User:David.humphrey/Audio Data API 2: Difference between revisions

User:David.humphrey/Audio Data API 2 (view source)

225 bytes added , 21 May 2010

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@@ Line 167: / Line 167: @@
 <pre>
-// Create a new audio stream for writing
+<audio id="a1"
-var aout = new Audio();
+       src="song.ogg"
-aout.mozSetup(2, 44100, 1);
+       onloadedmetadata="loadedMetadata(event);"
+       onaudiowritten="audioWritten(event);"
+       controls="controls">
+</audio>
+<script>
+var a1 = document.getElementById('a1'),
+    a2 = new Audio(),
-function audioWritten(event){
+function loadedMetadata(event) {
-   samples = event.mozFrameBuffer;
+   // Mute a1 audio.
+  a1.volume = 0;
+  // Setup a2 to be identical to a1, and play through there.
+  a2.mozSetup(event.mozChannels, event.mozRate, 1);
-  // Do any filtering, signal processing, etc.
+}
-  for (var i=0, slen=samples.length; i < slen; i++){
-    process(samples[i]);
-  }
-   aout.mozWriteAudio(samples);
+function audioWritten(event) {
+   // Write the current frame to a2
+  a2.mozWriteAudio(event.mozFrameBuffer);
 }
+</script>
 </pre>