Re: [Discuss-gnuradio] Question about UHD driver

[Matt Ettus]

There is no need to create multiple copies.  The consuming blocks are each given a pointer to the same data, and the memory is not freed until all the consuming blocks indicate they are done with it.

Matt

On Thu, May 16, 2013 at 11:00 AM, Mark McCarron <address@hidden> wrote:

I am wondering if the UHD driver has the ability to create multiple copies of the stream in memory???

Let's say I have a flow-graph that has two branches, the first pushes complex data to an FFT, whereas the second demodulates a portion of that data into AM.

Does the driver supply a single stream, which is then copied by the application?  Or does it create two copies of the stream and allow each branch of the flow-graph to manipulate the data via pointers?

I'm digging into DMA to see if this is possible, I would be surprised if there was a limitation here.

Regards,

Mark McCarron

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