livetrax/libs/surfaces/websockets/strips.cc

/*
 * Copyright (C) 2020 Luciano Iam <lucianito@gmail.com>
 *
 * This program 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 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include "ardour/session.h"
#include "ardour/plugin_insert.h"
#include "ardour/dB.h"
#include "pbd/controllable.h"

#include "strips.h"

using namespace ARDOUR;

int
ArdourStrips::start ()
{
    // take an indexed snapshot of current strips
    StripableList strips;
    session ().get_stripables (strips, PresentationInfo::AllStripables);

    for (StripableList::iterator strip = strips.begin (); strip != strips.end (); ++strip) {
        _strips.push_back (*strip);
    }

    return 0;
}

int
ArdourStrips::stop ()
{
    _strips.clear ();
    return 0;
}

double
ArdourStrips::to_db (double k)
{
    if (k == 0) {
        return -std::numeric_limits<double>::infinity ();
    }

    float db = accurate_coefficient_to_dB (static_cast<float>(k));

    return static_cast<double>(db);
}

double
ArdourStrips::from_db (double db)
{
    if (db < -192) {
        return 0;
    }
    
    float k = dB_to_coefficient (static_cast<float>(db));

    return static_cast<double>(k);
}

double
ArdourStrips::strip_gain (uint32_t strip_n) const
{
    return to_db (nth_strip (strip_n)->gain_control ()->get_value ());
}

void
ArdourStrips::set_strip_gain (uint32_t strip_n, double db)
{
    nth_strip (strip_n)->gain_control ()->set_value (from_db (db), PBD::Controllable::NoGroup);
}

double
ArdourStrips::strip_pan (uint32_t strip_n) const
{
    // scale from [0.0 ; 1.0] to [-1.0 ; 1.0]
    return 2.0 * nth_strip (strip_n)->pan_azimuth_control ()->get_value () - 1.0;
}

void
ArdourStrips::set_strip_pan (uint32_t strip_n, double value)
{
    value = (value + 1.0) / 2.0;
    nth_strip (strip_n)->pan_azimuth_control ()->set_value (value, PBD::Controllable::NoGroup);
}

bool
ArdourStrips::strip_mute (uint32_t strip_n) const
{
    return nth_strip (strip_n)->mute_control ()->muted ();
}

void
ArdourStrips::set_strip_mute (uint32_t strip_n, bool mute)
{
    nth_strip (strip_n)->mute_control ()->set_value (mute ? 1.0 : 0.0, PBD::Controllable::NoGroup);
}

bool
ArdourStrips::strip_plugin_enabled (uint32_t strip_n, uint32_t plugin_n) const
{
    return strip_plugin_insert (strip_n, plugin_n)->enabled ();
}

void
ArdourStrips::set_strip_plugin_enabled (uint32_t strip_n, uint32_t plugin_n, bool enabled)
{
    strip_plugin_insert (strip_n, plugin_n)->enable (enabled);
}

TypedValue
ArdourStrips::strip_plugin_param_value (uint32_t strip_n, uint32_t plugin_n,
    uint32_t param_n) const
{
    return plugin_param_value (strip_plugin_param_control (strip_n, plugin_n, param_n));
}

void
ArdourStrips::set_strip_plugin_param_value (uint32_t strip_n, uint32_t plugin_n,
    uint32_t param_n, TypedValue value)
{
    boost::shared_ptr<AutomationControl> control = strip_plugin_param_control (
        strip_n, plugin_n, param_n);

    if (control) {
        ParameterDescriptor pd = control->desc ();
        double dbl_val;

        if (pd.toggled) {
            dbl_val = static_cast<double>(static_cast<bool>(value));
        } else if (pd.enumeration || pd.integer_step) {
            dbl_val = static_cast<double>(static_cast<int>(value));
        } else {
            dbl_val = static_cast<double>(value);
        }

        control->set_value (dbl_val, PBD::Controllable::NoGroup);
    }
}

uint32_t
ArdourStrips::strip_count () const
{
    return _strips.size ();
}

boost::shared_ptr<Stripable>
ArdourStrips::nth_strip (uint32_t strip_n) const
{
    if (strip_n < _strips.size ()) {
        return _strips[strip_n];
    }

    return boost::shared_ptr<Stripable>();
}

TypedValue
ArdourStrips::plugin_param_value (boost::shared_ptr<ARDOUR::AutomationControl> control)
{
    TypedValue value = TypedValue ();

    if (control) {
        ParameterDescriptor pd = control->desc ();
        
        if (pd.toggled) {
            value = TypedValue (static_cast<bool>(control->get_value ()));
        } else if (pd.enumeration || pd.integer_step) {
            value = TypedValue (static_cast<int>(control->get_value ()));
        } else {
            value = TypedValue (control->get_value ());
        }
    }

    return value;
}

boost::shared_ptr<PluginInsert>
ArdourStrips::strip_plugin_insert (uint32_t strip_n, uint32_t plugin_n) const
{
    boost::shared_ptr<Stripable> strip = nth_strip (strip_n);
    boost::shared_ptr<Route> route = boost::dynamic_pointer_cast<Route> (strip);
    boost::shared_ptr<Processor> processor = route->nth_plugin (plugin_n);

    if (processor) {
        boost::shared_ptr<PluginInsert> insert =
            boost::static_pointer_cast<PluginInsert> (processor);
        
        if (insert) {
            return insert;
        }
    }

    return boost::shared_ptr<PluginInsert>();
}

boost::shared_ptr<AutomationControl>
ArdourStrips::strip_plugin_param_control (uint32_t strip_n, uint32_t plugin_n,
    uint32_t param_n) const
{
    boost::shared_ptr<PluginInsert> insert = strip_plugin_insert (strip_n, plugin_n);

    if (insert) {
        bool ok = false;
        boost::shared_ptr<Plugin> plugin = insert->plugin ();
        uint32_t control_id = plugin->nth_parameter (param_n, ok);

        if (ok && plugin->parameter_is_input (control_id)) {
            boost::shared_ptr<AutomationControl> control =
                insert->automation_control (Evoral::Parameter(PluginAutomation, 0, control_id));
            return control;
        }
    }

    return boost::shared_ptr<AutomationControl>();
}