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

   1 /*****************************************************************************
   2  * auhal.c: AUHAL output plugin
   3  *****************************************************************************
   4  * Copyright (C) 2005 VideoLAN
   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., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27 #include <string.h>
  28 #include <stdlib.h>
  29
  30 #include <vlc/vlc.h>
  31 #include <vlc/aout.h>
  32
  33 #include "aout_internal.h"
  34
  35 #include <CoreAudio/CoreAudio.h>
  36 #include <CoreAudio/CoreAudioTypes.h>
  37 #include <AudioUnit/AudioUnitProperties.h>
  38 #include <AudioUnit/AudioUnitParameters.h>
  39 #include <AudioUnit/AudioOutputUnit.h>
  40 #include <AudioToolbox/AudioFormat.h>
  41
  42 #define STREAM_FORMAT_MSG( pre, sfm ) \
  43     pre ":\nsamplerate: [%ld]\nFormatID: [%4.4s]\nFormatFlags: [%ld]\nBypesPerPacket: [%ld]\nFramesPerPacket: [%ld]\nBytesPerFrame: [%ld]\nChannelsPerFrame: [%ld]\nBitsPerChannel[%ld]", \
  44     (UInt32)sfm.mSampleRate, (char *)&sfm.mFormatID, \
  45     sfm.mFormatFlags, sfm.mBytesPerPacket, \
  46     sfm.mFramesPerPacket, sfm.mBytesPerFrame, \
  47     sfm.mChannelsPerFrame, sfm.mBitsPerChannel
  48
  49 #define BUFSIZE 0xffffff
  50
  51 /*****************************************************************************
  52  * aout_sys_t: private audio output method descriptor
  53  *****************************************************************************
  54  * This structure is part of the audio output thread descriptor.
  55  * It describes the CoreAudio specific properties of an output thread.
  56  *****************************************************************************/
  57 struct aout_sys_t
  58 {
  59     AudioDeviceID               i_default_dev;  /* Keeps DeviceID of defaultOutputDevice */
  60     AudioDeviceID               i_selected_dev; /* Keeps DeviceID of the selected device */
  61     UInt32                      i_devices;      /* Number of CoreAudio Devices */
  62     vlc_bool_t                  b_supports_digital;/* Does the currently selected device support digital mode? */
  63     vlc_bool_t                  b_digital;      /* Are we running in digital mode? */
  64     Component                   au_component;   /* The Audiocomponent we use */
  65     AudioUnit                   au_unit;        /* The AudioUnit we use */
  66     mtime_t                     clock_diff;
  67     uint8_t                      p_remainder_buffer[BUFSIZE];
  68     uint32_t                    i_read_bytes;
  69     uint32_t                    i_total_bytes;
  70     audio_date_t                end_date_t;
  71
  72
  73 };
  74
  75 /*****************************************************************************
  76  * Local prototypes.
  77  *****************************************************************************/
  78 static int      Open                    ( vlc_object_t * );
  79 static void     Close                   ( vlc_object_t * );
  80
  81 static void     Play                    ( aout_instance_t *);
  82
  83 static int      Probe                   ( aout_instance_t * );
  84 static int      DeviceDigitalMode       ( aout_instance_t *, AudioDeviceID );
  85 int             AudioDeviceHasOutput    ( AudioDeviceID );
  86 static int      DigitalInit             ( aout_instance_t * );
  87
  88 static OSStatus RenderCallbackAnalog    ( vlc_object_t *, AudioUnitRenderActionFlags *, const AudioTimeStamp *,
  89                                           unsigned int, unsigned int, AudioBufferList *);
  90 static OSStatus HardwareListener        ( AudioHardwarePropertyID, void *);
  91
  92 /*****************************************************************************
  93  * Module descriptor
  94  *****************************************************************************/
  95 #define ADEV_TEXT N_("Audio Device")
  96 #define ADEV_LONGTEXT N_("Choose a number corresponding to the number of an " \
  97     "audio device, as listed in your 'Audio Device' menu. This device will " \
  98     "then be used by default for audio playback.")
