Add direct passthrough support for DTS audio.

libraries/common/src/main/java/androidx/media3/common/MimeTypes.java

@@ -595,6 +595,10 @@ public final class MimeTypes {
         return C.ENCODING_DTS;
       case MimeTypes.AUDIO_DTS_HD:
         return C.ENCODING_DTS_HD;
+      case MimeTypes.AUDIO_DTS_EXPRESS:
+        return C.ENCODING_DTS; // This should be ENCODING_DTS_HD when IC platforms support it.
+      case MimeTypes.AUDIO_DTS_X:
+        return C.ENCODING_DTS; // This should be ENCODING_DTS_UHD_P2 when IC platforms support it.
       case MimeTypes.AUDIO_TRUEHD:
         return C.ENCODING_DOLBY_TRUEHD;
       case MimeTypes.AUDIO_OPUS:

libraries/common/src/main/java/androidx/media3/common/util/Util.java

@@ -1884,6 +1884,14 @@ public final class Util {
         return AudioFormat.CHANNEL_OUT_5POINT1 | AudioFormat.CHANNEL_OUT_BACK_CENTER;
       case 8:
         return AudioFormat.CHANNEL_OUT_7POINT1_SURROUND;
+      case 10:
+        if (Util.SDK_INT > 31) {
+          return AudioFormat.CHANNEL_OUT_5POINT1POINT4;
+        } else {
+          // This is used by DTS:X P2 with Direct Passthrough Playback.
+          // Specifying the audio format as 7.1 for 10 channels does not affect the playback.
+          return AudioFormat.CHANNEL_OUT_7POINT1_SURROUND;
+        }
       case 12:
         return AudioFormat.CHANNEL_OUT_7POINT1POINT4;
       default:

libraries/exoplayer/src/main/java/androidx/media3/exoplayer/audio/AudioCapabilities.java

@@ -59,8 +59,9 @@ public final class AudioCapabilities {
   @SuppressWarnings("InlinedApi")
   private static final AudioCapabilities EXTERNAL_SURROUND_SOUND_CAPABILITIES =
       new AudioCapabilities(
-          new int[] {
+          new int[]{
-            AudioFormat.ENCODING_PCM_16BIT, AudioFormat.ENCODING_AC3, AudioFormat.ENCODING_E_AC3
+              AudioFormat.ENCODING_PCM_16BIT, AudioFormat.ENCODING_AC3, AudioFormat.ENCODING_E_AC3,
+              AudioFormat.ENCODING_DTS, AudioFormat.ENCODING_DTS_HD
           },
           DEFAULT_MAX_CHANNEL_COUNT);
 
@@ -220,7 +221,13 @@ public final class AudioCapabilities {
       channelCount = getMaxSupportedChannelCountForPassthrough(encoding, sampleRate);
     } else {
       channelCount = format.channelCount;
-      if (channelCount > maxChannelCount) {
+      if (format.sampleMimeType == MimeTypes.AUDIO_DTS_X) {
+        if (channelCount > 10) {
+          // To fix wrong reporting from device. ChannelCount is reported as 8 for DTS:X P2
+          // on some devices.
+          return null;
+        }
+      } else if (channelCount > maxChannelCount) {
         return null;
       }
     }

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

@@ -41,6 +41,9 @@ public final class DtsUtil {
   private static final int SYNC_VALUE_14B_BE = 0x1FFFE800;
   private static final int SYNC_VALUE_LE = 0xFE7F0180;
   private static final int SYNC_VALUE_14B_LE = 0xFF1F00E8;
+  private static final int SYNC_EXT_SUB_LE = 0x25205864;
+  private static final int SYNC_FTOC_LE = 0xF21B4140;
+  private static final int SYNC_FTOC_NON_SYNC_LE = 0xE842C471;
   private static final byte FIRST_BYTE_BE = (byte) (SYNC_VALUE_BE >>> 24);
   private static final byte FIRST_BYTE_14B_BE = (byte) (SYNC_VALUE_14B_BE >>> 24);
   private static final byte FIRST_BYTE_LE = (byte) (SYNC_VALUE_LE >>> 24);
@@ -149,6 +152,19 @@ public final class DtsUtil {
    * @return The number of audio samples represented by the syncframe.
    */
   public static int parseDtsAudioSampleCount(ByteBuffer buffer) {
+
+    // Check for sync or non sync word for DTS:X Profile 2.
+    // DTS:X Profile 2's FrameSize = 1024.
+    if ((buffer.getInt(0) == SYNC_FTOC_LE) ||
+        (buffer.getInt(0) == SYNC_FTOC_NON_SYNC_LE)) {
+      return 1024;
+    }
+    // Check for sync word for DTS Express.
+    // DTS Express's FrameSize = 4096.
+    else if (buffer.getInt(0) == SYNC_EXT_SUB_LE) {
+      return 4096;
+    }
+
     // See ETSI TS 102 114 subsection 5.4.1.
     int position = buffer.position();
     int nblks;