clean project

Assets/Oculus/Platform/Scripts/BufferedAudioStream.cs

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+//#define VERBOSE_LOGGING
+using UnityEngine;
+using System.Collections;
+using System;
+
+using Oculus.Platform;
+
+public class BufferedAudioStream {
+  const bool VerboseLogging = false;
+  AudioSource audio;
+
+  float[] audioBuffer;
+  int writePos;
+
+  const float bufferLengthSeconds = 0.25f;
+  const int sampleRate = 48000;
+  const int bufferSize = (int)(sampleRate * bufferLengthSeconds);
+  const float playbackDelayTimeSeconds = 0.05f;
+
+  float playbackDelayRemaining;
+  float remainingBufferTime;
+
+  public BufferedAudioStream(AudioSource audio) {
+    audioBuffer = new float[bufferSize];
+    this.audio = audio;
+
+    audio.loop = true;
+    audio.clip = AudioClip.Create("", bufferSize, 1, sampleRate, false);
+
+    Stop();
+  }
+
+  public void Update () {
+    
+    if(remainingBufferTime > 0)
+    {
+#if VERBOSE_LOGGING
+      Debug.Log(string.Format("current time: {0}, remainingBufferTime: {1}", Time.time, remainingBufferTime));
+#endif
+
+      if (!audio.isPlaying && remainingBufferTime > playbackDelayTimeSeconds)
+      {
+        playbackDelayRemaining -= Time.deltaTime;
+        if (playbackDelayRemaining <= 0)
+        {
+#if VERBOSE_LOGGING
+          Debug.Log("Starting playback");
+#endif
+          audio.Play();
+        }
+      }
+
+      if (audio.isPlaying)
+      {
+        remainingBufferTime -= Time.deltaTime;
+        if (remainingBufferTime < 0)
+        {
+          remainingBufferTime = 0;
+        }
+      }
+    }
+
+    if (remainingBufferTime <= 0)
+    {
+      if (audio.isPlaying)
+      {
+        Debug.Log("Buffer empty, stopping " + DateTime.Now);
+        Stop();
+      }
+      else
+      {
+        if (writePos != 0)
+        {
+          Debug.LogError("writePos non zero while not playing, how did this happen?");
+        }
+      }
+    }
+  }
+
+  void Stop()
+  {
+    audio.Stop();
+    audio.time = 0;
+    writePos = 0;
+    playbackDelayRemaining = playbackDelayTimeSeconds;
+  }
+
+  public void AddData(float[] samples) {
+    int remainingWriteLength = samples.Length;
+
+    if(writePos > audioBuffer.Length) {
+      throw new Exception();
+    }
+
+    do {
+      int writeLength = remainingWriteLength;
+      int remainingSpace = audioBuffer.Length - writePos;
+
+      if(writeLength > remainingSpace) {
+        writeLength = remainingSpace;
+      }
+
+      Array.Copy(samples, 0, audioBuffer, writePos, writeLength);
+
+      remainingWriteLength -= writeLength;
+      writePos += writeLength;
+      if(writePos > audioBuffer.Length) {
+        throw new Exception();
+      }
+      if(writePos == audioBuffer.Length) {
+        writePos = 0;
+      }
+    } while(remainingWriteLength > 0);
+
+#if VERBOSE_LOGGING
+    float prev = remainingBufferTime;
+#endif
+    remainingBufferTime += (float)samples.Length / sampleRate;
+#if VERBOSE_LOGGING
+    Debug.Log(string.Format("previous remaining: {0}, new remaining: {1}, added {2} samples", prev, remainingBufferTime, samples.Length));
+#endif
+    audio.clip.SetData(audioBuffer, 0);
+  }
+
+
+}