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 <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         /* This is not a fatal error. Some drivers simply don't support this property */
 235         msg_Warn( p_aout, "could not check whether device is hogged: %4.4s",
 236                  (char *)&err );
 237         p_sys->i_hog_pid = -1;
 238     }
 239
 240     if( p_sys->i_hog_pid != -1 && p_sys->i_hog_pid != getpid() )
 241     {
 242         msg_Err( p_aout, "Selected audio device is exclusively in use by another program." );
 243         goto error;
 244     }
 245
 246     /* Check for Digital mode or Analog output mode */
 247     if( AOUT_FMT_NON_LINEAR( &p_aout->output.output ) && p_sys->b_supports_digital )
 248     {
 249         if( OpenSPDIF( p_aout ) )
 250             return VLC_SUCCESS;
 251     }
 252     else
 253     {
 254         if( OpenAnalog( p_aout ) )
 255             return VLC_SUCCESS;
 256     }
 257
 258 error:
 259     /* If we reach this, this aout has failed */
 260     var_Destroy( p_aout, "audio-device" );
 261     if( p_sys ) free( p_sys );
 262     return VLC_EGENERIC;
 263 }
 264
 265 /*****************************************************************************
 266  * Open: open and setup a HAL AudioUnit to do analog (multichannel) audio output
 267  *****************************************************************************/
 268 static int OpenAnalog( aout_instance_t *p_aout )
 269 {
 270     struct aout_sys_t           *p_sys = p_aout->output.p_sys;
 271     OSStatus                    err = noErr;
 272     UInt32                      i_param_size = 0, i = 0;
 273     int                         i_original;
 274     ComponentDescription        desc;
 275     AudioStreamBasicDescription DeviceFormat;
 276     AudioChannelLayout          *layout;
 277     AudioChannelLayout          new_layout;
 278     AURenderCallbackStruct      input;
 279
 280     /* Lets go find our Component */
 281     desc.componentType = kAudioUnitType_Output;
 282     desc.componentSubType = kAudioUnitSubType_HALOutput;
 283     desc.componentManufacturer = kAudioUnitManufacturer_Apple;
 284     desc.componentFlags = 0;
 285     desc.componentFlagsMask = 0;
 286
 287     p_sys->au_component = FindNextComponent( NULL, &desc );
 288     if( p_sys->au_component == NULL )
 289     {
 290         msg_Warn( p_aout, "we cannot find our HAL component" );
 291         return VLC_FALSE;
 292     }
 293
 294     err = OpenAComponent( p_sys->au_component, &p_sys->au_unit );
 295     if( err != noErr )
 296     {
 297         msg_Warn( p_aout, "we cannot open our HAL component" );
 298         return VLC_FALSE;
 299     }
 300
 301     /* Set the device we will use for this output unit */
 302     err = AudioUnitSetProperty( p_sys->au_unit,
 303                          kAudioOutputUnitProperty_CurrentDevice,
 304                          kAudioUnitScope_Global,
 305                          0,
 306                          &p_sys->i_selected_dev,
 307                          sizeof( AudioDeviceID ));
 308
 309     if( err != noErr )
 310     {
 311         msg_Warn( p_aout, "we cannot select the audio device" );
 312         return VLC_FALSE;
 313     }
 314
 315     /* Get the current format */
 316     i_param_size = sizeof(AudioStreamBasicDescription);
 317
 318     err = AudioUnitGetProperty( p_sys->au_unit,
 319                                    kAudioUnitProperty_StreamFormat,
 320                                    kAudioUnitScope_Input,
 321                                    0,
 322                                    &DeviceFormat,
 323                                    &i_param_size );
 324
 325     if( err != noErr ) return VLC_FALSE;
 326     else msg_Dbg( p_aout, STREAM_FORMAT_MSG( "current format is: ", DeviceFormat ) );
 327
 328     /* Get the channel layout of the device side of the unit (vlc -> unit -> device) */
 329     err = AudioUnitGetPropertyInfo( p_sys->au_unit,
 330                                    kAudioDevicePropertyPreferredChannelLayout,
 331                                    kAudioUnitScope_Output,
 332                                    0,
 333                                    &i_param_size,
 334                                    NULL );
 335
 336     if( err == noErr )
 337     {
 338         layout = (AudioChannelLayout *)malloc( i_param_size);
 339
 340         verify_noerr( AudioUnitGetProperty( p_sys->au_unit,
 341                                        kAudioDevicePropertyPreferredChannelLayout,
 342                                        kAudioUnitScope_Output,
 343                                        0,
 344                                        layout,
 345                                        &i_param_size ));
 346
 347         /* We need to "fill out" the ChannelLayout, because there are multiple ways that it can be set */
 348         if( layout->mChannelLayoutTag == kAudioChannelLayoutTag_UseChannelBitmap)
 349         {
 350             /* bitmap defined channellayout */
 351             verify_noerr( AudioFormatGetProperty( kAudioFormatProperty_ChannelLayoutForBitmap,
 352                                     sizeof( UInt32), &layout->mChannelBitmap,
 353                                     &i_param_size,
 354                                     layout ));
 355         }
 356         else if( layout->mChannelLayoutTag != kAudioChannelLayoutTag_UseChannelDescriptions )
 357         {
 358             /* layouttags defined channellayout */
 359             verify_noerr( AudioFormatGetProperty( kAudioFormatProperty_ChannelLayoutForTag,
 360                                     sizeof( AudioChannelLayoutTag ), &layout->mChannelLayoutTag,
 361                                     &i_param_size,
 362                                     layout ));
 363         }
 364
 365         msg_Dbg( p_aout, "layout of AUHAL has %d channels" , (int)layout->mNumberChannelDescriptions );
 366
 367         /* Initialize the VLC core channel count */
 368         p_aout->output.output.i_physical_channels = 0;
 369         i_original = p_aout->output.output.i_original_channels & AOUT_CHAN_PHYSMASK;
 370
 371         if( i_original == AOUT_CHAN_CENTER || layout->mNumberChannelDescriptions < 2 )
 372         {
 373             /* We only need Mono or cannot output more than 1 channel */
 374             p_aout->output.output.i_physical_channels = AOUT_CHAN_CENTER;
 375         }
 376         else if( i_original == (AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT) || layout->mNumberChannelDescriptions < 3 )
 377         {
 378             /* We only need Stereo or cannot output more than 2 channels */
 379             p_aout->output.output.i_physical_channels = AOUT_CHAN_RIGHT | AOUT_CHAN_LEFT;
 380         }
 381         else
 382         {
 383             /* We want more than stereo and we can do that */
 384             for( i = 0; i < layout->mNumberChannelDescriptions; i++ )
 385             {
 386                 msg_Dbg( p_aout, "this is channel: %d", (int)layout->mChannelDescriptions[i].mChannelLabel );
 387
 388                 switch( layout->mChannelDescriptions[i].mChannelLabel )
 389                 {
 390                     case kAudioChannelLabel_Left:
