Add open @IntDef for track selection reasons.

#exofixit

PiperOrigin-RevId: 395217458

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

@@ -696,6 +696,24 @@ public final class C {
    */
   public static final int TRACK_TYPE_CUSTOM_BASE = 10000;
 
+  /**
+   * Represents a reason for selection. May be one of {@link #SELECTION_REASON_UNKNOWN}, {@link
+   * #SELECTION_REASON_INITIAL}, {@link #SELECTION_REASON_MANUAL}, {@link
+   * #SELECTION_REASON_ADAPTIVE} or {@link #SELECTION_REASON_TRICK_PLAY}. May also be an app-defined
+   * value (see {@link #SELECTION_REASON_CUSTOM_BASE}).
+   */
+  @Documented
+  @Retention(RetentionPolicy.SOURCE)
+  @IntDef(
+      open = true,
+      value = {
+        SELECTION_REASON_UNKNOWN,
+        SELECTION_REASON_INITIAL,
+        SELECTION_REASON_MANUAL,
+        SELECTION_REASON_ADAPTIVE,
+        SELECTION_REASON_TRICK_PLAY
+      })
+  public @interface SelectionReason {}
   /** A selection reason constant for selections whose reasons are unknown or unspecified. */
   public static final int SELECTION_REASON_UNKNOWN = 0;
   /** A selection reason constant for an initial track selection. */

library/core/src/main/java/com/google/android/exoplayer2/offline/DownloadHelper.java

@@ -1096,6 +1096,7 @@ public final class DownloadHelper {
     }
 
     @Override
+    @C.SelectionReason
     public int getSelectionReason() {
       return C.SELECTION_REASON_UNKNOWN;
     }

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.SelectionReason;
 import com.google.android.exoplayer2.C.TrackType;
 import com.google.android.exoplayer2.Format;
 
@@ -37,8 +38,8 @@ public final class MediaLoadData {
    */
   @Nullable public final Format trackFormat;
   /**
-   * One of the {@link C} {@code SELECTION_REASON_*} constants if the data belongs to a track.
+   * One of the {@link SelectionReason selection reasons} if the data belongs to a track. {@link
-   * {@link C#SELECTION_REASON_UNKNOWN} otherwise.
+   * C#SELECTION_REASON_UNKNOWN} otherwise.
    */
   public final int trackSelectionReason;
   /**
@@ -82,9 +83,9 @@ public final class MediaLoadData {
    */
   public MediaLoadData(
       @DataType int dataType,
-      int trackType,
+      @TrackType int trackType,
       @Nullable Format trackFormat,
-      int trackSelectionReason,
+      @SelectionReason int trackSelectionReason,
       @Nullable Object trackSelectionData,
       long mediaStartTimeMs,
       long mediaEndTimeMs) {

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

@@ -229,9 +229,9 @@ public interface MediaSourceEventListener {
     public void loadStarted(
         LoadEventInfo loadEventInfo,
         @DataType int dataType,
-        int trackType,
+        @C.TrackType int trackType,
         @Nullable Format trackFormat,
-        int trackSelectionReason,
+        @C.SelectionReason int trackSelectionReason,
         @Nullable Object trackSelectionData,
         long mediaStartTimeUs,
         long mediaEndTimeUs) {
@@ -274,9 +274,9 @@ public interface MediaSourceEventListener {
     public void loadCompleted(
         LoadEventInfo loadEventInfo,
         @DataType int dataType,
-        int trackType,
+        @C.TrackType int trackType,
         @Nullable Format trackFormat,
-        int trackSelectionReason,
+        @C.SelectionReason int trackSelectionReason,
         @Nullable Object trackSelectionData,
         long mediaStartTimeUs,
         long mediaEndTimeUs) {
@@ -320,9 +320,9 @@ public interface MediaSourceEventListener {
     public void loadCanceled(
         LoadEventInfo loadEventInfo,
         @DataType int dataType,
-        int trackType,
+        @C.TrackType int trackType,
         @Nullable Format trackFormat,
-        int trackSelectionReason,
+        @C.SelectionReason int trackSelectionReason,
         @Nullable Object trackSelectionData,
         long mediaStartTimeUs,
         long mediaEndTimeUs) {
@@ -378,9 +378,9 @@ public interface MediaSourceEventListener {
     public void loadError(
         LoadEventInfo loadEventInfo,
         @DataType int dataType,
-        int trackType,
+        @C.TrackType int trackType,
         @Nullable Format trackFormat,
-        int trackSelectionReason,
+        @C.SelectionReason int trackSelectionReason,
         @Nullable Object trackSelectionData,
         long mediaStartTimeUs,
         long mediaEndTimeUs,
@@ -445,9 +445,9 @@ public interface MediaSourceEventListener {
 
