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

   1 /*****************************************************************************
   2  * auhal.c: AUHAL and Coreaudio output plugin
   3  *****************************************************************************
   4  * Copyright (C) 2005, 2011 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Derk-Jan Hartman <hartman at videolan dot org>
   8  *          Felix Paul Kühne <fkuehne at videolan dot org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24
  25 /*****************************************************************************
  26  * Preamble
  27  *****************************************************************************/
  28 #ifdef HAVE_CONFIG_H
  29 # include "config.h"
  30 #endif
  31
  32 #include <unistd.h>
  33
  34 #include <vlc_common.h>
  35 #include <vlc_plugin.h>
  36 #include <vlc_dialog.h>
  37 #include <vlc_aout.h>
  38
  39 #include <CoreAudio/CoreAudio.h>
  40 #include <AudioUnit/AudioUnit.h>
  41 #include <AudioToolbox/AudioFormat.h>
  42 #include <AudioUnit/AudioComponent.h>
  43
  44 #include <CoreServices/CoreServices.h>
  45
  46 #ifndef verify_noerr
  47 #define verify_noerr(a) assert((a) == noErr)
  48 #endif
  49
  50 #define STREAM_FORMAT_MSG( pre, sfm ) \
  51     pre "[%u][%4.4s][%u][%u][%u][%u][%u][%u]", \
  52     (UInt32)sfm.mSampleRate, (char *)&sfm.mFormatID, \
  53     sfm.mFormatFlags, sfm.mBytesPerPacket, \
  54     sfm.mFramesPerPacket, sfm.mBytesPerFrame, \
  55     sfm.mChannelsPerFrame, sfm.mBitsPerChannel
  56
  57 #define STREAM_FORMAT_MSG_FULL( pre, sfm ) \
  58     pre ":\nsamplerate: [%u]\nFormatID: [%4.4s]\nFormatFlags: [%u]\nBypesPerPacket: [%u]\nFramesPerPacket: [%u]\nBytesPerFrame: [%u]\nChannelsPerFrame: [%u]\nBitsPerChannel[%u]", \
  59     (UInt32)sfm.mSampleRate, (char *)&sfm.mFormatID, \
  60     sfm.mFormatFlags, sfm.mBytesPerPacket, \
  61     sfm.mFramesPerPacket, sfm.mBytesPerFrame, \
  62     sfm.mChannelsPerFrame, sfm.mBitsPerChannel
  63
  64 #define FRAMESIZE 2048
  65 #define BUFSIZE (FRAMESIZE * 8) * 8
  66 #define AOUT_VAR_SPDIF_FLAG 0xf00000
  67
  68 /*
  69  * TODO:
  70  * - clean up the debug info
  71  * - be better at changing stream setup or devices setup changes while playing.
  72  * - fix 6.1 and 7.1
  73  */
  74
  75 /*****************************************************************************
  76  * aout_sys_t: private audio output method descriptor
  77  *****************************************************************************
  78  * This structure is part of the audio output thread descriptor.
  79  * It describes the CoreAudio specific properties of an output thread.
  80  *****************************************************************************/
  81 struct aout_sys_t
  82 {
  83     AudioDeviceID               i_default_dev;  /* Keeps DeviceID of defaultOutputDevice */
  84     AudioDeviceID               i_selected_dev; /* Keeps DeviceID of the selected device */
  85     AudioDeviceIOProcID         i_procID;       /* DeviceID of current device */
  86     UInt32                      i_devices;      /* Number of CoreAudio Devices */
  87     bool                        b_supports_digital;/* Does the currently selected device support digital mode? */
  88     bool                        b_digital;      /* Are we running in digital mode? */
  89     mtime_t                     clock_diff;     /* Difference between VLC clock and Device clock */
  90
  91     /* AUHAL specific */
  92     Component                   au_component;   /* The Audiocomponent we use */
  93     AudioUnit                   au_unit;        /* The AudioUnit we use */
  94     uint8_t                     p_remainder_buffer[BUFSIZE];
  95     uint32_t                    i_read_bytes;
  96     uint32_t                    i_total_bytes;
  97
  98     /* CoreAudio SPDIF mode specific */
  99     pid_t                       i_hog_pid;      /* The keep the pid of our hog status */
 100     AudioStreamID               i_stream_id;    /* The StreamID that has a cac3 streamformat */
 101     int                         i_stream_index; /* The index of i_stream_id in an AudioBufferList */
 102     AudioStreamBasicDescription stream_format;  /* The format we changed the stream to */
 103     AudioStreamBasicDescription sfmt_revert;    /* The original format of the stream */
 104     bool                        b_revert;       /* Wether we need to revert the stream format */
 105     bool                        b_changed_mixing;/* Wether we need to set the mixing mode back */
 106 };
 107
 108 /*****************************************************************************
 109  * Local prototypes.
 110  *****************************************************************************/
 111 static int      Open                    ( vlc_object_t * );
 112 static int      OpenAnalog              ( aout_instance_t * );
 113 static int      OpenSPDIF               ( aout_instance_t * );
 114 static void     Close                   ( vlc_object_t * );
 115
 116 static void     Play                    ( aout_instance_t * );
 117 static void     Probe                   ( aout_instance_t * );
 118
 119 static int      AudioDeviceHasOutput    ( AudioDeviceID );
 120 static int      AudioDeviceSupportsDigital( aout_instance_t *, AudioDeviceID );
 121 static int      AudioStreamSupportsDigital( aout_instance_t *, AudioStreamID );
 122 static int      AudioStreamChangeFormat ( aout_instance_t *, AudioStreamID, AudioStreamBasicDescription );
 123
 124 static OSStatus RenderCallbackAnalog    ( vlc_object_t *, AudioUnitRenderActionFlags *, const AudioTimeStamp *,
 125                                           unsigned int, unsigned int, AudioBufferList *);
 126 static OSStatus RenderCallbackSPDIF     ( AudioDeviceID, const AudioTimeStamp *, const void *, const AudioTimeStamp *,
 127                                           AudioBufferList *, const AudioTimeStamp *, void * );
 128 static OSStatus HardwareListener        ( AudioHardwarePropertyID, void *);
 129 static OSStatus StreamListener          ( AudioStreamID, UInt32,
 130                                           AudioDevicePropertyID, void * );
 131 static int      AudioDeviceCallback     ( vlc_object_t *, const char *,
 132                                           vlc_value_t, vlc_value_t, void * );
 133
 134
 135
 136 /*****************************************************************************
 137  * Module descriptor
 138  *****************************************************************************/
 139 #define ADEV_TEXT N_("Audio Device")
 140 #define ADEV_LONGTEXT N_("Choose a number corresponding to the number of an " \
 141     "audio device, as listed in your 'Audio Device' menu. This device will " \
 142     "then be used by default for audio playback.")
