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/*****************************************************************************
# #
# KVMD - The main Pi-KVM daemon. #
# #
# Copyright (C) 2018 Maxim Devaev <[email protected]> #
# #
# This program is free software: you can redistribute it and/or modify #
# it under the terms of the GNU General Public License as published by #
# the Free Software Foundation, either version 3 of the License, or #
# (at your option) any later version. #
# #
# This program is distributed in the hope that it will be useful, #
# but WITHOUT ANY WARRANTY; without even the implied warranty of #
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
# GNU General Public License for more details. #
# #
# You should have received a copy of the GNU General Public License #
# along with this program. If not, see <https://www.gnu.org/licenses/>. #
# #
*****************************************************************************/
function Streamer() {
var self = this;
/************************************************************************/
var __resolution = {width: 640, height: 480};
var __size_factor = 1;
var __client_key = tools.makeId();
var __client_id = "";
var __client_fps = -1;
var __prev = false;
var __init__ = function() {
$("stream-led").title = "Stream inactive";
$("stream-quality-slider").min = 5;
$("stream-quality-slider").max = 100;
$("stream-quality-slider").step = 5;
$("stream-quality-slider").value = 80;
tools.setOnUpSlider($("stream-quality-slider"), 1000, __updateQualityValue, (value) => __sendParam("quality", value));
$("stream-desired-fps-slider").min = 0;
$("stream-desired-fps-slider").max = 30;
$("stream-desired-fps-slider").step = 1;
$("stream-desired-fps-slider").value = 0;
tools.setOnUpSlider($("stream-desired-fps-slider"), 1000, __updateDesiredFpsValue, (value) => __sendParam("desired_fps", value));
$("stream-size-slider").min = 20;
$("stream-size-slider").max = 200;
$("stream-size-slider").step = 5;
$("stream-size-slider").value = 100;
$("stream-size-slider").oninput = () => __resize();
$("stream-size-slider").onchange = () => __resize();
tools.setOnClick($("stream-screenshot-button"), __clickScreenshotButton);
tools.setOnClick($("stream-reset-button"), __clickResetButton);
};
/************************************************************************/
self.setState = function(state) {
if (state && state.state) {
let encoder = state.state.encoder;
let source = state.state.source;
let stream = state.state.stream;
if (!__prev) {
$("stream-quality-slider").activated = false;
$("stream-desired-fps-slider").activated = false;
}
if (!$("stream-quality-slider").activated) {
wm.switchDisabled($("stream-quality-slider"), false);
if ($("stream-quality-slider").value !== encoder.quality) {
$("stream-quality-slider").value = encoder.quality;
__updateQualityValue(encoder.quality);
}
}
if (!$("stream-desired-fps-slider").activated) {
wm.switchDisabled($("stream-desired-fps-slider"), false);
if ($("stream-desired-fps-slider").value !== source.desired_fps) {
$("stream-desired-fps-slider").value = source.desired_fps;
__updateDesiredFpsValue(source.desired_fps);
}
}
if (__resolution.width !== source.resolution.width || __resolution.height !== source.resolution.height) {
__resolution = source.resolution;
if ($("stream-auto-resize-checkbox").checked) {
__adjustSizeFactor();
} else {
__applySizeFactor();
}
}
let stream_client = tools.getCookie("stream_client");
if (!__client_id && stream_client && stream_client.startsWith(__client_key + "/")) {
tools.info("Stream: found acceptable stream_client cookie:", stream_client);
__client_id = stream_client.slice(stream_client.indexOf("/") + 1);
}
if (stream.clients_stat.hasOwnProperty(__client_id)) {
__client_fps = stream.clients_stat[__client_id].fps;
} else {
__clearState();
}
if (!__prev) {
let path = "/streamer/stream?key=" + __client_key;
if (tools.browser.is_safari || tools.browser.is_ios) {
