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feat: pass fps dynamically

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This commit is contained in:
David Madl
2026-05-19 22:36:24 +02:00
parent d4e0241590
commit 58ed5df87c
10 changed files with 71 additions and 50 deletions
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10
pasada-lib/include/ssf_filter.h
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@@ -18,11 +18,10 @@
*/
class SsfFilter {
protected:
size_t sw;
Filt f_delta_u;
Filt f_window;
public:
SsfFilter(size_t upslope_width);
SsfFilter(double fps);
double filter(double val);
};
@@ -44,16 +43,17 @@ protected:
size_t n_refr;
bool is_refr;
double ssf_nm1;
size_t ssf_usw2;
Filt f_ssf_mean;
public:
/**
* @param len_refr duration of refractory period, in samples
*/
SsfStepDetector(size_t len_refr);
SsfStepDetector(double fps);
double filter(double val);
double peek_threshold();
static size_t initial_samples();
static size_t initial_samples(double fps);
};
/**
@@ -115,7 +115,7 @@ protected:
std::vector<double> ssf_buf;
double sqi;
public:
RunningQualityFilter(size_t upslope_width);
RunningQualityFilter(double fps);
double filter(double y, double ssf, double step);
};

4
pasada-lib/include/step_detector.h
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@@ -36,7 +36,7 @@ protected:
std::vector<double> buf_out;
public:
StepDetector(StepListener *listener, bool debug = false);
StepDetector(double fps, StepListener *listener, bool debug = false);
void filter(std::vector<float> values);
std::vector<double> getBufSsd();
std::vector<double> getBufSqi();
@@ -46,7 +46,7 @@ public:
* Prime the filters using the given input signal.
* Used for debugging (non-realtime processing) to align the signal.
*/
void primeFilters(std::vector<double> sig);
void primeFilters(double fps, std::vector<double> sig);
};
#endif //PASADASUPERPROJECT_STEP_DETECTOR_H

