openwebrx-clone/htdocs/openwebrx.js

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/*
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>
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Copyright (c) 2019-2021 by Jakob Ketterl <dd5jfk@darc.de>
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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/>.
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"""
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*/
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is_firefox = navigator.userAgent.indexOf("Firefox") >= 0;
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var bandwidth;
var center_freq;
var fft_size;
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var fft_compression = "none";
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var fft_codec;
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var waterfall_setup_done = 0;
var secondary_fft_size;
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function updateVolume() {
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audioEngine.setVolume(parseFloat($("#openwebrx-panel-volume").val()) / 100);
}
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function toggleMute() {
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var $muteButton = $('.openwebrx-mute-button');
var $volumePanel = $('#openwebrx-panel-volume');
if ($muteButton.hasClass('muted')) {
$muteButton.removeClass('muted');
$volumePanel.prop('disabled', false).val(volumeBeforeMute);
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} else {
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$muteButton.addClass('muted');
volumeBeforeMute = $volumePanel.val();
$volumePanel.prop('disabled', true).val(0);
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}
updateVolume();
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}
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function zoomInOneStep() {
zoom_set(zoom_level + 1);
}
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function zoomOutOneStep() {
zoom_set(zoom_level - 1);
}
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function zoomInTotal() {
zoom_set(zoom_levels.length - 1);
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}
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function zoomOutTotal() {
zoom_set(0);
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}
var waterfall_min_level;
var waterfall_max_level;
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var waterfall_min_level_default;
var waterfall_max_level_default;
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var waterfall_colors = buildWaterfallColors(['#000', '#FFF']);
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var waterfall_auto_level_margin;
function buildWaterfallColors(input) {
return chroma.scale(input).colors(256, 'rgb')
}
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function updateWaterfallColors(which) {
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var $wfmax = $("#openwebrx-waterfall-color-max");
var $wfmin = $("#openwebrx-waterfall-color-min");
waterfall_max_level = parseInt($wfmax.val());
waterfall_min_level = parseInt($wfmin.val());
if (waterfall_min_level >= waterfall_max_level) {
if (!which) {
waterfall_min_level = waterfall_max_level -1;
} else {
waterfall_max_level = waterfall_min_level + 1;
}
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}
updateWaterfallSliders();
}
function updateWaterfallSliders() {
$('#openwebrx-waterfall-color-max')
.val(waterfall_max_level)
.attr('title', 'Waterfall maximum level (' + Math.round(waterfall_max_level) + ' dB)');
$('#openwebrx-waterfall-color-min')
.val(waterfall_min_level)
.attr('title', 'Waterfall minimum level (' + Math.round(waterfall_min_level) + ' dB)');
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}
function waterfallColorsDefault() {
waterfall_min_level = waterfall_min_level_default;
waterfall_max_level = waterfall_max_level_default;
updateWaterfallSliders();
waterfallColorsContinuousReset();
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}
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function waterfallColorsAuto(levels) {
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var min_level = levels.min - waterfall_auto_level_margin.min;
var max_level = levels.max + waterfall_auto_level_margin.max;
max_level = Math.max(min_level + (waterfall_auto_level_margin.min_range || 0), max_level);
waterfall_min_level = min_level;
waterfall_max_level = max_level;
updateWaterfallSliders();
}
var waterfall_continuous = {
min: -150,
max: 0
};
function waterfallColorsContinuousReset() {
waterfall_continuous.min = waterfall_min_level;
waterfall_continuous.max = waterfall_max_level;
}
function waterfallColorsContinuous(levels) {
if (levels.max > waterfall_continuous.max + 1) {
waterfall_continuous.max += 1;
} else if (levels.max < waterfall_continuous.max - 1) {
waterfall_continuous.max -= .1;
}
if (levels.min < waterfall_continuous.min - 1) {
waterfall_continuous.min -= 1;
} else if (levels.min > waterfall_continuous.min + 1) {
waterfall_continuous.min += .1;
}
waterfallColorsAuto(waterfall_continuous);
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}
function setSmeterRelativeValue(value) {
if (value < 0) value = 0;
if (value > 1.0) value = 1.0;
var $meter = $("#openwebrx-smeter");
var $bar = $meter.find(".openwebrx-smeter-bar");
$bar.css({transform: 'translate(' + ((value - 1) * 100) + '%) translateZ(0)'});
if (value > 0.9) {
// red
$bar.css({background: 'linear-gradient(to top, #ff5939 , #961700)'});
} else if (value > 0.7) {
// yellow
$bar.css({background: 'linear-gradient(to top, #fff720 , #a49f00)'});
} else {
// red
$bar.css({background: 'linear-gradient(to top, #22ff2f , #008908)'});
}
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}
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function setSquelchSliderBackground(val) {
var $slider = $('#openwebrx-panel-receiver .openwebrx-squelch-slider');
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var min = Number($slider.attr('min'));
var max = Number($slider.attr('max'));
var sliderPosition = $slider.val();
var relative = (val - min) / (max - min);
// use a brighter color when squelch is open
var color = val >= sliderPosition ? '#22ff2f' : '#008908';
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// we don't use the gradient, but separate the colors discretely using css tricks
var style = 'linear-gradient(90deg, ' + color + ', ' + color + ' ' + relative * 100 + '%, #B6B6B6 ' + relative * 100 + '%)';
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$slider.css('--track-background', style);
}
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function getLogSmeterValue(value) {
return 10 * Math.log10(value);
}
function setSmeterAbsoluteValue(value) //the value that comes from `csdr squelch_and_smeter_cc`
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{
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var logValue = getLogSmeterValue(value);
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setSquelchSliderBackground(logValue);
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var lowLevel = waterfall_min_level - 20;
var highLevel = waterfall_max_level + 20;
var percent = (logValue - lowLevel) / (highLevel - lowLevel);
setSmeterRelativeValue(percent);
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$("#openwebrx-smeter-db").html(logValue.toFixed(1) + " dB");
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}