// uStreamer fix for WebKit
tools.info("Stream: using dual_final_frames=1 to fix WebKit MJPG bugs");
path += "&dual_final_frames=1";
} else if (tools.browser.is_chrome || tools.browser.is_blink) {
// uStreamer fix for Blink https://bugs.chromium.org/p/chromium/issues/detail?id=527446
tools.info("Stream: using advance_headers=1 to fix Blink MJPG bugs");
path += "&advance_headers=1";
}
$("stream-image").src = path;
$("stream-image").className = "stream-image-active";
$("stream-box").classList.remove("stream-box-inactive");
$("stream-led").className = "led-green";
$("stream-led").title = "Stream is active";
wm.switchDisabled($("stream-screenshot-button"), false);
wm.switchDisabled($("stream-reset-button"), false);
tools.info("Stream: acquired");
__prev = true;
}
__updateStreamHeader(true);
} else {
__clearState();
}
};
var __clearState = function() {
tools.info("Stream: refreshing ...");
$("stream-image").className = "stream-image-inactive";
$("stream-box").classList.add("stream-box-inactive");
$("stream-led").className = "led-gray";
$("stream-led").title = "Stream inactive";
wm.switchDisabled($("stream-screenshot-button"), true);
wm.switchDisabled($("stream-reset-button"), true);
wm.switchDisabled($("stream-quality-slider"), true);
wm.switchDisabled($("stream-desired-fps-slider"), true);
__client_key = tools.makeId();
__client_id = "";
__client_fps = -1;
__prev = false;
__updateStreamHeader(false);
};
var __updateQualityValue = function(value) {
$("stream-quality-value").innerHTML = value + "%";
};
var __updateDesiredFpsValue = function(value) {
$("stream-desired-fps-value").innerHTML = (value === 0 ? "Unlimited" : value);
};
var __updateStreamHeader = function(online) {
let el_grab = document.querySelector("#stream-window-header .window-grab");
let el_info = $("stream-info");
if (online) {
let fps_suffix = (__client_fps >= 0 ? ` / ${__client_fps} fps` : "");
el_grab.innerHTML = el_info.innerHTML = `Stream – ${__resolution.width}x${__resolution.height}${fps_suffix}`;
} else {
el_grab.innerHTML = el_info.innerHTML = "Stream – offline";
}
};
var __clickScreenshotButton = function() {
let el_a = document.createElement("a");
el_a.href = "/streamer/snapshot";
el_a.target = "_blank";
document.body.appendChild(el_a);
el_a.click();
setTimeout(() => document.body.removeChild(el_a), 0);
};
var __clickResetButton = function() {
wm.confirm("Are you sure you want to reset stream?").then(function (ok) {
if (ok) {
let http = tools.makeRequest("POST", "/api/streamer/reset", function() {
if (http.readyState === 4) {
if (http.status !== 200) {
wm.error("Can't reset stream:<br>", http.responseText);
}
}
});
}
});
};
var __sendParam = function(name, value) {
let http = tools.makeRequest("POST", `/api/streamer/set_params?${name}=${value}`, function() {
if (http.readyState === 4) {
if (http.status !== 200) {
wm.error("Can't configure stream:<br>", http.responseText);
}
}
});
};
var __resize = function(center=false) {
let size = $("stream-size-slider").value;
$("stream-size-value").innerHTML = size + "%";
__size_factor = size / 100;
__applySizeFactor(center);
};
var __adjustSizeFactor = function() {
let el_window = $("stream-window");
let el_slider = $("stream-size-slider");
let view = wm.getViewGeometry();
for (let size = 100; size >= el_slider.min; size -= el_slider.step) {
tools.info("Stream: adjusting size:", size);
$("stream-size-slider").value = size;
__resize(true);
let rect = el_window.getBoundingClientRect();
if (
rect.bottom <= view.bottom
&& rect.top >= view.top
&& rect.left >= view.left
&& rect.right <= view.right
) {
break;
}
}
};
var __applySizeFactor = function(center=false) {
let el_stream_image = $("stream-image");
el_stream_image.style.width = __resolution.width * __size_factor + "px";
el_stream_image.style.height = __resolution.height * __size_factor + "px";
wm.showWindow($("stream-window"), false, center);
};
__init__();
}
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