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Copy pathcamera.js
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Copy pathcamera.js
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414 lines (389 loc) · 12.9 KB
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var Camera = (function () {
const webCam = 0;
const wsCam = 1;
const jpgCam = 2;
const imgStreamCam = 3;
const videoStreamCam = 4;
class Camera {
// webCam: 0,1,2
// jpgCam: http://192.168.0.11/jpg
// wsCam: ws://192.168.43.110:8889/rws/ws
// videoCam: http://127.0.0.1:9966/walkman.mp4
constructor(camType) {
if (arguments.length == 0) {
camType = 0;
}
this.cnt = 0;
this.getImageFailure = false;
this.onCanvasCallbackList = [];
this.onReadyCallbackList = [];
this.setCamType(camType);
this.setFlip(false);
this.autoScale = false;
this.setRotate(0);
var flipStyle = document.createElement('style')
this.id = "canvas_" + ("" + Math.random()).substring(2);
flipStyle.innerHTML = "." + this.id + " {-moz-transform: scaleX(-1);-o-transform: scaleX(-1);-webkit-transform: scaleX(-1);transform: scaleX(-1);filter: FlipH;-ms-filter: 'FlipH';}";
document.body.appendChild(flipStyle);
}
onReady(cb) {
this.onReadyCallbackList.push(cb);
}
setAutoScale(autoScale) {
this.autoScale = autoScale;
}
getCanvas() {
return this.canvas;
}
setCamType(camType) {
this.cameraList = [];
if (isNaN(parseInt(camType))) {
this.URL = camType;
if (camType.indexOf("ws://") == 0) {
this.camType = wsCam;
} else if (camType.indexOf("http://") == 0 || camType.indexOf(".mp4") > 0) {
if (camType.indexOf(".mp4") > 0) {
this.camType = videoStreamCam;
} else if (camType.indexOf(":81/stream") > 0) {
this.camType = imgStreamCam;
} else {
this.camType = jpgCam;
}
this.rotate = false;
}
} else {
this.camType = webCam;
this.webCamSelect = camType;
}
}
setCanvas(canvas) {
if (typeof canvas == 'string') {
canvas = document.getElementById(canvas);
}
this.canvas = canvas;
return this;
}
setRotate(degrees) {
this.rotate = degrees;
return this;
}
setFlip(bool) {
this.flip = bool;
return this;
}
getFlip() {
return this.flip;
}
list(callback) {
var self = this;
this.enumerateDevices(function () {
callback(self.cameraList);
});
}
enumerateDevices(cb) {
var self = this;
return new Promise(function (resolve, reject) {
navigator.mediaDevices.enumerateDevices()
.then(function (o) {
self.gotDevices(self, o);
if (cb) cb();
resolve();
}).catch(self.handleError);
});
}
gotDevices(self, deviceInfos) {
for (var i = 0; i !== deviceInfos.length; ++i) {
var deviceInfo = deviceInfos[i];
if (deviceInfo.kind === 'videoinput') {
self.cameraList.push(deviceInfo);
}
}
}
async startCam() {
switch (this.camType) {
case webCam:
await this.enumerateDevices();
if (window.stream) {
window.stream.getTracks().forEach(function (track) {
track.stop();
});
}
var deviceId = 0;
try {
deviceId = this.cameraList[this.webCamSelect].deviceId;
} catch (e) {
console.log("can't found camType:", this.camType, "error:", e);
console.log(this.cameraList);
}
var constraints = {
video: {
deviceId: { exact: deviceId }
}
};
var self = this;
navigator.mediaDevices.getUserMedia(constraints).
then(function (stream) {
if (self.video) {
self.video.srcObject = stream;
}
}).catch(function (error) {
console.log('Error: ', error);
});
break;
/* WebRTC */
case wsCam:
console.log("WebRTC:", this.camType);
ConnectWebSocket(this.URL);
break;
case jpgCam:
// http://192.168.43.201:9966/ok.png
console.log("JPGCam:", this.camType);
console.log("URL:", this.URL);
break;
case imgStreamCam:
// http://192.168.43.201:9966/ok.png
console.log("imgStreamCam:", this.camType);
console.log("URL:", this.URL);
break;
case videoStreamCam:
// http://192.168.43.201:9966/walkman.mp4
console.log("videoStreamCam:", this.camType);
console.log("URL:", this.URL);
break;
}
}
getEle(eleOrId) {
return typeof eleOrId === 'object' ?