 391                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_LEFT;
 392                         continue;
 393                     case kAudioChannelLabel_Right:
 394                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_RIGHT;
 395                         continue;
 396                     case kAudioChannelLabel_Center:
 397                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_CENTER;
 398                         continue;
 399                     case kAudioChannelLabel_LFEScreen:
 400                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_LFE;
 401                         continue;
 402                     case kAudioChannelLabel_LeftSurround:
 403                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_REARLEFT;
 404                         continue;
 405                     case kAudioChannelLabel_RightSurround:
 406                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_REARRIGHT;
 407                         continue;
 408                     case kAudioChannelLabel_RearSurroundLeft:
 409                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_MIDDLELEFT;
 410                         continue;
 411                     case kAudioChannelLabel_RearSurroundRight:
 412                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_MIDDLERIGHT;
 413                         continue;
 414                     case kAudioChannelLabel_CenterSurround:
 415                         p_aout->output.output.i_physical_channels |= AOUT_CHAN_REARCENTER;
 416                         continue;
 417                     default:
 418                         msg_Warn( p_aout, "unrecognized channel form provided by driver: %d", (int)layout->mChannelDescriptions[i].mChannelLabel );
 419                 }
 420             }
 421             if( p_aout->output.output.i_physical_channels == 0 )
 422             {
 423                 p_aout->output.output.i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
 424                 msg_Err( p_aout, "You should configure your speaker layout with Audio Midi Setup Utility in /Applications/Utilities. Now using Stereo mode." );
 425             }
 426         }
 427         if( layout ) free( layout );
 428     }
 429     else
 430     {
 431         msg_Warn( p_aout, "this driver does not support kAudioDevicePropertyPreferredChannelLayout. BAD DRIVER AUTHOR !!!" );
 432         p_aout->output.output.i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
 433     }
 434
 435     msg_Dbg( p_aout, "selected %d physical channels for device output", aout_FormatNbChannels( &p_aout->output.output ) );
 436     msg_Dbg( p_aout, "VLC will output: %s", aout_FormatPrintChannels( &p_aout->output.output ));
 437
 438     memset (&new_layout, 0, sizeof(new_layout));
 439     switch( aout_FormatNbChannels( &p_aout->output.output ) )
 440     {
 441         case 1:
 442             new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_Mono;
 443             break;
 444         case 2:
 445             new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_Stereo;
 446             break;
 447         case 3:
 448             if( p_aout->output.output.i_physical_channels & AOUT_CHAN_CENTER )
 449             {
 450                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_7; // L R C
 451             }
 452             else if( p_aout->output.output.i_physical_channels & AOUT_CHAN_LFE )
 453             {
 454                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_4; // L R LFE
 455             }
 456             break;
 457         case 4:
 458             if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_CENTER | AOUT_CHAN_LFE ) )
 459             {
 460                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_10; // L R C LFE
 461             }
 462             else if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT ) )
 463             {
 464                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_3; // L R Ls Rs
 465             }
 466             else if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_CENTER | AOUT_CHAN_REARCENTER ) )
 467             {
 468                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_3; // L R C Cs
 469             }
 470             break;
 471         case 5:
 472             if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_CENTER ) )
 473             {
 474                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_19; // L R Ls Rs C
 475             }
 476             else if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_LFE ) )
 477             {
 478                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_18; // L R Ls Rs LFE
 479             }
 480             break;
 481         case 6:
 482             if( p_aout->output.output.i_physical_channels & ( AOUT_CHAN_LFE ) )
 483             {
 484                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_DVD_20; // L R Ls Rs C LFE
 485             }
 486             else
 487             {
 488                 new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_AudioUnit_6_0; // L R Ls Rs C Cs
 489             }
 490             break;
 491         case 7:
 492             /* FIXME: This is incorrect. VLC uses the internal ordering: L R Lm Rm Lr Rr C LFE but this is wrong */
 493             new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_MPEG_6_1_A; // L R C LFE Ls Rs Cs
 494             break;
 495         case 8:
 496             /* FIXME: This is incorrect. VLC uses the internal ordering: L R Lm Rm Lr Rr C LFE but this is wrong */
 497             new_layout.mChannelLayoutTag = kAudioChannelLayoutTag_MPEG_7_1_A; // L R C LFE Ls Rs Lc Rc
 498             break;
 499     }
 500
 501     /* Set up the format to be used */
 502     DeviceFormat.mSampleRate = p_aout->output.output.i_rate;
 503     DeviceFormat.mFormatID = kAudioFormatLinearPCM;
 504
 505     /* We use float 32. It's the best supported format by both VLC and Coreaudio */
 506     p_aout->output.output.i_format = VLC_FOURCC( 'f','l','3','2');
 507     DeviceFormat.mFormatFlags = kAudioFormatFlagsNativeFloatPacked;
 508     DeviceFormat.mBitsPerChannel = 32;
 509     DeviceFormat.mChannelsPerFrame = aout_FormatNbChannels( &p_aout->output.output );
 510
 511     /* Calculate framesizes and stuff */
 512     DeviceFormat.mFramesPerPacket = 1;
 513     DeviceFormat.mBytesPerFrame = DeviceFormat.mBitsPerChannel * DeviceFormat.mChannelsPerFrame / 8;
 514     DeviceFormat.mBytesPerPacket = DeviceFormat.mBytesPerFrame * DeviceFormat.mFramesPerPacket;
 515
 516     /* Set the desired format */
 517     i_param_size = sizeof(AudioStreamBasicDescription);
 518     verify_noerr( AudioUnitSetProperty( p_sys->au_unit,
 519                                    kAudioUnitProperty_StreamFormat,
 520                                    kAudioUnitScope_Input,
 521                                    0,
 522                                    &DeviceFormat,
 523                                    i_param_size ));
 524
 525     msg_Dbg( p_aout, STREAM_FORMAT_MSG( "we set the AU format: " , DeviceFormat ) );
