libao2/ao_coreaudio.c

   1 /*
   2  * CoreAudio audio output driver for Mac OS X
   3  *
   4  * original copyright (C) Timothy J. Wood - Aug 2000
   5  * ported to MPlayer libao2 by Dan Christiansen
   6  *
   7  * The S/PDIF part of the code is based on the auhal audio output
   8  * module from VideoLAN:
   9  * Copyright (c) 2006 Derk-Jan Hartman <hartman at videolan dot org>
  10  *
  11  * This file is part of MPlayer.
  12  *
  13  * MPlayer is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2 of the License, or
  16  * (at your option) any later version.
  17  *
  18  * MPlayer is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License along
  24  * along with MPlayer; if not, write to the Free Software
  25  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  26  */
  27
  28 /*
  29  * The MacOS X CoreAudio framework doesn't mesh as simply as some
  30  * simpler frameworks do.  This is due to the fact that CoreAudio pulls
  31  * audio samples rather than having them pushed at it (which is nice
  32  * when you are wanting to do good buffering of audio).
  33  *
  34  * AC-3 and MPEG audio passthrough is possible, but has never been tested
  35  * due to lack of a soundcard that supports it.
  36  */
  37
  38 #include <CoreServices/CoreServices.h>
  39 #include <AudioUnit/AudioUnit.h>
  40 #include <AudioToolbox/AudioToolbox.h>
  41 #include <stdio.h>
  42 #include <string.h>
  43 #include <stdlib.h>
  44 #include <inttypes.h>
  45 #include <sys/types.h>
  46 #include <unistd.h>
  47
  48 #include "config.h"
  49 #include "mp_msg.h"
  50
  51 #include "audio_out.h"
  52 #include "audio_out_internal.h"
  53 #include "libaf/af_format.h"
  54 #include "osdep/timer.h"
  55 #include "libavutil/fifo.h"
  56 #include "subopt-helper.h"
  57
  58 static const ao_info_t info =
  59   {
  60     "Darwin/Mac OS X native audio output",
  61     "coreaudio",
  62     "Timothy J. Wood & Dan Christiansen & Chris Roccati",
  63     ""
  64   };
  65
  66 LIBAO_EXTERN(coreaudio)
  67
  68 /* Prefix for all mp_msg() calls */
  69 #define ao_msg(a, b, c...) mp_msg(a, b, "AO: [coreaudio] " c)
  70
  71 #if MAC_OS_X_VERSION_MAX_ALLOWED <= 1040
  72 /* AudioDeviceIOProcID does not exist in Mac OS X 10.4. We can emulate
  73  * this by using AudioDeviceAddIOProc() and AudioDeviceRemoveIOProc(). */
  74 #define AudioDeviceIOProcID AudioDeviceIOProc
  75 #define AudioDeviceDestroyIOProcID AudioDeviceRemoveIOProc
  76 static OSStatus AudioDeviceCreateIOProcID(AudioDeviceID dev,
  77                                           AudioDeviceIOProc proc,
  78                                           void *data,
  79                                           AudioDeviceIOProcID *procid)
  80 {
  81   *procid = proc;
  82   return AudioDeviceAddIOProc(dev, proc, data);
  83 }
  84 #endif
  85
  86 typedef struct ao_coreaudio_s
  87 {
  88   AudioDeviceID i_selected_dev;             /* Keeps DeviceID of the selected device. */
  89   int b_supports_digital;                   /* Does the currently selected device support digital mode? */
  90   int b_digital;                            /* Are we running in digital mode? */
  91   int b_muted;                              /* Are we muted in digital mode? */
  92
  93   AudioDeviceIOProcID renderCallback;       /* Render callback used for SPDIF */
  94
  95   /* AudioUnit */
  96   AudioUnit theOutputUnit;
  97
  98   /* CoreAudio SPDIF mode specific */
  99   pid_t i_hog_pid;                          /* Keeps the pid of our hog status. */
 100   AudioStreamID i_stream_id;                /* The StreamID that has a cac3 streamformat */
 101   int i_stream_index;                       /* The index of i_stream_id in an AudioBufferList */
 102   AudioStreamBasicDescription stream_format;/* The format we changed the stream to */
 103   AudioStreamBasicDescription sfmt_revert;  /* The original format of the stream */
 104   int b_revert;                             /* Whether we need to revert the stream format */
 105   int b_changed_mixing;                     /* Whether we need to set the mixing mode back */
 106   int b_stream_format_changed;              /* Flag for main thread to reset stream's format to digital and reset buffer */
 107
 108   /* Original common part */
 109   int packetSize;
 110   int paused;
 111
 112   /* Ring-buffer */
 113   AVFifoBuffer *buffer;
 114   unsigned int buffer_len; ///< must always be num_chunks * chunk_size
 115   unsigned int num_chunks;
 116   unsigned int chunk_size;
 117 } ao_coreaudio_t;
 118
 119 static ao_coreaudio_t *ao = NULL;
 120
 121 /**
 122  * \brief add data to ringbuffer
 123  */
 124 static int write_buffer(unsigned char* data, int len){
 125   int free = ao->buffer_len - av_fifo_size(ao->buffer);
 126   if (len > free) len = free;
 127   return av_fifo_generic_write(ao->buffer, data, len, NULL);
 128 }
 129
 130 /**
 131  * \brief remove data from ringbuffer
 132  */
 133 static int read_buffer(unsigned char* data,int len){
 134   int buffered = av_fifo_size(ao->buffer);
 135   if (len > buffered) len = buffered;
 136   if (data)
 137     av_fifo_generic_read(ao->buffer, data, len, NULL);
 138   else
 139     av_fifo_drain(ao->buffer, len);
 140   return len;
 141 }
 142
 143 static OSStatus theRenderProc(void *inRefCon,
 144                               AudioUnitRenderActionFlags *inActionFlags,
 145                               const AudioTimeStamp *inTimeStamp,
 146                               UInt32 inBusNumber, UInt32 inNumFrames,
 147                               AudioBufferList *ioData)
 148 {
 149 int amt=av_fifo_size(ao->buffer);
 150 int req=(inNumFrames)*ao->packetSize;
 151
 152         if(amt>req)
 153                 amt=req;
 154
 155         if(amt)
 156                 read_buffer((unsigned char *)ioData->mBuffers[0].mData, amt);
 157         else audio_pause();
 158         ioData->mBuffers[0].mDataByteSize = amt;
 159
 160         return noErr;
 161 }
 162
 163 static int control(int cmd,void *arg){
 164 ao_control_vol_t *control_vol;
 165 OSStatus err;
 166 Float32 vol;
 167         switch (cmd) {
 168         case AOCONTROL_GET_VOLUME:
 169                 control_vol = (ao_control_vol_t*)arg;
 170                 if (ao->b_digital) {
 171                         // Digital output has no volume adjust.
