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/*
* Copyright (C) 2002,2003 Pascal Haakmat.
*/
#include "../modutils.h"
module modinfo;
module *
module_new() {
MODULE_INIT(&modinfo,
"Normalize",
"Pascal Haakmat",
"Copyright (C) 2002,2003");
return &modinfo;
}
action_group *
module_execute(shell *shl,
int undo) {
int32_t peak = 0, p;
double factor;
int t, map = shl->select_channel_map;
AFframecount start = shl->select_start, end = shl->select_end;
action_group *undo_ag = NULL;
DEBUG("start: %ld, end: %ld\n", start, end);
rwlock_rlock(&shl->sr->rwl);
for(t = 0; t < snd_track_count(shl->sr); t++) {
if((1 << t) & map) {
p = find_peak(shl,
t,
start,
end);
if(p > peak)
peak = p;
}
}
if(peak == 0) {
gui_alert("Not enough memory.");
rwlock_runlock(&shl->sr->rwl);
return NULL;
}
if(shl->module_cancel_requested) {
rwlock_runlock(&shl->sr->rwl);
return NULL;
}
factor = (double)INT32_MAX / (double)peak;
if(undo)
undo_ag = action_group_undo_create(shl,
map,
start,
end - start,
start,
end - start);
DEBUG("undo: %d, undo_ag: %p, peak: %d, factor: %f\n",
undo, undo_ag, peak, factor);
for(t = 0; t < snd_track_count(shl->sr); t++)
if((1 << t) & map)
amplify(shl,
t,
start,
end,
factor,
0);
rwlock_runlock(&shl->sr->rwl);
DEBUG("returning: %p\n", undo_ag);
return undo_ag;
}
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