interpreter/preprocessor/faust-0.9.47mr3/tools/faust2flash_v0.1/Step_2_FlashBuilder_project/src/Flausht.mxml

   1 <?xml version="1.0" encoding="utf-8"?>
   2 <s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark" xmlns:mx="library://ns.adobe.com/flex/halo" minWidth="250" minHeight="300" width="366" height="337" backgroundColor="#D9DFEF">
   3         <fx:Script>
   4                 <![CDATA[
   5                         // UI and event includes
   6                         import mx.events.SliderEvent;
   7                         import mx.controls.sliderClasses.Slider;
   8                         import spark.components.CheckBox;
   9                         import spark.components.Button;
  10                         import flashx.textLayout.formats.Float;
  11                         import mx.controls.Label;
  12                         import spark.components.HGroup;
  13                         import spark.components.HSlider;
  14
  15                         // random flash includes I needed along the way
  16                         import flash.display.*;
  17                         import flash.events.*;
  18                         import flash.media.*;
  19                         import flash.net.*;
  20
  21                         // Alchemy includes
  22                         import cmodule.faustalchemy.CLibInit;
  23
  24                         private var sound:Sound = new Sound();
  25
  26                         private var inputSound:Sound;
  27                         private var inputSoundOn:Boolean = false;
  28                         private var inputSoundBuffer:ByteArray = new ByteArray();
  29                         private var inputSoundPosition:Number = 0;
  30
  31                         private var samples:ByteArray = new ByteArray();
  32                         private var tick_:Number = 0;
  33                         private var f_:int = 440;
  34
  35                         // C++ API
  36                         private var faust_loader:CLibInit;
  37                         private var faust:Object;  // api methods are exposed as properties of this obejct
  38                         private var faustOK:Boolean = false;  // true if library loaded.
  39
  40                         public function initFaust():void {
  41                                 faust_loader = new CLibInit();
  42                                 faust = faust_loader.init();
  43                                 // Initialize UI controls
  44                                 // This changed at the last minute and may not be up-to-date in the writeup.
  45                                 // Instead of calling back into actionscript, faust_init returns an
  46                                 // array of Objects that allows us to set up the UI as .dsp files want.
  47                                 var uistuff:Array = faust.api_init();
  48                                 for (var i:int = 0; i < uistuff.length; ++i) {
  49                                         var item:Object = uistuff[i];
  50                                         var type:Number = item['type'];
  51                                         var id:Number = item['id'];
  52                                         var label:String = item['label'];
  53                                         var min:Number = item['min'];
  54                                         var max:Number = item['max'];
  55                                         var init:Number = item['init'];
  56                                         var step:Number = item['step'];
  57                                         if (type == 0) {
  58                                                 ui_addButton(label, id);
  59                                         }
  60                                         if (type == 1) {
  61                                                 ui_addCheckButton(label, id);
  62                                         }
  63                                         if (type == 2) {
  64                                                 ui_addHorizontalSlider(label, id, init, min, max, step);
  65                                         }
  66                                 }
  67
  68                                 faustOK = true;
  69                         }
  70
  71                 // This function gets called by Flash when it needs more audio data.
  72                 public function soundCallback(event:SampleDataEvent):void {
  73                                 // sample length can be anywhere from 2048 to 8192.
  74                                 if (!faustOK) return;
  75
  76                                 // We need to pass mp3 input to Faust if
  77                                 // If we're not processing input, save cycles.
  78                                 if (inputSoundOn) {
  79                                         if (inputSoundPosition + 8192 > (inputSound.length*44100/1000)) {
  80                                                 // ran out of buffer
  81                                                 inputSoundPosition = 0;
  82                                         }
  83
  84                                         inputSoundBuffer.position = 0;
  85                                         inputSound.extract(inputSoundBuffer, 8192, inputSoundPosition);
  86                                         inputSoundBuffer.position = 0;
  87                                     faust.api_tick(8192, 1, inputSoundBuffer, event.data);
  88                                         inputSoundPosition += 8192;
  89
  90                                     // uncomment this section to debug in case calling C++ isn't working:
  91                                     // just copy the mp3 data directly to the output buffer.
  92                                     /*
  93                                     inputSound.extract(event.data, 8192, inputSoundPosition);
  94                                     inputSoundPosition += (8192);
  95                                     */
  96                                 } else {
  97                                         faust.api_tick(8192, 0, inputSoundBuffer, event.data);
  98                                 }
  99                         }
 100
 101                         // "Start" button callback.
 102                         protected function button1_clickHandler(event:MouseEvent):void
 103                         {
 104                                 initFaust();
 105                                 dbgtext.text = "Playback started.";
 106                                 sound.addEventListener(SampleDataEvent.SAMPLE_DATA, soundCallback);
 107                                 sound.play();
 108                         }
 109
 110                         public function onControlChange(id:int, val:Number):void {
 111                                 if (!faustOK) return;
 112                                 faust.api_onControlChange(id, val);
 113                         }
 114
 115                 // UI Hooks
 116                 public function ui_addButton(label:String, id:int):void {
 117                         var b:Button = new Button();
 118                         b.label = label;
 119                         b.addEventListener("click", function(evt:Event):void {
 120                                 onControlChange(id, 1.0);
 121                         });
 122                         addElement(b);
 123                 }
 124
 125                 public function ui_addToggleButton(label:String, id:int):void {
 126                         // toggle/check buttons seem to be identical.