 172                         return CONTROL_FALSE;
 173                 }
 174                 err = AudioUnitGetParameter(ao->theOutputUnit, kHALOutputParam_Volume, kAudioUnitScope_Global, 0, &vol);
 175
 176                 if(err==0) {
 177                         // printf("GET VOL=%f\n", vol);
 178                         control_vol->left=control_vol->right=vol*100.0/4.0;
 179                         return CONTROL_TRUE;
 180                 }
 181                 else {
 182                         ao_msg(MSGT_AO, MSGL_WARN, "could not get HAL output volume: [%4.4s]\n", (char *)&err);
 183                         return CONTROL_FALSE;
 184                 }
 185
 186         case AOCONTROL_SET_VOLUME:
 187                 control_vol = (ao_control_vol_t*)arg;
 188
 189                 if (ao->b_digital) {
 190                         // Digital output can not set volume. Here we have to return true
 191                         // to make mixer forget it. Else mixer will add a soft filter,
 192                         // that's not we expected and the filter not support ac3 stream
 193                         // will cause mplayer die.
 194
 195                         // Although not support set volume, but at least we support mute.
 196                         // MPlayer set mute by set volume to zero, we handle it.
 197                         if (control_vol->left == 0 && control_vol->right == 0)
 198                                 ao->b_muted = 1;
 199                         else
 200                                 ao->b_muted = 0;
 201                         return CONTROL_TRUE;
 202                 }
 203
 204                 vol=(control_vol->left+control_vol->right)*4.0/200.0;
 205                 err = AudioUnitSetParameter(ao->theOutputUnit, kHALOutputParam_Volume, kAudioUnitScope_Global, 0, vol, 0);
 206                 if(err==0) {
 207                         // printf("SET VOL=%f\n", vol);
 208                         return CONTROL_TRUE;
 209                 }
 210                 else {
 211                         ao_msg(MSGT_AO, MSGL_WARN, "could not set HAL output volume: [%4.4s]\n", (char *)&err);
 212                         return CONTROL_FALSE;
 213                 }
 214           /* Everything is currently unimplemented */
 215         default:
 216           return CONTROL_FALSE;
 217         }
 218
 219 }
 220
 221
 222 static void print_format(int lev, const char* str, const AudioStreamBasicDescription *f){
 223     uint32_t flags=(uint32_t) f->mFormatFlags;
 224     ao_msg(MSGT_AO,lev, "%s %7.1fHz %"PRIu32"bit [%c%c%c%c][%"PRIu32"][%"PRIu32"][%"PRIu32"][%"PRIu32"][%"PRIu32"] %s %s %s%s%s%s\n",
 225             str, f->mSampleRate, f->mBitsPerChannel,
 226             (int)(f->mFormatID & 0xff000000) >> 24,
 227             (int)(f->mFormatID & 0x00ff0000) >> 16,
 228             (int)(f->mFormatID & 0x0000ff00) >>  8,
 229             (int)(f->mFormatID & 0x000000ff) >>  0,
 230             f->mFormatFlags, f->mBytesPerPacket,
 231             f->mFramesPerPacket, f->mBytesPerFrame,
 232             f->mChannelsPerFrame,
 233             (flags&kAudioFormatFlagIsFloat) ? "float" : "int",
 234             (flags&kAudioFormatFlagIsBigEndian) ? "BE" : "LE",
 235             (flags&kAudioFormatFlagIsSignedInteger) ? "S" : "U",
 236             (flags&kAudioFormatFlagIsPacked) ? " packed" : "",
 237             (flags&kAudioFormatFlagIsAlignedHigh) ? " aligned" : "",
 238             (flags&kAudioFormatFlagIsNonInterleaved) ? " ni" : "" );
 239 }
 240
 241 static OSStatus GetAudioProperty(AudioObjectID id,
 242                                  AudioObjectPropertySelector selector,
 243                                  UInt32 outSize, void *outData)
 244 {
 245     AudioObjectPropertyAddress property_address;
 246
 247     property_address.mSelector = selector;
 248     property_address.mScope    = kAudioObjectPropertyScopeGlobal;
 249     property_address.mElement  = kAudioObjectPropertyElementMaster;
 250
 251     return AudioObjectGetPropertyData(id, &property_address, 0, NULL, &outSize, outData);
 252 }
 253
 254 static UInt32 GetAudioPropertyArray(AudioObjectID id,
 255                                     AudioObjectPropertySelector selector,
 256                                     AudioObjectPropertyScope scope,
 257                                     void **outData)
 258 {
 259     OSStatus err;
 260     AudioObjectPropertyAddress property_address;
 261     UInt32 i_param_size;
 262
 263     property_address.mSelector = selector;
 264     property_address.mScope    = scope;
 265     property_address.mElement  = kAudioObjectPropertyElementMaster;
 266
 267     err = AudioObjectGetPropertyDataSize(id, &property_address, 0, NULL, &i_param_size);
 268
 269     if (err != noErr)
 270         return 0;
 271
 272     *outData = malloc(i_param_size);
 273
 274
 275     err = AudioObjectGetPropertyData(id, &property_address, 0, NULL, &i_param_size, *outData);
 276
 277     if (err != noErr) {
 278         free(*outData);
 279         return 0;
 280     }
 281
 282     return i_param_size;
 283 }
 284
 285 static UInt32 GetGlobalAudioPropertyArray(AudioObjectID id,
 286                                           AudioObjectPropertySelector selector,
 287                                           void **outData)
 288 {
 289     return GetAudioPropertyArray(id, selector, kAudioObjectPropertyScopeGlobal, outData);
 290 }
 291
 292 static OSStatus GetAudioPropertyString(AudioObjectID id,
 293                                        AudioObjectPropertySelector selector,
 294                                        char **outData)
 295 {
 296     OSStatus err;
 297     AudioObjectPropertyAddress property_address;
 298     UInt32 i_param_size;
 299     CFStringRef string;
 300     CFIndex string_length;
 301
 302     property_address.mSelector = selector;
 303     property_address.mScope    = kAudioObjectPropertyScopeGlobal;
 304     property_address.mElement  = kAudioObjectPropertyElementMaster;
 305
 306     i_param_size = sizeof(CFStringRef);
 307     err = AudioObjectGetPropertyData(id, &property_address, 0, NULL, &i_param_size, &string);
