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     if (device_id == 0) {
 454         /* Find the ID of the default Device. */
 455         err = GetAudioProperty(kAudioObjectSystemObject,
 456                                kAudioHardwarePropertyDefaultOutputDevice,
 457                                sizeof(UInt32), &devid_def);
 458         if (err != noErr)
 459         {
 460             ao_msg(MSGT_AO, MSGL_WARN, "could not get default audio device: [%4.4s]\n", (char *)&err);
 461             goto err_out;
 462         }
 463     } else {
 464         devid_def = device_id;
 465     }
 466
 467     /* Retrieve the name of the device. */
 468     err = GetAudioPropertyString(devid_def,
 469                                  kAudioObjectPropertyName,
 470                                  &psz_name);
 471     if (err != noErr)
 472     {
 473         ao_msg(MSGT_AO, MSGL_WARN, "could not get default audio device name: [%4.4s]\n", (char *)&err);
 474         goto err_out;
 475     }
 476
 477     ao_msg(MSGT_AO,MSGL_V, "got audio output device ID: %"PRIu32" Name: %s\n", devid_def, psz_name );
 478
 479     /* Probe whether device support S/PDIF stream output if input is AC3 stream. */
 480     if (AF_FORMAT_IS_AC3(format)) {
 481         if (AudioDeviceSupportsDigital(devid_def))
 482         {
 483             ao->b_supports_digital = 1;
 484         }
 485         ao_msg(MSGT_AO, MSGL_V,
 486                "probe default audio output device about support for digital s/pdif output: %d\n",
 487                ao->b_supports_digital );
 488     }
 489
 490     free(psz_name);
 491
 492     // Save selected device id
 493     ao->i_selected_dev = devid_def;
 494
 495         // Build Description for the input format
 496         inDesc.mSampleRate=rate;
 497         inDesc.mFormatID=ao->b_supports_digital ? kAudioFormat60958AC3 : kAudioFormatLinearPCM;
 498         inDesc.mChannelsPerFrame=channels;
 499         inDesc.mBitsPerChannel=af_fmt2bits(format);
 500
 501     if((format&AF_FORMAT_POINT_MASK)==AF_FORMAT_F) {
 502         // float
 503                 inDesc.mFormatFlags = kAudioFormatFlagIsFloat|kAudioFormatFlagIsPacked;
 504     }
 505     else if((format&AF_FORMAT_SIGN_MASK)==AF_FORMAT_SI) {
 506         // signed int
 507                 inDesc.mFormatFlags = kAudioFormatFlagIsSignedInteger|kAudioFormatFlagIsPacked;
 508     }
 509     else {
 510         // unsigned int
 511                 inDesc.mFormatFlags = kAudioFormatFlagIsPacked;
 512     }
 513     if ((format & AF_FORMAT_END_MASK) == AF_FORMAT_BE)
 514         inDesc.mFormatFlags |= kAudioFormatFlagIsBigEndian;
 515
 516     inDesc.mFramesPerPacket = 1;
 517     ao->packetSize = inDesc.mBytesPerPacket = inDesc.mBytesPerFrame = inDesc.mFramesPerPacket*channels*(inDesc.mBitsPerChannel/8);
 518     print_format(MSGL_V, "source:",&inDesc);
 519
 520     if (ao->b_supports_digital)
 521     {
 522         b_alive = 1;
 523         err = GetAudioProperty(ao->i_selected_dev,
 524                                kAudioDevicePropertyDeviceIsAlive,
 525                                sizeof(UInt32), &b_alive);
 526         if (err != noErr)
 527             ao_msg(MSGT_AO, MSGL_WARN, "could not check whether device is alive: [%4.4s]\n", (char *)&err);
 528         if (!b_alive)
 529             ao_msg(MSGT_AO, MSGL_WARN, "device is not alive\n" );
 530
 531         /* S/PDIF output need device in HogMode. */
 532         err = GetAudioProperty(ao->i_selected_dev,
 533                                kAudioDevicePropertyHogMode,
 534                                sizeof(pid_t), &ao->i_hog_pid);
 535         if (err != noErr)
 536         {
 537             /* This is not a fatal error. Some drivers simply don't support this property. */
 538             ao_msg(MSGT_AO, MSGL_WARN, "could not check whether device is hogged: [%4.4s]\n",
 539                      (char *)&err);
 540             ao->i_hog_pid = -1;
 541         }
 542
 543         if (ao->i_hog_pid != -1 && ao->i_hog_pid != getpid())
 544         {
 545             ao_msg(MSGT_AO, MSGL_WARN, "Selected audio device is exclusively in use by another program.\n" );
 546             goto err_out;
 547         }
