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Started upon a delegate protocol for the AudioQueue, resolving my use of a deprecated API while I'm at it.

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This commit is contained in:
Thomas Harte 2016-06-15 07:35:34 -04:00
parent dbdd05afb8
commit 695dd2e9e3
2 changed files with 16 additions and 5 deletions
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11
OSBindings/Mac/Clock Signal/Wrappers/AudioQueue.h
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@ -8,12 +8,19 @@
#import <Foundation/Foundation.h>
@class AudioQueue;
@protocol AudioQueueDelegate
- (void)audioQueueDidCompleteBuffer:(nonnull AudioQueue *)audioQueue;
@end
@interface AudioQueue : NSObject
- (instancetype)initWithSamplingRate:(Float64)samplingRate;
- (void)enqueueAudioBuffer:(const int16_t *)buffer numberOfSamples:(size_t)lengthInSamples;
- (nonnull instancetype)initWithSamplingRate:(Float64)samplingRate;
- (void)enqueueAudioBuffer:(nonnull const int16_t *)buffer numberOfSamples:(size_t)lengthInSamples;
@property (nonatomic, readonly) Float64 samplingRate;
@property (nonatomic, weak) id<AudioQueueDelegate> delegate;
+ (Float64)preferredSamplingRate;

10
OSBindings/Mac/Clock Signal/Wrappers/AudioQueue.m
View File

@ -36,6 +36,8 @@ enum {
- (void)audioQueue:(AudioQueueRef)theAudioQueue didCallbackWithBuffer:(AudioQueueBufferRef)buffer
{
[self.delegate audioQueueDidCompleteBuffer:self];
[_writeLock lock];
const unsigned int writeLead = _audioStreamWritePosition - _audioStreamReadPosition;
@ -95,7 +97,7 @@ static void audioOutputCallback(
_samplingRate = samplingRate;
/*
Describe a mono, 16bit, 44.1Khz audio format
Describe a mono 16bit stream of the requested sampling rate
*/
AudioStreamBasicDescription outputDescription;
@ -196,6 +198,8 @@ static void audioOutputCallback(
return ((_audioStreamWritePosition - _audioStreamReadPosition) < (AudioQueueStreamLength - AudioQueueBufferLength)) ? AudioQueueCanProceed : AudioQueueWait;
}
#pragma mark - Sampling Rate getters
+ (AudioDeviceID)defaultOutputDevice
{
AudioObjectPropertyAddress address;
@ -205,7 +209,7 @@ static void audioOutputCallback(
AudioDeviceID deviceID;
UInt32 size = sizeof(AudioDeviceID);
return AudioHardwareServiceGetPropertyData(kAudioObjectSystemObject, &address, 0, NULL, &size, &deviceID) ? 0 : deviceID;
return AudioObjectGetPropertyData(kAudioObjectSystemObject, &address, sizeof(AudioObjectPropertyAddress), NULL, &size, &deviceID) ? 0 : deviceID;
}
+ (Float64)preferredSamplingRate
@ -217,7 +221,7 @@ static void audioOutputCallback(
Float64 samplingRate;
UInt32 size = sizeof(Float64);
return AudioHardwareServiceGetPropertyData([self defaultOutputDevice], &address, 0, NULL, &size, &samplingRate) ? 0.0 : samplingRate;
return AudioObjectGetPropertyData([self defaultOutputDevice], &address, sizeof(AudioObjectPropertyAddress), NULL, &size, &samplingRate) ? 0.0 : samplingRate;
}
@end