALSE;
1130
1131     /* Retrieve all the stream formats supported by each output stream */
1132     err = AudioStreamGetPropertyInfo( i_stream_id, 0,
1133                                       kAudioStreamPropertyPhysicalFormats,
1134                                       &i_param_size, NULL );
1135     if( err != noErr )
1136     {
1137         msg_Err( p_aout, "could not get number of streamformats: [%4.4s]", (char *)&err );
1138         return VLC_FALSE;
1139     }
1140
1141     i_formats = i_param_size / sizeof( AudioStreamBasicDescription );
1142     p_format_list = (AudioStreamBasicDescription *)malloc( i_param_size );
1143     if( p_format_list == NULL )
1144     {
1145         msg_Err( p_aout, "could not malloc the memory" );
1146         return VLC_FALSE;
1147     }
1148
1149     err = AudioStreamGetProperty( i_stream_id, 0,
1150                                       kAudioStreamPropertyPhysicalFormats,
1151                                       &i_param_size, p_format_list );
1152     if( err != noErr )
1153     {
1154         msg_Err( p_aout, "could not get the list of streamformats: [%4.4s]", (char *)&err );
1155         free( p_format_list);
1156         p_format_list = NULL;
1157         return VLC_FALSE;
1158     }
1159
1160     for( i = 0; i < i_formats; i++ )
1161     {
1162         msg_Dbg( p_aout, STREAM_FORMAT_MSG( "supported format: ", p_format_list[i] ) );
1163
1164         if( p_format_list[i].mFormatID == 'IAC3' ||
1165                   p_format_list[i].mFormatID == kAudioFormat60958AC3 )
1166         {
1167             b_return = VLC_TRUE;
1168         }
1169     }
1170
1171     if( p_format_list ) free( p_format_list );
1172     return b_return;
1173 }
1174
1175 /*****************************************************************************
1176  * AudioStreamChangeFormat: Change i_stream_id to change_format
1177  *****************************************************************************/
1178 static int AudioStreamChangeFormat( aout_instance_t *p_aout, AudioStreamID i_stream_id, AudioStreamBasicDescription change_format )
1179 {
1180     OSStatus            err = noErr;
1181     UInt32              i_param_size = 0;
1182     int i;
1183
1184     struct timeval now;
1185     struct timespec timeout;
1186     struct { vlc_mutex_t lock; vlc_cond_t cond; } w;
1187
1188     msg_Dbg( p_aout, STREAM_FORMAT_MSG( "setting stream format: ", change_format ) );
1189
1190     /* Condition because SetProperty is asynchronious */
1191     vlc_cond_init( p_aout, &w.cond );
1192     vlc_mutex_init( p_aout, &w.lock );
1193     vlc_mutex_lock( &w.lock );
1194
1195     /* Install the callback */
1196     err = AudioStreamAddPropertyListener( i_stream_id, 0,
1197                                       kAudioStreamPropertyPhysicalFormat,
1198                                       StreamListener, (void *)&w );
1199     if( err != noErr )
1200     {
1201         msg_Err( p_aout, "AudioStreamAddPropertyListener failed: [%4.4s]", (char *)&err );
1202         return VLC_FALSE;
1203     }
1204
1205     /* change the format */
1206     err = AudioStreamSetProperty( i_stream_id, 0, 0,
1207                                   kAudioStreamPropertyPhysicalFormat,
1208                                   sizeof( AudioStreamBasicDescription ),
1209                                   &change_format );
1210     if( err != noErr )
1211     {
1212         msg_Err( p_aout, "could not set the stream format: [%4.4s]", (char *)&err );
1213         return VLC_FALSE;
1214     }
1215
1216     /* The AudioStreamSetProperty is not only asynchronious (requiring the locks)
1217      * it is also not atomic in its behaviour.
1218      * Therefore we check 5 times before we really give up.
