1 files changed, 260 insertions, 0 deletions
diff --git a/js/vendor/gif-encode/client.js b/js/vendor/gif-encode/client.js
new file mode 100644
index 0000000..a6c09ec
--- /dev/null
+++ b/js/vendor/gif-encode/client.js
@@ -0,0 +1,260 @@
+// Total frames to record
+var FRAMES_PER_GIF = 36;
+
+// Frames per second to read from the video
+var FPS = 12;
+
+// Per-frame delay in milliseconds
+var DELAY = Math.floor( 1000 / FPS );
+
+// Number of WebWorkers to create
+var WORKERS = 4;
+
+// Number of frames to use to build the gif palette (takes longest)
+var FRAMES_TO_QUANTIZE = 4;
+
+// Upload these gifs when finished??
+var DO_UPLOAD = true;
+
+function GifEncoder(){
+	var base = this;
+  this.working = false;   
+  var canvases = [];
+  var contexts = [];
+  var frames = [];
+  var delays = [];
+
+	var initted = Date.now();
+	var started = Date.now();
+	var tube = base.tube = new Tube ()
+	
+	var workers = new Factory ();
+
+  var width, height;
+  var neuquant, colortab;
+
+	workers.hire("message", receiveMessage);
+	workers.hire("quantize", receiveQuantize);
+	workers.hire("encode", receiveEncode);
+
+	var reset = this.reset = function(){
+		canvases = [];
+		contexts = [];
+		frames = [];
+    delays = [];
+		width = 0;
+		height = 0;
+		neuquant = null;
+		colortab = null;
+		base.quantized = false
+	}
+	var resetFrames = this.resetFrames = function(){
+		canvases = [];
+		contexts = [];
+		frames = [];
+    delays = [];
+    width = 0;
+    height = 0;
+	}
+	
+	this.on = function(){
+    base.tube.on.apply(base.tube, arguments)
+  };
+
+  this.off = function(){
+    base.tube.off.apply(base.tube, arguments)
+  };
+
+  var addFrame = this.addFrame = function(canvas, delay) {
+    var ctx = canvas.getContext('2d');
+		canvases.push(canvas);
+    contexts.push(ctx);
+    delays.push(delay);
+    
+    if (canvases.length == 1) {
+      width = canvas.width;
+      height = canvas.height;
+    }
+  }
+
+  var copyFrame = this.copyFrame = function(canvas, delay) {
+    var newCanvas = document.createElement("canvas");
+    var ctx = newCanvas.getContext('2d');
+    
+    ctx.drawImage(canvas, 0, 0, canvas.width, canvas.height);
+    
+		canvases.push(newCanvas);
+    contexts.push(ctx);
+    delays.push(delay);
+    
+    if (canvases.length == 1) {
+      width = canvas.width;
+      height = canvas.height;
+    }
+  }
+  
+	function Factory () {
+		var base = this;
+		var w = 0; // which worker to work next
+    var ww = [];
+		base.init = function(){
+			for (var i = 0; i < WORKERS; i++) {
+				var worker = new Worker('gif-encode/worker.js');
+				worker.onmessage = base.receiveWork;
+				ww.push(worker);
+			}
+		}
+		var tasks = {};
+		base.hire = function(task, cb){
+			tasks[task] = cb;
+		}
+		base.work = function(job){
+			ww[++w % ww.length].postMessage(job);
+		}
+		base.receiveWork = function(e){
+			e.data.task in tasks && tasks[e.data.task](e);
+		}
+		base.init();
+	}
+
+	function receiveMessage(e){
+		console.log("[WORKER]", e.data.message);
+	}
+	
+  var neuquant, colortab;
+	var quantize = this.quantize = function () {
+		initted = Date.now();
+		started = Date.now();
+		var spritedata = spriteSheet(FRAMES_TO_QUANTIZE);
+		
+		workers.work({
+			task: 'quantize',
+			imageData: spritedata
+		});
+	}
+
+	function receiveQuantize(e) {
+		console.log(Date.now() - started, "quantization done");
+		neuquant = e.data.neuquant;
