2a5d56215c
To properly visualize attack and release we calculate the input level out of
the gain reduction the output level threshold and ratio.
if (output_level >= threshold) { // no expansion
input_level = output_level
} else {
input_level = (gain_reduction - threshold * (1-ratio)) / ratio
}
893 lines
20 KiB
C
893 lines
20 KiB
C
/* a-exp
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* Copyright (C) 2017 Johannes Mueller <github@johannes-mueller.org>
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* based on a-comp (C) 2016 Damien Zammit <damien@zamaudio.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <math.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdbool.h>
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#ifdef LV2_EXTENDED
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#include <cairo/cairo.h>
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#include "ardour/lv2_extensions.h"
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#endif
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#include "lv2/lv2plug.in/ns/lv2core/lv2.h"
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#define AEXP_URI "urn:ardour:a-exp"
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#define AEXP_STEREO_URI "urn:ardour:a-exp#stereo"
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#ifndef M_PI
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# define M_PI 3.14159265358979323846
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#endif
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#ifdef COMPILER_MSVC
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#include <float.h>
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#define isfinite_local(val) (bool)_finite((double)val)
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#else
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#define isfinite_local isfinite
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#endif
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typedef enum {
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AEXP_ATTACK = 0,
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AEXP_RELEASE,
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AEXP_KNEE,
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AEXP_RATIO,
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AEXP_THRESHOLD,
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AEXP_MAKEUP,
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AEXP_GAINR,
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AEXP_OUTLEVEL,
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AEXP_SIDECHAIN,
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AEXP_ENABLE,
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AEXP_A0,
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AEXP_A1,
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AEXP_A2,
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AEXP_A3,
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AEXP_A4,
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} PortIndex;
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typedef struct {
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float* attack;
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float* release;
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float* knee;
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float* ratio;
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float* thresdb;
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float* makeup;
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float* gainr;
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float* outlevel;
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float* sidechain;
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float* enable;
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float* input0;
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float* input1;
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float* sc;
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float* output0;
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float* output1;
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float srate;
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float makeup_gain;
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float tau;
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#ifdef LV2_EXTENDED
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LV2_Inline_Display_Image_Surface surf;
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bool need_expose;
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cairo_surface_t* display;
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LV2_Inline_Display* queue_draw;
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uint32_t w, h;
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/* ports pointers are only valid during run so we'll
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* have to cache them for the display, besides
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* we do want to check for changes
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*/
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float v_knee;
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float v_ratio;
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float v_thresdb;
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float v_gainr;
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float v_makeup;
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float v_lvl_in;
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float v_lvl_out;
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#endif
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} AExp;
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static LV2_Handle
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instantiate(const LV2_Descriptor* descriptor,
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double rate,
