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., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27 #include <string.h>
  28 #include <stdlib.h>
  29 #include <unistd.h>
  30
  31 #include <vlc/vlc.h>
  32 #include <vlc/aout.h>
  33
  34 #include "aout_internal.h"
  35
  36 #include <CoreAudio/CoreAudio.h>
  37 #include <AudioUnit/AudioUnitProperties.h>
  38 #include <AudioUnit/AudioUnitParameters.h>
  39 #include <AudioUnit/AudioOutputUnit.h>
  40 #include <AudioToolbox/AudioFormat.h>
  41
  42 #define STREAM_FORMAT_MSG( pre, sfm ) \
  43     pre "[%ld][%4.4s][%ld][%ld][%ld][%ld][%ld][%ld]", \
  44     (UInt32)sfm.mSampleRate, (char *)&sfm.mFormatID, \
  45     sfm.mFormatFlags, sfm.mBytesPerPacket, \
  46     sfm.mFramesPerPacket, sfm.mBytesPerFrame, \
  47     sfm.mChannelsPerFrame, sfm.mBitsPerChannel
  48
  49 #define STREAM_FORMAT_MSG_FULL( pre, sfm ) \
  50     pre ":\nsamplerate: [%ld]\nFormatID: [%4.4s]\nFormatFlags: [%ld]\nBypesPerPacket: [%ld]\nFramesPerPacket: [%ld]\nBytesPerFrame: [%ld]\nChannelsPerFrame: [%ld]\nBitsPerChannel[%ld]", \
  51     (UInt32)sfm.mSampleRate, (char *)&sfm.mFormatID, \
  52     sfm.mFormatFlags, sfm.mBytesPerPacket, \
  53     sfm.mFramesPerPacket, sfm.mBytesPerFrame, \
  54     sfm.mChannelsPerFrame, sfm.mBitsPerChannel
  55
  56 #define BUFSIZE 0xffffff
  57 #define AOUT_VAR_SPDIF_FLAG 0xf00000
  58
  59 /*
  60  * TODO:
  61  * - clean up the debug info
  62  * - clean up C99'isms
  63  * - be better at changing stream setup or devices setup changes while playing.
  64  * - fix 6.1 and 7.1
  65  */
  66
  67 /*****************************************************************************
  68  * aout_sys_t: private audio output method descriptor
  69  *****************************************************************************
  70  * This structure is part of the audio output thread descriptor.
  71  * It describes the CoreAudio specific properties of an output thread.
  72  *****************************************************************************/
  73 struct aout_sys_t
  74 {
  75     AudioDeviceID               i_default_dev;  /* Keeps DeviceID of defaultOutputDevice */
  76     AudioDeviceID               i_selected_dev; /* Keeps DeviceID of the selected device */
  77     UInt32                      i_devices;      /* Number of CoreAudio Devices */
  78     vlc_bool_t                  b_supports_digital;/* Does the currently selected device support digital mode? */
  79     vlc_bool_t                  b_digital;      /* Are we running in digital mode? */
  80     mtime_t                     clock_diff;     /* Difference between VLC clock and Device clock */
  81
  82     /* AUHAL specific */
  83     Component                   au_component;   /* The Audiocomponent we use */
  84     AudioUnit                   au_unit;        /* The AudioUnit we use */
  85     uint8_t                     p_remainder_buffer[BUFSIZE];
  86     uint32_t                    i_read_bytes;
  87     uint32_t                    i_total_bytes;
  88
  89     /* CoreAudio SPDIF mode specific */
  90     pid_t                       i_hog_pid;      /* The keep the pid of our hog status */
  91     AudioStreamID               i_stream_id;    /* The StreamID that has a cac3 streamformat */
  92     int                         i_stream_index; /* The index of i_stream_id in an AudioBufferList */
  93     AudioStreamBasicDescription stream_format;  /* The format we changed the stream to */
  94     AudioStreamBasicDescription sfmt_revert;    /* The original format of the stream */
  95     vlc_bool_t                  b_revert;       /* Wether we need to revert the stream format */
  96     vlc_bool_t                  b_changed_mixing;/* Wether we need to set the mixing mode back */
  97 };
  98
  99 /*****************************************************************************
 100  * Local prototypes.
 101  *****************************************************************************/
 102 static int      Open                    ( vlc_object_t * );
 103 static int      OpenAnalog              ( aout_instance_t * );
 104 static int      OpenSPDIF               ( aout_instance_t * );
 105 static void     Close                   ( vlc_object_t * );
 106
 107 static void     Play                    ( aout_instance_t * );
 108 static void     Probe                   ( aout_instance_t * );
 109
 110 static int      AudioDeviceHasOutput    ( AudioDeviceID );
 111 static int      AudioDeviceSupportsDigital( aout_instance_t *, AudioDeviceID );
 112 static int      AudioStreamSupportsDigital( aout_instance_t *, AudioStreamID );
 113 static int      AudioStreamChangeFormat ( aout_instance_t *, AudioStreamID, AudioStreamBasicDescription );
 114
 115 static OSStatus RenderCallbackAnalog    ( vlc_object_t *, AudioUnitRenderActionFlags *, const AudioTimeStamp *,
 116                                           unsigned int, unsigned int, AudioBufferList *);
 117 static OSStatus RenderCallbackSPDIF     ( AudioDeviceID, const AudioTimeStamp *, const void *, const AudioTimeStamp *,
 118                                           AudioBufferList *, const AudioTimeStamp *, void * );
 119 static OSStatus HardwareListener        ( AudioHardwarePropertyID, void *);
 120 static OSStatus StreamListener          ( AudioStreamID, UInt32,
 121                                           AudioDevicePropertyID, void * );
 122 static int      AudioDeviceCallback     ( vlc_object_t *, const char *,
 123                                           vlc_value_t, vlc_value_t, void * );
 124
 125
 126 /*****************************************************************************
 127  * Module descriptor
 128  *****************************************************************************/
 129 #define ADEV_TEXT N_("Audio Device")
 130 #define ADEV_LONGTEXT N_("Choose a number corresponding to the number of an " \
 131     "audio device, as listed in your 'Audio Device' menu. This device will " \
 132     "then be used by default for audio playback.")
