hvirtual/plugins/normalize/normalize.C

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#include "bcdisplayinfo.h"
#include "bchash.h"
#include "mainprogress.h"
#include "normalize.h"
#include "normalizewindow.h"
#include "picon_png.h"
#include "units.h"
#include "vframe.h"

#include <stdio.h>
#include <string.h>

#include <libintl.h>
#define _(String) gettext(String)
#define gettext_noop(String) String
#define N_(String) gettext_noop (String)

REGISTER_PLUGIN(NormalizeMain)






NormalizeMain::NormalizeMain(PluginServer *server)
 : PluginAClient(server)
{
        load_defaults();
}

NormalizeMain::~NormalizeMain()
{
        save_defaults();
        delete defaults;
}

char* NormalizeMain::plugin_title() { return N_("Normalize"); }
int NormalizeMain::is_realtime() { return 0; }
int NormalizeMain::is_multichannel() { return 1; }


VFrame* NormalizeMain::new_picon()
{
        return new VFrame(picon_png);
}


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

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

        defaults = new BC_Hash(directory);

        defaults->load();

        db_over = defaults->get("DBOVER", 0);
        separate_tracks = defaults->get("SEPERATE_TRACKS", 1);
        return 0;
}

int NormalizeMain::save_defaults()
{
        defaults->update("DBOVER", db_over);
        defaults->update("SEPERATE_TRACKS", separate_tracks);
        defaults->save();
        return 0;
}

int NormalizeMain::get_parameters()
{
        BC_DisplayInfo info;
        NormalizeWindow window(info.get_abs_cursor_x(), info.get_abs_cursor_y());
        window.create_objects(&db_over, &separate_tracks);
        int result = window.run_window();
        return result;
}

int NormalizeMain::start_loop()
{
        char string[BCTEXTLEN];
        sprintf(string, "%s...", plugin_title());
        progress = start_progress(string, (PluginClient::end - PluginClient::start) * 2);

        writing = 0;
        current_position = PluginClient::start;
        peak = new double[PluginClient::total_in_buffers];
        scale = new double[PluginClient::total_in_buffers];
        bzero(peak, sizeof(double) * PluginClient::total_in_buffers);
        return 0;
}


int NormalizeMain::process_loop(double **buffer, int64_t &write_length)
{
        int result = 0;
        int64_t fragment_len;

//printf("NormalizeMain::process_loop 1\n");
        if(writing)
        {
                fragment_len = PluginClient::in_buffer_size;
                if(current_position + fragment_len > PluginClient::end) fragment_len = PluginClient::end - current_position;
//printf("NormalizeMain::process_loop 2 %d %f\n", current_position, scale[0]);

                for(int i = 0; i < PluginClient::total_in_buffers; i++)
                {
                        read_samples(buffer[i], i, current_position, fragment_len);
                        for(int j = 0; j < fragment_len; j++)
                                buffer[i][j] *= scale[i];
                }

//printf("NormalizeMain::process_loop 1 %d %f\n", current_position, scale[0]);
                current_position += fragment_len;
                write_length = fragment_len;
                result = progress->update(PluginClient::end - 
                        PluginClient::start + 
                        current_position - 
                        PluginClient::start);
                if(current_position >= PluginClient::end) result = 1;
        }
        else
        {
// Get peak
//printf("NormalizeMain::process_loop 4\n");
                for(int i = PluginClient::start; 
                        i < PluginClient::end && !result; 
                        i += fragment_len)
                {
                        fragment_len = PluginClient::in_buffer_size;
                        if(i + fragment_len > PluginClient::end) fragment_len = PluginClient::end - i;
//printf("NormalizeMain::process_loop 5\n");

                        for(int j = 0; j < PluginClient::total_in_buffers; j++)
                        {
//printf("NormalizeMain::process_loop 6 %p\n", buffer);
                                read_samples(buffer[j], j, i, fragment_len);
//printf("NormalizeMain::process_loop 7\n");
                                
                                for(int k = 0; k < fragment_len; k++)
                                {
                                        if(peak[j] < fabs(buffer[j][k])) peak[j] = fabs(buffer[j][k]);
                                }
                        }
//printf("NormalizeMain::process_loop 8\n");
                        result = progress->update(i - PluginClient::start);
//printf("NormalizeMain::process_loop 9\n");
                }

// Normalize all tracks
                double max = 0;
                for(int i = 0; i < PluginClient::total_in_buffers; i++)
                {
                        if(peak[i] > max) max = peak[i];
                }
                if(!separate_tracks)
                {
                        for(int i = 0; i < PluginClient::total_in_buffers; i++)
                        {
                                peak[i] = max;
                        }
                }

                for(int i = 0; i < PluginClient::total_in_buffers; i++)
                {
                        scale[i] = DB::fromdb(db_over) / peak[i];
                }
//printf("NormalizeMain::process_loop 10\n");

                char string[BCTEXTLEN];
                sprintf(string, "%s %.0f%%...", plugin_title(), (DB::fromdb(db_over) / max) * 100);
                progress->update_title(string);
// Start writing on next iteration
                writing = 1;
        }

        return result;
}

int NormalizeMain::stop_loop()
{
        progress->stop_progress();
        delete [] peak;
        delete [] scale;
        delete progress;
        return 0;
}

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