 308     if (err != noErr)
 309         return err;
 310
 311     string_length = CFStringGetMaximumSizeForEncoding(CFStringGetLength(string),
 312                                                       kCFStringEncodingASCII);
 313     *outData = malloc(string_length + 1);
 314     CFStringGetCString(string, *outData, string_length + 1, kCFStringEncodingASCII);
 315
 316     CFRelease(string);
 317
 318     return err;
 319 }
 320
 321 static OSStatus SetAudioProperty(AudioObjectID id,
 322                                  AudioObjectPropertySelector selector,
 323                                  UInt32 inDataSize, void *inData)
 324 {
 325     AudioObjectPropertyAddress property_address;
 326
 327     property_address.mSelector = selector;
 328     property_address.mScope    = kAudioObjectPropertyScopeGlobal;
 329     property_address.mElement  = kAudioObjectPropertyElementMaster;
 330
 331     return AudioObjectSetPropertyData(id, &property_address, 0, NULL, inDataSize, inData);
 332 }
 333
 334 static Boolean IsAudioPropertySettable(AudioObjectID id,
 335                                        AudioObjectPropertySelector selector,
 336                                        Boolean *outData)
 337 {
 338     AudioObjectPropertyAddress property_address;
 339
 340     property_address.mSelector = selector;
 341     property_address.mScope    = kAudioObjectPropertyScopeGlobal;
 342     property_address.mElement  = kAudioObjectPropertyElementMaster;
 343
 344     return AudioObjectIsPropertySettable(id, &property_address, outData);
 345 }
 346
 347 static int AudioDeviceSupportsDigital( AudioDeviceID i_dev_id );
 348 static int AudioStreamSupportsDigital( AudioStreamID i_stream_id );
 349 static int OpenSPDIF(void);
 350 static int AudioStreamChangeFormat( AudioStreamID i_stream_id, AudioStreamBasicDescription change_format );
 351 static OSStatus RenderCallbackSPDIF( AudioDeviceID inDevice,
 352                                     const AudioTimeStamp * inNow,
 353                                     const void * inInputData,
 354                                     const AudioTimeStamp * inInputTime,
 355                                     AudioBufferList * outOutputData,
 356                                     const AudioTimeStamp * inOutputTime,
 357                                     void * threadGlobals );
 358 static OSStatus StreamListener( AudioObjectID inObjectID,
 359                                 UInt32 inNumberAddresses,
 360                                 const AudioObjectPropertyAddress inAddresses[],
 361                                 void *inClientData );
 362 static OSStatus DeviceListener( AudioObjectID inObjectID,
 363                                 UInt32 inNumberAddresses,
 364                                 const AudioObjectPropertyAddress inAddresses[],
 365                                 void *inClientData );
 366
 367 static void print_help(void)
 368 {
 369     OSStatus err;
 370     UInt32 i_param_size;
 371     int num_devices;
 372     AudioDeviceID *devids;
 373     char *device_name;
 374
 375     mp_msg(MSGT_AO, MSGL_FATAL,
 376            "\n-ao coreaudio commandline help:\n"
 377            "Example: mplayer -ao coreaudio:device_id=266\n"
 378            "    open Core Audio with output device ID 266.\n"
 379            "\nOptions:\n"
 380            "    device_id\n"
 381            "        ID of output device to use (0 = default device)\n"
 382            "    help\n"
 383            "        This help including list of available devices.\n"
 384            "\n"
 385            "Available output devices:\n");
 386
 387     i_param_size = GetGlobalAudioPropertyArray(kAudioObjectSystemObject, kAudioHardwarePropertyDevices, (void **)&devids);
 388
 389     if (!i_param_size) {
 390         mp_msg(MSGT_AO, MSGL_FATAL, "Failed to get list of output devices.\n");
 391         return;
 392     }
 393
 394     num_devices = i_param_size / sizeof(AudioDeviceID);
 395
 396     for (int i = 0; i < num_devices; ++i) {
 397         err = GetAudioPropertyString(devids[i], kAudioObjectPropertyName, &device_name);
 398
 399         if (err == noErr) {
 400             mp_msg(MSGT_AO, MSGL_FATAL, "%s (id: %"PRIu32")\n", device_name, devids[i]);
 401             free(device_name);
 402         } else
 403             mp_msg(MSGT_AO, MSGL_FATAL, "Unknown (id: %"PRIu32")\n", devids[i]);
 404     }
 405
 406     mp_msg(MSGT_AO, MSGL_FATAL, "\n");
 407
 408     free(devids);
 409 }
 410
 411 static int init(int rate,int channels,int format,int flags)
 412 {
 413 AudioStreamBasicDescription inDesc;
 414 ComponentDescription desc;
 415 Component comp;
 416 AURenderCallbackStruct renderCallback;
 417 OSStatus err;
 418 UInt32 size, maxFrames, b_alive;
 419 char *psz_name;
 420 AudioDeviceID devid_def = 0;
 421 int device_id, display_help = 0;
 422
 423     const opt_t subopts[] = {
 424         {"device_id", OPT_ARG_INT,  &device_id,    NULL},
 425         {"help",      OPT_ARG_BOOL, &display_help, NULL},
 426         {NULL}
 427     };
 428
 429     // set defaults
 430     device_id = 0;
 431
 432     if (subopt_parse(ao_subdevice, subopts) != 0 || display_help) {
 433         print_help();
 434         if (!display_help)
 435             return 0;
 436     }
 437
 438     ao_msg(MSGT_AO,MSGL_V, "init([%dHz][%dch][%s][%d])\n", rate, channels, af_fmt2str_short(format), flags);
 439
 440     ao = calloc(1, sizeof(ao_coreaudio_t));
 441
 442     ao->i_selected_dev = 0;
 443     ao->b_supports_digital = 0;
 444     ao->b_digital = 0;
 445     ao->b_muted = 0;
 446     ao->b_stream_format_changed = 0;
 447     ao->i_hog_pid = -1;
 448     ao->i_stream_id = 0;
 449     ao->i_stream_index = -1;
 450     ao->b_revert = 0;
 451     ao->b_changed_mixing = 0;
 452
 453     global_ao->no_persistent_volume = true;
 454
 455     if (device_id == 0) {
 456         /* Find the ID of the default Device. */
 457         err = GetAudioProperty(kAudioObjectSystemObject,
 458                                kAudioHardwarePropertyDefaultOutputDevice,
