openwebrx-clone/htdocs/openwebrx.js

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2014-11-29 00:07:10 +00:00
/*
This file is part of OpenWebRX,
an open-source SDR receiver software with a web UI.
Copyright (c) 2013-2015 by Andras Retzler <randras@sdr.hu>
2014-11-29 00:07:10 +00:00
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
2014-11-29 00:07:10 +00:00
"""
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*/
is_firefox=navigator.userAgent.indexOf("Firefox")!=-1;
function arrayBufferToString(buf) {
//http://stackoverflow.com/questions/6965107/converting-between-strings-and-arraybuffers
return String.fromCharCode.apply(null, new Uint8Array(buf));
}
function getFirstChars(buf, num)
{
var u8buf=new Uint8Array(buf);
var output=String();
num=Math.min(num,u8buf.length);
for(i=0;i<num;i++) output+=String.fromCharCode(u8buf[i]);
return output;
}
var bandwidth;
var center_freq;
var audio_buffer_current_size_debug=0;
var audio_buffer_all_size_debug=0;
var audio_buffer_current_count_debug=0;
var audio_buffer_current_size=0;
var fft_size;
var fft_fps;
var fft_compression="none";
var fft_codec=new sdrjs.ImaAdpcm();
var audio_compression="none";
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var waterfall_setup_done=0;
var waterfall_queue = [];
var waterfall_timer;
/*function fade(something,from,to,time_ms,fps)
{
something.style.opacity=from;
something.fade_i=0;
n_of_iters=time_ms/(1000/fps);
change=(to-from)/(n_of_iters-1);
something.fade_timer=window.setInterval(
function(){
if(something.fade_i++<n_of_iters)
something.style.opacity=parseFloat(something.style.opacity)+change;
else
{something.style.opacity=to; window.clearInterval(something.fade_timer); }
},1000/fps);
}*/
var rx_photo_state=1;
function e(what) { return document.getElementById(what); }
function init_rx_photo()
{
e("webrx-top-photo-clip").style.maxHeight=rx_photo_height.toString()+"px";
window.setTimeout(function() { animate(e("webrx-rx-photo-title"),"opacity","",1,0,1,500,30); },1000);
window.setTimeout(function() { animate(e("webrx-rx-photo-desc"),"opacity","",1,0,1,500,30); },1500);
window.setTimeout(function() { close_rx_photo() },2500);
}
dont_toggle_rx_photo_flag=0;
function dont_toggle_rx_photo()
{
dont_toggle_rx_photo_flag=1;
}
function toggle_rx_photo()
{
if(dont_toggle_rx_photo_flag) { dont_toggle_rx_photo_flag=0; return; }
if(rx_photo_state) close_rx_photo();
else open_rx_photo()
}
function close_rx_photo()
{
rx_photo_state=0;
animate_to(e("webrx-top-photo-clip"),"maxHeight","px",67,0.93,1000,60,function(){resize_waterfall_container(true);});
e("openwebrx-rx-details-arrow-down").style.display="block";
e("openwebrx-rx-details-arrow-up").style.display="none";
}
function open_rx_photo()
{
rx_photo_state=1;
e("webrx-rx-photo-desc").style.opacity=1;
e("webrx-rx-photo-title").style.opacity=1;
animate_to(e("webrx-top-photo-clip"),"maxHeight","px",rx_photo_height,0.93,1000,60,function(){resize_waterfall_container(true);});
e("openwebrx-rx-details-arrow-down").style.display="none";
e("openwebrx-rx-details-arrow-up").style.display="block";
}
function style_value(of_what,which)
{
if(of_what.currentStyle) return of_what.currentStyle[which];
else if (window.getComputedStyle) return document.defaultView.getComputedStyle(of_what,null).getPropertyValue(which);
}
// ========================================================
// ================= ANIMATION ROUTINES =================
// ========================================================
function animate(object,style_name,unit,from,to,accel,time_ms,fps,to_exec)
{
//console.log(object.className);
if(typeof to_exec=="undefined") to_exec=0;
object.style[style_name]=from.toString()+unit;
object.anim_i=0;
n_of_iters=time_ms/(1000/fps);
change=(to-from)/(n_of_iters);
if(typeof object.anim_timer!="undefined") { window.clearInterval(object.anim_timer); }
object.anim_timer=window.setInterval(
function(){
if(object.anim_i++<n_of_iters)
{
if(accel==1) object.style[style_name]=(parseFloat(object.style[style_name])+change).toString()+unit;
else
{
remain=parseFloat(object.style[style_name])-to;
if(Math.abs(remain)>9||unit!="px") new_val=(to+accel*remain);
else {if(Math.abs(remain)<2) new_val=to;
else new_val=to+remain-(remain/Math.abs(remain));}
object.style[style_name]=new_val.toString()+unit;
}
}
else
{object.style[style_name]=to.toString()+unit; window.clearInterval(object.anim_timer); delete object.anim_timer; }
if(to_exec!=0) to_exec();
},1000/fps);
}
function animate_to(object,style_name,unit,to,accel,time_ms,fps,to_exec)
{
from=parseFloat(style_value(object,style_name));
animate(object,style_name,unit,from,to,accel,time_ms,fps,to_exec);
}
// ========================================================
// ================ DEMODULATOR ROUTINES ================
// ========================================================
demodulators=[]
demodulator_color_index=0;
demodulator_colors=["#ffff00", "#00ff00", "#00ffff", "#058cff", "#ff9600", "#a1ff39", "#ff4e39", "#ff5dbd"]
function demodulators_get_next_color()
{
if(demodulator_color_index>=demodulator_colors.length) demodulator_color_index=0;
return(demodulator_colors[demodulator_color_index++]);
}
function demod_envelope_draw(range, from, to, color, line)
{ // ____
// Draws a standard filter envelope like this: _/ \_
// Parameters are given in offset frequency (Hz).
// Envelope is drawn on the scale canvas.
// A "drag range" object is returned, containing information about the draggable areas of the envelope
// (beginning, ending and the line showing the offset frequency).
if(typeof color == "undefined") color="#ffff00"; //yellow
env_bounding_line_w=5; //
env_att_w=5; // _______ ___env_h2 in px ___|_____
env_h1=17; // _/| \_ ___env_h1 in px _/ |_ \_
env_h2=5; // |||env_att_line_w |_env_lineplus
env_lineplus=1; // ||env_bounding_line_w
env_line_click_area=6;
//range=get_visible_freq_range();
from_px=scale_px_from_freq(from,range);
to_px=scale_px_from_freq(to,range);
if(to_px<from_px) /* swap'em */ { temp_px=to_px; to_px=from_px; from_px=temp_px; }
/*from_px-=env_bounding_line_w/2;
to_px+=env_bounding_line_w/2;*/
from_px-=(env_att_w+env_bounding_line_w);
to_px+=(env_att_w+env_bounding_line_w);
// do drawing:
scale_ctx.lineWidth=3;
scale_ctx.strokeStyle=color;
scale_ctx.fillStyle = color;
var drag_ranges={ envelope_on_screen: false, line_on_screen: false };
if(!(to_px<0||from_px>window.innerWidth)) // out of screen?
{
drag_ranges.beginning={x1:from_px, x2: from_px+env_bounding_line_w+env_att_w};
drag_ranges.ending={x1:to_px-env_bounding_line_w-env_att_w, x2: to_px};
drag_ranges.whole_envelope={x1:from_px, x2: to_px};
drag_ranges.envelope_on_screen=true;
scale_ctx.beginPath();
scale_ctx.moveTo(from_px,env_h1);
scale_ctx.lineTo(from_px+env_bounding_line_w, env_h1);
scale_ctx.lineTo(from_px+env_bounding_line_w+env_att_w, env_h2);
scale_ctx.lineTo(to_px-env_bounding_line_w-env_att_w, env_h2);
scale_ctx.lineTo(to_px-env_bounding_line_w, env_h1);
scale_ctx.lineTo(to_px, env_h1);
scale_ctx.globalAlpha = 0.3;
scale_ctx.fill();
scale_ctx.globalAlpha = 1;
scale_ctx.stroke();
}
if(typeof line != "undefined") // out of screen?
