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Simplifying chroma subsample

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This commit is contained in:
Jake Archibald
2018-10-30 09:43:06 +00:00
parent 4b671395fb
commit e8192b4aed
7 changed files with 17 additions and 12 deletions
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4
codecs/mozjpeg_enc/mozjpeg_enc.cpp
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@@ -29,6 +29,7 @@ struct MozJpegOptions {
bool trellis_opt_zero;
bool trellis_opt_table;
int trellis_loops;
bool auto_subsample;
int chroma_subsample;
bool separate_chroma_quality;
int chroma_quality;
@@ -152,7 +153,7 @@ val encode(std::string image_in, int image_width, int image_height, MozJpegOptio
set_quality_ratings(&cinfo, (char*) pqual, opts.baseline);
if (opts.chroma_subsample && opts.color_space == JCS_YCbCr) {
if (!opts.auto_subsample && opts.color_space == JCS_YCbCr) {
cinfo.comp_info[0].h_samp_factor = opts.chroma_subsample;
cinfo.comp_info[0].v_samp_factor = opts.chroma_subsample;
}
@@ -220,6 +221,7 @@ EMSCRIPTEN_BINDINGS(my_module) {
.field("trellis_opt_table", &MozJpegOptions::trellis_opt_table)
.field("trellis_loops", &MozJpegOptions::trellis_loops)
.field("chroma_subsample", &MozJpegOptions::chroma_subsample)
.field("auto_subsample", &MozJpegOptions::auto_subsample)
.field("separate_chroma_quality", &MozJpegOptions::separate_chroma_quality)
.field("chroma_quality", &MozJpegOptions::chroma_quality)
;