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55b4f18e1a
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.
71 lines
2 KiB
Objective-C
71 lines
2 KiB
Objective-C
/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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#include "../../SDL_internal.h"
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#ifndef SDL_coreaudio_h_
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#define SDL_coreaudio_h_
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#include "../SDL_sysaudio.h"
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#if !defined(__IPHONEOS__)
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#define MACOSX_COREAUDIO 1
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#endif
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#if MACOSX_COREAUDIO
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#include <CoreAudio/CoreAudio.h>
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#include <CoreServices/CoreServices.h>
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#else
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#import <AVFoundation/AVFoundation.h>
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#import <UIKit/UIApplication.h>
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#endif
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#include <AudioToolbox/AudioToolbox.h>
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#include <AudioUnit/AudioUnit.h>
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/* Hidden "this" pointer for the audio functions */
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#define _THIS SDL_AudioDevice *this
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struct SDL_PrivateAudioData
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{
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SDL_Thread *thread;
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AudioQueueRef audioQueue;
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int numAudioBuffers;
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AudioQueueBufferRef *audioBuffer;
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void *buffer;
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UInt32 bufferOffset;
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UInt32 bufferSize;
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AudioStreamBasicDescription strdesc;
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SDL_sem *ready_semaphore;
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char *thread_error;
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SDL_atomic_t shutdown;
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#if MACOSX_COREAUDIO
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AudioDeviceID deviceID;
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SDL_atomic_t device_change_flag;
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#else
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SDL_bool interrupted;
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CFTypeRef interruption_listener;
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#endif
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};
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#endif /* SDL_coreaudio_h_ */
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/* vi: set ts=4 sw=4 expandtab: */
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