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/*
* Copyright (C) 2013 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_ADAPTER_H
#define MEDIA_ADAPTER_H
#include <media/stagefright/foundation/ABase.h>
#include <media/stagefright/MediaSource.h>
#include <media/stagefright/MediaBuffer.h>
#include <media/stagefright/MetaData.h>
#include <utils/threads.h>
namespace android {
// Convert the MediaMuxer's push model into MPEG4Writer's pull model.
// Used only by the MediaMuxer for now.
struct MediaAdapter : public MediaSource, public MediaBufferObserver {
public:
// MetaData is used to set the format and returned at getFormat.
MediaAdapter(const sp<MetaData> &meta);
virtual ~MediaAdapter();
/////////////////////////////////////////////////
// Inherited functions from MediaSource
/////////////////////////////////////////////////
virtual status_t start(MetaData *params = NULL);
virtual status_t stop();
virtual sp<MetaData> getFormat();
virtual status_t read(
MediaBuffer **buffer, const ReadOptions *options = NULL);
/////////////////////////////////////////////////
// Inherited functions from MediaBufferObserver
/////////////////////////////////////////////////
virtual void signalBufferReturned(MediaBuffer *buffer);
/////////////////////////////////////////////////
// Non-inherited functions:
/////////////////////////////////////////////////
// pushBuffer() will wait for the read() finish, and read() will have a
// deep copy, such that after pushBuffer return, the buffer can be re-used.
status_t pushBuffer(MediaBuffer *buffer);
virtual void notifyError(status_t err);
private:
Mutex mAdapterLock;
// Make sure the read() wait for the incoming buffer.
Condition mBufferReadCond;
// Make sure the pushBuffer() wait for the current buffer consumed.
Condition mBufferReturnedCond;
MediaBuffer *mCurrentMediaBuffer;
bool mStarted;
sp<MetaData> mOutputFormat;
status_t mStatus;
DISALLOW_EVIL_CONSTRUCTORS(MediaAdapter);
};
} // namespace android
#endif // MEDIA_ADAPTER_H
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