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                         int vol = ao->b_muted ? 0 : 100;
 173                         *control_vol = (ao_control_vol_t) {
 174                             .left = vol, .right = vol,
 175                         };
 176                         return CONTROL_TRUE;
 177                 }
 178                 err = AudioUnitGetParameter(ao->theOutputUnit, kHALOutputParam_Volume, kAudioUnitScope_Global, 0, &vol);
 179
 180                 if(err==0) {
 181                         // printf("GET VOL=%f\n", vol);
 182                         control_vol->left=control_vol->right=vol*100.0/4.0;
 183                         return CONTROL_TRUE;
 184                 }
 185                 else {
 186                         ao_msg(MSGT_AO, MSGL_WARN, "could not get HAL output volume: [%4.4s]\n", (char *)&err);
 187                         return CONTROL_FALSE;
 188                 }
 189
 190         case AOCONTROL_SET_VOLUME:
 191                 control_vol = (ao_control_vol_t*)arg;
 192
 193                 if (ao->b_digital) {
 194                         // Digital output can not set volume. Here we have to return true
 195                         // to make mixer forget it. Else mixer will add a soft filter,
 196                         // that's not we expected and the filter not support ac3 stream
 197                         // will cause mplayer die.
 198
 199                         // Although not support set volume, but at least we support mute.
 200                         // MPlayer set mute by set volume to zero, we handle it.
 201                         if (control_vol->left == 0 && control_vol->right == 0)
 202                                 ao->b_muted = 1;
 203                         else
 204                                 ao->b_muted = 0;
 205                         return CONTROL_TRUE;
 206                 }
 207
 208                 vol=(control_vol->left+control_vol->right)*4.0/200.0;
 209                 err = AudioUnitSetParameter(ao->theOutputUnit, kHALOutputParam_Volume, kAudioUnitScope_Global, 0, vol, 0);
 210                 if(err==0) {
 211                         // printf("SET VOL=%f\n", vol);
 212                         return CONTROL_TRUE;
 213                 }
 214                 else {
 215                         ao_msg(MSGT_AO, MSGL_WARN, "could not set HAL output volume: [%4.4s]\n", (char *)&err);
 216                         return CONTROL_FALSE;
 217                 }
 218           /* Everything is currently unimplemented */
 219         default:
 220           return CONTROL_FALSE;
 221         }
 222
 223 }
 224
 225
 226 static void print_format(int lev, const char* str, const AudioStreamBasicDescription *f){
 227     uint32_t flags=(uint32_t) f->mFormatFlags;
 228     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",
 229             str, f->mSampleRate, f->mBitsPerChannel,
 230             (int)(f->mFormatID & 0xff000000) >> 24,
 231             (int)(f->mFormatID & 0x00ff0000) >> 16,
 232             (int)(f->mFormatID & 0x0000ff00) >>  8,
 233             (int)(f->mFormatID & 0x000000ff) >>  0,
 234             f->mFormatFlags, f->mBytesPerPacket,
 235             f->mFramesPerPacket, f->mBytesPerFrame,
 236             f->mChannelsPerFrame,
 237             (flags&kAudioFormatFlagIsFloat) ? "float" : "int",
 238             (flags&kAudioFormatFlagIsBigEndian) ? "BE" : "LE",
 239             (flags&kAudioFormatFlagIsSignedInteger) ? "S" : "U",
 240             (flags&kAudioFormatFlagIsPacked) ? " packed" : "",
 241             (flags&kAudioFormatFlagIsAlignedHigh) ? " aligned" : "",
 242             (flags&kAudioFormatFlagIsNonInterleaved) ? " ni" : "" );
 243 }
 244
 245 static OSStatus GetAudioProperty(AudioObjectID id,
 246                                  AudioObjectPropertySelector selector,
 247                                  UInt32 outSize, void *outData)
 248 {
 249     AudioObjectPropertyAddress property_address;
 250
 251     property_address.mSelector = selector;
 252     property_address.mScope    = kAudioObjectPropertyScopeGlobal;
 253     property_address.mElement  = kAudioObjectPropertyElementMaster;
 254
 255     return AudioObjectGetPropertyData(id, &property_address, 0, NULL, &outSize, outData);
 256 }
 257
 258 static UInt32 GetAudioPropertyArray(AudioObjectID id,
 259                                     AudioObjectPropertySelector selector,
 260                                     AudioObjectPropertyScope scope,
 261                                     void **outData)
 262 {
 263     OSStatus err;
 264     AudioObjectPropertyAddress property_address;
 265     UInt32 i_param_size;
 266
 267     property_address.mSelector = selector;
 268     property_address.mScope    = scope;
 269     property_address.mElement  = kAudioObjectPropertyElementMaster;
 270
 271     err = AudioObjectGetPropertyDataSize(id, &property_address, 0, NULL, &i_param_size);
 272
 273     if (err != noErr)
 274         return 0;
 275
 276     *outData = malloc(i_param_size);
 277
 278
 279     err = AudioObjectGetPropertyData(id, &property_address, 0, NULL, &i_param_size, *outData);
 280
 281     if (err != noErr) {
 282         free(*outData);
 283         return 0;
 284     }
 285
 286     return i_param_size;
 287 }
 288
 289 static UInt32 GetGlobalAudioPropertyArray(AudioObjectID id,
 290                                           AudioObjectPropertySelector selector,
 291                                           void **outData)
 292 {
 293     return GetAudioPropertyArray(id, selector, kAudioObjectPropertyScopeGlobal, outData);
 294 }
 295
 296 static OSStatus GetAudioPropertyString(AudioObjectID id,
 297                                        AudioObjectPropertySelector selector,
 298                                        char **outData)
 299 {
 300     OSStatus err;
 301     AudioObjectPropertyAddress property_address;
 302     UInt32 i_param_size;
 303     CFStringRef string;
 304     CFIndex string_length;
 305
 306     property_address.mSelector = selector;
 307     property_address.mScope    = kAudioObjectPropertyScopeGlobal;
 308     property_address.mElement  = kAudioObjectPropertyElementMaster;