eleOrId : document.getElementById(eleOrId);
}
onImage(imageId_or_ele, callback) {
var self = this;
var image = this.getEle(imageId_or_ele);
image.setAttribute("crossOrigin", 'Anonymous');
var camSnapshotDelay = 0.5;
var param = this.URL.indexOf("?");
if (param > 0) {
camSnapshotDelay = parseFloat(this.URL.substring(param + 1));
this.URL = this.URL.substring(0, param);
}
camSnapshotDelay = camSnapshotDelay * 1000;
image.src = self.URL;
image.addEventListener('error', function () {
self.getImageFailure = true;
console.log('loading img failed.'); // you could try to load that resource again.
image.src = self.URL + "?" + Math.random();
});
image.onload = function () {
self.getImageFailure = false;
setTimeout(function () {
if (self.onCanvasCallbackList.length > 0) {
callback(image);
}
image.src = self.URL + "?" + Math.random();
}, camSnapshotDelay);
}
}
onCanvas(eleOrId, callback) {
var self = this;
//check if it's callback function
if (arguments.length == 0) {
callback = function () {};
eleOrId = this.getCanvas();
} else if (arguments.length == 1 &&
typeof eleOrId == 'function') {
callback = eleOrId;
eleOrId = this.getCanvas();
}
if (typeof callback == 'undefined') {
callback = function () {};
}
this.onCanvasCallbackList.push(callback);
var canvas = self.getEle(eleOrId);
if (this.flip) {
canvas.classList.add(this.id);
}
self.canvas = canvas;
self.ctx = canvas.getContext("2d");
this.buttonTrigger(canvas, function () {
self.startCam();
switch (self.camType) {
case webCam:
case wsCam:
var video = self.createVideo();
window.remoteVideo = self.video = video;
video.onloadeddata = function () {
var loop = function () {
if (self.cnt++ == 30 /* skip 30 frame*/ ) {
for (var i = 0; i < self.onReadyCallbackList.length; i++) {
self.onReadyCallbackList[i]();
}
}
var ctx = canvas.getContext('2d');
self.rotateImg(video, canvas, self.rotate, true);
if (self.onCanvasCallbackList.length > 0) {
for (var i = 0; i < self.onCanvasCallbackList.length; i++) {
self.onCanvasCallbackList[i](self.canvas, video);
}
}
requestAnimationFrame(loop);
}
requestAnimationFrame(loop);
}
break;
case jpgCam:
var ele = document.createElement('img');
self.onImage(ele, function (img) {
self.rotateImg(ele, canvas, self.rotate, false);
for (var i = 0; i < self.onCanvasCallbackList.length; i++) {
self.onCanvasCallbackList[i](self.canvas, video);
}
});
for (var i = 0; i < self.onReadyCallbackList.length; i++) {
self.onReadyCallbackList[i]();
}
break;
case imgStreamCam:
var ele = document.createElement('img');
ele.src = self.URL;
ele.setAttribute("crossOrigin", 'Anonymous');
ele.style.display = 'none';
document.getElementsByTagName("body")[0].append(ele);
var ctx = canvas.getContext('2d');
var loop = function () {
self.rotateImg(ele, canvas, self.rotate, false);
if (self.onCanvasCallbackList.length > 0) {
for (var i = 0; i < self.onCanvasCallbackList.length; i++) {
self.onCanvasCallbackList[i](self.canvas, video);
}
}
requestAnimationFrame(loop);
}
requestAnimationFrame(loop);
for (var i = 0; i < self.onReadyCallbackList.length; i++) {
self.onReadyCallbackList[i]();
}
break;
case videoStreamCam:
var video = self.createVideo();
console.log("start videoStream Cam");
