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authorJulie Lala <jules@okfoc.us>2013-12-18 22:09:25 -0500
committerJulie Lala <jules@okfoc.us>2013-12-18 22:09:25 -0500
commit36a384f05993d22367127234dc45252ae6a3f4e7 (patch)
tree413d0a8c24e993ae481982e35713a80617e72ee9 /js
parentb3b2284ee4fbdd979c4e04c3d7605ff58d873938 (diff)
minified
Diffstat (limited to 'js')
-rw-r--r--js/gif-encode/worker.concat.js1467
-rw-r--r--js/record.concat.js720
-rw-r--r--js/record.min.js2
3 files changed, 2189 insertions, 0 deletions
diff --git a/js/gif-encode/worker.concat.js b/js/gif-encode/worker.concat.js
new file mode 100644
index 0000000..d26ba28
--- /dev/null
+++ b/js/gif-encode/worker.concat.js
@@ -0,0 +1,1467 @@
+/**
+* This class lets you encode animated GIF files
+* Base class : http://www.java2s.com/Code/Java/2D-Graphics-GUI/AnimatedGifEncoder.htm
+* @author Kevin Weiner (original Java version - kweiner@fmsware.com)
+* @author Thibault Imbert (AS3 version - bytearray.org)
+* @version 0.1 AS3 implementation
+*/
+
+//import flash.utils.ByteArray;
+//import flash.display.BitmapData;
+//import flash.display.Bitmap;
+//import org.bytearray.gif.encoder.NeuQuant
+//import flash.net.URLRequestHeader;
+//import flash.net.URLRequestMethod;
+//import flash.net.URLRequest;
+//import flash.net.navigateToURL;
+
+GIFEncoder = function() {
+ for(var i = 0, chr = {}; i < 256; i++) {
+ chr[i] = String.fromCharCode(i);
+ }
+
+ function ByteArray(){
+ this.bin = [];
+ }
+
+ ByteArray.prototype.getData = function(){
+ for(var v = '', l = this.bin.length, i = 0; i < l; i++) {
+ v += chr[this.bin[i]];
+ }
+ return v;
+ }
+ ByteArray.prototype.writeByte = function(val){
+ this.bin.push(val);
+ }
+ ByteArray.prototype.writeUTFBytes = function(string) {
+ for(var l = string.length, i = 0; i < l; i++) {
+ this.writeByte(string.charCodeAt(i));
+ }
+ }
+ ByteArray.prototype.writeBytes = function(array, offset, length) {
+ for(var l = length || array.length, i = offset||0; i < l; i++) {
+ this.writeByte(array[i]);
+ }
+ }
+
+ var exports = {};
+ var width/*int*/ // image size
+ var height/*int*/;
+ var transparent/***/ = null; // transparent color if given
+ var transIndex/*int*/; // transparent index in color table
+ var repeat/*int*/ = -1; // no repeat
+ var delay/*int*/ = 0; // frame delay (hundredths)
+ var started/*Boolean*/ = false; // ready to output frames
+ var out/*ByteArray*/;
+ var image/*Bitmap*/; // current frame
+ var pixels/*ByteArray*/; // BGR byte array from frame
+ var indexedPixels/*ByteArray*/ // converted frame indexed to palette
+ var colorDepth/*int*/; // number of bit planes
+ var colorTab/*ByteArray*/; // RGB palette
+ var usedEntry/*Array*/ = new Array; // active palette entries
+ var palSize/*int*/ = 7; // color table size (bits-1)
+ var dispose/*int*/ = -1; // disposal code (-1 = use default)
+ var closeStream/*Boolean*/ = false; // close stream when finished
+ var firstFrame/*Boolean*/ = true;
+ var sizeSet/*Boolean*/ = false; // if false, get size from first frame
+ var sample/*int*/ = 1; // default sample interval for quantizer
+ var neuquantBrain = null; // allow loading in a prefab neural net
+
+ /**
+ * Sets the delay time between each frame, or changes it for subsequent frames
+ * (applies to last frame added)
+ * int delay time in milliseconds
+ * @param ms
+ */
+
+ var setDelay = exports.setDelay = function setDelay(ms/*int*/) {
+ delay = Math.round(ms / 10);
+ }
+
+ /**
+ * Sets the GIF frame disposal code for the last added frame and any
+ *
+ * subsequent frames. Default is 0 if no transparent color has been set,
+ * otherwise 2.
+ * @param code
+ * int disposal code.
+ */
+
+ var setDispose = exports.setDispose = function setDispose(code/*int*/) {
+ if (code >= 0) dispose = code;
+ }
+
+ /**
+ * Sets the number of times the set of GIF frames should be played. Default is
+ * 1; 0 means play indefinitely. Must be invoked before the first image is
+ * added.
+ *
+ * @param iter
+ * int number of iterations.
+ * @return
+ */
+
+ var setRepeat = exports.setRepeat = function setRepeat(iter/*int*/) {
+ if (iter >= 0) repeat = iter;
+ }
+
+ /**
+ * Sets the transparent color for the last added frame and any subsequent
+ * frames. Since all colors are subject to modification in the quantization
+ * process, the color in the final palette for each frame closest to the given
+ * color becomes the transparent color for that frame. May be set to null to
+ * indicate no transparent color.
+ * @param
+ * Color to be treated as transparent on display.
+ */
+
+ var setTransparent = exports.setTransparent = function setTransparent(c/*Number*/) {
+ transparent = c;
+ }
+
+ /**
+ * The addFrame method takes an incoming BitmapData object to create each frames
+ * @param
+ * BitmapData object to be treated as a GIF's frame
+ */
+
+ /*Boolean*/
+ var addFrame = exports.addFrame = function addFrame(im/*BitmapData*/, is_imageData) {
+ if ((im == null) || ! started || out == null) {
+ throw new Error ("Please call start method before calling addFrame");
+ return false;
+ }
+
+ var ok/*Boolean*/ = true;
+
+ try {
+ if ( ! is_imageData) {
+ image = im.getImageData(0,0, im.canvas.width, im.canvas.height).data;
+ if ( ! sizeSet) {
+ setSize(im.canvas.width, im.canvas.height);
+ }
+ }
+ else {
+ image = im;
+ }
+ getImagePixels(); // convert to correct format if necessary
+ analyzePixels(); // build color table & map pixels
+
+ if (firstFrame) {
+ writeLSD(); // logical screen descriptior
+ writePalette(); // global color table
+ if (repeat >= 0) {
+ // use NS app extension to indicate reps
+ writeNetscapeExt();
+ }
+ }
+
+ writeGraphicCtrlExt(); // write graphic control extension
+ writeImageDesc(); // image descriptor
+ if (!firstFrame) {
+ writePalette(); // local color table
+ }
+ writePixels(); // encode and write pixel data
+ firstFrame = false;
+ }
+ catch (e/*Error*/) {
+ ok = false;
+ }
+ return ok;
+ }
+
+ /**
+ * Adds final trailer to the GIF stream, if you don't call the finish method
+ * the GIF stream will not be valid.
+ */
+
+ /*Boolean*/
+ var finish = exports.finish = function finish() {
+ if ( ! started) {
+ return false;
+ }
+
+ var ok/*Boolean*/ = true;
+ started = false;
+ try {
+ out.writeByte(0x3b); // gif trailer
+ }
+ catch (e/*Error*/) {
+ ok = false;
+ }
+ return ok;
+ }
+
+ /**
+ * Resets some members so that a new stream can be started.
+ * This method is actually called by the start method
+ */
+
+ var reset = function reset () {
+ // reset for subsequent use
+ transIndex = 0;
+ image = null;
+ pixels = null;
+ indexedPixels = null;
+ colorTab = null;
+ closeStream = false;
+ firstFrame = true;
+ }
+
+ /**
+ * * Sets frame rate in frames per second. Equivalent to
+ * <code>setDelay(1000/fps)</code>.
+ * @param fps
+ * float frame rate (frames per second)
+ */
+
+ var setFrameRate = exports.setFrameRate = function setFrameRate(fps/*Number*/) {
+ if (fps != 0xf) {
+ delay = Math.round(100/fps);
+ }
+ }
+
+ /**
+ * Sets quality of color quantization (conversion of images to the maximum 256
+ * colors allowed by the GIF specification). Lower values (minimum = 1)
+ * produce better colors, but slow processing significantly. 10 is the
+ * default, and produces good color mapping at reasonable speeds. Values
+ * greater than 20 do not yield significant improvements in speed.
