ijpegenc.c

dm642 开发板视频采集输出的例程源码 包括h263_loopback jpeg_loopback mpeg2_loopback 非常珍贵

/*
 *  ======== ijpegenc.c ========
 *  This file defines the default parameter structure for ijpegenc.h
 */
#include <std.h>
#include "ijpegenc.h"

/*
 *  ======== JPEGENC_PARAMS ========
 *  This constant structure defines the default parameters for JPEGENC objects
 */

/*------------------------------------------------------------------*/
/* If one wants to grab a 320x240 window out of a 720x480 image,    */
/* then:                                                            */
/*                                                                  */
/* #define  HC 720                                                  */
/* #define  VC 480                                                  */
/*                                                                  */
/* #define  H  320                                                  */
/* #define  V  240                                                  */
/*                                                                  */
/* Remember H the horizontal number of samples needs to be a        */
/* multiple of 16.                                                  */
/*------------------------------------------------------------------*/

#define  HC 720
#define  VC 480

#define  H  720
#define  V  480

IJPEGENC_Params IJPEGENC_PARAMS =
{
    sizeof(IJPEGENC_Params),
    8, /* unsigned int  sample_prec; */
    3, /* unsigned int  num_comps; */
    2, /* unsigned int  num_qtables; */
    0, /* unsigned int  interleaved; */
    0x01120112, /* unsigned int  formatflag for 4:2:0; */
    100, /* unsigned int  quality; */
    V, (V/2), (V/2), /* unsigned int  num_lines 4:2:0; */
    H, (H/2), (H/2), /* unsigned int  num_samples; */
    HC,(HC/2),(HC/2) /*unsigned int pitch;*/
};

/*------------------------------------------------------------------*/
/* Texas Instruments Incorporated 1997-2003.                        */
/*==================================================================*/
/*                                                                  */
/*------------------------------------------------------------------*/