//添加huffman表
void jint_add_huff_table(jpeg_compress_info *cinfo,u16 which_tbl,int what_tbl,const u8 *bits,const u8 *value)
{
JHUFF_TBL **hpp;
int nsymbols,len;
if(which_tbl>NUM_HUFF_TBLS)return;
if(what_tbl==0)//直流分量表
hpp=cinfo->dc_huff_table;
else if(what_tbl==1)hpp=cinfo->ac_huff_table;//交流分量表
else return ;
hpp[which_tbl]=&JHUFF_TBL_4[which_tbl*2+what_tbl];
memcpy(hpp[which_tbl]->bits,bits,sizeof(hpp[which_tbl]->bits));
nsymbols=0;//计算huffval中标志的数量
for(len=1;len<=16;len++)nsymbols+=bits[len];
memcpy(hpp[which_tbl]->huffval,value,nsymbols*sizeof(u8));//set huffval
//计算并设置huffman表&表长
memset(hpp[which_tbl]->ecode,0,sizeof(hpp[which_tbl]->ecode));
memset(hpp[which_tbl]->esize,0,sizeof(hpp[which_tbl]->esize));
jint_calc_huff_tbl(hpp[which_tbl]);
}
void jint_add_huff_table ( jpeg_compress_info *cinfo,
unsigned int which_tbl, int what_tbl,
const UINT8 *bits, const UINT8 *value)
{
JHUFF_TBL **hpp; /* this value used to Left-Value */
int nsymbols, len;
if (which_tbl > NUM_HUFF_TBLS)return;
//exit(1);
if (what_tbl == 0) /* DC table */
hpp = cinfo->dc_huff_table;
else if (what_tbl == 1) /* AC table */
hpp = cinfo->ac_huff_table;
else
return ;
//exit(1);
/* set value of 'bits' */
hpp[which_tbl] = &JHUFF_TBL_4[which_tbl*2 + what_tbl];//(JHUFF_TBL *)malloc1;//(sizeof(JHUFF_TBL));
memcpy(hpp[which_tbl]->bits, bits, sizeof(hpp[which_tbl]->bits));
/* calculate # of symbols in huffval */
nsymbols = 0;
for (len=1; len<=16; len++)
{
nsymbols += bits[len];
}
/* set huffval */
memcpy(hpp[which_tbl]->huffval, value, nsymbols*sizeof(UINT8));
/* calculate and set huffman code & size table
* across this we can use 'ECODE & ESIZE' table in huffman encoding.
*/
memset(hpp[which_tbl]->ecode, 0, sizeof(hpp[which_tbl]->ecode));
memset(hpp[which_tbl]->esize, 0, sizeof(hpp[which_tbl]->esize));
jint_calc_huff_tbl(hpp[which_tbl]);
}