Add support for SegmentTemplate and SegmentList mpds.

Misc Notes:
- Removed content type filters because some of third parties
  don't set content type.

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

@@ -52,7 +52,7 @@ public class SampleChooserActivity extends Activity {
     sampleAdapter.addAll((Object[]) Samples.SIMPLE);
     sampleAdapter.add(new Header("YouTube DASH"));
     sampleAdapter.addAll((Object[]) Samples.YOUTUBE_DASH_MP4);
-    sampleAdapter.add(new Header("Widevine DASH GTS"));
+    sampleAdapter.add(new Header("Widevine GTS DASH"));
     sampleAdapter.addAll((Object[]) Samples.WIDEVINE_GTS);
     sampleAdapter.add(new Header("SmoothStreaming"));
     sampleAdapter.addAll((Object[]) Samples.SMOOTHSTREAMING);

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

@@ -129,10 +129,6 @@ package com.google.android.exoplayer.demo;
         + "as=fmp4_audio_cenc,fmp4_sd_hd_cenc&sparams=ip,ipbits,expire,as&ip=0.0.0.0&ipbits=0"
         + "&expire=19000000000&signature=88DC53943385CED8CF9F37ADD9E9843E3BF621E6."
         + "22727BB612D24AA4FACE4EF62726F9461A9BF57A&key=ik0", DemoUtil.TYPE_DASH_VOD, true, true),
-        new Sample("WV: 30s license duration", "f9a34cab7b05881a",
-            "http://dash.edgesuite.net/digitalprimates/fraunhofer/480p_video/heaac_2_0_with_video/ElephantsDream/elephants_dream_480p_heaac2_0.mpd", DemoUtil.TYPE_DASH_VOD, false, true),
-        
-        
   };
 
   public static final Sample[] MISC = new Sample[] {

demo/src/main/java/com/google/android/exoplayer/demo/full/player/DashVodRendererBuilder.java

@@ -160,8 +160,7 @@ public class DashVodRendererBuilder implements RendererBuilder,
     }
 
     // Build the video renderer.
-    DataSource videoDataSource = new HttpDataSource(userAgent, HttpDataSource.REJECT_PAYWALL_TYPES,
-        bandwidthMeter);
+    DataSource videoDataSource = new HttpDataSource(userAgent, null, bandwidthMeter);
     ChunkSource videoChunkSource;
     String mimeType = videoRepresentations[0].format.mimeType;
     if (mimeType.equals(MimeTypes.VIDEO_MP4)) {
@@ -192,8 +191,7 @@ public class DashVodRendererBuilder implements RendererBuilder,
       audioChunkSource = null;
       audioRenderer = null;
     } else {
-      DataSource audioDataSource = new HttpDataSource(userAgent,
-          HttpDataSource.REJECT_PAYWALL_TYPES, bandwidthMeter);
+      DataSource audioDataSource = new HttpDataSource(userAgent, null, bandwidthMeter);
       audioTrackNames = new String[audioRepresentationsList.size()];
       ChunkSource[] audioChunkSources = new ChunkSource[audioRepresentationsList.size()];
       FormatEvaluator audioEvaluator = new FormatEvaluator.FixedEvaluator();

demo/src/main/java/com/google/android/exoplayer/demo/full/player/SmoothStreamingRendererBuilder.java

@@ -150,8 +150,7 @@ public class SmoothStreamingRendererBuilder implements RendererBuilder,
     }
 
     // Build the video renderer.
-    DataSource videoDataSource = new HttpDataSource(userAgent, HttpDataSource.REJECT_PAYWALL_TYPES,
-        bandwidthMeter);
+    DataSource videoDataSource = new HttpDataSource(userAgent, null, bandwidthMeter);
     ChunkSource videoChunkSource = new SmoothStreamingChunkSource(url, manifest,
         videoStreamElementIndex, videoTrackIndices, videoDataSource,
         new AdaptiveEvaluator(bandwidthMeter));
@@ -173,8 +172,7 @@ public class SmoothStreamingRendererBuilder implements RendererBuilder,
     } else {
       audioTrackNames = new String[audioStreamElementCount];
       ChunkSource[] audioChunkSources = new ChunkSource[audioStreamElementCount];
-      DataSource audioDataSource = new HttpDataSource(userAgent,
-          HttpDataSource.REJECT_PAYWALL_TYPES, bandwidthMeter);
+      DataSource audioDataSource = new HttpDataSource(userAgent, null, bandwidthMeter);
       FormatEvaluator audioFormatEvaluator = new FormatEvaluator.FixedEvaluator();
       audioStreamElementCount = 0;
       for (int i = 0; i < manifest.streamElements.length; i++) {
@@ -204,8 +202,7 @@ public class SmoothStreamingRendererBuilder implements RendererBuilder,
     } else {
       textTrackNames = new String[textStreamElementCount];
       ChunkSource[] textChunkSources = new ChunkSource[textStreamElementCount];
-      DataSource ttmlDataSource = new HttpDataSource(userAgent, HttpDataSource.REJECT_PAYWALL_TYPES,
-          bandwidthMeter);
+      DataSource ttmlDataSource = new HttpDataSource(userAgent, null, bandwidthMeter);
       FormatEvaluator ttmlFormatEvaluator = new FormatEvaluator.FixedEvaluator();
       textStreamElementCount = 0;
       for (int i = 0; i < manifest.streamElements.length; i++) {

demo/src/main/java/com/google/android/exoplayer/demo/simple/DashVodRendererBuilder.java

@@ -115,8 +115,7 @@ import java.util.ArrayList;
     videoRepresentationsList.toArray(videoRepresentations);
 
     // Build the video renderer.
-    DataSource videoDataSource = new HttpDataSource(userAgent, HttpDataSource.REJECT_PAYWALL_TYPES,
-        bandwidthMeter);
+    DataSource videoDataSource = new HttpDataSource(userAgent, null, bandwidthMeter);
     ChunkSource videoChunkSource = new DashMp4ChunkSource(videoDataSource,
         new AdaptiveEvaluator(bandwidthMeter), videoRepresentations);
     ChunkSampleSource videoSampleSource = new ChunkSampleSource(videoChunkSource, loadControl,
@@ -125,8 +124,7 @@ import java.util.ArrayList;
         MediaCodec.VIDEO_SCALING_MODE_SCALE_TO_FIT, 0, mainHandler, playerActivity, 50);
 
     // Build the audio renderer.
-    DataSource audioDataSource = new HttpDataSource(userAgent, HttpDataSource.REJECT_PAYWALL_TYPES,
-        bandwidthMeter);
+    DataSource audioDataSource = new HttpDataSource(userAgent, null, bandwidthMeter);
     ChunkSource audioChunkSource = new DashMp4ChunkSource(audioDataSource,
         new FormatEvaluator.FixedEvaluator(), audioRepresentation);
     SampleSource audioSampleSource = new ChunkSampleSource(audioChunkSource, loadControl,

demo/src/main/java/com/google/android/exoplayer/demo/simple/SmoothStreamingRendererBuilder.java