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const char* bundle_path,
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const LV2_Feature* const* features)
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{
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AExp* aexp = (AExp*)calloc(1, sizeof(AExp));
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for (int i=0; features[i]; ++i) {
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#ifdef LV2_EXTENDED
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if (!strcmp(features[i]->URI, LV2_INLINEDISPLAY__queue_draw)) {
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aexp->queue_draw = (LV2_Inline_Display*) features[i]->data;
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}
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#endif
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}
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aexp->srate = rate;
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aexp->tau = (1.0 - exp (-2.f * M_PI * 25.f / aexp->srate));
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#ifdef LV2_EXTENDED
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aexp->need_expose = true;
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aexp->v_lvl_out = -70.f;
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#endif
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return (LV2_Handle)aexp;
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}
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static void
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connect_port(LV2_Handle instance,
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uint32_t port,
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void* data)
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{
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AExp* aexp = (AExp*)instance;
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switch ((PortIndex)port) {
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case AEXP_ATTACK:
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aexp->attack = (float*)data;
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break;
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case AEXP_RELEASE:
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aexp->release = (float*)data;
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break;
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case AEXP_KNEE:
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aexp->knee = (float*)data;
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break;
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case AEXP_RATIO:
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aexp->ratio = (float*)data;
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break;
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case AEXP_THRESHOLD:
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aexp->thresdb = (float*)data;
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break;
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case AEXP_MAKEUP:
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aexp->makeup = (float*)data;
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break;
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case AEXP_GAINR:
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aexp->gainr = (float*)data;
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break;
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case AEXP_OUTLEVEL:
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aexp->outlevel = (float*)data;
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break;
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case AEXP_SIDECHAIN:
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aexp->sidechain = (float*)data;
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break;
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case AEXP_ENABLE:
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aexp->enable = (float*)data;
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break;
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default:
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break;
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}
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}
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static void
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connect_mono(LV2_Handle instance,
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uint32_t port,
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void* data)
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{
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AExp* aexp = (AExp*)instance;
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connect_port (instance, port, data);
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switch ((PortIndex)port) {
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case AEXP_A0:
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aexp->input0 = (float*)data;
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break;
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case AEXP_A1:
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aexp->sc = (float*)data;
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break;
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case AEXP_A2:
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aexp->output0 = (float*)data;
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break;
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default:
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break;
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}
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}
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static void
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connect_stereo(LV2_Handle instance,
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uint32_t port,