  99
 100 vlc_module_begin();
 101     set_shortname( "auhal" );
 102     set_description( _("HAL AudioUnit output") );
 103     set_capability( "audio output", 101 );
 104     set_category( CAT_AUDIO );
 105     set_subcategory( SUBCAT_AUDIO_AOUT );
 106     set_callbacks( Open, Close );
 107     //add_integer( "coreaudio-dev", -1, NULL, ADEV_TEXT, ADEV_LONGTEXT, VLC_FALSE );
 108 vlc_module_end();
 109
 110 /*****************************************************************************
 111  * Open: open a HAL AudioUnit
 112  *****************************************************************************/
 113 static int Open( vlc_object_t * p_this )
 114 {
 115     OSStatus                err = noErr;
 116     ComponentDescription    desc;
 117     UInt32                  i_param_size,i;
 118     struct aout_sys_t       *p_sys;
 119     vlc_value_t             val;
 120     aout_instance_t         *p_aout = (aout_instance_t *)p_this;
 121
 122     /* Allocate structure */
 123     p_sys = (struct aout_sys_t *)malloc( sizeof( struct aout_sys_t ) );
 124     if( p_sys == NULL )
 125     {
 126         msg_Err( p_aout, "out of memory" );
 127         return( VLC_ENOMEM );
 128     }
 129
 130     memset( p_sys, 0, sizeof( struct aout_sys_t ) );
 131
 132     p_sys->b_digital = VLC_FALSE; /* We assume we are not digital */
 133
 134     p_aout->output.p_sys = p_sys;
 135     p_aout->output.pf_play = Play;
 136
 137     aout_FormatPrint( p_aout, "VLC is looking for:\n", (audio_sample_format_t *)&p_aout->output.output );
 138
 139     /* Build a list of devices */
 140     if( var_Type( p_aout, "audio-device" ) == 0 )
 141     {
 142         Probe( p_aout );
 143         /*if( Probe( p_aout ) != VLC_SUCCESS );
 144         {
 145             msg_Err( p_aout, "Probe failed" );
 146             free( p_sys );
 147             return VLC_EGENERIC;
 148         }*/
 149     }
 150
 151     /* What device do we want? */
 152     if( var_Get( p_aout, "audio-device", &val ) < 0 )
 153     {
 154         msg_Err( p_aout, "audio-device var does not exist" );
 155         free( p_sys );
 156         return( VLC_ENOVAR );
 157     }
 158     p_sys->i_selected_dev = val.i_int;
 159
 160     /* what is vlc format? if digital, take digital route else AUHAL route */
 161     DeviceDigitalMode( p_aout, p_sys->i_selected_dev );
 162     /*if( DeviceDigitalMode( p_aout, p_sys->i_selected_dev ) != VLC_SUCCESS );
 163     {
 164         msg_Err( p_aout, "DeviceDigitalMode failed" );
 165         free( p_sys );
 166         return VLC_EGENERIC;
 167     }
 168     */
 169
 170     if( AOUT_FMT_NON_LINEAR( &p_aout->output.output ) && p_sys->b_supports_digital )
 171     {
 172         p_sys->b_digital = VLC_TRUE;
 173         p_aout->output.output.i_format = VLC_FOURCC('s','p','d','i');
 174         msg_Dbg( p_aout, "we found a digital stream, and we WANT a digital stream" );
 175     }
 176     else if( AOUT_FMT_NON_LINEAR( &p_aout->output.output ) && !p_sys->b_supports_digital )
 177     {
 178         msg_Dbg( p_aout, "we had requested a digital stream, but it's not possible for this device" );
 179     }
 180
 181     /* If analog only start setting up AUHAL */
 182
 183     /* Lets go find our Component */
 184     desc.componentType = kAudioUnitType_Output;
 185     desc.componentSubType = kAudioUnitSubType_HALOutput;
 186     desc.componentManufacturer = kAudioUnitManufacturer_Apple;
 187     desc.componentFlags = 0;
 188     desc.componentFlagsMask = 0;
 189
 190     p_sys->au_component = FindNextComponent( NULL, &desc );
 191     if( p_sys->au_component == NULL )
 192     {
 193         msg_Err( p_aout, "we cannot find our HAL component" );
 194         free( p_sys );
 195         return VLC_EGENERIC;
 196     }
 197
 198     err = OpenAComponent( p_sys->au_component, &p_sys->au_unit );
 199     if( err )
 200     {
 201
 202         msg_Err( p_aout, "we cannot find our HAL component" );
 203         free( p_sys );
 204         return VLC_EGENERIC;
 205     }
 206
 207     /* Enable IO for the component */
 208
 209     /* Set the device */
 210     verify_noerr( AudioUnitSetProperty( p_sys->au_unit,
 211                          kAudioOutputUnitProperty_CurrentDevice,
 212                          kAudioUnitScope_Global,
 213                          0,
 214                          &p_sys->i_selected_dev,
 215                          sizeof(p_sys->i_selected_dev)));
 216
 217     /* Get the current format */
 218     AudioStreamBasicDescription DeviceFormat;
 219
 220     i_param_size = sizeof(AudioStreamBasicDescription);
 221
 222     verify_noerr( AudioUnitGetProperty( p_sys->au_unit,
