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 <unistd.h>
  28
  29 #include <vlc/vlc.h>
  30 #include <vlc_interface.h>
  31 #include <vlc_aout.h>
  32
  33 #include <CoreAudio/CoreAudio.h>
  34 #include <AudioUnit/AudioUnitProperties.h>
  35 #include <AudioUnit/AudioUnitParameters.h>
  36 #include <AudioUnit/AudioOutputUnit.h>
  37 #include <AudioToolbox/AudioFormat.h>
  38
  39 #define STREAM_FORMAT_MSG( pre, sfm ) \
  40     pre "[%ld][%4.4s][%ld][%ld][%ld][%ld][%ld][%ld]", \
  41     (UInt32)sfm.mSampleRate, (char *)&sfm.mFormatID, \
  42     sfm.mFormatFlags, sfm.mBytesPerPacket, \
  43     sfm.mFramesPerPacket, sfm.mBytesPerFrame, \
  44     sfm.mChannelsPerFrame, sfm.mBitsPerChannel
  45
  46 #define STREAM_FORMAT_MSG_FULL( pre, sfm ) \
  47     pre ":\nsamplerate: [%ld]\nFormatID: [%4.4s]\nFormatFlags: [%ld]\nBypesPerPacket: [%ld]\nFramesPerPacket: [%ld]\nBytesPerFrame: [%ld]\nChannelsPerFrame: [%ld]\nBitsPerChannel[%ld]", \
  48     (UInt32)sfm.mSampleRate, (char *)&sfm.mFormatID, \
  49     sfm.mFormatFlags, sfm.mBytesPerPacket, \
  50     sfm.mFramesPerPacket, sfm.mBytesPerFrame, \
  51     sfm.mChannelsPerFrame, sfm.mBitsPerChannel
  52
  53 #define BUFSIZE 0xffffff
  54 #define AOUT_VAR_SPDIF_FLAG 0xf00000
  55
  56 /*
  57  * TODO:
  58  * - clean up the debug info
  59  * - clean up C99'isms
  60  * - be better at changing stream setup or devices setup changes while playing.
  61  * - fix 6.1 and 7.1
  62  */
  63
  64 /*****************************************************************************
  65  * aout_sys_t: private audio output method descriptor
  66  *****************************************************************************
  67  * This structure is part of the audio output thread descriptor.
  68  * It describes the CoreAudio specific properties of an output thread.
  69  *****************************************************************************/
  70 struct aout_sys_t
  71 {
  72     AudioDeviceID               i_default_dev;  /* Keeps DeviceID of defaultOutputDevice */
  73     AudioDeviceID               i_selected_dev; /* Keeps DeviceID of the selected device */
  74     UInt32                      i_devices;      /* Number of CoreAudio Devices */
  75     vlc_bool_t                  b_supports_digital;/* Does the currently selected device support digital mode? */
  76     vlc_bool_t                  b_digital;      /* Are we running in digital mode? */
  77     mtime_t                     clock_diff;     /* Difference between VLC clock and Device clock */
  78
  79     /* AUHAL specific */
  80     Component                   au_component;   /* The Audiocomponent we use */
  81     AudioUnit                   au_unit;        /* The AudioUnit we use */
  82     uint8_t                     p_remainder_buffer[BUFSIZE];
  83     uint32_t                    i_read_bytes;
  84     uint32_t                    i_total_bytes;
  85
  86     /* CoreAudio SPDIF mode specific */
  87     pid_t                       i_hog_pid;      /* The keep the pid of our hog status */
  88     AudioStreamID               i_stream_id;    /* The StreamID that has a cac3 streamformat */
  89     int                         i_stream_index; /* The index of i_stream_id in an AudioBufferList */
  90     AudioStreamBasicDescription stream_format;  /* The format we changed the stream to */
  91     AudioStreamBasicDescription sfmt_revert;    /* The original format of the stream */
  92     vlc_bool_t                  b_revert;       /* Wether we need to revert the stream format */
  93     vlc_bool_t                  b_changed_mixing;/* Wether we need to set the mixing mode back */
  94 };
  95
  96 /*****************************************************************************
  97  * Local prototypes.
  98  *****************************************************************************/
  99 static int      Open                    ( vlc_object_t * );
 100 static int      OpenAnalog              ( aout_instance_t * );
 101 static int      OpenSPDIF               ( aout_instance_t * );
 102 static void     Close                   ( vlc_object_t * );
 103
 104 static void     Play                    ( aout_instance_t * );
 105 static void     Probe                   ( aout_instance_t * );
 106
 107 static int      AudioDeviceHasOutput    ( AudioDeviceID );
 108 static int      AudioDeviceSupportsDigital( aout_instance_t *, AudioDeviceID );
 109 static int      AudioStreamSupportsDigital( aout_instance_t *, AudioStreamID );
 110 static int      AudioStreamChangeFormat ( aout_instance_t *, AudioStreamID, AudioStreamBasicDescription );
 111
 112 static OSStatus RenderCallbackAnalog    ( vlc_object_t *, AudioUnitRenderActionFlags *, const AudioTimeStamp *,
 113                                           unsigned int, unsigned int, AudioBufferList *);
 114 static OSStatus RenderCallbackSPDIF     ( AudioDeviceID, const AudioTimeStamp *, const void *, const AudioTimeStamp *,
 115                                           AudioBufferList *, const AudioTimeStamp *, void * );
 116 static OSStatus HardwareListener        ( AudioHardwarePropertyID, void *);
 117 static OSStatus StreamListener          ( AudioStreamID, UInt32,
 118                                           AudioDevicePropertyID, void * );
 119 static int      AudioDeviceCallback     ( vlc_object_t *, const char *,
 120                                           vlc_value_t, vlc_value_t, void * );
 121
 122
 123 /*****************************************************************************
 124  * Module descriptor
 125  *****************************************************************************/
 126 #define ADEV_TEXT N_("Audio Device")
 127 #define ADEV_LONGTEXT N_("Choose a number corresponding to the number of an " \
 128     "audio device, as listed in your 'Audio Device' menu. This device will " \
 129     "then be used by default for audio playback.")