 548         ao->stream_format = inDesc;
 549         return OpenSPDIF();
 550     }
 551
 552         /* original analog output code */
 553         desc.componentType = kAudioUnitType_Output;
 554         desc.componentSubType = (device_id == 0) ? kAudioUnitSubType_DefaultOutput : kAudioUnitSubType_HALOutput;
 555         desc.componentManufacturer = kAudioUnitManufacturer_Apple;
 556         desc.componentFlags = 0;
 557         desc.componentFlagsMask = 0;
 558
 559         comp = FindNextComponent(NULL, &desc);  //Finds an component that meets the desc spec's
 560         if (comp == NULL) {
 561                 ao_msg(MSGT_AO, MSGL_WARN, "Unable to find Output Unit component\n");
 562                 goto err_out;
 563         }
 564
 565         err = OpenAComponent(comp, &(ao->theOutputUnit));  //gains access to the services provided by the component
 566         if (err) {
 567                 ao_msg(MSGT_AO, MSGL_WARN, "Unable to open Output Unit component: [%4.4s]\n", (char *)&err);
 568                 goto err_out;
 569         }
 570
 571         // Initialize AudioUnit
 572         err = AudioUnitInitialize(ao->theOutputUnit);
 573         if (err) {
 574                 ao_msg(MSGT_AO, MSGL_WARN, "Unable to initialize Output Unit component: [%4.4s]\n", (char *)&err);
 575                 goto err_out1;
 576         }
 577
 578         size =  sizeof(AudioStreamBasicDescription);
 579         err = AudioUnitSetProperty(ao->theOutputUnit, kAudioUnitProperty_StreamFormat, kAudioUnitScope_Input, 0, &inDesc, size);
 580
 581         if (err) {
 582                 ao_msg(MSGT_AO, MSGL_WARN, "Unable to set the input format: [%4.4s]\n", (char *)&err);
 583                 goto err_out2;
 584         }
 585
 586         size = sizeof(UInt32);
 587         err = AudioUnitGetProperty(ao->theOutputUnit, kAudioDevicePropertyBufferSize, kAudioUnitScope_Input, 0, &maxFrames, &size);
 588
 589         if (err)
 590         {
 591                 ao_msg(MSGT_AO,MSGL_WARN, "AudioUnitGetProperty returned [%4.4s] when getting kAudioDevicePropertyBufferSize\n", (char *)&err);
 592                 goto err_out2;
 593         }
 594
 595         //Set the Current Device to the Default Output Unit.
 596     err = AudioUnitSetProperty(ao->theOutputUnit, kAudioOutputUnitProperty_CurrentDevice, kAudioUnitScope_Global, 0, &ao->i_selected_dev, sizeof(ao->i_selected_dev));
 597
 598         ao->chunk_size = maxFrames;//*inDesc.mBytesPerFrame;
 599
 600         ao_data.samplerate = inDesc.mSampleRate;
 601         ao_data.channels = inDesc.mChannelsPerFrame;
 602     ao_data.bps = ao_data.samplerate * inDesc.mBytesPerFrame;
 603     ao_data.outburst = ao->chunk_size;
 604         ao_data.buffersize = ao_data.bps;
 605
 606         ao->num_chunks = (ao_data.bps+ao->chunk_size-1)/ao->chunk_size;
 607     ao->buffer_len = ao->num_chunks * ao->chunk_size;
 608     ao->buffer = av_fifo_alloc(ao->buffer_len);
 609
 610         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);
 611
 612     renderCallback.inputProc = theRenderProc;
 613     renderCallback.inputProcRefCon = 0;
 614     err = AudioUnitSetProperty(ao->theOutputUnit, kAudioUnitProperty_SetRenderCallback, kAudioUnitScope_Input, 0, &renderCallback, sizeof(AURenderCallbackStruct));
 615         if (err) {
 616                 ao_msg(MSGT_AO, MSGL_WARN, "Unable to set the render callback: [%4.4s]\n", (char *)&err);
 617                 goto err_out2;
 618         }
 619
 620         reset();
 621
 622     return CONTROL_OK;
 623
 624 err_out2:
 625     AudioUnitUninitialize(ao->theOutputUnit);
 626 err_out1:
 627     CloseComponent(ao->theOutputUnit);
 628 err_out:
 629     av_fifo_free(ao->buffer);
 630     free(ao);
 631     ao = NULL;
 632     return CONTROL_FALSE;
 633 }
 634
 635 /*****************************************************************************
 636  * Setup a encoded digital stream (SPDIF)
 637  *****************************************************************************/
 638 static int OpenSPDIF(void)
 639 {
 640     OSStatus                    err = noErr;
 641     UInt32                      i_param_size, b_mix = 0;
 642     Boolean                     b_writeable = 0;
 643     AudioStreamID               *p_streams = NULL;
