comparison loudness.js @ 471:3a9b869ba7f8 Dev_main

Better loudness calculation. Buffer ready not called until after loudness calculation to avoid NaNs on gain. <survey> nodes do not need to be present, no survey then no node. Added example boilerplate interface with all required functions and brief descriptions.

 	{
 		target = -23;
 	}
 	if (offlineContext == undefined)
 	{
-		offlineContext = new OfflineAudioContext(buffer.numberOfChannels, buffer.length, buffer.sampleRate);
+		offlineContext = new OfflineAudioContext(buffer.buffer.numberOfChannels, buffer.buffer.length, buffer.buffer.sampleRate);
 	}
 	// Create the required filters
 	var KFilter = offlineContext.createBiquadFilter();
 	KFilter.type = "highshelf";
 	KFilter.gain.value = 4;

 	HPFilter.type = "highpass";
 	HPFilter.Q.value = 0.707;
 	HPFilter.frequency.value = 60;
 	// copy Data into the process buffer
 	var processSource = offlineContext.createBufferSource();
-	processSource.buffer = buffer;
+	processSource.buffer = buffer.buffer;
 	
 	processSource.connect(KFilter);
 	KFilter.connect(HPFilter);
 	HPFilter.connect(offlineContext.destination);
 	processSource.start();

 						relgateEnergy[c].push(blockEnergy[c][i]);
 					}
 				}
 			}
 			var overallRelLoudness = calculateOverallLoudnessFromChannelBlocks(relgateEnergy);
-			buffer.lufs =  overallRelLoudness;
+			buffer.buffer.lufs =  overallRelLoudness;
+			buffer.ready();
 		}
 	};
 	offlineContext.startRendering();
 }