+ * @param quality
+ * int greater than 0.
+ * @return
+ */
+
+ var setQuality = exports.setQuality = function setQuality(quality/*int*/) {
+ sample = Math.max(1, quality);
+ }
+
+ /**
+ * Sets the GIF frame size. The default size is the size of the first frame
+ * added if this method is not invoked.
+ * @param w
+ * int frame width.
+ * @param h
+ * int frame width.
+ */
+
+ var setSize = exports.setSize = function setSize(w/*int*/, h/*int*/) {
+ if (started && !firstFrame) {
+ return;
+ }
+ width = w;
+ height = h;
+ if (width < 1) width = 320;
+ if (height < 1) height = 240;
+ sizeSet = true;
+ }
+
+ /**
+ * After running the Neuquant on some test frames, it can be exported and then loaded
+ * into an uninitialized NQ instance on another worker and used accordingly.
+ */
+ var setNeuquant = exports.setNeuquant = function setNeuquant(neuquant, colors){
+ neuquantBrain = neuquant;
+ colorTab = colors;
+ }
+
+ /**
+ * Initiates GIF file creation on the given stream.
+ * @param os
+ * OutputStream on which GIF images are written.
+ * @return false if initial write failed.
+ */
+
+ var start = exports.start = function start() {
+ reset();
+ var ok/*Boolean*/ = true;
+ closeStream = false;
+ out = new ByteArray;
+ try {
+ out.writeUTFBytes("GIF89a"); // header
+ } catch (e/*Error*/) {
+ ok = false;
+ }
+
+ return started = ok;
+ }
+
+ var cont = exports.cont = function cont() {
+ reset();
+ var ok = true;
+ closeStream = false;
+ out = new ByteArray ();
+ return started = ok;
+ }
+
+ /**
+ * Analyzes image colors and creates color map.
+ */
+
+ var analyzePixels = function analyzePixels() {
+ var len = pixels.length;
+ var nPix = len / 3;
+ indexedPixels = [];
+ // initialize quantizer
+
+ var nq;
+ if (neuquantBrain && colorTab) {
+ nq = new NeuQuant();
+ nq.load(neuquantBrain);
+ }
+ else {
+ nq = new NeuQuant (pixels, len, sample);
+ colorTab = nq.process(); // create reduced palette
+ }
+
+ // map image pixels to new palette
+ var k = 0;
+ for (var j = 0; j < nPix; j++) {
+ var index = nq.map(pixels[k++] & 0xff, pixels[k++] & 0xff, pixels[k++] & 0xff);
+ usedEntry[index] = true;
+ indexedPixels[j] = index;
+ }
+ pixels = null;
+ colorDepth = 8;
+ palSize = 7;
+
+ // get closest match to transparent color if specified
+ if (transparent != null) {
+ transIndex = findClosest(transparent);
+ }
+ }
+
+ /**
+ * Returns index of palette color closest to c
+ */
+
+ var findClosest = function findClosest(c/*Number*/) {
+ if (colorTab == null) return -1;
+ var r = (c & 0xFF0000) >> 16;
+ var g = (c & 0x00FF00) >> 8;
+ var b = (c & 0x0000FF);
+ var minpos = 0;
+ var dmin = 256 * 256 * 256;
+ var len = colorTab.length;
+
+ for (var i = 0; i < len;) {
+ var dr = r - (colorTab[i++] & 0xff);
+ var dg = g - (colorTab[i++] & 0xff);
+ var db = b - (colorTab[i] & 0xff);
+ var d = dr * dr + dg * dg + db * db;
+ var index = i / 3;
+ if (usedEntry[index] && (d < dmin)) {
+ dmin = d;
+ minpos = index;
+ }
+ i++;
+ }
+ return minpos;
+ }
+
+ /**
+ * Extracts image pixels into byte array "pixels
+ */
+
+ var getImagePixels = function getImagePixels() {
+ var w = width;
+ var h = height;
+ pixels = [];
+ var data = image;
+ var count/*int*/ = 0;
+
+ for ( var i/*int*/ = 0; i < h; i++ ) {
+ for (var j/*int*/ = 0; j < w; j++ ) {
+ var b = (i*w*4)+j*4;
+ pixels[count++] = data[b];
+ pixels[count++] = data[b+1];
+ pixels[count++] = data[b+2];
+ }
+ }
+ }
+
+ /**
+ * Writes Graphic Control Extension
+ */
+
+ var writeGraphicCtrlExt = function writeGraphicCtrlExt() {
+ out.writeByte(0x21); // extension introducer
+ out.writeByte(0xf9); // GCE label
+ out.writeByte(4); // data block size
+ var transp/*int*/
+ var disp/*int*/;
+ if (transparent == null) {
+ transp = 0;
+ disp = 0; // dispose = no action
+ }
+ else {
+ transp = 1;
+ disp = 2; // force clear if using transparent color
+ }
+ if (dispose >= 0) {
+ disp = dispose & 7; // user override
+ }
+ disp <<= 2;
+ // packed fields
+ out.writeByte(0 | // 1:3 reserved
+ disp | // 4:6 disposal
+ 0 | // 7 user input - 0 = none
+ transp); // 8 transparency flag
+
+ WriteShort(delay); // delay x 1/100 sec
+ out.writeByte(transIndex); // transparent color index
+ out.writeByte(0); // block terminator
+ }
+
+ /**
+ * Writes Image Descriptor
+ */
+
+ var writeImageDesc = function writeImageDesc() {
+ out.writeByte(0x2c); // image separator
+ WriteShort(0); // image position x,y = 0,0
+ WriteShort(0);
+ WriteShort(width); // image size
+ WriteShort(height);
+
+ // packed fields
+ if (firstFrame) {
+ // no LCT - GCT is used for first (or only) frame
+ out.writeByte(0);
+ }
+ else {
+ // specify normal LCT
+ out.writeByte(0x80 | // 1 local color table 1=yes
+ 0 | // 2 interlace - 0=no
+ 0 | // 3 sorted - 0=no
+ 0 | // 4-5 reserved
+ palSize); // 6-8 size of color table
+ }
+ }
+
+ /**
+ * Writes Logical Screen Descriptor
+ */
+
+ var writeLSD = function writeLSD() {
+ // logical screen size
+ WriteShort(width);
+ WriteShort(height);
+ // packed fields
+ out.writeByte((0x80 | // 1 : global color table flag = 1 (gct used)
+ 0x70 | // 2-4 : color resolution = 7
+ 0x00 | // 5 : gct sort flag = 0
+ palSize)); // 6-8 : gct size
+
+ out.writeByte(0); // background color index
+ out.writeByte(0); // pixel aspect ratio - assume 1:1
+ }
+
+ /**
+ * Writes Netscape application extension to define repeat count.
+ */
+
+ var writeNetscapeExt = function writeNetscapeExt() {
+ out.writeByte(0x21); // extension introducer
+ out.writeByte(0xff); // app extension label
+ out.writeByte(11); // block size
+ out.writeUTFBytes("NETSCAPE" + "2.0"); // app id + auth code
+ out.writeByte(3); // sub-block size
+ out.writeByte(1); // loop sub-block id
+ WriteShort(repeat); // loop count (extra iterations, 0=repeat forever)
+ out.writeByte(0); // block terminator
+ }
+
+ /**
+ * Writes color table
+ */
+ var writePalette = function writePalette() {
+ out.writeBytes(colorTab);
+ var n/*int*/ = (3 * 256) - colorTab.length;
+ for (var i/*int*/ = 0; i < n; i++) {
+ out.writeByte(0);
+ }
+ }
+
+ var WriteShort = function WriteShort (pValue/*int*/) {
+ out.writeByte( pValue & 0xFF );
+ out.writeByte( (pValue >> 8) & 0xFF);
+ }
+
+ /**
+ * Encodes and writes pixel data
+ */
+ var writePixels = function writePixels() {
+ var myencoder = new LZWEncoder(width, height, indexedPixels, colorDepth);
+ myencoder.encode(out);
+ }
+
+ /**
+ * retrieves the GIF stream
+ */
+ var stream = exports.stream = function stream () {
+ return out;
+ }
+
+ var setProperties = exports.setProperties = function setProperties(has_start, is_first) {
+ started = has_start;
+ firstFrame = is_first;
+ }
+
+ return exports;
+}
+
+;/**
+* This class handles LZW encoding
+* Adapted from Jef Poskanzer's Java port by way of J. M. G. Elliott.