 133
 134 vlc_module_begin();
 135     set_shortname( "auhal" );
 136     set_description( _("HAL AudioUnit output") );
 137     set_capability( "audio output", 101 );
 138     set_category( CAT_AUDIO );
 139     set_subcategory( SUBCAT_AUDIO_AOUT );
 140     set_callbacks( Open, Close );
 141     add_integer( "macosx-audio-device", 0, NULL, ADEV_TEXT, ADEV_LONGTEXT, VLC_FALSE );
 142 vlc_module_end();
 143
 144 /*****************************************************************************
 145  * Open: open macosx audio output
 146  *****************************************************************************/
 147 static int Open( vlc_object_t * p_this )
 148 {
 149     OSStatus                err = noErr;
 150     UInt32                  i_param_size = 0;
 151     struct aout_sys_t       *p_sys = NULL;
 152     vlc_bool_t              b_alive = VLC_FALSE;
 153     vlc_value_t             val;
 154     aout_instance_t         *p_aout = (aout_instance_t *)p_this;
 155
 156     /* Allocate structure */
 157     p_aout->output.p_sys = malloc( sizeof( aout_sys_t ) );
 158     if( p_aout->output.p_sys == NULL )
 159     {
 160         msg_Err( p_aout, "out of memory" );
 161         return( VLC_ENOMEM );
 162     }
 163
 164     p_sys = p_aout->output.p_sys;
 165     p_sys->i_default_dev = 0;
 166     p_sys->i_selected_dev = 0;
 167     p_sys->i_devices = 0;
 168     p_sys->b_supports_digital = VLC_FALSE;
 169     p_sys->b_digital = VLC_FALSE;
 170     p_sys->au_component = NULL;
 171     p_sys->au_unit = NULL;
 172     p_sys->clock_diff = (mtime_t) 0;
 173     p_sys->i_read_bytes = 0;
 174     p_sys->i_total_bytes = 0;
 175     p_sys->i_hog_pid = -1;
 176     p_sys->i_stream_id = 0;
 177     p_sys->i_stream_index = -1;
 178     p_sys->b_revert = VLC_FALSE;
 179     p_sys->b_changed_mixing = VLC_FALSE;
 180     memset( p_sys->p_remainder_buffer, 0, sizeof(uint8_t) * BUFSIZE );
 181
 182     p_aout->output.pf_play = Play;
 183
 184     aout_FormatPrint( p_aout, "VLC is looking for:", (audio_sample_format_t *)&p_aout->output.output );
 185
 186     /* Persistent device variable */
 187     if( var_Type( p_aout->p_vlc, "macosx-audio-device" ) == 0 )
 188     {
 189         var_Create( p_aout->p_vlc, "macosx-audio-device", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 190     }
 191
 192     /* Build a list of devices */
 193     if( var_Type( p_aout, "audio-device" ) == 0 )
 194     {
 195         Probe( p_aout );
 196     }
 197
 198     /* What device do we want? */
 199     if( var_Get( p_aout, "audio-device", &val ) < 0 )
 200     {
 201         msg_Err( p_aout, "audio-device var does not exist. device probe failed." );
 202         goto error;
 203     }
 204
 205     p_sys->i_selected_dev = val.i_int & ~AOUT_VAR_SPDIF_FLAG; /* remove SPDIF flag to get the true DeviceID */
 206     p_sys->b_supports_digital = ( val.i_int & AOUT_VAR_SPDIF_FLAG ) ? VLC_TRUE : VLC_FALSE;
 207
 208     /* Check if the desired device is alive and usable */
 209     /* TODO: add a callback to the device to alert us if the device dies */
 210     i_param_size = sizeof( b_alive );
 211     err = AudioDeviceGetProperty( p_sys->i_selected_dev, 0, FALSE,
 212                                   kAudioDevicePropertyDeviceIsAlive,
 213                                   &i_param_size, &b_alive );
 214
 215     if( err != noErr )
 216     {
 217         msg_Err( p_aout, "could not check whether device is alive: %4.4s", (char *)&err );
 218         goto error;
 219     }
 220
 221     if( b_alive == VLC_FALSE )
 222     {
 223         msg_Warn( p_aout, "selected audio device is not alive, switching to default device" );
 224         p_sys->i_selected_dev = p_sys->i_default_dev;
 225     }
 226
 227     i_param_size = sizeof( p_sys->i_hog_pid );
 228     err = AudioDeviceGetProperty( p_sys->i_selected_dev, 0, FALSE,
 229                                   kAudioDevicePropertyHogMode,
 230                                   &i_param_size, &p_sys->i_hog_pid );
 231
 232     if( err != noErr )
 233     {
 234         msg_Warn( p_aout, "could not check whether device is hogged: %4.4s",
 235                  (char *)&err );
 236         goto error;
 237     }
 238
 239     if( p_sys->i_hog_pid != -1 && p_sys->i_hog_pid != getpid() )
 240     {
 241         msg_Err( p_aout, "Selected audio device is exclusively in use by another program." );
 242         goto error;
 243     }
 244
 245     /* Check for Digital mode or Analog output mode */
 246     if( AOUT_FMT_NON_LINEAR( &p_aout->output.output ) && p_sys->b_supports_digital )
 247     {
 248         if( OpenSPDIF( p_aout ) )
 249             return VLC_SUCCESS;
 250     }
 251     else
 252     {
 253         if( OpenAnalog( p_aout ) )
 254             return VLC_SUCCESS;
 255     }
 256
 257 error:
 258     /* If we reach this, this aout has failed */
 259     var_Destroy( p_aout, "audio-device" );
 260     if( p_sys ) free( p_sys );
 261     return VLC_EGENERIC;
 262 }
 263
 264 /*****************************************************************************
 265  * Open: open and setup a HAL AudioUnit to do analog (multichannel) audio output
 266  *****************************************************************************/
 267 static int OpenAnalog( aout_instance_t *p_aout )
 268 {
 269     struct aout_sys_t           *p_sys = p_aout->output.p_sys;
 270     OSStatus                    err = noErr;
 271     UInt32                      i_param_size = 0, i = 0;
 272     int                         i_original;
 273     ComponentDescription        desc;
 274     AudioStreamBasicDescription DeviceFormat;
 275     AudioChannelLayout          *layout;
 276     AudioChannelLayout          new_layout;
 277     AURenderCallbackStruct      input;
 278
 279     /* Lets go find our Component */
 280     desc.componentType = kAudioUnitType_Output;
 281     desc.componentSubType = kAudioUnitSubType_HALOutput;
 282     desc.componentManufacturer = kAudioUnitManufacturer_Apple;
 283     desc.componentFlags = 0;
 284     desc.componentFlagsMask = 0;
 285
 286     p_sys->au_component = FindNextComponent( NULL, &desc );
 287     if( p_sys->au_component == NULL )
 288     {
 289         msg_Warn( p_aout, "we cannot find our HAL component" );
 290         return VLC_FALSE;
 291     }
 292
 293     err = OpenAComponent( p_sys->au_component, &p_sys->au_unit );
 294     if( err )
 295     {
 296         msg_Warn( p_aout, "we cannot open our HAL component" );
 297         return VLC_FALSE;
 298     }
 299
 300     /* Set the device we will use for this output unit */
 301     verify_noerr( AudioUnitSetProperty( p_sys->au_unit,
 302                          kAudioOutputUnitProperty_CurrentDevice,
 303                          kAudioUnitScope_Global,
 304                          0,
 305                          &p_sys->i_selected_dev,
 306                          sizeof( AudioDeviceID )));
 307
 308     /* Get the current format */
 309     i_param_size = sizeof(AudioStreamBasicDescription);
 310
 311     verify_noerr( AudioUnitGetProperty( p_sys->au_unit,
 312                                    kAudioUnitProperty_StreamFormat,
 313                                    kAudioUnitScope_Input,
 314                                    0,
 315                                    &DeviceFormat,
 316                                    &i_param_size ));
 317
 318     msg_Dbg( p_aout, STREAM_FORMAT_MSG( "current format is: ", DeviceFormat ) );
 319
 320     /* Get the channel layout of the device side of the unit (vlc -> unit -> device) */
 321     verify_noerr( AudioUnitGetPropertyInfo( p_sys->au_unit,
 322                                    kAudioDevicePropertyPreferredChannelLayout,
 323                                    kAudioUnitScope_Output,
 324                                    0,
 325                                    &i_param_size,
 326                                    NULL ));
 327
 328     layout = (AudioChannelLayout *)malloc( i_param_size);
 329
 330     verify_noerr( AudioUnitGetProperty( p_sys->au_unit,
 331                                    kAudioDevicePropertyPreferredChannelLayout,
 332                                    kAudioUnitScope_Output,
 333                                    0,
 334                                    layout,
 335                                    &i_param_size ));
 336
 337     /* We need to "fill out" the ChannelLayout, because there are multiple ways that it can be set */
 338     if( layout->mChannelLayoutTag == kAudioChannelLayoutTag_UseChannelBitmap)