{
line_px=scale_px_from_freq(line,range);
if(!(line_px<0||line_px>window.innerWidth))
{
drag_ranges.line={x1:line_px-env_line_click_area/2, x2: line_px+env_line_click_area/2};
drag_ranges.line_on_screen=true;
scale_ctx.moveTo(line_px,env_h1+env_lineplus);
scale_ctx.lineTo(line_px,env_h2-env_lineplus);
scale_ctx.stroke();
}
}
return drag_ranges;
}
function demod_envelope_where_clicked(x, drag_ranges, key_modifiers)
{ // Check exactly what the user has clicked based on ranges returned by demod_envelope_draw().
in_range=function(x,range) { return range.x1<=x&&range.x2>=x; }
dr=demodulator.draggable_ranges;
if(key_modifiers.shiftKey)
{
//Check first: shift + center drag emulates BFO knob
if(drag_ranges.line_on_screen&&in_range(x,drag_ranges.line)) return dr.bfo;
//Check second: shift + envelope drag emulates PBF knob
if(drag_ranges.envelope_on_screen&&in_range(x,drag_ranges.whole_envelope)) return dr.pbs;
}
if(drag_ranges.envelope_on_screen)
{
// For low and high cut:
if(in_range(x,drag_ranges.beginning)) return dr.beginning;
if(in_range(x,drag_ranges.ending)) return dr.ending;
// Last priority: having clicked anything else on the envelope, without holding the shift key
if(in_range(x,drag_ranges.whole_envelope)) return dr.anything_else;
}
return dr.none; //User doesn't drag the envelope for this demodulator
}
//******* class demodulator *******
// this can be used as a base class for ANY demodulator
demodulator=function(offset_frequency)
{
//console.log("this too");
this.offset_frequency=offset_frequency;
this.has_audio_output=true;
this.has_text_output=false;
this.envelope={};
this.color=demodulators_get_next_color();
this.stop=function(){};
}
//ranges on filter envelope that can be dragged:
demodulator.draggable_ranges={none: 0, beginning:1 /*from*/, ending: 2 /*to*/, anything_else: 3, bfo: 4 /*line (while holding shift)*/, pbs: 5 } //to which parameter these correspond in demod_envelope_draw()
//******* class demodulator_default_analog *******
// This can be used as a base for basic audio demodulators.
// It already supports most basic modulations used for ham radio and commercial services: AM/FM/LSB/USB
demodulator_response_time=50;
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//in ms; if we don't limit the number of SETs sent to the server, audio will underrun (possibly output buffer is cleared on SETs in GNU Radio
function demodulator_default_analog(offset_frequency,subtype)
{
//console.log("hopefully this happens");
//http://stackoverflow.com/questions/4152931/javascript-inheritance-call-super-constructor-or-use-prototype-chain
demodulator.call(this,offset_frequency);
this.subtype=subtype;
this.filter={
min_passband: 100,
high_cut_limit: audio_context.sampleRate/2,
low_cut_limit: -audio_context.sampleRate/2
};
//Subtypes only define some filter parameters and the mod string sent to server,
//so you may set these parameters in your custom child class.
//Why? As of demodulation is done on the server, difference is mainly on the server side.
this.server_mod=subtype;
if(subtype=="lsb")
{
this.low_cut=-3000;
this.high_cut=-300;
this.server_mod="ssb";
}
else if(subtype=="usb")
{
this.low_cut=300;
this.high_cut=3000;
this.server_mod="ssb";
}
else if(subtype=="cw")
{
this.low_cut=700;
this.high_cut=900;
this.server_mod="ssb";
}
else if(subtype=="nfm")
{
this.low_cut=-4000;
this.high_cut=4000;
}
else if(subtype=="am")
{
this.low_cut=-4000;
this.high_cut=4000;
}
this.wait_for_timer=false;
this.set_after=false;
this.set=function()
{ //set() is a wrapper to call doset(), but it ensures that doset won't execute more frequently than demodulator_response_time.
if(!this.wait_for_timer)
{
this.doset(false);
this.set_after=false;
this.wait_for_timer=true;
timeout_this=this; //http://stackoverflow.com/a/2130411
window.setTimeout(function() {
timeout_this.wait_for_timer=false;
if(timeout_this.set_after) timeout_this.set();
},demodulator_response_time);
}
else
{
this.set_after=true;
}
}
this.doset=function(first_time)
{ //this function sends demodulator parameters to the server
ws.send("SET"+((first_time)?" mod="+this.server_mod:"")+
" low_cut="+this.low_cut.toString()+" high_cut="+this.high_cut.toString()+
" offset_freq="+this.offset_frequency.toString());
}
this.doset(true); //we set parameters on object creation
//******* envelope object *******
// for drawing the filter envelope above scale
this.envelope.parent=this;
this.envelope.draw=function(visible_range)
{
this.visible_range=visible_range;
this.drag_ranges=demod_envelope_draw(range,
center_freq+this.parent.offset_frequency+this.parent.low_cut,
center_freq+this.parent.offset_frequency+this.parent.high_cut,
this.color,center_freq+this.parent.offset_frequency);
};
// event handlers
this.envelope.drag_start=function(x, key_modifiers)
{
this.key_modifiers=key_modifiers;
this.dragged_range=demod_envelope_where_clicked(x,this.drag_ranges, key_modifiers);
//console.log("dragged_range: "+this.dragged_range.toString());
this.drag_origin={
x: x,
low_cut: this.parent.low_cut,
high_cut: this.parent.high_cut,
offset_frequency: this.parent.offset_frequency
};
return this.dragged_range!=demodulator.draggable_ranges.none;
};
this.envelope.drag_move=function(x)
{
dr=demodulator.draggable_ranges;
if(this.dragged_range==dr.none) return false; // we return if user is not dragging (us) at all
freq_change=Math.round(this.visible_range.hps*(x-this.drag_origin.x));
/*if(this.dragged_range==dr.beginning||this.dragged_range==dr.ending)
{
//we don't let the passband be too small
if(this.parent.low_cut+new_freq_change<=this.parent.high_cut-this.parent.filter.min_passband) this.freq_change=new_freq_change;
else return;
}
var new_value;*/
//dragging the line in the middle of the filter envelope while holding Shift does emulate
//the BFO knob on radio equipment: moving offset frequency, while passband remains unchanged
//Filter passband moves in the opposite direction than dragged, hence the minus below.
minus=(this.dragged_range==dr.bfo)?-1:1;
//dragging any other parts of the filter envelope while holding Shift does emulate the PBS knob
//(PassBand Shift) on radio equipment: PBS does move the whole passband without moving the offset
//frequency.
if(this.dragged_range==dr.beginning||this.dragged_range==dr.bfo||this.dragged_range==dr.pbs)
{
//we don't let low_cut go beyond its limits
if((new_value=this.drag_origin.low_cut+minus*freq_change)<this.parent.filter.low_cut_limit) return true;
//nor the filter passband be too small
if(this.parent.high_cut-new_value<this.parent.filter.min_passband) return true;
//sanity check to prevent GNU Radio "firdes check failed: fa <= fb"
if(new_value>=this.parent.high_cut) return true;
this.parent.low_cut=new_value;
}
if(this.dragged_range==dr.ending||this.dragged_range==dr.bfo||this.dragged_range==dr.pbs)
{
//we don't let high_cut go beyond its limits
if((new_value=this.drag_origin.high_cut+minus*freq_change)>this.parent.filter.high_cut_limit) return true;
//nor the filter passband be too small
if(new_value-this.parent.low_cut<this.parent.filter.min_passband) return true;
//sanity check to prevent GNU Radio "firdes check failed: fa <= fb"
if(new_value<=this.parent.low_cut) return true;
this.parent.high_cut=new_value;
}
if(this.dragged_range==dr.anything_else||this.dragged_range==dr.bfo)
{
//when any other part of the envelope is dragged, the offset frequency is changed (whole passband also moves with it)
new_value=this.drag_origin.offset_frequency+freq_change;
if(new_value>bandwidth/2||new_value<-bandwidth/2) return true; //we don't allow tuning above Nyquist frequency :-)
this.parent.offset_frequency=new_value;
}
//now do the actual modifications:
mkenvelopes(this.visible_range);
this.parent.set();
//will have to change this when changing to multi-demodulator mode:
e("webrx-actual-freq").innerHTML=format_frequency("{x} MHz",center_freq+this.parent.offset_frequency,1e6,4);
return true;
};
this.envelope.drag_end=function(x)
{ //in this demodulator we've already changed values in the drag_move() function so we shouldn't do too much here.