56
pasada-lib/ssf_filter.cpp
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@@ -27,11 +27,18 @@ static std::vector<double> make_ones(size_t sw) {
return ones;
}
SsfFilter::SsfFilter(size_t upslope_width) :
sw(upslope_width),
static int get_upslope_width(double fps) {
// was 4 at 60 fps = 66.7 ms
if (fps == 4.0) throw std::invalid_argument("check SsfFilter ctor call, must pass fps now"); // nice-to remove
int usw = static_cast<int>(std::round(0.0667 * fps));
if (usw == 0) throw std::invalid_argument("upslope_width = 0 computed - low fps?");
return usw;
}
SsfFilter::SsfFilter(double fps) :
// Filt(N, shift, offset, taps)
f_delta_u(2, 0, 0, std::vector<double> {1.0, -1.0}),
f_window(upslope_width, 0, 0, make_ones(upslope_width))
f_window(get_upslope_width(fps), 0, 0, make_ones(get_upslope_width(fps)))
{}
double SsfFilter::filter(double val) {
double du = f_delta_u.filter(val);
@@ -40,18 +47,41 @@ double SsfFilter::filter(double val) {
return ssf;
}
size_t SsfStepDetector::initial_samples() { return (size_t) (3.0 * FPS); }
SsfStepDetector::SsfStepDetector(size_t len_refr) :
static size_t get_initial_samples(double fps) {
if (fps == 12.0) throw std::invalid_argument("check SsfStepDetector ctor call, must pass fps now"); // nice-to remove
int init_samp = static_cast<int>(std::round(3.0 * fps));
if (init_samp == 0) throw std::invalid_argument("init_samp = 0 computed - low fps?");
return init_samp;
}
size_t SsfStepDetector::initial_samples(double fps) { return get_initial_samples(fps); }
static size_t get_len_refr(double fps) {
if (fps == 12.0) throw std::invalid_argument("check SsfStepDetector ctor call, must pass fps now"); // nice-to remove
size_t len_refr = static_cast<size_t>(std::round(fps / (MAX_BPM / 60)));
if (len_refr == 0) throw std::invalid_argument("len_refr = 0 computed - low fps?");
return len_refr;
}
static int get_len_ssf_th_smoothing(double fps) {
// was 6 at 60 fps = 100 ms
if (fps == 12.0) throw std::invalid_argument("check SsfStepDetector ctor call, must pass fps now"); // nice-to remove
int sts = static_cast<int>(std::round(0.100 * fps));
if (sts == 0) throw std::invalid_argument("len_ssf_th_smoothing = 0 computed - low fps?");
return sts;
}
SsfStepDetector::SsfStepDetector(double fps) :
// note: also change above, in initial_samples()
LEN_INIT((size_t) (3.0 * FPS)), // initial window length for ssf_threshold
LEN_TH_WIN((size_t) (3.0 * FPS)), // subsequent window length for ssf_threshold
LEN_INIT(get_initial_samples(fps)), // initial window length for ssf_threshold
LEN_TH_WIN(get_initial_samples(fps)), // subsequent window length for ssf_threshold
num_samples(0),
ssf_threshold(std::numeric_limits<double>::infinity()),
ssf_threshold_nm1(std::numeric_limits<double>::infinity()),
f_ssf_threshold_smoothing(6, 0, 0, make_ones(6)),
len_refr(len_refr), n_refr(0), is_refr(false),
f_ssf_threshold_smoothing(get_len_ssf_th_smoothing(fps), 0, 0, make_ones(get_len_ssf_th_smoothing(fps))),
len_refr(get_len_refr(fps)), n_refr(0), is_refr(false),
ssf_nm1(0.0),
ssf_usw2(get_upslope_width(fps)/2),
f_ssf_mean(LEN_TH_WIN, 0, 0, make_ones(LEN_TH_WIN))
{
assert (LEN_INIT >= LEN_TH_WIN && "LEN_INIT < LEN_TH_WIN, check normalization of initial ssf_threshold");
@@ -89,12 +119,10 @@ double SsfStepDetector::filter(double ssf) {
} else if (num_samples > LEN_TH_WIN) {
//DEBUG_PRINT(std::cerr << "adaptive threshold setting" << std::endl);
// adaptive threshold setting
// +2 is half the window size
// TODO: param upon SsfFilter.upslope_width/2 instead of hardcoding -- also f_ssf_threshold_smoothing(), nb. should be even number
if (num_samples == n_refr + 2) {
// the ssf peak comes SsfFilter.upslope_width/2 = 3 samples (half-window + 1 sample) after the crossing
if (num_samples == n_refr + ssf_usw2 + 1) {
//DEBUG_PRINT(std::cerr << "setting adaptive threshold setting" << std::endl);
ssf_threshold_nm1 = ssf_threshold;
// the ssf peak comes 3 samples (half-window + 1 sample) after the crossing
ssf_threshold = f_ssf_threshold_smoothing.filter(ssf) / ((double) f_ssf_threshold_smoothing.size()) * 0.6;
}
}
@@ -193,7 +221,7 @@ bool RunningQuality::append(std::vector<double> &rawBeat, std::vector<double> &r
}
RunningQualityFilter::RunningQualityFilter(size_t upslope_width) : sqi(0.0) {}
RunningQualityFilter::RunningQualityFilter(double fps) : sqi(0.0) {}
double RunningQualityFilter::filter(double y, double ssf, double step) {
if (step == 1.0) {

12
pasada-lib/step_detector.cpp
View File

@@ -19,13 +19,13 @@ static std::vector<double> hpf_taps_a {1. , -4.83056552, 9.33652742, -9.
static size_t upslope_width = 4;
const size_t len_refr = (size_t) (FPS / (MAX_BPM / 60));
StepDetector::StepDetector(StepListener *listener, bool debug) :
StepDetector::StepDetector(double fps, StepListener *listener, bool debug) :
listener(listener),
f_highpass(hpf_taps_b, hpf_taps_a),
f_neg(1, 0, 0, std::vector<double> {-1.0}),
f_ssf(upslope_width),
f_ssd(len_refr),
f_sqi(upslope_width),
f_ssf(fps),
f_ssd(fps),
f_sqi(fps),
debug(debug)
{}
@@ -56,8 +56,8 @@ std::vector<double> StepDetector::getBufSsd() { return buf_ssd; }
std::vector<double> StepDetector::getBufSqi() { return buf_sqi; }
std::vector<double> StepDetector::getBufOut() { return buf_out; }
void StepDetector::primeFilters(std::vector<double> sig) {
const size_t N_INIT = SsfStepDetector::initial_samples();
void StepDetector::primeFilters(double fps, std::vector<double> sig) {
const size_t N_INIT = SsfStepDetector::initial_samples(fps);
// initialize: feed for priming the filters
for (size_t i = 0; i < N_INIT; i++) {
const auto a_i = static_cast<float>(sig[i]);