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amplify.c
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amplify.c
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/*****************************************************************************
* Gnome Wave Cleaner Version 0.19
* Copyright (C) 2001 Jeffrey J. Welty
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*******************************************************************************/
/* amplify.c */
#include <stdlib.h>
#include "gwc.h"
#define BUFSIZE 10000
static gfloat amount_first[2] = {1.0,1.0} ;
static gfloat amount_last[2] = {1.0,1.0} ;
static gfloat amount_first_l[2] = {1.0,0.0} ;
static gfloat amount_last_l[2] = {1.0,0.0} ;
static gfloat amount_first_r[2] = {0.0,1.0} ;
static gfloat amount_last_r[2] = {0.0,1.0} ;
static int feather_width = 20 ;
void simple_amplify_audio(struct sound_prefs *p, long first, long last, int channel_mask, double amount)
{
long left[BUFSIZE], right[BUFSIZE] ;
long current, i ;
int loops = 0 ;
current = first ;
push_status_text("Amplifying audio") ;
update_progress_bar(0.0,PROGRESS_UPDATE_INTERVAL,TRUE) ;
{
while(current <= last) {
long n = MIN(last - current + 1, BUFSIZE) ;
long tmplast = current + n - 1 ;
gfloat p = (gfloat)(current-first)/(last-first+1) ;
n = read_wavefile_data(left, right, current, tmplast) ;
update_progress_bar(p,PROGRESS_UPDATE_INTERVAL,FALSE) ;
for(i = 0 ; i < n ; i++) {
if(channel_mask & 0x01) {
left[i] = lrint(amount*left[i]) ;
}
if(channel_mask & 0x02) {
right[i] = lrint(amount*right[i]) ;
}
}
write_wavefile_data(left, right, current, tmplast) ;
current += n ;
if(last - current < 10) loops++ ;
if(loops > 5) {
warning("infinite loop in amplify_audio, programming error\n") ;
}
}
resample_audio_data(p, first, last) ;
save_sample_block_data(p) ;
}
update_progress_bar(0.0,PROGRESS_UPDATE_INTERVAL,TRUE) ;
pop_status_text() ;
main_redraw(FALSE, TRUE) ;
}
void amplify_audio(struct sound_prefs *p, long first, long last, int channel_mask)
{
long left[BUFSIZE], right[BUFSIZE] ;
long current, i ;
int loops = 0 ;
current = first ;
push_status_text("Amplifying audio") ;
update_progress_bar(0.0,PROGRESS_UPDATE_INTERVAL,TRUE) ;
{
while(current <= last) {
long n = MIN(last - current + 1, BUFSIZE) ;
long tmplast = current + n - 1 ;
gfloat p = (gfloat)(current-first)/(last-first+1) ;
n = read_wavefile_data(left, right, current, tmplast) ;
update_progress_bar(p,PROGRESS_UPDATE_INTERVAL,FALSE) ;
for(i = 0 ; i < n ; i++) {
long icurrent = current + i ;
double p_last = (double)(icurrent-first+1)/(double)(last-first+1) ;
double p_first = 1.0 - p_last ;
double feather_p = 1.0 ;
double wet_left, wet_right ;
if(icurrent - first < feather_width)
feather_p = (double)(icurrent-first)/(double)(feather_width) ;
if(last - icurrent < feather_width)
feather_p = (double)(last - icurrent)/(double)(feather_width) ;
if(channel_mask & 0x01) {
wet_left = ((double)left[i]*(amount_first_l[0]*p_first+amount_last_l[0]*p_last)) ;