 309
 310     i_param_size = sizeof(CFStringRef);
 311     err = AudioObjectGetPropertyData(id, &property_address, 0, NULL, &i_param_size, &string);
 312     if (err != noErr)
 313         return err;
 314
 315     string_length = CFStringGetMaximumSizeForEncoding(CFStringGetLength(string),
 316                                                       kCFStringEncodingASCII);
 317     *outData = malloc(string_length + 1);
 318     CFStringGetCString(string, *outData, string_length + 1, kCFStringEncodingASCII);
 319
 320     CFRelease(string);
 321
 322     return err;
 323 }
 324
 325 static OSStatus SetAudioProperty(AudioObjectID id,
 326                                  AudioObjectPropertySelector selector,
 327                                  UInt32 inDataSize, void *inData)
 328 {
 329     AudioObjectPropertyAddress property_address;
 330
 331     property_address.mSelector = selector;
 332     property_address.mScope    = kAudioObjectPropertyScopeGlobal;
 333     property_address.mElement  = kAudioObjectPropertyElementMaster;
 334
 335     return AudioObjectSetPropertyData(id, &property_address, 0, NULL, inDataSize, inData);
 336 }
 337
 338 static Boolean IsAudioPropertySettable(AudioObjectID id,
 339                                        AudioObjectPropertySelector selector,
 340                                        Boolean *outData)
 341 {
 342     AudioObjectPropertyAddress property_address;
 343
 344     property_address.mSelector = selector;
 345     property_address.mScope    = kAudioObjectPropertyScopeGlobal;
 346     property_address.mElement  = kAudioObjectPropertyElementMaster;
 347
 348     return AudioObjectIsPropertySettable(id, &property_address, outData);
 349 }
 350
 351 static int AudioDeviceSupportsDigital( AudioDeviceID i_dev_id );
 352 static int AudioStreamSupportsDigital( AudioStreamID i_stream_id );
 353 static int OpenSPDIF(void);
 354 static int AudioStreamChangeFormat( AudioStreamID i_stream_id, AudioStreamBasicDescription change_format );
 355 static OSStatus RenderCallbackSPDIF( AudioDeviceID inDevice,
 356                                     const AudioTimeStamp * inNow,
 357                                     const void * inInputData,
 358                                     const AudioTimeStamp * inInputTime,
 359                                     AudioBufferList * outOutputData,
 360                                     const AudioTimeStamp * inOutputTime,
 361                                     void * threadGlobals );
 362 static OSStatus StreamListener( AudioObjectID inObjectID,
 363                                 UInt32 inNumberAddresses,
 364                                 const AudioObjectPropertyAddress inAddresses[],
 365                                 void *inClientData );
 366 static OSStatus DeviceListener( AudioObjectID inObjectID,
 367                                 UInt32 inNumberAddresses,
 368                                 const AudioObjectPropertyAddress inAddresses[],
 369                                 void *inClientData );
 370
 371 static void print_help(void)
 372 {
 373     OSStatus err;
 374     UInt32 i_param_size;
 375     int num_devices;
 376     AudioDeviceID *devids;
 377     char *device_name;
 378
 379     mp_msg(MSGT_AO, MSGL_FATAL,
 380            "\n-ao coreaudio commandline help:\n"
 381            "Example: mplayer -ao coreaudio:device_id=266\n"
 382            "    open Core Audio with output device ID 266.\n"
 383            "\nOptions:\n"
 384            "    device_id\n"
 385            "        ID of output device to use (0 = default device)\n"
 386            "    help\n"
 387            "        This help including list of available devices.\n"
 388            "\n"
 389            "Available output devices:\n");
 390
 391     i_param_size = GetGlobalAudioPropertyArray(kAudioObjectSystemObject, kAudioHardwarePropertyDevices, (void **)&devids);
 392
 393     if (!i_param_size) {
 394         mp_msg(MSGT_AO, MSGL_FATAL, "Failed to get list of output devices.\n");
 395         return;
 396     }
 397
 398     num_devices = i_param_size / sizeof(AudioDeviceID);
 399
 400     for (int i = 0; i < num_devices; ++i) {
 401         err = GetAudioPropertyString(devids[i], kAudioObjectPropertyName, &device_name);
 402
 403         if (err == noErr) {
 404             mp_msg(MSGT_AO, MSGL_FATAL, "%s (id: %"PRIu32")\n", device_name, devids[i]);
 405             free(device_name);
 406         } else
 407             mp_msg(MSGT_AO, MSGL_FATAL, "Unknown (id: %"PRIu32")\n", devids[i]);
 408     }
 409
 410     mp_msg(MSGT_AO, MSGL_FATAL, "\n");
 411
 412     free(devids);
 413 }
 414
 415 static int init(int rate,int channels,int format,int flags)
 416 {
 417 AudioStreamBasicDescription inDesc;
 418 ComponentDescription desc;
 419 Component comp;
 420 AURenderCallbackStruct renderCallback;
 421 OSStatus err;
 422 UInt32 size, maxFrames, b_alive;
 423 char *psz_name;
 424 AudioDeviceID devid_def = 0;
 425 int device_id, display_help = 0;
 426
 427     const opt_t subopts[] = {
 428         {"device_id", OPT_ARG_INT,  &device_id,    NULL},
 429         {"help",      OPT_ARG_BOOL, &display_help, NULL},
 430         {NULL}
 431     };
 432
 433     // set defaults
 434     device_id = 0;
 435
 436     if (subopt_parse(ao_subdevice, subopts) != 0 || display_help) {
 437         print_help();
 438         if (!display_help)
 439             return 0;
 440     }
 441
 442     ao_msg(MSGT_AO,MSGL_V, "init([%dHz][%dch][%s][%d])\n", rate, channels, af_fmt2str_short(format), flags);
 443
 444     ao = calloc(1, sizeof(ao_coreaudio_t));
 445
 446     ao->i_selected_dev = 0;
 447     ao->b_supports_digital = 0;
 448     ao->b_digital = 0;
 449     ao->b_muted = 0;
 450     ao->b_stream_format_changed = 0;
 451     ao->i_hog_pid = -1;
 452     ao->i_stream_id = 0;
 453     ao->i_stream_index = -1;
 454     ao->b_revert = 0;
 455     ao->b_changed_mixing = 0;
 456
 457     global_ao->no_persistent_volume = true;
 458
 459     if (device_id == 0) {
 460         /* Find the ID of the default Device. */
 461         err = GetAudioProperty(kAudioObjectSystemObject,
 462                                kAudioHardwarePropertyDefaultOutputDevice,
