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Patch by Dzonatas and Callum Lerwick. Fp/vectorization patch which basically converts most of the irreversible decode codepath to floating point, eliminating a few rounds of int/fp conversion, resulting in a vast performance improvement, and an increase in accuracy.

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Francois-Olivier Devaux
2007-11-13 17:35:12 +00:00
parent 014694b04f
commit dbeebe72b9
9 changed files with 624 additions and 382 deletions
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14
libopenjpeg/dwt.h
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@@ -57,9 +57,9 @@ void dwt_encode(opj_tcd_tilecomp_t * tilec);
Inverse 5-3 wavelet tranform in 2-D.
Apply a reversible inverse DWT transform to a component of an image.
@param tilec Tile component information (current tile)
@param stop FIXME Number of decoded resolution levels ?
@param numres Number of resolution levels to decode
*/
void dwt_decode(opj_tcd_tilecomp_t * tilec, int stop);
void dwt_decode(opj_tcd_tilecomp_t* tilec, int numres);
/**
Get the gain of a subband for the reversible 5-3 DWT.
@param orient Number that identifies the subband (0->LL, 1->HL, 2->LH, 3->HH)
@@ -83,9 +83,9 @@ void dwt_encode_real(opj_tcd_tilecomp_t * tilec);
Inverse 9-7 wavelet transform in 2-D.
Apply an irreversible inverse DWT transform to a component of an image.
@param tilec Tile component information (current tile)
@param stop FIXME Number of decoded resolution levels ?
@param numres Number of resolution levels to decode
*/
void dwt_decode_real(opj_tcd_tilecomp_t * tilec, int stop);
void dwt_decode_real(opj_tcd_tilecomp_t* tilec, int numres);
/**
Get the gain of a subband for the irreversible 9-7 DWT.
@param orient Number that identifies the subband (0->LL, 1->HL, 2->LH, 3->HH)
@@ -100,9 +100,9 @@ Get the norm of a wavelet function of a subband at a specified level for the irr
*/
double dwt_getnorm_real(int level, int orient);
/**
FIXME : comment ???
@param tccp
@param prec
Explicit calculation of the Quantization Stepsizes
@param tccp Tile-component coding parameters
@param prec Precint analyzed
*/
void dwt_calc_explicit_stepsizes(opj_tccp_t * tccp, int prec);
/* ----------------------------------------------------------------------- */