From 044ad7c3987460ede48ff27afd6bdb0ca05a0432 Mon Sep 17 00:00:00 2001
From: Harald Welte <laforge@gnumonks.org>
Date: Mon, 4 Jul 2011 20:52:54 +0200
Subject: import at91lib from at91lib_20100901_softpack_1_9_v_1_0_svn_v15011

it's sad to see that atmel doesn't publish their svn repo or has
a centralized location or even puts proper version/release info
into the library itself
---
 utility/video.c | 130 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 130 insertions(+)
 create mode 100644 utility/video.c

(limited to 'utility/video.c')

diff --git a/utility/video.c b/utility/video.c
new file mode 100644
index 0000000..d516a1b
--- /dev/null
+++ b/utility/video.c
@@ -0,0 +1,130 @@
+/* ----------------------------------------------------------------------------
+ *         ATMEL Microcontroller Software Support 
+ * ----------------------------------------------------------------------------
+ * Copyright (c) 2008, Atmel Corporation
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * - Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the disclaimer below.
+ *
+ * Atmel's name may not be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
+ * DISCLAIMED. IN NO EVENT SHALL ATMEL 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.
+ * ----------------------------------------------------------------------------
+ */
+
+//------------------------------------------------------------------------------
+//         Headers
+//------------------------------------------------------------------------------
+#include "video.h"
+
+//-----------------------------------------------------------------------------
+/// Conversion YCrCb to RGB:<BR>
+/// R = 1.164(Yi – 16) + 1.596(Cr – 128)<BR>
+/// G = 1.164(Yi – 16) – 0.813(Cr – 128) – 0.391(Cb – 128)<BR>
+/// B = 1.164(Yi – 16) + 2.018(Cb – 128)<BR>
+///
+/// Pixel i+1:<BR>
+/// YCrCb to RGB:<BR>
+/// R = 1.164(Yi+1 – 16) + 1.596(Cr – 128)<BR>
+/// G = 1.164(Yi+1 – 16) – 0.813(Cr – 128) – 0.391(Cb – 128)<BR>
+/// B = 1.164(Yi+1 – 16) + 2.018(Cb – 128)
+/// \param ycc Source buffer (YCC)
+/// \param rgb Destination buffer (RGB)
+/// \param len Length of buffer
+//-----------------------------------------------------------------------------
+void VIDEO_Ycc2Rgb(unsigned char *ycc, unsigned short *rgb, unsigned int len)
+{
+    int r_calc_i;
+    int g_calc_i;
+    int b_calc_i;
+    int r_calc_i_incr;
+    int g_calc_i_incr;
+    int b_calc_i_incr;
+    int cr_i;
+    int y_i;
+    int cb_i;
+    int y_i_incr;
+    int val;
+    int val1;
+    int val2;
+    int val3;
+    int val4;
+    int val5;
+    int i;
+
+    for(i=0; i<len; i++)
+    {
+        cb_i = (int)ycc[4*i];
+        y_i  = (int )ycc[4*i+1];
+        cr_i = (int )ycc[4*i+2];
+        y_i_incr =(int )ycc[4*i+3];
+
+        val  = 1164*(y_i-16);
+        val1 = 1164*(y_i_incr-16);
+        val2 = 1596*(cr_i- 128);
+        val3 =  813*(cb_i-128);
+        val4 =  392*(cr_i-128);
+        val5 = 2017*(cb_i-128);
+
+        r_calc_i = (val + val2)/1000;
+        g_calc_i = (val - val3 - val4)/1000;
+        b_calc_i = (val + val5)/1000;
+        r_calc_i_incr = (val1 + val2)/1000;
+        g_calc_i_incr = (val1 - val3 - val4)/1000;
+        b_calc_i_incr = (val1 + val5)/1000;
+
+        if (r_calc_i < 0)
+            r_calc_i = 0;
+        else if (r_calc_i > 255)
+            r_calc_i = 255;
+
+        if (g_calc_i < 0)
+            g_calc_i = 0;
+        else if (g_calc_i > 255)
+            g_calc_i = 255;
+
+        if (b_calc_i < 0)
+            b_calc_i = 0;
+        else if (b_calc_i > 255)
+            b_calc_i = 255;
+
+        if (r_calc_i_incr < 0)
+            r_calc_i_incr = 0;
+        else if (r_calc_i_incr > 255)
+            r_calc_i_incr = 255;
+
+        if (g_calc_i_incr < 0)
+            g_calc_i_incr = 0;
+        else if (g_calc_i_incr > 255)
+            g_calc_i_incr = 255;
+
+        if (b_calc_i_incr < 0)
+            b_calc_i_incr = 0;
+        else if (b_calc_i_incr > 255)
+            b_calc_i_incr = 255;
+
+        *rgb++ = (((unsigned short )r_calc_i & 0xF8) >> 3)
+               | ((((unsigned short)g_calc_i & 0xF8) >> 3) << 5)
+               | ((((unsigned short)b_calc_i & 0xF8) >> 3) << 10);
+
+        *rgb++ = (((unsigned short )r_calc_i_incr & 0xF8) >> 3)
+               | ((((unsigned short)g_calc_i_incr & 0xF8) >> 3) << 5)
+               | ((((unsigned short)b_calc_i_incr & 0xF8) >> 3) << 10);
+    }
+}
+
-- 
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