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#include <QtEndian>
#include "liveview.h"
using namespace sowatch;
QTM_USE_NAMESPACE
#define PROTOCOL_DEBUG 1
LiveView::LiveView(ConfigKey* settings, QObject* parent) :
BluetoothWatch(QBluetoothAddress(settings->value("address").toString()), parent),
_settings(settings->getSubkey(QString(), this)),
_sendTimer(new QTimer(this))
{
_sendTimer->setInterval(DelayBetweenMessages);
connect(_sendTimer, SIGNAL(timeout()), SLOT(handleSendTimerTick()));
}
LiveView::~LiveView()
{
}
QPaintEngine* LiveView::paintEngine() const
{
return 0; // TODO
}
int LiveView::metric(PaintDeviceMetric metric) const
{
return 0; // TODO
}
QString LiveView::model() const
{
return "liveview";
}
QStringList LiveView::buttons() const
{
return QStringList();
}
bool LiveView::busy() const
{
return false; // TODO
}
void LiveView::setDateTime(const QDateTime& dateTime)
{
// It seems LiveView _requests_ the current date rather than expecting
// the phone to be sending it.
// Wonder what will happen during DST changes?
// Do nothing here.
}
void LiveView::queryDateTime()
{
// LiveView does not support this.
}
QDateTime LiveView::dateTime() const
{
return QDateTime::currentDateTime();
}
void LiveView::queryBatteryLevel()
{
}
int LiveView::batteryLevel() const
{
return 0; // TODO
}
void LiveView::queryCharging()
{
}
bool LiveView::charging() const
{
return false; // TODO
}
void LiveView::displayIdleScreen()
{
}
void LiveView::displayNotification(Notification *notification)
{
}
void LiveView::displayApplication()
{
}
void LiveView::vibrate(int msecs)
{
}
void LiveView::setupBluetoothWatch()
{
connect(_socket, SIGNAL(readyRead()), SLOT(handleDataReceived()));
updateDisplayProperties();
}
void LiveView::desetupBluetoothWatch()
{
}
void LiveView::send(const Message &msg)
{
_sendingMsgs.enqueue(msg);
if (!_sendTimer->isActive()) {
_sendTimer->start();
}
}
void LiveView::updateDisplayProperties()
{
static const char *software_version = "0.0.3";
send(Message(GetDisplayProperties,
QByteArray(software_version, strlen(software_version) + 1)));
}
void LiveView::updateSoftwareVersion()
{
send(Message(GetSoftwareVersion, QByteArray(1, 0)));
}
void LiveView::enableLed()
{
QByteArray data;
data.append(char(0xFF));
data.append(char(0xFF));
data.append(char(0x00));
data.append(char(0x64));
data.append(char(0x00));
data.append(char(0xFA));
send(Message(EnableLed, data));
}
void LiveView::handleMessage(const Message &msg)
{
send(Message(Ack, QByteArray(1, msg.type)));
switch (msg.type) {
case GetDisplayPropertiesResponse:
handleDisplayProperties(msg);
break;
}
}
void LiveView::handleDisplayProperties(const Message &msg)
{
updateSoftwareVersion();
}
void LiveView::handleDataReceived()
{
#pragma pack(push)
#pragma pack(1)
static const int HEADER_SIZE = 6;
union header_t {
char c[HEADER_SIZE];
struct header_fields_t {
quint8 msg_type;
quint8 header_len;
quint32 data_len;
} h;
} header;
#pragma pack(pop)
Q_ASSERT(sizeof(header) == HEADER_SIZE);
do {
qint64 dataRead;
qDebug() << "received" << _socket->bytesAvailable() << "bytes";
if (_receivingMsg.type == NoMessage) {
/* Still not received even the packet type */
/* Receive the full header. */
if (_socket->bytesAvailable() < HEADER_SIZE) {
/* Still not enough data available. */
return; /* Wait for more, if non blocking. */
}
dataRead = _socket->read(header.c, HEADER_SIZE);
#if PROTOCOL_DEBUG
qDebug() << "received header" << QByteArray(header.c, HEADER_SIZE).toHex();
#endif
if (dataRead < HEADER_SIZE) {
qWarning() << "Short read";
return;
}
_receivingMsg.type = static_cast<MessageType>(header.h.msg_type);
if (header.h.header_len != HEADER_SIZE - 2) {
qWarning() << "Unexpected header length:" << header.h.header_len;
}
unsigned long data_size = qFromBigEndian(header.h.data_len);
if (data_size > 1048576) {
// If input packet is > 1 MiB, consider a protocol error.
qWarning() << "Too large data size: " << data_size;
data_size = 0;
}
_receivingMsg.data.resize(data_size);
qDebug() << "got header (type=" << _receivingMsg.type <<
"size=" << data_size << ")";
}
/* We have the header; now, try to get the complete packet. */
if (_socket->bytesAvailable() < _receivingMsg.data.size()) {
#if PROTOCOL_DEBUG
qDebug() << "Waiting for more data" << _socket->bytesAvailable() << "/" << _receivingMsg.data.size();
#endif
return; /* Wait for more. */
}
dataRead = _socket->read(_receivingMsg.data.data(), _receivingMsg.data.size());
if (dataRead < _receivingMsg.data.size()) {
qWarning() << "Short read";
return;
}
#if PROTOCOL_DEBUG
qDebug() << "received" << _receivingMsg.type << _receivingMsg.data.toHex();
#endif
handleMessage(_receivingMsg);
// Prepare for the next packet
_receivingMsg.data.clear();
_receivingMsg.type = NoMessage;
} while (_socket->bytesAvailable() > 0);
}
void LiveView::handleSendTimerTick()
{
static const int HEADER_SIZE = 6;
qDebug() << "Send tick";
// If there are packets to be sent...
if (!_sendingMsgs.empty()) {
// Send a message to the watch
Message msg = _sendingMsgs.dequeue();
const quint32 data_size = msg.data.size();
QByteArray packet;
Q_ASSERT(_connected && _socket);
packet.resize(HEADER_SIZE + data_size);
packet[0] = msg.type;
packet[1] = HEADER_SIZE - 2;
packet[2] = (data_size & 0xFF000000U) >> 24;
packet[3] = (data_size & 0x00FF0000U) >> 16;
packet[4] = (data_size & 0x0000FF00U) >> 8;
packet[5] = (data_size & 0x000000FFU);
packet.replace(HEADER_SIZE, data_size, msg.data);
#if PROTOCOL_DEBUG
qDebug() << "sending" << packet.toHex();
#endif
_socket->write(packet);
}
// If we just finished sending all packets...
if (_sendingMsgs.empty()) {
// Stop the send timer to save battery
_sendTimer->stop();
}
}
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