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

   1 /*****************************************************************************
   2  * auhal.c: AUHAL and Coreaudio output plugin
   3  *****************************************************************************
   4  * Copyright (C) 2005 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Derk-Jan Hartman <hartman at videolan dot org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27 #include <unistd.h>
  28 #include <sys/time.h> /* gettimeofday() */
  29
  30 #ifdef HAVE_CONFIG_H
  31 # include "config.h"
  32 #endif
  33
  34 #include <vlc/vlc.h>
  35 #include <vlc_interface.h>
  36 #include <vlc_aout.h>
  37
  38 #include <CoreAudio/CoreAudio.h>
  39 #include <AudioUnit/AudioUnitProperties.h>
  40 #include <AudioUnit/AudioUnitParameters.h>
  41 #include <AudioUnit/AudioOutputUnit.h>
  42 #include <AudioToolbox/AudioFormat.h>
  43
  44 #define STREAM_FORMAT_MSG( pre, sfm ) \
  45     pre "[%ld][%4.4s][%ld][%ld][%ld][%ld][%ld][%ld]", \
  46     (UInt32)sfm.mSampleRate, (char *)&sfm.mFormatID, \
  47     sfm.mFormatFlags, sfm.mBytesPerPacket, \
  48     sfm.mFramesPerPacket, sfm.mBytesPerFrame, \
  49     sfm.mChannelsPerFrame, sfm.mBitsPerChannel
  50
  51 #define STREAM_FORMAT_MSG_FULL( pre, sfm ) \
  52     pre ":\nsamplerate: [%ld]\nFormatID: [%4.4s]\nFormatFlags: [%ld]\nBypesPerPacket: [%ld]\nFramesPerPacket: [%ld]\nBytesPerFrame: [%ld]\nChannelsPerFrame: [%ld]\nBitsPerChannel[%ld]", \
  53     (UInt32)sfm.mSampleRate, (char *)&sfm.mFormatID, \
  54     sfm.mFormatFlags, sfm.mBytesPerPacket, \
  55     sfm.mFramesPerPacket, sfm.mBytesPerFrame, \
  56     sfm.mChannelsPerFrame, sfm.mBitsPerChannel
  57
  58 #define BUFSIZE 0xffffff
  59 #define AOUT_VAR_SPDIF_FLAG 0xf00000
  60
  61 /*
  62  * TODO:
  63  * - clean up the debug info
  64  * - clean up C99'isms
  65  * - be better at changing stream setup or devices setup changes while playing.
  66  * - fix 6.1 and 7.1
  67  */
  68
  69 /*****************************************************************************
  70  * aout_sys_t: private audio output method descriptor
  71  *****************************************************************************
  72  * This structure is part of the audio output thread descriptor.
  73  * It describes the CoreAudio specific properties of an output thread.
  74  *****************************************************************************/
  75 struct aout_sys_t
  76 {
  77     AudioDeviceID               i_default_dev;  /* Keeps DeviceID of defaultOutputDevice */
  78     AudioDeviceID               i_selected_dev; /* Keeps DeviceID of the selected device */
  79     UInt32                      i_devices;      /* Number of CoreAudio Devices */
  80     vlc_bool_t                  b_supports_digital;/* Does the currently selected device support digital mode? */
  81     vlc_bool_t                  b_digital;      /* Are we running in digital mode? */
  82     mtime_t                     clock_diff;     /* Difference between VLC clock and Device clock */
  83
  84     /* AUHAL specific */
  85     Component                   au_component;   /* The Audiocomponent we use */
  86     AudioUnit                   au_unit;        /* The AudioUnit we use */
  87     uint8_t                     p_remainder_buffer[BUFSIZE];
  88     uint32_t                    i_read_bytes;
  89     uint32_t                    i_total_bytes;
  90     AudioDeviceIOProcID         procId;
  91
  92     /* CoreAudio SPDIF mode specific */
  93     pid_t                       i_hog_pid;      /* The keep the pid of our hog status */
  94     AudioStreamID               i_stream_id;    /* The StreamID that has a cac3 streamformat */
  95     int                         i_stream_index; /* The index of i_stream_id in an AudioBufferList */
  96     AudioStreamBasicDescription stream_format;  /* The format we changed the stream to */
  97     AudioStreamBasicDescription sfmt_revert;    /* The original format of the stream */
  98     vlc_bool_t                  b_revert;       /* Wether we need to revert the stream format */
  99     vlc_bool_t                  b_changed_mixing;/* Wether we need to set the mixing mode back */
 100 };
 101
 102 /*****************************************************************************
 103  * Local prototypes.
 104  *****************************************************************************/
 105 static int      Open                    ( vlc_object_t * );
 106 static int      OpenAnalog              ( aout_instance_t * );
 107 static int      OpenSPDIF               ( aout_instance_t * );
 108 static void     Close                   ( vlc_object_t * );
 109
 110 static void     Play                    ( aout_instance_t * );
 111 static void     Probe                   ( aout_instance_t * );
 112
 113 static int      AudioDeviceHasOutput    ( AudioDeviceID );
 114 static int      AudioDeviceSupportsDigital( aout_instance_t *, AudioDeviceID );
 115 static int      AudioStreamSupportsDigital( aout_instance_t *, AudioStreamID );
 116 static int      AudioStreamChangeFormat ( aout_instance_t *, AudioStreamID, AudioStreamBasicDescription );
 117
 118 static OSStatus RenderCallbackAnalog    ( vlc_object_t *, AudioUnitRenderActionFlags *, const AudioTimeStamp *,
 119                                           unsigned int, unsigned int, AudioBufferList *);
 120 static OSStatus RenderCallbackSPDIF     ( AudioDeviceID, const AudioTimeStamp *, const void *, const AudioTimeStamp *,
 121                                           AudioBufferList *, const AudioTimeStamp *, void * );
 122 static OSStatus HardwareListener        ( AudioHardwarePropertyID, void *);
 123 static OSStatus StreamListener          ( AudioStreamID, UInt32,
 124                                           AudioDevicePropertyID, void * );
 125 static int      AudioDeviceCallback     ( vlc_object_t *, const char *,
 126                                           vlc_value_t, vlc_value_t, void * );
 127
 128
 129 /*****************************************************************************
 130  * Module descriptor
 131  *****************************************************************************/
 132 #define ADEV_TEXT N_("Audio Device")
 133 #define ADEV_LONGTEXT N_("Choose a number corresponding to the number of an " \
 134     "audio device, as listed in your 'Audio Device' menu. This device will " \
 135     "then be used by default for audio playback.")
