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Working with arbitrary goertzel's

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cnlohr
2024-07-13 01:19:46 -07:00
parent 7f3ebcc732
commit 64c8253055
4 changed files with 239 additions and 150 deletions
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ch32v/lib/webhidcontrol.js
+49 -52
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@@ -5,6 +5,7 @@ let loopAbort = false;
const IQHistoryLen = 4096;
var IQHistoryArray = new Uint32Array(IQHistoryLen);
var MPHistoryArray = new Float32Array(IQHistoryLen*2);
var IQHistoryHead = 0|0;
var lastIntensity = 1.0;
var lastNumQ = 0;
@@ -66,7 +67,7 @@ var targetGain = 0.0;
function UpdateButtonNames()
{
document.getElementById( "ToggleAudioButton" ).value = ( targetGain > 0.5 ) ? "Stop Audio" : "Start Audio";
document.getElementById( "ToggleAudioButton" ).value = ( targetGain > 0.0 ) ? "Stop Audio" : "Start Audio";
document.getElementById( "ToggleAudioModulationButton" ).value = ( targetModulation > 0.5 ) ? "FM" : "AM";
}
@@ -75,8 +76,6 @@ async function toggleAudioModulation()
if( playingAudioProcessor != null )
{
var newVal = 1 - targetModulation;
let demodmodeParam = playingAudioProcessor.parameters.get("demodmode");
demodmodeParam.setValueAtTime( newVal, audioContext.currentTime);
targetModulation = newVal;
}
UpdateButtonNames();
@@ -91,8 +90,6 @@ async function toggleAudio()
static get parameterDescriptors() {\
return [\
{ name: "gain", defaultValue: 0, },\
{ name: "demodmode", defaultValue: 0, },\
{ name: "lastIntensity", defaultValue: 1, },\
{ name: "sampleAdvance", defaultValue: 0.5, },\
]\
};\
@@ -102,15 +99,10 @@ async function toggleAudio()
this.rbufferhead = 0|0; \
this.rbuffertail = 0|0; \
this.sampleplace = 0.0; \
this.lastIntensity = 0.0; \
this.dcoffset = 0.0; \
this.totalsampcount = 0|0; \
this.lastDemodMode = 0|0; \
this.iirphase = 0.0; /* for FM */\
this.lastphase = 0.0; /* for FM */\
this.phaseout = 0.0; /* for FM */\
\
this.port.onmessage = (e) => { \
var mulcoeff = 100.0 / Math.fround( this.lastIntensity ); \
var demodmode = this.lastDemodMode | 0; \
for( var i = 0|0; i < e.data.length|0; i++ ) \
{ \
let n = (this.rbufferhead + (1|0))%(8192|0); \
@@ -119,41 +111,17 @@ async function toggleAudio()
this.rbuffertail = (this.rbuffertail + (1|0))%(8192|0); \
console.log( `Overflow` ); \
} \
let vv = e.data[i] | 0; \
let vi = vv >> 16; \
let vq = vv & 0xffff; \
if( vi >= 32768 ) vi = vi-65535; \
if( vq >= 32768 ) vq = vq-65535; \
let power = Math.sqrt( vi * vi + vq * vq ) * mulcoeff; \
let phase = Math.atan2( vi, vq ) * 0.159155078 + 0.5; \
if( this.lastDemodMode == 0 ) \
{ /* AM */ \
this.rbuffer[this.rbufferhead] = power; \
} \
else if( this.lastDemodMode == 1 ) \
{ /* FM */ \
var diffphase = phase - this.lastphase; \
this.lastphase = phase; \
if( diffphase < 0.0 ) diffphase += 1.0; \
if( diffphase > 1.0 ) diffphase -= 1.0; \
this.iirphase = this.iirphase * 0.999 + diffphase * 0.001; \
diffphase -= this.iirphase; \
var po = this.phaseout = this.phaseout * 0.993 + diffphase; \
if( po < 0.0 ) po += 1.0; \
if( po > 1.0 ) po -= 1.0; \
this.rbuffer[this.rbufferhead] = po; \
} \
var vv = e.data[i]; \
this.dcoffset = this.dcoffset * 0.995 + vv * 0.005; \
this.rbuffer[this.rbufferhead] = vv - this.dcoffset; \
this.rbufferhead = n; \
} \
console.log( this.iirphase ); \
}; \
}\
\
process(inputs, outputs, parameters) {\
/*console.log( parameters.gain[0] );*/ \
/*console.log( this.ingestData );*/ \
this.lastIntensity = parameters.lastIntensity[0]; \
this.lastDemodMode = parameters.demodmode[0]; \
let len = outputs[0][0].length; \
const sa = Math.fround( parameters.sampleAdvance[0] ); /*float*/ \
var s = Math.fround( this.sampleplace ); /*float*/ \
@@ -176,7 +144,7 @@ async function toggleAudio()
nsamp = Math.fround( this.rbuffer[tailnext] ); \
} \