+* @author Kevin Weiner (original Java version - kweiner@fmsware.com)
+* @author Thibault Imbert (AS3 version - bytearray.org)
+* @version 0.1 AS3 implementation
+*/
+
+//import flash.utils.ByteArray;
+
+LZWEncoder = function()
+{
+ var exports = {};
+ /*private_static*/ var EOF/*int*/ = -1;
+ /*private*/ var imgW/*int*/;
+ /*private*/ var imgH/*int*/
+ /*private*/ var pixAry/*ByteArray*/;
+ /*private*/ var initCodeSize/*int*/;
+ /*private*/ var remaining/*int*/;
+ /*private*/ var curPixel/*int*/;
+
+ // GIFCOMPR.C - GIF Image compression routines
+ // Lempel-Ziv compression based on 'compress'. GIF modifications by
+ // David Rowley (mgardi@watdcsu.waterloo.edu)
+ // General DEFINEs
+
+ /*private_static*/ var BITS/*int*/ = 12;
+ /*private_static*/ var HSIZE/*int*/ = 5003; // 80% occupancy
+
+ // GIF Image compression - modified 'compress'
+ // Based on: compress.c - File compression ala IEEE Computer, June 1984.
+ // By Authors: Spencer W. Thomas (decvax!harpo!utah-cs!utah-gr!thomas)
+ // Jim McKie (decvax!mcvax!jim)
+ // Steve Davies (decvax!vax135!petsd!peora!srd)
+ // Ken Turkowski (decvax!decwrl!turtlevax!ken)
+ // James A. Woods (decvax!ihnp4!ames!jaw)
+ // Joe Orost (decvax!vax135!petsd!joe)
+
+ /*private*/ var n_bits/*int*/ // number of bits/code
+ /*private*/ var maxbits/*int*/ = BITS; // user settable max # bits/code
+ /*private*/ var maxcode/*int*/ // maximum code, given n_bits
+ /*private*/ var maxmaxcode/*int*/ = 1 << BITS; // should NEVER generate this code
+ /*private*/ var htab/*Array*/ = new Array;
+ /*private*/ var codetab/*Array*/ = new Array;
+ /*private*/ var hsize/*int*/ = HSIZE; // for dynamic table sizing
+ /*private*/ var free_ent/*int*/ = 0; // first unused entry
+
+ // block compression parameters -- after all codes are used up,
+ // and compression rate changes, start over.
+
+ /*private*/ var clear_flg/*Boolean*/ = false;
+
+ // Algorithm: use open addressing double hashing (no chaining) on the
+ // prefix code / next character combination. We do a variant of Knuth's
+ // algorithm D (vol. 3, sec. 6.4) along with G. Knott's relatively-prime
+ // secondary probe. Here, the modular division first probe is gives way
+ // to a faster exclusive-or manipulation. Also do block compression with
+ // an adaptive reset, whereby the code table is cleared when the compression
+ // ratio decreases, but after the table fills. The variable-length output
+ // codes are re-sized at this point, and a special CLEAR code is generated
+ // for the decompressor. Late addition: construct the table according to
+ // file size for noticeable speed improvement on small files. Please direct
+ // questions about this implementation to ames!jaw.
+
+ /*private*/ var g_init_bits/*int*/;
+ /*private*/ var ClearCode/*int*/;
+ /*private*/ var EOFCode/*int*/;
+
+ // output
+ // Output the given code.
+ // Inputs:
+ // code: A n_bits-bit integer. If == -1, then EOF. This assumes
+ // that n_bits =< wordsize - 1.
+ // Outputs:
+ // Outputs code to the file.
+ // Assumptions:
+ // Chars are 8 bits long.
+ // Algorithm:
+ // Maintain a BITS character long buffer (so that 8 codes will
+ // fit in it exactly). Use the VAX insv instruction to insert each
+ // code in turn. When the buffer fills up empty it and start over.
+
+ /*private*/ var cur_accum/*int*/ = 0;
+ /*private*/ var cur_bits/*int*/ = 0;
+ /*private*/ var masks/*Array*/ = [ 0x0000, 0x0001, 0x0003, 0x0007, 0x000F, 0x001F, 0x003F, 0x007F, 0x00FF, 0x01FF, 0x03FF, 0x07FF, 0x0FFF, 0x1FFF, 0x3FFF, 0x7FFF, 0xFFFF ];
+
+ // Number of characters so far in this 'packet'
+ /*private*/ var a_count/*int*/;
+
+ // Define the storage for the packet accumulator
+ /*private*/ var accum/*ByteArray*/ = [];
+
+ var LZWEncoder = exports.LZWEncoder = function LZWEncoder (width/*int*/, height/*int*/, pixels/*ByteArray*/, color_depth/*int*/)
+ {
+
+ imgW = width;
+ imgH = height;
+ pixAry = pixels;
+ initCodeSize = Math.max(2, color_depth);
+
+ }
+
+ // Add a character to the end of the current packet, and if it is 254
+ // characters, flush the packet to disk.
+ var char_out = function char_out(c/*Number*/, outs/*ByteArray*/)/*void*/
+ {
+ accum[a_count++] = c;
+ if (a_count >= 254) flush_char(outs);
+
+ }
+
+ // Clear out the hash table
+ // table clear for block compress
+
+ var cl_block = function cl_block(outs/*ByteArray*/)/*void*/
+ {
+
+ cl_hash(hsize);
+ free_ent = ClearCode + 2;
+ clear_flg = true;
+ output(ClearCode, outs);
+
+ }
+
+ // reset code table
+ var cl_hash = function cl_hash(hsize/*int*/)/*void*/
+ {
+
+ for (var i/*int*/ = 0; i < hsize; ++i) htab[i] = -1;
+
+ }
+
+ var compress = exports.compress = function compress(init_bits/*int*/, outs/*ByteArray*/)/*void*/
+
+ {
+ var fcode/*int*/;
+ var i/*int*/ /* = 0 */;
+ var c/*int*/;
+ var ent/*int*/;
+ var disp/*int*/;
+ var hsize_reg/*int*/;
+ var hshift/*int*/;
+
+ // Set up the globals: g_init_bits - initial number of bits
+ g_init_bits = init_bits;
+
+ // Set up the necessary values
+ clear_flg = false;
+ n_bits = g_init_bits;
+ maxcode = MAXCODE(n_bits);
+
+ ClearCode = 1 << (init_bits - 1);
+ EOFCode = ClearCode + 1;
+ free_ent = ClearCode + 2;
+
+ a_count = 0; // clear packet
+
+ ent = nextPixel();
+
+ hshift = 0;
+ for (fcode = hsize; fcode < 65536; fcode *= 2)
+ ++hshift;
+ hshift = 8 - hshift; // set hash code range bound
+
+ hsize_reg = hsize;
+ cl_hash(hsize_reg); // clear hash table
+
+ output(ClearCode, outs);
+
+ outer_loop: while ((c = nextPixel()) != EOF)
+
+ {
+
+ fcode = (c << maxbits) + ent;
+ i = (c << hshift) ^ ent; // xor hashing
+
+ if (htab[i] == fcode)
+ {
+ ent = codetab[i];
+ continue;
+ } else if (htab[i] >= 0) // non-empty slot
+ {
+ disp = hsize_reg - i; // secondary hash (after G. Knott)
+ if (i == 0)
+ disp = 1;
+ do
+ {
+
+ if ((i -= disp) < 0) i += hsize_reg;
+
+ if (htab[i] == fcode)
+ {
+ ent = codetab[i];
+ continue outer_loop;
+ }
+ } while (htab[i] >= 0);
+ }
+
+ output(ent, outs);
+ ent = c;
+ if (free_ent < maxmaxcode)
+ {
+ codetab[i] = free_ent++; // code -> hashtable
+ htab[i] = fcode;
+ } else cl_block(outs);
+ }
+
+ // Put out the final code.