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void* data)
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{
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AExp* aexp = (AExp*)instance;
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connect_port (instance, port, data);
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switch ((PortIndex)port) {
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case AEXP_A0:
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aexp->input0 = (float*)data;
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break;
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case AEXP_A1:
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aexp->input1 = (float*)data;
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break;
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case AEXP_A2:
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aexp->sc = (float*)data;
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break;
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case AEXP_A3:
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aexp->output0 = (float*)data;
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break;
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case AEXP_A4:
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aexp->output1 = (float*)data;
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break;
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default:
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break;
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}
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}
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// Force already-denormal float value to zero
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static inline float
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sanitize_denormal(float value) {
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if (!isnormal(value)) {
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value = 0.f;
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}
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return value;
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}
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static inline float
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from_dB(float gdb) {
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return (exp(gdb/20.f*log(10.f)));
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}
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static inline float
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to_dB(float g) {
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return (20.f*log10(g));
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}
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static void
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activate(LV2_Handle instance)
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{
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AExp* aexp = (AExp*)instance;
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*(aexp->gainr) = 160.0f;
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*(aexp->outlevel) = -45.0f;
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}
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static void
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run_mono(LV2_Handle instance, uint32_t n_samples)
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{
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AExp* aexp = (AExp*)instance;
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const float* const input = aexp->input0;
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const float* const sc = aexp->sc;
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float* const output = aexp->output0;
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float srate = aexp->srate;
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float width = (6.f * *(aexp->knee)) + 0.01;
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float attack_coeff = exp(-1000.f/(*(aexp->attack) * srate));
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float release_coeff = exp(-1000.f/(*(aexp->release) * srate));
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float max = 0.f;
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float lgaininp = 0.f;
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float Lgain = 1.f;
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float Lxg, Lyg;
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float current_gainr;
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float old_gainr = *aexp->gainr;
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int usesidechain = (*(aexp->sidechain) <= 0.f) ? 0 : 1;
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uint32_t i;
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float ingain;
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float in0;
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float sc0;
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float ratio = *aexp->ratio;
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float thresdb = *aexp->thresdb;
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float makeup = *aexp->makeup;
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float makeup_target = from_dB(makeup);
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float makeup_gain = aexp->makeup_gain;
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const float tau = aexp->tau;
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if (*aexp->enable <= 0) {
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ratio = 1.f;
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thresdb = 0.f;
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makeup = 0.f;
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makeup_target = 1.f;
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}
