DM8148 arm 端采集与显示程序设计记录
来源：互联网 发布：c语言位运算判断奇偶 编辑：程序博客网 时间：2024/06/02 13:33
/* * * * * * * * *//* * WARNING: This is just a test application. Don't fill bug reports, flame me, * curse me on 7 generations :-). */extern "C"{#include <stdio.h>#include <string.h>#include <fcntl.h>#include <unistd.h>#include <stdint.h>#include <stdlib.h>#include <errno.h>#include <getopt.h>#include <sys/ioctl.h>#include <sys/mman.h>#include <sys/select.h>#include <sys/time.h> #include <linux/fb.h> #include <linux/videodev.h>}#include "opencv/highgui.h"#include "opencv/cv.h"#include "opencv/cxcore.h"#include "opencv/cvaux.h"#include "video_cap.h"#include "displayFb.h"int main( int argc, char** argv ){ //声明IplImage指针 IplImage* pImg = NULL; IplImage* pCannyImg = NULL; IplImage* pGRAYImg = NULL; VideoDevice * m_pVideoDev = new VideoDevice; //载入图像，强制转化为Gray // if( argc == 2 ) { if((pImg = cvLoadImage("lena.bmp")) != NULL ){ unsigned char * image = (unsigned char * )pImg->imageData; //为canny边缘图像申请空间 pCannyImg = cvCreateImage(cvGetSize(pImg), IPL_DEPTH_8U, 1); pGRAYImg= cvCreateImage(cvGetSize(pImg), IPL_DEPTH_8U, 1); //canny边缘检测 cvCvtColor(pImg,pGRAYImg,CV_RGB2GRAY); cvCanny(pGRAYImg, pCannyImg, 50, 150, 3); //for(int i=0; i< ) for(int h = 0; h < (pImg->height-1)/2; h++) for(int w = 0; w < (pImg->width-1)/2; w++) { image[h*(pImg->width)*3+3*w+0] = 255; image[h*(pImg->width)*3+3*w+1] = 255; image[h*(pImg->width)*3+3*w+2] = 255; } cvSaveImage("dd.bmp",pImg); cvSaveImage("cc.bmp",pCannyImg); //创建窗口 // cvNamedWindow("src", 1); // cvNamedWindow("canny",1); //显示图像 // cvShowImage( "src", pImg ); // cvShowImage( "canny", pCannyImg ); //cvWaitKey(0); //等待按键 //销毁窗口 // cvDestroyWindow( "src" ); // cvDestroyWindow( "canny" ); //释放图像 cvReleaseImage( &pImg ); cvReleaseImage( &pCannyImg ); cvReleaseImage( &pGRAYImg ); goto end; } else { goto end; } } end: delete [] m_pVideoDev; return -1;}以上的主程序
采集部分usb：
头文件
#ifndef VIDEO_CAP_H#define VIDEO_CAP_Hextern "C"{#include <string.h>#include <stdlib.h>#include <errno.h>#include <fcntl.h>#include <sys/ioctl.h>#include <sys/mman.h>#include <stdio.h>#include <string.h>#include <fcntl.h>#include <unistd.h>#include <stdint.h>#include <stdlib.h>#include <errno.h>#include <getopt.h>#include <sys/ioctl.h>#include <sys/mman.h>#include <sys/select.h>#include <sys/time.h> #include <linux/fb.h> #include <linux/videodev.h>}#include <asm/types.h>#include <linux/videodev2.h>#define NUM_OF_BUF 2#define WIDTH 320#define HEIGHT 240#define IMAGE_SIZE_OF_CAM (WIDTH * HEIGHT *2)#define CLEAR(x) memset(&(x), 0, sizeof(x))static const signed short redAdjust[] = {-161,-160,-159,-158,-157,-156,-155,-153,-152,-151,-150,-149,-148,-147,-145,-144,-143,-142,-141,-140,-139,-137,-136,-135,-134,-133,-132,-131,-129,-128,-127,-126,-125,-124,-123,-122,-120,-119,-118,-117,-116,-115,-114,-112,-111,-110,-109,-108,-107,-106,-104,-103,-102,-101,-100, -99,-98, -96, -95, -94, -93, -92, -91, -90,-88, -87, -86, -85, -84, -83, -82, -80,-79, -78, -77, -76, -75, -74, -72, -71,-70, -69, -68, -67, -66, -65, -63, -62,-61, -60, -59, -58, -57, -55, -54, -53,-52, -51, -50, -49, -47, -46, -45, -44,-43, -42, -41, -39, -38, -37, -36, -35,-34, -33, -31, -30, -29, -28, -27, -26,-25, -23, -22, -21, -20, -19, -18, -17,-16, -14, -13, -12, -11, -10, -9, -8,-6, -5, -4, -3, -2, -1, 