 143
 144 vlc_module_begin ()
 145     set_shortname( "auhal" )
 146     set_description( N_("HAL AudioUnit output") )
 147     set_capability( "audio output", 101 )
 148     set_category( CAT_AUDIO )
 149     set_subcategory( SUBCAT_AUDIO_AOUT )
 150     set_callbacks( Open, Close )
 151     add_integer( "macosx-audio-device", 0, ADEV_TEXT, ADEV_LONGTEXT, false )
 152 vlc_module_end ()
 153
 154 /*****************************************************************************
 155  * Open: open macosx audio output
 156  *****************************************************************************/
 157 static int Open( vlc_object_t * p_this )
 158 {
 159     OSStatus                err = noErr;
 160     UInt32                  i_param_size = 0;
 161     struct aout_sys_t       *p_sys = NULL;
 162     vlc_value_t             val;
 163     aout_instance_t         *p_aout = (aout_instance_t *)p_this;
 164
 165     /* Use int here, to match kAudioDevicePropertyDeviceIsAlive
 166      * property size */
 167     int                     b_alive = false;
 168
 169     /* Allocate structure */
 170     p_aout->output.p_sys = malloc( sizeof( aout_sys_t ) );
 171     if( p_aout->output.p_sys == NULL )
 172         return VLC_ENOMEM;
 173
 174     p_sys = p_aout->output.p_sys;
 175     p_sys->i_default_dev = 0;
 176     p_sys->i_selected_dev = 0;
 177     p_sys->i_devices = 0;
 178     p_sys->b_supports_digital = false;
 179     p_sys->b_digital = false;
 180     p_sys->au_component = NULL;
 181     p_sys->au_unit = NULL;
 182     p_sys->clock_diff = (mtime_t) 0;
 183     p_sys->i_read_bytes = 0;
 184     p_sys->i_total_bytes = 0;
 185     p_sys->i_hog_pid = -1;
 186     p_sys->i_stream_id = 0;
 187     p_sys->i_stream_index = -1;
 188     p_sys->b_revert = false;
 189     p_sys->b_changed_mixing = false;
 190     memset( p_sys->p_remainder_buffer, 0, sizeof(uint8_t) * BUFSIZE );
 191
 192     p_aout->output.pf_play = Play;
 193
 194     aout_FormatPrint( p_aout, "VLC is looking for:", (audio_sample_format_t *)&p_aout->output.output );
 195
 196     /* Persistent device variable */
 197     if( var_Type( p_aout->p_libvlc, "macosx-audio-device" ) == 0 )
 198     {
 199         var_Create( p_aout->p_libvlc, "macosx-audio-device", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 200     }
 201
 202     /* Build a list of devices */
 203     if( var_Type( p_aout, "audio-device" ) == 0 )
 204     {
 205         Probe( p_aout );
 206     }
 207
 208     /* What device do we want? */
 209     if( var_Get( p_aout, "audio-device", &val ) < 0 )
 210     {
 211         msg_Err( p_aout, "audio-device var does not exist. device probe failed." );
 212         goto error;
 213     }
 214
 215     p_sys->i_selected_dev = val.i_int & ~AOUT_VAR_SPDIF_FLAG; /* remove SPDIF flag to get the true DeviceID */
 216     p_sys->b_supports_digital = ( val.i_int & AOUT_VAR_SPDIF_FLAG ) ? true : false;
 217
 218     /* Check if the desired device is alive and usable */
 219     /* TODO: add a callback to the device to alert us if the device dies */
 220     i_param_size = sizeof( b_alive );
 221     err = AudioDeviceGetProperty( p_sys->i_selected_dev, 0, FALSE,
 222                                   kAudioDevicePropertyDeviceIsAlive,
 223                                   &i_param_size, &b_alive );
 224
 225     if( err != noErr )
 226     {
 227         /* Be tolerant, only give a warning here */
 228         msg_Warn( p_aout, "could not check whether device [0x%x] is alive: %4.4s", (unsigned int)p_sys->i_selected_dev, (char *)&err );
 229         b_alive = false;
 230     }
 231
 232     if( !b_alive )
 233     {
 234         msg_Warn( p_aout, "selected audio device is not alive, switching to default device" );
 235         p_sys->i_selected_dev = p_sys->i_default_dev;
 236     }
 237
 238     i_param_size = sizeof( p_sys->i_hog_pid );
 239     err = AudioDeviceGetProperty( p_sys->i_selected_dev, 0, FALSE,
 240                                   kAudioDevicePropertyHogMode,
 241                                   &i_param_size, &p_sys->i_hog_pid );
 242
 243     if( err != noErr )
 244     {
 245         /* This is not a fatal error. Some drivers simply don't support this property */
 246         msg_Warn( p_aout, "could not check whether device is hogged: %4.4s",
 247                  (char *)&err );
 248         p_sys->i_hog_pid = -1;
 249     }
 250
 251     if( p_sys->i_hog_pid != -1 && p_sys->i_hog_pid != getpid() )
 252     {
 253         msg_Err( p_aout, "Selected audio device is exclusively in use by another program." );
 254         dialog_Fatal( p_aout, _("Audio output failed"), "%s",
 255                         _("The selected audio output device is exclusively in "
 256                           "use by another program.") );
 257         goto error;
 258     }
 259
 260     /* Check for Digital mode or Analog output mode */
 261     if( AOUT_FMT_NON_LINEAR( &p_aout->output.output ) && p_sys->b_supports_digital )
 262     {
 263         if( OpenSPDIF( p_aout ) )
 264             return VLC_SUCCESS;
 265     }
 266     else
 267     {
 268         if( OpenAnalog( p_aout ) )
 269             return VLC_SUCCESS;
 270     }
 271
 272 error:
 273     /* If we reach this, this aout has failed */
 274     var_Destroy( p_aout, "audio-device" );
 275     free( p_sys );
 276     return VLC_EGENERIC;
 277 }
 278
 279 /*****************************************************************************
 280  * Open: open and setup a HAL AudioUnit to do analog (multichannel) audio output
 281  *****************************************************************************/
 282 static int OpenAnalog( aout_instance_t *p_aout )
 283 {
 284     struct aout_sys_t           *p_sys = p_aout->output.p_sys;
 285     OSStatus                    err = noErr;
 286     UInt32                      i_param_size = 0, i = 0;
 287     int                         i_original;
 288     ComponentDescription        desc;
 289     AudioStreamBasicDescription DeviceFormat;
 290     AudioChannelLayout          *layout;
 291     AudioChannelLayout          new_layout;
 292     AURenderCallbackStruct      input;
 293
 294     /* Lets go find our Component */
 295     desc.componentType = kAudioUnitType_Output;
 296     desc.componentSubType = kAudioUnitSubType_HALOutput;
 297     desc.componentManufacturer = kAudioUnitManufacturer_Apple;
 298     desc.componentFlags = 0;
 299     desc.componentFlagsMask = 0;
 300
 301     p_sys->au_component = FindNextComponent( NULL, &desc );
 302     if( p_sys->au_component == NULL )
 303     {
 304         msg_Warn( p_aout, "we cannot find our HAL component" );
 305         return false;
 306     }
 307
 308     err = OpenAComponent( p_sys->au_component, &p_sys->au_unit );
 309     if( err != noErr )
 310     {
 311         msg_Warn( p_aout, "we cannot open our HAL component" );
 312         return false;
 313     }
 314
 315     /* Set the device we will use for this output unit */
 316     err = AudioUnitSetProperty( p_sys->au_unit,
 317                          kAudioOutputUnitProperty_CurrentDevice,
 318                          kAudioUnitScope_Global,
 319                          0,
 320                          &p_sys->i_selected_dev,
 321                          sizeof( AudioDeviceID ));
 322
 323     if( err != noErr )
 324     {
 325         msg_Warn( p_aout, "we cannot select the audio device" );
 326         return false;
 327     }
 328
 329     /* Get the current format */
 330     i_param_size = sizeof(AudioStreamBasicDescription);
 331
 332     err = AudioUnitGetProperty( p_sys->au_unit,
 333                                    kAudioUnitProperty_StreamFormat,
 334                                    kAudioUnitScope_Input,
 335                                    0,
 336                                    &DeviceFormat,
 337                                    &i_param_size );
 338
 339     if( err != noErr ) return false;
 340     else msg_Dbg( p_aout, STREAM_FORMAT_MSG( "current format is: ", DeviceFormat ) );
 341
 342     /* Get the channel layout of the device side of the unit (vlc -> unit -> device) */
 343     err = AudioUnitGetPropertyInfo( p_sys->au_unit,
 344                                    kAudioDevicePropertyPreferredChannelLayout,
 345                                    kAudioUnitScope_Output,
 346                                    0,
 347                                    &i_param_size,
 348                                    NULL );
 349
 350     if( err == noErr )
 351     {
 352         layout = (AudioChannelLayout *)malloc( i_param_size);
 353
 354         verify_noerr( AudioUnitGetProperty( p_sys->au_unit,
 355                                        kAudioDevicePropertyPreferredChannelLayout,
