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Visualization: Tweak systems a bit

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This should improve performance slightly. It's
still recommended to switch off SceneKit to
save CPU usage, or switch of vis entirely.

Signed-off-by: Christopher Snowhill <kode54@gmail.com>
This commit is contained in:
Christopher Snowhill 2025-02-01 15:08:25 -08:00
parent 170fb06a62
commit 6c24ad8244
3 changed files with 107 additions and 63 deletions
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62
Audio/Visualization/VisualizationController.swift
View file

@ -12,7 +12,7 @@ class VisualizationController : NSObject {
var serialQueue = DispatchQueue(label: "Visualization Queue")
var sampleRate = 0.0
var latency = 0.0
var visAudio: [Float] = Array(repeating: 0.0, count: 44100 * 45)
var visAudio: [Float] = Array<Float>(repeating: 0.0, count: 44100 * 45)
var visAudioCursor = 0
var visAudioSize = 0
var visSamplesPosted: UInt64 = 0
@ -30,12 +30,10 @@ class VisualizationController : NSObject {
@objc
func reset() {
serialQueue.sync {
self.latency = 0;
let amount = self.visAudioSize
for i in 0..<amount {
self.visAudio[i] = 0
}
self.visSamplesPosted = 0;
self.latency = 0
self.visAudioSize = 44100 * 45
self.visAudio = Array<Float>(repeating: 0.0, count: visAudioSize)
self.visSamplesPosted = 0
}
}
@ -54,9 +52,9 @@ class VisualizationController : NSObject {
serialQueue.sync {
if(self.sampleRate != sampleRate) {
self.sampleRate = sampleRate
visAudioSize = (Int)(sampleRate * 45.0)
visAudio = Array(repeating: 0.0, count: visAudioSize)
visAudioCursor = 0
self.visAudioSize = (Int)(sampleRate * 45.0)
self.visAudio = Array<Float>(repeating: 0.0, count: visAudioSize)
self.visAudioCursor = 0
}
}
}
@ -64,17 +62,23 @@ class VisualizationController : NSObject {
@objc
func postVisPCM(_ inPCM: UnsafePointer<Float>?, amount: Int) {
serialQueue.sync {
let bufferPointer = UnsafeBufferPointer<Float>(start: inPCM, count: amount)
if(self.visAudioSize == 0) {
return
}
let bufferPointer = UnsafeRawPointer(inPCM)
if let bptr = bufferPointer {
let dataArray = bptr.assumingMemoryBound(to: Float.self)
var j = self.visAudioCursor
let k = self.visAudioSize
for i in 0..<amount {
let x = bufferPointer[i]
let x = dataArray[i]
self.visAudio[j] = x
j += 1; if j >= k { j = 0 }
}
self.visAudioCursor = j
self.latency += Double(amount) / self.sampleRate
self.visSamplesPosted += UInt64(amount);
self.visSamplesPosted += UInt64(amount)
}
}
}
@ -87,19 +91,10 @@ class VisualizationController : NSObject {
@objc
func copyVisPCM(_ outPCM: UnsafeMutablePointer<Float>?, visFFT: UnsafeMutablePointer<Float>?, latencyOffset: Double) {
outPCM?.update(repeating: 0.0, count: 4096)
visFFT?.update(repeating: 0.0, count: 2048)
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
}
@ -108,13 +103,16 @@ class VisualizationController : NSObject {
serialQueue.sync {
// Offset latency so the target sample is in the center of the window
let latencySamples = (Int)((self.latency + latencyOffset) * self.sampleRate) + 2048
var samplesToDo = 4096;
var samplesToDo = 4096
if(latencySamples < 0) {
return;
return
}
if(latencySamples + 4096 > visAudioSize) {
return
}
if(latencySamples < 4096) {
// Latency can sometimes dip below this threshold
samplesToDo = latencySamples;
samplesToDo = latencySamples
}
var j = self.visAudioCursor - latencySamples
let k = self.visAudioSize
@ -131,13 +129,7 @@ class VisualizationController : NSObject {
}
}
if(outPCM != nil) {
let pcmPointer = UnsafeMutableBufferPointer<Float>(start: outPCM, count: 4096)
for i in 0...4095 {
let x = outPCMCopy[i]
pcmPointer[i] = x
}
}
outPCM?.update(from: outPCMCopy, count: 4096)
if(visFFT != nil) {
serialQueue.sync {

