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/*****************************************************************************
# #
# KVMD - The main PiKVM daemon. #
# #
# Copyright (C) 2018-2024 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/>. #
# #
*****************************************************************************/
"use strict";
import {tools, $} from "../tools.js";
export function MediaStreamer(__setActive, __setInactive, __setInfo) {
var self = this;
/************************************************************************/
var __stop = false;
var __ensuring = false;
var __ws = null;
var __ping_timer = null;
var __missed_heartbeats = 0;
var __decoder = null;
var __codec = "";
var __state = null;
var __frames = 0;
/************************************************************************/
self.getName = () => "HTTP H.264";
self.getMode = () => "media";
self.getResolution = function() {
let el = $("stream-canvas");
return {
// Разрешение видео или элемента
"real_width": (el.width || el.offsetWidth),
"real_height": (el.height || el.offsetHeight),
"view_width": el.offsetWidth,
"view_height": el.offsetHeight,
};
};
self.ensureStream = function(state) {
__state = state;
__stop = false;
__ensureMedia(false);
};
self.stopStream = function() {
__stop = true;
__ensuring = false;
__wsForceClose();
__setInfo(false, false, "");
};
var __ensureMedia = function(internal) {
if (__ws === null && !__stop && (!__ensuring || internal)) {
__ensuring = true;
__setInactive();
__setInfo(false, false, "");
__logInfo("Starting Media ...");
__ws = new WebSocket(`${tools.is_https ? "wss" : "ws"}://${location.host}/api/media/ws`);
__ws.binaryType = "arraybuffer";
__ws.onopen = __wsOpenHandler;
__ws.onerror = __wsErrorHandler;
__ws.onclose = __wsCloseHandler;
__ws.onmessage = async (event) => {
if (typeof event.data === "string") {
__wsJsonHandler(JSON.parse(event.data));
} else { // Binary
await __wsBinHandler(event.data);
}
};
}
};
var __wsOpenHandler = function(event) {
__logInfo("Socket opened:", event);
__missed_heartbeats = 0;
__ping_timer = setInterval(__ping, 1000);
};
var __ping = function() {
try {
__missed_heartbeats += 1;
if (__missed_heartbeats >= 5) {
throw new Error("Too many missed heartbeats");
}
__ws.send(new Uint8Array([0]));
if (__decoder && __decoder.state === "configured") {
let online = !!(__state && __state.source.online);
let info = `${__frames} fps dynamic`;
__frames = 0;
__setInfo(true, online, info);
}
} catch (ex) {
__wsErrorHandler(ex.message);
}
};
var __wsForceClose = function() {
if (__ws) {
__ws.onclose = null;
__ws.close();
}
__wsCloseHandler(null);
__setInactive();
};
var __wsErrorHandler = function(event) {
__logInfo("Socket error:", event);
__setInfo(false, false, event);
__wsForceClose();
};
var __wsCloseHandler = function(event) {
__logInfo("Socket closed:", event);
if (__ping_timer) {
clearInterval(__ping_timer);
__ping_timer = null;
}
if (__decoder) {
__decoder.close();
__decoder = null;
}
__missed_heartbeats = 0;
__frames = 0;
__ws = null;
if (!__stop) {
setTimeout(() => __ensureMedia(true), 1000);
}
};
var __wsJsonHandler = function(event) {
if (event.event_type === "media") {
__decoderCreate(event.event.video);
}
};
var __wsBinHandler = async (data) => {
let header = new Uint8Array(data.slice(0, 2));
if (header[0] === 255) { // Pong
__missed_heartbeats = 0;
} else if (header[0] === 1 && __decoder !== null) { // Video frame
let key = !!header[1];
if (__decoder.state !== "configured") {
if (!key) {
return;
}
await __decoder.configure({"codec": __codec, "optimizeForLatency": true});
}
let chunk = new EncodedVideoChunk({ // eslint-disable-line no-undef
"timestamp": (performance.now() + performance.timeOrigin) * 1000,
"type": (key ? "key" : "delta"),
"data": data.slice(2),
});
await __decoder.decode(chunk);
}
};
var __decoderCreate = function(formats) {
__decoderDestroy();
if (formats.h264 === undefined) {
let msg = "No H.264 stream available on PiKVM";
__setInfo(false, false, msg);
__logInfo(msg);
return;
}
if (!window.VideoDecoder) {
let msg = "This browser can't handle direct H.264 stream";
if (!tools.is_https) {
msg = "Direct H.264 requires HTTPS";
}
__setInfo(false, false, msg);
__logInfo(msg);
return;
}
__decoder = new VideoDecoder({ // eslint-disable-line no-undef
"output": (frame) => {
try {
let canvas = $("stream-canvas");
if (canvas.width !== frame.displayWidth || canvas.height !== frame.displayHeight) {
canvas.width = frame.displayWidth;
canvas.height = frame.displayHeight;
}
canvas.getContext("2d").drawImage(frame, 0, 0);
__frames += 1;
} finally {
frame.close();
}
},
"error": (err) => __logInfo(err.message),
});
__codec = `avc1.${formats.h264.profile_level_id}`;
__ws.send(JSON.stringify({
"event_type": "start",
"event": {"kind": "video", "format": "h264"},
}));
};
var __decoderDestroy = function() {
if (__decoder !== null) {
__decoder.close();
__decoder = null;
__codec = "";
}
};
var __logInfo = (...args) => tools.info("Stream [Media]:", ...args);
}
MediaStreamer.is_videodecoder_available = function() {
return !!window.VideoDecoder;
};
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