to_return=this.dragged_range!=demodulator.draggable_ranges.none; //this part is required for cliking anywhere on the scale to set offset
this.dragged_range=demodulator.draggable_ranges.none;
return to_return;
};
}
demodulator_default_analog.prototype=new demodulator();
function mkenvelopes(visible_range) //called from mkscale
{
scale_ctx.clearRect(0,0,scale_ctx.canvas.width,22); //clear the upper part of the canvas (where filter envelopes reside)
for (var i=0;i<demodulators.length;i++)
{
demodulators[i].envelope.draw(visible_range);
}
}
function demodulator_remove(which)
{
demodulators[which].stop();
demodulators.splice(which,1);
}
function demodulator_add(what)
{
demodulators.push(what);
mkenvelopes(get_visible_freq_range());
}
function demodulator_analog_replace(subtype)
{ //this function should only exist until the multi-demodulator capability is added
var temp_offset=0;
if(demodulators.length)
{
temp_offset=demodulators[0].offset_frequency;
demodulator_remove(0);
}
demodulator_add(new demodulator_default_analog(temp_offset,subtype));
}
function demodulator_set_offset_frequency(which,to_what)
{
if(to_what>bandwidth/2||to_what<-bandwidth/2) return;
demodulators[0].offset_frequency=Math.round(to_what);
demodulators[0].set();
mkenvelopes(get_visible_freq_range());
}
// ========================================================
// =================== SCALE ROUTINES ===================
// ========================================================
var scale_ctx;
var scale_canvas;
function scale_setup()
{
e("webrx-actual-freq").innerHTML=format_frequency("{x} MHz",canvas_get_frequency(window.innerWidth/2),1e6,4);
scale_canvas=e("openwebrx-scale-canvas");
scale_ctx=scale_canvas.getContext("2d");
scale_canvas.addEventListener("mousedown", scale_canvas_mousedown, false);
scale_canvas.addEventListener("mousemove", scale_canvas_mousemove, false);
scale_canvas.addEventListener("mouseup", scale_canvas_mouseup, false);
resize_scale();
}
var scale_canvas_drag_params={
mouse_down: false,
drag: false,
start_x: 0,
key_modifiers: {shiftKey:false, altKey: false, ctrlKey: false}
};
function scale_canvas_mousedown(evt)
{
with(scale_canvas_drag_params)
{
mouse_down=true;
drag=false;
start_x=evt.pageX;
key_modifiers.shiftKey=evt.shiftKey;
key_modifiers.altKey=evt.altKey;
key_modifiers.ctrlKey=evt.ctrlKey;
}
evt.preventDefault();
}
function scale_offset_freq_from_px(x, visible_range)
{
if(typeof visible_range === "undefined") visible_range=get_visible_freq_range();
return (visible_range.start+visible_range.bw*(x/canvas_container.clientWidth))-center_freq;
}
function scale_canvas_mousemove(evt)
{
var event_handled;
if(scale_canvas_drag_params.mouse_down&&!scale_canvas_drag_params.drag&&Math.abs(evt.pageX-scale_canvas_drag_params.start_x)>canvas_drag_min_delta)
//we can use the main drag_min_delta thing of the main canvas
{
scale_canvas_drag_params.drag=true;
//call the drag_start for all demodulators (and they will decide if they're dragged, based on X coordinate)
for (var i=0;i<demodulators.length;i++) event_handled|=demodulators[i].envelope.drag_start(evt.pageX,scale_canvas_drag_params.key_modifiers);
scale_canvas.style.cursor="move";
}
else if(scale_canvas_drag_params.drag)
{
//call the drag_move for all demodulators (and they will decide if they're dragged)
for (var i=0;i<demodulators.length;i++) event_handled|=demodulators[i].envelope.drag_move(evt.pageX);
if (!event_handled) demodulator_set_offset_frequency(0,scale_offset_freq_from_px(evt.pageX));
}
}
function scale_canvas_end_drag(x)
{
canvas_container.style.cursor="default";
scale_canvas_drag_params.drag=false;
scale_canvas_drag_params.mouse_down=false;
var event_handled=false;
for (var i=0;i<demodulators.length;i++) event_handled|=demodulators[i].envelope.drag_end(x);
//console.log(event_handled);
if (!event_handled) demodulator_set_offset_frequency(0,scale_offset_freq_from_px(x));
}
function scale_canvas_mouseup(evt)
{
scale_canvas_end_drag(evt.pageX);
}
function scale_px_from_freq(f,range) { return Math.round(((f-range.start)/range.bw)*canvas_container.clientWidth); }
function get_visible_freq_range()
{
out={};
fcalc=function(x) { return Math.round(((-zoom_offset_px+x)/canvases[0].clientWidth)*bandwidth)+(center_freq-bandwidth/2); }
out.start=fcalc(0);
out.center=fcalc(canvas_container.clientWidth/2);
out.end=fcalc(canvas_container.clientWidth);
out.bw=out.end-out.start;
out.hps=out.bw/canvas_container.clientWidth;
return out;
}
var scale_markers_levels=[
{
"large_marker_per_hz":10000000, //large
"estimated_text_width":70,
"format":"{x} MHz",
"pre_divide":1000000,
"decimals":0
},
{
"large_marker_per_hz":5000000,
"estimated_text_width":70,
"format":"{x} MHz",
"pre_divide":1000000,
"decimals":0
},
{
"large_marker_per_hz":1000000,
"estimated_text_width":70,
"format":"{x} MHz",
"pre_divide":1000000,
"decimals":0
},
{
"large_marker_per_hz":500000,
"estimated_text_width":70,
"format":"{x} MHz",
"pre_divide":1000000,
"decimals":1
},
{
"large_marker_per_hz":100000,
"estimated_text_width":70,
"format":"{x} MHz",
"pre_divide":1000000,
"decimals":1
},
{
"large_marker_per_hz":50000,
"estimated_text_width":70,
"format":"{x} MHz",
"pre_divide":1000000,
"decimals":2
},
{
"large_marker_per_hz":10000,
"estimated_text_width":70,
"format":"{x} MHz",
"pre_divide":1000000,
"decimals":2
},
{
"large_marker_per_hz":5000,
"estimated_text_width":70,
"format":"{x} MHz",
"pre_divide":1000000,
"decimals":3
},
{
"large_marker_per_hz":1000,
"estimated_text_width":70,
"format":"{x} MHz",
"pre_divide":1000000,
"decimals":1
}
];
var scale_min_space_bw_texts=50;
var scale_min_space_bw_small_markers=7;
function get_scale_mark_spacing(range)
{
out={};
fcalc=function(freq)
{
out.numlarge=(range.bw/freq);
out.large=canvas_container.clientWidth/out.numlarge; //distance between large markers (these have text)
out.ratio=5; //(ratio-1) small markers exist per large marker
out.small=out.large/out.ratio; //distance between small markers
if(out.small<scale_min_space_bw_small_markers) return false;
if(out.small/2>=scale_min_space_bw_small_markers&&freq.toString()[0]!="5") {out.small/=2; out.ratio*=2; }
out.smallbw=freq/out.ratio;
return true;
}
for(i=scale_markers_levels.length-1;i>=0;i--)
{
mp=scale_markers_levels[i];
if (!fcalc(mp.large_marker_per_hz)) continue;
//console.log(mp.large_marker_per_hz);
//console.log(out);
if (out.large-mp.estimated_text_width>scale_min_space_bw_texts) break;
}
out.params=mp;
return out;
}
function mkscale()
{
//clear the lower part of the canvas (where frequency scale resides; the upper part is used by filter envelopes):
range=get_visible_freq_range();
mkenvelopes(range); //when scale changes we will always have to redraw filter envelopes, too
scale_ctx.clearRect(0,22,scale_ctx.canvas.width,scale_ctx.canvas.height-22);
scale_ctx.strokeStyle = "#fff";
scale_ctx.font = "bold 11px sans-serif";
scale_ctx.textBaseline = "top";
scale_ctx.fillStyle = "#fff";
spacing=get_scale_mark_spacing(range);
//console.log(spacing);
marker_hz=Math.ceil(range.start/spacing.smallbw)*spacing.smallbw;
text_h_pos=22+10+((is_firefox)?3:0);
var text_to_draw;
var ftext=function(f) {text_to_draw=format_frequency(spacing.params.format,f,spacing.params.pre_divide,spacing.params.decimals);}
var last_large;
for(;;)
{
var x=scale_px_from_freq(marker_hz,range);
if(x>window.innerWidth) break;
scale_ctx.beginPath();
scale_ctx.moveTo(x, 22);
if(marker_hz%spacing.params.large_marker_per_hz==0)
{ //large marker
if(typeof first_large == "undefined") var first_large=marker_hz;
last_large=marker_hz;
scale_ctx.lineWidth=3.5;
scale_ctx.lineTo(x,22+11);
ftext(marker_hz);
var text_measured=scale_ctx.measureText(text_to_draw);
scale_ctx.textAlign = "center";
//advanced text drawing begins
if( zoom_level==0 && (range.start+spacing.smallbw*spacing.ratio>marker_hz) && (x<text_measured.width/2) )
{ //if this is the first overall marker when zoomed out... and if it would be clipped off the screen...