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function typeInAnimation(element, timeout, what, onFinish) {
if (!what) {
onFinish();
return;
}
element.innerHTML += what[0];
window.setTimeout(function () {
typeInAnimation(element, timeout, what.substring(1), onFinish);
}, timeout);
}
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// ========================================================
// ================ DEMODULATOR ROUTINES ================
// ========================================================
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function getDemodulators() {
return [
$('#openwebrx-panel-receiver').demodulatorPanel().getDemodulator()
].filter(function(d) {
return !!d;
});
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}
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function mkenvelopes(visible_range) //called from mkscale
{
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var demodulators = getDemodulators();
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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);
}
if (demodulators.length) {
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var bandpass = demodulators[0].getBandpass();
secondary_demod_waterfall_set_zoom(bandpass.low_cut, bandpass.high_cut);
}
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}
function waterfallWidth() {
return $('body').width();
}
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// ========================================================
// =================== SCALE ROUTINES ===================
// ========================================================
var scale_ctx;
var scale_canvas;
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function scale_setup() {
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scale_canvas = $("#openwebrx-scale-canvas")[0];
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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();
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var frequency_container = $("#openwebrx-frequency-container");
frequency_container.on("mousemove", frequency_container_mousemove, false);
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}
var scale_canvas_drag_params = {
mouse_down: false,
drag: false,
start_x: 0,
key_modifiers: {shiftKey: false, altKey: false, ctrlKey: false}
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};
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function scale_canvas_mousedown(evt) {
scale_canvas_drag_params.mouse_down = true;
scale_canvas_drag_params.drag = false;
scale_canvas_drag_params.start_x = evt.pageX;
scale_canvas_drag_params.key_modifiers.shiftKey = evt.shiftKey;
scale_canvas_drag_params.key_modifiers.altKey = evt.altKey;
scale_canvas_drag_params.key_modifiers.ctrlKey = evt.ctrlKey;
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evt.preventDefault();
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}
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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 / waterfallWidth())) - center_freq;
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}
function scale_canvas_mousemove(evt) {
var event_handled = false;
var i;
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var demodulators = getDemodulators();
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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 (i = 0; i < demodulators.length; i++) event_handled |= demodulators[i].envelope.drag_start(evt.pageX, scale_canvas_drag_params.key_modifiers);
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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 (i = 0; i < demodulators.length; i++) event_handled |= demodulators[i].envelope.drag_move(evt.pageX);
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if (!event_handled) demodulators[0].set_offset_frequency(scale_offset_freq_from_px(evt.pageX));
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}
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}
function frequency_container_mousemove(evt) {
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var frequency = center_freq + scale_offset_freq_from_px(evt.pageX);
$('#openwebrx-panel-receiver').demodulatorPanel().setMouseFrequency(frequency);
}
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function scale_canvas_end_drag(x) {
scale_canvas.style.cursor = "default";
scale_canvas_drag_params.drag = false;
scale_canvas_drag_params.mouse_down = false;
var event_handled = false;
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var demodulators = getDemodulators();
for (var i = 0; i < demodulators.length; i++) event_handled |= demodulators[i].envelope.drag_end();
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if (!event_handled) demodulators[0].set_offset_frequency(scale_offset_freq_from_px(x));
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}
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function scale_canvas_mouseup(evt) {
scale_canvas_end_drag(evt.pageX);
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}
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function scale_px_from_freq(f, range) {
return Math.round(((f - range.start) / range.bw) * waterfallWidth());
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}
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function get_visible_freq_range() {
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if (!bandwidth) return false;
var fcalc = function (x) {
var canvasWidth = waterfallWidth() * zoom_levels[zoom_level];
return Math.round(((-zoom_offset_px + x) / canvasWidth) * bandwidth) + (center_freq - bandwidth / 2);
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};
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var out = {
start: fcalc(0),
center: fcalc(waterfallWidth() / 2),
end: fcalc(waterfallWidth()),
}
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out.bw = out.end - out.start;
out.hps = out.bw / waterfallWidth();
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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
}
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];
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var scale_min_space_bw_texts = 50;
var scale_min_space_bw_small_markers = 7;
function get_scale_mark_spacing(range) {
var out = {};
var fcalc = function (freq) {
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out.numlarge = (range.bw / freq);
out.large = waterfallWidth() / out.numlarge; //distance between large markers (these have text)
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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 (var i = scale_markers_levels.length - 1; i >= 0; i--) {
var mp = scale_markers_levels[i];
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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;
}
var range;
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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();
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if (!range) return;
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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";
var spacing = get_scale_mark_spacing(range);
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//console.log(spacing);
var marker_hz = Math.ceil(range.start / spacing.smallbw) * spacing.smallbw;
var text_h_pos = 22 + 10 + ((is_firefox) ? 3 : 0);
var text_to_draw = '';
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var ftext = function (f) {
text_to_draw = format_frequency(spacing.params.format, f, spacing.params.pre_divide, spacing.params.decimals);
};
var last_large;