 136
 137 vlc_module_begin();
 138     set_shortname( "auhal" );
 139     set_description( _("HAL AudioUnit output") );
 140     set_capability( "audio output", 101 );
 141     set_category( CAT_AUDIO );
 142     set_subcategory( SUBCAT_AUDIO_AOUT );
 143     set_callbacks( Open, Close );
 144     add_integer( "macosx-audio-device", 0, NULL, ADEV_TEXT, ADEV_LONGTEXT, VLC_FALSE );
 145 vlc_module_end();
 146
 147 /*****************************************************************************
 148  * Open: open macosx audio output
 149  *****************************************************************************/
 150 static int Open( vlc_object_t * p_this )
 151 {
 152     OSStatus                err = noErr;
 153     UInt32                  i_param_size = 0;
 154     struct aout_sys_t       *p_sys = NULL;
 155     vlc_bool_t              b_alive = VLC_FALSE;
 156     vlc_value_t             val;
 157     aout_instance_t         *p_aout = (aout_instance_t *)p_this;
 158
 159     /* Allocate structure */
 160     p_aout->output.p_sys = malloc( sizeof( aout_sys_t ) );
 161     if( p_aout->output.p_sys == NULL )
 162     {
 163         msg_Err( p_aout, "out of memory" );
 164         return( VLC_ENOMEM );
 165     }
 166
 167     p_sys = p_aout->output.p_sys;
 168     p_sys->i_default_dev = 0;
 169     p_sys->i_selected_dev = 0;
 170     p_sys->i_devices = 0;
 171     p_sys->b_supports_digital = VLC_FALSE;
 172     p_sys->b_digital = VLC_FALSE;
 173     p_sys->au_component = NULL;
 174     p_sys->au_unit = NULL;
 175     p_sys->clock_diff = (mtime_t) 0;
 176     p_sys->i_read_bytes = 0;
 177     p_sys->i_total_bytes = 0;
 178     p_sys->i_hog_pid = -1;
 179     p_sys->i_stream_id = 0;
 180     p_sys->i_stream_index = -1;
 181     p_sys->b_revert = VLC_FALSE;
 182     p_sys->b_changed_mixing = VLC_FALSE;
 183     memset( p_sys->p_remainder_buffer, 0, sizeof(uint8_t) * BUFSIZE );
 184
 185     p_aout->output.pf_play = Play;
 186
 187     aout_FormatPrint( p_aout, "VLC is looking for:", (audio_sample_format_t *)&p_aout->output.output );
 188
 189     /* Persistent device variable */
 190     if( var_Type( p_aout->p_libvlc, "macosx-audio-device" ) == 0 )
 191     {
 192         var_Create( p_aout->p_libvlc, "macosx-audio-device", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 193     }
 194
 195     /* Build a list of devices */
 196     if( var_Type( p_aout, "audio-device" ) == 0 )
 197     {
 198         Probe( p_aout );
 199     }
 200
 201     /* What device do we want? */
 202     if( var_Get( p_aout, "audio-device", &val ) < 0 )
 203     {
 204         msg_Err( p_aout, "audio-device var does not exist. device probe failed." );
 205         goto error;
 206     }
 207
 208     p_sys->i_selected_dev = val.i_int & ~AOUT_VAR_SPDIF_FLAG; /* remove SPDIF flag to get the true DeviceID */
 209     p_sys->b_supports_digital = ( val.i_int & AOUT_VAR_SPDIF_FLAG ) ? VLC_TRUE : VLC_FALSE;
 210
 211     /* Check if the desired device is alive and usable */
 212     /* TODO: add a callback to the device to alert us if the device dies */
 213     i_param_size = sizeof( b_alive );
 214     err = AudioDeviceGetProperty( p_sys->i_selected_dev, 0, FALSE,
 215                                   kAudioDevicePropertyDeviceIsAlive,
 216                                   &i_param_size, &b_alive );
 217
 218     if( err != noErr )
 219     {
 220         msg_Err( p_aout, "could not check whether device is alive: %4.4s", (char *)&err );
 221         goto error;
 222     }
 223
 224     if( b_alive == VLC_FALSE )
 225     {
 226         msg_Warn( p_aout, "selected audio device is not alive, switching to default device" );
 227         p_sys->i_selected_dev = p_sys->i_default_dev;
 228     }
 229
 230     i_param_size = sizeof( p_sys->i_hog_pid );
 231     err = AudioDeviceGetProperty( p_sys->i_selected_dev, 0, FALSE,
 232                                   kAudioDevicePropertyHogMode,
 233                                   &i_param_size, &p_sys->i_hog_pid );
 234
 235     if( err != noErr )
 236     {
 237         /* This is not a fatal error. Some drivers simply don't support this property */
 238         msg_Warn( p_aout, "could not check whether device is hogged: %4.4s",
 239                  (char *)&err );
 240         p_sys->i_hog_pid = -1;
 241     }
 242
 243     if( p_sys->i_hog_pid != -1 && p_sys->i_hog_pid != getpid() )
 244     {
 245         msg_Err( p_aout, "Selected audio device is exclusively in use by another program." );
 246         intf_UserFatal( p_aout, VLC_FALSE, _("Audio output failed"),
 247                         _("The selected audio output device is exclusively in "
 248                           "use by another program.") );
 249         goto error;
 250     }
 251
 252     /* Check for Digital mode or Analog output mode */
 253     if( AOUT_FMT_NON_LINEAR( &p_aout->output.output ) && p_sys->b_supports_digital )
 254     {
 255         if( OpenSPDIF( p_aout ) )
 256             return VLC_SUCCESS;
 257     }
 258     else
 259     {
 260         if( OpenAnalog( p_aout ) )
 261             return VLC_SUCCESS;
 262     }
 263
 264 error:
 265     /* If we reach this, this aout has failed */
 266     var_Destroy( p_aout, "audio-device" );
 267     free( p_sys );
 268     return VLC_EGENERIC;
 269 }
 270
 271 /*****************************************************************************
 272  * Open: open and setup a HAL AudioUnit to do analog (multichannel) audio output
 273  *****************************************************************************/
 274 static int OpenAnalog( aout_instance_t *p_aout )
 275 {
 276     struct aout_sys_t           *p_sys = p_aout->output.p_sys;
 277     OSStatus                    err = noErr;
 278     UInt32                      i_param_size = 0, i = 0;
 279     int                         i_original;
 280     ComponentDescription        desc;
 281     AudioStreamBasicDescription DeviceFormat;
 282     AudioChannelLayout          *layout;
 283     AudioChannelLayout          new_layout;
 284     AURenderCallbackStruct      input;
 285
 286     /* Lets go find our Component */
 287     desc.componentType = kAudioUnitType_Output;
 288     desc.componentSubType = kAudioUnitSubType_HALOutput;
 289     desc.componentManufacturer = kAudioUnitManufacturer_Apple;
 290     desc.componentFlags = 0;
 291     desc.componentFlagsMask = 0;
 292
 293     p_sys->au_component = FindNextComponent( NULL, &desc );
 294     if( p_sys->au_component == NULL )
 295     {
 296         msg_Warn( p_aout, "we cannot find our HAL component" );
 297         return VLC_FALSE;
 298     }
 299
 300     err = OpenAComponent( p_sys->au_component, &p_sys->au_unit );
 301     if( err != noErr )
 302     {
 303         msg_Warn( p_aout, "we cannot open our HAL component" );
 304         return VLC_FALSE;
 305     }
 306
 307     /* Set the device we will use for this output unit */
 308     err = AudioUnitSetProperty( p_sys->au_unit,
 309                          kAudioOutputUnitProperty_CurrentDevice,
 310                          kAudioUnitScope_Global,
 311                          0,
 312                          &p_sys->i_selected_dev,
 313                          sizeof( AudioDeviceID ));
 314
 315     if( err != noErr )
 316     {
 317         msg_Warn( p_aout, "we cannot select the audio device" );
 318         return VLC_FALSE;
 319     }
 320
 321     /* Get the current format */
 322     i_param_size = sizeof(AudioStreamBasicDescription);
 323
 324     err = AudioUnitGetProperty( p_sys->au_unit,
 325                                    kAudioUnitProperty_StreamFormat,
 326                                    kAudioUnitScope_Input,
 327                                    0,
 328                                    &DeviceFormat,
 329                                    &i_param_size );
 330
 331     if( err != noErr ) return VLC_FALSE;
 332     else msg_Dbg( p_aout, STREAM_FORMAT_MSG( "current format is: ", DeviceFormat ) );
 333
 334     /* Get the channel layout of the device side of the unit (vlc -> unit -> device) */
 335     err = AudioUnitGetPropertyInfo( p_sys->au_unit,
 336                                    kAudioDevicePropertyPreferredChannelLayout,
 337                                    kAudioUnitScope_Output,
 338                                    0,
 339                                    &i_param_size,
 340                                    NULL );
 341
 342     if( err == noErr )
 343     {