 526
 527     /* Retrieve actual format */
 528     verify_noerr( AudioUnitGetProperty( 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( "the actual set AU format is " , DeviceFormat ) );
 536
 537     /* Do the last VLC aout setups */
 538     aout_FormatPrepare( &p_aout->output.output );
 539     p_aout->output.i_nb_samples = 2048;
 540     aout_VolumeSoftInit( p_aout );
 541
 542     /* set the IOproc callback */
 543     input.inputProc = (AURenderCallback) RenderCallbackAnalog;
 544     input.inputProcRefCon = p_aout;
 545
 546     verify_noerr( AudioUnitSetProperty( p_sys->au_unit,
 547                             kAudioUnitProperty_SetRenderCallback,
 548                             kAudioUnitScope_Input,
 549                             0, &input, sizeof( input ) ) );
 550
 551     input.inputProc = (AURenderCallback) RenderCallbackAnalog;
 552     input.inputProcRefCon = p_aout;
 553
 554     /* Set the new_layout as the layout VLC will use to feed the AU unit */
 555     verify_noerr( AudioUnitSetProperty( p_sys->au_unit,
 556                             kAudioUnitProperty_AudioChannelLayout,
 557                             kAudioUnitScope_Input,
 558                             0, &new_layout, sizeof(new_layout) ) );
 559
 560     if( new_layout.mNumberChannelDescriptions > 0 )
 561         free( new_layout.mChannelDescriptions );
 562
 563     /* AU initiliaze */
 564     verify_noerr( AudioUnitInitialize(p_sys->au_unit) );
 565
 566     /* Find the difference between device clock and mdate clock */
 567     p_sys->clock_diff = - (mtime_t)
 568         AudioConvertHostTimeToNanos( AudioGetCurrentHostTime() ) / 1000;
 569     p_sys->clock_diff += mdate();
 570
 571     /* Start the AU */
 572     verify_noerr( AudioOutputUnitStart(p_sys->au_unit) );
 573
 574     return VLC_TRUE;
 575 }
 576
 577 /*****************************************************************************
 578  * Setup a encoded digital stream (SPDIF)
 579  *****************************************************************************/
 580 static int OpenSPDIF( aout_instance_t * p_aout )
 581 {
 582     struct aout_sys_t       *p_sys = p_aout->output.p_sys;
 583     OSStatus                err = noErr;
 584     UInt32                  i_param_size = 0, b_mix = 0;
 585     Boolean                 b_writeable = VLC_FALSE;
 586     AudioStreamID           *p_streams = NULL;
 587     int                     i = 0, i_streams = 0;
 588
 589     /* Start doing the SPDIF setup proces */
 590     p_sys->b_digital = VLC_TRUE;
 591
 592     /* Hog the device */
 593     i_param_size = sizeof( p_sys->i_hog_pid );
 594     p_sys->i_hog_pid = getpid() ;
 595
 596     err = AudioDeviceSetProperty( p_sys->i_selected_dev, 0, 0, FALSE,
 597                                   kAudioDevicePropertyHogMode, i_param_size, &p_sys->i_hog_pid );
 598
 599     if( err != noErr )
 600     {
 601         msg_Err( p_aout, "failed to set hogmode: [%4.4s]", (char *)&err );
 602         return VLC_FALSE;
 603     }
 604
 605     /* Set mixable to false if we are allowed to */
 606     err = AudioDeviceGetPropertyInfo( p_sys->i_selected_dev, 0, FALSE, kAudioDevicePropertySupportsMixing,
 607                                     &i_param_size, &b_writeable );
 608
 609     err = AudioDeviceGetProperty( p_sys->i_selected_dev, 0, FALSE, kAudioDevicePropertySupportsMixing,
 610                                     &i_param_size, &b_mix );
 611
 612     if( !err && b_writeable )
 613     {
 614         b_mix = 0;
 615         err = AudioDeviceSetProperty( p_sys->i_selected_dev, 0, 0, FALSE,
 616                             kAudioDevicePropertySupportsMixing, i_param_size, &b_mix );
 617         p_sys->b_changed_mixing = VLC_TRUE;
 618     }
 619
 620     if( err != noErr )
 621     {
 622         msg_Err( p_aout, "failed to set mixmode: [%4.4s]", (char *)&err );
 623         return VLC_FALSE;
 624     }
 625
 626     /* Get a list of all the streams on this device */
 627     err = AudioDeviceGetPropertyInfo( p_sys->i_selected_dev, 0, FALSE,
 628                                       kAudioDevicePropertyStreams,
 629                                       &i_param_size, NULL );
 630     if( err != noErr )
 631     {
 632         msg_Err( p_aout, "could not get number of streams: [%4.4s]", (char *)&err );
 633         return VLC_FALSE;
 634     }
 635
 636     i_streams = i_param_size / sizeof( AudioStreamID );
 637     p_streams = (AudioStreamID *)malloc( i_param_size );
 638     if( p_streams == NULL )
 639     {
 640         msg_Err( p_aout, "out of memory" );
 641         return VLC_FALSE;
 642     }
 643
 644     err = AudioDeviceGetProperty( p_sys->i_selected_dev, 0, FALSE,
 645                                     kAudioDevicePropertyStreams,
 646                                     &i_param_size, p_streams );
 647
 648     if( err != noErr )
 649     {
 650         msg_Err( p_aout, "could not get number of streams: [%4.4s]", (char *)&err );
 651         if( p_streams ) free( p_streams );
 652         return VLC_FALSE;
 653     }
 654
 655     for( i = 0; i < i_streams && p_sys->i_stream_index < 0 ; i++ )
 656     {
 657         /* Find a stream with a cac3 stream */
 658         AudioStreamBasicDescription *p_format_list = NULL;
 659         int                         i_formats = 0, j = 0;
 660         vlc_bool_t                  b_digital = VLC_FALSE;
 661
 662         /* Retrieve all the stream formats supported by each output stream */
 663         err = AudioStreamGetPropertyInfo( p_streams[i], 0,
 664                                           kAudioStreamPropertyPhysicalFormats,
 665                                           &i_param_size, NULL );
 666         if( err != noErr )
 667         {
 668             msg_Err( p_aout, "could not get number of streamformats: [%4.4s]", (char *)&err );
 669             continue;
 670         }
 671
 672         i_formats = i_param_size / sizeof( AudioStreamBasicDescription );
 673         p_format_list = (AudioStreamBasicDescription *)malloc( i_param_size );
 674         if( p_format_list == NULL )
 675         {
 676             msg_Err( p_aout, "could not malloc the memory" );
 677             continue;
 678         }
 679
 680         err = AudioStreamGetProperty( p_streams[i], 0,
 681                                           kAudioStreamPropertyPhysicalFormats,
 682                                           &i_param_size, p_format_list );
 683         if( err != noErr )
 684         {
 685             msg_Err( p_aout, "could not get the list of streamformats: [%4.4s]", (char *)&err );
 686             if( p_format_list) free( p_format_list);
 687             continue;
 688         }
 689
 690         /* Check if one of the supported formats is a digital format */
 691         for( j = 0; j < i_formats; j++ )
 692         {
 693             if( p_format_list[j].mFormatID == 'IAC3' ||
 694                   p_format_list[j].mFormatID == kAudioFormat60958AC3 )
 695             {
 696                 b_digital = VLC_TRUE;
 697                 break;
 698             }
 699         }
 700
 701         if( b_digital )
 702         {
 703             /* if this stream supports a digital (cac3) format, then go set it. */
