Add open @IntDef for track types

Also add handling of `C.TRACK_TYPE_IMAGE` in a couple of places where it was
missing.

#exofixit

PiperOrigin-RevId: 395078312

library/common/src/main/java/com/google/android/exoplayer2/C.java

@@ -649,6 +649,29 @@ public final class C {
    */
   public static final int DATA_TYPE_CUSTOM_BASE = 10000;
 
+  /**
+   * Represents a type of media track. May be one of {@link #TRACK_TYPE_UNKNOWN}, {@link
+   * #TRACK_TYPE_DEFAULT}, {@link #TRACK_TYPE_AUDIO}, {@link #TRACK_TYPE_VIDEO}, {@link
+   * #TRACK_TYPE_TEXT}, {@link #TRACK_TYPE_IMAGE}, {@link #TRACK_TYPE_METADATA}, {@link
+   * #TRACK_TYPE_CAMERA_MOTION} or {@link #TRACK_TYPE_NONE}. May also be an app-defined value (see
+   * {@link #TRACK_TYPE_CUSTOM_BASE}).
+   */
+  @Documented
+  @Retention(RetentionPolicy.SOURCE)
+  @IntDef(
+      open = true,
+      value = {
+        TRACK_TYPE_UNKNOWN,
+        TRACK_TYPE_DEFAULT,
+        TRACK_TYPE_AUDIO,
+        TRACK_TYPE_VIDEO,
+        TRACK_TYPE_TEXT,
+        TRACK_TYPE_IMAGE,
+        TRACK_TYPE_METADATA,
+        TRACK_TYPE_CAMERA_MOTION,
+        TRACK_TYPE_NONE,
+      })
+  public @interface TrackType {}
   /** A type constant for tracks of unknown type. */
   public static final int TRACK_TYPE_UNKNOWN = -1;
   /** A type constant for tracks of some default type, where the type itself is unknown. */

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

@@ -1008,7 +1008,7 @@ public final class Format implements Bundleable {
       return this;
     }
 
-    int trackType = MimeTypes.getTrackType(sampleMimeType);
+    @C.TrackType int trackType = MimeTypes.getTrackType(sampleMimeType);
 
     // Use manifest value only.
     @Nullable String id = manifestFormat.id;

library/common/src/main/java/com/google/android/exoplayer2/MediaItem.java

@@ -352,8 +352,8 @@ public final class MediaItem implements Bundleable {
     }
 
     /**
-     * Sets a list of {@link C}{@code .TRACK_TYPE_*} constants for which to use a DRM session even
+     * Sets a list of {@link C.TrackType track types} for which to use a DRM session even when the
-     * when the tracks are in the clear.
+     * tracks are in the clear.
      *
      * <p>For the common case of using a DRM session for {@link C#TRACK_TYPE_VIDEO} and {@link
      * C#TRACK_TYPE_AUDIO} the {@link #setDrmSessionForClearPeriods(boolean)} can be used.

library/common/src/main/java/com/google/android/exoplayer2/util/MimeTypes.java

@@ -486,13 +486,14 @@ public final class MimeTypes {
   }
 
   /**
-   * Returns the {@link C}{@code .TRACK_TYPE_*} constant corresponding to a specified MIME type, or
+   * Returns the {@link C.TrackType track type} constant corresponding to a specified MIME type,
-   * {@link C#TRACK_TYPE_UNKNOWN} if it could not be determined.
+   * which may be {@link C#TRACK_TYPE_UNKNOWN} if it could not be determined.
    *
    * @param mimeType A MIME type.
-   * @return The corresponding {@link C}{@code .TRACK_TYPE_*}, or {@link C#TRACK_TYPE_UNKNOWN} if it
+   * @return The corresponding {@link C.TrackType track type}, which may be {@link
-   *     could not be determined.
+   *     C#TRACK_TYPE_UNKNOWN} if it could not be determined.
    */
+  @C.TrackType
   public static int getTrackType(@Nullable String mimeType) {
     if (TextUtils.isEmpty(mimeType)) {
       return C.TRACK_TYPE_UNKNOWN;
@@ -559,9 +560,10 @@ public final class MimeTypes {
    * Equivalent to {@code getTrackType(getMediaMimeType(codec))}.
    *
    * @param codec An RFC 6381 codec string.
-   * @return The corresponding {@link C}{@code .TRACK_TYPE_*}, or {@link C#TRACK_TYPE_UNKNOWN} if it
+   * @return The corresponding {@link C.TrackType track type}, which may be {@link
-   *     could not be determined.
+   *     C#TRACK_TYPE_UNKNOWN} if it could not be determined.
    */
+  @C.TrackType
   public static int getTrackTypeOfCodec(String codec) {
     return getTrackType(getMediaMimeType(codec));
   }

