Linux 下V4l2摄像头采集图片，实现yuyv转RGBRGB转BMP，RGB伸缩，RGB转JPEG保存到内存中，JPEG经UDP发送功能

ARM Cortex-A8平台Linux下V4l2摄像头采集图片程序，实现yuyv转RGB,RGB转BMP保存，RGB缩放等功能。利用jpeglib实现RGB转JPEG，并且压缩结果保存至内存中，无需再用文件操作来保存JPEG图片，JPEG经UDP发送至远程服务器端。

#include “v4l2_use.h“
#include “image_process.h“
#include 

extern unsigned char* dest_buffers;
extern unsigned char* rgb_buffers;

extern int numb;

long rgb_to_jpeg（const char *rgb char *jpeg）
{
	long jpeg_size;
	struct jpeg_compress_struct jcs;
	struct jpeg_error_mgr jem;
	JSAMPROW row_pointer[1];
	int row_stride;
	
	jcs.err = jpeg_std_error（&jem）;
	jpeg_create_compress（&jcs）;
	
	jpeg_mem_dest（&jcs jpeg &jpeg_size）;//!!!!!!!!!!!!!!!!!!!!!
	
	jcs.image_width = WIDTH;
	jcs.image_height = HEIGHT;

	jcs.input_components = 3;//1;
	jcs.in_color_space = JCS_RGB;//JCS_GRAYSCALE;

	jpeg_set_defaults（&jcs）;
	jpeg_set_quality（&jcs 180 TRUE）;
	
	jpeg_start_compress（&jcs TRUE）;
	row_stride =jcs.image_width * 3;
	
	while（jcs.next_scanline < jcs.image

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2014-10-27 11:05  v4l2_demo\
     目录           0  2014-10-27 11:05  v4l2_demo\bin\
     文件       27573  2014-10-26 14:09  v4l2_demo\bin\mainapp
     目录           0  2014-10-27 11:05  v4l2_demo\image_process\
     文件        8218  2014-10-26 16:56  v4l2_demo\image_process\image_process.c
     文件          75  2014-10-19 12:26  v4l2_demo\image_process\Makefile
     目录           0  2014-10-27 11:05  v4l2_demo\include\
     文件         356  2014-10-18 09:51  v4l2_demo\include\debug.h
     文件        1075  2014-10-23 16:43  v4l2_demo\include\image_process.h
     文件        1616  2014-10-21 11:37  v4l2_demo\include\jconfig.h
     文件       14581  2014-10-21 11:37  v4l2_demo\include\jerror.h
     文件       12714  2014-10-21 11:37  v4l2_demo\include\jmorecfg.h
     文件       48475  2014-10-21 11:37  v4l2_demo\include\jpeglib.h
     文件         991  2014-10-18 10:27  v4l2_demo\include\lcd.h
     文件        2078  2014-10-26 14:01  v4l2_demo\include\v4l2_use.h
     目录           0  2014-10-27 11:05  v4l2_demo\lcd\
     文件        2374  2014-10-18 19:52  v4l2_demo\lcd\lcd.c
     文件          56  2014-10-19 12:14  v4l2_demo\lcd\Makefile
     目录           0  2014-10-27 11:05  v4l2_demo\main\
     文件         995  2014-10-26 14:22  v4l2_demo\main\main.c
     文件          58  2014-10-19 12:25  v4l2_demo\main\Makefile
     文件         483  2014-10-21 11:45  v4l2_demo\Makefile
     文件         245  2014-10-21 18:30  v4l2_demo\mk.sh
     目录           0  2014-10-27 11:05  v4l2_demo\obj\
     文件        6316  2014-10-26 13:59  v4l2_demo\obj\image_process.o
     文件        3396  2014-10-26 14:03  v4l2_demo\obj\lcd.o
     文件        2388  2014-10-26 14:09  v4l2_demo\obj\main.o
     文件          49  2014-10-19 12:26  v4l2_demo\obj\Makefile
     文件        8228  2014-10-26 14:09  v4l2_demo\obj\v4l2_use.o
     目录           0  2014-10-27 11:05  v4l2_demo\v4l2\
     文件          65  2014-10-19 12:14  v4l2_demo\v4l2\Makefile
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