 704             int i_requested_rate_format = -1;
 705             int i_current_rate_format = -1;
 706             int i_backup_rate_format = -1;
 707
 708             p_sys->i_stream_id = p_streams[i];
 709             p_sys->i_stream_index = i;
 710
 711             if( p_sys->b_revert == VLC_FALSE )
 712             {
 713                 /* Retrieve the original format of this stream first if not done so already */
 714                 i_param_size = sizeof( p_sys->sfmt_revert );
 715                 err = AudioStreamGetProperty( p_sys->i_stream_id, 0,
 716                                               kAudioStreamPropertyPhysicalFormat,
 717                                               &i_param_size,
 718                                               &p_sys->sfmt_revert );
 719                 if( err != noErr )
 720                 {
 721                     msg_Err( p_aout, "could not retrieve the original streamformat: [%4.4s]", (char *)&err );
 722                     continue;
 723                 }
 724                 p_sys->b_revert = VLC_TRUE;
 725             }
 726
 727             for( j = 0; j < i_formats; j++ )
 728             {
 729                 if( p_format_list[j].mFormatID == 'IAC3' ||
 730                       p_format_list[j].mFormatID == kAudioFormat60958AC3 )
 731                 {
 732                     if( p_format_list[j].mSampleRate == p_aout->output.output.i_rate )
 733                     {
 734                         i_requested_rate_format = j;
 735                         break;
 736                     }
 737                     else if( p_format_list[j].mSampleRate == p_sys->sfmt_revert.mSampleRate )
 738                     {
 739                         i_current_rate_format = j;
 740                     }
 741                     else
 742                     {
 743                         if( i_backup_rate_format < 0 || p_format_list[j].mSampleRate > p_format_list[i_backup_rate_format].mSampleRate )
 744                             i_backup_rate_format = j;
 745                     }
 746                 }
 747
 748             }
 749
 750             if( i_requested_rate_format >= 0 ) /* We prefer to output at the samplerate of the original audio */
 751                 p_sys->stream_format = p_format_list[i_requested_rate_format];
 752             else if( i_current_rate_format >= 0 ) /* If not possible, we will try to use the current samplerate of the device */
 753                 p_sys->stream_format = p_format_list[i_current_rate_format];
 754             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) */
 755         }
 756         if( p_format_list ) free( p_format_list );
 757     }
 758     if( p_streams ) free( p_streams );
 759
 760     msg_Dbg( p_aout, STREAM_FORMAT_MSG( "original stream format: ", p_sys->sfmt_revert ) );
 761
 762     if( !AudioStreamChangeFormat( p_aout, p_sys->i_stream_id, p_sys->stream_format ) )
 763         return VLC_FALSE;
 764
 765     /* Set the format flags */
 766     if( p_sys->stream_format.mFormatFlags & kAudioFormatFlagIsBigEndian )
 767         p_aout->output.output.i_format = VLC_FOURCC('s','p','d','b');
 768     else
 769         p_aout->output.output.i_format = VLC_FOURCC('s','p','d','i');
 770     p_aout->output.output.i_bytes_per_frame = AOUT_SPDIF_SIZE;
 771     p_aout->output.output.i_frame_length = A52_FRAME_NB;
 772     p_aout->output.i_nb_samples = p_aout->output.output.i_frame_length;
 773     p_aout->output.output.i_rate = (unsigned int)p_sys->stream_format.mSampleRate;
 774     aout_FormatPrepare( &p_aout->output.output );
 775     aout_VolumeNoneInit( p_aout );
 776
 777     /* Add IOProc callback */
 778     err = AudioDeviceAddIOProc( p_sys->i_selected_dev,
 779                                 (AudioDeviceIOProc)RenderCallbackSPDIF,
 780                                 (void *)p_aout );
 781     if( err != noErr )
 782     {
 783         msg_Err( p_aout, "AudioDeviceAddIOProc failed: [%4.4s]", (char *)&err );
 784         return VLC_FALSE;
 785     }
 786
 787     /* Check for the difference between the Device clock and mdate */
 788     p_sys->clock_diff = - (mtime_t)
 789         AudioConvertHostTimeToNanos( AudioGetCurrentHostTime() ) / 1000;
 790     p_sys->clock_diff += mdate();
 791
 792     /* Start device */
 793     err = AudioDeviceStart( p_sys->i_selected_dev, (AudioDeviceIOProc)RenderCallbackSPDIF );
 794     if( err != noErr )
 795     {
 796         msg_Err( p_aout, "AudioDeviceStart failed: [%4.4s]", (char *)&err );
 797
 798         err = AudioDeviceRemoveIOProc( p_sys->i_selected_dev,
 799                                        (AudioDeviceIOProc)RenderCallbackSPDIF );
 800         if( err != noErr )
 801         {
 802             msg_Err( p_aout, "AudioDeviceRemoveIOProc failed: [%4.4s]", (char *)&err );
 803         }
 804         return VLC_FALSE;
 805     }
 806
 807     return VLC_TRUE;
 808 }
 809
 810
 811 /*****************************************************************************
 812  * Close: Close HAL AudioUnit
 813  *****************************************************************************/
 814 static void Close( vlc_object_t * p_this )
 815 {
 816     aout_instance_t     *p_aout = (aout_instance_t *)p_this;
 817     struct aout_sys_t   *p_sys = p_aout->output.p_sys;
 818     OSStatus            err = noErr;
 819     UInt32              i_param_size = 0;
 820
 821     if( p_sys->au_unit )
 822     {
 823         verify_noerr( AudioOutputUnitStop( p_sys->au_unit ) );
 824         verify_noerr( AudioUnitUninitialize( p_sys->au_unit ) );
 825         verify_noerr( CloseComponent( p_sys->au_unit ) );
 826     }
 827
 828     if( p_sys->b_digital )
 829     {
 830         /* Stop device */
 831         err = AudioDeviceStop( p_sys->i_selected_dev,
 832                                (AudioDeviceIOProc)RenderCallbackSPDIF );
 833         if( err != noErr )
 834         {
 835             msg_Err( p_aout, "AudioDeviceStop failed: [%4.4s]", (char *)&err );
 836         }
 837
 838         /* Remove IOProc callback */
 839         err = AudioDeviceRemoveIOProc( p_sys->i_selected_dev,
 840                                        (AudioDeviceIOProc)RenderCallbackSPDIF );
 841         if( err != noErr )
 842         {
 843             msg_Err( p_aout, "AudioDeviceRemoveIOProc failed: [%4.4s]", (char *)&err );
 844         }
 845
 846         if( p_sys->b_revert )
 847         {
 848             AudioStreamChangeFormat( p_aout, p_sys->i_stream_id, p_sys->sfmt_revert );
 849         }
 850
 851         if( p_sys->b_changed_mixing && p_sys->sfmt_revert.mFormatID != kAudioFormat60958AC3 )
 852         {
 853             int b_mix;
 854             Boolean b_writeable;
 855             /* Revert mixable to true if we are allowed to */
 856             err = AudioDeviceGetPropertyInfo( p_sys->i_selected_dev, 0, FALSE, kAudioDevicePropertySupportsMixing,
 857                                         &i_param_size, &b_writeable );
 858
 859             err = AudioDeviceGetProperty( p_sys->i_selected_dev, 0, FALSE, kAudioDevicePropertySupportsMixing,
 860                                         &i_param_size, &b_mix );
 861
 862             if( !err && b_writeable )
