Rename BufferProcessor to AudioProcessor.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=148763781

extensions/ffmpeg/src/main/java/com/google/android/exoplayer2/ext/ffmpeg/FfmpegAudioRenderer.java

@@ -19,8 +19,8 @@ import android.os.Handler;
 import com.google.android.exoplayer2.C;
 import com.google.android.exoplayer2.ExoPlaybackException;
 import com.google.android.exoplayer2.Format;
+import com.google.android.exoplayer2.audio.AudioProcessor;
 import com.google.android.exoplayer2.audio.AudioRendererEventListener;
-import com.google.android.exoplayer2.audio.BufferProcessor;
 import com.google.android.exoplayer2.audio.SimpleDecoderAudioRenderer;
 import com.google.android.exoplayer2.drm.ExoMediaCrypto;
 import com.google.android.exoplayer2.util.MimeTypes;
@@ -43,12 +43,11 @@ public final class FfmpegAudioRenderer extends SimpleDecoderAudioRenderer {
    * @param eventHandler A handler to use when delivering events to {@code eventListener}. May be
    *     null if delivery of events is not required.
    * @param eventListener A listener of events. May be null if delivery of events is not required.
-   * @param bufferProcessors Optional {@link BufferProcessor}s which will process PCM audio buffers
+   * @param audioProcessors Optional {@link AudioProcessor}s that will process audio before output.
-   *     before they are output.
    */
   public FfmpegAudioRenderer(Handler eventHandler, AudioRendererEventListener eventListener,
-      BufferProcessor... bufferProcessors) {
+      AudioProcessor... audioProcessors) {
-    super(eventHandler, eventListener, bufferProcessors);
+    super(eventHandler, eventListener, audioProcessors);
   }
 
   @Override

extensions/flac/src/main/java/com/google/android/exoplayer2/ext/flac/LibflacAudioRenderer.java

@@ -17,8 +17,8 @@ package com.google.android.exoplayer2.ext.flac;
 
 import android.os.Handler;
 import com.google.android.exoplayer2.Format;
+import com.google.android.exoplayer2.audio.AudioProcessor;
 import com.google.android.exoplayer2.audio.AudioRendererEventListener;
-import com.google.android.exoplayer2.audio.BufferProcessor;
 import com.google.android.exoplayer2.audio.SimpleDecoderAudioRenderer;
 import com.google.android.exoplayer2.drm.ExoMediaCrypto;
 import com.google.android.exoplayer2.util.MimeTypes;
@@ -38,12 +38,11 @@ public class LibflacAudioRenderer extends SimpleDecoderAudioRenderer {
    * @param eventHandler A handler to use when delivering events to {@code eventListener}. May be
    *     null if delivery of events is not required.
    * @param eventListener A listener of events. May be null if delivery of events is not required.
-   * @param bufferProcessors Optional {@link BufferProcessor}s which will process PCM audio buffers
+   * @param audioProcessors Optional {@link AudioProcessor}s that will process audio before output.
-   *     before they are output.
    */
   public LibflacAudioRenderer(Handler eventHandler, AudioRendererEventListener eventListener,
-      BufferProcessor... bufferProcessors) {
+      AudioProcessor... audioProcessors) {
-    super(eventHandler, eventListener, bufferProcessors);
+    super(eventHandler, eventListener, audioProcessors);
   }
 
   @Override

extensions/gvr/README.md

@@ -3,17 +3,16 @@
 ## Description ##
 
 The GVR extension wraps the [Google VR SDK for Android][]. It provides a
-GvrBufferProcessor, which uses [GvrAudioSurround][] to provide binaural
+GvrAudioProcessor, which uses [GvrAudioSurround][] to provide binaural rendering
-rendering of surround sound and ambisonic soundfields.
+of surround sound and ambisonic soundfields.
 
 ## Instructions ##
 
-If using SimpleExoPlayer, override SimpleExoPlayer.buildBufferProcessors to
+If using SimpleExoPlayer, override SimpleExoPlayer.buildAudioProcessors to
-return a GvrBufferProcessor.
+return a GvrAudioProcessor.
 
