Channel/ChannelMapping

[whurlston]

On the ChannelMapping(int captureSourceOID, int channelNumber, string tuning, int serviceType) constructor, what is channelNumber (in regards to QAM channels)? It seems to always be 0 in my list of channels.

If I call Channel.LoadForGroup("Clear QAM Channels"), modify the list and then save it back using Channel.SaveAll(), will that remove all other channels in NPVR (meaning I should call Channel.Save() for each individual channel instead)?

If I call Channel.SetChannelMapping(), is this only temporary until Channel.Save() is called or does it save the channel automatically?

Does Channel.SetChannelMapping() overwrite the current mapping for that captureSourceOID or do I need to call Channel.DeleteMapping() first?

[sub]

On the ChannelMapping(int captureSourceOID, int channelNumber, string tuning, int serviceType) constructor, what is channelNumber (in regards to QAM channels)? It seems to always be 0 in my list of channels.

The channel number is only used for analog/hdpvr channels, as part of tuning. For digital and other tuner types, it uses tuning string. ie, can the number can be anything for your QAM channels

If I call Channel.LoadForGroup("Clear QAM Channels"), modify the list and then save it back using Channel.SaveAll(), will that remove all other channels in NPVR (meaning I should call Channel.Save() for each individual channel instead)?

Calling channel.Save() updates that channel's data in the database. Calling Channel.SaveAll(x) does exactly the same as channel.Save(), but does it on multiple channels for speed. ie, it's only saving those channels passed in, and doesn't effect any other channels you haven't called Save()/SaveAll() on.

If I call Channel.SetChannelMapping(), is this only temporary until Channel.Save() is called or does it save the channel automatically?

It's only temporary until it's saved....however, you may find that mapping is not usable until you saved it. ie, some code reloads the mappings rather than using a mapping passed in.

Does Channel.SetChannelMapping() overwrite the current mapping for that captureSourceOID or do I need to call Channel.DeleteMapping() first?

SetChannelMapping will replace any existing mapping for that CaptureSourceOID.

[whurlston]

Awesome. I probably won't call SetChannelMapping() until I've ready to save the channel then (in case of any code that uses a mapping passed in) so as not to affect anything. Makes undo simpler too.

On a fresh setup, I'm able to automatically name/renumber 99 of 102 channels, and in the case of channels being moved, I'm able to automatically detect and remap 86 of 106 (more once I link my current channel names to the names given in the VirtualChannelMap).

[sub]

Great! That certainly looks like it'd take a lot of the pain out of QAM mapping.

[whurlston]

Yeah, it's not going to be perfect but it will help a lot.