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+/*
+ * Copyright 2015, 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.
+ */
+
+#ifndef _ANDROID_MEDIA_MEDIADATASOURCE_H_
+#define _ANDROID_MEDIA_MEDIADATASOURCE_H_
+
+#include "jni.h"
+
+#include <media/IDataSource.h>
+#include <media/stagefright/foundation/ABase.h>
+#include <utils/Errors.h>
+#include <utils/Mutex.h>
+
+namespace android {
+
+// The native counterpart to a Java android.media.MediaDataSource. It inherits from
+// IDataSource so that it can be accessed remotely.
+//
+// If the java DataSource returns an error or throws an exception it
+// will be considered to be in a broken state, and the only further call this
+// will make is to close().
+class JMediaDataSource : public BnDataSource {
+public:
+ enum {
+ kBufferSize = 64 * 1024,
+ };
+
+ JMediaDataSource(JNIEnv *env, jobject source);
+ virtual ~JMediaDataSource();
+
+ virtual sp<IMemory> getIMemory();
+ virtual ssize_t readAt(off64_t offset, size_t size);
+ virtual status_t getSize(off64_t* size);
+ virtual void close();
+
+private:
+ // Protect all member variables with mLock because this object will be
+ // accessed on different binder worker threads.
+ Mutex mLock;
+
+ // The status of the java DataSource. Set to OK unless an error occurred or
+ // close() was called.
+ status_t mJavaObjStatus;
+ // Only call the java getSize() once so the app can't change the size on us.
+ bool mSizeIsCached;
+ off64_t mCachedSize;
+ sp<IMemory> mMemory;
+
+ jobject mMediaDataSourceObj;
+ jmethodID mReadMethod;
+ jmethodID mGetSizeMethod;
+ jmethodID mCloseMethod;
+ jbyteArray mByteArrayObj;
+
+ DISALLOW_EVIL_CONSTRUCTORS(JMediaDataSource);
+};
+
+} // namespace android
+
+#endif // _ANDROID_MEDIA_MEDIADATASOURCE_H_