diff options
Diffstat (limited to 'nuttx/graphics/nxglib/nxglib_rgb2yuv.c')
-rw-r--r-- | nuttx/graphics/nxglib/nxglib_rgb2yuv.c | 103 |
1 files changed, 0 insertions, 103 deletions
diff --git a/nuttx/graphics/nxglib/nxglib_rgb2yuv.c b/nuttx/graphics/nxglib/nxglib_rgb2yuv.c deleted file mode 100644 index 31eff23fa..000000000 --- a/nuttx/graphics/nxglib/nxglib_rgb2yuv.c +++ /dev/null @@ -1,103 +0,0 @@ -/**************************************************************************** - * graphics/color/nxglib_rgb2yuv.c - * - * Copyright (C) 2008, 2011 Gregory Nutt. All rights reserved. - * Author: Gregory Nutt <gnutt@nuttx.org> - * - * 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. - * 3. Neither the name NuttX nor the names of its contributors may be - * used to endorse or promote products derived from this software - * without specific prior written permission. - * - * 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. - * - ****************************************************************************/ - -/**************************************************************************** - * Included Files - ****************************************************************************/ - -#include <nuttx/config.h> - -#include <stdint.h> -#include <debug.h> -#include <fixedmath.h> - -#include <nuttx/nx/nxglib.h> - -/**************************************************************************** - * Pre-Processor Definitions - ****************************************************************************/ - -#define b16_P0813 0x000014d0 /* 0.0813 */ -#define b16_P1140 0x00001d2f /* 0.1140 */ -#define b16_P1687 0x00002b30 /* 0.1687 */ -#define b16_P2990 0x00004c8b /* 0.2990 */ -#define b16_P3313 0x000054d0 /* 0.3313 */ -#define b16_P4187 0x00006b30 /* 0.4187 */ -#define b16_P5000 0x00008000 /* 0.5000 */ -#define b16_P5870 0x00009646 /* 0.5870 */ -#define b16_128P0 0x00800000 /* 128.0 */ - -/**************************************************************************** - * Private Types - ****************************************************************************/ - -/**************************************************************************** - * Private Function Prototypes - ****************************************************************************/ - -/**************************************************************************** - * Private Data - ****************************************************************************/ - -/**************************************************************************** - * Private Functions - ****************************************************************************/ - -/**************************************************************************** - * Public Functions - ****************************************************************************/ - -/**************************************************************************** - * Name: nxgl_rgb2yuv - * - * Description: - * Convert 8-bit RGB triplet to 8-bit YUV triplet - * - ****************************************************************************/ - -void nxgl_rgb2yuv(uint8_t r, uint8_t g, uint8_t b, - uint8_t *y, uint8_t *u, uint8_t *v) -{ - /* Per the JFIF specification: - * - * Y = (0.2990 * R) + (0.5870 * G) + (0.1140 * B) - * U = 128 - (0.1687 * R) - (0.3313 * G) + (0.5000 * B) - * V = 128 + (0.5000 * R) - (0.4187 * G) - (0.0813 * B); - */ - - *y = (uint8_t)b16toi(b16muli(b16_P2990, r) + b16muli(b16_P5870, g) + b16muli(b16_P1140, b)); - *u = (uint8_t)b16toi(b16_128P0 - b16muli(b16_P1687, r) - b16muli(b16_P3313, g) + b16muli(b16_P5000, b)); - *v = (uint8_t)b16toi(b16_128P0 + b16muli(b16_P5000, r) - b16muli(b16_P4187, g) - b16muli(b16_P0813, b)); -} |