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typedef struct {
int component_id;
int component_index;
int h_samp_factor;
int v_samp_factor;
} jpeg_component_info;
struct jpeg_common_struct {
struct jpeg_error_mgr * err;
};
typedef struct jpeg_common_struct * j_common_ptr;
typedef struct jpeg_compress_struct * j_compress_ptr;
struct jpeg_compress_struct {
struct jpeg_error_mgr * err;
int num_components;
jpeg_component_info * comp_info;
int max_h_samp_factor;
int max_v_samp_factor;
};
struct jpeg_error_mgr {
int msg_code;
};
void
jinit_downsampler (j_compress_ptr cinfo)
{
int ci;
jpeg_component_info * compptr;
for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
ci++, compptr++) {
if (compptr->h_samp_factor == cinfo->max_h_samp_factor &&
compptr->v_samp_factor == cinfo->max_v_samp_factor) {
} else if ((cinfo->max_h_samp_factor % compptr->h_samp_factor) == 0 &&
(cinfo->max_v_samp_factor % compptr->v_samp_factor) == 0) {
} else
cinfo->err->msg_code = 0;
}
}
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