Make parallel adaptive track selection more robust.

Using parallel adaptation for Formats without bitrate information currently
causes an exception. Handle this gracefully and also cases where all formats
have the same bitrate.

Issue:#5971
PiperOrigin-RevId: 250682127

RELEASENOTES.md

@@ -47,6 +47,9 @@
   ([#5834](https://github.com/google/ExoPlayer/issues/5834)).
 * Allow enabling decoder fallback with `DefaultRenderersFactory`
   ([#5942](https://github.com/google/ExoPlayer/issues/5942)).
+* Fix bug caused by parallel adaptive track selection using `Format`s without
+  bitrate information
+  ([#5971](https://github.com/google/ExoPlayer/issues/5971)).
 
 ### 2.10.1 ###
 

library/core/src/main/java/com/google/android/exoplayer2/trackselection/AdaptiveTrackSelection.java

@@ -758,7 +758,7 @@ private static double[][] getLogArrayValues(long[][] values) {
     for (int i = 0; i < values.length; i++) {
       logValues[i] = new double[values[i].length];
       for (int j = 0; j < values[i].length; j++) {
-        logValues[i][j] = Math.log(values[i][j]);
+        logValues[i][j] = values[i][j] == Format.NO_VALUE ? 0 : Math.log(values[i][j]);
       }
     }
     return logValues;
@@ -780,7 +780,8 @@ private static double[][] getSwitchPoints(double[][] logBitrates) {
       double totalBitrateDiff = logBitrates[i][logBitrates[i].length - 1] - logBitrates[i][0];
       for (int j = 0; j < logBitrates[i].length - 1; j++) {
         double switchBitrate = 0.5 * (logBitrates[i][j] + logBitrates[i][j + 1]);
-        switchPoints[i][j] = (switchBitrate - logBitrates[i][0]) / totalBitrateDiff;
+        switchPoints[i][j] =
+            totalBitrateDiff == 0.0 ? 1.0 : (switchBitrate - logBitrates[i][0]) / totalBitrateDiff;
       }
     }
     return switchPoints;