private void DoScan()
{
int tvChannelsNew = 0;
int radioChannelsNew = 0;
int tvChannelsUpdated = 0;
int radioChannelsUpdated = 0;
string buttonText = mpButtonScanTv.Text;
try
{
_isScanning = true;
_stopScanning = false;
mpButtonScanTv.Text = "Cancel...";
RemoteControl.Instance.EpgGrabberEnabled = false;
if (_atscChannels.Count == 0)
{
return;
}
mpComboBoxFrequencies.Enabled = false;
listViewStatus.Items.Clear();
TvBusinessLayer layer = new TvBusinessLayer();
Card card = layer.GetCardByDevicePath(RemoteControl.Instance.CardDevice(_cardNumber));
IUser user = new User();
user.CardId = _cardNumber;
int minchan = 2;
int maxchan = 69 + 1;
if ((string)mpComboBoxTuningMode.SelectedItem == "Clear QAM Cable")
{
minchan = 1;
maxchan = _atscChannels.Count + 1;
}
else if ((string)mpComboBoxTuningMode.SelectedItem == "Digital Cable")
{
minchan = 0;
maxchan = 1;
}
for (int index = minchan; index < maxchan; ++index)
{
if (_stopScanning)
{
return;
}
float percent = ((float)(index)) / (maxchan - minchan);
percent *= 100f;
if (percent > 100f)
{
percent = 100f;
}
progressBar1.Value = (int)percent;
ATSCChannel tuneChannel = new ATSCChannel();
tuneChannel.NetworkId = -1;
tuneChannel.TransportId = -1;
tuneChannel.ServiceId = -1;
tuneChannel.MinorChannel = -1;
tuneChannel.MajorChannel = -1;
string line;
if ((string)mpComboBoxTuningMode.SelectedItem == "Clear QAM Cable")
{
tuneChannel.PhysicalChannel = index;
tuneChannel.Frequency = _atscChannels[index - 1].frequency;
if (tuneChannel.Frequency < 10000)
{
continue;
}
tuneChannel.ModulationType = ModulationType.Mod256Qam;
line = string.Format("physical channel = {0}, frequency = {1} kHz, modulation = 256 QAM", tuneChannel.PhysicalChannel, tuneChannel.Frequency);
Log.Info("ATSC: scanning clear QAM cable, {0}, frequency plan = {1}", line, mpComboBoxFrequencies.SelectedItem);
}
else if ((string)mpComboBoxTuningMode.SelectedItem == "ATSC Digital Terrestrial")
{
tuneChannel.PhysicalChannel = index;
tuneChannel.Frequency = -1;
tuneChannel.ModulationType = ModulationType.Mod8Vsb;
line = string.Format("physical channel = {0}, modulation = 8 VSB", tuneChannel.PhysicalChannel);
Log.Info("ATSC: scanning ATSC over-the-air, {0}", line);
}
else
{
tuneChannel.PhysicalChannel = 0;
tuneChannel.ModulationType = ModulationType.Mod256Qam;
line = "out-of-band service information";
Log.Info("ATSC: scanning digital cable, {0}", line);
}
line += "... ";
ListViewItem item = listViewStatus.Items.Add(new ListViewItem(line));
item.EnsureVisible();
if (index == minchan)
{
RemoteControl.Instance.Scan(ref user, tuneChannel, -1);
}
IChannel[] channels = RemoteControl.Instance.Scan(_cardNumber, tuneChannel);
UpdateStatus();
if (channels == null || channels.Length == 0)
{
if (tuneChannel.PhysicalChannel > 0 && !RemoteControl.Instance.TunerLocked(_cardNumber))
{
line += "no signal";
}
else
{
line += "signal locked, no channels found";
}
item.Text = line;
item.ForeColor = Color.Red;
continue;
}
int newChannels = 0;
int updatedChannels = 0;
for (int i = 0; i < channels.Length; ++i)
{
Channel dbChannel;
ATSCChannel channel = (ATSCChannel)channels[i];
//No support for channel moving, or merging with existing channels here.
//We do not know how ATSC works to correctly implement this.
TuningDetail currentDetail = layer.GetTuningDetail(channel);
if (currentDetail != null)
{
if (channel.IsDifferentTransponder(layer.GetTuningChannel(currentDetail)))
{
currentDetail = null;
}
}
bool exists;
if (currentDetail == null)
{
//add new channel
exists = false;
dbChannel = layer.AddNewChannel(channel.Name, channel.LogicalChannelNumber);
dbChannel.SortOrder = 10000;
if (channel.LogicalChannelNumber >= 1)
{
dbChannel.SortOrder = channel.LogicalChannelNumber;
}
}
else
{
exists = true;
dbChannel = currentDetail.ReferencedChannel();
}
dbChannel.IsTv = channel.IsTv;
dbChannel.IsRadio = channel.IsRadio;
dbChannel.Persist();
if (dbChannel.IsTv)
{
layer.AddChannelToGroup(dbChannel, TvConstants.TvGroupNames.AllChannels);
}
if (dbChannel.IsRadio)
{
layer.AddChannelToRadioGroup(dbChannel, TvConstants.RadioGroupNames.AllChannels);
}
if (currentDetail == null)
{
layer.AddTuningDetails(dbChannel, channel);
}
else
{
//update tuning details...
TuningDetail td = layer.UpdateTuningDetails(dbChannel, channel, currentDetail);
td.Persist();
}
if (channel.IsTv)
{
if (exists)
{
tvChannelsUpdated++;
updatedChannels++;
}
else
{
tvChannelsNew++;
newChannels++;
}
}
if (channel.IsRadio)
{
if (exists)
{
radioChannelsUpdated++;
updatedChannels++;
}
else
{
radioChannelsNew++;
newChannels++;
}
}
layer.MapChannelToCard(card, dbChannel, false);
}
line += string.Format("new = {0}, updated = {1}", newChannels, updatedChannels);
item.Text = line;
Log.Info("ATSC: scan result, new = {0}, updated = {1}", newChannels, updatedChannels);
}
}
catch (Exception ex)
{
Log.Write(ex);
}
finally
{
IUser user = new User();
user.CardId = _cardNumber;
RemoteControl.Instance.StopCard(user);
RemoteControl.Instance.EpgGrabberEnabled = true;
progressBar1.Value = 100;
mpComboBoxTuningMode.Enabled = true;
UpdateQamFrequencyFieldAvailability();
mpButtonScanTv.Text = buttonText;
_isScanning = false;
}
listViewStatus.Items.Add(
new ListViewItem(String.Format("Total radio channels, new = {0}, updated = {1}", radioChannelsNew,
radioChannelsUpdated)));
listViewStatus.Items.Add(
new ListViewItem(String.Format("Total TV channels, new = {0} updated = {1}", tvChannelsNew, tvChannelsUpdated)));
ListViewItem lastItem = listViewStatus.Items.Add(new ListViewItem("Scan done!"));
lastItem.EnsureVisible();
Log.Info("ATSC: scan summary, new TV = {0}, updated TV = {1}, new radio = {2}, updated radio = {3}", tvChannelsNew, tvChannelsUpdated, radioChannelsNew, radioChannelsUpdated);
}