 863             {
 864                 msg_Dbg( p_aout, "mixable is: %d", b_mix );
 865                 b_mix = 1;
 866                 err = AudioDeviceSetProperty( p_sys->i_selected_dev, 0, 0, FALSE,
 867                                     kAudioDevicePropertySupportsMixing, i_param_size, &b_mix );
 868             }
 869
 870             if( err != noErr )
 871             {
 872                 msg_Err( p_aout, "failed to set mixmode: [%4.4s]", (char *)&err );
 873             }
 874         }
 875     }
 876
 877     err = AudioHardwareRemovePropertyListener( kAudioHardwarePropertyDevices,
 878                                                HardwareListener );
 879
 880     if( err != noErr )
 881     {
 882         msg_Err( p_aout, "AudioHardwareRemovePropertyListener failed: [%4.4s]", (char *)&err );
 883     }
 884
 885     if( p_sys->i_hog_pid == getpid() )
 886     {
 887         p_sys->i_hog_pid = -1;
 888         i_param_size = sizeof( p_sys->i_hog_pid );
 889         err = AudioDeviceSetProperty( p_sys->i_selected_dev, 0, 0, FALSE,
 890                                          kAudioDevicePropertyHogMode, i_param_size, &p_sys->i_hog_pid );
 891         if( err != noErr ) msg_Err( p_aout, "Could not release hogmode: [%4.4s]", (char *)&err );
 892     }
 893
 894     if( p_sys ) free( p_sys );
 895 }
 896
 897 /*****************************************************************************
 898  * Play: nothing to do
 899  *****************************************************************************/
 900 static void Play( aout_instance_t * p_aout )
 901 {
 902 }
 903
 904
 905 /*****************************************************************************
 906  * Probe: Check which devices the OS has, and add them to our audio-device menu
 907  *****************************************************************************/
 908 static void Probe( aout_instance_t * p_aout )
 909 {
 910     OSStatus            err = noErr;
 911     UInt32              i = 0, i_param_size = 0;
 912     AudioDeviceID       devid_def = 0;
 913     AudioDeviceID       *p_devices = NULL;
 914     vlc_value_t         val, text;
 915
 916     struct aout_sys_t   *p_sys = p_aout->output.p_sys;
 917
 918     /* Get number of devices */
 919     err = AudioHardwareGetPropertyInfo( kAudioHardwarePropertyDevices,
 920                                         &i_param_size, NULL );
 921     if( err != noErr )
 922     {
 923         msg_Err( p_aout, "Could not get number of devices: [%4.4s]", (char *)&err );
 924         goto error;
 925     }
 926
 927     p_sys->i_devices = i_param_size / sizeof( AudioDeviceID );
 928
 929     if( p_sys->i_devices < 1 )
 930     {
 931         msg_Err( p_aout, "No audio output devices were found." );
 932         goto error;
 933     }
 934
 935     msg_Dbg( p_aout, "system has [%ld] device(s)", p_sys->i_devices );
 936
 937     /* Allocate DeviceID array */
 938     p_devices = (AudioDeviceID*)malloc( sizeof(AudioDeviceID) * p_sys->i_devices );
 939     if( p_devices == NULL )
 940     {
 941         msg_Err( p_aout, "out of memory" );
 942         goto error;
 943     }
 944
 945     /* Populate DeviceID array */
 946     err = AudioHardwareGetProperty( kAudioHardwarePropertyDevices,
 947                                     &i_param_size, p_devices );
 948     if( err != noErr )
 949     {
 950         msg_Err( p_aout, "could not get the device IDs: [%4.4s]", (char *)&err );
 951         goto error;
 952     }
 953
 954     /* Find the ID of the default Device */
 955     i_param_size = sizeof( AudioDeviceID );
 956     err = AudioHardwareGetProperty( kAudioHardwarePropertyDefaultOutputDevice,
 957                                     &i_param_size, &devid_def );
 958     if( err != noErr )
 959     {
 960         msg_Err( p_aout, "could not get default audio device: [%4.4s]", (char *)&err );
 961         goto error;
 962     }
 963     p_sys->i_default_dev = devid_def;
 964
 965     var_Create( p_aout, "audio-device", VLC_VAR_INTEGER|VLC_VAR_HASCHOICE );
 966     text.psz_string = _("Audio Device");
 967     var_Change( p_aout, "audio-device", VLC_VAR_SETTEXT, &text, NULL );
 968
 969     for( i = 0; i < p_sys->i_devices; i++ )
 970     {
 971         char *psz_name;
 972         i_param_size = 0;
 973
 974         /* Retrieve the length of the device name */
 975         err = AudioDeviceGetPropertyInfo(
 976                     p_devices[i], 0, VLC_FALSE,
 977                     kAudioDevicePropertyDeviceName,
 978                     &i_param_size, NULL);
 979         if( err ) goto error;
 980
 981         /* Retrieve the name of the device */
 982         psz_name = (char *)malloc( i_param_size );
 983         err = AudioDeviceGetProperty(
 984                     p_devices[i], 0, VLC_FALSE,
 985                     kAudioDevicePropertyDeviceName,
 986                     &i_param_size, psz_name);
 987         if( err ) goto error;
 988
 989         msg_Dbg( p_aout, "DevID: %#lx DevName: %s", p_devices[i], psz_name );
 990
 991         if( !AudioDeviceHasOutput( p_devices[i]) )
 992         {
 993             msg_Dbg( p_aout, "this device is INPUT only. skipping..." );
 994             continue;
 995         }
 996
 997         /* Add the menu entries */
 998         val.i_int = (int)p_devices[i];
 999         text.psz_string = strdup( psz_name );
1000         var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
1001         if( p_sys->i_default_dev == p_devices[i] )
1002         {
1003             /* The default device is the selected device normally */
1004             var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
1005             var_Set( p_aout, "audio-device", val );
1006         }
1007
1008         if( AudioDeviceSupportsDigital( p_aout, p_devices[i] ) )
1009         {
1010             val.i_int = (int)p_devices[i] | AOUT_VAR_SPDIF_FLAG;
1011             asprintf( &text.psz_string, _("%s (Encoded Output)"), psz_name );
1012             var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
1013             if( p_sys->i_default_dev == p_devices[i] && config_GetInt( p_aout, "spdif" ) )
1014             {
1015                 /* We selected to prefer SPDIF output if available
1016                  * then this "dummy" entry should be selected */
1017                 var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
1018                 var_Set( p_aout, "audio-device", val );
1019             }
1020         }
1021
1022         free( psz_name);
1023     }
1024
1025     /* If a device is already "preselected", then use this device */
1026     var_Get( p_aout->p_vlc, "macosx-audio-device", &val );
1027     if( val.i_int > 0 )
1028     {
1029         var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
1030         var_Set( p_aout, "audio-device", val );
1031     }
1032
1033     /* If we change the device we want to use, we should renegotiate the audio chain */
1034     var_AddCallback( p_aout, "audio-device", AudioDeviceCallback, NULL );
1035
1036     /* Attach a Listener so that we are notified of a change in the Device setup */
1037     err = AudioHardwareAddPropertyListener( kAudioHardwarePropertyDevices,
1038                                             HardwareListener,