 130
 131 vlc_module_begin();
 132     set_shortname( "auhal" );
 133     set_description( _("HAL AudioUnit output") );
 134     set_capability( "audio output", 101 );
 135     set_category( CAT_AUDIO );
 136     set_subcategory( SUBCAT_AUDIO_AOUT );
 137     set_callbacks( Open, Close );
 138     add_integer( "macosx-audio-device", 0, NULL, ADEV_TEXT, ADEV_LONGTEXT, VLC_FALSE );
 139 vlc_module_end();
 140
 141 /*****************************************************************************
 142  * Open: open macosx audio output
 143  *****************************************************************************/
 144 static int Open( vlc_object_t * p_this )
 145 {
 146     OSStatus                err = noErr;
 147     UInt32                  i_param_size = 0;
 148     struct aout_sys_t       *p_sys = NULL;
 149     vlc_bool_t              b_alive = VLC_FALSE;
 150     vlc_value_t             val;
 151     aout_instance_t         *p_aout = (aout_instance_t *)p_this;
 152
 153     /* Allocate structure */
 154     p_aout->output.p_sys = malloc( sizeof( aout_sys_t ) );
 155     if( p_aout->output.p_sys == NULL )
 156     {
 157         msg_Err( p_aout, "out of memory" );
 158         return( VLC_ENOMEM );
 159     }
 160
 161     p_sys = p_aout->output.p_sys;
 162     p_sys->i_default_dev = 0;
 163     p_sys->i_selected_dev = 0;
 164     p_sys->i_devices = 0;
 165     p_sys->b_supports_digital = VLC_FALSE;
 166     p_sys->b_digital = VLC_FALSE;
 167     p_sys->au_component = NULL;
 168     p_sys->au_unit = NULL;
 169     p_sys->clock_diff = (mtime_t) 0;
 170     p_sys->i_read_bytes = 0;
 171     p_sys->i_total_bytes = 0;
 172     p_sys->i_hog_pid = -1;
 173     p_sys->i_stream_id = 0;
 174     p_sys->i_stream_index = -1;
 175     p_sys->b_revert = VLC_FALSE;
 176     p_sys->b_changed_mixing = VLC_FALSE;
 177     memset( p_sys->p_remainder_buffer, 0, sizeof(uint8_t) * BUFSIZE );
 178
 179     p_aout->output.pf_play = Play;
 180
 181     aout_FormatPrint( p_aout, "VLC is looking for:", (audio_sample_format_t *)&p_aout->output.output );
 182
 183     /* Persistent device variable */
 184     if( var_Type( p_aout->p_libvlc, "macosx-audio-device" ) == 0 )
 185     {
 186         var_Create( p_aout->p_libvlc, "macosx-audio-device", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 187     }
 188
 189     /* Build a list of devices */
 190     if( var_Type( p_aout, "audio-device" ) == 0 )
 191     {
 192         Probe( p_aout );
 193     }
 194
 195     /* What device do we want? */
 196     if( var_Get( p_aout, "audio-device", &val ) < 0 )
 197     {
 198         msg_Err( p_aout, "audio-device var does not exist. device probe failed." );
 199         goto error;
 200     }
 201
 202     p_sys->i_selected_dev = val.i_int & ~AOUT_VAR_SPDIF_FLAG; /* remove SPDIF flag to get the true DeviceID */
 203     p_sys->b_supports_digital = ( val.i_int & AOUT_VAR_SPDIF_FLAG ) ? VLC_TRUE : VLC_FALSE;
 204
 205     /* Check if the desired device is alive and usable */
 206     /* TODO: add a callback to the device to alert us if the device dies */
 207     i_param_size = sizeof( b_alive );
 208     err = AudioDeviceGetProperty( p_sys->i_selected_dev, 0, FALSE,
 209                                   kAudioDevicePropertyDeviceIsAlive,
 210                                   &i_param_size, &b_alive );
 211
 212     if( err != noErr )
 213     {
 214         msg_Err( p_aout, "could not check whether device is alive: %4.4s", (char *)&err );
 215         goto error;
 216     }
 217
 218     if( b_alive == VLC_FALSE )
 219     {
 220         msg_Warn( p_aout, "selected audio device is not alive, switching to default device" );
 221         p_sys->i_selected_dev = p_sys->i_default_dev;
 222     }
 223
 224     i_param_size = sizeof( p_sys->i_hog_pid );
 225     err = AudioDeviceGetProperty( p_sys->i_selected_dev, 0, FALSE,
 226                                   kAudioDevicePropertyHogMode,
 227                                   &i_param_size, &p_sys->i_hog_pid );
 228
 229     if( err != noErr )
 230     {
 231         /* This is not a fatal error. Some drivers simply don't support this property */
 232         msg_Warn( p_aout, "could not check whether device is hogged: %4.4s",
 233                  (char *)&err );
 234         p_sys->i_hog_pid = -1;
 235     }
 236
 237     if( p_sys->i_hog_pid != -1 && p_sys->i_hog_pid != getpid() )
 238     {
 239         msg_Err( p_aout, "Selected audio device is exclusively in use by another program." );
 240         intf_UserFatal( p_aout, VLC_FALSE, _("Audio output failed"),
 241                         _("The selected audio output device is exclusively in "
 242                           "use by another program.") );
 243         goto error;
 244     }
 245
 246     /* Check for Digital mode or Analog output mode */
 247     if( AOUT_FMT_NON_LINEAR( &p_aout->output.output ) && p_sys->b_supports_digital )
 248     {
 249         if( OpenSPDIF( p_aout ) )
 250             return VLC_SUCCESS;
 251     }
 252     else
 253     {
 254         if( OpenAnalog( p_aout ) )
 255             return VLC_SUCCESS;
 256     }
 257
 258 error:
 259     /* If we reach this, this aout has failed */
 260     var_Destroy( p_aout, "audio-device" );
 261     if( p_sys ) free( p_sys );
 262     return VLC_EGENERIC;
 263 }
 264
 265 /*****************************************************************************
 266  * Open: open and setup a HAL AudioUnit to do analog (multichannel) audio output
 267  *****************************************************************************/
 268 static int OpenAnalog( aout_instance_t *p_aout )
 269 {
 270     struct aout_sys_t           *p_sys = p_aout->output.p_sys;
 271     OSStatus                    err = noErr;
 272     UInt32                      i_param_size = 0, i = 0;
 273     int                         i_original;
 274     ComponentDescription        desc;
 275     AudioStreamBasicDescription DeviceFormat;
 276     AudioChannelLayout          *layout;
 277     AudioChannelLayout          new_layout;
 278     AURenderCallbackStruct      input;
 279
 280     /* Lets go find our Component */
 281     desc.componentType = kAudioUnitType_Output;
 282     desc.componentSubType = kAudioUnitSubType_HALOutput;
 283     desc.componentManufacturer = kAudioUnitManufacturer_Apple;
 284     desc.componentFlags = 0;
 285     desc.componentFlagsMask = 0;
 286
 287     p_sys->au_component = FindNextComponent( NULL, &desc );
 288     if( p_sys->au_component == NULL )
 289     {
 290         msg_Warn( p_aout, "we cannot find our HAL component" );
 291         return VLC_FALSE;
 292     }
 293
 294     err = OpenAComponent( p_sys->au_component, &p_sys->au_unit );
 295     if( err != noErr )
 296     {
 297         msg_Warn( p_aout, "we cannot open our HAL component" );
 298         return VLC_FALSE;
 299     }
 300
 301     /* Set the device we will use for this output unit */
 302     err = AudioUnitSetProperty( p_sys->au_unit,
 303                          kAudioOutputUnitProperty_CurrentDevice,
 304                          kAudioUnitScope_Global,
 305                          0,
 306                          &p_sys->i_selected_dev,
 307                          sizeof( AudioDeviceID ));
 308
 309     if( err != noErr )
 310     {
 311         msg_Warn( p_aout, "we cannot select the audio device" );
 312         return VLC_FALSE;
 313     }
 314
 315     /* Get the current format */
 316     i_param_size = sizeof(AudioStreamBasicDescription);
 317
 318     err = AudioUnitGetProperty( p_sys->au_unit,
 319                                    kAudioUnitProperty_StreamFormat,
 320                                    kAudioUnitScope_Input,
 321                                    0,
 322                                    &DeviceFormat,
 323                                    &i_param_size );
 324
 325     if( err != noErr ) return VLC_FALSE;
 326     else msg_Dbg( p_aout, STREAM_FORMAT_MSG( "current format is: ", DeviceFormat ) );
 327
 328     /* Get the channel layout of the device side of the unit (vlc -> unit -> device) */
 329     err = AudioUnitGetPropertyInfo( p_sys->au_unit,
 330                                    kAudioDevicePropertyPreferredChannelLayout,
 331                                    kAudioUnitScope_Output,
 332                                    0,
 333                                    &i_param_size,
 334                                    NULL );
 335
 336     if( err == noErr )
 337     {
 338         layout = (AudioChannelLayout *)malloc( i_param_size);
 339
 340         verify_noerr( AudioUnitGetProperty( p_sys->au_unit,
 341                                        kAudioDevicePropertyPreferredChannelLayout,
 342                                        kAudioUnitScope_Output,
 343                                        0,
