source: Dev/trunk/src/client/dojox/av/_Media.js

define(['dojo'],function(dojo){

        dojo.experimental("dojox.av.FLVideo");

        return dojo.declare("dojox.av._Media", null, {
                // summary:
                //              Used as a mixin for dojox and AIR media
                // description:
                //              Calculates the current status of the playing media and fires
                //              the appropriate events.

                mediaUrl:"",

                // initialVolume: Float?
                //              The initial volume setting of the player. Acccepts between 0 and 1.
                initialVolume:1,

                // autoPlay:Boolean?
                //              Whether the video automatically plays on load or not.
                autoPlay: false,

                // bufferTime: Number?
                //              Time in milliseconds that the video should be loaded before it will
                //              play. May pause and resume to build up buffer. Prevents stuttering.
                //
                //              Note: Older FLVs, without a duration, cannot be buffered.
                bufferTime: 2000,

                // minBufferTime: Number
                //              Time in milliseconds between the playhead time and loaded time that
                //              will trigger the buffer. When buffer is triggered, video will pause
                //              until the bufferTime amount is buffered.
                //              Note: Should be a small number, greater than zero.
                minBufferTime:300,

                // updateTime: Number
                //              How often, in milliseconds to get an update of the video position.
                updateTime: 100,

                // id: String?
                //              The id of this widget and the id of the SWF movie.
                id:"",

                // isDebug: Boolean?
                //              Setting to true tells the SWF to output log messages to Firebug.
                isDebug: false,

                // percentDownloaded: read-only-Number
                //              The percentage the media has downloaded; from 0-100
                percentDownloaded:0,

                // _flashObject: read-only-Object
                //      The dojox.embed object
                _flashObject:null,

                // flashMedia: read-only-SWF
                //              The SWF object. Methods are passed to this.
                flashMedia:null,

                // allowScriptAccess: String
                //              Whether the SWF can access the container JS
                allowScriptAccess:"always",

                // allowNetworking: String
                //              Whether SWF is restricted to a domain
                allowNetworking: "all",

                // wmode: String
                //              The render type of the SWF
                wmode: "transparent",

                // allowFullScreen: Boolean
                //              Whether to allow the SWF to go to fullscreen
                allowFullScreen:true,
        
                _initStatus: function(){
                        // summary:
                        //              Connect mediaStatus to the media.
                        //
                        this.status = "ready";
                        this._positionHandle = dojo.connect(this, "onPosition", this, "_figureStatus");
        
                },
        
                //  ==============  //
                //  Player Getters  //
                //  ==============  //
        
                getTime: function(){
                        // summary:
                        //              Returns the current time of the video

                        //              Note:
                        //              Consider the onPosition event, which returns
                        //              the time at a set interval. Too many trips to
                        //              the SWF could impact performance.
                        return this.flashMedia.getTime(); // Float
                },
        
                //  =============  //
                //  Player Events  //
                //  =============  //
        
                onLoad: function(/* SWF */ mov){
                        // summary:
                        //              Fired when the SWF player has loaded
                        //              NOT when the video has loaded
                },
        
                onDownloaded: function(/* Number */percent){
                        // summary:
                        //              Fires the amount of that the media has been
                        //              downloaded. Number, 0-100
                },
        
                onClick: function(/* Object */ evt){
                        // summary:
                        //              Fires when the player is clicked
                        //              Could be used to toggle play/pause, or
                        //              do an external activity, like opening a new
                        //              window.

                        // TODO: Return x/y of click
                },
        
                onSwfSized: function(/* Object */ data){
                        // summary:
                        //              Fired on SWF resize, or when its
                        //              toggled between fullscreen.
                },
        
                onMetaData: function(/* Object */ data, /* Object */ evt){
                        // summary:
                        //              The video properties. Width, height, duration, etc.

                        // NOTE:        if data is empty, this is an older FLV with no meta data.
                        //                      Duration cannot be determined. In original FLVs, duration
                        //                      could only be obtained with Flash Media Server.
                        // NOTE:        Older FLVs can still return width and height
                        //                      and will do so on a second event call

                        console.warn("onMeta", data)
                        this.duration = data.duration;
                },
        
                onPosition: function(/* Float */ time){
                        // summary:
                        //              The position of the playhead in seconds
                },
        
                onStart: function(/* Object */ data){
                        // summary:
                        //              Fires when video starts
                        //              Good for setting the play button to pause
                        //              during an autoPlay for example
                },
        
                onPlay: function(/* Object */ data){
                        // summary:
                        //              Fires when video starts and resumes
                },
        
                onPause: function(/* Object */ data){
                        // summary:
                        //              Fires when the pause button is clicked
                },
        
                onEnd: function(/* Object */ data){
                        // summary:
                        //              Fires when video ends
                        //              Could be used to change pause button to play
                        //              or show a post video graphic, like YouTube
                },
        
                onStop: function(){
                        // summary:
                        //              Fire when the Stop button is clicked
                        
