Re: [Discuss-gnuradio] Inherited block

Hi Chandan,

I'm no expert in implementation of FEC in GNU Radio, but have you seen the GNU Radio doxygen?
(1) https://gnuradio.org/doc/doxygen/classgr_1_1fec_1_1generic__decoder.html#a68f0c06cc9b57e421d4d755fc7eb60d5
(2) https://gnuradio.org/doc/doxygen/classgr_1_1fec_1_1generic__decoder.html#a0cad8d8b1977ebb9184b6c36ed73db9a
(3) https://gnuradio.org/doc/doxygen/classgr_1_1block.html#a95e37b19dd73c24113ca9b848db00d16
(4) https://gnuradio.org/doc/doxygen/classgr_1_1block.html#abe37ff91774ef438bdfcddd0a47ec1a6
(5) https://gnuradio.org/doc/doxygen/classgr_1_1fec_1_1ldpc__decoder.html#a785ddb7413ea96a32202f53925644ac2

Note that you probably don't have to (and shouldn't) implement (3) and (4); just setting the relative rate by implementing generic_decoder::rate() (5) should do the trick.

At any rate, FEC projects are highly interesting to the community, usually! So could you explain a bit on what you're implementing?

Best regards,
Marcus

On 03.02.2016 09:20, chandan kumar wrote:

Sir,

I want to inherit generic_encoder in my convolutional encoder block to use the functions 

{{

int get_input_size();             ............ (1)

int get_output_size();           .............(2)

}}

and from gr::block I want to use 

{{

int fixed_rate_ninput_to_noutput (int ninput);                  ..........................(3)

int fixed_rate_noutput_to_ninput (int noutput);               ..........................(4)

}}

to setup ninput_items and noutput_items. Can you provide a detailed description of these functions ?

What files will I need to edit other than header and implementation header and .cc files to implement this inherited block ?

Also I am heaving a little misconception about call of function (3). Should I need to call this function or it will call itself?

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