 344                                        layout,
 345                                        &i_param_size ));
 346
 347         /* We need to "fill out" the ChannelLayout, because there are multiple ways that it can be set */
 348         if( layout->mChannelLayoutTag == kAudioChannelLayoutTag_UseChannelBitmap)
 349         {
 350             /* bitmap defined channellayout */
 351             verify_noerr( AudioFormatGetProperty( kAudioFormatProperty_ChannelLayoutForBitmap,
 352                                     sizeof( UInt32), &layout->mChannelBitmap,
 353                                     &i_param_size,
 354                                     layout ));
 355         }
 356         else if( layout->mChannelLayoutTag != kAudioChannelLayoutTag_UseChannelDescriptions )
 357         {
 358             /* layouttags defined channellayout */
 359             verify_noerr( AudioFormatGetProperty( kAudioFormatProperty_ChannelLayoutForTag,
 360                                     sizeof( AudioChannelLayoutTag ), &layout->mChannelLayoutTag,
 361                                     &i_param_size,
 362                                     layout ));
 363         }
 364
 365         msg_Dbg( p_aout, "layout of AUHAL has %d channels" , (int)layout->mNumberChannelDescriptions );
 366
 367         /* Initialize the VLC core channel count */
 368         p_aout->output.output.i_physical_channels = 0;
 369         i_original = p_aout->output.output.i_original_channels & AOUT_CHAN_PHYSMASK;
 370
 371         if( i_original == AOUT_CHAN_CENTER || layout->mNumberChannelDescriptions < 2 )
 372         {
 373             /* We only need Mono or cannot output more than 1 channel */
 374             p_aout->output.output.i_physical_channels = AOUT_CHAN_CENTER;
 375         }
 376         else if( i_original == (AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT) || layout->mNumberChannelDescriptions < 3 )
 377         {
 378             /* We only need Stereo or cannot output more than 2 channels */
 379             p_aout->output.output.i_physical_channels = AOUT_CHAN_RIGHT | AOUT_CHAN_LEFT;
 380         }
 381         else
 382         {
 383             /* We want more than stereo and we can do that */
 384             for( i = 0; i < layout->mNumberChannelDescriptions; i++ )
 385             {
 386                 msg_Dbg( p_aout, "this is channel: %d", (int)layout->mChannelDescriptions[i].mChannelLabel );
 387
 388                 switch( layout->mChannelDescriptions[i].mChannelLabel )
 389                 {
 390                     case kAudioChannelLabel_Left:
 391                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_LEFT;
 392                         continue;
 393                     case kAudioChannelLabel_Right:
 394                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_RIGHT;
 395                         continue;
 396                     case kAudioChannelLabel_Center:
 397                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_CENTER;
 398                         continue;
 399                     case kAudioChannelLabel_LFEScreen:
 400                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_LFE;
 401                         continue;
 402                     case kAudioChannelLabel_LeftSurround:
 403                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_REARLEFT;
 404                         continue;
 405                     case kAudioChannelLabel_RightSurround:
 406                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_REARRIGHT;
 407                         continue;
 408                     case kAudioChannelLabel_RearSurroundLeft:
 409                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_MIDDLELEFT;
 410                         continue;
 411                     case kAudioChannelLabel_RearSurroundRight:
 412                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_MIDDLERIGHT;
 413                         continue;
 414                     case kAudioChannelLabel_CenterSurround:
 415                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_REARCENTER;
 416                         continue;
 417                     default:
 418                         msg_Warn( p_aout, "unrecognized channel form provided by driver: %d", (int)layout->mChannelDescriptions[i].mChannelLabel );
 419                 }
 420             }
 421             if( p_aout->output.output.i_physical_channels == 0 )
 422             {
 423                 p_aout->output.output.i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
 424                 msg_Err( p_aout, "You should configure your speaker layout with Audio Midi Setup Utility in /Applications/Utilities. Now using Stereo mode." );
 425                 intf_UserFatal( p_aout, VLC_FALSE, _("Audio device is not configured"),
 426                                 _("You should configure your speaker layout with "
 427                                   "the \"Audio Midi Setup Utility\" in /Applications/"
 428                                   "Utilities. Stereo mode is being used now.") );
 429             }
 430         }
 431         if( layout ) free( layout );
 432     }
 433     else
 434     {
 435         msg_Warn( p_aout, "this driver does not support kAudioDevicePropertyPreferredChannelLayout. BAD DRIVER AUTHOR !!!" );
 436         p_aout->output.output.i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
 437     }
 438
 439     msg_Dbg( p_aout, "selected %d physical channels for device output", aout_FormatNbChannels( &p_aout->output.output ) );
 440     msg_Dbg( p_aout, "VLC will output: %s", aout_FormatPrintChannels( &p_aout->output.output ));
 441
 442     memset (&new_layout, 0, sizeof(new_layout));
 443     switch( aout_FormatNbChannels( &p_aout->output.output ) )
 444     {
 445         case 1:
 446             new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_Mono;
 447             break;
 448         case 2:
 449             new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_Stereo;
 450             break;
 451         case 3:
 452             if( p_aout->output.output.i_physical_channels & AOUT_CHAN_CENTER )
 453             {
 454                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_7; // L R C
 455             }
 456             else if( p_aout->output.output.i_physical_channels & AOUT_CHAN_LFE )
 457             {
 458                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_4; // L R LFE
 459             }
 460             break;
 461         case 4:
 462             if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_CENTER | AOUT_CHAN_LFE ) )
 463             {
 464                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_10; // L R C LFE
 465             }
 466             else if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT ) )
 467             {
 468                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_3; // L R Ls Rs
 469             }
 470             else if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_CENTER | AOUT_CHAN_REARCENTER ) )
 471             {
 472                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_3; // L R C Cs
 473             }
 474             break;
 475         case 5:
 476             if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_CENTER ) )
 477             {
 478                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_19; // L R Ls Rs C
 479             }
 480             else if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_LFE ) )
 481             {
 482                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_18; // L R Ls Rs LFE
 483             }
 484             break;
 485         case 6:
 486             if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_LFE ) )
 487             {
 488                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_20; // L R Ls Rs C LFE
 489             }
 490             else
 491             {
 492                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_AudioUnit_6_0; // L R Ls Rs C Cs
 493             }
 494             break;
 495         case 7:
 496             /* FIXME: This is incorrect. VLC uses the internal ordering: L R Lm Rm Lr Rr C LFE but this is wrong */
 497             new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_MPEG_6_1_A; // L R C LFE Ls Rs Cs
 498             break;
 499         case 8:
 500             /* FIXME: This is incorrect. VLC uses the internal ordering: L R Lm Rm Lr Rr C LFE but this is wrong */
 501             new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_MPEG_7_1_A; // L R C LFE Ls Rs Lc Rc
 502             break;
 503     }
 504
 505     /* Set up the format to be used */