 644     int                         i, i_streams = 0;
 645     AudioObjectPropertyAddress  property_address;
 646
 647     /* Start doing the SPDIF setup process. */
 648     ao->b_digital = 1;
 649
 650     /* Hog the device. */
 651     ao->i_hog_pid = getpid() ;
 652
 653     err = SetAudioProperty(ao->i_selected_dev,
 654                            kAudioDevicePropertyHogMode,
 655                            sizeof(ao->i_hog_pid), &ao->i_hog_pid);
 656     if (err != noErr)
 657     {
 658         ao_msg(MSGT_AO, MSGL_WARN, "failed to set hogmode: [%4.4s]\n", (char *)&err);
 659         ao->i_hog_pid = -1;
 660         goto err_out;
 661     }
 662
 663     property_address.mSelector = kAudioDevicePropertySupportsMixing;
 664     property_address.mScope    = kAudioObjectPropertyScopeGlobal;
 665     property_address.mElement  = kAudioObjectPropertyElementMaster;
 666
 667     /* Set mixable to false if we are allowed to. */
 668     if (AudioObjectHasProperty(ao->i_selected_dev, &property_address)) {
 669         /* Set mixable to false if we are allowed to. */
 670         err = IsAudioPropertySettable(ao->i_selected_dev,
 671                                       kAudioDevicePropertySupportsMixing,
 672                                       &b_writeable);
 673         err = GetAudioProperty(ao->i_selected_dev,
 674                                kAudioDevicePropertySupportsMixing,
 675                                sizeof(UInt32), &b_mix);
 676         if (err == noErr && b_writeable)
 677         {
 678             b_mix = 0;
 679             err = SetAudioProperty(ao->i_selected_dev,
 680                                    kAudioDevicePropertySupportsMixing,
 681                                    sizeof(UInt32), &b_mix);
 682             ao->b_changed_mixing = 1;
 683         }
 684         if (err != noErr)
 685         {
 686             ao_msg(MSGT_AO, MSGL_WARN, "failed to set mixmode: [%4.4s]\n", (char *)&err);
 687             goto err_out;
 688         }
 689     }
 690
 691     /* Get a list of all the streams on this device. */
 692     i_param_size = GetAudioPropertyArray(ao->i_selected_dev,
 693                                          kAudioDevicePropertyStreams,
 694                                          kAudioDevicePropertyScopeOutput,
 695                                          (void **)&p_streams);
 696
 697     if (!i_param_size) {
 698         ao_msg(MSGT_AO, MSGL_WARN, "could not get number of streams.\n");
 699         goto err_out;
 700     }
 701
 702     i_streams = i_param_size / sizeof(AudioStreamID);
 703
 704     ao_msg(MSGT_AO, MSGL_V, "current device stream number: %d\n", i_streams);
 705
 706     for (i = 0; i < i_streams && ao->i_stream_index < 0; ++i)
 707     {
 708         /* Find a stream with a cac3 stream. */
 709         AudioStreamRangedDescription *p_format_list = NULL;
 710         int i_formats = 0, j = 0, b_digital = 0;
 711
 712         i_param_size = GetGlobalAudioPropertyArray(p_streams[i],
 713                                                    kAudioStreamPropertyAvailablePhysicalFormats,
 714                                                    (void **)&p_format_list);
 715
 716         if (!i_param_size) {
 717             ao_msg(MSGT_AO, MSGL_WARN,
 718                    "Could not get number of stream formats.\n");
 719             continue;
 720         }
 721
 722         i_formats = i_param_size / sizeof(AudioStreamRangedDescription);
 723
 724         /* Check if one of the supported formats is a digital format. */
 725         for (j = 0; j < i_formats; ++j)
 726         {
 727             if (p_format_list[j].mFormat.mFormatID == 'IAC3'               ||
 728                 p_format_list[j].mFormat.mFormatID == 'iac3'               ||
 729                 p_format_list[j].mFormat.mFormatID == kAudioFormat60958AC3 ||
 730                 p_format_list[j].mFormat.mFormatID == kAudioFormatAC3)
 731             {
 732                 b_digital = 1;
 733                 break;
 734             }
 735         }
 736
 737         if (b_digital)
 738         {
 739             /* If this stream supports a digital (cac3) format, then set it. */
