Merge pull request #310 from google/dev

dev -> dev-webm-vp9-opus

CONTRIBUTING.md

@@ -3,9 +3,11 @@
 We'd love to hear your feedback. Please open new issues describing any bugs,
 feature requests or suggestions that you have.
 
-We are not actively looking to accept patches to this project at the current
-time, however in some cases we may do so. For such cases, please see the
-agreement below.
+We will also consider high quality pull requests. These should normally merge
+into the [dev][] branch rather than master. To contribute in this way you must
+first submit a Contributor License Agreement, as described below.
+
+[dev]: https://github.com/google/ExoPlayer/tree/dev
 
 
 ## Contributor License Agreement ##

demo/src/main/AndroidManifest.xml

@@ -16,8 +16,8 @@
 
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.google.android.exoplayer.demo"
-    android:versionCode="1200"
-    android:versionName="1.2.00"
+    android:versionCode="1300"
+    android:versionName="1.3.00"
     android:theme="@style/RootTheme">
 
   <uses-permission android:name="android.permission.INTERNET"/>

demo/src/main/java/com/google/android/exoplayer/demo/Samples.java

@@ -117,9 +117,12 @@ import java.util.Locale;
     new Sample("Apple master playlist advanced",
         "https://devimages.apple.com.edgekey.net/streaming/examples/bipbop_16x9/"
         + "bipbop_16x9_variant.m3u8", DemoUtil.TYPE_HLS),
-    new Sample("Apple single media playlist",
+    new Sample("Apple TS media playlist",
         "https://devimages.apple.com.edgekey.net/streaming/examples/bipbop_4x3/gear1/"
         + "prog_index.m3u8", DemoUtil.TYPE_HLS),
+    new Sample("Apple AAC media playlist",
+        "https://devimages.apple.com.edgekey.net/streaming/examples/bipbop_4x3/gear0/"
+        + "prog_index.m3u8", DemoUtil.TYPE_HLS),
   };
 
   public static final Sample[] MISC = new Sample[] {

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

@@ -26,7 +26,7 @@ public class ExoPlayerLibraryInfo {
   /**
    * The version of the library, expressed as a string.
    */
-  public static final String VERSION = "1.2.0";
+  public static final String VERSION = "1.3.0";
 
   /**
    * The version of the library, expressed as an integer.
@@ -34,7 +34,7 @@ public class ExoPlayerLibraryInfo {
    * Three digits are used for each component of {@link #VERSION}. For example "1.2.3" has the
    * corresponding integer version 001002003.
    */
-  public static final int VERSION_INT = 001002000;
+  public static final int VERSION_INT = 001003000;
 
   /**
    * Whether the library was compiled with {@link com.google.android.exoplayer.util.Assertions}

library/src/main/java/com/google/android/exoplayer/chunk/ChunkSampleSource.java

@@ -417,7 +417,7 @@ public class ChunkSampleSource implements SampleSource, Loader.Callback {
     if (currentLoadable != null && mediaChunk == currentLoadable) {
       // Linearly interpolate partially-fetched chunk times.
       long chunkLength = mediaChunk.getLength();
-      if (chunkLength != C.LENGTH_UNBOUNDED) {
+      if (chunkLength != C.LENGTH_UNBOUNDED && chunkLength != 0) {
         return mediaChunk.startTimeUs + ((mediaChunk.endTimeUs - mediaChunk.startTimeUs) *
             mediaChunk.bytesLoaded()) / chunkLength;
       } else {

library/src/main/java/com/google/android/exoplayer/hls/HlsChunkSource.java

@@ -17,6 +17,8 @@ package com.google.android.exoplayer.hls;
 
 import com.google.android.exoplayer.C;
 import com.google.android.exoplayer.MediaFormat;
+import com.google.android.exoplayer.hls.parser.AdtsExtractor;
+import com.google.android.exoplayer.hls.parser.HlsExtractor;
 import com.google.android.exoplayer.hls.parser.TsExtractor;
 import com.google.android.exoplayer.upstream.Aes128DataSource;
 import com.google.android.exoplayer.upstream.BandwidthMeter;
@@ -105,6 +107,7 @@ public class HlsChunkSource {
   public static final long DEFAULT_MAX_BUFFER_TO_SWITCH_DOWN_MS = 20000;
 
   private static final String TAG = "HlsChunkSource";
+  private static final String AAC_FILE_EXTENSION = ".aac";
   private static final float BANDWIDTH_FRACTION = 0.8f;
 
   private final BufferPool bufferPool;
@@ -332,9 +335,11 @@ public class HlsChunkSource {
     boolean isLastChunk = !mediaPlaylist.live && chunkIndex == mediaPlaylist.segments.size() - 1;
 