 223                                    kAudioUnitProperty_StreamFormat,
 224                                    kAudioUnitScope_Input,
 225                                    0,
 226                                    &DeviceFormat,
 227                                    &i_param_size ));
 228
 229     msg_Dbg( p_aout, STREAM_FORMAT_MSG( "current format is " , DeviceFormat ) );
 230
 231     /* Get the channel layout */
 232     AudioChannelLayout *layout;
 233     verify_noerr( AudioUnitGetPropertyInfo( p_sys->au_unit,
 234                                    kAudioDevicePropertyPreferredChannelLayout,
 235                                    kAudioUnitScope_Output,
 236                                    0,
 237                                    &i_param_size,
 238                                    NULL ));
 239
 240     layout = (AudioChannelLayout *)malloc( i_param_size);
 241
 242     verify_noerr( AudioUnitGetProperty( p_sys->au_unit,
 243                                    kAudioDevicePropertyPreferredChannelLayout,
 244                                    kAudioUnitScope_Output,
 245                                    0,
 246                                    layout,
 247                                    &i_param_size ));
 248
 249     /* Lets fill out the ChannelLayout */
 250     if( layout->mChannelLayoutTag == kAudioChannelLayoutTag_UseChannelBitmap)
 251     {
 252         msg_Dbg( p_aout, "bitmap defined channellayout" );
 253         verify_noerr( AudioFormatGetProperty( kAudioFormatProperty_ChannelLayoutForBitmap,
 254                                 sizeof( UInt32), &layout->mChannelBitmap,
 255                                 &i_param_size,
 256                                 layout ));
 257     }
 258     else if( layout->mChannelLayoutTag != kAudioChannelLayoutTag_UseChannelDescriptions )
 259     {
 260         msg_Dbg( p_aout, "layouttags defined channellayout" );
 261         verify_noerr( AudioFormatGetProperty( kAudioFormatProperty_ChannelLayoutForTag,
 262                                 sizeof( AudioChannelLayoutTag ), &layout->mChannelLayoutTag,
 263                                 &i_param_size,
 264                                 layout ));
 265     }
 266
 267     msg_Dbg( p_aout, "Layout of AUHAL has %d channels" , (int)layout->mNumberChannelDescriptions );
 268
 269     p_aout->output.output.i_physical_channels = 0;
 270     for( i = 0; i < layout->mNumberChannelDescriptions; i++ )
 271     {
 272         msg_Dbg( p_aout, "This is channel: %d", (int)layout->mChannelDescriptions[i].mChannelLabel );
 273
 274         switch( layout->mChannelDescriptions[i].mChannelLabel )
 275         {
 276             case kAudioChannelLabel_Left:
 277                 p_aout->output.output.i_physical_channels |= AOUT_CHAN_LEFT;
 278                 continue;
 279             case kAudioChannelLabel_Right:
 280                 p_aout->output.output.i_physical_channels |= AOUT_CHAN_RIGHT;
 281                 continue;
 282             case kAudioChannelLabel_Center:
 283                 p_aout->output.output.i_physical_channels |= AOUT_CHAN_CENTER;
 284                 continue;
 285             case kAudioChannelLabel_LFEScreen:
 286                 p_aout->output.output.i_physical_channels |= AOUT_CHAN_LFE;
 287                 continue;
 288             case kAudioChannelLabel_LeftSurround:
 289                 p_aout->output.output.i_physical_channels |= AOUT_CHAN_REARLEFT;
 290                 continue;
 291             case kAudioChannelLabel_RightSurround:
 292                 p_aout->output.output.i_physical_channels |= AOUT_CHAN_REARRIGHT;
 293                 continue;
 294             case kAudioChannelLabel_RearSurroundLeft:
 295                 p_aout->output.output.i_physical_channels |= AOUT_CHAN_MIDDLELEFT;
 296                 continue;
 297             case kAudioChannelLabel_RearSurroundRight:
 298                 p_aout->output.output.i_physical_channels |= AOUT_CHAN_MIDDLERIGHT;
 299                 continue;
 300             case kAudioChannelLabel_CenterSurround:
 301                 p_aout->output.output.i_physical_channels |= AOUT_CHAN_REARCENTER;
 302                 continue;
 303             default:
 304                 msg_Warn( p_aout, "Unrecognized channel form provided by driver: %d", (int)layout->mChannelDescriptions[i].mChannelLabel );
 305                 if( i == 0 )
 306                 {
 307                     msg_Warn( p_aout, "Probably no channellayout is set. force based on channelcount" );
 308                     switch( layout->mNumberChannelDescriptions )
 309                     {
 310                         /* We make assumptions based on number of channels here.
