Merge pull request #8257 from xufuji456:dev-v2

PiperOrigin-RevId: 344057097

RELEASENOTES.md

@@ -34,6 +34,8 @@
     *   Matroska: Add support for 32-bit floating point PCM, and 8-bit and
         16-bit big endian integer PCM
         ([#8142](https://github.com/google/ExoPlayer/issues/8142)).
+    *   MP4: Add support for mpeg1 video box
+        ([#8257](https://github.com/google/ExoPlayer/issues/8257)).
 *   IMA extension:
     *   Upgrade IMA SDK dependency to 3.21.0, and release the `AdsLoader`
         ([#7344](https://github.com/google/ExoPlayer/issues/7344)).

library/extractor/src/main/java/com/google/android/exoplayer2/extractor/mp4/Atom.java

@@ -278,6 +278,9 @@ import java.util.List;
   public static final int TYPE_TTML = 0x54544d4c;
 
   @SuppressWarnings("ConstantCaseForConstants")
+  public static final int TYPE_m1v_ = 0x6d317620;
+
+  @SuppressWarnings("ConstantCaseForConstants")
   public static final int TYPE_mp4v = 0x6d703476;
 
   @SuppressWarnings("ConstantCaseForConstants")

library/extractor/src/main/java/com/google/android/exoplayer2/extractor/mp4/AtomParsers.java

@@ -853,6 +853,7 @@ import org.checkerframework.checker.nullness.compatqual.NullableType;
       if (childAtomType == Atom.TYPE_avc1
           || childAtomType == Atom.TYPE_avc3
           || childAtomType == Atom.TYPE_encv
+          || childAtomType == Atom.TYPE_m1v_
           || childAtomType == Atom.TYPE_mp4v
           || childAtomType == Atom.TYPE_hvc1
           || childAtomType == Atom.TYPE_hev1
@@ -993,8 +994,12 @@ import org.checkerframework.checker.nullness.compatqual.NullableType;
     //   drmInitData = null;
     // }
 
-    @Nullable List<byte[]> initializationData = null;
     @Nullable String mimeType = null;
+    if (atomType == Atom.TYPE_m1v_) {
+      mimeType = MimeTypes.VIDEO_MPEG;
+    }
+
+    @Nullable List<byte[]> initializationData = null;
     @Nullable String codecs = null;
     @Nullable byte[] projectionData = null;
     @C.StereoMode