display_manager_base.h

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//
// Copyright (c) 2025, Astute Systems PTY LTD
//
// This file is part of the VivoeX project developed by Astute Systems.
//
// Licensed under the Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)
// License. See the LICENSE file in the project root for full license details.
//
 
#ifndef HARDWARE_DISPLAY_MANAGER_BASE_H_
#define HARDWARE_DISPLAY_MANAGER_BASE_H_
 
#include <errno.h>
#include <fcntl.h>
#include <linux/fb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
 
#include <string>
#include <vector>
 
#include "common/datatypes.h"
#include "rtp/rtp_types.h"
 
namespace mediax {
 
class DisplayManagerBase {
 public:
  DisplayManagerBase(std::string name = "") : name_(name){};
 
  virtual ~DisplayManagerBase() = default;
 
  virtual Status Initalise() = 0;
 
  virtual void Run() = 0;
 
  virtual void Stop() {}
 
  virtual Resolution GetResolution() = 0;
 
  void SetResolution(Resolution resolution) { last_requested_resolution_ = resolution; }
 
  std::string GetName() { return name_; }
 
  virtual int GetBytesPerPixel() = 0;
 
  virtual mediax::rtp::ColourspaceType GetColourspace() { return mediax::rtp::ColourspaceType::kColourspaceUndefined; }
 
  virtual Status DisplayBuffer(uint8_t *frame_buffer, Resolution resolution, std::string text) = 0;
 
  Status Rescale(uint8_t *frame_buffer, void *display_buffer, Resolution resolution, int height, int width);
 
  virtual void Flush() = 0;
 
  virtual void ToggleFullscreen() {}
 
  Resolution last_requested_resolution_ = {0, 0, 0};
  std::vector<uint8_t> scaled_frame_buffer_;
  std::string name_;
};
 
}  // namespace mediax
 
#endif  // HARDWARE_DISPLAY_MANAGER_BASE_H_