 356                                        kAudioUnitScope_Output,
 357                                        0,
 358                                        layout,
 359                                        &i_param_size ));
 360
 361         /* We need to "fill out" the ChannelLayout, because there are multiple ways that it can be set */
 362         if( layout->mChannelLayoutTag == kAudioChannelLayoutTag_UseChannelBitmap)
 363         {
 364             /* bitmap defined channellayout */
 365             verify_noerr( AudioFormatGetProperty( kAudioFormatProperty_ChannelLayoutForBitmap,
 366                                     sizeof( UInt32), &layout->mChannelBitmap,
 367                                     &i_param_size,
 368                                     layout ));
 369         }
 370         else if( layout->mChannelLayoutTag != kAudioChannelLayoutTag_UseChannelDescriptions )
 371         {
 372             /* layouttags defined channellayout */
 373             verify_noerr( AudioFormatGetProperty( kAudioFormatProperty_ChannelLayoutForTag,
 374                                     sizeof( AudioChannelLayoutTag ), &layout->mChannelLayoutTag,
 375                                     &i_param_size,
 376                                     layout ));
 377         }
 378
 379         msg_Dbg( p_aout, "layout of AUHAL has %d channels" , (int)layout->mNumberChannelDescriptions );
 380
 381         /* Initialize the VLC core channel count */
 382         p_aout->output.output.i_physical_channels = 0;
 383         i_original = p_aout->output.output.i_original_channels & AOUT_CHAN_PHYSMASK;
 384
 385         if( i_original == AOUT_CHAN_CENTER || layout->mNumberChannelDescriptions < 2 )
 386         {
 387             /* We only need Mono or cannot output more than 1 channel */
 388             p_aout->output.output.i_physical_channels = AOUT_CHAN_CENTER;
 389         }
 390         else if( i_original == (AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT) || layout->mNumberChannelDescriptions < 3 )
 391         {
 392             /* We only need Stereo or cannot output more than 2 channels */
 393             p_aout->output.output.i_physical_channels = AOUT_CHAN_RIGHT | AOUT_CHAN_LEFT;
 394         }
 395         else
 396         {
 397             /* We want more than stereo and we can do that */
 398             for( i = 0; i < layout->mNumberChannelDescriptions; i++ )
 399             {
 400                 msg_Dbg( p_aout, "this is channel: %d", (int)layout->mChannelDescriptions[i].mChannelLabel );
 401
 402                 switch( layout->mChannelDescriptions[i].mChannelLabel )
 403                 {
 404                     case kAudioChannelLabel_Left:
 405                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_LEFT;
 406                         continue;
 407                     case kAudioChannelLabel_Right:
 408                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_RIGHT;
 409                         continue;
 410                     case kAudioChannelLabel_Center:
 411                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_CENTER;
 412                         continue;
 413                     case kAudioChannelLabel_LFEScreen:
 414                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_LFE;
 415                         continue;
 416                     case kAudioChannelLabel_LeftSurround:
 417                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_REARLEFT;
 418                         continue;
 419                     case kAudioChannelLabel_RightSurround:
 420                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_REARRIGHT;
 421                         continue;
 422                     case kAudioChannelLabel_RearSurroundLeft:
 423                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_MIDDLELEFT;
 424                         continue;
 425                     case kAudioChannelLabel_RearSurroundRight:
 426                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_MIDDLERIGHT;
 427                         continue;
 428                     case kAudioChannelLabel_CenterSurround:
 429                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_REARCENTER;
 430                         continue;
 431                     default:
 432                         msg_Warn( p_aout, "unrecognized channel form provided by driver: %d", (int)layout->mChannelDescriptions[i].mChannelLabel );
 433                 }
 434             }
 435             if( p_aout->output.output.i_physical_channels == 0 )
 436             {
 437                 p_aout->output.output.i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
 438                 msg_Err( p_aout, "You should configure your speaker layout with Audio Midi Setup Utility in /Applications/Utilities. Now using Stereo mode." );
 439                 dialog_Fatal( p_aout, _("Audio device is not configured"), "%s",
 440                                 _("You should configure your speaker layout with "
 441                                   "the \"Audio Midi Setup\" utility in /Applications/"
 442                                   "Utilities. Stereo mode is being used now.") );
 443             }
 444         }
 445         free( layout );
 446     }
 447     else
 448     {
 449         msg_Warn( p_aout, "this driver does not support kAudioDevicePropertyPreferredChannelLayout. BAD DRIVER AUTHOR !!!" );
 450         p_aout->output.output.i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
 451     }
 452
 453     msg_Dbg( p_aout, "selected %d physical channels for device output", aout_FormatNbChannels( &p_aout->output.output ) );
 454     msg_Dbg( p_aout, "VLC will output: %s", aout_FormatPrintChannels( &p_aout->output.output ));
 455
 456     memset (&new_layout, 0, sizeof(new_layout));
 457     switch( aout_FormatNbChannels( &p_aout->output.output ) )
 458     {
 459         case 1:
 460             new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_Mono;
 461             break;
 462         case 2:
 463             new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_Stereo;
 464             break;
 465         case 3:
 466             if( p_aout->output.output.i_physical_channels & AOUT_CHAN_CENTER )
 467             {
 468                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_7; // L R C
 469             }
 470             else if( p_aout->output.output.i_physical_channels & AOUT_CHAN_LFE )
 471             {
 472                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_4; // L R LFE
 473             }
 474             break;
 475         case 4:
 476             if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_CENTER | AOUT_CHAN_LFE ) )
 477             {
 478                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_10; // L R C LFE
 479             }
 480             else if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT ) )
 481             {
 482                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_3; // L R Ls Rs
 483             }
 484             else if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_CENTER | AOUT_CHAN_REARCENTER ) )
 485             {
 486                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_3; // L R C Cs
 487             }
 488             break;
 489         case 5:
 490             if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_CENTER ) )
 491             {
 492                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_19; // L R Ls Rs C
 493             }
 494             else if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_LFE ) )
 495             {
 496                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_18; // L R Ls Rs LFE
 497             }
 498             break;
 499         case 6:
 500             if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_LFE ) )
 501             {
 502                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_20; // L R Ls Rs C LFE
 503             }
 504             else
 505             {
 506                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_AudioUnit_6_0; // L R Ls Rs C Cs
 507             }
 508             break;
 509         case 7:
 510             /* FIXME: This is incorrect. VLC uses the internal ordering: L R Lm Rm Lr Rr C LFE but this is wrong */
 511             new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_MPEG_6_1_A; // L R C LFE Ls Rs Cs
 512             break;
 513         case 8:
 514             /* FIXME: This is incorrect. VLC uses the internal ordering: L R Lm Rm Lr Rr C LFE but this is wrong */