wet_left += ((double)right[i]*(amount_first_r[0]*p_first+amount_last_r[0]*p_last)) ;
}
if(channel_mask & 0x02) {
wet_right = ((double)left[i]*(amount_first_l[1]*p_first+amount_last_l[1]*p_last)) ;
wet_right += ((double)right[i]*(amount_first_r[1]*p_first+amount_last_r[1]*p_last)) ;
}
if(channel_mask & 0x01) {
left[i] = lrint((double)left[i]*(1.0-feather_p) + wet_left*feather_p) ;
}
if(channel_mask & 0x02) {
right[i] = lrint((double)right[i]*(1.0-feather_p) + wet_right*feather_p) ;
}
}
write_wavefile_data(left, right, current, tmplast) ;
current += n ;
if(last - current < 10) loops++ ;
if(loops > 5) {
warning("infinite loop in amplify_audio, programming error\n") ;
}
}
resample_audio_data(p, first, last) ;
save_sample_block_data(p) ;
}
update_progress_bar(0.0,PROGRESS_UPDATE_INTERVAL,TRUE) ;
pop_status_text() ;
main_redraw(FALSE, TRUE) ;
}
int amplify_dialog(struct sound_prefs current, struct view *v)
{
GtkWidget *dlg, *maxtext, *dialog_table, *leftframe, *rightframe, *l_tbl, *r_tbl ;
GtkWidget *amount_first_entry_l[2] ;
GtkWidget *amount_last_entry_l[2] ;
GtkWidget *amount_first_entry_r[2] ;
GtkWidget *amount_last_entry_r[2] ;
GtkWidget *feather_width_entry ;
int dclose = 0 ;
int row = 0 ;
int dres ;
char buf[200] ;
/* Alister: everything using gtkcurve has been commented out since gwc-0.20-09 and it appears prior to that */
/* the implementation was never actually completed i.e. the widget worked, but it didn't do anything except */
/* print values to stdout. */
/* GtkWidget *curve ; */
/* gfloat curve_data[20] ; */
dialog_table = gtk_table_new(3,1,0) ;
l_tbl = gtk_table_new(5,2,0) ;
r_tbl = gtk_table_new(5,2,0) ;
gtk_table_set_row_spacings(GTK_TABLE(dialog_table), 12) ;
gtk_table_set_col_spacings(GTK_TABLE(dialog_table), 6) ;
gtk_widget_show (dialog_table);
gtk_table_set_row_spacings(GTK_TABLE(l_tbl), 4) ;
gtk_table_set_col_spacings(GTK_TABLE(l_tbl), 6) ;
gtk_container_set_border_width(GTK_CONTAINER(l_tbl), 5) ;
gtk_widget_show (l_tbl);
gtk_table_set_row_spacings(GTK_TABLE(r_tbl), 4) ;
gtk_table_set_col_spacings(GTK_TABLE(r_tbl), 6) ;
gtk_container_set_border_width(GTK_CONTAINER(r_tbl), 5) ;
gtk_widget_show (r_tbl);
dlg = gtk_dialog_new_with_buttons("Amplify",
GTK_WINDOW(main_window), GTK_DIALOG_DESTROY_WITH_PARENT,
GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
GTK_STOCK_OK, GTK_RESPONSE_OK, NULL, NULL);
gtk_dialog_set_default_response (GTK_DIALOG(dlg), GTK_RESPONSE_OK);
sprintf(buf, "Maximum amplification without clipping is %6.2f.\n", (double)1.0/(double)current.max_value) ;
maxtext = gtk_label_new (buf);
gtk_widget_show (maxtext);
gtk_box_pack_start (GTK_BOX (GTK_DIALOG(dlg)->vbox), maxtext, TRUE, TRUE, 0);
/* curve = gtk_curve_new (); */
/* gtk_box_pack_start (GTK_BOX (GTK_DIALOG(dlg)->vbox), curve, TRUE, TRUE, row++); */
/* gtk_widget_show (curve); */
/* //gtk_curve_set_curve_type(GTK_CURVE(curve),GTK_CURVE_TYPE_LINEAR) ; */