@@ -115,8 +115,7 @@ import java.util.ArrayList;
     }
 
     // Build the video renderer.
-    DataSource videoDataSource = new HttpDataSource(userAgent, HttpDataSource.REJECT_PAYWALL_TYPES,
-        bandwidthMeter);
+    DataSource videoDataSource = new HttpDataSource(userAgent, null, bandwidthMeter);
     ChunkSource videoChunkSource = new SmoothStreamingChunkSource(url, manifest,
         videoStreamElementIndex, videoTrackIndices, videoDataSource,
         new AdaptiveEvaluator(bandwidthMeter));
@@ -126,8 +125,7 @@ import java.util.ArrayList;
         MediaCodec.VIDEO_SCALING_MODE_SCALE_TO_FIT, 0, mainHandler, playerActivity, 50);
 
     // Build the audio renderer.
-    DataSource audioDataSource = new HttpDataSource(userAgent, HttpDataSource.REJECT_PAYWALL_TYPES,
-        bandwidthMeter);
+    DataSource audioDataSource = new HttpDataSource(userAgent, null, bandwidthMeter);
     ChunkSource audioChunkSource = new SmoothStreamingChunkSource(url, manifest,
         audioStreamElementIndex, new int[] {0}, audioDataSource,
         new FormatEvaluator.FixedEvaluator());

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

@@ -309,7 +309,7 @@ public class ChunkSampleSource implements SampleSource, Loader.Listener {
     }
 
     MediaFormat mediaFormat = mediaChunk.getMediaFormat();
-    if (downstreamMediaFormat == null || !downstreamMediaFormat.equals(mediaFormat)) {
+    if (mediaFormat != null && !mediaFormat.equals(downstreamMediaFormat)) {
       chunkSource.getMaxVideoDimensions(mediaFormat);
       formatHolder.format = mediaFormat;
       formatHolder.drmInitData = mediaChunk.getPsshInfo();

library/src/main/java/com/google/android/exoplayer/dash/DashMp4ChunkSource.java

@@ -74,7 +74,7 @@ public class DashMp4ChunkSource implements ChunkSource {
     this.segmentIndexes = new HashMap<String, DashSegmentIndex>();
     this.representations = new HashMap<String, Representation>();
     this.trackInfo = new TrackInfo(representations[0].format.mimeType,
-        representations[0].periodDuration * 1000);
+        representations[0].periodDurationMs * 1000);
     this.evaluation = new Evaluation();
     int maxWidth = 0;
     int maxHeight = 0;
@@ -198,7 +198,7 @@ public class DashMp4ChunkSource implements ChunkSource {
     RangedUri requestUri;
     if (initializationUri != null) {
       // It's common for initialization and index data to be stored adjacently. Attempt to merge
-      // the two requests together to request at once.
+      // the two requests together to request both at once.
       expectedExtractorResult |= FragmentedMp4Extractor.RESULT_READ_MOOV;
       requestUri = initializationUri.attemptMerge(indexUri);
       if (requestUri != null) {

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

@@ -70,7 +70,7 @@ public class DashWebmChunkSource implements ChunkSource {
     this.segmentIndexes = new HashMap<String, DashSegmentIndex>();
     this.representations = new HashMap<String, Representation>();
     this.trackInfo = new TrackInfo(
-        representations[0].format.mimeType, representations[0].periodDuration * 1000);
+        representations[0].format.mimeType, representations[0].periodDurationMs * 1000);
     this.evaluation = new Evaluation();
     int maxWidth = 0;
     int maxHeight = 0;

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

@@ -17,7 +17,10 @@ package com.google.android.exoplayer.dash.mpd;
 
 import com.google.android.exoplayer.ParserException;
 import com.google.android.exoplayer.chunk.Format;
-import com.google.android.exoplayer.upstream.DataSpec;
+import com.google.android.exoplayer.dash.mpd.SegmentBase.SegmentList;
+import com.google.android.exoplayer.dash.mpd.SegmentBase.SegmentTemplate;
+import com.google.android.exoplayer.dash.mpd.SegmentBase.SegmentTimelineElement;
+import com.google.android.exoplayer.dash.mpd.SegmentBase.SingleSegmentBase;
 import com.google.android.exoplayer.util.Assertions;
 import com.google.android.exoplayer.util.MimeTypes;
 
@@ -39,11 +42,6 @@ import java.util.regex.Pattern;
 /**
  * A parser of media presentation description files.
  */
-/*
- * TODO: Parse representation base attributes at multiple levels, and normalize the resulting
- * datastructure.
- * TODO: Decide how best to represent missing integer/double/long attributes.
- */
 public class MediaPresentationDescriptionParser extends DefaultHandler {
 
   // Note: Does not support the date part of ISO 8601
@@ -60,6 +58,8 @@ public class MediaPresentationDescriptionParser extends DefaultHandler {
     }
   }
 
+  // MPD parsing.
+
   /**
    * Parses a manifest from the provided {@link InputStream}.
    *
@@ -86,96 +86,69 @@ public class MediaPresentationDescriptionParser extends DefaultHandler {
   }
 
   private MediaPresentationDescription parseMediaPresentationDescription(XmlPullParser xpp,
-      String contentId, Uri parentBaseUrl) throws XmlPullParserException, IOException {
-    Uri baseUrl = parentBaseUrl;
-    long duration = parseDurationMs(xpp, "mediaPresentationDuration");
-    long minBufferTime = parseDurationMs(xpp, "minBufferTime");
+      String contentId, Uri baseUrl) throws XmlPullParserException, IOException {
+    long durationMs = parseDurationMs(xpp, "mediaPresentationDuration");
+    long minBufferTimeMs = parseDurationMs(xpp, "minBufferTime");
     String typeString = xpp.getAttributeValue(null, "type");
     boolean dynamic = (typeString != null) ? typeString.equals("dynamic") : false;
-    long minUpdateTime = (dynamic) ? parseDurationMs(xpp, "minimumUpdatePeriod", -1) : -1;
+    long minUpdateTimeMs = (dynamic) ? parseDurationMs(xpp, "minimumUpdatePeriod", -1) : -1;
 
     List<Period> periods = new ArrayList<Period>();
     do {
       xpp.next();
       if (isStartTag(xpp, "BaseURL")) {
-        baseUrl = parseBaseUrl(xpp, parentBaseUrl);
+        baseUrl = parseBaseUrl(xpp, baseUrl);
       } else if (isStartTag(xpp, "Period")) {
-        periods.add(parsePeriod(xpp, contentId, baseUrl, duration));
+        periods.add(parsePeriod(xpp, contentId, baseUrl, durationMs));
       }
     } while (!isEndTag(xpp, "MPD"));
 
-    return new MediaPresentationDescription(duration, minBufferTime, dynamic, minUpdateTime,
+    return new MediaPresentationDescription(durationMs, minBufferTimeMs, dynamic, minUpdateTimeMs,
         periods);
   }
 