 515             new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_MPEG_7_1_A; // L R C LFE Ls Rs Lc Rc
 516             break;
 517     }
 518
 519     /* Set up the format to be used */
 520     DeviceFormat.mSampleRate = p_aout->output.output.i_rate;
 521     DeviceFormat.mFormatID = kAudioFormatLinearPCM;
 522
 523     /* We use float 32. It's the best supported format by both VLC and Coreaudio */
 524     p_aout->output.output.i_format = VLC_CODEC_FL32;
 525     DeviceFormat.mFormatFlags = kAudioFormatFlagsNativeFloatPacked;
 526     DeviceFormat.mBitsPerChannel = 32;
 527     DeviceFormat.mChannelsPerFrame = aout_FormatNbChannels( &p_aout->output.output );
 528
 529     /* Calculate framesizes and stuff */
 530     DeviceFormat.mFramesPerPacket = 1;
 531     DeviceFormat.mBytesPerFrame = DeviceFormat.mBitsPerChannel * DeviceFormat.mChannelsPerFrame / 8;
 532     DeviceFormat.mBytesPerPacket = DeviceFormat.mBytesPerFrame * DeviceFormat.mFramesPerPacket;
 533
 534     /* Set the desired format */
 535     i_param_size = sizeof(AudioStreamBasicDescription);
 536     verify_noerr( AudioUnitSetProperty( p_sys->au_unit,
 537                                    kAudioUnitProperty_StreamFormat,
 538                                    kAudioUnitScope_Input,
 539                                    0,
 540                                    &DeviceFormat,
 541                                    i_param_size ));
 542
 543     msg_Dbg( p_aout, STREAM_FORMAT_MSG( "we set the AU format: " , DeviceFormat ) );
 544
 545     /* Retrieve actual format */
 546     verify_noerr( AudioUnitGetProperty( p_sys->au_unit,
 547                                    kAudioUnitProperty_StreamFormat,
 548                                    kAudioUnitScope_Input,
 549                                    0,
 550                                    &DeviceFormat,
 551                                    &i_param_size ));
 552
 553     msg_Dbg( p_aout, STREAM_FORMAT_MSG( "the actual set AU format is " , DeviceFormat ) );
 554
 555     /* Do the last VLC aout setups */
 556     aout_FormatPrepare( &p_aout->output.output );
 557     p_aout->output.i_nb_samples = FRAMESIZE;
 558     aout_VolumeSoftInit( p_aout );
 559
 560     /* set the IOproc callback */
 561     input.inputProc = (AURenderCallback) RenderCallbackAnalog;
 562     input.inputProcRefCon = p_aout;
 563
 564     verify_noerr( AudioUnitSetProperty( p_sys->au_unit,
 565                             kAudioUnitProperty_SetRenderCallback,
 566                             kAudioUnitScope_Input,
 567                             0, &input, sizeof( input ) ) );
 568
 569     input.inputProc = (AURenderCallback) RenderCallbackAnalog;
 570     input.inputProcRefCon = p_aout;
 571
 572     /* Set the new_layout as the layout VLC will use to feed the AU unit */
 573     verify_noerr( AudioUnitSetProperty( p_sys->au_unit,
 574                             kAudioUnitProperty_AudioChannelLayout,
 575                             kAudioUnitScope_Input,
 576                             0, &new_layout, sizeof(new_layout) ) );
 577
 578     if( new_layout.mNumberChannelDescriptions > 0 )
 579         free( new_layout.mChannelDescriptions );
 580
 581     /* AU initiliaze */
 582     verify_noerr( AudioUnitInitialize(p_sys->au_unit) );
 583
 584     /* Find the difference between device clock and mdate clock */
 585     p_sys->clock_diff = - (mtime_t)
 586         AudioConvertHostTimeToNanos( AudioGetCurrentHostTime() ) / 1000;
 587     p_sys->clock_diff += mdate();
 588
 589     /* Start the AU */
 590     verify_noerr( AudioOutputUnitStart(p_sys->au_unit) );
 591
 592     return true;
 593 }
 594
 595 /*****************************************************************************
 596  * Setup a encoded digital stream (SPDIF)
 597  *****************************************************************************/
 598 static int OpenSPDIF( aout_instance_t * p_aout )
 599 {
 600     struct aout_sys_t       *p_sys = p_aout->output.p_sys;
 601     OSStatus                err = noErr;
 602     UInt32                  i_param_size = 0, b_mix = 0;
 603     Boolean                 b_writeable = false;
 604     AudioStreamID           *p_streams = NULL;
 605     int                     i = 0, i_streams = 0;
 606
 607     /* Start doing the SPDIF setup proces */
 608     p_sys->b_digital = true;
 609
 610     /* Hog the device */
 611     i_param_size = sizeof( p_sys->i_hog_pid );
 612     p_sys->i_hog_pid = getpid() ;
 613
 614     err = AudioDeviceSetProperty( p_sys->i_selected_dev, 0, 0, FALSE,
 615                                   kAudioDevicePropertyHogMode, i_param_size, &p_sys->i_hog_pid );
 616
 617     if( err != noErr )
 618     {
 619         msg_Err( p_aout, "failed to set hogmode: [%4.4s]", (char *)&err );
 620         return false;
 621     }
 622
 623     /* Set mixable to false if we are allowed to */
 624     err = AudioDeviceGetPropertyInfo( p_sys->i_selected_dev, 0, FALSE, kAudioDevicePropertySupportsMixing,
 625                                     &i_param_size, &b_writeable );
 626
 627     err = AudioDeviceGetProperty( p_sys->i_selected_dev, 0, FALSE, kAudioDevicePropertySupportsMixing,
 628                                     &i_param_size, &b_mix );
 629
 630     if( !err && b_writeable )
 631     {
 632         b_mix = 0;
 633         err = AudioDeviceSetProperty( p_sys->i_selected_dev, 0, 0, FALSE,
 634                             kAudioDevicePropertySupportsMixing, i_param_size, &b_mix );
 635         p_sys->b_changed_mixing = true;
 636     }
 637
 638     if( err != noErr )
 639     {
 640         msg_Err( p_aout, "failed to set mixmode: [%4.4s]", (char *)&err );
 641         return false;
 642     }
 643
 644     /* Get a list of all the streams on this device */
 645     err = AudioDeviceGetPropertyInfo( p_sys->i_selected_dev, 0, FALSE,
 646                                       kAudioDevicePropertyStreams,
 647                                       &i_param_size, NULL );
 648     if( err != noErr )
 649     {
 650         msg_Err( p_aout, "could not get number of streams: [%4.4s]", (char *)&err );
 651         return false;
 652     }
 653
 654     i_streams = i_param_size / sizeof( AudioStreamID );
 655     p_streams = (AudioStreamID *)malloc( i_param_size );
 656     if( p_streams == NULL )
 657         return false;
 658
 659     err = AudioDeviceGetProperty( p_sys->i_selected_dev, 0, FALSE,
 660                                     kAudioDevicePropertyStreams,
 661                                     &i_param_size, p_streams );
 662
 663     if( err != noErr )
 664     {
 665         msg_Err( p_aout, "could not get number of streams: [%4.4s]", (char *)&err );
 666         free( p_streams );
 667         return false;
 668     }
 669
 670     for( i = 0; i < i_streams && p_sys->i_stream_index < 0 ; i++ )
 671     {
 672         /* Find a stream with a cac3 stream */
 673         AudioStreamBasicDescription *p_format_list = NULL;
 674         int                         i_formats = 0, j = 0;
 675         bool                  b_digital = false;
 676
 677         /* Retrieve all the stream formats supported by each output stream */
 678         err = AudioStreamGetPropertyInfo( p_streams[i], 0,
 679                                           kAudioStreamPropertyPhysicalFormats,
 680                                           &i_param_size, NULL );
 681         if( err != noErr )
 682         {
 683             msg_Err( p_aout, "could not get number of streamformats: [%4.4s]", (char *)&err );
 684             continue;
 685         }
 686
 687         i_formats = i_param_size / sizeof( AudioStreamBasicDescription );
 688         p_format_list = (AudioStreamBasicDescription *)malloc( i_param_size );
 689         if( p_format_list == NULL )
 690             continue;
 691
 692         err = AudioStreamGetProperty( p_streams[i], 0,
 693                                           kAudioStreamPropertyPhysicalFormats,
 694                                           &i_param_size, p_format_list );
 695         if( err != noErr )
 696         {
 697             msg_Err( p_aout, "could not get the list of streamformats: [%4.4s]", (char *)&err );
 698             free( p_format_list );
 699             continue;
 700         }
 701
 702         /* Check if one of the supported formats is a digital format */
 703         for( j = 0; j < i_formats; j++ )
 704         {
 705             if( p_format_list[j].mFormatID == 'IAC3' ||
 706                   p_format_list[j].mFormatID == kAudioFormat60958AC3 )
 707             {
 708                 b_digital = true;
 709                 break;
 710             }
 711         }
 712
 713         if( b_digital )
 714         {
 715             /* if this stream supports a digital (cac3) format, then go set it. */