var x;
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while ((x = scale_px_from_freq(marker_hz, range)) <= window.innerWidth) {
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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);
}
}
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);
}
}
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;
x = scale_px_from_freq(f, range);
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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);
}
}
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function resize_scale() {
var ratio = window.devicePixelRatio || 1;
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var w = window.innerWidth;
var h = 47;
scale_canvas.style.width = w + "px";
scale_canvas.style.height = h + "px";
w *= ratio;
h *= ratio;
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scale_canvas.width = w;
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scale_canvas.height = h;
scale_ctx.scale(ratio, ratio);
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mkscale();
bookmarks.position();
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}
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function canvas_get_freq_offset(relativeX) {
var rel = (relativeX / canvases[0].clientWidth);
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return Math.round((bandwidth * rel) - (bandwidth / 2));
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}
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function canvas_get_frequency(relativeX) {
return center_freq + canvas_get_freq_offset(relativeX);
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}
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function format_frequency(format, freq_hz, pre_divide, decimals) {
var out = format.replace("{x}", (freq_hz / pre_divide).toFixed(decimals));
var at = out.indexOf(".") + 4;
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while (decimals > 3) {
out = out.substr(0, at) + "," + out.substr(at);
at += 4;
decimals -= 3;
}
return out;
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}
var canvas_drag = false;
var canvas_drag_min_delta = 1;
var canvas_mouse_down = false;
var canvas_drag_last_x;
var canvas_drag_last_y;
var canvas_drag_start_x;
var canvas_drag_start_y;
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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
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}
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function canvas_mousemove(evt) {
if (!waterfall_setup_done) return;
var relativeX = get_relative_x(evt);
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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 dpx = range.hps * deltaX;
if (
!(zoom_center_rel + dpx > (bandwidth / 2 - waterfallWidth() * (1 - zoom_center_where) * range.hps)) &&
!(zoom_center_rel + dpx < -bandwidth / 2 + waterfallWidth() * zoom_center_where * range.hps)
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) {
zoom_center_rel += dpx;
}
resize_canvases(false);
canvas_drag_last_x = evt.pageX;
canvas_drag_last_y = evt.pageY;
mkscale();
bookmarks.position();
}
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} else {
$('#openwebrx-panel-receiver').demodulatorPanel().setMouseFrequency(canvas_get_frequency(relativeX));
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}
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}
function canvas_container_mouseleave() {
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canvas_end_drag();
}
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function canvas_mouseup(evt) {
if (!waterfall_setup_done) return;
var relativeX = get_relative_x(evt);
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if (!canvas_drag) {
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$('#openwebrx-panel-receiver').demodulatorPanel().getDemodulator().set_offset_frequency(canvas_get_freq_offset(relativeX));
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}
else {
canvas_end_drag();
}
canvas_mouse_down = false;
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}
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function canvas_end_drag() {
canvas_container.style.cursor = "crosshair";
canvas_mouse_down = false;
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}
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function zoom_center_where_calc(screenposX) {
return screenposX / waterfallWidth();
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}
function get_relative_x(evt) {
var relativeX = evt.offsetX || evt.layerX;
if ($(evt.target).closest(canvas_container).length) return relativeX;
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// compensate for the frequency scale, since that is not resized by the browser.
var relatives = $(evt.target).closest('#openwebrx-frequency-container').map(function(){
return evt.pageX - this.offsetLeft;
});
if (relatives.length) relativeX = relatives[0];
return relativeX - zoom_offset_px;
}
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function canvas_mousewheel(evt) {
if (!waterfall_setup_done) return;
var relativeX = get_relative_x(evt);
var dir = (evt.deltaY / Math.abs(evt.deltaY)) > 0;
zoom_step(dir, relativeX, zoom_center_where_calc(evt.pageX));
evt.preventDefault();
}
var zoom_max_level_hps = 33; //Hz/pixel
var zoom_levels_count = 14;
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function get_zoom_coeff_from_hps(hps) {
var shown_bw = (window.innerWidth * hps);
return bandwidth / shown_bw;
}
var zoom_levels = [1];
var zoom_level = 0;
var zoom_offset_px = 0;
var zoom_center_rel = 0;
var zoom_center_where = 0;
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var smeter_level = 0;
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function mkzoomlevels() {
zoom_levels = [1];
var maxc = get_zoom_coeff_from_hps(zoom_max_level_hps);
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if (maxc < 1) return;
// logarithmic interpolation
var zoom_ratio = Math.pow(maxc, 1 / zoom_levels_count);
for (var i = 1; i < zoom_levels_count; i++)
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zoom_levels.push(Math.pow(zoom_ratio, i));
}
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;
//console.log(zoom_center_where, zoom_center_rel, where);
resize_canvases(true);
mkscale();
bookmarks.position();
}
function zoom_set(level) {
if (!(level >= 0 && level <= zoom_levels.length - 1)) return;
level = parseInt(level);
zoom_level = level;
//zoom_center_rel=canvas_get_freq_offset(-canvases[0].offsetLeft+waterfallWidth()/2); //zoom to screen center instead of demod envelope
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zoom_center_rel = $('#openwebrx-panel-receiver').demodulatorPanel().getDemodulator().get_offset_frequency();
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zoom_center_where = 0.5 + (zoom_center_rel / bandwidth); //this is a kind of hack
resize_canvases(true);
mkscale();
bookmarks.position();
}
function zoom_calc() {
var winsize = waterfallWidth();
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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;
}
var networkSpeedMeasurement;
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var currentprofile = {
toString: function() {
return this['sdr_id'] + '|' + this['profile_id'];
}
};
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var COMPRESS_FFT_PAD_N = 10; //should be the same as in csdr.c
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function on_ws_recv(evt) {
if (typeof evt.data === 'string') {
