Add WavHeader.samplesPerBlock (currently always == 1)

PiperOrigin-RevId: 284961417

library/core/src/main/java/com/google/android/exoplayer2/extractor/wav/WavHeader.java

@@ -33,6 +33,8 @@ import com.google.android.exoplayer2.util.Util;
   private final int blockAlignment;
   private final int blockAlignment;
   /** Bits per sample for the audio data. */
   /** Bits per sample for the audio data. */
   private final int bitsPerSample;
   private final int bitsPerSample;
+  /** Number of samples in each block. */
+  private final int samplesPerBlock;
   /** The PCM encoding. */
   /** The PCM encoding. */
   @C.PcmEncoding private final int encoding;
   @C.PcmEncoding private final int encoding;
 
 
@@ -47,12 +49,14 @@ import com.google.android.exoplayer2.util.Util;
       int averageBytesPerSecond,
       int averageBytesPerSecond,
       int blockAlignment,
       int blockAlignment,
       int bitsPerSample,
       int bitsPerSample,
+      int samplesPerBlock,
       @C.PcmEncoding int encoding) {
       @C.PcmEncoding int encoding) {
     this.numChannels = numChannels;
     this.numChannels = numChannels;
     this.sampleRateHz = sampleRateHz;
     this.sampleRateHz = sampleRateHz;
     this.averageBytesPerSecond = averageBytesPerSecond;
     this.averageBytesPerSecond = averageBytesPerSecond;
     this.blockAlignment = blockAlignment;
     this.blockAlignment = blockAlignment;
     this.bitsPerSample = bitsPerSample;
     this.bitsPerSample = bitsPerSample;
+    this.samplesPerBlock = samplesPerBlock;
     this.encoding = encoding;
     this.encoding = encoding;
     dataStartPosition = C.POSITION_UNSET;
     dataStartPosition = C.POSITION_UNSET;
     dataEndPosition = C.POSITION_UNSET;
     dataEndPosition = C.POSITION_UNSET;
@@ -101,8 +105,8 @@ import com.google.android.exoplayer2.util.Util;
 
 
   @Override
   @Override
   public long getDurationUs() {
   public long getDurationUs() {
-    long numFrames = (dataEndPosition - dataStartPosition) / blockAlignment;
-    return (numFrames * C.MICROS_PER_SECOND) / sampleRateHz;
+    long numBlocks = (dataEndPosition - dataStartPosition) / blockAlignment;
+    return numBlocks * samplesPerBlock * C.MICROS_PER_SECOND / sampleRateHz;
   }
   }
 
 
   @Override
   @Override
@@ -157,6 +161,11 @@ import com.google.android.exoplayer2.util.Util;
     return numChannels;
     return numChannels;
   }
   }
 
 
+  /** Returns the number of samples in each block. */
+  public int getSamplesPerBlock() {
+    return samplesPerBlock;
+  }
+
   /** Returns the PCM encoding. **/
   /** Returns the PCM encoding. **/
   public @C.PcmEncoding int getEncoding() {
   public @C.PcmEncoding int getEncoding() {
     return encoding;
     return encoding;

library/core/src/main/java/com/google/android/exoplayer2/extractor/wav/WavHeaderReader.java

@@ -94,7 +94,13 @@ import java.io.IOException;
     input.advancePeekPosition((int) chunkHeader.size - 16);
     input.advancePeekPosition((int) chunkHeader.size - 16);
 
 
     return new WavHeader(
     return new WavHeader(
-        numChannels, sampleRateHz, averageBytesPerSecond, blockAlignment, bitsPerSample, encoding);
+        numChannels,
+        sampleRateHz,
+        averageBytesPerSecond,
+        blockAlignment,
+        bitsPerSample,
+        /* samplesPerBlock= */ 1,
+        encoding);
   }
   }
 
 
   /**
   /**
@@ -182,7 +188,7 @@ import java.io.IOException;
      */
      */
     public static ChunkHeader peek(ExtractorInput input, ParsableByteArray scratch)
     public static ChunkHeader peek(ExtractorInput input, ParsableByteArray scratch)
         throws IOException, InterruptedException {
         throws IOException, InterruptedException {
-      input.peekFully(scratch.data, 0, SIZE_IN_BYTES);
+      input.peekFully(scratch.data, /* offset= */ 0, /* length= */ SIZE_IN_BYTES);
       scratch.setPosition(0);
       scratch.setPosition(0);
 
 
       int id = scratch.readInt();
       int id = scratch.readInt();