if(scale_px_from_freq(marker_hz+spacing.smallbw*spacing.ratio,range)-text_measured.width>=scale_min_space_bw_texts)
{ //and if we have enough space to draw it correctly without clipping
scale_ctx.textAlign = "left";
scale_ctx.fillText(text_to_draw, 0, text_h_pos);
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}
}
else if( zoom_level==0 && (range.end-spacing.smallbw*spacing.ratio<marker_hz) && (x>window.innerWidth-text_measured.width/2) )
{ // if this is the last overall marker when zoomed out... and if it would be clipped off the screen...
if(window.innerWidth-text_measured.width-scale_px_from_freq(marker_hz-spacing.smallbw*spacing.ratio,range)>=scale_min_space_bw_texts)
{ //and if we have enough space to draw it correctly without clipping
scale_ctx.textAlign = "right";
scale_ctx.fillText(text_to_draw, window.innerWidth, text_h_pos);
}
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}
else scale_ctx.fillText(text_to_draw, x, text_h_pos); //draw text normally
}
else
{ //small marker
scale_ctx.lineWidth=2;
scale_ctx.lineTo(x,22+8);
}
marker_hz+=spacing.smallbw;
scale_ctx.stroke();
}
if(zoom_level!=0)
{ // if zoomed, we don't want the texts to disappear because their markers can't be seen
// on the left side
scale_ctx.textAlign = "center";
var f=first_large-spacing.smallbw*spacing.ratio;
var x=scale_px_from_freq(f,range);
ftext(f);
var w=scale_ctx.measureText(text_to_draw).width;
if(x+w/2>0) scale_ctx.fillText(text_to_draw, x, 22+10);
// on the right side
f=last_large+spacing.smallbw*spacing.ratio;
x=scale_px_from_freq(f,range);
ftext(f);
w=scale_ctx.measureText(text_to_draw).width;
if(x-w/2<window.innerWidth) scale_ctx.fillText(text_to_draw, x, 22+10);
}
}
function resize_scale()
{
scale_ctx.canvas.width = window.innerWidth;
scale_ctx.canvas.height = 47;
mkscale();
}
function canvas_mouseover(evt)
{
if(!waterfall_setup_done) return;
//e("webrx-freq-show").style.visibility="visible";
}
function canvas_mouseout(evt)
{
if(!waterfall_setup_done) return;
//e("webrx-freq-show").style.visibility="hidden";
}
function canvas_get_freq_offset(relativeX)
{
rel=(relativeX/canvases[0].clientWidth);
return Math.round((bandwidth*rel)-(bandwidth/2));
}
function canvas_get_frequency(relativeX)
{
return center_freq+canvas_get_freq_offset(relativeX);
}
/*function canvas_format_frequency(relativeX)
{
return (canvas_get_frequency(relativeX)/1e6).toFixed(3)+" MHz";
}*/
function format_frequency(format, freq_hz, pre_divide, decimals)
{
out=format.replace("{x}",(freq_hz/pre_divide).toFixed(decimals));
at=out.indexOf(".")+4;
while(decimals>3)
{
out=out.substr(0,at)+","+out.substr(at);
at+=4;
decimals-=3;
}
return out;
}
canvas_drag=false;
canvas_drag_min_delta=1;
canvas_mouse_down=false;
function canvas_mousedown(evt)
{
canvas_mouse_down=true;
canvas_drag=false;
canvas_drag_last_x=canvas_drag_start_x=evt.pageX;
canvas_drag_last_y=canvas_drag_start_y=evt.pageY;
evt.preventDefault(); //don't show text selection mouse pointer
}
function canvas_mousemove(evt)
{
if(!waterfall_setup_done) return;
//element=e("webrx-freq-show");
relativeX=(evt.offsetX)?evt.offsetX:evt.layerX;
/*realX=(relativeX-element.clientWidth/2);
maxX=(canvases[0].clientWidth-element.clientWidth);
if(realX>maxX) realX=maxX;
if(realX<0) realX=0;
element.style.left=realX.toString()+"px";*/
if(canvas_mouse_down)
{
if(!canvas_drag&&Math.abs(evt.pageX-canvas_drag_start_x)>canvas_drag_min_delta)
{
canvas_drag=true;
canvas_container.style.cursor="move";
}
if(canvas_drag)
{
var deltaX=canvas_drag_last_x-evt.pageX;
var deltaY=canvas_drag_last_y-evt.pageY;
//zoom_center_where=zoom_center_where_calc(evt.pageX);
var dpx=range.hps*deltaX;
if(
!(zoom_center_rel+dpx>(bandwidth/2-canvas_container.clientWidth*(1-zoom_center_where)*range.hps)) &&
!(zoom_center_rel+dpx<-bandwidth/2+canvas_container.clientWidth*zoom_center_where*range.hps)
) { zoom_center_rel+=dpx; }
// -((canvases_new_width*(0.5+zoom_center_rel/bandwidth))-(winsize*zoom_center_where));
resize_canvases(false);
canvas_drag_last_x=evt.pageX;
canvas_drag_last_y=evt.pageY;
mkscale();
}
}
else e("webrx-mouse-freq").innerHTML=format_frequency("{x} MHz",canvas_get_frequency(relativeX),1e6,4);
}
function canvas_container_mouseout(evt)
{
canvas_end_drag();
}
//function body_mouseup() { canvas_end_drag(); console.log("body_mouseup"); }
//function window_mouseout() { canvas_end_drag(); console.log("document_mouseout"); }
function canvas_mouseup(evt)
{
if(!waterfall_setup_done) return;
relativeX=(evt.offsetX)?evt.offsetX:evt.layerX;
if(!canvas_drag)
{
//ws.send("SET offset_freq="+canvas_get_freq_offset(relativeX).toString());
demodulator_set_offset_frequency(0, canvas_get_freq_offset(relativeX));
e("webrx-actual-freq").innerHTML=format_frequency("{x} MHz",canvas_get_frequency(relativeX),1e6,4);
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}
else
{
canvas_end_drag();
}
canvas_mouse_down=false;
}
function canvas_end_drag()
{
canvas_container.style.cursor="crosshair";
canvas_mouse_down=false;
}
function zoom_center_where_calc(screenposX)
{
//return (screenposX-(window.innerWidth-canvas_container.clientWidth))/canvas_container.clientWidth;
return screenposX/canvas_container.clientWidth;
}
function canvas_mousewheel(evt)
{
if(!waterfall_setup_done) return;
//var i=Math.abs(evt.wheelDelta);
//var dir=(i/evt.wheelDelta)<0;
//console.log(evt);
var relativeX=(evt.offsetX)?evt.offsetX:evt.layerX;
var dir=(evt.deltaY/Math.abs(evt.deltaY))>0;
//console.log(dir);
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//i/=120;
/*while (i--)*/ zoom_step(dir, relativeX, zoom_center_where_calc(evt.pageX));
evt.preventDefault();
//evt.returnValue = false; //disable scrollbar move
}
zoom_max_level_hps=33; //Hz/pixel
zoom_levels_count=5;
function get_zoom_coeff_from_hps(hps)
{
var shown_bw=(window.innerWidth*hps);
return bandwidth/shown_bw;
}
zoom_levels=[1];
zoom_level=0;
zoom_freq=0;
zoom_offset_px=0;
zoom_center_rel=0;
zoom_center_where=0;
function mkzoomlevels()
{
zoom_levels=[1];
maxc=get_zoom_coeff_from_hps(zoom_max_level_hps);
if(maxc<1) return;
for(i=1;i<zoom_levels_count;i++)
zoom_levels.push(1+(maxc-1)*(i/(zoom_levels_count-1)));
}
function zoom_step(out, where, onscreen)
{
if((out&&zoom_level==0)||(!out&&zoom_level>=zoom_levels_count-1)) return;
if(out) --zoom_level;
else ++zoom_level;
zoom_center_rel=canvas_get_freq_offset(where);
//console.log("zoom_step || zlevel: "+zoom_level.toString()+" zlevel_val: "+zoom_levels[zoom_level].toString()+" zoom_center_rel: "+zoom_center_rel.toString());
zoom_center_where=onscreen;
resize_canvases(true);
mkscale();
}
function zoom_calc()
{
winsize=canvas_container.clientWidth;
var canvases_new_width=winsize*zoom_levels[zoom_level];
zoom_offset_px=-((canvases_new_width*(0.5+zoom_center_rel/bandwidth))-(winsize*zoom_center_where));
if(zoom_offset_px>0) zoom_offset_px=0;
if(zoom_offset_px<winsize-canvases_new_width)
zoom_offset_px=winsize-canvases_new_width;
//console.log("zoom_calc || zopx:"+zoom_offset_px.toString()+ " maxoff:"+(winsize-canvases_new_width).toString()+" relval:"+(0.5+zoom_center_rel/bandwidth).toString() );
}
function resize_waterfall_container(check_init)
{
if(check_init&&!waterfall_setup_done) return;
canvas_container.style.height=(window.innerHeight-e("webrx-top-container").clientHeight-e("openwebrx-scale-container").clientHeight).toString()+"px";
}
debug_ws_data_received=0;
max_clients_num=0;
var COMPRESS_FFT_PAD_N=10; //should be the same as in csdr.c
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function on_ws_recv(evt)
{
if(!(evt.data instanceof ArrayBuffer)) { divlog("on_ws_recv(): Not ArrayBuffer received...",1); return; }
//
debug_ws_data_received+=evt.data.byteLength/1000;
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firstChars=getFirstChars(evt.data,3);
if(firstChars=="CLI")
{
var stringData=arrayBufferToString(evt.data);
if(stringData.substring(0,16)=="CLIENT DE SERVER") divlog("Acknowledged WebSocket connection: "+stringData);
}
if(firstChars=="AUD")
{
var audio_data;
if(audio_compression=="adpcm") audio_data=new Uint8Array(evt.data,4)
else audio_data=new Int16Array(evt.data,4);
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audio_prepare(audio_data);
audio_buffer_current_size_debug+=audio_data.length;
audio_buffer_all_size_debug+=audio_data.length;
if(audio_initialized==0 && audio_prepared_buffers.length>audio_buffering_fill_to) audio_init()
}
else if(firstChars=="FFT")
{
//alert("Yupee! Doing FFT");
if(fft_compression=="none") waterfall_add_queue(new Float32Array(evt.data,4));
else if(fft_compression="adpcm")
{
fft_codec.reset();
var waterfall_i16=fft_codec.decode(new Uint8Array(evt.data,4));
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);
}
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} else if(firstChars=="MSG")
{
/*try
{*/
var stringData=arrayBufferToString(evt.data);
params=stringData.substring(4).split(" ");
for(i=0;i<params.length;i++)
{
param=params[i].split("=");
switch(param[0])
{
case "setup":
waterfall_init();
break;
case "bandwidth":
bandwidth=parseInt(param[1]);
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break;
case "center_freq":
center_freq=parseInt(param[1]); //there was no ; and it was no problem... why?
