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fix rescaling rounding inaccuracy

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We should be using 'floor' when doing the final divide.

-> new MACRO is MULT_FIX_FLOOR()

     XXX*** Mips code is DISABLED for now ***XXX

I'll update and re-enable it in a later
patch, since this code needs some refactoring first.

BUG=oss-fuzz:9179

Change-Id: Ic0693cdca4e71f5beab1029475e35c4d06b12d13
This commit is contained in:
Pascal Massimino
2018-07-10 17:27:21 -07:00
committed by James Zern
parent 211f37ee63
commit 2563db4759
6 changed files with 65 additions and 13 deletions
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4
src/dsp/rescaler_mips32.c
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@ -209,6 +209,7 @@ static void ExportRowExpand_MIPS32(WebPRescaler* const wrk) {
}
}
#if 0 // disabled for now. TODO(skal): make match the C-code
static void ExportRowShrink_MIPS32(WebPRescaler* const wrk) {
const int x_out_max = wrk->dst_width * wrk->num_channels;
uint8_t* dst = wrk->dst;
@ -273,6 +274,7 @@ static void ExportRowShrink_MIPS32(WebPRescaler* const wrk) {
);
}
}
#endif // 0
//------------------------------------------------------------------------------
// Entry point
@ -283,7 +285,7 @@ WEBP_TSAN_IGNORE_FUNCTION void WebPRescalerDspInitMIPS32(void) {
WebPRescalerImportRowExpand = ImportRowExpand_MIPS32;
WebPRescalerImportRowShrink = ImportRowShrink_MIPS32;
WebPRescalerExportRowExpand = ExportRowExpand_MIPS32;
WebPRescalerExportRowShrink = ExportRowShrink_MIPS32;
// WebPRescalerExportRowShrink = ExportRowShrink_MIPS32;
}
#else // !WEBP_USE_MIPS32