#ifndef UI_GL_SYNC_CONTROL_VSYNC_PROVIDER_H_
#define UI_GL_SYNC_CONTROL_VSYNC_PROVIDER_H_
#include <queue>
#include "ui/gfx/vsync_provider.h"
namespace gfx {
class SyncControlVSyncProvider : public VSyncProvider {
public:
SyncControlVSyncProvider();
virtual ~SyncControlVSyncProvider();
virtual void GetVSyncParameters(const UpdateVSyncCallback& callback) OVERRIDE;
protected:
virtual bool GetSyncValues(int64* system_time,
int64* media_stream_counter,
int64* swap_buffer_counter) = 0;
virtual bool GetMscRate(int32* numerator, int32* denominator) = 0;
private:
base::TimeTicks last_timebase_;
uint64 last_media_stream_counter_;
base::TimeDelta last_good_interval_;
bool invalid_msc_;
std::queue<base::TimeDelta> last_computed_intervals_;
DISALLOW_COPY_AND_ASSIGN(SyncControlVSyncProvider);
};
}
#endif