library/common/src/main/java/com/google/android/exoplayer2/util/Util.java

@@ -1498,7 +1498,7 @@ public final class Util {
   }
 
   /** Returns the number of codec strings in {@code codecs} whose type matches {@code trackType}. */
-  public static int getCodecCountOfType(@Nullable String codecs, int trackType) {
+  public static int getCodecCountOfType(@Nullable String codecs, @C.TrackType int trackType) {
     String[] codecArray = splitCodecs(codecs);
     int count = 0;
     for (String codec : codecArray) {
@@ -2333,27 +2333,29 @@ public final class Util {
   }
 
   /**
-   * Returns a string representation of a {@code TRACK_TYPE_*} constant defined in {@link C}.
+   * Returns a string representation of a {@link C.TrackType}.
    *
-   * @param trackType A {@code TRACK_TYPE_*} constant,
+   * @param trackType A {@link C.TrackType} constant,
    * @return A string representation of this constant.
    */
-  public static String getTrackTypeString(int trackType) {
+  public static String getTrackTypeString(@C.TrackType int trackType) {
     switch (trackType) {
-      case C.TRACK_TYPE_AUDIO:
-        return "audio";
       case C.TRACK_TYPE_DEFAULT:
         return "default";
+      case C.TRACK_TYPE_AUDIO:
+        return "audio";
+      case C.TRACK_TYPE_VIDEO:
+        return "video";
+      case C.TRACK_TYPE_TEXT:
+        return "text";
+      case C.TRACK_TYPE_IMAGE:
+        return "image";
       case C.TRACK_TYPE_METADATA:
         return "metadata";
       case C.TRACK_TYPE_CAMERA_MOTION:
         return "camera motion";
       case C.TRACK_TYPE_NONE:
         return "none";
-      case C.TRACK_TYPE_TEXT:
-        return "text";
-      case C.TRACK_TYPE_VIDEO:
-        return "video";
       default:
         return trackType >= C.TRACK_TYPE_CUSTOM_BASE ? "custom (" + trackType + ")" : "?";
     }

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

@@ -84,6 +84,9 @@ public class DefaultLoadControl implements LoadControl {
   /** A default size in bytes for a camera motion buffer. */
   public static final int DEFAULT_CAMERA_MOTION_BUFFER_SIZE = 2 * C.DEFAULT_BUFFER_SEGMENT_SIZE;
 
+  /** A default size in bytes for an image buffer. */
+  public static final int DEFAULT_IMAGE_BUFFER_SIZE = 2 * C.DEFAULT_BUFFER_SEGMENT_SIZE;
+
   /** A default size in bytes for a muxed buffer (e.g. containing video, audio and text). */
   public static final int DEFAULT_MUXED_BUFFER_SIZE =
       DEFAULT_VIDEO_BUFFER_SIZE + DEFAULT_AUDIO_BUFFER_SIZE + DEFAULT_TEXT_BUFFER_SIZE;
@@ -421,7 +424,7 @@ public class DefaultLoadControl implements LoadControl {
     }
   }
 