     /** Dispatches {@link #onDownstreamFormatChanged(int, MediaPeriodId, MediaLoadData)}. */
     public void downstreamFormatChanged(
-        int trackType,
+        @C.TrackType int trackType,
         @Nullable Format trackFormat,
-        int trackSelectionReason,
+        @C.SelectionReason int trackSelectionReason,
         @Nullable Object trackSelectionData,
         long mediaTimeUs) {
       downstreamFormatChanged(

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

@@ -58,7 +58,7 @@ public abstract class BaseMediaChunk extends MediaChunk {
       DataSource dataSource,
       DataSpec dataSpec,
       Format trackFormat,
-      int trackSelectionReason,
+      @C.SelectionReason int trackSelectionReason,
       @Nullable Object trackSelectionData,
       long startTimeUs,
       long endTimeUs,

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

@@ -44,11 +44,11 @@ public abstract class Chunk implements Loadable {
   /** The format of the track to which this chunk belongs. */
   public final Format trackFormat;
   /**
-   * One of the {@link C} {@code SELECTION_REASON_*} constants if the chunk belongs to a track.
+   * One of the {@link C.SelectionReason selection reasons} if the chunk belongs to a track. {@link
-   * {@link C#SELECTION_REASON_UNKNOWN} if the chunk does not belong to a track, or if the selection
+   * C#SELECTION_REASON_UNKNOWN} if the chunk does not belong to a track, or if the selection reason
-   * reason is unknown.
+   * is unknown.
    */
-  public final int trackSelectionReason;
+  @C.SelectionReason public final int trackSelectionReason;
   /**
    * Optional data associated with the selection of the track to which this chunk belongs. Null if
    * the chunk does not belong to a track, or if there is no associated track selection data.
@@ -82,7 +82,7 @@ public abstract class Chunk implements Loadable {
       DataSpec dataSpec,
       @DataType int type,
       Format trackFormat,
-      int trackSelectionReason,
+      @C.SelectionReason int trackSelectionReason,
       @Nullable Object trackSelectionData,
       long startTimeUs,
       long endTimeUs) {

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

@@ -61,7 +61,7 @@ public class ContainerMediaChunk extends BaseMediaChunk {
       DataSource dataSource,
       DataSpec dataSpec,
       Format trackFormat,
-      int trackSelectionReason,
+      @C.SelectionReason int trackSelectionReason,
       @Nullable Object trackSelectionData,
       long startTimeUs,
       long endTimeUs,

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

@@ -51,7 +51,7 @@ public abstract class DataChunk extends Chunk {
       DataSpec dataSpec,
       @DataType int type,
       Format trackFormat,
-      int trackSelectionReason,
+      @C.SelectionReason int trackSelectionReason,
       @Nullable Object trackSelectionData,
       @Nullable byte[] data) {
     super(

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

@@ -51,7 +51,7 @@ public final class InitializationChunk extends Chunk {
       DataSource dataSource,
       DataSpec dataSpec,
       Format trackFormat,
-      int trackSelectionReason,
+      @C.SelectionReason int trackSelectionReason,
       @Nullable Object trackSelectionData,
       ChunkExtractor chunkExtractor) {
     super(