0, 1,2, 3, 4, 5, 6, 7, 9, 10,11, 12, 13, 14, 15, 17, 18, 19,20, 21, 22, 23, 25, 26, 27, 28,29, 30, 31, 33, 34, 35, 36, 37,38, 39, 40, 42, 43, 44, 45, 46,47, 48, 50, 51, 52, 53, 54, 55,56, 58, 59, 60, 61, 62, 63, 64,66, 67, 68, 69, 70, 71, 72, 74,75, 76, 77, 78, 79, 80, 82, 83,84, 85, 86, 87, 88, 90, 91, 92,93, 94, 95, 96, 97, 99, 100, 101,102, 103, 104, 105, 107, 108, 109, 110,111, 112, 113, 115, 116, 117, 118, 119,120, 121, 123, 124, 125, 126, 127, 128,};static const signed short greenAdjust1[] = {34, 34, 33, 33, 32, 32, 32, 31,31, 30, 30, 30, 29, 29, 28, 28,28, 27, 27, 27, 26, 26, 25, 25,25, 24, 24, 23, 23, 23, 22, 22,21, 21, 21, 20, 20, 19, 19, 19,18, 18, 17, 17, 17, 16, 16, 15,15, 15, 14, 14, 13, 13, 13, 12,12, 12, 11, 11, 10, 10, 10, 9,9, 8, 8, 8, 7, 7, 6, 6,6, 5, 5, 4, 4, 4, 3, 3,2, 2, 2, 1, 1, 0, 0, 0,0, 0, -1, -1, -1, -2, -2, -2,-3, -3, -4, -4, -4, -5, -5, -6,-6, -6, -7, -7, -8, -8, -8, -9,-9, -10, -10, -10, -11, -11, -12, -12,-12, -13, -13, -14, -14, -14, -15, -15,-16, -16, -16, -17, -17, -17, -18, -18,-19, -19, -19, -20, -20, -21, -21, -21,-22, -22, -23, -23, -23, -24, -24, -25,-25, -25, -26, -26, -27, -27, -27, -28,-28, -29, -29, -29, -30, -30, -30, -31,-31, -32, -32, -32, -33, -33, -34, -34,-34, -35, -35, -36, -36, -36, -37, -37,-38, -38, -38, -39, -39, -40, -40, -40,-41, -41, -42, -42, -42, -43, -43, -44,-44, -44, -45, -45, -45, -46, -46, -47,-47, -47, -48, -48, -49, -49, -49, -50,-50, -51, -51, -51, -52, -52, -53, -53,-53, -54, -54, -55, -55, -55, -56, -56,-57, -57, -57, -58, -58, -59, -59, -59,-60, -60, -60, -61, -61, -62, -62, -62,-63, -63, -64, -64, -64, -65, -65, -66,};static const signed short greenAdjust2[] = {74, 73, 73, 72, 71, 71, 70, 70,69, 69, 68, 67, 67, 66, 66, 65,65, 64, 63, 63, 62, 62, 61, 60,60, 59, 59, 58, 58, 57, 56, 56,55, 55, 54, 53, 53, 52, 52, 51,51, 50, 49, 49, 48, 48, 47, 47,46, 45, 45, 44, 44, 43, 42, 42,41, 41, 40, 40, 39, 38, 38, 37,37, 36, 35, 35, 34, 34, 33, 33,32, 31, 31, 30, 30, 29, 29, 28,27, 27, 26, 26, 25, 24, 24, 23,23, 22, 22, 21, 20, 20, 19, 19,18, 17, 17, 16, 16, 15, 15, 14,13, 13, 12, 12, 11, 11, 10, 9,9, 8, 8, 7, 6, 6, 5, 5,4, 4, 3, 2, 2, 1, 1, 0,0, 0, -1, -1, -2, -2, -3, -4,-4, -5, -5, -6, -6, -7, -8, -8,-9, -9, -10, -11, -11, -12, -12, -13,-13, -14, -15, -15, -16, -16, -17, -17,-18, -19, -19, -20, -20, -21, -22, -22,-23, -23, -24, -24, -25, -26, -26, -27,-27, -28, -29, -29, -30, -30, -31, -31,-32, -33, -33, -34, -34, -35, -35, -36,-37, -37, -38, -38, -39, -40, -40, -41,-41, -42, -42, -43, -44, -44, -45, -45,-46, -47, -47, -48, -48, -49, -49, -50,-51, -51, -52, -52, -53, -53, -54, -55,-55, -56, -56, -57, -58, -58, -59, -59,-60, -60, -61, -62, -62, -63, -63, -64,-65, -65, -66, -66, -67, -67, -68, -69,-69, -70, -70, -71, -71, -72, -73, -73,};static