composer/QtiComposerHandleImporter.h

/*
 * Copyright (c) 2019, 2021 The Linux Foundation. All rights reserved.
 * Not a Contribution.
 *
 * Copyright (C) 2017 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 __QTICOMPOSERHANDLEIMPORTER_H__
#define __QTICOMPOSERHANDLEIMPORTER_H__

#include <android/hardware/graphics/mapper/4.0/IMapper.h>
#include <utils/Mutex.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>

namespace vendor {
namespace qti {
namespace hardware {
namespace display {
namespace composer {
namespace V3_1 {

#define MAX_INO_VALS 100

using ::android::Mutex;
using ::android::sp;
using ::android::hardware::hidl_handle;
using ::android::hardware::graphics::mapper::V4_0::IMapper;

class ComposerHandleImporter {
 public:
  ComposerHandleImporter();

  // In IComposer, any buffer_handle_t is owned by the caller and we need to
  // make a clone for hwcomposer2.  We also need to translate empty handle
  // to nullptr.  This function does that, in-place.
  bool importBuffer(buffer_handle_t& handle);
  void freeBuffer(buffer_handle_t handle);
  void initialize();
  void cleanup();
  void InoFdMapInsert(int fd);
  void InoFdMapRemove(int fd);

 private:
  Mutex mLock;
  bool mInitialized = false;
  bool enable_memory_mapping_ = false;
  std::map<uint64_t, std::vector<uint32_t>> ino_fds_map_;
  sp<IMapper> mMapper;
};

}  // namespace V3_1
}  // namespace composer
}  // namespace display
}  // namespace hardware
}  // namespace qti
}  // namespace vendor

#endif  // __QTICOMPOSERHANDLEIMPORTER_H__