 463                                sizeof(UInt32), &devid_def);
 464         if (err != noErr)
 465         {
 466             ao_msg(MSGT_AO, MSGL_WARN, "could not get default audio device: [%4.4s]\n", (char *)&err);
 467             goto err_out;
 468         }
 469     } else {
 470         devid_def = device_id;
 471     }
 472
 473     /* Retrieve the name of the device. */
 474     err = GetAudioPropertyString(devid_def,
 475                                  kAudioObjectPropertyName,
 476                                  &psz_name);
 477     if (err != noErr)
 478     {
 479         ao_msg(MSGT_AO, MSGL_WARN, "could not get default audio device name: [%4.4s]\n", (char *)&err);
 480         goto err_out;
 481     }
 482
 483     ao_msg(MSGT_AO,MSGL_V, "got audio output device ID: %"PRIu32" Name: %s\n", devid_def, psz_name );
 484
 485     /* Probe whether device support S/PDIF stream output if input is AC3 stream. */
 486     if (AF_FORMAT_IS_AC3(format)) {
 487         if (AudioDeviceSupportsDigital(devid_def))
 488         {
 489             ao->b_supports_digital = 1;
 490         }
 491         ao_msg(MSGT_AO, MSGL_V,
 492                "probe default audio output device about support for digital s/pdif output: %d\n",
 493                ao->b_supports_digital );
 494     }
 495
 496     free(psz_name);
 497
 498     // Save selected device id
 499     ao->i_selected_dev = devid_def;
 500
 501         // Build Description for the input format
 502         inDesc.mSampleRate=rate;
 503         inDesc.mFormatID=ao->b_supports_digital ? kAudioFormat60958AC3 : kAudioFormatLinearPCM;
 504         inDesc.mChannelsPerFrame=channels;
 505         inDesc.mBitsPerChannel=af_fmt2bits(format);
 506
 507     if((format&AF_FORMAT_POINT_MASK)==AF_FORMAT_F) {
 508         // float
 509                 inDesc.mFormatFlags = kAudioFormatFlagIsFloat|kAudioFormatFlagIsPacked;
 510     }
 511     else if((format&AF_FORMAT_SIGN_MASK)==AF_FORMAT_SI) {
 512         // signed int
 513                 inDesc.mFormatFlags = kAudioFormatFlagIsSignedInteger|kAudioFormatFlagIsPacked;
 514     }
 515     else {
 516         // unsigned int
 517                 inDesc.mFormatFlags = kAudioFormatFlagIsPacked;
 518     }
 519     if ((format & AF_FORMAT_END_MASK) == AF_FORMAT_BE)
 520         inDesc.mFormatFlags |= kAudioFormatFlagIsBigEndian;
 521
 522     inDesc.mFramesPerPacket = 1;
 523     ao->packetSize = inDesc.mBytesPerPacket = inDesc.mBytesPerFrame = inDesc.mFramesPerPacket*channels*(inDesc.mBitsPerChannel/8);
 524     print_format(MSGL_V, "source:",&inDesc);
 525
 526     if (ao->b_supports_digital)
 527     {
 528         b_alive = 1;
 529         err = GetAudioProperty(ao->i_selected_dev,
 530                                kAudioDevicePropertyDeviceIsAlive,
 531                                sizeof(UInt32), &b_alive);
 532         if (err != noErr)
 533             ao_msg(MSGT_AO, MSGL_WARN, "could not check whether device is alive: [%4.4s]\n", (char *)&err);
 534         if (!b_alive)
 535             ao_msg(MSGT_AO, MSGL_WARN, "device is not alive\n" );
 536
 537         /* S/PDIF output need device in HogMode. */
 538         err = GetAudioProperty(ao->i_selected_dev,
 539                                kAudioDevicePropertyHogMode,
 540                                sizeof(pid_t), &ao->i_hog_pid);
 541         if (err != noErr)
 542         {
 543             /* This is not a fatal error. Some drivers simply don't support this property. */
 544             ao_msg(MSGT_AO, MSGL_WARN, "could not check whether device is hogged: [%4.4s]\n",
 545                      (char *)&err);
 546             ao->i_hog_pid = -1;
 547         }
 548
 549         if (ao->i_hog_pid != -1 && ao->i_hog_pid != getpid())
 550         {
 551             ao_msg(MSGT_AO, MSGL_WARN, "Selected audio device is exclusively in use by another program.\n" );
 552             goto err_out;
 553         }
 554         ao->stream_format = inDesc;
 555         return OpenSPDIF();
 556     }
 557
 558         /* original analog output code */
 559         desc.componentType = kAudioUnitType_Output;
 560         desc.componentSubType = (device_id == 0) ? kAudioUnitSubType_DefaultOutput : kAudioUnitSubType_HALOutput;
 561         desc.componentManufacturer = kAudioUnitManufacturer_Apple;
 562         desc.componentFlags = 0;
 563         desc.componentFlagsMask = 0;
 564
 565         comp = FindNextComponent(NULL, &desc);  //Finds an component that meets the desc spec's
 566         if (comp == NULL) {
 567                 ao_msg(MSGT_AO, MSGL_WARN, "Unable to find Output Unit component\n");
 568                 goto err_out;
 569         }
 570
 571         err = OpenAComponent(comp, &(ao->theOutputUnit));  //gains access to the services provided by the component
 572         if (err) {
 573                 ao_msg(MSGT_AO, MSGL_WARN, "Unable to open Output Unit component: [%4.4s]\n", (char *)&err);
 574                 goto err_out;
 575         }
 576
 577         // Initialize AudioUnit
 578         err = AudioUnitInitialize(ao->theOutputUnit);
 579         if (err) {
 580                 ao_msg(MSGT_AO, MSGL_WARN, "Unable to initialize Output Unit component: [%4.4s]\n", (char *)&err);
 581                 goto err_out1;
 582         }
 583
 584         size =  sizeof(AudioStreamBasicDescription);
 585         err = AudioUnitSetProperty(ao->theOutputUnit, kAudioUnitProperty_StreamFormat, kAudioUnitScope_Input, 0, &inDesc, size);
 586
 587         if (err) {
 588                 ao_msg(MSGT_AO, MSGL_WARN, "Unable to set the input format: [%4.4s]\n", (char *)&err);
 589                 goto err_out2;
 590         }
 591
 592         size = sizeof(UInt32);
 593         err = AudioUnitGetProperty(ao->theOutputUnit, kAudioDevicePropertyBufferSize, kAudioUnitScope_Input, 0, &maxFrames, &size);
 594
 595         if (err)
 596         {
 597                 ao_msg(MSGT_AO,MSGL_WARN, "AudioUnitGetProperty returned [%4.4s] when getting kAudioDevicePropertyBufferSize\n", (char *)&err);
 598                 goto err_out2;
 599         }
 600
 601         //Set the Current Device to the Default Output Unit.