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break;
case "fft_size":
fft_size=parseInt(param[1]);
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break;
case "fft_fps":
fft_fps=parseInt(param[1]);
break;
case "audio_compression":
audio_compression=param[1];
divlog( "Audio stream is "+ ((audio_compression=="adpcm")?"compressed":"uncompressed")+"." )
break;
case "fft_compression":
fft_compression=param[1];
divlog( "FFT stream is "+ ((fft_compression=="adpcm")?"compressed":"uncompressed")+"." )
break;
case "cpu_usage":
var server_cpu_usage=parseInt(param[1]);
progressbar_set(e("openwebrx-bar-server-cpu"),server_cpu_usage/100,"Server CPU ["+param[1]+"%]",server_cpu_usage>85);
break;
case "clients":
var clients_num=parseInt(param[1]);
progressbar_set(e("openwebrx-bar-clients"),clients_num/max_clients_num,"Clients ["+param[1]+"]",clients_num>max_clients_num*0.85);
break;
case "max_clients":
max_clients_num=parseInt(param[1]);
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break;
}
}
/*}
catch(err)
{
divlog("Received invalid message over WebSocket.");
}*/
}
}
function add_problem(what)
{
problems_span=e("openwebrx-problems");
for(var i=0;i<problems_span.children.length;i++) if(problems_span.children[i].innerHTML==what) return;
new_span = document.createElement("span");
new_span.innerHTML=what;
problems_span.appendChild(new_span);
window.setTimeout(function(ps,ns) { ps.removeChild(ns); }, 1000,problems_span,new_span);
}
waterfall_measure_minmax=false;
waterfall_measure_minmax_min=1e100;
waterfall_measure_minmax_max=-1e100;
function waterfall_measure_minmax_do(what)
{
waterfall_measure_minmax_min=Math.min(waterfall_measure_minmax_min,Math.min.apply(Math,what));
waterfall_measure_minmax_max=Math.max(waterfall_measure_minmax_max,Math.max.apply(Math,what));
}
function waterfall_measure_minmax_print()
{
console.log("Waterfall | min = "+waterfall_measure_minmax_min.toString()+" dB | max = "+waterfall_measure_minmax_max.toString()+" dB");
}
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function waterfall_add_queue(what)
{
if(waterfall_measure_minmax) waterfall_measure_minmax_do(what);
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waterfall_queue.push(what);
}
function waterfall_dequeue()
{
if(waterfall_queue.length) waterfall_add(waterfall_queue.shift());
if(waterfall_queue.length>Math.max(fft_fps/2,20)) //in case of emergency
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{
console.log("waterfall queue length:", waterfall_queue.length);
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add_problem("fft overflow");
while(waterfall_queue.length) waterfall_add(waterfall_queue.shift());
}
}
function on_ws_opened()
{
ws.send("SERVER DE CLIENT openwebrx.js");
divlog("WebSocket opened to "+ws_url);
}
var was_error=0;
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function divlog(what, is_error)
{
is_error=!!is_error;
was_error |= is_error;
if(is_error)
{
what="<span class=\"webrx-error\">"+what+"</span>";
if(e("openwebrx-panel-log").openwebrxHidden) toggle_panel("openwebrx-panel-log"); //show panel if any error is present
}
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e("openwebrx-debugdiv").innerHTML+=what+"<br />";
var wls=e("openwebrx-log-scroll");
wls.scrollTop=wls.scrollHeight; //scroll to bottom
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}
var audio_context;
var audio_initialized=0;
var audio_received = Array();
var audio_buffer_index = 0;
var audio_resampler=new sdrjs.RationalResamplerFF(4,1);
var audio_codec=new sdrjs.ImaAdpcm();
var audio_compression="unknown";
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var audio_node;
//var audio_received_sample_rate = 48000;
var audio_input_buffer_size;
// Optimalise these if audio lags or is choppy:
var audio_buffer_size = 4096;//2048 was choppy
var audio_buffer_maximal_length_sec=3; //actual number of samples are calculated from sample rate
var audio_buffer_decrease_to_on_overrun_sec=2.2;
var audio_flush_interval_ms=500; //the interval in which audio_flush() is called
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var audio_prepared_buffers = Array();
var audio_rebuffer = new sdrjs.Rebuffer(audio_buffer_size,sdrjs.REBUFFER_FIXED);
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var audio_last_output_buffer = new Float32Array(audio_buffer_size);
var audio_last_output_offset = 0;
var audio_buffering = false;
//var audio_buffering_fill_to=4; //on audio underrun we wait until this n*audio_buffer_size samples are present
//tnx to the hint from HA3FLT, now we have about half the response time! (original value: 10)
function gain_ff(gain_value,data) //great! solved clicking! will have to move to sdr.js
{
for(var i=0;i<data.length;i++)
data[i]*=gain_value;
return data;
}
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function audio_prepare(data)
{
//audio_rebuffer.push(sdrjs.ConvertI16_F(data));//no resampling
//audio_rebuffer.push(audio_resampler.process(sdrjs.ConvertI16_F(data)));//resampling without ADPCM
if(audio_compression=="none")
audio_rebuffer.push(audio_resampler.process(gain_ff(0.9,sdrjs.ConvertI16_F(data))));//resampling without ADPCM
else if(audio_compression=="adpcm")
audio_rebuffer.push(audio_resampler.process(gain_ff(0.9,sdrjs.ConvertI16_F(audio_codec.decode(data))))); //resampling & ADPCM
else return;
//console.log("prepare",data.length,audio_rebuffer.remaining());
while(audio_rebuffer.remaining())
{
audio_prepared_buffers.push(audio_rebuffer.take());
audio_buffer_current_count_debug++;
}
if(audio_buffering && audio_prepared_buffers.length>audio_buffering_fill_to) audio_buffering=false;
}
function audio_prepare_without_resampler(data)
{
audio_rebuffer.push(sdrjs.ConvertI16_F(data));
console.log("prepare",data.length,audio_rebuffer.remaining());
while(audio_rebuffer.remaining())
{
audio_prepared_buffers.push(audio_rebuffer.take());
audio_buffer_current_count_debug++;
}
if(audio_buffering && audio_prepared_buffers.length>audio_buffering_fill_to) audio_buffering=false;
}
function audio_prepare_old(data)
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{
//console.log("audio_prepare :: "+data.length.toString());
//console.log("data.len = "+data.length.toString());
var dopush=function()
{
console.log(audio_last_output_buffer);
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audio_prepared_buffers.push(audio_last_output_buffer);
audio_last_output_offset=0;
audio_last_output_buffer=new Float32Array(audio_buffer_size);
audio_buffer_current_count_debug++;
};
var original_data_length=data.length;
var f32data=new Float32Array(data.length);
for(var i=0;i<data.length;i++) f32data[i]=data[i]/32768; //convert_i16_f
data=audio_resampler.process(f32data);
console.log(data,data.length,original_data_length);
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if(data.length==0) return;
if(audio_last_output_offset+data.length<=audio_buffer_size)
{ //array fits into output buffer
for(var i=0;i<data.length;i++) audio_last_output_buffer[i+audio_last_output_offset]=data[i];
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audio_last_output_offset+=data.length;
console.log("fits into; offset="+audio_last_output_offset.toString());
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if(audio_last_output_offset==audio_buffer_size) dopush();
}
else
{ //array is larger than the remaining space in the output buffer
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var copied=audio_buffer_size-audio_last_output_offset;
var remain=data.length-copied;
for(var i=0;i<audio_buffer_size-audio_last_output_offset;i++) //fill the remaining space in the output buffer
