private IEnumerable <ChannelInfo> FindChannels(ChannelList channelList, string name, string uid)
{
// if there's only a single channel with the given name, use it regardless of UID (allows for a changed freq/tranpsonder)
IList <ChannelInfo> list = channelList.GetChannelByName(name).ToList();
if (list.Count == 1)
{
return(list);
}
string[] uidParts;
if (uid.StartsWith("C") && (uidParts = uid.Split('-')).Length <= 4)
{
// older CSV files didn't use the Transponder as part of the UID, which is necessary
// to distinguish between DVB-T channels with identical (onid,tsid,sid), which may be received
// from multiple regional transmitters on different transponders
int onid = int.Parse(uidParts[1]);
int tsid = int.Parse(uidParts[2]);
int sid = int.Parse(uidParts[3]);
return(channelList.Channels.Where(c =>
c.OriginalNetworkId == onid &&
c.TransportStreamId == tsid &&
c.ServiceId == sid
).ToList());
}
var byUidList = channelList.GetChannelByUid(uid);
return(byUidList);
}
/// <summary>
/// Applies the ordering of a reference list to the TV list
/// </summary>
/// <param name="refDataRoot">object representing the whole reference list file</param>
/// <param name="refList">the particular ChannelList to take the order from</param>
/// <param name="tvList">the particular ChannelList to apply the order to</param>
/// <param name="addProxyChannels">if true, a placeholder channel will be created in the tvList if there is no matching TV channel for a reference channel</param>
/// <param name="positionOffset">can be used to shift the Pr# of the reference list so avoid conflicts with already assigned Pr# in the TV list</param>
/// <param name="chanFilter">a function which is called for each channel in the reference list (with 2nd parameter=true) and TV list (2nd parameter=false) to determine if the channel is part of the reordering
/// This is used to filter for analog/digital, radio/TV, antenna/cable/sat/ip
/// </param>
/// <param name="overwrite">controls whether Pr# will be reassigned to the reference channel when they are already in-use in the TV list</param>
/// <param name="consecutive">when true, consecutive numbers will be used instead of the Pr# in the reference list when applying the order</param>
public void ApplyReferenceList(DataRoot refDataRoot, ChannelList refList, ChannelList tvList, bool addProxyChannels = true, int positionOffset = 0, Func <ChannelInfo, bool, bool> chanFilter = null, bool overwrite = true, bool consecutive = false)
{
// create Hashtable for exact channel lookup
// the UID of a TV channel list contains a source-indicator (Analog, Cable, Sat), which may be undefined in the reference list)
var onidTsidSid = new Dictionary <long, List <ChannelInfo> >();
foreach (var channel in tvList.Channels)
{
var key = DvbKey(channel.OriginalNetworkId, channel.TransportStreamId, channel.ServiceId);
var list = onidTsidSid.TryGet(key);
if (list == null)
{
list = new List <ChannelInfo>();
onidTsidSid.Add(key, list);
}
list.Add(channel);
}
var incNr = 1 + positionOffset;
foreach (var refChannel in refList.Channels.OrderBy(ch => ch.OldProgramNr))
{
if (!(chanFilter?.Invoke(refChannel, true) ?? true))
{
continue;
}
var tvChannels = tvList.GetChannelByUid(refChannel.Uid);
// try to find matching channels based on ONID+TSID+SID
if (tvChannels.Count == 0)
{
var key = DvbKey(refChannel.OriginalNetworkId, refChannel.TransportStreamId, refChannel.ServiceId);
List <ChannelInfo> candidates;
if (key != 0 && onidTsidSid.TryGetValue(key, out candidates))
{
tvChannels = candidates;
// narrow the list down further when a transponder is also provided (i.e. the same TV channel can be received on multiple DVB-T frequencies)
if (tvChannels.Count > 1 && !string.IsNullOrEmpty(refChannel.ChannelOrTransponder))
{
candidates = tvChannels.Where(ch => ch.ChannelOrTransponder == refChannel.ChannelOrTransponder).ToList();
if (candidates.Count > 0)
{
tvChannels = candidates;
}
}
}
}
// try to find matching channels by name
if (tvChannels.Count == 0 && !string.IsNullOrWhiteSpace(refChannel.Name))
{
tvChannels = tvList.GetChannelByName(refChannel.Name).ToList();
}
// get the first unassigned channel from the candidates (e.g. when matching by non-unique names), or fall back to the first matching channel (e.g. by unique ID)