 602     err = AudioUnitSetProperty(ao->theOutputUnit, kAudioOutputUnitProperty_CurrentDevice, kAudioUnitScope_Global, 0, &ao->i_selected_dev, sizeof(ao->i_selected_dev));
 603
 604         ao->chunk_size = maxFrames;//*inDesc.mBytesPerFrame;
 605
 606         ao_data.samplerate = inDesc.mSampleRate;
 607         ao_data.channels = inDesc.mChannelsPerFrame;
 608     ao_data.bps = ao_data.samplerate * inDesc.mBytesPerFrame;
 609     ao_data.outburst = ao->chunk_size;
 610         ao_data.buffersize = ao_data.bps;
 611
 612         ao->num_chunks = (ao_data.bps+ao->chunk_size-1)/ao->chunk_size;
 613     ao->buffer_len = ao->num_chunks * ao->chunk_size;
 614     ao->buffer = av_fifo_alloc(ao->buffer_len);
 615
 616         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);
 617
 618     renderCallback.inputProc = theRenderProc;
 619     renderCallback.inputProcRefCon = 0;
 620     err = AudioUnitSetProperty(ao->theOutputUnit, kAudioUnitProperty_SetRenderCallback, kAudioUnitScope_Input, 0, &renderCallback, sizeof(AURenderCallbackStruct));
 621         if (err) {
 622                 ao_msg(MSGT_AO, MSGL_WARN, "Unable to set the render callback: [%4.4s]\n", (char *)&err);
 623                 goto err_out2;
 624         }
 625
 626         reset();
 627
 628     return CONTROL_OK;
 629
 630 err_out2:
 631     AudioUnitUninitialize(ao->theOutputUnit);
 632 err_out1:
 633     CloseComponent(ao->theOutputUnit);
 634 err_out:
 635     av_fifo_free(ao->buffer);
 636     free(ao);
 637     ao = NULL;
 638     return CONTROL_FALSE;
 639 }
 640
 641 /*****************************************************************************
 642  * Setup a encoded digital stream (SPDIF)
 643  *****************************************************************************/
 644 static int OpenSPDIF(void)
 645 {
 646     OSStatus                    err = noErr;
 647     UInt32                      i_param_size, b_mix = 0;
 648     Boolean                     b_writeable = 0;
 649     AudioStreamID               *p_streams = NULL;
 650     int                         i, i_streams = 0;
 651     AudioObjectPropertyAddress  property_address;
 652
 653     /* Start doing the SPDIF setup process. */
 654     ao->b_digital = 1;
 655
 656     /* Hog the device. */
 657     ao->i_hog_pid = getpid() ;
 658
 659     err = SetAudioProperty(ao->i_selected_dev,
 660                            kAudioDevicePropertyHogMode,
 661                            sizeof(ao->i_hog_pid), &ao->i_hog_pid);
 662     if (err != noErr)
 663     {
 664         ao_msg(MSGT_AO, MSGL_WARN, "failed to set hogmode: [%4.4s]\n", (char *)&err);
 665         ao->i_hog_pid = -1;
 666         goto err_out;
 667     }
 668
 669     property_address.mSelector = kAudioDevicePropertySupportsMixing;
 670     property_address.mScope    = kAudioObjectPropertyScopeGlobal;
 671     property_address.mElement  = kAudioObjectPropertyElementMaster;
 672
 673     /* Set mixable to false if we are allowed to. */
 674     if (AudioObjectHasProperty(ao->i_selected_dev, &property_address)) {
 675         /* Set mixable to false if we are allowed to. */
 676         err = IsAudioPropertySettable(ao->i_selected_dev,
 677                                       kAudioDevicePropertySupportsMixing,
 678                                       &b_writeable);
 679         err = GetAudioProperty(ao->i_selected_dev,
 680                                kAudioDevicePropertySupportsMixing,
 681                                sizeof(UInt32), &b_mix);
 682         if (err == noErr && b_writeable)
 683         {
 684             b_mix = 0;
 685             err = SetAudioProperty(ao->i_selected_dev,
 686                                    kAudioDevicePropertySupportsMixing,
 687                                    sizeof(UInt32), &b_mix);
 688             ao->b_changed_mixing = 1;
 689         }
 690         if (err != noErr)
 691         {
 692             ao_msg(MSGT_AO, MSGL_WARN, "failed to set mixmode: [%4.4s]\n", (char *)&err);
 693             goto err_out;
 694         }
 695     }
 696
 697     /* Get a list of all the streams on this device. */
 698     i_param_size = GetAudioPropertyArray(ao->i_selected_dev,
 699                                          kAudioDevicePropertyStreams,
 700                                          kAudioDevicePropertyScopeOutput,
 701                                          (void **)&p_streams);
 702
 703     if (!i_param_size) {
 704         ao_msg(MSGT_AO, MSGL_WARN, "could not get number of streams.\n");
 705         goto err_out;
 706     }
 707
 708     i_streams = i_param_size / sizeof(AudioStreamID);
 709
 710     ao_msg(MSGT_AO, MSGL_V, "current device stream number: %d\n", i_streams);
 711
 712     for (i = 0; i < i_streams && ao->i_stream_index < 0; ++i)
 713     {
 714         /* Find a stream with a cac3 stream. */
 715         AudioStreamRangedDescription *p_format_list = NULL;
 716         int i_formats = 0, j = 0, b_digital = 0;
 717
 718         i_param_size = GetGlobalAudioPropertyArray(p_streams[i],
 719                                                    kAudioStreamPropertyAvailablePhysicalFormats,
 720                                                    (void **)&p_format_list);
 721
 722         if (!i_param_size) {
 723             ao_msg(MSGT_AO, MSGL_WARN,
 724                    "Could not get number of stream formats.\n");
 725             continue;
 726         }
 727
 728         i_formats = i_param_size / sizeof(AudioStreamRangedDescription);
 729
 730         /* Check if one of the supported formats is a digital format. */
 731         for (j = 0; j < i_formats; ++j)
 732         {
 733             if (p_format_list[j].mFormat.mFormatID == 'IAC3'               ||
 734                 p_format_list[j].mFormat.mFormatID == 'iac3'               ||
 735                 p_format_list[j].mFormat.mFormatID == kAudioFormat60958AC3 ||
 736                 p_format_list[j].mFormat.mFormatID == kAudioFormatAC3)
 737             {
 738                 b_digital = 1;
