mjpeg.hpp

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#ifndef ESP32CAM_MJPEG_HPP
#define ESP32CAM_MJPEG_HPP
 
#include "frame.hpp"
 
#include <memory>
 
namespace esp32cam {
 
struct MjpegConfig {
  int minInterval = 0;
 
  int maxFrames = -1;
 
  int frameTimeout = 10000;
};
 
namespace detail {
 
class MjpegController {
public:
  explicit MjpegController(MjpegConfig cfg);
 
  int countSentFrames() const {
    return m_count;
  }
 
  int decideAction();
 
  void notifyCapture();
 
  void notifyReturn(std::unique_ptr<Frame> frame);
 
  Frame* getFrame() const {
    return m_frame.get();
  }
 
  void notifySent(bool ok);
 
  void notifyFail();
 
public:
  enum Action {
    CAPTURE = -1,
    RETURN = -2,
    SEND = -3,
    STOP = -4,
  };
 
  const MjpegConfig cfg;
 
private:
  std::unique_ptr<Frame> m_frame;
  unsigned long m_nextCaptureTime;
  int m_nextAction = CAPTURE;
  int m_count = 0;
};
 
class MjpegHeader {
public:
  void prepareResponseHeaders();
 
  void prepareResponseContentType();
 
  void preparePartHeader(size_t contentLength);
 
  void preparePartTrailer();
 
  size_t writeTo(Print& os);
 
public:
  size_t size = 0;
  char buf[120];
};
 
} // namespace detail
} // namespace esp32cam
 
#endif // ESP32CAM_MJPEG_HPP