 459                                sizeof(UInt32), &devid_def);
 460         if (err != noErr)
 461         {
 462             ao_msg(MSGT_AO, MSGL_WARN, "could not get default audio device: [%4.4s]\n", (char *)&err);
 463             goto err_out;
 464         }
 465     } else {
 466         devid_def = device_id;
 467     }
 468
 469     /* Retrieve the name of the device. */
 470     err = GetAudioPropertyString(devid_def,
 471                                  kAudioObjectPropertyName,
 472                                  &psz_name);
 473     if (err != noErr)
 474     {
 475         ao_msg(MSGT_AO, MSGL_WARN, "could not get default audio device name: [%4.4s]\n", (char *)&err);
 476         goto err_out;
 477     }
 478
 479     ao_msg(MSGT_AO,MSGL_V, "got audio output device ID: %"PRIu32" Name: %s\n", devid_def, psz_name );
 480
 481     /* Probe whether device support S/PDIF stream output if input is AC3 stream. */
 482     if (AF_FORMAT_IS_AC3(format)) {
 483         if (AudioDeviceSupportsDigital(devid_def))
 484         {
 485             ao->b_supports_digital = 1;
 486         }
 487         ao_msg(MSGT_AO, MSGL_V,
 488                "probe default audio output device about support for digital s/pdif output: %d\n",
 489                ao->b_supports_digital );
 490     }
 491
 492     free(psz_name);
 493
 494     // Save selected device id
 495     ao->i_selected_dev = devid_def;
 496
 497         // Build Description for the input format
 498         inDesc.mSampleRate=rate;
 499         inDesc.mFormatID=ao->b_supports_digital ? kAudioFormat60958AC3 : kAudioFormatLinearPCM;
 500         inDesc.mChannelsPerFrame=channels;
 501         inDesc.mBitsPerChannel=af_fmt2bits(format);
 502
 503     if((format&AF_FORMAT_POINT_MASK)==AF_FORMAT_F) {
 504         // float
 505                 inDesc.mFormatFlags = kAudioFormatFlagIsFloat|kAudioFormatFlagIsPacked;
 506     }
 507     else if((format&AF_FORMAT_SIGN_MASK)==AF_FORMAT_SI) {
 508         // signed int
 509                 inDesc.mFormatFlags = kAudioFormatFlagIsSignedInteger|kAudioFormatFlagIsPacked;
 510     }
 511     else {
 512         // unsigned int
 513                 inDesc.mFormatFlags = kAudioFormatFlagIsPacked;
 514     }
 515     if ((format & AF_FORMAT_END_MASK) == AF_FORMAT_BE)
 516         inDesc.mFormatFlags |= kAudioFormatFlagIsBigEndian;
 517
 518     inDesc.mFramesPerPacket = 1;
 519     ao->packetSize = inDesc.mBytesPerPacket = inDesc.mBytesPerFrame = inDesc.mFramesPerPacket*channels*(inDesc.mBitsPerChannel/8);
 520     print_format(MSGL_V, "source:",&inDesc);
 521
 522     if (ao->b_supports_digital)
 523     {
 524         b_alive = 1;
 525         err = GetAudioProperty(ao->i_selected_dev,
 526                                kAudioDevicePropertyDeviceIsAlive,
 527                                sizeof(UInt32), &b_alive);
 528         if (err != noErr)
 529             ao_msg(MSGT_AO, MSGL_WARN, "could not check whether device is alive: [%4.4s]\n", (char *)&err);
 530         if (!b_alive)
 531             ao_msg(MSGT_AO, MSGL_WARN, "device is not alive\n" );
 532
 533         /* S/PDIF output need device in HogMode. */
 534         err = GetAudioProperty(ao->i_selected_dev,
 535                                kAudioDevicePropertyHogMode,
 536                                sizeof(pid_t), &ao->i_hog_pid);
 537         if (err != noErr)
 538         {
 539             /* This is not a fatal error. Some drivers simply don't support this property. */
 540             ao_msg(MSGT_AO, MSGL_WARN, "could not check whether device is hogged: [%4.4s]\n",
 541                      (char *)&err);
 542             ao->i_hog_pid = -1;
 543         }
 544
 545         if (ao->i_hog_pid != -1 && ao->i_hog_pid != getpid())
 546         {
 547             ao_msg(MSGT_AO, MSGL_WARN, "Selected audio device is exclusively in use by another program.\n" );
 548             goto err_out;
 549         }
 550         ao->stream_format = inDesc;
 551         return OpenSPDIF();
 552     }
 553
 554         /* original analog output code */
 555         desc.componentType = kAudioUnitType_Output;
 556         desc.componentSubType = (device_id == 0) ? kAudioUnitSubType_DefaultOutput : kAudioUnitSubType_HALOutput;
 557         desc.componentManufacturer = kAudioUnitManufacturer_Apple;
 558         desc.componentFlags = 0;
 559         desc.componentFlagsMask = 0;
 560
 561         comp = FindNextComponent(NULL, &desc);  //Finds an component that meets the desc spec's
 562         if (comp == NULL) {
 563                 ao_msg(MSGT_AO, MSGL_WARN, "Unable to find Output Unit component\n");
 564                 goto err_out;
 565         }
 566
 567         err = OpenAComponent(comp, &(ao->theOutputUnit));  //gains access to the services provided by the component
 568         if (err) {
 569                 ao_msg(MSGT_AO, MSGL_WARN, "Unable to open Output Unit component: [%4.4s]\n", (char *)&err);
 570                 goto err_out;
 571         }
 572
 573         // Initialize AudioUnit
 574         err = AudioUnitInitialize(ao->theOutputUnit);
 575         if (err) {
 576                 ao_msg(MSGT_AO, MSGL_WARN, "Unable to initialize Output Unit component: [%4.4s]\n", (char *)&err);
 577                 goto err_out1;
 578         }
 579
 580         size =  sizeof(AudioStreamBasicDescription);
 581         err = AudioUnitSetProperty(ao->theOutputUnit, kAudioUnitProperty_StreamFormat, kAudioUnitScope_Input, 0, &inDesc, size);
 582
 583         if (err) {
 584                 ao_msg(MSGT_AO, MSGL_WARN, "Unable to set the input format: [%4.4s]\n", (char *)&err);
 585                 goto err_out2;
 586         }
 587
 588         size = sizeof(UInt32);
 589         err = AudioUnitGetProperty(ao->theOutputUnit, kAudioDevicePropertyBufferSize, kAudioUnitScope_Input, 0, &maxFrames, &size);
 590
 591         if (err)
 592         {
 593                 ao_msg(MSGT_AO,MSGL_WARN, "AudioUnitGetProperty returned [%4.4s] when getting kAudioDevicePropertyBufferSize\n", (char *)&err);
 594                 goto err_out2;
 595         }
 596
 597         //Set the Current Device to the Default Output Unit.
