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#include "freq_shift.h"
#include <volk/volk.h>
#include <cmath>
#ifndef M_PI
#define M_PI 3.14159265358979323846 /* pi */
#endif
namespace dsp
{
FreqShiftBlock::FreqShiftBlock(std::shared_ptr<dsp::stream<complex_t>> input, double samplerate, double shift) : Block(input)
{
set_freq(samplerate, shift);
}
void FreqShiftBlock::work()
{
int nsamples = input_stream->read();
if (nsamples <= 0)
{
input_stream->flush();
return;
}
mtx.lock();
#if VOLK_VERSION >= 030100
volk_32fc_s32fc_x2_rotator2_32fc((lv_32fc_t *)output_stream->writeBuf, (lv_32fc_t *)input_stream->readBuf, (lv_32fc_t *)&phase_delta, (lv_32fc_t *)&phase, nsamples);
#else
volk_32fc_s32fc_x2_rotator_32fc((lv_32fc_t *)output_stream->writeBuf, (lv_32fc_t *)input_stream->readBuf, phase_delta, (lv_32fc_t *)&phase, nsamples);
#endif
mtx.unlock();
input_stream->flush();
output_stream->swap(nsamples);
}
void FreqShiftBlock::set_freq(double samplerate, double shift)
{
mtx.lock();
phase = complex_t(1, 0);
phase_delta = complex_t(cos(hz_to_rad(shift, samplerate)), sin(hz_to_rad(shift, samplerate)));
mtx.unlock();
}
void FreqShiftBlock::set_freq_raw(double freq)
{
mtx.lock();
phase_delta = complex_t(cosf(freq), sinf(freq));
mtx.unlock();
}
}
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