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/*
* Copyright 2017, 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_DATASOURCECALLBACK_H_
#define _ANDROID_MEDIA_DATASOURCECALLBACK_H_
#include "jni.h"
#include <media/DataSource.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.DataSourceCallback. It inherits from
// DataSource.
//
// 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 JDataSourceCallback : public DataSource {
public:
JDataSourceCallback(JNIEnv *env, jobject source);
virtual ~JDataSourceCallback();
virtual status_t initCheck() const override;
virtual ssize_t readAt(off64_t offset, void *data, size_t size) override;
virtual status_t getSize(off64_t *size) override;
virtual String8 toString() override;
virtual String8 getMIMEType() const override;
virtual void close() override;
private:
// Protect all member variables with mLock because this object will be
// accessed on different 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;
jobject mDataSourceCallbackObj;
jmethodID mReadAtMethod;
jmethodID mGetSizeMethod;
jmethodID mCloseMethod;
jbyteArray mByteArrayObj;
DISALLOW_EVIL_CONSTRUCTORS(JDataSourceCallback);
};
} // namespace android
#endif // _ANDROID_MEDIA_DATASOURCECALLBACK_H_