-If constructing renderers directly, pass a GvrBufferProcessor to
+If constructing renderers directly, pass a GvrAudioProcessor to
 MediaCodecAudioRenderer's constructor.
 
 [Google VR SDK for Android]: https://developers.google.com/vr/android/
 [GvrAudioSurround]: https://developers.google.com/vr/android/reference/com/google/vr/sdk/audio/GvrAudioSurround
-

extensions/gvr/src/main/java/com/google/android/exoplayer2/ext/gvr/GvrAudioProcessor.java

@@ -17,16 +17,16 @@ package com.google.android.exoplayer2.ext.gvr;
 
 import com.google.android.exoplayer2.C;
 import com.google.android.exoplayer2.Format;
-import com.google.android.exoplayer2.audio.BufferProcessor;
+import com.google.android.exoplayer2.audio.AudioProcessor;
 import com.google.vr.sdk.audio.GvrAudioSurround;
 import java.nio.ByteBuffer;
 import java.nio.ByteOrder;
 
 /**
- * Buffer processor that uses {@code GvrAudioSurround} to provide binaural rendering of surround
+ * An {@link AudioProcessor} that uses {@code GvrAudioSurround} to provide binaural rendering of
- * sound and ambisonic soundfields.
+ * surround sound and ambisonic soundfields.
  */
-public final class GvrBufferProcessor implements BufferProcessor {
+public final class GvrAudioProcessor implements AudioProcessor {
 
   private static final int FRAMES_PER_OUTPUT_BUFFER = 1024;
   private static final int OUTPUT_CHANNEL_COUNT = 2;
@@ -43,7 +43,7 @@ public final class GvrBufferProcessor implements BufferProcessor {
   private float y;
   private float z;
 
-  public GvrBufferProcessor() {
+  public GvrAudioProcessor() {
     // Use the identity for the initial orientation.
     w = 1f;
     sampleRateHz = Format.NO_VALUE;

extensions/opus/src/main/java/com/google/android/exoplayer2/ext/opus/LibopusAudioRenderer.java

@@ -17,8 +17,8 @@ package com.google.android.exoplayer2.ext.opus;
 
 import android.os.Handler;
 import com.google.android.exoplayer2.Format;
+import com.google.android.exoplayer2.audio.AudioProcessor;
 import com.google.android.exoplayer2.audio.AudioRendererEventListener;
-import com.google.android.exoplayer2.audio.BufferProcessor;
 import com.google.android.exoplayer2.audio.SimpleDecoderAudioRenderer;
 import com.google.android.exoplayer2.drm.DrmSessionManager;
 import com.google.android.exoplayer2.drm.ExoMediaCrypto;
@@ -40,26 +40,24 @@ public final class LibopusAudioRenderer extends SimpleDecoderAudioRenderer {
    * @param eventHandler A handler to use when delivering events to {@code eventListener}. May be
    *     null if delivery of events is not required.
    * @param eventListener A listener of events. May be null if delivery of events is not required.
-   * @param bufferProcessors Optional {@link BufferProcessor}s which will process PCM audio buffers
+   * @param audioProcessors Optional {@link AudioProcessor}s that will process audio before output.
-   *     before they are output.
    */
   public LibopusAudioRenderer(Handler eventHandler, AudioRendererEventListener eventListener,
-      BufferProcessor... bufferProcessors) {
+      AudioProcessor... audioProcessors) {
-    super(eventHandler, eventListener, bufferProcessors);
+    super(eventHandler, eventListener, audioProcessors);
   }
 
   /**
    * @param eventHandler A handler to use when delivering events to {@code eventListener}. May be
    *     null if delivery of events is not required.
    * @param eventListener A listener of events. May be null if delivery of events is not required.
-   * @param bufferProcessors Optional {@link BufferProcessor}s which will process PCM audio
+   * @param audioProcessors Optional {@link AudioProcessor}s that will process audio before output.
-   *     buffers before they are output.
    */
   public LibopusAudioRenderer(Handler eventHandler, AudioRendererEventListener eventListener,
       DrmSessionManager<ExoMediaCrypto> drmSessionManager, boolean playClearSamplesWithoutKeys,
-      BufferProcessor... bufferProcessors) {
+      AudioProcessor... audioProcessors) {
     super(eventHandler, eventListener, null, drmSessionManager, playClearSamplesWithoutKeys,
-        bufferProcessors);
+        audioProcessors);
   }
 