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

@@ -42,7 +42,7 @@ public abstract class MediaChunk extends Chunk {
       DataSource dataSource,
       DataSpec dataSpec,
       Format trackFormat,
-      int trackSelectionReason,
+      @C.SelectionReason int trackSelectionReason,
       @Nullable Object trackSelectionData,
       long startTimeUs,
       long endTimeUs,

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

@@ -52,7 +52,7 @@ public final class SingleSampleMediaChunk extends BaseMediaChunk {
       DataSource dataSource,
       DataSpec dataSpec,
       Format trackFormat,
-      int trackSelectionReason,
+      @C.SelectionReason int trackSelectionReason,
       @Nullable Object trackSelectionData,
       long startTimeUs,
       long endTimeUs,

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

@@ -609,7 +609,7 @@ public class DefaultDashChunkSource implements DashChunkSource {
       RepresentationHolder representationHolder,
       DataSource dataSource,
       Format trackFormat,
-      int trackSelectionReason,
+      @C.SelectionReason int trackSelectionReason,
       Object trackSelectionData,
       @Nullable RangedUri initializationUri,
       RangedUri indexUri) {
@@ -644,9 +644,9 @@ public class DefaultDashChunkSource implements DashChunkSource {
   protected Chunk newMediaChunk(
       RepresentationHolder representationHolder,
       DataSource dataSource,
-      int trackType,
+      @C.TrackType int trackType,
       Format trackFormat,
-      int trackSelectionReason,
+      @C.SelectionReason int trackSelectionReason,
       Object trackSelectionData,
       long firstSegmentNum,
       int maxSegmentCount,

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

@@ -875,7 +875,7 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
         DataSource dataSource,
         DataSpec dataSpec,
         Format trackFormat,
-        int trackSelectionReason,
+        @C.SelectionReason int trackSelectionReason,
         @Nullable Object trackSelectionData,
         byte[] scratchSpace) {
       super(

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

@@ -84,7 +84,7 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
       HlsChunkSource.SegmentBaseHolder segmentBaseHolder,
       Uri playlistUrl,
       @Nullable List<Format> muxedCaptionFormats,
-      int trackSelectionReason,
+      @C.SelectionReason int trackSelectionReason,
       @Nullable Object trackSelectionData,
       boolean isMasterTimestampSource,
       TimestampAdjusterProvider timestampAdjusterProvider,
@@ -280,7 +280,7 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
       boolean initSegmentEncrypted,
       Uri playlistUrl,
       @Nullable List<Format> muxedCaptionFormats,
-      int trackSelectionReason,
+      @C.SelectionReason int trackSelectionReason,
       @Nullable Object trackSelectionData,
       long startTimeUs,
       long endTimeUs,

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

@@ -318,7 +318,7 @@ public class DefaultSsChunkSource implements SsChunkSource {
       long chunkStartTimeUs,
       long chunkEndTimeUs,
       long chunkSeekTimeUs,
-      int trackSelectionReason,
+      @C.SelectionReason int trackSelectionReason,
       @Nullable Object trackSelectionData,
       ChunkExtractor chunkExtractor) {
     DataSpec dataSpec = new DataSpec(uri);

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

@@ -46,9 +46,13 @@ public final class FakeMediaChunk extends MediaChunk {
    * @param trackFormat The {@link Format}.
    * @param startTimeUs The start time of the media, in microseconds.
    * @param endTimeUs The end time of the media, in microseconds.
-   * @param selectionReason The reason for selecting this format.
+   * @param selectionReason One of the {@link C.SelectionReason selection reasons}.
    */
-  public FakeMediaChunk(Format trackFormat, long startTimeUs, long endTimeUs, int selectionReason) {
+  public FakeMediaChunk(
+      Format trackFormat,
+      long startTimeUs,
+      long endTimeUs,
+      @C.SelectionReason int selectionReason) {
     super(
         DATA_SOURCE,
         new DataSpec(Uri.EMPTY),