Hi, I used a circular buffer of finite size to keep the past 'N' power values of the sample stream in my block as a part of creating a running sum. This buffer is initialized to 0 in the constructor. The running sum of powers is used to compute the average power used in computing signal correlation.
I have a capture stream (cfile) to test the operation of the block. The test case uses a vector_source_c block to read the contents of the file into memory. The unit tests pass without error. However, when I use the block in a flowgraph in that reads the same file from a file source block gnuradio_companion, I am getting the first few sample values as 0 which cause a divide by zero problem. This messes up the rest of the running sum. I don't want to put an 'if' block that checks for the zero condition as it is not expected that a device/stream would ever spit out zero values. (a) Why am I getting the initial zero samples from the file block in gnuradio_companion and non-zero values when using a vector_source in unit tests? (b) What can I do about it (here specifically as a fix to the situation, and a general guideline to always remember)? I am using GNURadio version 3.7.12. Regards, Anshul
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