diff --git a/media/jni/android_media_MediaCodec.cpp b/media/jni/android_media_MediaCodec.cpp
index fc9b91c76a4f7..a31f177d66ab5 100644
--- a/media/jni/android_media_MediaCodec.cpp
+++ b/media/jni/android_media_MediaCodec.cpp
@@ -676,8 +676,6 @@ status_t JMediaCodec::getOutputFrame(
     if (buffer->size() > 0) {
         std::shared_ptr<C2Buffer> c2Buffer = buffer->asC2Buffer();
         if (c2Buffer) {
-            // asC2Buffer clears internal reference, so set the reference again.
-            buffer->copy(c2Buffer);
             switch (c2Buffer->data().type()) {
                 case C2BufferData::LINEAR: {
                     std::unique_ptr<JMediaCodecLinearBlock> context{new JMediaCodecLinearBlock};
@@ -2526,7 +2524,7 @@ static void android_media_MediaCodec_setAudioPresentation(
     codec->selectAudioPresentation((int32_t)presentationId, (int32_t)programId);
 }
 
-static void android_media_MediaCodec_native_init(JNIEnv *env) {
+static void android_media_MediaCodec_native_init(JNIEnv *env, jclass) {
     ScopedLocalRef<jclass> clazz(
             env, env->FindClass("android/media/MediaCodec"));
     CHECK(clazz.get() != NULL);
@@ -2983,7 +2981,7 @@ static void android_media_MediaCodec_LinearBlock_native_obtain(
 }
 
 static jboolean android_media_MediaCodec_LinearBlock_checkCompatible(
-        JNIEnv *env, jobjectArray codecNames) {
+        JNIEnv *env, jclass, jobjectArray codecNames) {
     std::vector<std::string> names;
     PopulateNamesVector(env, codecNames, &names);
     bool isCompatible = false;