 127                         return ui_addCheckButton(label, id);
 128                 }
 129
 130                 public function ui_addCheckButton(label:String, id:int):void {
 131                         var cb:CheckBox = new CheckBox();
 132                         cb.label = label;
 133                         cb.addEventListener("change",
 134                                 function(evt:SliderEvent):void {
 135                                         var checked_val:int = cb.selected ? 1.0 : 0.0;
 136                                         onControlChange(id, checked_val);
 137                                 });
 138                 }
 139
 140
 141                 public function ui_addVerticalSlider(label:String, id:int, init:Number, min:Number, max:Number, step:Number):void {
 142                         // Just call HSlider since we have a vertical cascade of controls.
 143                         return ui_addHorizontalSlider(label, id, init, min, max, step);
 144                 }
 145
 146                 public function ui_addHorizontalSlider(label:String, id:int, init:Number, min:Number, max:Number, step:Number):void {
 147                         var compGroup:HGroup = new HGroup();
 148                                 // Text label
 149                         var compLabel:Label = new Label();
 150                         compLabel.text = label;
 151                                 // Actual control
 152                         var compSlider:spark.components.HSlider = new spark.components.HSlider();
 153                         compSlider.minimum = min;
 154                         compSlider.maximum = max;
 155                         compSlider.liveDragging = true; // update faust params while dragging the slider
 156                         compSlider.value = init;
 157                         compSlider.valueInterval = step;
 158                         compSlider.width = 200;
 159
 160                         compSlider.addEventListener("change",
 161                                 function(evt:Event):void {
 162                                                 onControlChange(id, compSlider.value);
 163                                 });
 164                                 // wire everything up
 165                         compGroup.addElement(compLabel);
 166                         compGroup.addElement(compSlider);
 167                 addElement(compGroup);
 168                 }
 169
 170                 public function ui_addNumEntry(label:String, id:int, init:Number, min:Number, max:Number, step:Number):void {
 171                         // TODO: A proper text box requires validation.
 172                         // Also, slider controls could probably benefit from numeric input too...
 173                         // Create a unified control for {VSlider, HSlider, NumEntry}
 174                         return ui_addHorizontalSlider(label, id, init, min, max, step);
 175                 }
 176
 177
 178                 // Layout management
 179                 // These are "nice to have" functions but aren't critical.
 180                 // It doesn't look like they're widely used.
 181                 // TODO: if using Flex, these should be easy enough to implement.
 182                 public function ui_openFrameBox(label:String):void { }
 183                 public function ui_openTabBox(label:String):void { }
 184                 public function ui_openHorizontalBox(label:String):void { }
 185                 public function ui_openVerticalBox(label:String):void { }
 186                 public function ui_closeBox():void { }
 187                 // We don't need a run() notification since we call into Faust code directly.
 188                 public function ui_run():void { }
 189
 190
 191                 // "Load input sound" button callback
 192                 protected function button2_clickHandler(evt:MouseEvent):void {
 193                         inputSoundOn = false;
 194                         if (!inputSound)
 195                           inputSound = new Sound();
 196                                 var urlReq:URLRequest = new URLRequest(mp3path.text);
 197                                 inputSound.load(urlReq);
 198                                 inputSound.addEventListener(Event.COMPLETE,
 199                                         function(evt:Event):void {
 200                                                 dbgtext.text = "sound finished loading.";
 201                                                 inputSoundOn = true;
 202                                                 inputSoundPosition = 0;
 203                                         });
 204                 }
 205
 206
 207                         //"Stop input sound" button callback
 208                         protected function button3_clickHandler(event:MouseEvent):void
 209                         {
 210                                 dbgtext.text = "sound stopped.";
 211                                 inputSoundOn = false;
 212                                 inputSoundPosition = 0;
 213                         }
 214
 215                 ]]>
 216
 217         </fx:Script>
 218         <s:Button label="Start" click="button1_clickHandler(event)"/>
 219         <s:TextArea width="322" height="19" text="Click Start to begin." id="dbgtext"/>
 220         <s:TextInput text="http://ccrma.stanford.edu/~travissk/faustflash/helterskelter.mp3" id="mp3path" width="359"/>
 221         <s:HGroup width="237" height="28">
 222                 <s:Button label="Load Sound" click="button2_clickHandler(event)"/>
 223                 <s:Button label="Stop Sound" click="button3_clickHandler(event)"/>
 224         </s:HGroup>
 225
 226         <s:layout>
 227                 <s:VerticalLayout/>
 228         </s:layout>
 229 </s:Application>