 339     {
 340         /* bitmap defined channellayout */
 341         verify_noerr( AudioFormatGetProperty( kAudioFormatProperty_ChannelLayoutForBitmap,
 342                                 sizeof( UInt32), &layout->mChannelBitmap,
 343                                 &i_param_size,
 344                                 layout ));
 345     }
 346     else if( layout->mChannelLayoutTag != kAudioChannelLayoutTag_UseChannelDescriptions )
 347     {
 348         /* layouttags defined channellayout */
 349         verify_noerr( AudioFormatGetProperty( kAudioFormatProperty_ChannelLayoutForTag,
 350                                 sizeof( AudioChannelLayoutTag ), &layout->mChannelLayoutTag,
 351                                 &i_param_size,
 352                                 layout ));
 353     }
 354
 355     msg_Dbg( p_aout, "layout of AUHAL has %d channels" , (int)layout->mNumberChannelDescriptions );
 356
 357     /* Initialize the VLC core channel count */
 358     p_aout->output.output.i_physical_channels = 0;
 359     i_original = p_aout->output.output.i_original_channels & AOUT_CHAN_PHYSMASK;
 360
 361     if( i_original == AOUT_CHAN_CENTER || layout->mNumberChannelDescriptions < 2 )
 362     {
 363         /* We only need Mono or cannot output more than 1 channel */
 364         p_aout->output.output.i_physical_channels = AOUT_CHAN_CENTER;
 365     }
 366     else if( i_original == (AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT) || layout->mNumberChannelDescriptions < 3 )
 367     {
 368         /* We only need Stereo or cannot output more than 2 channels */
 369         p_aout->output.output.i_physical_channels = AOUT_CHAN_RIGHT | AOUT_CHAN_LEFT;
 370     }
 371     else
 372     {
 373         /* We want more than stereo and we can do that */
 374         for( i = 0; i < layout->mNumberChannelDescriptions; i++ )
 375         {
 376             msg_Dbg( p_aout, "this is channel: %d", (int)layout->mChannelDescriptions[i].mChannelLabel );
 377
 378             switch( layout->mChannelDescriptions[i].mChannelLabel )
 379             {
 380                 case kAudioChannelLabel_Left:
 381                     p_aout->output.output.i_physical_channels |= AOUT_CHAN_LEFT;
 382                     continue;
 383                 case kAudioChannelLabel_Right:
 384                     p_aout->output.output.i_physical_channels |= AOUT_CHAN_RIGHT;
 385                     continue;
 386                 case kAudioChannelLabel_Center:
 387                     p_aout->output.output.i_physical_channels |= AOUT_CHAN_CENTER;
 388                     continue;
 389                 case kAudioChannelLabel_LFEScreen:
 390                     p_aout->output.output.i_physical_channels |= AOUT_CHAN_LFE;
 391                     continue;
 392                 case kAudioChannelLabel_LeftSurround:
 393                     p_aout->output.output.i_physical_channels |= AOUT_CHAN_REARLEFT;
 394                     continue;
 395                 case kAudioChannelLabel_RightSurround:
 396                     p_aout->output.output.i_physical_channels |= AOUT_CHAN_REARRIGHT;
 397                     continue;
 398                 case kAudioChannelLabel_RearSurroundLeft:
 399                     p_aout->output.output.i_physical_channels |= AOUT_CHAN_MIDDLELEFT;
 400                     continue;
 401                 case kAudioChannelLabel_RearSurroundRight:
 402                     p_aout->output.output.i_physical_channels |= AOUT_CHAN_MIDDLERIGHT;
 403                     continue;
 404                 case kAudioChannelLabel_CenterSurround:
 405                     p_aout->output.output.i_physical_channels |= AOUT_CHAN_REARCENTER;
 406                     continue;
 407                 default:
 408                     msg_Warn( p_aout, "Unrecognized channel form provided by driver: %d", (int)layout->mChannelDescriptions[i].mChannelLabel );
 409             }
 410         }
 411         if( p_aout->output.output.i_physical_channels == 0 )
 412         {
 413             p_aout->output.output.i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
 414             msg_Err( p_aout, "You should configure your speaker layout with Audio Midi Setup Utility in /Applications/Utilities. Now using Stereo mode." );
 415         }
 416     }
 417     if( layout ) free( layout );
 418
 419     msg_Dbg( p_aout, "selected %d physical channels for device output", aout_FormatNbChannels( &p_aout->output.output ) );
 420     msg_Dbg( p_aout, "VLC will output: %s", aout_FormatPrintChannels( &p_aout->output.output ));
 421
 422     memset (&new_layout, 0, sizeof(new_layout));
 423     switch( aout_FormatNbChannels( &p_aout->output.output ) )
 424     {
 425         case 1:
 426             new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_Mono;
 427             break;
 428         case 2:
 429             new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_Stereo;
 430             break;
 431         case 3:
 432             if( p_aout->output.output.i_physical_channels & AOUT_CHAN_CENTER )
 433             {
 434                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_7; // L R C
 435             }
 436             else if( p_aout->output.output.i_physical_channels & AOUT_CHAN_LFE )
 437             {
 438                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_4; // L R LFE
 439             }
 440             break;
 441         case 4:
 442             if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_CENTER | AOUT_CHAN_LFE ) )
 443             {
 444                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_10; // L R C LFE
 445             }
 446             else if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT ) )
 447             {
 448                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_3; // L R Ls Rs
 449             }
 450             else if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_CENTER | AOUT_CHAN_REARCENTER ) )
 451             {
 452                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_3; // L R C Cs
 453             }
 454             break;
 455         case 5:
 456             if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_CENTER ) )
 457             {
 458                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_19; // L R Ls Rs C
 459             }
 460             else if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_LFE ) )
 461             {
 462                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_18; // L R Ls Rs LFE
 463             }
 464             break;
 465         case 6:
 466             if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_LFE ) )
 467             {
 468                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_20; // L R Ls Rs C LFE
 469             }
 470             else
 471             {
 472                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_AudioUnit_6_0; // L R Ls Rs C Cs
 473             }
 474             break;
 475         case 7:
 476             /* FIXME: This is incorrect. VLC uses the internal ordering: L R Lm Rm Lr Rr C LFE but this is wrong */
 477             new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_MPEG_6_1_A; // L R C LFE Ls Rs Cs
 478             break;
 479         case 8:
 480             /* FIXME: This is incorrect. VLC uses the internal ordering: L R Lm Rm Lr Rr C LFE but this is wrong */
 481             new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_MPEG_7_1_A; // L R C LFE Ls Rs Lc Rc
 482             break;
 483     }
 484
 485     /* Set up the format to be used */
 486     DeviceFormat.mSampleRate = p_aout->output.output.i_rate;
 487     DeviceFormat.mFormatID = kAudioFormatLinearPCM;
 488
 489     /* We use float 32. It's the best supported format by both VLC and Coreaudio */
 490     p_aout->output.output.i_format = VLC_FOURCC( 'f','l','3','2');
 491     DeviceFormat.mFormatFlags = kAudioFormatFlagsNativeFloatPacked;
 492     DeviceFormat.mBitsPerChannel = 32;
 493     DeviceFormat.mChannelsPerFrame = aout_FormatNbChannels( &p_aout->output.output );
 494
 495     /* Calculate framesizes and stuff */
 496     DeviceFormat.mFramesPerPacket = 1;
 497     DeviceFormat.mBytesPerFrame = DeviceFormat.mBitsPerChannel * DeviceFormat.mChannelsPerFrame / 8;
 498     DeviceFormat.mBytesPerPacket = DeviceFormat.mBytesPerFrame * DeviceFormat.mFramesPerPacket;
 499
 500     /* Set the desired format */
