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scale port to c. completes all scaling functions.

Browse Source 
BUG=303
TESTED=cl /c /TC /Iinclude source/scale.cc
R=tpsiaki@google.com

Review URL: https://webrtc-codereview.appspot.com/7319004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@974 16f28f9a-4ce2-e073-06de-1de4eb20be90
This commit is contained in:
fbarchard@google.com 2014-01-18 01:30:58 +00:00
parent f5f5bbf8f9
commit fa83188365
3 changed files with 131 additions and 119 deletions
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2
README.chromium
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@ -1,6 +1,6 @@
Name: libyuv Name: libyuv
URL: http://code.google.com/p/libyuv/ URL: http://code.google.com/p/libyuv/
Version: 973 Version: 974
License: BSD License: BSD
License File: LICENSE License File: LICENSE

2
include/libyuv/version.h
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@ -11,6 +11,6 @@
#ifndef INCLUDE_LIBYUV_VERSION_H_ // NOLINT #ifndef INCLUDE_LIBYUV_VERSION_H_ // NOLINT
#define INCLUDE_LIBYUV_VERSION_H_ #define INCLUDE_LIBYUV_VERSION_H_
#define LIBYUV_VERSION 973 #define LIBYUV_VERSION 974
#endif // INCLUDE_LIBYUV_VERSION_H_ NOLINT #endif // INCLUDE_LIBYUV_VERSION_H_ NOLINT

246
source/scale.cc
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@ -41,6 +41,7 @@ static void ScalePlaneDown2(int src_width, int src_height,
int src_stride, int dst_stride, int src_stride, int dst_stride,
const uint8* src_ptr, uint8* dst_ptr, const uint8* src_ptr, uint8* dst_ptr,
enum FilterMode filtering) { enum FilterMode filtering) {
int y;
void (*ScaleRowDown2)(const uint8* src_ptr, ptrdiff_t src_stride, void (*ScaleRowDown2)(const uint8* src_ptr, ptrdiff_t src_stride,
uint8* dst_ptr, int dst_width) = uint8* dst_ptr, int dst_width) =
filtering == kFilterNone ? ScaleRowDown2_C : filtering == kFilterNone ? ScaleRowDown2_C :
@ -82,7 +83,6 @@ static void ScalePlaneDown2(int src_width, int src_height,
src_stride = 0; src_stride = 0;
} }
// TODO(fbarchard): Loop through source height to allow odd height. // TODO(fbarchard): Loop through source height to allow odd height.
int y;
for (y = 0; y < dst_height; ++y) { for (y = 0; y < dst_height; ++y) {
ScaleRowDown2(src_ptr, src_stride, dst_ptr, dst_width); ScaleRowDown2(src_ptr, src_stride, dst_ptr, dst_width);
src_ptr += row_stride; src_ptr += row_stride;
@ -99,6 +99,7 @@ static void ScalePlaneDown4(int src_width, int src_height,
int src_stride, int dst_stride, int src_stride, int dst_stride,
const uint8* src_ptr, uint8* dst_ptr, const uint8* src_ptr, uint8* dst_ptr,
enum FilterMode filtering) { enum FilterMode filtering) {
int y;
void (*ScaleRowDown4)(const uint8* src_ptr, ptrdiff_t src_stride, void (*ScaleRowDown4)(const uint8* src_ptr, ptrdiff_t src_stride,
uint8* dst_ptr, int dst_width) = uint8* dst_ptr, int dst_width) =
filtering ? ScaleRowDown4Box_C : ScaleRowDown4_C; filtering ? ScaleRowDown4Box_C : ScaleRowDown4_C;
@ -129,7 +130,6 @@ static void ScalePlaneDown4(int src_width, int src_height,
if (filtering == kFilterLinear) { if (filtering == kFilterLinear) {