const signed short blueAdjust[] = {-276,-274,-272,-270,-267,-265,-263,-261,-259,-257,-255,-253,-251,-249,-247,-245,-243,-241,-239,-237,-235,-233,-231,-229,-227,-225,-223,-221,-219,-217,-215,-213,-211,-209,-207,-204,-202,-200,-198,-196,-194,-192,-190,-188,-186,-184,-182,-180,-178,-176,-174,-172,-170,-168,-166,-164,-162,-160,-158,-156,-154,-152,-150,-148,-146,-144,-141,-139,-137,-135,-133,-131,-129,-127,-125,-123,-121,-119,-117,-115,-113,-111,-109,-107,-105,-103,-101, -99,-97, -95, -93, -91, -89, -87, -85, -83,-81, -78, -76, -74, -72, -70, -68, -66,-64, -62, -60, -58, -56, -54, -52, -50,-48, -46, -44, -42, -40, -38, -36, -34,-32, -30, -28, -26, -24, -22, -20, -18,-16, -13, -11, -9, -7, -5, -3, -1,0, 2, 4, 6, 8, 10, 12, 14,16, 18, 20, 22, 24, 26, 28, 30,32, 34, 36, 38, 40, 42, 44, 46,49, 51, 53, 55, 57, 59, 61, 63,65, 67, 69, 71, 73, 75, 77, 79,81, 83, 85, 87, 89, 91, 93, 95,97, 99, 101, 103, 105, 107, 109, 112,114, 116, 118, 120, 122, 124, 126, 128,130, 132, 134, 136, 138, 140, 142, 144,146, 148, 150, 152, 154, 156, 158, 160,162, 164, 166, 168, 170, 172, 175, 177,179, 181, 183, 185, 187, 189, 191, 193,195, 197, 199, 201, 203, 205, 207, 209,211, 213, 215, 217, 219, 221, 223, 225,227, 229, 231, 233, 235, 238, 240, 242,};#define SIZE 256#define XSIZE 320#define YSIZE 240#define IMGSIZE XSIZE * YSIZEtypedef struct RGB{unsigned char r;unsigned char g;unsigned char b;}RGB;class VideoDevice { public: VideoDevice(); //VideoDevice(); int open_device(char * dev_name); int close_device(); int init_device(); int start_capturing(); int stop_capturing(); int uninit_device(); int get_frame(void **, size_t*); int unget_frame();public: inline void yuv_to_rgb24_N(unsigned char y, unsigned char u, unsigned char v, unsigned char *rgb); void YUVToRGB24_N(unsigned char *buf, unsigned char *rgb, int width, int height); void YUVToRGB24_8_N(unsigned char *buf, unsigned char *rgb, int width, int height); void rgb24_to_rgb565_N(unsigned char *rgb24, unsigned char *rgb16, int width, int height); void rgb24_to_rgb565_6_N(unsigned char *rgb24, unsigned char *rgb16, int width, int height); int convert_yuv_to_rgb_pixel_N(int y, int u, int v); int convert_yuv_to_rgb_buffer_N(unsigned char *yuv, unsigned char *rgb,unsigned int width, unsigned int height); int yuv_to_rgb16_N(unsigned char y,unsigned char u,unsigned char v,unsigned char * rgb); int convert_m_N(unsigned char * buf,unsigned char * rgb,int width,int height); inline void yuv2rgb565_N(const int y, const int u, const int v, unsigned short &rgb565); void ConvertYUYVtoRGB565_N(const void *yuyv_data, void *rgb565_data,const unsigned int w, const unsigned int h); void table_init_N(); inline void calc_lum_N();private: int init_mmap(); struct buffer { void * start; size_t length; }; int fd; buffer* buffers; unsigned int n_buffers; int index;};#endif // VIDEO_CAP_H源文件：#include "video_cap.h"VideoDevice::VideoDevice(){ // this->dev_name = dev_name; this->fd = -1; this->buffers = NULL; this->n_buffers = 0; this->index = -1;}int VideoDevice::open_device(char * dev_name){ fd = open(dev_name, O_RDWR/*|O_NONBLOCK*/, 0); // fd = open(dev_name.toStdString().c_str(), O_RDWR|O_NONBLOCK, 0); if(-1 == fd) { //emit display_error(tr("open: %1").arg(QString(strerror(errno)))); return -1; } return 0;}int VideoDevice::close_device(){ if(-1 == close(fd)) { // emit display_error(tr("close: %1").arg(QString(strerror(errno)))); return -1; } return 0;}int VideoDevice::init_device(){ v4l2_capability cap; v4l2_cropcap cropcap; v4l2_crop crop; v4l2_format fmt; if(-1 == ioctl(fd, VIDIOC_QUERYCAP, &cap)) { if(EINVAL == errno) { // emit display_error(tr("%1 is no V4l2 device").arg(dev_name)); } else { //emit display_error(tr("VIDIOC_QUERYCAP: %1").arg(QString(strerror(errno)))); } return -1; } if(!(cap.capabilities & V4L2_CAP_VIDEO_CAPTURE)) { // emit display_error(tr("%1 is no video capture device").arg(dev_name)); return -1; } if(!(cap.capabilities & V4L2_CAP_STREAMING)) { //emit display_error(tr("%1 does not support streaming i/o").arg(dev_name)); return -1; } CLEAR(fmt); fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; fmt.fmt.pix.width = WIDTH; fmt.fmt.pix.height = HEIGHT; fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV; fmt.fmt.pix.field = V4L2_FIELD_INTERLACED;#if 1 if(-1 == ioctl(fd, VIDIOC_S_FMT, &fmt)) { //emit display_error(tr("VIDIOC_S_FMT").arg(QString(strerror(errno)))); return -1; }#endif if(-1 == init_mmap()) { return -1; } return 0;}int VideoDevice::init_mmap(){ v4l2_requestbuffers req; CLEAR(req); //NUM_OF_BUF //req.count = 4; req.count = NUM_OF_BUF; req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; req.memory = V4L2_MEMORY_MMAP; if(-1 == ioctl(fd, VIDIOC_REQBUFS, &req)) { if(EINVAL == errno) { //emit display_error(tr("%1 does not support memory mapping").arg(dev_name)); return -1; } else { // emit display_error(tr("VIDIOC_REQBUFS %1").arg(QString(strerror(errno)))); return -1; } } if(req.count < 2) { //emit display_error(tr("Insufficient buffer memory on %1").arg(dev_name)); return -1; } buffers = (buffer*)calloc(req.count, sizeof(*buffers)); if(!buffers) { //emit display_error(tr("out of memory")); return -1; } for(n_buffers = 0; n_buffers < req.count; ++n_buffers) { v4l2_buffer buf; CLEAR(buf); buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; buf.memory = V4L2_MEMORY_MMAP; buf.index = n_buffers; if(-1 == ioctl(fd, VIDIOC_QUERYBUF, &buf)) { //emit display_error(tr("VIDIOC_QUERYBUF: %1").arg(QString(strerror(errno)))); return -1; } buffers[n_buffers].length = buf.length; buffers[n_buffers].start = mmap(NULL, // start anywhere buf.length, PROT_READ | PROT_WRITE, MAP_SHARED, fd, buf.m.offset); if(MAP_FAILED == buffers[n_buffers].start) { //emit display_error(tr("mmap %1").arg(QString(strerror(errno)))); return -1; } } return 0;}int VideoDevice::start_capturing(){ unsigned int i; for(i = 0; i < n_buffers; ++i) { v4l2_buffer