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feat: new music visualizer

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This commit is contained in:
Daniel Hammer
2026-03-27 16:29:21 +01:00
parent 78c0cabc77
commit 3f00b2bfaa
3 changed files with 279 additions and 135 deletions
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programs/src/music/visualizer.hpp
+22 -11
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@@ -5,23 +5,34 @@
namespace music_visualizer {
static constexpr int WAVE_HISTORY = 192;
static constexpr int BAND_COUNT = 24;
static constexpr int PROBE_COUNT = 3;
static constexpr int ANALYSIS_SIZE = 512;
struct Probe {
double coeff;
double cosine;
double sine;
};
struct State {
int16_t min_samples[WAVE_HISTORY];
int16_t max_samples[WAVE_HISTORY];
uint8_t energy[WAVE_HISTORY];
int write_pos;
int history_count;
int accum_frames;
int accum_abs_sum;
int accum_min;
int accum_max;
uint8_t levels[BAND_COUNT];
uint8_t peaks[BAND_COUNT];
uint8_t peak_hold[BAND_COUNT];
int sample_rate;
int ring_pos;
int ring_fill;
int samples_since_analyze;
int16_t ring[ANALYSIS_SIZE];
double window[ANALYSIS_SIZE];
Probe probes[BAND_COUNT][PROBE_COUNT];
};
void reset(State& state);
void tick(State& state);
void feed_pcm(State& state, const int16_t* pcm, int frames, int channels);
void feed_pcm(State& state, const int16_t* pcm, int frames, int channels, int sample_rate);
void render(uint32_t* pixels, int bw, int bh, const gui::Rect& rect,
const State& state, gui::Color accent, gui::Color accent_dark,
gui::Color track_bg, gui::Color border);