/*
 *  Copyright (C) 2017-2018 Team Kodi
 *  This file is part of Kodi - https://kodi.tv
 *
 *  SPDX-License-Identifier: GPL-2.0-or-later
 *  See LICENSES/README.md for more information.
 */

#pragma once

extern "C" {
#include <libavutil/pixfmt.h>
}

#include <memory>
#include <stdint.h>

namespace KODI
{
namespace RETRO
{
  class CRenderBufferManager;
  class CRenderVideoSettings;
  class CRPBaseRenderer;
  class IRenderBuffer;

  class IRenderBufferPool : public std::enable_shared_from_this<IRenderBufferPool>
  {
  public:
    virtual ~IRenderBufferPool() = default;

    virtual void RegisterRenderer(CRPBaseRenderer *renderer) = 0;
    virtual void UnregisterRenderer(CRPBaseRenderer *renderer) = 0;
    virtual bool HasVisibleRenderer() const = 0;

    virtual bool Configure(AVPixelFormat format) = 0;

    virtual bool IsConfigured() const = 0;

    virtual bool IsCompatible(const CRenderVideoSettings &renderSettings) const = 0;

    /*!
     * \brief Get a free buffer from the pool, sets ref count to 1
     *
     * \param width The horizontal pixel count of the buffer
     * \param height The vertical pixel could of the buffer
     *
     * \return The allocated buffer, or nullptr on failure
     */
    virtual IRenderBuffer *GetBuffer(unsigned int width, unsigned int height) = 0;

    /*!
     * \brief Called by buffer when ref count goes to zero
     *
     * \param buffer A fully dereferenced buffer
     */
    virtual void Return(IRenderBuffer *buffer) = 0;

    virtual void Prime(unsigned int width, unsigned int height) = 0;

    virtual void Flush() = 0;

    /*!
     * \brief Call in GetBuffer() before returning buffer to caller
     */
    virtual std::shared_ptr<IRenderBufferPool> GetPtr() { return shared_from_this(); }
  };
}
}