ChannelInfo tvChannel = tvChannels.FirstOrDefault(c => c.GetPosition(0) == -1);
if (tvChannel == null && tvChannels.Count > 0)
{
tvChannel = tvChannels[0];
}
if (tvChannel != null)
{
if (!(chanFilter?.Invoke(tvChannel, false) ?? true))
{
continue;
}
var newNr = consecutive ? incNr++ : refChannel.OldProgramNr + positionOffset;
// handle conflicts when the number is already in-use
var curChans = tvList.GetChannelByNewProgNr(newNr);
if (!overwrite && curChans.Any())
{
continue;
}
foreach (var chan in curChans)
{
chan.NewProgramNr = -1;
}
tvChannel.SetPosition(0, newNr);
tvChannel.Skip = refChannel.Skip;
tvChannel.Lock = refChannel.Lock;
tvChannel.Hidden = refChannel.Hidden;
tvChannel.IsDeleted = refChannel.IsDeleted;
if ((tvChannel.SignalSource & SignalSource.Analog) != 0 && !string.IsNullOrEmpty(refChannel.Name))
{
tvChannel.Name = refChannel.Name;
tvChannel.IsNameModified = true;
}
ApplyFavorites(refDataRoot, refChannel, tvChannel);
}
else if (addProxyChannels)
{
tvChannel = new ChannelInfo(refChannel.SignalSource, refChannel.Uid, refChannel.OldProgramNr, refChannel.Name);
tvList.AddChannel(tvChannel);
}
}
}
private IEnumerable<ChannelInfo> FindChannels(ChannelList channelList, string name, string uid)
{
// if there's only a single channel with the given name, use it regardless of UID (allows for a changed freq/tranpsonder)
IList<ChannelInfo> list = channelList.GetChannelByName(name).ToList();
if (list.Count == 1)
return list;
string[] uidParts;
if (uid.StartsWith("C") && (uidParts = uid.Split('-')).Length <= 4)
{
// older CSV files didn't use the Transponder as part of the UID, which is necessary
// to distinguish between DVB-T channels with identical (onid,tsid,sid), which may be received
// from multiple regional transmitters on different transponders
int onid = int.Parse(uidParts[1]);
int tsid = int.Parse(uidParts[2]);
int sid = int.Parse(uidParts[3]);
return channelList.Channels.Where(c =>
c.OriginalNetworkId == onid &&
c.TransportStreamId == tsid &&
c.ServiceId == sid
).ToList();
}
var byUidList = channelList.GetChannelByUid(uid);
return byUidList;
}
private ChannelInfo FindChannel(ChannelList tvList, int subListIndex, ChannelInfo refChannel, Dictionary <long, List <ChannelInfo> > onidTsidSid)
{
List <ChannelInfo> candidates;
// try to find matching channels based on UID or ONID+TSID+SID+Transponder
var channels = refChannel.Uid == "0-0-0" ? new List <ChannelInfo>() : tvList.GetChannelByUid(refChannel.Uid).ToList();
if (channels.Count == 0)
{
var key = DvbKey(refChannel.OriginalNetworkId, refChannel.TransportStreamId, refChannel.ServiceId);
if (key != 0 && onidTsidSid.TryGetValue(key, out candidates))
{
channels = candidates;
}
// narrow the list down further when a transponder is also provided (i.e. the same channel can be received on multiple DVB-T frequencies)
if (channels.Count > 1 && !string.IsNullOrEmpty(refChannel.ChannelOrTransponder))
{
candidates = channels.Where(ch => ch.ChannelOrTransponder == refChannel.ChannelOrTransponder).ToList();
if (candidates.Count > 0)
{
channels = candidates;
}
}
}
var channel = channels.FirstOrDefault(c => c.GetPosition(subListIndex) == -1);
if (channel != null)
{
return(channel);
}
// try to find matching channels by name
channels = tvList.GetChannelByName(refChannel.Name).Where(c => c.GetPosition(subListIndex) == -1).ToList();
// if the reference list has information about a service type (tv/radio/data), then only consider channels matching it (or lacking service type information)
var serviceType = refChannel.SignalSource & SignalSource.MaskTvRadioData;
if (serviceType != 0)
{
channels = channels.Where(ch =>
{
var m = ch.SignalSource & SignalSource.MaskTvRadioData;
return(m == 0 || m == serviceType);
}).ToList();
}
if (channels.Count == 0)
{
return(null);
}
if (channels.Count > 1)
{
// exact upper/lowercase matching (often there are channels like "DISCOVERY" and "Discovery")
candidates = channels.Where(c => c.Name == refChannel.Name).ToList();
if (candidates.Count > 0)
{
channels = candidates;
}
}
if (channels.Count > 1)
{
// prefer unencrypted channels
candidates = channels.Where(c => c.Encrypted.HasValue && c.Encrypted.Value == false).ToList();
if (candidates.Count > 0)
{
channels = candidates;
}
}
return(channels[0]);
}