     // Configure the extractor that will read the chunk.
-    TsExtractor extractor;
+    HlsExtractor extractor;
     if (previousTsChunk == null || segment.discontinuity || switchingVariant || liveDiscontinuity) {
-      extractor = new TsExtractor(startTimeUs, switchingVariantSpliced, bufferPool);
+      extractor = chunkUri.getLastPathSegment().endsWith(AAC_FILE_EXTENSION)
+          ? new AdtsExtractor(switchingVariantSpliced, startTimeUs, bufferPool)
+          : new TsExtractor(switchingVariantSpliced, startTimeUs, bufferPool);
     } else {
       extractor = previousTsChunk.extractor;
     }

library/src/main/java/com/google/android/exoplayer/hls/HlsPlaylistParser.java

@@ -60,7 +60,7 @@ public final class HlsPlaylistParser implements ManifestParser<HlsPlaylist> {
   private static final Pattern BANDWIDTH_ATTR_REGEX =
       Pattern.compile(BANDWIDTH_ATTR + "=(\\d+)\\b");
   private static final Pattern CODECS_ATTR_REGEX =
-      Pattern.compile(CODECS_ATTR + "=\"(.+)\"");
+      Pattern.compile(CODECS_ATTR + "=\"(.+?)\"");
   private static final Pattern RESOLUTION_ATTR_REGEX =
       Pattern.compile(RESOLUTION_ATTR + "=(\\d+x\\d+)");
 

library/src/main/java/com/google/android/exoplayer/hls/HlsSampleSource.java

@@ -21,7 +21,7 @@ import com.google.android.exoplayer.SampleHolder;
 import com.google.android.exoplayer.SampleSource;
 import com.google.android.exoplayer.TrackInfo;
 import com.google.android.exoplayer.TrackRenderer;
-import com.google.android.exoplayer.hls.parser.TsExtractor;
+import com.google.android.exoplayer.hls.parser.HlsExtractor;
 import com.google.android.exoplayer.upstream.Loader;
 import com.google.android.exoplayer.upstream.Loader.Loadable;
 import com.google.android.exoplayer.util.Assertions;
@@ -44,7 +44,7 @@ public class HlsSampleSource implements SampleSource, Loader.Callback {
   private static final int NO_RESET_PENDING = -1;
 
   private final HlsChunkSource chunkSource;
-  private final LinkedList<TsExtractor> extractors;
+  private final LinkedList<HlsExtractor> extractors;
   private final boolean frameAccurateSeeking;
   private final int minLoadableRetryCount;
 
@@ -83,7 +83,7 @@ public class HlsSampleSource implements SampleSource, Loader.Callback {
     this.frameAccurateSeeking = frameAccurateSeeking;
     this.remainingReleaseCount = downstreamRendererCount;
     this.minLoadableRetryCount = minLoadableRetryCount;
-    extractors = new LinkedList<TsExtractor>();
+    extractors = new LinkedList<HlsExtractor>();
   }
 
   @Override
@@ -96,7 +96,7 @@ public class HlsSampleSource implements SampleSource, Loader.Callback {
     }
     continueBufferingInternal();
     if (!extractors.isEmpty()) {
-      TsExtractor extractor = extractors.getFirst();
+      HlsExtractor extractor = extractors.getFirst();
       if (extractor.isPrepared()) {
         trackCount = extractor.getTrackCount();
         trackEnabledStates = new boolean[trackCount];
@@ -195,7 +195,7 @@ public class HlsSampleSource implements SampleSource, Loader.Callback {
       return NOTHING_READ;
     }
 
-    TsExtractor extractor = getCurrentExtractor();
+    HlsExtractor extractor = getCurrentExtractor();
     if (extractors.size() > 1) {
       // If there's more than one extractor, attempt to configure a seamless splice from the
       // current one to the next one.
@@ -328,8 +328,8 @@ public class HlsSampleSource implements SampleSource, Loader.Callback {
    *
    * @return The current extractor from which samples should be read. Guaranteed to be non-null.
    */
-  private TsExtractor getCurrentExtractor() {
-    TsExtractor extractor = extractors.getFirst();
+  private HlsExtractor getCurrentExtractor() {
+    HlsExtractor extractor = extractors.getFirst();
     while (extractors.size() > 1 && !haveSamplesForEnabledTracks(extractor)) {
       // We're finished reading from the extractor for all tracks, and so can discard it.
       extractors.removeFirst().release();
@@ -338,7 +338,7 @@ public class HlsSampleSource implements SampleSource, Loader.Callback {
     return extractor;
   }
 
-  private void discardSamplesForDisabledTracks(TsExtractor extractor, long timeUs) {
+  private void discardSamplesForDisabledTracks(HlsExtractor extractor, long timeUs) {
     if (!extractor.isPrepared()) {
       return;
     }
@@ -349,7 +349,7 @@ public class HlsSampleSource implements SampleSource, Loader.Callback {
     }
   }
 
-  private boolean haveSamplesForEnabledTracks(TsExtractor extractor) {
+  private boolean haveSamplesForEnabledTracks(HlsExtractor extractor) {
     if (!extractor.isPrepared()) {
       return false;
     }

library/src/main/java/com/google/android/exoplayer/hls/TsChunk.java

@@ -15,7 +15,7 @@
  */
 package com.google.android.exoplayer.hls;
 
-import com.google.android.exoplayer.hls.parser.TsExtractor;
+import com.google.android.exoplayer.hls.parser.HlsExtractor;
 import com.google.android.exoplayer.upstream.DataSource;
 import com.google.android.exoplayer.upstream.DataSpec;
 
