[Discuss-gnuradio] Seamless waveform switching

[Sean Christopher Young]

I was wondering if I could get some help with a few questions I have 
that I have yet to find answers for:

1. Is there a way to stop transmission only after transmitting the 
complete waveform? Let me elaborate. I specify a wave into a vector 
source. I want to repeat transmission of this source until I tell it to 
stop, however, I want it to complete the transmission of that source 
before it ceases when I call Stop().

2. Is there a method established already for seamlessly switching 
vector sources without ceasing transmission. If I pre-specify a new 
vector source, can I switch between the old and new without stopping, 
disconnecting old source,  connecting new source, and restarting the 
flowgraph. I get about a .5 second delay (which I would like to 
mitigate as much as possible) between the end of the old source and the 
beginning of the new one. 

This problem, however, seems less harmful than being able to complete 
the waveform(question 1) before stopping.

Sean