Merge pull request #1105 from IanDBird/eac3-fixes

Improve identification of (E)AC3 content in MPEGTS and tweak EAC3 parsing

library/src/main/java/com/google/android/exoplayer/extractor/ts/TsExtractor.java

@@ -392,7 +392,14 @@ public final class TsExtractor implements Extractor {
             streamType = TS_STREAM_TYPE_H265;
           }
           break;
+        } else if (descriptorTag == 0x6a) {
+          streamType = TS_STREAM_TYPE_AC3;
+        } else if (descriptorTag == 0x7a) {
+          streamType = TS_STREAM_TYPE_E_AC3;
+        } else if (descriptorTag == 0x7b) {
+          // TODO: TS_STREAM_TYPE_DTS;
         }
+
         data.skipBytes(descriptorLength);
       }
       data.setPosition(descriptorsEndPosition);

library/src/main/java/com/google/android/exoplayer/util/Ac3Util.java

@@ -152,7 +152,7 @@ public final class Ac3Util {
    */
   public static MediaFormat parseEac3SyncframeFormat(ParsableBitArray data, String trackId,
       long durationUs, String language) {
-    data.skipBits(16 + 2 + 11); // syncword, strmtype, frmsiz
+    data.skipBits(16 + 2 + 3 + 11); // syncword, strmtype, strmid, frmsiz
     int sampleRate;
     int fscod = data.readBits(2);
     if (fscod == 3) {