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swscale/swscale: Document param[0..1] 

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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Michael Niedermayer 2015-08-09 02:27:09 +02:00
parent e66a43f694
commit c64f01227f
1 changed files with 6 additions and 0 deletions
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6
libswscale/swscale.h
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@ -185,6 +185,12 @@ void sws_freeContext(struct SwsContext *swsContext);
* @param dstH the height of the destination image
* @param dstFormat the destination image format
* @param flags specify which algorithm and options to use for rescaling
* @param param extra parameters to tune the used scaler
* For SWS_BICUBIC param[0] and [1] tune the shape of the basis
* function, param[0] tunes f(1) and param[1] f´(1)
* For SWS_GAUSS param[0] tunes the exponent and thus cutoff
* frequency
* For SWS_LANCZOS param[0] tunes the width of the window function
* @return a pointer to an allocated context, or NULL in case of error
* @note this function is to be removed after a saner alternative is
* written