Merge pull request #444 from google/dev

dev -> dev-webm-vp9-opus

build.gradle

@@ -20,7 +20,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:1.0.0'
+        classpath 'com.android.tools.build:gradle:1.2.2'
         classpath 'com.novoda:bintray-release:0.2.7'
     }
 }

demo/build.gradle

@@ -14,12 +14,12 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 21
+    compileSdkVersion 22
-    buildToolsVersion "21.1.2"
+    buildToolsVersion "22.0.1"
 
     defaultConfig {
         minSdkVersion 16
-        targetSdkVersion 21
+        targetSdkVersion 22
     }
     buildTypes {
         release {

demo/src/main/AndroidManifest.xml

@@ -25,7 +25,7 @@
   <uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
   <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
 
-  <uses-sdk android:minSdkVersion="16" android:targetSdkVersion="21"/>
+  <uses-sdk android:minSdkVersion="16" android:targetSdkVersion="22"/>
 
   <application
       android:label="@string/application_name"

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

@@ -25,7 +25,6 @@ import java.net.CookieHandler;
 import java.net.CookieManager;
 import java.net.CookiePolicy;
 import java.net.HttpURLConnection;
-import java.net.MalformedURLException;
 import java.net.URL;
 import java.util.Map;
 
@@ -52,7 +51,7 @@ public class DemoUtil {
   }
 
   public static byte[] executePost(String url, byte[] data, Map<String, String> requestProperties)
-      throws MalformedURLException, IOException {
+      throws IOException {
     HttpURLConnection urlConnection = null;
     try {
       urlConnection = (HttpURLConnection) new URL(url).openConnection();

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

@@ -229,7 +229,8 @@ public class PlayerActivity extends Activity implements SurfaceHolder.Callback,
         return new DashRendererBuilder(this, userAgent, contentUri.toString(),
             new WidevineTestMediaDrmCallback(contentId), debugTextView, audioCapabilities);
       case DemoUtil.TYPE_HLS:
-        return new HlsRendererBuilder(this, userAgent, contentUri.toString(), debugTextView);
+        return new HlsRendererBuilder(this, userAgent, contentUri.toString(), debugTextView,
+            audioCapabilities);
       case DemoUtil.TYPE_M4A: // There are no file format differences between M4A and MP4.
       case DemoUtil.TYPE_MP4:
         return new ExtractorRendererBuilder(userAgent, contentUri, debugTextView,
@@ -239,7 +240,7 @@ public class PlayerActivity extends Activity implements SurfaceHolder.Callback,
             new Mp3Extractor());
       case DemoUtil.TYPE_TS:
         return new ExtractorRendererBuilder(userAgent, contentUri, debugTextView,
-            new TsExtractor());
+            new TsExtractor(0, audioCapabilities));
       case DemoUtil.TYPE_AAC:
         return new ExtractorRendererBuilder(userAgent, contentUri, debugTextView,
             new AdtsExtractor());

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

@@ -130,8 +130,6 @@ import java.util.Locale;
   public static final Sample[] MISC = new Sample[] {
     new Sample("Dizzy", "http://html5demos.com/assets/dizzy.mp4",
         DemoUtil.TYPE_MP4),
-    new Sample("Dizzy (https->http redirect)", "https://goo.gl/MtUDEj",
-        DemoUtil.TYPE_MP4),
     new Sample("Apple AAC 10s", "https://devimages.apple.com.edgekey.net/"
         + "streaming/examples/bipbop_4x3/gear0/fileSequence0.aac",
         DemoUtil.TYPE_AAC),

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

@@ -22,8 +22,6 @@ import android.media.MediaDrm.KeyRequest;
 import android.media.MediaDrm.ProvisionRequest;
 import android.text.TextUtils;
 
-import org.apache.http.client.ClientProtocolException;
-
 import java.io.IOException;
 import java.util.UUID;
 
@@ -43,8 +41,7 @@ public class WidevineTestMediaDrmCallback implements MediaDrmCallback {
   }
 
   @Override
-  public byte[] executeProvisionRequest(UUID uuid, ProvisionRequest request)
+  public byte[] executeProvisionRequest(UUID uuid, ProvisionRequest request) throws IOException {
-      throws ClientProtocolException, IOException {
     String url = request.getDefaultUrl() + "&signedRequest=" + new String(request.getData());
     return DemoUtil.executePost(url, null, null);
   }

demo/src/main/java/com/google/android/exoplayer/demo/player/DashRendererBuilder.java

@@ -59,7 +59,6 @@ import com.google.android.exoplayer.util.Util;
 
 import android.annotation.TargetApi;
 import android.content.Context;
-import android.media.AudioFormat;
 import android.media.MediaCodec;
 import android.media.UnsupportedSchemeException;
 import android.os.Handler;
@@ -249,7 +248,6 @@ public class DashRendererBuilder implements RendererBuilder,
     // Build the audio chunk sources.
     List<ChunkSource> audioChunkSourceList = new ArrayList<ChunkSource>();
     List<String> audioTrackNameList = new ArrayList<String>();
-    int audioEncoding = AudioFormat.ENCODING_PCM_16BIT;
     if (audioAdaptationSet != null) {
       DataSource audioDataSource = new DefaultUriDataSource(userAgent, bandwidthMeter);
       FormatEvaluator audioEvaluator = new FormatEvaluator.FixedEvaluator();
@@ -275,7 +273,6 @@ public class DashRendererBuilder implements RendererBuilder,
             continue;
           }
 
-          audioEncoding = encoding;
           for (int j = audioRepresentations.size() - 1; j >= 0; j--) {
             if (!audioRepresentations.get(j).format.codecs.equals(codec)) {
               audioTrackNameList.remove(j);
@@ -303,7 +300,7 @@ public class DashRendererBuilder implements RendererBuilder,
           AUDIO_BUFFER_SEGMENTS * BUFFER_SEGMENT_SIZE, true, mainHandler, player,
           DemoPlayer.TYPE_AUDIO);
       audioRenderer = new MediaCodecAudioTrackRenderer(audioSampleSource, drmSessionManager, true,
-          mainHandler, player, audioEncoding);
+          mainHandler, player);
     }
 
     // Build the text chunk sources.

demo/src/main/java/com/google/android/exoplayer/demo/player/DebugTrackRenderer.java

@@ -57,7 +57,7 @@ import android.widget.TextView;
   }
 
   @Override
-  protected int doPrepare() throws ExoPlaybackException {
+  protected int doPrepare(long positionUs) throws ExoPlaybackException {
     maybeFail();
     return STATE_PREPARED;
   }

demo/src/main/java/com/google/android/exoplayer/demo/player/HlsRendererBuilder.java

@@ -19,6 +19,7 @@ import com.google.android.exoplayer.MediaCodecAudioTrackRenderer;
 import com.google.android.exoplayer.MediaCodecUtil.DecoderQueryException;
 import com.google.android.exoplayer.MediaCodecVideoTrackRenderer;
 import com.google.android.exoplayer.TrackRenderer;
+import com.google.android.exoplayer.audio.AudioCapabilities;
 import com.google.android.exoplayer.chunk.VideoFormatSelectorUtil;
 import com.google.android.exoplayer.demo.player.DemoPlayer.RendererBuilder;
 import com.google.android.exoplayer.demo.player.DemoPlayer.RendererBuilderCallback;
@@ -56,15 +57,18 @@ public class HlsRendererBuilder implements RendererBuilder, ManifestCallback<Hls
   private final String userAgent;
   private final String url;
   private final TextView debugTextView;
+  private final AudioCapabilities audioCapabilities;
 
   private DemoPlayer player;
   private RendererBuilderCallback callback;
 
-  public HlsRendererBuilder(Context context, String userAgent, String url, TextView debugTextView) {
+  public HlsRendererBuilder(Context context, String userAgent, String url, TextView debugTextView,
+      AudioCapabilities audioCapabilities) {
     this.context = context;
     this.userAgent = userAgent;
     this.url = url;
     this.debugTextView = debugTextView;
+    this.audioCapabilities = audioCapabilities;
   }
 
   @Override
@@ -101,7 +105,7 @@ public class HlsRendererBuilder implements RendererBuilder, ManifestCallback<Hls
 
     DataSource dataSource = new DefaultUriDataSource(userAgent, bandwidthMeter);
     HlsChunkSource chunkSource = new HlsChunkSource(dataSource, url, manifest, bandwidthMeter,
-        variantIndices, HlsChunkSource.ADAPTIVE_MODE_SPLICE);
+        variantIndices, HlsChunkSource.ADAPTIVE_MODE_SPLICE, audioCapabilities);
     HlsSampleSource sampleSource = new HlsSampleSource(chunkSource, true, 3, REQUESTED_BUFFER_SIZE,
         REQUESTED_BUFFER_DURATION_MS, mainHandler, player, DemoPlayer.TYPE_VIDEO);
     MediaCodecVideoTrackRenderer videoRenderer = new MediaCodecVideoTrackRenderer(sampleSource,

demo/src/main/project.properties

@@ -8,6 +8,6 @@
 # project structure.
 