-  private static int getDefaultBufferSize(int trackType) {
+  private static int getDefaultBufferSize(@C.TrackType int trackType) {
     switch (trackType) {
       case C.TRACK_TYPE_DEFAULT:
         return DEFAULT_MUXED_BUFFER_SIZE;
@@ -435,8 +438,11 @@ public class DefaultLoadControl implements LoadControl {
         return DEFAULT_METADATA_BUFFER_SIZE;
       case C.TRACK_TYPE_CAMERA_MOTION:
         return DEFAULT_CAMERA_MOTION_BUFFER_SIZE;
+      case C.TRACK_TYPE_IMAGE:
+        return DEFAULT_IMAGE_BUFFER_SIZE;
       case C.TRACK_TYPE_NONE:
         return 0;
+      case C.TRACK_TYPE_UNKNOWN:
       default:
         throw new IllegalArgumentException();
     }

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

@@ -208,8 +208,9 @@ public interface Renderer extends PlayerMessage.Target {
    * Returns the track type that the renderer handles.
    *
    * @see ExoPlayer#getRendererType(int)
-   * @return One of the {@code TRACK_TYPE_*} constants defined in {@link C}.
+   * @return The {@link C.TrackType track type}.
    */
+  @C.TrackType
   int getTrackType();
 
   /**

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

@@ -1837,7 +1837,8 @@ public class SimpleExoPlayer extends BasePlayer
     }
   }
 
-  private void sendRendererMessage(int trackType, int messageType, @Nullable Object payload) {
+  private void sendRendererMessage(
+      @C.TrackType int trackType, int messageType, @Nullable Object payload) {
     for (Renderer renderer : renderers) {
       if (renderer.getTrackType() == trackType) {
         player.createMessage(renderer).setType(messageType).setPayload(payload).send();

library/core/src/main/java/com/google/android/exoplayer2/mediacodec/AsynchronousMediaCodecAdapter.java

@@ -73,7 +73,7 @@ import java.nio.ByteBuffer;
      *     {@link MediaCodec}.
      */
     public Factory(
-        int trackType,
+        @C.TrackType int trackType,
         boolean forceQueueingSynchronizationWorkaround,
         boolean synchronizeCodecInteractionsWithQueueing) {
       this(
@@ -331,15 +331,15 @@ import java.nio.ByteBuffer;
     }
   }
 
-  private static String createCallbackThreadLabel(int trackType) {
+  private static String createCallbackThreadLabel(@C.TrackType int trackType) {
     return createThreadLabel(trackType, /* prefix= */ "ExoPlayer:MediaCodecAsyncAdapter:");
   }
 
-  private static String createQueueingThreadLabel(int trackType) {
+  private static String createQueueingThreadLabel(@C.TrackType int trackType) {
     return createThreadLabel(trackType, /* prefix= */ "ExoPlayer:MediaCodecQueueingThread:");
   }
 
-  private static String createThreadLabel(int trackType, String prefix) {
+  private static String createThreadLabel(@C.TrackType int trackType, String prefix) {
     StringBuilder labelBuilder = new StringBuilder(prefix);
     if (trackType == C.TRACK_TYPE_AUDIO) {
       labelBuilder.append("Audio");

library/core/src/main/java/com/google/android/exoplayer2/mediacodec/MediaCodecRenderer.java

@@ -360,8 +360,7 @@ public abstract class MediaCodecRenderer extends BaseRenderer {
   private int pendingOutputStreamOffsetCount;
 
   /**
-   * @param trackType The track type that the renderer handles. One of the {@code C.TRACK_TYPE_*}
+   * @param trackType The {@link C.TrackType track type} that the renderer handles.
-   *     constants defined in {@link C}.
    * @param mediaCodecSelector A decoder selector.
    * @param enableDecoderFallback Whether to enable fallback to lower-priority decoders if decoder
    *     initialization fails. This may result in using a decoder that is less efficient or slower
@@ -371,7 +370,7 @@ public abstract class MediaCodecRenderer extends BaseRenderer {
    *     explicitly using {@link MediaFormat#KEY_OPERATING_RATE}).
    */
   public MediaCodecRenderer(
-      int trackType,
+      @C.TrackType int trackType,
       MediaCodecAdapter.Factory codecAdapterFactory,
       MediaCodecSelector mediaCodecSelector,
       boolean enableDecoderFallback,

library/core/src/main/java/com/google/android/exoplayer2/source/MediaLoadData.java