-  private Period parsePeriod(XmlPullParser xpp, String contentId, Uri parentBaseUrl,
-      long mediaPresentationDuration) throws XmlPullParserException, IOException {
-    Uri baseUrl = parentBaseUrl;
+  private Period parsePeriod(XmlPullParser xpp, String contentId, Uri baseUrl, long mpdDurationMs)
+      throws XmlPullParserException, IOException {
     String id = xpp.getAttributeValue(null, "id");
-    long start = parseDurationMs(xpp, "start", 0);
-    long duration = parseDurationMs(xpp, "duration", mediaPresentationDuration);
-
+    long startMs = parseDurationMs(xpp, "start", 0);
+    long durationMs = parseDurationMs(xpp, "duration", mpdDurationMs);
+    SegmentBase segmentBase = null;
     List<AdaptationSet> adaptationSets = new ArrayList<AdaptationSet>();
-    List<Segment.Timeline> segmentTimelineList = null;
-    int segmentStartNumber = 0;
-    int segmentTimescale = 0;
-    long presentationTimeOffset = 0;
     do {
       xpp.next();
       if (isStartTag(xpp, "BaseURL")) {
-        baseUrl = parseBaseUrl(xpp, parentBaseUrl);
+        baseUrl = parseBaseUrl(xpp, baseUrl);
       } else if (isStartTag(xpp, "AdaptationSet")) {
-        adaptationSets.add(parseAdaptationSet(xpp, contentId, baseUrl, start, duration,
-            segmentTimelineList));
+        adaptationSets.add(parseAdaptationSet(xpp, contentId, baseUrl, startMs, durationMs,
+            segmentBase));
+      } else if (isStartTag(xpp, "SegmentBase")) {
+        segmentBase = parseSegmentBase(xpp, baseUrl, null);
       } else if (isStartTag(xpp, "SegmentList")) {
-        segmentStartNumber = parseInt(xpp, "startNumber");
-        segmentTimescale = parseInt(xpp, "timescale");
-        presentationTimeOffset = parseLong(xpp, "presentationTimeOffset", 0);
-        segmentTimelineList = parsePeriodSegmentList(xpp, segmentStartNumber);
+        segmentBase = parseSegmentList(xpp, baseUrl, null, durationMs);
+      } else if (isStartTag(xpp, "SegmentTemplate")) {
+        segmentBase = parseSegmentTemplate(xpp, baseUrl, null, durationMs);
       }
     } while (!isEndTag(xpp, "Period"));
 
-    return new Period(id, start, duration, adaptationSets, segmentTimelineList,
-        segmentStartNumber, segmentTimescale, presentationTimeOffset);
+    return new Period(id, startMs, durationMs, adaptationSets);
   }
 
-  private List<Segment.Timeline> parsePeriodSegmentList(
-      XmlPullParser xpp, long segmentStartNumber) throws XmlPullParserException, IOException {
-    List<Segment.Timeline> segmentTimelineList = new ArrayList<Segment.Timeline>();
+  // AdaptationSet parsing.
 
-    do {
-      xpp.next();
-      if (isStartTag(xpp, "SegmentTimeline")) {
-        do {
-          xpp.next();
-          if (isStartTag(xpp, "S")) {
-            long duration = parseLong(xpp, "d");
-            segmentTimelineList.add(new Segment.Timeline(segmentStartNumber, duration));
-            segmentStartNumber++;
-          }
-        } while (!isEndTag(xpp, "SegmentTimeline"));
-      }
-    } while (!isEndTag(xpp, "SegmentList"));
-
-    return segmentTimelineList;
-  }
-
-  private AdaptationSet parseAdaptationSet(XmlPullParser xpp, String contentId, Uri parentBaseUrl,
-      long periodStart, long periodDuration, List<Segment.Timeline> segmentTimelineList)
+  private AdaptationSet parseAdaptationSet(XmlPullParser xpp, String contentId, Uri baseUrl,
+      long periodStartMs, long periodDurationMs, SegmentBase segmentBase)
       throws XmlPullParserException, IOException {
-    Uri baseUrl = parentBaseUrl;
-    int id = -1;
 
-    // TODO: Correctly handle other common attributes and elements. See 23009-1 Table 9.
     String mimeType = xpp.getAttributeValue(null, "mimeType");
     int contentType = parseAdaptationSetTypeFromMimeType(mimeType);
 
+    int id = -1;
     List<ContentProtection> contentProtections = null;
     List<Representation> representations = new ArrayList<Representation>();
     do {
       xpp.next();
       if (isStartTag(xpp, "BaseURL")) {
-        baseUrl = parseBaseUrl(xpp, parentBaseUrl);
+        baseUrl = parseBaseUrl(xpp, baseUrl);
       } else if (isStartTag(xpp, "ContentProtection")) {
         if (contentProtections == null) {
           contentProtections = new ArrayList<ContentProtection>();
@@ -186,17 +159,62 @@ public class MediaPresentationDescriptionParser extends DefaultHandler {
         contentType = checkAdaptationSetTypeConsistency(contentType,
             parseAdaptationSetType(xpp.getAttributeValue(null, "contentType")));
       } else if (isStartTag(xpp, "Representation")) {
-        Representation representation = parseRepresentation(xpp, contentId, baseUrl, periodStart,
-            periodDuration, mimeType, segmentTimelineList);
+        Representation representation = parseRepresentation(xpp, contentId, baseUrl, periodStartMs,
+            periodDurationMs, mimeType, segmentBase);
         contentType = checkAdaptationSetTypeConsistency(contentType,
             parseAdaptationSetTypeFromMimeType(representation.format.mimeType));
         representations.add(representation);
+      } else if (isStartTag(xpp, "SegmentBase")) {
+        segmentBase = parseSegmentBase(xpp, baseUrl, (SingleSegmentBase) segmentBase);
+      } else if (isStartTag(xpp, "SegmentList")) {
+        segmentBase = parseSegmentList(xpp, baseUrl, (SegmentList) segmentBase, periodDurationMs);
+      } else if (isStartTag(xpp, "SegmentTemplate")) {
+        segmentBase = parseSegmentTemplate(xpp, baseUrl, (SegmentTemplate) segmentBase,
+            periodDurationMs);
       }
     } while (!isEndTag(xpp, "AdaptationSet"));
 
     return new AdaptationSet(id, contentType, representations, contentProtections);
   }
 