@@ -51,7 +51,7 @@ public final class TsChunk extends HlsChunk {
   /**
    * The extractor into which this chunk is being consumed.
    */
-  public final TsExtractor extractor;
+  public final HlsExtractor extractor;
 
   private int loadPosition;
   private volatile boolean loadFinished;
@@ -60,16 +60,17 @@ public final class TsChunk extends HlsChunk {
   /**
    * @param dataSource A {@link DataSource} for loading the data.
    * @param dataSpec Defines the data to be loaded.
+   * @param extractor An extractor to parse samples from the data.
    * @param variantIndex The index of the variant in the master playlist.
    * @param startTimeUs The start time of the media contained by the chunk, in microseconds.
    * @param endTimeUs The end time of the media contained by the chunk, in microseconds.
    * @param chunkIndex The index of the chunk.
    * @param isLastChunk True if this is the last chunk in the media. False otherwise.
    */
-  public TsChunk(DataSource dataSource, DataSpec dataSpec, TsExtractor tsExtractor,
+  public TsChunk(DataSource dataSource, DataSpec dataSpec, HlsExtractor extractor,
       int variantIndex, long startTimeUs, long endTimeUs, int chunkIndex, boolean isLastChunk) {
     super(dataSource, dataSpec);
-    this.extractor = tsExtractor;
+    this.extractor = extractor;
     this.variantIndex = variantIndex;
     this.startTimeUs = startTimeUs;
     this.endTimeUs = endTimeUs;

library/src/main/java/com/google/android/exoplayer/hls/parser/AdtsExtractor.java

+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.google.android.exoplayer.hls.parser;
+
+import com.google.android.exoplayer.MediaFormat;
+import com.google.android.exoplayer.SampleHolder;
+import com.google.android.exoplayer.upstream.BufferPool;
+import com.google.android.exoplayer.upstream.DataSource;
+import com.google.android.exoplayer.util.Assertions;
+import com.google.android.exoplayer.util.ParsableByteArray;
+
+import java.io.IOException;
+
+/**
+ * Facilitates the extraction of AAC samples from elementary audio files formatted as AAC with ADTS
+ * headers.
+ */
+public class AdtsExtractor extends HlsExtractor {
+
+  private static final int MAX_PACKET_SIZE = 200;
+
+  private final long firstSampleTimestamp;
+  private final ParsableByteArray packetBuffer;
+  private final AdtsReader adtsReader;
+
+  // Accessed only by the loading thread.
+  private boolean firstPacket;
+  // Accessed by both the loading and consuming threads.
+  private volatile boolean prepared;
+
+  public AdtsExtractor(boolean shouldSpliceIn, long firstSampleTimestamp, BufferPool bufferPool) {
+    super(shouldSpliceIn);
+    this.firstSampleTimestamp = firstSampleTimestamp;
+    packetBuffer = new ParsableByteArray(MAX_PACKET_SIZE);
+    adtsReader = new AdtsReader(bufferPool);
+    firstPacket = true;
+  }
+
+  @Override
+  public int getTrackCount() {
+    Assertions.checkState(prepared);
+    return 1;
+  }
+
+  @Override
+  public MediaFormat getFormat(int track) {
+    Assertions.checkState(prepared);
+    return adtsReader.getMediaFormat();
+  }
+
+  @Override
+  public boolean isPrepared() {
+    return prepared;
+  }
+
+  @Override
+  public void release() {
+    adtsReader.release();
+  }
+
+  @Override
+  public long getLargestSampleTimestamp() {
+    return adtsReader.getLargestParsedTimestampUs();
+  }
+
+  @Override
+  public boolean getSample(int track, SampleHolder holder) {
+    Assertions.checkState(prepared);
+    Assertions.checkState(track == 0);
+    return adtsReader.getSample(holder);
+  }
+
+  @Override
+  public void discardUntil(int track, long timeUs) {
+    Assertions.checkState(prepared);
+    Assertions.checkState(track == 0);
+    adtsReader.discardUntil(timeUs);
+  }
+
+  @Override
+  public boolean hasSamples(int track) {
+    Assertions.checkState(prepared);
+    Assertions.checkState(track == 0);
+    return !adtsReader.isEmpty();
+  }
+
+  @Override
+  public int read(DataSource dataSource) throws IOException {
+    int bytesRead = dataSource.read(packetBuffer.data, 0, MAX_PACKET_SIZE);
+    if (bytesRead == -1) {
+      return -1;
+    }
+
+    packetBuffer.setPosition(0);
+    packetBuffer.setLimit(bytesRead);
+
+    // TODO: Make it possible for adtsReader to consume the dataSource directly, so that it becomes
+    // unnecessary to copy the data through packetBuffer.
+    adtsReader.consume(packetBuffer, firstSampleTimestamp, firstPacket);
+    firstPacket = false;
+    if (!prepared) {
+      prepared = adtsReader.hasMediaFormat();
+    }
+    return bytesRead;
+  }
+
+  @Override
+  protected SampleQueue getSampleQueue(int track) {
+    Assertions.checkState(track == 0);
+    return adtsReader;
+  }
+
+}

library/src/main/java/com/google/android/exoplayer/hls/parser/AdtsReader.java

@@ -30,7 +30,7 @@ import java.util.Collections;
 /**
  * Parses a continuous ADTS byte stream and extracts individual frames.
  */
-/* package */ class AdtsReader extends PesPayloadReader {
+/* package */ class AdtsReader extends ElementaryStreamReader {
 
   private static final int STATE_FINDING_SYNC = 0;
   private static final int STATE_READING_HEADER = 1;
@@ -137,6 +137,8 @@ import java.util.Collections;
       if (found) {
         hasCrc = (adtsData[i] & 0x1) == 0;
         pesBuffer.setPosition(i + 1);
+        // Reset lastByteWasFF for next time.
+        lastByteWasFF = false;
         return true;
       }
     }

library/src/main/java/com/google/android/exoplayer/hls/parser/PesPayloadReader.java → library/src/main/java/com/google/android/exoplayer/hls/parser/ElementaryStreamReader.java

