/*! JpegCamera 1.1.3 | 2013-08-09
    (c) 2013 Adam Wrobel
    http://amw.github.io/jpeg_camera */
!function(){var a,b,c,d,e,f={}.hasOwnProperty,g=function(a,b){function c(){this.constructor=a}for(var d in b)f.call(b,d)&&(a[d]=b[d]);return c.prototype=b.prototype,a.prototype=new c,a.__super__=b.prototype,a};a=function(){function a(a,b){if("string"==typeof a&&(a=document.getElementById(a.replace("#",""))),!a||!a.offsetWidth)throw"JpegCamera: invalid container";a.innerHTML="",this.view_width=parseInt(a.offsetWidth,10),this.view_height=parseInt(a.offsetHeight,10),this.container=document.createElement("div"),this.container.style.width="100%",this.container.style.height="100%",this.container.style.position="relative",a.appendChild(this.container),this.options=this._extend({},this.constructor.DefaultOptions,b),this._engine_init()}return a.DefaultOptions={shutter_url:"/jpeg_camera/shutter.mp3",swf_url:"/jpeg_camera/jpeg_camera.swf",on_debug:function(a){return console&&console.log?console.log("JpegCamera: "+a):void 0},quality:.9,shutter:!0,mirror:!1,timeout:0,retry_success:!1},a._canvas_supported=!!document.createElement("canvas").getContext,a.canvas_supported=function(){return this._canvas_supported},a.prototype.ready=function(a){return this.options.on_ready=a,this.options.on_ready&&this._is_ready&&this.options.on_ready.call(this),this},a.prototype._is_ready=!1,a.prototype.error=function(a){return this.options.on_error=a,this.options.on_error&&this._error_occured&&this.options.on_error.call(this,this._error_occured),this},a.prototype._error_occured=!1,a.StatsCaptureScale=.2,a.prototype.get_stats=function(b){var d,e;return d=new c(this,{}),this._engine_capture(d,!1,.1,a.StatsCaptureScale),e=this,d.get_stats(function(a){return b.call(e,a)})},a.prototype.capture=function(a){var b,d;return null==a&&(a={}),b=new c(this,a),this._snapshots[b.id]=b,d=b._options(),d.shutter&&this._engine_play_shutter_sound(),this._engine_capture(b,d.mirror,d.quality,1),b},a.prototype._snapshots={},a.prototype.show_stream=function(){return this._engine_show_stream(),this._displayed_snapshot=null,this},a.prototype.discard_all=function(){var a,b,c;this._displayed_snapshot&&this.show_stream(),c=this._snapshots;for(a in c)b=c[a],this._engine_discard(b),b._discarded=!0;return this._snapshots={},this},a.prototype._extend=function(a){var b,c,d,e,f,g;for(d=Array.prototype.slice.call(arguments,1),f=0,g=d.length;g>f;f++)if(c=d[f])for(b in c)e=c[b],a[b]=e;return a},a.prototype._debug=function(a){return this.options.on_debug?this.options.on_debug.call(this,a):void 0},a.prototype._display=function(a){return this._engine_display(a),this._displayed_snapshot=a},a.prototype._displayed_snapshot=null,a.prototype._discard=function(a){return this._displayed_snapshot===a&&this.show_stream(),this._engine_discard(a),a._discarded=!0,delete this._snapshots[a.id]},a.prototype._prepared=function(){var a;return a=this,setTimeout(function(){return a._wait_until_stream_looks_ok(!0)},1)},a.prototype._wait_until_stream_looks_ok=function(a){return this.get_stats(function(b){var c;return b.std>2?(this._debug("Stream mean gray value = "+b.mean+" standard deviation = "+b.std),this._debug("Camera is ready"),this._is_ready=!0,this.options.on_ready?this.options.on_ready.call(this):void 0):(a&&this._debug("Stream mean gray value = "+b.mean+" standard deviation = "+b.std),c=this,setTimeout(function(){return c._wait_until_stream_looks_ok(!1)},100))})},a.prototype._got_error=function(a){return this._debug("Error - "+a),this._error_occured=a,this.options.on_error?this.options.on_error.call(this,this._error_occured):void 0},a.prototype._block_element_access=function(){return this._overlay=document.createElement("div"),this._overlay.style.width="100%",this._overlay.style.height="100%",this._overlay.style.position="absolute",this._overlay.style.top=0,this._overlay.style.left=0,this._overlay.style.zIndex=2,this.container.appendChild(this._overlay)},a.prototype._overlay=null,a.prototype.view_width=null,a.prototype.view_height=null,a._add_prefixed_style=function(a,b,c){var d;return d=b.charAt(0).toUpperCase()+b.slice(1),a.style[b]=c,a.style["Webkit"+d]=c,a.style["Moz"+d]=c,a.style["ms"+d]=c,a.style["O"+d]=c},a}(),navigator.getUserMedia||(navigator.getUserMedia=navigator.webkitGetUserMedia||navigator.mozGetUserMedia||navigator.msGetUserMedia),d=function(){var a;if(a=document.createElement("canvas"),a.getContext&&!a.toBlob)throw"JpegCamera: Canvas-to-Blob is not loaded"},navigator.getUserMedia&&(d(),b=function(b){function c(){return e=c.