So I don't fully understand it, but it looks like the problem is with forecast() in p25_frame_assembler.cc. My guess is that with the current forecast it would sometimes return that 0 Input samples are required because of the float to int conversion. The following code below makes a huge different for performance. What is the best way to submit a pull request?

void

p25_frame_assembler_impl::forecast(int nof_output_items, gr_vector_int &nof_input_items_reqd)

{

// for do_imbe=false: we output packed bytes (4:1 ratio)

// for do_imbe=true: input rate= 4800, output rate= 1600 = 32 * 50 (3:1)

// for do_audio_output: output rate=8000 (ratio 0.6:1)

const size_t nof_inputs = nof_input_items_reqd.size();

double samples_reqd = 4.0 * nof_output_items;

int nof_samples_reqd;

if (d_do_imbe)

samples_reqd = 3.0 * nof_output_items;

samples_reqd = nof_output_items;