+ output(ent, outs);
+ output(EOFCode, outs);
+
+ }
+
+ // ----------------------------------------------------------------------------
+ var encode = exports.encode = function encode(os/*ByteArray*/)/*void*/
+ {
+ os.writeByte(initCodeSize); // write "initial code size" byte
+ remaining = imgW * imgH; // reset navigation variables
+ curPixel = 0;
+ compress(initCodeSize + 1, os); // compress and write the pixel data
+ os.writeByte(0); // write block terminator
+
+ }
+
+ // Flush the packet to disk, and reset the accumulator
+ var flush_char = function flush_char(outs/*ByteArray*/)/*void*/
+ {
+
+ if (a_count > 0)
+ {
+ outs.writeByte(a_count);
+ outs.writeBytes(accum, 0, a_count);
+ a_count = 0;
+ }
+
+ }
+
+ var MAXCODE = function MAXCODE(n_bits/*int*/)/*int*/
+ {
+
+ return (1 << n_bits) - 1;
+
+ }
+
+ // ----------------------------------------------------------------------------
+ // Return the next pixel from the image
+ // ----------------------------------------------------------------------------
+
+ var nextPixel = function nextPixel()/*int*/
+ {
+
+ if (remaining == 0) return EOF;
+
+ --remaining;
+
+ var pix/*Number*/ = pixAry[curPixel++];
+
+ return pix & 0xff;
+
+ }
+
+ var output = function output(code/*int*/, outs/*ByteArray*/)/*void*/
+
+ {
+ cur_accum &= masks[cur_bits];
+
+ if (cur_bits > 0) cur_accum |= (code << cur_bits);
+ else cur_accum = code;
+
+ cur_bits += n_bits;
+
+ while (cur_bits >= 8)
+
+ {
+
+ char_out((cur_accum & 0xff), outs);
+ cur_accum >>= 8;
+ cur_bits -= 8;
+
+ }
+
+ // If the next entry is going to be too big for the code size,
+ // then increase it, if possible.
+
+ if (free_ent > maxcode || clear_flg)
+ {
+
+ if (clear_flg)
+ {
+
+ maxcode = MAXCODE(n_bits = g_init_bits);
+ clear_flg = false;
+
+ } else
+ {
+
+ ++n_bits;
+
+ if (n_bits == maxbits) maxcode = maxmaxcode;
+
+ else maxcode = MAXCODE(n_bits);
+
+ }
+
+ }
+
+ if (code == EOFCode)
+ {
+
+ // At EOF, write the rest of the buffer.
+ while (cur_bits > 0)
+ {
+
+ char_out((cur_accum & 0xff), outs);
+ cur_accum >>= 8;
+ cur_bits -= 8;
+ }
+
+
+ flush_char(outs);
+
+ }
+
+ }
+ LZWEncoder.apply(this, arguments);
+ return exports;
+}
+
+;/*
+* NeuQuant Neural-Net Quantization Algorithm
+* ------------------------------------------
+*
+* Copyright (c) 1994 Anthony Dekker
+*
+* NEUQUANT Neural-Net quantization algorithm by Anthony Dekker, 1994. See
+* "Kohonen neural networks for optimal colour quantization" in "Network:
+* Computation in Neural Systems" Vol. 5 (1994) pp 351-367. for a discussion of
+* the algorithm.
+*
+* Any party obtaining a copy of these files from the author, directly or
+* indirectly, is granted, free of charge, a full and unrestricted irrevocable,
+* world-wide, paid up, royalty-free, nonexclusive right and license to deal in
+* this software and documentation files (the "Software"), including without
+* limitation the rights to use, copy, modify, merge, publish, distribute,
+* sublicense, and/or sell copies of the Software, and to permit persons who
+* receive copies from any such party to do so, with the only requirement being
+* that this copyright notice remain intact.
+*/
+
+/*
+* This class handles Neural-Net quantization algorithm
+* @author Kevin Weiner (original Java version - kweiner@fmsware.com)
+* @author Thibault Imbert (AS3 version - bytearray.org)
+* @version 0.1 AS3 implementation
+*/
+
+//import flash.utils.ByteArray;
+
+NeuQuant = function() {
+ var exports = {};
+ var netsize = 128; /* number of colours used */
+
+ /* four primes near 500 - assume no image has a length so large */
+ /* that it is divisible by all four primes */
+
+ var prime1 = 499;
+ var prime2 = 491;
+ var prime3 = 487;
+ var prime4 = 503;
+ var minpicturebytes = (3 * prime4);
+
+ /* minimum size for input image */
+ /*
+ * Program Skeleton ---------------- [select samplefac in range 1..30] [read
+ * image from input file] pic = (unsigned char*) malloc(3*width*height);
+ * initnet(pic,3*width*height,samplefac); learn(); unbiasnet(); [write output
+ * image header, using writecolourmap(f)] inxbuild(); write output image using
+ * inxsearch(b,g,r)
+ */
+
+ /*
+ * Network Definitions -------------------
+ */
+
+ var maxnetpos = (netsize - 1);
+ var netbiasshift = 4; /* bias for colour values */
+ var ncycles = 100; /* no. of learning cycles */
+
+ /* defs for freq and bias */
+ var intbiasshift = 16; /* bias for fractions */
+ var intbias = (1 << intbiasshift);
+ var gammashift = 10; /* gamma = 1024 */
+ var gamma = (1 << gammashift);
+ var betashift = 10;
+ var beta = (intbias >> betashift); /* beta = 1/1024 */
+ var betagamma = (intbias << (gammashift - betashift));
+
+ /* defs for decreasing radius factor */
+ var initrad = (netsize >> 3); /* for 256 cols, radius starts */
+ var radiusbiasshift = 6; /* at 32.0 biased by 6 bits */
+ var radiusbias = (1 << radiusbiasshift);
+ var initradius = (initrad * radiusbias); /* and decreases by a */
+ var radiusdec = 30; /* factor of 1/30 each cycle */
+
+ /* defs for decreasing alpha factor */
+ var alphabiasshift = 10; /* alpha starts at 1.0 */
+ var initalpha = (1 << alphabiasshift);
+ var alphadec /* biased by 10 bits */
+
+ /* radbias and alpharadbias used for radpower calculation */
+ var radbiasshift = 8;
+ var radbias = (1 << radbiasshift);
+ var alpharadbshift = (alphabiasshift + radbiasshift);
+
+ var alpharadbias = (1 << alpharadbshift);
+
+ /*
+ * Types and Global Variables --------------------------
+ */
+
+ var thepicture/*ByteArray*//* the input image itself */
+ var lengthcount; /* lengthcount = H*W*3 */
+ var samplefac; /* sampling factor 1..30 */
+
+ // typedef int pixel[4]; /* BGRc */
+ var network; /* the network itself - [netsize][4] */
+ var netindex = new Array();
+
+ /* for network lookup - really 256 */
+ var bias = new Array();
+
+ /* bias and freq arrays for learning */
+ var freq = new Array();
+ var radpower = new Array();
+
+ var NeuQuant = exports.NeuQuant = function NeuQuant(thepic, len, sample) {
+
+ // with no input, assume we'll load in a lobotomized neuquant later.