 # Project target.
-target=android-21
+target=android-22
 android.library=false
 android.library.reference.1=../../../library/src/main

library/build.gradle

@@ -15,8 +15,8 @@ apply plugin: 'com.android.library'
 apply plugin: 'bintray-release'
 
 android {
-    compileSdkVersion 21
+    compileSdkVersion 22
-    buildToolsVersion "21.1.2"
+    buildToolsVersion "22.0.1"
 
     defaultConfig {
         // Important: ExoPlayerLib specifies a minSdkVersion of 9 because
@@ -25,7 +25,7 @@ android {
         // functionality provided by the library requires API level 16 or
         // greater.
         minSdkVersion 9
-        targetSdkVersion 21
+        targetSdkVersion 22
     }
 
     buildTypes {

library/src/main/AndroidManifest.xml

@@ -27,6 +27,6 @@
     the library may be of use on older devices. However, please note that the core video playback
     functionality provided by the library requires API level 16 or greater.
   -->
-  <uses-sdk android:minSdkVersion="9" android:targetSdkVersion="21"/>
+  <uses-sdk android:minSdkVersion="9" android:targetSdkVersion="22"/>
 
 </manifest>

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

@@ -18,14 +18,14 @@ package com.google.android.exoplayer;
 /**
  * A {@link TrackRenderer} that does nothing.
  * <p>
- * This renderer returns {@link TrackRenderer#STATE_IGNORE} from {@link #doPrepare()} in order to
+ * This renderer returns {@link TrackRenderer#STATE_IGNORE} from {@link #doPrepare(long)} in order
- * request that it should be ignored. {@link IllegalStateException} is thrown from all methods that
+ * to request that it should be ignored. {@link IllegalStateException} is thrown from all methods
- * are documented to indicate that they should not be invoked unless the renderer is prepared.
+ * that are documented to indicate that they should not be invoked unless the renderer is prepared.
  */
 public class DummyTrackRenderer extends TrackRenderer {
 
   @Override
-  protected int doPrepare() throws ExoPlaybackException {
+  protected int doPrepare(long positionUs) throws ExoPlaybackException {
     return STATE_IGNORE;
   }
 

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

@@ -101,7 +101,7 @@ public interface ExoPlayer {
      * The default minimum duration of data that must be buffered for playback to start or resume
      * following a user action such as a seek.
      */
-    public static final int DEFAULT_MIN_BUFFER_MS = 500;
+    public static final int DEFAULT_MIN_BUFFER_MS = 2500;
 
     /**
      * The default minimum duration of data that must be buffered for playback to resume

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

@@ -264,7 +264,7 @@ import java.util.List;
     boolean prepared = true;
     for (int i = 0; i < renderers.length; i++) {
       if (renderers[i].getState() == TrackRenderer.STATE_UNPREPARED) {
-        int state = renderers[i].prepare();
+        int state = renderers[i].prepare(positionUs);
         if (state == TrackRenderer.STATE_UNPREPARED) {
           prepared = false;
         }

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

@@ -128,7 +128,7 @@ public final class FrameworkSampleSource implements SampleSource {
   }
 
   @Override
-  public boolean prepare() throws IOException {
+  public boolean prepare(long positionUs) throws IOException {
     if (!prepared) {
       extractor = new MediaExtractor();
       if (context != null) {

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

@@ -21,9 +21,7 @@ import com.google.android.exoplayer.drm.DrmSessionManager;
 import com.google.android.exoplayer.util.MimeTypes;
 
 import android.annotation.TargetApi;
-import android.media.AudioFormat;
 import android.media.MediaCodec;
-import android.media.MediaFormat;
 import android.media.audiofx.Virtualizer;
 import android.os.Handler;
 
@@ -71,7 +69,6 @@ public class MediaCodecAudioTrackRenderer extends MediaCodecTrackRenderer {
 
   private final EventListener eventListener;
   private final AudioTrack audioTrack;
-  private final int encoding;
 
   private int audioSessionId;
   private long currentPositionUs;
@@ -124,50 +121,27 @@ public class MediaCodecAudioTrackRenderer extends MediaCodecTrackRenderer {
    */
   public MediaCodecAudioTrackRenderer(SampleSource source, DrmSessionManager drmSessionManager,
       boolean playClearSamplesWithoutKeys, Handler eventHandler, EventListener eventListener) {
-    this(source, drmSessionManager, playClearSamplesWithoutKeys, eventHandler, eventListener,
-        AudioFormat.ENCODING_PCM_16BIT);
-  }
-
-  /**
-   * @param source The upstream source from which the renderer obtains samples.
-   * @param drmSessionManager For use with encrypted content. May be null if support for encrypted
-   *     content is not required.
-   * @param playClearSamplesWithoutKeys Encrypted media may contain clear (un-encrypted) regions.
-   *     For example a media file may start with a short clear region so as to allow playback to
-   *     begin in parallel with key acquisision. 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 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 encoding One of the {@code AudioFormat.ENCODING_*} constants specifying the audio
-   *     encoding.
-   */
-  public MediaCodecAudioTrackRenderer(SampleSource source, DrmSessionManager drmSessionManager,
-      boolean playClearSamplesWithoutKeys, Handler eventHandler, EventListener eventListener,
-      int encoding) {
     super(source, drmSessionManager, playClearSamplesWithoutKeys, eventHandler, eventListener);
     this.eventListener = eventListener;
     this.audioSessionId = AudioTrack.SESSION_ID_NOT_SET;
     this.audioTrack = new AudioTrack();
-    this.encoding = encoding;
   }
 
   @Override
   protected DecoderInfo getDecoderInfo(String mimeType, boolean requiresSecureDecoder)
       throws DecoderQueryException {
-    if (encoding == AudioFormat.ENCODING_AC3 || encoding == AudioFormat.ENCODING_E_AC3) {
+    if (MimeTypes.isPassthroughAudio(mimeType)) {
       return new DecoderInfo(RAW_DECODER_NAME, true);
     }
     return super.getDecoderInfo(mimeType, requiresSecureDecoder);
   }
 
   @Override
-  protected void configureCodec(MediaCodec codec, String codecName, MediaFormat format,
+  protected void configureCodec(MediaCodec codec, String codecName,
-      android.media.MediaCrypto crypto) {
+      android.media.MediaFormat format, android.media.MediaCrypto crypto) {
     if (RAW_DECODER_NAME.equals(codecName)) {
       // Override the MIME type used to configure the codec if we are using a passthrough decoder.
-      String mimeType = format.getString(MediaFormat.KEY_MIME);
+      String mimeType = format.getString(android.media.MediaFormat.KEY_MIME);
       format.setString(android.media.MediaFormat.KEY_MIME, MimeTypes.AUDIO_RAW);
       codec.configure(format, null, crypto, 0);
       format.setString(android.media.MediaFormat.KEY_MIME, mimeType);
@@ -193,8 +167,13 @@ public class MediaCodecAudioTrackRenderer extends MediaCodecTrackRenderer {
   }
 
   @Override
-  protected void onOutputFormatChanged(MediaFormat format) {
+  protected void onOutputFormatChanged(MediaFormat inputFormat,
-    audioTrack.reconfigure(format, encoding, 0);
+      android.media.MediaFormat outputFormat) {
+    if (MimeTypes.isPassthroughAudio(inputFormat.mimeType)) {
+      audioTrack.reconfigure(inputFormat.getFrameworkMediaFormatV16());
+    } else {
+      audioTrack.reconfigure(outputFormat);
+    }
   }
 
   /**

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

@@ -243,9 +243,9 @@ public abstract class MediaCodecTrackRenderer extends TrackRenderer {
   }
 
   @Override
-  protected int doPrepare() throws ExoPlaybackException {
+  protected int doPrepare(long positionUs) throws ExoPlaybackException {
     try {
-      boolean sourcePrepared = source.prepare();
+      boolean sourcePrepared = source.prepare(positionUs);
       if (!sourcePrepared) {
         return TrackRenderer.STATE_UNPREPARED;
       }
@@ -742,9 +742,11 @@ public abstract class MediaCodecTrackRenderer extends TrackRenderer {
    * <p>
    * The default implementation is a no-op.
    *
-   * @param format The new output format.
+   * @param inputFormat The format of media input to the codec.
+   * @param outputFormat The new output format.
    */
-  protected void onOutputFormatChanged(android.media.MediaFormat format) {
+  protected void onOutputFormatChanged(MediaFormat inputFormat,
+      android.media.MediaFormat outputFormat) {
     // Do nothing.
   }
 
@@ -818,7 +820,7 @@ public abstract class MediaCodecTrackRenderer extends TrackRenderer {
     }
 
     if (outputIndex == MediaCodec.INFO_OUTPUT_FORMAT_CHANGED) {
-      onOutputFormatChanged(codec.getOutputFormat());
+      onOutputFormatChanged(format, codec.getOutputFormat());
       codecCounters.outputFormatChangedCount++;
       return true;
     } else if (outputIndex == MediaCodec.INFO_OUTPUT_BUFFERS_CHANGED) {

