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jLynx 2023-05-19 08:16:05 +12:00 • committed by GitHub
parent 7aca7ce74d
commit 033c4e9a5b
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107
firmware/baseband/block_decimator.hpp
View file

@ -29,72 +29,71 @@
#include "dsp_types.hpp"
#include "complex.hpp"
template<typename T, size_t N>
template <typename T, size_t N>
class BlockDecimator {
public:
constexpr BlockDecimator(
const size_t factor
) : factor_ { factor }
{
}
public:
constexpr BlockDecimator(
const size_t factor)
: factor_{factor} {
}
void set_input_sampling_rate(const uint32_t new_sampling_rate) {
if( new_sampling_rate != input_sampling_rate() ) {
input_sampling_rate_ = new_sampling_rate;
reset_state();
}
}
void set_input_sampling_rate(const uint32_t new_sampling_rate) {
if (new_sampling_rate != input_sampling_rate()) {
input_sampling_rate_ = new_sampling_rate;
reset_state();
}
}
uint32_t input_sampling_rate() const {
return input_sampling_rate_;
}
uint32_t input_sampling_rate() const {
return input_sampling_rate_;
}
void set_factor(const size_t new_factor) {
if( new_factor != factor() ) {
factor_ = new_factor;
reset_state();
}
}
void set_factor(const size_t new_factor) {
if (new_factor != factor()) {
factor_ = new_factor;
reset_state();
}
}
size_t factor() const {
return factor_;
}
size_t factor() const {
return factor_;
}
uint32_t output_sampling_rate() const {
return input_sampling_rate() / factor();
}
uint32_t output_sampling_rate() const {
return input_sampling_rate() / factor();
}
template<typename BlockCallback>
void feed(const buffer_t<T>& src, BlockCallback callback) {
/* NOTE: Input block size must be >= factor */
template <typename BlockCallback>
void feed(const buffer_t<T>& src, BlockCallback callback) {
/* NOTE: Input block size must be >= factor */
set_input_sampling_rate(src.sampling_rate);
set_input_sampling_rate(src.sampling_rate);
while( src_i < src.count ) {
buffer[dst_i++] = src.p[src_i];
if( dst_i == buffer.size() ) {
callback({ buffer.data(), buffer.size(), output_sampling_rate() });
reset_state();
dst_i = 0;
}
while (src_i < src.count) {
buffer[dst_i++] = src.p[src_i];
if (dst_i == buffer.size()) {
callback({buffer.data(), buffer.size(), output_sampling_rate()});
reset_state();
dst_i = 0;
}
src_i += factor();
}
src_i += factor();
}
src_i -= src.count;
}
src_i -= src.count;
}
private:
std::array<T, N> buffer { };
uint32_t input_sampling_rate_ { 0 };
size_t factor_ { 1 };
size_t src_i { 0 };
size_t dst_i { 0 };
private:
std::array<T, N> buffer{};
uint32_t input_sampling_rate_{0};
size_t factor_{1};
size_t src_i{0};
size_t dst_i{0};
void reset_state() {
src_i = 0;
dst_i = 0;
}
void reset_state() {
src_i = 0;
dst_i = 0;
}
};
#endif/*__BLOCK_DECIMATOR_H__*/
#endif /*__BLOCK_DECIMATOR_H__*/