 598     err = AudioUnitSetProperty(ao->theOutputUnit, kAudioOutputUnitProperty_CurrentDevice, kAudioUnitScope_Global, 0, &ao->i_selected_dev, sizeof(ao->i_selected_dev));
 599
 600         ao->chunk_size = maxFrames;//*inDesc.mBytesPerFrame;
 601
 602         ao_data.samplerate = inDesc.mSampleRate;
 603         ao_data.channels = inDesc.mChannelsPerFrame;
 604     ao_data.bps = ao_data.samplerate * inDesc.mBytesPerFrame;
 605     ao_data.outburst = ao->chunk_size;
 606         ao_data.buffersize = ao_data.bps;
 607
 608         ao->num_chunks = (ao_data.bps+ao->chunk_size-1)/ao->chunk_size;
 609     ao->buffer_len = ao->num_chunks * ao->chunk_size;
 610     ao->buffer = av_fifo_alloc(ao->buffer_len);
 611
 612         ao_msg(MSGT_AO,MSGL_V, "using %5d chunks of %d bytes (buffer len %d bytes)\n", (int)ao->num_chunks, (int)ao->chunk_size, (int)ao->buffer_len);
 613
 614     renderCallback.inputProc = theRenderProc;
 615     renderCallback.inputProcRefCon = 0;
 616     err = AudioUnitSetProperty(ao->theOutputUnit, kAudioUnitProperty_SetRenderCallback, kAudioUnitScope_Input, 0, &renderCallback, sizeof(AURenderCallbackStruct));
 617         if (err) {
 618                 ao_msg(MSGT_AO, MSGL_WARN, "Unable to set the render callback: [%4.4s]\n", (char *)&err);
 619                 goto err_out2;
 620         }
 621
 622         reset();
 623
 624     return CONTROL_OK;
 625
 626 err_out2:
 627     AudioUnitUninitialize(ao->theOutputUnit);
 628 err_out1:
 629     CloseComponent(ao->theOutputUnit);
 630 err_out:
 631     av_fifo_free(ao->buffer);
 632     free(ao);
 633     ao = NULL;
 634     return CONTROL_FALSE;
 635 }
 636
 637 /*****************************************************************************
 638  * Setup a encoded digital stream (SPDIF)
 639  *****************************************************************************/
 640 static int OpenSPDIF(void)
 641 {
 642     OSStatus                    err = noErr;
 643     UInt32                      i_param_size, b_mix = 0;
 644     Boolean                     b_writeable = 0;
 645     AudioStreamID               *p_streams = NULL;
 646     int                         i, i_streams = 0;
 647     AudioObjectPropertyAddress  property_address;
 648
 649     /* Start doing the SPDIF setup process. */
 650     ao->b_digital = 1;
 651
 652     /* Hog the device. */
 653     ao->i_hog_pid = getpid() ;
 654
 655     err = SetAudioProperty(ao->i_selected_dev,
 656                            kAudioDevicePropertyHogMode,
 657                            sizeof(ao->i_hog_pid), &ao->i_hog_pid);
 658     if (err != noErr)
 659     {
 660         ao_msg(MSGT_AO, MSGL_WARN, "failed to set hogmode: [%4.4s]\n", (char *)&err);
 661         ao->i_hog_pid = -1;
 662         goto err_out;
 663     }
 664
 665     property_address.mSelector = kAudioDevicePropertySupportsMixing;
 666     property_address.mScope    = kAudioObjectPropertyScopeGlobal;
 667     property_address.mElement  = kAudioObjectPropertyElementMaster;
 668
 669     /* Set mixable to false if we are allowed to. */
 670     if (AudioObjectHasProperty(ao->i_selected_dev, &property_address)) {
 671         /* Set mixable to false if we are allowed to. */
 672         err = IsAudioPropertySettable(ao->i_selected_dev,
 673                                       kAudioDevicePropertySupportsMixing,
 674                                       &b_writeable);
 675         err = GetAudioProperty(ao->i_selected_dev,
 676                                kAudioDevicePropertySupportsMixing,
 677                                sizeof(UInt32), &b_mix);
 678         if (err == noErr && b_writeable)
 679         {
 680             b_mix = 0;
 681             err = SetAudioProperty(ao->i_selected_dev,
 682                                    kAudioDevicePropertySupportsMixing,
 683                                    sizeof(UInt32), &b_mix);
 684             ao->b_changed_mixing = 1;
 685         }
 686         if (err != noErr)
 687         {
 688             ao_msg(MSGT_AO, MSGL_WARN, "failed to set mixmode: [%4.4s]\n", (char *)&err);
 689             goto err_out;
 690         }
 691     }
 692
 693     /* Get a list of all the streams on this device. */
 694     i_param_size = GetAudioPropertyArray(ao->i_selected_dev,
 695                                          kAudioDevicePropertyStreams,
 696                                          kAudioDevicePropertyScopeOutput,
 697                                          (void **)&p_streams);
 698
 699     if (!i_param_size) {
 700         ao_msg(MSGT_AO, MSGL_WARN, "could not get number of streams.\n");
 701         goto err_out;
 702     }
 703
 704     i_streams = i_param_size / sizeof(AudioStreamID);
 705
 706     ao_msg(MSGT_AO, MSGL_V, "current device stream number: %d\n", i_streams);
 707
 708     for (i = 0; i < i_streams && ao->i_stream_index < 0; ++i)
 709     {
 710         /* Find a stream with a cac3 stream. */
 711         AudioStreamRangedDescription *p_format_list = NULL;
 712         int i_formats = 0, j = 0, b_digital = 0;
 713
 714         i_param_size = GetGlobalAudioPropertyArray(p_streams[i],
 715                                                    kAudioStreamPropertyAvailablePhysicalFormats,
 716                                                    (void **)&p_format_list);
 717
 718         if (!i_param_size) {
 719             ao_msg(MSGT_AO, MSGL_WARN,
 720                    "Could not get number of stream formats.\n");
 721             continue;
 722         }
 723
 724         i_formats = i_param_size / sizeof(AudioStreamRangedDescription);
 725
 726         /* Check if one of the supported formats is a digital format. */
 727         for (j = 0; j < i_formats; ++j)
 728         {
 729             if (p_format_list[j].mFormat.mFormatID == 'IAC3'               ||
 730                 p_format_list[j].mFormat.mFormatID == 'iac3'               ||
 731                 p_format_list[j].mFormat.mFormatID == kAudioFormat60958AC3 ||
 732                 p_format_list[j].mFormat.mFormatID == kAudioFormatAC3)
 733             {
 734                 b_digital = 1;
 735                 break;
 736             }
 737         }
 738
 739         if (b_digital)
 740         {
 741             /* If this stream supports a digital (cac3) format, then set it. */
 742             int i_requested_rate_format = -1;
 743             int i_current_rate_format = -1;
 744             int i_backup_rate_format = -1;
 745
 746             ao->i_stream_id = p_streams[i];
 747             ao->i_stream_index = i;
 748
 749             if (ao->b_revert == 0)
 750             {
 751                 /* Retrieve the original format of this stream first if not done so already. */
 752                 err = GetAudioProperty(ao->i_stream_id,
 753                                        kAudioStreamPropertyPhysicalFormat,
 754                                        sizeof(ao->sfmt_revert), &ao->sfmt_revert);
 755                 if (err != noErr)
 756                 {
 757                     ao_msg(MSGT_AO, MSGL_WARN,
 758                            "Could not retrieve the original stream format: [%4.4s]\n",
 759                            (char *)&err);
 760                     free(p_format_list);
 761                     continue;
 762                 }
 763                 ao->b_revert = 1;
 764             }
 765
 766             for (j = 0; j < i_formats; ++j)
 767                 if (p_format_list[j].mFormat.mFormatID == 'IAC3'               ||