src_stride = 0; src_stride = 0;
} }
int y;
for (y = 0; y < dst_height; ++y) { for (y = 0; y < dst_height; ++y) {
ScaleRowDown4(src_ptr, src_stride, dst_ptr, dst_width); ScaleRowDown4(src_ptr, src_stride, dst_ptr, dst_width);
src_ptr += row_stride; src_ptr += row_stride;
@ -144,11 +144,13 @@ static void ScalePlaneDown34(int src_width, int src_height,
int src_stride, int dst_stride, int src_stride, int dst_stride,
const uint8* src_ptr, uint8* dst_ptr, const uint8* src_ptr, uint8* dst_ptr,
enum FilterMode filtering) { enum FilterMode filtering) {
assert(dst_width % 3 == 0); int y;
void (*ScaleRowDown34_0)(const uint8* src_ptr, ptrdiff_t src_stride, void (*ScaleRowDown34_0)(const uint8* src_ptr, ptrdiff_t src_stride,
uint8* dst_ptr, int dst_width); uint8* dst_ptr, int dst_width);
void (*ScaleRowDown34_1)(const uint8* src_ptr, ptrdiff_t src_stride, void (*ScaleRowDown34_1)(const uint8* src_ptr, ptrdiff_t src_stride,
uint8* dst_ptr, int dst_width); uint8* dst_ptr, int dst_width);
const int filter_stride = (filtering == kFilterLinear) ? 0 : src_stride;
assert(dst_width % 3 == 0);
if (!filtering) { if (!filtering) {
ScaleRowDown34_0 = ScaleRowDown34_C; ScaleRowDown34_0 = ScaleRowDown34_C;
ScaleRowDown34_1 = ScaleRowDown34_C; ScaleRowDown34_1 = ScaleRowDown34_C;
@ -193,8 +195,6 @@ static void ScalePlaneDown34(int src_width, int src_height,
} }
#endif #endif
const int filter_stride = (filtering == kFilterLinear) ? 0 : src_stride;
int y;
for (y = 0; y < dst_height - 2; y += 3) { for (y = 0; y < dst_height - 2; y += 3) {
ScaleRowDown34_0(src_ptr, filter_stride, dst_ptr, dst_width); ScaleRowDown34_0(src_ptr, filter_stride, dst_ptr, dst_width);
src_ptr += src_stride; src_ptr += src_stride;
@ -240,11 +240,13 @@ static void ScalePlaneDown38(int src_width, int src_height,
int src_stride, int dst_stride, int src_stride, int dst_stride,
const uint8* src_ptr, uint8* dst_ptr, const uint8* src_ptr, uint8* dst_ptr,
enum FilterMode filtering) { enum FilterMode filtering) {
assert(dst_width % 3 == 0); int y;
void (*ScaleRowDown38_3)(const uint8* src_ptr, ptrdiff_t src_stride, void (*ScaleRowDown38_3)(const uint8* src_ptr, ptrdiff_t src_stride,
uint8* dst_ptr, int dst_width); uint8* dst_ptr, int dst_width);
void (*ScaleRowDown38_2)(const uint8* src_ptr, ptrdiff_t src_stride, void (*ScaleRowDown38_2)(const uint8* src_ptr, ptrdiff_t src_stride,
uint8* dst_ptr, int dst_width); uint8* dst_ptr, int dst_width);
const int filter_stride = (filtering == kFilterLinear) ? 0 : src_stride;
assert(dst_width % 3 == 0);
if (!filtering) { if (!filtering) {
ScaleRowDown38_3 = ScaleRowDown38_C; ScaleRowDown38_3 = ScaleRowDown38_C;
ScaleRowDown38_2 = ScaleRowDown38_C; ScaleRowDown38_2 = ScaleRowDown38_C;
@ -287,8 +289,6 @@ static void ScalePlaneDown38(int src_width, int src_height,
} }
#endif #endif
const int filter_stride = (filtering == kFilterLinear) ? 0 : src_stride;
int y;
for (y = 0; y < dst_height - 2; y += 3) { for (y = 0; y < dst_height - 2; y += 3) {
ScaleRowDown38_3(src_ptr, filter_stride, dst_ptr, dst_width); ScaleRowDown38_3(src_ptr, filter_stride, dst_ptr, dst_width);
src_ptr += src_stride * 3; src_ptr += src_stride * 3;