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

@@ -381,15 +381,17 @@ public class MediaCodecVideoTrackRenderer extends MediaCodecTrackRenderer {
   }
 
   @Override
-  protected void onOutputFormatChanged(android.media.MediaFormat format) {
+  protected void onOutputFormatChanged(MediaFormat inputFormat,
-    boolean hasCrop = format.containsKey(KEY_CROP_RIGHT) && format.containsKey(KEY_CROP_LEFT)
+      android.media.MediaFormat outputFormat) {
-        && format.containsKey(KEY_CROP_BOTTOM) && format.containsKey(KEY_CROP_TOP);
+    boolean hasCrop = outputFormat.containsKey(KEY_CROP_RIGHT)
+        && outputFormat.containsKey(KEY_CROP_LEFT) && outputFormat.containsKey(KEY_CROP_BOTTOM)
+        && outputFormat.containsKey(KEY_CROP_TOP);
     currentWidth = hasCrop
-        ? format.getInteger(KEY_CROP_RIGHT) - format.getInteger(KEY_CROP_LEFT) + 1
+        ? outputFormat.getInteger(KEY_CROP_RIGHT) - outputFormat.getInteger(KEY_CROP_LEFT) + 1
-        : format.getInteger(android.media.MediaFormat.KEY_WIDTH);
+        : outputFormat.getInteger(android.media.MediaFormat.KEY_WIDTH);
     currentHeight = hasCrop
-        ? format.getInteger(KEY_CROP_BOTTOM) - format.getInteger(KEY_CROP_TOP) + 1
+        ? outputFormat.getInteger(KEY_CROP_BOTTOM) - outputFormat.getInteger(KEY_CROP_TOP) + 1
-        : format.getInteger(android.media.MediaFormat.KEY_HEIGHT);
+        : outputFormat.getInteger(android.media.MediaFormat.KEY_HEIGHT);
   }
 
   @Override

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

@@ -57,10 +57,11 @@ public interface SampleSource {
    * and formats). If insufficient data is available then the call will return {@code false} rather
    * than block. The method can be called repeatedly until the return value indicates success.
    *
+   * @param positionUs The player's current playback position.
    * @return True if the source was prepared successfully, false otherwise.
    * @throws IOException If an error occurred preparing the source.
    */
-  public boolean prepare() throws IOException;
+  public boolean prepare(long positionUs) throws IOException;
 
   /**
    * Returns the number of tracks exposed by the source.

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

@@ -108,11 +108,12 @@ public abstract class TrackRenderer implements ExoPlayerComponent {
    * Prepares the renderer. This method is non-blocking, and hence it may be necessary to call it
    * more than once in order to transition the renderer into the prepared state.
    *
+   * @param positionUs The player's current playback position.
    * @return The current state (one of the STATE_* constants), for convenience.
    */
-  /* package */ final int prepare() throws ExoPlaybackException {
+  /* package */ final int prepare(long positionUs) throws ExoPlaybackException {
     Assertions.checkState(state == TrackRenderer.STATE_UNPREPARED);
-    state = doPrepare();
+    state = doPrepare(positionUs);
     Assertions.checkState(state == TrackRenderer.STATE_UNPREPARED ||
         state == TrackRenderer.STATE_PREPARED ||
         state == TrackRenderer.STATE_IGNORE);
@@ -127,11 +128,12 @@ public abstract class TrackRenderer implements ExoPlayerComponent {
    * This method should return quickly, and should not block if the renderer is currently unable to
    * make any useful progress.
    *
+   * @param positionUs The player's current playback position.
    * @return The new state of the renderer. One of {@link #STATE_UNPREPARED},
    *     {@link #STATE_PREPARED} and {@link #STATE_IGNORE}.
    * @throws ExoPlaybackException If an error occurs.
    */
-  protected abstract int doPrepare() throws ExoPlaybackException;
+  protected abstract int doPrepare(long positionUs) throws ExoPlaybackException;
 
   /**
    * Enable the renderer.

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

@@ -18,6 +18,7 @@ package com.google.android.exoplayer.audio;
 import com.google.android.exoplayer.C;
 import com.google.android.exoplayer.util.Ac3Util;
 import com.google.android.exoplayer.util.Assertions;
+import com.google.android.exoplayer.util.MimeTypes;
 import com.google.android.exoplayer.util.Util;
 
 import android.annotation.TargetApi;
@@ -315,24 +316,21 @@ public final class AudioTrack {
   }
 
   /**
-   * Reconfigures the audio track to play back media in {@code format}. The encoding is assumed to
+   * Reconfigures the audio track to play back media in {@code format}, inferring a buffer size from
-   * be {@link AudioFormat#ENCODING_PCM_16BIT}.
+   * the format.
    */
   public void reconfigure(MediaFormat format) {
-    reconfigure(format, AudioFormat.ENCODING_PCM_16BIT, 0);
+    reconfigure(format, 0);
   }
 
   /**
-   * Reconfigures the audio track to play back media in {@code format}. Buffers passed to
+   * Reconfigures the audio track to play back media in {@code format}.
-   * {@link #handleBuffer} must use the specified {@code encoding}, which should be a constant from
-   * {@link AudioFormat}.
    *
    * @param format Specifies the channel count and sample rate to play back.
-   * @param encoding The format in which audio is represented.
    * @param specifiedBufferSize A specific size for the playback buffer in bytes, or 0 to use a
    *     size inferred from the format.
    */
-  public void reconfigure(MediaFormat format, int encoding, int specifiedBufferSize) {
+  public void reconfigure(MediaFormat format, int specifiedBufferSize) {
     int channelCount = format.getInteger(MediaFormat.KEY_CHANNEL_COUNT);
     int channelConfig;
     switch (channelCount) {
@@ -353,8 +351,10 @@ public final class AudioTrack {
     }
 
     int sampleRate = format.getInteger(MediaFormat.KEY_SAMPLE_RATE);
+    String mimeType = format.getString(MediaFormat.KEY_MIME);
 
     // TODO: Does channelConfig determine channelCount?
+    int encoding = MimeTypes.getEncodingForMimeType(mimeType);
     boolean isAc3 = encoding == C.ENCODING_AC3 || encoding == C.ENCODING_E_AC3;
     if (isInitialized() && this.sampleRate == sampleRate && this.channelConfig == channelConfig
         && !this.isAc3 && !isAc3) {
@@ -423,12 +423,23 @@ public final class AudioTrack {
       return RESULT_BUFFER_CONSUMED;
     }
 
-    // As a workaround for an issue where an an AC-3 audio track continues to play data written
+    // Workarounds for issues with AC-3 passthrough AudioTracks on API versions 21/22:
-    // while it is paused, stop writing so its buffer empties. See [Internal: b/18899620].
+    if (Util.SDK_INT <= 22 && isAc3) {
-    if (isAc3 && audioTrack.getPlayState() == android.media.AudioTrack.PLAYSTATE_PAUSED) {
+      // An AC-3 audio track continues to play data written while it is paused. Stop writing so its
+      // buffer empties. See [Internal: b/18899620].
+      if (audioTrack.getPlayState() == android.media.AudioTrack.PLAYSTATE_PAUSED) {
         return 0;
       }
 
+      // A new AC-3 audio track's playback position continues to increase from the old track's
+      // position for a short time after is has been released. Avoid writing data until the playback
+      // head position actually returns to zero.
+      if (audioTrack.getPlayState() == android.media.AudioTrack.PLAYSTATE_STOPPED
+          && audioTrackUtil.getPlaybackHeadPosition() != 0) {
+        return 0;
+      }
+    }
+
     int result = 0;
     if (temporaryBufferSize == 0) {
       if (isAc3 && ac3Bitrate == UNKNOWN_AC3_BITRATE) {
@@ -637,7 +648,8 @@ public final class AudioTrack {
     }
 
     if (systemClockUs - lastTimestampSampleTimeUs >= MIN_TIMESTAMP_SAMPLE_INTERVAL_US) {
-      audioTimestampSet = audioTrackUtil.updateTimestamp();
+      // Don't use AudioTrack.getTimestamp() on AC-3 tracks, as it gives an incorrect timestamp.
+      audioTimestampSet = !isAc3 && audioTrackUtil.updateTimestamp();
       if (audioTimestampSet) {
         // Perform sanity checks on the timestamp.
         long audioTimestampUs = audioTrackUtil.getTimestampNanoTime() / 1000;
@@ -739,7 +751,7 @@ public final class AudioTrack {
   private static class AudioTrackUtil {
 
     protected android.media.AudioTrack audioTrack;
-    private boolean enablePassthroughWorkaround;
+    private boolean isPassthrough;
     private int sampleRate;
     private long lastRawPlaybackHeadPosition;
     private long rawPlaybackHeadWrapCount;
@@ -749,14 +761,11 @@ public final class AudioTrack {
      * Reconfigures the audio track utility helper to use the specified {@code audioTrack}.
      *
      * @param audioTrack The audio track to wrap.
-     * @param enablePassthroughWorkaround Whether to work around an issue where the playback head
+     * @param isPassthrough Whether the audio track is used for passthrough (e.g. AC-3) playback.
-     *     position jumps back to zero on a paused passthrough/direct audio track. See
-     *     [Internal: b/19187573].
      */
-    public void reconfigure(android.media.AudioTrack audioTrack,
+    public void reconfigure(android.media.AudioTrack audioTrack, boolean isPassthrough) {
-        boolean enablePassthroughWorkaround) {
       this.audioTrack = audioTrack;
-      this.enablePassthroughWorkaround = enablePassthroughWorkaround;
+      this.isPassthrough = isPassthrough;
       lastRawPlaybackHeadPosition = 0;
       rawPlaybackHeadWrapCount = 0;
       passthroughWorkaroundPauseOffset = 0;
@@ -767,14 +776,14 @@ public final class AudioTrack {
 
