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iOS: Initial work on automatic stream routing.

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Public issue #101
This commit is contained in:
David Reid
2019-12-22 16:06:07 +10:00
parent 11c0af38f5
commit a59682b97a
1 changed files with 114 additions and 0 deletions
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miniaudio.h
+114
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@@ -2604,6 +2604,7 @@ MA_ALIGNED_STRUCT(MA_SIMD_ALIGNMENT) ma_device
ma_bool32 isSwitchingPlaybackDevice; /* <-- Set to true when the default device has changed and miniaudio is in the process of switching. */
ma_bool32 isSwitchingCaptureDevice; /* <-- Set to true when the default device has changed and miniaudio is in the process of switching. */
ma_pcm_rb duplexRB;
void* pRouteChangeHandler; /* Only used on mobile platforms. Obj-C object for handling route changes. */
} coreaudio;
#endif
#ifdef MA_SUPPORT_SNDIO
@@ -19903,6 +19904,105 @@ static ma_result ma_device__untrack__coreaudio(ma_device* pDevice)
}
#endif
#if defined(MA_APPLE_MOBILE)
@interface ma_router_change_handler:NSObject {
ma_device* m_pDevice;
}
@end
@implementation ma_router_change_handler
-(id)init:(ma_device*)pDevice
{
self = [super init];
m_pDevice = pDevice;
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handle_route_change:) name:AVAudioSessionRouteChangeNotification object:[AVAudioSession sharedInstance]];
return self;
}
-(void)dealloc
{
[self remove_handler];
}
-(void)remove_handler
{
[[NSNotificationCenter defaultCenter] removeObserver:self name:@"AVAudioSessionRouteChangeNotification" object:nil];
}
-(void)handle_route_change:(NSNotification*)pNotification
{
AVAudioSession* pSession = [AVAudioSession sharedInstance];
NSInteger reason = [[[pNotification userInfo] objectForKey:AVAudioSessionRouteChangeReasonKey] integerValue];
switch (reason)
{
case AVAudioSessionRouteChangeReasonOldDeviceUnavailable:
{
#if defined(MA_DEBUG_OUTPUT)
printf("[Core Audio] Route Changed: AVAudioSessionRouteChangeReasonOldDeviceUnavailable\n");
#endif
} break;
case AVAudioSessionRouteChangeReasonNewDeviceAvailable:
{
#if defined(MA_DEBUG_OUTPUT)
printf("[Core Audio] Route Changed: AVAudioSessionRouteChangeReasonNewDeviceAvailable\n");
#endif
} break;
case AVAudioSessionRouteChangeReasonNoSuitableRouteForCategory:
{
#if defined(MA_DEBUG_OUTPUT)
printf("[Core Audio] Route Changed: AVAudioSessionRouteChangeReasonNoSuitableRouteForCategory\n");
#endif
} break;
case AVAudioSessionRouteChangeReasonWakeFromSleep:
{
#if defined(MA_DEBUG_OUTPUT)
printf("[Core Audio] Route Changed: AVAudioSessionRouteChangeReasonWakeFromSleep\n");
#endif
} break;
case AVAudioSessionRouteChangeReasonOverride:
{
#if defined(MA_DEBUG_OUTPUT)
printf("[Core Audio] Route Changed: AVAudioSessionRouteChangeReasonOverride\n");
#endif
} break;
case AVAudioSessionRouteChangeReasonCategoryChange:
{
#if defined(MA_DEBUG_OUTPUT)
printf("[Core Audio] Route Changed: AVAudioSessionRouteChangeReasonCategoryChange\n");
#endif
} break;
case AVAudioSessionRouteChangeReasonUnknown:
default:
{
#if defined(MA_DEBUG_OUTPUT)
printf("[Core Audio] Route Changed: AVAudioSessionRouteChangeReasonUnknown\n");
#endif
} break;
}
m_pDevice->sampleRate = (ma_uint32)pSession.sampleRate;
if (m_pDevice->type == ma_device_type_capture || m_pDevice->type == ma_device_type_duplex) {
m_pDevice->capture.channels = pSession.inputNumberOfChannels;
ma_device__post_init_setup(m_pDevice, ma_device_type_capture);
}
if (m_pDevice->type == ma_device_type_playback || m_pDevice->type == ma_device_type_duplex) {
m_pDevice->playback.channels = pSession.outputNumberOfChannels;
ma_device__post_init_setup(m_pDevice, ma_device_type_playback);
}
}
@end
#endif
void ma_device_uninit__coreaudio(ma_device* pDevice)
{
ma_assert(pDevice != NULL);
@@ -19915,6 +20015,12 @@ void ma_device_uninit__coreaudio(ma_device* pDevice)
*/
ma_device__untrack__coreaudio(pDevice);
#endif
#if defined(MA_APPLE_MOBILE)
if (pDevice->coreaudio.pRouteChangeHandler != NULL) {
ma_router_change_handler* pRouteChangeHandler = (__bridge ma_router_change_handler*)pDevice->coreaudio.pRouteChangeHandler;
[pRouteChangeHandler remove_handler];
}
#endif
if (pDevice->coreaudio.audioUnitCapture != NULL) {
((ma_AudioComponentInstanceDispose_proc)pDevice->pContext->coreaudio.AudioComponentInstanceDispose)((AudioUnit)pDevice->coreaudio.audioUnitCapture);
@@ -20563,6 +20669,14 @@ ma_result ma_device_init__coreaudio(ma_context* pContext, const ma_device_config
}
}
/*
We need to detect when a route has changed so we can update the data conversion pipeline accordingly. This is done
differently on non-Desktop Apple platforms.
*/
#if defined(MA_APPLE_MOBILE)
pDevice->coreaudio.pRouteChangeHandler = (__bridge void*)[[ma_router_change_handler alloc] init:pDevice];
#endif
return MA_SUCCESS;
}