@ -314,10 +314,10 @@ static void ScalePlaneDown38(int src_width, int src_height,
static __inline uint32 SumBox(int iboxwidth, int iboxheight, static __inline uint32 SumBox(int iboxwidth, int iboxheight,
ptrdiff_t src_stride, const uint8* src_ptr) { ptrdiff_t src_stride, const uint8* src_ptr) {
assert(iboxwidth > 0);
assert(iboxheight > 0);
uint32 sum = 0u; uint32 sum = 0u;
int y; int y;
assert(iboxwidth > 0);
assert(iboxheight > 0);
for (y = 0; y < iboxheight; ++y) { for (y = 0; y < iboxheight; ++y) {
int x; int x;
for (x = 0; x < iboxwidth; ++x) { for (x = 0; x < iboxwidth; ++x) {
@ -332,19 +332,20 @@ static void ScalePlaneBoxRow_C(int dst_width, int boxheight,
int x, int dx, ptrdiff_t src_stride, int x, int dx, ptrdiff_t src_stride,
const uint8* src_ptr, uint8* dst_ptr) { const uint8* src_ptr, uint8* dst_ptr) {
int i; int i;
int boxwidth;
for (i = 0; i < dst_width; ++i) { for (i = 0; i < dst_width; ++i) {
int ix = x >> 16; int ix = x >> 16;
x += dx; x += dx;
int boxwidth = (x >> 16) - ix; boxwidth = (x >> 16) - ix;
*dst_ptr++ = SumBox(boxwidth, boxheight, src_stride, src_ptr + ix) / *dst_ptr++ = SumBox(boxwidth, boxheight, src_stride, src_ptr + ix) /
(boxwidth * boxheight); (boxwidth * boxheight);
} }
} }
static __inline uint32 SumPixels(int iboxwidth, const uint16* src_ptr) { static __inline uint32 SumPixels(int iboxwidth, const uint16* src_ptr) {
assert(iboxwidth > 0);
uint32 sum = 0u; uint32 sum = 0u;
int x; int x;
assert(iboxwidth > 0);
for (x = 0; x < iboxwidth; ++x) { for (x = 0; x < iboxwidth; ++x) {
sum += src_ptr[x]; sum += src_ptr[x];
} }
@ -353,16 +354,17 @@ static __inline uint32 SumPixels(int iboxwidth, const uint16* src_ptr) {
static void ScaleAddCols2_C(int dst_width, int boxheight, int x, int dx, static void ScaleAddCols2_C(int dst_width, int boxheight, int x, int dx,
const uint16* src_ptr, uint8* dst_ptr) { const uint16* src_ptr, uint8* dst_ptr) {
int i;
int scaletbl[2]; int scaletbl[2];
int minboxwidth = (dx >> 16); int minboxwidth = (dx >> 16);
int* scaleptr = scaletbl - minboxwidth;
int boxwidth;
scaletbl[0] = 65536 / (minboxwidth * boxheight); scaletbl[0] = 65536 / (minboxwidth * boxheight);
scaletbl[1] = 65536 / ((minboxwidth + 1) * boxheight); scaletbl[1] = 65536 / ((minboxwidth + 1) * boxheight);
int* scaleptr = scaletbl - minboxwidth;
int i;
for (i = 0; i < dst_width; ++i) { for (i = 0; i < dst_width; ++i) {
int ix = x >> 16; int ix = x >> 16;
x += dx; x += dx;
int boxwidth = (x >> 16) - ix; boxwidth = (x >> 16) - ix;
*dst_ptr++ = SumPixels(boxwidth, src_ptr + ix) * scaleptr[boxwidth] >> 16; *dst_ptr++ = SumPixels(boxwidth, src_ptr + ix) * scaleptr[boxwidth] >> 16;
} }
} }
@ -389,27 +391,29 @@ static void ScalePlaneBox(int src_width, int src_height,
int dst_width, int dst_height, int dst_width, int dst_height,
int src_stride, int dst_stride, int src_stride, int dst_stride,
const uint8* src_ptr, uint8* dst_ptr) { const uint8* src_ptr, uint8* dst_ptr) {
int j;
// Initial source x/y coordinate and step values as 16.16 fixed point. // Initial source x/y coordinate and step values as 16.16 fixed point.
