kc3-lang/SDL/src/audio/coreaudio/SDL_coreaudio.h

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• Hash : 55b4f18e
  Author :
  Date : 2020-03-29T01:54:00
  

  coreaudio: The default SDL audio device now tracks the system output default.
  
  So if you go into System Preferences on a MacBook and toggle between a pair of
  connected bluetooth headphones and built-in internal speakers, SDL will
  switch the device it is playing sound through, to match this setting, on the
  fly.
  
  Likewise if the default output device is a USB thing and is unplugged; as the
  default device changes at the system level, SDL will pick this up and carry
  on with the new default. This is different from our unplug detection for
  specific devices, as in those cases we want to send the app a disconnect
  notification, instead of migrating transparently as we now do for default
  devices.
  
  Note that this should also work for capture devices; if the device changes,
  SDL will start recording from the new default.
  
  Fixes Bugzilla #4851.
  

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• src/audio/coreaudio/SDL_coreaudio.h

• /*
    Simple DirectMedia Layer
    Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org>
  
    This software is provided 'as-is', without any express or implied
    warranty.  In no event will the authors be held liable for any damages
    arising from the use of this software.
  
    Permission is granted to anyone to use this software for any purpose,
    including commercial applications, and to alter it and redistribute it
    freely, subject to the following restrictions:
  
    1. The origin of this software must not be misrepresented; you must not
       claim that you wrote the original software. If you use this software
       in a product, an acknowledgment in the product documentation would be
       appreciated but is not required.
    2. Altered source versions must be plainly marked as such, and must not be
       misrepresented as being the original software.
    3. This notice may not be removed or altered from any source distribution.
  */
  #include "../../SDL_internal.h"
  
  #ifndef SDL_coreaudio_h_
  #define SDL_coreaudio_h_
  
  #include "../SDL_sysaudio.h"
  
  #if !defined(__IPHONEOS__)
  #define MACOSX_COREAUDIO 1
  #endif
  
  #if MACOSX_COREAUDIO
  #include <CoreAudio/CoreAudio.h>
  #include <CoreServices/CoreServices.h>
  #else
  #import <AVFoundation/AVFoundation.h>
  #import <UIKit/UIApplication.h>
  #endif
  
  #include <AudioToolbox/AudioToolbox.h>
  #include <AudioUnit/AudioUnit.h>
  
  /* Hidden "this" pointer for the audio functions */
  #define _THIS   SDL_AudioDevice *this
  
  struct SDL_PrivateAudioData
  {
      SDL_Thread *thread;
      AudioQueueRef audioQueue;
      int numAudioBuffers;
      AudioQueueBufferRef *audioBuffer;
      void *buffer;
      UInt32 bufferOffset;
      UInt32 bufferSize;
      AudioStreamBasicDescription strdesc;
      SDL_sem *ready_semaphore;
      char *thread_error;
      SDL_atomic_t shutdown;
  #if MACOSX_COREAUDIO
      AudioDeviceID deviceID;
      SDL_atomic_t device_change_flag;
  #else
      SDL_bool interrupted;
      CFTypeRef interruption_listener;
  #endif
  };
  
  #endif /* SDL_coreaudio_h_ */
  
  /* vi: set ts=4 sw=4 expandtab: */
  

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