audio_last_output_buffer[i+audio_last_output_offset]=data[i];///32768;
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dopush();//push the output buffer and create a new one
console.log("larger than; copied half: "+copied.toString()+", now at: "+audio_last_output_offset.toString());
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for(var i=0;i<remain;i++) //copy the remaining input samples to the new output buffer
audio_last_output_buffer[i]=data[i+copied];///32768;
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audio_last_output_offset+=remain;
console.log("larger than; remained: "+remain.toString()+", now at: "+audio_last_output_offset.toString());
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}
if(audio_buffering && audio_prepared_buffers.length>audio_buffering_fill_to) audio_buffering=false;
}
if (!AudioBuffer.prototype.copyToChannel)
{ //Chrome 36 does not have it, Firefox does
AudioBuffer.prototype.copyToChannel=function(input,channel) //input is Float32Array
{
var cd=this.getChannelData(channel);
for(var i=0;i<input.length;i++) cd[i]=input[i];
}
}
function audio_onprocess(e)
{
//console.log("audio onprocess");
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if(audio_buffering) return;
if(audio_prepared_buffers.length==0) { audio_buffer_progressbar_update(); /*add_problem("audio underrun");*/ audio_buffering=true; }
else { e.outputBuffer.copyToChannel(audio_prepared_buffers.shift(),0); }
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}
var audio_buffer_progressbar_update_disabled=false;
var audio_buffer_total_average_level=0;
var audio_buffer_total_average_level_length=0;
function audio_buffer_progressbar_update()
{
if(audio_buffer_progressbar_update_disabled) return;
var audio_buffer_value=(audio_prepared_buffers.length*audio_buffer_size)/44100;
audio_buffer_total_average_level_length++; audio_buffer_total_average_level=(audio_buffer_total_average_level*((audio_buffer_total_average_level_length-1)/audio_buffer_total_average_level_length))+(audio_buffer_value/audio_buffer_total_average_level_length);
var overrun=audio_buffer_value>audio_buffer_maximal_length_sec;
var underrun=audio_prepared_buffers.length==0;
var text="buffer";
if(overrun) text="overrun";
if(underrun) text="underrun";
if(overrun||underrun)
{
audio_buffer_progressbar_update_disabled=true;
window.setTimeout(function(){audio_buffer_progressbar_update_disabled=false; audio_buffer_progressbar_update();},1000);
}
progressbar_set(e("openwebrx-bar-audio-buffer"),(underrun)?1:audio_buffer_value/1.5,"Audio "+text+" ["+(audio_buffer_value).toFixed(1)+" s]",overrun||underrun||audio_buffer_value<0.25);
}
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function audio_flush()
{
flushed=false;
we_have_more_than=function(sec){ return sec*audio_context.sampleRate<audio_prepared_buffers.length*audio_buffer_size; }
if(we_have_more_than(audio_buffer_maximal_length_sec)) while(we_have_more_than(audio_buffer_decrease_to_on_overrun_sec))
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{
if(!flushed) audio_buffer_progressbar_update();
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flushed=true;
audio_prepared_buffers.shift();
}
//if(flushed) add_problem("audio overrun");
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}
function audio_onprocess_notused(e)
{
//https://github.com/0xfe/experiments/blob/master/www/tone/js/sinewave.js
if(audio_received.length==0)
{ add_problem("audio underrun"); return; }
output = e.outputBuffer.getChannelData(0);
int_buffer = audio_received[0];
read_remain = audio_buffer_size;
//audio_buffer_maximal_length=120;
obi=0; //output buffer index
debug_str=""
while(1)
{
if(int_buffer.length-audio_buffer_index>read_remain)
{
for (i=audio_buffer_index; i<audio_buffer_index+read_remain; i++)
output[obi++] = int_buffer[i]/32768;
//debug_str+="added whole ibl="+int_buffer.length.toString()+" abi="+audio_buffer_index.toString()+" "+(int_buffer.length-audio_buffer_index).toString()+">"+read_remain.toString()+" obi="+obi.toString()+"\n";
audio_buffer_index+=read_remain;
break;
}
else
{
for (i=audio_buffer_index; i<int_buffer.length; i++)
output[obi++] = int_buffer[i]/32768;
read_remain-=(int_buffer.length-audio_buffer_index);
audio_buffer_current_size-=audio_received[0].length;
/*if (audio_received.length>audio_buffer_maximal_length)
{
add_problem("audio overrun");
audio_received.splice(0,audio_received.length-audio_buffer_maximal_length);
}
else*/
audio_received.splice(0,1);
//debug_str+="added remain, remain="+read_remain.toString()+" abi="+audio_buffer_index.toString()+" alen="+int_buffer.length.toString()+" i="+i.toString()+" arecva="+audio_received.length.toString()+" obi="+obi.toString()+"\n";
audio_buffer_index = 0;
if(audio_received.length == 0 || read_remain == 0) return;
int_buffer = audio_received[0];
}
}
//debug_str+="obi="+obi.toString();
//alert(debug_str);
}
function audio_flush_notused()
{
if (audio_buffer_current_size>audio_buffer_maximal_length_sec*audio_context.sampleRate)
{
add_problem("audio overrun");
console.log("audio_flush() :: size: "+audio_buffer_current_size.toString()+" allowed: "+(audio_buffer_maximal_length_sec*audio_context.sampleRate).toString());
while (audio_buffer_current_size>audio_buffer_maximal_length_sec*audio_context.sampleRate*0.5)
{
audio_buffer_current_size-=audio_received[0].length;
audio_received.splice(0,1);
}
}
}
function webrx_set_param(what, value)
{
ws.send("SET "+what+"="+value.toString());
}
function audio_init()
{
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audio_debug_time_start=(new Date()).getTime();
audio_debug_time_last_start=audio_debug_time_start;
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//https://github.com/0xfe/experiments/blob/master/www/tone/js/sinewave.js
audio_initialized=1; // only tell on_ws_recv() not to call it again
try
{
window.AudioContext = window.AudioContext||window.webkitAudioContext;
audio_context = new AudioContext();
}
catch(e)
{
divlog('Your browser does not support Web Audio API, which is required for WebRX to run. Please upgrade to a HTML5 compatible browser.', 1);
}
//on Chrome v36, createJavaScriptNode has been replaced by createScriptProcessor
createjsnode_function = (audio_context.createJavaScriptNode == undefined)?audio_context.createScriptProcessor.bind(audio_context):audio_context.createJavaScriptNode.bind(audio_context);
audio_node = createjsnode_function(audio_buffer_size, 0, 1);
audio_node.onaudioprocess = audio_onprocess;
audio_node.connect(audio_context.destination);
// --- Resampling ---
//https://github.com/grantgalitz/XAudioJS/blob/master/XAudioServer.js
//audio_resampler = new Resampler(audio_received_sample_rate, audio_context.sampleRate, 1, audio_buffer_size, true);
//audio_input_buffer_size = audio_buffer_size*(audio_received_sample_rate/audio_context.sampleRate);
webrx_set_param("audio_rate",audio_context.sampleRate); //Don't try to resample //TODO remove this
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window.setInterval(audio_flush,audio_flush_interval_ms);
divlog('Web Audio API succesfully initialized, sample rate: '+audio_context.sampleRate.toString()+ " sps");
/*audio_source=audio_context.createBufferSource();
audio_buffer = audio_context.createBuffer(xhr.response, false);
audio_source.buffer = buffer;
audio_source.noteOn(0);*/
demodulator_analog_replace('nfm'); //needs audio_context.sampleRate to exist
//hide log panel in a second (if user has not hidden it yet)
window.setTimeout(function(){
if(typeof e("openwebrx-panel-log").openwebrxHidden == "undefined" && !was_error)
