WebCameraInput.hpp

#pragma once
#include <Media/Libav.hpp>
 
#if defined(__EMSCRIPTEN__) && SCORE_HAS_LIBAV
#include <Video/ExternalInput.hpp>
#include <Video/FrameQueue.hpp>
 
#include <score_plugin_media_export.h>
 
#include <string>
#include <vector>
 
namespace Video
{
struct WebCameraDevice
{
  std::string id;
  std::string label;
};
 
SCORE_PLUGIN_MEDIA_EXPORT void webCameraScan() noexcept;
 
SCORE_PLUGIN_MEDIA_EXPORT int webCameraScanGeneration() noexcept;
 
SCORE_PLUGIN_MEDIA_EXPORT std::vector<WebCameraDevice> webCameraDevices() noexcept;
 
class SCORE_PLUGIN_MEDIA_EXPORT WebCameraInput final : public ExternalInput
{
public:
  WebCameraInput() noexcept;
  ~WebCameraInput() noexcept override;
 
  bool load(const std::string& deviceId, int w, int h, double fps) noexcept;
 
  bool start() noexcept override;
  void stop() noexcept override;
 
  AVFrame* dequeue_frame() noexcept override;
  void release_frame(AVFrame* frame) noexcept override;
 
private:
  void fetch() noexcept;
 
  FrameQueue m_frames;
  std::string m_deviceId;
  int m_requestedWidth{};
  int m_requestedHeight{};
  double m_requestedFps{};
  int m_handle{};
  bool m_reportedError{};
};
}
#endif