hi3531的h264压缩中修改波特率

typedef struct hiVENC_ATTR_H264_CBR_S

{

HI_U32 u32Gop;

HI_U32 u32StatTime;

HI_U32 u32ViFrmRate;

HI_FR32 fr32TargetFrmRate;

HI_U32 u32BitRate;

HI_U32 u32FluctuateLevel;

} VENC_ATTR_H264_CBR_S;

u32BitRate 平均bitrate，以kbps 为单位。

取值范围：[2, 40960]。

HI_S32 SAMPLE_COMM_VENC_Start(VENC_GRP VencGrp,VENC_CHN VencChn, PAYLOAD_TYPE_E enType, VIDEO_NORM_E enNorm, PIC_SIZE_E enSize, SAMPLE_RC_E enRcMode)

{

    HI_S32 s32Ret;

    VENC_CHN_ATTR_S stVencChnAttr;

    VENC_ATTR_H264_S stH264Attr;

    VENC_ATTR_H264_CBR_S    stH264Cbr;

    VENC_ATTR_H264_VBR_S    stH264Vbr;

    VENC_ATTR_H264_FIXQP_S  stH264FixQp;

    VENC_ATTR_MJPEG_S stMjpegAttr;

    VENC_ATTR_MJPEG_FIXQP_S stMjpegeFixQp;

    VENC_ATTR_JPEG_S stJpegAttr;

    SIZE_S stPicSize;

s32Ret = SAMPLE_COMM_SYS_GetPicSize(enNorm, enSize, &stPicSize);

     if (HI_SUCCESS != s32Ret)

    {

        SAMPLE_PRT("Get picture size failed!\n");

        return HI_FAILURE;

    }

    /******************************************

     step 1: Greate Venc Group

    ******************************************/

    s32Ret = HI_MPI_VENC_CreateGroup(VencGrp);

    if (HI_SUCCESS != s32Ret)

    {

        SAMPLE_PRT("HI_MPI_VENC_CreateGroup[%d] failed with %#x!\n",\

                 VencGrp, s32Ret);

        return HI_FAILURE;

    }

/******************************************

     step 2:  Create Venc Channel

    ******************************************/

    stVencChnAttr.stVeAttr.enType = enType;

    switch(enType)

    {

        case PT_H264:

        {

            stH264Attr.u32MaxPicWidth = stPicSize.u32Width;

            stH264Attr.u32MaxPicHeight = stPicSize.u32Height;

            stH264Attr.u32PicWidth = stPicSize.u32Width;/*the picture width*/

            stH264Attr.u32PicHeight = stPicSize.u32Height;/*the picture height*/

            stH264Attr.u32BufSize  = stPicSize.u32Width * stPicSize.u32Height * 2;/*stream buffer size*/

            stH264Attr.u32Profile  = 0;/*0: baseline; 1:MP; 2:HP   ? */

            stH264Attr.bByFrame = HI_TRUE;/*get stream mode is slice mode or frame mode?*/

            stH264Attr.bField = HI_FALSE;  /* surpport frame code only for hi3516, bfield = HI_FALSE */

            stH264Attr.bMainStream = HI_TRUE; /* surpport main stream only for hi3516, bMainStream = HI_TRUE */

            stH264Attr.u32Priority = 0; /*channels precedence level. invalidate for hi3516*/

            stH264Attr.bVIField = HI_FALSE;/*the sign of the VI picture is field or frame. Invalidate for hi3516*/

            memcpy(&stVencChnAttr.stVeAttr.stAttrH264e, &stH264Attr, sizeof(VENC_ATTR_H264_S));

if(SAMPLE_RC_CBR == enRcMode)

            {

                stVencChnAttr.stRcAttr.enRcMode = VENC_RC_MODE_H264CBR;

                stH264Cbr.u32Gop            = (VIDEO_ENCODING_MODE_PAL== enNorm)?25:30;

                stH264Cbr.u32StatTime       = 1; /* stream rate statics time(s) */

                stH264Cbr.u32ViFrmRate      = (VIDEO_ENCODING_MODE_PAL== enNorm)?25:30;/* input (vi) frame rate */

                stH264Cbr.fr32TargetFrmRate = (VIDEO_ENCODING_MODE_PAL== enNorm)?25:30;/* target frame rate */

                switch (enSize)

                {

                  case PIC_QCIF:

                    stH264Cbr.u32BitRate = 256; /* average bit rate */

                    break;

                  case PIC_QVGA:    /* 320 * 240 */

                  case PIC_CIF:

stH264Cbr.u32BitRate = 512;

                       break;

case PIC_D1:

                  case PIC_VGA:    /* 640 * 480 */

                    stH264Cbr.u32BitRate = 1024*2;

                       break;

                  case PIC_HD720:   /* 1280 * 720 */

                    stH264Cbr.u32BitRate = 1024*3;

                    break;

                  case PIC_HD1080:  /* 1920 * 1080 */

                      stH264Cbr.u32BitRate = 1024*6;

                    break;

                  default :

                       stH264Cbr.u32BitRate = 1024*4;

                       break;

                }