     /**
      * Returns whether the audio track should behave as though it has pending data. This is to work
-     * around an issue where AC-3 audio tracks can't be paused, so we empty their buffers when
+     * around an issue on platform API versions 21/22 where AC-3 audio tracks can't be paused, so we
-     * paused. In this case, they should still behave as if they have pending data, otherwise
+     * empty their buffers when paused. In this case, they should still behave as if they have
-     * writing will never resume.
+     * pending data, otherwise writing will never resume.
      *
      * @see #handleBuffer
      */
     public boolean overrideHasPendingData() {
-      return enablePassthroughWorkaround
+      return Util.SDK_INT <= 22 && isPassthrough
           && audioTrack.getPlayState() == android.media.AudioTrack.PLAYSTATE_PAUSED
           && audioTrack.getPlaybackHeadPosition() == 0;
     }
@@ -790,8 +799,16 @@ public final class AudioTrack {
      */
     public long getPlaybackHeadPosition() {
       long rawPlaybackHeadPosition = 0xFFFFFFFFL & audioTrack.getPlaybackHeadPosition();
-      if (enablePassthroughWorkaround) {
+      if (Util.SDK_INT <= 22 && isPassthrough) {
-        if (audioTrack.getPlayState() == android.media.AudioTrack.PLAYSTATE_PAUSED
+        // Work around issues with passthrough/direct AudioTracks on platform API versions 21/22:
+        // - After resetting, the new AudioTrack's playback position continues to increase for a
+        //   short time from the old AudioTrack's position, while in the PLAYSTATE_STOPPED state.
+        // - The playback head position jumps back to zero on paused passthrough/direct audio
+        //   tracks. See [Internal: b/19187573].
+        if (audioTrack.getPlayState() == android.media.AudioTrack.PLAYSTATE_STOPPED) {
+          // Prevent detecting a wrapped position.
+          lastRawPlaybackHeadPosition = rawPlaybackHeadPosition;
+        } else if (audioTrack.getPlayState() == android.media.AudioTrack.PLAYSTATE_PAUSED
             && rawPlaybackHeadPosition == 0) {
           passthroughWorkaroundPauseOffset = lastRawPlaybackHeadPosition;
         }
@@ -868,9 +885,8 @@ public final class AudioTrack {
     }
 
     @Override
-    public void reconfigure(android.media.AudioTrack audioTrack,
+    public void reconfigure(android.media.AudioTrack audioTrack, boolean isPassthrough) {
-        boolean enablePassthroughWorkaround) {
+      super.reconfigure(audioTrack, isPassthrough);
-      super.reconfigure(audioTrack, enablePassthroughWorkaround);
       rawTimestampFramePositionWrapCount = 0;
       lastRawTimestampFramePosition = 0;
       lastTimestampFramePosition = 0;

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

@@ -87,7 +87,7 @@ public class ChunkSampleSource implements SampleSource, Loader.Callback {
   private long currentLoadStartTimeMs;
 
   private MediaFormat downstreamMediaFormat;
-  private volatile Format downstreamFormat;
+  private Format downstreamFormat;
 
   public ChunkSampleSource(ChunkSource chunkSource, LoadControl loadControl,
       int bufferSizeContribution, boolean frameAccurateSeeking) {
@@ -120,18 +120,8 @@ public class ChunkSampleSource implements SampleSource, Loader.Callback {
     pendingResetPositionUs = NO_RESET_PENDING;
   }
 
-  /**
-   * Exposes the current downstream format for debugging purposes. Can be called from any thread.
-   *
-   * @return The current downstream format.
-   */
-  @Deprecated
-  public Format getFormat() {
-    return downstreamFormat;
-  }
-
   @Override
-  public boolean prepare() {
+  public boolean prepare(long positionUs) {
     Assertions.checkState(state == STATE_UNPREPARED);
     loader = new Loader("Loader:" + chunkSource.getTrackInfo().mimeType);
     state = STATE_PREPARED;

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

@@ -84,7 +84,7 @@ public interface FormatEvaluator {
   /**
    * Always selects the first format.
    */
-  public static class FixedEvaluator implements FormatEvaluator {
+  public static final class FixedEvaluator implements FormatEvaluator {
 
     @Override
     public void enable() {
@@ -107,7 +107,7 @@ public interface FormatEvaluator {
   /**
    * Selects randomly between the available formats.
    */
-  public static class RandomEvaluator implements FormatEvaluator {
+  public static final class RandomEvaluator implements FormatEvaluator {
 
     private final Random random;
 
@@ -145,7 +145,7 @@ public interface FormatEvaluator {
    * reference implementation only. It is recommended that application developers implement their
    * own adaptive evaluator to more precisely suit their use case.
    */
-  public static class AdaptiveEvaluator implements FormatEvaluator {
+  public static final class AdaptiveEvaluator implements FormatEvaluator {
 
     public static final int DEFAULT_MAX_INITIAL_BITRATE = 800000;
 
@@ -259,8 +259,9 @@ public interface FormatEvaluator {
     /**
      * Compute the ideal format ignoring buffer health.
      */
-    protected Format determineIdealFormat(Format[] formats, long bitrateEstimate) {
+    private Format determineIdealFormat(Format[] formats, long bitrateEstimate) {
-      long effectiveBitrate = computeEffectiveBitrateEstimate(bitrateEstimate);
+      long effectiveBitrate = bitrateEstimate == BandwidthMeter.NO_ESTIMATE
+          ? maxInitialBitrate : (long) (bitrateEstimate * bandwidthFraction);
       for (int i = 0; i < formats.length; i++) {
         Format format = formats[i];
         if (format.bitrate <= effectiveBitrate) {
@@ -271,14 +272,6 @@ public interface FormatEvaluator {
       return formats[formats.length - 1];
     }
 
-    /**
-     * Apply overhead factor, or default value in absence of estimate.
-     */
-    protected long computeEffectiveBitrateEstimate(long bitrateEstimate) {
-      return bitrateEstimate == BandwidthMeter.NO_ESTIMATE
-          ? maxInitialBitrate : (long) (bitrateEstimate * bandwidthFraction);
-    }
-
   }
 
 }

library/src/main/java/com/google/android/exoplayer/dash/DashChunkSource.java

@@ -419,7 +419,9 @@ public class DashChunkSource implements ChunkSource {
             (ChunkIndex) initializationChunk.getSeekMap(),
             initializationChunk.dataSpec.uri.toString());
       }
-      if (initializationChunk.hasDrmInitData()) {
+      // The null check avoids overwriting drmInitData obtained from the manifest with drmInitData
+      // obtained from the stream, as per DASH IF Interoperability Recommendations V3.0, 7.5.3.
+      if (drmInitData == null && initializationChunk.hasDrmInitData()) {
         drmInitData = initializationChunk.getDrmInitData();
       }
     }

library/src/main/java/com/google/android/exoplayer/dash/mpd/MediaPresentationDescriptionParser.java

@@ -24,10 +24,12 @@ import com.google.android.exoplayer.dash.mpd.SegmentBase.SingleSegmentBase;
 import com.google.android.exoplayer.upstream.UriLoadable;
 import com.google.android.exoplayer.util.Assertions;
 import com.google.android.exoplayer.util.MimeTypes;
+import com.google.android.exoplayer.util.ParsableByteArray;
 import com.google.android.exoplayer.util.UriUtil;
 import com.google.android.exoplayer.util.Util;
 
 import android.text.TextUtils;
+import android.util.Base64;
 
 import org.xml.sax.helpers.DefaultHandler;
 import org.xmlpull.v1.XmlPullParser;
@@ -41,6 +43,7 @@ import java.util.ArrayList;
 import java.util.Collections;
 import java.util.Comparator;
 import java.util.List;
+import java.util.UUID;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
@@ -270,11 +273,27 @@ public class MediaPresentationDescriptionParser extends DefaultHandler
   protected ContentProtection parseContentProtection(XmlPullParser xpp)
       throws XmlPullParserException, IOException {
     String schemeIdUri = xpp.getAttributeValue(null, "schemeIdUri");
-    return buildContentProtection(schemeIdUri);
+    UUID uuid = null;
+    byte[] data = null;
+    do {
+      xpp.next();
+      // The cenc:pssh element is defined in 23001-7:2015
+      if (isStartTag(xpp, "cenc:pssh") && xpp.next() == XmlPullParser.TEXT) {
+        byte[] decodedData = Base64.decode(xpp.getText(), Base64.DEFAULT);
+        ParsableByteArray psshAtom = new ParsableByteArray(decodedData);
+        psshAtom.skipBytes(12);
+        uuid = new UUID(psshAtom.readLong(), psshAtom.readLong());
+        int dataSize = psshAtom.readInt();
+        data = new byte[dataSize];
+        psshAtom.readBytes(data, 0, dataSize);
+      }
+    } while (!isEndTag(xpp, "ContentProtection"));
+
+    return buildContentProtection(schemeIdUri, uuid, data);
   }
 