 506     DeviceFormat.mSampleRate = p_aout->output.output.i_rate;
 507     DeviceFormat.mFormatID = kAudioFormatLinearPCM;
 508
 509     /* We use float 32. It's the best supported format by both VLC and Coreaudio */
 510     p_aout->output.output.i_format = VLC_FOURCC( 'f','l','3','2');
 511     DeviceFormat.mFormatFlags = kAudioFormatFlagsNativeFloatPacked;
 512     DeviceFormat.mBitsPerChannel = 32;
 513     DeviceFormat.mChannelsPerFrame = aout_FormatNbChannels( &p_aout->output.output );
 514
 515     /* Calculate framesizes and stuff */
 516     DeviceFormat.mFramesPerPacket = 1;
 517     DeviceFormat.mBytesPerFrame = DeviceFormat.mBitsPerChannel * DeviceFormat.mChannelsPerFrame / 8;
 518     DeviceFormat.mBytesPerPacket = DeviceFormat.mBytesPerFrame * DeviceFormat.mFramesPerPacket;
 519
 520     /* Set the desired format */
 521     i_param_size = sizeof(AudioStreamBasicDescription);
 522     verify_noerr( AudioUnitSetProperty( p_sys->au_unit,
 523                                    kAudioUnitProperty_StreamFormat,
 524                                    kAudioUnitScope_Input,
 525                                    0,
 526                                    &DeviceFormat,
 527                                    i_param_size ));
 528
 529     msg_Dbg( p_aout, STREAM_FORMAT_MSG( "we set the AU format: " , DeviceFormat ) );
 530
 531     /* Retrieve actual format */
 532     verify_noerr( AudioUnitGetProperty( p_sys->au_unit,
 533                                    kAudioUnitProperty_StreamFormat,
 534                                    kAudioUnitScope_Input,
 535                                    0,
 536                                    &DeviceFormat,
 537                                    &i_param_size ));
 538
 539     msg_Dbg( p_aout, STREAM_FORMAT_MSG( "the actual set AU format is " , DeviceFormat ) );
 540
 541     /* Do the last VLC aout setups */
 542     aout_FormatPrepare( &p_aout->output.output );
 543     p_aout->output.i_nb_samples = 2048;
 544     aout_VolumeSoftInit( p_aout );
 545
 546     /* set the IOproc callback */
 547     input.inputProc = (AURenderCallback) RenderCallbackAnalog;
 548     input.inputProcRefCon = p_aout;
 549
 550     verify_noerr( AudioUnitSetProperty( p_sys->au_unit,
 551                             kAudioUnitProperty_SetRenderCallback,
 552                             kAudioUnitScope_Input,
 553                             0, &input, sizeof( input ) ) );
 554
 555     input.inputProc = (AURenderCallback) RenderCallbackAnalog;
 556     input.inputProcRefCon = p_aout;
 557
 558     /* Set the new_layout as the layout VLC will use to feed the AU unit */
 559     verify_noerr( AudioUnitSetProperty( p_sys->au_unit,
 560                             kAudioUnitProperty_AudioChannelLayout,
 561                             kAudioUnitScope_Input,
 562                             0, &new_layout, sizeof(new_layout) ) );
 563
 564     if( new_layout.mNumberChannelDescriptions > 0 )
 565         free( new_layout.mChannelDescriptions );
 566
 567     /* AU initiliaze */
 568     verify_noerr( AudioUnitInitialize(p_sys->au_unit) );
 569
 570     /* Find the difference between device clock and mdate clock */
 571     p_sys->clock_diff = - (mtime_t)
 572         AudioConvertHostTimeToNanos( AudioGetCurrentHostTime() ) / 1000;
 573     p_sys->clock_diff += mdate();
 574
 575     /* Start the AU */
 576     verify_noerr( AudioOutputUnitStart(p_sys->au_unit) );
 577
 578     return VLC_TRUE;
 579 }
 580
 581 /*****************************************************************************
 582  * Setup a encoded digital stream (SPDIF)
 583  *****************************************************************************/
 584 static int OpenSPDIF( aout_instance_t * p_aout )
 585 {
 586     struct aout_sys_t       *p_sys = p_aout->output.p_sys;
 587     OSStatus                err = noErr;
 588     UInt32                  i_param_size = 0, b_mix = 0;
 589     Boolean                 b_writeable = VLC_FALSE;
 590     AudioStreamID           *p_streams = NULL;
 591     int                     i = 0, i_streams = 0;
 592
 593     /* Start doing the SPDIF setup proces */
 594     p_sys->b_digital = VLC_TRUE;
 595
 596     /* Hog the device */
 597     i_param_size = sizeof( p_sys->i_hog_pid );
 598     p_sys->i_hog_pid = getpid() ;
 599
 600     err = AudioDeviceSetProperty( p_sys->i_selected_dev, 0, 0, FALSE,
 601                                   kAudioDevicePropertyHogMode, i_param_size, &p_sys->i_hog_pid );
 602
 603     if( err != noErr )
 604     {
 605         msg_Err( p_aout, "failed to set hogmode: [%4.4s]", (char *)&err );
 606         return VLC_FALSE;
 607     }
 608
 609     /* Set mixable to false if we are allowed to */
 610     err = AudioDeviceGetPropertyInfo( p_sys->i_selected_dev, 0, FALSE, kAudioDevicePropertySupportsMixing,
 611                                     &i_param_size, &b_writeable );
 612
 613     err = AudioDeviceGetProperty( p_sys->i_selected_dev, 0, FALSE, kAudioDevicePropertySupportsMixing,
 614                                     &i_param_size, &b_mix );
 615
 616     if( !err && b_writeable )
 617     {
 618         b_mix = 0;
 619         err = AudioDeviceSetProperty( p_sys->i_selected_dev, 0, 0, FALSE,
 620                             kAudioDevicePropertySupportsMixing, i_param_size, &b_mix );
 621         p_sys->b_changed_mixing = VLC_TRUE;
 622     }
 623
 624     if( err != noErr )
 625     {
 626         msg_Err( p_aout, "failed to set mixmode: [%4.4s]", (char *)&err );
 627         return VLC_FALSE;
 628     }
 629
 630     /* Get a list of all the streams on this device */
 631     err = AudioDeviceGetPropertyInfo( p_sys->i_selected_dev, 0, FALSE,
 632                                       kAudioDevicePropertyStreams,
 633                                       &i_param_size, NULL );
 634     if( err != noErr )
 635     {
 636         msg_Err( p_aout, "could not get number of streams: [%4.4s]", (char *)&err );
 637         return VLC_FALSE;
 638     }
 639
 640     i_streams = i_param_size / sizeof( AudioStreamID );
 641     p_streams = (AudioStreamID *)malloc( i_param_size );
 642     if( p_streams == NULL )
 643     {
 644         msg_Err( p_aout, "out of memory" );
 645         return VLC_FALSE;
 646     }
 647
 648     err = AudioDeviceGetProperty( p_sys->i_selected_dev, 0, FALSE,
 649                                     kAudioDevicePropertyStreams,
 650                                     &i_param_size, p_streams );
 651
 652     if( err != noErr )
 653     {
 654         msg_Err( p_aout, "could not get number of streams: [%4.4s]", (char *)&err );
 655         if( p_streams ) free( p_streams );
 656         return VLC_FALSE;
 657     }
 658
 659     for( i = 0; i < i_streams && p_sys->i_stream_index < 0 ; i++ )
 660     {
 661         /* Find a stream with a cac3 stream */
 662         AudioStreamBasicDescription *p_format_list = NULL;
 663         int                         i_formats = 0, j = 0;
 664         vlc_bool_t                  b_digital = VLC_FALSE;
 665
 666         /* Retrieve all the stream formats supported by each output stream */
 667         err = AudioStreamGetPropertyInfo( p_streams[i], 0,
 668                                           kAudioStreamPropertyPhysicalFormats,
 669                                           &i_param_size, NULL );
 670         if( err != noErr )
 671         {
 672             msg_Err( p_aout, "could not get number of streamformats: [%4.4s]", (char *)&err );
 673             continue;
 674         }
 675
 676         i_formats = i_param_size / sizeof( AudioStreamBasicDescription );
 677         p_format_list = (AudioStreamBasicDescription *)malloc( i_param_size );
 678         if( p_format_list == NULL )
 679         {
 680             msg_Err( p_aout, "could not malloc the memory" );
 681             continue;
 682         }
 683
 684         err = AudioStreamGetProperty( p_streams[i], 0,
 685                                           kAudioStreamPropertyPhysicalFormats,
 686                                           &i_param_size, p_format_list );
 687         if( err != noErr )
 688         {
 689             msg_Err( p_aout, "could not get the list of streamformats: [%4.4s]", (char *)&err );
 690             if( p_format_list) free( p_format_list);
 691             continue;
 692         }
 693
 694         /* Check if one of the supported formats is a digital format */
 695         for( j = 0; j < i_formats; j++ )
 696         {
 697             if( p_format_list[j].mFormatID == 'IAC3' ||
 698                   p_format_list[j].mFormatID == kAudioFormat60958AC3 )
 699             {
 700                 b_digital = VLC_TRUE;
 701                 break;
 702             }
 703         }
 704
 705         if( b_digital )
 706         {
 707             /* if this stream supports a digital (cac3) format, then go set it. */