__super__.constructor.apply(this,arguments)}return g(c,b),c.prototype._engine_init=function(){var b,c,d,e,f,g,h;this._debug("Using HTML5 engine"),h=Math.floor(.2*this.view_height),e=Math.floor(.2*this.view_width),this.message=document.createElement("div"),this.message["class"]="message",this.message.style.width="100%",this.message.style.height="100%",a._add_prefixed_style(this.message,"boxSizing","border-box"),this.message.style.overflow="hidden",this.message.style.textAlign="center",this.message.style.paddingTop=""+h+"px",this.message.style.paddingBottom=""+h+"px",this.message.style.paddingLeft=""+e+"px",this.message.style.paddingRight=""+e+"px",this.message.style.position="absolute",this.message.style.zIndex=3,this.message.innerHTML="Please allow camera access when prompted by the browser.<br><br>Look for camera icon around your address bar.",this.container.appendChild(this.message),this.video_container=document.createElement("div"),this.video_container.style.width=""+this.view_width+"px",this.video_container.style.height=""+this.view_height+"px",this.video_container.style.overflow="hidden",this.video_container.style.position="absolute",this.video_container.style.zIndex=1,this.container.appendChild(this.video_container),this.video=document.createElement("video"),this.video.autoplay=!0,a._add_prefixed_style(this.video,"transform","scalex(-1.0)"),window.AudioContext||(window.AudioContext=window.webkitAudioContext),window.AudioContext&&this._load_shutter_sound(),d={video:{optional:[{minWidth:1280},{minWidth:640},{minWidth:480},{minWidth:360}]}},g=this,f=function(a){return g._remove_message(),g.video.src=window.URL?URL.createObjectURL(a):a,g._block_element_access(),g._wait_for_video_ready()},c=function(a){var b,c,d;g.message.innerHTML='<span style="color: red;">You have denied camera access.</span><br><br>Look for camera icon around your address bar to change your decision.',b=a.code;for(c in a)if(d=a[c],"code"!==c)return g._got_error(c),void 0;return g._got_error("UNKNOWN ERROR")};try{return navigator.getUserMedia(d,f,c)}catch(i){return b=i,navigator.getUserMedia("video",f,c)}},c.prototype._engine_play_shutter_sound=function(){var a;if(this.shutter_buffer)return a=this.audio_context.createBufferSource(),a.buffer=this.shutter_buffer,a.connect(this.audio_context.destination),a.start(0)},c.prototype._engine_capture=function(a,b,c,d){var e,f,g;return g=this._get_capture_crop(),e=document.createElement("canvas"),e.width=Math.round(g.width*d),e.height=Math.round(g.height*d),f=e.getContext("2d"),f.drawImage(this.video,g.x_offset,g.y_offset,g.width,g.height,0,0,Math.round(g.width*d),Math.round(g.height*d)),a._canvas=e,a._mirror=b,a._quality=c},c.prototype._engine_display=function(b){return this.displayed_canvas&&this.container.removeChild(this.displayed_canvas),this.displayed_canvas=b._canvas,this.displayed_canvas.style.width=""+this.view_width+"px",this.displayed_canvas.style.height=""+this.view_height+"px",this.displayed_canvas.style.top=0,this.displayed_canvas.style.left=0,this.displayed_canvas.style.position="absolute",this.displayed_canvas.style.zIndex=2,a._add_prefixed_style(this.displayed_canvas,"transform","scalex(-1.0)"),this.container.appendChild(this.displayed_canvas)},c.prototype._engine_get_canvas=function(a){var b,c;return b=document.createElement("canvas"),b.width=a._canvas.width,b.height=a._canvas.height,c=b.getContext("2d"),c.drawImage(a._canvas,0,0),b},c.prototype._engine_get_image_data=function(a){var b,c;return b=a._canvas,c=b.getContext("2d"),c.getImageData(0,0,b.width,b.height)},c.prototype._engine_discard=function(a){return a._xhr&&a._xhr.abort(),delete a._xhr,delete a._canvas,delete a._jpeg_blob},c.prototype._engine_show_stream=function(){return this.displayed_canvas&&(this.container.removeChild(this.displayed_canvas),this.displayed_canvas=null),this.video_container.style.display="block"},c.prototype._engine_upload=function(a,b,c,d){var e,f,g,h,i;return h=this,a._jpeg_blob?