 716             int i_requested_rate_format = -1;
 717             int i_current_rate_format = -1;
 718             int i_backup_rate_format = -1;
 719
 720             p_sys->i_stream_id = p_streams[i];
 721             p_sys->i_stream_index = i;
 722
 723             if( !p_sys->b_revert )
 724             {
 725                 /* Retrieve the original format of this stream first if not done so already */
 726                 i_param_size = sizeof( p_sys->sfmt_revert );
 727                 err = AudioStreamGetProperty( p_sys->i_stream_id, 0,
 728                                               kAudioStreamPropertyPhysicalFormat,
 729                                               &i_param_size,
 730                                               &p_sys->sfmt_revert );
 731                 if( err != noErr )
 732                 {
 733                     msg_Err( p_aout, "could not retrieve the original streamformat: [%4.4s]", (char *)&err );
 734                     continue;
 735                 }
 736                 p_sys->b_revert = true;
 737             }
 738
 739             for( j = 0; j < i_formats; j++ )
 740             {
 741                 if( p_format_list[j].mFormatID == 'IAC3' ||
 742                       p_format_list[j].mFormatID == kAudioFormat60958AC3 )
 743                 {
 744                     if( p_format_list[j].mSampleRate == p_aout->output.output.i_rate )
 745                     {
 746                         i_requested_rate_format = j;
 747                         break;
 748                     }
 749                     else if( p_format_list[j].mSampleRate == p_sys->sfmt_revert.mSampleRate )
 750                     {
 751                         i_current_rate_format = j;
 752                     }
 753                     else
 754                     {
 755                         if( i_backup_rate_format < 0 || p_format_list[j].mSampleRate > p_format_list[i_backup_rate_format].mSampleRate )
 756                             i_backup_rate_format = j;
 757                     }
 758                 }
 759
 760             }
 761
 762             if( i_requested_rate_format >= 0 ) /* We prefer to output at the samplerate of the original audio */
 763                 p_sys->stream_format = p_format_list[i_requested_rate_format];
 764             else if( i_current_rate_format >= 0 ) /* If not possible, we will try to use the current samplerate of the device */
 765                 p_sys->stream_format = p_format_list[i_current_rate_format];
 766             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) */
 767         }
 768         free( p_format_list );
 769     }
 770     free( p_streams );
 771
 772     msg_Dbg( p_aout, STREAM_FORMAT_MSG( "original stream format: ", p_sys->sfmt_revert ) );
 773
 774     if( !AudioStreamChangeFormat( p_aout, p_sys->i_stream_id, p_sys->stream_format ) )
 775         return false;
 776
 777     /* Set the format flags */
 778     if( p_sys->stream_format.mFormatFlags & kAudioFormatFlagIsBigEndian )
 779         p_aout->output.output.i_format = VLC_CODEC_SPDIFB;
 780     else
 781         p_aout->output.output.i_format = VLC_CODEC_SPDIFL;
 782     p_aout->output.output.i_bytes_per_frame = AOUT_SPDIF_SIZE;
 783     p_aout->output.output.i_frame_length = A52_FRAME_NB;
 784     p_aout->output.i_nb_samples = p_aout->output.output.i_frame_length;
 785     p_aout->output.output.i_rate = (unsigned int)p_sys->stream_format.mSampleRate;
 786     aout_FormatPrepare( &p_aout->output.output );
 787     aout_VolumeNoneInit( p_aout );
 788
 789     /* Add IOProc callback */
 790     err = AudioDeviceCreateIOProcID( p_sys->i_selected_dev,
 791                                    (AudioDeviceIOProc)RenderCallbackSPDIF,
 792                                    (void *)p_aout,
 793                                    &p_sys->i_procID );
 794     if( err != noErr )
 795     {
 796         msg_Err( p_aout, "AudioDeviceCreateIOProcID failed: [%4.4s]", (char *)&err );
 797         return false;
 798     }
 799
 800     /* Check for the difference between the Device clock and mdate */
 801     p_sys->clock_diff = - (mtime_t)
 802         AudioConvertHostTimeToNanos( AudioGetCurrentHostTime() ) / 1000;
 803     p_sys->clock_diff += mdate();
 804
 805     /* Start device */
 806     err = AudioDeviceStart( p_sys->i_selected_dev, p_sys->i_procID );
 807     if( err != noErr )
 808     {
 809         msg_Err( p_aout, "AudioDeviceStart failed: [%4.4s]", (char *)&err );
 810
 811         err = AudioDeviceDestroyIOProcID( p_sys->i_selected_dev,
 812                                           p_sys->i_procID );
 813         if( err != noErr )
 814         {
 815             msg_Err( p_aout, "AudioDeviceDestroyIOProcID failed: [%4.4s]", (char *)&err );
 816         }
 817         return false;
 818     }
 819
 820     return true;
 821 }
 822
 823
 824 /*****************************************************************************
 825  * Close: Close HAL AudioUnit
 826  *****************************************************************************/
 827 static void Close( vlc_object_t * p_this )
 828 {
 829     aout_instance_t     *p_aout = (aout_instance_t *)p_this;
 830     struct aout_sys_t   *p_sys = p_aout->output.p_sys;
 831     OSStatus            err = noErr;
 832     UInt32              i_param_size = 0;
 833
 834     if( p_sys->au_unit )
 835     {
 836         verify_noerr( AudioOutputUnitStop( p_sys->au_unit ) );
 837         verify_noerr( AudioUnitUninitialize( p_sys->au_unit ) );
 838         verify_noerr( CloseComponent( p_sys->au_unit ) );
 839     }
 840
 841     if( p_sys->b_digital )
 842     {
 843         /* Stop device */
 844         err = AudioDeviceStop( p_sys->i_selected_dev,
 845                                p_sys->i_procID );
 846         if( err != noErr )
 847         {
 848             msg_Err( p_aout, "AudioDeviceStop failed: [%4.4s]", (char *)&err );
 849         }
 850
 851         /* Remove IOProc callback */
 852         err = AudioDeviceDestroyIOProcID( p_sys->i_selected_dev,
 853                                           p_sys->i_procID );
 854         if( err != noErr )
 855         {
 856             msg_Err( p_aout, "AudioDeviceDestroyIOProcID failed: [%4.4s]", (char *)&err );
 857         }
 858
 859         if( p_sys->b_revert )
 860         {
 861             AudioStreamChangeFormat( p_aout, p_sys->i_stream_id, p_sys->sfmt_revert );
 862         }
 863
 864         if( p_sys->b_changed_mixing && p_sys->sfmt_revert.mFormatID != kAudioFormat60958AC3 )
 865         {
 866             int b_mix;
 867             Boolean b_writeable;
 868             /* Revert mixable to true if we are allowed to */
 869             err = AudioDeviceGetPropertyInfo( p_sys->i_selected_dev, 0, FALSE, kAudioDevicePropertySupportsMixing,
 870                                         &i_param_size, &b_writeable );
 871
 872             err = AudioDeviceGetProperty( p_sys->i_selected_dev, 0, FALSE, kAudioDevicePropertySupportsMixing,
 873                                         &i_param_size, &b_mix );
 874
 875             if( !err && b_writeable )
 876             {
 877                 msg_Dbg( p_aout, "mixable is: %d", b_mix );
 878                 b_mix = 1;
 879                 err = AudioDeviceSetProperty( p_sys->i_selected_dev, 0, 0, FALSE,
 880                                     kAudioDevicePropertySupportsMixing, i_param_size, &b_mix );
 881             }
 882
 883             if( err != noErr )
 884             {
 885                 msg_Err( p_aout, "failed to set mixmode: [%4.4s]", (char *)&err );
 886             }
 887         }
 888     }
 889
 890     err = AudioHardwareRemovePropertyListener( kAudioHardwarePropertyDevices,
 891                                                HardwareListener );
 892
 893     if( err != noErr )
 894     {
 895         msg_Err( p_aout, "AudioHardwareRemovePropertyListener failed: [%4.4s]", (char *)&err );
 896     }
 897
 898     if( p_sys->i_hog_pid == getpid() )
 899     {
 900         p_sys->i_hog_pid = -1;
 901         i_param_size = sizeof( p_sys->i_hog_pid );
 902         err = AudioDeviceSetProperty( p_sys->i_selected_dev, 0, 0, FALSE,
 903                                          kAudioDevicePropertyHogMode, i_param_size, &p_sys->i_hog_pid );
 904         if( err != noErr ) msg_Err( p_aout, "Could not release hogmode: [%4.4s]", (char *)&err );
 905     }
 906
 907     free( p_sys );
 908 }
 909
 910 /*****************************************************************************
 911  * Play: nothing to do
 912  *****************************************************************************/
 913 static void Play( aout_instance_t * p_aout )
 914 {