 501     i_param_size = sizeof(AudioStreamBasicDescription);
 502     verify_noerr( AudioUnitSetProperty( p_sys->au_unit,
 503                                    kAudioUnitProperty_StreamFormat,
 504                                    kAudioUnitScope_Input,
 505                                    0,
 506                                    &DeviceFormat,
 507                                    i_param_size ));
 508
 509     msg_Dbg( p_aout, STREAM_FORMAT_MSG( "we set the AU format: " , DeviceFormat ) );
 510
 511     /* Retrieve actual format */
 512     verify_noerr( AudioUnitGetProperty( p_sys->au_unit,
 513                                    kAudioUnitProperty_StreamFormat,
 514                                    kAudioUnitScope_Input,
 515                                    0,
 516                                    &DeviceFormat,
 517                                    &i_param_size ));
 518
 519     msg_Dbg( p_aout, STREAM_FORMAT_MSG( "the actual set AU format is " , DeviceFormat ) );
 520
 521     /* Do the last VLC aout setups */
 522     aout_FormatPrepare( &p_aout->output.output );
 523     p_aout->output.i_nb_samples = 2048;
 524     aout_VolumeSoftInit( p_aout );
 525
 526     /* set the IOproc callback */
 527     input.inputProc = (AURenderCallback) RenderCallbackAnalog;
 528     input.inputProcRefCon = p_aout;
 529
 530     verify_noerr( AudioUnitSetProperty( p_sys->au_unit,
 531                             kAudioUnitProperty_SetRenderCallback,
 532                             kAudioUnitScope_Input,
 533                             0, &input, sizeof( input ) ) );
 534
 535     input.inputProc = (AURenderCallback) RenderCallbackAnalog;
 536     input.inputProcRefCon = p_aout;
 537
 538     /* Set the new_layout as the layout VLC will use to feed the AU unit */
 539     verify_noerr( AudioUnitSetProperty( p_sys->au_unit,
 540                             kAudioUnitProperty_AudioChannelLayout,
 541                             kAudioUnitScope_Input,
 542                             0, &new_layout, sizeof(new_layout) ) );
 543
 544     if( new_layout.mNumberChannelDescriptions > 0 )
 545         free( new_layout.mChannelDescriptions );
 546
 547     /* AU initiliaze */
 548     verify_noerr( AudioUnitInitialize(p_sys->au_unit) );
 549
 550     /* Find the difference between device clock and mdate clock */
 551     p_sys->clock_diff = - (mtime_t)
 552         AudioConvertHostTimeToNanos( AudioGetCurrentHostTime() ) / 1000;
 553     p_sys->clock_diff += mdate();
 554
 555     /* Start the AU */
 556     verify_noerr( AudioOutputUnitStart(p_sys->au_unit) );
 557
 558     return VLC_TRUE;
 559 }
 560
 561 /*****************************************************************************
 562  * Setup a encoded digital stream (SPDIF)
 563  *****************************************************************************/
 564 static int OpenSPDIF( aout_instance_t * p_aout )
 565 {
 566     struct aout_sys_t       *p_sys = p_aout->output.p_sys;
 567     OSStatus                err = noErr;
 568     UInt32                  i_param_size = 0, b_mix = 0;
 569     Boolean                 b_writeable = VLC_FALSE;
 570     AudioStreamID           *p_streams = NULL;
 571     int                     i = 0, i_streams = 0;
 572
 573     /* Start doing the SPDIF setup proces */
 574     p_sys->b_digital = VLC_TRUE;
 575
 576     /* Hog the device */
 577     i_param_size = sizeof( p_sys->i_hog_pid );
 578     p_sys->i_hog_pid = getpid() ;
 579
 580     err = AudioDeviceSetProperty( p_sys->i_selected_dev, 0, 0, FALSE,
 581                                   kAudioDevicePropertyHogMode, i_param_size, &p_sys->i_hog_pid );
 582
 583     if( err != noErr )
 584     {
 585         msg_Err( p_aout, "failed to set hogmode: [%4.4s]", (char *)&err );
 586         return VLC_FALSE;
 587     }
 588
 589     /* Set mixable to false if we are allowed to */
 590     err = AudioDeviceGetPropertyInfo( p_sys->i_selected_dev, 0, FALSE, kAudioDevicePropertySupportsMixing,
 591                                     &i_param_size, &b_writeable );
 592
 593     err = AudioDeviceGetProperty( p_sys->i_selected_dev, 0, FALSE, kAudioDevicePropertySupportsMixing,
 594                                     &i_param_size, &b_mix );
 595
 596     if( !err && b_writeable )
 597     {
 598         b_mix = 0;
 599         err = AudioDeviceSetProperty( p_sys->i_selected_dev, 0, 0, FALSE,
 600                             kAudioDevicePropertySupportsMixing, i_param_size, &b_mix );
 601         p_sys->b_changed_mixing = VLC_TRUE;
 602     }
 603
 604     if( err != noErr )
 605     {
 606         msg_Err( p_aout, "failed to set mixmode: [%4.4s]", (char *)&err );
 607         return VLC_FALSE;
 608     }
 609
 610     /* Get a list of all the streams on this device */
 611     err = AudioDeviceGetPropertyInfo( p_sys->i_selected_dev, 0, FALSE,
 612                                       kAudioDevicePropertyStreams,
 613                                       &i_param_size, NULL );
 614     if( err != noErr )
 615     {
 616         msg_Err( p_aout, "could not get number of streams: [%4.4s]", (char *)&err );
 617         return VLC_FALSE;
 618     }
 619
 620     i_streams = i_param_size / sizeof( AudioStreamID );
 621     p_streams = (AudioStreamID *)malloc( i_param_size );
 622     if( p_streams == NULL )
 623     {
 624         msg_Err( p_aout, "Out of memory" );
 625         return VLC_FALSE;
 626     }
 627
 628     err = AudioDeviceGetProperty( p_sys->i_selected_dev, 0, FALSE,
 629                                     kAudioDevicePropertyStreams,
 630                                     &i_param_size, p_streams );
 631
 632     if( err != noErr )
 633     {
 634         msg_Err( p_aout, "could not get number of streams: [%4.4s]", (char *)&err );
 635         if( p_streams ) free( p_streams );
 636         return VLC_FALSE;
 637     }
 638
 639     for( i = 0; i < i_streams && p_sys->i_stream_index < 0 ; i++ )
 640     {
 641         /* Find a stream with a cac3 stream */
 642         AudioStreamBasicDescription *p_format_list = NULL;
 643         int                         i_formats = 0, j = 0;
 644         vlc_bool_t                  b_digital = VLC_FALSE;
 645
 646         /* Retrieve all the stream formats supported by each output stream */
 647         err = AudioStreamGetPropertyInfo( p_streams[i], 0,
 648                                           kAudioStreamPropertyPhysicalFormats,
 649                                           &i_param_size, NULL );
 650         if( err != noErr )
 651         {
 652             msg_Err( p_aout, "could not get number of streamformats: [%4.4s]", (char *)&err );
 653             continue;
 654         }
 655
 656         i_formats = i_param_size / sizeof( AudioStreamBasicDescription );
 657         p_format_list = (AudioStreamBasicDescription *)malloc( i_param_size );
 658         if( p_format_list == NULL )
 659         {
 660             msg_Err( p_aout, "could not malloc the memory" );
 661             continue;
 662         }
 663
 664         err = AudioStreamGetProperty( p_streams[i], 0,
 665                                           kAudioStreamPropertyPhysicalFormats,
 666                                           &i_param_size, p_format_list );
 667         if( err != noErr )
 668         {
 669             msg_Err( p_aout, "could not get the list of streamformats: [%4.4s]", (char *)&err );
 670             if( p_format_list) free( p_format_list);
 671             continue;
 672         }
 673
 674         /* Check if one of the supported formats is a digital format */
 675         for( j = 0; j < i_formats; j++ )
 676         {
 677             if( p_format_list[j].mFormatID == 'IAC3' ||
 678                   p_format_list[j].mFormatID == kAudioFormat60958AC3 )
 679             {
 680                 b_digital = VLC_TRUE;
 681                 break;
 682             }
 683         }
 684
 685         if( b_digital )
 686         {
 687             /* if this stream supports a digital (cac3) format, then go set it. */
 688             int i_requested_rate_format = -1;
 689             int i_current_rate_format = -1;
 690             int i_backup_rate_format = -1;
 691
 692             p_sys->i_stream_id = p_streams[i];
 693             p_sys->i_stream_index = i;
 694
 695             if( p_sys->b_revert == VLC_FALSE )
 696             {
 697                 /* Retrieve the original format of this stream first if not done so already */
 698                 i_param_size = sizeof( p_sys->sfmt_revert );