   @Override

library/src/main/java/com/google/android/exoplayer2/SimpleExoPlayer.java

@@ -28,8 +28,8 @@ import android.view.SurfaceHolder;
 import android.view.SurfaceView;
 import android.view.TextureView;
 import com.google.android.exoplayer2.audio.AudioCapabilities;
+import com.google.android.exoplayer2.audio.AudioProcessor;
 import com.google.android.exoplayer2.audio.AudioRendererEventListener;
-import com.google.android.exoplayer2.audio.BufferProcessor;
 import com.google.android.exoplayer2.audio.MediaCodecAudioRenderer;
 import com.google.android.exoplayer2.decoder.DecoderCounters;
 import com.google.android.exoplayer2.drm.DrmSessionManager;
@@ -625,7 +625,7 @@ public class SimpleExoPlayer implements ExoPlayer {
     buildVideoRenderers(context, mainHandler, drmSessionManager, extensionRendererMode,
         componentListener, allowedVideoJoiningTimeMs, out);
     buildAudioRenderers(context, mainHandler, drmSessionManager, extensionRendererMode,
-        componentListener, buildBufferProcessors(), out);
+        componentListener, buildAudioProcessors(), out);
     buildTextRenderers(context, mainHandler, extensionRendererMode, componentListener, out);
     buildMetadataRenderers(context, mainHandler, extensionRendererMode, componentListener, out);
     buildMiscellaneousRenderers(context, mainHandler, extensionRendererMode, out);
@@ -685,16 +685,16 @@ public class SimpleExoPlayer implements ExoPlayer {
    *     not be used for DRM protected playbacks.
    * @param extensionRendererMode The extension renderer mode.
    * @param eventListener An event listener.
-   * @param bufferProcessors An array of {@link BufferProcessor}s which will process PCM audio
+   * @param audioProcessors An array of {@link AudioProcessor}s that will process PCM audio buffers
-   *     buffers before they are output. May be empty.
+   *     before output. May be empty.
    * @param out An array to which the built renderers should be appended.
    */
   protected void buildAudioRenderers(Context context, Handler mainHandler,
       DrmSessionManager<FrameworkMediaCrypto> drmSessionManager,
       @ExtensionRendererMode int extensionRendererMode, AudioRendererEventListener eventListener,
-      BufferProcessor[] bufferProcessors, ArrayList<Renderer> out) {
+      AudioProcessor[] audioProcessors, ArrayList<Renderer> out) {
     out.add(new MediaCodecAudioRenderer(MediaCodecSelector.DEFAULT, drmSessionManager, true,
-        mainHandler, eventListener, AudioCapabilities.getCapabilities(context), bufferProcessors));
+        mainHandler, eventListener, AudioCapabilities.getCapabilities(context), audioProcessors));
 
     if (extensionRendererMode == EXTENSION_RENDERER_MODE_OFF) {
       return;
@@ -708,9 +708,9 @@ public class SimpleExoPlayer implements ExoPlayer {
       Class<?> clazz =
           Class.forName("com.google.android.exoplayer2.ext.opus.LibopusAudioRenderer");
       Constructor<?> constructor = clazz.getConstructor(Handler.class,
-          AudioRendererEventListener.class, BufferProcessor[].class);
+          AudioRendererEventListener.class, AudioProcessor[].class);
       Renderer renderer = (Renderer) constructor.newInstance(mainHandler, componentListener,
-          bufferProcessors);
+          audioProcessors);
       out.add(extensionRendererIndex++, renderer);
       Log.i(TAG, "Loaded LibopusAudioRenderer.");
     } catch (ClassNotFoundException e) {
@@ -723,9 +723,9 @@ public class SimpleExoPlayer implements ExoPlayer {
       Class<?> clazz =
           Class.forName("com.google.android.exoplayer2.ext.flac.LibflacAudioRenderer");
       Constructor<?> constructor = clazz.getConstructor(Handler.class,
-          AudioRendererEventListener.class, BufferProcessor[].class);
+          AudioRendererEventListener.class, AudioProcessor[].class);
       Renderer renderer = (Renderer) constructor.newInstance(mainHandler, componentListener,
-          bufferProcessors);
+          audioProcessors);
       out.add(extensionRendererIndex++, renderer);
       Log.i(TAG, "Loaded LibflacAudioRenderer.");
     } catch (ClassNotFoundException e) {
@@ -738,9 +738,9 @@ public class SimpleExoPlayer implements ExoPlayer {
       Class<?> clazz =
           Class.forName("com.google.android.exoplayer2.ext.ffmpeg.FfmpegAudioRenderer");
       Constructor<?> constructor = clazz.getConstructor(Handler.class,
-          AudioRendererEventListener.class, BufferProcessor[].class);
+          AudioRendererEventListener.class, AudioProcessor[].class);
       Renderer renderer = (Renderer) constructor.newInstance(mainHandler, componentListener,
-          bufferProcessors);
+          audioProcessors);
       out.add(extensionRendererIndex++, renderer);
       Log.i(TAG, "Loaded FfmpegAudioRenderer.");
     } catch (ClassNotFoundException e) {
@@ -794,11 +794,10 @@ public class SimpleExoPlayer implements ExoPlayer {
   }
 
