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/*
* Copyright (C) 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 MEDIA_CLOCK_H_
#define MEDIA_CLOCK_H_
#include <media/stagefright/foundation/ABase.h>
#include <utils/Mutex.h>
#include <utils/RefBase.h>
namespace android {
struct AMessage;
struct MediaClock : public RefBase {
MediaClock();
void setStartingTimeMedia(int64_t startingTimeMediaUs);
void clearAnchor();
// It's highly recommended to use timestamp of just rendered frame as
// anchor time, especially in paused state. Such restriction will be
// required when dynamic playback rate is supported in the future.
void updateAnchor(
int64_t anchorTimeMediaUs,
int64_t anchorTimeRealUs,
int64_t maxTimeMediaUs = INT64_MAX);
void updateMaxTimeMedia(int64_t maxTimeMediaUs);
void pause();
void resume();
int64_t getTimeMedia(int64_t realUs, bool allowPastMaxTime = false);
protected:
virtual ~MediaClock();
private:
Mutex mLock;
int64_t mAnchorTimeMediaUs;
int64_t mAnchorTimeRealUs;
int64_t mMaxTimeMediaUs;
int64_t mStartingTimeMediaUs;
bool mPaused;
DISALLOW_EVIL_CONSTRUCTORS(MediaClock);
};
} // namespace android
#endif // MEDIA_CLOCK_H_
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