1039                                             (void *)p_aout );
1040     if( err )
1041         goto error;
1042
1043     if( p_devices ) free( p_devices );
1044     return;
1045
1046 error:
1047     var_Destroy( p_aout, "audio-device" );
1048     if( p_devices ) free( p_devices );
1049     return;
1050 }
1051
1052 /*****************************************************************************
1053  * AudioDeviceHasOutput: Checks if the Device actually provides any outputs at all
1054  *****************************************************************************/
1055 static int AudioDeviceHasOutput( AudioDeviceID i_dev_id )
1056 {
1057     UInt32                      dataSize;
1058     Boolean                     isWritable;
1059
1060     verify_noerr( AudioDeviceGetPropertyInfo( i_dev_id, 0, FALSE, kAudioDevicePropertyStreams, &dataSize, &isWritable) );
1061     if (dataSize == 0) return FALSE;
1062
1063     return TRUE;
1064 }
1065
1066 /*****************************************************************************
1067  * AudioDeviceSupportsDigital: Check i_dev_id for digital stream support.
1068  *****************************************************************************/
1069 static int AudioDeviceSupportsDigital( aout_instance_t *p_aout, AudioDeviceID i_dev_id )
1070 {
1071     OSStatus                    err = noErr;
1072     UInt32                      i_param_size = 0;
1073     AudioStreamID               *p_streams = NULL;
1074     int                         i = 0, i_streams = 0;
1075     vlc_bool_t                  b_return = VLC_FALSE;
1076
1077     /* Retrieve all the output streams */
1078     err = AudioDeviceGetPropertyInfo( i_dev_id, 0, FALSE,
1079                                       kAudioDevicePropertyStreams,
1080                                       &i_param_size, NULL );
1081     if( err != noErr )
1082     {
1083         msg_Err( p_aout, "could not get number of streams: [%4.4s]", (char *)&err );
1084         return VLC_FALSE;
1085     }
1086
1087     i_streams = i_param_size / sizeof( AudioStreamID );
1088     p_streams = (AudioStreamID *)malloc( i_param_size );
1089     if( p_streams == NULL )
1090     {
1091         msg_Err( p_aout, "out of memory" );
1092         return VLC_ENOMEM;
1093     }
1094
1095     err = AudioDeviceGetProperty( i_dev_id, 0, FALSE,
1096                                     kAudioDevicePropertyStreams,
1097                                     &i_param_size, p_streams );
1098
1099     if( err != noErr )
1100     {
1101         msg_Err( p_aout, "could not get number of streams: [%4.4s]", (char *)&err );
1102         return VLC_FALSE;
1103     }
1104
1105     for( i = 0; i < i_streams; i++ )
1106     {
1107         if( AudioStreamSupportsDigital( p_aout, p_streams[i] ) )
1108             b_return = VLC_TRUE;
1109     }
1110
1111     if( p_streams ) free( p_streams );
1112     return b_return;
1113 }
1114
1115 /*****************************************************************************
1116  * AudioStreamSupportsDigital: Check i_stream_id for digital stream support.
1117  *****************************************************************************/
1118 static int AudioStreamSupportsDigital( aout_instance_t *p_aout, AudioStreamID i_stream_id )
1119 {
1120     OSStatus                    err = noErr;
1121     UInt32                      i_param_size = 0;
1122     AudioStreamBasicDescription *p_format_list = NULL;
1123     int                         i = 0, i_formats = 0;
1124     vlc_bool_t                  b_return = VLC_FALSE;
1125
1126     /* Retrieve all the stream formats supported by each output stream */
1127     err = AudioStreamGetPropertyInfo( i_stream_id, 0,
1128                                       kAudioStreamPropertyPhysicalFormats,
1129                                       &i_param_size, NULL );
1130     if( err != noErr )
1131     {
1132         msg_Err( p_aout, "could not get number of streamformats: [%4.4s]", (char *)&err );
1133         return VLC_FALSE;
1134     }
1135
1136     i_formats = i_param_size / sizeof( AudioStreamBasicDescription );
1137     p_format_list = (AudioStreamBasicDescription *)malloc( i_param_size );
1138     if( p_format_list == NULL )
1139     {
1140         msg_Err( p_aout, "could not malloc the memory" );
1141         return VLC_FALSE;
1142     }
1143
1144     err = AudioStreamGetProperty( i_stream_id, 0,
1145                                       kAudioStreamPropertyPhysicalFormats,
1146                                       &i_param_size, p_format_list );
1147     if( err != noErr )
1148     {
1149         msg_Err( p_aout, "could not get the list of streamformats: [%4.4s]", (char *)&err );
1150         free( p_format_list);
1151         p_format_list = NULL;
1152         return VLC_FALSE;
1153     }
1154
1155     for( i = 0; i < i_formats; i++ )
1156     {
1157         msg_Dbg( p_aout, STREAM_FORMAT_MSG( "supported format: ", p_format_list[i] ) );
1158
1159         if( p_format_list[i].mFormatID == 'IAC3' ||
1160                   p_format_list[i].mFormatID == kAudioFormat60958AC3 )
1161         {
1162             b_return = VLC_TRUE;
1163         }
1164     }
1165
1166     if( p_format_list ) free( p_format_list );
1167     return b_return;
1168 }
1169
1170 /*****************************************************************************
1171  * AudioStreamChangeFormat: Change i_stream_id to change_format
1172  *****************************************************************************/
1173 static int AudioStreamChangeFormat( aout_instance_t *p_aout, AudioStreamID i_stream_id, AudioStreamBasicDescription change_format )
1174 {
1175     OSStatus            err = noErr;
1176     UInt32              i_param_size = 0;
1177     int i;
1178
1179     struct timeval now;
1180     struct timespec timeout;
1181     struct { vlc_mutex_t lock; vlc_cond_t cond; } w;
1182
1183     msg_Dbg( p_aout, STREAM_FORMAT_MSG( "setting stream format: ", change_format ) );
1184
1185     /* Condition because SetProperty is asynchronious */
1186     vlc_cond_init( p_aout, &w.cond );
1187     vlc_mutex_init( p_aout, &w.lock );
1188     vlc_mutex_lock( &w.lock );
1189
1190     /* Install the callback */
1191     err = AudioStreamAddPropertyListener( i_stream_id, 0,
1192                                       kAudioStreamPropertyPhysicalFormat,
1193                                       StreamListener, (void *)&w );
1194     if( err != noErr )
1195     {
1196         msg_Err( p_aout, "AudioStreamAddPropertyListener failed: [%4.4s]", (char *)&err );
1197         return VLC_FALSE;
1198     }
1199
1200     /* change the format */
1201     err = AudioStreamSetProperty( i_stream_id, 0, 0,
1202                                   kAudioStreamPropertyPhysicalFormat,
1203                                   sizeof( AudioStreamBasicDescription ),
1204                                   &change_format );
1205     if( err != noErr )
1206     {
1207         msg_Err( p_aout, "could not set the stream format: [%4.4s]", (char *)&err );
1208         return VLC_FALSE;
1209     }
1210
1211     /* The AudioStreamSetProperty is not only asynchronious (requiring the locks)
1212      * it is also not Atomic, in it's behaviour.