 739                 break;
 740             }
 741         }
 742
 743         if (b_digital)
 744         {
 745             /* If this stream supports a digital (cac3) format, then set it. */
 746             int i_requested_rate_format = -1;
 747             int i_current_rate_format = -1;
 748             int i_backup_rate_format = -1;
 749
 750             ao->i_stream_id = p_streams[i];
 751             ao->i_stream_index = i;
 752
 753             if (ao->b_revert == 0)
 754             {
 755                 /* Retrieve the original format of this stream first if not done so already. */
 756                 err = GetAudioProperty(ao->i_stream_id,
 757                                        kAudioStreamPropertyPhysicalFormat,
 758                                        sizeof(ao->sfmt_revert), &ao->sfmt_revert);
 759                 if (err != noErr)
 760                 {
 761                     ao_msg(MSGT_AO, MSGL_WARN,
 762                            "Could not retrieve the original stream format: [%4.4s]\n",
 763                            (char *)&err);
 764                     free(p_format_list);
 765                     continue;
 766                 }
 767                 ao->b_revert = 1;
 768             }
 769
 770             for (j = 0; j < i_formats; ++j)
 771                 if (p_format_list[j].mFormat.mFormatID == 'IAC3'               ||
 772                     p_format_list[j].mFormat.mFormatID == 'iac3'               ||
 773                     p_format_list[j].mFormat.mFormatID == kAudioFormat60958AC3 ||
 774                     p_format_list[j].mFormat.mFormatID == kAudioFormatAC3)
 775                 {
 776                    if (p_format_list[j].mFormat.mSampleRate == ao->stream_format.mSampleRate)
 777                     {
 778                         i_requested_rate_format = j;
 779                         break;
 780                     }
 781                     if (p_format_list[j].mFormat.mSampleRate == ao->sfmt_revert.mSampleRate)
 782                         i_current_rate_format = j;
 783                     else if (i_backup_rate_format < 0 || p_format_list[j].mFormat.mSampleRate > p_format_list[i_backup_rate_format].mFormat.mSampleRate)
 784                         i_backup_rate_format = j;
 785                 }
 786
 787             if (i_requested_rate_format >= 0) /* We prefer to output at the samplerate of the original audio. */
 788                 ao->stream_format = p_format_list[i_requested_rate_format].mFormat;
 789             else if (i_current_rate_format >= 0) /* If not possible, we will try to use the current samplerate of the device. */
 790                 ao->stream_format = p_format_list[i_current_rate_format].mFormat;
 791             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). */
 792         }
 793         free(p_format_list);
 794     }
 795     free(p_streams);
 796
 797     if (ao->i_stream_index < 0)
 798     {
 799         ao_msg(MSGT_AO, MSGL_WARN,
 800                "Cannot find any digital output stream format when OpenSPDIF().\n");
 801         goto err_out;
 802     }
 803
 804     print_format(MSGL_V, "original stream format:", &ao->sfmt_revert);
 805
 806     if (!AudioStreamChangeFormat(ao->i_stream_id, ao->stream_format))
 807         goto err_out;
 808
 809     property_address.mSelector = kAudioDevicePropertyDeviceHasChanged;
 810     property_address.mScope    = kAudioObjectPropertyScopeGlobal;
 811     property_address.mElement  = kAudioObjectPropertyElementMaster;
 812
 813     err = AudioObjectAddPropertyListener(ao->i_selected_dev,
 814                                          &property_address,
 815                                          DeviceListener,
 816                                          NULL);
 817     if (err != noErr)
 818         ao_msg(MSGT_AO, MSGL_WARN, "AudioDeviceAddPropertyListener for kAudioDevicePropertyDeviceHasChanged failed: [%4.4s]\n", (char *)&err);
 819
 820
 821     /* FIXME: If output stream is not native byte-order, we need change endian somewhere. */
 822     /*        Although there's no such case reported.                                     */
 823 #if HAVE_BIGENDIAN
 824     if (!(ao->stream_format.mFormatFlags & kAudioFormatFlagIsBigEndian))
 825 #else
 826     /* tell mplayer that we need a byteswap on AC3 streams, */
 827     if (ao->stream_format.mFormatID & kAudioFormat60958AC3)
 828         ao_data.format = AF_FORMAT_AC3_LE;
 829
 830     if (ao->stream_format.mFormatFlags & kAudioFormatFlagIsBigEndian)
 831 #endif
 832         ao_msg(MSGT_AO, MSGL_WARN,
 833                "Output stream has non-native byte order, digital output may fail.\n");
 834
 835     /* For ac3/dts, just use packet size 6144 bytes as chunk size. */
 836     ao->chunk_size = ao->stream_format.mBytesPerPacket;
 837
 838     ao_data.samplerate = ao->stream_format.mSampleRate;
 839     ao_data.channels = ao->stream_format.mChannelsPerFrame;
 840     ao_data.bps = ao_data.samplerate * (ao->stream_format.mBytesPerPacket/ao->stream_format.mFramesPerPacket);
 841     ao_data.outburst = ao->chunk_size;
 842     ao_data.buffersize = ao_data.bps;
 843
 844     ao->num_chunks = (ao_data.bps+ao->chunk_size-1)/ao->chunk_size;
 845     ao->buffer_len = ao->num_chunks * ao->chunk_size;
 846     ao->buffer = av_fifo_alloc(ao->buffer_len);
 847
 848     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);
 849
 850
 851     /* Create IOProc callback. */
 852     err = AudioDeviceCreateIOProcID(ao->i_selected_dev,
 853                                     (AudioDeviceIOProc)RenderCallbackSPDIF,
 854                                     (void *)ao,
 855                                     &ao->renderCallback);
 856
 857     if (err != noErr || ao->renderCallback == NULL)
 858     {
 859         ao_msg(MSGT_AO, MSGL_WARN, "AudioDeviceAddIOProc failed: [%4.4s]\n", (char *)&err);
 860         goto err_out1;
 861     }
 862
 863     reset();
 864
 865     return CONTROL_TRUE;
 866
 867 err_out1:
 868     if (ao->b_revert)
 869         AudioStreamChangeFormat(ao->i_stream_id, ao->sfmt_revert);
 870 err_out:
 871     if (ao->b_changed_mixing && ao->sfmt_revert.mFormatID != kAudioFormat60958AC3)
 872     {
 873         int b_mix = 1;
 874         err = SetAudioProperty(ao->i_selected_dev,
 875                                kAudioDevicePropertySupportsMixing,
 876                                sizeof(int), &b_mix);
 877         if (err != noErr)
 878             ao_msg(MSGT_AO, MSGL_WARN, "failed to set mixmode: [%4.4s]\n",
 879                    (char *)&err);
 880     }
 881     if (ao->i_hog_pid == getpid())
 882     {
 883         ao->i_hog_pid = -1;
 884         err = SetAudioProperty(ao->i_selected_dev,
 885                                kAudioDevicePropertyHogMode,
 886                                sizeof(ao->i_hog_pid), &ao->i_hog_pid);
 887         if (err != noErr)
 888             ao_msg(MSGT_AO, MSGL_WARN, "Could not release hogmode: [%4.4s]\n",
 889                    (char *)&err);
 890     }
 891     av_fifo_free(ao->buffer);
 892     free(ao);
 893     ao = NULL;
 894     return CONTROL_FALSE;
 895 }
 896
 897 /*****************************************************************************
 898  * AudioDeviceSupportsDigital: Check i_dev_id for digital stream support.
 899  *****************************************************************************/
 900 static int AudioDeviceSupportsDigital( AudioDeviceID i_dev_id )
 901 {
 902     UInt32                      i_param_size = 0;
 903     AudioStreamID               *p_streams = NULL;
 904     int                         i = 0, i_streams = 0;
 905     int                         b_return = CONTROL_FALSE;
 906
 907     /* Retrieve all the output streams. */
 908     i_param_size = GetAudioPropertyArray(i_dev_id,
 909                                          kAudioDevicePropertyStreams,
 910                                          kAudioDevicePropertyScopeOutput,
 911                                          (void **)&p_streams);
 912
 913     if (!i_param_size) {
 914         ao_msg(MSGT_AO, MSGL_WARN, "could not get number of streams.\n");
 915         return CONTROL_FALSE;
 916     }
 917
 918     i_streams = i_param_size / sizeof(AudioStreamID);
 919
 920     for (i = 0; i < i_streams; ++i)
 921     {
 922         if (AudioStreamSupportsDigital(p_streams[i]))
 923             b_return = CONTROL_OK;
 924     }
 925
 926     free(p_streams);
 927     return b_return;
 928 }
 929
 930 /*****************************************************************************
 931  * AudioStreamSupportsDigital: Check i_stream_id for digital stream support.
 932  *****************************************************************************/
 933 static int AudioStreamSupportsDigital( AudioStreamID i_stream_id )
 934 {
 935     UInt32 i_param_size;
 936     AudioStreamRangedDescription *p_format_list = NULL;
 937     int i, i_formats, b_return = CONTROL_FALSE;
 938
 939     /* Retrieve all the stream formats supported by each output stream. */
 940     i_param_size = GetGlobalAudioPropertyArray(i_stream_id,
 941                                                kAudioStreamPropertyAvailablePhysicalFormats,
 942                                                (void **)&p_format_list);
 943
 944     if (!i_param_size) {
 945         ao_msg(MSGT_AO, MSGL_WARN, "Could not get number of stream formats.\n");
 946         return CONTROL_FALSE;
 947     }
 948
 949     i_formats = i_param_size / sizeof(AudioStreamRangedDescription);
 950
 951     for (i = 0; i < i_formats; ++i)
 952     {
 953         print_format(MSGL_V, "supported format:", &(p_format_list[i].mFormat));
 954
 955         if (p_format_list[i].mFormat.mFormatID == 'IAC3'               ||
 956             p_format_list[i].mFormat.mFormatID == 'iac3'               ||
 957             p_format_list[i].mFormat.mFormatID == kAudioFormat60958AC3 ||
 958             p_format_list[i].mFormat.mFormatID == kAudioFormatAC3)
 959             b_return = CONTROL_OK;
 960     }
 961
 962     free(p_format_list);
 963     return b_return;
 964 }
 965
 966 /*****************************************************************************
 967  * AudioStreamChangeFormat: Change i_stream_id to change_format
 968  *****************************************************************************/
 969 static int AudioStreamChangeFormat( AudioStreamID i_stream_id, AudioStreamBasicDescription change_format )
 970 {
 971     OSStatus err = noErr;
 972     int i;
 973     AudioObjectPropertyAddress property_address;
 974
 975     static volatile int stream_format_changed;
 976     stream_format_changed = 0;
 977
 978     print_format(MSGL_V, "setting stream format:", &change_format);
 979
 980     /* Install the callback. */
 981     property_address.mSelector = kAudioStreamPropertyPhysicalFormat;
 982     property_address.mScope    = kAudioObjectPropertyScopeGlobal;
 983     property_address.mElement  = kAudioObjectPropertyElementMaster;
 984
 985     err = AudioObjectAddPropertyListener(i_stream_id,
 986                                          &property_address,
 987                                          StreamListener,
 988                                          (void *)&stream_format_changed);
 989     if (err != noErr)
 990     {
 991         ao_msg(MSGT_AO, MSGL_WARN, "AudioStreamAddPropertyListener failed: [%4.4s]\n", (char *)&err);
 992         return CONTROL_FALSE;
 993     }
 994
 995     /* Change the format. */
 996     err = SetAudioProperty(i_stream_id,
 997                            kAudioStreamPropertyPhysicalFormat,
 998                            sizeof(AudioStreamBasicDescription), &change_format);
 999     if (err != noErr)
1000     {
1001         ao_msg(MSGT_AO, MSGL_WARN, "could not set the stream format: [%4.4s]\n", (char *)&err);
1002         return CONTROL_FALSE;
1003     }
1004
1005     /* The AudioStreamSetProperty is not only asynchronious,
1006      * it is also not Atomic, in its behaviour.