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// text messages
networkSpeedMeasurement.add(evt.data.length);
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if (evt.data.substr(0, 16) === "CLIENT DE SERVER") {
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params = Object.fromEntries(
evt.data.slice(17).split(' ').map(function(param) {
var args = param.split('=');
return [args[0], args.slice(1).join('=')]
})
);
var versionInfo = 'Unknown server';
if (params.server && params.server === 'openwebrx' && params.version) {
versionInfo = 'OpenWebRX version: ' + params.version;
}
divlog('Server acknowledged WebSocket connection, ' + versionInfo);
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} else {
try {
var json = JSON.parse(evt.data);
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switch (json.type) {
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case "config":
var config = json['value'];
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if ('waterfall_colors' in config)
waterfall_colors = buildWaterfallColors(config['waterfall_colors']);
if ('waterfall_min_level' in config)
waterfall_min_level_default = config['waterfall_min_level'];
if ('waterfall_max_level' in config)
waterfall_max_level_default = config['waterfall_max_level'];
if ('waterfall_auto_level_margin' in config)
waterfall_auto_level_margin = config['waterfall_auto_level_margin'];
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waterfallColorsDefault();
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var initial_demodulator_params = {};
if ('start_mod' in config)
initial_demodulator_params['mod'] = config['start_mod'];
if ('start_offset_freq' in config)
initial_demodulator_params['offset_frequency'] = config['start_offset_freq'];
if ('initial_squelch_level' in config)
initial_demodulator_params['squelch_level'] = Number.isInteger(config['initial_squelch_level']) ? config['initial_squelch_level'] : -150;
if ('samp_rate' in config)
bandwidth = config['samp_rate'];
if ('center_freq' in config)
center_freq = config['center_freq'];
if ('fft_size' in config)
fft_size = config['fft_size'];
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if ('audio_compression' in config) {
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var audio_compression = config['audio_compression'];
audioEngine.setCompression(audio_compression);
divlog("Audio stream is " + ((audio_compression === "adpcm") ? "compressed" : "uncompressed") + ".");
}
if ('fft_compression' in config) {
fft_compression = config['fft_compression'];
divlog("FFT stream is " + ((fft_compression === "adpcm") ? "compressed" : "uncompressed") + ".");
}
if ('max_clients' in config)
$('#openwebrx-bar-clients').progressbar().setMaxClients(config['max_clients']);
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waterfall_init();
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var demodulatorPanel = $('#openwebrx-panel-receiver').demodulatorPanel();
demodulatorPanel.setCenterFrequency(center_freq);
demodulatorPanel.setInitialParams(initial_demodulator_params);
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if ('squelch_auto_margin' in config)
demodulatorPanel.setSquelchMargin(config['squelch_auto_margin']);
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bookmarks.loadLocalBookmarks();
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if ('sdr_id' in config || 'profile_id' in config) {
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currentprofile['sdr_id'] = config['sdr_id'] || currentprofile['sdr_id'];
currentprofile['profile_id'] = config['profile_id'] || currentprofile['profile_id'];
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$('#openwebrx-sdr-profiles-listbox').val(currentprofile.toString());
waterfall_clear();
}
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if ('frequency_display_precision' in config)
$('#openwebrx-panel-receiver').demodulatorPanel().setFrequencyPrecision(config['frequency_display_precision']);
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break;
case "secondary_config":
var s = json['value'];
window.secondary_fft_size = s['secondary_fft_size'];
window.secondary_bw = s['secondary_bw'];
window.if_samp_rate = s['if_samp_rate'];
secondary_demod_init_canvases();
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break;
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case "receiver_details":
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$('.webrx-top-container').header().setDetails(json['value']);
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break;
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case "smeter":
smeter_level = json['value'];
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setSmeterAbsoluteValue(smeter_level);
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break;
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case "cpuusage":
$('#openwebrx-bar-server-cpu').progressbar().setUsage(json['value']);
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break;
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case "clients":
$('#openwebrx-bar-clients').progressbar().setClients(json['value']);
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break;
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case "profiles":
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var listbox = $("#openwebrx-sdr-profiles-listbox");
listbox.html(json['value'].map(function (profile) {
return '<option value="' + profile['id'] + '">' + profile['name'] + "</option>";
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}).join(""));
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$('#openwebrx-sdr-profiles-listbox').val(currentprofile.toString());
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break;
case "features":
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Modes.setFeatures(json['value']);
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break;
case "metadata":
$('.openwebrx-meta-panel').metaPanel().each(function(){
this.update(json['value']);
});
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break;
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case "js8_message":
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$("#openwebrx-panel-js8-message").js8().pushMessage(json['value']);
break;
case "wsjt_message":
$("#openwebrx-panel-wsjt-message").wsjtMessagePanel().pushMessage(json['value']);
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break;
case "dial_frequencies":
var as_bookmarks = json['value'].map(function (d) {
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return {
name: d['mode'].toUpperCase(),
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modulation: d['mode'],
frequency: d['frequency']
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};
});
bookmarks.replace_bookmarks(as_bookmarks, 'dial_frequencies');
break;
case "aprs_data":
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$('#openwebrx-panel-packet-message').packetMessagePanel().pushMessage(json['value']);
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break;
case "bookmarks":
bookmarks.replace_bookmarks(json['value'], "server");
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break;
case "sdr_error":
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divlog(json['value'], true);
var $overlay = $('#openwebrx-error-overlay');
$overlay.find('.errormessage').text(json['value']);
$overlay.show();
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break;
case 'secondary_demod':
secondary_demod_push_data(json['value']);
break;
case 'log_message':