@@ -18,6 +18,7 @@ package com.google.android.exoplayer2.source;
 import androidx.annotation.Nullable;
 import com.google.android.exoplayer2.C;
 import com.google.android.exoplayer2.C.DataType;
+import com.google.android.exoplayer2.C.TrackType;
 import com.google.android.exoplayer2.Format;
 
 /** Descriptor for data being loaded or selected by a {@link MediaSource}. */
@@ -26,10 +27,10 @@ public final class MediaLoadData {
   /** The {@link DataType data type}. */
   @DataType public final int dataType;
   /**
-   * One of the {@link C} {@code TRACK_TYPE_*} constants if the data corresponds to media of a
+   * One of the {@link TrackType track type}, which is a media track type if the data corresponds to
-   * specific type. {@link C#TRACK_TYPE_UNKNOWN} otherwise.
+   * media of a specific type, or {@link C#TRACK_TYPE_UNKNOWN} otherwise.
    */
-  public final int trackType;
+  @TrackType public final int trackType;
   /**
    * The format of the track to which the data belongs. Null if the data does not belong to a
    * specific track.

library/core/src/main/java/com/google/android/exoplayer2/source/chunk/ChunkSampleStream.java

@@ -69,7 +69,7 @@ public class ChunkSampleStream<T extends ChunkSource>
 
   private static final String TAG = "ChunkSampleStream";
 
-  public final int primaryTrackType;
+  @C.TrackType public final int primaryTrackType;
 
   private final int[] embeddedTrackTypes;
   private final Format[] embeddedTrackFormats;
@@ -99,8 +99,7 @@ public class ChunkSampleStream<T extends ChunkSource>
   /**
    * Constructs an instance.
    *
-   * @param primaryTrackType The type of the primary track. One of the {@link C} {@code
+   * @param primaryTrackType The {@link C.TrackType type} of the primary track.
-   *     TRACK_TYPE_*} constants.
    * @param embeddedTrackTypes The types of any embedded tracks, or null.
    * @param embeddedTrackFormats The formats of the embedded tracks, or null.
    * @param chunkSource A {@link ChunkSource} from which chunks to load are obtained.
@@ -115,7 +114,7 @@ public class ChunkSampleStream<T extends ChunkSource>
    *     events.
    */
   public ChunkSampleStream(
-      int primaryTrackType,
+      @C.TrackType int primaryTrackType,
       @Nullable int[] embeddedTrackTypes,
       @Nullable Format[] embeddedTrackFormats,
       T chunkSource,

library/core/src/main/java/com/google/android/exoplayer2/source/mediaparser/OutputConsumerAdapterV30.java

@@ -429,6 +429,7 @@ public final class OutputConsumerAdapterV30 implements MediaParser.OutputConsume
     tracksEnded = true;
   }
 
+  @C.TrackType
   private static int toTrackTypeConstant(@Nullable String string) {
     if (string == null) {
       return C.TRACK_TYPE_UNKNOWN;

library/dash/src/main/java/com/google/android/exoplayer2/source/dash/DashMediaPeriod.java

@@ -921,7 +921,7 @@ import org.checkerframework.checker.nullness.compatqual.NullableType;
     private static final int CATEGORY_MANIFEST_EVENTS = 2;
 
     public final int[] adaptationSetIndices;
-    public final int trackType;
+    @C.TrackType public final int trackType;
     @TrackGroupCategory public final int trackGroupCategory;
 
     public final int eventStreamGroupIndex;
@@ -981,7 +981,7 @@ import org.checkerframework.checker.nullness.compatqual.NullableType;
     }
 
     private TrackGroupInfo(
-        int trackType,
+        @C.TrackType int trackType,
         @TrackGroupCategory int trackGroupCategory,
         int[] adaptationSetIndices,
         int primaryTrackGroupIndex,

library/dash/src/main/java/com/google/android/exoplayer2/source/dash/manifest/AdaptationSet.java