@@ -19,11 +19,11 @@ import com.google.android.exoplayer.upstream.BufferPool;
 import com.google.android.exoplayer.util.ParsableByteArray;
 
 /**
- * Extracts individual samples from continuous byte stream, preserving original order.
+ * Extracts individual samples from an elementary media stream, preserving original order.
  */
-/* package */ abstract class PesPayloadReader extends SampleQueue {
+/* package */ abstract class ElementaryStreamReader extends SampleQueue {
 
-  protected PesPayloadReader(BufferPool bufferPool) {
+  protected ElementaryStreamReader(BufferPool bufferPool) {
     super(bufferPool);
   }
 

library/src/main/java/com/google/android/exoplayer/hls/parser/H264Reader.java

@@ -30,7 +30,7 @@ import java.util.List;
 /**
  * Parses a continuous H264 byte stream and extracts individual frames.
  */
-/* package */ class H264Reader extends PesPayloadReader {
+/* package */ class H264Reader extends ElementaryStreamReader {
 
   private static final int NAL_UNIT_TYPE_IDR = 5;
   private static final int NAL_UNIT_TYPE_SEI = 6;
@@ -44,6 +44,8 @@ import java.util.List;
   private final NalUnitTargetBuffer pps;
   private final NalUnitTargetBuffer sei;
 
+  private int scratchEscapeCount;
+  private int[] scratchEscapePositions;
   private boolean isKeyframe;
 
   public H264Reader(BufferPool bufferPool, SeiReader seiReader) {
@@ -53,6 +55,7 @@ import java.util.List;
     sps = new NalUnitTargetBuffer(NAL_UNIT_TYPE_SPS, 128);
     pps = new NalUnitTargetBuffer(NAL_UNIT_TYPE_PPS, 128);
     sei = new NalUnitTargetBuffer(NAL_UNIT_TYPE_SEI, 128);
+    scratchEscapePositions = new int[10];
   }
 
   @Override
@@ -133,7 +136,8 @@ import java.util.List;
     sps.endNalUnit(discardPadding);
     pps.endNalUnit(discardPadding);
     if (sei.endNalUnit(discardPadding)) {
-      seiReader.read(sei.nalData, 0, pesTimeUs);
+      int unescapedLength = unescapeStream(sei.nalData, sei.nalLength);
+      seiReader.read(sei.nalData, 0, unescapedLength, pesTimeUs);
     }
   }
 
@@ -147,8 +151,8 @@ import java.util.List;
     initializationData.add(ppsData);
 
     // Unescape and then parse the SPS unit.
-    byte[] unescapedSps = unescapeStream(spsData, 0, spsData.length);
-    ParsableBitArray bitArray = new ParsableBitArray(unescapedSps);
+    unescapeStream(sps.nalData, sps.nalLength);
+    ParsableBitArray bitArray = new ParsableBitArray(sps.nalData);
     bitArray.skipBits(32); // NAL header
     int profileIdc = bitArray.readBits(8);
     bitArray.skipBits(16); // constraint bits (6), reserved (2) and level_idc (8)
@@ -242,36 +246,45 @@ import java.util.List;
   }
 
   /**
-   * Replaces occurrences of [0, 0, 3] with [0, 0].
+   * Unescapes {@code data} up to the specified limit, replacing occurrences of [0, 0, 3] with
+   * [0, 0]. The unescaped data is returned in-place, with the return value indicating its length.
    * <p>
    * See ISO/IEC 14496-10:2005(E) page 36 for more information.
+   *
+   * @param data The data to unescape.
+   * @param limit The limit (exclusive) of the data to unescape.
+   * @return The length of the unescaped data.
    */
-  private byte[] unescapeStream(byte[] data, int offset, int limit) {
-    int position = offset;
-    List<Integer> escapePositions = new ArrayList<Integer>();
+  private int unescapeStream(byte[] data, int limit) {
+    int position = 0;
+    scratchEscapeCount = 0;
     while (position < limit) {
       position = findNextUnescapeIndex(data, position, limit);
       if (position < limit) {
-        escapePositions.add(position);
+        if (scratchEscapePositions.length <= scratchEscapeCount) {
+          // Grow scratchEscapePositions to hold a larger number of positions.
+          scratchEscapePositions = Arrays.copyOf(scratchEscapePositions,
+              scratchEscapePositions.length * 2);
+        }
+        scratchEscapePositions[scratchEscapeCount++] = position;
         position += 3;
       }
     }
 
-    int escapeCount = escapePositions.size();
-    int escapedPosition = offset; // The position being read from.
+    int unescapedLength = limit - scratchEscapeCount;
+    int escapedPosition = 0; // The position being read from.
     int unescapedPosition = 0; // The position being written to.
-    byte[] unescapedData = new byte[limit - offset - escapeCount];
-    for (int i = 0; i < escapeCount; i++) {
-      int nextEscapePosition = escapePositions.get(i);
+    for (int i = 0; i < scratchEscapeCount; i++) {
+      int nextEscapePosition = scratchEscapePositions[i];
       int copyLength = nextEscapePosition - escapedPosition;
-      System.arraycopy(data, escapedPosition, unescapedData, unescapedPosition, copyLength);
+      System.arraycopy(data, escapedPosition, data, unescapedPosition, copyLength);
       escapedPosition += copyLength + 3;
       unescapedPosition += copyLength + 2;
     }
 