1213      * Therefore we check 5 times before we really give up.
1214      * FIXME: failing isn't actually implemented yet. */
1215     for( i = 0; i < 5; i++ )
1216     {
1217         AudioStreamBasicDescription actual_format;
1218
1219         gettimeofday( &now, NULL );
1220         timeout.tv_sec = now.tv_sec;
1221         timeout.tv_nsec = (now.tv_usec + 500000) * 1000;
1222
1223         if( pthread_cond_timedwait( &w.cond.cond, &w.lock.mutex, &timeout ) )
1224         {
1225             msg_Dbg( p_aout, "reached timeout" );
1226         }
1227
1228         i_param_size = sizeof( AudioStreamBasicDescription );
1229         err = AudioStreamGetProperty( i_stream_id, 0,
1230                                       kAudioStreamPropertyPhysicalFormat,
1231                                       &i_param_size,
1232                                       &actual_format );
1233
1234         msg_Dbg( p_aout, STREAM_FORMAT_MSG( "actual format in use: ", actual_format ) );
1235         if( actual_format.mSampleRate == change_format.mSampleRate &&
1236             actual_format.mFormatID == change_format.mFormatID &&
1237             actual_format.mFramesPerPacket == change_format.mFramesPerPacket )
1238         {
1239             /* The right format is now active */
1240             break;
1241         }
1242         /* We need to check again */
1243     }
1244
1245     /* Removing the property listener */
1246     err = AudioStreamRemovePropertyListener( i_stream_id, 0,
1247                                             kAudioStreamPropertyPhysicalFormat,
1248                                             StreamListener );
1249     if( err != noErr )
1250     {
1251         msg_Err( p_aout, "AudioStreamRemovePropertyListener failed: [%4.4s]", (char *)&err );
1252         return VLC_FALSE;
1253     }
1254
1255     /* Destroy the lock and condition */
1256     vlc_mutex_unlock( &w.lock );
1257     vlc_mutex_destroy( &w.lock );
1258     vlc_cond_destroy( &w.cond );
1259
1260     return VLC_TRUE;
1261 }
1262
1263 /*****************************************************************************
1264  * RenderCallbackAnalog: This function is called everytime the AudioUnit wants
1265  * us to provide some more audio data.
1266  * Don't print anything during normal playback, calling blocking function from
1267  * this callback is not allowed.
1268  *****************************************************************************/
1269 static OSStatus RenderCallbackAnalog( vlc_object_t *_p_aout,
1270                                       AudioUnitRenderActionFlags *ioActionFlags,
1271                                       const AudioTimeStamp *inTimeStamp,
1272                                       unsigned int inBusNummer,
1273                                       unsigned int inNumberFrames,
1274                                       AudioBufferList *ioData )
1275 {
1276     AudioTimeStamp  host_time;
1277     mtime_t         current_date = 0;
1278     uint32_t        i_mData_bytes = 0;
1279
1280     aout_instance_t * p_aout = (aout_instance_t *)_p_aout;
1281     struct aout_sys_t * p_sys = p_aout->output.p_sys;
1282
1283     host_time.mFlags = kAudioTimeStampHostTimeValid;
1284     AudioDeviceTranslateTime( p_sys->i_selected_dev, inTimeStamp, &host_time );
1285
1286     /* Check for the difference between the Device clock and mdate */
1287     p_sys->clock_diff = - (mtime_t)
1288         AudioConvertHostTimeToNanos( AudioGetCurrentHostTime() ) / 1000;
1289     p_sys->clock_diff += mdate();
1290
1291     current_date = p_sys->clock_diff +
1292                    AudioConvertHostTimeToNanos( host_time.mHostTime ) / 1000;
1293                    //- ((mtime_t) 1000000 / p_aout->output.output.i_rate * 31 ); // 31 = Latency in Frames. retrieve somewhere
1294
1295     if( ioData == NULL && ioData->mNumberBuffers < 1 )
1296     {
1297         msg_Err( p_aout, "no iodata or buffers");
1298         return 0;
1299     }
1300     if( ioData->mNumberBuffers > 1 )
1301         msg_Err( p_aout, "well this is weird. seems like there is more than one buffer..." );
1302
1303
1304     if( p_sys->i_total_bytes > 0 )
1305     {
1306         i_mData_bytes = __MIN( p_sys->i_total_bytes - p_sys->i_read_bytes, ioData->mBuffers[0].mDataByteSize );
1307         p_aout->p_vlc->pf_memcpy( ioData->mBuffers[0].mData, &p_sys->p_remainder_buffer[p_sys->i_read_bytes], i_mData_bytes );
1308         p_sys->i_read_bytes += i_mData_bytes;
1309         current_date += (mtime_t) ( (mtime_t) 1000000 / p_aout->output.output.i_rate ) *
1310                         ( i_mData_bytes / 4 / aout_FormatNbChannels( &p_aout->output.output )  ); // 4 is fl32 specific
1311
1312         if( p_sys->i_read_bytes >= p_sys->i_total_bytes )
1313             p_sys->i_read_bytes = p_sys->i_total_bytes = 0;
1314     }
1315
1316     while( i_mData_bytes < ioData->mBuffers[0].mDataByteSize )
1317     {
1318         /* We don't have enough data yet */
1319         aout_buffer_t * p_buffer;
1320         p_buffer = aout_OutputNextBuffer( p_aout, current_date , VLC_FALSE );
1321
1322         if( p_buffer != NULL )
1323         {
1324             uint32_t i_second_mData_bytes = __MIN( p_buffer->i_nb_bytes, ioData->mBuffers[0].mDataByteSize - i_mData_bytes );
1325
1326             p_aout->p_vlc->pf_memcpy( (uint8_t *)ioData->mBuffers[0].mData + i_mData_bytes, p_buffer->p_buffer, i_second_mData_bytes );
1327             i_mData_bytes += i_second_mData_bytes;
1328
1329             if( i_mData_bytes >= ioData->mBuffers[0].mDataByteSize )
1330             {
1331                 p_sys->i_total_bytes = p_buffer->i_nb_bytes - i_second_mData_bytes;