1219      * FIXME: failing isn't actually implemented yet. */
1220     for( i = 0; i < 5; i++ )
1221     {
1222         AudioStreamBasicDescription actual_format;
1223
1224         gettimeofday( &now, NULL );
1225         timeout.tv_sec = now.tv_sec;
1226         timeout.tv_nsec = (now.tv_usec + 500000) * 1000;
1227
1228         if( pthread_cond_timedwait( &w.cond.cond, &w.lock.mutex, &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 VLC_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 VLC_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 inBusNummer,
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     host_time.mFlags = kAudioTimeStampHostTimeValid;
1289     AudioDeviceTranslateTime( p_sys->i_selected_dev, inTimeStamp, &host_time );
1290
1291     /* Check for the difference between the Device clock and mdate */
1292     p_sys->clock_diff = - (mtime_t)
1293         AudioConvertHostTimeToNanos( AudioGetCurrentHostTime() ) / 1000;
1294     p_sys->clock_diff += mdate();
1295
1296     current_date = p_sys->clock_diff +
1297                    AudioConvertHostTimeToNanos( host_time.mHostTime ) / 1000;
1298                    //- ((mtime_t) 1000000 / p_aout->output.output.i_rate * 31 ); // 31 = Latency in Frames. retrieve somewhere
1299
1300     if( ioData == NULL && ioData->mNumberBuffers < 1 )
1301     {
1302         msg_Err( p_aout, "no iodata or buffers");
1303         return 0;
1304     }
1305     if( ioData->mNumberBuffers > 1 )
1306         msg_Err( p_aout, "well this is weird. seems like there is more than one buffer..." );
1307
1308
1309     if( p_sys->i_total_bytes > 0 )
1310     {
1311         i_mData_bytes = __MIN( p_sys->i_total_bytes - p_sys->i_read_bytes, ioData->mBuffers[0].mDataByteSize );
1312         p_aout->p_libvlc->pf_memcpy( ioData->mBuffers[0].mData, &p_sys->p_remainder_buffer[p_sys->i_read_bytes], i_mData_bytes );
1313         p_sys->i_read_bytes += i_mData_bytes;
1314         current_date += (mtime_t) ( (mtime_t) 1000000 / p_aout->output.output.i_rate ) *
1315                         ( i_mData_bytes / 4 / aout_FormatNbChannels( &p_aout->output.output )  ); // 4 is fl32 specific
1316
1317         if( p_sys->i_read_bytes >= p_sys->i_total_bytes )
1318             p_sys->i_read_bytes = p_sys->i_total_bytes = 0;
1319     }
1320
1321     while( i_mData_bytes < ioData->mBuffers[0].mDataByteSize )
1322     {
1323         /* We don't have enough data yet */
1324         aout_buffer_t * p_buffer;
1325         p_buffer = aout_OutputNextBuffer( p_aout, current_date , VLC_FALSE );
1326
1327         if( p_buffer != NULL )
1328         {
1329             uint32_t i_second_mData_bytes = __MIN( p_buffer->i_nb_bytes, ioData->mBuffers[0].mDataByteSize - i_mData_bytes );
1330
1331             p_aout->p_libvlc->pf_memcpy( (uint8_t *)ioData->mBuffers[0].mData + i_mData_bytes, p_buffer->p_buffer, i_second_mData_bytes );
1332             i_mData_bytes += i_second_mData_bytes;
1333
1334             if( i_mData_bytes >= ioData->mBuffers[0].mDataByteSize )
1335             {
1336                 p_sys->i_total_bytes = p_buffer->i_nb_bytes - i_second_mData_bytes;
1337                 p_aout->p_libvlc->pf_memcpy( p_sys->p_remainder_buffer, &p_buffer->p_buffer[i_second_mData_bytes], p_sys->i_total_bytes );
1338             }
1339             else
1340             {
1341                 /* update current_date */
1342                 current_date += (mtime_t) ( (mtime_t) 1000000 / p_aout->output.output.i_rate ) *
1343                                 ( i_second_mData_bytes / 4 / aout_FormatNbChannels( &p_aout->output.output )  ); // 4 is fl32 specific
1344             }
1345             aout_BufferFree( p_buffer );
1346         }
1347         else
1348         {
1349              p_aout->p_libvlc->pf_memset( (uint8_t *)ioData->mBuffers[0].mData +i_mData_bytes, 0, ioData->mBuffers[0].mDataByteSize - i_mData_bytes );
1350              i_mData_bytes += ioData->mBuffers[0].mDataByteSize - i_mData_bytes;
1351         }
1352     }
1353     return( noErr );
1354 }
1355
1356 /*****************************************************************************
1357  * RenderCallbackSPDIF: callback for SPDIF audio output
1358  *****************************************************************************/
1359 static OSStatus RenderCallbackSPDIF( AudioDeviceID inDevice,
1360                                     const AudioTimeStamp * inNow,
1361                                     const void * inInputData,