 344         layout = (AudioChannelLayout *)malloc( i_param_size);
 345
 346         verify_noerr( AudioUnitGetProperty( p_sys->au_unit,
 347                                        kAudioDevicePropertyPreferredChannelLayout,
 348                                        kAudioUnitScope_Output,
 349                                        0,
 350                                        layout,
 351                                        &i_param_size ));
 352
 353         /* We need to "fill out" the ChannelLayout, because there are multiple ways that it can be set */
 354         if( layout->mChannelLayoutTag == kAudioChannelLayoutTag_UseChannelBitmap)
 355         {
 356             /* bitmap defined channellayout */
 357             verify_noerr( AudioFormatGetProperty( kAudioFormatProperty_ChannelLayoutForBitmap,
 358                                     sizeof( UInt32), &layout->mChannelBitmap,
 359                                     &i_param_size,
 360                                     layout ));
 361         }
 362         else if( layout->mChannelLayoutTag != kAudioChannelLayoutTag_UseChannelDescriptions )
 363         {
 364             /* layouttags defined channellayout */
 365             verify_noerr( AudioFormatGetProperty( kAudioFormatProperty_ChannelLayoutForTag,
 366                                     sizeof( AudioChannelLayoutTag ), &layout->mChannelLayoutTag,
 367                                     &i_param_size,
 368                                     layout ));
 369         }
 370
 371         msg_Dbg( p_aout, "layout of AUHAL has %d channels" , (int)layout->mNumberChannelDescriptions );
 372
 373         /* Initialize the VLC core channel count */
 374         p_aout->output.output.i_physical_channels = 0;
 375         i_original = p_aout->output.output.i_original_channels & AOUT_CHAN_PHYSMASK;
 376
 377         if( i_original == AOUT_CHAN_CENTER || layout->mNumberChannelDescriptions < 2 )
 378         {
 379             /* We only need Mono or cannot output more than 1 channel */
 380             p_aout->output.output.i_physical_channels = AOUT_CHAN_CENTER;
 381         }
 382         else if( i_original == (AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT) || layout->mNumberChannelDescriptions < 3 )
 383         {
 384             /* We only need Stereo or cannot output more than 2 channels */
 385             p_aout->output.output.i_physical_channels = AOUT_CHAN_RIGHT | AOUT_CHAN_LEFT;
 386         }
 387         else
 388         {
 389             /* We want more than stereo and we can do that */
 390             for( i = 0; i < layout->mNumberChannelDescriptions; i++ )
 391             {
 392                 msg_Dbg( p_aout, "this is channel: %d", (int)layout->mChannelDescriptions[i].mChannelLabel );
 393
 394                 switch( layout->mChannelDescriptions[i].mChannelLabel )
 395                 {
 396                     case kAudioChannelLabel_Left:
 397                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_LEFT;
 398                         continue;
 399                     case kAudioChannelLabel_Right:
 400                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_RIGHT;
 401                         continue;
 402                     case kAudioChannelLabel_Center:
 403                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_CENTER;
 404                         continue;
 405                     case kAudioChannelLabel_LFEScreen:
 406                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_LFE;
 407                         continue;
 408                     case kAudioChannelLabel_LeftSurround:
 409                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_REARLEFT;
 410                         continue;
 411                     case kAudioChannelLabel_RightSurround:
 412                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_REARRIGHT;
 413                         continue;
 414                     case kAudioChannelLabel_RearSurroundLeft:
 415                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_MIDDLELEFT;
 416                         continue;
 417                     case kAudioChannelLabel_RearSurroundRight:
 418                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_MIDDLERIGHT;
 419                         continue;
 420                     case kAudioChannelLabel_CenterSurround:
 421                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_REARCENTER;
 422                         continue;
 423                     default:
 424                         msg_Warn( p_aout, "unrecognized channel form provided by driver: %d", (int)layout->mChannelDescriptions[i].mChannelLabel );
 425                 }
 426             }
 427             if( p_aout->output.output.i_physical_channels == 0 )
 428             {
 429                 p_aout->output.output.i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
 430                 msg_Err( p_aout, "You should configure your speaker layout with Audio Midi Setup Utility in /Applications/Utilities. Now using Stereo mode." );
 431                 intf_UserFatal( p_aout, VLC_FALSE, _("Audio device is not configured"),
 432                                 _("You should configure your speaker layout with "
 433                                   "the \"Audio Midi Setup\" utility in /Applications/"
 434                                   "Utilities. Stereo mode is being used now.") );
 435             }
 436         }
 437         free( layout );
 438     }
 439     else
 440     {
 441         msg_Warn( p_aout, "this driver does not support kAudioDevicePropertyPreferredChannelLayout. BAD DRIVER AUTHOR !!!" );
 442         p_aout->output.output.i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
 443     }
 444
 445     msg_Dbg( p_aout, "selected %d physical channels for device output", aout_FormatNbChannels( &p_aout->output.output ) );
 446     msg_Dbg( p_aout, "VLC will output: %s", aout_FormatPrintChannels( &p_aout->output.output ));
 447
 448     memset (&new_layout, 0, sizeof(new_layout));
 449     switch( aout_FormatNbChannels( &p_aout->output.output ) )
 450     {
 451         case 1:
 452             new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_Mono;
 453             break;
 454         case 2:
 455             new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_Stereo;
 456             break;
 457         case 3:
 458             if( p_aout->output.output.i_physical_channels & AOUT_CHAN_CENTER )
 459             {
 460                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_7; // L R C
 461             }
 462             else if( p_aout->output.output.i_physical_channels & AOUT_CHAN_LFE )
 463             {
 464                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_4; // L R LFE
 465             }
 466             break;
 467         case 4:
 468             if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_CENTER | AOUT_CHAN_LFE ) )
 469             {
 470                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_10; // L R C LFE
 471             }
 472             else if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT ) )
 473             {
 474                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_3; // L R Ls Rs
 475             }
 476             else if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_CENTER | AOUT_CHAN_REARCENTER ) )
 477             {
 478                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_3; // L R C Cs
 479             }
 480             break;
 481         case 5:
 482             if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_CENTER ) )
 483             {
 484                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_19; // L R Ls Rs C
 485             }
 486             else if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_LFE ) )
 487             {
 488                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_18; // L R Ls Rs LFE
 489             }
 490             break;
 491         case 6:
 492             if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_LFE ) )
 493             {
 494                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_20; // L R Ls Rs C LFE
 495             }
 496             else
 497             {
 498                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_AudioUnit_6_0; // L R Ls Rs C Cs
