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#include "agc2.h"
namespace dsp
{
template <typename T>
AGC2Block<T>::AGC2Block(std::shared_ptr<dsp::stream<T>> input, float target, float bias, float gain)
: Block<T, T>(input),
d_target(target), d_bias(bias), d_gain(gain)
{
moving_avg = d_target;
}
template <typename T>
void AGC2Block<T>::work()
{
int nsamples = Block<T, T>::input_stream->read();
if (nsamples <= 0)
{
Block<T, T>::input_stream->flush();
return;
}
for (int i = 0; i < nsamples; i++)
{
T sample = Block<T, T>::input_stream->readBuf[i];
if constexpr (std::is_same_v<T, float>)
{
if (sample != 0)
{
sample -= bias; // Apply current DC bias
bias = bias * (1 - d_bias) + sample * d_bias; // Calculate new DC bias
gain = d_target / moving_avg; // Calculate new gain
moving_avg = moving_avg * (1 - d_gain) + fabsf(sample) * d_gain; // Moving average to calculate gain
sample *= gain; // Apply gain
}
}
if constexpr (std::is_same_v<T, complex_t>)
{
}
Block<T, T>::output_stream->writeBuf[i] = sample;
}
Block<T, T>::input_stream->flush();
Block<T, T>::output_stream->swap(nsamples);
}
template class AGC2Block<complex_t>;
template class AGC2Block<float>;
}
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