@@ -15,6 +15,7 @@
  */
 package com.google.android.exoplayer2.source.dash.manifest;
 
+import com.google.android.exoplayer2.C;
 import java.util.Collections;
 import java.util.List;
 
@@ -30,11 +31,8 @@ public class AdaptationSet {
    */
   public final int id;
 
-  /**
+  /** The {@link C.TrackType track type} of the adaptation set. */
-   * The type of the adaptation set. One of the {@link com.google.android.exoplayer2.C} {@code
+  @C.TrackType public final int type;
-   * TRACK_TYPE_*} constants.
-   */
-  public final int type;
 
   /** {@link Representation}s in the adaptation set. */
   public final List<Representation> representations;
@@ -51,8 +49,7 @@ public class AdaptationSet {
   /**
    * @param id A non-negative identifier for the adaptation set that's unique in the scope of its
    *     containing period, or {@link #ID_UNSET} if not specified.
-   * @param type The type of the adaptation set. One of the {@link com.google.android.exoplayer2.C}
+   * @param type The {@link C.TrackType track type} of the adaptation set.
-   *     {@code TRACK_TYPE_*} constants.
    * @param representations {@link Representation}s in the adaptation set.
    * @param accessibilityDescriptors Accessibility descriptors in the adaptation set.
    * @param essentialProperties Essential properties in the adaptation set.
@@ -60,7 +57,7 @@ public class AdaptationSet {
    */
   public AdaptationSet(
       int id,
-      int type,
+      @C.TrackType int type,
       List<Representation> representations,
       List<Descriptor> accessibilityDescriptors,
       List<Descriptor> essentialProperties,

library/dash/src/main/java/com/google/android/exoplayer2/source/dash/manifest/DashManifestParser.java

@@ -376,7 +376,7 @@ public class DashManifestParser extends DefaultHandler
       long timeShiftBufferDepthMs)
       throws XmlPullParserException, IOException {
     int id = parseInt(xpp, "id", AdaptationSet.ID_UNSET);
-    int contentType = parseContentType(xpp);
+    @C.TrackType int contentType = parseContentType(xpp);
 
     String mimeType = xpp.getAttributeValue(null, "mimeType");
     String codecs = xpp.getAttributeValue(null, "codecs");
@@ -514,7 +514,7 @@ public class DashManifestParser extends DefaultHandler
 
   protected AdaptationSet buildAdaptationSet(
       int id,
-      int contentType,
+      @C.TrackType int contentType,
       List<Representation> representations,
       List<Descriptor> accessibilityDescriptors,
       List<Descriptor> essentialProperties,
@@ -528,6 +528,7 @@ public class DashManifestParser extends DefaultHandler
         supplementalProperties);
   }
 
+  @C.TrackType
   protected int parseContentType(XmlPullParser xpp) {
     String contentType = xpp.getAttributeValue(null, "contentType");
     return TextUtils.isEmpty(contentType)
@@ -1676,7 +1677,8 @@ public class DashManifestParser extends DefaultHandler
    * @param secondType The second type.
    * @return The consistent type.
    */
-  private static int checkContentTypeConsistency(int firstType, int secondType) {
+  private static int checkContentTypeConsistency(
+      @C.TrackType int firstType, @C.TrackType int secondType) {
     if (firstType == C.TRACK_TYPE_UNKNOWN) {
       return secondType;
     } else if (secondType == C.TRACK_TYPE_UNKNOWN) {

library/extractor/src/main/java/com/google/android/exoplayer2/extractor/ExtractorOutput.java

@@ -15,6 +15,8 @@
  */
 package com.google.android.exoplayer2.extractor;
 
+import com.google.android.exoplayer2.C;
+
 /** Receives stream level data extracted by an {@link Extractor}. */
 public interface ExtractorOutput {
 