 499             }
 500             break;
 501         case 7:
 502             /* FIXME: This is incorrect. VLC uses the internal ordering: L R Lm Rm Lr Rr C LFE but this is wrong */
 503             new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_MPEG_6_1_A; // L R C LFE Ls Rs Cs
 504             break;
 505         case 8:
 506             /* FIXME: This is incorrect. VLC uses the internal ordering: L R Lm Rm Lr Rr C LFE but this is wrong */
 507             new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_MPEG_7_1_A; // L R C LFE Ls Rs Lc Rc
 508             break;
 509     }
 510
 511     /* Set up the format to be used */
 512     DeviceFormat.mSampleRate = p_aout->output.output.i_rate;
 513     DeviceFormat.mFormatID = kAudioFormatLinearPCM;
 514
 515     /* We use float 32. It's the best supported format by both VLC and Coreaudio */
 516     p_aout->output.output.i_format = VLC_FOURCC( 'f','l','3','2');
 517     DeviceFormat.mFormatFlags = kAudioFormatFlagsNativeFloatPacked;
 518     DeviceFormat.mBitsPerChannel = 32;
 519     DeviceFormat.mChannelsPerFrame = aout_FormatNbChannels( &p_aout->output.output );
 520
 521     /* Calculate framesizes and stuff */
 522     DeviceFormat.mFramesPerPacket = 1;
 523     DeviceFormat.mBytesPerFrame = DeviceFormat.mBitsPerChannel * DeviceFormat.mChannelsPerFrame / 8;
 524     DeviceFormat.mBytesPerPacket = DeviceFormat.mBytesPerFrame * DeviceFormat.mFramesPerPacket;
 525
 526     /* Set the desired format */
 527     i_param_size = sizeof(AudioStreamBasicDescription);
 528     verify_noerr( AudioUnitSetProperty( p_sys->au_unit,
 529                                    kAudioUnitProperty_StreamFormat,
 530                                    kAudioUnitScope_Input,
 531                                    0,
 532                                    &DeviceFormat,
 533                                    i_param_size ));
 534
 535     msg_Dbg( p_aout, STREAM_FORMAT_MSG( "we set the AU format: " , DeviceFormat ) );
 536
 537     /* Retrieve actual format */
 538     verify_noerr( AudioUnitGetProperty( p_sys->au_unit,
 539                                    kAudioUnitProperty_StreamFormat,
 540                                    kAudioUnitScope_Input,
 541                                    0,
 542                                    &DeviceFormat,
 543                                    &i_param_size ));
 544
 545     msg_Dbg( p_aout, STREAM_FORMAT_MSG( "the actual set AU format is " , DeviceFormat ) );
 546
 547     /* Do the last VLC aout setups */
 548     aout_FormatPrepare( &p_aout->output.output );
 549     p_aout->output.i_nb_samples = 2048;
 550     aout_VolumeSoftInit( p_aout );
 551
 552     /* set the IOproc callback */
 553     input.inputProc = (AURenderCallback) RenderCallbackAnalog;
 554     input.inputProcRefCon = p_aout;
 555
 556     verify_noerr( AudioUnitSetProperty( p_sys->au_unit,
 557                             kAudioUnitProperty_SetRenderCallback,
 558                             kAudioUnitScope_Input,
 559                             0, &input, sizeof( input ) ) );
 560
 561     input.inputProc = (AURenderCallback) RenderCallbackAnalog;
 562     input.inputProcRefCon = p_aout;
 563
 564     /* Set the new_layout as the layout VLC will use to feed the AU unit */
 565     verify_noerr( AudioUnitSetProperty( p_sys->au_unit,
 566                             kAudioUnitProperty_AudioChannelLayout,
 567                             kAudioUnitScope_Input,
 568                             0, &new_layout, sizeof(new_layout) ) );
 569
 570     if( new_layout.mNumberChannelDescriptions > 0 )
 571         free( new_layout.mChannelDescriptions );
 572
 573     /* AU initiliaze */
 574     verify_noerr( AudioUnitInitialize(p_sys->au_unit) );
 575
 576     /* Find the difference between device clock and mdate clock */
 577     p_sys->clock_diff = - (mtime_t)
 578         AudioConvertHostTimeToNanos( AudioGetCurrentHostTime() ) / 1000;
 579     p_sys->clock_diff += mdate();
 580
 581     /* Start the AU */
 582     verify_noerr( AudioOutputUnitStart(p_sys->au_unit) );
 583
 584     return VLC_TRUE;
 585 }
 586
 587 /*****************************************************************************
 588  * Setup a encoded digital stream (SPDIF)
 589  *****************************************************************************/
 590 static int OpenSPDIF( aout_instance_t * p_aout )
 591 {
 592     struct aout_sys_t       *p_sys = p_aout->output.p_sys;
 593     OSStatus                err = noErr;
 594     UInt32                  i_param_size = 0, b_mix = 0;
 595     Boolean                 b_writeable = VLC_FALSE;
 596     AudioStreamID           *p_streams = NULL;
 597     int                     i = 0, i_streams = 0;
 598
 599     /* Start doing the SPDIF setup proces */
 600     p_sys->b_digital = VLC_TRUE;
 601
 602     /* Hog the device */
 603     i_param_size = sizeof( p_sys->i_hog_pid );
 604     p_sys->i_hog_pid = getpid() ;
 605
 606     err = AudioDeviceSetProperty( p_sys->i_selected_dev, 0, 0, FALSE,
 607                                   kAudioDevicePropertyHogMode, i_param_size, &p_sys->i_hog_pid );
 608
 609     if( err != noErr )
 610     {
 611         msg_Err( p_aout, "failed to set hogmode: [%4.4s]", (char *)&err );
 612         return VLC_FALSE;
 613     }
 614
 615     /* Set mixable to false if we are allowed to */
 616     err = AudioDeviceGetPropertyInfo( p_sys->i_selected_dev, 0, FALSE, kAudioDevicePropertySupportsMixing,
 617                                     &i_param_size, &b_writeable );
 618
 619     err = AudioDeviceGetProperty( p_sys->i_selected_dev, 0, FALSE, kAudioDevicePropertySupportsMixing,
 620                                     &i_param_size, &b_mix );
 621
 622     if( !err && b_writeable )
 623     {
 624         b_mix = 0;
 625         err = AudioDeviceSetProperty( p_sys->i_selected_dev, 0, 0, FALSE,
 626                             kAudioDevicePropertySupportsMixing, i_param_size, &b_mix );
 627         p_sys->b_changed_mixing = VLC_TRUE;
 628     }
 629
 630     if( err != noErr )
 631     {
 632         msg_Err( p_aout, "failed to set mixmode: [%4.4s]", (char *)&err );
 633         return VLC_FALSE;
 634     }
 635
 636     /* Get a list of all the streams on this device */
 637     err = AudioDeviceGetPropertyInfo( p_sys->i_selected_dev, 0, FALSE,
 638                                       kAudioDevicePropertyStreams,
 639                                       &i_param_size, NULL );
 640     if( err != noErr )
 641     {
 642         msg_Err( p_aout, "could not get number of streams: [%4.4s]", (char *)&err );
 643         return VLC_FALSE;
 644     }
 645
 646     i_streams = i_param_size / sizeof( AudioStreamID );
 647     p_streams = (AudioStreamID *)malloc( i_param_size );
 648     if( p_streams == NULL )
 649     {
 650         msg_Err( p_aout, "out of memory" );
 651         return VLC_FALSE;
 652     }
 653
 654     err = AudioDeviceGetProperty( p_sys->i_selected_dev, 0, FALSE,
 655                                     kAudioDevicePropertyStreams,
 656                                     &i_param_size, p_streams );
 657
 658     if( err != noErr )
 659     {
 660         msg_Err( p_aout, "could not get number of streams: [%4.4s]", (char *)&err );
 661         free( p_streams );
 662         return VLC_FALSE;
 663     }
 664
 665     for( i = 0; i < i_streams && p_sys->i_stream_index < 0 ; i++ )
 666     {
 667         /* Find a stream with a cac3 stream */
 668         AudioStreamBasicDescription *p_format_list = NULL;
 669         int                         i_formats = 0, j = 0;
 670         vlc_bool_t                  b_digital = VLC_FALSE;
 671
 672         /* Retrieve all the stream formats supported by each output stream */
 673         err = AudioStreamGetPropertyInfo( p_streams[i], 0,
 674                                           kAudioStreamPropertyPhysicalFormats,
 675                                           &i_param_size, NULL );
 676         if( err != noErr )
 677         {
 678             msg_Err( p_aout, "could not get number of streamformats: [%4.4s]", (char *)&err );
 679             continue;
 680         }
 681
 682         i_formats = i_param_size / sizeof( AudioStreamBasicDescription );
 683         p_format_list = (AudioStreamBasicDescription *)malloc( i_param_size );
 684         if( p_format_list == NULL )
 685         {