1362                                     const AudioTimeStamp * inInputTime,
1363                                     AudioBufferList * outOutputData,
1364                                     const AudioTimeStamp * inOutputTime,
1365                                     void * threadGlobals )
1366 {
1367     aout_buffer_t * p_buffer;
1368     mtime_t         current_date;
1369
1370     aout_instance_t * p_aout = (aout_instance_t *)threadGlobals;
1371     struct aout_sys_t * p_sys = p_aout->output.p_sys;
1372
1373     /* Check for the difference between the Device clock and mdate */
1374     p_sys->clock_diff = - (mtime_t)
1375         AudioConvertHostTimeToNanos( inNow->mHostTime ) / 1000;
1376     p_sys->clock_diff += mdate();
1377
1378     current_date = p_sys->clock_diff +
1379                    AudioConvertHostTimeToNanos( inOutputTime->mHostTime ) / 1000;
1380                    //- ((mtime_t) 1000000 / p_aout->output.output.i_rate * 31 ); // 31 = Latency in Frames. retrieve somewhere
1381
1382     p_buffer = aout_OutputNextBuffer( p_aout, current_date, VLC_TRUE );
1383
1384 #define BUFFER outOutputData->mBuffers[p_sys->i_stream_index]
1385     if( p_buffer != NULL )
1386     {
1387         if( (int)BUFFER.mDataByteSize != (int)p_buffer->i_nb_bytes)
1388             msg_Warn( p_aout, "bytesize: %d nb_bytes: %d", (int)BUFFER.mDataByteSize, (int)p_buffer->i_nb_bytes );
1389
1390         /* move data into output data buffer */
1391         p_aout->p_libvlc->pf_memcpy( BUFFER.mData,
1392                                   p_buffer->p_buffer, p_buffer->i_nb_bytes );
1393         aout_BufferFree( p_buffer );
1394     }
1395     else
1396     {
1397         p_aout->p_libvlc->pf_memset( BUFFER.mData, 0, BUFFER.mDataByteSize );
1398     }
1399 #undef BUFFER
1400
1401     return( noErr );
1402 }
1403
1404 /*****************************************************************************
1405  * HardwareListener: Warns us of changes in the list of registered devices
1406  *****************************************************************************/
1407 static OSStatus HardwareListener( AudioHardwarePropertyID inPropertyID,
1408                                   void * inClientData )
1409 {
1410     OSStatus err = noErr;
1411     aout_instance_t     *p_aout = (aout_instance_t *)inClientData;
1412
1413     switch( inPropertyID )
1414     {
1415         case kAudioHardwarePropertyDevices:
1416         {
1417             /* something changed in the list of devices */
1418             /* We trigger the audio-device's aout_ChannelsRestart callback */
1419             var_Change( p_aout, "audio-device", VLC_VAR_TRIGGER_CALLBACKS, NULL, NULL );
1420             var_Destroy( p_aout, "audio-device" );
1421         }
1422         break;
1423     }
1424
1425     return( err );
1426 }
1427
1428 /*****************************************************************************
1429  * StreamListener
1430  *****************************************************************************/
1431 static OSStatus StreamListener( AudioStreamID inStream,
1432                                 UInt32 inChannel,
1433                                 AudioDevicePropertyID inPropertyID,
1434                                 void * inClientData )
1435 {
1436     OSStatus err = noErr;
1437     struct { vlc_mutex_t lock; vlc_cond_t cond; } * w = inClientData;
1438
1439     switch( inPropertyID )
1440     {
1441         case kAudioStreamPropertyPhysicalFormat:
1442             vlc_mutex_lock( &w->lock );
1443             vlc_cond_signal( &w->cond );
1444             vlc_mutex_unlock( &w->lock );
1445             break;
1446
1447         default:
1448             break;
1449     }
1450     return( err );
1451 }
1452
1453 /*****************************************************************************
1454  * AudioDeviceCallback: Callback triggered when the audio-device variable is changed
1455  *****************************************************************************/
1456 static int AudioDeviceCallback( vlc_object_t *p_this, const char *psz_variable,
1457                      vlc_value_t old_val, vlc_value_t new_val, void *param )
1458 {
1459     aout_instance_t *p_aout = (aout_instance_t *)p_this;
1460     var_Set( p_aout->p_libvlc, "macosx-audio-device", new_val );
1461     msg_Dbg( p_aout, "Set Device: %#x", new_val.i_int );
1462     return aout_ChannelsRestart( p_this, psz_variable, old_val, new_val, param );
1463 }
1464