1332                 p_aout->p_vlc->pf_memcpy( p_sys->p_remainder_buffer, &p_buffer->p_buffer[i_second_mData_bytes], p_sys->i_total_bytes );
1333             }
1334             else
1335             {
1336                 /* update current_date */
1337                 current_date += (mtime_t) ( (mtime_t) 1000000 / p_aout->output.output.i_rate ) *
1338                                 ( i_second_mData_bytes / 4 / aout_FormatNbChannels( &p_aout->output.output )  ); // 4 is fl32 specific
1339             }
1340             aout_BufferFree( p_buffer );
1341         }
1342         else
1343         {
1344              p_aout->p_vlc->pf_memset( (uint8_t *)ioData->mBuffers[0].mData +i_mData_bytes, 0, ioData->mBuffers[0].mDataByteSize - i_mData_bytes );
1345              i_mData_bytes += ioData->mBuffers[0].mDataByteSize - i_mData_bytes;
1346         }
1347     }
1348     return( noErr );
1349 }
1350
1351 /*****************************************************************************
1352  * RenderCallbackSPDIF: callback for SPDIF audio output
1353  *****************************************************************************/
1354 static OSStatus RenderCallbackSPDIF( AudioDeviceID inDevice,
1355                                     const AudioTimeStamp * inNow,
1356                                     const void * inInputData,
1357                                     const AudioTimeStamp * inInputTime,
1358                                     AudioBufferList * outOutputData,
1359                                     const AudioTimeStamp * inOutputTime,
1360                                     void * threadGlobals )
1361 {
1362     aout_buffer_t * p_buffer;
1363     mtime_t         current_date;
1364
1365     aout_instance_t * p_aout = (aout_instance_t *)threadGlobals;
1366     struct aout_sys_t * p_sys = p_aout->output.p_sys;
1367
1368     /* Check for the difference between the Device clock and mdate */
1369     p_sys->clock_diff = - (mtime_t)
1370         AudioConvertHostTimeToNanos( inNow->mHostTime ) / 1000;
1371     p_sys->clock_diff += mdate();
1372
1373     current_date = p_sys->clock_diff +
1374                    AudioConvertHostTimeToNanos( inOutputTime->mHostTime ) / 1000;
1375                    //- ((mtime_t) 1000000 / p_aout->output.output.i_rate * 31 ); // 31 = Latency in Frames. retrieve somewhere
1376
1377     p_buffer = aout_OutputNextBuffer( p_aout, current_date, VLC_TRUE );
1378
1379 #define BUFFER outOutputData->mBuffers[p_sys->i_stream_index]
1380     if( p_buffer != NULL )
1381     {
1382         if( (int)BUFFER.mDataByteSize != (int)p_buffer->i_nb_bytes)
1383             msg_Warn( p_aout, "bytesize: %d nb_bytes: %d", (int)BUFFER.mDataByteSize, (int)p_buffer->i_nb_bytes );
1384
1385         /* move data into output data buffer */
1386         p_aout->p_vlc->pf_memcpy( BUFFER.mData,
1387                                   p_buffer->p_buffer, p_buffer->i_nb_bytes );
1388         aout_BufferFree( p_buffer );
1389     }
1390     else
1391     {
1392         p_aout->p_vlc->pf_memset( BUFFER.mData, 0, BUFFER.mDataByteSize );
1393     }
1394 #undef BUFFER
1395
1396     return( noErr );
1397 }
1398
1399 /*****************************************************************************
1400  * HardwareListener: Warns us of changes in the list of registered devices
1401  *****************************************************************************/
1402 static OSStatus HardwareListener( AudioHardwarePropertyID inPropertyID,
1403                                   void * inClientData )
1404 {
1405     OSStatus err = noErr;
1406     aout_instance_t     *p_aout = (aout_instance_t *)inClientData;
1407
1408     switch( inPropertyID )
1409     {
1410         case kAudioHardwarePropertyDevices:
1411         {
1412             /* something changed in the list of devices */
1413             /* We trigger the audio-device's aout_ChannelsRestart callback */
1414             var_Change( p_aout, "audio-device", VLC_VAR_TRIGGER_CALLBACKS, NULL, NULL );
1415             var_Destroy( p_aout, "audio-device" );
1416         }
1417         break;
1418     }
1419
1420     return( err );
1421 }
1422
1423 /*****************************************************************************
1424  * StreamListener
1425  *****************************************************************************/
1426 static OSStatus StreamListener( AudioStreamID inStream,
1427                                 UInt32 inChannel,
1428                                 AudioDevicePropertyID inPropertyID,
1429                                 void * inClientData )
1430 {
1431     OSStatus err = noErr;
1432     struct { vlc_mutex_t lock; vlc_cond_t cond; } * w = inClientData;
1433
1434     switch( inPropertyID )
1435     {
1436         case kAudioStreamPropertyPhysicalFormat:
1437             vlc_mutex_lock( &w->lock );
1438             vlc_cond_signal( &w->cond );
1439             vlc_mutex_unlock( &w->lock );
1440             break;
1441
1442         default:
1443             break;
1444     }
1445     return( err );
1446 }
1447
1448 /*****************************************************************************
1449  * AudioDeviceCallback: Callback triggered when the audio-device variable is changed
1450  *****************************************************************************/
1451 static int AudioDeviceCallback( vlc_object_t *p_this, const char *psz_variable,
1452                      vlc_value_t old_val, vlc_value_t new_val, void *param )
1453 {
1454     aout_instance_t *p_aout = (aout_instance_t *)p_this;
1455     var_Set( p_aout->p_vlc, "macosx-audio-device", new_val );
1456     msg_Dbg( p_aout, "Set Device: %#x", new_val.i_int );
1457     return aout_ChannelsRestart( p_this, psz_variable, old_val, new_val, param );
1458 }
1459