 915     VLC_UNUSED(p_aout);
 916 }
 917
 918
 919 /*****************************************************************************
 920  * Probe: Check which devices the OS has, and add them to our audio-device menu
 921  *****************************************************************************/
 922 static void Probe( aout_instance_t * p_aout )
 923 {
 924     OSStatus            err = noErr;
 925     UInt32              i = 0, i_param_size = 0;
 926     AudioDeviceID       devid_def = 0;
 927     AudioDeviceID       *p_devices = NULL;
 928     vlc_value_t         val, text;
 929
 930     struct aout_sys_t   *p_sys = p_aout->output.p_sys;
 931
 932     /* Get number of devices */
 933     err = AudioHardwareGetPropertyInfo( kAudioHardwarePropertyDevices,
 934                                         &i_param_size, NULL );
 935     if( err != noErr )
 936     {
 937         msg_Err( p_aout, "Could not get number of devices: [%4.4s]", (char *)&err );
 938         goto error;
 939     }
 940
 941     p_sys->i_devices = i_param_size / sizeof( AudioDeviceID );
 942
 943     if( p_sys->i_devices < 1 )
 944     {
 945         msg_Err( p_aout, "No audio output devices were found." );
 946         goto error;
 947     }
 948
 949     msg_Dbg( p_aout, "system has [%u] device(s)", p_sys->i_devices );
 950
 951     /* Allocate DeviceID array */
 952     p_devices = (AudioDeviceID*)malloc( sizeof(AudioDeviceID) * p_sys->i_devices );
 953     if( p_devices == NULL )
 954         goto error;
 955
 956     /* Populate DeviceID array */
 957     err = AudioHardwareGetProperty( kAudioHardwarePropertyDevices,
 958                                     &i_param_size, p_devices );
 959     if( err != noErr )
 960     {
 961         msg_Err( p_aout, "could not get the device IDs: [%4.4s]", (char *)&err );
 962         goto error;
 963     }
 964
 965     /* Find the ID of the default Device */
 966     i_param_size = sizeof( AudioDeviceID );
 967     err = AudioHardwareGetProperty( kAudioHardwarePropertyDefaultOutputDevice,
 968                                     &i_param_size, &devid_def );
 969     if( err != noErr )
 970     {
 971         msg_Err( p_aout, "could not get default audio device: [%4.4s]", (char *)&err );
 972         goto error;
 973     }
 974     p_sys->i_default_dev = devid_def;
 975
 976     var_Create( p_aout, "audio-device", VLC_VAR_INTEGER|VLC_VAR_HASCHOICE );
 977     text.psz_string = (char*)_("Audio Device");
 978     var_Change( p_aout, "audio-device", VLC_VAR_SETTEXT, &text, NULL );
 979
 980     for( i = 0; i < p_sys->i_devices; i++ )
 981     {
 982         char *psz_name;
 983         i_param_size = 0;
 984
 985         /* Retrieve the length of the device name */
 986         err = AudioDeviceGetPropertyInfo(
 987                     p_devices[i], 0, false,
 988                     kAudioDevicePropertyDeviceName,
 989                     &i_param_size, NULL);
 990         if( err ) goto error;
 991
 992         /* Retrieve the name of the device */
 993         psz_name = (char *)malloc( i_param_size );
 994         err = AudioDeviceGetProperty(
 995                     p_devices[i], 0, false,
 996                     kAudioDevicePropertyDeviceName,
 997                     &i_param_size, psz_name);
 998         if( err ) goto error;
 999
1000         msg_Dbg( p_aout, "DevID: %u DevName: %s", p_devices[i], psz_name );
1001
1002         if( !AudioDeviceHasOutput( p_devices[i]) )
1003         {
1004             msg_Dbg( p_aout, "this device is INPUT only. skipping..." );
1005             free( psz_name );
1006             continue;
1007         }
1008
1009         /* Add the menu entries */
1010         val.i_int = (int)p_devices[i];
1011         text.psz_string = psz_name;
1012         var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
1013         text.psz_string = NULL;
1014         if( p_sys->i_default_dev == p_devices[i] )
1015         {
1016             /* The default device is the selected device normally */
1017             var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
1018             var_Set( p_aout, "audio-device", val );
1019         }
1020
1021         if( AudioDeviceSupportsDigital( p_aout, p_devices[i] ) )
1022         {
1023             val.i_int = (int)p_devices[i] | AOUT_VAR_SPDIF_FLAG;
1024             if( asprintf( &text.psz_string, _("%s (Encoded Output)"), psz_name ) != -1 )
1025             {
1026                 var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
1027                 free( text.psz_string );
1028                 if( p_sys->i_default_dev == p_devices[i]
1029                  && var_InheritBool( p_aout, "spdif" ) )
1030                 {
1031                     /* We selected to prefer SPDIF output if available
1032                      * then this "dummy" entry should be selected */
1033                     var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
1034                     var_Set( p_aout, "audio-device", val );
1035                 }
1036             }
1037         }
1038
1039         free( psz_name);
1040     }
1041
1042     /* If a device is already "preselected", then use this device */
1043     var_Get( p_aout->p_libvlc, "macosx-audio-device", &val );
1044     if( val.i_int > 0 )
1045     {
1046         var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
1047         var_Set( p_aout, "audio-device", val );
1048     }
1049
1050     /* If we change the device we want to use, we should renegotiate the audio chain */
1051     var_AddCallback( p_aout, "audio-device", AudioDeviceCallback, NULL );
1052
1053     /* Attach a Listener so that we are notified of a change in the Device setup */
1054     err = AudioHardwareAddPropertyListener( kAudioHardwarePropertyDevices,
1055                                             HardwareListener,
1056                                             (void *)p_aout );
1057     if( err )
1058         goto error;
1059
1060     free( p_devices );
1061     return;
1062
1063 error:
1064     msg_Warn( p_aout, "audio device already in use" );
1065     free( p_devices );
1066     return;
1067 }
1068
1069 /*****************************************************************************
1070  * AudioDeviceHasOutput: Checks if the Device actually provides any outputs at all
1071  *****************************************************************************/
1072 static int AudioDeviceHasOutput( AudioDeviceID i_dev_id )
1073 {
1074     UInt32            dataSize;
1075     Boolean            isWritable;
1076
1077     verify_noerr( AudioDeviceGetPropertyInfo( i_dev_id, 0, FALSE, kAudioDevicePropertyStreams, &dataSize, &isWritable) );
1078     if (dataSize == 0) return FALSE;
1079
1080     return TRUE;
1081 }
1082
1083 /*****************************************************************************
1084  * AudioDeviceSupportsDigital: Check i_dev_id for digital stream support.
1085  *****************************************************************************/
1086 static int AudioDeviceSupportsDigital( aout_instance_t *p_aout, AudioDeviceID i_dev_id )
1087 {
1088     OSStatus                    err = noErr;
1089     UInt32                      i_param_size = 0;
1090     AudioStreamID               *p_streams = NULL;
1091     int                         i = 0, i_streams = 0;
1092     bool                  b_return = false;
1093
1094     /* Retrieve all the output streams */
1095     err = AudioDeviceGetPropertyInfo( i_dev_id, 0, FALSE,
1096                                       kAudioDevicePropertyStreams,
1097                                       &i_param_size, NULL );
1098     if( err != noErr )
1099     {
1100         msg_Err( p_aout, "could not get number of streams: [%4.4s]", (char *)&err );
1101         return false;
1102     }
1103
1104     i_streams = i_param_size / sizeof( AudioStreamID );
1105     p_streams = (AudioStreamID *)malloc( i_param_size );
1106     if( p_streams == NULL )
1107         return VLC_ENOMEM;
1108
1109     err = AudioDeviceGetProperty( i_dev_id, 0, FALSE,
1110                                     kAudioDevicePropertyStreams,
1111                                     &i_param_size, p_streams );
1112
1113     if( err != noErr )
1114     {
1115         msg_Err( p_aout, "could not get number of streams: [%4.4s]", (char *)&err );
1116         return false;
1117     }
1118
1119     for( i = 0; i < i_streams; i++ )
1120     {
1121         if( AudioStreamSupportsDigital( p_aout, p_streams[i] ) )
1122             b_return = true;
1123     }
1124
1125     free( p_streams );
1126     return b_return;
1127 }
1128
1129 /*****************************************************************************
1130  * AudioStreamSupportsDigital: Check i_stream_id for digital stream support.