   /**
-   * Builds an array of {@link BufferProcessor}s which will process PCM audio buffers before they
+   * Builds an array of {@link AudioProcessor}s that will process PCM audio before output.
-   * are output.
    */
-  protected BufferProcessor[] buildBufferProcessors() {
+  protected AudioProcessor[] buildAudioProcessors() {
-    return new BufferProcessor[0];
+    return new AudioProcessor[0];
   }
 
   // Internal methods.

library/src/main/java/com/google/android/exoplayer2/audio/AudioProcessor.java

@@ -20,12 +20,12 @@ import java.nio.ByteBuffer;
 import java.nio.ByteOrder;
 
 /**
- * Interface for processors of audio buffers.
+ * Interface for audio processors.
  */
-public interface BufferProcessor {
+public interface AudioProcessor {
 
   /**
-   * Exception thrown when a processor can't be configured for a given input format.
+   * Exception thrown when a processor can't be configured for a given input audio format.
    */
   final class UnhandledFormatException extends Exception {
 
@@ -42,7 +42,7 @@ public interface BufferProcessor {
   ByteBuffer EMPTY_BUFFER = ByteBuffer.allocateDirect(0).order(ByteOrder.nativeOrder());
 
   /**
-   * Configures the processor to process input buffers with the specified format. After calling this
+   * Configures the processor to process input audio with the specified format. After calling this
    * method, {@link #isActive()} returns whether the processor needs to handle buffers; if not, the
    * processor will not accept any buffers until it is reconfigured. Returns {@code true} if the
    * processor must be flushed, or if the value returned by {@link #isActive()} has changed as a
@@ -111,7 +111,7 @@ public interface BufferProcessor {
   boolean isEnded();
 
   /**
-   * Clears any state in preparation for receiving a new stream of buffers.
+   * Clears any state in preparation for receiving a new stream of input buffers.
    */
   void flush();
 

library/src/main/java/com/google/android/exoplayer2/audio/AudioTrack.java

@@ -270,8 +270,8 @@ public final class AudioTrack {
   public static boolean failOnSpuriousAudioTimestamp = false;
 
   private final AudioCapabilities audioCapabilities;
-  private final ChannelMappingBufferProcessor channelMappingBufferProcessor;
+  private final ChannelMappingAudioProcessor channelMappingAudioProcessor;
-  private final BufferProcessor[] availableBufferProcessors;
+  private final AudioProcessor[] availableAudioProcessors;
   private final Listener listener;
   private final ConditionVariable releasingConditionVariable;
   private final long[] playheadOffsets;
@@ -319,13 +319,13 @@ public final class AudioTrack {
   private long latencyUs;
   private float volume;
 