{
animate(e("openwebrx-panel-log"),"opacity","",1,0,0.9,1000,60);
window.setTimeout(function(){toggle_panel("openwebrx-panel-log");e("openwebrx-panel-log").style.opacity="1";},1200)
}
},1000);
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}
function on_ws_closed()
{
try
{
audio_node.disconnect();
}
catch (dont_care) {}
divlog("WebSocket has closed unexpectedly. Please reload the page.", 1);
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}
function on_ws_error(event)
{
divlog("WebSocket error.",1);
}
String.prototype.startswith=function(str){ return this.indexOf(str) == 0; }; //http://stackoverflow.com/questions/646628/how-to-check-if-a-string-startswith-another-string
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function open_websocket()
{
//if(ws_url.startswith("ws://localhost:")&&window.location.hostname!="127.0.0.1"&&window.location.hostname!="localhost")
//{
//divlog("Server administrator should set <em>server_hostname</em> correctly, because it is left as <em>\"localhost\"</em>. Now guessing hostname from page URL.",1);
ws_url="ws://"+(window.location.origin.split("://")[1])+"/ws/"; //guess automatically -> now default behaviour
//}
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if (!("WebSocket" in window))
divlog("Your browser does not support WebSocket, which is required for WebRX to run. Please upgrade to a HTML5 compatible browser.");
ws = new WebSocket(ws_url+client_id);
ws.onopen = on_ws_opened;
ws.onmessage = on_ws_recv;
ws.onclose = on_ws_closed;
ws.binaryType = "arraybuffer";
window.onbeforeunload = function() { //http://stackoverflow.com/questions/4812686/closing-websocket-correctly-html5-javascript
ws.onclose = function () {};
ws.close();
};
ws.onerror = on_ws_error;
}
//var color_scale=[0xFFFFFFFF, 0x000000FF];
//var color_scale=[0x000000FF, 0x000000FF, 0x3a0090ff, 0x10c400ff, 0xffef00ff, 0xff5656ff];
//var color_scale=[0x000000FF, 0x000000FF, 0x534b37ff, 0xcedffaff, 0x8899a9ff, 0xfff775ff, 0xff8a8aff, 0xb20000ff];
//var color_scale=[ 0x000000FF, 0xff5656ff, 0xffffffff];
//2014-04-22
var color_scale=[0x000000ff,0x2e6893ff, 0x69a5d0ff, 0x214b69ff, 0x9dc4e0ff, 0xfff775ff, 0xff8a8aff, 0xb20000ff]
//2015-04-10
//var color_scale=[0x112634ff,0x4991c6ff,0x18364cff,0x9dc4e0ff,0xfff775ff,0xff9f60,0xff4d4dff,0x8d0000ff];
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function waterfall_mkcolor(db_value)
{
min_value=-115; //in dB
max_value=0;
if(db_value<min_value) db_value=min_value;
if(db_value>max_value) db_value=max_value;
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full_scale=max_value-min_value;
relative_value=db_value-min_value;
value_percent=relative_value/full_scale;
percent_for_one_color=1/(color_scale.length-1);
index=Math.floor(value_percent/percent_for_one_color);
remain=(value_percent-percent_for_one_color*index)/percent_for_one_color;
return color_between(color_scale[index+1],color_scale[index],remain);
}
function color_between(first, second, percent)
{
output=0;
for(i=0;i<4;i++)
{
add = ((((first&(0xff<<(i*8)))>>>0)*percent) + (((second&(0xff<<(i*8)))>>>0)*(1-percent))) & (0xff<<(i*8));
output |= add>>>0;
}
return output>>>0;
}
var canvas_context;
var canvases = [];
var canvas_default_height = 200;
var canvas_container;
var canvas_phantom;
function add_canvas()
{
new_canvas = document.createElement("canvas");
new_canvas.width=fft_size;
new_canvas.height=canvas_default_height;
canvas_actual_line=canvas_default_height-1;
new_canvas.style.width=(canvas_container.clientWidth*zoom_levels[zoom_level]).toString()+"px";
new_canvas.style.left=zoom_offset_px.toString()+"px";
new_canvas.style.height=canvas_default_height.toString()+"px";
new_canvas.openwebrx_top=(-canvas_default_height+1);
new_canvas.style.top=new_canvas.openwebrx_top.toString()+"px";
canvas_context = new_canvas.getContext("2d");
canvas_container.appendChild(new_canvas);
new_canvas.addEventListener("mouseover", canvas_mouseover, false);
new_canvas.addEventListener("mouseout", canvas_mouseout, false);
new_canvas.addEventListener("mousemove", canvas_mousemove, false);
new_canvas.addEventListener("mouseup", canvas_mouseup, false);
new_canvas.addEventListener("mousedown", canvas_mousedown, false);
new_canvas.addEventListener("wheel",canvas_mousewheel, false);
canvases.push(new_canvas);
}
function init_canvas_container()
{
canvas_container=e("webrx-canvas-container");
canvas_container.addEventListener("mouseout",canvas_container_mouseout, false);
//window.addEventListener("mouseout",window_mouseout,false);
//document.body.addEventListener("mouseup",body_mouseup,false);
canvas_phantom=e("openwebrx-phantom-canvas");
canvas_phantom.addEventListener("mouseover", canvas_mouseover, false);
canvas_phantom.addEventListener("mouseout", canvas_mouseout, false);
canvas_phantom.addEventListener("mousemove", canvas_mousemove, false);
canvas_phantom.addEventListener("mouseup", canvas_mouseup, false);
canvas_phantom.addEventListener("mousedown", canvas_mousedown, false);
canvas_phantom.addEventListener("wheel",canvas_mousewheel, false);
canvas_phantom.style.width=canvas_container.clientWidth+"px";
add_canvas();
}
canvas_maxshift=0;
function shift_canvases()
{
canvases.forEach(function(p)
{
p.style.top=(p.openwebrx_top++).toString()+"px";
});
canvas_maxshift++;
if(canvas_container.clientHeight>canvas_maxshift)
{
canvas_phantom.style.top=canvas_maxshift.toString()+"px";
canvas_phantom.style.height=(canvas_container.clientHeight-canvas_maxshift).toString()+"px";
canvas_phantom.style.display="block";
}
else
canvas_phantom.style.display="none";
//canvas_container.style.height=(((canvases.length-1)*canvas_default_height)+(canvas_default_height-canvas_actual_line)).toString()+"px";
//canvas_container.style.height="100%";
}
function resize_canvases(zoom)
{
if(typeof zoom == "undefined") zoom=false;
if(!zoom) mkzoomlevels();
zoom_calc();
new_width=(canvas_container.clientWidth*zoom_levels[zoom_level]).toString()+"px";
var zoom_value=zoom_offset_px.toString()+"px";
canvases.forEach(function(p)
{
p.style.width=new_width;
p.style.left=zoom_value;
});
canvas_phantom.style.width=new_width;
canvas_phantom.style.left=zoom_value;
}
function waterfall_init()
{
init_canvas_container();
waterfall_timer = window.setInterval(waterfall_dequeue,900/fft_fps);
resize_waterfall_container(false); /* then */ resize_canvases();
scale_setup();
mkzoomlevels();
waterfall_setup_done=1;
}
var waterfall_dont_scale=0;
function waterfall_add(data)
{
if(!waterfall_setup_done) return;
var w=fft_size;
//waterfall_shift();
// ==== do scaling if required ====
/*if(waterfall_dont_scale)
{
scaled=data;
for(i=scaled.length;i<w;i++) scaled[i]=-100;
}
else
{
if ((to-from)==w)
{
scaled=data;
}
else if ((to-from)<w)
{ //make line bigger
pixel_per_point=w/(to-from);
scaled=Array();
j=0;
remain=pixel_per_point;
for(i=0; i<w; i++)
{
//thiscolor=data[j]*(remain-floor(remain))+data[j+1]*(1-(remain-floor(remain)))
//nextcolor=data[j+1]*(remain-floor(remain))+data[j+2]*(1-(remain-floor(remain)))
if(remain>1)
{
scaled[i]=data[j]*(remain/pixel_per_point)+data[j+1]*((1-remain)/pixel_per_point);
remain--;
}
else
{
j++;
scaled[i]=data[j]*(remain/pixel_per_point)+data[j+1]*((1-remain)/pixel_per_point);
remain=pixel_per_point-(1-remain);
}
}
}
else
{ //make line smaller (linear decimation, moving average)
point_per_pixel=(to-from)/w;
scaled=Array();
j=0;
remain=point_per_pixel;
last_pixel=0;
for(i=from; i<to; i++)
{
if(remain>1)
{
last_pixel+=data[i];
remain--;
}
else
{
last_pixel+=data[i]*remain;
scaled[j++]=last_pixel/point_per_pixel;
last_pixel=data[i]*(1-remain);
remain=point_per_pixel-(1-remain); //?