1007      * Therefore we check 5 times before we really give up.
1008      * FIXME: failing isn't actually implemented yet. */
1009     for (i = 0; i < 5; ++i)
1010     {
1011         AudioStreamBasicDescription actual_format;
1012         int j;
1013         for (j = 0; !stream_format_changed && j < 50; ++j)
1014             usec_sleep(10000);
1015         if (stream_format_changed)
1016             stream_format_changed = 0;
1017         else
1018             ao_msg(MSGT_AO, MSGL_V, "reached timeout\n" );
1019
1020         err = GetAudioProperty(i_stream_id,
1021                                kAudioStreamPropertyPhysicalFormat,
1022                                sizeof(AudioStreamBasicDescription), &actual_format);
1023
1024         print_format(MSGL_V, "actual format in use:", &actual_format);
1025         if (actual_format.mSampleRate == change_format.mSampleRate &&
1026             actual_format.mFormatID == change_format.mFormatID &&
1027             actual_format.mFramesPerPacket == change_format.mFramesPerPacket)
1028         {
1029             /* The right format is now active. */
1030             break;
1031         }
1032         /* We need to check again. */
1033     }
1034
1035     /* Removing the property listener. */
1036     err = AudioObjectRemovePropertyListener(i_stream_id,
1037                                             &property_address,
1038                                             StreamListener,
1039                                             (void *)&stream_format_changed);
1040     if (err != noErr)
1041     {
1042         ao_msg(MSGT_AO, MSGL_WARN, "AudioStreamRemovePropertyListener failed: [%4.4s]\n", (char *)&err);
1043         return CONTROL_FALSE;
1044     }
1045
1046     return CONTROL_TRUE;
1047 }
1048
1049 /*****************************************************************************
1050  * RenderCallbackSPDIF: callback for SPDIF audio output
1051  *****************************************************************************/
1052 static OSStatus RenderCallbackSPDIF( AudioDeviceID inDevice,
1053                                     const AudioTimeStamp * inNow,
1054                                     const void * inInputData,
1055                                     const AudioTimeStamp * inInputTime,
1056                                     AudioBufferList * outOutputData,
1057                                     const AudioTimeStamp * inOutputTime,
1058                                     void * threadGlobals )
1059 {
1060     int amt = av_fifo_size(ao->buffer);
1061     int req = outOutputData->mBuffers[ao->i_stream_index].mDataByteSize;
1062
1063     if (amt > req)
1064         amt = req;
1065     if (amt)
1066         read_buffer(ao->b_muted ? NULL : (unsigned char *)outOutputData->mBuffers[ao->i_stream_index].mData, amt);
1067
1068     return noErr;
1069 }
1070
1071
1072 static int play(void* output_samples,int num_bytes,int flags)
1073 {
1074     int wrote, b_digital;
1075     SInt32 exit_reason;
1076
1077     // Check whether we need to reset the digital output stream.
1078     if (ao->b_digital && ao->b_stream_format_changed)
1079     {
1080         ao->b_stream_format_changed = 0;
1081         b_digital = AudioStreamSupportsDigital(ao->i_stream_id);
1082         if (b_digital)
1083         {
1084             /* Current stream supports digital format output, let's set it. */
1085             ao_msg(MSGT_AO, MSGL_V,
1086                    "Detected current stream supports digital, try to restore digital output...\n");
1087
1088             if (!AudioStreamChangeFormat(ao->i_stream_id, ao->stream_format))
1089             {
1090                 ao_msg(MSGT_AO, MSGL_WARN, "Restoring digital output failed.\n");
1091             }
1092             else
1093             {
1094                 ao_msg(MSGT_AO, MSGL_WARN, "Restoring digital output succeeded.\n");
1095                 reset();
1096             }
1097         }
1098         else
1099             ao_msg(MSGT_AO, MSGL_V, "Detected current stream does not support digital.\n");
1100     }
1101
1102     wrote=write_buffer(output_samples, num_bytes);
1103     audio_resume();
1104
1105     do {
1106         exit_reason = CFRunLoopRunInMode(kCFRunLoopDefaultMode, 0.01, true);
1107     } while (exit_reason == kCFRunLoopRunHandledSource);
1108
1109     return wrote;
1110 }
1111
1112 /* set variables and buffer to initial state */
1113 static void reset(void)
1114 {
1115   audio_pause();
1116   av_fifo_reset(ao->buffer);
1117 }
1118
1119
1120 /* return available space */
1121 static int get_space(void)
1122 {
1123   return ao->buffer_len - av_fifo_size(ao->buffer);
1124 }
1125
1126
1127 /* return delay until audio is played */
1128 static float get_delay(void)
1129 {
1130   // inaccurate, should also contain the data buffered e.g. by the OS
1131   return (float)av_fifo_size(ao->buffer)/(float)ao_data.bps;
1132 }
1133
1134
1135 /* unload plugin and deregister from coreaudio */
1136 static void uninit(int immed)
1137 {
1138   OSStatus            err = noErr;
1139
1140   if (!immed) {
1141     long long timeleft=(1000000LL*av_fifo_size(ao->buffer))/ao_data.bps;
1142     ao_msg(MSGT_AO,MSGL_DBG2, "%d bytes left @%d bps (%d usec)\n", av_fifo_size(ao->buffer), ao_data.bps, (int)timeleft);
1143     usec_sleep((int)timeleft);
1144   }
1145
1146   if (!ao->b_digital) {
