joachim/openwebrx-clone
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we got fft

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This commit is contained in:
Jakob Ketterl
2019-05-04 20:26:11 +02:00
parent 89690d214d
commit 1f909080db
8 changed files with 254 additions and 47 deletions
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51
htdocs/openwebrx.js
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@ -1184,6 +1184,25 @@ function on_ws_recv(evt)
}
} else if (evt.data instanceof ArrayBuffer) {
// binary messages
type = new Uint8Array(evt.data, 0, 1)[0]
data = evt.data.slice(1)
switch (type) {
case 1:
if (fft_compression=="none") {
waterfall_add_queue(new Float32Array(data));
} else if (fft_compression == "adpcm") {
fft_codec.reset();
var waterfall_i16=fft_codec.decode(new Uint8Array(data));
var waterfall_f32=new Float32Array(waterfall_i16.length-COMPRESS_FFT_PAD_N);
for(var i=0;i<waterfall_i16.length;i++) waterfall_f32[i]=waterfall_i16[i+COMPRESS_FFT_PAD_N]/100;
waterfall_add_queue(waterfall_f32);
}
break;
default:
console.warn('unknown type of binary message: ' + type)
}
}
return
if(!(evt.data instanceof ArrayBuffer)) { divlog("on_ws_recv(): Not ArrayBuffer received...",1); return; }
@ -1656,8 +1675,8 @@ function audio_preinit()
audio_calculate_resampling(audio_context.sampleRate);
audio_resampler = new sdrjs.RationalResamplerFF(audio_client_resampling_factor,1);
ws.send("SET output_rate="+audio_server_output_rate.toString()+" action=start"); //now we'll get AUD packets as well
ws.send(JSON.stringify({"type":"start","params":{"output_rate":audio_server_output_rate}}))
}
function audio_init()
@ -1982,27 +2001,23 @@ function waterfall_add(data)
waterfall_image.data[base+x*4+i] = ((color>>>0)>>((3-i)*8))&0xff;
}*/
if(mathbox_mode==MATHBOX_MODES.WATERFALL)
{
if (mathbox_mode==MATHBOX_MODES.WATERFALL) {
//Handle mathbox
for(var i=0;i<fft_size;i++) mathbox_data[i+mathbox_data_index*fft_size]=data[i];
mathbox_shift();
}
else
{
//Add line to waterfall image
oneline_image = canvas_context.createImageData(w,1);
for(x=0;x<w;x++)
{
color=waterfall_mkcolor(data[x]);
for(i=0;i<4;i++)
oneline_image.data[x*4+i] = ((color>>>0)>>((3-i)*8))&0xff;
}
} else {
//Add line to waterfall image
oneline_image = canvas_context.createImageData(w,1);
for (x=0;x<w;x++) {
color=waterfall_mkcolor(data[x]);
for(i=0;i<4;i++)
oneline_image.data[x*4+i] = ((color>>>0)>>((3-i)*8))&0xff;
}
//Draw image
canvas_context.putImageData(oneline_image, 0, canvas_actual_line--);
shift_canvases();
if(canvas_actual_line<0) add_canvas();
//Draw image
canvas_context.putImageData(oneline_image, 0, canvas_actual_line--);
shift_canvases();
if(canvas_actual_line<0) add_canvas();
}