+ // otherwise, initialize the neural net stuff
+
+ if (thepic && len && sample) {
+ var i;
+ var p;
+
+ thepicture = thepic;
+ lengthcount = len;
+ samplefac = sample;
+
+ network = new Array(netsize);
+
+ for (i = 0; i < netsize; i++) {
+ network[i] = new Array(4);
+ p = network[i];
+ p[0] = p[1] = p[2] = (i << (netbiasshift + 8)) / netsize;
+ freq[i] = intbias / netsize; /* 1/netsize */
+ bias[i] = 0;
+ }
+ }
+ }
+
+ var colorMap = function colorMap() {
+ var map/*ByteArray*/ = [];
+ var index = new Array(netsize);
+ for (var i = 0; i < netsize; i++) {
+ index[network[i][3]] = i;
+ }
+ var k = 0;
+ for (var l = 0; l < netsize; l++) {
+ var j = index[l];
+ map[k++] = (network[j][0]);
+ map[k++] = (network[j][1]);
+ map[k++] = (network[j][2]);
+ }
+ return map;
+ }
+
+ /*
+ * Insertion sort of network and building of netindex[0..255] (to do after
+ * unbias)
+ * -------------------------------------------------------------------------------
+ */
+
+ var inxbuild = function inxbuild() {
+ var i;
+ var j;
+ var smallpos;
+ var smallval;
+ var p;
+ var q;
+ var previouscol
+ var startpos
+
+ previouscol = 0;
+ startpos = 0;
+ for (i = 0; i < netsize; i++) {
+ p = network[i];
+ smallpos = i;
+ smallval = p[1]; /* index on g */
+ /* find smallest in i..netsize-1 */
+ for (j = i + 1; j < netsize; j++) {
+ q = network[j];
+ if (q[1] < smallval) { /* index on g */
+ smallpos = j;
+ smallval = q[1]; /* index on g */
+ }
+ }
+
+ q = network[smallpos];
+ /* swap p (i) and q (smallpos) entries */
+
+ if (i != smallpos) {
+ j = q[0];
+ q[0] = p[0];
+ p[0] = j;
+ j = q[1];
+ q[1] = p[1];
+ p[1] = j;
+ j = q[2];
+ q[2] = p[2];
+ p[2] = j;
+ j = q[3];
+ q[3] = p[3];
+ p[3] = j;
+ }
+
+ /* smallval entry is now in position i */
+
+ if (smallval != previouscol) {
+ netindex[previouscol] = (startpos + i) >> 1;
+
+ for (j = previouscol + 1; j < smallval; j++) netindex[j] = i;
+
+ previouscol = smallval;
+ startpos = i;
+ }
+ }
+
+ netindex[previouscol] = (startpos + maxnetpos) >> 1;
+ for (j = previouscol + 1; j < 256; j++) netindex[j] = maxnetpos; /* really 256 */
+ }
+
+ /*
+ * Main Learning Loop ------------------
+ */
+
+ var learn = function learn() {
+ var i;
+ var j;
+ var b;
+ var g
+ var r;
+ var radius;
+ var rad;
+ var alpha;
+ var step;
+ var delta;
+ var samplepixels;
+ var p/*ByteArray*/;
+ var pix;
+ var lim;
+
+ if (lengthcount < minpicturebytes) samplefac = 1;
+
+ alphadec = 30 + ((samplefac - 1) / 3);
+ p = thepicture;
+ pix = 0;
+ lim = lengthcount;
+ samplepixels = lengthcount / (3 * samplefac);
+ delta = samplepixels / ncycles;
+ alpha = initalpha;
+ radius = initradius;
+
+ rad = radius >> radiusbiasshift;
+ if (rad <= 1) rad = 0;
+
+ for (i = 0; i < rad; i++) radpower[i] = alpha * (((rad * rad - i * i) * radbias) / (rad * rad));
+
+ if (lengthcount < minpicturebytes) step = 3;
+ else if ((lengthcount % prime1) != 0) step = 3 * prime1;
+ else if ((lengthcount % prime2) != 0) step = 3 * prime2;
+ else if ((lengthcount % prime3) != 0) step = 3 * prime3;
+ else step = 3 * prime4;
+
+ i = 0;
+
+ while (i < samplepixels) {
+ b = (p[pix + 0] & 0xff) << netbiasshift;
+ g = (p[pix + 1] & 0xff) << netbiasshift;
+ r = (p[pix + 2] & 0xff) << netbiasshift;
+ j = contest(b, g, r);
+
+ altersingle(alpha, j, b, g, r);
+
+ if (rad != 0) alterneigh(rad, j, b, g, r); /* alter neighbours */
+
+ pix += step;
+
+ if (pix >= lim) pix -= lengthcount;
+
+ i++;
+
+ if (delta == 0) delta = 1;
+
+ if (i % delta == 0) {
+ alpha -= alpha / alphadec;
+ radius -= radius / radiusdec;
+ rad = radius >> radiusbiasshift;
+
+ if (rad <= 1) rad = 0;
+
+ for (j = 0; j < rad; j++) radpower[j] = alpha * (((rad * rad - j * j) * radbias) / (rad * rad));
+ }
+ }
+ }
+
+
+ /* Save the neural network so we can load it back in on another worker.
+ */
+ var save = exports.save = function(){
+ var data = {
+ netindex: netindex,
+ netsize: netsize,
+ network: network
+ };
+ return data;
+ }
+ var load = exports.load = function(data){
+ netindex = data.netindex;
+ netsize = data.netsize;
+ network = data.network;
+ }
+
+
+ /*
+ ** Search for BGR values 0..255 (after net is unbiased) and return colour
+ * index
+ * ----------------------------------------------------------------------------
+ */
+
+ var map = exports.map = function map(b, g, r) {
+ var i;
+ var j;
+ var dist
+ var a;
+ var bestd;
+ var p;
+ var best;
+
+ bestd = 1000; /* biggest possible dist is 256*3 */
+ best = -1;
+ i = netindex[g]; /* index on g */
+ j = i - 1; /* start at netindex[g] and work outwards */
+
+ while ((i < netsize) || (j >= 0)) {
+ if (i < netsize) {
+ p = network[i];
+ dist = p[1] - g; /* inx key */
+ if (dist >= bestd) i = netsize; /* stop iter */
+ else {
+ i++;
+
+ if (dist < 0) dist = -dist;
+
+ a = p[0] - b;
+
+ if (a < 0) a = -a;
+
+ dist += a;
+
+ if (dist < bestd) {
+ a = p[2] - r;
+
+ if (a < 0) a = -a;
+
+ dist += a;
+
+ if (dist < bestd) {
+ bestd = dist;
+ best = p[3];
+ }
+ }
+ }
+ }
+ if (j >= 0) {
+ p = network[j];
+
+ dist = g - p[1]; /* inx key - reverse dif */
+
+ if (dist >= bestd) j = -1; /* stop iter */
+ else {
+ j--;
+ if (dist < 0) dist = -dist;
+ a = p[0] - b;
+ if (a < 0) a = -a;
+ dist += a;
+
+ if (dist < bestd) {
+ a = p[2] - r;
+ if (a < 0)a = -a;
+ dist += a;
+ if (dist < bestd) {
+ bestd = dist;
+ best = p[3];
+ }
+ }
+ }
+ }
+ }
+ return best;
+ }
+
+ var process = exports.process = function process() {
+ learn();
+ unbiasnet();
+ inxbuild();
+ return colorMap();
+ }
+
+ /*
+ * Unbias network to give byte values 0..255 and record position i to prepare
+ * for sort
+ * -----------------------------------------------------------------------------------
+ */
+
+ var unbiasnet = function unbiasnet() {
+ var i;
+ var j;
+ for (i = 0; i < netsize; i++) {
+ network[i][0] >>= netbiasshift;
+ network[i][1] >>= netbiasshift;
+ network[i][2] >>= netbiasshift;
+ network[i][3] = i; /* record colour no */
+ }
+ }
+
+ /*
+ * Move adjacent neurons by precomputed alpha*(1-((i-j)^2/[r]^2)) in
+ * radpower[|i-j|]
+ * ---------------------------------------------------------------------------------
+ */
+
+ var alterneigh = function alterneigh(rad, i, b, g, r) {
+ var j;
+ var k;
+ var lo;
+ var hi;
+ var a;
+ var m;
+ var p;
+
+ lo = i - rad;
+ if (lo < -1) lo = -1;
+
+ hi = i + rad;
+
+ if (hi > netsize) hi = netsize;
+
+ j = i + 1;
+ k = i - 1;
+ m = 1;
+
+ while ((j < hi) || (k > lo)) {
+ a = radpower[m++];
+ if (j < hi) {
+ p = network[j++];
+
+ try {
+ p[0] -= (a * (p[0] - b)) / alpharadbias;
+ p[1] -= (a * (p[1] - g)) / alpharadbias;
+ p[2] -= (a * (p[2] - r)) / alpharadbias;
+ } catch (e/*Error*/) {} // prevents 1.3 miscompilation
+ }
+
+ if (k > lo) {
+ p = network[k--];
+ try {
+ p[0] -= (a * (p[0] - b)) / alpharadbias;
+ p[1] -= (a * (p[1] - g)) / alpharadbias;
+ p[2] -= (a * (p[2] - r)) / alpharadbias;
+ } catch (e/*Error*/) {}
+ }
+ }
+ }
+
+ /*
+ * Move neuron i towards biased (b,g,r) by factor alpha
+ * ----------------------------------------------------
+ */
+
+ var altersingle = function altersingle(alpha, i, b, g, r) {
+ /* alter hit neuron */
+ var n = network[i];
+ n[0] -= (alpha * (n[0] - b)) / initalpha;
+ n[1] -= (alpha * (n[1] - g)) / initalpha;
+ n[2] -= (alpha * (n[2] - r)) / initalpha;
+ }
+
+ /*
+ * Search for biased BGR values ----------------------------
+ */
+
+ var contest = function contest(b, g, r) {
+ /* finds closest neuron (min dist) and updates freq */
+ /* finds best neuron (min dist-bias) and returns position */
+ /* for frequently chosen neurons, freq[i] is high and bias[i] is negative */
+ /* bias[i] = gamma*((1/netsize)-freq[i]) */
+
+ var i;
+ var dist;