 740             int i_requested_rate_format = -1;
 741             int i_current_rate_format = -1;
 742             int i_backup_rate_format = -1;
 743
 744             ao->i_stream_id = p_streams[i];
 745             ao->i_stream_index = i;
 746
 747             if (ao->b_revert == 0)
 748             {
 749                 /* Retrieve the original format of this stream first if not done so already. */
 750                 err = GetAudioProperty(ao->i_stream_id,
 751                                        kAudioStreamPropertyPhysicalFormat,
 752                                        sizeof(ao->sfmt_revert), &ao->sfmt_revert);
 753                 if (err != noErr)
 754                 {
 755                     ao_msg(MSGT_AO, MSGL_WARN,
 756                            "Could not retrieve the original stream format: [%4.4s]\n",
 757                            (char *)&err);
 758                     free(p_format_list);
 759                     continue;
 760                 }
 761                 ao->b_revert = 1;
 762             }
 763
 764             for (j = 0; j < i_formats; ++j)
 765                 if (p_format_list[j].mFormat.mFormatID == 'IAC3'               ||
 766                     p_format_list[j].mFormat.mFormatID == 'iac3'               ||
 767                     p_format_list[j].mFormat.mFormatID == kAudioFormat60958AC3 ||
 768                     p_format_list[j].mFormat.mFormatID == kAudioFormatAC3)
 769                 {
 770                    if (p_format_list[j].mFormat.mSampleRate == ao->stream_format.mSampleRate)
 771                     {
 772                         i_requested_rate_format = j;
 773                         break;
 774                     }
 775                     if (p_format_list[j].mFormat.mSampleRate == ao->sfmt_revert.mSampleRate)
 776                         i_current_rate_format = j;
 777                     else if (i_backup_rate_format < 0 || p_format_list[j].mFormat.mSampleRate > p_format_list[i_backup_rate_format].mFormat.mSampleRate)
 778                         i_backup_rate_format = j;
 779                 }
 780
 781             if (i_requested_rate_format >= 0) /* We prefer to output at the samplerate of the original audio. */
 782                 ao->stream_format = p_format_list[i_requested_rate_format].mFormat;
 783             else if (i_current_rate_format >= 0) /* If not possible, we will try to use the current samplerate of the device. */
 784                 ao->stream_format = p_format_list[i_current_rate_format].mFormat;
 785             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). */
 786         }
 787         free(p_format_list);
 788     }
 789     free(p_streams);
 790
 791     if (ao->i_stream_index < 0)
 792     {
 793         ao_msg(MSGT_AO, MSGL_WARN,
 794                "Cannot find any digital output stream format when OpenSPDIF().\n");
 795         goto err_out;
 796     }
 797
 798     print_format(MSGL_V, "original stream format:", &ao->sfmt_revert);
 799
 800     if (!AudioStreamChangeFormat(ao->i_stream_id, ao->stream_format))
 801         goto err_out;
 802
 803     property_address.mSelector = kAudioDevicePropertyDeviceHasChanged;
 804     property_address.mScope    = kAudioObjectPropertyScopeGlobal;
 805     property_address.mElement  = kAudioObjectPropertyElementMaster;
 806
 807     err = AudioObjectAddPropertyListener(ao->i_selected_dev,
 808                                          &property_address,
 809                                          DeviceListener,
 810                                          NULL);
 811     if (err != noErr)
 812         ao_msg(MSGT_AO, MSGL_WARN, "AudioDeviceAddPropertyListener for kAudioDevicePropertyDeviceHasChanged failed: [%4.4s]\n", (char *)&err);
 813
 814
 815     /* FIXME: If output stream is not native byte-order, we need change endian somewhere. */
 816     /*        Although there's no such case reported.                                     */
 817 #if HAVE_BIGENDIAN
 818     if (!(ao->stream_format.mFormatFlags & kAudioFormatFlagIsBigEndian))
 819 #else
 820     /* tell mplayer that we need a byteswap on AC3 streams, */
 821     if (ao->stream_format.mFormatID & kAudioFormat60958AC3)
 822         ao_data.format = AF_FORMAT_AC3_LE;