 768                     p_format_list[j].mFormat.mFormatID == 'iac3'               ||
 769                     p_format_list[j].mFormat.mFormatID == kAudioFormat60958AC3 ||
 770                     p_format_list[j].mFormat.mFormatID == kAudioFormatAC3)
 771                 {
 772                    if (p_format_list[j].mFormat.mSampleRate == ao->stream_format.mSampleRate)
 773                     {
 774                         i_requested_rate_format = j;
 775                         break;
 776                     }
 777                     if (p_format_list[j].mFormat.mSampleRate == ao->sfmt_revert.mSampleRate)
 778                         i_current_rate_format = j;
 779                     else if (i_backup_rate_format < 0 || p_format_list[j].mFormat.mSampleRate > p_format_list[i_backup_rate_format].mFormat.mSampleRate)
 780                         i_backup_rate_format = j;
 781                 }
 782
 783             if (i_requested_rate_format >= 0) /* We prefer to output at the samplerate of the original audio. */
 784                 ao->stream_format = p_format_list[i_requested_rate_format].mFormat;
 785             else if (i_current_rate_format >= 0) /* If not possible, we will try to use the current samplerate of the device. */
 786                 ao->stream_format = p_format_list[i_current_rate_format].mFormat;
 787             else ao->stream_format = p_format_list[i_backup_rate_format].mFormat; /* And if we have to, any digital format will be just fine (highest rate possible). */
 788         }
 789         free(p_format_list);
 790     }
 791     free(p_streams);
 792
 793     if (ao->i_stream_index < 0)
 794     {
 795         ao_msg(MSGT_AO, MSGL_WARN,
 796                "Cannot find any digital output stream format when OpenSPDIF().\n");
 797         goto err_out;
 798     }
 799
 800     print_format(MSGL_V, "original stream format:", &ao->sfmt_revert);
 801
 802     if (!AudioStreamChangeFormat(ao->i_stream_id, ao->stream_format))
 803         goto err_out;
 804
 805     property_address.mSelector = kAudioDevicePropertyDeviceHasChanged;
 806     property_address.mScope    = kAudioObjectPropertyScopeGlobal;
 807     property_address.mElement  = kAudioObjectPropertyElementMaster;
 808
 809     err = AudioObjectAddPropertyListener(ao->i_selected_dev,
 810                                          &property_address,
 811                                          DeviceListener,
 812                                          NULL);
 813     if (err != noErr)
 814         ao_msg(MSGT_AO, MSGL_WARN, "AudioDeviceAddPropertyListener for kAudioDevicePropertyDeviceHasChanged failed: [%4.4s]\n", (char *)&err);
 815
 816
 817     /* FIXME: If output stream is not native byte-order, we need change endian somewhere. */
 818     /*        Although there's no such case reported.                                     */
 819 #if HAVE_BIGENDIAN
 820     if (!(ao->stream_format.mFormatFlags & kAudioFormatFlagIsBigEndian))
 821 #else
 822     /* tell mplayer that we need a byteswap on AC3 streams, */
 823     if (ao->stream_format.mFormatID & kAudioFormat60958AC3)
 824         ao_data.format = AF_FORMAT_AC3_LE;
 825
 826     if (ao->stream_format.mFormatFlags & kAudioFormatFlagIsBigEndian)
 827 #endif
 828         ao_msg(MSGT_AO, MSGL_WARN,
 829                "Output stream has non-native byte order, digital output may fail.\n");
 830
 831     /* For ac3/dts, just use packet size 6144 bytes as chunk size. */
 832     ao->chunk_size = ao->stream_format.mBytesPerPacket;
 833
 834     ao_data.samplerate = ao->stream_format.mSampleRate;
 835     ao_data.channels = ao->stream_format.mChannelsPerFrame;
 836     ao_data.bps = ao_data.samplerate * (ao->stream_format.mBytesPerPacket/ao->stream_format.mFramesPerPacket);
 837     ao_data.outburst = ao->chunk_size;
 838     ao_data.buffersize = ao_data.bps;
 839
 840     ao->num_chunks = (ao_data.bps+ao->chunk_size-1)/ao->chunk_size;
 841     ao->buffer_len = ao->num_chunks * ao->chunk_size;
 842     ao->buffer = av_fifo_alloc(ao->buffer_len);
 843
 844     ao_msg(MSGT_AO,MSGL_V, "using %5d chunks of %d bytes (buffer len %d bytes)\n", (int)ao->num_chunks, (int)ao->chunk_size, (int)ao->buffer_len);
 845
 846
 847     /* Create IOProc callback. */
 848     err = AudioDeviceCreateIOProcID(ao->i_selected_dev,
 849                                     (AudioDeviceIOProc)RenderCallbackSPDIF,
 850                                     (void *)ao,
 851                                     &ao->renderCallback);
 852
 853     if (err != noErr || ao->renderCallback == NULL)
 854     {
 855         ao_msg(MSGT_AO, MSGL_WARN, "AudioDeviceAddIOProc failed: [%4.4s]\n", (char *)&err);
 856         goto err_out1;
 857     }
 858
 859     reset();
 860
 861     return CONTROL_TRUE;
 862
 863 err_out1:
 864     if (ao->b_revert)
 865         AudioStreamChangeFormat(ao->i_stream_id, ao->sfmt_revert);
 866 err_out:
 867     if (ao->b_changed_mixing && ao->sfmt_revert.mFormatID != kAudioFormat60958AC3)
 868     {
 869         int b_mix = 1;
 870         err = SetAudioProperty(ao->i_selected_dev,
 871                                kAudioDevicePropertySupportsMixing,
 872                                sizeof(int), &b_mix);
 873         if (err != noErr)
 874             ao_msg(MSGT_AO, MSGL_WARN, "failed to set mixmode: [%4.4s]\n",
 875                    (char *)&err);
 876     }
 877     if (ao->i_hog_pid == getpid())
 878     {
 879         ao->i_hog_pid = -1;
 880         err = SetAudioProperty(ao->i_selected_dev,
 881                                kAudioDevicePropertyHogMode,
 882                                sizeof(ao->i_hog_pid), &ao->i_hog_pid);
 883         if (err != noErr)
 884             ao_msg(MSGT_AO, MSGL_WARN, "Could not release hogmode: [%4.4s]\n",
 885                    (char *)&err);
 886     }
 887     av_fifo_free(ao->buffer);
 888     free(ao);
 889     ao = NULL;
 890     return CONTROL_FALSE;
 891 }
 892
 893 /*****************************************************************************
 894  * AudioDeviceSupportsDigital: Check i_dev_id for digital stream support.
 895  *****************************************************************************/
 896 static int AudioDeviceSupportsDigital( AudioDeviceID i_dev_id )
 897 {
 898     UInt32                      i_param_size = 0;
 899     AudioStreamID               *p_streams = NULL;
 900     int                         i = 0, i_streams = 0;
 901     int                         b_return = CONTROL_FALSE;
 902
 903     /* Retrieve all the output streams. */
 904     i_param_size = GetAudioPropertyArray(i_dev_id,
 905                                          kAudioDevicePropertyStreams,
 906                                          kAudioDevicePropertyScopeOutput,
 907                                          (void **)&p_streams);
 908
 909     if (!i_param_size) {
 910         ao_msg(MSGT_AO, MSGL_WARN, "could not get number of streams.\n");
 911         return CONTROL_FALSE;
 912     }
 913
 914     i_streams = i_param_size / sizeof(AudioStreamID);
 915
 916     for (i = 0; i < i_streams; ++i)
 917     {
 918         if (AudioStreamSupportsDigital(p_streams[i]))
 919             b_return = CONTROL_OK;
 920     }
 921
 922     free(p_streams);
 923     return b_return;
 924 }
 925
 926 /*****************************************************************************
 927  * AudioStreamSupportsDigital: Check i_stream_id for digital stream support.
