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/*
* Copyright 2012, 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 SERIALIZER_H_
#define SERIALIZER_H_
#include <media/stagefright/foundation/AHandler.h>
#include <utils/Vector.h>
namespace android {
struct AMessage;
struct MediaSource;
// After adding a number of MediaSource objects and starting the Serializer,
// it'll emit their access units in order of increasing timestamps.
struct Serializer : public AHandler {
enum {
kWhatEOS,
kWhatAccessUnit
};
// In throttled operation, data is emitted at a pace corresponding
// to the incoming media timestamps.
Serializer(bool throttle, const sp<AMessage> ¬ify);
ssize_t addSource(const sp<MediaSource> &source);
status_t start();
status_t stop();
protected:
virtual void onMessageReceived(const sp<AMessage> &what);
virtual ~Serializer();
private:
enum {
kWhatAddSource,
kWhatStart,
kWhatStop,
kWhatPoll
};
struct Track;
bool mThrottle;
sp<AMessage> mNotify;
Vector<sp<Track> > mTracks;
int32_t mPollGeneration;
int64_t mStartTimeUs;
status_t postSynchronouslyAndReturnError(const sp<AMessage> &msg);
ssize_t onAddSource(const sp<AMessage> &msg);
status_t onStart();
status_t onStop();
int64_t onPoll();
void schedulePoll(int64_t delayUs = 0ll);
void cancelPoll();
DISALLOW_EVIL_CONSTRUCTORS(Serializer);
};
} // namespace android
#endif // SERIALIZER_H_
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