| 1 | /** |
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| 2 | * Wrapper for playback of progressively downloaded video. |
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| 3 | **/ |
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| 4 | package com.jeroenwijering.models { |
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| 5 | |
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| 6 | |
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| 7 | import com.jeroenwijering.events.*; |
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| 8 | import com.jeroenwijering.models.ModelInterface; |
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| 9 | import com.jeroenwijering.player.Model; |
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| 10 | import flash.events.*; |
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| 11 | import flash.display.DisplayObject; |
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| 12 | import flash.media.SoundTransform; |
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| 13 | import flash.media.Video; |
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| 14 | import flash.net.*; |
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| 15 | import flash.utils.clearInterval; |
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| 16 | import flash.utils.setInterval; |
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| 17 | |
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| 18 | |
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| 19 | public class HTTPModel implements ModelInterface { |
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| 20 | |
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| 21 | |
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| 22 | /** reference to the model. **/ |
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| 23 | private var model:Model; |
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| 24 | /** Video object to be instantiated. **/ |
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| 25 | private var video:Video; |
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| 26 | /** NetConnection object for setup of the video stream. **/ |
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| 27 | private var connection:NetConnection; |
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| 28 | /** NetStream instance that handles the stream IO. **/ |
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| 29 | private var stream:NetStream; |
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| 30 | /** Sound control object. **/ |
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| 31 | private var transform:SoundTransform; |
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| 32 | /** Interval ID for the time. **/ |
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| 33 | private var timeinterval:Number; |
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| 34 | /** Interval ID for the loading. **/ |
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| 35 | private var loadinterval:Number; |
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| 36 | /** Object with keyframe times and positions. **/ |
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| 37 | private var keyframes:Object; |
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| 38 | /** Offset byteposition to start streaming. **/ |
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| 39 | private var offset:Number; |
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| 40 | /** Offset timeposition for lighttpd streaming. **/ |
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| 41 | private var timeoffset:Number; |
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| 42 | /** switch for h264 streaming **/ |
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| 43 | private var h264:Boolean; |
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| 44 | /** Byteposition to which the file has been loaded. **/ |
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| 45 | private var loaded:Number; |
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| 46 | |
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| 47 | |
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| 48 | /** Constructor; sets up the connection and display. **/ |
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| 49 | public function HTTPModel(mod:Model) { |
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| 50 | model = mod; |
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| 51 | connection = new NetConnection(); |
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| 52 | connection.addEventListener(NetStatusEvent.NET_STATUS,statusHandler); |
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| 53 | connection.addEventListener(SecurityErrorEvent.SECURITY_ERROR,errorHandler); |
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| 54 | connection.addEventListener(AsyncErrorEvent.ASYNC_ERROR,errorHandler); |
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| 55 | connection.connect(null); |
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| 56 | stream = new NetStream(connection); |
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| 57 | stream.addEventListener(NetStatusEvent.NET_STATUS,statusHandler); |
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| 58 | stream.addEventListener(IOErrorEvent.IO_ERROR,errorHandler); |
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| 59 | stream.addEventListener(AsyncErrorEvent.ASYNC_ERROR,errorHandler); |
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| 60 | stream.bufferTime = model.config['bufferlength']; |
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| 61 | stream.client = this; |
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| 62 | video = new Video(320,240); |
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| 63 | video.attachNetStream(stream); |
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| 64 | transform = new SoundTransform(); |
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| 65 | stream.soundTransform = transform; |
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| 66 | model.config['mute'] == true ? volume(0): volume(model.config['volume']); |
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| 67 | quality(model.config['quality']); |
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| 68 | offset = timeoffset = 0; |
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| 69 | }; |
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| 70 | |
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| 71 | |
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| 72 | /** Catch security errors. **/ |
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| 73 | private function errorHandler(evt:ErrorEvent) { |
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| 74 | model.sendEvent(ModelEvent.ERROR,{message:evt.text}); |
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| 75 | }; |
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| 76 | |
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| 77 | |
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| 78 | /** Return a keyframe byteoffset or timeoffset. **/ |
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| 79 | private function getOffset(pos:Number,tme:Boolean=false):Number { |
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| 80 | var off = 0; |
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| 81 | if(keyframes === null) { |
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| 82 | errorHandler(new ErrorEvent(ErrorEvent.ERROR,false,false,"This file has no seekpoints metadata.")); |
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| 83 | return 0; |
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| 84 | } |
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| 85 | for (var i=0; i< keyframes.times.length; i++) { |
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| 86 | if((keyframes.times[i] <= pos || i ==0) && (keyframes.times[i+1] >= pos || !keyframes.times[i+1])) { |
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| 87 | if(tme == true) { |
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| 88 | off = keyframes.times[i]; |
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| 89 | } else { |
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| 90 | off = keyframes.filepositions[i]; |
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| 91 | } |
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| 92 | break; |
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| 93 | } |
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| 94 | } |
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| 95 | return off; |
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| 96 | }; |
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| 97 | |
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| 98 | |