-    int remainingLength = unescapedData.length - unescapedPosition;
-    System.arraycopy(data, escapedPosition, unescapedData, unescapedPosition, remainingLength);
-    return unescapedData;
+    int remainingLength = unescapedLength - unescapedPosition;
+    System.arraycopy(data, escapedPosition, data, unescapedPosition, remainingLength);
+    return unescapedLength;
   }
 
   private int findNextUnescapeIndex(byte[] bytes, int offset, int limit) {

library/src/main/java/com/google/android/exoplayer/hls/parser/HlsExtractor.java

+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.google.android.exoplayer.hls.parser;
+
+import com.google.android.exoplayer.MediaFormat;
+import com.google.android.exoplayer.SampleHolder;
+import com.google.android.exoplayer.upstream.DataSource;
+
+import java.io.IOException;
+
+/**
+ * Facilitates extraction of media samples for HLS playbacks.
+ */
+// TODO: Consider consolidating more common logic in this base class.
+public abstract class HlsExtractor {
+
+  private final boolean shouldSpliceIn;
+
+  // Accessed only by the consuming thread.
+  private boolean spliceConfigured;
+
+  public HlsExtractor(boolean shouldSpliceIn) {
+    this.shouldSpliceIn = shouldSpliceIn;
+  }
+
+  /**
+   * Attempts to configure a splice from this extractor to the next.
+   * <p>
+   * The splice is performed such that for each track the samples read from the next extractor
+   * start with a keyframe, and continue from where the samples read from this extractor finish.
+   * A successful splice may discard samples from either or both extractors.
+   * <p>
+   * Splice configuration may fail if the next extractor is not yet in a state that allows the
+   * splice to be performed. Calling this method is a noop if the splice has already been
+   * configured. Hence this method should be called repeatedly during the window within which a
+   * splice can be performed.
+   *
+   * @param nextExtractor The extractor being spliced to.
+   */
+  public final void configureSpliceTo(HlsExtractor nextExtractor) {
+    if (spliceConfigured || !nextExtractor.shouldSpliceIn || !nextExtractor.isPrepared()) {
+      // The splice is already configured, or the next extractor doesn't want to be spliced in, or
+      // the next extractor isn't ready to be spliced in.
+      return;
+    }
+    boolean spliceConfigured = true;
+    int trackCount = getTrackCount();
+    for (int i = 0; i < trackCount; i++) {
+      spliceConfigured &= getSampleQueue(i).configureSpliceTo(nextExtractor.getSampleQueue(i));
+    }
+    this.spliceConfigured = spliceConfigured;
+    return;
+  }
+
+  /**
+   * Gets the number of available tracks.
+   * <p>
+   * This method should only be called after the extractor has been prepared.
+   *
+   * @return The number of available tracks.
+   */
+  public abstract int getTrackCount();
+
+  /**
+   * Gets the format of the specified track.
+   * <p>
+   * This method must only be called after the extractor has been prepared.
+   *
+   * @param track The track index.
+   * @return The corresponding format.
+   */
+  public abstract MediaFormat getFormat(int track);
+
+  /**
+   * Whether the extractor is prepared.
+   *
+   * @return True if the extractor is prepared. False otherwise.
+   */
+  public abstract boolean isPrepared();
+
+  /**
+   * Releases the extractor, recycling any pending or incomplete samples to the sample pool.
+   * <p>
+   * This method should not be called whilst {@link #read(DataSource)} is also being invoked.
+   */
+  public abstract void release();
+
+  /**
+   * Gets the largest timestamp of any sample parsed by the extractor.
+   *
+   * @return The largest timestamp, or {@link Long#MIN_VALUE} if no samples have been parsed.
+   */
+  public abstract long getLargestSampleTimestamp();
+
+  /**
+   * Gets the next sample for the specified track.
+   *
+   * @param track The track from which to read.
+   * @param holder A {@link SampleHolder} into which the sample should be read.
+   * @return True if a sample was read. False otherwise.
+   */
+  public abstract boolean getSample(int track, SampleHolder holder);
+
+  /**
+   * Discards samples for the specified track up to the specified time.
+   *
+   * @param track The track from which samples should be discarded.
+   * @param timeUs The time up to which samples should be discarded, in microseconds.
+   */
+  public abstract void discardUntil(int track, long timeUs);
+
+  /**
+   * Whether samples are available for reading from {@link #getSample(int, SampleHolder)} for the
+   * specified track.
+   *
+   * @return True if samples are available for reading from {@link #getSample(int, SampleHolder)}
+   *     for the specified track. False otherwise.
+   */
+  public abstract boolean hasSamples(int track);
+
+  /**
+   * Reads up to a single TS packet.
+   *
+   * @param dataSource The {@link DataSource} from which to read.
+   * @throws IOException If an error occurred reading from the source.
+   * @return The number of bytes read from the source.
+   */
+  public abstract int read(DataSource dataSource) throws IOException;
+
+  /**
+   * Gets the {@link SampleQueue} for the specified track.
+   *
+   * @param track The track index.
+   * @return The corresponding sample queue.
+   */
+  protected abstract SampleQueue getSampleQueue(int track);
+
+}

library/src/main/java/com/google/android/exoplayer/hls/parser/Id3Reader.java

@@ -22,7 +22,7 @@ import com.google.android.exoplayer.util.ParsableByteArray;
 /**
  * Parses ID3 data and extracts individual text information frames.
  */
-/* package */ class Id3Reader extends PesPayloadReader {
+/* package */ class Id3Reader extends ElementaryStreamReader {
 
   public Id3Reader(BufferPool bufferPool) {
     super(bufferPool);

library/src/main/java/com/google/android/exoplayer/hls/parser/SeiReader.java

@@ -36,14 +36,33 @@ import com.google.android.exoplayer.util.ParsableByteArray;
     seiBuffer = new ParsableByteArray();
   }
 