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#ifdef LV2_EXTENDED
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if (aexp->v_knee != *aexp->knee) {
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aexp->v_knee = *aexp->knee;
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aexp->need_expose = true;
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}
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if (aexp->v_ratio != ratio) {
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aexp->v_ratio = ratio;
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aexp->need_expose = true;
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}
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if (aexp->v_thresdb != thresdb) {
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aexp->v_thresdb = thresdb;
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aexp->need_expose = true;
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}
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if (aexp->v_makeup != makeup) {
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aexp->v_makeup = makeup;
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aexp->need_expose = true;
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}
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#endif
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aexp->v_gainr = 0.0;
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for (i = 0; i < n_samples; i++) {
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in0 = input[i];
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sc0 = sc[i];
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ingain = usesidechain ? fabs(sc0) : fabs(in0);
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Lyg = 0.f;
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Lxg = (ingain==0.f) ? -160.f : to_dB(ingain);
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Lxg = sanitize_denormal(Lxg);
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if (2.f*(Lxg-thresdb) < -width) {
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Lyg = thresdb + (Lxg-thresdb) * ratio;
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Lyg = sanitize_denormal(Lyg);
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} else if (2.f*(Lxg-thresdb) > width) {
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Lyg = Lxg;
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} else {
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Lyg = Lxg + (1.f-ratio)*(Lxg-thresdb-width/2.f)*(Lxg-thresdb-width/2.f)/(2.f*width);
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}
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current_gainr = Lxg - Lyg;
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if (current_gainr > old_gainr) {
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current_gainr = release_coeff*old_gainr + (1.f-release_coeff)*current_gainr;
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} else if (current_gainr < old_gainr) {
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current_gainr = attack_coeff*old_gainr + (1.f-attack_coeff)*current_gainr;
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}
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current_gainr = sanitize_denormal(current_gainr);
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Lgain = from_dB(-current_gainr);
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old_gainr = current_gainr;
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if (current_gainr > aexp->v_gainr) {
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aexp->v_gainr = current_gainr;
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}
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lgaininp = in0 * Lgain;
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makeup_gain += tau * (makeup_target - makeup_gain) + 1e-12;
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output[i] = lgaininp * makeup_gain;
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max = (fabsf(output[i]) > max) ? fabsf(output[i]) : sanitize_denormal(max);
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}
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*(aexp->gainr) = current_gainr;
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*(aexp->outlevel) = (max < 0.0056f) ? -45.f : to_dB(max);
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aexp->makeup_gain = makeup_gain;
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#ifdef LV2_EXTENDED
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const float v_lvl_out = (max < 0.001f) ? -60.f : to_dB(max);
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const float v_lvl_in = v_lvl_out > thresdb ?
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v_lvl_out :
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(aexp->v_lvl_out - thresdb * (1.f-ratio))/ratio;
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if (fabsf (aexp->v_lvl_out - v_lvl_out) >= 1 || fabsf (aexp->v_lvl_in - v_lvl_in) >= 1) {
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// >= 1dB difference
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aexp->need_expose = true;
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aexp->v_lvl_in = v_lvl_in;
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const float relax_coef = exp(-(float)n_samples/srate);
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aexp->v_lvl_out = fmaxf (v_lvl_out, relax_coef*aexp->v_lvl_out + (1.f-relax_coef)*v_lvl_out);
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}
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if (aexp->need_expose && aexp->queue_draw) {
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aexp->need_expose = false;
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aexp->queue_draw->queue_draw (aexp->queue_draw->handle);
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}
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#endif
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}