-  private BufferProcessor[] bufferProcessors;
+  private AudioProcessor[] audioProcessors;
   private ByteBuffer[] outputBuffers;
   private ByteBuffer inputBuffer;
   private ByteBuffer outputBuffer;
   private byte[] preV21OutputBuffer;
   private int preV21OutputBufferOffset;
-  private int drainingBufferProcessorIndex;
+  private int drainingAudioProcessorIndex;
   private boolean handledEndOfStream;
 
   private boolean playing;
@@ -337,18 +337,18 @@ public final class AudioTrack {
   /**
    * @param audioCapabilities The audio capabilities for playback on this device. May be null if the
    *     default capabilities (no encoded audio passthrough support) should be assumed.
-   * @param bufferProcessors An array of {@link BufferProcessor}s which will process PCM audio
+   * @param audioProcessors An array of {@link AudioProcessor}s that will process PCM audio before
-   *     buffers before they are output. May be empty.
+   *     output. May be empty.
    * @param listener Listener for audio track events.
    */
-  public AudioTrack(AudioCapabilities audioCapabilities, BufferProcessor[] bufferProcessors,
+  public AudioTrack(AudioCapabilities audioCapabilities, AudioProcessor[] audioProcessors,
       Listener listener) {
     this.audioCapabilities = audioCapabilities;
-    channelMappingBufferProcessor = new ChannelMappingBufferProcessor();
+    channelMappingAudioProcessor = new ChannelMappingAudioProcessor();
-    availableBufferProcessors = new BufferProcessor[bufferProcessors.length + 2];
+    availableAudioProcessors = new AudioProcessor[audioProcessors.length + 2];
-    availableBufferProcessors[0] = new ResamplingBufferProcessor();
+    availableAudioProcessors[0] = new ResamplingAudioProcessor();
-    availableBufferProcessors[1] = channelMappingBufferProcessor;
+    availableAudioProcessors[1] = channelMappingAudioProcessor;
-    System.arraycopy(bufferProcessors, 0, availableBufferProcessors, 2, bufferProcessors.length);
+    System.arraycopy(audioProcessors, 0, availableAudioProcessors, 2, audioProcessors.length);
     this.listener = listener;
     releasingConditionVariable = new ConditionVariable(true);
     if (Util.SDK_INT >= 18) {
@@ -371,8 +371,8 @@ public final class AudioTrack {
     startMediaTimeState = START_NOT_SET;
     streamType = C.STREAM_TYPE_DEFAULT;
     audioSessionId = C.AUDIO_SESSION_ID_UNSET;
-    drainingBufferProcessorIndex = C.INDEX_UNSET;
+    drainingAudioProcessorIndex = C.INDEX_UNSET;
-    this.bufferProcessors = new BufferProcessor[0];
+    this.audioProcessors = new AudioProcessor[0];
     outputBuffers = new ByteBuffer[0];
   }
 
@@ -482,32 +482,32 @@ public final class AudioTrack {
     if (!passthrough) {
       pcmFrameSize = Util.getPcmFrameSize(pcmEncoding, channelCount);
 
-      // Reconfigure the buffer processors.
+      // Reconfigure the audio processors.
-      channelMappingBufferProcessor.setChannelMap(outputChannels);
+      channelMappingAudioProcessor.setChannelMap(outputChannels);
-      ArrayList<BufferProcessor> newBufferProcessors = new ArrayList<>();
+      ArrayList<AudioProcessor> newAudioProcessors = new ArrayList<>();
-      for (BufferProcessor bufferProcessor : availableBufferProcessors) {
+      for (AudioProcessor audioProcessor : availableAudioProcessors) {
         try {
-          flush |= bufferProcessor.configure(sampleRate, channelCount, encoding);
+          flush |= audioProcessor.configure(sampleRate, channelCount, encoding);
-        } catch (BufferProcessor.UnhandledFormatException e) {
+        } catch (AudioProcessor.UnhandledFormatException e) {
           throw new ConfigurationException(e);
         }
-        if (bufferProcessor.isActive()) {
+        if (audioProcessor.isActive()) {
-          newBufferProcessors.add(bufferProcessor);
+          newAudioProcessors.add(audioProcessor);
-          channelCount = bufferProcessor.getOutputChannelCount();
+          channelCount = audioProcessor.getOutputChannelCount();
-          encoding = bufferProcessor.getOutputEncoding();
+          encoding = audioProcessor.getOutputEncoding();
         } else {
-          bufferProcessor.flush();
+          audioProcessor.flush();
         }
       }
 