-  public void read(byte[] data, int position, long pesTimeUs) {
-    seiBuffer.reset(data, data.length);
+  public void read(byte[] data, int position, int limit, long pesTimeUs) {
+    seiBuffer.reset(data, limit);
+    // Skip the NAL prefix and type.
     seiBuffer.setPosition(position + 4);
-    int ccDataSize = Eia608Parser.parseHeader(seiBuffer);
-    if (ccDataSize > 0) {
+
+    int b;
+    while (seiBuffer.bytesLeft() > 1 /* last byte will be rbsp_trailing_bits */) {
+      // Parse payload type.
+      int payloadType = 0;
+      do {
+        b = seiBuffer.readUnsignedByte();
+        payloadType += b;
+      } while (b == 0xFF);
+      // Parse payload size.
+      int payloadSize = 0;
+      do {
+        b = seiBuffer.readUnsignedByte();
+        payloadSize += b;
+      } while (b == 0xFF);
+      // Process the payload. We only support EIA-608 payloads currently.
+      if (Eia608Parser.inspectSeiMessage(payloadType, payloadSize, seiBuffer)) {
         startSample(pesTimeUs);
-      appendData(seiBuffer, ccDataSize);
+        appendData(seiBuffer, payloadSize);
         commitSample(true);
+      } else {
+        seiBuffer.skip(payloadSize);
+      }
     }
   }
 

library/src/main/java/com/google/android/exoplayer/hls/parser/TsExtractor.java

@@ -32,7 +32,7 @@ import java.io.IOException;
 /**
  * Facilitates the extraction of data from the MPEG-2 TS container format.
  */
-public final class TsExtractor {
+public final class TsExtractor extends HlsExtractor {
 
   private static final String TAG = "TsExtractor";
 
@@ -51,13 +51,9 @@ public final class TsExtractor {
   private final SparseArray<SampleQueue> sampleQueues; // Indexed by streamType
   private final SparseArray<TsPayloadReader> tsPayloadReaders; // Indexed by pid
   private final BufferPool bufferPool;
-  private final boolean shouldSpliceIn;
   private final long firstSampleTimestamp;
   private final ParsableBitArray tsScratch;
 
-  // Accessed only by the consuming thread.
-  private boolean spliceConfigured;
-
   // Accessed only by the loading thread.
   private int tsPacketBytesRead;
   private long timestampOffsetUs;
@@ -66,9 +62,9 @@ public final class TsExtractor {
   // Accessed by both the loading and consuming threads.
   private volatile boolean prepared;
 
-  public TsExtractor(long firstSampleTimestamp, boolean shouldSpliceIn, BufferPool bufferPool) {
+  public TsExtractor(boolean shouldSpliceIn, long firstSampleTimestamp, BufferPool bufferPool) {
+    super(shouldSpliceIn);
     this.firstSampleTimestamp = firstSampleTimestamp;
-    this.shouldSpliceIn = shouldSpliceIn;
     this.bufferPool = bufferPool;
     tsScratch = new ParsableBitArray(new byte[3]);
     tsPacketBuffer = new ParsableByteArray(TS_PACKET_SIZE);
@@ -78,86 +74,31 @@ public final class TsExtractor {
     lastPts = Long.MIN_VALUE;
   }
 
-  /**
-   * Gets the number of available tracks.
-   * <p>
-   * This method should only be called after the extractor has been prepared.
-   *
-   * @return The number of available tracks.
-   */
+  @Override
   public int getTrackCount() {
     Assertions.checkState(prepared);
     return sampleQueues.size();
   }
 
-  /**
-   * Gets the format of the specified track.
-   * <p>
-   * This method must only be called after the extractor has been prepared.
-   *
-   * @param track The track index.
-   * @return The corresponding format.
-   */
+  @Override
   public MediaFormat getFormat(int track) {
     Assertions.checkState(prepared);
     return sampleQueues.valueAt(track).getMediaFormat();
   }
 
-  /**
-   * Whether the extractor is prepared.
-   *
-   * @return True if the extractor is prepared. False otherwise.
-   */
+  @Override
   public boolean isPrepared() {
     return prepared;
   }
 
-  /**
-   * Releases the extractor, recycling any pending or incomplete samples to the sample pool.
-   * <p>
-   * This method should not be called whilst {@link #read(DataSource)} is also being invoked.
-   */
+  @Override
   public void release() {
     for (int i = 0; i < sampleQueues.size(); i++) {
       sampleQueues.valueAt(i).release();
     }
   }
 