 699                 err = AudioStreamGetProperty( p_sys->i_stream_id, 0,
 700                                               kAudioStreamPropertyPhysicalFormat,
 701                                               &i_param_size,
 702                                               &p_sys->sfmt_revert );
 703                 if( err != noErr )
 704                 {
 705                     msg_Err( p_aout, "could not retrieve the original streamformat: [%4.4s]", (char *)&err );
 706                     continue;
 707                 }
 708                 p_sys->b_revert = VLC_TRUE;
 709             }
 710
 711             for( j = 0; j < i_formats; j++ )
 712             {
 713                 if( p_format_list[j].mFormatID == 'IAC3' ||
 714                       p_format_list[j].mFormatID == kAudioFormat60958AC3 )
 715                 {
 716                     if( p_format_list[j].mSampleRate == p_aout->output.output.i_rate )
 717                     {
 718                         i_requested_rate_format = j;
 719                         break;
 720                     }
 721                     else if( p_format_list[j].mSampleRate == p_sys->sfmt_revert.mSampleRate )
 722                     {
 723                         i_current_rate_format = j;
 724                     }
 725                     else
 726                     {
 727                         if( i_backup_rate_format < 0 || p_format_list[j].mSampleRate > p_format_list[i_backup_rate_format].mSampleRate )
 728                             i_backup_rate_format = j;
 729                     }
 730                 }
 731
 732             }
 733
 734             if( i_requested_rate_format >= 0 ) /* We prefer to output at the samplerate of the original audio */
 735                 p_sys->stream_format = p_format_list[i_requested_rate_format];
 736             else if( i_current_rate_format >= 0 ) /* If not possible, we will try to use the current samplerate of the device */
 737                 p_sys->stream_format = p_format_list[i_current_rate_format];
 738             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) */
 739         }
 740         if( p_format_list ) free( p_format_list );
 741     }
 742     if( p_streams ) free( p_streams );
 743
 744     msg_Dbg( p_aout, STREAM_FORMAT_MSG( "original stream format: ", p_sys->sfmt_revert ) );
 745
 746     if( !AudioStreamChangeFormat( p_aout, p_sys->i_stream_id, p_sys->stream_format ) )
 747         return VLC_FALSE;
 748
 749     /* Set the format flags */
 750     if( p_sys->stream_format.mFormatFlags & kAudioFormatFlagIsBigEndian )
 751         p_aout->output.output.i_format = VLC_FOURCC('s','p','d','b');
 752     else
 753         p_aout->output.output.i_format = VLC_FOURCC('s','p','d','i');
 754     p_aout->output.output.i_bytes_per_frame = AOUT_SPDIF_SIZE;
 755     p_aout->output.output.i_frame_length = A52_FRAME_NB;
 756     p_aout->output.i_nb_samples = p_aout->output.output.i_frame_length;
 757     p_aout->output.output.i_rate = (unsigned int)p_sys->stream_format.mSampleRate;
 758     aout_FormatPrepare( &p_aout->output.output );
 759     aout_VolumeNoneInit( p_aout );
 760
 761     /* Add IOProc callback */
 762     err = AudioDeviceAddIOProc( p_sys->i_selected_dev,
 763                                 (AudioDeviceIOProc)RenderCallbackSPDIF,
 764                                 (void *)p_aout );
 765     if( err != noErr )
 766     {
 767         msg_Err( p_aout, "AudioDeviceAddIOProc failed: [%4.4s]", (char *)&err );
 768         return VLC_FALSE;
 769     }
 770
 771     /* Check for the difference between the Device clock and mdate */
 772     p_sys->clock_diff = - (mtime_t)
 773         AudioConvertHostTimeToNanos( AudioGetCurrentHostTime() ) / 1000;
 774     p_sys->clock_diff += mdate();
 775
 776     /* Start device */
 777     err = AudioDeviceStart( p_sys->i_selected_dev, (AudioDeviceIOProc)RenderCallbackSPDIF );
 778     if( err != noErr )
 779     {
 780         msg_Err( p_aout, "AudioDeviceStart failed: [%4.4s]", (char *)&err );
 781
 782         err = AudioDeviceRemoveIOProc( p_sys->i_selected_dev,
 783                                        (AudioDeviceIOProc)RenderCallbackSPDIF );
 784         if( err != noErr )
 785         {
 786             msg_Err( p_aout, "AudioDeviceRemoveIOProc failed: [%4.4s]", (char *)&err );
 787         }
 788         return VLC_FALSE;
 789     }
 790
 791     return VLC_TRUE;
 792 }
 793
 794
 795 /*****************************************************************************
 796  * Close: Close HAL AudioUnit
 797  *****************************************************************************/
 798 static void Close( vlc_object_t * p_this )
 799 {
 800     aout_instance_t     *p_aout = (aout_instance_t *)p_this;
 801     struct aout_sys_t   *p_sys = p_aout->output.p_sys;
 802     OSStatus            err = noErr;
 803     UInt32              i_param_size = 0;
 804
 805     if( p_sys->au_unit )
 806     {
 807         verify_noerr( AudioOutputUnitStop( p_sys->au_unit ) );
 808         verify_noerr( AudioUnitUninitialize( p_sys->au_unit ) );
 809         verify_noerr( CloseComponent( p_sys->au_unit ) );
 810     }
 811
 812     if( p_sys->b_digital )
 813     {
 814         /* Stop device */
 815         err = AudioDeviceStop( p_sys->i_selected_dev,
 816                                (AudioDeviceIOProc)RenderCallbackSPDIF );
 817         if( err != noErr )
 818         {
 819             msg_Err( p_aout, "AudioDeviceStop failed: [%4.4s]", (char *)&err );
 820         }
 821
 822         /* Remove IOProc callback */
 823         err = AudioDeviceRemoveIOProc( p_sys->i_selected_dev,
 824                                        (AudioDeviceIOProc)RenderCallbackSPDIF );
 825         if( err != noErr )
 826         {
 827             msg_Err( p_aout, "AudioDeviceRemoveIOProc failed: [%4.4s]", (char *)&err );
 828         }
 829
 830         if( p_sys->b_revert )
 831         {
 832             AudioStreamChangeFormat( p_aout, p_sys->i_stream_id, p_sys->sfmt_revert );
 833         }
 834
 835         if( p_sys->b_changed_mixing && p_sys->sfmt_revert.mFormatID != kAudioFormat60958AC3 )
 836         {
 837             int b_mix;
 838             Boolean b_writeable;
 839             /* Revert mixable to true if we are allowed to */
 840             err = AudioDeviceGetPropertyInfo( p_sys->i_selected_dev, 0, FALSE, kAudioDevicePropertySupportsMixing,
 841                                         &i_param_size, &b_writeable );
 842
 843             err = AudioDeviceGetProperty( p_sys->i_selected_dev, 0, FALSE, kAudioDevicePropertySupportsMixing,
 844                                         &i_param_size, &b_mix );
 845
 846             if( !err && b_writeable )
 847             {
 848                 msg_Dbg( p_aout, "mixable is: %d", b_mix );
 849                 b_mix = 1;
 850                 err = AudioDeviceSetProperty( p_sys->i_selected_dev, 0, 0, FALSE,
 851                                     kAudioDevicePropertySupportsMixing, i_param_size, &b_mix );
 852             }
 853
 854             if( err != noErr )
 855             {
 856                 msg_Err( p_aout, "failed to set mixmode: [%4.4s]", (char *)&err );
 857             }
 858         }
 859     }
 860
 861     err = AudioHardwareRemovePropertyListener( kAudioHardwarePropertyDevices,
 862                                                HardwareListener );
 863
 864     if( err != noErr )
 865     {
 866         msg_Err( p_aout, "AudioHardwareRemovePropertyListener failed: [%4.4s]", (char *)&err );
 867     }
 868
 869     if( p_sys->i_hog_pid == getpid() )
 870     {
 871         p_sys->i_hog_pid = -1;
 872         i_param_size = sizeof( p_sys->i_hog_pid );
 873         err = AudioDeviceSetProperty( p_sys->i_selected_dev, 0, 0, FALSE,
 874                                          kAudioDevicePropertyHogMode, i_param_size, &p_sys->i_hog_pid );
 875         if( err != noErr ) msg_Err( p_aout, "Could not release hogmode: [%4.4s]", (char *)&err );
 876     }
 877
 878     if( p_sys ) free( p_sys );
 879 }
 880
 881 /*****************************************************************************
 882  * Play: nothing to do
 883  *****************************************************************************/
 884 static void Play( aout_instance_t * p_aout )
 885 {
 886 }
 887
 888
 889 /*****************************************************************************
 890  * Probe: Check which devices the OS has, and add them to our audio-device menu
