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/*
* Copyright (c) 2019, The Linux Foundation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are permitted
* provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice, this list of
* conditions and the following disclaimer in the documentation and/or other materials provided
* with the distribution.
* * Neither the name of The Linux Foundation nor the names of its contributors may be used to
* endorse or promote products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef __FRAME_EXTN_INTF_H__
#define __FRAME_EXTN_INTF_H__
#include <utils/Timers.h>
#include <sys/types.h>
#include <string>
#define EXTENSION_LIBRARY_NAME "libframeextension.so"
#define CREATE_FRAME_EXTN_INTERFACE "CreateFrameExtnInterface"
#define DESTROY_FRAME_EXTN_INTERFACE "DestroyFrameExtnInterface"
namespace composer {
class FrameExtnIntf;
// Function addresses queried at runtime using ::dlsym()
typedef bool (*CreateFrameExtnInterface)(FrameExtnIntf **interface);
typedef bool (*DestroyFrameExtnInterface)(FrameExtnIntf *interface);
/*! @brief This structure defines extension version.
@details It is used to avoid any mismatch of versions between frameextension library
implementation and its clients usage (like SurfaceFlinger).
@sa FrameInfo
*/
struct Version {
uint8_t minor;
uint8_t major;
};
/*! @brief This structure defines the Frame info required by FrameExtnIntf.
@sa FrameExtnIntf::SetFrameInfo
*/
struct FrameInfo {
Version version;
bool transparent_region;
int width;
int height;
int max_queued_frames;
int num_idle;
std::string max_queued_layer_name;
std::string layer_name;
nsecs_t current_timestamp;
nsecs_t previous_timestamp;
nsecs_t vsync_timestamp;
nsecs_t refresh_timestamp;
nsecs_t ref_latency;
nsecs_t vsync_period;
};
/*! @brief This interface shall be implemented by frameextension library.
@details This class declares prototype for frameextension public interfaces which must be
implemented by frameextension library.
*/
class FrameExtnIntf {
public:
/*! @brief Set the FrameInfo used by frameextension.
@details This function is called once per refresh cycle so that required frame info are
feed to frameextension.
@param[in] frameInfo \link FrameInfo \endlink
@return \link int \endlink
*/
virtual int SetFrameInfo(FrameInfo &frameInfo) = 0;
protected:
virtual ~FrameExtnIntf() { };
};
} // namespace composer
#endif // __FRAME_EXTN_INTF_H__
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