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| 99 | /** Load content. **/ |
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| 100 | public function load() { |
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| 101 | stream.close(); |
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| 102 | var url = model.playlist[model.config['item']]['file']; |
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| 103 | if(model.config["streamscript"] == "lighttpd") { |
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| 104 | if(h264) { |
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| 105 | url +='?start='+timeoffset; |
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| 106 | } else { |
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| 107 | url += '?start='+offset; |
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| 108 | } |
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| 109 | } else { |
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| 110 | if(model.config["streamscript"].indexOf('?') > -1) { |
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| 111 | url = model.config["streamscript"]+"&file="+url+'&start='+offset; |
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| 112 | } else { |
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| 113 | url = model.config["streamscript"]+"?file="+url+'&start='+offset; |
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| 114 | } |
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| 115 | } |
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| 116 | url += '&width='+model.config['width']; |
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| 117 | url += '&client='+encodeURI(model.config['client']); |
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| 118 | url += '&version='+encodeURI(model.config['version']); |
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| 119 | stream.play(url); |
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| 120 | clearInterval(loadinterval); |
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| 121 | clearInterval(timeinterval); |
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| 122 | model.sendEvent(ModelEvent.STATE,{newstate:ModelStates.BUFFERING}); |
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| 123 | loadinterval = setInterval(loadHandler,100); |
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| 124 | timeinterval = setInterval(timeHandler,100); |
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| 125 | }; |
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| 126 | |
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| 127 | |
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| 128 | /** Interval for the loading progress **/ |
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| 129 | private function loadHandler() { |
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| 130 | loaded = stream.bytesLoaded; |
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| 131 | var ttl = stream.bytesTotal; |
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| 132 | model.sendEvent(ModelEvent.LOADED,{loaded:loaded,total:ttl+offset,offset:offset}); |
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| 133 | if(loaded >= ttl && loaded > 0) { |
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| 134 | clearInterval(loadinterval); |
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| 135 | } |
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| 136 | }; |
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| 137 | |
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| 138 | |
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| 139 | /** Get textdata from netstream. **/ |
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| 140 | public function onImageData(info:Object) { |
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| 141 | var dat = new Object(); |
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| 142 | for(var i in info) { |
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| 143 | dat[i] = info[i]; |
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| 144 | } |
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| 145 | model.sendEvent(ModelEvent.META,dat); |
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| 146 | }; |
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| 147 | |
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| 148 | |
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| 149 | /** Handler for onLastSecond call. **/ |
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| 150 | public function onLastSecond(info:Object) { }; |
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| 151 | |
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| 152 | |
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| 153 | /** Get metadata information from netstream class. **/ |
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| 154 | public function onMetaData(info:Object) { |
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| 155 | if(h264) { return; } |
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| 156 | if(info.width) { |
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| 157 | video.width = info.width; |
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| 158 | video.height = info.height; |
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| 159 | model.mediaHandler(video); |
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| 160 | } else { |
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| 161 | model.mediaHandler(); |
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| 162 | } |
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| 163 | if(info.seekpoints) { |
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| 164 | h264 = true; |
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| 165 | keyframes = new Object(); |
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| 166 | keyframes.times = new Array(); |
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| 167 | keyframes.filepositions = new Array(); |
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| 168 | for (var j in info.seekpoints) { |
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| 169 | keyframes.times.push(Number(info.seekpoints[j]['time'])); |
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| 170 | keyframes.filepositions.push(Number(info.seekpoints[j]['offset'])); |
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| 171 | } |
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| 172 | } else if(info.keyframes) { |
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| 173 | keyframes = info.keyframes; |
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| 174 | } |
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| 175 | var dat = new Object(); |
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| 176 | for(var i in info) { |
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| 177 | dat[i] = info[i]; |
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| 178 | } |
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| 179 | delete dat.seekpoints; |
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| 180 | dat.keyframes = ''; |
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| 181 | for(var k=0; k<keyframes.times.length; k++) { |
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| 182 | dat['keyframes'] += ','+keyframes.times[k]+':'+keyframes.filepositions[k]; |
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| 183 | } |
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| 184 | model.sendEvent(ModelEvent.META,dat); |
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| 185 | if(model.playlist[model.config['item']]['start'] > 0) { |
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| 186 | seek(model.playlist[model.config['item']]['start']); |
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| 187 | } |
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| 188 | }; |
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| 189 | |
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| 190 | |
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| 191 | /** Get textdata from netstream. **/ |
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| 192 | public function onTextData(info:Object) { |
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| 193 | var dat = new Object(); |
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| 194 | for(var i in info) { |
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| 195 | dat[i] = info[i]; |
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| 196 | } |
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| 197 | model.sendEvent(ModelEvent.META,dat); |
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| 198 | }; |
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| 199 | |
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| 200 | |