divlog(json['value'], true);
break;
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case 'pocsag_data':
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$('#openwebrx-panel-pocsag-message').pocsagMessagePanel().pushMessage(json['value']);
break;
case 'backoff':
divlog("Server is currently busy: " + json['reason'], true);
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var $overlay = $('#openwebrx-error-overlay');
$overlay.find('.errormessage').text(json['reason']);
$overlay.show();
// set a higher reconnection timeout right away to avoid additional load
reconnect_timeout = 16000;
break;
case 'modes':
Modes.setModes(json['value']);
break;
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default:
console.warn('received message of unknown type: ' + json['type']);
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}
} catch (e) {
// don't lose exception
console.error(e)
}
}
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} else if (evt.data instanceof ArrayBuffer) {
// binary messages
networkSpeedMeasurement.add(evt.data.byteLength);
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var type = new Uint8Array(evt.data, 0, 1)[0];
var data = evt.data.slice(1);
var waterfall_i16;
var waterfall_f32;
var i;
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switch (type) {
case 1:
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// FFT data
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if (fft_compression === "none") {
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waterfall_add(new Float32Array(data));
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} else if (fft_compression === "adpcm") {
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fft_codec.reset();
waterfall_i16 = fft_codec.decode(new Uint8Array(data));
waterfall_f32 = new Float32Array(waterfall_i16.length - COMPRESS_FFT_PAD_N);
for (i = 0; i < waterfall_i16.length; i++) waterfall_f32[i] = waterfall_i16[i + COMPRESS_FFT_PAD_N] / 100;
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waterfall_add(waterfall_f32);
}
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break;
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case 2:
// audio data
audioEngine.pushAudio(data);
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break;
case 3:
// secondary FFT
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if (fft_compression === "none") {
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secondary_demod_waterfall_add(new Float32Array(data));
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} else if (fft_compression === "adpcm") {
fft_codec.reset();
waterfall_i16 = fft_codec.decode(new Uint8Array(data));
waterfall_f32 = new Float32Array(waterfall_i16.length - COMPRESS_FFT_PAD_N);
for (i = 0; i < waterfall_i16.length; i++) waterfall_f32[i] = waterfall_i16[i + COMPRESS_FFT_PAD_N] / 100;
secondary_demod_waterfall_add(waterfall_f32);
}
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break;
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case 4:
// hd audio data
audioEngine.pushHdAudio(data);
break;
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default:
console.warn('unknown type of binary message: ' + type)
}
}
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}
var waterfall_measure_minmax_now = false;
var waterfall_measure_minmax_continuous = false;
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function waterfall_measure_minmax_do(what) {
// this is based on an oversampling factor of about 1,25
var ignored = .1 * what.length;
var data = what.slice(ignored, -ignored);
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return {
min: Math.min.apply(Math, data),
max: Math.max.apply(Math, data)
};
}
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function on_ws_opened() {
$('#openwebrx-error-overlay').hide();
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ws.send("SERVER DE CLIENT client=openwebrx.js type=receiver");
divlog("WebSocket opened to " + ws.url);
if (!networkSpeedMeasurement) {
networkSpeedMeasurement = new Measurement();
networkSpeedMeasurement.report(60000, 1000, function(rate){
$('#openwebrx-bar-network-speed').progressbar().setSpeed(rate);
});
} else {
networkSpeedMeasurement.reset();
}
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reconnect_timeout = false;
ws.send(JSON.stringify({
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"type": "connectionproperties",
"params": {
"output_rate": audioEngine.getOutputRate(),
"hd_output_rate": audioEngine.getHdOutputRate()
}
}));
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}
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var was_error = 0;
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function divlog(what, is_error) {
is_error = !!is_error;
was_error |= is_error;
if (is_error) {
what = "<span class=\"webrx-error\">" + what + "</span>";
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toggle_panel("openwebrx-panel-log", true); //show panel if any error is present
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}
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$('#openwebrx-debugdiv')[0].innerHTML += what + "<br />";
var nano = $('.nano');
nano.nanoScroller();
nano.nanoScroller({scroll: 'bottom'});
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}
var volumeBeforeMute = 100.0;
var mute = false;
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// Optimalise these if audio lags or is choppy:
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var audio_buffer_maximal_length_sec = 1; //actual number of samples are calculated from sample rate
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function onAudioStart(apiType){
divlog('Web Audio API succesfully initialized, using ' + apiType + ' API, sample rate: ' + audioEngine.getSampleRate() + " Hz");
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hideOverlay();
// canvas_container is set after waterfall_init() has been called. we cannot initialize before.
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//if (canvas_container) synchronize_demodulator_init();
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//hide log panel in a second (if user has not hidden it yet)
window.setTimeout(function () {
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toggle_panel("openwebrx-panel-log", !!was_error);
}, 2000);
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//Synchronise volume with slider
updateVolume();
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}
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var reconnect_timeout = false;
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function on_ws_closed() {
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$("#openwebrx-panel-receiver").demodulatorPanel().stopDemodulator();
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if (reconnect_timeout) {
// max value: roundabout 8 and a half minutes
reconnect_timeout = Math.min(reconnect_timeout * 2, 512000);
} else {
// initial value: 1s
reconnect_timeout = 1000;
}
divlog("WebSocket has closed unexpectedly. Attempting to reconnect in " + reconnect_timeout / 1000 + " seconds...", 1);
setTimeout(open_websocket, reconnect_timeout);
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}
function on_ws_error() {
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divlog("WebSocket error.", 1);
}
var ws;
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function open_websocket() {
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var protocol = window.location.protocol.match(/https/) ? 'wss' : 'ws';