 823
 824     if (ao->stream_format.mFormatFlags & kAudioFormatFlagIsBigEndian)
 825 #endif
 826         ao_msg(MSGT_AO, MSGL_WARN,
 827                "Output stream has non-native byte order, digital output may fail.\n");
 828
 829     /* For ac3/dts, just use packet size 6144 bytes as chunk size. */
 830     ao->chunk_size = ao->stream_format.mBytesPerPacket;
 831
 832     ao_data.samplerate = ao->stream_format.mSampleRate;
 833     ao_data.channels = ao->stream_format.mChannelsPerFrame;
 834     ao_data.bps = ao_data.samplerate * (ao->stream_format.mBytesPerPacket/ao->stream_format.mFramesPerPacket);
 835     ao_data.outburst = ao->chunk_size;
 836     ao_data.buffersize = ao_data.bps;
 837
 838     ao->num_chunks = (ao_data.bps+ao->chunk_size-1)/ao->chunk_size;
 839     ao->buffer_len = ao->num_chunks * ao->chunk_size;
 840     ao->buffer = av_fifo_alloc(ao->buffer_len);
 841
 842     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);
 843
 844
 845     /* Create IOProc callback. */
 846     err = AudioDeviceCreateIOProcID(ao->i_selected_dev,
 847                                     (AudioDeviceIOProc)RenderCallbackSPDIF,
 848                                     (void *)ao,
 849                                     &ao->renderCallback);
 850
 851     if (err != noErr || ao->renderCallback == NULL)
 852     {
 853         ao_msg(MSGT_AO, MSGL_WARN, "AudioDeviceAddIOProc failed: [%4.4s]\n", (char *)&err);
 854         goto err_out1;
 855     }
 856
 857     reset();
 858
 859     return CONTROL_TRUE;
 860
 861 err_out1:
 862     if (ao->b_revert)
 863         AudioStreamChangeFormat(ao->i_stream_id, ao->sfmt_revert);
 864 err_out:
 865     if (ao->b_changed_mixing && ao->sfmt_revert.mFormatID != kAudioFormat60958AC3)
 866     {
 867         int b_mix = 1;
 868         err = SetAudioProperty(ao->i_selected_dev,
 869                                kAudioDevicePropertySupportsMixing,
 870                                sizeof(int), &b_mix);
 871         if (err != noErr)
 872             ao_msg(MSGT_AO, MSGL_WARN, "failed to set mixmode: [%4.4s]\n",
 873                    (char *)&err);
 874     }
 875     if (ao->i_hog_pid == getpid())
 876     {
 877         ao->i_hog_pid = -1;
 878         err = SetAudioProperty(ao->i_selected_dev,
 879                                kAudioDevicePropertyHogMode,
 880                                sizeof(ao->i_hog_pid), &ao->i_hog_pid);
 881         if (err != noErr)
 882             ao_msg(MSGT_AO, MSGL_WARN, "Could not release hogmode: [%4.4s]\n",
 883                    (char *)&err);
 884     }
 885     av_fifo_free(ao->buffer);
 886     free(ao);
 887     ao = NULL;
 888     return CONTROL_FALSE;
 889 }
 890
 891 /*****************************************************************************
 892  * AudioDeviceSupportsDigital: Check i_dev_id for digital stream support.
 893  *****************************************************************************/
 894 static int AudioDeviceSupportsDigital( AudioDeviceID i_dev_id )
 895 {
 896     UInt32                      i_param_size = 0;
 897     AudioStreamID               *p_streams = NULL;
 898     int                         i = 0, i_streams = 0;
 899     int                         b_return = CONTROL_FALSE;
 900
 901     /* Retrieve all the output streams. */
 902     i_param_size = GetAudioPropertyArray(i_dev_id,
 903                                          kAudioDevicePropertyStreams,
 904                                          kAudioDevicePropertyScopeOutput,
 905                                          (void **)&p_streams);
 906
 907     if (!i_param_size) {
 908         ao_msg(MSGT_AO, MSGL_WARN, "could not get number of streams.\n");
 909         return CONTROL_FALSE;
 910     }
 911
 912     i_streams = i_param_size / sizeof(AudioStreamID);
 913
 914     for (i = 0; i < i_streams; ++i)
 915     {
 916         if (AudioStreamSupportsDigital(p_streams[i]))
 917             b_return = CONTROL_OK;
 918     }
 919
 920     free(p_streams);
 921     return b_return;
 922 }
 923
 924 /*****************************************************************************
 925  * AudioStreamSupportsDigital: Check i_stream_id for digital stream support.