+  private int parseAdaptationSetType(String contentType) {
+    return TextUtils.isEmpty(contentType) ? AdaptationSet.TYPE_UNKNOWN
+        : MimeTypes.BASE_TYPE_AUDIO.equals(contentType) ? AdaptationSet.TYPE_AUDIO
+        : MimeTypes.BASE_TYPE_VIDEO.equals(contentType) ? AdaptationSet.TYPE_VIDEO
+        : MimeTypes.BASE_TYPE_TEXT.equals(contentType) ? AdaptationSet.TYPE_TEXT
+        : AdaptationSet.TYPE_UNKNOWN;
+  }
+
+  private int parseAdaptationSetTypeFromMimeType(String mimeType) {
+    return TextUtils.isEmpty(mimeType) ? AdaptationSet.TYPE_UNKNOWN
+        : MimeTypes.isAudio(mimeType) ? AdaptationSet.TYPE_AUDIO
+        : MimeTypes.isVideo(mimeType) ? AdaptationSet.TYPE_VIDEO
+        : MimeTypes.isText(mimeType) || MimeTypes.isTtml(mimeType) ? AdaptationSet.TYPE_TEXT
+        : AdaptationSet.TYPE_UNKNOWN;
+  }
+
+  /**
+   * Checks two adaptation set types for consistency, returning the consistent type, or throwing an
+   * {@link IllegalStateException} if the types are inconsistent.
+   * <p>
+   * Two types are consistent if they are equal, or if one is {@link AdaptationSet#TYPE_UNKNOWN}.
+   * Where one of the types is {@link AdaptationSet#TYPE_UNKNOWN}, the other is returned.
+   *
+   * @param firstType The first type.
+   * @param secondType The second type.
+   * @return The consistent type.
+   */
+  private int checkAdaptationSetTypeConsistency(int firstType, int secondType) {
+    if (firstType == AdaptationSet.TYPE_UNKNOWN) {
+      return secondType;
+    } else if (secondType == AdaptationSet.TYPE_UNKNOWN) {
+      return firstType;
+    } else {
+      Assertions.checkState(firstType == secondType);
+      return firstType;
+    }
+  }
+
   /**
    * Parses a ContentProtection element.
    *
@@ -209,114 +227,204 @@ public class MediaPresentationDescriptionParser extends DefaultHandler {
     return new ContentProtection(schemeUriId, null);
   }
 
-  private Representation parseRepresentation(XmlPullParser xpp, String contentId, Uri parentBaseUrl,
-      long periodStart, long periodDuration, String parentMimeType,
-      List<Segment.Timeline> segmentTimelineList) throws XmlPullParserException, IOException {
-    Uri baseUrl = parentBaseUrl;
+  // Representation parsing.
+
+  private Representation parseRepresentation(XmlPullParser xpp, String contentId, Uri baseUrl,
+      long periodStartMs, long periodDurationMs, String mimeType, SegmentBase segmentBase)
+      throws XmlPullParserException, IOException {
     String id = xpp.getAttributeValue(null, "id");
     int bandwidth = parseInt(xpp, "bandwidth");
     int audioSamplingRate = parseInt(xpp, "audioSamplingRate");
     int width = parseInt(xpp, "width");
     int height = parseInt(xpp, "height");
+    mimeType = parseString(xpp, "mimeType", mimeType);
 
-    String mimeType = xpp.getAttributeValue(null, "mimeType");
-    if (mimeType == null) {
-      mimeType = parentMimeType;
-    }
-
-    long indexStart = -1;
-    long indexEnd = -1;
-    long initializationStart = -1;
-    long initializationEnd = -1;
     int numChannels = -1;
-    List<Segment> segmentList = null;
     do {
       xpp.next();
       if (isStartTag(xpp, "BaseURL")) {
-        baseUrl = parseBaseUrl(xpp, parentBaseUrl);
+        baseUrl = parseBaseUrl(xpp, baseUrl);
       } else if (isStartTag(xpp, "AudioChannelConfiguration")) {
         numChannels = Integer.parseInt(xpp.getAttributeValue(null, "value"));
       } else if (isStartTag(xpp, "SegmentBase")) {
-        String[] indexRange = xpp.getAttributeValue(null, "indexRange").split("-");
-        indexStart = Long.parseLong(indexRange[0]);
-        indexEnd = Long.parseLong(indexRange[1]);
+        segmentBase = parseSegmentBase(xpp, baseUrl, (SingleSegmentBase) segmentBase);
       } else if (isStartTag(xpp, "SegmentList")) {
-        segmentList = parseRepresentationSegmentList(xpp, segmentTimelineList);
-      } else if (isStartTag(xpp, "Initialization")) {
-        String[] indexRange = xpp.getAttributeValue(null, "range").split("-");
-        initializationStart = Long.parseLong(indexRange[0]);
-        initializationEnd = Long.parseLong(indexRange[1]);
+        segmentBase = parseSegmentList(xpp, baseUrl, (SegmentList) segmentBase, periodDurationMs);
+      } else if (isStartTag(xpp, "SegmentTemplate")) {
+        segmentBase = parseSegmentTemplate(xpp, baseUrl, (SegmentTemplate) segmentBase,
+            periodDurationMs);
       }
     } while (!isEndTag(xpp, "Representation"));
 
     Format format = new Format(id, mimeType, width, height, numChannels, audioSamplingRate,
         bandwidth);
-    if (segmentList == null) {
-      return new Representation(contentId, -1, format, baseUrl, DataSpec.LENGTH_UNBOUNDED,
-          initializationStart, initializationEnd, indexStart, indexEnd, periodStart,
-          periodDuration);
-    } else {
-      return new SegmentedRepresentation(contentId, format, baseUrl, initializationStart,
-          initializationEnd, indexStart, indexEnd, periodStart, periodDuration, segmentList);
+    return Representation.newInstance(periodStartMs, periodDurationMs, contentId, -1, format,
+        segmentBase);
   }
+
+  // SegmentBase, SegmentList and SegmentTemplate parsing.
+
+  private SingleSegmentBase parseSegmentBase(XmlPullParser xpp, Uri baseUrl,
+      SingleSegmentBase parent) throws XmlPullParserException, IOException {
+
+    long timescale = parseLong(xpp, "timescale", parent != null ? parent.timescale : 1);
+    long presentationTimeOffset = parseLong(xpp, "presentationTimeOffset",
+        parent != null ? parent.presentationTimeOffset : 0);
+
+    long indexStart = parent != null ? parent.indexStart : 0;
+    long indexLength = parent != null ? parent.indexLength : -1;
+    String indexRangeText = xpp.getAttributeValue(null, "indexRange");
+    if (indexRangeText != null) {
+      String[] indexRange = indexRangeText.split("-");
+      indexStart = Long.parseLong(indexRange[0]);
+      indexLength = Long.parseLong(indexRange[1]) - indexStart + 1;
     }
 
