/*
x1?y1?要截取的方形區(qū)域的，左上角坐標(biāo)

crop_width?crop_height?要截取的寬、高
*/

void?get_yuv420p_crop_img（uint8_t?*img_buffer?uint8_t?*out_buffer?
						int?x1?int?y1?int?crop_width?int?crop_height）
{
????int?i?j?k?=?0;

????int?orig_y_size?=?IMG_WIDTH?*?IMG_HEIGHT
????????orig_u_size?=?orig_y_size?>>?2;

????int?crop_x1?crop_y1?crop_x2?crop_y2;
????int?h_s?h_e?w_s?w_e;

????int?loop_y_s1?loop_y_e1?loop_uv_s1?loop_uv_e1;
????int?loop_y_s2?loop_y_e2?loop_uv_s2?loop_uv_e2;

????crop_x1?=?x1;
????crop_y1?=?y1;
????crop_x2?=?x1+crop_width;
????crop_y2?=?y1+crop_height;

????loop_y_s1?=?y1;
????loop_y_e1?=?y1+crop_height;
????loop_y_s2?=?x1;
????loop_y_e2?=?x1+crop_width;

????loop_uv_s1?=?loop_y_s1/2;
????loop_uv_e1?=?loop_y_e1/2;
????lo