       if (flush) {
-        int count = newBufferProcessors.size();
+        int count = newAudioProcessors.size();
-        bufferProcessors = newBufferProcessors.toArray(new BufferProcessor[count]);
+        audioProcessors = newAudioProcessors.toArray(new AudioProcessor[count]);
         outputBuffers = new ByteBuffer[count];
         for (int i = 0; i < count; i++) {
-          BufferProcessor bufferProcessor = bufferProcessors[i];
+          AudioProcessor audioProcessor = audioProcessors[i];
-          bufferProcessor.flush();
+          audioProcessor.flush();
-          outputBuffers[i] = bufferProcessor.getOutput();
+          outputBuffers[i] = audioProcessor.getOutput();
         }
       }
     }
@@ -787,20 +787,20 @@ public final class AudioTrack {
   }
 
   private void processBuffers(long avSyncPresentationTimeUs) throws WriteException {
-    int count = bufferProcessors.length;
+    int count = audioProcessors.length;
     int index = count;
     while (index >= 0) {
       ByteBuffer input = index > 0 ? outputBuffers[index - 1]
-          : (inputBuffer != null ? inputBuffer : BufferProcessor.EMPTY_BUFFER);
+          : (inputBuffer != null ? inputBuffer : AudioProcessor.EMPTY_BUFFER);
       if (index == count) {
         writeBuffer(input, avSyncPresentationTimeUs);
       } else {
-        BufferProcessor bufferProcessor = bufferProcessors[index];
+        AudioProcessor audioProcessor = audioProcessors[index];
-        bufferProcessor.queueInput(input);
+        audioProcessor.queueInput(input);
-        ByteBuffer output = bufferProcessor.getOutput();
+        ByteBuffer output = audioProcessor.getOutput();
         outputBuffers[index] = output;
         if (output.hasRemaining()) {
-          // Handle the output as input to the next buffer processor or the AudioTrack.
+          // Handle the output as input to the next audio processor or the AudioTrack.
           index++;
           continue;
         }
@@ -889,23 +889,23 @@ public final class AudioTrack {
       return;
     }
 
-    // Drain the buffer processors.
+    // Drain the audio processors.
-    boolean bufferProcessorNeedsEndOfStream = false;
+    boolean audioProcessorNeedsEndOfStream = false;
-    if (drainingBufferProcessorIndex == C.INDEX_UNSET) {
+    if (drainingAudioProcessorIndex == C.INDEX_UNSET) {
-      drainingBufferProcessorIndex = passthrough ? bufferProcessors.length : 0;
+      drainingAudioProcessorIndex = passthrough ? audioProcessors.length : 0;
-      bufferProcessorNeedsEndOfStream = true;
+      audioProcessorNeedsEndOfStream = true;
     }
-    while (drainingBufferProcessorIndex < bufferProcessors.length) {
+    while (drainingAudioProcessorIndex < audioProcessors.length) {
-      BufferProcessor bufferProcessor = bufferProcessors[drainingBufferProcessorIndex];
+      AudioProcessor audioProcessor = audioProcessors[drainingAudioProcessorIndex];
-      if (bufferProcessorNeedsEndOfStream) {
+      if (audioProcessorNeedsEndOfStream) {
-        bufferProcessor.queueEndOfStream();
+        audioProcessor.queueEndOfStream();
       }
       processBuffers(C.TIME_UNSET);
-      if (!bufferProcessor.isEnded()) {
+      if (!audioProcessor.isEnded()) {
         return;
       }
-      bufferProcessorNeedsEndOfStream = true;
+      audioProcessorNeedsEndOfStream = true;
-      drainingBufferProcessorIndex++;
+      drainingAudioProcessorIndex++;
     }
 