+ var a;
+ var biasdist;
+ var betafreq;
+ var bestpos;
+ var bestbiaspos;
+ var bestd;
+ var bestbiasd;
+ var n;
+
+ bestd = ~(1 << 31);
+ bestbiasd = bestd;
+ bestpos = -1;
+ bestbiaspos = bestpos;
+
+ for (i = 0; i < netsize; i++) {
+ n = network[i];
+ dist = n[0] - b;
+
+ if (dist < 0) dist = -dist;
+
+ a = n[1] - g;
+
+ if (a < 0) a = -a;
+
+ dist += a;
+
+ a = n[2] - r;
+
+ if (a < 0) a = -a;
+
+ dist += a;
+
+ if (dist < bestd) {
+ bestd = dist;
+ bestpos = i;
+ }
+
+ biasdist = dist - ((bias[i]) >> (intbiasshift - netbiasshift));
+
+ if (biasdist < bestbiasd) {
+ bestbiasd = biasdist;
+ bestbiaspos = i;
+ }
+
+ betafreq = (freq[i] >> betashift);
+ freq[i] -= betafreq;
+ bias[i] += (betafreq << gammashift);
+ }
+
+ freq[bestpos] += beta;
+ bias[bestpos] -= betagamma;
+ return (bestbiaspos);
+ }
+
+ NeuQuant.apply(this, arguments);
+ return exports;
+}
+;// importScripts('LZWEncoder.js', 'NeuQuant.js', 'GIFEncoder.js');
+
+self.onmessage = function(event) {
+ var data = event.data;
+ var task = data['task'];
+ switch (task) {
+ case 'encode':
+ encode (data);
+ break;
+ case 'quantize':
+ quantize(data);
+ break;
+ }
+}
+
+function log(msg) {
+ self.postMessage({
+ task: 'message',
+ message: msg
+ });
+}
+
+function quantize (data) {
+ var imageData = data["imageData"];
+ var pixels = discardAlphaChannel( imageData.data );
+
+ var nq = new NeuQuant (pixels, pixels.length, 1);
+ var colortab = nq.process();
+
+ self.postMessage({
+ task: 'quantize',
+ neuquant: nq.save(),
+ colortab: colortab
+ });
+}
+
+function discardAlphaChannel( imageData ) {
+ var pixels = [];
+
+ for ( var i = 0, b = 0, _len = imageData.length; i < _len; b += 4 ) {
+ pixels[i++] = imageData[b];
+ pixels[i++] = imageData[b+1];
+ pixels[i++] = imageData[b+2];
+ }
+ return pixels;
+}
+
+function encode (data) {
+ var frame_index = data["frame_index"];
+ var frame_length = data["frame_length"];
+ var height = data["height"];
+ var width = data["width"];
+ var imageData = data["imageData"];
+ var delay = data["delay"];
+ var neuquant = data["neuquant"];
+ var colortab = data["colortab"];
+
+ // Create a new GIFEncoder for every new worker
+ var encoder = new GIFEncoder();
+ encoder.setRepeat(0); // loop forever
+ encoder.setQuality(1);
+ encoder.setSize(width, height);
+ encoder.setDelay(delay);
+
+ if (frame_index == 0) {
+ encoder.start();
+ }
+ else {
+ encoder.cont();
+ encoder.setProperties(true, false); //started, firstFrame
+ }
+
+ // Load the neural net here because the color table gets clobbered by encoder.start();
+ encoder.setNeuquant(neuquant, colortab);
+ encoder.addFrame(imageData, true);
+
+ if(frame_length == frame_index) {
+ encoder.finish();
+ }
+
+ self.postMessage({
+ task: 'encode',
+ frame_index: frame_index,
+ frame_data: encoder.stream().getData()
+ });
+ // on the page, search for the GIF89a to see the frame_index
+};
+
diff --git a/js/record.concat.js b/js/record.concat.js
new file mode 100644
index 0000000..4a03964
--- /dev/null
+++ b/js/record.concat.js
@@ -0,0 +1,720 @@
+/* FileSaver.js
+ * A saveAs() FileSaver implementation.
+ * 2013-10-21
+ *
+ * By Eli Grey, http://eligrey.com
+ * License: X11/MIT
+ * See LICENSE.md
+ */
+
+/*global self */
+/*jslint bitwise: true, regexp: true, confusion: true, es5: true, vars: true, white: true,
+ plusplus: true */
+
+/*! @source http://purl.eligrey.com/github/FileSaver.js/blob/master/FileSaver.js */
+
+var saveAs = saveAs
+ || (typeof navigator !== 'undefined' && navigator.msSaveOrOpenBlob && navigator.msSaveOrOpenBlob.bind(navigator))
+ || (function(view) {
+ "use strict";
+ var
+ doc = view.document
+ // only get URL when necessary in case BlobBuilder.js hasn't overridden it yet
+ , get_URL = function() {
+ return view.URL || view.webkitURL || view;
+ }
+ , URL = view.URL || view.webkitURL || view
+ , save_link = doc.createElementNS("http://www.w3.org/1999/xhtml", "a")
+ , can_use_save_link = !view.externalHost && "download" in save_link
+ , click = function(node) {
+ var event = doc.createEvent("MouseEvents");
+ event.initMouseEvent(
+ "click", true, false, view, 0, 0, 0, 0, 0
+ , false, false, false, false, 0, null
+ );
+ node.dispatchEvent(event);
+ }
+ , webkit_req_fs = view.webkitRequestFileSystem
+ , req_fs = view.requestFileSystem || webkit_req_fs || view.mozRequestFileSystem
+ , throw_outside = function (ex) {
+ (view.setImmediate || view.setTimeout)(function() {
+ throw ex;
+ }, 0);
+ }
+ , force_saveable_type = "application/octet-stream"
+ , fs_min_size = 0
+ , deletion_queue = []
+ , process_deletion_queue = function() {
+ var i = deletion_queue.length;
+ while (i--) {
+ var file = deletion_queue[i];
+ if (typeof file === "string") { // file is an object URL
+ URL.revokeObjectURL(file);
+ } else { // file is a File
+ file.remove();
+ }
+ }
+ deletion_queue.length = 0; // clear queue
+ }
+ , dispatch = function(filesaver, event_types, event) {
+ event_types = [].concat(event_types);
+ var i = event_types.length;
+ while (i--) {
+ var listener = filesaver["on" + event_types[i]];
+ if (typeof listener === "function") {
+ try {
+ listener.call(filesaver, event || filesaver);
+ } catch (ex) {
+ throw_outside(ex);
+ }
+ }
+ }
+ }
+ , FileSaver = function(blob, name) {
+ // First try a.download, then web filesystem, then object URLs
+ var
+ filesaver = this
+ , type = blob.type
+ , blob_changed = false
+ , object_url
+ , target_view
+ , get_object_url = function() {
+ var object_url = get_URL().createObjectURL(blob);
+ deletion_queue.push(object_url);
+ return object_url;
+ }
+ , dispatch_all = function() {
+ dispatch(filesaver, "writestart progress write writeend".split(" "));
+ }
+ // on any filesys errors revert to saving with object URLs
+ , fs_error = function() {
+ // don't create more object URLs than needed
+ if (blob_changed || !object_url) {
+ object_url = get_object_url(blob);
+ }
+ if (target_view) {
+ target_view.location.href = object_url;
+ } else {
+ window.open(object_url, "_blank");
+ }
+ filesaver.readyState = filesaver.DONE;
+ dispatch_all();
+ }
+ , abortable = function(func) {
+ return function() {
+ if (filesaver.readyState !== filesaver.DONE) {
+ return func.apply(this, arguments);
+ }
+ };
+ }
+ , create_if_not_found = {create: true, exclusive: false}
+ , slice
+ ;
+ filesaver.readyState = filesaver.INIT;
+ if (!name) {
+ name = "download";
+ }
+ if (can_use_save_link) {
+ object_url = get_object_url(blob);
+ // FF for Android has a nasty garbage collection mechanism
+ // that turns all objects that are not pure javascript into 'deadObject'
+ // this means `doc` and `save_link` are unusable and need to be recreated
+ // `view` is usable though:
+ doc = view.document;
+ save_link = doc.createElementNS("http://www.w3.org/1999/xhtml", "a");
+ save_link.href = object_url;
+ save_link.download = name;
+ var event = doc.createEvent("MouseEvents");
+ event.initMouseEvent(
+ "click", true, false, view, 0, 0, 0, 0, 0
+ , false, false, false, false, 0, null
+ );
+ save_link.dispatchEvent(event);
+ filesaver.readyState = filesaver.DONE;
+ dispatch_all();
+ return;
+ }
+ // Object and web filesystem URLs have a problem saving in Google Chrome when
+ // viewed in a tab, so I force save with application/octet-stream
+ // http://code.google.com/p/chromium/issues/detail?id=91158
+ if (view.chrome && type && type !== force_saveable_type) {
+ slice = blob.slice || blob.webkitSlice;
+ blob = slice.call(blob, 0, blob.size, force_saveable_type);
+ blob_changed = true;
+ }
+ // Since I can't be sure that the guessed media type will trigger a download
+ // in WebKit, I append .download to the filename.