-  protected ContentProtection buildContentProtection(String schemeIdUri) {
+  protected ContentProtection buildContentProtection(String schemeIdUri, UUID uuid, byte[] data) {
-    return new ContentProtection(schemeIdUri, null, null);
+    return new ContentProtection(schemeIdUri, uuid, data);
   }
 
   /**

library/src/main/java/com/google/android/exoplayer/extractor/ExtractorSampleSource.java

@@ -72,6 +72,7 @@ public class ExtractorSampleSource implements SampleSource, ExtractorOutput, Loa
   private boolean prepared;
   private int enabledTrackCount;
   private TrackInfo[] trackInfos;
+  private long maxTrackDurationUs;
   private boolean[] pendingMediaFormat;
   private boolean[] pendingDiscontinuities;
   private boolean[] trackEnabledStates;
@@ -137,7 +138,7 @@ public class ExtractorSampleSource implements SampleSource, ExtractorOutput, Loa
   }
 
   @Override
-  public boolean prepare() throws IOException {
+  public boolean prepare(long positionUs) throws IOException {
     if (prepared) {
       return true;
     }
@@ -156,9 +157,13 @@ public class ExtractorSampleSource implements SampleSource, ExtractorOutput, Loa
       pendingDiscontinuities = new boolean[trackCount];
       pendingMediaFormat = new boolean[trackCount];
       trackInfos = new TrackInfo[trackCount];
+      maxTrackDurationUs = C.UNKNOWN_TIME_US;
       for (int i = 0; i < trackCount; i++) {
         MediaFormat format = sampleQueues.valueAt(i).getFormat();
         trackInfos[i] = new TrackInfo(format.mimeType, format.durationUs);
+        if (format.durationUs != C.UNKNOWN_TIME_US && format.durationUs > maxTrackDurationUs) {
+          maxTrackDurationUs = format.durationUs;
+        }
       }
       prepared = true;
       return true;
@@ -448,6 +453,11 @@ public class ExtractorSampleSource implements SampleSource, ExtractorOutput, Loa
       loadable = createLoadableFromStart();
     } else {
       Assertions.checkState(isPendingReset());
+      if (maxTrackDurationUs != C.UNKNOWN_TIME_US && pendingResetPositionUs >= maxTrackDurationUs) {
+        loadingFinished = true;
+        pendingResetPositionUs = NO_RESET_PENDING;
+        return;
+      }
       loadable = createLoadableFromPositionUs(pendingResetPositionUs);
       pendingResetPositionUs = NO_RESET_PENDING;
     }

library/src/main/java/com/google/android/exoplayer/extractor/mp3/XingSeeker.java

@@ -137,7 +137,7 @@ import com.google.android.exoplayer.util.Util;
     }
 
     long position = (long) ((1f / 256) * fx * sizeBytes) + firstFramePosition;
-    return inputLength != C.LENGTH_UNBOUNDED ? Math.min(position, inputLength) : position;
+    return inputLength != C.LENGTH_UNBOUNDED ? Math.min(position, inputLength - 1) : position;
   }
 
   @Override

library/src/main/java/com/google/android/exoplayer/extractor/mp4/AtomParsers.java

@@ -534,8 +534,18 @@ import java.util.List;
       childPosition += childAtomSize;
     }
 
-    out.mediaFormat = MediaFormat.createAudioFormat(
+    // Set the MIME type for ac-3/ec-3 atoms even if the dac3/dec3 child atom is missing.
-        MimeTypes.AUDIO_AAC, sampleSize, durationUs, channelCount, sampleRate,
+    String mimeType;
+    if (atomType == Atom.TYPE_ac_3) {
+      mimeType = MimeTypes.AUDIO_AC3;
+    } else if (atomType == Atom.TYPE_ec_3) {
+      mimeType = MimeTypes.AUDIO_EC3;
+    } else {
+      mimeType = MimeTypes.AUDIO_AAC;
+    }
+
+    out.mediaFormat = MediaFormat.createAudioFormat(mimeType, sampleSize, durationUs, channelCount,
+        sampleRate,
         initializationData == null ? null : Collections.singletonList(initializationData));
   }
 

library/src/main/java/com/google/android/exoplayer/extractor/ts/TsExtractor.java

@@ -16,6 +16,7 @@
 package com.google.android.exoplayer.extractor.ts;
 
 import com.google.android.exoplayer.C;
+import com.google.android.exoplayer.audio.AudioCapabilities;
 import com.google.android.exoplayer.extractor.Extractor;
 import com.google.android.exoplayer.extractor.ExtractorInput;
 import com.google.android.exoplayer.extractor.ExtractorOutput;
@@ -43,7 +44,7 @@ public final class TsExtractor implements Extractor, SeekMap {
 
   private static final int TS_STREAM_TYPE_AAC = 0x0F;
   private static final int TS_STREAM_TYPE_ATSC_AC3 = 0x81;
-  private static final int TS_STREAM_TYPE_DVB_AC3 = 0x06;
+  private static final int TS_STREAM_TYPE_ATSC_E_AC3 = 0x87;
   private static final int TS_STREAM_TYPE_H264 = 0x1B;
   private static final int TS_STREAM_TYPE_ID3 = 0x15;
   private static final int TS_STREAM_TYPE_EIA608 = 0x100; // 0xFF + 1
@@ -52,6 +53,7 @@ public final class TsExtractor implements Extractor, SeekMap {
 
   private final ParsableByteArray tsPacketBuffer;
   private final SparseBooleanArray streamTypes;
+  private final SparseBooleanArray allowedPassthroughStreamTypes;
   private final SparseArray<TsPayloadReader> tsPayloadReaders; // Indexed by pid
   private final long firstSampleTimestampUs;
   private final ParsableBitArray tsScratch;
@@ -62,14 +64,15 @@ public final class TsExtractor implements Extractor, SeekMap {
   private long lastPts;
 
   public TsExtractor() {
-    this(0);
+    this(0, null);
   }
 
-  public TsExtractor(long firstSampleTimestampUs) {
+  public TsExtractor(long firstSampleTimestampUs, AudioCapabilities audioCapabilities) {
     this.firstSampleTimestampUs = firstSampleTimestampUs;
     tsScratch = new ParsableBitArray(new byte[3]);
     tsPacketBuffer = new ParsableByteArray(TS_PACKET_SIZE);
     streamTypes = new SparseBooleanArray();
+    allowedPassthroughStreamTypes = getPassthroughStreamTypes(audioCapabilities);
     tsPayloadReaders = new SparseArray<TsPayloadReader>();
     tsPayloadReaders.put(TS_PAT_PID, new PatReader());
     lastPts = Long.MIN_VALUE;
@@ -174,6 +177,24 @@ public final class TsExtractor implements Extractor, SeekMap {
     return timeUs + timestampOffsetUs;
   }
 
+  /**
+   * Returns a sparse boolean array of stream types that can be played back based on
+   * {@code audioCapabilities}.
+   */
+  private static SparseBooleanArray getPassthroughStreamTypes(AudioCapabilities audioCapabilities) {
+    SparseBooleanArray streamTypes = new SparseBooleanArray();
+    if (audioCapabilities != null) {
+      if (audioCapabilities.supportsEncoding(C.ENCODING_AC3)) {
+        streamTypes.put(TS_STREAM_TYPE_ATSC_AC3, true);
+      }
+      if (audioCapabilities.supportsEncoding(C.ENCODING_E_AC3)) {
+        // TODO: Uncomment when Ac3Reader supports enhanced AC-3.
+        // streamTypes.put(TS_STREAM_TYPE_ATSC_E_AC3, true);
+      }
+    }
+    return streamTypes;
+  }
+
   /**
    * Parses TS packet payload data.
    */
@@ -308,13 +329,17 @@ public final class TsExtractor implements Extractor, SeekMap {
           continue;
         }
 