@@ -48,11 +50,10 @@ public interface ExtractorOutput {
    * id}.
    *
    * @param id A track identifier.
-   * @param type The type of the track. Typically one of the {@link com.google.android.exoplayer2.C}
+   * @param type The {@link C.TrackType track type}.
-   *     {@code TRACK_TYPE_*} constants.
    * @return The {@link TrackOutput} for the given track identifier.
    */
-  TrackOutput track(int id, int type);
+  TrackOutput track(int id, @C.TrackType int type);
 
   /**
    * Called when all tracks have been identified, meaning no new {@code trackId} values will be

library/extractor/src/main/java/com/google/android/exoplayer2/extractor/mp4/AtomParsers.java

@@ -866,6 +866,7 @@ import org.checkerframework.checker.nullness.compatqual.NullableType;
   }
 
   /** Returns the track type for a given handler value. */
+  @C.TrackType
   private static int getTrackTypeForHdlr(int hdlr) {
     if (hdlr == TYPE_soun) {
       return C.TRACK_TYPE_AUDIO;

library/extractor/src/main/java/com/google/android/exoplayer2/extractor/mp4/Track.java

@@ -45,7 +45,7 @@ public final class Track {
   /**
    * One of {@link C#TRACK_TYPE_AUDIO}, {@link C#TRACK_TYPE_VIDEO} and {@link C#TRACK_TYPE_TEXT}.
    */
-  public final int type;
+  @C.TrackType public final int type;
 
   /** The track timescale, defined as the number of time units that pass in one second. */
   public final long timescale;
@@ -81,7 +81,7 @@ public final class Track {
 
   public Track(
       int id,
-      int type,
+      @C.TrackType int type,
       long timescale,
       long movieTimescale,
       long durationUs,

library/hls/src/main/java/com/google/android/exoplayer2/source/hls/HlsMediaPeriod.java

@@ -628,6 +628,7 @@ public final class HlsMediaPeriod
         numberOfAudioCodecs <= 1
             && numberOfVideoCodecs <= 1
             && numberOfAudioCodecs + numberOfVideoCodecs > 0;
+    @C.TrackType
     int trackType =
         !useVideoVariantsOnly && numberOfAudioCodecs > 0
             ? C.TRACK_TYPE_AUDIO
@@ -754,7 +755,7 @@ public final class HlsMediaPeriod
   }
 
   private HlsSampleStreamWrapper buildSampleStreamWrapper(
-      int trackType,
+      @C.TrackType int trackType,
       Uri[] playlistUrls,
       Format[] playlistFormats,
       @Nullable Format muxedAudioFormat,

library/hls/src/main/java/com/google/android/exoplayer2/source/hls/HlsSampleStreamWrapper.java

@@ -125,7 +125,7 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
           new HashSet<>(
               Arrays.asList(C.TRACK_TYPE_AUDIO, C.TRACK_TYPE_VIDEO, C.TRACK_TYPE_METADATA)));
 
-  private final int trackType;
+  @C.TrackType private final int trackType;
   private final Callback callback;
   private final HlsChunkSource chunkSource;
   private final Allocator allocator;
@@ -135,7 +135,7 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
   private final LoadErrorHandlingPolicy loadErrorHandlingPolicy;
   private final Loader loader;
   private final MediaSourceEventListener.EventDispatcher mediaSourceEventDispatcher;
-  private final @HlsMediaSource.MetadataType int metadataType;
+  @HlsMediaSource.MetadataType private final int metadataType;
   private final HlsChunkSource.HlsChunkHolder nextChunkHolder;
   private final ArrayList<HlsMediaChunk> mediaChunks;
   private final List<HlsMediaChunk> readOnlyMediaChunks;
@@ -185,7 +185,7 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
   @Nullable private HlsMediaChunk sourceChunk;
 