var valv = tsamp * (1.0-s) + nsamp * s; \
outputs[0][0][b] = 0.1*valv*parameters.gain[0]; \
outputs[0][0][b] = valv*parameters.gain[0]; \
} \
/*console.log( tail + " " + this.rbuffertail + " " + tsamp + " " + nsamp );*/ \
this.rbuffertail = tail; \
@@ -218,7 +186,7 @@ async function toggleAudio()
gainParam.setValueAtTime( 0, audioContext.currentTime );
}
var newVal = 1 - targetGain;
var newVal = 0.1 - targetGain;
console.log( "Setting gain to: " + newVal );
let gainParam = playingAudioProcessor.parameters.get("gain");
gainParam.setValueAtTime( newVal, audioContext.currentTime);
@@ -323,6 +291,10 @@ function updateWebHidDeviceWithParameters( paramlist )
if( !sendReport ) sendLoopError( "error creating sendFeatureReport" );
}
FMiirphase = 0.0; /* for FM */
FMlastphase = 0.0; /* for FM */
FMphaseout = 0.0; /* for FM */
async function sendLoop()
{
@@ -388,19 +360,20 @@ async function sendLoop()
var x = 253;
for( var i = (IQHistoryHead-1) & (IQHistoryLen-1); i != IQHistoryHead|0; i = (i - 1 + IQHistoryLen) & (IQHistoryLen-1) )
{
let power = MPHistoryArray[i*2+0]; //Math.sqrt( real * real + imag * imag ) * mulcoeff;
let phase = MPHistoryArray[i*2+1]; //Math.atan2( real, imag ) * 0.159155078*0.5;
ctx.fillRect(x,power*120+10,2,2);
ctx.fillRect(x,phase*80+110,2,2);
let v = IQHistoryArray[i];
let real = (v >> 16);
let imag = (v & 0xffff);
if( real > 32767 ) real -= 65536;
if( imag > 32767 ) imag -= 65536;
let power = Math.sqrt( real * real + imag * imag ) * mulcoeff;
let phase = Math.atan2( real, imag ) * 0.159155078*0.5;
real = real * mulcoeff + 100;
imag = imag * mulcoeff + 100;
if( real < 0 ) real = 0; if( real > 255 ) real = 255;
if( imag < 0 ) imag = 0; if( imag > 255 ) imag = 255;
ctx.fillRect(x,power+10,2,2);
ctx.fillRect(x,phase*140+150,2,2);
x++;
if( lot > 0 )
{
@@ -436,10 +409,38 @@ async function sendLoop()
let time_total = data[1]>>16;
let time_used = data[1]&0xffff;
let sample_divisor = data[2]&0xffff;
let demodbuffer = new Float32Array(numq);
let mulcoeff = 100.0 / lastIntensity;
for( var i = 0|0; i < numq; i++ )
{
IQHistoryArray[IQHistoryHead++] = data[i+3];
if( IQHistoryHead == IQHistoryLen ) IQHistoryHead = 0;
let vv = IQHistoryArray[IQHistoryHead] = data[i+3];
let vi = vv >> 16;
let vq = vv & 0xffff;
if( vi >= 32768 ) vi = vi-65535;
if( vq >= 32768 ) vq = vq-65535;
let power = Math.sqrt( vi * vi + vq * vq ) * mulcoeff;
let phase = Math.atan2( vi, vq ) * 0.159155078 + 0.5;
MPHistoryArray[IQHistoryHead*2+0] = power; //Math.sqrt( real * real + imag * imag ) * mulcoeff;
MPHistoryArray[IQHistoryHead*2+1] = phase; //Math.atan2( real, imag ) * 0.159155078*0.5;
if( targetModulation == 0 )
{ /* AM */
demodbuffer[i] = power;
}
else if( targetModulation == 1 )
{ /* FM */
var diffphase = phase - FMlastphase;
this.lastphase = phase;
if( diffphase < 0.0 ) diffphase += 1.0;
if( diffphase > 1.0 ) diffphase -= 1.0;
FMiirphase = FMiirphase * 0.999 + diffphase * 0.001;
diffphase -= FMiirphase;
var po = FMphaseout = FMphaseout * 0.993 + diffphase;
if( po < 0.0 ) po += 1.0;
if( po > 1.0 ) po -= 1.0;
demodbuffer[i] = po;
}
IQHistoryHead = (IQHistoryHead+1)%IQHistoryLen;
}
lastIntensity = intensity;
lastNumQ = numq;
@@ -448,15 +449,11 @@ async function sendLoop()
if( audioContext != null && playingAudioProcessor != null )
{
let lastIntensityParam = playingAudioProcessor.parameters.get("lastIntensity");
lastIntensityParam.setValueAtTime( lastIntensity, audioContext.currentTime);
// TODO: Use crystalmhz
let sampleAdvance = (144000000.0/sample_divisor) / audioContext.sampleRate;
let sampleAdvanceParam = playingAudioProcessor.parameters.get("sampleAdvance");
sampleAdvanceParam.setValueAtTime( sampleAdvance, audioContext.currentTime);
playingAudioProcessor.port.postMessage( new Uint32Array( data.buffer.slice( 3*4, numq*4 + 3*4 ) ) );
playingAudioProcessor.port.postMessage( demodbuffer );
}
goodCount++;
}