window.remoteVideo = self.video = video;
var sourceMP4 = document.createElement("source");
video.appendChild(sourceMP4);
sourceMP4.type = "video/mp4";
sourceMP4.src = self.URL;
//
video.onloadeddata = function () {
var loop = function () {
for (var i = 0; i < self.onReadyCallbackList.length; i++) {
self.onReadyCallbackList[i]();
}
var ctx = canvas.getContext('2d');
self.rotateImg(video, canvas, self.rotate, true);
if (self.onCanvasCallbackList.length > 0) {
for (var i = 0; i < self.onCanvasCallbackList.length; i++) {
self.onCanvasCallbackList[i](self.canvas, video);
}
}
requestAnimationFrame(loop);
}
requestAnimationFrame(loop);
}
video.autoplay = 'autoplay';
video.muted = 'true';
video.play();
break;
}
});
return this;
}
toVideo(eleOrId) {
var self = this;
window.remoteVideo = self.video = this.getEle(eleOrId);
this.buttonTrigger(self.video, function () {
self.startCam();
});
}
createVideo() {
var video = document.createElement('video');
video.autoplay = true;
return video;
}
rotateImg(i, c, degrees, isVideo) {
var ctx = c.getContext("2d");
var iw = isVideo ? i.videoWidth : i.naturalWidth;
var ih = isVideo ? i.videoHeight : i.naturalHeight;
var cw = c.width;
var ch = c.height;
var iRatio = parseInt(100 * iw / ih) / 100;
var cRatio = parseInt(100 * cw / ch) / 100;
this.ctx.save();
if (cw != ch && (cRatio != iRatio) && !this.autoScale && !isVideo) {
ctx.translate(cw / 2, ch / 2);
ctx.rotate(degrees * 0.0174532925199432957);
ctx.translate(-ch / 2, -cw / 2);
ctx.drawImage(i, 0, 0, iw, ih, 0, 0, ch, cw);
} else {
ctx.translate(cw / 2, ch / 2);
ctx.rotate(degrees * 0.0174532925199432957);
ctx.translate(-cw / 2, -ch / 2);
this.drawImg(i, c, isVideo);
}
this.ctx.restore();
}
drawImg(i, c, isVideo) {
var iw = isVideo ? i.videoWidth : i.naturalWidth;
var ih = isVideo ? i.videoHeight : i.naturalHeight;
var cw = c.width;
var ch = c.height;
var sx = 0;
var sy = 0;
var cRatio = cw / ch;
if (iw >= ih) {
sx = (iw - (ih * cRatio)) / 2;
iw = ih * cRatio;
} else {
sy = (ih - (iw * cRatio)) / 2;
ih = iw * cRatio;
}
this.ctx.drawImage(i, sx, sy, iw, ih, 0, 0, cw, ch);
}
buttonTrigger(ele, callback) {
if (this.camType != 0 && this.camType != jpgCam && this.camType != imgStreamCam && this.camType != videoStreamCam) {
var btn = document.createElement("BUTTON");
btn.setAttribute("style", "background-color: #e0f0e0;position: fixed;z-index:2;top:5px;left:5px;font-size:96px");
document.getElementsByTagName("body")[0].append(btn);
var rect = ele.getBoundingClientRect();
btn.style.top = rect.top;
btn.style.left = rect.left;
btn.style.width = rect.width;
btn.style.height = rect.height;
btn.innerHTML = "Start Camera";
btn.addEventListener('click', function (e) {
btn.parentNode.removeChild(btn);
callback();
});
} else {
callback();
}
}
upload(url) {
if (this.getImageFailure) {
console.log("upload cancel...");
return;
}
this.canvas.toBlob(
function (blob) {
var fd = new FormData();
fd.append('file', blob, "img.jpg");
fetch(url, {
method: 'POST',
mode: 'cors',
body: fd
}).then(res => {
console.log("upload res:", res.status);
});
}, 'image/jpeg');
}
}
return Camera;
})();
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