 708             int i_requested_rate_format = -1;
 709             int i_current_rate_format = -1;
 710             int i_backup_rate_format = -1;
 711
 712             p_sys->i_stream_id = p_streams[i];
 713             p_sys->i_stream_index = i;
 714
 715             if( p_sys->b_revert == VLC_FALSE )
 716             {
 717                 /* Retrieve the original format of this stream first if not done so already */
 718                 i_param_size = sizeof( p_sys->sfmt_revert );
 719                 err = AudioStreamGetProperty( p_sys->i_stream_id, 0,
 720                                               kAudioStreamPropertyPhysicalFormat,
 721                                               &i_param_size,
 722                                               &p_sys->sfmt_revert );
 723                 if( err != noErr )
 724                 {
 725                     msg_Err( p_aout, "could not retrieve the original streamformat: [%4.4s]", (char *)&err );
 726                     continue;
 727                 }
 728                 p_sys->b_revert = VLC_TRUE;
 729             }
 730
 731             for( j = 0; j < i_formats; j++ )
 732             {
 733                 if( p_format_list[j].mFormatID == 'IAC3' ||
 734                       p_format_list[j].mFormatID == kAudioFormat60958AC3 )
 735                 {
 736                     if( p_format_list[j].mSampleRate == p_aout->output.output.i_rate )
 737                     {
 738                         i_requested_rate_format = j;
 739                         break;
 740                     }
 741                     else if( p_format_list[j].mSampleRate == p_sys->sfmt_revert.mSampleRate )
 742                     {
 743                         i_current_rate_format = j;
 744                     }
 745                     else
 746                     {
 747                         if( i_backup_rate_format < 0 || p_format_list[j].mSampleRate > p_format_list[i_backup_rate_format].mSampleRate )
 748                             i_backup_rate_format = j;
 749                     }
 750                 }
 751
 752             }
 753
 754             if( i_requested_rate_format >= 0 ) /* We prefer to output at the samplerate of the original audio */
 755                 p_sys->stream_format = p_format_list[i_requested_rate_format];
 756             else if( i_current_rate_format >= 0 ) /* If not possible, we will try to use the current samplerate of the device */
 757                 p_sys->stream_format = p_format_list[i_current_rate_format];
 758             else p_sys->stream_format = p_format_list[i_backup_rate_format]; /* And if we have to, any digital format will be just fine (highest rate possible) */
 759         }
 760         if( p_format_list ) free( p_format_list );
 761     }
 762     if( p_streams ) free( p_streams );
 763
 764     msg_Dbg( p_aout, STREAM_FORMAT_MSG( "original stream format: ", p_sys->sfmt_revert ) );
 765
 766     if( !AudioStreamChangeFormat( p_aout, p_sys->i_stream_id, p_sys->stream_format ) )
 767         return VLC_FALSE;
 768
 769     /* Set the format flags */
 770     if( p_sys->stream_format.mFormatFlags & kAudioFormatFlagIsBigEndian )
 771         p_aout->output.output.i_format = VLC_FOURCC('s','p','d','b');
 772     else
 773         p_aout->output.output.i_format = VLC_FOURCC('s','p','d','i');
 774     p_aout->output.output.i_bytes_per_frame = AOUT_SPDIF_SIZE;
 775     p_aout->output.output.i_frame_length = A52_FRAME_NB;
 776     p_aout->output.i_nb_samples = p_aout->output.output.i_frame_length;
 777     p_aout->output.output.i_rate = (unsigned int)p_sys->stream_format.mSampleRate;
 778     aout_FormatPrepare( &p_aout->output.output );
 779     aout_VolumeNoneInit( p_aout );
 780
 781     /* Add IOProc callback */
 782     err = AudioDeviceAddIOProc( p_sys->i_selected_dev,
 783                                 (AudioDeviceIOProc)RenderCallbackSPDIF,
 784                                 (void *)p_aout );
 785     if( err != noErr )
 786     {
 787         msg_Err( p_aout, "AudioDeviceAddIOProc failed: [%4.4s]", (char *)&err );
 788         return VLC_FALSE;
 789     }
 790
 791     /* Check for the difference between the Device clock and mdate */
 792     p_sys->clock_diff = - (mtime_t)
 793         AudioConvertHostTimeToNanos( AudioGetCurrentHostTime() ) / 1000;
 794     p_sys->clock_diff += mdate();
 795
 796     /* Start device */
 797     err = AudioDeviceStart( p_sys->i_selected_dev, (AudioDeviceIOProc)RenderCallbackSPDIF );
 798     if( err != noErr )
 799     {
 800         msg_Err( p_aout, "AudioDeviceStart failed: [%4.4s]", (char *)&err );
 801
 802         err = AudioDeviceRemoveIOProc( p_sys->i_selected_dev,
 803                                        (AudioDeviceIOProc)RenderCallbackSPDIF );
 804         if( err != noErr )
 805         {
 806             msg_Err( p_aout, "AudioDeviceRemoveIOProc failed: [%4.4s]", (char *)&err );
 807         }
 808         return VLC_FALSE;
 809     }
 810
 811     return VLC_TRUE;
 812 }
 813
 814
 815 /*****************************************************************************
 816  * Close: Close HAL AudioUnit
 817  *****************************************************************************/
 818 static void Close( vlc_object_t * p_this )
 819 {
 820     aout_instance_t     *p_aout = (aout_instance_t *)p_this;
 821     struct aout_sys_t   *p_sys = p_aout->output.p_sys;
 822     OSStatus            err = noErr;
 823     UInt32              i_param_size = 0;
 824
 825     if( p_sys->au_unit )
 826     {
 827         verify_noerr( AudioOutputUnitStop( p_sys->au_unit ) );
 828         verify_noerr( AudioUnitUninitialize( p_sys->au_unit ) );
 829         verify_noerr( CloseComponent( p_sys->au_unit ) );
 830     }
 831
 832     if( p_sys->b_digital )
 833     {
 834         /* Stop device */
 835         err = AudioDeviceStop( p_sys->i_selected_dev,
 836                                (AudioDeviceIOProc)RenderCallbackSPDIF );
 837         if( err != noErr )
 838         {
 839             msg_Err( p_aout, "AudioDeviceStop failed: [%4.4s]", (char *)&err );
 840         }
 841
 842         /* Remove IOProc callback */
 843         err = AudioDeviceRemoveIOProc( p_sys->i_selected_dev,
 844                                        (AudioDeviceIOProc)RenderCallbackSPDIF );
 845         if( err != noErr )
 846         {
 847             msg_Err( p_aout, "AudioDeviceRemoveIOProc failed: [%4.4s]", (char *)&err );
 848         }
 849
 850         if( p_sys->b_revert )
 851         {
 852             AudioStreamChangeFormat( p_aout, p_sys->i_stream_id, p_sys->sfmt_revert );
 853         }
 854
 855         if( p_sys->b_changed_mixing && p_sys->sfmt_revert.mFormatID != kAudioFormat60958AC3 )
 856         {
 857             int b_mix;
 858             Boolean b_writeable;
 859             /* Revert mixable to true if we are allowed to */
 860             err = AudioDeviceGetPropertyInfo( p_sys->i_selected_dev, 0, FALSE, kAudioDevicePropertySupportsMixing,
 861                                         &i_param_size, &b_writeable );
 862
 863             err = AudioDeviceGetProperty( p_sys->i_selected_dev, 0, FALSE, kAudioDevicePropertySupportsMixing,
 864                                         &i_param_size, &b_mix );
 865
 866             if( !err && b_writeable )
 867             {
 868                 msg_Dbg( p_aout, "mixable is: %d", b_mix );
 869                 b_mix = 1;
 870                 err = AudioDeviceSetProperty( p_sys->i_selected_dev, 0, 0, FALSE,
 871                                     kAudioDevicePropertySupportsMixing, i_param_size, &b_mix );
 872             }
 873
 874             if( err != noErr )
 875             {
 876                 msg_Err( p_aout, "failed to set mixmode: [%4.4s]", (char *)&err );
 877             }
 878         }
 879     }
 880
 881     err = AudioHardwareRemovePropertyListener( kAudioHardwarePropertyDevices,
 882                                                HardwareListener );
 883
 884     if( err != noErr )
 885     {
 886         msg_Err( p_aout, "AudioHardwareRemovePropertyListener failed: [%4.4s]", (char *)&err );
 887     }
 888
 889     if( p_sys->i_hog_pid == getpid() )
 890     {
 891         p_sys->i_hog_pid = -1;
 892         i_param_size = sizeof( p_sys->i_hog_pid );
 893         err = AudioDeviceSetProperty( p_sys->i_selected_dev, 0, 0, FALSE,
 894                                          kAudioDevicePropertyHogMode, i_param_size, &p_sys->i_hog_pid );
 895         if( err != noErr ) msg_Err( p_aout, "Could not release hogmode: [%4.4s]", (char *)&err );
 896     }
 897
 898     if( p_sys ) free( p_sys );
 899 }
 900
 901 /*****************************************************************************
 902  * Play: nothing to do