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var href = window.location.href;
var index = href.lastIndexOf('/');
if (index > 0) {
href = href.substr(0, index + 1);
}
href = href.split("://")[1];
href = protocol + "://" + href;
if (!href.endsWith('/')) {
href += '/';
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}
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var ws_url = href + "ws/";
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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);
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;
}
function waterfall_mkcolor(db_value, waterfall_colors_arg) {
waterfall_colors_arg = waterfall_colors_arg || waterfall_colors;
var value_percent = (db_value - waterfall_min_level) / (waterfall_max_level - waterfall_min_level);
value_percent = Math.max(0, Math.min(1, value_percent));
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var scaled = value_percent * (waterfall_colors_arg.length - 1);
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var index = Math.floor(scaled);
var remain = scaled - index;
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if (remain === 0) return waterfall_colors_arg[index];
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return color_between(waterfall_colors_arg[index], waterfall_colors_arg[index + 1], remain);}
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function color_between(first, second, percent) {
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return [
first[0] + percent * (second[0] - first[0]),
first[1] + percent * (second[1] - first[1]),
first[2] + percent * (second[2] - first[2])
];
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}
var canvas_context;
var canvases = [];
var canvas_default_height = 200;
var canvas_container;
var canvas_actual_line;
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function add_canvas() {
var 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.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);
canvases.push(new_canvas);
while (canvas_container && canvas_container.clientHeight + canvas_default_height * 2 < canvases.length * canvas_default_height) {
var c = canvases.shift();
if (!c) break;
canvas_container.removeChild(c);
}
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}
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function init_canvas_container() {
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canvas_container = $("#webrx-canvas-container")[0];
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canvas_container.addEventListener("mouseleave", canvas_container_mouseleave, false);
canvas_container.addEventListener("mousemove", canvas_mousemove, false);
canvas_container.addEventListener("mouseup", canvas_mouseup, false);
canvas_container.addEventListener("mousedown", canvas_mousedown, false);
canvas_container.addEventListener("wheel", canvas_mousewheel, false);
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var frequency_container = $("#openwebrx-frequency-container");
frequency_container.on("wheel", canvas_mousewheel, false);
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add_canvas();
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}
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canvas_maxshift = 0;
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function shift_canvases() {
canvases.forEach(function (p) {
p.style.top = (p.openwebrx_top++).toString() + "px";
});
canvas_maxshift++;
}
function resize_canvases(zoom) {
if (typeof zoom === "undefined") zoom = false;
if (!zoom) mkzoomlevels();
zoom_calc();
$('#webrx-canvas-container').css({
width: waterfallWidth() * zoom_levels[zoom_level] + 'px',
left: zoom_offset_px + "px"
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});
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}
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function waterfall_init() {
init_canvas_container();
resize_canvases();
scale_setup();
mkzoomlevels();
waterfall_setup_done = 1;
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}
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function waterfall_add(data) {
if (!waterfall_setup_done) return;
var w = fft_size;
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if (waterfall_measure_minmax_now) {
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var levels = waterfall_measure_minmax_do(data);
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waterfall_measure_minmax_now = false;
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waterfallColorsAuto(levels);
waterfallColorsContinuousReset();
}
if (waterfall_measure_minmax_continuous) {
var level = waterfall_measure_minmax_do(data);
waterfallColorsContinuous(level);
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}
//Add line to waterfall image
var oneline_image = canvas_context.createImageData(w, 1);
for (var x = 0; x < w; x++) {
var color = waterfall_mkcolor(data[x]);
for (i = 0; i < 3; i++) oneline_image.data[x * 4 + i] = color[i];
oneline_image.data[x * 4 + 3] = 255;
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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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}
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function waterfall_clear() {
while (canvases.length) //delete all canvases
{
var x = canvases.shift();
x.parentNode.removeChild(x);
}
add_canvas();
}
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function openwebrx_resize() {
resize_canvases();
resize_scale();
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}
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function initProgressBars() {
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$(".openwebrx-progressbar").each(function(){
var bar = $(this).progressbar();
if ('setSampleRate' in bar) {
bar.setSampleRate(audioEngine.getSampleRate());
}
})
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}
function audioReporter(stats) {
if (typeof(stats.buffersize) !== 'undefined') {
$('#openwebrx-bar-audio-buffer').progressbar().setBuffersize(stats.buffersize);
}
if (typeof(stats.audioByteRate) !== 'undefined') {
$('#openwebrx-bar-audio-speed').progressbar().setSpeed(stats.audioByteRate * 8);
}
if (typeof(stats.audioRate) !== 'undefined') {
$('#openwebrx-bar-audio-output').progressbar().setAudioRate(stats.audioRate);
}
}
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var bookmarks;
var audioEngine;
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function openwebrx_init() {
audioEngine = new AudioEngine(audio_buffer_maximal_length_sec, audioReporter);
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$overlay = $('#openwebrx-autoplay-overlay');
$overlay.on('click', function(){
audioEngine.resume();
});
audioEngine.onStart(onAudioStart);
if (!audioEngine.isAllowed()) {
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$overlay.show();
}
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fft_codec = new ImaAdpcmCodec();
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initProgressBars();
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open_websocket();
secondary_demod_init();
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digimodes_init();
initPanels();
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$('#openwebrx-panel-receiver').demodulatorPanel();
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window.addEventListener("resize", openwebrx_resize);
bookmarks = new BookmarkBar();
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initSliders();
}
function initSliders() {