30
Visualization/SpectrumViewCG.m
View file

@ -41,6 +41,8 @@ extern NSString *CogPlaybackDidStopNotificiation;
NSColor *borderColor;
ddb_analyzer_t _analyzer;
ddb_analyzer_draw_data_t _draw_data;
BOOL invalidateSpectrum;
float analyzerLastWidth;
float visAudio[4096], visFFT[2048];
@ -96,6 +98,12 @@ extern NSString *CogPlaybackDidStopNotificiation;
paused = NO;
isListening = NO;
visSamplesLastPosted = [self->visController samplesPosted];
invalidateSpectrum = YES;
analyzerLastWidth = -1.0f;
saLowerBound = LOWER_BOUND;
[self colorsDidChange:nil];
@ -122,6 +130,7 @@ extern NSString *CogPlaybackDidStopNotificiation;
- (void)enableFullView {
isFullView = YES;
_analyzer.freq_is_log = 1;
invalidateSpectrum = YES;
[self repaint];
}
@ -239,8 +248,10 @@ extern NSString *CogPlaybackDidStopNotificiation;
}
- (void)timerRun:(NSTimer *)timer {
invalidateSpectrum = YES;
[self repaint];
visLatencyOffset -= 1.0 / 60.0;
if(visSamplesLastPosted)
visLatencyOffset -= 1.0f / 60.0f;
}
- (void)colorsDidChange:(NSNotification *)notification {
@ -413,16 +424,28 @@ extern NSString *CogPlaybackDidStopNotificiation;
}
UInt64 samplesPosted = [self->visController samplesPosted];
if (samplesPosted != visSamplesLastPosted) {
if(!samplesPosted) return;
if(samplesPosted != visSamplesLastPosted) {
float latencyOffset = (float)(((double)((SInt64)samplesPosted - (SInt64)visSamplesLastPosted)) / [self->visController readSampleRate]);
if (latencyOffset < 0)
latencyOffset = -visLatencyOffset;
visSamplesLastPosted = samplesPosted;
visLatencyOffset = 0.0;
visLatencyOffset += latencyOffset;
}
BOOL invalidateWidth = isFullView && (fabs(analyzerLastWidth - self.bounds.size.width) > 1e-5);
if(invalidateWidth)
analyzerLastWidth = self.bounds.size.width;
if(invalidateWidth || invalidateSpectrum) {
[self->visController copyVisPCM:&visAudio[0] visFFT:&visFFT[0] latencyOffset:visLatencyOffset];
ddb_analyzer_process(&_analyzer, [self->visController readSampleRate] / 2.0, 1, visFFT, 2048);
ddb_analyzer_tick(&_analyzer);
ddb_analyzer_get_draw_data(&_analyzer, self.bounds.size.width, self.bounds.size.height, &_draw_data);
invalidateSpectrum = NO;
}
if(isFullView) {
[self drawSaGrid];
@ -438,6 +461,7 @@ extern NSString *CogPlaybackDidStopNotificiation;
_analyzer.mode = freqMode ? DDB_ANALYZER_MODE_FREQUENCIES : DDB_ANALYZER_MODE_OCTAVE_NOTE_BANDS;
_analyzer.mode_did_change = 1;
invalidateSpectrum = YES;
[self repaint];
}

