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Enhance Graphic Equalizer Visualization with Improved Frequency Bands and Response (#2614)

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RocketGod 2025-04-10 13:16:18 -07:00 • committed by GitHub
parent 319ed3e7b4
commit eff214cc79
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2 changed files with 37 additions and 31 deletions
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51
firmware/application/external/gfxeq/ui_gfxeq.cpp vendored
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@ -112,49 +112,44 @@ void gfxEQView::update_audio_spectrum(const AudioSpectrum& spectrum) {
float total_energy = 0;
int bin_count = 0;
// Apply standard EQ frequency response curve (inverted V shape)
for (int bin = start_bin; bin <= end_bin; bin++) {
float weight = 1.0f;
float normalized_bin = bin / 127.0f; // 0.0 to 1.0
// Boosting mid frequencies per standard graphic EQ curve
if (normalized_bin >= 0.2f && normalized_bin <= 0.7f) {
// Create an inverted V shape with peak at 0.45 (middle frequencies)
float distance_from_mid = fabs(normalized_bin - 0.45f);
weight = 2.2f - (distance_from_mid * 2.0f); // Max 2.2x boost at center
}
// Add extra low-frequency sensitivity
if (bar < 5) {
weight *= (1.8f - (bar * 0.15f));
}
total_energy += spectrum.db[bin] * weight;
total_energy += spectrum.db[bin];
bin_count++;
}
uint8_t avg_db = bin_count > 0 ? (total_energy / bin_count) : 0;
float avg_db = bin_count > 0 ? (total_energy / bin_count) : 0;
// Scale all bands to reasonable levels
float band_scale = 0.85f;
// Manually boost highs for better visual balance
float treble_boost = 1.0f;
if (bar == 10)
treble_boost = 1.7f;
else if (bar >= 9)
treble_boost = 1.3f;
else if (bar >= 7)
treble_boost = 1.3f;
// Get the height in display units
int target_height = (avg_db * RENDER_HEIGHT * band_scale) / 255;
// Mid emphasis for a V-shape effect
float mid_boost = 1.0f;
if (bar == 4 || bar == 5 || bar == 6) mid_boost = 1.2f;
float amplified_db = avg_db * treble_boost * mid_boost;
if (amplified_db > 255) amplified_db = 255;
float band_scale = 1.0f;
int target_height = (amplified_db * RENDER_HEIGHT * band_scale) / 255;
// Cap maximum height to prevent overshoot
if (target_height > RENDER_HEIGHT) {
target_height = RENDER_HEIGHT;
}
// Apply different speeds for rise and fall
float rise_speed = 0.7f;
float fall_speed = 0.12f;
// Adjusted to look nice to my eyes
float rise_speed = 0.8f;
float fall_speed = 1.0f;
if (target_height > bar_heights[bar]) {
// Fast rise response
bar_heights[bar] = bar_heights[bar] * (1.0f - rise_speed) + target_height * rise_speed;
} else {
// Slow fall response
bar_heights[bar] = bar_heights[bar] * (1.0f - fall_speed) + target_height * fall_speed;
}
}