diff options
| author | Harald Welte <laforge@gnumonks.org> | 2011-07-04 20:52:54 +0200 |
|---|---|---|
| committer | Harald Welte <laforge@gnumonks.org> | 2011-07-04 20:52:54 +0200 |
| commit | 044ad7c3987460ede48ff27afd6bdb0ca05a0432 (patch) | |
| tree | 924818cdb0d39ca08aec540d18da7bd406eaae8c /utility/video.c | |
import at91lib from at91lib_20100901_softpack_1_9_v_1_0_svn_v1501120100901_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
Diffstat (limited to 'utility/video.c')
| -rw-r--r-- | utility/video.c | 130 |
1 files changed, 130 insertions, 0 deletions
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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