 926  *****************************************************************************/
 927 static int AudioStreamSupportsDigital( AudioStreamID i_stream_id )
 928 {
 929     UInt32 i_param_size;
 930     AudioStreamRangedDescription *p_format_list = NULL;
 931     int i, i_formats, b_return = CONTROL_FALSE;
 932
 933     /* Retrieve all the stream formats supported by each output stream. */
 934     i_param_size = GetGlobalAudioPropertyArray(i_stream_id,
 935                                                kAudioStreamPropertyAvailablePhysicalFormats,
 936                                                (void **)&p_format_list);
 937
 938     if (!i_param_size) {
 939         ao_msg(MSGT_AO, MSGL_WARN, "Could not get number of stream formats.\n");
 940         return CONTROL_FALSE;
 941     }
 942
 943     i_formats = i_param_size / sizeof(AudioStreamRangedDescription);
 944
 945     for (i = 0; i < i_formats; ++i)
 946     {
 947         print_format(MSGL_V, "supported format:", &(p_format_list[i].mFormat));
 948
 949         if (p_format_list[i].mFormat.mFormatID == 'IAC3'               ||
 950             p_format_list[i].mFormat.mFormatID == 'iac3'               ||
 951             p_format_list[i].mFormat.mFormatID == kAudioFormat60958AC3 ||
 952             p_format_list[i].mFormat.mFormatID == kAudioFormatAC3)
 953             b_return = CONTROL_OK;
 954     }
 955
 956     free(p_format_list);
 957     return b_return;
 958 }
 959
 960 /*****************************************************************************
 961  * AudioStreamChangeFormat: Change i_stream_id to change_format
 962  *****************************************************************************/
 963 static int AudioStreamChangeFormat( AudioStreamID i_stream_id, AudioStreamBasicDescription change_format )
 964 {
 965     OSStatus err = noErr;
 966     int i;
 967     AudioObjectPropertyAddress property_address;
 968
 969     static volatile int stream_format_changed;
 970     stream_format_changed = 0;
 971
 972     print_format(MSGL_V, "setting stream format:", &change_format);
 973
 974     /* Install the callback. */
 975     property_address.mSelector = kAudioStreamPropertyPhysicalFormat;
 976     property_address.mScope    = kAudioObjectPropertyScopeGlobal;
 977     property_address.mElement  = kAudioObjectPropertyElementMaster;
 978
 979     err = AudioObjectAddPropertyListener(i_stream_id,
 980                                          &property_address,
 981                                          StreamListener,
 982                                          (void *)&stream_format_changed);
 983     if (err != noErr)
 984     {
 985         ao_msg(MSGT_AO, MSGL_WARN, "AudioStreamAddPropertyListener failed: [%4.4s]\n", (char *)&err);
 986         return CONTROL_FALSE;
 987     }
 988
 989     /* Change the format. */
 990     err = SetAudioProperty(i_stream_id,
 991                            kAudioStreamPropertyPhysicalFormat,
 992                            sizeof(AudioStreamBasicDescription), &change_format);
 993     if (err != noErr)
 994     {
 995         ao_msg(MSGT_AO, MSGL_WARN, "could not set the stream format: [%4.4s]\n", (char *)&err);
 996         return CONTROL_FALSE;
 997     }
 998
 999     /* The AudioStreamSetProperty is not only asynchronious,
1000      * it is also not Atomic, in its behaviour.
1001      * Therefore we check 5 times before we really give up.
1002      * FIXME: failing isn't actually implemented yet. */
1003     for (i = 0; i < 5; ++i)
1004     {
1005         AudioStreamBasicDescription actual_format;
1006         int j;
1007         for (j = 0; !stream_format_changed && j < 50; ++j)
1008             usec_sleep(10000);
1009         if (stream_format_changed)
1010             stream_format_changed = 0;
1011         else
1012             ao_msg(MSGT_AO, MSGL_V, "reached timeout\n" );
1013
1014         err = GetAudioProperty(i_stream_id,
1015                                kAudioStreamPropertyPhysicalFormat,
1016                                sizeof(AudioStreamBasicDescription), &actual_format);
1017
1018         print_format(MSGL_V, "actual format in use:", &actual_format);
1019         if (actual_format.mSampleRate == change_format.mSampleRate &&
1020             actual_format.mFormatID == change_format.mFormatID &&
1021             actual_format.mFramesPerPacket == change_format.mFramesPerPacket)
1022         {
1023             /* The right format is now active. */
1024             break;
1025         }
1026         /* We need to check again. */
1027     }
1028
1029     /* Removing the property listener. */
1030     err = AudioObjectRemovePropertyListener(i_stream_id,
1031                                             &property_address,
1032                                             StreamListener,
1033                                             (void *)&stream_format_changed);
1034     if (err != noErr)
1035     {
1036         ao_msg(MSGT_AO, MSGL_WARN, "AudioStreamRemovePropertyListener failed: [%4.4s]\n", (char *)&err);
1037         return CONTROL_FALSE;
1038     }
1039
1040     return CONTROL_TRUE;
1041 }
1042
1043 /*****************************************************************************
1044  * RenderCallbackSPDIF: callback for SPDIF audio output
1045  *****************************************************************************/
1046 static OSStatus RenderCallbackSPDIF( AudioDeviceID inDevice,
1047                                     const AudioTimeStamp * inNow,
1048                                     const void * inInputData,
1049                                     const AudioTimeStamp * inInputTime,
1050                                     AudioBufferList * outOutputData,
1051                                     const AudioTimeStamp * inOutputTime,
1052                                     void * threadGlobals )
1053 {
1054     int amt = av_fifo_size(ao->buffer);
1055     int req = outOutputData->mBuffers[ao->i_stream_index].mDataByteSize;
1056
1057     if (amt > req)
1058         amt = req;
1059     if (amt)
1060         read_buffer(ao->b_muted ? NULL : (unsigned char *)outOutputData->mBuffers[ao->i_stream_index].mData, amt);
1061
1062     return noErr;
1063 }
1064
1065
1066 static int play(void* output_samples,int num_bytes,int flags)
1067 {
1068     int wrote, b_digital;
1069     SInt32 exit_reason;
1070
1071     // Check whether we need to reset the digital output stream.
