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/*
* Dynamic Noise Reduction (based on the VirtualDub filter by Steven Don)
*
* Copyright (c) 2005 Peter Schlaile
*
* 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.
*
*/
#include "math.h"
#include "plugin.h"
#include <stdio.h>
char name[]= "Dynamic Noise Reduction";
VarStruct varstr[]= {
{ NUMSLI|INT, "Level:", 10.0, 0.0, 15.0, "Level"},
};
typedef struct Cast {
int level;
} Cast;
float cfra;
void * plugin_private_data;
struct my_data {
unsigned char lookup_table[65536];
int last_level;
float last_cfra;
int last_width;
int last_height;
unsigned char * last_frame;
};
void plugin_seq_doit(Cast *, float, float, int, int,
ImBuf *, ImBuf *, ImBuf *, ImBuf *);
int plugin_seq_getversion(void) { return B_PLUGIN_VERSION;}
static void precalculate(unsigned char * table, int level)
{
int ap_, bp;
for (ap_ = 0; ap_ < 256; ap_++) {
for (bp = 0; bp < 256; bp++) {
int ap = ap_;
int diff = ap - bp;
if (diff < 0) {
diff = -diff;
}
if (diff < level) {
if (diff > (level >> 1)) {
ap = (ap + ap + bp)/3;
} else {
ap = bp;
}
}
*table++ = ap;
}
}
}
void plugin_but_changed(int but) { }
void plugin_init() { }
void * plugin_seq_alloc_private_data()
{
struct my_data * result = (struct my_data*) calloc(
sizeof(struct my_data), 1);
result->last_cfra = -1;
return result;
}
void plugin_seq_free_private_data(void * data)
{
struct my_data * d = (struct my_data*) data;
if (d->last_frame) {
free(d->last_frame);
}
free(d);
}
void plugin_getinfo(PluginInfo *info) {
info->name= name;
info->nvars= sizeof(varstr)/sizeof(VarStruct);
info->cfra= &cfra;
info->varstr= varstr;
info->init= plugin_init;
info->seq_doit= (SeqDoit) plugin_seq_doit;
info->callback= plugin_but_changed;
}
static void doit(unsigned char * src_, unsigned char * dst_,
unsigned char * table, int width, int height)
{
int count = width * height;
unsigned char * src = src_;
unsigned char * dst = dst_;
while (count--) {
*dst = table[(*src++ << 8) | *dst]; dst++;
*dst = table[(*src++ << 8) | *dst]; dst++;
*dst = table[(*src++ << 8) | *dst]; dst++;
*dst++ = *src++;
}
memcpy(src_, dst_, width * height * 4);
}
void plugin_seq_doit(Cast *cast, float facf0, float facf1, int width,
int height, ImBuf *ibuf1, ImBuf *ibuf2, ImBuf *out, ImBuf *use) {
struct my_data * d = (struct my_data*) plugin_private_data;
if (!ibuf1) return;
if (cast->level != d->last_level) {
precalculate(d->lookup_table, cast->level);
d->last_level = cast->level;
}
if (width != d->last_width || height != d->last_height
|| cfra != d->last_cfra + 1) {
free(d->last_frame);
d->last_frame = (unsigned char*) calloc(width * height, 4);
d->last_width = width;
d->last_height = height;
}
memcpy(out->rect, ibuf1->rect, width * height * 4);
doit((unsigned char*) out->rect,
d->last_frame, d->lookup_table, width, height);
d->last_cfra = cfra;
}
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