 311                          * Unfortunatly Apple has provided no 100% method to retrieve the speaker configuration */
 312                         case 1:
 313                             p_aout->output.output.i_physical_channels = AOUT_CHAN_CENTER;
 314                             break;
 315                         case 4:
 316                             p_aout->output.output.i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
 317                                                                         AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
 318                             break;
 319                         case 6:
 320                             p_aout->output.output.i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
 321                                                                         AOUT_CHAN_CENTER | AOUT_CHAN_LFE |
 322                                                                         AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
 323                             break;
 324                         case 7:
 325                             p_aout->output.output.i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
 326                                                                         AOUT_CHAN_CENTER | AOUT_CHAN_LFE |
 327                                                                         AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT | AOUT_CHAN_REARCENTER;
 328                             break;
 329                         case 8:
 330                             p_aout->output.output.i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
 331                                                                         AOUT_CHAN_CENTER | AOUT_CHAN_LFE |
 332                                                                         AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT |
 333                                                                         AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
 334                             break;
 335                         case 2:
 336                         default:
 337                             p_aout->output.output.i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
 338                     }
 339                 }
 340                 break;
 341         }
 342     }
 343     free( layout );
 344
 345     msg_Dbg( p_aout, "defined %d physical channels for vlc core", aout_FormatNbChannels( &p_aout->output.output ) );
 346     msg_Dbg( p_aout, "%s", aout_FormatPrintChannels( &p_aout->output.output ));
 347
 348     AudioChannelLayout new_layout;
 349     memset (&new_layout, 0, sizeof(new_layout));
 350     switch( aout_FormatNbChannels( &p_aout->output.output ) )
 351     {
 352         case 1:
 353             new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_Mono;
 354             break;
 355         case 2:
 356             new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_Stereo;
 357             break;
 358         case 3:
 359             if( p_aout->output.output.i_physical_channels & AOUT_CHAN_CENTER )
 360             {
 361                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_7; // L R C
 362             }
 363             else if( p_aout->output.output.i_physical_channels & AOUT_CHAN_LFE )
 364             {
 365                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_4; // L R LFE
 366             }
 367             break;
 368         case 4:
 369             if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_CENTER | AOUT_CHAN_LFE ) )
 370             {
 371                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_10; // L R C LFE
 372             }
 373             else if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT ) )
 374             {
 375                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_3; // L R Ls Rs
 376             }
 377             else if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_CENTER | AOUT_CHAN_REARCENTER ) )
 378             {
 379                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_3; // L R C Cs
 380             }
 381             break;
 382         case 5:
 383             if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_CENTER ) )
 384             {
 385                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_19; // L R Ls Rs C
 386             }
 387             else if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_LFE ) )
 388             {
 389                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_18; // L R Ls Rs LFE
 390             }
 391             break;
 392         case 6:
 393             new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_20; // L R Ls Rs C LFE
 394             break;
 395         case 7:
 396             /* FIXME: This is incorrect. VLC uses the internal ordering: L R Lm Rm Lr Rr C LFE but this is wrong */