int x = 0; int x = 0;
int y = 0; int y = 0;
int dx = 0; int dx = 0;
int dy = 0; int dy = 0;
const int max_y = (src_height << 16);
ScaleSlope(src_width, src_height, dst_width, dst_height, kFilterBox, ScaleSlope(src_width, src_height, dst_width, dst_height, kFilterBox,
&x, &y, &dx, &dy); &x, &y, &dx, &dy);
src_width = Abs(src_width); src_width = Abs(src_width);
const int max_y = (src_height << 16);
// TODO(fbarchard): Remove this and make AddRows handle boxheight 1. // TODO(fbarchard): Remove this and make AddRows handle boxheight 1.
if (!IS_ALIGNED(src_width, 16) || dst_height * 2 > src_height) { if (!IS_ALIGNED(src_width, 16) || dst_height * 2 > src_height) {
uint8* dst = dst_ptr; uint8* dst = dst_ptr;
int j; int j;
for (j = 0; j < dst_height; ++j) { for (j = 0; j < dst_height; ++j) {
int boxheight;
int iy = y >> 16; int iy = y >> 16;
const uint8* src = src_ptr + iy * src_stride; const uint8* src = src_ptr + iy * src_stride;
y += dy; y += dy;
if (y > max_y) { if (y > max_y) {
y = max_y; y = max_y;
} }
int boxheight = (y >> 16) - iy; boxheight = (y >> 16) - iy;
ScalePlaneBoxRow_C(dst_width, boxheight, ScalePlaneBoxRow_C(dst_width, boxheight,
x, dx, src_stride, x, dx, src_stride,
src, dst); src, dst);
@ -417,40 +421,42 @@ static void ScalePlaneBox(int src_width, int src_height,
} }
return; return;
} }
// Allocate a row buffer of uint16. {
align_buffer_64(row16, src_width * 2); // Allocate a row buffer of uint16.
align_buffer_64(row16, src_width * 2);
void (*ScaleAddCols)(int dst_width, int boxheight, int x, int dx,
const uint16* src_ptr, uint8* dst_ptr) =
(dx & 0xffff) ? ScaleAddCols2_C: ScaleAddCols1_C;
void (*ScaleAddRows)(const uint8* src_ptr, ptrdiff_t src_stride,
uint16* dst_ptr, int src_width, int src_height) = ScaleAddRows_C;
void (*ScaleAddCols)(int dst_width, int boxheight, int x, int dx,
const uint16* src_ptr, uint8* dst_ptr) =
(dx & 0xffff) ? ScaleAddCols2_C: ScaleAddCols1_C;
void (*ScaleAddRows)(const uint8* src_ptr, ptrdiff_t src_stride,
uint16* dst_ptr, int src_width, int src_height) = ScaleAddRows_C;
#if defined(HAS_SCALEADDROWS_SSE2) #if defined(HAS_SCALEADDROWS_SSE2)
if (TestCpuFlag(kCpuHasSSE2) && if (TestCpuFlag(kCpuHasSSE2) &&
#ifdef AVOID_OVERREAD #ifdef AVOID_OVERREAD
IS_ALIGNED(src_width, 16) && IS_ALIGNED(src_width, 16) &&
#endif #endif
IS_ALIGNED(src_ptr, 16) && IS_ALIGNED(src_stride, 16)) { IS_ALIGNED(src_ptr, 16) && IS_ALIGNED(src_stride, 16)) {
ScaleAddRows = ScaleAddRows_SSE2; ScaleAddRows = ScaleAddRows_SSE2;
} }
#endif #endif
int j; for (j = 0; j < dst_height; ++j) {
for (j = 0; j < dst_height; ++j) { int boxheight;
int iy = y >> 16; int iy = y >> 16;
const uint8* src = src_ptr + iy * src_stride; const uint8* src = src_ptr + iy * src_stride;
y += dy; y += dy;
if (y > (src_height << 16)) { if (y > (src_height << 16)) {
y = (src_height << 16); y = (src_height << 16);
} }
int boxheight = (y >> 16) - iy; boxheight = (y >> 16) - iy;
ScaleAddRows(src, src_stride, (uint16*)(row16), ScaleAddRows(src, src_stride, (uint16*)(row16),
src_width, boxheight); src_width, boxheight);
ScaleAddCols(dst_width, boxheight, x, dx, (uint16*)(row16), ScaleAddCols(dst_width, boxheight, x, dx, (uint16*)(row16),
dst_ptr); dst_ptr);
dst_ptr += dst_stride; dst_ptr += dst_stride;
}
free_aligned_buffer_64(row16);
} }
free_aligned_buffer_64(row16);
} }
// Scale plane down with bilinear interpolation. // Scale plane down with bilinear interpolation.