1131  *****************************************************************************/
1132 static int AudioStreamSupportsDigital( aout_instance_t *p_aout, AudioStreamID i_stream_id )
1133 {
1134     OSStatus                    err = noErr;
1135     UInt32                      i_param_size = 0;
1136     AudioStreamBasicDescription *p_format_list = NULL;
1137     int                         i = 0, i_formats = 0;
1138     bool                  b_return = false;
1139
1140     /* Retrieve all the stream formats supported by each output stream */
1141     err = AudioStreamGetPropertyInfo( i_stream_id, 0,
1142                                       kAudioStreamPropertyPhysicalFormats,
1143                                       &i_param_size, NULL );
1144     if( err != noErr )
1145     {
1146         msg_Err( p_aout, "could not get number of streamformats: [%4.4s]", (char *)&err );
1147         return false;
1148     }
1149
1150     i_formats = i_param_size / sizeof( AudioStreamBasicDescription );
1151     p_format_list = (AudioStreamBasicDescription *)malloc( i_param_size );
1152     if( p_format_list == NULL )
1153         return false;
1154
1155     err = AudioStreamGetProperty( i_stream_id, 0,
1156                                       kAudioStreamPropertyPhysicalFormats,
1157                                       &i_param_size, p_format_list );
1158     if( err != noErr )
1159     {
1160         msg_Err( p_aout, "could not get the list of streamformats: [%4.4s]", (char *)&err );
1161         free( p_format_list);
1162         p_format_list = NULL;
1163         return false;
1164     }
1165
1166     for( i = 0; i < i_formats; i++ )
1167     {
1168         msg_Dbg( p_aout, STREAM_FORMAT_MSG( "supported format: ", p_format_list[i] ) );
1169
1170         if( p_format_list[i].mFormatID == 'IAC3' ||
1171                   p_format_list[i].mFormatID == kAudioFormat60958AC3 )
1172         {
1173             b_return = true;
1174         }
1175     }
1176
1177     free( p_format_list );
1178     return b_return;
1179 }
1180
1181 /*****************************************************************************
1182  * AudioStreamChangeFormat: Change i_stream_id to change_format
1183  *****************************************************************************/
1184 static int AudioStreamChangeFormat( aout_instance_t *p_aout, AudioStreamID i_stream_id, AudioStreamBasicDescription change_format )
1185 {
1186     OSStatus            err = noErr;
1187     UInt32              i_param_size = 0;
1188     int i;
1189
1190     struct { vlc_mutex_t lock; vlc_cond_t cond; } w;
1191
1192     msg_Dbg( p_aout, STREAM_FORMAT_MSG( "setting stream format: ", change_format ) );
1193
1194     /* Condition because SetProperty is asynchronious */
1195     vlc_cond_init( &w.cond );
1196     vlc_mutex_init( &w.lock );
1197     vlc_mutex_lock( &w.lock );
1198
1199     /* Install the callback */
1200     err = AudioStreamAddPropertyListener( i_stream_id, 0,
1201                                       kAudioStreamPropertyPhysicalFormat,
1202                                       StreamListener, (void *)&w );
1203     if( err != noErr )
1204     {
1205         msg_Err( p_aout, "AudioStreamAddPropertyListener failed: [%4.4s]", (char *)&err );
1206         return false;
1207     }
1208
1209     /* change the format */
1210     err = AudioStreamSetProperty( i_stream_id, 0, 0,
1211                                   kAudioStreamPropertyPhysicalFormat,
1212                                   sizeof( AudioStreamBasicDescription ),
1213                                   &change_format );
1214     if( err != noErr )
1215     {
1216         msg_Err( p_aout, "could not set the stream format: [%4.4s]", (char *)&err );
1217         return false;
1218     }
1219
1220     /* The AudioStreamSetProperty is not only asynchronious (requiring the locks)
1221      * it is also not atomic in its behaviour.
1222      * Therefore we check 5 times before we really give up.
1223      * FIXME: failing isn't actually implemented yet. */
1224     for( i = 0; i < 5; i++ )
1225     {
1226         AudioStreamBasicDescription actual_format;
1227         mtime_t timeout = mdate() + 500000;
1228
1229         if( vlc_cond_timedwait( &w.cond, &w.lock, timeout ) )
1230         {
1231             msg_Dbg( p_aout, "reached timeout" );
1232         }
1233
1234         i_param_size = sizeof( AudioStreamBasicDescription );
1235         err = AudioStreamGetProperty( i_stream_id, 0,
1236                                       kAudioStreamPropertyPhysicalFormat,
1237                                       &i_param_size,
1238                                       &actual_format );
1239
1240         msg_Dbg( p_aout, STREAM_FORMAT_MSG( "actual format in use: ", actual_format ) );
1241         if( actual_format.mSampleRate == change_format.mSampleRate &&
1242             actual_format.mFormatID == change_format.mFormatID &&
1243             actual_format.mFramesPerPacket == change_format.mFramesPerPacket )
1244         {
1245             /* The right format is now active */
1246             break;
1247         }
1248         /* We need to check again */
1249     }
1250
1251     /* Removing the property listener */
1252     err = AudioStreamRemovePropertyListener( i_stream_id, 0,
1253                                             kAudioStreamPropertyPhysicalFormat,
1254                                             StreamListener );
1255     if( err != noErr )
1256     {
1257         msg_Err( p_aout, "AudioStreamRemovePropertyListener failed: [%4.4s]", (char *)&err );
1258         return false;
1259     }
1260
1261     /* Destroy the lock and condition */
1262     vlc_mutex_unlock( &w.lock );
1263     vlc_mutex_destroy( &w.lock );
1264     vlc_cond_destroy( &w.cond );
1265
1266     return true;
1267 }
1268
1269 /*****************************************************************************
1270  * RenderCallbackAnalog: This function is called everytime the AudioUnit wants
1271  * us to provide some more audio data.
1272  * Don't print anything during normal playback, calling blocking function from
1273  * this callback is not allowed.