     // Finish writing any remaining output to the track.
@@ -989,8 +989,8 @@ public final class AudioTrack {
    * Enables tunneling. The audio track is reset if tunneling was previously disabled or if the
    * audio session id has changed. Enabling tunneling requires platform API version 21 onwards.
    * <p>
-   * If this instance has {@link BufferProcessor}s and tunneling is enabled, care must be taken that
+   * If this instance has {@link AudioProcessor}s and tunneling is enabled, care must be taken that
-   * buffer processors do not output buffers with a different duration than their input, and buffer
+   * audio processors do not output buffers with a different duration than their input, and buffer
    * processors must produce output corresponding to their last input immediately after that input
    * is queued.
    *
@@ -1067,13 +1067,13 @@ public final class AudioTrack {
       framesPerEncodedSample = 0;
       inputBuffer = null;
       outputBuffer = null;
-      for (int i = 0; i < bufferProcessors.length; i++) {
+      for (int i = 0; i < audioProcessors.length; i++) {
-        BufferProcessor bufferProcessor = bufferProcessors[i];
+        AudioProcessor audioProcessor = audioProcessors[i];
-        bufferProcessor.flush();
+        audioProcessor.flush();
-        outputBuffers[i] = bufferProcessor.getOutput();
+        outputBuffers[i] = audioProcessor.getOutput();
       }
       handledEndOfStream = false;
-      drainingBufferProcessorIndex = C.INDEX_UNSET;
+      drainingAudioProcessorIndex = C.INDEX_UNSET;
       avSyncHeader = null;
       bytesUntilNextAvSync = 0;
       startMediaTimeState = START_NOT_SET;
@@ -1108,8 +1108,8 @@ public final class AudioTrack {
   public void release() {
     reset();
     releaseKeepSessionIdAudioTrack();
-    for (BufferProcessor bufferProcessor : availableBufferProcessors) {
+    for (AudioProcessor audioProcessor : availableAudioProcessors) {
-      bufferProcessor.release();
+      audioProcessor.release();
     }
     audioSessionId = C.AUDIO_SESSION_ID_UNSET;
     playing = false;

library/src/main/java/com/google/android/exoplayer2/audio/ChannelMappingAudioProcessor.java

@@ -22,10 +22,10 @@ import java.nio.ByteOrder;
 import java.util.Arrays;
 
 /**
- * Buffer processor that applies a mapping from input channels onto specified output channels. This
+ * An {@link AudioProcessor} that applies a mapping from input channels onto specified output
- * can be used to reorder, duplicate or discard channels.
+ * channels. This can be used to reorder, duplicate or discard channels.
  */
-/* package */ final class ChannelMappingBufferProcessor implements BufferProcessor {
+/* package */ final class ChannelMappingAudioProcessor implements AudioProcessor {
 
   private int channelCount;
   private int sampleRateHz;
@@ -40,7 +40,7 @@ import java.util.Arrays;
   /**
    * Creates a new processor that applies a channel mapping.
    */
-  public ChannelMappingBufferProcessor() {
+  public ChannelMappingAudioProcessor() {
     buffer = EMPTY_BUFFER;
     outputBuffer = EMPTY_BUFFER;
   }

library/src/main/java/com/google/android/exoplayer2/audio/MediaCodecAudioRenderer.java

@@ -123,16 +123,16 @@ public class MediaCodecAudioRenderer extends MediaCodecRenderer implements Media
    * @param eventListener A listener of events. May be null if delivery of events is not required.
    * @param audioCapabilities The audio capabilities for playback on this device. May be null if the
    *     default capabilities (no encoded audio passthrough support) should be assumed.
-   * @param bufferProcessors Optional {@link BufferProcessor}s which will process PCM audio buffers
+   * @param audioProcessors Optional {@link AudioProcessor}s that will process PCM audio before
-   *     before they are output.
+   *     output.
    */
   public MediaCodecAudioRenderer(MediaCodecSelector mediaCodecSelector,
       DrmSessionManager<FrameworkMediaCrypto> drmSessionManager,
       boolean playClearSamplesWithoutKeys, Handler eventHandler,
       AudioRendererEventListener eventListener, AudioCapabilities audioCapabilities,
-      BufferProcessor... bufferProcessors) {
+      AudioProcessor... audioProcessors) {
     super(C.TRACK_TYPE_AUDIO, mediaCodecSelector, drmSessionManager, playClearSamplesWithoutKeys);
-    audioTrack = new AudioTrack(audioCapabilities, bufferProcessors, new AudioTrackListener());
+    audioTrack = new AudioTrack(audioCapabilities, audioProcessors, new AudioTrackListener());
     eventDispatcher = new EventDispatcher(eventHandler, eventListener);
   }
 

library/src/main/java/com/google/android/exoplayer2/audio/ResamplingAudioProcessor.java

