text: /*
   * Copyright (c) 2021 Huawei Device Co., Ltd.
   * 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 HOS_HEAP_BUFFER_ALLOCATOR_H
  #define HOS_HEAP_BUFFER_ALLOCATOR_H
  
  #include <memory>
  #include "buffer_allocator.h"
  
  
  namespace OHOS::Camera {
  class HeapBufferAllocator : public BufferAllocator {
  public:
      HeapBufferAllocator();
      virtual ~HeapBufferAllocator();
  
      virtual RetCode Init() override;
  
      virtual std::shared_ptr<IBuffer> AllocBuffer(const uint32_t width,
                                                   const uint32_t height,
                                                   const uint64_t cameraUsage,
                                                   const uint32_t format) override;
      virtual RetCode FreeBuffer(std::shared_ptr<IBuffer>& buffer) override;
      virtual RetCode MapBuffer(std::shared_ptr<IBuffer>&) override;
      virtual RetCode UnmapBuffer(std::shared_ptr<IBuffer>&) override;
      virtual RetCode FlushCache(std::shared_ptr<IBuffer>&) override;
      virtual RetCode InvalidateCache(std::shared_ptr<IBuffer>&) override;
  
  private:
      const int32_t sourceType_ = CAMERA_BUFFER_SOURCE_TYPE_HEAP;
  private:
      uint32_t CalculateSize(const uint32_t width,
                             const uint32_t height,
                             const uint64_t usage,
                             const uint32_t format) const;
  };
  } // namespace OHOS::Camera
  
  #endif
  
  