 891  *****************************************************************************/
 892 static void Probe( aout_instance_t * p_aout )
 893 {
 894     OSStatus            err = noErr;
 895     UInt32              i = 0, i_param_size = 0;
 896     AudioDeviceID       devid_def = 0;
 897     AudioDeviceID       *p_devices = NULL;
 898     vlc_value_t         val, text;
 899
 900     struct aout_sys_t   *p_sys = p_aout->output.p_sys;
 901
 902     /* Get number of devices */
 903     err = AudioHardwareGetPropertyInfo( kAudioHardwarePropertyDevices,
 904                                         &i_param_size, NULL );
 905     if( err != noErr )
 906     {
 907         msg_Err( p_aout, "Could not get number of devices: [%4.4s]", (char *)&err );
 908         goto error;
 909     }
 910
 911     p_sys->i_devices = i_param_size / sizeof( AudioDeviceID );
 912
 913     if( p_sys->i_devices < 1 )
 914     {
 915         msg_Err( p_aout, "No audio output devices were found." );
 916         goto error;
 917     }
 918
 919     msg_Dbg( p_aout, "system has [%ld] device(s)", p_sys->i_devices );
 920
 921     /* Allocate DeviceID array */
 922     p_devices = (AudioDeviceID*)malloc( sizeof(AudioDeviceID) * p_sys->i_devices );
 923     if( p_devices == NULL )
 924     {
 925         msg_Err( p_aout, "out of memory" );
 926         goto error;
 927     }
 928
 929     /* Populate DeviceID array */
 930     err = AudioHardwareGetProperty( kAudioHardwarePropertyDevices,
 931                                     &i_param_size, p_devices );
 932     if( err != noErr )
 933     {
 934         msg_Err( p_aout, "could not get the device IDs: [%4.4s]", (char *)&err );
 935         goto error;
 936     }
 937
 938     /* Find the ID of the default Device */
 939     i_param_size = sizeof( AudioDeviceID );
 940     err = AudioHardwareGetProperty( kAudioHardwarePropertyDefaultOutputDevice,
 941                                     &i_param_size, &devid_def );
 942     if( err != noErr )
 943     {
 944         msg_Err( p_aout, "could not get default audio device: [%4.4s]", (char *)&err );
 945         goto error;
 946     }
 947     p_sys->i_default_dev = devid_def;
 948
 949     var_Create( p_aout, "audio-device", VLC_VAR_INTEGER|VLC_VAR_HASCHOICE );
 950     text.psz_string = _("Audio Device");
 951     var_Change( p_aout, "audio-device", VLC_VAR_SETTEXT, &text, NULL );
 952
 953     for( i = 0; i < p_sys->i_devices; i++ )
 954     {
 955         char *psz_name;
 956         i_param_size = 0;
 957
 958         /* Retrieve the length of the device name */
 959         err = AudioDeviceGetPropertyInfo(
 960                     p_devices[i], 0, VLC_FALSE,
 961                     kAudioDevicePropertyDeviceName,
 962                     &i_param_size, NULL);
 963         if( err ) goto error;
 964
 965         /* Retrieve the name of the device */
 966         psz_name = (char *)malloc( i_param_size );
 967         err = AudioDeviceGetProperty(
 968                     p_devices[i], 0, VLC_FALSE,
 969                     kAudioDevicePropertyDeviceName,
 970                     &i_param_size, psz_name);
 971         if( err ) goto error;
 972
 973         msg_Dbg( p_aout, "DevID: %#lx DevName: %s", p_devices[i], psz_name );
 974
 975         if( !AudioDeviceHasOutput( p_devices[i]) )
 976         {
 977             msg_Dbg( p_aout, "this device is INPUT only. skipping..." );
 978             continue;
 979         }
 980
 981         /* Add the menu entries */
 982         val.i_int = (int)p_devices[i];
 983         text.psz_string = strdup( psz_name );
 984         var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
 985         if( p_sys->i_default_dev == p_devices[i] )
 986         {
 987             /* The default device is the selected device normally */
 988             var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
 989             var_Set( p_aout, "audio-device", val );
 990         }
 991
 992         if( AudioDeviceSupportsDigital( p_aout, p_devices[i] ) )
 993         {
 994             val.i_int = (int)p_devices[i] | AOUT_VAR_SPDIF_FLAG;
 995             asprintf( &text.psz_string, _("%s (Encoded Output)"), psz_name );
 996             var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
 997             if( p_sys->i_default_dev == p_devices[i] && config_GetInt( p_aout, "spdif" ) )
 998             {
 999                 /* I we selected to prefer SPDIF output if available
1000                  * then this "dummy" entry should be selected */
1001                 var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
1002                 var_Set( p_aout, "audio-device", val );
1003             }
1004         }
1005
1006         free( psz_name);
1007     }
1008
1009     /* If a device is already "preselected", then use this device */
1010     var_Get( p_aout->p_vlc, "macosx-audio-device", &val );
1011     if( val.i_int > 0 )
1012     {
1013         var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
1014         var_Set( p_aout, "audio-device", val );
1015     }
1016
1017     /* If we change the device we want to use, we should renegotiate the audio chain */
1018     var_AddCallback( p_aout, "audio-device", AudioDeviceCallback, NULL );
1019
1020     /* Attach a Listener so that we are notified of a change in the Device setup */
1021     err = AudioHardwareAddPropertyListener( kAudioHardwarePropertyDevices,
1022                                             HardwareListener,
1023                                             (void *)p_aout );
1024     if( err )
1025         goto error;
1026
1027     if( p_devices ) free( p_devices );
1028     return;
1029
1030 error:
1031     var_Destroy( p_aout, "audio-device" );
1032     if( p_devices ) free( p_devices );
1033     return;
1034 }
1035
1036 /*****************************************************************************
1037  * AudioDeviceHasOutput: Checks if the Device actually provides any outputs at all
1038  *****************************************************************************/
1039 static int AudioDeviceHasOutput( AudioDeviceID i_dev_id )
1040 {
1041     UInt32                      dataSize;
1042     Boolean                     isWritable;
1043
1044     verify_noerr( AudioDeviceGetPropertyInfo( i_dev_id, 0, FALSE, kAudioDevicePropertyStreams, &dataSize, &isWritable) );
1045     if (dataSize == 0) return FALSE;
1046
1047     return TRUE;
1048 }
1049
1050 /*****************************************************************************
1051  * AudioDeviceSupportsDigital: Check i_dev_id for digital stream support.
1052  *****************************************************************************/
1053 static int AudioDeviceSupportsDigital( aout_instance_t *p_aout, AudioDeviceID i_dev_id )
1054 {
1055     OSStatus                    err = noErr;
1056     UInt32                      i_param_size = 0;
1057     AudioStreamID               *p_streams = NULL;
1058     int                         i = 0, i_streams = 0;
1059     vlc_bool_t                  b_return = VLC_FALSE;
1060
1061     /* Retrieve all the output streams */
1062     err = AudioDeviceGetPropertyInfo( i_dev_id, 0, FALSE,
1063                                       kAudioDevicePropertyStreams,
1064                                       &i_param_size, NULL );
1065     if( err != noErr )
1066     {
1067         msg_Err( p_aout, "could not get number of streams: [%4.4s]", (char *)&err );
1068         return VLC_FALSE;
1069     }
1070
1071     i_streams = i_param_size / sizeof( AudioStreamID );
1072     p_streams = (AudioStreamID *)malloc( i_param_size );
1073     if( p_streams == NULL )
1074     {
1075         msg_Err( p_aout, "Out of memory" );
1076         return VLC_ENOMEM;
1077     }
1078
1079     err = AudioDeviceGetProperty( i_dev_id, 0, FALSE,
1080                                     kAudioDevicePropertyStreams,
1081                                     &i_param_size, p_streams );
1082
1083     if( err != noErr )
1084     {
1085         msg_Err( p_aout, "could not get number of streams: [%4.4s]", (char *)&err );
1086         return VLC_FALSE;
1087     }
1088
1089     for( i = 0; i < i_streams; i++ )
1090     {
1091         if( AudioStreamSupportsDigital( p_aout, p_streams[i] ) )
1092             b_return = VLC_TRUE;
1093     }
1094
1095     if( p_streams ) free( p_streams );
1096     return b_return;
1097 }
1098
1099 /*****************************************************************************
1100  * AudioStreamSupportsDigital: Check i_stream_id for digital stream support.