 397             new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_MPEG_6_1_A; // L R C LFE Ls Rs Cs
 398             break;
 399         case 8:
 400             /* FIXME: This is incorrect. VLC uses the internal ordering: L R Lm Rm Lr Rr C LFE but this is wrong */
 401             new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_MPEG_7_1_A; // L R C LFE Ls Rs Lc Rc
 402             break;
 403     }
 404
 405     /* Set up the format to be used */
 406     DeviceFormat.mSampleRate = p_aout->output.output.i_rate;
 407     DeviceFormat.mFormatID = kAudioFormatLinearPCM;
 408
 409     /* We use float 32. It's the best supported format by both VLC and Coreaudio */
 410     p_aout->output.output.i_format = VLC_FOURCC( 'f','l','3','2');
 411     DeviceFormat.mFormatFlags = kAudioFormatFlagsNativeFloatPacked;
 412     DeviceFormat.mBitsPerChannel = 32;
 413     DeviceFormat.mChannelsPerFrame = aout_FormatNbChannels( &p_aout->output.output );
 414
 415     /* Calculate framesizes and stuff */
 416     aout_FormatPrepare( &p_aout->output.output );
 417     DeviceFormat.mFramesPerPacket = 1;
 418     DeviceFormat.mBytesPerFrame = DeviceFormat.mBitsPerChannel * DeviceFormat.mChannelsPerFrame / 8;
 419     DeviceFormat.mBytesPerPacket = DeviceFormat.mBytesPerFrame * DeviceFormat.mFramesPerPacket;
 420
 421     i_param_size = sizeof(AudioStreamBasicDescription);
 422     /* Set desired format (Use CAStreamBasicDescription )*/
 423     verify_noerr( AudioUnitSetProperty( p_sys->au_unit,
 424                                    kAudioUnitProperty_StreamFormat,
 425                                    kAudioUnitScope_Input,
 426                                    0,
 427                                    &DeviceFormat,
 428                                    i_param_size ));
 429
 430     msg_Dbg( p_aout, STREAM_FORMAT_MSG( "we set the AU format: " , DeviceFormat ) );
 431
 432     /* Retrieve actual format??? */
 433     verify_noerr( AudioUnitGetProperty( p_sys->au_unit,
 434                                    kAudioUnitProperty_StreamFormat,
 435                                    kAudioUnitScope_Input,
 436                                    0,
 437                                    &DeviceFormat,
 438                                    &i_param_size ));
 439
 440     msg_Dbg( p_aout, STREAM_FORMAT_MSG( "the actual set AU format is " , DeviceFormat ) );
 441
 442     p_aout->output.i_nb_samples = 2048;
 443     aout_VolumeSoftInit( p_aout );
 444
 445     /* Let's pray for the following operation to be atomic... */
 446     p_sys->clock_diff = - (mtime_t)
 447         AudioConvertHostTimeToNanos( AudioGetCurrentHostTime() ) / 1000;
 448     p_sys->clock_diff += mdate();
 449
 450     p_sys->i_read_bytes = 0;
 451     p_sys->i_total_bytes = 0;
 452
 453     /* set the IOproc callback */
 454     AURenderCallbackStruct input;
 455     input.inputProc = (AURenderCallback) RenderCallbackAnalog;
 456     input.inputProcRefCon = p_aout;
 457
 458     verify_noerr( AudioUnitSetProperty( p_sys->au_unit,
 459                             kAudioUnitProperty_SetRenderCallback,
 460                             kAudioUnitScope_Input,
 461                             0, &input, sizeof( input ) ) );
 462
 463     input.inputProc = (AURenderCallback) RenderCallbackAnalog;
 464     input.inputProcRefCon = p_aout;
 465
 466     /* Set the new_layout as the layout VLC feeds to the AU unit */
 467     verify_noerr( AudioUnitSetProperty( p_sys->au_unit,
 468                             kAudioUnitProperty_AudioChannelLayout,
 469                             kAudioUnitScope_Input,
 470                             0, &new_layout, sizeof(new_layout) ) );
 471
 472     /* AU initiliaze */
 473     verify_noerr( AudioUnitInitialize(p_sys->au_unit) );
 474
 475     verify_noerr( AudioOutputUnitStart(p_sys->au_unit) );
 476     return( VLC_SUCCESS );
 477 }
 478
 479 /*****************************************************************************
 480  * Close: Close HAL AudioUnit
 481  *****************************************************************************/
 482 static void Close( vlc_object_t * p_this )
 483 {
 484     aout_instance_t     *p_aout = (aout_instance_t *)p_this;
 485     struct aout_sys_t   *p_sys = p_aout->output.p_sys;
 486
 487     if( p_sys->au_unit )
 488     {
 489         verify_noerr( AudioOutputUnitStop( p_sys->au_unit ) );
 490         verify_noerr( AudioUnitUninitialize( p_sys->au_unit ) );
 491         verify_noerr( CloseComponent( p_sys->au_unit ) );
 492     }
 493     free( p_sys );
 494 }
 495
 496 /*****************************************************************************
 497  * Play: nothing to do
 498  *****************************************************************************/
 499 static void Play( aout_instance_t * p_aout )
 500 {
 501 }
 502
 503