 686             msg_Err( p_aout, "could not malloc the memory" );
 687             continue;
 688         }
 689
 690         err = AudioStreamGetProperty( p_streams[i], 0,
 691                                           kAudioStreamPropertyPhysicalFormats,
 692                                           &i_param_size, p_format_list );
 693         if( err != noErr )
 694         {
 695             msg_Err( p_aout, "could not get the list of streamformats: [%4.4s]", (char *)&err );
 696             free( p_format_list );
 697             continue;
 698         }
 699
 700         /* Check if one of the supported formats is a digital format */
 701         for( j = 0; j < i_formats; j++ )
 702         {
 703             if( p_format_list[j].mFormatID == 'IAC3' ||
 704                   p_format_list[j].mFormatID == kAudioFormat60958AC3 )
 705             {
 706                 b_digital = VLC_TRUE;
 707                 break;
 708             }
 709         }
 710
 711         if( b_digital )
 712         {
 713             /* if this stream supports a digital (cac3) format, then go set it. */
 714             int i_requested_rate_format = -1;
 715             int i_current_rate_format = -1;
 716             int i_backup_rate_format = -1;
 717
 718             p_sys->i_stream_id = p_streams[i];
 719             p_sys->i_stream_index = i;
 720
 721             if( p_sys->b_revert == VLC_FALSE )
 722             {
 723                 /* Retrieve the original format of this stream first if not done so already */
 724                 i_param_size = sizeof( p_sys->sfmt_revert );
 725                 err = AudioStreamGetProperty( p_sys->i_stream_id, 0,
 726                                               kAudioStreamPropertyPhysicalFormat,
 727                                               &i_param_size,
 728                                               &p_sys->sfmt_revert );
 729                 if( err != noErr )
 730                 {
 731                     msg_Err( p_aout, "could not retrieve the original streamformat: [%4.4s]", (char *)&err );
 732                     continue;
 733                 }
 734                 p_sys->b_revert = VLC_TRUE;
 735             }
 736
 737             for( j = 0; j < i_formats; j++ )
 738             {
 739                 if( p_format_list[j].mFormatID == 'IAC3' ||
 740                       p_format_list[j].mFormatID == kAudioFormat60958AC3 )
 741                 {
 742                     if( p_format_list[j].mSampleRate == p_aout->output.output.i_rate )
 743                     {
 744                         i_requested_rate_format = j;
 745                         break;
 746                     }
 747                     else if( p_format_list[j].mSampleRate == p_sys->sfmt_revert.mSampleRate )
 748                     {
 749                         i_current_rate_format = j;
 750                     }
 751                     else
 752                     {
 753                         if( i_backup_rate_format < 0 || p_format_list[j].mSampleRate > p_format_list[i_backup_rate_format].mSampleRate )
 754                             i_backup_rate_format = j;
 755                     }
 756                 }
 757
 758             }
 759
 760             if( i_requested_rate_format >= 0 ) /* We prefer to output at the samplerate of the original audio */
 761                 p_sys->stream_format = p_format_list[i_requested_rate_format];
 762             else if( i_current_rate_format >= 0 ) /* If not possible, we will try to use the current samplerate of the device */
 763                 p_sys->stream_format = p_format_list[i_current_rate_format];
 764             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) */
 765         }
 766         free( p_format_list );
 767     }
 768     free( p_streams );
 769
 770     msg_Dbg( p_aout, STREAM_FORMAT_MSG( "original stream format: ", p_sys->sfmt_revert ) );
 771
 772     if( !AudioStreamChangeFormat( p_aout, p_sys->i_stream_id, p_sys->stream_format ) )
 773         return VLC_FALSE;
 774
 775     /* Set the format flags */
 776     if( p_sys->stream_format.mFormatFlags & kAudioFormatFlagIsBigEndian )
 777         p_aout->output.output.i_format = VLC_FOURCC('s','p','d','b');
 778     else
 779         p_aout->output.output.i_format = VLC_FOURCC('s','p','d','i');
 780     p_aout->output.output.i_bytes_per_frame = AOUT_SPDIF_SIZE;
 781     p_aout->output.output.i_frame_length = A52_FRAME_NB;
 782     p_aout->output.i_nb_samples = p_aout->output.output.i_frame_length;
 783     p_aout->output.output.i_rate = (unsigned int)p_sys->stream_format.mSampleRate;
 784     aout_FormatPrepare( &p_aout->output.output );
 785     aout_VolumeNoneInit( p_aout );
 786
 787     /* Add IOProc callback */
 788     err = AudioDeviceCreateIOProcID( p_sys->i_selected_dev,
 789                                     (AudioDeviceIOProc)RenderCallbackSPDIF,
 790                                     (void *)p_aout,
 791                                     &p_sys->procId);
 792     if( err != noErr )
 793     {
 794         msg_Err( p_aout, "AudioDeviceAddIOProc failed: [%4.4s]", (char *)&err );
 795         return VLC_FALSE;
 796     }
 797
 798     /* Check for the difference between the Device clock and mdate */
 799     p_sys->clock_diff = - (mtime_t)
 800         AudioConvertHostTimeToNanos( AudioGetCurrentHostTime() ) / 1000;
 801     p_sys->clock_diff += mdate();
 802
 803     /* Start device */
 804     err = AudioDeviceStart( p_sys->i_selected_dev, (AudioDeviceIOProc)RenderCallbackSPDIF );
 805     if( err != noErr )
 806     {
 807         msg_Err( p_aout, "AudioDeviceStart failed: [%4.4s]", (char *)&err );
 808
 809         err = AudioDeviceDestroyIOProcID( p_sys->i_selected_dev,
 810                                           p_sys->procId );
 811         if( err != noErr )
 812         {
 813             msg_Err( p_aout, "AudioDeviceRemoveIOProc failed: [%4.4s]", (char *)&err );
 814         }
 815         return VLC_FALSE;
 816     }
 817
 818     return VLC_TRUE;
 819 }
 820
 821
 822 /*****************************************************************************
 823  * Close: Close HAL AudioUnit
 824  *****************************************************************************/
 825 static void Close( vlc_object_t * p_this )
 826 {
 827     aout_instance_t     *p_aout = (aout_instance_t *)p_this;
 828     struct aout_sys_t   *p_sys = p_aout->output.p_sys;
 829     OSStatus            err = noErr;
 830     UInt32              i_param_size = 0;
 831
 832     if( p_sys->au_unit )
 833     {
 834         verify_noerr( AudioOutputUnitStop( p_sys->au_unit ) );
 835         verify_noerr( AudioUnitUninitialize( p_sys->au_unit ) );
 836         verify_noerr( CloseComponent( p_sys->au_unit ) );
 837     }
 838
 839     if( p_sys->b_digital )
 840     {
 841         /* Stop device */
 842         err = AudioDeviceStop( p_sys->i_selected_dev,
 843                                (AudioDeviceIOProc)RenderCallbackSPDIF );
 844         if( err != noErr )
 845         {
 846             msg_Err( p_aout, "AudioDeviceStop failed: [%4.4s]", (char *)&err );
 847         }
 848
 849         /* Remove IOProc callback */
 850         err = AudioDeviceDestroyIOProcID( p_sys->i_selected_dev,
 851                                           p_sys->procId );
 852         if( err != noErr )
 853         {
 854             msg_Err( p_aout, "AudioDeviceRemoveIOProc failed: [%4.4s]", (char *)&err );
 855         }
 856
 857         if( p_sys->b_revert )
 858         {
 859             AudioStreamChangeFormat( p_aout, p_sys->i_stream_id, p_sys->sfmt_revert );
 860         }
 861
 862         if( p_sys->b_changed_mixing && p_sys->sfmt_revert.mFormatID != kAudioFormat60958AC3 )
 863         {
 864             int b_mix;
 865             Boolean b_writeable;
 866             /* Revert mixable to true if we are allowed to */
 867             err = AudioDeviceGetPropertyInfo( p_sys->i_selected_dev, 0, FALSE, kAudioDevicePropertySupportsMixing,
 868                                         &i_param_size, &b_writeable );
 869
 870             err = AudioDeviceGetProperty( p_sys->i_selected_dev, 0, FALSE, kAudioDevicePropertySupportsMixing,
 871                                         &i_param_size, &b_mix );
 872
 873             if( !err && b_writeable )
 874             {
 875                 msg_Dbg( p_aout, "mixable is: %d", b_mix );
 876                 b_mix = 1;
 877                 err = AudioDeviceSetProperty( p_sys->i_selected_dev, 0, 0, FALSE,
