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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.
*
* AsyncUsbSender.cpp
* An Asynchronous DMX USB sender.
* Copyright (C) 2014 Simon Newton
*/
#include "plugins/usbdmx/AsyncUsbSender.h"
#include "libs/usb/LibUsbAdaptor.h"
#include "ola/Logging.h"
namespace ola {
namespace plugin {
namespace usbdmx {
using ola::usb::LibUsbAdaptor;
AsyncUsbSender::AsyncUsbSender(LibUsbAdaptor *adaptor,
libusb_device *usb_device)
: AsyncUsbTransceiverBase(adaptor, usb_device),
m_pending_tx(false) {
}
AsyncUsbSender::~AsyncUsbSender() {
m_adaptor->Close(m_usb_handle);
}
bool AsyncUsbSender::SendDMX(const DmxBuffer &buffer) {
if (!m_usb_handle) {
OLA_WARN << "AsyncUsbSender hasn't been initialized";
return false;
}
ola::thread::MutexLocker locker(&m_mutex);
if (m_transfer_state == IDLE) {
PerformTransfer(buffer);
} else {
// Buffer incoming data so we can send it when the outstanding transfers
// complete.
m_pending_tx = true;
m_tx_buffer.Set(buffer);
}
return true;
}
void AsyncUsbSender::TransferComplete(struct libusb_transfer *transfer) {
if (transfer != m_transfer) {
OLA_WARN << "Mismatched libusb transfer: " << transfer << " != "
<< m_transfer;
return;
}
if (transfer->status != LIBUSB_TRANSFER_COMPLETED) {
OLA_WARN << "Transfer returned " << transfer->status;
}
ola::thread::MutexLocker locker(&m_mutex);
m_transfer_state = (transfer->status == LIBUSB_TRANSFER_NO_DEVICE ?
DISCONNECTED : IDLE);
if (m_suppress_continuation) {
return;
}
PostTransferHook();
if ((m_transfer_state == IDLE) && m_pending_tx) {
m_pending_tx = false;
PerformTransfer(m_tx_buffer);
}
}
} // namespace usbdmx
} // namespace plugin
} // namespace ola
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