 504 /*****************************************************************************
 505  * Probe
 506  *****************************************************************************/
 507 static int Probe( aout_instance_t * p_aout )
 508 {
 509     OSStatus            err = noErr;
 510     UInt32              i, i_param_size;
 511     AudioDeviceID       devid_def;
 512     AudioDeviceID       *p_devices = NULL;
 513     vlc_value_t         val, text;
 514
 515     struct aout_sys_t   *p_sys = p_aout->output.p_sys;
 516
 517     /* Get number of devices */
 518     err = AudioHardwareGetPropertyInfo( kAudioHardwarePropertyDevices,
 519                                         &i_param_size, NULL );
 520     if( err != noErr )
 521     {
 522         msg_Err( p_aout, "could not get number of devices: [%4.4s]", (char *)&err );
 523         goto error;
 524     }
 525
 526     p_sys->i_devices = i_param_size / sizeof( AudioDeviceID );
 527
 528     if( p_sys->i_devices < 1 )
 529     {
 530         msg_Err( p_aout, "no devices found" );
 531         goto error;
 532     }
 533
 534     msg_Dbg( p_aout, "system has [%ld] device(s)", p_sys->i_devices );
 535
 536     /* Allocate DeviceID array */
 537     p_devices = (AudioDeviceID *)malloc( i_param_size );
 538     if( p_devices == NULL )
 539     {
 540         msg_Err( p_aout, "out of memory" );
 541         goto error;
 542     }
 543
 544     /* Populate DeviceID array */
 545     err = AudioHardwareGetProperty( kAudioHardwarePropertyDevices,
 546                                     &i_param_size, (void *)p_devices );
 547     if( err != noErr )
 548     {
 549         msg_Err( p_aout, "could not get the device ID's: [%4.4s]", (char *)&err );
 550         goto error;
 551     }
 552
 553     /* Find the ID of the default Device */
 554     i_param_size = sizeof( AudioDeviceID );
 555     err = AudioHardwareGetProperty( kAudioHardwarePropertyDefaultOutputDevice,
 556                                     &i_param_size, (void *)&devid_def );
 557     if( err != noErr )
 558     {
 559         msg_Err( p_aout, "could not get default audio device: [%4.4s]", (char *)&err );
 560         goto error;
 561     }
 562     p_sys->i_default_dev = devid_def;
 563
 564     var_Create( p_aout, "audio-device", VLC_VAR_INTEGER|VLC_VAR_HASCHOICE );
 565     text.psz_string = _("Audio Device");
 566     var_Change( p_aout, "audio-device", VLC_VAR_SETTEXT, &text, NULL );
 567
 568     for( i = 0; i < p_sys->i_devices; i++ )
 569     {
 570         char psz_devuid[1024];
 571         char psz_name[1024];
 572         CFStringRef devUID;
 573
 574         i_param_size = sizeof psz_name;
 575         err = AudioDeviceGetProperty(
 576                     p_devices[i], 0, VLC_FALSE,
 577                     kAudioDevicePropertyDeviceName,
 578                     &i_param_size, psz_name);
 579         if( err )
 580             goto error;
 581
 582         i_param_size = sizeof(CFStringRef);
 583         err = AudioDeviceGetProperty(
 584                     p_devices[i], 0, VLC_FALSE,
 585                     kAudioDevicePropertyDeviceUID,
 586                     &i_param_size, &devUID);
 587         if( err )
 588             goto error;
 589
 590         CFStringGetCString( devUID, psz_devuid, sizeof psz_devuid, CFStringGetSystemEncoding() );
 591         msg_Dbg( p_aout, "DevID: %lu  DevName: %s  DevUID: %s", p_devices[i], psz_name, psz_devuid );
 592         CFRelease( devUID );
 593
 594         if( !AudioDeviceHasOutput(p_aout, p_devices[i]) )
 595         {
 596             msg_Dbg( p_aout, "this device is INPUT only. skipping..." );
 597             continue;
 598         }
 599
 600         val.i_int = (int) p_devices[i];
 601         text.psz_string = psz_name;
 602         var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
 603         if( devid_def == p_devices[i] )
 604         {
 605             var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
 606             var_Set( p_aout, "audio-device", val );
 607         }
 608     }
 609     var_AddCallback( p_aout, "audio-device", aout_ChannelsRestart, NULL );
 610
 611     /* attach a Listener so that we are notified of a change in the Device setup */
 612     /* err = AudioHardwareAddPropertyListener( kAudioHardwarePropertyDevices,
 613                                             HardwareListener,
 614                                             (void *)p_aout );
 615     if( err )
 616         goto error;*/
 617
 618     msg_Dbg( p_aout, "succesful finish of deviceslist" );
 619     if( p_devices ) free( p_devices );
 620     return (VLC_SUCCESS);
 621
 622 error:
 623     var_Destroy( p_aout, "audio-device" );
 624     if( p_devices ) free( p_devices );
 625     return VLC_EGENERIC;
 626 }
 627
 628 /*****************************************************************************
 629  * DeviceDigitalMode: Check i_dev_id for digital stream support.