 878                                     kAudioDevicePropertySupportsMixing, i_param_size, &b_mix );
 879             }
 880
 881             if( err != noErr )
 882             {
 883                 msg_Err( p_aout, "failed to set mixmode: [%4.4s]", (char *)&err );
 884             }
 885         }
 886     }
 887
 888     err = AudioHardwareRemovePropertyListener( kAudioHardwarePropertyDevices,
 889                                                HardwareListener );
 890
 891     if( err != noErr )
 892     {
 893         msg_Err( p_aout, "AudioHardwareRemovePropertyListener failed: [%4.4s]", (char *)&err );
 894     }
 895
 896     if( p_sys->i_hog_pid == getpid() )
 897     {
 898         p_sys->i_hog_pid = -1;
 899         i_param_size = sizeof( p_sys->i_hog_pid );
 900         err = AudioDeviceSetProperty( p_sys->i_selected_dev, 0, 0, FALSE,
 901                                          kAudioDevicePropertyHogMode, i_param_size, &p_sys->i_hog_pid );
 902         if( err != noErr ) msg_Err( p_aout, "Could not release hogmode: [%4.4s]", (char *)&err );
 903     }
 904
 905     free( p_sys );
 906 }
 907
 908 /*****************************************************************************
 909  * Play: nothing to do
 910  *****************************************************************************/
 911 static void Play( aout_instance_t * p_aout )
 912 {
 913 }
 914
 915
 916 /*****************************************************************************
 917  * Probe: Check which devices the OS has, and add them to our audio-device menu
 918  *****************************************************************************/
 919 static void Probe( aout_instance_t * p_aout )
 920 {
 921     OSStatus            err = noErr;
 922     UInt32              i = 0, i_param_size = 0;
 923     AudioDeviceID       devid_def = 0;
 924     AudioDeviceID       *p_devices = NULL;
 925     vlc_value_t         val, text;
 926
 927     struct aout_sys_t   *p_sys = p_aout->output.p_sys;
 928
 929     /* Get number of devices */
 930     err = AudioHardwareGetPropertyInfo( kAudioHardwarePropertyDevices,
 931                                         &i_param_size, NULL );
 932     if( err != noErr )
 933     {
 934         msg_Err( p_aout, "Could not get number of devices: [%4.4s]", (char *)&err );
 935         goto error;
 936     }
 937
 938     p_sys->i_devices = i_param_size / sizeof( AudioDeviceID );
 939
 940     if( p_sys->i_devices < 1 )
 941     {
 942         msg_Err( p_aout, "No audio output devices were found." );
 943         goto error;
 944     }
 945
 946     msg_Dbg( p_aout, "system has [%ld] device(s)", p_sys->i_devices );
 947
 948     /* Allocate DeviceID array */
 949     p_devices = (AudioDeviceID*)malloc( sizeof(AudioDeviceID) * p_sys->i_devices );
 950     if( p_devices == NULL )
 951     {
 952         msg_Err( p_aout, "out of memory" );
 953         goto error;
 954     }
 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 = _("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, VLC_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, VLC_FALSE,
 996                     kAudioDevicePropertyDeviceName,
 997                     &i_param_size, psz_name);
 998         if( err ) goto error;
 999
1000         msg_Dbg( p_aout, "DevID: %#lx 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             continue;
1006         }
1007
1008         /* Add the menu entries */
1009         val.i_int = (int)p_devices[i];
1010         text.psz_string = strdup( psz_name );
1011         var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
1012         if( p_sys->i_default_dev == p_devices[i] )
1013         {
1014             /* The default device is the selected device normally */
1015             var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
1016             var_Set( p_aout, "audio-device", val );
1017         }
1018
1019         if( AudioDeviceSupportsDigital( p_aout, p_devices[i] ) )
1020         {
1021             val.i_int = (int)p_devices[i] | AOUT_VAR_SPDIF_FLAG;
1022             asprintf( &text.psz_string, _("%s (Encoded Output)"), psz_name );
1023             var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
1024             if( p_sys->i_default_dev == p_devices[i] && config_GetInt( p_aout, "spdif" ) )
1025             {
1026                 /* We selected to prefer SPDIF output if available
1027                  * then this "dummy" entry should be selected */
1028                 var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
1029                 var_Set( p_aout, "audio-device", val );
1030             }
1031         }
1032
1033         free( psz_name);
1034     }
1035
1036     /* If a device is already "preselected", then use this device */
1037     var_Get( p_aout->p_libvlc, "macosx-audio-device", &val );
1038     if( val.i_int > 0 )
1039     {
1040         var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
1041         var_Set( p_aout, "audio-device", val );
1042     }
1043
1044     /* If we change the device we want to use, we should renegotiate the audio chain */
1045     var_AddCallback( p_aout, "audio-device", AudioDeviceCallback, NULL );
1046
1047     /* Attach a Listener so that we are notified of a change in the Device setup */
1048     err = AudioHardwareAddPropertyListener( kAudioHardwarePropertyDevices,
1049                                             HardwareListener,
1050                                             (void *)p_aout );
1051     if( err )
1052         goto error;
1053
1054     free( p_devices );
1055     return;
1056
1057 error:
1058     var_Destroy( p_aout, "audio-device" );
1059     free( p_devices );
1060     return;
1061 }
1062
1063 /*****************************************************************************
1064  * AudioDeviceHasOutput: Checks if the Device actually provides any outputs at all
1065  *****************************************************************************/
1066 static int AudioDeviceHasOutput( AudioDeviceID i_dev_id )
1067 {
1068     UInt32            dataSize;
1069     Boolean            isWritable;
1070
1071     verify_noerr( AudioDeviceGetPropertyInfo( i_dev_id, 0, FALSE, kAudioDevicePropertyStreams, &dataSize, &isWritable) );
1072     if (dataSize == 0) return FALSE;
1073
1074     return TRUE;
1075 }
1076
1077 /*****************************************************************************
1078  * AudioDeviceSupportsDigital: Check i_dev_id for digital stream support.
1079  *****************************************************************************/
1080 static int AudioDeviceSupportsDigital( aout_instance_t *p_aout, AudioDeviceID i_dev_id )
1081 {
1082     OSStatus                    err = noErr;
1083     UInt32                      i_param_size = 0;
1084     AudioStreamID               *p_streams = NULL;
1085     int                         i = 0, i_streams = 0;
1086     vlc_bool_t                  b_return = VLC_FALSE;
1087
1088     /* Retrieve all the output streams */
1089     err = AudioDeviceGetPropertyInfo( i_dev_id, 0, FALSE,
1090                                       kAudioDevicePropertyStreams,
1091                                       &i_param_size, NULL );
1092     if( err != noErr )
1093     {
1094         msg_Err( p_aout, "could not get number of streams: [%4.4s]", (char *)&err );
1095         return VLC_FALSE;
1096     }
1097
1098     i_streams = i_param_size / sizeof( AudioStreamID );
1099     p_streams = (AudioStreamID *)malloc( i_param_size );
1100     if( p_streams == NULL )
1101     {
1102         msg_Err( p_aout, "out of memory" );
1103         return VLC_ENOMEM;
1104     }
1105
1106     err = AudioDeviceGetProperty( i_dev_id, 0, FALSE,
1107                                     kAudioDevicePropertyStreams,
1108                                     &i_param_size, p_streams );
1109
1110     if( err != noErr )
1111     {
1112         msg_Err( p_aout, "could not get number of streams: [%4.4s]", (char *)&err );
1113         return VLC_FALSE;
1114     }
1115
1116     for( i = 0; i < i_streams; i++ )
1117     {
1118         if( AudioStreamSupportsDigital( p_aout, p_streams[i] ) )
1119             b_return = VLC_TRUE;
1120     }
1121
1122     free( p_streams );
1123     return b_return;
1124 }
1125
1126 /*****************************************************************************
1127  * AudioStreamSupportsDigital: Check i_stream_id for digital stream support.
