hyperion.ng/libsrc/leddevice/LedDeviceLightpack-hidapi.h

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#pragma once
// stl includes
#include <vector>
#include <cstdint>
#include <string>
// libusb include
#include <hidapi/hidapi.h>
// Hyperion includes
#include <hyperion/LedDevice.h>
///
/// LedDevice implementation for a lightpack device (http://code.google.com/p/light-pack/)
///
class LedDeviceLightpackHidapi : public LedDevice
{
public:
///
/// Constructs the LedDeviceLightpack
///
LedDeviceLightpackHidapi();
///
/// Destructor of the LedDevice; closes the output device if it is open
///
virtual ~LedDeviceLightpackHidapi();
///
/// Opens and configures the output device
///
/// @return Zero on succes else negative
///
int open(const std::string & serialNumber = "");
///
/// Writes the RGB-Color values to the leds.
///
/// @param[in] ledValues The RGB-color per led
///
/// @return Zero on success else negative
///
virtual int write(const std::vector<ColorRgb>& ledValues);
///
/// Writes the RGB-Color values to the leds.
///
/// @param[in] ledValues Array of RGB values
/// @param[in] size The number of RGB values
///
/// @return Zero on success else negative
///
int write(const ColorRgb * ledValues, int size);
///
/// Switch the leds off
///
/// @return Zero on success else negative
///
virtual int switchOff();
/// Get the serial of the Lightpack
const std::string & getSerialNumber() const;
/// Get the number of leds
int getLedCount() const;
private:
///
/// Test if the device is a (or the) lightpack we are looking for
///
/// @return Zero on succes else negative
///
int testAndOpen(hid_device_info * device, const std::string & requestedSerialNumber);
/// write bytes to the device
int writeBytes(uint8_t *data, int size);
/// Disable the internal smoothing on the Lightpack device
int disableSmoothing();
struct Version
{
int majorVersion;
int minorVersion;
};
private:
/// libusb device handle
hid_device * _deviceHandle;
/// device serial number
std::string _serialNumber;
/// firmware version of the device
Version _firmwareVersion;
/// the number of leds of the device
int _ledCount;
/// the number of bits per channel
int _bitsPerChannel;
/// buffer for led data
std::vector<uint8_t> _ledBuffer;
};