39 lines
1004 B
C
39 lines
1004 B
C
typedef struct {
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int component_id;
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int component_index;
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int h_samp_factor;
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int v_samp_factor;
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} jpeg_component_info;
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struct jpeg_common_struct {
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struct jpeg_error_mgr * err;
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};
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typedef struct jpeg_common_struct * j_common_ptr;
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typedef struct jpeg_compress_struct * j_compress_ptr;
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struct jpeg_compress_struct {
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struct jpeg_error_mgr * err;
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int num_components;
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jpeg_component_info * comp_info;
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int max_h_samp_factor;
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int max_v_samp_factor;
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};
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struct jpeg_error_mgr {
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int msg_code;
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};
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void
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jinit_downsampler (j_compress_ptr cinfo)
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{
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int ci;
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jpeg_component_info * compptr;
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for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
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ci++, compptr++) {
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if (compptr->h_samp_factor == cinfo->max_h_samp_factor &&
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compptr->v_samp_factor == cinfo->max_v_samp_factor) {
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} else if ((cinfo->max_h_samp_factor % compptr->h_samp_factor) == 0 &&
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(cinfo->max_v_samp_factor % compptr->v_samp_factor) == 0) {
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} else
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cinfo->err->msg_code = 0;
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}
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}
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