@@ -21,9 +21,9 @@ import java.nio.ByteBuffer;
 import java.nio.ByteOrder;
 
 /**
- * A {@link BufferProcessor} that converts audio data to {@link C#ENCODING_PCM_16BIT}.
+ * An {@link AudioProcessor} that converts audio data to {@link C#ENCODING_PCM_16BIT}.
  */
-/* package */ final class ResamplingBufferProcessor implements BufferProcessor {
+/* package */ final class ResamplingAudioProcessor implements AudioProcessor {
 
   private int sampleRateHz;
   private int channelCount;
@@ -34,9 +34,9 @@ import java.nio.ByteOrder;
   private boolean inputEnded;
 
   /**
-   * Creates a new buffer processor that converts audio data to {@link C#ENCODING_PCM_16BIT}.
+   * Creates a new audio processor that converts audio data to {@link C#ENCODING_PCM_16BIT}.
    */
-  public ResamplingBufferProcessor() {
+  public ResamplingAudioProcessor() {
     sampleRateHz = Format.NO_VALUE;
     channelCount = Format.NO_VALUE;
     encoding = C.ENCODING_INVALID;

library/src/main/java/com/google/android/exoplayer2/audio/SimpleDecoderAudioRenderer.java

@@ -102,12 +102,11 @@ public abstract class SimpleDecoderAudioRenderer extends BaseRenderer implements
    * @param eventHandler A handler to use when delivering events to {@code eventListener}. May be
    *     null if delivery of events is not required.
    * @param eventListener A listener of events. May be null if delivery of events is not required.
-   * @param bufferProcessors Optional {@link BufferProcessor}s which will process PCM audio buffers
+   * @param audioProcessors Optional {@link AudioProcessor}s that will process audio before output.
-   *     before they are output.
    */
   public SimpleDecoderAudioRenderer(Handler eventHandler,
-      AudioRendererEventListener eventListener, BufferProcessor... bufferProcessors) {
+      AudioRendererEventListener eventListener, AudioProcessor... audioProcessors) {
-    this(eventHandler, eventListener, null, null, false, bufferProcessors);
+    this(eventHandler, eventListener, null, null, false, audioProcessors);
   }
 
   /**
@@ -135,18 +134,17 @@ public abstract class SimpleDecoderAudioRenderer extends BaseRenderer implements
    *     begin in parallel with key acquisition. This parameter specifies whether the renderer is
    *     permitted to play clear regions of encrypted media files before {@code drmSessionManager}
    *     has obtained the keys necessary to decrypt encrypted regions of the media.
-   * @param bufferProcessors Optional {@link BufferProcessor}s which will process PCM audio
+   * @param audioProcessors Optional {@link AudioProcessor}s that will process audio before output.
-   *     buffers before they are output.
    */
   public SimpleDecoderAudioRenderer(Handler eventHandler,
       AudioRendererEventListener eventListener, AudioCapabilities audioCapabilities,
       DrmSessionManager<ExoMediaCrypto> drmSessionManager, boolean playClearSamplesWithoutKeys,
-      BufferProcessor... bufferProcessors) {
+      AudioProcessor... audioProcessors) {
     super(C.TRACK_TYPE_AUDIO);
     this.drmSessionManager = drmSessionManager;
     this.playClearSamplesWithoutKeys = playClearSamplesWithoutKeys;
     eventDispatcher = new EventDispatcher(eventHandler, eventListener);
-    audioTrack = new AudioTrack(audioCapabilities, bufferProcessors, new AudioTrackListener());
+    audioTrack = new AudioTrack(audioCapabilities, audioProcessors, new AudioTrackListener());
     formatHolder = new FormatHolder();
     flagsOnlyBuffer = new DecoderInputBuffer(DecoderInputBuffer.BUFFER_REPLACEMENT_MODE_DISABLED);
     decoderReinitializationState = REINITIALIZATION_STATE_NONE;