-  /**
-   * Attempts to configure a splice from this extractor to the next.
-   * <p>
-   * The splice is performed such that for each track the samples read from the next extractor
-   * start with a keyframe, and continue from where the samples read from this extractor finish.
-   * A successful splice may discard samples from either or both extractors.
-   * <p>
-   * Splice configuration may fail if the next extractor is not yet in a state that allows the
-   * splice to be performed. Calling this method is a noop if the splice has already been
-   * configured. Hence this method should be called repeatedly during the window within which a
-   * splice can be performed.
-   *
-   * @param nextExtractor The extractor being spliced to.
-   */
-  public void configureSpliceTo(TsExtractor nextExtractor) {
-    Assertions.checkState(prepared);
-    if (spliceConfigured || !nextExtractor.shouldSpliceIn || !nextExtractor.isPrepared()) {
-      // The splice is already configured, or the next extractor doesn't want to be spliced in, or
-      // the next extractor isn't ready to be spliced in.
-      return;
-    }
-    boolean spliceConfigured = true;
-    for (int i = 0; i < sampleQueues.size(); i++) {
-      spliceConfigured &= sampleQueues.valueAt(i).configureSpliceTo(
-          nextExtractor.sampleQueues.valueAt(i));
-    }
-    this.spliceConfigured = spliceConfigured;
-    return;
-  }
-
-  /**
-   * Gets the largest timestamp of any sample parsed by the extractor.
-   *
-   * @return The largest timestamp, or {@link Long#MIN_VALUE} if no samples have been parsed.
-   */
+  @Override
   public long getLargestSampleTimestamp() {
     long largestParsedTimestampUs = Long.MIN_VALUE;
     for (int i = 0; i < sampleQueues.size(); i++) {
@@ -167,36 +108,19 @@ public final class TsExtractor {
     return largestParsedTimestampUs;
   }
 
-  /**
-   * Gets the next sample for the specified track.
-   *
-   * @param track The track from which to read.
-   * @param holder A {@link SampleHolder} into which the sample should be read.
-   * @return True if a sample was read. False otherwise.
-   */
+  @Override
   public boolean getSample(int track, SampleHolder holder) {
     Assertions.checkState(prepared);
     return sampleQueues.valueAt(track).getSample(holder);
   }
 
-  /**
-   * Discards samples for the specified track up to the specified time.
-   *
-   * @param track The track from which samples should be discarded.
-   * @param timeUs The time up to which samples should be discarded, in microseconds.
-   */
+  @Override
   public void discardUntil(int track, long timeUs) {
     Assertions.checkState(prepared);
     sampleQueues.valueAt(track).discardUntil(timeUs);
   }
 
-  /**
-   * Whether samples are available for reading from {@link #getSample(int, SampleHolder)} for the
-   * specified track.
-   *
-   * @return True if samples are available for reading from {@link #getSample(int, SampleHolder)}
-   *     for the specified track. False otherwise.
-   */
+  @Override
   public boolean hasSamples(int track) {
     Assertions.checkState(prepared);
     return !sampleQueues.valueAt(track).isEmpty();
@@ -215,13 +139,7 @@ public final class TsExtractor {
     return true;
   }
 
-  /**
-   * Reads up to a single TS packet.
-   *
-   * @param dataSource The {@link DataSource} from which to read.
-   * @throws IOException If an error occurred reading from the source.
-   * @return The number of bytes read from the source.
-   */
+  @Override
   public int read(DataSource dataSource) throws IOException {
     int bytesRead = dataSource.read(tsPacketBuffer.data, tsPacketBytesRead,
         TS_PACKET_SIZE - tsPacketBytesRead);
@@ -276,6 +194,11 @@ public final class TsExtractor {
     return bytesRead;
   }
 
+  @Override
+  protected SampleQueue getSampleQueue(int track) {
+    return sampleQueues.valueAt(track);
+  }
+
   /**
    * Adjusts a PTS value to the corresponding time in microseconds, accounting for PTS wraparound.
    *
@@ -404,7 +327,7 @@ public final class TsExtractor {
           continue;
         }
 
-        PesPayloadReader pesPayloadReader = null;
+        ElementaryStreamReader pesPayloadReader = null;
         switch (streamType) {
           case TS_STREAM_TYPE_AAC:
             pesPayloadReader = new AdtsReader(bufferPool);
@@ -444,7 +367,7 @@ public final class TsExtractor {
     private static final int MAX_HEADER_EXTENSION_SIZE = 5;
 
     private final ParsableBitArray pesScratch;
-    private final PesPayloadReader pesPayloadReader;
+    private final ElementaryStreamReader pesPayloadReader;
 
     private int state;
     private int bytesRead;
@@ -457,7 +380,7 @@ public final class TsExtractor {
 
     private long timeUs;
 
-    public PesReader(PesPayloadReader pesPayloadReader) {
+    public PesReader(ElementaryStreamReader pesPayloadReader) {
       this.pesPayloadReader = pesPayloadReader;
       pesScratch = new ParsableBitArray(new byte[HEADER_SIZE]);
       state = STATE_FINDING_HEADER;

library/src/main/java/com/google/android/exoplayer/mp4/Mp4Util.java

@@ -161,7 +161,7 @@ public final class Mp4Util {
       }
     }
 
-    int limit = endOffset - 2;
+    int limit = endOffset - 1;
     // We're looking for the NAL unit start code prefix 0x000001, followed by a byte that matches
     // the specified type. The value of i tracks the index of the third byte in the four bytes
     // being examined.

library/src/main/java/com/google/android/exoplayer/source/DefaultSampleSource.java