-  private List<Segment> parseRepresentationSegmentList(XmlPullParser xpp,
-      List<Segment.Timeline> segmentTimelineList) throws XmlPullParserException, IOException {
-    List<Segment> segmentList = new ArrayList<Segment>();
-    int i = 0;
+    RangedUri initialization = parent != null ? parent.initialization : null;
+    do {
+      xpp.next();
+      if (isStartTag(xpp, "Initialization")) {
+        initialization = parseInitialization(xpp, baseUrl);
+      }
+    } while (!isEndTag(xpp, "SegmentBase"));
+
+    return new SingleSegmentBase(initialization, timescale, presentationTimeOffset, baseUrl,
+        indexStart, indexLength);
+  }
+
+  private SegmentList parseSegmentList(XmlPullParser xpp, Uri baseUrl, SegmentList parent,
+      long periodDuration) throws XmlPullParserException, IOException {
+
+    long timescale = parseLong(xpp, "timescale", parent != null ? parent.timescale : 1);
+    long presentationTimeOffset = parseLong(xpp, "presentationTimeOffset",
+        parent != null ? parent.presentationTimeOffset : 0);
+    long duration = parseLong(xpp, "duration", parent != null ? parent.duration : -1);
+    int startNumber = parseInt(xpp, "startNumber", parent != null ? parent.startNumber : 0);
+
+    RangedUri initialization = null;
+    List<SegmentTimelineElement> timeline = null;
+    List<RangedUri> segments = null;
 
     do {
       xpp.next();
       if (isStartTag(xpp, "Initialization")) {
-        String url = xpp.getAttributeValue(null, "sourceURL");
-        String[] indexRange = xpp.getAttributeValue(null, "range").split("-");
-        long initializationStart = Long.parseLong(indexRange[0]);
-        long initializationEnd = Long.parseLong(indexRange[1]);
-        segmentList.add(new Segment.Initialization(url, initializationStart, initializationEnd));
+        initialization = parseInitialization(xpp, baseUrl);
+      } else if (isStartTag(xpp, "SegmentTimeline")) {
+        timeline = parseSegmentTimeline(xpp);
       } else if (isStartTag(xpp, "SegmentURL")) {
-        String url = xpp.getAttributeValue(null, "media");
-        String mediaRange = xpp.getAttributeValue(null, "mediaRange");
-        long sequenceNumber = segmentTimelineList.get(i).sequenceNumber;
-        long duration = segmentTimelineList.get(i).duration;
-        i++;
-        if (mediaRange != null) {
-          String[] mediaRangeArray = xpp.getAttributeValue(null, "mediaRange").split("-");
-          long mediaStart = Long.parseLong(mediaRangeArray[0]);
-          segmentList.add(new Segment.Media(url, mediaStart, sequenceNumber, duration));
-        } else {
-          segmentList.add(new Segment.Media(url, sequenceNumber, duration));
+        if (segments == null) {
+          segments = new ArrayList<RangedUri>();
         }
+        segments.add(parseSegmentUrl(xpp, baseUrl));
       }
     } while (!isEndTag(xpp, "SegmentList"));
 
-    return segmentList;
+    if (parent != null) {
+      initialization = initialization != null ? initialization : parent.initialization;
+      timeline = timeline != null ? timeline : parent.segmentTimeline;
+      segments = segments != null ? segments : parent.mediaSegments;
     }
 
-  protected static boolean isEndTag(XmlPullParser xpp, String name) throws XmlPullParserException {
-    return xpp.getEventType() == XmlPullParser.END_TAG && name.equals(xpp.getName());
+    return new SegmentList(initialization, timescale, presentationTimeOffset, periodDuration,
+        startNumber, duration, timeline, segments);
   }
 
-  protected static boolean isStartTag(XmlPullParser xpp, String name)
-      throws XmlPullParserException {
-    return xpp.getEventType() == XmlPullParser.START_TAG && name.equals(xpp.getName());
+  private SegmentTemplate parseSegmentTemplate(XmlPullParser xpp, Uri baseUrl,
+      SegmentTemplate parent, long periodDuration) throws XmlPullParserException, IOException {
+
+    long timescale = parseLong(xpp, "timescale", parent != null ? parent.timescale : 1);
+    long presentationTimeOffset = parseLong(xpp, "presentationTimeOffset",
+        parent != null ? parent.presentationTimeOffset : 0);
+    long duration = parseLong(xpp, "duration", parent != null ? parent.duration : -1);
+    int startNumber = parseInt(xpp, "startNumber", parent != null ? parent.startNumber : 0);
+    UrlTemplate mediaTemplate = parseUrlTemplate(xpp, "media",
+        parent != null ? parent.mediaTemplate : null);
+    UrlTemplate initializationTemplate = parseUrlTemplate(xpp, "initialization",
+        parent != null ? parent.initializationTemplate : null);
+
+    RangedUri initialization = null;
+    List<SegmentTimelineElement> timeline = null;
+
+    do {
+      xpp.next();
+      if (isStartTag(xpp, "Initialization")) {
+        initialization = parseInitialization(xpp, baseUrl);
+      } else if (isStartTag(xpp, "SegmentTimeline")) {
+        timeline = parseSegmentTimeline(xpp);
       }
+    } while (!isEndTag(xpp, "SegmentTemplate"));
 
-  protected static int parseInt(XmlPullParser xpp, String name) {
-    String value = xpp.getAttributeValue(null, name);
-    return value == null ? -1 : Integer.parseInt(value);
+    if (parent != null) {
+      initialization = initialization != null ? initialization : parent.initialization;
+      timeline = timeline != null ? timeline : parent.segmentTimeline;
     }
 
-  protected static long parseLong(XmlPullParser xpp, String name) {
-    return parseLong(xpp, name, -1);
+    return new SegmentTemplate(initialization, timescale, presentationTimeOffset, periodDuration,
+        startNumber, duration, timeline, initializationTemplate, mediaTemplate, baseUrl);
   }
 
-  protected static long parseLong(XmlPullParser xpp, String name, long defaultValue) {
-    String value = xpp.getAttributeValue(null, name);
-    return value == null ? defaultValue : Long.parseLong(value);
+  private List<SegmentTimelineElement> parseSegmentTimeline(XmlPullParser xpp)
+      throws XmlPullParserException, IOException {
+    List<SegmentTimelineElement> segmentTimeline = new ArrayList<SegmentTimelineElement>();
+    long elapsedTime = 0;
+    do {
+      xpp.next();
+      if (isStartTag(xpp, "S")) {
+        elapsedTime = parseLong(xpp, "t", elapsedTime);
+        long duration = parseLong(xpp, "d");
+        int count = 1 + parseInt(xpp, "r", 0);
+        for (int i = 0; i < count; i++) {
+          segmentTimeline.add(new SegmentTimelineElement(elapsedTime, duration));
+          elapsedTime += duration;
+        }
+      }
+    } while (!isEndTag(xpp, "SegmentTimeline"));
+    return segmentTimeline;
+  }
+
+  private UrlTemplate parseUrlTemplate(XmlPullParser xpp, String name,
+      UrlTemplate defaultValue) {
+    String valueString = xpp.getAttributeValue(null, name);
+    if (valueString != null) {
+      return UrlTemplate.compile(valueString);
+    }
+    return defaultValue;
   }
 
