arm_colorconv.h

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00001 /*
00002  * ARM assembly optimized color format conversion functions
00003  * (YV12 -> YUY2, YV12 -> some custom YUV420 format used by
00004  * Epson graphics chip in Nokia N800)
00005  *
00006  * Copyright (C) 2007 Siarhei Siamashka <ssvb@users.sourceforge.net>
00007  *
00008  * This library is free software; you can redistribute it and/or
00009  * modify it under the terms of the GNU Lesser General Public License
00010  * version 2.1 as published by the Free Software Foundation.
00011  *
00012  * This library is distributed in the hope that it will be useful, but
00013  * WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
00015  * Lesser General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU Lesser General Public
00018  * License along with this library; if not, write to the Free Software
00019  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
00020  * 02110-1301 USA
00021  */
00022 
00023 #ifndef __ARM_COLORCONV_H__
00024 #define __ARM_COLORCONV_H__
00025 
00026 #include <stdint.h>
00027 
00028 /**
00029  * Convert a line of pixels from YV12 to YUY2 color format
00030  * @param dst   - destination buffer for YUY2 pixel data, it should be 32-bit aligned
00031  * @param src_y - pointer to Y plane
00032  * @param src_u - pointer to U plane
00033  * @param src_v - pointer to V plane
00034  * @param w     - number of pixels to convert (should be multiple of 2)
00035  */
00036 void yv12_to_yuy2_line_arm(uint32_t *dst, const uint16_t *src_y, const uint8_t *src_u, const uint8_t *src_v, int w);
00037 
00038 /**
00039  * Convert a line of pixels from YV12 to YUV420 color format
00040  * @param dst   - destination buffer for YUV420 pixel data, it should be at least 16-bit aligned
00041  * @param src_y - pointer to Y plane
00042  * @param src_c - pointer to chroma plane (U for even lines, V for odd lines)
00043  * @param w     - number of pixels to convert (should be multiple of 4)
00044  */
00045 void yv12_to_yuv420_line_arm(uint16_t *dst, const uint8_t *src_y, const uint8_t *src_c, int w);
00046 
00047 /**
00048  * Convert a line of pixels from YV12 to YUV420 color format
00049  * @param dst   - destination buffer for YUV420 pixel data, it should be at least 16-bit aligned
00050  * @param src_y - pointer to Y plane
00051  * @param src_c - pointer to chroma plane (U for even lines, V for odd lines)
00052  * @param w     - number of pixels to convert (should be multiple of 4)
00053  */
00054 void yv12_to_yuv420_line_armv5(uint16_t *dst, const uint8_t *src_y, const uint8_t *src_c, int w);
00055 
00056 /**
00057  * Convert a line of pixels from YV12 to YUV420 color format
00058  * @param dst   - destination buffer for YUV420 pixel data, it should be at least 16-bit aligned
00059  * @param src_y - pointer to Y plane, it should be 16-bit aligned
00060  * @param src_c - pointer to chroma plane (U for even lines, V for odd lines)
00061  * @param w     - number of pixels to convert (should be multiple of 4)
00062  */
00063 void yv12_to_yuv420_line_armv6(uint16_t *dst, const uint16_t *src_y, const uint8_t *src_c, int w);
00064 
00065 #endif