83 lines
2.6 KiB
C++
83 lines
2.6 KiB
C++
/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Library General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* VellemanOutputPort.h
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* The output port for a Velleman 8062 device.
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* Copyright (C) 2010 Simon Newton
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*
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* Because this interface is so slow we run the output in a separate thread. It
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* takes around 8ms to respond to an urb and in the worst case we send 74 urbs
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* per universe.
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*
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* It would be interesting to see if you can pipeline the urbs to improve the
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* performance.
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*/
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#ifndef PLUGINS_USBDMX_VELLEMANOUTPUTPORT_H_
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#define PLUGINS_USBDMX_VELLEMANOUTPUTPORT_H_
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#include <libusb.h>
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#include <pthread.h>
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#include <string>
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#include "ola/DmxBuffer.h"
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#include "ola/OlaThread.h"
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#include "olad/Port.h"
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namespace ola {
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namespace plugin {
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namespace usbdmx {
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class VellemanDevice;
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class VellemanOutputPort: public BasicOutputPort, OlaThread {
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public:
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VellemanOutputPort(VellemanDevice *parent,
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unsigned int id,
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libusb_device *usb_device);
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~VellemanOutputPort();
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bool Start();
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void *Run();
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bool WriteDMX(const DmxBuffer &buffer, uint8_t priority);
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string Description() const { return ""; }
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private:
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enum {VELLEMAN_USB_CHUNK_SIZE = 8};
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enum {COMPRESSED_CHANNEL_COUNT = 6};
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enum {CHANNEL_COUNT = 7};
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// this could be up to 254 but then the shutdown process gets wacky.
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static const uint8_t MAX_COMPRESSED_CHANNELS = 100;
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static const unsigned char ENDPOINT = 0x01;
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// 25ms seems to be about the shortest we can go
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static const unsigned int URB_TIMEOUT_MS = 25;
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static const int CONFIGURATION = 1;
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bool m_term;
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libusb_device *m_usb_device;
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libusb_device_handle *m_usb_handle;
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DmxBuffer m_buffer;
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pthread_mutex_t m_data_mutex;
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pthread_mutex_t m_term_mutex;
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bool SendDMX(const DmxBuffer &buffer_old);
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bool SendDataChunk(uint8_t *usb_data);
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};
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} // usbdmx
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} // plugin
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} // ola
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#endif // PLUGINS_USBDMX_VELLEMANOUTPUTPORT_H_
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