 928  *****************************************************************************/
 929 static int AudioStreamSupportsDigital( AudioStreamID i_stream_id )
 930 {
 931     UInt32 i_param_size;
 932     AudioStreamRangedDescription *p_format_list = NULL;
 933     int i, i_formats, b_return = CONTROL_FALSE;
 934
 935     /* Retrieve all the stream formats supported by each output stream. */
 936     i_param_size = GetGlobalAudioPropertyArray(i_stream_id,
 937                                                kAudioStreamPropertyAvailablePhysicalFormats,
 938                                                (void **)&p_format_list);
 939
 940     if (!i_param_size) {
 941         ao_msg(MSGT_AO, MSGL_WARN, "Could not get number of stream formats.\n");
 942         return CONTROL_FALSE;
 943     }
 944
 945     i_formats = i_param_size / sizeof(AudioStreamRangedDescription);
 946
 947     for (i = 0; i < i_formats; ++i)
 948     {
 949         print_format(MSGL_V, "supported format:", &(p_format_list[i].mFormat));
 950
 951         if (p_format_list[i].mFormat.mFormatID == 'IAC3'               ||
 952             p_format_list[i].mFormat.mFormatID == 'iac3'               ||
 953             p_format_list[i].mFormat.mFormatID == kAudioFormat60958AC3 ||
 954             p_format_list[i].mFormat.mFormatID == kAudioFormatAC3)
 955             b_return = CONTROL_OK;
 956     }
 957
 958     free(p_format_list);
 959     return b_return;
 960 }
 961
 962 /*****************************************************************************
 963  * AudioStreamChangeFormat: Change i_stream_id to change_format
 964  *****************************************************************************/
 965 static int AudioStreamChangeFormat( AudioStreamID i_stream_id, AudioStreamBasicDescription change_format )
 966 {
 967     OSStatus err = noErr;
 968     int i;
 969     AudioObjectPropertyAddress property_address;
 970
 971     static volatile int stream_format_changed;
 972     stream_format_changed = 0;
 973
 974     print_format(MSGL_V, "setting stream format:", &change_format);
 975
 976     /* Install the callback. */
 977     property_address.mSelector = kAudioStreamPropertyPhysicalFormat;
 978     property_address.mScope    = kAudioObjectPropertyScopeGlobal;
 979     property_address.mElement  = kAudioObjectPropertyElementMaster;
 980
 981     err = AudioObjectAddPropertyListener(i_stream_id,
 982                                          &property_address,
 983                                          StreamListener,
 984                                          (void *)&stream_format_changed);
 985     if (err != noErr)
 986     {
 987         ao_msg(MSGT_AO, MSGL_WARN, "AudioStreamAddPropertyListener failed: [%4.4s]\n", (char *)&err);
 988         return CONTROL_FALSE;
 989     }
 990
 991     /* Change the format. */
 992     err = SetAudioProperty(i_stream_id,
 993                            kAudioStreamPropertyPhysicalFormat,
 994                            sizeof(AudioStreamBasicDescription), &change_format);
 995     if (err != noErr)
 996     {
 997         ao_msg(MSGT_AO, MSGL_WARN, "could not set the stream format: [%4.4s]\n", (char *)&err);
 998         return CONTROL_FALSE;
 999     }
1000
1001     /* The AudioStreamSetProperty is not only asynchronious,
1002      * it is also not Atomic, in its behaviour.
1003      * Therefore we check 5 times before we really give up.
1004      * FIXME: failing isn't actually implemented yet. */
1005     for (i = 0; i < 5; ++i)
1006     {
1007         AudioStreamBasicDescription actual_format;
1008         int j;
1009         for (j = 0; !stream_format_changed && j < 50; ++j)
1010             usec_sleep(10000);
1011         if (stream_format_changed)
1012             stream_format_changed = 0;
1013         else
1014             ao_msg(MSGT_AO, MSGL_V, "reached timeout\n" );
1015
1016         err = GetAudioProperty(i_stream_id,
1017                                kAudioStreamPropertyPhysicalFormat,
1018                                sizeof(AudioStreamBasicDescription), &actual_format);
1019
1020         print_format(MSGL_V, "actual format in use:", &actual_format);
1021         if (actual_format.mSampleRate == change_format.mSampleRate &&
1022             actual_format.mFormatID == change_format.mFormatID &&
1023             actual_format.mFramesPerPacket == change_format.mFramesPerPacket)
1024         {
1025             /* The right format is now active. */
1026             break;
1027         }
1028         /* We need to check again. */
1029     }
1030
1031     /* Removing the property listener. */
1032     err = AudioObjectRemovePropertyListener(i_stream_id,
1033                                             &property_address,
1034                                             StreamListener,
1035                                             (void *)&stream_format_changed);
1036     if (err != noErr)
1037     {
1038         ao_msg(MSGT_AO, MSGL_WARN, "AudioStreamRemovePropertyListener failed: [%4.4s]\n", (char *)&err);
1039         return CONTROL_FALSE;
1040     }
1041
1042     return CONTROL_TRUE;
1043 }
1044
1045 /*****************************************************************************
1046  * RenderCallbackSPDIF: callback for SPDIF audio output
1047  *****************************************************************************/
1048 static OSStatus RenderCallbackSPDIF( AudioDeviceID inDevice,
1049                                     const AudioTimeStamp * inNow,
1050                                     const void * inInputData,
1051                                     const AudioTimeStamp * inInputTime,
1052                                     AudioBufferList * outOutputData,
1053                                     const AudioTimeStamp * inOutputTime,
1054                                     void * threadGlobals )
1055 {
1056     int amt = av_fifo_size(ao->buffer);
1057     int req = outOutputData->mBuffers[ao->i_stream_index].mDataByteSize;
1058
1059     if (amt > req)
1060         amt = req;
1061     if (amt)
1062         read_buffer(ao->b_muted ? NULL : (unsigned char *)outOutputData->mBuffers[ao->i_stream_index].mData, amt);
1063
1064     return noErr;
1065 }
1066
1067
1068 static int play(void* output_samples,int num_bytes,int flags)
1069 {
1070     int wrote, b_digital;
1071     SInt32 exit_reason;
1072
1073     // Check whether we need to reset the digital output stream.
