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/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Library General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* ThreadedUsbSender.cpp
* Send DMX data over USB from a dedicated thread.
* Copyright (C) 2014 Simon Newton
*/
#include "plugins/usbdmx/ThreadedUsbSender.h"
#include <unistd.h>
#include "ola/Logging.h"
namespace ola {
namespace plugin {
namespace usbdmx {
ThreadedUsbSender::ThreadedUsbSender(libusb_device *usb_device,
libusb_device_handle *usb_handle,
int interface_number)
: m_term(false),
m_usb_device(usb_device),
m_usb_handle(usb_handle),
m_interface_number(interface_number) {
libusb_ref_device(usb_device);
}
ThreadedUsbSender::~ThreadedUsbSender() {
{
ola::thread::MutexLocker locker(&m_term_mutex);
m_term = true;
}
Join();
libusb_unref_device(m_usb_device);
}
bool ThreadedUsbSender::Start() {
bool ret = ola::thread::Thread::Start();
if (!ret) {
OLA_WARN << "Failed to start sender thread";
libusb_release_interface(m_usb_handle, m_interface_number);
libusb_close(m_usb_handle);
return false;
}
return true;
}
void *ThreadedUsbSender::Run() {
DmxBuffer buffer;
if (!m_usb_handle)
return NULL;
while (1) {
{
ola::thread::MutexLocker locker(&m_term_mutex);
if (m_term)
break;
}
{
ola::thread::MutexLocker locker(&m_data_mutex);
buffer.Set(m_buffer);
}
if (buffer.Size()) {
if (!TransmitBuffer(m_usb_handle, buffer)) {
OLA_WARN << "Send failed, stopping thread...";
break;
}
} else {
// sleep for a bit
usleep(40000);
}
}
libusb_release_interface(m_usb_handle, m_interface_number);
libusb_close(m_usb_handle);
return NULL;
}
bool ThreadedUsbSender::SendDMX(const DmxBuffer &buffer) {
// Store the new data in the shared buffer.
ola::thread::MutexLocker locker(&m_data_mutex);
m_buffer.Set(buffer);
return true;
}
} // namespace usbdmx
} // namespace plugin
} // namespace ola
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