void img_ycrcb420p_to_bgra(uint8_t* src[],unsigned short w,unsigned short h, uint32_t dest[]) {
unsigned int offset_y=0;
unsigned int offset_dest=0;
unsigned int offset_cbcr=0;
int row;
int i;
int col_crcb=0;
int col_y;
int16_t r1[4], g1[4], b1[4], r2[4], g2[4], b2[4];
if (premult_initd == FALSE) {
init_premults();
}
for (row=0;row<h;row+=2) {
offset_y=row*w;
offset_cbcr=offset_y>>2;
for (col_y=0;col_y<w;col_y+=4) {
yuv2rgb_4x2(src[0]+offset_y+col_y
,src[0]+offset_y+w+col_y
,(src[1]+offset_cbcr+col_crcb)
,(src[2]+offset_cbcr+col_crcb)
,r1
,g1
,b1
,r2
,g2
,b2);
for (i =0;i<4;i++) {
*(uint8_t*)(dest+offset_dest+i) = b1[i];
*((uint8_t*)(dest+offset_dest+i)+1) = g1[i];
*((uint8_t*)(dest+offset_dest+i)+2) = r1[i];
*((uint8_t*)(dest+offset_dest+i)+3) = 255;
*(uint8_t*)(dest+w+offset_dest+i) = b2[i];
*((uint8_t*)(dest+w+offset_dest+i)+1) = g2[i];
*((uint8_t*)(dest+w+offset_dest+i)+2) = r2[i];
*((uint8_t*)(dest+w+offset_dest+i)+3) = 255;
}
col_crcb+=2;
offset_dest=offset_y+col_y;
}
}
}
static MSScalerContext *android_create_scaler_context(int src_w, int src_h, MSPixFmt src_fmt, int dst_w, int dst_h, MSPixFmt dst_fmt, int flags){
AndroidScalerCtx *ctx=ms_new0(AndroidScalerCtx,1);
int i;
int tmp,prev;
if (!premult_initd){
init_premults();
premult_initd=TRUE;
}
if (src_fmt!=MS_YUV420P && dst_fmt!=MS_RGB565){
ms_fatal("FIXME: unsupported rescaling scheme.");
ms_free(ctx);
return NULL;
}
ctx->src_size.width=src_w;
ctx->src_size.height=src_h;
ctx->dst_size.width=dst_w;
ctx->dst_size.height=dst_h;
ctx->hscaled_img_stride=ROUND_UP(dst_w,PAD);
ctx->unscaled_stride=ROUND_UP(src_w,PAD);
for(i=0;i<3;++i){
ctx->unscaled_2lines[i]=ms_new(int16_t,ROUND_UP(src_w,PAD)*2);
ctx->hscaled_img[i]=ms_new(int16_t,ctx->hscaled_img_stride*dst_h);
}
ctx->w_inc=(src_w<<16)/dst_w;
ctx->h_inc=(src_h<<16)/dst_h;
/*compute the grid (map) for original lines into destination lines*/
ctx->dst_w_padded=ROUND_UP(dst_w,PAD);
ctx->hgrid=ms_new0(uint32_t,ctx->dst_w_padded);
ctx->hcoeffs=ms_new0(int16_t,ctx->dst_w_padded);
tmp=0;
prev=0;
for(i=0;i<dst_w;++i){
int offset=(tmp>>16)*2;
ctx->hgrid[i]=offset-prev;
ctx->hcoeffs[i]=(tmp&0xffff)>>9;
prev=offset;
tmp+=ctx->w_inc;
}
return (MSScalerContext*)ctx;
}