buf; CLEAR(buf); buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; buf.memory =V4L2_MEMORY_MMAP; buf.index = i; // fprintf(stderr, "n_buffers: %d\n", i); if(-1 == ioctl(fd, VIDIOC_QBUF, &buf)) { //emit display_error(tr("VIDIOC_QBUF: %1").arg(QString(strerror(errno)))); return -1; } } v4l2_buf_type type; type = V4L2_BUF_TYPE_VIDEO_CAPTURE; if(-1 == ioctl(fd, VIDIOC_STREAMON, &type)) { //emit display_error(tr("VIDIOC_STREAMON: %1").arg(QString(strerror(errno)))); return -1; } return 0;}int VideoDevice::stop_capturing(){ v4l2_buf_type type; type = V4L2_BUF_TYPE_VIDEO_CAPTURE; if(-1 == ioctl(fd, VIDIOC_STREAMOFF, &type)) { //emit display_error(tr("VIDIOC_STREAMOFF: %1").arg(QString(strerror(errno)))); return -1; } return 0;}int VideoDevice::uninit_device(){ unsigned int i; for(i = 0; i < n_buffers; ++i) { if(-1 == munmap(buffers[i].start, buffers[i].length)) { // emit display_error(tr("munmap: %1").arg(QString(strerror(errno)))); return -1; } } free(buffers); return 0;}int VideoDevice::get_frame(void **frame_buf, size_t* len){ v4l2_buffer queue_buf; CLEAR(queue_buf); queue_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; queue_buf.memory = V4L2_MEMORY_MMAP; if(-1 == ioctl(fd, VIDIOC_DQBUF, &queue_buf)) { switch(errno) { case EAGAIN: // perror("dqbuf"); return -1; case EIO: return -1 ; default: // emit display_error(tr("VIDIOC_DQBUF: %1").arg(QString(strerror(errno)))); return -1; } } *frame_buf = buffers[queue_buf.index].start; *len = buffers[queue_buf.index].length; index = queue_buf.index; return 0;}int VideoDevice::unget_frame(){ if(index != -1) { v4l2_buffer queue_buf; CLEAR(queue_buf); queue_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; queue_buf.memory = V4L2_MEMORY_MMAP; queue_buf.index = index; if(-1 == ioctl(fd, VIDIOC_QBUF, &queue_buf)) { //emit display_error(tr("VIDIOC_QBUF: %1").arg(QString(strerror(errno)))); return -1; } return 0; } return -1;}RGB in[IMGSIZE]; //需要计算的原始数据unsigned char out[IMGSIZE * 3]; //计算后的结果 unsigned short Y_R[SIZE],Y_G[SIZE],Y_B[SIZE]; unsigned short U_R[SIZE],U_G[SIZE],U_B[SIZE]; unsigned short V_R[SIZE],V_G[SIZE],V_B[SIZE]; //查表数组 inline void VideoDevice::yuv_to_rgb24_N(unsigned char y, unsigned char u, unsigned char v, unsigned char *rgb) { register int r, g, b; r = (1192 * (y - 16) + 1634 * (v - 128)) >> 10; g = (1192 * (y - 16) - 833 * (v - 128) - 400 * (u - 128)) >> 10; b = (1192 * (y - 16) + 2066 * (u - 128)) >> 10; r = r > 255 ? 255 : r < 0 ? 0 : r; g = g > 255 ? 255 : g < 0 ? 0 : g; b = b > 255 ? 255 : b < 0 ? 0 : b; *rgb = r; rgb++; *rgb = g; rgb++; *rgb = b;#if 0 rgb16 = (int) (((r >> 3) << 11) | ((g >> 2) << 5) | ((b >> 3) << 0)); *rgb = (unsigned char) (rgb16 & 0xFF); rgb++; *rgb = (unsigned char) ((rgb16 & 0xFF00) >> 8);#endif} void VideoDevice::YUVToRGB24_N(unsigned char *buf, unsigned char *rgb, int width, int height) { int y = 0; int blocks; blocks = (width * height) * 2; int j = 0; for (y = 0; y < blocks; y += 4) { unsigned char Y1, Y2, U1, V1; Y1 = buf[y + 0]; U1 = buf[y + 1]; Y2 = buf[y + 2]; V1 = buf[y + 3]; yuv_to_rgb24_N(Y1, U1, V1, &rgb[j]); yuv_to_rgb24_N(Y2, U1, V1, &rgb[j + 3]); j +=6; }} void VideoDevice::YUVToRGB24_8_N(unsigned char *buf, unsigned char *rgb, int width, int height) { int y = 0; int blocks; blocks = (width * height) * 2; int j = 0; for (y = 0; y < blocks; y += 8) { unsigned char Y1, Y2, U1, V1; unsigned char Y1_1, Y2_1, U1_1, V1_1; Y1 = buf[y + 0]; U1 = buf[y + 1]; Y2 = buf[y + 2]; V1 = buf[y + 3]; // V1 = buf[y + 1]; //U1 = buf[y + 3]; Y1_1 = buf[y + 4]; U1_1 = buf[y + 5]; Y2_1 = buf[y + 6]; V1_1 = buf[y + 7]; // V1_1 = buf[y + 7]; // U1_1 = buf[y + 5]; yuv_to_rgb24_N(Y1, U1, V1, &rgb[j]); yuv_to_rgb24_N(Y2, U1, V1, &rgb[j + 3]); yuv_to_rgb24_N(Y1_1, U1_1, V1_1, &rgb[j + 6]); yuv_to_rgb24_N(Y2_1, U1_1, V1_1, &rgb[j + 9]); j +=12; }} void VideoDevice::rgb24_to_rgb565_N(unsigned char *rgb24, unsigned char *rgb16, int width, int height){ int i = 0, j = 0; for (i = 0; i < width*height*3; i += 3) { rgb16[j] = rgb24[i] >> 3; // B rgb16[j] |= ((rgb24[i+1] & 0x1C) << 3); // G rgb16[j+1] = rgb24[i+2] & 0xF8; // R rgb16[j+1] |= (rgb24[i+1] >> 5); // G j += 2; }} void VideoDevice::rgb24_to_rgb565_6_N(unsigned char *rgb24, unsigned char *rgb16, int width, int height){ int i = 0, j = 0; for (i = 0; i < width*height*3; i += 6) { rgb16[j] = rgb24[i] >> 3; // B rgb16[j] |= ((rgb24[i+1] & 0x1C) << 3); // G rgb16[j+1] = rgb24[i+2] & 0xF8; // R rgb16[j+1] |= (rgb24[i+1] >> 5); // G rgb16[j+2] = rgb24[i+3] >> 3; // B rgb16[j+2] |= ((rgb24[i+4] & 0x1C) << 3); // G rgb16[j+3] = rgb24[i+5] & 0xF8; // R rgb16[j+3] |= (rgb24[i+4] >> 5); // G j += 4; }} int VideoDevice::convert_yuv_to_rgb_pixel_N(int y, int u, int v){ unsigned int pixel32 = 0; unsigned char *pixel = (unsigned char *)&pixel32; int r, g, b; r = y + (1.370705 * (v-128)); g = y - (0.698001 * (v-128)) - (0.337633 * (u-128)); b = y + (1.732446 * (u-128)); if(r > 255) r = 255; if(g > 255) g = 255; if(b > 255) b = 255; if(r < 0) r = 0; if(g < 0) g = 0; if(b < 0) b = 0; pixel[0] = r * 220 / 256; pixel[1] = g * 220 / 256; pixel[2] = b * 220 / 256; return pixel32;}/*yuv格式转换为rgb格式*/ int VideoDevice::convert_yuv_to_rgb_buffer_N(unsigned char *yuv, unsigned char *rgb, unsigned int width, unsigned int height){ unsigned int in, out = 0; unsigned int pixel_16; unsigned char pixel_24[3]; unsigned int pixel32; int y0, u, y1, v; for(in = 0; in < width * height * 2; in += 4) { pixel_16 = yuv[in + 3] << 24 | yuv[in + 2] << 16 | yuv[in + 1] << 8 | yuv[in + 0]; y0 = (pixel_16 & 0x000000ff); u = (pixel_16 & 0x0000ff00) >> 8; y1 = (pixel_16 & 0x00ff0000) >> 16; v = (pixel_16 & 0xff000000) >> 24; pixel32 = convert_yuv_to_rgb_pixel_N(y0, u, v); pixel_24[0] = (pixel32 & 0x000000ff); pixel_24[1] = (pixel32 & 0x0000ff00) >> 8; pixel_24[2] = (pixel32 & 0x00ff0000) >> 16; rgb[out++] = pixel_24[0]; rgb[out++] = pixel_24[1]; rgb[out++] = pixel_24[2]; pixel32 = convert_yuv_to_rgb_pixel_N(y1, u, v); pixel_24[0] = (pixel32 & 0x000000ff); pixel_24[1] = (pixel32 & 0x0000ff00) >> 8; pixel_24[2] = (pixel32 & 0x00ff0000) >> 16; rgb[out++] = pixel_24[0]; rgb[out++] = pixel_24[1]; rgb[out++] = pixel_24[2]; } return 0;} int VideoDevice::yuv_to_rgb16_N(unsigned char y,unsigned char u,unsigned char v,unsigned char * rgb){ register int r,g,b; int rgb16; r = (1192 * (y - 16) + 1634 * (v - 128) ) >> 10; g = (1192 * (y - 16) - 833 * (v - 128) - 400 * (u -128) ) >> 10; b = (1192 * (y - 16) + 2066 * (u - 128) ) >> 10; r = r > 255 ? 255 : r < 0 ? 0 : r; g = g > 255 ? 255 : g < 0 ? 0 : g; b = b > 255 ? 255 : b < 0 ? 0 : b; rgb16 = (int)(((r >> 3)<<11) | ((g >> 2) << 5)| ((b >> 3) << 0)); *rgb = (unsigned char)(rgb16 & 0xFF); rgb++; *rgb = (unsigned char)((rgb16 & 0xFF00) >> 8); return 0;} int VideoDevice::convert_m_N(unsigned char * buf,unsigned char * rgb,int width,int height){ int y=0; int blocks; blocks = (width * height) * 2; for (y = 0; y < blocks; y+=4) { unsigned char Y1, Y2, U, V; /////////////////////////////////////// Y1 = buf[y + 0]; U = buf[y + 1]; Y2 = buf[y + 2]; V = buf[y + 3]; ////////////////////////////////////// yuv_to_rgb16_N(Y1, U, V, &rgb[y]); yuv_to_rgb16_N(Y2, U, V, &rgb[y + 2]); //yuv_to_rgb16(Y1, 0x80, 0x80, &rgb[y]); //yuv_to_rgb16(Y2, 0x80, 0x80, &rgb[y + 2]); } return 0;}/*yuv格式转换为rgb格式*/ inline void VideoDevice::yuv2rgb565_N(const int y, const int u, const int v, unsigned short &rgb565){ int r, g, b; r = y + redAdjust[v]; g = y + greenAdjust1[u] + greenAdjust2[v]; b = y + blueAdjust[u];#define CLAMP(x) if (x < 0) x = 0 ; else if (x > 255) x = 255 CLAMP(r); CLAMP(g); CLAMP(b);#undef CLAMP rgb565 = (unsigned short)(((r >> 3) << 11) | ((g >> 2) << 5) | (b >> 3));} void VideoDevice::ConvertYUYVtoRGB565_N(const void *yuyv_data, void *rgb565_data, const unsigned int w, const unsigned int h){ const unsigned char *src = (unsigned char *)yuyv_data; unsigned short *dst = (unsigned short *)rgb565_data; for (unsigned int i = 0, j = 0; i < w * h * 2; i += 4, j += 2) { int y, u, v; unsigned short rgb565; y = src[i + 0]; u = src[i + 1]; v = src[i + 3]; yuv2rgb565_N(y, u, v, rgb565); dst[j + 0] = rgb565; y = src[i + 2]; yuv2rgb565_N(y, u, v, rgb565); dst[j + 1] = rgb565; }} void VideoDevice::table_init_N(){ int i; for(i = 0; i < SIZE; i++) { Y_R[i] = (i * 1224) >> 12; //Y对应的查表数组 Y_G[i] = (i * 2404) >> 12; Y_B[i] = (i * 467) >> 12; U_R[i] = (i * 602) >> 12; //U对应的查表数组 U_G[i] = (i * 1183) >> 12; U_B[i] = (i * 1785) >> 12; V_R[i] = (i * 2519) >> 12; //V对应的查表数组 V_G[i] = (i * 2109) >> 12; V_B[i] = (i * 409) >> 12; }} inline void VideoDevice::calc_lum_N(){ int i; for(i = 0; i < IMGSIZE; i += 2) //一次并行处理2个数据 { out[i] = Y_R[in[i].r] + Y_G[in[i].g] + Y_B[in[i].b]; //Y out[i + IMGSIZE] = U_B[in[i].b] - U_R[in[i].r] - U_G[in[i].g]; //U out[i + 2 * IMGSIZE] = V_R[in[i].r] - V_G[in[i].g] - V_B[in[i].b]; //V out[i + 1] = Y_R[in[i + 1].r] + Y_G[in[i + 1].g] + Y_B[in[i + 1].b]; //Y out[i + 1 + IMGSIZE] = U_B[in[i + 1].b] - U_R[in[i + 1].r] - U_G[in[i + 1].g]; //U out[i + 1 + 2 * IMGSIZE] = V_R[in[i + 1].r] - V_G[in[i + 1].g] - V_B[in[i + 1].b]; //V }}makefile：
