SndAudioUnitProcessor.h

//
//  $Id: SndAudioUnitProcessor.h 3634 2009-10-20 08:39:18Z leighsmith $
//
//  Original Author: Leigh Smith, <leigh@leighsmith.com>
//
//  Copyright (c) 2003, The MusicKit Project.  All rights reserved.
//
//  Permission is granted to use and modify this code for commercial and
//  non-commercial purposes so long as the author attribution and copyright
//  messages remain intact and accompany all relevant code.
//

#import <Foundation/Foundation.h>
#import <SndKit/SndKit.h>
// TODO while not within the SndKit framework.
// #import <SndKit/SndAudioProcessor.h>
#import <AudioUnit/AudioUnit.h>

@interface SndAudioUnitProcessor : SndAudioProcessor
{
    AudioUnit audioUnit;
    int inputBusNumber;
    unsigned int inputChannelCount;
    int outputBusNumber;
    int parameterListLength;
    AudioUnitParameterID *parameterIDList;
    BOOL auIsNonInterleaved;
    float *interleavedInputSamples;
}

+ (NSArray *) availableAudioProcessors;

+ (SndAudioProcessor *) audioProcessorNamed: (NSString *) processorName;

- (AudioUnit) audioUnit;

// TODO perhaps rename superclass and this to method initWithAudioUnitNamed: and remove paramCount parameter.

/*
 @brief Given a name previously returned by availableAudioUnits, a SndAudioUnitProcessor instance is created.
 @param audioUnitName The name of a unit as returned by <B>+availableAudioProcessors</B>.
 
   A SndAudioUnitProcessor instance is created for each AudioUnit. SndAudioUnitProcessor factory methods
             are the overseer of multiple available AudioUnits, each one is loaded and instantiated as a
             SndAudioUnitProcessor instance.
 */
- initWithParamCount: (const int) count name: (NSString *) audioUnitName;

- (BOOL) processReplacingInputBuffer: (SndAudioBuffer *) inB
                        outputBuffer: (SndAudioBuffer *) outB;


- (float) paramValue: (const int) index;

- (NSString *) paramName: (const int) index;

- (NSString*) paramLabel: (const int) index;

- (NSString *) paramDisplay: (const int) index;

- (void) setParam: (const int) index toValue: (const float) parameterValue;

@end

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