/* gtk_curve_set_range(GTK_CURVE(curve),0.0,100.0,0.0,100.0) ; */
/* gtk_curve_reset(GTK_CURVE(curve)) ; */
/* //gtk_curve_set_vector(GTK_CURVE(curve),2,curve_data) ; */
leftframe = gtk_frame_new ("Left channel source");
gtk_container_add(GTK_CONTAINER(leftframe), l_tbl) ;
gtk_widget_show (leftframe);
gtk_table_attach_defaults(GTK_TABLE(dialog_table), leftframe, 0, 2, row, row+1) ;
row++ ;
amount_first_entry_l[0] = add_number_entry_with_label_double(amount_first_l[0], "Left Channel beginning:", l_tbl, 0) ;
amount_last_entry_l[0] = add_number_entry_with_label_double(amount_last_l[0], "Left Channel end:", l_tbl, 1) ;
amount_first_entry_r[0] = add_number_entry_with_label_double(amount_first_r[0], "Right Channel beginning:", l_tbl, 2) ;
amount_last_entry_r[0] = add_number_entry_with_label_double(amount_last_r[0], "Right Channel end:", l_tbl, 3) ;
rightframe = gtk_frame_new ("Right channel source");
gtk_container_add(GTK_CONTAINER(rightframe), r_tbl) ;
gtk_widget_show (rightframe);
gtk_table_attach_defaults(GTK_TABLE(dialog_table), rightframe, 0, 2, row, row+1) ;
row++ ;
amount_first_entry_l[1] = add_number_entry_with_label_double(amount_first_l[1], "Left Channel beginning:", r_tbl, 0) ;
amount_last_entry_l[1] = add_number_entry_with_label_double(amount_last_l[1], "Left Channel end:", r_tbl, 1) ;
amount_first_entry_r[1] = add_number_entry_with_label_double(amount_first_r[1], "Right Channel beginning:", r_tbl, 2) ;
amount_last_entry_r[1] = add_number_entry_with_label_double(amount_last_r[1], "Right Channel end:", r_tbl, 3) ;
feather_width_entry = add_number_entry_with_label_int(feather_width, "Feather width", dialog_table, row++) ;
gtk_box_pack_start (GTK_BOX (GTK_DIALOG(dlg)->vbox), dialog_table, TRUE, TRUE, 0);
dres = gwc_dialog_run(GTK_DIALOG(dlg)) ;
if(dres == 0) {
int i ;
for(i = 0 ; i < 2 ; i++) {
amount_first_l[i] = atof(gtk_entry_get_text((GtkEntry *)amount_first_entry_l[i])) ;
amount_last_l[i] = atof(gtk_entry_get_text((GtkEntry *)amount_last_entry_l[i])) ;
amount_first_r[i] = atof(gtk_entry_get_text((GtkEntry *)amount_first_entry_r[i])) ;
amount_last_r[i] = atof(gtk_entry_get_text((GtkEntry *)amount_last_entry_r[i])) ;
}
feather_width = atoi(gtk_entry_get_text((GtkEntry *)feather_width_entry)) ;
dclose = 1 ;
}
/* { */
/* int i ; */
/* */
/* gtk_curve_get_vector(GTK_CURVE(curve), 10, curve_data) ; */
/* */
/* for(i = 0 ; i < 10 ; i++) { */
/* printf("%lg %lg\n", curve_data[i*2], curve_data[i*2+1]) ; */
/* } */
/* */
/* } */
gtk_widget_destroy(dlg) ;
if(dres == 0)
return 1 ;
return 0 ;
}
void batch_normalize(struct sound_prefs *p, long first, long last, int channel_mask)
{
amount_first_l[0] = (double)1.0/(double)p->max_value;
amount_last_l[0] = amount_first_l[0] ;
amount_first_r[1] = amount_first_l[0] ;
amount_last_r[1] = amount_first_l[0] ;
feather_width = 2000;
//fprintf(stderr, "Maximum amplification without clipping is %f \n", amount_first_l[0]) ;
amplify_audio(p,first,last,channel_mask);
}