+        // TODO: Detect and read DVB AC-3 streams with Ac3Reader.
         ElementaryStreamReader pesPayloadReader = null;
         switch (streamType) {
           case TS_STREAM_TYPE_AAC:
             pesPayloadReader = new AdtsReader(output.track(TS_STREAM_TYPE_AAC));
             break;
+          case TS_STREAM_TYPE_ATSC_E_AC3:
           case TS_STREAM_TYPE_ATSC_AC3:
-          case TS_STREAM_TYPE_DVB_AC3:
+            if (!allowedPassthroughStreamTypes.get(streamType)) {
+              continue;
+            }
             pesPayloadReader = new Ac3Reader(output.track(streamType));
             break;
           case TS_STREAM_TYPE_H264:

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

@@ -17,6 +17,7 @@ package com.google.android.exoplayer.hls;
 
 import com.google.android.exoplayer.C;
 import com.google.android.exoplayer.MediaFormat;
+import com.google.android.exoplayer.audio.AudioCapabilities;
 import com.google.android.exoplayer.chunk.BaseChunkSampleSourceEventListener;
 import com.google.android.exoplayer.chunk.Chunk;
 import com.google.android.exoplayer.chunk.DataChunk;
@@ -125,6 +126,7 @@ public class HlsChunkSource {
   private final int maxHeight;
   private final long minBufferDurationToSwitchUpUs;
   private final long maxBufferDurationToSwitchDownUs;
+  private final AudioCapabilities audioCapabilities;
 
   /* package */ byte[] scratchSpace;
   /* package */ final HlsMediaPlaylist[] mediaPlaylists;
@@ -140,9 +142,11 @@ public class HlsChunkSource {
   private byte[] encryptionIv;
 
   public HlsChunkSource(DataSource dataSource, String playlistUrl, HlsPlaylist playlist,
-      BandwidthMeter bandwidthMeter, int[] variantIndices, int adaptiveMode) {
+      BandwidthMeter bandwidthMeter, int[] variantIndices, int adaptiveMode,
+      AudioCapabilities audioCapabilities) {
     this(dataSource, playlistUrl, playlist, bandwidthMeter, variantIndices, adaptiveMode,
-        DEFAULT_MIN_BUFFER_TO_SWITCH_UP_MS, DEFAULT_MAX_BUFFER_TO_SWITCH_DOWN_MS);
+        DEFAULT_MIN_BUFFER_TO_SWITCH_UP_MS, DEFAULT_MAX_BUFFER_TO_SWITCH_DOWN_MS,
+        audioCapabilities);
   }
 
   /**
@@ -160,13 +164,17 @@ public class HlsChunkSource {
    *     for a switch to a higher quality variant to be considered.
    * @param maxBufferDurationToSwitchDownMs The maximum duration of media that needs to be buffered
    *     for a switch to a lower quality variant to be considered.
+   * @param audioCapabilities The audio capabilities for playback on this device, or {@code null} if
+   *     the default capabilities should be assumed.
    */
   public HlsChunkSource(DataSource dataSource, String playlistUrl, HlsPlaylist playlist,
       BandwidthMeter bandwidthMeter, int[] variantIndices, int adaptiveMode,
-      long minBufferDurationToSwitchUpMs, long maxBufferDurationToSwitchDownMs) {
+      long minBufferDurationToSwitchUpMs, long maxBufferDurationToSwitchDownMs,
+      AudioCapabilities audioCapabilities) {
     this.dataSource = dataSource;
     this.bandwidthMeter = bandwidthMeter;
     this.adaptiveMode = adaptiveMode;
+    this.audioCapabilities = audioCapabilities;
     minBufferDurationToSwitchUpUs = minBufferDurationToSwitchUpMs * 1000;
     maxBufferDurationToSwitchDownUs = maxBufferDurationToSwitchDownMs * 1000;
     baseUri = playlist.baseUri;
@@ -235,16 +243,14 @@ public class HlsChunkSource {
   public Chunk getChunkOperation(TsChunk previousTsChunk, long seekPositionUs,
       long playbackPositionUs) {
     int nextFormatIndex;
-    boolean switchingVariant;
     boolean switchingVariantSpliced;
     if (adaptiveMode == ADAPTIVE_MODE_NONE) {
       nextFormatIndex = formatIndex;
-      switchingVariant = false;
       switchingVariantSpliced = false;
     } else {
       nextFormatIndex = getNextFormatIndex(previousTsChunk, playbackPositionUs);
-      switchingVariant = nextFormatIndex != formatIndex;
+      switchingVariantSpliced = nextFormatIndex != formatIndex
-      switchingVariantSpliced = switchingVariant && adaptiveMode == ADAPTIVE_MODE_SPLICE;
+          && adaptiveMode == ADAPTIVE_MODE_SPLICE;
     }
 
     int variantIndex = getVariantIndex(enabledFormats[nextFormatIndex]);
@@ -331,10 +337,11 @@ public class HlsChunkSource {
 
     // Configure the extractor that will read the chunk.
     HlsExtractorWrapper extractorWrapper;
-    if (previousTsChunk == null || segment.discontinuity || switchingVariant || liveDiscontinuity) {
+    if (previousTsChunk == null || segment.discontinuity || !format.equals(previousTsChunk.format)
+        || liveDiscontinuity) {
       Extractor extractor = chunkUri.getLastPathSegment().endsWith(AAC_FILE_EXTENSION)
           ? new AdtsExtractor(startTimeUs)
-          : new TsExtractor(startTimeUs);
+          : new TsExtractor(startTimeUs, audioCapabilities);
       extractorWrapper = new HlsExtractorWrapper(trigger, format, startTimeUs, extractor,
           switchingVariantSpliced);
     } else {

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

@@ -125,15 +125,12 @@ public class HlsSampleSource implements SampleSource, Loader.Callback {
   }
 
   @Override
-  public boolean prepare() throws IOException {
+  public boolean prepare(long positionUs) throws IOException {
     if (prepared) {
       return true;
     }
-    if (loader == null) {
-      loader = new Loader("Loader:HLS");
-    }
-    continueBufferingInternal();
     if (!extractors.isEmpty()) {
+      // We're not prepared, but we might have loaded what we need.
       HlsExtractorWrapper extractor = extractors.getFirst();
       if (extractor.isPrepared()) {
         trackCount = extractor.getTrackCount();
@@ -146,12 +143,23 @@ public class HlsSampleSource implements SampleSource, Loader.Callback {
           trackInfos[i] = new TrackInfo(format.mimeType, chunkSource.getDurationUs());
         }
         prepared = true;
+        return true;
       }
     }
-    if (!prepared) {
+    // We're not prepared and we haven't loaded what we need.
+    if (loader == null) {
+      loader = new Loader("Loader:HLS");
+    }
+    if (!loader.isLoading()) {
+      // We're going to have to start loading a chunk to get what we need for preparation. We should
+      // attempt to load the chunk at positionUs, so that we'll already be loading the correct chunk
+      // in the common case where the renderer is subsequently enabled at this position.
+      pendingResetPositionUs = positionUs;
+      downstreamPositionUs = positionUs;
+    }
+    maybeStartLoading();
     maybeThrowLoadableException();
-    }
+    return false;
-    return prepared;
   }
 
   @Override
@@ -345,7 +353,12 @@ public class HlsSampleSource implements SampleSource, Loader.Callback {
     if (!currentLoadableExceptionFatal) {
       clearCurrentLoadable();
     }
+    if (enabledTrackCount > 0) {
       maybeStartLoading();
+    } else {
+      clearState();
+      allocator.trim(0);
+    }
   }
 
   @Override

library/src/main/java/com/google/android/exoplayer/metadata/MetadataTrackRenderer.java

@@ -90,9 +90,9 @@ public class MetadataTrackRenderer<T> extends TrackRenderer implements Callback
   }
 
   @Override
-  protected int doPrepare() throws ExoPlaybackException {
+  protected int doPrepare(long positionUs) throws ExoPlaybackException {
     try {
-      boolean sourcePrepared = source.prepare();
+      boolean sourcePrepared = source.prepare(positionUs);
       if (!sourcePrepared) {
         return TrackRenderer.STATE_UNPREPARED;
       }

library/src/main/java/com/google/android/exoplayer/text/TextTrackRenderer.java

@@ -80,9 +80,9 @@ public class TextTrackRenderer extends TrackRenderer implements Callback {
   }
 
   @Override
-  protected int doPrepare() throws ExoPlaybackException {
+  protected int doPrepare(long positionUs) throws ExoPlaybackException {
     try {
-      boolean sourcePrepared = source.prepare();
+      boolean sourcePrepared = source.prepare(positionUs);
       if (!sourcePrepared) {
         return TrackRenderer.STATE_UNPREPARED;
       }

library/src/main/java/com/google/android/exoplayer/text/eia608/Eia608TrackRenderer.java

@@ -90,9 +90,9 @@ public class Eia608TrackRenderer extends TrackRenderer implements Callback {
   }
 
