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