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static void
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run_stereo(LV2_Handle instance, uint32_t n_samples)
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{
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AExp* aexp = (AExp*)instance;
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const float* const input0 = aexp->input0;
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const float* const input1 = aexp->input1;
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const float* const sc = aexp->sc;
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float* const output0 = aexp->output0;
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float* const output1 = aexp->output1;
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float srate = aexp->srate;
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float width = (6.f * *(aexp->knee)) + 0.01;
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float attack_coeff = exp(-1000.f/(*(aexp->attack) * srate));
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float release_coeff = exp(-1000.f/(*(aexp->release) * srate));
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float max = 0.f;
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float lgaininp = 0.f;
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float rgaininp = 0.f;
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float Lgain = 1.f;
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float Lxg, Lyg;
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float current_gainr;
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float old_gainr = *aexp->gainr;
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int usesidechain = (*(aexp->sidechain) <= 0.f) ? 0 : 1;
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uint32_t i;
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float ingain;
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float in0;
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float in1;
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float sc0;
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float maxabslr;
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float ratio = *aexp->ratio;
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float thresdb = *aexp->thresdb;
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float makeup = *aexp->makeup;
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float makeup_target = from_dB(makeup);
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float makeup_gain = aexp->makeup_gain;
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const float tau = aexp->tau;
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if (*aexp->enable <= 0) {
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ratio = 1.f;
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thresdb = 0.f;
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makeup = 0.f;
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makeup_target = 1.f;
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}
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#ifdef LV2_EXTENDED
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if (aexp->v_knee != *aexp->knee) {
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aexp->v_knee = *aexp->knee;
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aexp->need_expose = true;
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}
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if (aexp->v_ratio != ratio) {
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aexp->v_ratio = ratio;
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aexp->need_expose = true;
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}
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if (aexp->v_thresdb != thresdb) {
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aexp->v_thresdb = thresdb;
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aexp->need_expose = true;
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}
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if (aexp->v_makeup != makeup) {
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aexp->v_makeup = makeup;
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aexp->need_expose = true;
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}
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#endif
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aexp->v_gainr = 0.0;
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for (i = 0; i < n_samples; i++) {
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in0 = input0[i];
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in1 = input1[i];
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sc0 = sc[i];
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maxabslr = fmaxf(fabs(in0), fabs(in1));
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ingain = usesidechain ? fabs(sc0) : maxabslr;
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Lyg = 0.f;
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Lxg = (ingain==0.f) ? -160.f : to_dB(ingain);
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Lxg = sanitize_denormal(Lxg);
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if (2.f*(Lxg-thresdb) < -width) {
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Lyg = thresdb + (Lxg-thresdb) * ratio;
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Lyg = sanitize_denormal(Lyg);
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} else if (2.f*(Lxg-thresdb) > width) {
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Lyg = Lxg;
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} else {
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Lyg = Lxg + (1.f-ratio)*(Lxg-thresdb-width/2.f)*(Lxg-thresdb-width/2.f)/(2.f*width);
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}
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current_gainr = Lxg - Lyg;