   @Override
-  protected int doPrepare() throws ExoPlaybackException {
+  protected int doPrepare(long positionUs) throws ExoPlaybackException {
     try {
-      boolean sourcePrepared = source.prepare();
+      boolean sourcePrepared = source.prepare(positionUs);
       if (!sourcePrepared) {
         return TrackRenderer.STATE_UNPREPARED;
       }

library/src/main/java/com/google/android/exoplayer/upstream/BandwidthMeter.java

@@ -18,7 +18,24 @@ package com.google.android.exoplayer.upstream;
 /**
  * Provides estimates of the currently available bandwidth.
  */
-public interface BandwidthMeter {
+public interface BandwidthMeter extends TransferListener {
+
+  /**
+   * Interface definition for a callback to be notified of {@link BandwidthMeter} events.
+   */
+  public interface EventListener {
+
+    /**
+     * Invoked periodically to indicate that bytes have been transferred.
+     *
+     * @param elapsedMs The time taken to transfer the bytes, in milliseconds.
+     * @param bytes The number of bytes transferred.
+     * @param bitrate The estimated bitrate in bits/sec, or {@link #NO_ESTIMATE} if no estimate
+     *     is available. Note that this estimate is typically derived from more information than
+     *     {@code bytes} and {@code elapsedMs}.
+     */
+    void onBandwidthSample(int elapsedMs, long bytes, long bitrate);
+  }
 
   /**
    * Indicates no bandwidth estimate is available.

library/src/main/java/com/google/android/exoplayer/upstream/DefaultBandwidthMeter.java

@@ -26,25 +26,7 @@ import android.os.Handler;
  * Counts transferred bytes while transfers are open and creates a bandwidth sample and updated
  * bandwidth estimate each time a transfer ends.
  */
-public class DefaultBandwidthMeter implements BandwidthMeter, TransferListener {
+public class DefaultBandwidthMeter implements BandwidthMeter {
-
-  /**
-   * Interface definition for a callback to be notified of {@link DefaultBandwidthMeter} events.
-   */
-  public interface EventListener {
-
-    /**
-     * Invoked periodically to indicate that bytes have been transferred.
-     *
-     * @param elapsedMs The time taken to transfer the bytes, in milliseconds.
-     * @param bytes The number of bytes transferred.
-     * @param bitrate The estimated bitrate in bits/sec, or {@link #NO_ESTIMATE} if no estimate
-     *     is available. Note that this estimate is typically derived from more information than
-     *     {@code bytes} and {@code elapsedMs}.
-     */
-    void onBandwidthSample(int elapsedMs, long bytes, long bitrate);
-
-  }
 
   private static final int DEFAULT_MAX_WEIGHT = 2000;
 

library/src/main/java/com/google/android/exoplayer/upstream/DefaultHttpDataSource.java

@@ -28,6 +28,8 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.io.InterruptedIOException;
 import java.net.HttpURLConnection;
+import java.net.NoRouteToHostException;
+import java.net.ProtocolException;
 import java.net.URL;
 import java.util.HashMap;
 import java.util.List;
@@ -38,17 +40,30 @@ import java.util.regex.Pattern;
 
 /**
  * A {@link HttpDataSource} that uses Android's {@link HttpURLConnection}.
+ * <p>
+ * By default this implementation will not follow cross-protocol redirects (i.e. redirects from
+ * HTTP to HTTPS or vice versa). Cross-protocol redirects can be enabled by using the
+ * {@link #DefaultHttpDataSource(String, Predicate, TransferListener, int, int, boolean)}
+ * constructor and passing {@code true} as the final argument.
  */
 public class DefaultHttpDataSource implements HttpDataSource {
 
+  /**
+   * The default connection timeout, in milliseconds.
+   */
   public static final int DEFAULT_CONNECT_TIMEOUT_MILLIS = 8 * 1000;
+  /**
+   * The default read timeout, in milliseconds.
+   */
   public static final int DEFAULT_READ_TIMEOUT_MILLIS = 8 * 1000;
 
+  private static final int MAX_REDIRECTS = 20; // Same limit as okhttp.
   private static final String TAG = "HttpDataSource";
   private static final Pattern CONTENT_RANGE_HEADER =
       Pattern.compile("^bytes (\\d+)-(\\d+)/(\\d+)$");
   private static final AtomicReference<byte[]> skipBufferReference = new AtomicReference<byte[]>();
 
+  private final boolean allowCrossProtocolRedirects;
   private final int connectTimeoutMillis;
   private final int readTimeoutMillis;
   private final String userAgent;
@@ -103,12 +118,33 @@ public class DefaultHttpDataSource implements HttpDataSource {
    */
   public DefaultHttpDataSource(String userAgent, Predicate<String> contentTypePredicate,
       TransferListener listener, int connectTimeoutMillis, int readTimeoutMillis) {
+    this(userAgent, contentTypePredicate, listener, connectTimeoutMillis, readTimeoutMillis, false);
+  }
+
+  /**
+   * @param userAgent The User-Agent string that should be used.
+   * @param contentTypePredicate An optional {@link Predicate}. If a content type is
+   *     rejected by the predicate then a {@link HttpDataSource.InvalidContentTypeException} is
+   *     thrown from {@link #open(DataSpec)}.
+   * @param listener An optional listener.
+   * @param connectTimeoutMillis The connection timeout, in milliseconds. A timeout of zero is
+   *     interpreted as an infinite timeout. Pass {@link #DEFAULT_CONNECT_TIMEOUT_MILLIS} to use
+   *     the default value.
+   * @param readTimeoutMillis The read timeout, in milliseconds. A timeout of zero is interpreted
+   *     as an infinite timeout. Pass {@link #DEFAULT_READ_TIMEOUT_MILLIS} to use the default value.
+   * @param allowCrossProtocolRedirects Whether cross-protocol redirects (i.e. redirects from HTTP
+   *     to HTTPS and vice versa) are enabled.
+   */
+  public DefaultHttpDataSource(String userAgent, Predicate<String> contentTypePredicate,
+      TransferListener listener, int connectTimeoutMillis, int readTimeoutMillis,
+      boolean allowCrossProtocolRedirects) {
     this.userAgent = Assertions.checkNotEmpty(userAgent);
     this.contentTypePredicate = contentTypePredicate;
     this.listener = listener;
     this.requestProperties = new HashMap<String, String>();
     this.connectTimeoutMillis = connectTimeoutMillis;
     this.readTimeoutMillis = readTimeoutMillis;
+    this.allowCrossProtocolRedirects = allowCrossProtocolRedirects;
   }
 
   @Override
@@ -283,8 +319,58 @@ public class DefaultHttpDataSource implements HttpDataSource {
     return bytesToRead == C.LENGTH_UNBOUNDED ? bytesToRead : bytesToRead - bytesRead;
   }
 
+  /**
+   * Establishes a connection, following redirects to do so where permitted.
+   */
   private HttpURLConnection makeConnection(DataSpec dataSpec) throws IOException {
     URL url = new URL(dataSpec.uri.toString());
+    long position = dataSpec.position;
+    long length = dataSpec.length;
+    boolean allowGzip = (dataSpec.flags & DataSpec.FLAG_ALLOW_GZIP) != 0;
+
+    if (!allowCrossProtocolRedirects) {
+      // HttpURLConnection disallows cross-protocol redirects, but otherwise performs redirection
+      // automatically. This is the behavior we want, so use it.
+      HttpURLConnection connection = configureConnection(url, position, length, allowGzip);
+      connection.connect();
+      return connection;
+    }
+
+    // We need to handle redirects ourselves to allow cross-protocol redirects.
+    int redirectCount = 0;
+    while (redirectCount++ <= MAX_REDIRECTS) {
+      HttpURLConnection connection = configureConnection(url, position, length, allowGzip);
+      connection.setInstanceFollowRedirects(false);
+      connection.connect();
+      int responseCode = connection.getResponseCode();
+      if (responseCode == HttpURLConnection.HTTP_MULT_CHOICE
+          || responseCode == HttpURLConnection.HTTP_MOVED_PERM
+          || responseCode == HttpURLConnection.HTTP_MOVED_TEMP
+          || responseCode == HttpURLConnection.HTTP_SEE_OTHER
+          || responseCode == 307 /* HTTP_TEMP_REDIRECT */
+          || responseCode == 308 /* HTTP_PERM_REDIRECT */) {
+        String location = connection.getHeaderField("Location");
+        connection.disconnect();
+        url = handleRedirect(url, location);
+      } else {
+        return connection;
+      }
+    }
+
+    // If we get here we've been redirected more times than are permitted.
+    throw new NoRouteToHostException("Too many redirects: " + redirectCount);
+  }
+
+  /**
+   * Configures a connection, but does not open it.
+   *
+   * @param url The url to connect to.
+   * @param position The byte offset of the requested data.
+   * @param length The length of the requested data, or {@link C#LENGTH_UNBOUNDED}.
+   * @param allowGzip Whether to allow the use of gzip.
+   */
+  private HttpURLConnection configureConnection(URL url, long position, long length,
+      boolean allowGzip) throws IOException {
     HttpURLConnection connection = (HttpURLConnection) url.openConnection();
     connection.setConnectTimeout(connectTimeoutMillis);
     connection.setReadTimeout(readTimeoutMillis);
@@ -294,28 +380,56 @@ public class DefaultHttpDataSource implements HttpDataSource {
         connection.setRequestProperty(property.getKey(), property.getValue());
       }
     }
-    setRangeHeader(connection, dataSpec);
+    if (!(position == 0 && length == C.LENGTH_UNBOUNDED)) {
-    connection.setRequestProperty("User-Agent", userAgent);
+      String rangeRequest = "bytes=" + position + "-";
-    if ((dataSpec.flags & DataSpec.FLAG_ALLOW_GZIP) == 0) {
+      if (length != C.LENGTH_UNBOUNDED) {
-      connection.setRequestProperty("Accept-Encoding", "identity");
+        rangeRequest += (position + length - 1);
-    }
-    connection.connect();
-    return connection;
-  }
-
-  private void setRangeHeader(HttpURLConnection connection, DataSpec dataSpec) {
-    if (dataSpec.position == 0 && dataSpec.length == C.LENGTH_UNBOUNDED) {
-      // Not required.
-      return;
-    }
-    String rangeRequest = "bytes=" + dataSpec.position + "-";
-    if (dataSpec.length != C.LENGTH_UNBOUNDED) {
-      rangeRequest += (dataSpec.position + dataSpec.length - 1);
       }
       connection.setRequestProperty("Range", rangeRequest);
     }
+    connection.setRequestProperty("User-Agent", userAgent);
+    if (!allowGzip) {
+      connection.setRequestProperty("Accept-Encoding", "identity");
+    }
+    return connection;
+  }
 
