Function JPEGEncoder

static/webuploader/webuploader.js:5573–6269

(quality)

        */
    
        function JPEGEncoder(quality) {
          var self = this;
            var fround = Math.round;
            var ffloor = Math.floor;
            var YTable = new Array(64);
            var UVTable = new Array(64);
            var fdtbl_Y = new Array(64);
            var fdtbl_UV = new Array(64);
            var YDC_HT;
            var UVDC_HT;
            var YAC_HT;
            var UVAC_HT;
    
            var bitcode = new Array(65535);
            var category = new Array(65535);
            var outputfDCTQuant = new Array(64);
            var DU = new Array(64);
            var byteout = [];
            var bytenew = 0;
            var bytepos = 7;
    
            var YDU = new Array(64);
            var UDU = new Array(64);
            var VDU = new Array(64);
            var clt = new Array(256);
            var RGB_YUV_TABLE = new Array(2048);
            var currentQuality;
    
            var ZigZag = [
                     0, 1, 5, 6,14,15,27,28,
                     2, 4, 7,13,16,26,29,42,
                     3, 8,12,17,25,30,41,43,
                     9,11,18,24,31,40,44,53,
                    10,19,23,32,39,45,52,54,
                    20,22,33,38,46,51,55,60,
                    21,34,37,47,50,56,59,61,
                    35,36,48,49,57,58,62,63
                ];
    
            var std_dc_luminance_nrcodes = [0,0,1,5,1,1,1,1,1,1,0,0,0,0,0,0,0];
            var std_dc_luminance_values = [0,1,2,3,4,5,6,7,8,9,10,11];
            var std_ac_luminance_nrcodes = [0,0,2,1,3,3,2,4,3,5,5,4,4,0,0,1,0x7d];
            var std_ac_luminance_values = [
                    0x01,0x02,0x03,0x00,0x04,0x11,0x05,0x12,
                    0x21,0x31,0x41,0x06,0x13,0x51,0x61,0x07,
                    0x22,0x71,0x14,0x32,0x81,0x91,0xa1,0x08,
                    0x23,0x42,0xb1,0xc1,0x15,0x52,0xd1,0xf0,
                    0x24,0x33,0x62,0x72,0x82,0x09,0x0a,0x16,
                    0x17,0x18,0x19,0x1a,0x25,0x26,0x27,0x28,
                    0x29,0x2a,0x34,0x35,0x36,0x37,0x38,0x39,
                    0x3a,0x43,0x44,0x45,0x46,0x47,0x48,0x49,
                    0x4a,0x53,0x54,0x55,0x56,0x57,0x58,0x59,
                    0x5a,0x63,0x64,0x65,0x66,0x67,0x68,0x69,
                    0x6a,0x73,0x74,0x75,0x76,0x77,0x78,0x79,
                    0x7a,0x83,0x84,0x85,0x86,0x87,0x88,0x89,
                    0x8a,0x92,0x93,0x94,0x95,0x96,0x97,0x98,
                    0x99,0x9a,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7,
                    0xa8,0xa9,0xaa,0xb2,0xb3,0xb4,0xb5,0xb6,