1128  *****************************************************************************/
1129 static int AudioStreamSupportsDigital( aout_instance_t *p_aout, AudioStreamID i_stream_id )
1130 {
1131     OSStatus                    err = noErr;
1132     UInt32                      i_param_size = 0;
1133     AudioStreamBasicDescription *p_format_list = NULL;
1134     int                         i = 0, i_formats = 0;
1135     vlc_bool_t                  b_return = VLC_FALSE;
1136
1137     /* Retrieve all the stream formats supported by each output stream */
1138     err = AudioStreamGetPropertyInfo( i_stream_id, 0,
1139                                       kAudioStreamPropertyPhysicalFormats,
1140                                       &i_param_size, NULL );
1141     if( err != noErr )
1142     {
1143         msg_Err( p_aout, "could not get number of streamformats: [%4.4s]", (char *)&err );
1144         return VLC_FALSE;
1145     }
1146
1147     i_formats = i_param_size / sizeof( AudioStreamBasicDescription );
1148     p_format_list = (AudioStreamBasicDescription *)malloc( i_param_size );
1149     if( p_format_list == NULL )
1150     {
1151         msg_Err( p_aout, "could not malloc the memory" );
1152         return VLC_FALSE;
1153     }
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 VLC_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 = VLC_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 timeval now;
1191     struct timespec timeout;
1192     struct { vlc_mutex_t lock; vlc_cond_t cond; } w;
1193
1194     msg_Dbg( p_aout, STREAM_FORMAT_MSG( "setting stream format: ", change_format ) );
1195
1196     /* Condition because SetProperty is asynchronious */
1197     vlc_cond_init( p_aout, &w.cond );
1198     vlc_mutex_init( p_aout, &w.lock );
1199     vlc_mutex_lock( &w.lock );
1200
1201     /* Install the callback */
1202     err = AudioStreamAddPropertyListener( i_stream_id, 0,
1203                                       kAudioStreamPropertyPhysicalFormat,
1204                                       StreamListener, (void *)&w );
1205     if( err != noErr )
1206     {
1207         msg_Err( p_aout, "AudioStreamAddPropertyListener failed: [%4.4s]", (char *)&err );
1208         return VLC_FALSE;
1209     }
1210
1211     /* change the format */
1212     err = AudioStreamSetProperty( i_stream_id, 0, 0,
1213                                   kAudioStreamPropertyPhysicalFormat,
1214                                   sizeof( AudioStreamBasicDescription ),
1215                                   &change_format );
1216     if( err != noErr )
1217     {
1218         msg_Err( p_aout, "could not set the stream format: [%4.4s]", (char *)&err );
1219         return VLC_FALSE;
1220     }
1221
1222     /* The AudioStreamSetProperty is not only asynchronious (requiring the locks)
1223      * it is also not atomic in its behaviour.
1224      * Therefore we check 5 times before we really give up.
1225      * FIXME: failing isn't actually implemented yet. */
1226     for( i = 0; i < 5; i++ )
1227     {
1228         AudioStreamBasicDescription actual_format;
1229
1230         gettimeofday( &now, NULL );
1231         timeout.tv_sec = now.tv_sec;
1232         timeout.tv_nsec = (now.tv_usec + 500000) * 1000;
1233
1234         if( pthread_cond_timedwait( &w.cond.cond, &w.lock.mutex, &timeout ) )
1235         {
1236             msg_Dbg( p_aout, "reached timeout" );
1237         }
1238
1239         i_param_size = sizeof( AudioStreamBasicDescription );
1240         err = AudioStreamGetProperty( i_stream_id, 0,
1241                                       kAudioStreamPropertyPhysicalFormat,
1242                                       &i_param_size,
1243                                       &actual_format );
1244
1245         msg_Dbg( p_aout, STREAM_FORMAT_MSG( "actual format in use: ", actual_format ) );
1246         if( actual_format.mSampleRate == change_format.mSampleRate &&
1247             actual_format.mFormatID == change_format.mFormatID &&
1248             actual_format.mFramesPerPacket == change_format.mFramesPerPacket )
1249         {
1250             /* The right format is now active */
1251             break;
1252         }
1253         /* We need to check again */
1254     }
1255
1256     /* Removing the property listener */
1257     err = AudioStreamRemovePropertyListener( i_stream_id, 0,
1258                                             kAudioStreamPropertyPhysicalFormat,
1259                                             StreamListener );
1260     if( err != noErr )
1261     {
1262         msg_Err( p_aout, "AudioStreamRemovePropertyListener failed: [%4.4s]", (char *)&err );
1263         return VLC_FALSE;
1264     }
1265
1266     /* Destroy the lock and condition */
1267     vlc_mutex_unlock( &w.lock );
1268     vlc_mutex_destroy( &w.lock );
1269     vlc_cond_destroy( &w.cond );
1270
1271     return VLC_TRUE;
1272 }
1273
1274 /*****************************************************************************
1275  * RenderCallbackAnalog: This function is called everytime the AudioUnit wants
1276  * us to provide some more audio data.
1277  * Don't print anything during normal playback, calling blocking function from
1278  * this callback is not allowed.