$('#openwebrx-panel-receiver').on('wheel', 'input[type=range]', function(ev){
var $slider = $(this);
if (!$slider.attr('step')) return;
var val = Number($slider.val());
var step = Number($slider.attr('step'));
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if (ev.originalEvent.deltaY > 0) {
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step *= -1;
}
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$slider.val(val + step);
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$slider.trigger('change');
});
var waterfallAutoButton = $('#openwebrx-waterfall-colors-auto');
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waterfallAutoButton.on('click', function() {
waterfall_measure_minmax_now=true;
}).on('contextmenu', function(){
waterfall_measure_minmax_continuous = !waterfall_measure_minmax_continuous;
waterfallColorsContinuousReset();
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waterfallAutoButton[waterfall_measure_minmax_continuous ? 'addClass' : 'removeClass']('highlighted');
$('#openwebrx-waterfall-color-min, #openwebrx-waterfall-color-max').prop('disabled', waterfall_measure_minmax_continuous);
return false;
});
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}
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function digimodes_init() {
// initialze DMR timeslot muting
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$('.openwebrx-dmr-timeslot-panel').click(function (e) {
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$(e.currentTarget).toggleClass("muted");
update_dmr_timeslot_filtering();
});
$('.openwebrx-meta-panel').metaPanel();
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}
function update_dmr_timeslot_filtering() {
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var filter = $('.openwebrx-dmr-timeslot-panel').map(function (index, el) {
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return (!$(el).hasClass("muted")) << index;
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}).toArray().reduce(function (acc, v) {
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return acc | v;
}, 0);
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$('#openwebrx-panel-receiver').demodulatorPanel().getDemodulator().setDmrFilter(filter);
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}
function hideOverlay() {
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var $overlay = $('#openwebrx-autoplay-overlay');
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$overlay.css('opacity', 0);
$overlay.on('transitionend', function() {
$overlay.hide();
});
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}
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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);
});
};
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// ========================================================
// ======================= PANELS =======================
// ========================================================
function panel_displayed(el){
return !(el.style && el.style.display && el.style.display === 'none')
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}
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function toggle_panel(what, on) {
var item = $('#' + what)[0];
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if (!item) return;
var displayed = panel_displayed(item);
if (typeof on !== "undefined" && displayed === on) {
return;
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}
if (item.openwebrxDisableClick) return;
if (displayed) {
item.movement = 'collapse';
item.style.transform = "perspective(600px) rotateX(90deg)";
item.style.transitionProperty = 'transform';
} else {
item.movement = 'expand';
item.style.display = null;
setTimeout(function(){
item.style.transitionProperty = 'transform';
item.style.transform = 'perspective(600px) rotateX(0deg)';
}, 20);
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}
item.style.transitionDuration = "600ms";
item.style.transitionDelay = "0ms";
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item.openwebrxDisableClick = true;
}
function first_show_panel(panel) {
panel.style.transitionDuration = 0;
panel.style.transitionDelay = 0;
var rotx = (Math.random() > 0.5) ? -90 : 90;
var roty = 0;
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if (Math.random() > 0.5) {
var rottemp = rotx;
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rotx = roty;
roty = rottemp;
}
if (rotx !== 0 && Math.random() > 0.5) rotx = 270;
panel.style.transform = "perspective(600px) rotateX(%1deg) rotateY(%2deg)"
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.replace("%1", rotx.toString()).replace("%2", roty.toString());
window.setTimeout(function () {
panel.style.transitionDuration = "600ms";
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panel.style.transitionDelay = (Math.floor(Math.random() * 500)).toString() + "ms";
panel.style.transform = "perspective(600px) rotateX(0deg) rotateY(0deg)";
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}, 1);
}
function initPanels() {
$('#openwebrx-panels-container').find('.openwebrx-panel').each(function(){
var el = this;
el.openwebrxPanelTransparent = (!!el.dataset.panelTransparent);
el.addEventListener('transitionend', function(ev){
if (ev.target !== el) return;
el.openwebrxDisableClick = false;
el.style.transitionDuration = null;
el.style.transitionDelay = null;
el.style.transitionProperty = null;
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if (el.movement && el.movement === 'collapse') {
el.style.display = 'none';
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}
});
if (panel_displayed(el)) first_show_panel(el);
});
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}
/*
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_____ _ _ _
| __ \(_) (_) | |
| | | |_ __ _ _ _ __ ___ ___ __| | ___ ___
| | | | |/ _` | | '_ ` _ \ / _ \ / _` |/ _ \/ __|
| |__| | | (_| | | | | | | | (_) | (_| | __/\__ \
|_____/|_|\__, |_|_| |_| |_|\___/ \__,_|\___||___/
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__/ |
|___/
*/
var secondary_demod_fft_offset_db = 18; //need to calculate that later
var secondary_demod_canvases_initialized = false;
var secondary_demod_channel_freq = 1000;
var secondary_demod_waiting_for_set = false;
var secondary_demod_low_cut;
var secondary_demod_high_cut;
var secondary_demod_mousedown = false;
var secondary_demod_canvas_width;
var secondary_demod_canvas_left;
var secondary_demod_canvas_container;
var secondary_demod_current_canvas_actual_line;
var secondary_demod_current_canvas_context;
var secondary_demod_current_canvas_index;
var secondary_demod_canvases;
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function secondary_demod_create_canvas() {
var new_canvas = document.createElement("canvas");
new_canvas.width = secondary_fft_size;
new_canvas.height = $(secondary_demod_canvas_container).height();
new_canvas.style.width = $(secondary_demod_canvas_container).width() + "px";
new_canvas.style.height = $(secondary_demod_canvas_container).height() + "px";
secondary_demod_current_canvas_actual_line = new_canvas.height - 1;
$(secondary_demod_canvas_container).children().last().before(new_canvas);
return new_canvas;
}
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function secondary_demod_remove_canvases() {
$(secondary_demod_canvas_container).children("canvas").remove();
}
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function secondary_demod_init_canvases() {
secondary_demod_remove_canvases();
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secondary_demod_canvases = [];
