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/**
* @file bulkcontroller.cpp
* @author Neale Pickett neale@woozle.org
* @date Thu Jun 28 2012
* @brief USB Bulk controller backend
*
*/
#include <libusb.h>
#include "controllers/bulk/bulkcontroller.h"
#include "controllers/bulk/bulksupported.h"
#include "controllers/defs_controllers.h"
#include "controllers/controllerdebug.h"
#include "util/compatibility.h"
#include "util/trace.h"
#include "util/time.h"
BulkReader::BulkReader(libusb_device_handle *handle, unsigned char in_epaddr)
: QThread(),
m_phandle(handle),
m_stop(0),
m_in_epaddr(in_epaddr) {
}
BulkReader::~BulkReader() {
}
void BulkReader::stop() {
m_stop = 1;
}
void BulkReader::run() {
m_stop = 0;
unsigned char data[255];
while (load_atomic(m_stop) == 0) {
// Blocked polling: The only problem with this is that we can't close
// the device until the block is released, which means the controller
// has to send more data
//result = hid_read_timeout(m_pHidDevice, data, 255, -1);
// This relieves that at the cost of higher CPU usage since we only
// block for a short while (500ms)
int transferred;
int result;
result = libusb_bulk_transfer(m_phandle,
m_in_epaddr,
data, sizeof(data),
&transferred, 500);
Trace timeout("BulkReader timeout");
if (result >= 0) {
Trace process("BulkReader process packet");
//qDebug() << "Read" << result << "bytes, pointer:" << data;
QByteArray outData((char*)data, transferred);
emit(incomingData(outData, Time::elapsed()));
}
}
qDebug() << "Stopped Reader";
}
static QString get_string(libusb_device_handle *handle, u_int8_t id) {
unsigned char buf[128] = { 0 };
if (id) {
libusb_get_string_descriptor_ascii(handle, id, buf, sizeof(buf));
}
return QString::fromAscii((char*)buf);
}
BulkController::BulkController(libusb_context* context,
libusb_device_handle *handle,
struct libusb_device_descriptor *desc)
: m_context(context),
m_phandle(handle),
in_epaddr(0),
out_epaddr(0)
{
vendor_id = desc->idVendor;
product_id = desc->idProduct;
manufacturer = get_string(handle, desc->iManufacturer);
product = get_string(handle, desc->iProduct);
m_sUID = get_string(handle, desc->iSerialNumber);
setDeviceCategory(tr("USB Controller"));
setDeviceName(QString("%1 %2").arg(product).arg(m_sUID));
setInputDevice(true);
setOutputDevice(true);
m_pReader = NULL;
}
BulkController::~BulkController() {
if (isOpen()) {
close();
}
}
QString BulkController::presetExtension() {
return BULK_PRESET_EXTENSION;
}
void BulkController::visit(const MidiControllerPreset* preset) {
Q_UNUSED(preset);
// TODO(XXX): throw a hissy fit.
qWarning() << "ERROR: Attempting to load a MidiControllerPreset to an HidController!";
}
void BulkController::visit(const HidControllerPreset* preset) {
m_preset = *preset;
// Emit presetLoaded with a clone of the preset.
emit(presetLoaded(getPreset()));
}
bool BulkController::savePreset(const QString fileName) const {
HidControllerPresetFileHandler handler;
return handler.save(m_preset, getName(), fileName);
}
bool BulkController::matchPreset(const PresetInfo& preset) {
const QList<QHash<QString, QString> > products = preset.getProducts();
QHash <QString, QString> product;
foreach (product, products) {
if (matchProductInfo(product)) {
return true;
}
}
return false;
}
bool BulkController::matchProductInfo(QHash <QString, QString> info) {
int value;
bool ok;
// Product and vendor match is always required
value = info["vendor_id"].toInt(&ok,16);
if (!ok || vendor_id!=value) return false;
value = info["product_id"].toInt(&ok,16);
if (!ok || product_id!=value) return false;
// Match found
return true;
}
int BulkController::open() {
if (isOpen()) {
qDebug() << "USB Bulk device" << getName() << "already open";
return -1;
}
/* Look up endpoint addresses in supported database */
int i;
for (i = 0; bulk_supported[i].vendor_id; ++i) {
if ((bulk_supported[i].vendor_id == vendor_id) &&
(bulk_supported[i].product_id == product_id)) {
in_epaddr = bulk_supported[i].in_epaddr;
out_epaddr = bulk_supported[i].out_epaddr;
break;
}
}
if (bulk_supported[i].vendor_id == 0) {
qWarning() << "USB Bulk device" << getName() << "unsupported";
return -1;
}
// XXX: we should enumerate devices and match vendor, product, and serial
if (m_phandle == NULL) {
m_phandle = libusb_open_device_with_vid_pid(
m_context, vendor_id, product_id);
}
if (m_phandle == NULL) {
qWarning() << "Unable to open USB Bulk device" << getName();
return -1;
}
setOpen(true);
startEngine();
if (m_pReader != NULL) {
qWarning() << "BulkReader already present for" << getName();
} else {
m_pReader = new BulkReader(m_phandle, in_epaddr);
m_pReader->setObjectName(QString("BulkReader %1").arg(getName()));
connect(m_pReader, SIGNAL(incomingData(QByteArray, mixxx::Duration)),
this, SLOT(receive(QByteArray, mixxx::Duration)));
// Controller input needs to be prioritized since it can affect the
// audio directly, like when scratching
m_pReader->start(QThread::HighPriority);
}
return 0;
}
int BulkController::close() {
if (!isOpen()) {
qDebug() << " device" << getName() << "already closed";
return -1;
}
qDebug() << "Shutting down USB Bulk device" << getName();
// Stop the reading thread
if (m_pReader == NULL) {
qWarning() << "BulkReader not present for" << getName()
<< "yet the device is open!";
} else {
disconnect(m_pReader, SIGNAL(incomingData(QByteArray, mixxx::Duration)),
this, SLOT(receive(QByteArray, mixxx::Duration)));
m_pReader->stop();
controllerDebug(" Waiting on reader to finish");
m_pReader->wait();
delete m_pReader;
m_pReader = NULL;
}
// Stop controller engine here to ensure it's done before the device is
// closed incase it has any final parting messages
stopEngine();
// Close device
controllerDebug(" Closing device");
libusb_close(m_phandle);
m_phandle = NULL;
setOpen(false);
return 0;
}
void BulkController::send(QList<int> data, unsigned int length) {
Q_UNUSED(length);
QByteArray temp;
foreach (int datum, data) {
temp.append(datum);
}
send(temp);
}
void BulkController::send(QByteArray data) {
int ret;
int transferred;
// XXX: don't get drunk again.
ret = libusb_bulk_transfer(m_phandle, out_epaddr,
(unsigned char *)data.constData(), data.size(),
&transferred, 0);
if (ret < 0) {
qWarning() << "Unable to send data to" << getName()
<< "serial #" << m_sUID;
} else {
controllerDebug(ret << "bytes sent to" << getName()
<< "serial #" << m_sUID);
}
}
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