1279  *****************************************************************************/
1280 static OSStatus RenderCallbackAnalog( vlc_object_t *_p_aout,
1281                                       AudioUnitRenderActionFlags *ioActionFlags,
1282                                       const AudioTimeStamp *inTimeStamp,
1283                                       unsigned int inBusNummer,
1284                                       unsigned int inNumberFrames,
1285                                       AudioBufferList *ioData )
1286 {
1287     AudioTimeStamp  host_time;
1288     mtime_t         current_date = 0;
1289     uint32_t        i_mData_bytes = 0;
1290
1291     aout_instance_t * p_aout = (aout_instance_t *)_p_aout;
1292     struct aout_sys_t * p_sys = p_aout->output.p_sys;
1293
1294     host_time.mFlags = kAudioTimeStampHostTimeValid;
1295     AudioDeviceTranslateTime( p_sys->i_selected_dev, inTimeStamp, &host_time );
1296
1297     /* Check for the difference between the Device clock and mdate */
1298     p_sys->clock_diff = - (mtime_t)
1299         AudioConvertHostTimeToNanos( AudioGetCurrentHostTime() ) / 1000;
1300     p_sys->clock_diff += mdate();
1301
1302     current_date = p_sys->clock_diff +
1303                    AudioConvertHostTimeToNanos( host_time.mHostTime ) / 1000;
1304                    //- ((mtime_t) 1000000 / p_aout->output.output.i_rate * 31 ); // 31 = Latency in Frames. retrieve somewhere
1305
1306     if( ioData == NULL && ioData->mNumberBuffers < 1 )
1307     {
1308         msg_Err( p_aout, "no iodata or buffers");
1309         return 0;
1310     }
1311     if( ioData->mNumberBuffers > 1 )
1312         msg_Err( p_aout, "well this is weird. seems like there is more than one buffer..." );
1313
1314
1315     if( p_sys->i_total_bytes > 0 )
1316     {
1317         i_mData_bytes = __MIN( p_sys->i_total_bytes - p_sys->i_read_bytes, ioData->mBuffers[0].mDataByteSize );
1318         p_aout->p_libvlc->pf_memcpy( ioData->mBuffers[0].mData, &p_sys->p_remainder_buffer[p_sys->i_read_bytes], i_mData_bytes );
1319         p_sys->i_read_bytes += i_mData_bytes;
1320         current_date += (mtime_t) ( (mtime_t) 1000000 / p_aout->output.output.i_rate ) *
1321                         ( i_mData_bytes / 4 / aout_FormatNbChannels( &p_aout->output.output )  ); // 4 is fl32 specific
1322
1323         if( p_sys->i_read_bytes >= p_sys->i_total_bytes )
1324             p_sys->i_read_bytes = p_sys->i_total_bytes = 0;
1325     }
1326
1327     while( i_mData_bytes < ioData->mBuffers[0].mDataByteSize )
1328     {
1329         /* We don't have enough data yet */
1330         aout_buffer_t * p_buffer;
1331         p_buffer = aout_OutputNextBuffer( p_aout, current_date , VLC_FALSE );
1332
1333         if( p_buffer != NULL )
1334         {
1335             uint32_t i_second_mData_bytes = __MIN( p_buffer->i_nb_bytes, ioData->mBuffers[0].mDataByteSize - i_mData_bytes );
1336
1337             p_aout->p_libvlc->pf_memcpy( (uint8_t *)ioData->mBuffers[0].mData + i_mData_bytes, p_buffer->p_buffer, i_second_mData_bytes );
1338             i_mData_bytes += i_second_mData_bytes;
1339
1340             if( i_mData_bytes >= ioData->mBuffers[0].mDataByteSize )
1341             {
1342                 p_sys->i_total_bytes = p_buffer->i_nb_bytes - i_second_mData_bytes;
1343                 p_aout->p_libvlc->pf_memcpy( p_sys->p_remainder_buffer, &p_buffer->p_buffer[i_second_mData_bytes], p_sys->i_total_bytes );
1344             }
1345             else
1346             {
1347                 /* update current_date */
1348                 current_date += (mtime_t) ( (mtime_t) 1000000 / p_aout->output.output.i_rate ) *
1349                                 ( i_second_mData_bytes / 4 / aout_FormatNbChannels( &p_aout->output.output )  ); // 4 is fl32 specific
1350             }
1351             aout_BufferFree( p_buffer );
1352         }
1353         else
1354         {
1355              p_aout->p_libvlc->pf_memset( (uint8_t *)ioData->mBuffers[0].mData +i_mData_bytes, 0, ioData->mBuffers[0].mDataByteSize - i_mData_bytes );
1356              i_mData_bytes += ioData->mBuffers[0].mDataByteSize - i_mData_bytes;
1357         }
1358     }
1359     return( noErr );
1360 }
1361
1362 /*****************************************************************************
1363  * RenderCallbackSPDIF: callback for SPDIF audio output
1364  *****************************************************************************/
1365 static OSStatus RenderCallbackSPDIF( AudioDeviceID inDevice,
1366                                     const AudioTimeStamp * inNow,
1367                                     const void * inInputData,
1368                                     const AudioTimeStamp * inInputTime,
1369                                     AudioBufferList * outOutputData,
1370                                     const AudioTimeStamp * inOutputTime,
1371                                     void * threadGlobals )
1372 {
1373     aout_buffer_t * p_buffer;
1374     mtime_t         current_date;
1375
1376     aout_instance_t * p_aout = (aout_instance_t *)threadGlobals;
1377     struct aout_sys_t * p_sys = p_aout->output.p_sys;
1378
1379     /* Check for the difference between the Device clock and mdate */
1380     p_sys->clock_diff = - (mtime_t)
1381         AudioConvertHostTimeToNanos( inNow->mHostTime ) / 1000;
1382     p_sys->clock_diff += mdate();
1383
1384     current_date = p_sys->clock_diff +
1385                    AudioConvertHostTimeToNanos( inOutputTime->mHostTime ) / 1000;
1386                    //- ((mtime_t) 1000000 / p_aout->output.output.i_rate * 31 ); // 31 = Latency in Frames. retrieve somewhere
1387
1388     p_buffer = aout_OutputNextBuffer( p_aout, current_date, VLC_TRUE );
1389
1390 #define BUFFER outOutputData->mBuffers[p_sys->i_stream_index]
1391     if( p_buffer != NULL )
1392     {
1393         if( (int)BUFFER.mDataByteSize != (int)p_buffer->i_nb_bytes)
1394             msg_Warn( p_aout, "bytesize: %d nb_bytes: %d", (int)BUFFER.mDataByteSize, (int)p_buffer->i_nb_bytes );
1395
1396         /* move data into output data buffer */
1397         p_aout->p_libvlc->pf_memcpy( BUFFER.mData,
1398                                   p_buffer->p_buffer, p_buffer->i_nb_bytes );
1399         aout_BufferFree( p_buffer );
1400     }
1401     else
1402     {
1403         p_aout->p_libvlc->pf_memset( BUFFER.mData, 0, BUFFER.mDataByteSize );
1404     }
1405 #undef BUFFER
1406
1407     return( noErr );
1408 }
1409
1410 /*****************************************************************************
1411  * HardwareListener: Warns us of changes in the list of registered devices
1412  *****************************************************************************/
1413 static OSStatus HardwareListener( AudioHardwarePropertyID inPropertyID,
1414                                   void * inClientData )
1415 {
1416     OSStatus err = noErr;
1417     aout_instance_t     *p_aout = (aout_instance_t *)inClientData;
1418
1419     switch( inPropertyID )
1420     {
1421         case kAudioHardwarePropertyDevices:
1422         {
1423             /* something changed in the list of devices */
1424             /* We trigger the audio-device's aout_ChannelsRestart callback */
1425             var_Change( p_aout, "audio-device", VLC_VAR_TRIGGER_CALLBACKS, NULL, NULL );
1426             var_Destroy( p_aout, "audio-device" );
1427         }
1428         break;
1429     }
1430
1431     return( err );
1432 }
1433
1434 /*****************************************************************************
1435  * StreamListener
1436  *****************************************************************************/
1437 static OSStatus StreamListener( AudioStreamID inStream,
1438                                 UInt32 inChannel,
1439                                 AudioDevicePropertyID inPropertyID,
1440                                 void * inClientData )
1441 {
1442     OSStatus err = noErr;
1443     struct { vlc_mutex_t lock; vlc_cond_t cond; } * w = inClientData;
1444
1445     switch( inPropertyID )
1446     {
1447         case kAudioStreamPropertyPhysicalFormat:
1448             vlc_mutex_lock( &w->lock );
1449             vlc_cond_signal( &w->cond );
1450             vlc_mutex_unlock( &w->lock );
1451             break;
1452
1453         default:
1454             break;
1455     }
1456     return( err );
1457 }
1458
1459 /*****************************************************************************
1460  * AudioDeviceCallback: Callback triggered when the audio-device variable is changed
1461  *****************************************************************************/
1462 static int AudioDeviceCallback( vlc_object_t *p_this, const char *psz_variable,
1463                      vlc_value_t old_val, vlc_value_t new_val, void *param )
1464 {
1465     aout_instance_t *p_aout = (aout_instance_t *)p_this;
1466     var_Set( p_aout->p_libvlc, "macosx-audio-device", new_val );
1467     msg_Dbg( p_aout, "Set Device: %#x", new_val.i_int );
1468     return aout_ChannelsRestart( p_this, psz_variable, old_val, new_val, param );
1469 }
1470