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a-comp display is getting fancy :)

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This commit is contained in:
Robin Gareus 2016-07-04 15:49:39 +02:00
parent 11f8e3adc4
commit a1a6dd3865
1 changed files with 53 additions and 9 deletions
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60
libs/plugins/a-comp.lv2/a-comp.c
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@ -80,6 +80,8 @@ typedef struct {
float v_ratio;
float v_thresdb;
float v_lvl;
float v_lvl_in;
float v_lvl_out;
#endif
} AComp;
@ -226,6 +228,8 @@ run(LV2_Handle instance, uint32_t n_samples)
}
#endif
float in_peak = 0;
for (i = 0; i < n_samples; i++) {
in0 = input0[i];
in1 = input1[i];
@ -257,6 +261,9 @@ run(LV2_Handle instance, uint32_t n_samples)
*(acomp->gainr) = Lyl;
if (in0 > in_peak) {
in_peak = in0;
}
lgaininp = in0 * Lgain;
output[i] = lgaininp * from_dB(*(acomp->makeup));
@ -272,10 +279,14 @@ run(LV2_Handle instance, uint32_t n_samples)
*(acomp->outlevel) = (max < 0.0056f) ? -45.f : to_dB(max);
#ifdef LV2_EXTENDED
const float v_lvl = (max < 0.001f) ? -60.f : to_dB(max);
if (fabsf (acomp->v_lvl - v_lvl) >= 1) { // quantize to 1dB difference
acomp->v_lvl += .1 * (in_peak - acomp->v_lvl); // crude LPF TODO use n_samples/rate TC
const float v_lvl_in = (acomp->v_lvl < 0.001f) ? -60.f : to_dB(acomp->v_lvl);
const float v_lvl_out = (max < 0.001f) ? -60.f : to_dB(max);
if (fabsf (acomp->v_lvl_out - v_lvl_out) >= 1 || fabsf (acomp->v_lvl_in - v_lvl_in) >= 1) {
// >= 1dB difference
acomp->need_expose = true;
acomp->v_lvl = v_lvl;
acomp->v_lvl_in = v_lvl_in;
acomp->v_lvl_out = v_lvl_out - *acomp->makeup;
}
if (acomp->need_expose && acomp->queue_draw) {
acomp->need_expose = false;
@ -328,7 +339,6 @@ comp_curve (AComp* self, float xg) {
return yg;
}
static LV2_Inline_Display_Image_Surface *
render_inline (LV2_Handle instance, uint32_t w, uint32_t max_h)
{
@ -352,8 +362,10 @@ render_inline (LV2_Handle instance, uint32_t w, uint32_t max_h)
cairo_set_line_width(cr, 1.0);
// draw grid 10dB steps
const double dash1[] = {1, 2};
const double dash2[] = {1, 3};
cairo_save (cr);
cairo_set_line_cap(cr, CAIRO_LINE_CAP_ROUND);
cairo_set_dash(cr, dash2, 2, 2);
cairo_set_source_rgba (cr, 0.5, 0.5, 0.5, 0.5);
@ -369,6 +381,17 @@ render_inline (LV2_Handle instance, uint32_t w, uint32_t max_h)
cairo_line_to (cr, w, y);
cairo_stroke (cr);
}
if (self->v_thresdb < 0) {
cairo_set_source_rgba (cr, 0.5, 0.5, 0.5, 1.0);
const float y = -.5 + floorf (h * (self->v_thresdb / -60.f));
cairo_set_dash(cr, dash1, 2, 2);
cairo_move_to (cr, 0, y);
cairo_line_to (cr, w, y);
cairo_stroke (cr);
cairo_move_to (cr, 0, h);
cairo_line_to (cr, w, 0);
cairo_stroke (cr);
}
cairo_restore (cr);
@ -389,14 +412,35 @@ render_inline (LV2_Handle instance, uint32_t w, uint32_t max_h)
cairo_close_path (cr);
cairo_clip (cr);
// draw signal level
// TODO add a gradient pattern above threshold
// draw signal level & reduction/gradient
const float top = comp_curve (self, 0);
cairo_pattern_t* pat = cairo_pattern_create_linear (0.0, 0.0, 0.0, h);
if (top > self->v_thresdb) {
cairo_pattern_add_color_stop_rgba (pat, 0.0, 0.8, 0.1, 0.1, 0.5);
cairo_pattern_add_color_stop_rgba (pat, top / -60.f, 0.8, 0.1, 0.1, 0.5);
}
if (self->v_knee > 0) {
cairo_pattern_add_color_stop_rgba (pat, (self->v_thresdb / -60.f), 0.7, 0.7, 0.2, 0.5);
cairo_pattern_add_color_stop_rgba (pat, ((self->v_thresdb - self->v_knee) / -60.f), 0.5, 0.5, 0.5, 0.5);
} else {
cairo_pattern_add_color_stop_rgba (pat, (self->v_thresdb / -60.f), 0.7, 0.7, 0.2, 0.5);
cairo_pattern_add_color_stop_rgba (pat, ((self->v_thresdb - .01) / -60.f), 0.5, 0.5, 0.5, 0.5);
}
cairo_pattern_add_color_stop_rgba (pat, 1.0, 0.5, 0.5, 0.5, 0.5);
// maybe cut off at x-position?
const float y = h * (self->v_lvl + 60) / 60.f;
cairo_rectangle (cr, 0, h - y, w, y);
const float x = w * (self->v_lvl_in + 60) / 60.f;
const float y = h * (self->v_lvl_out + 60) / 60.f;
cairo_rectangle (cr, 0, h - y, x, y);
if (self->v_ratio > 1.0) {
cairo_set_source (cr, pat);
} else {
cairo_set_source_rgba (cr, 0.5, 0.5, 0.5, 0.5);
}
cairo_fill (cr);
cairo_pattern_destroy (pat); // TODO cache pattern
// create RGBA surface
cairo_destroy (cr);