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