Remove AudioTrack API level 16 dependency.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=121685491

library/src/main/java/com/google/android/exoplayer/MediaCodecAudioTrackRenderer.java

@@ -237,7 +237,13 @@ public class MediaCodecAudioTrackRenderer extends MediaCodecTrackRenderer implem
   @Override
   @Override
   protected void onOutputFormatChanged(MediaCodec codec, MediaFormat outputFormat) {
   protected void onOutputFormatChanged(MediaCodec codec, MediaFormat outputFormat) {
     boolean passthrough = passthroughMediaFormat != null;
     boolean passthrough = passthroughMediaFormat != null;
-    audioTrack.configure(passthrough ? passthroughMediaFormat : outputFormat, passthrough);
+    String mimeType = passthrough
+        ? passthroughMediaFormat.getString(android.media.MediaFormat.KEY_MIME)
+        : MimeTypes.AUDIO_RAW;
+    android.media.MediaFormat format = passthrough ? passthroughMediaFormat : outputFormat;
+    int channelCount = format.getInteger(android.media.MediaFormat.KEY_CHANNEL_COUNT);
+    int sampleRate = format.getInteger(android.media.MediaFormat.KEY_SAMPLE_RATE);
+    audioTrack.configure(mimeType, channelCount, sampleRate);
   }
   }
 
 
   /**
   /**

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

@@ -26,7 +26,6 @@ import android.annotation.TargetApi;
 import android.media.AudioFormat;
 import android.media.AudioFormat;
 import android.media.AudioManager;
 import android.media.AudioManager;
 import android.media.AudioTimestamp;
 import android.media.AudioTimestamp;
-import android.media.MediaFormat;
 import android.media.PlaybackParams;
 import android.media.PlaybackParams;
 import android.os.ConditionVariable;
 import android.os.ConditionVariable;
 import android.os.SystemClock;
 import android.os.SystemClock;
@@ -57,7 +56,6 @@ import java.nio.ByteBuffer;
  * <p>
  * <p>
  * Call {@link #release()} when the instance will no longer be used.
  * Call {@link #release()} when the instance will no longer be used.
  */
  */
-@TargetApi(16)
 public final class AudioTrack {
 public final class AudioTrack {
 
 
   /**
   /**
@@ -333,26 +331,27 @@ public final class AudioTrack {
   }
   }
 
 
   /**
   /**
-   * Configures (or reconfigures) the audio track to play back media in {@code format}, inferring a
-   * buffer size from the format.
+   * Configures (or reconfigures) the audio track, inferring a suitable buffer size automatically.
    *
    *
-   * @param format Specifies the channel count and sample rate to play back.
-   * @param passthrough Whether to play back using a passthrough encoding.
+   * @param mimeType The mime type.
+   * @param channelCount The number of channels.
+   * @param sampleRate The sample rate in Hz.
    */
    */
-  public void configure(MediaFormat format, boolean passthrough) {
-    configure(format, passthrough, 0);
+  public void configure(String mimeType, int channelCount, int sampleRate) {
+    configure(mimeType, channelCount, sampleRate, 0);
   }
   }
 
 
   /**
   /**
-   * Configures (or reconfigures) the audio track to play back media in {@code format}.
+   * Configures (or reconfigures) the audio track.
    *
    *
-   * @param format Specifies the channel count and sample rate to play back.
-   * @param passthrough Whether to play back using a passthrough encoding.
-   * @param specifiedBufferSize A specific size for the playback buffer in bytes, or 0 to use a
-   *     size inferred from the format.
+   * @param mimeType The mime type.
+   * @param channelCount The number of channels.
+   * @param sampleRate The sample rate in Hz.
+   * @param specifiedBufferSize A specific size for the playback buffer in bytes, or 0 to infer a
+   *     suitable buffer size automatically.
    */
    */
-  public void configure(MediaFormat format, boolean passthrough, int specifiedBufferSize) {
-    int channelCount = format.getInteger(MediaFormat.KEY_CHANNEL_COUNT);
+  public void configure(String mimeType, int channelCount, int sampleRate,
+      int specifiedBufferSize) {
     int channelConfig;
     int channelConfig;
     switch (channelCount) {
     switch (channelCount) {
       case 1:
       case 1:
@@ -382,8 +381,7 @@ public final class AudioTrack {
       default:
       default:
         throw new IllegalArgumentException("Unsupported channel count: " + channelCount);
         throw new IllegalArgumentException("Unsupported channel count: " + channelCount);
     }
     }
-    int sampleRate = format.getInteger(MediaFormat.KEY_SAMPLE_RATE);
-    String mimeType = format.getString(MediaFormat.KEY_MIME);
+    boolean passthrough = !MimeTypes.AUDIO_RAW.equals(mimeType);
     int encoding = passthrough ? getEncodingForMimeType(mimeType) : AudioFormat.ENCODING_PCM_16BIT;
     int encoding = passthrough ? getEncodingForMimeType(mimeType) : AudioFormat.ENCODING_PCM_16BIT;
     if (isInitialized() && this.sampleRate == sampleRate && this.channelConfig == channelConfig
     if (isInitialized() && this.sampleRate == sampleRate && this.channelConfig == channelConfig
         && this.encoding == encoding) {
         && this.encoding == encoding) {
@@ -543,7 +541,7 @@ public final class AudioTrack {
    * <p>
    * <p>
    * If the data was not written in full then the same {@link ByteBuffer} must be provided to
    * If the data was not written in full then the same {@link ByteBuffer} must be provided to
    * subsequent calls until it has been fully consumed, except in the case of an interleaving call
    * subsequent calls until it has been fully consumed, except in the case of an interleaving call
-   * to {@link #configure(MediaFormat, boolean)} or {@link #reset}.
+   * to {@link #configure} or {@link #reset}.
    *
    *
    * @param buffer The buffer containing audio data to play back.
    * @param buffer The buffer containing audio data to play back.
    * @param presentationTimeUs Presentation timestamp of the next buffer in microseconds.
    * @param presentationTimeUs Presentation timestamp of the next buffer in microseconds.

library/src/main/java/com/google/android/exoplayer/util/extensions/AudioDecoderTrackRenderer.java

@@ -27,6 +27,7 @@ import com.google.android.exoplayer.MediaClock;
 import com.google.android.exoplayer.TrackRenderer;
 import com.google.android.exoplayer.TrackRenderer;
 import com.google.android.exoplayer.TrackStream;
 import com.google.android.exoplayer.TrackStream;
 import com.google.android.exoplayer.audio.AudioTrack;
 import com.google.android.exoplayer.audio.AudioTrack;
+import com.google.android.exoplayer.util.MimeTypes;
 
 
 import android.os.Handler;
 import android.os.Handler;
 
 
@@ -291,7 +292,7 @@ public abstract class AudioDecoderTrackRenderer extends TrackRenderer implements
     int result = readSource(formatHolder, null);
     int result = readSource(formatHolder, null);
     if (result == TrackStream.FORMAT_READ) {
     if (result == TrackStream.FORMAT_READ) {
       format = formatHolder.format;
       format = formatHolder.format;
-      audioTrack.configure(format.getFrameworkMediaFormatV16(), false);
+      audioTrack.configure(MimeTypes.AUDIO_RAW, format.channelCount, format.sampleRate);
       return true;
       return true;
     }
     }
     return false;
     return false;