Hello all,
So I have been continuing on my quest to use C primatives in my DSP
project, and have been stumped with what to me feels like total
nonsense.
I am hoping someone can shed some light on the subject. So basically I
have this (relevant code):
--- Processor.m
Reflector *reflector = [Reflector translateCoefficients:coefficients
numberOfSamples:buffer.size];
FrameData *frameData = [[FrameData alloc] initWithReflector:reflector
pitch:0 repeat:NO translate:YES];
--- Reflector.m
@interface Reflector ()
@property (nonatomic) double *ks;
@end
+(void)translatCoefficients... {
... stuff that calculates k[1] through k[10] and rms
double k[11] = {0};
NSLog(@"%f", k[1]); // this outputs ==> -0.941884
return [[Reflector alloc] initWithKs:k rms:rms];
}
-(instancetype)initWithKs:(double *)ks rms:(NSUInteger)rms {
if (self = [super init]) {
self.ks = ks;
self.rms = rms;
NSLog(@"%f", self.ks[1]); // this outputs ==> 0.941884
}
return self;
}
--- FrameData.m
-(NSNumber *)parameterizedValueForK:(NSUInteger)k {
NSUInteger index = [ClosestValueFinder indexFor:self.reflector.ks[k]
floats:[CodingTable kBinFor:k]
size:[CodingTable kSizeFor:k]];
NSLog(@"%f", self.reflector.ks[1]); // this outputs ==> 0.000000
?!?!?!?!?!?!
}
Why in the world am I losing the ks property? Reflector is the correct object
in the context of the FrameData instance.. So, it's like somehow reflector.ks
property
is getting garbage collected and I do not understand how or why!
Anyway, I changed the Reflector.m code to do:
-(instancetype)initWithKs:(double *)ks rms:(NSUInteger)rms {
if (self = [super init]) {
double *k = malloc(sizeof(double) * 11);
for (int i = 0; i <= 10; i++) {
k[i] = ks[i];
}
self.ks = k;
self.rms = rms;
}
return self;
}
-(void)dealloc {
free(self.ks);
}
Is that really what I have to do?
Patrick J. Collins
http://collinatorstudios.com
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