1147       AudioOutputUnitStop(ao->theOutputUnit);
1148       AudioUnitUninitialize(ao->theOutputUnit);
1149       CloseComponent(ao->theOutputUnit);
1150   }
1151   else {
1152       /* Stop device. */
1153       err = AudioDeviceStop(ao->i_selected_dev, ao->renderCallback);
1154       if (err != noErr)
1155           ao_msg(MSGT_AO, MSGL_WARN, "AudioDeviceStop failed: [%4.4s]\n", (char *)&err);
1156
1157       /* Remove IOProc callback. */
1158       err = AudioDeviceDestroyIOProcID(ao->i_selected_dev, ao->renderCallback);
1159       if (err != noErr)
1160           ao_msg(MSGT_AO, MSGL_WARN, "AudioDeviceRemoveIOProc failed: [%4.4s]\n", (char *)&err);
1161
1162       if (ao->b_revert)
1163           AudioStreamChangeFormat(ao->i_stream_id, ao->sfmt_revert);
1164
1165       if (ao->b_changed_mixing && ao->sfmt_revert.mFormatID != kAudioFormat60958AC3)
1166       {
1167           UInt32 b_mix;
1168           Boolean b_writeable = 0;
1169           /* Revert mixable to true if we are allowed to. */
1170           err = IsAudioPropertySettable(ao->i_selected_dev,
1171                                         kAudioDevicePropertySupportsMixing,
1172                                         &b_writeable);
1173           err = GetAudioProperty(ao->i_selected_dev,
1174                                  kAudioDevicePropertySupportsMixing,
1175                                  sizeof(UInt32), &b_mix);
1176           if (err == noErr && b_writeable)
1177           {
1178               b_mix = 1;
1179               err = SetAudioProperty(ao->i_selected_dev,
1180                                      kAudioDevicePropertySupportsMixing,
1181                                      sizeof(UInt32), &b_mix);
1182           }
1183           if (err != noErr)
1184               ao_msg(MSGT_AO, MSGL_WARN, "failed to set mixmode: [%4.4s]\n", (char *)&err);
1185       }
1186       if (ao->i_hog_pid == getpid())
1187       {
1188           ao->i_hog_pid = -1;
1189           err = SetAudioProperty(ao->i_selected_dev,
1190                                  kAudioDevicePropertyHogMode,
1191                                  sizeof(ao->i_hog_pid), &ao->i_hog_pid);
1192           if (err != noErr) ao_msg(MSGT_AO, MSGL_WARN, "Could not release hogmode: [%4.4s]\n", (char *)&err);
1193       }
1194   }
1195
1196   av_fifo_free(ao->buffer);
1197   free(ao);
1198   ao = NULL;
1199 }
1200
1201
1202 /* stop playing, keep buffers (for pause) */
1203 static void audio_pause(void)
1204 {
1205     OSErr err=noErr;
1206
1207     /* Stop callback. */
1208     if (!ao->b_digital)
1209     {
1210         err=AudioOutputUnitStop(ao->theOutputUnit);
1211         if (err != noErr)
1212             ao_msg(MSGT_AO,MSGL_WARN, "AudioOutputUnitStop returned [%4.4s]\n", (char *)&err);
1213     }
1214     else
1215     {
1216         err = AudioDeviceStop(ao->i_selected_dev, ao->renderCallback);
1217         if (err != noErr)
1218             ao_msg(MSGT_AO, MSGL_WARN, "AudioDeviceStop failed: [%4.4s]\n", (char *)&err);
1219     }
1220     ao->paused = 1;
1221 }
1222
1223
1224 /* resume playing, after audio_pause() */
1225 static void audio_resume(void)
1226 {
1227     OSErr err=noErr;
1228
1229     if (!ao->paused)
1230         return;
1231
1232     /* Start callback. */
1233     if (!ao->b_digital)
1234     {
1235         err = AudioOutputUnitStart(ao->theOutputUnit);
1236         if (err != noErr)
1237             ao_msg(MSGT_AO,MSGL_WARN, "AudioOutputUnitStart returned [%4.4s]\n", (char *)&err);
1238     }
1239     else
1240     {
1241         err = AudioDeviceStart(ao->i_selected_dev, ao->renderCallback);
1242         if (err != noErr)
1243             ao_msg(MSGT_AO, MSGL_WARN, "AudioDeviceStart failed: [%4.4s]\n", (char *)&err);
1244     }
1245     ao->paused = 0;
1246 }
1247
1248 /*****************************************************************************
1249  * StreamListener
1250  *****************************************************************************/
1251 static OSStatus StreamListener( AudioObjectID inObjectID,
1252                                 UInt32 inNumberAddresses,
1253                                 const AudioObjectPropertyAddress inAddresses[],
1254                                 void *inClientData )
1255 {
1256     for (int i=0; i < inNumberAddresses; ++i)
1257     {
1258         if (inAddresses[i].mSelector == kAudioStreamPropertyPhysicalFormat) {
1259             ao_msg(MSGT_AO, MSGL_WARN, "got notify kAudioStreamPropertyPhysicalFormat changed.\n");
1260             if (inClientData)
1261                 *(volatile int *)inClientData = 1;
1262             break;
1263         }
1264     }
1265     return noErr;
1266 }
1267
1268 static OSStatus DeviceListener( AudioObjectID inObjectID,
1269                                 UInt32 inNumberAddresses,
1270                                 const AudioObjectPropertyAddress inAddresses[],
1271                                 void *inClientData )
1272 {
1273     for (int i=0; i < inNumberAddresses; ++i)
1274     {
1275         if (inAddresses[i].mSelector == kAudioDevicePropertyDeviceHasChanged) {
1276             ao_msg(MSGT_AO, MSGL_WARN, "got notify kAudioDevicePropertyDeviceHasChanged.\n");
1277             ao->b_stream_format_changed = 1;
1278             break;
1279         }
1280     }
1281     return noErr;
1282 }