(this._debug("Uploading the file"),g=function(b){return delete a._xhr,a._status=b.target.status,a._response=b.target.responseText,a._status>=200&&a._status<300?a._upload_done():(a._error_message=b.target.statusText||"Unknown error",a._upload_fail())},i=new XMLHttpRequest,i.open("POST",b),i.timeout=d,c&&i.setRequestHeader("X-CSRF-Token",c),i.onload=g,i.onerror=g,i.onabort=g,i.send(a._jpeg_blob),a._xhr=i):(this._debug("Generating JPEG file"),a._mirror?(e=document.createElement("canvas"),e.width=a._canvas.width,e.height=a._canvas.height,f=e.getContext("2d"),f.setTransform(1,0,0,1,0,0),f.translate(e.width,0),f.scale(-1,1),f.drawImage(a._canvas,0,0)):e=a._canvas,e.toBlob(function(e){return a._jpeg_blob=e,h._engine_upload(a,b,c,d)},"image/jpeg",this.quality))},c.prototype._remove_message=function(){return this.message.style.display="none"},c.prototype._load_shutter_sound=function(){var a,b;if(!this.audio_context)return this.audio_context=new AudioContext,a=new XMLHttpRequest,a.open("GET",this.options.shutter_url,!0),a.responseType="arraybuffer",b=this,a.onload=function(){return b.audio_context.decodeAudioData(a.response,function(a){return b.shutter_buffer=a})},a.send()},c.prototype._wait_for_video_ready=function(){var a,b,c,d;return d=parseInt(this.video.videoWidth),c=parseInt(this.video.videoHeight),d>0&&c>0?(this.video_container.appendChild(this.video),this.video_width=d,this.video_height=c,this._debug("Camera resolution "+this.video_width+"x"+this.video_height+"px"),a=this._get_video_crop(),this.video.style.position="relative",this.video.style.width=""+a.width+"px",this.video.style.height=""+a.height+"px",this.video.style.left=""+a.x_offset+"px",this.video.style.top=""+a.y_offset+"px",this._prepared()):this._status_checks_count>100?this._got_error("Camera failed to initialize in 10 seconds"):(this._status_checks_count++,b=this,setTimeout(function(){return b._wait_for_video_ready()},100))},c.prototype._status_checks_count=0,c.prototype._get_video_crop=function(){var a,b,c,d,e;return c=this.video_width/this.video_height,e=this.view_width/this.view_height,c>=e?(this._debug("Filling height"),d=this.view_height/this.video_height,b=Math.round(this.video_width*d),{width:b,height:this.view_height,x_offset:-Math.floor((b-this.view_width)/2),y_offset:0}):(this._debug("Filling width"),d=this.view_width/this.video_width,a=Math.round(this.video_height*d),{width:this.view_width,height:a,x_offset:0,y_offset:-Math.floor((a-this.view_height)/2)})},c.prototype._get_capture_crop=function(){var a,b,c,d;return c=this.video_width/this.video_height,d=this.view_width/this.view_height,c>=d?(b=Math.round(this.video_height*d),{width:b,height:this.video_height,x_offset:Math.floor((this.video_width-b)/2),y_offset:0}):(a=Math.round(this.video_width/d),{width:this.video_width,height:a,x_offset:0,y_offset:Math.floor((this.video_height-a)/2)})},c}(a),window.JpegCamera=b),c=function(){function b(a,b){this.camera=a,this.options=b,this.id=this.constructor._next_snapshot_id++}return b._next_snapshot_id=1,b.prototype._discarded=!1,b.prototype.show=function(){return this._discarded&&raise("discarded snapshot cannot be used"),this.camera._display(this),this},b.prototype.hide=function(){return this.camera.displayed_snapshot()===this&&this.camera.show_stream(),this},b.prototype.get_stats=function(a){return this._discarded&&raise("discarded snapshot cannot be used"),this.get_image_data(function(b){return this._get_stats(b,a)})},b.prototype.get_canvas=function(b){var