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Use 64 bit fixed point for scaling columns if source is 32k or wider.

Browse Source 
BUG=302
TESTED=out\release\libyuv_unittest --gtest_filter=*I*ToI*
R=tpsiaki@google.com

Review URL: https://webrtc-codereview.appspot.com/6509004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@942 16f28f9a-4ce2-e073-06de-1de4eb20be90
This commit is contained in:
fbarchard@google.com 2014-01-03 00:34:55 +00:00
parent 88c0b01cdd
commit 90a36b29d3
5 changed files with 36 additions and 5 deletions
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2
README.chromium
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@ -1,6 +1,6 @@
Name: libyuv
URL: http://code.google.com/p/libyuv/
Version: 941
Version: 942
License: BSD
License File: LICENSE

2
include/libyuv/scale_row.h
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@ -112,6 +112,8 @@ void ScaleColsUp2_C(uint8* dst_ptr, const uint8* src_ptr,
int dst_width, int, int);
void ScaleFilterCols_C(uint8* dst_ptr, const uint8* src_ptr,
int dst_width, int x, int dx);
void ScaleFilterCols64_C(uint8* dst_ptr, const uint8* src_ptr,
int dst_width, int x, int dx);
void ScaleRowDown38_C(const uint8* src_ptr, ptrdiff_t /* src_stride */,
uint8* dst, int dst_width);
void ScaleRowDown38_3_Box_C(const uint8* src_ptr,

2
include/libyuv/version.h
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@ -11,6 +11,6 @@
#ifndef INCLUDE_LIBYUV_VERSION_H_ // NOLINT
#define INCLUDE_LIBYUV_VERSION_H_
#define LIBYUV_VERSION 941
#define LIBYUV_VERSION 942
#endif // INCLUDE_LIBYUV_VERSION_H_ NOLINT

11
source/scale.cc
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@ -511,9 +511,11 @@ void ScalePlaneBilinearDown(int src_width, int src_height,
#endif
void (*ScaleFilterCols)(uint8* dst_ptr, const uint8* src_ptr,
int dst_width, int x, int dx) = ScaleFilterCols_C;
int dst_width, int x, int dx) =
(src_width >= 32768) ? ScaleFilterCols64_C : ScaleFilterCols_C;
#if defined(HAS_SCALEFILTERCOLS_SSSE3)
if (TestCpuFlag(kCpuHasSSSE3)) {
if (TestCpuFlag(kCpuHasSSSE3) && src_width < 32768) {
ScaleFilterCols = ScaleFilterCols_SSSE3;
}
#endif
@ -614,8 +616,11 @@ void ScalePlaneBilinearUp(int src_width, int src_height,
void (*ScaleFilterCols)(uint8* dst_ptr, const uint8* src_ptr,
int dst_width, int x, int dx) =
filtering ? ScaleFilterCols_C : ScaleCols_C;
if (filtering && src_width >= 32768) {
ScaleFilterCols = ScaleFilterCols64_C;
}
#if defined(HAS_SCALEFILTERCOLS_SSSE3)
if (filtering && TestCpuFlag(kCpuHasSSSE3)) {
if (filtering && TestCpuFlag(kCpuHasSSSE3) && src_width < 32768) {
ScaleFilterCols = ScaleFilterCols_SSSE3;
}
#endif

24
source/scale_common.cc
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@ -229,6 +229,30 @@ void ScaleFilterCols_C(uint8* dst_ptr, const uint8* src_ptr,
dst_ptr[0] = BLENDER(a, b, x & 0xffff);
}
}
void ScaleFilterCols64_C(uint8* dst_ptr, const uint8* src_ptr,
int dst_width, int x32, int dx) {
int64 x = static_cast<int64>(x32);
for (int j = 0; j < dst_width - 1; j += 2) {
int64 xi = x >> 16;
int a = src_ptr[xi];
int b = src_ptr[xi + 1];
dst_ptr[0] = BLENDER(a, b, x & 0xffff);
x += dx;
xi = x >> 16;
a = src_ptr[xi];
b = src_ptr[xi + 1];
dst_ptr[1] = BLENDER(a, b, x & 0xffff);
x += dx;
dst_ptr += 2;
}
if (dst_width & 1) {
int64 xi = x >> 16;
int a = src_ptr[xi];
int b = src_ptr[xi + 1];
dst_ptr[0] = BLENDER(a, b, x & 0xffff);
}
}
#undef BLENDER
void ScaleRowDown38_C(const uint8* src_ptr, ptrdiff_t /* src_stride */,