-  private long parseDurationMs(XmlPullParser xpp, String name) {
+  private RangedUri parseInitialization(XmlPullParser xpp, Uri baseUrl) {
+    return parseRangedUrl(xpp, baseUrl, "sourceURL", "range");
+  }
+
+  private RangedUri parseSegmentUrl(XmlPullParser xpp, Uri baseUrl) {
+    return parseRangedUrl(xpp, baseUrl, "media", "mediaRange");
+  }
+
+  private RangedUri parseRangedUrl(XmlPullParser xpp, Uri baseUrl, String urlAttribute,
+      String rangeAttribute) {
+    String urlText = xpp.getAttributeValue(null, urlAttribute);
+    long rangeStart = 0;
+    long rangeLength = -1;
+    String rangeText = xpp.getAttributeValue(null, rangeAttribute);
+    if (rangeText != null) {
+      String[] rangeTextArray = rangeText.split("-");
+      rangeStart = Long.parseLong(rangeTextArray[0]);
+      rangeLength = Long.parseLong(rangeTextArray[1]) - rangeStart + 1;
+    }
+    return new RangedUri(baseUrl, urlText, rangeStart, rangeLength);
+  }
+
+  // Utility methods.
+
+  protected static boolean isEndTag(XmlPullParser xpp, String name) throws XmlPullParserException {
+    return xpp.getEventType() == XmlPullParser.END_TAG && name.equals(xpp.getName());
+  }
+
+  protected static boolean isStartTag(XmlPullParser xpp, String name)
+      throws XmlPullParserException {
+    return xpp.getEventType() == XmlPullParser.START_TAG && name.equals(xpp.getName());
+  }
+
+  private static long parseDurationMs(XmlPullParser xpp, String name) {
     return parseDurationMs(xpp, name, -1);
   }
 
@@ -339,54 +447,38 @@ public class MediaPresentationDescriptionParser extends DefaultHandler {
     return defaultValue;
   }
 
-  private static Uri parseBaseUrl(XmlPullParser xpp, Uri parentBaseUrl)
+  protected static Uri parseBaseUrl(XmlPullParser xpp, Uri parentBaseUrl)
       throws XmlPullParserException, IOException {
     xpp.next();
     String newBaseUrlText = xpp.getText();
     Uri newBaseUri = Uri.parse(newBaseUrlText);
-    if (newBaseUri.isAbsolute()) {
+    if (!newBaseUri.isAbsolute()) {
+      newBaseUri = Uri.withAppendedPath(parentBaseUrl, newBaseUrlText);
+    }
     return newBaseUri;
-    } else {
-      return parentBaseUrl.buildUpon().appendEncodedPath(newBaseUrlText).build();
   }
+
+  protected static int parseInt(XmlPullParser xpp, String name) {
+    return parseInt(xpp, name, -1);
   }
 
-  private static int parseAdaptationSetType(String contentType) {
-    return TextUtils.isEmpty(contentType) ? AdaptationSet.TYPE_UNKNOWN
-        : MimeTypes.BASE_TYPE_AUDIO.equals(contentType) ? AdaptationSet.TYPE_AUDIO
-        : MimeTypes.BASE_TYPE_VIDEO.equals(contentType) ? AdaptationSet.TYPE_VIDEO
-        : MimeTypes.BASE_TYPE_TEXT.equals(contentType) ? AdaptationSet.TYPE_TEXT
-        : AdaptationSet.TYPE_UNKNOWN;
+  protected static int parseInt(XmlPullParser xpp, String name, int defaultValue) {
+    String value = xpp.getAttributeValue(null, name);
+    return value == null ? defaultValue : Integer.parseInt(value);
   }
 
-  private static int parseAdaptationSetTypeFromMimeType(String mimeType) {
-    return TextUtils.isEmpty(mimeType) ? AdaptationSet.TYPE_UNKNOWN
-        : MimeTypes.isAudio(mimeType) ? AdaptationSet.TYPE_AUDIO
-        : MimeTypes.isVideo(mimeType) ? AdaptationSet.TYPE_VIDEO
-        : MimeTypes.isText(mimeType) || MimeTypes.isTtml(mimeType) ? AdaptationSet.TYPE_TEXT
-        : AdaptationSet.TYPE_UNKNOWN;
+  protected static long parseLong(XmlPullParser xpp, String name) {
+    return parseLong(xpp, name, -1);
   }
 
-  /**
-   * Checks two adaptation set types for consistency, returning the consistent type, or throwing an
-   * {@link IllegalStateException} if the types are inconsistent.
-   * <p>
-   * Two types are consistent if they are equal, or if one is {@link AdaptationSet#TYPE_UNKNOWN}.
-   * Where one of the types is {@link AdaptationSet#TYPE_UNKNOWN}, the other is returned.
-   *
-   * @param firstType The first type.
-   * @param secondType The second type.
-   * @return The consistent type.
-   */
-  private static int checkAdaptationSetTypeConsistency(int firstType, int secondType) {
-    if (firstType == AdaptationSet.TYPE_UNKNOWN) {
-      return secondType;
-    } else if (secondType == AdaptationSet.TYPE_UNKNOWN) {
-      return firstType;
-    } else {
-      Assertions.checkState(firstType == secondType);
-      return firstType;
+  protected static long parseLong(XmlPullParser xpp, String name, long defaultValue) {
+    String value = xpp.getAttributeValue(null, name);
+    return value == null ? defaultValue : Long.parseLong(value);
   }
+
+  protected static String parseString(XmlPullParser xpp, String name, String defaultValue) {
+    String value = xpp.getAttributeValue(null, name);
+    return value == null ? defaultValue : value;
   }
 
 }

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

@@ -23,46 +23,37 @@ import java.util.List;
  */
 public final class Period {
 
+  /**
+   * The period identifier, if one exists.
+   */
   public final String id;
 
-  public final long start;
+  /**
+   * The start time of the period in milliseconds.
+   */
+  public final long startMs;
 
-  public final long duration;
+  /**
+   * The duration of the period in milliseconds, or -1 if the duration is unknown.
+   */
+  public final long durationMs;
 
+  /**
+   * The adaptation sets belonging to the period.
+   */
   public final List<AdaptationSet> adaptationSets;
 
-  public final List<Segment.Timeline> segmentList;
-
-  public final int segmentStartNumber;
-
-  public final int segmentTimescale;
-
-  public final long presentationTimeOffset;
-
+  /**
+   * @param id The period identifier. May be null.
+   * @param start The start time of the period in milliseconds.
+   * @param duration The duration of the period in milliseconds, or -1 if the duration is unknown.
+   * @param adaptationSets The adaptation sets belonging to the period.
+   */
   public Period(String id, long start, long duration, List<AdaptationSet> adaptationSets) {
-    this(id, start, duration, adaptationSets, null, 0, 0, 0);
-  }
-
-  public Period(String id, long start, long duration, List<AdaptationSet> adaptationSets,
-      List<Segment.Timeline> segmentList, int segmentStartNumber, int segmentTimescale) {
-    this(id, start, duration, adaptationSets, segmentList, segmentStartNumber, segmentTimescale, 0);
-  }
-
-  public Period(String id, long start, long duration, List<AdaptationSet> adaptationSets,
-      List<Segment.Timeline> segmentList, int segmentStartNumber, int segmentTimescale,
-      long presentationTimeOffset) {
     this.id = id;
-    this.start = start;
-    this.duration = duration;
+    this.startMs = start;
+    this.durationMs = duration;
     this.adaptationSets = Collections.unmodifiableList(adaptationSets);
-    if (segmentList != null) {
-      this.segmentList = Collections.unmodifiableList(segmentList);
-    } else {
-      this.segmentList = null;
-    }
-    this.segmentStartNumber = segmentStartNumber;
-    this.segmentTimescale = segmentTimescale;
-    this.presentationTimeOffset = presentationTimeOffset;
   }
 