                        // TODO:        This is not hooked up yet and shouldn't
                        //                      fire.
                },
        
                onBuffer: function(/* Boolean */ isBuffering){
                        // summary:
                        //              Fires a boolean to tell if media
                        //              is paused for buffering or if buffering
                        //              has finished
                        this.isBuffering = isBuffering;
                },
        
                onError: function(/* Object */ data, /* String */ url){
                        // summary:
                        //              Fired when the player encounters an error
                        // example:
                        //              | console.warn("ERROR-"+data.type.toUpperCase()+":",
                        //              |               data.info.code, " - URL:", url);
                        console.warn("ERROR-"+data.type.toUpperCase()+":", data.info.code, " - URL:", url);
                },
        
                onStatus: function(/* Object */data){
                        // summary:
                        //              Simple status
                },
        
                onPlayerStatus: function(/* Object */data){
                        // summary:
                        //              The status of the video from the SWF
                        //              playing, stopped, bufering, etc.
                },
        
                onResize: function(){
        
                },
        
                _figureStatus: function(){
                        // summary:
                        //              Calculate media status, based on playhead movement, and
                        //              onStop and onStart events

                        // TODO:
                        //              Figure in real status from the media for more accurate results.

                        var pos = this.getTime();
                        //console.log(pos, this.duration,  (pos>this.duration-.5), (this.duration && pos>this.duration-.5))
        
                        if(this.status=="stopping"){
                                // stop was fired, need to fake pos==0
                                this.status = "stopped";
                                this.onStop(this._eventFactory());
        
                        }else if(this.status=="ending" && pos==this._prevPos){
                                this.status = "ended";
                                this.onEnd(this._eventFactory());
        
                        }else if(this.duration && pos>this.duration-.5){
                                this.status="ending"
        
                        }else if(pos===0 ){//|| this.status == "stopped"
                                if(this.status == "ready"){
                                        //never played
                                }else{
                                        //stopped
                                        this.status = "stopped";
                                        if(this._prevStatus != "stopped"){
                                                this.onStop(this._eventFactory());
                                        }
                                }
        
                        }else{
                                // pos > 0
                                if(this.status == "ready"){
                                        //started
                                        this.status = "started";
                                        this.onStart(this._eventFactory());
                                        this.onPlay(this._eventFactory());
        
                                }else if(this.isBuffering){
                                        this.status = "buffering";
        
                                }else if(this.status == "started" || (this.status == "playing" &&  pos != this._prevPos)){
                                        this.status = "playing";
                                        //this.onPosition(this._eventFactory());
        
                                }else if(!this.isStopped && this.status == "playing" && pos == this._prevPos){
                                        this.status = "paused";
                                        console.warn("pause", pos, this._prevPos)
                                        if(this.status != this._prevStatus){
                                                this.onPause(this._eventFactory());
                                        }
        
                                }else if((this.status == "paused" ||this.status == "stopped") && pos != this._prevPos){
                                        this.status = "started";
                                        this.onPlay(this._eventFactory());
                                }
                        }
        
                        this._prevPos = pos;
                        this._prevStatus = this.status;
                        this.onStatus(this.status);
        
        
                },
        
                _eventFactory: function(){
                        // summary:
                        //              Creates a generic event object.
                        //
                        var evt = {
                                //position:this._channel.position,
                                //seconds:this.toSeconds(this._channel.position*.001),
                                //percentPlayed:this._getPercent(),
                                status:this.status
                        };
                        return evt; // Object
                },
        
        
        
                _sub: function(topic, method){
                        // summary:
                        //              helper for subscribing to topics
                        dojo.subscribe(this.id+"/"+topic, this, method);
                },
        
                _normalizeVolume: function(vol){
                        // summary:
                        //              Ensures volume is less than one
                        //
                        if(vol>1){
                                while(vol>1){
                                        vol*=.1
                                }
                        }
                        return vol;
                },
        
                _normalizeUrl: function(_url){
                        // summary:
                        //              Checks that path is relative to HTML file or
                        //              converts it to an absolute path.

                        console.log("  url:", _url);
        
                        if(_url && (_url.toLowerCase().indexOf("http")<0 || _url.indexOf("/") == 0)){
                                //
                                // Appears to be a relative path. Attempt to  convert it to absolute,
                                // so it will better target the SWF.
                                var loc = window.location.href.split("/");
                                loc.pop();
        
                                loc = loc.join("/")+"/";
                                console.log("  loc:", loc);
                                _url = loc+_url;
                        }
                        return _url;
                },
        
                destroy: function(){
                        // summary:
                        //              destroys flash
                        if(!this.flashMedia){
                                this._cons.push(dojo.connect(this, "onLoad", this, "destroy"));
                                return;
                        }
                        dojo.forEach(this._subs, function(s){
                                dojo.unsubscribe(s);
                        });
                        dojo.forEach(this._cons, function(c){
                                dojo.disconnect(c);
                        });
                        this._flashObject.destroy();
                        //dojo._destroyElement(this.flashDiv);
        
                }
        });
});