一、配置

进入SDK的tools/iconfigtool/IConfigToolApp目录，执行./IConfigTool指令，进入配置界面：

Config.in 是生成配置界面的文件，Config是需要修改的配置文件，选择之后点击Open。

选择 xburst2系列CPU->X2000系列 CPU->vpu_jpeg_encode(硬件解码):

点击File->save，File->Quit。

 二、代码编写

包含头文件

#include <jpeg-hw.h>

此文件所在目录:\freertos\xburst2\soc-x2000\jpeg_encoder\include

文件类容：

#ifndef __JPEG_HW_H__
#define __JPEG_HW_H__#include <stdint.h>enum helix_raw_format {HELIX_TILE_MODE = 0,HELIX_420P_MODE = 4,HELIX_NV12_MODE = 8,HELIX_NV21_MODE = 12,
};/* JPEG encode quantization table select level */
typedef enum {LOW_QUALITY,MEDIUMS_QUALITY,HIGH_QUALITY,
} QUANT_QUALITY;void* hw_jpeg_encode_init(int width,int height);
void hw_jpeg_encode_deinit(void *handle);
int hw_yuv420_planar_nv12_to_jpeg_frame(void *handle, unsigned char *dst_jpeg_frame, unsigned char *ybuf, unsigned char *uvbuf, int width, int height,  QUANT_QUALITY quality);
int hw_yuv420_planar_nv21_to_jpeg_frame(void *handle, unsigned char *dst_jpeg_frame, unsigned char *ybuf, unsigned char *uvbuf, int width, int height,  QUANT_QUALITY quality);void *JZMalloc(int align, int size);
unsigned int get_phy_addr(unsigned int vaddr);#endif    /* __JPEG_HW_H__ */

参考例程：

\freertos\example\driver\vpu_jpeg_encode_example.c

文件内容：

#include <os.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <include_bin.h>#include <jpeg-hw.h>#define WIDTH (128)
#define HEIGHT (72)// #define YUV_RAWBIN#if defined(YUV_RAWBIN)
#define WIDTH (1280)
#define HEIGHT (720)
// rawbinData, rawbinSize
INCBIN(rawbin, "example/resource/video-1280x720_nv12.yuv");
#endifstatic int dump_framebuffer_hex(unsigned char *frame, int len)
{int i;unsigned char * buf;buf= (unsigned char *) frame;for (i=0;i<len;i++) {fprintf(stderr, "0x%02x, ", *buf++);if ((i&0xf)==0xf)fprintf(stderr, "\n");msleep(1);}if ((i&0xf)!=0xf)fprintf(stderr, "\n");return 0;
}static int generate_color_pattern_nv12(unsigned char *yuvframe, int width, int height)
{int i,j;unsigned char * y0;unsigned short * uv;y0 = (unsigned char *)(yuvframe);uv = (unsigned short *)(yuvframe+width*height);/* y buffer */for (j=0;j<height;j++) {for (i=0;i<width;i++) {*y0 = (i&0xff);y0++;}}/* uv buffer */for (j=0;j<height/2;j++) {for (i=0;i<width/2;i++) {//*uv = (((255-j)&0xff)<<8)|(i&0xff);*uv = (((255-i)&0xff)<<8)|(i&0xff);uv++;}}return 0;
}static int generate_color_pattern_yuv422(unsigned char *yuvframe, int width, int height)
{int i,j;unsigned short * y0u;unsigned short * y1v;y0u = (unsigned short *)(yuvframe);y1v = (unsigned short *)(yuvframe+2);for (j=0;j<height;j++) {for (i=0;i<width/2;i++) {*y0u = (((j)&0xff)<<8)|(i&0xff);*y1v = (((255-j)&0xff)<<8)|(i&0xff);y0u+=2; y1v+=2;}}return 0;
}static int generate_color_pattern_yuv422_2(char *yuvframe, int width, int height)
{int i,j;unsigned short * y0u;unsigned short * y1v;y0u = (unsigned short *)(yuvframe);y1v = (unsigned short *)(yuvframe+2);for (j=0;j<height;j++) {for (i=0;i<width/2;i++) {*y0u = (((i)&0xff)<<8)|(j&0xff);*y1v = (((255-i)&0xff)<<8)|(j&0xff);y0u+=2; y1v+=2;}}return 0;
}int test_jpeg(void)
{int jpg_bs_len;void *jz_jpeg = NULL;int width = WIDTH;int height = HEIGHT;int quality = MEDIUMS_QUALITY;unsigned char *yframe;unsigned char *uvframe;printf("%s() width=%d, height=%d, quality=%d\n", __func__, width, height, quality);jz_jpeg = hw_jpeg_encode_init(width, height);unsigned char *yuvframe = (unsigned char *)JZMalloc(256, width*height*2);if(yuvframe == NULL) {printf("Get src yuv buffer failed!\n");return -1;}yframe = yuvframe;uvframe = yuvframe + (width*height);unsigned char *dst_jpeg_frame = (unsigned char *)JZMalloc(256, width*height*3/2);if(dst_jpeg_frame == NULL) {printf("Get src yuv buffer failed!\n");return -1;}memset(dst_jpeg_frame, 0, width*height*3/2);// dump_framebuffer_hex(dst_jpeg_frame, 124);#if defined(YUV_RAWBIN)memcpy(yuvframe, rawbinData, width*height*2);
#elsegenerate_color_pattern_nv12(yuvframe, width, height);
#endifprintf("convert to jpeg frame:\n");jpg_bs_len = hw_yuv420_planar_nv12_to_jpeg_frame(jz_jpeg, (char *)dst_jpeg_frame, yframe, uvframe, width, height, quality);// jpg_bs_len = hw_yuv420_planar_nv21_to_jpeg_frame(jz_jpeg, (char *)dst_jpeg_frame, yframe, uvframe, width, height, quality);printf("convert to jpeg frame finish. quality=%d, jpg_bs_len=%d\n", quality, jpg_bs_len);if (jpg_bs_len>0) {dump_framebuffer_hex(dst_jpeg_frame, jpg_bs_len);} else {printf("err --- jpg_bs_len = %d\n", jpg_bs_len);}printf("jpeg encode deinit\n");hw_jpeg_encode_deinit(jz_jpeg);free(yuvframe);free(dst_jpeg_frame);return 0;
}