#LIB = -L/usr/lib/mysql -lmysqlclient -L./ -lcfg#INCLUDE = -I/usr/include/mysql #LIB = -L/home/omap/omap3530/dvsdk/dvsdk_3_00_02_44/linuxlibs/lib -ljpeg#INCLUDE = -I/home/omap/omap3530/dvsdk/dvsdk_3_00_02_44/linuxlibs/include#LIB = -L/home/omap/lib -ljpeg#INCLUDE = -I/home/omap/work/opencv/build/include#ROOTDIR = .KERNEL_DIR =/opt/DM8148/ezsdk/board-support/linux-2.6.37-psp04.04.00.01#This is root directory where Source is available. Change this path#to the one where source files are keptINSTALL_DIR = ./#this is the path to the executable where all the executables are keptEXE_DIR = ./bin#This is path to the Include files of Library#LIB_INC = $(INSTALL_DIR)/User_Library#This is the path the include folder of the kernel directory. The include#folder should contain all the necessary header filesINCLUDE_DIR = $(KERNEL_DIR)/include -I$(KERNEL_DIR)/arch/arm/include/ -I$(KERNEL_DIR)/arch/arm/plat-omap/include/#This is the prefix applied to the gcc when compiling applications and libraryCOMPILER_PREFIX = arm-none-linux-gnueabiCROSS_COMPILE = $(COMPILER_PREFIX)-#This is the toolchain base folder#TOOLCHAIN_DIR = /opt/codesourcery/2009q1-203TOOLCHAIN_DIR = /opt/DM8148/arm-2009q1#add cflagsCPPFLAGS += -march=armv7-a -mcpu=cortex-a8 -mfpu=neon -mfloat-abi=softfpCPPFLAGS += -I$(TOOLCHAIN_DIR)/$(COMPILER_PREFIX)/libc/usr/include -I$(KERNEL_DIR)#Libc pathLDFLAGS="-isystem $(TOOLCHAIN_DIR)/$(COMPILER_PREFIX)/libc/lib"#This is the path to the Directory containing LibraryLIB_DIR = $(TOOLCHAIN_DIR)/$(COMPILER_PREFIX)/libc/libCFLAGS = -g -Os \-march=armv7-a \-fno-strict-aliasing \-fno-common \-ffixed-r8 \-msoft-float \-I$(INCLUDE_DIR) \-pipe \-mno-thumb-interwork \-Wall \-Wstrict-prototypes \-fno-stack-protector \ -D__EXPORTED_HEADERS__#LDFLAGS = -L/opt/codesourcery/arm-none-linux-gnueabi/libc/libLDFLAGS = -L/opt/DM8148/arm-2009q1/arm-none-linux-gnueabi/libc/libLIBS := -lpthread## Platform specific options#CFLAGS += -DCONFIG_TI81XX#$(CROSS_COMPILE)gcc $(CFLAGS) $(LDFLAGS) $(LIBS) -o $@ $(addsuffix .c,${@F})#CC =/opt/DM8148/arm-2009q1/bin/arm-none-linux-gnueabi-gccOPENCV2_2_INCLUDE_FILE=/opt/DM8148/opencv/opencv8148/include/OPENCV2_2_LIB_FILE=/opt/DM8148/opencv/opencv8148/libINCLUDE=-I$(OPENCV2_2_INCLUDE_FILE)LIB+=-L$(OPENCV2_2_LIB_FILE) -lopencv_core -lopencv_ml -lopencv_highgui -lopencv_objdetect -lopencv_imgprocCPPFLAG=-Wall -O2 -g -I$(OPENCV2_2_INCLUDE_FILE)TARGET = exeSRC = $(wildcard *.cpp *.o)OBJ = $(patsubst %.cpp, %.o, $(SRC))%.o : %.c, %.h$(CROSS_COMPILE)gcc -c $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) $(LIBS) $< -o $@%.o : %.cpp$(CROSS_COMPILE)gcc -c $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) $(LIBS) $< -o $@$(TARGET) : $(OBJ)$(CROSS_COMPILE)gcc $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) $(LIBS) $^ -o $@ $(INCLUDE) $(LIB).PHONY: cleanclean:$(RM) $(TARGET) $(OBJ)显示头文件：
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