024e36963a
This experiment with Constant Q Transform was interesting, and it's nice to see that it actually functions, but it's just too damn slow to really be useful for visualization purposes. It uses nearly a full core on an M1 processor, and I'd hate to see what it does on an Intel machine. Stashing this in a branch and discarding it from the main tree, in case somebody finds this code useful some day. Signed-off-by: Christopher Snowhill <kode54@gmail.com>
69 lines
1.3 KiB
Objective-C
69 lines
1.3 KiB
Objective-C
//
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// VisualizationController.m
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// CogAudio Framework
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//
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// Created by Christopher Snowhill on 2/12/22.
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//
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#import "VisualizationController.h"
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#import <Accelerate/Accelerate.h>
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#import "cqt.h"
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@implementation VisualizationController
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static VisualizationController *_sharedController = nil;
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+ (VisualizationController *)sharedController {
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@synchronized(self) {
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if(!_sharedController) {
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_sharedController = [[VisualizationController alloc] init];
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}
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}
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return _sharedController;
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}
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- (id)init {
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self = [super init];
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if(self) {
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vDSP_vclr(visAudio, 1, 4096);
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}
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return self;
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}
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- (void)dealloc {
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cqt_free();
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}
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- (void)postSampleRate:(double)sampleRate {
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@synchronized(self) {
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self->sampleRate = sampleRate;
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}
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}
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- (void)postVisPCM:(const float *)inPCM amount:(int)amount {
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int skipAmount = 0;
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if(amount > 4096) {
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skipAmount = amount - 4096;
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amount = 4096;
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}
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@synchronized(self) {
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cblas_scopy(4096 - amount, visAudio + amount, 1, visAudio, 1);
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cblas_scopy(amount, inPCM + skipAmount, 1, visAudio + 4096 - amount, 1);
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}
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}
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- (double)readSampleRate {
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@synchronized(self) {
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return sampleRate;
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}
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}
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- (void)copyVisPCM:(float *)outPCM visCQT:(float *)outCQT {
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@synchronized(self) {
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cblas_scopy(4096, visAudio, 1, outPCM, 1);
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cqt_calculate(visAudio, sampleRate, outCQT, 4096);
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}
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}
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@end
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