1072     if (ao->b_digital && ao->b_stream_format_changed)
1073     {
1074         ao->b_stream_format_changed = 0;
1075         b_digital = AudioStreamSupportsDigital(ao->i_stream_id);
1076         if (b_digital)
1077         {
1078             /* Current stream supports digital format output, let's set it. */
1079             ao_msg(MSGT_AO, MSGL_V,
1080                    "Detected current stream supports digital, try to restore digital output...\n");
1081
1082             if (!AudioStreamChangeFormat(ao->i_stream_id, ao->stream_format))
1083             {
1084                 ao_msg(MSGT_AO, MSGL_WARN, "Restoring digital output failed.\n");
1085             }
1086             else
1087             {
1088                 ao_msg(MSGT_AO, MSGL_WARN, "Restoring digital output succeeded.\n");
1089                 reset();
1090             }
1091         }
1092         else
1093             ao_msg(MSGT_AO, MSGL_V, "Detected current stream does not support digital.\n");
1094     }
1095
1096     wrote=write_buffer(output_samples, num_bytes);
1097     audio_resume();
1098
1099     do {
1100         exit_reason = CFRunLoopRunInMode(kCFRunLoopDefaultMode, 0.01, true);
1101     } while (exit_reason == kCFRunLoopRunHandledSource);
1102
1103     return wrote;
1104 }
1105
1106 /* set variables and buffer to initial state */
1107 static void reset(void)
1108 {
1109   audio_pause();
1110   av_fifo_reset(ao->buffer);
1111 }
1112
1113
1114 /* return available space */
1115 static int get_space(void)
1116 {
1117   return ao->buffer_len - av_fifo_size(ao->buffer);
1118 }
1119
1120
1121 /* return delay until audio is played */
1122 static float get_delay(void)
1123 {
1124   // inaccurate, should also contain the data buffered e.g. by the OS
1125   return (float)av_fifo_size(ao->buffer)/(float)ao_data.bps;
1126 }
1127
1128
1129 /* unload plugin and deregister from coreaudio */
1130 static void uninit(int immed)
1131 {
1132   OSStatus            err = noErr;
1133
1134   if (!immed) {
1135     long long timeleft=(1000000LL*av_fifo_size(ao->buffer))/ao_data.bps;
1136     ao_msg(MSGT_AO,MSGL_DBG2, "%d bytes left @%d bps (%d usec)\n", av_fifo_size(ao->buffer), ao_data.bps, (int)timeleft);
1137     usec_sleep((int)timeleft);
1138   }
1139
1140   if (!ao->b_digital) {
1141       AudioOutputUnitStop(ao->theOutputUnit);
1142       AudioUnitUninitialize(ao->theOutputUnit);
1143       CloseComponent(ao->theOutputUnit);
1144   }
1145   else {
1146       /* Stop device. */
1147       err = AudioDeviceStop(ao->i_selected_dev, ao->renderCallback);
1148       if (err != noErr)
1149           ao_msg(MSGT_AO, MSGL_WARN, "AudioDeviceStop failed: [%4.4s]\n", (char *)&err);
1150
1151       /* Remove IOProc callback. */
1152       err = AudioDeviceDestroyIOProcID(ao->i_selected_dev, ao->renderCallback);
1153       if (err != noErr)
1154           ao_msg(MSGT_AO, MSGL_WARN, "AudioDeviceRemoveIOProc failed: [%4.4s]\n", (char *)&err);
1155
1156       if (ao->b_revert)
1157           AudioStreamChangeFormat(ao->i_stream_id, ao->sfmt_revert);
1158
1159       if (ao->b_changed_mixing && ao->sfmt_revert.mFormatID != kAudioFormat60958AC3)
1160       {
1161           UInt32 b_mix;
1162           Boolean b_writeable = 0;
1163           /* Revert mixable to true if we are allowed to. */
1164           err = IsAudioPropertySettable(ao->i_selected_dev,
1165                                         kAudioDevicePropertySupportsMixing,
1166                                         &b_writeable);
1167           err = GetAudioProperty(ao->i_selected_dev,
1168                                  kAudioDevicePropertySupportsMixing,
1169                                  sizeof(UInt32), &b_mix);
1170           if (err == noErr && b_writeable)
1171           {
1172               b_mix = 1;
