Fix usage of 'samples' vs 'frames' for gapless

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=191704629

library/core/src/main/java/com/google/android/exoplayer2/Format.java

@@ -145,12 +145,12 @@ public final class Format implements Parcelable {
   @C.PcmEncoding
   public final int pcmEncoding;
   /**
-   * The number of samples to trim from the start of the decoded audio stream, or 0 if not
+   * The number of frames to trim from the start of the decoded audio stream, or 0 if not
    * applicable.
    */
   public final int encoderDelay;
   /**
-   * The number of samples to trim from the end of the decoded audio stream, or 0 if not applicable.
+   * The number of frames to trim from the end of the decoded audio stream, or 0 if not applicable.
    */
   public final int encoderPadding;
 

library/core/src/main/java/com/google/android/exoplayer2/audio/AudioSink.java

@@ -192,17 +192,23 @@ public interface AudioSink {
    * @param outputChannels A mapping from input to output channels that is applied to this sink's
    *     input as a preprocessing step, if handling PCM input. Specify {@code null} to leave the
    *     input unchanged. Otherwise, the element at index {@code i} specifies index of the input
-   *     channel to map to output channel {@code i} when preprocessing input buffers. After the
-   *     map is applied the audio data will have {@code outputChannels.length} channels.
-   * @param trimStartSamples The number of audio samples to trim from the start of data written to
-   *     the sink after this call.
-   * @param trimEndSamples The number of audio samples to trim from data written to the sink
+   *     channel to map to output channel {@code i} when preprocessing input buffers. After the map
+   *     is applied the audio data will have {@code outputChannels.length} channels.
+   * @param trimStartFrames The number of audio frames to trim from the start of data written to the
+   *     sink after this call.
+   * @param trimEndFrames The number of audio frames to trim from data written to the sink
    *     immediately preceding the next call to {@link #reset()} or this method.
    * @throws ConfigurationException If an error occurs configuring the sink.
    */
-  void configure(@C.Encoding int inputEncoding, int inputChannelCount, int inputSampleRate,
-      int specifiedBufferSize, @Nullable int[] outputChannels, int trimStartSamples,
-      int trimEndSamples) throws ConfigurationException;
+  void configure(
+      @C.Encoding int inputEncoding,
+      int inputChannelCount,
+      int inputSampleRate,
+      int specifiedBufferSize,
+      @Nullable int[] outputChannels,
+      int trimStartFrames,
+      int trimEndFrames)
+      throws ConfigurationException;
 
   /**
    * Starts or resumes consuming audio if initialized.

library/core/src/main/java/com/google/android/exoplayer2/audio/DefaultAudioSink.java

@@ -278,9 +278,15 @@ public final class DefaultAudioSink implements AudioSink {
   }
 
   @Override
-  public void configure(@C.Encoding int inputEncoding, int inputChannelCount, int inputSampleRate,
-      int specifiedBufferSize, @Nullable int[] outputChannels, int trimStartSamples,
-      int trimEndSamples) throws ConfigurationException {
+  public void configure(
+      @C.Encoding int inputEncoding,
+      int inputChannelCount,
+      int inputSampleRate,
+      int specifiedBufferSize,
+      @Nullable int[] outputChannels,
+      int trimStartFrames,
+      int trimEndFrames)
+      throws ConfigurationException {
     boolean flush = false;
     this.inputSampleRate = inputSampleRate;
     int channelCount = inputChannelCount;
@@ -297,7 +303,7 @@ public final class DefaultAudioSink implements AudioSink {
     boolean processingEnabled = isInputPcm && inputEncoding != C.ENCODING_PCM_FLOAT;
     canApplyPlaybackParameters = processingEnabled && !shouldConvertHighResIntPcmToFloat;
     if (processingEnabled) {
-      trimmingAudioProcessor.setTrimSampleCount(trimStartSamples, trimEndSamples);
+      trimmingAudioProcessor.setTrimFrameCount(trimStartFrames, trimEndFrames);
       channelMappingAudioProcessor.setChannelMap(outputChannels);
       for (AudioProcessor audioProcessor : getAvailableAudioProcessors()) {
         try {

library/core/src/main/java/com/google/android/exoplayer2/audio/TrimmingAudioProcessor.java

@@ -26,8 +26,8 @@ import java.nio.ByteOrder;
 /* package */ final class TrimmingAudioProcessor implements AudioProcessor {
 
   private boolean isActive;
-  private int trimStartSamples;
-  private int trimEndSamples;
+  private int trimStartFrames;
+  private int trimEndFrames;
   private int channelCount;
   private int sampleRateHz;
 
@@ -48,17 +48,17 @@ import java.nio.ByteOrder;
   }
 
   /**
-   * Sets the number of audio samples to trim from the start and end of audio passed to this
+   * Sets the number of audio frames to trim from the start and end of audio passed to this
    * processor. After calling this method, call {@link #configure(int, int, int)} to apply the new
-   * trimming sample counts.
+   * trimming frame counts.
    *
-   * @param trimStartSamples The number of audio samples to trim from the start of audio.
-   * @param trimEndSamples The number of audio samples to trim from the end of audio.
+   * @param trimStartFrames The number of audio frames to trim from the start of audio.
+   * @param trimEndFrames The number of audio frames to trim from the end of audio.
    * @see AudioSink#configure(int, int, int, int, int[], int, int)
    */
-  public void setTrimSampleCount(int trimStartSamples, int trimEndSamples) {
-    this.trimStartSamples = trimStartSamples;
-    this.trimEndSamples = trimEndSamples;
+  public void setTrimFrameCount(int trimStartFrames, int trimEndFrames) {
+    this.trimStartFrames = trimStartFrames;
+    this.trimEndFrames = trimEndFrames;
   }
 
   @Override
@@ -69,11 +69,11 @@ import java.nio.ByteOrder;
     }
     this.channelCount = channelCount;
     this.sampleRateHz = sampleRateHz;
-    endBuffer = new byte[trimEndSamples * channelCount * 2];
+    endBuffer = new byte[trimEndFrames * channelCount * 2];
     endBufferSize = 0;
-    pendingTrimStartBytes = trimStartSamples * channelCount * 2;
+    pendingTrimStartBytes = trimStartFrames * channelCount * 2;
     boolean wasActive = isActive;
-    isActive = trimStartSamples != 0 || trimEndSamples != 0;
+    isActive = trimStartFrames != 0 || trimEndFrames != 0;
     return wasActive != isActive;
   }