1 files changed, 71 insertions, 0 deletions
diff --git a/dsp/threshold.c b/dsp/threshold.c
new file mode 100644
index 0000000..f5eb7f1
--- /dev/null
+++ b/dsp/threshold.c
@@ -0,0 +1,71 @@
+/*
+ * OMAP3 DSP sample image threshold algorithm
+ *
+ * Copyright (C) 2010-2011 Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ *
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <stddef.h>
+#include "node.h"
+
+unsigned int threshold_create(void)
+{
+	return 0x8000;
+}
+
+unsigned int threshold_delete(void)
+{
+	return 0x8000;
+}
+
+static void threshold_process(uint16_t *data, unsigned int size)
+{
+	unsigned int i;
+
+	for (i = 0; i < size / 2; ++i)
+		data[i] = data[i] >= 512 ? 1023 : 0;
+}
+
+unsigned int threshold_execute(void *env)
+{
+	unsigned char done = 0;
+	unsigned int size;
+	dsp_msg_t msg;
+	void *buffer;
+
+	while (!done) {
+		NODE_getMsg(env, &msg, (unsigned) -1);
+
+		switch (msg.cmd) {
+		case 0:
+			buffer = (void *)msg.arg_1;
+			size = (unsigned int)msg.arg_2;
+
+			BCACHE_inv(buffer, size, 1);
+			threshold_process(buffer, size);
+			BCACHE_wb(buffer, size, 1);
+
+			NODE_putMsg(env, NULL, &msg, 0);
+			break;
+
+		case 0x80000000:
+			done = 1;
+			break;
+		}
+	}
+
+	return 0x8000;
+}