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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 required to use timestamp of just rendered frame as
// anchor time in paused state.
void updateAnchor(
int64_t anchorTimeMediaUs,
int64_t anchorTimeRealUs,
int64_t maxTimeMediaUs = INT64_MAX);
void updateMaxTimeMedia(int64_t maxTimeMediaUs);
void setPlaybackRate(float rate);
// query media time corresponding to real time |realUs|, and save the
// result in |outMediaUs|.
status_t getMediaTime(int64_t realUs,
int64_t *outMediaUs,
bool allowPastMaxTime = false);
// query real time corresponding to media time |targetMediaUs|.
// The result is saved in |outRealUs|.
status_t getRealTimeFor(int64_t targetMediaUs, int64_t *outRealUs);
protected:
virtual ~MediaClock();
private:
status_t getMediaTime_l(int64_t realUs,
int64_t *outMediaUs,
bool allowPastMaxTime);
Mutex mLock;
int64_t mAnchorTimeMediaUs;
int64_t mAnchorTimeRealUs;
int64_t mMaxTimeMediaUs;
int64_t mStartingTimeMediaUs;
float mPlaybackRate;
DISALLOW_EVIL_CONSTRUCTORS(MediaClock);
};
} // namespace android
#endif // MEDIA_CLOCK_H_
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