TopBlock(double centerFreq, double sampleRate, double freqRes, double cycFreqRes, std::string fileName) :
gr_top_block("Top Block"),
Np(pow2roundup((int)sampleRate/freqRes)),
L(Np/4),
P(pow2roundup(sampleRate/cycFreqRes/L)),
N(P*L),
vector_length(N),
source(osmosdr_make_source_c()), /* OsmoSDR Source */
fileSource(gr_make_file_source(sizeof(float)*2, "/home/ylb/QAM16_44_1k.dat", false)),
stv(gr_make_stream_to_vector(sizeof(float)*2, vector_length)), /* Stream to vector */
/* autoFam - this does most of the interesting work */
sink(make_autofam_sink(source, vector_length, centerFreq, sampleRate, freqRes, cycFreqRes, fileName))
{
/* Set up the OsmoSDR Source */
source->set_sample_rate(sampleRate);
source->set_center_freq(centerFreq);
source->set_freq_corr(0.0);
source->set_gain_mode(false);
source->set_gain(30);
source->set_if_gain(25.0);
/* Set up the connections */
connect(fileSource, 0, stv, 0);
connect(stv, 0, sink, 0);
}
/*! \brief Start playback of recorded I/Q data file.
* \param filename The file to play from. Must be raw file containing gr_complex samples.
* \param samprate The sample rate (currently fixed at 96ksps)
*/
receiver::status receiver::start_iq_playback(const std::string filename, float samprate)
{
#if 0
if (samprate != d_bandwidth) {
return STATUS_ERROR;
}
try {
iq_src = gr_make_file_source(sizeof(gr_complex), filename.c_str(), false);
}
catch (std::runtime_error &e) {
std::cout << "Error loading " << filename << ": " << e.what() << std::endl;
return STATUS_ERROR;
}
tb->lock();
/* disconenct hardware source */
tb->disconnect(src, 0, nb, 0);
tb->disconnect(src, 0, iq_sink, 0);
/* connect I/Q source via throttle block */
tb->connect(iq_src, 0, nb, 0);
tb->connect(iq_src, 0, iq_sink, 0);
tb->unlock();
#endif
return STATUS_OK;
}