secondary_demod_canvases.push(secondary_demod_create_canvas());
secondary_demod_canvases.push(secondary_demod_create_canvas());
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secondary_demod_canvases[0].openwebrx_top = -$(secondary_demod_canvas_container).height();
secondary_demod_canvases[1].openwebrx_top = 0;
secondary_demod_canvases_update_top();
secondary_demod_current_canvas_context = secondary_demod_canvases[0].getContext("2d");
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secondary_demod_current_canvas_actual_line = $(secondary_demod_canvas_container).height() - 1;
secondary_demod_current_canvas_index = 0;
secondary_demod_canvases_initialized = true;
mkscale(); //so that the secondary waterfall zoom level will be initialized
}
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function secondary_demod_canvases_update_top() {
for (var i = 0; i < 2; i++) secondary_demod_canvases[i].style.top = secondary_demod_canvases[i].openwebrx_top + "px";
}
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function secondary_demod_swap_canvases() {
secondary_demod_canvases[0 + !secondary_demod_current_canvas_index].openwebrx_top -= $(secondary_demod_canvas_container).height() * 2;
secondary_demod_current_canvas_index = 0 + !secondary_demod_current_canvas_index;
secondary_demod_current_canvas_context = secondary_demod_canvases[secondary_demod_current_canvas_index].getContext("2d");
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secondary_demod_current_canvas_actual_line = $(secondary_demod_canvas_container).height() - 1;
}
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function secondary_demod_init() {
secondary_demod_canvas_container = $("#openwebrx-digimode-canvas-container")[0];
$(secondary_demod_canvas_container)
.mousemove(secondary_demod_canvas_container_mousemove)
.mouseup(secondary_demod_canvas_container_mouseup)
.mousedown(secondary_demod_canvas_container_mousedown)
.mouseenter(secondary_demod_canvas_container_mousein)
.mouseleave(secondary_demod_canvas_container_mouseleave);
$('#openwebrx-panel-wsjt-message').wsjtMessagePanel();
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$('#openwebrx-panel-packet-message').packetMessagePanel();
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$('#openwebrx-panel-pocsag-message').pocsagMessagePanel();
$('#openwebrx-panel-js8-message').js8();
}
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function secondary_demod_push_data(x) {
x = Array.from(x).filter(function (y) {
var c = y.charCodeAt(0);
return (c === 10 || (c >= 32 && c <= 126));
}).map(function (y) {
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if (y === "&")
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return "&amp;";
if (y === "<") return "&lt;";
if (y === ">") return "&gt;";
if (y === " ") return "&nbsp;";
return y;
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}).map(function (y) {
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if (y === "\n")
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return "<br />";
return "<span class=\"part\">" + y + "</span>";
}).join("");
$("#openwebrx-cursor-blink").before(x);
}
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function secondary_demod_waterfall_add(data) {
var w = secondary_fft_size;
//Add line to waterfall image
var oneline_image = secondary_demod_current_canvas_context.createImageData(w, 1);
for (var x = 0; x < w; x++) {
var color = waterfall_mkcolor(data[x] + secondary_demod_fft_offset_db);
for (var i = 0; i < 3; i++) oneline_image.data[x * 4 + i] = color[i];
oneline_image.data[x * 4 + 3] = 255;
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}
//Draw image
secondary_demod_current_canvas_context.putImageData(oneline_image, 0, secondary_demod_current_canvas_actual_line--);
secondary_demod_canvases.map(function (x) {
x.openwebrx_top += 1;
})
;
secondary_demod_canvases_update_top();
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if (secondary_demod_current_canvas_actual_line < 0) secondary_demod_swap_canvases();
}
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function secondary_demod_update_marker() {
var width = Math.max((secondary_bw / if_samp_rate) * secondary_demod_canvas_width, 5);
var center_at = ((secondary_demod_channel_freq - secondary_demod_low_cut) / if_samp_rate) * secondary_demod_canvas_width;
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var left = center_at - width / 2;
$("#openwebrx-digimode-select-channel").width(width).css("left", left + "px")
}
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function secondary_demod_update_channel_freq_from_event(evt) {
if (typeof evt !== "undefined") {
var relativeX = (evt.offsetX) ? evt.offsetX : evt.layerX;
secondary_demod_channel_freq = secondary_demod_low_cut +
(relativeX / $(secondary_demod_canvas_container).width()) * (secondary_demod_high_cut - secondary_demod_low_cut);
}
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if (!secondary_demod_waiting_for_set) {
secondary_demod_waiting_for_set = true;
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window.setTimeout(function () {
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$('#openwebrx-panel-receiver').demodulatorPanel().getDemodulator().set_secondary_offset_freq(Math.floor(secondary_demod_channel_freq));
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secondary_demod_waiting_for_set = false;
},
50
)
;
}
secondary_demod_update_marker();
}
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function secondary_demod_canvas_container_mousein() {
$("#openwebrx-digimode-select-channel").css("opacity", "0.7"); //.css("border-width", "1px");
}
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function secondary_demod_canvas_container_mouseleave() {
$("#openwebrx-digimode-select-channel").css("opacity", "0");
}
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function secondary_demod_canvas_container_mousemove(evt) {
if (secondary_demod_mousedown) secondary_demod_update_channel_freq_from_event(evt);
}
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function secondary_demod_canvas_container_mousedown(evt) {
if (evt.which === 1) secondary_demod_mousedown = true;
}
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function secondary_demod_canvas_container_mouseup(evt) {
if (evt.which === 1) secondary_demod_mousedown = false;
secondary_demod_update_channel_freq_from_event(evt);
}
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function secondary_demod_waterfall_set_zoom(low_cut, high_cut) {
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if (!secondary_demod_canvases_initialized) return;
secondary_demod_low_cut = low_cut;
secondary_demod_high_cut = high_cut;
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var shown_bw = high_cut - low_cut;
secondary_demod_canvas_width = $(secondary_demod_canvas_container).width() * (if_samp_rate) / shown_bw;
secondary_demod_canvas_left = (-secondary_demod_canvas_width / 2) - (low_cut / if_samp_rate) * secondary_demod_canvas_width;
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secondary_demod_canvases.map(function (x) {
$(x).css({
left: secondary_demod_canvas_left + "px",
width: secondary_demod_canvas_width + "px"
});
});
secondary_demod_update_channel_freq_from_event();
}
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function sdr_profile_changed() {
var value = $('#openwebrx-sdr-profiles-listbox').val();
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ws.send(JSON.stringify({type: "selectprofile", params: {profile: value}}));
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}