Fix 14-bit DTS frame size calculation

libraries/extractor/src/main/java/androidx/media3/extractor/DtsUtil.java

@@ -408,8 +408,14 @@ public static int getDtsFrameSize(byte[] data) {
         fsize = (((data[5] & 0x03) << 12) | ((data[6] & 0xFF) << 4) | ((data[7] & 0xF0) >> 4)) + 1;
     }
 
-    // If the frame is stored in 14-bit mode, adjust the frame size to reflect the actual byte size.
-    return uses14BitPerWord ? fsize * 16 / 14 : fsize;
+    if (!uses14BitPerWord) {
+      return fsize;
+    }
+    // A 14-bit stream stores each 14-bit word in a 16-bit container. Convert the unpacked byte size
+    // to a whole number of 14-bit words before converting those words to physical bytes. For
+    // example, DTS-CD frames with FSIZE+1 equal to 3585 have their next sync word after 2048 stored
+    // words, or 4096 bytes.
+    return (fsize * C.BITS_PER_BYTE / 14) * 2;
   }
 
   /**

libraries/extractor/src/test/java/androidx/media3/extractor/DtsUtilTest.java

@@ -0,0 +1,54 @@
+/*
+ * Copyright 2026 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package androidx.media3.extractor;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import androidx.media3.common.util.Util;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+/** Unit tests for {@link DtsUtil}. */
+@RunWith(AndroidJUnit4.class)
+public final class DtsUtilTest {
+
+  private static final int DTS_CD_FRAME_SIZE = 4_096;
+  private static final byte[] DTS_CD_14_BIT_LITTLE_ENDIAN_HEADER =
+      Util.getBytesFromHexString("FF1F00E8F107E0FC980000FAEAF40900DEFB");
+  private static final byte[] DTS_CD_14_BIT_BIG_ENDIAN_HEADER =
+      Util.getBytesFromHexString("1FFFE80007F1FCE0009800FAF4EA0009FBDE");
+  private static final byte[] DTS_14_BIT_HEADER_WITH_EXACT_WORD_CONVERSION =
+      Util.getBytesFromHexString("FF1F00E8F107DFFC983C00FAEAF40900DEFB");
+
+  @Test
+  public void getDtsFrameSize_wordAligned14BitLittleEndian_returnsPhysicalFrameSize() {
+    assertThat(DtsUtil.getDtsFrameSize(DTS_CD_14_BIT_LITTLE_ENDIAN_HEADER))
+        .isEqualTo(DTS_CD_FRAME_SIZE);
+  }
+
+  @Test
+  public void getDtsFrameSize_wordAligned14BitBigEndian_returnsPhysicalFrameSize() {
+    assertThat(DtsUtil.getDtsFrameSize(DTS_CD_14_BIT_BIG_ENDIAN_HEADER))
+        .isEqualTo(DTS_CD_FRAME_SIZE);
+  }
+
+  @Test
+  public void getDtsFrameSize_exact14BitWordConversion_returnsUnchangedFrameSize() {
+    assertThat(DtsUtil.getDtsFrameSize(DTS_14_BIT_HEADER_WITH_EXACT_WORD_CONVERSION))
+        .isEqualTo(DTS_CD_FRAME_SIZE);
+  }
+}