+ // https://bugs.webkit.org/show_bug.cgi?id=65440
+ if (webkit_req_fs && name !== "download") {
+ name += ".download";
+ }
+ if (type === force_saveable_type || webkit_req_fs) {
+ target_view = view;
+ }
+ if (!req_fs) {
+ fs_error();
+ return;
+ }
+ fs_min_size += blob.size;
+ req_fs(view.TEMPORARY, fs_min_size, abortable(function(fs) {
+ fs.root.getDirectory("saved", create_if_not_found, abortable(function(dir) {
+ var save = function() {
+ dir.getFile(name, create_if_not_found, abortable(function(file) {
+ file.createWriter(abortable(function(writer) {
+ writer.onwriteend = function(event) {
+ target_view.location.href = file.toURL();
+ deletion_queue.push(file);
+ filesaver.readyState = filesaver.DONE;
+ dispatch(filesaver, "writeend", event);
+ };
+ writer.onerror = function() {
+ var error = writer.error;
+ if (error.code !== error.ABORT_ERR) {
+ fs_error();
+ }
+ };
+ "writestart progress write abort".split(" ").forEach(function(event) {
+ writer["on" + event] = filesaver["on" + event];
+ });
+ writer.write(blob);
+ filesaver.abort = function() {
+ writer.abort();
+ filesaver.readyState = filesaver.DONE;
+ };
+ filesaver.readyState = filesaver.WRITING;
+ }), fs_error);
+ }), fs_error);
+ };
+ dir.getFile(name, {create: false}, abortable(function(file) {
+ // delete file if it already exists
+ file.remove();
+ save();
+ }), abortable(function(ex) {
+ if (ex.code === ex.NOT_FOUND_ERR) {
+ save();
+ } else {
+ fs_error();
+ }
+ }));
+ }), fs_error);
+ }), fs_error);
+ }
+ , FS_proto = FileSaver.prototype
+ , saveAs = function(blob, name) {
+ return new FileSaver(blob, name);
+ }
+ ;
+ FS_proto.abort = function() {
+ var filesaver = this;
+ filesaver.readyState = filesaver.DONE;
+ dispatch(filesaver, "abort");
+ };
+ FS_proto.readyState = FS_proto.INIT = 0;
+ FS_proto.WRITING = 1;
+ FS_proto.DONE = 2;
+
+ FS_proto.error =
+ FS_proto.onwritestart =
+ FS_proto.onprogress =
+ FS_proto.onwrite =
+ FS_proto.onabort =
+ FS_proto.onerror =
+ FS_proto.onwriteend =
+ null;
+
+ view.addEventListener("unload", process_deletion_queue, false);
+ return saveAs;
+}(this.self || this.window || this.content));
+// `self` is undefined in Firefox for Android content script context
+// while `this` is nsIContentFrameMessageManager
+// with an attribute `content` that corresponds to the window
+
+if (typeof module !== 'undefined') module.exports = saveAs;
+;window.dataUriToBlob = (function(){
+/**
+ * Blob constructor.
+ */
+
+var Blob = window.Blob;
+
+/**
+ * ArrayBufferView support.
+ */
+
+var hasArrayBufferView = new Blob([new Uint8Array(100)]).size == 100;
+
+/**
+ * Return a `Blob` for the given data `uri`.
+ *
+ * @param {String} uri
+ * @return {Blob}
+ * @api public
+ */
+
+var dataUriToBlob = function(uri){
+ var data = uri.split(',')[1];
+ var bytes = atob(data);
+ var buf = new ArrayBuffer(bytes.length);
+ var arr = new Uint8Array(buf);
+ for (var i = 0; i < bytes.length; i++) {
+ arr[i] = bytes.charCodeAt(i);
+ }
+
+ if (!hasArrayBufferView) arr = buf;
+ var blob = new Blob([arr], { type: mime(uri) });
+ blob.slice = blob.slice || blob.webkitSlice;
+ return blob;
+};
+
+/**
+ * Return data uri mime type.
