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/*
* Copyright © 2017-2020 Wellington Wallace
*
* This file is part of PulseEffects.
*
* PulseEffects is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* PulseEffects is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with PulseEffects. If not, see <https://www.gnu.org/licenses/>.
*/
#include "limiter.hpp"
#include <glibmm/main.h>
#include <array>
#include "util.hpp"
namespace {
void on_post_messages_changed(GSettings* settings, gchar* key, Limiter* l) {
const auto post = g_settings_get_boolean(settings, key);
if (post) {
if (!l->input_level_connection.connected()) {
l->input_level_connection = Glib::signal_timeout().connect(
[l]() {
float inL = 0.0F;
float inR = 0.0F;
g_object_get(l->limiter, "meter-inL", &inL, nullptr);
g_object_get(l->limiter, "meter-inR", &inR, nullptr);
std::array<double, 2> in_peak = {inL, inR};
l->input_level.emit(in_peak);
return true;
},
100);
}
if (!l->output_level_connection.connected()) {
l->output_level_connection = Glib::signal_timeout().connect(
[l]() {
float outL = 0.0F;
float outR = 0.0F;
g_object_get(l->limiter, "meter-outL", &outL, nullptr);
g_object_get(l->limiter, "meter-outR", &outR, nullptr);
std::array<double, 2> out_peak = {outL, outR};
l->output_level.emit(out_peak);
return true;
},
100);
}
if (!l->attenuation_connection.connected()) {
l->attenuation_connection = Glib::signal_timeout().connect(
[l]() {
float att = 0.0F;
g_object_get(l->limiter, "att", &att, nullptr);
l->attenuation.emit(att);
return true;
},
100);
}
} else {
l->input_level_connection.disconnect();
l->output_level_connection.disconnect();
l->attenuation_connection.disconnect();
}
}
} // namespace
Limiter::Limiter(const std::string& tag, const std::string& schema, const std::string& schema_path)
: PluginBase(tag, "limiter", schema, schema_path) {
limiter = gst_element_factory_make("calf-sourceforge-net-plugins-Limiter", nullptr);
if (is_installed(limiter)) {
auto* audioconvert_in = gst_element_factory_make("audioconvert", "limiter_audioconvert_in");
auto* audioconvert_out = gst_element_factory_make("audioconvert", "limiter_audioconvert_out");
gst_bin_add_many(GST_BIN(bin), audioconvert_in, limiter, audioconvert_out, nullptr);
gst_element_link_many(audioconvert_in, limiter, audioconvert_out, nullptr);
auto* pad_sink = gst_element_get_static_pad(audioconvert_in, "sink");
auto* pad_src = gst_element_get_static_pad(audioconvert_out, "src");
gst_element_add_pad(bin, gst_ghost_pad_new("sink", pad_sink));
gst_element_add_pad(bin, gst_ghost_pad_new("src", pad_src));
gst_object_unref(GST_OBJECT(pad_sink));
gst_object_unref(GST_OBJECT(pad_src));
g_object_set(limiter, "bypass", 0, nullptr);
bind_to_gsettings();
g_signal_connect(settings, "changed::post-messages", G_CALLBACK(on_post_messages_changed), this);
// useless write just to force callback call
auto enable = g_settings_get_boolean(settings, "state");
g_settings_set_boolean(settings, "state", enable);
}
}
Limiter::~Limiter() {
util::debug(log_tag + name + " destroyed");
}
void Limiter::bind_to_gsettings() {
g_settings_bind_with_mapping(settings, "input-gain", limiter, "level-in", G_SETTINGS_BIND_DEFAULT,
util::db20_gain_to_linear, util::linear_gain_to_db20, nullptr, nullptr);
g_settings_bind_with_mapping(settings, "limit", limiter, "limit", G_SETTINGS_BIND_GET, util::db20_gain_to_linear,
nullptr, nullptr, nullptr);
// Calf limiter did automatic makeup gain by the same amount given as limit.
// See https://github.com/calf-studio-gear/calf/issues/162
// That is why we reduced the output level accordingly binding both limit and output-gain to the same,
// gsettings key, but from 0.90.2 version the "auto-level" toggle was introduced, so we expose the
// output gain as a separate parameter along with the automatic level button.
// See changelog at https://freshcode.club/projects/calf
g_settings_bind_with_mapping(settings, "output-gain", limiter, "level-out", G_SETTINGS_BIND_GET,
util::db20_gain_to_linear, util::linear_gain_to_db20, nullptr, nullptr);
g_settings_bind_with_mapping(settings, "lookahead", limiter, "attack", G_SETTINGS_BIND_GET, util::double_to_float,
nullptr, nullptr, nullptr);
g_settings_bind_with_mapping(settings, "release", limiter, "release", G_SETTINGS_BIND_GET, util::double_to_float,
nullptr, nullptr, nullptr);
g_settings_bind(settings, "auto-level", limiter, "auto-level", G_SETTINGS_BIND_DEFAULT);
g_settings_bind(settings, "asc", limiter, "asc", G_SETTINGS_BIND_DEFAULT);
g_settings_bind_with_mapping(settings, "asc-level", limiter, "asc-coeff", G_SETTINGS_BIND_GET, util::double_to_float,
nullptr, nullptr, nullptr);
g_settings_bind(settings, "oversampling", limiter, "oversampling", G_SETTINGS_BIND_DEFAULT);
}
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