 }

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

@@ -17,13 +17,15 @@ package com.google.android.exoplayer.dash.mpd;
 
 import com.google.android.exoplayer.chunk.Format;
 import com.google.android.exoplayer.dash.DashSegmentIndex;
+import com.google.android.exoplayer.dash.mpd.SegmentBase.MultiSegmentBase;
+import com.google.android.exoplayer.dash.mpd.SegmentBase.SingleSegmentBase;
 
 import android.net.Uri;
 
 /**
- * A flat version of a DASH representation.
+ * A DASH representation.
  */
-public class Representation {
+public abstract class Representation {
 
   /**
    * Identifies the piece of content to which this {@link Representation} belongs.
@@ -34,7 +36,7 @@ public class Representation {
   public final String contentId;
 
   /**
-   * Identifies the revision of the {@link Representation}.
+   * Identifies the revision of the content.
    * <p>
    * If the media for a given ({@link #contentId} can change over time without a change to the
    * {@link #format}'s {@link Format#id} (e.g. as a result of re-encoding the media with an
@@ -44,40 +46,62 @@ public class Representation {
   public final long revisionId;
 
   /**
-   * The format in which the {@link Representation} is encoded.
+   * The format of the representation.
    */
   public final Format format;
 
-  public final long contentLength;
-
-  public final long initializationStart;
-
-  public final long initializationEnd;
-
-  public final long indexStart;
+  /**
+   * The start time of the enclosing period in milliseconds since the epoch.
+   */
+  public final long periodStartMs;
 
-  public final long indexEnd;
+  /**
+   * The duration of the enclosing period in milliseconds.
+   */
+  public final long periodDurationMs;
 
-  public final long periodStart;
+  /**
+   * The offset of the presentation timestamps in the media stream relative to media time.
+   */
+  public final long presentationTimeOffsetMs;
 
-  public final long periodDuration;
+  private final RangedUri initializationUri;
 
-  public final Uri uri;
+  /**
+   * Constructs a new instance.
+   *
+   * @param periodStartMs The start time of the enclosing period in milliseconds.
+   * @param periodDurationMs The duration of the enclosing period in milliseconds, or -1 if the
+   *     duration is unknown.
+   * @param contentId Identifies the piece of content to which this representation belongs.
+   * @param revisionId Identifies the revision of the content.
+   * @param format The format of the representation.
+   * @param segmentBase A segment base element for the representation.
+   * @return The constructed instance.
+   */
+  public static Representation newInstance(long periodStartMs, long periodDurationMs,
+      String contentId, long revisionId, Format format, SegmentBase segmentBase) {
+    if (segmentBase instanceof SingleSegmentBase) {
+      return new SingleSegmentRepresentation(periodStartMs, periodDurationMs, contentId, revisionId,
+          format, (SingleSegmentBase) segmentBase, -1);
+    } else if (segmentBase instanceof MultiSegmentBase) {
+      return new MultiSegmentRepresentation(periodStartMs, periodDurationMs, contentId, revisionId,
+          format, (MultiSegmentBase) segmentBase);
+    } else {
+      throw new IllegalArgumentException("segmentBase must be of type SingleSegmentBase or "
+          + "MultiSegmentBase");
+    }
+  }
 
-  public Representation(String contentId, long revisionId, Format format, Uri uri,
-      long contentLength, long initializationStart, long initializationEnd, long indexStart,
-      long indexEnd, long periodStart, long periodDuration) {
+  private Representation(long periodStartMs, long periodDurationMs, String contentId,
+      long revisionId, Format format, SegmentBase segmentBase) {
+    this.periodStartMs = periodStartMs;
+    this.periodDurationMs = periodDurationMs;
     this.contentId = contentId;
     this.revisionId = revisionId;
     this.format = format;
-    this.contentLength = contentLength;
-    this.initializationStart = initializationStart;
-    this.initializationEnd = initializationEnd;
-    this.indexStart = indexStart;
-    this.indexEnd = indexEnd;
-    this.periodStart = periodStart;
-    this.periodDuration = periodDuration;
-    this.uri = uri;
+    initializationUri = segmentBase.getInitialization(this);
+    presentationTimeOffsetMs = (segmentBase.presentationTimeOffset * 1000) / segmentBase.timescale;
   }
 
   /**
@@ -87,8 +111,7 @@ public class Representation {
    * @return A {@link RangedUri} defining the location of the initialization data, or null.
    */
   public RangedUri getInitializationUri() {
-    return new RangedUri(uri, null, initializationStart,
-        initializationEnd - initializationStart + 1);
+    return initializationUri;
   }
 
   /**
@@ -97,9 +120,7 @@ public class Representation {
    *
    * @return The location of the segment index, or null.
    */
-  public RangedUri getIndexUri() {
-    return new RangedUri(uri, null, indexStart, indexEnd - indexStart + 1);
-  }
+  public abstract RangedUri getIndexUri();
 
   /**
    * Gets a segment index, if the representation is able to provide one directly. Null if the
@@ -107,9 +128,7 @@ public class Representation {
    *
    * @return The segment index, or null.
    */
-  public DashSegmentIndex getIndex() {
-    return null;
-  }
+  public abstract DashSegmentIndex getIndex();
 
   /**
    * Generates a cache key for the {@link Representation}, in the format
@@ -121,4 +140,143 @@ public class Representation {
     return contentId + "." + format.id + "." + revisionId;
   }
 
