hvirtual/plugins/gain/gain.C

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#include "clip.h"
#include "confirmsave.h"
#include "bchash.h"
#include "errorbox.h"
#include "filexml.h"
#include "language.h"
#include "picon_png.h"
#include "gain.h"
#include "gainwindow.h"

#include "vframe.h"

#include <string.h>


REGISTER_PLUGIN(Gain)


GainConfig::GainConfig()
{
        level = 0.0;
}

int GainConfig::equivalent(GainConfig &that)
{
        return EQUIV(level, that.level);
}

void GainConfig::copy_from(GainConfig &that)
{
        this->level = that.level;
}

void GainConfig::interpolate(GainConfig &prev, 
        GainConfig &next, 
        int64_t prev_frame, 
        int64_t next_frame, 
        int64_t current_frame)
{
        double next_scale = (double)(current_frame - prev_frame) / (next_frame - prev_frame);
        double prev_scale = (double)(next_frame - current_frame) / (next_frame - prev_frame);
        level = prev.level * prev_scale + next.level * next_scale;
}









Gain::Gain(PluginServer *server)
 : PluginAClient(server)
{
        PLUGIN_CONSTRUCTOR_MACRO
}

Gain::~Gain()
{
        PLUGIN_DESTRUCTOR_MACRO
}

char* Gain::plugin_title() { return N_("Gain"); }
int Gain::is_realtime() { return 1; }


SHOW_GUI_MACRO(Gain, GainThread)
SET_STRING_MACRO(Gain)
RAISE_WINDOW_MACRO(Gain)
NEW_PICON_MACRO(Gain)
LOAD_CONFIGURATION_MACRO(Gain, GainConfig)

int Gain::process_realtime(int64_t size, double *input_ptr, double *output_ptr)
{
        load_configuration();

        double gain = db.fromdb(config.level);

        for(int64_t i = 0; i < size; i++)
        {
                output_ptr[i] = input_ptr[i] * gain;
        }

        return 0;
}



int Gain::load_defaults()
{
        char directory[BCTEXTLEN];

// set the default directory
        sprintf(directory, "%sgain.rc", get_defaultdir());
        
// load the defaults

        defaults = new BC_Hash(directory);

        defaults->load();

        config.level = defaults->get("LEVEL", config.level);

        return 0;
}

int Gain::save_defaults()
{
        defaults->update("LEVEL", config.level);
        defaults->save();
        return 0;
}

void Gain::save_data(KeyFrame *keyframe)
{
        FileXML output;

// cause xml file to store data directly in text
        output.set_shared_string(keyframe->data, MESSAGESIZE);

        output.tag.set_title("GAIN");
        output.tag.set_property("LEVEL", config.level);
        output.append_tag();
        output.tag.set_title("/GAIN");
        output.append_tag();
        output.append_newline();
        output.terminate_string();
}

void Gain::read_data(KeyFrame *keyframe)
{
        FileXML input;
// cause xml file to read directly from text
        input.set_shared_string(keyframe->data, strlen(keyframe->data));
        int result = 0;

        result = input.read_tag();

        if(!result)
        {
                if(input.tag.title_is("GAIN"))
                {
                        config.level = input.tag.get_property("LEVEL", config.level);
                }
        }
}

void Gain::update_gui()
{
        if(thread)
        {
                load_configuration();
                thread->window->lock_window();
                thread->window->level->update(config.level);
                thread->window->unlock_window();
        }
}

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