   /**
-   * @param trackType The type of the track. One of the {@link C} {@code TRACK_TYPE_*} constants.
+   * @param trackType The {@link C.TrackType track type}.
    * @param callback A callback for the wrapper.
    * @param chunkSource A {@link HlsChunkSource} from which chunks to load are obtained.
    * @param overridingDrmInitData Overriding {@link DrmInitData}, keyed by protection scheme type
@@ -203,7 +203,7 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
    *     events.
    */
   public HlsSampleStreamWrapper(
-      int trackType,
+      @C.TrackType int trackType,
       Callback callback,
       HlsChunkSource chunkSource,
       Map<String, DrmInitData> overridingDrmInitData,

library/smoothstreaming/src/main/java/com/google/android/exoplayer2/source/smoothstreaming/manifest/SsManifest.java

@@ -60,7 +60,7 @@ public class SsManifest implements FilterableManifest<SsManifest> {
     private static final String URL_PLACEHOLDER_BITRATE_1 = "{bitrate}";
     private static final String URL_PLACEHOLDER_BITRATE_2 = "{Bitrate}";
 
-    public final int type;
+    @C.TrackType public final int type;
     public final String subType;
     public final long timescale;
     public final String name;
@@ -82,7 +82,7 @@ public class SsManifest implements FilterableManifest<SsManifest> {
     public StreamElement(
         String baseUri,
         String chunkTemplate,
-        int type,
+        @C.TrackType int type,
         String subType,
         long timescale,
         String name,
@@ -115,7 +115,7 @@ public class SsManifest implements FilterableManifest<SsManifest> {
     private StreamElement(
         String baseUri,
         String chunkTemplate,
-        int type,
+        @C.TrackType int type,
         String subType,
         long timescale,
         String name,

library/smoothstreaming/src/test/java/com/google/android/exoplayer2/source/smoothstreaming/SsTestUtils.java

@@ -59,7 +59,8 @@ public class SsTestUtils {
   }
 
   /** Creates test video stream element with the given name, track type and formats. */
-  public static StreamElement createStreamElement(String name, int trackType, Format... formats) {
+  public static StreamElement createStreamElement(
+      String name, @C.TrackType int trackType, Format... formats) {
     return new StreamElement(
         TEST_BASE_URI,
         TEST_CHUNK_TEMPLATE,

testutils/src/main/java/com/google/android/exoplayer2/testutil/DefaultRenderersFactoryAsserts.java

@@ -23,6 +23,7 @@ import static com.google.common.truth.Truth.assertThat;
 import android.os.Handler;
 import android.os.Looper;
 import androidx.test.core.app.ApplicationProvider;
+import com.google.android.exoplayer2.C;
 import com.google.android.exoplayer2.DefaultRenderersFactory;
 import com.google.android.exoplayer2.Renderer;
 import com.google.android.exoplayer2.audio.AudioRendererEventListener;
@@ -45,7 +46,8 @@ public final class DefaultRenderersFactoryAsserts {
    * @param clazz The extension renderer class.
    * @param type The type of the renderer.
    */
-  public static void assertExtensionRendererCreated(Class<? extends Renderer> clazz, int type) {
+  public static void assertExtensionRendererCreated(
+      Class<? extends Renderer> clazz, @C.TrackType int type) {
     // In EXTENSION_RENDERER_MODE_OFF the renderer should not be created.
     Renderer[] renderers = createRenderers(EXTENSION_RENDERER_MODE_OFF);
     for (Renderer renderer : renderers) {

testutils/src/main/java/com/google/android/exoplayer2/testutil/FakeRenderer.java

@@ -62,7 +62,7 @@ public class FakeRenderer extends BaseRenderer {
   public int positionResetCount;
   public int sampleBufferReadCount;
 
-  public FakeRenderer(int trackType) {
+  public FakeRenderer(@C.TrackType int trackType) {
     super(trackType);
     buffer = new DecoderInputBuffer(DecoderInputBuffer.BUFFER_REPLACEMENT_MODE_NORMAL);
     lastSamplePositionUs = Long.MIN_VALUE;