@@ -88,7 +88,7 @@ public final class DefaultSampleSource implements SampleSource {
     Assertions.checkState(trackStates[track] == TRACK_STATE_DISABLED);
     trackStates[track] = TRACK_STATE_ENABLED;
     sampleExtractor.selectTrack(track);
-    seekToUs(positionUs);
+    seekToUsInternal(positionUs, positionUs != 0);
   }
 
   @Override
@@ -131,17 +131,7 @@ public final class DefaultSampleSource implements SampleSource {
   @Override
   public void seekToUs(long positionUs) {
     Assertions.checkState(prepared);
-    if (seekPositionUs != positionUs) {
-      // Avoid duplicate calls to the underlying extractor's seek method in the case that there
-      // have been no interleaving calls to readSample.
-      seekPositionUs = positionUs;
-      sampleExtractor.seekTo(positionUs);
-      for (int i = 0; i < trackStates.length; ++i) {
-        if (trackStates[i] != TRACK_STATE_DISABLED) {
-          pendingDiscontinuities[i] = true;
-        }
-      }
-    }
+    seekToUsInternal(positionUs, false);
   }
 
   @Override
@@ -158,4 +148,18 @@ public final class DefaultSampleSource implements SampleSource {
     }
   }
 
+  private void seekToUsInternal(long positionUs, boolean force) {
+    // Unless forced, avoid duplicate calls to the underlying extractor's seek method in the case
+    // that there have been no interleaving calls to readSample.
+    if (force || seekPositionUs != positionUs) {
+      seekPositionUs = positionUs;
+      sampleExtractor.seekTo(positionUs);
+      for (int i = 0; i < trackStates.length; ++i) {
+        if (trackStates[i] != TRACK_STATE_DISABLED) {
+          pendingDiscontinuities[i] = true;
+        }
+      }
+    }
+  }
+
 }

library/src/main/java/com/google/android/exoplayer/text/eia608/Eia608Parser.java

@@ -97,14 +97,17 @@ public class Eia608Parser {
   }
 
   /* package */ ClosedCaptionList parse(SampleHolder sampleHolder) {
-    if (sampleHolder.size <= 0) {
+    if (sampleHolder.size < 10) {
       return null;
     }
 
     captions.clear();
     stringBuilder.setLength(0);
     seiBuffer.reset(sampleHolder.data.array());
-    seiBuffer.skipBits(3); // reserved + process_cc_data_flag + zero_bit
+
+    // country_code (8) + provider_code (16) + user_identifier (32) + user_data_type_code (8) +
+    // reserved (1) + process_cc_data_flag (1) + zero_bit (1)
+    seiBuffer.skipBits(67);
     int ccCount = seiBuffer.readBits(5);
     seiBuffer.skipBits(8);
 
@@ -177,52 +180,28 @@ public class Eia608Parser {
   }
 
   /**
-   * Parses the beginning of SEI data and returns the size of underlying contains closed captions
-   * data following the header. Returns 0 if the SEI doesn't contain any closed captions data.
+   * Inspects an sei message to determine whether it contains EIA-608.
+   * <p>
+   * The position of {@code payload} is left unchanged.
    *
-   * @param seiBuffer The buffer to read from.
-   * @return The size of closed captions data.
+   * @param payloadType The payload type of the message.
+   * @param payloadLength The length of the payload.
+   * @param payload A {@link ParsableByteArray} containing the payload.
+   * @return True if the sei message contains EIA-608. False otherwise.
    */
-  public static int parseHeader(ParsableByteArray seiBuffer) {
-    int b = 0;
-    int payloadType = 0;
-
-    do {
-      b = seiBuffer.readUnsignedByte();
-      payloadType += b;
-    } while (b == 0xFF);
-
-    if (payloadType != PAYLOAD_TYPE_CC) {
-      return 0;
-    }
-
-    int payloadSize = 0;
-    do {
-      b = seiBuffer.readUnsignedByte();
-      payloadSize += b;
-    } while (b == 0xFF);
-
-    if (payloadSize <= 0) {
-      return 0;
-    }
-
-    int countryCode = seiBuffer.readUnsignedByte();
-    if (countryCode != COUNTRY_CODE) {
-      return 0;
-    }
-    int providerCode = seiBuffer.readUnsignedShort();
-    if (providerCode != PROVIDER_CODE) {
-      return 0;
-    }
-    int userIdentifier = seiBuffer.readInt();
-    if (userIdentifier != USER_ID) {
-      return 0;
-    }
-    int userDataTypeCode = seiBuffer.readUnsignedByte();
-    if (userDataTypeCode != USER_DATA_TYPE_CODE) {
-      return 0;
-    }
-    return payloadSize;
+  public static boolean inspectSeiMessage(int payloadType, int payloadLength,
+      ParsableByteArray payload) {
+    if (payloadType != PAYLOAD_TYPE_CC || payloadLength < 8) {
+      return false;
+    }
+    int startPosition = payload.getPosition();
+    int countryCode = payload.readUnsignedByte();
+    int providerCode = payload.readUnsignedShort();
+    int userIdentifier = payload.readInt();
+    int userDataTypeCode = payload.readUnsignedByte();
+    payload.setPosition(startPosition);
+    return countryCode == COUNTRY_CODE && providerCode == PROVIDER_CODE
+        && userIdentifier == USER_ID && userDataTypeCode == USER_DATA_TYPE_CODE;
   }
 
 }