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[Cog Audio] Make the Swift Vis Controller work 

And this is the actual meat of getting it to work properly, the changes
the Swift code needed to actually be fully functional.

Signed-off-by: Christopher Snowhill <kode54@gmail.com>
main
Christopher Snowhill 2022-08-05 21:38:13 -07:00
parent e630b34981
commit be87e5433c
1 changed files with 52 additions and 35 deletions
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87
Audio/Visualization/VisualizationController.swift
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@ -8,27 +8,30 @@
import Foundation
@objc(VisualizationController)
class VisualizationController {
class VisualizationController : NSObject {
var serialQueue = DispatchQueue(label: "Visualization Queue")
var sampleRate = 44100.0
var sampleRate = 0.0
var latency = 0.0
var visAudio: [Float] = Array(repeating: 0.0, count: 44100 * 45)
var visAudioCursor = 0
var visAudioSize = 0
private static var sharedController: VisualizationController = {
private static var sharedVisualizationController: VisualizationController = {
let visualizationController = VisualizationController()
return visualizationController
}()
class func sharedVisualizationController() -> VisualizationController {
return sharedController
@objc
class func sharedController() -> VisualizationController {
return sharedVisualizationController
}
@objc
func postLatency(_ latency: Double) {
self.latency = latency
}
@objc
func postSampleRate(_ sampleRate: Double) {
serialQueue.sync {
if(self.sampleRate != sampleRate) {
@ -40,57 +43,71 @@ class VisualizationController {
}
}
@objc
func postVisPCM(_ inPCM: UnsafePointer<Float>?, amount: Int) {
serialQueue.sync {
let bufferPointer = UnsafeBufferPointer(start: inPCM, count: amount)
if let bptr = bufferPointer {
let dataArray = bptr.assumingMemoryBound(to: Float.self)
var j = self.visAudioCursor
var k = self.visAudioSize
for i in 0..<amount {
let x = Float(dataArray[i])
self.visAudio[j] = x
j++; if j >= k { j = 0 }
}
self.visAudioCursor = j
let bufferPointer = UnsafeBufferPointer<Float>(start: inPCM, count: amount)
var j = self.visAudioCursor
let k = self.visAudioSize
for i in 0..<amount {
let x = bufferPointer[i]
self.visAudio[j] = x
j += 1; if j >= k { j = 0 }
}
self.visAudioCursor = j
}
}
@objc
func readSampleRate() -> Double {
serialQueue.sync {
return self.sampleRate
}
}
func copyVisPCM(_ outPCM: UnsafeMutablePointer<Float>?, visFFT: UnsafeMutablePointer<Float>?, latencyoffset: Double) {
let outPCMCopy = Array<Float>(repeating: 0.0, count: 4096)
@objc
func copyVisPCM(_ outPCM: UnsafeMutablePointer<Float>?, visFFT: UnsafeMutablePointer<Float>?, latencyOffset: Double) {
if(self.visAudioSize == 0) {
if(outPCM != nil) {
let pcmPointer = UnsafeMutableBufferPointer<Float>(start: outPCM, count: 4096)
for i in 0...4095 {
pcmPointer[i] = 0.0
}
}
if(visFFT != nil) {
let fftPointer = UnsafeMutableBufferPointer<Float>(start: visFFT, count: 2048)
for i in 0...2047 {
fftPointer[i] = 0.0
}
}
return
}
var outPCMCopy = Array<Float>(repeating: 0.0, count: 4096)
serialQueue.sync {
var latencySamples = (Int)(self.latency * self.sampleRate)
let latencySamples = (Int)(self.latency * self.sampleRate)
var j = self.visAudioCursor - latencySamples
var k = self.visAudioSize
let k = self.visAudioSize
if j < 0 { j += k }
for i in 0..4095 {
for i in 0...4095 {
let x = self.visAudio[j]
outPCMCopy[i] = x
j++; if j >= k { j = 0 }
j += 1; if j >= k { j = 0 }
}
}
let pcmPointer = UnsafeMutableBufferPointer(start: outPCM, count: 4096)
if let bptr = pcmPointer {
let dataArray = bptr.assumingMemoryBound(to: Float.self)
for i in 0..4095 {
if(outPCM != nil) {
let pcmPointer = UnsafeMutableBufferPointer<Float>(start: outPCM, count: 4096)
for i in 0...4095 {
let x = outPCMCopy[i]
dataArray[i] = x
pcmPointer[i] = x
}
}
let fftPointer = UnsafeMutablePointer(start: visFFT, count: 2048)
if let bptr = fftPointer {
if(visFFT != nil) {
serialQueue.sync {
fft_calculate(outPCMCopy, bptr, 2048)
fft_calculate(outPCMCopy, visFFT, 2048)
}
}
}