 903  *****************************************************************************/
 904 static void Play( aout_instance_t * p_aout )
 905 {
 906 }
 907
 908
 909 /*****************************************************************************
 910  * Probe: Check which devices the OS has, and add them to our audio-device menu
 911  *****************************************************************************/
 912 static void Probe( aout_instance_t * p_aout )
 913 {
 914     OSStatus            err = noErr;
 915     UInt32              i = 0, i_param_size = 0;
 916     AudioDeviceID       devid_def = 0;
 917     AudioDeviceID       *p_devices = NULL;
 918     vlc_value_t         val, text;
 919
 920     struct aout_sys_t   *p_sys = p_aout->output.p_sys;
 921
 922     /* Get number of devices */
 923     err = AudioHardwareGetPropertyInfo( kAudioHardwarePropertyDevices,
 924                                         &i_param_size, NULL );
 925     if( err != noErr )
 926     {
 927         msg_Err( p_aout, "Could not get number of devices: [%4.4s]", (char *)&err );
 928         goto error;
 929     }
 930
 931     p_sys->i_devices = i_param_size / sizeof( AudioDeviceID );
 932
 933     if( p_sys->i_devices < 1 )
 934     {
 935         msg_Err( p_aout, "No audio output devices were found." );
 936         goto error;
 937     }
 938
 939     msg_Dbg( p_aout, "system has [%ld] device(s)", p_sys->i_devices );
 940
 941     /* Allocate DeviceID array */
 942     p_devices = (AudioDeviceID*)malloc( sizeof(AudioDeviceID) * p_sys->i_devices );
 943     if( p_devices == NULL )
 944     {
 945         msg_Err( p_aout, "out of memory" );
 946         goto error;
 947     }
 948
 949     /* Populate DeviceID array */
 950     err = AudioHardwareGetProperty( kAudioHardwarePropertyDevices,
 951                                     &i_param_size, p_devices );
 952     if( err != noErr )
 953     {
 954         msg_Err( p_aout, "could not get the device IDs: [%4.4s]", (char *)&err );
 955         goto error;
 956     }
 957
 958     /* Find the ID of the default Device */
 959     i_param_size = sizeof( AudioDeviceID );
 960     err = AudioHardwareGetProperty( kAudioHardwarePropertyDefaultOutputDevice,
 961                                     &i_param_size, &devid_def );
 962     if( err != noErr )
 963     {
 964         msg_Err( p_aout, "could not get default audio device: [%4.4s]", (char *)&err );
 965         goto error;
 966     }
 967     p_sys->i_default_dev = devid_def;
 968
 969     var_Create( p_aout, "audio-device", VLC_VAR_INTEGER|VLC_VAR_HASCHOICE );
 970     text.psz_string = _("Audio Device");
 971     var_Change( p_aout, "audio-device", VLC_VAR_SETTEXT, &text, NULL );
 972
 973     for( i = 0; i < p_sys->i_devices; i++ )
 974     {
 975         char *psz_name;
 976         i_param_size = 0;
 977
 978         /* Retrieve the length of the device name */
 979         err = AudioDeviceGetPropertyInfo(
 980                     p_devices[i], 0, VLC_FALSE,
 981                     kAudioDevicePropertyDeviceName,
 982                     &i_param_size, NULL);
 983         if( err ) goto error;
 984
 985         /* Retrieve the name of the device */
 986         psz_name = (char *)malloc( i_param_size );
 987         err = AudioDeviceGetProperty(
 988                     p_devices[i], 0, VLC_FALSE,
 989                     kAudioDevicePropertyDeviceName,
 990                     &i_param_size, psz_name);
 991         if( err ) goto error;
 992
 993         msg_Dbg( p_aout, "DevID: %#lx DevName: %s", p_devices[i], psz_name );
 994
 995         if( !AudioDeviceHasOutput( p_devices[i]) )
 996         {
 997             msg_Dbg( p_aout, "this device is INPUT only. skipping..." );
 998             continue;
 999         }
1000
1001         /* Add the menu entries */
1002         val.i_int = (int)p_devices[i];
1003         text.psz_string = strdup( psz_name );
1004         var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
1005         if( p_sys->i_default_dev == p_devices[i] )
1006         {
1007             /* The default device is the selected device normally */
1008             var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
1009             var_Set( p_aout, "audio-device", val );
1010         }
1011
1012         if( AudioDeviceSupportsDigital( p_aout, p_devices[i] ) )
1013         {
1014             val.i_int = (int)p_devices[i] | AOUT_VAR_SPDIF_FLAG;
1015             asprintf( &text.psz_string, _("%s (Encoded Output)"), psz_name );
1016             var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
1017             if( p_sys->i_default_dev == p_devices[i] && config_GetInt( p_aout, "spdif" ) )
1018             {
1019                 /* We selected to prefer SPDIF output if available
1020                  * then this "dummy" entry should be selected */
1021                 var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
1022                 var_Set( p_aout, "audio-device", val );
1023             }
1024         }
1025
1026         free( psz_name);
1027     }
1028
1029     /* If a device is already "preselected", then use this device */
1030     var_Get( p_aout->p_libvlc, "macosx-audio-device", &val );
1031     if( val.i_int > 0 )
1032     {
1033         var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
1034         var_Set( p_aout, "audio-device", val );
1035     }
1036
1037     /* If we change the device we want to use, we should renegotiate the audio chain */
1038     var_AddCallback( p_aout, "audio-device", AudioDeviceCallback, NULL );
1039
1040     /* Attach a Listener so that we are notified of a change in the Device setup */
1041     err = AudioHardwareAddPropertyListener( kAudioHardwarePropertyDevices,
1042                                             HardwareListener,
1043                                             (void *)p_aout );
1044     if( err )
1045         goto error;
1046
1047     if( p_devices ) free( p_devices );
1048     return;
1049
1050 error:
1051     var_Destroy( p_aout, "audio-device" );
1052     if( p_devices ) free( p_devices );
1053     return;
1054 }
1055
1056 /*****************************************************************************
1057  * AudioDeviceHasOutput: Checks if the Device actually provides any outputs at all
1058  *****************************************************************************/
1059 static int AudioDeviceHasOutput( AudioDeviceID i_dev_id )
1060 {
1061     UInt32            dataSize;
1062     Boolean            isWritable;
1063
1064     verify_noerr( AudioDeviceGetPropertyInfo( i_dev_id, 0, FALSE, kAudioDevicePropertyStreams, &dataSize, &isWritable) );
1065     if (dataSize == 0) return FALSE;
1066
1067     return TRUE;
1068 }
1069
1070 /*****************************************************************************
1071  * AudioDeviceSupportsDigital: Check i_dev_id for digital stream support.
1072  *****************************************************************************/
1073 static int AudioDeviceSupportsDigital( aout_instance_t *p_aout, AudioDeviceID i_dev_id )
1074 {
1075     OSStatus                    err = noErr;
1076     UInt32                      i_param_size = 0;
1077     AudioStreamID               *p_streams = NULL;
1078     int                         i = 0, i_streams = 0;
1079     vlc_bool_t                  b_return = VLC_FALSE;
1080
1081     /* Retrieve all the output streams */
1082     err = AudioDeviceGetPropertyInfo( i_dev_id, 0, FALSE,
1083                                       kAudioDevicePropertyStreams,
1084                                       &i_param_size, NULL );
1085     if( err != noErr )
1086     {
1087         msg_Err( p_aout, "could not get number of streams: [%4.4s]", (char *)&err );
1088         return VLC_FALSE;
1089     }
1090
1091     i_streams = i_param_size / sizeof( AudioStreamID );
1092     p_streams = (AudioStreamID *)malloc( i_param_size );
1093     if( p_streams == NULL )
1094     {
1095         msg_Err( p_aout, "out of memory" );
1096         return VLC_ENOMEM;
1097     }
1098
1099     err = AudioDeviceGetProperty( i_dev_id, 0, FALSE,
1100                                     kAudioDevicePropertyStreams,
1101                                     &i_param_size, p_streams );
1102
1103     if( err != noErr )
1104     {
1105         msg_Err( p_aout, "could not get number of streams: [%4.4s]", (char *)&err );
1106         return VLC_FALSE;
1107     }
1108
1109     for( i = 0; i < i_streams; i++ )
1110     {
1111         if( AudioStreamSupportsDigital( p_aout, p_streams[i] ) )
1112             b_return = VLC_TRUE;
1113     }
1114
1115     if( p_streams ) free( p_streams );
1116     return b_return;
1117 }
1118
1119 /*****************************************************************************
1120  * AudioStreamSupportsDigital: Check i_stream_id for digital stream support.