c;return this._discarded&&raise("discarded snapshot cannot be used"),!a._canvas_supported,c=this,setTimeout(function(){return c._extra_canvas||(c._extra_canvas=c.camera._engine_get_canvas(c)),a._add_prefixed_style(c._extra_canvas,"transform","scalex(-1.0)"),b.call(c,c._extra_canvas)},10),!0},b.prototype._extra_canvas=null,b.prototype.get_image_data=function(a){var b;return this._discarded&&raise("discarded snapshot cannot be used"),b=this,setTimeout(function(){return b._image_data||(b._image_data=b.camera._engine_get_image_data(b)),a.call(b,b._image_data)},5)},b.prototype._image_data=null,b.prototype.upload=function(a){var b;if(null==a&&(a={}),this._discarded&&raise("discarded snapshot cannot be used"),this._uploading)return this.camera._debug("Upload already in progress"),void 0;if(this._uploading=!0,this._retry=1,this._upload_options=a,b=this._options(),!b.api_url)throw this.camera._debug("Snapshot#upload called without valid api_url"),"Snapshot#upload called without valid api_url";return this._start_upload(b),this},b.prototype._upload_options={},b.prototype._uploading=!1,b.prototype._retry=1,b.prototype.done=function(a){var b;return this._discarded&&raise("discarded snapshot cannot be used"),this._upload_options.on_upload_done=a,b=this._options(),b.on_upload_done&&this._done&&b.on_upload_done.call(this,this._response),this},b.prototype._done=!1,b.prototype._response=null,b.prototype.fail=function(a){var b;return this._discarded&&raise("discarded snapshot cannot be used"),this._upload_options.on_upload_fail=a,b=this._options(),b.on_upload_fail&&this._fail&&b.on_upload_fail.call(this,this._status,this._error_message,this._response),this},b.prototype._fail=!1,b.prototype._status=null,b.prototype._error_message=null,b.prototype.discard=function(){return this.camera._discard(this),void 0},b.prototype._options=function(){return this.camera._extend({},this.camera.options,this.options,this._upload_options)},b.prototype._start_upload=function(a){var b;return b="string"==typeof a.csrf_token&&a.csrf_token.length>0?a.csrf_token:null,this._done=!1,this._response=null,this._fail=!1,this._status=null,this._error_message=null,this.camera._engine_upload(this,a.api_url,b,a.timeout)},b.prototype._get_stats=function(a,b){var c,d,e,f,g,h,i,j,k,l,m;if(!this._stats){for(h=a.width*a.height,i=0,d=new Array(h),e=k=0;h>k;e=k+=1)f=4*e,c=.2126*a.data[f+0]+.7152*a.data[f+1]+.0722*a.data[f+2],c=Math.round(c),i+=c,d[e]=c;for(g=Math.round(i/h),j=0,l=0,m=d.length;m>l;l++)c=d[l],j+=Math.pow(c-g,2);this._stats={mean:g,std:Math.round(Math.sqrt(j/h))}}return b.call(this,this._stats)},b.prototype._stats=null,b.prototype._upload_done=function(){var a,b,c,d;return this.camera._debug("Upload completed with status "+this._status),this._done=!0,a=this._options(),c=a.retry_success&&a.retry_if&&a.retry_if.call(this,this._status,this._error_message,this._response,this._retry),!0===c&&(c=0),"number"==typeof c?(this._retry++,c>0?(b=parseInt(c),this.camera._debug("Will retry the upload in "+b+"ms (attempt #"+this._retry+")"),d=this,setTimeout(function(){return d._start_upload(a)},b)):(this.camera._debug("Will retry the upload immediately (attempt #"+this._retry+")"),this._start_upload(a))):(this._uploading=!1,a.on_upload_done?a.on_upload_done.call(this,this._response):void 0)},b.prototype._upload_fail=function(){var a,b,c,d;return this.camera._debug("Upload failed with status "+this._status),this._fail=!0,a=this._options(),c=a.retry_if&&a.retry_if.call(this,this._status,this._error_message,this._response,this._retry),!0===c&&(c=0),"number"==typeof c?(this._retry++,c>0?(b=parseInt(c),this.camera._debug("Will retry the upload in "+b+"ms (attempt #"+this._retry+")"),d=this,setTimeout(function(){return d._start_upload(a)},b)):(this.camera._debug("Will retry the upload immediately (attempt #"+this._retry+")"),this._start_upload(a))):(this._uploading=!1,a.on_upload_fail?a.on_upload_fail.call(this,this._status,this._error_message,this._response):void 0)},b}()}.call(this);