+  /**
+   * A DASH representation consisting of a single segment.
+   */
+  public static class SingleSegmentRepresentation extends Representation {
+
+    /**
+     * The {@link Uri} of the single segment.
+     */
+    public final Uri uri;
+
+    /**
+     * The content length, or -1 if unknown.
+     */
+    public final long contentLength;
+
+    private final RangedUri indexUri;
+
+    /**
+     * @param periodStartMs The start time of the enclosing period in milliseconds.
+     * @param periodDurationMs The duration of the enclosing period in milliseconds, or -1 if the
+     *     duration is unknown.
+     * @param contentId Identifies the piece of content to which this representation belongs.
+     * @param revisionId Identifies the revision of the content.
+     * @param format The format of the representation.
+     * @param uri The uri of the media.
+     * @param initializationStart The offset of the first byte of initialization data.
+     * @param initializationEnd The offset of the last byte of initialization data.
+     * @param indexStart The offset of the first byte of index data.
+     * @param indexEnd The offset of the last byte of index data.
+     * @param contentLength The content length, or -1 if unknown.
+     */
+    public static SingleSegmentRepresentation newInstance(long periodStartMs, long periodDurationMs,
+        String contentId, long revisionId, Format format, Uri uri, long initializationStart,
+        long initializationEnd, long indexStart, long indexEnd, long contentLength) {
+      RangedUri rangedUri = new RangedUri(uri, null, initializationStart,
+          initializationEnd - initializationStart + 1);
+      SingleSegmentBase segmentBase = new SingleSegmentBase(rangedUri, 1, 0, uri, indexStart,
+          indexEnd - indexStart + 1);
+      return new SingleSegmentRepresentation(periodStartMs, periodDurationMs, contentId, revisionId,
+          format, segmentBase, contentLength);
+    }
+
+    /**
+     * @param periodStartMs The start time of the enclosing period in milliseconds.
+     * @param periodDurationMs The duration of the enclosing period in milliseconds, or -1 if the
+     *     duration is unknown.
+     * @param contentId Identifies the piece of content to which this representation belongs.
+     * @param revisionId Identifies the revision of the content.
+     * @param format The format of the representation.
+     * @param segmentBase The segment base underlying the representation.
+     * @param contentLength The content length, or -1 if unknown.
+     */
+    public SingleSegmentRepresentation(long periodStartMs, long periodDurationMs, String contentId,
+        long revisionId, Format format, SingleSegmentBase segmentBase, long contentLength) {
+      super(periodStartMs, periodDurationMs, contentId, revisionId, format, segmentBase);
+      this.uri = segmentBase.uri;
+      this.indexUri = segmentBase.getIndex();
+      this.contentLength = contentLength;
+    }
+
+    @Override
+    public RangedUri getIndexUri() {
+      return indexUri;
+    }
+
+    @Override
+    public DashSegmentIndex getIndex() {
+      return null;
+    }
+
+  }
+
+  /**
+   * A DASH representation consisting of multiple segments.
+   */
+  public static class MultiSegmentRepresentation extends Representation
+      implements DashSegmentIndex {
+
+    private final MultiSegmentBase segmentBase;
+
+    /**
+     * @param periodStartMs The start time of the enclosing period in milliseconds.
+     * @param periodDurationMs The duration of the enclosing period in milliseconds, or -1 if the
+     *     duration is unknown.
+     * @param contentId Identifies the piece of content to which this representation belongs.
+     * @param revisionId Identifies the revision of the content.
+     * @param format The format of the representation.
+     * @param segmentBase The segment base underlying the representation.
+     */
+    public MultiSegmentRepresentation(long periodStartMs, long periodDurationMs, String contentId,
+        long revisionId, Format format, MultiSegmentBase segmentBase) {
+      super(periodStartMs, periodDurationMs, contentId, revisionId, format, segmentBase);
+      this.segmentBase = segmentBase;
+    }
+
+    @Override
+    public RangedUri getIndexUri() {
+      return null;
+    }
+
+    @Override
+    public DashSegmentIndex getIndex() {
+      return this;
+    }
+
+    // DashSegmentIndex implementation.
+
+    @Override
+    public RangedUri getSegmentUrl(int segmentIndex) {
+      return segmentBase.getSegmentUrl(this, segmentIndex);
+    }
+
+    @Override
+    public int getSegmentNum(long timeUs) {
+      return segmentBase.getSegmentNum(timeUs);
+    }
+
+    @Override
+    public long getTimeUs(int segmentIndex) {
+      return segmentBase.getSegmentTimeUs(segmentIndex);
+    }
+
+    @Override
+    public long getDurationUs(int segmentIndex) {
+      return segmentBase.getSegmentDurationUs(segmentIndex);
+    }
+
+    @Override
+    public int getFirstSegmentNum() {
+      return segmentBase.getFirstSegmentNum();
+    }
+
+    @Override
+    public int getLastSegmentNum() {
+      return segmentBase.getLastSegmentNum();
+    }
+
+  }
+
 }

library/src/main/java/com/google/android/exoplayer/dash/mpd/Segment.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.dash.mpd;
-
-/**
- * Represents a particular segment in a Representation.
- * 
- */
-public abstract class Segment {
-
-  public final String relativeUri;
-
-  public final long sequenceNumber;
-
-  public final long duration;
-
-  public Segment(String relativeUri, long sequenceNumber, long duration) {
-    this.relativeUri = relativeUri;
-    this.sequenceNumber = sequenceNumber;
-    this.duration = duration;
-  }
-
-  /**
-   * Represents a timeline segment from the MPD's SegmentTimeline list.
-   */
-  public static class Timeline extends Segment {
-
-    public Timeline(long sequenceNumber, long duration) {
-      super(null, sequenceNumber, duration);
-    }
-
-  }
-
-  /**
-   * Represents an initialization segment.
-   */
-  public static class Initialization extends Segment {
-
-    public final long initializationStart;
-    public final long initializationEnd;
-
-    public Initialization(String relativeUri, long initializationStart,
-        long initializationEnd) {
-      super(relativeUri, -1, -1);
-      this.initializationStart = initializationStart;
-      this.initializationEnd = initializationEnd;
-    }
-
-  }
-
-  /**
-   * Represents a media segment.
-   */
-  public static class Media extends Segment {
-
-    public final long mediaStart;
-
-    public Media(String relativeUri, long sequenceNumber, long duration) {
-      this(relativeUri, 0, sequenceNumber, duration);
-    }
-
-    public Media(String uri, long mediaStart, long sequenceNumber, long duration) {
-      super(uri, sequenceNumber, duration);
-      this.mediaStart = mediaStart;
-    }
-
-  }
-}

library/src/main/java/com/google/android/exoplayer/dash/mpd/SegmentedRepresentation.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.dash.mpd;
-
-import com.google.android.exoplayer.chunk.Format;
-import com.google.android.exoplayer.upstream.DataSpec;
-
-import android.net.Uri;
-
-import java.util.List;
-
-/**
- * Represents a DASH Representation which uses the SegmentList structure (i.e. it has a list of
- * Segment URLs instead of a single URL).
- */
-public class SegmentedRepresentation extends Representation {
-
-  private List<Segment> segmentList;
-
-  public SegmentedRepresentation(String contentId, Format format, Uri uri, long initializationStart,
-      long initializationEnd, long indexStart, long indexEnd, long periodStart, long periodDuration,
-      List<Segment> segmentList) {
-    super(contentId, -1, format, uri, DataSpec.LENGTH_UNBOUNDED, initializationStart,
-        initializationEnd, indexStart, indexEnd, periodStart, periodDuration);
-    this.segmentList = segmentList;
-  }
-
-  public int getNumSegments() {
-    return segmentList.size();
-  }
-
-  public Segment getSegment(int i) {
-    return segmentList.get(i);
-  }
-
-}