1101  *****************************************************************************/
1102 static int AudioStreamSupportsDigital( aout_instance_t *p_aout, AudioStreamID i_stream_id )
1103 {
1104     OSStatus                    err = noErr;
1105     UInt32                      i_param_size = 0;
1106     AudioStreamBasicDescription *p_format_list = NULL;
1107     int                         i = 0, i_formats = 0;
1108     vlc_bool_t                  b_return = VLC_FALSE;
1109
1110     /* Retrieve all the stream formats supported by each output stream */
1111     err = AudioStreamGetPropertyInfo( i_stream_id, 0,
1112                                       kAudioStreamPropertyPhysicalFormats,
1113                                       &i_param_size, NULL );
1114     if( err != noErr )
1115     {
1116         msg_Err( p_aout, "could not get number of streamformats: [%4.4s]", (char *)&err );
1117         return VLC_FALSE;
1118     }
1119
1120     i_formats = i_param_size / sizeof( AudioStreamBasicDescription );
1121     p_format_list = (AudioStreamBasicDescription *)malloc( i_param_size );
1122     if( p_format_list == NULL )
1123     {
1124         msg_Err( p_aout, "could not malloc the memory" );
1125         return VLC_FALSE;
1126     }
1127
1128     err = AudioStreamGetProperty( i_stream_id, 0,
1129                                       kAudioStreamPropertyPhysicalFormats,
1130                                       &i_param_size, p_format_list );
1131     if( err != noErr )
1132     {
1133         msg_Err( p_aout, "could not get the list of streamformats: [%4.4s]", (char *)&err );
1134         free( p_format_list);
1135         p_format_list = NULL;
1136         return VLC_FALSE;
1137     }
1138
1139     for( i = 0; i < i_formats; i++ )
1140     {
1141         msg_Dbg( p_aout, STREAM_FORMAT_MSG( "supported format: ", p_format_list[i] ) );
1142
1143         if( p_format_list[i].mFormatID == 'IAC3' ||
1144                   p_format_list[i].mFormatID == kAudioFormat60958AC3 )
1145         {
1146             b_return = VLC_TRUE;
1147         }
1148     }
1149
1150     if( p_format_list ) free( p_format_list );
1151     return b_return;
1152 }
1153
1154 /*****************************************************************************
1155  * AudioStreamChangeFormat: Change i_stream_id to change_format
1156  *****************************************************************************/
1157 static int AudioStreamChangeFormat( aout_instance_t *p_aout, AudioStreamID i_stream_id, AudioStreamBasicDescription change_format )
1158 {
1159     OSStatus            err = noErr;
1160     UInt32              i_param_size = 0;
1161     int i;
1162
1163     struct timeval now;
1164     struct timespec timeout;
1165     struct { vlc_mutex_t lock; vlc_cond_t cond; } w;
1166
1167     msg_Dbg( p_aout, STREAM_FORMAT_MSG( "setting stream format: ", change_format ) );
1168
1169     /* Condition because SetProperty is asynchronious */
1170     vlc_cond_init( p_aout, &w.cond );
1171     vlc_mutex_init( p_aout, &w.lock );
1172     vlc_mutex_lock( &w.lock );
1173
1174     /* Install the callback */
1175     err = AudioStreamAddPropertyListener( i_stream_id, 0,
1176                                       kAudioStreamPropertyPhysicalFormat,
1177                                       StreamListener, (void *)&w );
1178     if( err != noErr )
1179     {
1180         msg_Err( p_aout, "AudioStreamAddPropertyListener failed: [%4.4s]", (char *)&err );
1181         return VLC_FALSE;
1182     }
1183
1184     /* change the format */
1185     err = AudioStreamSetProperty( i_stream_id, 0, 0,
1186                                   kAudioStreamPropertyPhysicalFormat,
1187                                   sizeof( AudioStreamBasicDescription ),
1188                                   &change_format );
1189     if( err != noErr )
1190     {
1191         msg_Err( p_aout, "could not set the stream format: [%4.4s]", (char *)&err );
1192         return VLC_FALSE;
1193     }
1194
1195     /* The AudioStreamSetProperty is not only asynchronious (requiring the locks)
1196      * it is also not Atomic, in it's behaviour.
1197      * Therefore we check 5 times before we really give up.
1198      * FIXME: failing isn't actually implemented yet. */
1199     for( i = 0; i < 5; i++ )
1200     {
1201         AudioStreamBasicDescription actual_format;
1202
1203         gettimeofday( &now, NULL );
1204         timeout.tv_sec = now.tv_sec;
1205         timeout.tv_nsec = (now.tv_usec + 500000) * 1000;
1206
1207         if( pthread_cond_timedwait( &w.cond.cond, &w.lock.mutex, &timeout ) )
1208         {
1209             msg_Dbg( p_aout, "reached timeout" );
1210         }
1211
1212         i_param_size = sizeof( AudioStreamBasicDescription );
1213         err = AudioStreamGetProperty( i_stream_id, 0,
1214                                       kAudioStreamPropertyPhysicalFormat,
1215                                       &i_param_size,
1216                                       &actual_format );
1217
1218         msg_Dbg( p_aout, STREAM_FORMAT_MSG( "actual format in use: ", actual_format ) );
1219         if( actual_format.mSampleRate == change_format.mSampleRate &&
1220             actual_format.mFormatID == change_format.mFormatID &&
1221             actual_format.mFramesPerPacket == change_format.mFramesPerPacket )
1222         {
1223             /* The right format is now active */
1224             break;
1225         }
1226         /* We need to check again */
1227     }
1228
1229     /* Removing the property listener */
1230     err = AudioStreamRemovePropertyListener( i_stream_id, 0,
1231                                             kAudioStreamPropertyPhysicalFormat,
1232                                             StreamListener );
1233     if( err != noErr )
1234     {
1235         msg_Err( p_aout, "AudioStreamRemovePropertyListener failed: [%4.4s]", (char *)&err );
1236         return VLC_FALSE;
1237     }
1238
1239     /* Destroy the lock and condition */
1240     vlc_mutex_unlock( &w.lock );
1241     vlc_mutex_destroy( &w.lock );
1242     vlc_cond_destroy( &w.cond );
1243
1244     return VLC_TRUE;
1245 }
1246
1247 /*****************************************************************************
1248  * RenderCallbackAnalog: This function is called everytime the AudioUnit wants
1249  * us to provide some more audio data.
1250  * Don't print anything during normal playback, calling blocking function from
1251  * this callback is not allowed.