+		colortab = e.data.colortab;
+		base.quantized = true
+		base.tube("quantized")
+	}
+
+	var encode = this.encode = function (nq, ct) {
+	  nq = nq || neuquant
+	  ct = ct || colortab
+	  
+		started = Date.now();
+
+		console.log('working .... ');
+		var i = 0;
+
+		function sendWork () {
+			if (i == canvases.length) return doneSending();
+
+			var ctx = contexts[i];
+			var imdata = ctx.getImageData(0, 0, width, height).data;
+			var delay = delays[i];
+	
+			workers.work({
+				task: 'encode',
+				frame_index: i,
+				frame_length: contexts.length-1,
+				height: height,
+				width: width,
+				delay: delay,
+				imageData: imdata,
+				neuquant: neuquant,
+				colortab: colortab
+			});
+
+			i++;
+			setTimeout(sendWork, 16);
+		}
+		function doneSending(){
+		  base.tube("doneSending")
+			// ui.doneEncodingPicture();
+		}
+		sendWork();
+	}
+
+	function receiveEncode(e){
+		var frame_index = e.data["frame_index"];
+		var frame_data = e.data["frame_data"];
+	
+		frames[frame_index] = frame_data;
+		for (var j = 0; j < canvases.length; j++) {
+			if (frames[j] == null) {
+				return;
+			}
+		}
+		console.log("FINISHED " + canvases.length);
+		var binary_gif = frames.join('');
+		var base64_gif = window.btoa(binary_gif);
+		var data_url = 'data:image/gif;base64,'+base64_gif;
+		
+		base.working = false;
+
+		// photo.setAttribute('src', data_url);
+		// ui.doneEncodingPicture();
+    base.tube("rendered", binary_gif)
+    base.tube("rendered-url", data_url)
+// 		if (DO_UPLOAD) upload( base64_gif );
+
+		console.log((Date.now() - started), "processed frames");
+		console.log((Date.now() - initted), "done");
+	}
+	
+// 	function upload (base64_gif) {
+// 	  $("#working").html("UPLOADING")
+// 	  	
+//     console.log("starting upload")
+// 		var params = {
+// 			url: base64_gif
+// 		}
+//     $.ajax({
+//       'url': "/photos.json",
+//       'type': 'post',
+//       'data': csrf(params),
+//       'success': function(data){
+// 
+// //         $("#share").data("href", "/photos/" + data.hash)
+// //         $("#share, #make-another").fadeIn(400);
+// 				console.log(data);
+// 				console.log((Date.now() - started), "uploaded");
+// //         $("#photo").attr("src", data.url);
+// //         window.location.href = "/photos/" + data.hash
+//         localStorage.setItem('hash', data.hash)
+//         window.location.href = "/"
+//         // data.hash
+//       }
+//     });
+// 		console.log("ok");
+// 	}
+
+	function spriteSheet (frameCount) {
+		var start = Date.now();
+		frameCount = Math.min(contexts.length, frameCount);
+		var sprites = document.createElement("canvas");
+		var spriteContext = sprites.getContext('2d');
+		sprites.width = width;
+		sprites.height = height * frameCount;
+		var spritedata = spriteContext.getImageData(0, 0, sprites.width, sprites.height)
+		var spritedatadata = spritedata.data
+		var j = 0;
+		var ctxz = sample(contexts, 4);
+		while (frameCount--) {
+			var ctx = ctxz[frameCount];
+			var imdata = ctx.getImageData(0, 0, width, height).data;
+			for (var n = 0; n < imdata.length; j++, n++) {
+				spritedatadata[j] = imdata[n];
+			}
+		}
+		// spriteContext.putImageData(spritedata, 0, 0, 0, 0, sprites.width, sprites.height);
+		// upload( sprites.toDataURL("image/png").split(",")[1]
+		console.log(Date.now() - start, "built spritesheet");
+		return spritedata;
+	}
+ 
+}