-  private long getContentLength(HttpURLConnection connection) {
+  /**
+   * Handles a redirect.
+   *
+   * @param originalUrl The original URL.
+   * @param location The Location header in the response.
+   * @return The next URL.
+   * @throws IOException If redirection isn't possible.
+   */
+  private static URL handleRedirect(URL originalUrl, String location) throws IOException {
+    if (location == null) {
+      throw new ProtocolException("Null location redirect");
+    }
+    // Form the new url.
+    URL url = new URL(originalUrl, location);
+    // Check that the protocol of the new url is supported.
+    String protocol = url.getProtocol();
+    if (!"https".equals(protocol) && !"http".equals(protocol)) {
+      throw new ProtocolException("Unsupported protocol redirect: " + protocol);
+    }
+    // Currently this method is only called if allowCrossProtocolRedirects is true, and so the code
+    // below isn't required. If we ever decide to handle redirects ourselves when cross-protocol
+    // redirects are disabled, we'll need to uncomment this block of code.
+    // if (!allowCrossProtocolRedirects && !protocol.equals(originalUrl.getProtocol())) {
+    //   throw new ProtocolException("Disallowed cross-protocol redirect ("
+    //       + originalUrl.getProtocol() + " to " + protocol + ")");
+    // }
+    return url;
+  }
+
+  /**
+   * Attempts to extract the length of the content from the response headers of an open connection.
+   *
+   * @param connection The open connection.
+   * @return The extracted length, or {@link C#LENGTH_UNBOUNDED}.
+   */
+  private static long getContentLength(HttpURLConnection connection) {
     long contentLength = C.LENGTH_UNBOUNDED;
     String contentLengthHeader = connection.getHeaderField("Content-Length");
     if (!TextUtils.isEmpty(contentLengthHeader)) {
@@ -429,6 +543,9 @@ public class DefaultHttpDataSource implements HttpDataSource {
     return read;
   }
 
+  /**
+   * Closes the current connection, if there is one.
+   */
   private void closeConnection() {
     if (connection != null) {
       connection.disconnect();

library/src/main/java/com/google/android/exoplayer/upstream/DefaultUriDataSource.java

@@ -36,15 +36,36 @@ public final class DefaultUriDataSource implements UriDataSource {
   private UriDataSource dataSource;
 
   /**
-   * Constructs a new data source that delegates to a {@link FileDataSource} for file URIs and an
+   * Constructs a new data source that delegates to a {@link FileDataSource} for file URIs and a
    * {@link DefaultHttpDataSource} for other URIs.
+   * <p>
+   * The constructed instance will not follow cross-protocol redirects (i.e. redirects from HTTP to
+   * HTTPS or vice versa) when fetching remote data. Cross-protocol redirects can be enabled by
+   * using the {@link #DefaultUriDataSource(String, TransferListener, boolean)} constructor and
+   * passing {@code true} as the final argument.
    *
    * @param userAgent The User-Agent string that should be used when requesting remote data.
    * @param transferListener An optional listener.
    */
   public DefaultUriDataSource(String userAgent, TransferListener transferListener) {
+    this(userAgent, transferListener, false);
+  }
+
+  /**
+   * Constructs a new data source that delegates to a {@link FileDataSource} for file URIs and a
+   * {@link DefaultHttpDataSource} for other URIs.
+   *
+   * @param userAgent The User-Agent string that should be used when requesting remote data.
+   * @param transferListener An optional listener.
+   * @param allowCrossProtocolRedirects Whether cross-protocol redirects (i.e. redirects from HTTP
+   *     to HTTPS and vice versa) are enabled when fetching remote data..
+   */
+  public DefaultUriDataSource(String userAgent, TransferListener transferListener,
+      boolean allowCrossProtocolRedirects) {
     this(new FileDataSource(transferListener),
-        new DefaultHttpDataSource(userAgent, null, transferListener));
+        new DefaultHttpDataSource(userAgent, null, transferListener,
+            DefaultHttpDataSource.DEFAULT_CONNECT_TIMEOUT_MILLIS,
+            DefaultHttpDataSource.DEFAULT_READ_TIMEOUT_MILLIS, allowCrossProtocolRedirects));
   }
 
   /**

library/src/main/java/com/google/android/exoplayer/util/MimeTypes.java

@@ -15,6 +15,11 @@
  */
 package com.google.android.exoplayer.util;
 
+import com.google.android.exoplayer.C;
+import com.google.android.exoplayer.audio.AudioCapabilities;
+
+import android.media.AudioFormat;
+
 /**
  * Defines common MIME types and helper methods.
  */
@@ -119,4 +124,37 @@ public class MimeTypes {
     return mimeType.equals(APPLICATION_TTML);
   }
 
+  /**
+   * Returns the output audio encoding that will result from processing input in {@code mimeType}.
+   * For non-passthrough audio formats, this is always {@link AudioFormat#ENCODING_PCM_16BIT}. For
+   * passthrough formats it will be one of {@link AudioFormat}'s other {@code ENCODING_*} constants.
+   * For non-audio formats, {@link AudioFormat#ENCODING_INVALID} will be returned.
+   *
+   * @param mimeType The MIME type of media that will be decoded (or passed through).
+   * @return The corresponding {@link AudioFormat} encoding.
+   */
+  public static int getEncodingForMimeType(String mimeType) {
+    if (AUDIO_AC3.equals(mimeType)) {
+      return C.ENCODING_AC3;
+    }
+    if (AUDIO_EC3.equals(mimeType)) {
+      return C.ENCODING_E_AC3;
+    }
+
+    // All other audio formats will be decoded to 16-bit PCM.
+    return isAudio(mimeType) ? AudioFormat.ENCODING_PCM_16BIT : AudioFormat.ENCODING_INVALID;
+  }
+
+  /**
+   * Returns whether the specified {@code mimeType} represents audio that can be played via
+   * passthrough if the device supports it.
+   *
+   * @param mimeType The MIME type of input media.
+   * @return Whether the audio can be played via passthrough. If this method returns {@code true},
+   *     it is still necessary to check the {@link AudioCapabilities} for device support.
+   */
+  public static boolean isPassthroughAudio(String mimeType) {
+    return AUDIO_AC3.equals(mimeType) || AUDIO_EC3.equals(mimeType);
+  }
+
 }

library/src/main/project.properties

@@ -8,5 +8,5 @@
 # project structure.
 
 # Project target.
-target=android-21
+target=android-22
 android.library=true

library/src/test/AndroidManifest.xml

@@ -17,7 +17,7 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.google.android.exoplayer.tests">
 
-  <uses-sdk android:minSdkVersion="9" android:targetSdkVersion="21"/>
+  <uses-sdk android:minSdkVersion="9" android:targetSdkVersion="22"/>
 
   <application>
     <uses-library android:name="android.test.runner"/>

library/src/test/java/com/google/android/exoplayer/extractor/mp4/Mp4ExtractorTest.java

@@ -579,7 +579,7 @@ public class Mp4ExtractorTest extends TestCase {
           try {
             switch (message.what) {
               case MSG_PREPARE:
-                if (!source.prepare()) {
+                if (!source.prepare(0)) {
                   sendEmptyMessage(MSG_PREPARE);
                 } else {
                   // Select the video track and get its metadata.

library/src/test/project.properties

@@ -11,4 +11,4 @@
 #proguard.config=${sdk.dir}/tools/proguard/proguard-android.txt:proguard-project.txt
 
 # Project target.
-target=android-21
+target=android-22