+ */
+
+function mime(uri) {
+ return uri.split(';')[0].slice(5);
+}
+
+return dataUriToBlob;
+
+})()
+;// 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 width = 0;
+ var height = 0;
+ var frames_done = 0;
+
+ 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(){
+ resetFrames()
+ neuquant = null;
+ colortab = null;
+ base.quantized = false
+ }
+ var resetFrames = this.resetFrames = function(){
+ canvases = [];
+ contexts = [];
+ frames = [];
+ delays = [];
+ width = 0;
+ height = 0;
+ frames_done = 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 addFrames = this.addFrames = function(canvas_array, delay){
+ for (var i = 0; i < canvas_array.length; i++) {
+ var canvas = canvas_array[i]
+ var ctx = canvas.getContext('2d');
+ canvases.push(canvas);
+ contexts.push(ctx);
+ delays.push(delay);
+ }
+
+ if (canvases.length == canvas_array.length) {
+ width = canvas_array[0].width;
+ height = canvas_array[0].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('js/vendor/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) {
+ if (! canvases.length) {
+ throw Error ("No frames to encode")
+ }
+ nq = nq || neuquant
+ ct = ct || colortab
+
+ started = Date.now();
+ frames_done = 0;
+
+ 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("done_sending")
+ }
+ sendWork();
+ }
+
+ function receiveEncode(e){
+ var frame_index = e.data["frame_index"];
+ var frame_data = e.data["frame_data"];
+
+ frames[frame_index] = frame_data;
+
+ base.tube("encoded-frame", frames.length, canvases.length)
+ 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;
+ }
+
+}
+;(function(){
+ var canvases = document.getElementsByTagName("canvas")
+ if (canvases.length == 0) { alert("no canvas found"); return; }
+
+ var source = canvases[0]
+
+ var encoder = new GifEncoder()
+ encoder.on("encoded-frame", encoded_frame)
+ encoder.on("rendered", rendered_bytes)
+ encoder.on("rendered-url", rendered_url)
+
+ var w, h, x, y;
+ var last_t, frame_t, count, delay, done;
+ var frames = []
+ var curtain, outline
+ var dragging = false
+ var lastGif
+
+ init()
+ function init(){
+ document.body.style.width = "100%"
+ document.body.style.height = "100%"
+ document.body.parentNode.style.width = "100%"
+ document.body.parentNode.style.height = "100%"
+ var template = document.getElementById("template").innerHTML
+ var el = document.createElement("div")
+ el.innerHTML = template
+ document.body.appendChild(el)
+ bind()
+ }
+ function bind(){
+ curtain = document.getElementById("curtain")
+ outline = document.getElementById("outline")
+ controls = document.getElementById("outline")
+ document.getElementById("record").addEventListener("click", record, false)
+ document.getElementById("save").addEventListener("click", save, false)
+ curtain.addEventListener("mousedown", box_start, false)
+ curtain.addEventListener("mousemove", box_size, false)
+ curtain.addEventListener("mouseup", box_end, false)
+ outline.style.display = "none"
+ controls.style.display = "none"
+ }
+ function box_start(e){
+ x = e.pageX
+ y = e.pageY
+ w = 1
+ h = 1
+ dragging = true
+ outline.style.left = px(x-1)
+ outline.style.top = px(y-1)
+ outline.style.width = px(w)
+ outline.style.height = px(h)
+ outline.style.display = "block"
+ }
+ function box_size(e){
+ if (! dragging) return
+ w = e.pageX - x
+ h = e.pageY - y
+ outline.style.width = px(w)
+ outline.style.height = px(h)
+ }
+ function box_end(e){
+ dragging = false
+ controls.style.display = "block"
+ enable("record")
+ document.getElementById("record").focus()
+ }
+ function enable(id){ document.getElementById(id).removeAttribute("disabled") }
+ function disable(id){ document.getElementById(id).setAttribute("disabled","disabled") }
+ function px(n){ return n + "px" }
+ function record(){
+ count = parseInt(document.getElementById("framecount").value)
+ delay = parseFloat(document.getElementById("framedelay").value) * 1000
+ done = 0
+ frame_t = 0
+ build()
+ capture()
+ last_t = +new Date()
+ requestAnimationFrame(recordloop)
+ status("recording")
+ disable("record")
+ }
+ function recordloop(){
+ var canvas = document.createElement("canvas")
+ var t = +new Date()
+ frame_t += t - last_t
+ last_t = t
+ if (frame_t > delay) {
+ frame_t -= delay
+ capture()
+ }
+ if (done == count) {
+ render()
+ }
+ else {
+ requestAnimationFrame(recordloop)
+ }
+ }
+ function build(){
+ frames = new Array(count)
+ for (var i = 0; i < count; i++){
+ frames[i] = document.createElement("canvas")
+ frames[i].height = h
+ frames[i].width = w
+ }
+ }
+ function capture(){
+ var frame = frames[done++]
+ var ctx = frame.getContext('2d')
+ ctx.fillStyle = document.body.backgroundColor
+ ctx.fillRect(0,0,w,h)
+ ctx.drawImage(source, x, y, w, h, 0, 0, w, h)
+ }
+ function render(){
+ encoder.reset()
+ encoder.addFrames(frames, delay)
+ status("encoding")
+ try {
+ encoder.encode()
+ }
+ catch (e) {
+ rendering = false
+ status(e)
+ throw e
+ }
+ }
+ function status(s){
+ document.getElementById("status").innerHTML = s
+ }
+ function encoded_frame(done,count){
+ status("encoded " + done + " / " + count)
+ }
+ function rendered_bytes(bytes){
+ status(filesize(bytes.length))
+ }
+ function rendered_url(url){
+ var image = new Image ()
+ lastGif = image.src = url
+ document.getElementById("preview").innerHTML = ""
+ document.getElementById("preview").appendChild(image)
+ rendering = false
+ enable("record")
+ enable("save")
+ }
+ function save (){
+ if (! lastGif) return;
+ var filename = (window.location.host + window.location.pathname).replace(/[^a-zA-Z0-9]/g,"-").replace(/-+/,"-")
+ var blob = dataUriToBlob(lastGif)
+ saveAs(blob, filename + "-" + (+new Date()) + ".gif");
+ }
+ function filesize(n) {
+ if (n < 1e3) return n + " bytes"
+ if (n < 1e6) return decimalString(n/1e3) + " kb"
+ if (n < 1e9) return decimalString(n/1e6) + " mb"
+ return "WAY TOO BIG DUDE"
+ }
+ function decimalString(n){
+ var m = Math.floor(n);
+ return m + "." + Math.round((n-m)*10)
+ }
+})()
+
diff --git a/js/record.min.js b/js/record.min.js
new file mode 100644
index 0000000..6644460
--- /dev/null
+++ b/js/record.min.js
@@ -0,0 +1,2 @@
+/* asdf.us/dither */
+function GifEncoder(){function a(){var a=this,b=0,c=[];a.init=function(){for(var b=0;WORKERS>b;b++){var d=new Worker("js/vendor/gif-encode/worker.js");d.onmessage=a.receiveWork,c.push(d)}};var d={};a.hire=function(a,b){d[a]=b},a.work=function(a){c[++b%c.length].postMessage(a)},a.receiveWork=function(a){a.data.task in d&&d[a.data.task](a)},a.init()}function b(a){console.log("[WORKER]",a.data.message)}function c(a){console.log(Date.now()-q,"quantization done"),i=a.data.neuquant,j=a.data.colortab,f.quantized=!0,f.tube("quantized")}function d(a){var b=a.data.frame_index,c=a.data.frame_data;m[b]=c,f.tube("encoded-frame",m.length,k.length);for(var d=0;d<k.length;d++)if(null==m[d])return;console.log("FINISHED "+k.length);var e=m.join(""),g=window.btoa(e),h="data:image/gif;base64,"+g;f.working=!1,f.tube("rendered",e),f.tube("rendered-url",h),console.log(Date.now()-q,"processed frames"),console.log(Date.now()-p,"done")}function e(a){var b=Date.now();a=Math.min(l.length,a);var c=document.createElement("canvas"),d=c.getContext("2d");c.width=g,c.height=h*a;for(var e=d.getImageData(0,0,c.width,c.height),f=e.data,i=0,j=sample(l,4);a--;)for(var k=j[a],m=k.getImageData(0,0,g,h).data,n=0;n<m.length;i++,n++)f[i]=m[n];return console.log(Date.now()-b,"built spritesheet"),e}var f=this;this.working=!1;var g,h,i,j,k=[],l=[],m=[],n=[],g=0,h=0,o=0,p=Date.now(),q=Date.now(),r=(f.tube=new Tube,new a);r.hire("message",b),r.hire("quantize",c),r.hire("encode",d);var s=(this.reset=function(){s(),i=null,j=null,f.quantized=!1},this.resetFrames=function(){k=[],l=[],m=[],n=[],g=0,h=0,o=0});this.on=function(){f.tube.on.apply(f.tube,arguments)},this.off=function(){f.tube.off.apply(f.tube,arguments)};{var i,j;this.addFrame=function(a,b){var c=a.getContext("2d");k.push(a),l.push(c),n.push(b),1==k.length&&(g=a.width,h=a.height)},this.addFrames=function(a,b){for(var c=0;c<a.length;c++){var d=a[c],e=d.getContext("2d");k.push(d),l.push(e),n.push(b)}k.length==a.length&&(g=a[0].width,h=a[0].height)},this.copyFrame=function(a,b){var c=document.createElement("canvas"),d=c.getContext("2d");d.drawImage(a,0,0,a.width,a.height),k.push(c),l.push(d),n.push(b),1==k.length&&(g=a.width,h=a.height)},this.quantize=function(){p=Date.now(),q=Date.now();var a=e(FRAMES_TO_QUANTIZE);r.work({task:"quantize",imageData:a})},this.encode=function(a,b){function c(){if(e==k.length)return d();var a=l[e],b=a.getImageData(0,0,g,h).data,f=n[e];r.work({task:"encode",frame_index:e,frame_length:l.length-1,height:h,width:g,delay:f,imageData:b,neuquant:i,colortab:j}),e++,setTimeout(c,16)}function d(){f.tube("done_sending")}if(!k.length)throw Error("No frames to encode");a=a||i,b=b||j,q=Date.now(),o=0,console.log("working .... 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