46
Visualization/SpectrumViewSK.m
View file

@ -39,6 +39,7 @@ extern NSString *CogPlaybackDidStopNotificiation;
NSColor *backgroundColor;
ddb_analyzer_t _analyzer;
ddb_analyzer_draw_data_t _draw_data;
BOOL invalidateSpectrum;
SCNVector3 cameraPosition2d;
SCNVector3 cameraEulerAngles2d;
@ -84,7 +85,7 @@ extern NSString *CogPlaybackDidStopNotificiation;
NSDictionary *sceneOptions = @{
SCNPreferredRenderingAPIKey: @(SCNRenderingAPIMetal),
SCNPreferredDeviceKey: device,
SCNPreferLowPowerDeviceKey: @(NO)
SCNPreferLowPowerDeviceKey: @(YES)
};
self = [super initWithFrame:frame options:sceneOptions];
@ -191,6 +192,10 @@ extern NSString *CogPlaybackDidStopNotificiation;
isListening = NO;
cameraControlEnabled = NO;
invalidateSpectrum = YES;
visSamplesLastPosted = [self->visController samplesPosted];
[self setBackgroundColor:[NSColor clearColor]];
SCNScene *theScene = [SCNScene sceneNamed:@"Scenes.scnassets/Spectrum.scn"];
@ -311,21 +316,38 @@ extern NSString *CogPlaybackDidStopNotificiation;
[self updateVisListening];
if(stopped) {
if(invalidateSpectrum) {
[self drawBaseBands];
invalidateSpectrum = NO;
}
return;
}
UInt64 samplesPosted = [self->visController samplesPosted];
if (samplesPosted != visSamplesLastPosted) {
visSamplesLastPosted = samplesPosted;
visLatencyOffset = 0.0;
if(!samplesPosted) {
if(invalidateSpectrum) {
[self drawBaseBands];
invalidateSpectrum = NO;
}
return;
}
if(samplesPosted != visSamplesLastPosted) {
float latencyOffset = (float)(((double)((SInt64)samplesPosted - (SInt64)visSamplesLastPosted)) / [self->visController readSampleRate]);
if (latencyOffset < 0)
latencyOffset = -visLatencyOffset;
visSamplesLastPosted = samplesPosted;
visLatencyOffset += latencyOffset;
}
if(invalidateSpectrum) {
[self->visController copyVisPCM:&visAudio[0] visFFT:&visFFT[0] latencyOffset:visLatencyOffset];
ddb_analyzer_process(&_analyzer, [self->visController readSampleRate] / 2.0, 1, visFFT, 2048);
ddb_analyzer_tick(&_analyzer);
ddb_analyzer_get_draw_data(&_analyzer, 11.0, 1.0, &_draw_data);
invalidateSpectrum = NO;
}
[self drawAnalyzer];
}
@ -346,8 +368,10 @@ extern NSString *CogPlaybackDidStopNotificiation;
}
- (void)timerRun:(NSTimer *)timer {
invalidateSpectrum = YES;
[self repaint];
visLatencyOffset -= 1.0 / 60.0;
if(visSamplesLastPosted)
visLatencyOffset -= 1.0f / 60.0f;
}
- (void)startPlayback {
@ -376,6 +400,7 @@ extern NSString *CogPlaybackDidStopNotificiation;
stopped = YES;
paused = NO;
bandsReset = NO;
invalidateSpectrum = YES;
[self updateVisListening];
[self repaint];
}
@ -420,11 +445,13 @@ extern NSString *CogPlaybackDidStopNotificiation;
const int barBase = i * barStep;
const int barIndex = barBase + j;
if(barIndex < _draw_data.bar_count) {
if(bar[barIndex].bar_height > maxValue) {
maxValue = bar[barIndex].bar_height;
const float bar_height = bar[barIndex].bar_height;
const float peak_ypos = bar[barIndex].peak_ypos;
if(bar_height > maxValue) {
maxValue = bar_height;
}
if(bar[barIndex].peak_ypos > maxMax) {
maxMax = bar[barIndex].peak_ypos;
if(peak_ypos > maxMax) {
maxMax = peak_ypos;
}
}
}
@ -455,6 +482,7 @@ extern NSString *CogPlaybackDidStopNotificiation;
_analyzer.mode = freqMode ? DDB_ANALYZER_MODE_FREQUENCIES : DDB_ANALYZER_MODE_OCTAVE_NOTE_BANDS;
_analyzer.mode_did_change = 1;
invalidateSpectrum = YES;
[self repaint];
}