Make DecoderCountersUtil error message clearer

By including the full counters in the failure message we have a clearer
insight into the cause of the failure.

PiperOrigin-RevId: 415982732

libraries/exoplayer/src/main/java/androidx/media3/exoplayer/DecoderCounters.java

@@ -18,6 +18,7 @@ package androidx.media3.exoplayer;
 import static java.lang.Math.max;
 
 import androidx.media3.common.util.UnstableApi;
+import androidx.media3.common.util.Util;
 
 /**
  * Maintains decoder event counts, for debugging purposes only.
@@ -157,4 +158,34 @@ public final class DecoderCounters {
     totalVideoFrameProcessingOffsetUs += totalProcessingOffsetUs;
     videoFrameProcessingOffsetCount += count;
   }
+
+  @Override
+  public String toString() {
+    return Util.formatInvariant(
+        "DecoderCounters {\n "
+            + "decoderInits=%s,\n "
+            + "decoderReleases=%s\n "
+            + "queuedInputBuffers=%s\n "
+            + "skippedInputBuffers=%s\n "
+            + "renderedOutputBuffers=%s\n "
+            + "skippedOutputBuffers=%s\n "
+            + "droppedBuffers=%s\n "
+            + "droppedInputBuffers=%s\n "
+            + "maxConsecutiveDroppedBuffers=%s\n "
+            + "droppedToKeyframeEvents=%s\n "
+            + "totalVideoFrameProcessingOffsetUs=%s\n "
+            + "videoFrameProcessingOffsetCount=%s\n}",
+        decoderInitCount,
+        decoderReleaseCount,
+        queuedInputBufferCount,
+        skippedInputBufferCount,
+        renderedOutputBufferCount,
+        skippedOutputBufferCount,
+        droppedBufferCount,
+        droppedInputBufferCount,
+        maxConsecutiveDroppedBufferCount,
+        droppedToKeyframeCount,
+        totalVideoFrameProcessingOffsetUs,
+        videoFrameProcessingOffsetCount);
+  }
 }

libraries/test_utils/src/main/java/androidx/media3/test/utils/DecoderCountersUtil.java

@@ -45,7 +45,7 @@ public final class DecoderCountersUtil {
     counters.ensureUpdated();
     int actual = counters.skippedOutputBufferCount;
     assertWithMessage(
-            "Codec(" + name + ") skipped " + actual + " buffers. Expected " + expected + ".")
+            "Codec(%s) skipped an unexpected number of buffers. Counters:\n%s", name, counters)
         .that(actual)
         .isEqualTo(expected);
   }
@@ -68,32 +68,19 @@ public final class DecoderCountersUtil {
   public static void assertTotalBufferCount(
       String name, DecoderCounters counters, int minCount, int maxCount) {
     int actual = getTotalBufferCount(counters);
-    assertWithMessage(
+    assertWithMessage("Codec(%s) output too few buffers. Counters:\n%s", name, counters)
-            "Codec("
+        .that(actual)
-                + name
+        .isAtLeast(minCount);
-                + ") output "
+    assertWithMessage("Codec(%s) output too many buffers. Counters:\n%s", name, counters)
-                + actual
+        .that(actual)
-                + " buffers. Expected in range ["
+        .isAtMost(maxCount);
-                + minCount
-                + ", "
-                + maxCount
-                + "].")
-        .that(minCount <= actual && actual <= maxCount)
-        .isTrue();
   }
 
   public static void assertDroppedBufferLimit(String name, DecoderCounters counters, int limit) {
     counters.ensureUpdated();
     int actual = counters.droppedBufferCount;
     assertWithMessage(
-            "Codec("
+            "Codec(%s) was late decoding too many buffers. Counters:\n%s: ", name, counters)
-                + name
-                + ") was late decoding: "
-                + actual
-                + " buffers. "
-                + "Limit: "
-                + limit
-                + ".")
         .that(actual)
         .isAtMost(limit);
   }
@@ -103,14 +90,8 @@ public final class DecoderCountersUtil {
     counters.ensureUpdated();
     int actual = counters.maxConsecutiveDroppedBufferCount;
     assertWithMessage(
-            "Codec("
+            "Codec(%s) was late decoding too many buffers consecutively. Counters:\n%s",
-                + name
+            name, counters)
-                + ") was late decoding: "
-                + actual
-                + " buffers consecutively. "
-                + "Limit: "
-                + limit
-                + ".")
         .that(actual)
         .isAtMost(limit);
   }
@@ -119,16 +100,14 @@ public final class DecoderCountersUtil {
       String name, DecoderCounters counters, int minCount, int maxCount) {
     int actual = counters.videoFrameProcessingOffsetCount;
     assertWithMessage(
-            "Codec("
+            "Codec(%s) videoFrameProcessingOffsetSampleCount too low. Counters:\n%s",
-                + name
+            name, counters)
-                + ") videoFrameProcessingOffsetSampleCount "
+        .that(actual)
-                + actual
+        .isAtLeast(minCount);
-                + ". Expected in range ["
+    assertWithMessage(
-                + minCount
+            "Codec(%s) videoFrameProcessingOffsetSampleCount too high. Counters:\n%s",
-                + ", "
+            name, counters)
-                + maxCount
+        .that(actual)
-                + "].")
+        .isAtMost(maxCount);
-        .that(minCount <= actual && actual <= maxCount)
-        .isTrue();
   }
 }