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if (current_gainr > old_gainr) {
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current_gainr = release_coeff*old_gainr + (1.f-release_coeff)*current_gainr;
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} else if (current_gainr < old_gainr) {
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current_gainr = attack_coeff*old_gainr + (1.f-attack_coeff)*current_gainr;
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}
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current_gainr = sanitize_denormal(current_gainr);
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Lgain = from_dB(-current_gainr);
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old_gainr = current_gainr;
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if (current_gainr > aexp->v_gainr) {
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aexp->v_gainr = current_gainr;
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}
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lgaininp = in0 * Lgain;
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rgaininp = in1 * Lgain;
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makeup_gain += tau * (makeup_target - makeup_gain) + 1e-12;
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output0[i] = lgaininp * makeup_gain;
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output1[i] = rgaininp * makeup_gain;
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max = (fmaxf(fabs(output0[i]), fabs(output1[i])) > max) ? fmaxf(fabs(output0[i]), fabs(output1[i])) : sanitize_denormal(max);
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}
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*(aexp->gainr) = current_gainr;
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*(aexp->outlevel) = (max < 0.0056f) ? -45.f : to_dB(max);
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aexp->makeup_gain = makeup_gain;
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#ifdef LV2_EXTENDED
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const float v_lvl_out = (max < 0.001f) ? -60.f : to_dB(max);
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|
const float v_lvl_in = v_lvl_out > thresdb ?
|
|
v_lvl_out :
|
|
(aexp->v_lvl_out - thresdb * (1.f-ratio))/ratio;
|
|
|
|
if (fabsf (aexp->v_lvl_out - v_lvl_out) >= 1 || fabsf (aexp->v_lvl_in - v_lvl_in) >= 1) {
|
|
// >= 1dB difference
|
|
aexp->need_expose = true;
|
|
aexp->v_lvl_in = v_lvl_in;
|
|
const float relax_coef = exp(-2.0*n_samples/srate);
|
|
aexp->v_lvl_out = fmaxf (v_lvl_out, relax_coef*aexp->v_lvl_out + (1.f-relax_coef)*v_lvl_out);
|
|
}
|
|
if (aexp->need_expose && aexp->queue_draw) {
|
|
aexp->need_expose = false;
|
|
aexp->queue_draw->queue_draw (aexp->queue_draw->handle);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
|
|
static void
|
|
deactivate(LV2_Handle instance)
|
|
{
|
|
activate(instance);
|
|
}
|
|
|
|
static void
|
|
cleanup(LV2_Handle instance)
|
|
{
|
|
#ifdef LV2_EXTENDED
|
|
AExp* aexp = (AExp*)instance;
|
|
if (aexp->display) {
|
|
cairo_surface_destroy (aexp->display);
|
|
}
|
|
#endif
|
|
|
|
free(instance);
|
|
}
|
|
|
|
|
|
#ifndef MIN
|
|
#define MIN(A,B) ((A) < (B)) ? (A) : (B)
|
|
#endif
|
|
|
|
#ifdef LV2_EXTENDED
|
|
static float
|
|
exp_curve (const AExp* self, float xg) {
|
|
const float knee = self->v_knee;
|
|
const float ratio = self->v_ratio;
|
|
const float thresdb = self->v_thresdb;
|
|
const float makeup = self->v_makeup;
|
|
|
|
const float width = 6.f * knee + 0.01f;
|
|
float yg = 0.f;
|
|
|
|
if (2.f * (xg - thresdb) < -width) {
|
|
yg = thresdb + (xg - thresdb) * ratio;
|
|
} else if (2.f * (xg - thresdb) > width) {
|
|
yg = xg;
|
|
} else {
|
|
yg = xg + (1.f - ratio) * (xg - thresdb - width / 2.f) * (xg - thresdb - width / 2.f) / (2.f * width);
|
|
}
|
|
|
|
yg += makeup;
|
|
|
|
return yg;
|
|
}
|
|
|
|
|
|
static void
|
|
render_inline_full (cairo_t* cr, const AExp* self)
|
|
{
|
|
const float w = self->w;
|
|
const float h = self->h;
|
|
|
|
const float makeup_thres = self->v_thresdb + self->v_makeup;
|
|
|
|
// clear background
|
|
cairo_rectangle (cr, 0, 0, w, h);
|
|
cairo_set_source_rgba (cr, .2, .2, .2, 1.0);
|
|
cairo_fill (cr);
|
|
|
|
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);
|
|
|
|
for (uint32_t d = 1; d < 7; ++d) {
|
|
const float x = -.5 + floorf (w * (d * 10.f / 70.f));
|
|
const float y = -.5 + floorf (h * (d * 10.f / 70.f));
|
|
|
|
cairo_move_to (cr, x, 0);
|
|
cairo_line_to (cr, x, h);
|
|
cairo_stroke (cr);
|
|
|
|
cairo_move_to (cr, 0, y);
|
|
cairo_line_to (cr, w, y);
|
|
cairo_stroke (cr);
|
|
}
|
|
cairo_set_source_rgba (cr, 0.5, 0.5, 0.5, 1.0);
|
|
cairo_set_dash(cr, dash1, 2, 2);
|
|
if (self->v_thresdb < 0) {
|
|
const float y = -.5 + floorf (h * ((makeup_thres - 10.f) / -70.f));
|
|
cairo_move_to (cr, 0, y);
|
|
cairo_line_to (cr, w, y);
|
|
cairo_stroke (cr);
|
|
}
|
|
// diagonal unity
|
|
cairo_move_to (cr, 0, h);
|
|
cairo_line_to (cr, w, 0);
|
|
cairo_stroke (cr);
|
|
cairo_restore (cr);
|
|
|
|
{ // 0, 0
|
|
cairo_set_source_rgba (cr, 0.5, 0.5, 0.5, 0.5);
|
|
const float x = -.5 + floorf (w * (60.f / 70.f));
|
|
const float y = -.5 + floorf (h * (10.f / 70.f));
|
|
cairo_move_to (cr, x, 0);
|
|
cairo_line_to (cr, x, h);
|
|
cairo_stroke (cr);
|
|
cairo_move_to (cr, 0, y);
|
|
cairo_line_to (cr, w, y);
|
|
cairo_stroke (cr);
|
|
}
|
|
|
|
{ // GR
|
|
const float x = -.5 + floorf (w * (62.5f / 70.f));
|
|
const float y = -.5 + floorf (h * (10.0f / 70.f));
|
|
const float wd = floorf (w * (5.f / 70.f));
|
|
const float ht = floorf (h * (55.f / 70.f));
|
|
cairo_rectangle (cr, x, y, wd, ht);
|
|
cairo_fill (cr);
|
|
|
|
const float h_gr = fminf (ht, floorf (h * self->v_gainr / 70.f));
|
|
cairo_set_source_rgba (cr, 0.95, 0.0, 0.0, 1.0);
|
|
cairo_rectangle (cr, x, y, wd, h_gr);
|
|
cairo_fill (cr);
|
|
cairo_set_source_rgba (cr, 0.5, 0.5, 0.5, 0.5);
|
|
cairo_rectangle (cr, x, y, wd, ht);
|
|
cairo_set_source_rgba (cr, 0.75, 0.75, 0.75, 1.0);
|
|
cairo_stroke (cr);
|
|
}
|
|
|
|
