extensions/browser/api/webcam_private/v4l2_webcam.h

// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef EXTENSIONS_BROWSER_API_WEBCAM_PRIVATE_V4L2_WEBCAM_H_
#define EXTENSIONS_BROWSER_API_WEBCAM_PRIVATE_V4L2_WEBCAM_H_

#include "extensions/browser/api/webcam_private/webcam.h"

#include <stdint.h>

#include "base/files/scoped_file.h"
#include "base/macros.h"

namespace extensions {

class V4L2Webcam : public Webcam {
 public:
  V4L2Webcam(const std::string& device_id);
  bool Open();

 private:
  ~V4L2Webcam() override;
  bool EnsureLogitechCommandsMapped();
  bool SetWebcamParameter(int fd, uint32_t control_id, int value);
  bool GetWebcamParameter(int fd, uint32_t control_id, int* value);

  // Webcam:
  void GetPan(const GetPTZCompleteCallback& callback) override;
  void GetTilt(const GetPTZCompleteCallback& callback) override;
  void GetZoom(const GetPTZCompleteCallback& callback) override;
  void SetPan(int value,
              int pan_speed,
              const SetPTZCompleteCallback& callback) override;
  void SetTilt(int value,
               int tilt_speed,
               const SetPTZCompleteCallback& callback) override;
  void SetZoom(int value, const SetPTZCompleteCallback& callback) override;
  void SetPanDirection(PanDirection direction,
                       int pan_speed,
                       const SetPTZCompleteCallback& callback) override;
  void SetTiltDirection(TiltDirection direction,
                        int tilt_speed,
                        const SetPTZCompleteCallback& callback) override;
  void Reset(bool pan,
             bool tilt,
             bool zoom,
             const SetPTZCompleteCallback& callback) override;

  const std::string device_id_;
  base::ScopedFD fd_;

  DISALLOW_COPY_AND_ASSIGN(V4L2Webcam);
};


}  // namespace extensions

#endif  // EXTENSIONS_BROWSER_API_WEBCAM_PRIVATE_V4L2_WEBCAM_H_