 630  *****************************************************************************/
 631 static int DeviceDigitalMode( aout_instance_t *p_aout, AudioDeviceID i_dev_id )
 632 {
 633     OSStatus                    err = noErr;
 634     UInt32                      i_param_size;
 635     AudioStreamBasicDescription *p_format_list;
 636     int                         i, i_formats;
 637     struct aout_sys_t           *p_sys = p_aout->output.p_sys;
 638
 639     p_sys->b_supports_digital = VLC_FALSE;
 640
 641     err = AudioDeviceGetPropertyInfo( i_dev_id, 0, FALSE,
 642                                       kAudioDevicePropertyStreamFormats,
 643                                       &i_param_size, NULL );
 644     if( err != noErr )
 645     {
 646         msg_Err( p_aout, "could not get number of streamsformats: [%4.4s]", (char *)&err );
 647         return( VLC_EGENERIC );
 648     }
 649
 650     i_formats = i_param_size / sizeof( AudioStreamBasicDescription );
 651     p_format_list = (AudioStreamBasicDescription *)malloc( i_param_size );
 652     if( p_format_list == NULL )
 653     {
 654         return( VLC_ENOMEM );
 655     }
 656
 657     err = AudioDeviceGetProperty( i_dev_id, 0, FALSE,
 658                                       kAudioDevicePropertyStreamFormats,
 659                                       &i_param_size, (void *)p_format_list );
 660     if( err != noErr )
 661     {
 662         msg_Err( p_aout, "could not get the list of formats: [%4.4s]", (char *)&err );
 663         return( VLC_EGENERIC );
 664     }
 665
 666     for( i = 0; i < i_formats; i++ )
 667     {
 668         msg_Dbg( p_aout, STREAM_FORMAT_MSG( "supported format", p_format_list[i] ) );
 669
 670         if( p_format_list[i].mFormatID == 'IAC3' ||
 671                   p_format_list[i].mFormatID == kAudioFormat60958AC3 )
 672         {
 673             p_sys->b_supports_digital = VLC_TRUE;
 674             msg_Dbg( p_aout, "this device supports a digital stream" );
 675             break;
 676         }
 677     }
 678
 679     free( (void *)p_format_list );
 680     return VLC_SUCCESS;
 681 }
 682
 683 /*****************************************************************************
 684  * RenderCallbackAnalog: This function is called everytime the AudioUnit wants
 685  * us to provide some more audio data.
 686  * Don't print anything during normal playback, calling blocking function from
 687  * this callback is not allowed.
 688  *****************************************************************************/
 689 static OSStatus RenderCallbackAnalog( vlc_object_t *_p_aout,
 690                                       AudioUnitRenderActionFlags *ioActionFlags,
 691                                       const AudioTimeStamp *inTimeStamp,
 692                                       unsigned int inBusNummer,
 693                                       unsigned int inNumberFrames,
 694                                       AudioBufferList *ioData )
 695 {
 696     AudioTimeStamp  host_time;
 697     mtime_t         current_date = 0;
 698     uint32_t        i_mData_bytes = 0;
 699
 700     aout_instance_t * p_aout = (aout_instance_t *)_p_aout;
 701     struct aout_sys_t * p_sys = p_aout->output.p_sys;
 702
 703     host_time.mFlags = kAudioTimeStampHostTimeValid;
 704     AudioDeviceTranslateTime( p_sys->i_selected_dev, inTimeStamp, &host_time );
 705
 706     p_sys->clock_diff = - (mtime_t)
 707         AudioConvertHostTimeToNanos( AudioGetCurrentHostTime() ) / 1000;
 708     p_sys->clock_diff += mdate();
 709
 710     current_date = p_sys->clock_diff +
 711                    AudioConvertHostTimeToNanos( host_time.mHostTime ) / 1000;
 712
 713     if( ioData == NULL && ioData->mNumberBuffers < 1 )
 714     {
 715         msg_Err( p_aout, "no iodata or buffers");
 716         return 0;
 717     }
 718     if( ioData->mNumberBuffers > 1 )
 719         msg_Err( p_aout, "well this is weird. seems like there is more than one buffer..." );
 720
 721
 722     if( p_sys->i_total_bytes > 0 )
 723     {
 724         i_mData_bytes = __MIN( p_sys->i_total_bytes - p_sys->i_read_bytes, ioData->mBuffers[0].mDataByteSize );
 725         p_aout->p_vlc->pf_memcpy( ioData->mBuffers[0].mData, &p_sys->p_remainder_buffer[p_sys->i_read_bytes], i_mData_bytes );