1274  *****************************************************************************/
1275 static OSStatus RenderCallbackAnalog( vlc_object_t *_p_aout,
1276                                       AudioUnitRenderActionFlags *ioActionFlags,
1277                                       const AudioTimeStamp *inTimeStamp,
1278                                       unsigned int inBusNumber,
1279                                       unsigned int inNumberFrames,
1280                                       AudioBufferList *ioData )
1281 {
1282     AudioTimeStamp  host_time;
1283     mtime_t         current_date = 0;
1284     uint32_t        i_mData_bytes = 0;
1285
1286     aout_instance_t * p_aout = (aout_instance_t *)_p_aout;
1287     struct aout_sys_t * p_sys = p_aout->output.p_sys;
1288
1289     VLC_UNUSED(ioActionFlags);
1290     VLC_UNUSED(inBusNumber);
1291     VLC_UNUSED(inNumberFrames);
1292
1293     host_time.mFlags = kAudioTimeStampHostTimeValid;
1294     AudioDeviceTranslateTime( p_sys->i_selected_dev, inTimeStamp, &host_time );
1295
1296     /* Check for the difference between the Device clock and mdate */
1297     p_sys->clock_diff = - (mtime_t)
1298         AudioConvertHostTimeToNanos( AudioGetCurrentHostTime() ) / 1000;
1299     p_sys->clock_diff += mdate();
1300
1301     current_date = p_sys->clock_diff +
1302                    AudioConvertHostTimeToNanos( host_time.mHostTime ) / 1000;
1303                    //- ((mtime_t) 1000000 / p_aout->output.output.i_rate * 31 ); // 31 = Latency in Frames. retrieve somewhere
1304
1305     if( ioData == NULL && ioData->mNumberBuffers < 1 )
1306     {
1307         msg_Err( p_aout, "no iodata or buffers");
1308         return 0;
1309     }
1310     if( ioData->mNumberBuffers > 1 )
1311         msg_Err( p_aout, "well this is weird. seems like there is more than one buffer..." );
1312
1313
1314     if( p_sys->i_total_bytes > 0 )
1315     {
1316         i_mData_bytes = __MIN( p_sys->i_total_bytes - p_sys->i_read_bytes, ioData->mBuffers[0].mDataByteSize );
1317         vlc_memcpy( ioData->mBuffers[0].mData,
1318                     &p_sys->p_remainder_buffer[p_sys->i_read_bytes],
1319                     i_mData_bytes );
1320         p_sys->i_read_bytes += i_mData_bytes;
1321         current_date += (mtime_t) ( (mtime_t) 1000000 / p_aout->output.output.i_rate ) *
1322                         ( i_mData_bytes / 4 / aout_FormatNbChannels( &p_aout->output.output )  ); // 4 is fl32 specific
1323
1324         if( p_sys->i_read_bytes >= p_sys->i_total_bytes )
1325             p_sys->i_read_bytes = p_sys->i_total_bytes = 0;
1326     }
1327
1328     while( i_mData_bytes < ioData->mBuffers[0].mDataByteSize )
1329     {
1330         /* We don't have enough data yet */
1331         aout_buffer_t * p_buffer;
1332         p_buffer = aout_OutputNextBuffer( p_aout, current_date , false );
1333
1334         if( p_buffer != NULL )
1335         {
1336             uint32_t i_second_mData_bytes = __MIN( p_buffer->i_buffer, ioData->mBuffers[0].mDataByteSize - i_mData_bytes );
1337
1338             vlc_memcpy( (uint8_t *)ioData->mBuffers[0].mData + i_mData_bytes,
1339                         p_buffer->p_buffer, i_second_mData_bytes );
1340             i_mData_bytes += i_second_mData_bytes;
1341
1342             if( i_mData_bytes >= ioData->mBuffers[0].mDataByteSize )
1343             {
1344                 p_sys->i_total_bytes = p_buffer->i_buffer - i_second_mData_bytes;
1345                 vlc_memcpy( p_sys->p_remainder_buffer,
1346                             &p_buffer->p_buffer[i_second_mData_bytes],
1347                             p_sys->i_total_bytes );
1348                 aout_BufferFree( p_buffer );
1349                 break;
1350             }
1351             else
1352             {
1353                 /* update current_date */
1354                 current_date += (mtime_t) ( (mtime_t) 1000000 / p_aout->output.output.i_rate ) *
1355                                 ( i_second_mData_bytes / 4 / aout_FormatNbChannels( &p_aout->output.output )  ); // 4 is fl32 specific
1356             }
1357             aout_BufferFree( p_buffer );
1358         }
1359         else
1360         {
1361              vlc_memset( (uint8_t *)ioData->mBuffers[0].mData +i_mData_bytes,
1362                          0,ioData->mBuffers[0].mDataByteSize - i_mData_bytes );
1363              i_mData_bytes += ioData->mBuffers[0].mDataByteSize - i_mData_bytes;
1364         }
1365     }
1366     return( noErr );
1367 }
1368
1369 /*****************************************************************************
1370  * RenderCallbackSPDIF: callback for SPDIF audio output
1371  *****************************************************************************/
1372 static OSStatus RenderCallbackSPDIF( AudioDeviceID inDevice,
1373                                     const AudioTimeStamp * inNow,
1374                                     const void * inInputData,
1375                                     const AudioTimeStamp * inInputTime,
1376                                     AudioBufferList * outOutputData,
1377                                     const AudioTimeStamp * inOutputTime,
1378                                     void * threadGlobals )
1379 {
1380     aout_buffer_t * p_buffer;
1381     mtime_t         current_date;
1382
1383     aout_instance_t * p_aout = (aout_instance_t *)threadGlobals;
1384     struct aout_sys_t * p_sys = p_aout->output.p_sys;
1385
1386     VLC_UNUSED(inDevice);
1387     VLC_UNUSED(inInputData);
1388     VLC_UNUSED(inInputTime);
1389
1390     /* Check for the difference between the Device clock and mdate */
1391     p_sys->clock_diff = - (mtime_t)
1392         AudioConvertHostTimeToNanos( inNow->mHostTime ) / 1000;
1393     p_sys->clock_diff += mdate();
1394
1395     current_date = p_sys->clock_diff +
1396                    AudioConvertHostTimeToNanos( inOutputTime->mHostTime ) / 1000;
1397                    //- ((mtime_t) 1000000 / p_aout->output.output.i_rate * 31 ); // 31 = Latency in Frames. retrieve somewhere
1398
1399     p_buffer = aout_OutputNextBuffer( p_aout, current_date, true );
1400
1401 #define BUFFER outOutputData->mBuffers[p_sys->i_stream_index]
1402     if( p_buffer != NULL )
1403     {
1404         if( (int)BUFFER.mDataByteSize != (int)p_buffer->i_buffer)
1405             msg_Warn( p_aout, "bytesize: %d nb_bytes: %d", (int)BUFFER.mDataByteSize, (int)p_buffer->i_buffer );
1406
1407         /* move data into output data buffer */
1408         vlc_memcpy( BUFFER.mData, p_buffer->p_buffer, p_buffer->i_buffer );
1409         aout_BufferFree( p_buffer );
1410     }
1411     else
1412     {
1413         vlc_memset( BUFFER.mData, 0, BUFFER.mDataByteSize );
1414     }
1415 #undef BUFFER
1416
1417     return( noErr );
1418 }
1419
1420 /*****************************************************************************
1421  * HardwareListener: Warns us of changes in the list of registered devices
1422  *****************************************************************************/
1423 static OSStatus HardwareListener( AudioHardwarePropertyID inPropertyID,
1424                                   void * inClientData )
1425 {
1426     OSStatus err = noErr;
1427     aout_instance_t     *p_aout = (aout_instance_t *)inClientData;
1428
1429     switch( inPropertyID )
1430     {
1431         case kAudioHardwarePropertyDevices:
1432         {
1433             /* something changed in the list of devices */
1434             /* We trigger the audio-device's aout_ChannelsRestart callback */
1435             var_TriggerCallback( p_aout, "audio-device" );
1436             var_Destroy( p_aout, "audio-device" );
1437         }
1438         break;
1439     }
1440
1441     return( err );
1442 }
1443
1444 /*****************************************************************************
1445  * StreamListener
1446  *****************************************************************************/
1447 static OSStatus StreamListener( AudioStreamID inStream,
1448                                 UInt32 inChannel,
1449                                 AudioDevicePropertyID inPropertyID,
1450                                 void * inClientData )
1451 {
1452     OSStatus err = noErr;
1453     struct { vlc_mutex_t lock; vlc_cond_t cond; } * w = inClientData;
1454
1455     VLC_UNUSED(inStream);
1456     VLC_UNUSED(inChannel);
1457
1458     switch( inPropertyID )
1459     {
1460         case kAudioStreamPropertyPhysicalFormat:
1461             vlc_mutex_lock( &w->lock );
1462             vlc_cond_signal( &w->cond );
1463             vlc_mutex_unlock( &w->lock );
1464             break;
1465
1466         default:
1467             break;
1468     }
1469     return( err );
1470 }
1471
1472 /*****************************************************************************
1473  * AudioDeviceCallback: Callback triggered when the audio-device variable is changed
1474  *****************************************************************************/
1475 static int AudioDeviceCallback( vlc_object_t *p_this, const char *psz_variable,
1476                      vlc_value_t old_val, vlc_value_t new_val, void *param )
1477 {
1478     aout_instance_t *p_aout = (aout_instance_t *)p_this;
1479     var_Set( p_aout->p_libvlc, "macosx-audio-device", new_val );
1480     msg_Dbg( p_aout, "Set Device: %#"PRIx64, new_val.i_int );
1481     return aout_ChannelsRestart( p_this, psz_variable, old_val, new_val, param );
1482 }
1483