This commit was manufactured by cvs2svn to create tag 'start'.start

1 files changed, 134 insertions, 0 deletions

diff --git a/libopenjpeg/mct.c b/libopenjpeg/mct.c
new file mode 100644
index 00000000..ef371e92
--- /dev/null
+++ b/libopenjpeg/mct.c
@@ -0,0 +1,134 @@
+/*
+ * Copyright (c) 2001-2002, David Janssens
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "mct.h"
+#include "fix.h"
+
+/* <summary> */
+/* This table contains the norms of the basis function of the reversible MCT. */
+/* </summary> */
+double mct_norms[3] = { 1.732, .8292, .8292 };
+
+/* <summary> */
+/* This table contains the norms of the basis function of the irreversible MCT. */
+/* </summary> */
+double mct_norms_real[3] = { 1.732, 1.805, 1.573 };
+
+/* <summary> */
+/* Foward reversible MCT. */
+/* </summary> */
+void mct_encode(int *c0, int *c1, int *c2, int n)
+{
+	int i;
+	for (i = 0; i < n; i++) {
+		int r, g, b, y, u, v;
+		r = c0[i];
+		g = c1[i];
+		b = c2[i];
+		y = (r + (g << 1) + b) >> 2;
+		u = b - g;
+		v = r - g;
+		c0[i] = y;
+		c1[i] = u;
+		c2[i] = v;
+	}
+}
+
+/* <summary> */
+/* Inverse reversible MCT. */
+/* </summary> */
+void mct_decode(int *c0, int *c1, int *c2, int n)
+{
+	int i;
+	for (i = 0; i < n; i++) {
+		int y, u, v, r, g, b;
+		y = c0[i];
+		u = c1[i];
+		v = c2[i];
+		g = y - ((u + v) >> 2);
+		r = v + g;
+		b = u + g;
+		c0[i] = r;
+		c1[i] = g;
+		c2[i] = b;
+	}
+}
+
+/* <summary> */
+/* Get norm of basis function of reversible MCT. */
+/* </summary> */
+double mct_getnorm(int compno)
+{
+	return mct_norms[compno];
+}
+
+/* <summary> */
+/* Foward irreversible MCT. */
+/* </summary> */
+void mct_encode_real(int *c0, int *c1, int *c2, int n)
+{
+	int i;
+	for (i = 0; i < n; i++) {
+		int r, g, b, y, u, v;
+		r = c0[i];
+		g = c1[i];
+		b = c2[i];
+		y = fix_mul(r, 2449) + fix_mul(g, 4809) + fix_mul(b, 934);
+		u = -fix_mul(r, 1382) - fix_mul(g, 2714) + fix_mul(b, 4096);
+		v = fix_mul(r, 4096) - fix_mul(g, 3430) - fix_mul(b, 666);
+		c0[i] = y;
+		c1[i] = u;
+		c2[i] = v;
+	}
+}
+
+/* <summary> */
+/* Inverse irreversible MCT. */
+/* </summary> */
+void mct_decode_real(int *c0, int *c1, int *c2, int n)
+{
+	int i;
+	for (i = 0; i < n; i++) {
+		int y, u, v, r, g, b;
+		y = c0[i];
+		u = c1[i];
+		v = c2[i];
+		r = y + fix_mul(v, 11485);
+		g = y - fix_mul(u, 2819) - fix_mul(v, 5850);
+		b = y + fix_mul(u, 14516);
+		c0[i] = r;
+		c1[i] = g;
+		c2[i] = b;
+	}
+}
+
+/* <summary> */
+/* Get norm of basis function of irreversible MCT. */
+/* </summary> */
+double mct_getnorm_real(int compno)
+{
+	return mct_norms_real[compno];
+}