// draw curve
|
|
cairo_set_source_rgba (cr, .8, .8, .8, 1.0);
|
|
cairo_move_to (cr, 0, h);
|
|
|
|
for (uint32_t x = 0; x < w; ++x) {
|
|
// plot -60..+10 dB
|
|
const float x_db = 70.f * (-1.f + x / (float)w) + 10.f;
|
|
const float y_db = exp_curve (self, x_db) - 10.f;
|
|
const float y = h * (y_db / -70.f);
|
|
cairo_line_to (cr, x, y);
|
|
}
|
|
cairo_stroke_preserve (cr);
|
|
|
|
cairo_line_to (cr, w, h);
|
|
cairo_close_path (cr);
|
|
cairo_clip (cr);
|
|
|
|
// draw signal level & reduction/gradient
|
|
const float top = exp_curve (self, 0) - 10.f;
|
|
cairo_pattern_t* pat = cairo_pattern_create_linear (0.0, 0.0, 0.0, h);
|
|
if (top > makeup_thres - 10.f) {
|
|
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 / -70.f, 0.8, 0.1, 0.1, 0.5);
|
|
}
|
|
if (self->v_knee > 0) {
|
|
cairo_pattern_add_color_stop_rgba (pat, ((makeup_thres -10.f) / -70.f), 0.7, 0.7, 0.2, 0.5);
|
|
cairo_pattern_add_color_stop_rgba (pat, ((makeup_thres - self->v_knee - 10.f) / -70.f), 0.5, 0.5, 0.5, 0.5);
|
|
} else {
|
|
cairo_pattern_add_color_stop_rgba (pat, ((makeup_thres - 10.f)/ -70.f), 0.7, 0.7, 0.2, 0.5);
|
|
cairo_pattern_add_color_stop_rgba (pat, ((makeup_thres - 10.01f) / -70.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 x = w * (self->v_lvl_in + 60) / 70.f;
|
|
const float y = x + h*self->v_makeup;
|
|
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
|
|
}
|
|
|
|
static void
|
|
render_inline_only_bars (cairo_t* cr, const AExp* self)
|
|
{
|
|
const float w = self->w;
|
|
const float h = self->h;
|
|
|
|
cairo_rectangle (cr, 0, 0, w, h);
|
|
cairo_set_source_rgba (cr, .2, .2, .2, 1.0);
|
|
cairo_fill (cr);
|
|
|
|
|
|
cairo_save (cr);
|
|
|
|
const float ht = 0.25f * h;
|
|
|
|
const float x1 = w*0.05;
|
|
const float wd = w - 2.0f*x1;
|
|
|
|
const float y1 = 0.17*h;
|
|
const float y2 = h - y1 - ht;
|
|
|
|
cairo_set_source_rgba (cr, 0.5, 0.5, 0.5, 0.5);
|
|
|
|
cairo_rectangle (cr, x1, y1, wd, ht);
|
|
cairo_fill (cr);
|
|
|
|
cairo_rectangle (cr, x1, y2, wd, ht);
|
|
cairo_fill (cr);
|
|
|
|
cairo_set_source_rgba (cr, 0.75, 0.0, 0.0, 1.0);
|
|
const float w_gr = (self->v_gainr > 60.f) ? wd : wd * self->v_gainr * (1.f/60.f);
|
|
cairo_rectangle (cr, x1+wd-w_gr, y2, w_gr, ht);
|
|
cairo_fill (cr);
|
|
|
|
if (self->v_lvl_out > -60.f) {
|
|
if (self->v_lvl_out > 10.f) {
|
|
cairo_set_source_rgba (cr, 0.75, 0.0, 0.0, 1.0);
|
|
} else if (self->v_lvl_out > 0.f) {
|
|
cairo_set_source_rgba (cr, 0.66, 0.66, 0.0, 1.0);
|
|
} else {
|
|
cairo_set_source_rgba (cr, 0.0, 0.66, 0.0, 1.0);
|
|
}
|
|
const float w_g = (self->v_lvl_out > 10.f) ? wd : wd * (60.f+self->v_lvl_out) / 70.f;
|
|
cairo_rectangle (cr, x1, y1, w_g, ht);
|
|
cairo_fill (cr);
|
|
}
|
|
|
|
cairo_set_source_rgba (cr, 1.0, 1.0, 1.0, 1.0);
|
|
|
|
const float tck = 0.33*ht;
|
|
|
|
cairo_set_line_width (cr, .5);
|
|
|
|
for (uint32_t d = 1; d < 7; ++d) {
|
|
const float x = x1 + (d * wd * (10.f / 70.f));
|
|
|
|
cairo_move_to (cr, x, y1);
|
|
cairo_line_to (cr, x, y1+tck);
|
|
|
|
cairo_move_to (cr, x, y1+ht);
|
|
cairo_line_to (cr, x, y1+ht-tck);
|
|
|
|
cairo_move_to (cr, x, y2);
|
|
cairo_line_to (cr, x, y2+tck);
|
|
|
|
cairo_move_to (cr, x, y2+ht);
|
|
cairo_line_to (cr, x, y2+ht-tck);
|
|
}
|
|
|
|
cairo_stroke (cr);
|
|
|
|
const float x_0dB = x1 + wd*(60.f/70.f);
|
|
|
|
cairo_move_to (cr, x_0dB, y1);
|
|
cairo_line_to (cr, x_0dB, y1+ht);
|
|
|
|
cairo_rectangle (cr, x1, y1, wd, ht);
|
|
cairo_rectangle (cr, x1, y2, wd, ht);
|
|
cairo_stroke (cr);
|
|
|
|
cairo_set_line_width (cr, 2.0);
|
|
|
|
// visualize threshold
|
|
const float tr = x1 + wd * (60.f+self->v_thresdb) / 70.f;
|
|
cairo_set_source_rgba (cr, 0.95, 0.95, 0.0, 1.0);
|
|
cairo_move_to (cr, tr, y1);
|
|
cairo_line_to (cr, tr, y1+ht);
|
|
cairo_stroke (cr);
|
|
|
|
// visualize ratio
|
|
const float reduced_0dB = self->v_thresdb * (1.f - 1.f/self->v_ratio);
|
|
const float rt = x1 + wd * (60.f+reduced_0dB) / 70.f;
|
|
cairo_set_source_rgba (cr, 0.95, 0.0, 0.0, 1.0);
|
|
cairo_move_to (cr, rt, y1);
|
|
cairo_line_to (cr, rt, y1+ht);
|
|
cairo_stroke (cr);
|
|
}
|
|
|
|
static LV2_Inline_Display_Image_Surface *
|
|
render_inline (LV2_Handle instance, uint32_t w, uint32_t max_h)
|
|
{
|
|
AExp* self = (AExp*)instance;
|
|
|
|
uint32_t h = MIN (w, max_h);
|
|
if (w < 200) {
|
|
h = 40;
|
|
}
|
|
|
|
if (!self->display || self->w != w || self->h != h) {
|
|
if (self->display) cairo_surface_destroy(self->display);
|
|
self->display = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, w, h);
|
|
self->w = w;
|
|
self->h = h;
|
|
}
|
|
|
|
cairo_t* cr = cairo_create (self->display);
|
|
|
|
if (w >= 200) {
|
|
render_inline_full (cr, self);
|
|
} else {
|
|
render_inline_only_bars (cr, self);
|
|
}
|
|
|
|
cairo_destroy (cr);
|
|
|
|
cairo_surface_flush (self->display);
|
|
self->surf.width = cairo_image_surface_get_width (self->display);
|
|
self->surf.height = cairo_image_surface_get_height (self->display);
|
|
self->surf.stride = cairo_image_surface_get_stride (self->display);
|
|
self->surf.data = cairo_image_surface_get_data (self->display);
|
|
|
|
return &self->surf;
|
|
}
|
|
#endif
|
|
|
|
static const void*
|
|
extension_data(const char* uri)
|
|
{
|
|
#ifdef LV2_EXTENDED
|
|
static const LV2_Inline_Display_Interface display = { render_inline };
|
|
if (!strcmp(uri, LV2_INLINEDISPLAY__interface)) {
|
|
return &display;
|
|
}
|
|
#endif
|
|
return NULL;
|
|
}
|
|
|
|
static const LV2_Descriptor descriptor_mono = {
|
|
AEXP_URI,
|
|
instantiate,
|
|
connect_mono,
|
|
activate,
|
|
run_mono,
|
|
deactivate,
|
|
cleanup,
|
|
extension_data
|
|
};
|
|
|
|
static const LV2_Descriptor descriptor_stereo = {
|
|
AEXP_STEREO_URI,
|
|
instantiate,
|
|
connect_stereo,
|
|
activate,
|
|
run_stereo,
|
|
deactivate,
|
|
cleanup,
|
|
extension_data
|
|
};
|
|
|
|
LV2_SYMBOL_EXPORT
|
|
const LV2_Descriptor*
|
|
lv2_descriptor(uint32_t index)
|
|
{
|
|
switch (index) {
|
|
case 0:
|
|
return &descriptor_mono;
|
|
case 1:
|
|
return &descriptor_stereo;
|
|
default:
|
|
return NULL;
|
|
}
|
|
}
|