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| 201 | /** Pause playback. **/ |
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| 202 | public function pause() { |
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| 203 | clearInterval(timeinterval); |
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| 204 | stream.pause(); |
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| 205 | model.sendEvent(ModelEvent.STATE,{newstate:ModelStates.PAUSED}); |
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| 206 | }; |
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| 207 | |
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| 208 | |
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| 209 | /** Resume playing. **/ |
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| 210 | public function play() { |
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| 211 | stream.resume(); |
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| 212 | model.sendEvent(ModelEvent.STATE,{newstate:ModelStates.PLAYING}); |
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| 213 | timeinterval = setInterval(timeHandler,100); |
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| 214 | }; |
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| 215 | |
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| 216 | |
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| 217 | /** Change the smoothing mode. **/ |
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| 218 | public function seek(pos:Number) { |
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| 219 | clearInterval(timeinterval); |
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| 220 | var off = getOffset(pos); |
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| 221 | if(off < offset || off > offset+loaded) { |
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| 222 | offset = off; |
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| 223 | timeoffset = getOffset(pos,true); |
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| 224 | load(); |
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| 225 | } else { |
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| 226 | if(h264) { |
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| 227 | stream.seek(pos-timeoffset); |
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| 228 | } else { |
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| 229 | stream.seek(pos) |
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| 230 | } |
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| 231 | play(); |
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| 232 | } |
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| 233 | }; |
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| 234 | |
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| 235 | |
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| 236 | /** Change the smoothing mode. **/ |
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| 237 | public function quality(qua:Boolean) { |
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| 238 | if(qua == true) { |
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| 239 | video.smoothing = true; |
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| 240 | video.deblocking = 4; |
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| 241 | } else { |
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| 242 | video.smoothing = false; |
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| 243 | video.deblocking = 1; |
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| 244 | } |
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| 245 | }; |
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| 246 | |
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| 247 | |
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| 248 | /** Receive NetStream status updates. **/ |
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| 249 | private function statusHandler(evt:NetStatusEvent) { |
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| 250 | if(evt.info.code == "NetStream.Play.Stop") { |
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| 251 | if(model.config['state'] != ModelStates.COMPLETED) { |
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| 252 | clearInterval(timeinterval); |
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| 253 | model.sendEvent(ModelEvent.STATE,{newstate:ModelStates.COMPLETED}); |
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| 254 | } |
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| 255 | } else if(evt.info.code == "NetStream.Play.StreamNotFound") { |
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| 256 | stop(); |
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| 257 | model.sendEvent(ModelEvent.ERROR,{message:"Video stream not found: " + |
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| 258 | model.playlist[model.config['item']]['file']}); |
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| 259 | } else { |
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| 260 | model.sendEvent(ModelEvent.META,{info:evt.info.code}); |
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| 261 | } |
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| 262 | }; |
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| 263 | |
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| 264 | |
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| 265 | /** Destroy the HTTP stream. **/ |
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| 266 | public function stop() { |
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| 267 | clearInterval(loadinterval); |
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| 268 | clearInterval(timeinterval); |
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| 269 | stream.close(); |
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| 270 | offset = timeoffset = 0; |
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| 271 | }; |
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| 272 | |
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| 273 | |
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| 274 | /** Interval for the position progress **/ |
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| 275 | private function timeHandler() { |
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| 276 | var bfr = Math.round(stream.bufferLength/stream.bufferTime*100); |
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| 277 | var pos = Math.round(stream.time*10)/10; |
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| 278 | if (h264) { pos += timeoffset; } |
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| 279 | var dur = model.playlist[model.config['item']]['duration']; |
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| 280 | if(bfr<100 && pos < Math.abs(dur-stream.bufferTime*2)) { |
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| 281 | model.sendEvent(ModelEvent.BUFFER,{percentage:bfr}); |
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| 282 | if(model.config['state'] != ModelStates.BUFFERING && bfr<50) { |
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| 283 | model.sendEvent(ModelEvent.STATE,{newstate:ModelStates.BUFFERING}); |
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| 284 | } |
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| 285 | } else if (model.config['state'] == ModelStates.BUFFERING) { |
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| 286 | model.sendEvent(ModelEvent.STATE,{newstate:ModelStates.PLAYING}); |
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| 287 | } |
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| 288 | if(dur > 0) { |
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| 289 | model.sendEvent(ModelEvent.TIME,{position:pos,duration:dur}); |
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| 290 | } |
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| 291 | }; |
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| 292 | |
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| 293 | |
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| 294 | /** Set the volume level. **/ |
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| 295 | public function volume(vol:Number) { |
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| 296 | transform.volume = vol/100; |
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| 297 | stream.soundTransform = transform; |
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| 298 | }; |
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| 299 | |
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| 300 | |
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| 301 | }; |
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| 302 | |
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| 303 | |
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| 304 | } |
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