1074     if (ao->b_digital && ao->b_stream_format_changed)
1075     {
1076         ao->b_stream_format_changed = 0;
1077         b_digital = AudioStreamSupportsDigital(ao->i_stream_id);
1078         if (b_digital)
1079         {
1080             /* Current stream supports digital format output, let's set it. */
1081             ao_msg(MSGT_AO, MSGL_V,
1082                    "Detected current stream supports digital, try to restore digital output...\n");
1083
1084             if (!AudioStreamChangeFormat(ao->i_stream_id, ao->stream_format))
1085             {
1086                 ao_msg(MSGT_AO, MSGL_WARN, "Restoring digital output failed.\n");
1087             }
1088             else
1089             {
1090                 ao_msg(MSGT_AO, MSGL_WARN, "Restoring digital output succeeded.\n");
1091                 reset();
1092             }
1093         }
1094         else
1095             ao_msg(MSGT_AO, MSGL_V, "Detected current stream does not support digital.\n");
1096     }
1097
1098     wrote=write_buffer(output_samples, num_bytes);
1099     audio_resume();
1100
1101     do {
1102         exit_reason = CFRunLoopRunInMode(kCFRunLoopDefaultMode, 0.01, true);
1103     } while (exit_reason == kCFRunLoopRunHandledSource);
1104
1105     return wrote;
1106 }
1107
1108 /* set variables and buffer to initial state */
1109 static void reset(void)
1110 {
1111   audio_pause();
1112   av_fifo_reset(ao->buffer);
1113 }
1114
1115
1116 /* return available space */
1117 static int get_space(void)
1118 {
1119   return ao->buffer_len - av_fifo_size(ao->buffer);
1120 }
1121
1122
1123 /* return delay until audio is played */
1124 static float get_delay(void)
1125 {
1126   // inaccurate, should also contain the data buffered e.g. by the OS
1127   return (float)av_fifo_size(ao->buffer)/(float)ao_data.bps;
1128 }
1129
1130
1131 /* unload plugin and deregister from coreaudio */
1132 static void uninit(int immed)
1133 {
1134   OSStatus            err = noErr;
1135
1136   if (!immed) {
1137     long long timeleft=(1000000LL*av_fifo_size(ao->buffer))/ao_data.bps;
1138     ao_msg(MSGT_AO,MSGL_DBG2, "%d bytes left @%d bps (%d usec)\n", av_fifo_size(ao->buffer), ao_data.bps, (int)timeleft);
1139     usec_sleep((int)timeleft);
1140   }
1141
1142   if (!ao->b_digital) {
1143       AudioOutputUnitStop(ao->theOutputUnit);
1144       AudioUnitUninitialize(ao->theOutputUnit);
1145       CloseComponent(ao->theOutputUnit);
1146   }
1147   else {
1148       /* Stop device. */
1149       err = AudioDeviceStop(ao->i_selected_dev, ao->renderCallback);
1150       if (err != noErr)
1151           ao_msg(MSGT_AO, MSGL_WARN, "AudioDeviceStop failed: [%4.4s]\n", (char *)&err);
1152
1153       /* Remove IOProc callback. */
1154       err = AudioDeviceDestroyIOProcID(ao->i_selected_dev, ao->renderCallback);
1155       if (err != noErr)
1156           ao_msg(MSGT_AO, MSGL_WARN, "AudioDeviceRemoveIOProc failed: [%4.4s]\n", (char *)&err);
1157
1158       if (ao->b_revert)
1159           AudioStreamChangeFormat(ao->i_stream_id, ao->sfmt_revert);
1160
1161       if (ao->b_changed_mixing && ao->sfmt_revert.mFormatID != kAudioFormat60958AC3)
1162       {
1163           UInt32 b_mix;
1164           Boolean b_writeable = 0;
1165           /* Revert mixable to true if we are allowed to. */
1166           err = IsAudioPropertySettable(ao->i_selected_dev,
1167                                         kAudioDevicePropertySupportsMixing,
1168                                         &b_writeable);
1169           err = GetAudioProperty(ao->i_selected_dev,
1170                                  kAudioDevicePropertySupportsMixing,
1171                                  sizeof(UInt32), &b_mix);
1172           if (err == noErr && b_writeable)
1173           {
1174               b_mix = 1;
1175               err = SetAudioProperty(ao->i_selected_dev,
1176                                      kAudioDevicePropertySupportsMixing,
1177                                      sizeof(UInt32), &b_mix);
1178           }
1179           if (err != noErr)
1180               ao_msg(MSGT_AO, MSGL_WARN, "failed to set mixmode: [%4.4s]\n", (char *)&err);
1181       }
1182       if (ao->i_hog_pid == getpid())
1183       {
1184           ao->i_hog_pid = -1;
1185           err = SetAudioProperty(ao->i_selected_dev,
1186                                  kAudioDevicePropertyHogMode,
1187                                  sizeof(ao->i_hog_pid), &ao->i_hog_pid);
1188           if (err != noErr) ao_msg(MSGT_AO, MSGL_WARN, "Could not release hogmode: [%4.4s]\n", (char *)&err);
1189       }
1190   }
1191
1192   av_fifo_free(ao->buffer);
1193   free(ao);
1194   ao = NULL;
1195 }
1196
1197
1198 /* stop playing, keep buffers (for pause) */
1199 static void audio_pause(void)
1200 {
1201     OSErr err=noErr;
1202
1203     /* Stop callback. */
1204     if (!ao->b_digital)
1205     {
1206         err=AudioOutputUnitStop(ao->theOutputUnit);
1207         if (err != noErr)
1208             ao_msg(MSGT_AO,MSGL_WARN, "AudioOutputUnitStop returned [%4.4s]\n", (char *)&err);
1209     }
1210     else
1211     {
1212         err = AudioDeviceStop(ao->i_selected_dev, ao->renderCallback);
1213         if (err != noErr)
1214             ao_msg(MSGT_AO, MSGL_WARN, "AudioDeviceStop failed: [%4.4s]\n", (char *)&err);
1215     }
1216     ao->paused = 1;
1217 }
1218
1219
1220 /* resume playing, after audio_pause() */
1221 static void audio_resume(void)
1222 {
1223     OSErr err=noErr;
1224
1225     if (!ao->paused)
1226         return;
1227
1228     /* Start callback. */
1229     if (!ao->b_digital)
1230     {
1231         err = AudioOutputUnitStart(ao->theOutputUnit);
1232         if (err != noErr)
1233             ao_msg(MSGT_AO,MSGL_WARN, "AudioOutputUnitStart returned [%4.4s]\n", (char *)&err);
1234     }
1235     else
1236     {
1237         err = AudioDeviceStart(ao->i_selected_dev, ao->renderCallback);
1238         if (err != noErr)
1239             ao_msg(MSGT_AO, MSGL_WARN, "AudioDeviceStart failed: [%4.4s]\n", (char *)&err);
1240     }
1241     ao->paused = 0;
1242 }
1243
1244 /*****************************************************************************
1245  * StreamListener
1246  *****************************************************************************/
1247 static OSStatus StreamListener( AudioObjectID inObjectID,
1248                                 UInt32 inNumberAddresses,
1249                                 const AudioObjectPropertyAddress inAddresses[],
1250                                 void *inClientData )
1251 {
1252     for (int i=0; i < inNumberAddresses; ++i)
1253     {
1254         if (inAddresses[i].mSelector == kAudioStreamPropertyPhysicalFormat) {
1255             ao_msg(MSGT_AO, MSGL_WARN, "got notify kAudioStreamPropertyPhysicalFormat changed.\n");
1256             if (inClientData)
1257                 *(volatile int *)inClientData = 1;
1258             break;
1259         }
1260     }
1261     return noErr;
1262 }
1263
1264 static OSStatus DeviceListener( AudioObjectID inObjectID,
1265                                 UInt32 inNumberAddresses,
1266                                 const AudioObjectPropertyAddress inAddresses[],
1267                                 void *inClientData )
1268 {
1269     for (int i=0; i < inNumberAddresses; ++i)
1270     {
1271         if (inAddresses[i].mSelector == kAudioDevicePropertyDeviceHasChanged) {
1272             ao_msg(MSGT_AO, MSGL_WARN, "got notify kAudioDevicePropertyDeviceHasChanged.\n");
1273             ao->b_stream_format_changed = 1;
1274             break;
1275         }
1276     }
1277     return noErr;
1278 }