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/*
* Copyright (C) 2009 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 MEDIA_BUFFER_GROUP_H_
#define MEDIA_BUFFER_GROUP_H_
#include <media/stagefright/MediaBuffer.h>
#include <utils/Errors.h>
#include <utils/threads.h>
namespace android {
class MediaBuffer;
class MetaData;
class MediaBufferGroup : public MediaBufferObserver {
public:
MediaBufferGroup();
~MediaBufferGroup();
void add_buffer(MediaBuffer *buffer);
// If nonBlocking is false, it blocks until a buffer is available and
// passes it to the caller in *buffer, while returning OK.
// The returned buffer will have a reference count of 1.
// If nonBlocking is true and a buffer is not immediately available,
// buffer is set to NULL and it returns WOULD_BLOCK.
status_t acquire_buffer(MediaBuffer **buffer, bool nonBlocking = false);
protected:
virtual void signalBufferReturned(MediaBuffer *buffer);
private:
friend class MediaBuffer;
Mutex mLock;
Condition mCondition;
MediaBuffer *mFirstBuffer, *mLastBuffer;
MediaBufferGroup(const MediaBufferGroup &);
MediaBufferGroup &operator=(const MediaBufferGroup &);
};
} // namespace android
#endif // MEDIA_BUFFER_GROUP_H_
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