檢視具體晶元的gdc 硬體規格，主要看以下引數：
一般魚眼矯正是在vi的擴充套件通道；
即：初始化vi模組後：
vi_ext_chn_attr_s stextchnattr;
vi_chn viextchn = vi_ext_chn_start;
size_s stdstsize;
s32ret = hi_mpi_vi_getchnattr(vipipe, vichn, &stchnattr);
if (hi_success != s32ret)
stextchnattr.s32bindchn = vichn; //擴充套件通道繫結vi通道
stextchnattr.encompressmode = stchnattr.encompressmode;
stextchnattr.enpixformat = stchnattr.enpixelformat;
stextchnattr.stframerate.s32srcframerate = stchnattr.stframerate.s32srcframerate;
stextchnattr.stframerate.s32dstframerate = stchnattr.stframerate.s32dstframerate;
stextchnattr.stsize.u32width = stchnattr.stsize.u32width;
stextchnattr.stsize.u32height = stchnattr.stsize.u32height;
stextchnattr.u32depth = 0;
stextchnattr.endynamicrange = stchnattr.endynamicrange;
stextchnattr.ensource = vi_ext_chn_source_tail;
stdstsize.u32width = stchnattr.stsize.u32width;
stdstsize.u32height = stchnattr.stsize.u32height;
/* start vi dev extern chn */
s32ret = hi_mpi_vi_setextchnattr(vipipe, viextchn, &stextchnattr);
if (hi_success != s32ret)
/*enable ext-channel*/
s32ret = hi_mpi_vi_enablechn(vipipe,viextchn);
if (hi_success != s32ret)
vi -----viext-----vpss-----venc之後設定魚眼屬性：
fisheye_attr_s stfisheyeattr;
stfisheyeattr.benable = hi_true;
stfisheyeattr.blmf = hi_false;
stfisheyeattr.bbgcolor = hi_false;
stfisheyeattr.u32bgcolor = color_rgb_blue;
stfisheyeattr.s32horoffset = 0;
stfisheyeattr.s32veroffset = 0;
stfisheyeattr.u32trapezoidcoef = 10;
stfisheyeattr.s32fanstrength = 300;
stfisheyeattr.enmountmode = fisheye_wall_mount;
stfisheyeattr.u32regionnum = 1;
stfisheyeattr.astfisheyeregionattr[0].enviewmode = fisheye_view_180_panorama;
stfisheyeattr.astfisheyeregionattr[0].u32inradius = 0;
stfisheyeattr.astfisheyeregionattr[0].u32outradius = 1200;
stfisheyeattr.astfisheyeregionattr[0].u32pan = 180;
stfisheyeattr.astfisheyeregionattr[0].u32tilt = 165;
stfisheyeattr.astfisheyeregionattr[0].u32horzoom = 4095;
stfisheyeattr.astfisheyeregionattr[0].u32verzoom = 4095;
stfisheyeattr.astfisheyeregionattr[0].stoutrect.s32x = 0;
stfisheyeattr.astfisheyeregionattr[0].stoutrect.s32y = 0;
stfisheyeattr.astfisheyeregionattr[0].stoutrect.u32width = stdstsize.u32width;
stfisheyeattr.astfisheyeregionattr[0].stoutrect.u32height = align_down(stdstsize.u32height, 2);
s32ret = hi_mpi_vi_setextchnfisheye(vipipe,viextchn,&stfisheyeattr);
if (hi_success != s32ret)
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