Deprecate SingleSampleMediaSource.Factory#setTrackId

This method is no longer needed since we added SubtitleConfiguration#id
in https://github.com/google/ExoPlayer/commit/59d98b9a4e2381647f3e4552b6935bcca1be6f89.

Issue: google/ExoPlayer#10016

PiperOrigin-RevId: 432169262
(cherry picked from commit 540f2061)

RELEASENOTES.md

@@ -6,6 +6,12 @@
     *   FMP4: Fix issue where emsg sample metadata could be output in the wrong
     *   FMP4: Fix issue where emsg sample metadata could be output in the wrong
         order for streams containing both v0 and v1 emsg atoms
         order for streams containing both v0 and v1 emsg atoms
         ([#9996](https://github.com/google/ExoPlayer/issues/9996)).
         ([#9996](https://github.com/google/ExoPlayer/issues/9996)).
+*   Text:
+    *   Fix the interaction of `SingleSampleMediaSource.Factory.setTrackId` and
+        `MediaItem.SubtitleConfiguration.Builder.setId` to prioritise the
+        `SubtitleConfiguration` field and fall back to the `Factory` value if
+        it's not set
+        ([#10016](https://github.com/google/ExoPlayer/issues/10016)).
 
 
 ### 2.17.0 (2022-02-24)
 ### 2.17.0 (2022-02-24)
 
 

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

@@ -72,11 +72,12 @@ public final class SingleSampleMediaSource extends BaseMediaSource {
     }
     }
 
 
     /**
     /**
-     * Sets an optional track id to be used.
-     *
-     * @param trackId An optional track id.
-     * @return This factory, for convenience.
+     * @deprecated Use {@link MediaItem.SubtitleConfiguration.Builder#setId(String)} instead (on the
+     *     {@link MediaItem.SubtitleConfiguration} passed to {@link
+     *     #createMediaSource(MediaItem.SubtitleConfiguration, long)}). {@code trackId} will only be
+     *     used if {@link MediaItem.SubtitleConfiguration#id} is {@code null}.
      */
      */
+    @Deprecated
     public Factory setTrackId(@Nullable String trackId) {
     public Factory setTrackId(@Nullable String trackId) {
       this.trackId = trackId;
       this.trackId = trackId;
       return this;
       return this;
@@ -155,29 +156,28 @@ public final class SingleSampleMediaSource extends BaseMediaSource {
     this.durationUs = durationUs;
     this.durationUs = durationUs;
     this.loadErrorHandlingPolicy = loadErrorHandlingPolicy;
     this.loadErrorHandlingPolicy = loadErrorHandlingPolicy;
     this.treatLoadErrorsAsEndOfStream = treatLoadErrorsAsEndOfStream;
     this.treatLoadErrorsAsEndOfStream = treatLoadErrorsAsEndOfStream;
-    mediaItem =
+    this.mediaItem =
         new MediaItem.Builder()
         new MediaItem.Builder()
             .setUri(Uri.EMPTY)
             .setUri(Uri.EMPTY)
             .setMediaId(subtitleConfiguration.uri.toString())
             .setMediaId(subtitleConfiguration.uri.toString())
             .setSubtitleConfigurations(ImmutableList.of(subtitleConfiguration))
             .setSubtitleConfigurations(ImmutableList.of(subtitleConfiguration))
             .setTag(tag)
             .setTag(tag)
             .build();
             .build();
-    format =
+    this.format =
         new Format.Builder()
         new Format.Builder()
-            .setId(trackId)
             .setSampleMimeType(firstNonNull(subtitleConfiguration.mimeType, MimeTypes.TEXT_UNKNOWN))
             .setSampleMimeType(firstNonNull(subtitleConfiguration.mimeType, MimeTypes.TEXT_UNKNOWN))
             .setLanguage(subtitleConfiguration.language)
             .setLanguage(subtitleConfiguration.language)
             .setSelectionFlags(subtitleConfiguration.selectionFlags)
             .setSelectionFlags(subtitleConfiguration.selectionFlags)
             .setRoleFlags(subtitleConfiguration.roleFlags)
             .setRoleFlags(subtitleConfiguration.roleFlags)
             .setLabel(subtitleConfiguration.label)
             .setLabel(subtitleConfiguration.label)
-            .setId(subtitleConfiguration.id)
+            .setId(subtitleConfiguration.id != null ? subtitleConfiguration.id : trackId)
             .build();
             .build();
-    dataSpec =
+    this.dataSpec =
         new DataSpec.Builder()
         new DataSpec.Builder()
             .setUri(subtitleConfiguration.uri)
             .setUri(subtitleConfiguration.uri)
             .setFlags(DataSpec.FLAG_ALLOW_GZIP)
             .setFlags(DataSpec.FLAG_ALLOW_GZIP)
             .build();
             .build();
-    timeline =
+    this.timeline =
         new SinglePeriodTimeline(
         new SinglePeriodTimeline(
             durationUs,
             durationUs,
             /* isSeekable= */ true,
             /* isSeekable= */ true,