1173               err = SetAudioProperty(ao->i_selected_dev,
1174                                      kAudioDevicePropertySupportsMixing,
1175                                      sizeof(UInt32), &b_mix);
1176           }
1177           if (err != noErr)
1178               ao_msg(MSGT_AO, MSGL_WARN, "failed to set mixmode: [%4.4s]\n", (char *)&err);
1179       }
1180       if (ao->i_hog_pid == getpid())
1181       {
1182           ao->i_hog_pid = -1;
1183           err = SetAudioProperty(ao->i_selected_dev,
1184                                  kAudioDevicePropertyHogMode,
1185                                  sizeof(ao->i_hog_pid), &ao->i_hog_pid);
1186           if (err != noErr) ao_msg(MSGT_AO, MSGL_WARN, "Could not release hogmode: [%4.4s]\n", (char *)&err);
1187       }
1188   }
1189
1190   av_fifo_free(ao->buffer);
1191   free(ao);
1192   ao = NULL;
1193 }
1194
1195
1196 /* stop playing, keep buffers (for pause) */
1197 static void audio_pause(void)
1198 {
1199     OSErr err=noErr;
1200
1201     /* Stop callback. */
1202     if (!ao->b_digital)
1203     {
1204         err=AudioOutputUnitStop(ao->theOutputUnit);
1205         if (err != noErr)
1206             ao_msg(MSGT_AO,MSGL_WARN, "AudioOutputUnitStop returned [%4.4s]\n", (char *)&err);
1207     }
1208     else
1209     {
1210         err = AudioDeviceStop(ao->i_selected_dev, ao->renderCallback);
1211         if (err != noErr)
1212             ao_msg(MSGT_AO, MSGL_WARN, "AudioDeviceStop failed: [%4.4s]\n", (char *)&err);
1213     }
1214     ao->paused = 1;
1215 }
1216
1217
1218 /* resume playing, after audio_pause() */
1219 static void audio_resume(void)
1220 {
1221     OSErr err=noErr;
1222
1223     if (!ao->paused)
1224         return;
1225
1226     /* Start callback. */
1227     if (!ao->b_digital)
1228     {
1229         err = AudioOutputUnitStart(ao->theOutputUnit);
1230         if (err != noErr)
1231             ao_msg(MSGT_AO,MSGL_WARN, "AudioOutputUnitStart returned [%4.4s]\n", (char *)&err);
1232     }
1233     else
1234     {
1235         err = AudioDeviceStart(ao->i_selected_dev, ao->renderCallback);
1236         if (err != noErr)
1237             ao_msg(MSGT_AO, MSGL_WARN, "AudioDeviceStart failed: [%4.4s]\n", (char *)&err);
1238     }
1239     ao->paused = 0;
1240 }
1241
1242 /*****************************************************************************
1243  * StreamListener
1244  *****************************************************************************/
1245 static OSStatus StreamListener( AudioObjectID inObjectID,
1246                                 UInt32 inNumberAddresses,
1247                                 const AudioObjectPropertyAddress inAddresses[],
1248                                 void *inClientData )
1249 {
1250     for (int i=0; i < inNumberAddresses; ++i)
1251     {
1252         if (inAddresses[i].mSelector == kAudioStreamPropertyPhysicalFormat) {
1253             ao_msg(MSGT_AO, MSGL_WARN, "got notify kAudioStreamPropertyPhysicalFormat changed.\n");
1254             if (inClientData)
1255                 *(volatile int *)inClientData = 1;
1256             break;
1257         }
1258     }
1259     return noErr;
1260 }
1261
1262 static OSStatus DeviceListener( AudioObjectID inObjectID,
1263                                 UInt32 inNumberAddresses,
1264                                 const AudioObjectPropertyAddress inAddresses[],
1265                                 void *inClientData )
1266 {
1267     for (int i=0; i < inNumberAddresses; ++i)
1268     {
1269         if (inAddresses[i].mSelector == kAudioDevicePropertyDeviceHasChanged) {
1270             ao_msg(MSGT_AO, MSGL_WARN, "got notify kAudioDevicePropertyDeviceHasChanged.\n");
1271             ao->b_stream_format_changed = 1;
1272             break;
1273         }
1274     }
1275     return noErr;
1276 }