1252  *****************************************************************************/
1253 static OSStatus RenderCallbackAnalog( vlc_object_t *_p_aout,
1254                                       AudioUnitRenderActionFlags *ioActionFlags,
1255                                       const AudioTimeStamp *inTimeStamp,
1256                                       unsigned int inBusNummer,
1257                                       unsigned int inNumberFrames,
1258                                       AudioBufferList *ioData )
1259 {
1260     AudioTimeStamp  host_time;
1261     mtime_t         current_date = 0;
1262     uint32_t        i_mData_bytes = 0;
1263
1264     aout_instance_t * p_aout = (aout_instance_t *)_p_aout;
1265     struct aout_sys_t * p_sys = p_aout->output.p_sys;
1266
1267     host_time.mFlags = kAudioTimeStampHostTimeValid;
1268     AudioDeviceTranslateTime( p_sys->i_selected_dev, inTimeStamp, &host_time );
1269
1270     /* Check for the difference between the Device clock and mdate */
1271     p_sys->clock_diff = - (mtime_t)
1272         AudioConvertHostTimeToNanos( AudioGetCurrentHostTime() ) / 1000;
1273     p_sys->clock_diff += mdate();
1274
1275     current_date = p_sys->clock_diff +
1276                    AudioConvertHostTimeToNanos( host_time.mHostTime ) / 1000;
1277                    //- ((mtime_t) 1000000 / p_aout->output.output.i_rate * 31 ); // 31 = Latency in Frames. retrieve somewhere
1278
1279     if( ioData == NULL && ioData->mNumberBuffers < 1 )
1280     {
1281         msg_Err( p_aout, "no iodata or buffers");
1282         return 0;
1283     }
1284     if( ioData->mNumberBuffers > 1 )
1285         msg_Err( p_aout, "well this is weird. seems like there is more than one buffer..." );
1286
1287
1288     if( p_sys->i_total_bytes > 0 )
1289     {
1290         i_mData_bytes = __MIN( p_sys->i_total_bytes - p_sys->i_read_bytes, ioData->mBuffers[0].mDataByteSize );
1291         p_aout->p_vlc->pf_memcpy( ioData->mBuffers[0].mData, &p_sys->p_remainder_buffer[p_sys->i_read_bytes], i_mData_bytes );
1292         p_sys->i_read_bytes += i_mData_bytes;
1293         current_date += (mtime_t) ( (mtime_t) 1000000 / p_aout->output.output.i_rate ) *
1294                         ( i_mData_bytes / 4 / aout_FormatNbChannels( &p_aout->output.output )  ); // 4 is fl32 specific
1295
1296         if( p_sys->i_read_bytes >= p_sys->i_total_bytes )
1297             p_sys->i_read_bytes = p_sys->i_total_bytes = 0;
1298     }
1299
1300     while( i_mData_bytes < ioData->mBuffers[0].mDataByteSize )
1301     {
1302         /* We don't have enough data yet */
1303         aout_buffer_t * p_buffer;
1304         p_buffer = aout_OutputNextBuffer( p_aout, current_date , VLC_FALSE );
1305
1306         if( p_buffer != NULL )
1307         {
1308             uint32_t i_second_mData_bytes = __MIN( p_buffer->i_nb_bytes, ioData->mBuffers[0].mDataByteSize - i_mData_bytes );
1309
1310             p_aout->p_vlc->pf_memcpy( (uint8_t *)ioData->mBuffers[0].mData + i_mData_bytes, p_buffer->p_buffer, i_second_mData_bytes );
1311             i_mData_bytes += i_second_mData_bytes;
1312
1313             if( i_mData_bytes >= ioData->mBuffers[0].mDataByteSize )
1314             {
1315                 p_sys->i_total_bytes = p_buffer->i_nb_bytes - i_second_mData_bytes;
1316                 p_aout->p_vlc->pf_memcpy( p_sys->p_remainder_buffer, &p_buffer->p_buffer[i_second_mData_bytes], p_sys->i_total_bytes );
1317             }
1318             else
1319             {
1320                 /* update current_date */
1321                 current_date += (mtime_t) ( (mtime_t) 1000000 / p_aout->output.output.i_rate ) *
1322                                 ( i_second_mData_bytes / 4 / aout_FormatNbChannels( &p_aout->output.output )  ); // 4 is fl32 specific
1323             }
1324             aout_BufferFree( p_buffer );
1325         }
1326         else
1327         {
1328              p_aout->p_vlc->pf_memset( (uint8_t *)ioData->mBuffers[0].mData +i_mData_bytes, 0, ioData->mBuffers[0].mDataByteSize - i_mData_bytes );
1329              i_mData_bytes += ioData->mBuffers[0].mDataByteSize - i_mData_bytes;
1330         }
1331     }
1332     return( noErr );
1333 }
1334
1335 /*****************************************************************************
1336  * RenderCallbackSPDIF: callback for SPDIF audio output
1337  *****************************************************************************/
1338 static OSStatus RenderCallbackSPDIF( AudioDeviceID inDevice,
1339                                     const AudioTimeStamp * inNow,
1340                                     const void * inInputData,
1341                                     const AudioTimeStamp * inInputTime,
1342                                     AudioBufferList * outOutputData,
1343                                     const AudioTimeStamp * inOutputTime,
1344                                     void * threadGlobals )
1345 {
1346     aout_buffer_t * p_buffer;
1347     mtime_t         current_date;
1348
1349     aout_instance_t * p_aout = (aout_instance_t *)threadGlobals;
1350     struct aout_sys_t * p_sys = p_aout->output.p_sys;
1351
1352     /* Check for the difference between the Device clock and mdate */
1353     p_sys->clock_diff = - (mtime_t)
1354         AudioConvertHostTimeToNanos( inNow->mHostTime ) / 1000;
1355     p_sys->clock_diff += mdate();
1356
1357     current_date = p_sys->clock_diff +
1358                    AudioConvertHostTimeToNanos( inOutputTime->mHostTime ) / 1000;
1359                    //- ((mtime_t) 1000000 / p_aout->output.output.i_rate * 31 ); // 31 = Latency in Frames. retrieve somewhere
1360
1361     p_buffer = aout_OutputNextBuffer( p_aout, current_date, VLC_TRUE );
1362
1363 #define BUFFER outOutputData->mBuffers[p_sys->i_stream_index]
1364     if( p_buffer != NULL )
1365     {
1366         if( (int)BUFFER.mDataByteSize != (int)p_buffer->i_nb_bytes)
1367             msg_Warn( p_aout, "bytesize: %d nb_bytes: %d", (int)BUFFER.mDataByteSize, (int)p_buffer->i_nb_bytes );
1368
1369         /* move data into output data buffer */
1370         p_aout->p_vlc->pf_memcpy( BUFFER.mData,
1371                                   p_buffer->p_buffer, p_buffer->i_nb_bytes );
1372         aout_BufferFree( p_buffer );
1373     }
1374     else
1375     {
1376         p_aout->p_vlc->pf_memset( BUFFER.mData, 0, BUFFER.mDataByteSize );
1377     }
1378 #undef BUFFER
1379
1380     return( noErr );
1381 }
1382
1383 /*****************************************************************************
1384  * HardwareListener: Warns us of changes in the list of registered devices
1385  *****************************************************************************/
1386 static OSStatus HardwareListener( AudioHardwarePropertyID inPropertyID,
1387                                   void * inClientData )
1388 {
1389     OSStatus err = noErr;
1390     aout_instance_t     *p_aout = (aout_instance_t *)inClientData;
1391
1392     switch( inPropertyID )
1393     {
1394         case kAudioHardwarePropertyDevices:
1395         {
1396             /* something changed in the list of devices */
1397             /* We trigger the audio-device's aout_ChannelsRestart callback */
1398             var_Change( p_aout, "audio-device", VLC_VAR_TRIGGER_CALLBACKS, NULL, NULL );
1399             var_Destroy( p_aout, "audio-device" );
1400         }
1401         break;
1402     }
1403
1404     return( err );
1405 }
1406
1407 /*****************************************************************************
1408  * StreamListener
1409  *****************************************************************************/
1410 static OSStatus StreamListener( AudioStreamID inStream,
1411                                 UInt32 inChannel,
1412                                 AudioDevicePropertyID inPropertyID,
1413                                 void * inClientData )
1414 {
1415     OSStatus err = noErr;
1416     struct { vlc_mutex_t lock; vlc_cond_t cond; } * w = inClientData;
1417
1418     switch( inPropertyID )
1419     {
1420         case kAudioStreamPropertyPhysicalFormat:
1421             vlc_mutex_lock( &w->lock );
1422             vlc_cond_signal( &w->cond );
1423             vlc_mutex_unlock( &w->lock );
1424             break;
1425
1426         default:
1427             break;
1428     }
1429     return( err );
1430 }
1431
1432 /*****************************************************************************
1433  * AudioDeviceCallback: Callback triggered when the audio-device variable is changed
1434  *****************************************************************************/
1435 static int AudioDeviceCallback( vlc_object_t *p_this, const char *psz_variable,
1436                      vlc_value_t old_val, vlc_value_t new_val, void *param )
1437 {
1438     aout_instance_t *p_aout = (aout_instance_t *)p_this;
1439     var_Set( p_aout->p_vlc, "macosx-audio-device", new_val );
1440     msg_Dbg( p_aout, "Set Device: %#x", new_val.i_int );
1441     return aout_ChannelsRestart( p_this, psz_variable, old_val, new_val, param );
1442 }
1443