1 files changed, 149 insertions, 0 deletions
diff --git a/release/plugins/sequence/dnr.c b/release/plugins/sequence/dnr.c
new file mode 100644
index 00000000000..7e7c168750e
--- /dev/null
+++ b/release/plugins/sequence/dnr.c
@@ -0,0 +1,149 @@
+/*
+ * 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++ = table[(*src++ << 8) | *dst];
+		*dst++ = table[(*src++ << 8) | *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;
+}