1121  *****************************************************************************/
1122 static int AudioStreamSupportsDigital( aout_instance_t *p_aout, AudioStreamID i_stream_id )
1123 {
1124     OSStatus                    err = noErr;
1125     UInt32                      i_param_size = 0;
1126     AudioStreamBasicDescription *p_format_list = NULL;
1127     int                         i = 0, i_formats = 0;
1128     vlc_bool_t                  b_return = VLC_FALSE;
1129
1130     /* Retrieve all the stream formats supported by each output stream */
1131     err = AudioStreamGetPropertyInfo( i_stream_id, 0,
1132                                       kAudioStreamPropertyPhysicalFormats,
1133                                       &i_param_size, NULL );
1134     if( err != noErr )
1135     {
1136         msg_Err( p_aout, "could not get number of streamformats: [%4.4s]", (char *)&err );
1137         return VLC_FALSE;
1138     }
1139
1140     i_formats = i_param_size / sizeof( AudioStreamBasicDescription );
1141     p_format_list = (AudioStreamBasicDescription *)malloc( i_param_size );
1142     if( p_format_list == NULL )
1143     {
1144         msg_Err( p_aout, "could not malloc the memory" );
1145         return VLC_FALSE;
1146     }
1147
1148     err = AudioStreamGetProperty( i_stream_id, 0,
1149                                       kAudioStreamPropertyPhysicalFormats,
1150                                       &i_param_size, p_format_list );
1151     if( err != noErr )
1152     {
1153         msg_Err( p_aout, "could not get the list of streamformats: [%4.4s]", (char *)&err );
1154         free( p_format_list);
1155         p_format_list = NULL;
1156         return VLC_FALSE;
1157     }
1158
1159     for( i = 0; i < i_formats; i++ )
1160     {
1161         msg_Dbg( p_aout, STREAM_FORMAT_MSG( "supported format: ", p_format_list[i] ) );
1162
1163         if( p_format_list[i].mFormatID == 'IAC3' ||
1164                   p_format_list[i].mFormatID == kAudioFormat60958AC3 )
1165         {
1166             b_return = VLC_TRUE;
1167         }
1168     }
1169
1170     if( p_format_list ) free( p_format_list );
1171     return b_return;
1172 }
1173
1174 /*****************************************************************************
1175  * AudioStreamChangeFormat: Change i_stream_id to change_format
1176  *****************************************************************************/
1177 static int AudioStreamChangeFormat( aout_instance_t *p_aout, AudioStreamID i_stream_id, AudioStreamBasicDescription change_format )
1178 {
1179     OSStatus            err = noErr;
1180     UInt32              i_param_size = 0;
1181     int i;
1182
1183     struct timeval now;
1184     struct timespec timeout;
1185     struct { vlc_mutex_t lock; vlc_cond_t cond; } w;
1186
1187     msg_Dbg( p_aout, STREAM_FORMAT_MSG( "setting stream format: ", change_format ) );
1188
1189     /* Condition because SetProperty is asynchronious */
1190     vlc_cond_init( p_aout, &w.cond );
1191     vlc_mutex_init( p_aout, &w.lock );
1192     vlc_mutex_lock( &w.lock );
1193
1194     /* Install the callback */
1195     err = AudioStreamAddPropertyListener( i_stream_id, 0,
1196                                       kAudioStreamPropertyPhysicalFormat,
1197                                       StreamListener, (void *)&w );
1198     if( err != noErr )
1199     {
1200         msg_Err( p_aout, "AudioStreamAddPropertyListener failed: [%4.4s]", (char *)&err );
1201         return VLC_FALSE;
1202     }
1203
1204     /* change the format */
1205     err = AudioStreamSetProperty( i_stream_id, 0, 0,
1206                                   kAudioStreamPropertyPhysicalFormat,
1207                                   sizeof( AudioStreamBasicDescription ),
1208                                   &change_format );
1209     if( err != noErr )
1210     {
1211         msg_Err( p_aout, "could not set the stream format: [%4.4s]", (char *)&err );
1212         return VLC_FALSE;
1213     }
1214
1215     /* The AudioStreamSetProperty is not only asynchronious (requiring the locks)
1216      * it is also not atomic in its behaviour.
1217      * Therefore we check 5 times before we really give up.
1218      * FIXME: failing isn't actually implemented yet. */
1219     for( i = 0; i < 5; i++ )
1220     {
1221         AudioStreamBasicDescription actual_format;
1222
1223         gettimeofday( &now, NULL );
1224         timeout.tv_sec = now.tv_sec;
1225         timeout.tv_nsec = (now.tv_usec + 500000) * 1000;
1226
1227         if( pthread_cond_timedwait( &w.cond.cond, &w.lock.mutex, &timeout ) )
1228         {
1229             msg_Dbg( p_aout, "reached timeout" );
1230         }
1231
1232         i_param_size = sizeof( AudioStreamBasicDescription );
1233         err = AudioStreamGetProperty( i_stream_id, 0,
1234                                       kAudioStreamPropertyPhysicalFormat,
1235                                       &i_param_size,
1236                                       &actual_format );
1237
1238         msg_Dbg( p_aout, STREAM_FORMAT_MSG( "actual format in use: ", actual_format ) );
1239         if( actual_format.mSampleRate == change_format.mSampleRate &&
1240             actual_format.mFormatID == change_format.mFormatID &&
1241             actual_format.mFramesPerPacket == change_format.mFramesPerPacket )
1242         {
1243             /* The right format is now active */
1244             break;
1245         }
1246         /* We need to check again */
1247     }
1248
1249     /* Removing the property listener */
1250     err = AudioStreamRemovePropertyListener( i_stream_id, 0,
1251                                             kAudioStreamPropertyPhysicalFormat,
1252                                             StreamListener );
1253     if( err != noErr )
1254     {
1255         msg_Err( p_aout, "AudioStreamRemovePropertyListener failed: [%4.4s]", (char *)&err );
1256         return VLC_FALSE;
1257     }
1258
1259     /* Destroy the lock and condition */
1260     vlc_mutex_unlock( &w.lock );
1261     vlc_mutex_destroy( &w.lock );
1262     vlc_cond_destroy( &w.cond );
1263
1264     return VLC_TRUE;
1265 }
1266
1267 /*****************************************************************************
1268  * RenderCallbackAnalog: This function is called everytime the AudioUnit wants
1269  * us to provide some more audio data.
1270  * Don't print anything during normal playback, calling blocking function from
1271  * this callback is not allowed.
