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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.
*
* ThreadedUsbReceiver.cpp
* Receive DMX data over USB from a dedicated thread.
* Copyright (C) 2015 Stefan Krupop
*/
#include "plugins/usbdmx/ThreadedUsbReceiver.h"
#include <unistd.h>
#include "ola/Logging.h"
namespace ola {
namespace plugin {
namespace usbdmx {
ThreadedUsbReceiver::ThreadedUsbReceiver(libusb_device *usb_device,
libusb_device_handle *usb_handle,
PluginAdaptor *plugin_adaptor,
int interface_number)
: m_term(false),
m_usb_device(usb_device),
m_usb_handle(usb_handle),
m_interface_number(interface_number),
m_plugin_adaptor(plugin_adaptor),
m_receive_callback(NULL) {
libusb_ref_device(usb_device);
}
ThreadedUsbReceiver::~ThreadedUsbReceiver() {
{
ola::thread::MutexLocker locker(&m_term_mutex);
m_term = true;
}
Join();
libusb_unref_device(m_usb_device);
}
bool ThreadedUsbReceiver::Start() {
bool ret = ola::thread::Thread::Start();
if (!ret) {
OLA_WARN << "Failed to start receiver thread";
libusb_release_interface(m_usb_handle, m_interface_number);
libusb_close(m_usb_handle);
return false;
}
return true;
}
void *ThreadedUsbReceiver::Run() {
DmxBuffer buffer;
buffer.Blackout();
if (!m_usb_handle) {
return NULL;
}
while (1) {
{
ola::thread::MutexLocker locker(&m_term_mutex);
if (m_term) {
break;
}
}
bool buffer_updated = false;
if (!ReceiveBuffer(m_usb_handle, &buffer, &buffer_updated)) {
OLA_WARN << "Receive failed, stopping thread...";
break;
}
if (buffer_updated) {
{
ola::thread::MutexLocker locker(&m_data_mutex);
m_buffer.Set(buffer);
}
if (m_receive_callback.get()) {
m_plugin_adaptor->Execute(m_receive_callback.get());
}
}
}
libusb_release_interface(m_usb_handle, m_interface_number);
libusb_close(m_usb_handle);
return NULL;
}
} // namespace usbdmx
} // namespace plugin
} // namespace ola
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