 726         p_sys->i_read_bytes += i_mData_bytes;
 727         current_date += (mtime_t) ( (mtime_t) 1000000 / p_aout->output.output.i_rate ) *
 728                         ( i_mData_bytes / 4 / aout_FormatNbChannels( &p_aout->output.output )  ); // 4 is fl32 specific
 729
 730         if( p_sys->i_read_bytes >= p_sys->i_total_bytes )
 731             p_sys->i_read_bytes = p_sys->i_total_bytes = 0;
 732     }
 733
 734     while( i_mData_bytes < ioData->mBuffers[0].mDataByteSize )
 735     {
 736         /* We don't have enough data yet */
 737         aout_buffer_t * p_buffer;
 738         p_buffer = aout_OutputNextBuffer( p_aout, current_date , VLC_FALSE );
 739
 740         if( p_buffer != NULL )
 741         {
 742             uint32_t i_second_mData_bytes = __MIN( p_buffer->i_nb_bytes, ioData->mBuffers[0].mDataByteSize - i_mData_bytes );
 743
 744             p_aout->p_vlc->pf_memcpy( (uint8_t *)ioData->mBuffers[0].mData + i_mData_bytes, p_buffer->p_buffer, i_second_mData_bytes );
 745             i_mData_bytes += i_second_mData_bytes;
 746
 747             if( i_mData_bytes >= ioData->mBuffers[0].mDataByteSize )
 748             {
 749                 p_sys->i_total_bytes = p_buffer->i_nb_bytes - i_second_mData_bytes;
 750                 p_aout->p_vlc->pf_memcpy( p_sys->p_remainder_buffer, &p_buffer->p_buffer[i_second_mData_bytes], p_sys->i_total_bytes );
 751             }
 752             else
 753             {
 754                 // update current_date
 755                 current_date += (mtime_t) ( (mtime_t) 1000000 / p_aout->output.output.i_rate ) *
 756                                 ( i_second_mData_bytes / 4 / aout_FormatNbChannels( &p_aout->output.output )  ); // 4 is fl32 specific
 757             }
 758             aout_BufferFree( p_buffer );
 759         }
 760         else
 761         {
 762              p_aout->p_vlc->pf_memset( (uint8_t *)ioData->mBuffers[0].mData +i_mData_bytes, 0, ioData->mBuffers[0].mDataByteSize - i_mData_bytes );
 763              i_mData_bytes += ioData->mBuffers[0].mDataByteSize - i_mData_bytes;
 764         }
 765     }
 766     return( noErr );
 767 }
 768
 769
 770 /*****************************************************************************
 771  * Setup a digital stream
 772  *****************************************************************************/
 773 static int DigitalInit( aout_instance_t * p_aout )
 774 {
 775     OSStatus            err = noErr;
 776     UInt32              i, i_param_size;
 777     AudioDeviceID       devid_def;
 778     AudioDeviceID       *p_devices = NULL;
 779     vlc_value_t         val, text;
 780
 781     struct aout_sys_t   *p_sys = p_aout->output.p_sys;
 782
 783
 784
 785     return (VLC_SUCCESS);
 786
 787 error:
 788     return VLC_EGENERIC;
 789 }
 790
 791 int AudioDeviceHasOutput( AudioDeviceID i_dev_id )
 792 {
 793     UInt32                      dataSize;
 794     Boolean                     isWritable;
 795
 796     verify_noerr( AudioDeviceGetPropertyInfo( i_dev_id, 0, FALSE, kAudioDevicePropertyStreams, &dataSize, &isWritable) );
 797     if (dataSize == 0) return FALSE;
 798
 799     return TRUE;
 800 }
 801
 802
 803 /*****************************************************************************
 804  * HardwareListener: Warns us of changes in the list of registered devices
 805  *****************************************************************************/
 806 static OSStatus HardwareListener( AudioHardwarePropertyID inPropertyID,
 807                                   void * inClientData )
 808 {
 809     OSStatus err = noErr;
 810
 811     aout_instance_t     *p_aout = (aout_instance_t *)inClientData;
 812     /* struct aout_sys_t   *p_sys = p_aout->output.p_sys; */
 813
 814     switch( inPropertyID )
 815     {
 816         case kAudioHardwarePropertyDevices:
 817         {
 818             /* something changed in the list of devices */
 819             /* We trigger the audio-device's aout_ChannelsRestart callback */
 820             var_Change( p_aout, "audio-device", VLC_VAR_TRIGGER_CALLBACKS, NULL, NULL );
 821         }
 822         break;
 823     }
 824
 825     return( err );
 826 }