1272  *****************************************************************************/
1273 static OSStatus RenderCallbackAnalog( vlc_object_t *_p_aout,
1274                                       AudioUnitRenderActionFlags *ioActionFlags,
1275                                       const AudioTimeStamp *inTimeStamp,
1276                                       unsigned int inBusNummer,
1277                                       unsigned int inNumberFrames,
1278                                       AudioBufferList *ioData )
1279 {
1280     AudioTimeStamp  host_time;
1281     mtime_t         current_date = 0;
1282     uint32_t        i_mData_bytes = 0;
1283
1284     aout_instance_t * p_aout = (aout_instance_t *)_p_aout;
1285     struct aout_sys_t * p_sys = p_aout->output.p_sys;
1286
1287     host_time.mFlags = kAudioTimeStampHostTimeValid;
1288     AudioDeviceTranslateTime( p_sys->i_selected_dev, inTimeStamp, &host_time );
1289
1290     /* Check for the difference between the Device clock and mdate */
1291     p_sys->clock_diff = - (mtime_t)
1292         AudioConvertHostTimeToNanos( AudioGetCurrentHostTime() ) / 1000;
1293     p_sys->clock_diff += mdate();
1294
1295     current_date = p_sys->clock_diff +
1296                    AudioConvertHostTimeToNanos( host_time.mHostTime ) / 1000;
1297                    //- ((mtime_t) 1000000 / p_aout->output.output.i_rate * 31 ); // 31 = Latency in Frames. retrieve somewhere
1298
1299     if( ioData == NULL && ioData->mNumberBuffers < 1 )
1300     {
1301         msg_Err( p_aout, "no iodata or buffers");
1302         return 0;
1303     }
1304     if( ioData->mNumberBuffers > 1 )
1305         msg_Err( p_aout, "well this is weird. seems like there is more than one buffer..." );
1306
1307
1308     if( p_sys->i_total_bytes > 0 )
1309     {
1310         i_mData_bytes = __MIN( p_sys->i_total_bytes - p_sys->i_read_bytes, ioData->mBuffers[0].mDataByteSize );
1311         p_aout->p_libvlc->pf_memcpy( ioData->mBuffers[0].mData, &p_sys->p_remainder_buffer[p_sys->i_read_bytes], i_mData_bytes );
1312         p_sys->i_read_bytes += i_mData_bytes;
1313         current_date += (mtime_t) ( (mtime_t) 1000000 / p_aout->output.output.i_rate ) *
1314                         ( i_mData_bytes / 4 / aout_FormatNbChannels( &p_aout->output.output )  ); // 4 is fl32 specific
1315
1316         if( p_sys->i_read_bytes >= p_sys->i_total_bytes )
1317             p_sys->i_read_bytes = p_sys->i_total_bytes = 0;
1318     }
1319
1320     while( i_mData_bytes < ioData->mBuffers[0].mDataByteSize )
1321     {
1322         /* We don't have enough data yet */
1323         aout_buffer_t * p_buffer;
1324         p_buffer = aout_OutputNextBuffer( p_aout, current_date , VLC_FALSE );
1325
1326         if( p_buffer != NULL )
1327         {
1328             uint32_t i_second_mData_bytes = __MIN( p_buffer->i_nb_bytes, ioData->mBuffers[0].mDataByteSize - i_mData_bytes );
1329
1330             p_aout->p_libvlc->pf_memcpy( (uint8_t *)ioData->mBuffers[0].mData + i_mData_bytes, p_buffer->p_buffer, i_second_mData_bytes );
1331             i_mData_bytes += i_second_mData_bytes;
1332
1333             if( i_mData_bytes >= ioData->mBuffers[0].mDataByteSize )
1334             {
1335                 p_sys->i_total_bytes = p_buffer->i_nb_bytes - i_second_mData_bytes;
1336                 p_aout->p_libvlc->pf_memcpy( p_sys->p_remainder_buffer, &p_buffer->p_buffer[i_second_mData_bytes], p_sys->i_total_bytes );
1337             }
1338             else
1339             {
1340                 /* update current_date */
1341                 current_date += (mtime_t) ( (mtime_t) 1000000 / p_aout->output.output.i_rate ) *
1342                                 ( i_second_mData_bytes / 4 / aout_FormatNbChannels( &p_aout->output.output )  ); // 4 is fl32 specific
1343             }
1344             aout_BufferFree( p_buffer );
1345         }
1346         else
1347         {
1348              p_aout->p_libvlc->pf_memset( (uint8_t *)ioData->mBuffers[0].mData +i_mData_bytes, 0, ioData->mBuffers[0].mDataByteSize - i_mData_bytes );
1349              i_mData_bytes += ioData->mBuffers[0].mDataByteSize - i_mData_bytes;
1350         }
1351     }
1352     return( noErr );
1353 }
1354
1355 /*****************************************************************************
1356  * RenderCallbackSPDIF: callback for SPDIF audio output
1357  *****************************************************************************/
1358 static OSStatus RenderCallbackSPDIF( AudioDeviceID inDevice,
1359                                     const AudioTimeStamp * inNow,
1360                                     const void * inInputData,
1361                                     const AudioTimeStamp * inInputTime,
1362                                     AudioBufferList * outOutputData,
1363                                     const AudioTimeStamp * inOutputTime,
1364                                     void * threadGlobals )
1365 {
1366     aout_buffer_t * p_buffer;
1367     mtime_t         current_date;
1368
1369     aout_instance_t * p_aout = (aout_instance_t *)threadGlobals;
1370     struct aout_sys_t * p_sys = p_aout->output.p_sys;
1371
1372     /* Check for the difference between the Device clock and mdate */
1373     p_sys->clock_diff = - (mtime_t)
1374         AudioConvertHostTimeToNanos( inNow->mHostTime ) / 1000;
1375     p_sys->clock_diff += mdate();
1376
1377     current_date = p_sys->clock_diff +
1378                    AudioConvertHostTimeToNanos( inOutputTime->mHostTime ) / 1000;
1379                    //- ((mtime_t) 1000000 / p_aout->output.output.i_rate * 31 ); // 31 = Latency in Frames. retrieve somewhere
1380
1381     p_buffer = aout_OutputNextBuffer( p_aout, current_date, VLC_TRUE );
1382
1383 #define BUFFER outOutputData->mBuffers[p_sys->i_stream_index]
1384     if( p_buffer != NULL )
1385     {
1386         if( (int)BUFFER.mDataByteSize != (int)p_buffer->i_nb_bytes)
1387             msg_Warn( p_aout, "bytesize: %d nb_bytes: %d", (int)BUFFER.mDataByteSize, (int)p_buffer->i_nb_bytes );
1388
1389         /* move data into output data buffer */
1390         p_aout->p_libvlc->pf_memcpy( BUFFER.mData,
1391                                   p_buffer->p_buffer, p_buffer->i_nb_bytes );
1392         aout_BufferFree( p_buffer );
1393     }
1394     else
1395     {
1396         p_aout->p_libvlc->pf_memset( BUFFER.mData, 0, BUFFER.mDataByteSize );
1397     }
1398 #undef BUFFER
1399
1400     return( noErr );
1401 }
1402
1403 /*****************************************************************************
1404  * HardwareListener: Warns us of changes in the list of registered devices
1405  *****************************************************************************/
1406 static OSStatus HardwareListener( AudioHardwarePropertyID inPropertyID,
1407                                   void * inClientData )
1408 {
1409     OSStatus err = noErr;
1410     aout_instance_t     *p_aout = (aout_instance_t *)inClientData;
1411
1412     switch( inPropertyID )
1413     {
1414         case kAudioHardwarePropertyDevices:
1415         {
1416             /* something changed in the list of devices */
1417             /* We trigger the audio-device's aout_ChannelsRestart callback */
1418             var_Change( p_aout, "audio-device", VLC_VAR_TRIGGER_CALLBACKS, NULL, NULL );
1419             var_Destroy( p_aout, "audio-device" );
1420         }
1421         break;
1422     }
1423
1424     return( err );
1425 }
1426
1427 /*****************************************************************************
1428  * StreamListener
1429  *****************************************************************************/
1430 static OSStatus StreamListener( AudioStreamID inStream,
1431                                 UInt32 inChannel,
1432                                 AudioDevicePropertyID inPropertyID,
1433                                 void * inClientData )
1434 {
1435     OSStatus err = noErr;
1436     struct { vlc_mutex_t lock; vlc_cond_t cond; } * w = inClientData;
1437
1438     switch( inPropertyID )
1439     {
1440         case kAudioStreamPropertyPhysicalFormat:
1441             vlc_mutex_lock( &w->lock );
1442             vlc_cond_signal( &w->cond );
1443             vlc_mutex_unlock( &w->lock );
1444             break;
1445
1446         default:
1447             break;
1448     }
1449     return( err );
1450 }
1451
1452 /*****************************************************************************
1453  * AudioDeviceCallback: Callback triggered when the audio-device variable is changed
1454  *****************************************************************************/
1455 static int AudioDeviceCallback( vlc_object_t *p_this, const char *psz_variable,
1456                      vlc_value_t old_val, vlc_value_t new_val, void *param )
1457 {
1458     aout_instance_t *p_aout = (aout_instance_t *)p_this;
1459     var_Set( p_aout->p_libvlc, "macosx-audio-device", new_val );
1460     msg_Dbg( p_aout, "Set Device: %#x", new_val.i_int );
1461     return aout_ChannelsRestart( p_this, psz_variable, old_val, new_val, param );
1462 }
1463