}
}
}
}
//Add line to waterfall image
base=(h-1)*w*4;
for(x=0;x<w;x++)
{
color=waterfall_mkcolor(scaled[x]);
for(i=0;i<4;i++)
waterfall_image.data[base+x*4+i] = ((color>>>0)>>((3-i)*8))&0xff;
}*/
//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;
}
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//Draw image
canvas_context.putImageData(oneline_image, 0, canvas_actual_line--);
shift_canvases();
if(canvas_actual_line<0) add_canvas();
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//divlog("Drawn FFT");
}
/*
function waterfall_shift()
{
w=canvas.width;
h=canvas.height;
for(y=0; y<h-1; y++)
{
for(i=0; i<w*4; i++)
waterfall_image.data[y*w*4+i] = waterfall_image.data[(y+1)*w*4+i];
}
}*/
function check_top_bar_congestion()
{
var rmf=function(x){ return x.offsetLeft+x.offsetWidth; };
var wet=e("webrx-rx-title");
var wed=e("webrx-rx-desc");
var rightmost=Math.max(rmf(wet),rmf(wed));
var tl=e("openwebrx-main-buttons");
[wet, wed].map(function(what) {
if(rmf(what)>tl.offsetLeft-20) what.style.opacity=what.style.opacity="0";
else wet.style.opacity=wed.style.opacity="1";
});
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}
function openwebrx_resize()
{
resize_canvases();
resize_waterfall_container(true);
resize_scale();
check_top_bar_congestion();
}
function openwebrx_init()
{
init_rx_photo();
open_websocket();
place_panels();
window.setTimeout(function(){window.setInterval(debug_audio,1000);},1000);
window.addEventListener("resize",openwebrx_resize);
check_top_bar_congestion();
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}
/*
window.setInterval(function(){
sum=0;
for(i=0;i<audio_received.length;i++)
sum+=audio_received[i].length;
divlog("audio buffer bytes: "+sum);
}, 2000);*/
/*function email(what)
{
//| http://stackoverflow.com/questions/617647/where-is-my-one-line-implementation-of-rot13-in-javascript-going-wrong
what=what.replace(/[a-zA-Z]/g,function(c){return String.fromCharCode((c<="Z"?90:122)>=(c=c.charCodeAt(0)+13)?c:c-26);});
window.location.href="mailto:"+what;
}*/
var rt = function (s,n) {return s.replace(/[a-zA-Z]/g,function(c){return String.fromCharCode((c<="Z"?90:122)>=(c=c.charCodeAt(0)+n)?c:c-26);});}
var irt = function (s,n) {return s.replace(/[a-zA-Z]/g,function(c){return String.fromCharCode((c>="a"?97:65)<=(c=c.charCodeAt(0)-n)?c:c+26);});}
var sendmail2 = function (s) { window.location.href="mailto:"+irt(s.replace("=",String.fromCharCode(0100)).replace("$","."),8); }
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var audio_debug_time_start=0;
var audio_debug_time_last_start=0;
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function debug_audio()
{
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if(audio_debug_time_start==0) return; //audio_init has not been called
time_now=(new Date()).getTime();
audio_debug_time_since_last_call=(time_now-audio_debug_time_last_start)/1000;
audio_debug_time_last_start=time_now; //now
audio_debug_time_taken=(time_now-audio_debug_time_start)/1000;
kbps_mult=(audio_compression=="adpcm")?8:16;
//e("openwebrx-audio-sps").innerHTML=
// ((audio_compression=="adpcm")?"ADPCM compressed":"uncompressed")+" audio downlink:<br/> "+(audio_buffer_current_size_debug*kbps_mult/audio_debug_time_since_last_call).toFixed(0)+" kbps ("+
// (audio_buffer_all_size_debug*kbps_mult/audio_debug_time_taken).toFixed(1)+" kbps avg.), feed at "+
// ((audio_buffer_current_count_debug*audio_buffer_size)/audio_debug_time_taken).toFixed(1)+" sps output";
var audio_speed_value=audio_buffer_current_size_debug*kbps_mult/audio_debug_time_since_last_call;
progressbar_set(e("openwebrx-bar-audio-speed"),audio_speed_value/500000,"Audio stream ["+(audio_speed_value/1000).toFixed(0)+" kbps]",false);
var audio_output_value=(audio_buffer_current_count_debug*audio_buffer_size)/audio_debug_time_taken;
progressbar_set(e("openwebrx-bar-audio-output"),audio_output_value/55000,"Audio output ["+(audio_output_value/1000).toFixed(1)+" ksps]",audio_output_value>55000||audio_output_value<10000);
audio_buffer_progressbar_update();
var network_speed_value=debug_ws_data_received/audio_debug_time_taken;
progressbar_set(e("openwebrx-bar-network-speed"),network_speed_value*8/2000,"Network usage ["+(network_speed_value*8).toFixed(1)+" kbps]",false);
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audio_buffer_current_size_debug=0;
if(waterfall_measure_minmax) waterfall_measure_minmax_print();
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}
// ========================================================
// ======================= PANELS =======================
// ========================================================
panel_margin=5.9;
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function pop_bottommost_panel(from)
{
min_order=parseInt(from[0].dataset.panelOrder);
min_index=0;
for(i=0;i<from.length;i++)
{
actual_order=parseInt(from[i].dataset.panelOrder);
if(actual_order<min_order)
{
min_index=i;
min_order=actual_order;
}
}
to_return=from[min_index];
from.splice(min_index,1);
return to_return;
}
function toggle_panel(what)
{
var item=e(what);
if(item.openwebrxDisableClick) return;
item.openwebrxHidden=!item.openwebrxHidden;
place_panels();
item.openwebrxDisableClick=true;
window.setTimeout(function(){item.openwebrxDisableClick=false;},100);
}
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function place_panels()
{
var hoffset=0; //added this because the first panel should not have such great gap below
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var left_col=[];
var right_col=[];
var plist=e("openwebrx-panels-container").children;
for(i=0;i<plist.length;i++)
{
c=plist[i];
if(c.className=="openwebrx-panel")
{
if(c.openwebrxHidden)
{
c.style.display="none";
continue;
}
c.style.display="block";
c.openwebrxPanelTransparent=(!!c.dataset.panelTransparent);
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newSize=c.dataset.panelSize.split(",");
if (c.dataset.panelPos=="left") { left_col.push(c); }
else if(c.dataset.panelPos=="right") { right_col.push(c); }
c.style.width=newSize[0]+"px";
c.style.height=newSize[1]+"px";
if(!c.openwebrxPanelTransparent) c.style.margin=panel_margin.toString()+"px";
else c.style.marginLeft=panel_margin.toString()+"px";
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c.openwebrxPanelWidth=parseInt(newSize[0]);
c.openwebrxPanelHeight=parseInt(newSize[1]);
}
}
y=hoffset; //was y=0 before hoffset
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while(left_col.length>0)
{
p=pop_bottommost_panel(left_col);
p.style.left="0px";
p.style.bottom=y.toString()+"px";
p.style.visibility="visible";
y+=p.openwebrxPanelHeight+((p.openwebrxPanelTransparent)?0:3)*panel_margin;
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}
y=hoffset;
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while(right_col.length>0)
{
p=pop_bottommost_panel(right_col);
p.style.right=(e("webrx-canvas-container").offsetWidth-e("webrx-canvas-container").clientWidth).toString()+"px"; //get scrollbar width
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p.style.bottom=y.toString()+"px";
p.style.visibility="visible";
y+=p.openwebrxPanelHeight+((p.openwebrxPanelTransparent)?0:3)*panel_margin;
}
}
function progressbar_set(obj,val,text,over)
{
if (val<0.05) val=0;
if (val>1) val=1;
var innerBar=null;
var innerText=null;
for(var i=0;i<obj.children.length;i++)
{
if(obj.children[i].className=="openwebrx-progressbar-text") innerText=obj.children[i];
else if(obj.children[i].className=="openwebrx-progressbar-bar") innerBar=obj.children[i];
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}
if(innerBar==null) return;
//.h: function animate(object,style_name,unit,from,to,accel,time_ms,fps,to_exec)
animate(innerBar,"width","px",innerBar.clientWidth,val*obj.clientWidth,0.7,700,60);
//innerBar.style.width=(val*100).toFixed(0)+"%";
innerBar.style.backgroundColor=(over)?"#ff6262":"#00aba6";
if(innerText==null) return;
innerText.innerHTML=text;
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}