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Merge pull request #275 from mozilla/idct-selector

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Make IDCT method customizable
This commit is contained in:
Kornel
2018-11-15 16:05:51 +00:00
committed by GitHub
parent 65aaecd2d5 365bc1ce11
commit add6158e96
3 changed files with 27 additions and 0 deletions
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8
jpeglib.h
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@@ -514,6 +514,8 @@ struct jpeg_compress_struct {
int script_space_size;
};
typedef void (*jpeg_idct_method) (j_decompress_ptr cinfo, jpeg_component_info *compptr, JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col);
typedef void (*jpeg_idct_method_selector) (j_decompress_ptr cinfo, jpeg_component_info *compptr, jpeg_idct_method * set_idct_method, int * set_idct_category);
/* Master record for a decompression instance */
@@ -1137,6 +1139,12 @@ EXTERN(boolean) jpeg_read_icc_profile(j_decompress_ptr cinfo,
JOCTET **icc_data_ptr,
unsigned int *icc_data_len);
/*
* Permit users to replace the IDCT method dynamically.
* The selector callback is called after the default idct implementation was choosen,
* and is able to override it.
*/
EXTERN(void) jpeg_set_idct_method_selector (j_decompress_ptr cinfo, jpeg_idct_method_selector selector);
/* These marker codes are exported since applications and data source modules
* are likely to want to use them.