@ -464,13 +470,22 @@ void ScalePlaneBilinearDown(int src_width, int src_height,
int y = 0; int y = 0;
int dx = 0; int dx = 0;
int dy = 0; int dy = 0;
// TODO(fbarchard): Consider not allocating row buffer for kFilterLinear.
// Allocate a row buffer.
align_buffer_64(row, src_width);
const int max_y = (src_height - 1) << 16;
int j;
void (*ScaleFilterCols)(uint8* dst_ptr, const uint8* src_ptr,
int dst_width, int x, int dx) =
(src_width >= 32768) ? ScaleFilterCols64_C : ScaleFilterCols_C;
void (*InterpolateRow)(uint8* dst_ptr, const uint8* src_ptr,
ptrdiff_t src_stride, int dst_width, int source_y_fraction) =
InterpolateRow_C;
ScaleSlope(src_width, src_height, dst_width, dst_height, filtering, ScaleSlope(src_width, src_height, dst_width, dst_height, filtering,
&x, &y, &dx, &dy); &x, &y, &dx, &dy);
src_width = Abs(src_width); src_width = Abs(src_width);
void (*InterpolateRow)(uint8* dst_ptr, const uint8* src_ptr,
ptrdiff_t src_stride, int dst_width, int source_y_fraction) =
InterpolateRow_C;
#if defined(HAS_INTERPOLATEROW_SSE2) #if defined(HAS_INTERPOLATEROW_SSE2)
if (TestCpuFlag(kCpuHasSSE2) && src_width >= 16) { if (TestCpuFlag(kCpuHasSSE2) && src_width >= 16) {
InterpolateRow = InterpolateRow_Any_SSE2; InterpolateRow = InterpolateRow_Any_SSE2;
@ -518,26 +533,17 @@ void ScalePlaneBilinearDown(int src_width, int src_height,
} }
#endif #endif
void (*ScaleFilterCols)(uint8* dst_ptr, const uint8* src_ptr,
int dst_width, int x, int dx) =
(src_width >= 32768) ? ScaleFilterCols64_C : ScaleFilterCols_C;
#if defined(HAS_SCALEFILTERCOLS_SSSE3) #if defined(HAS_SCALEFILTERCOLS_SSSE3)
if (TestCpuFlag(kCpuHasSSSE3) && src_width < 32768) { if (TestCpuFlag(kCpuHasSSSE3) && src_width < 32768) {
ScaleFilterCols = ScaleFilterCols_SSSE3; ScaleFilterCols = ScaleFilterCols_SSSE3;
} }
#endif #endif
if (y > max_y) {
y = max_y;
}
// TODO(fbarchard): Consider not allocating row buffer for kFilterLinear.
// Allocate a row buffer.
align_buffer_64(row, src_width);
const int max_y = (src_height - 1) << 16;
int j;
for (j = 0; j < dst_height; ++j) { for (j = 0; j < dst_height; ++j) {
if (y > max_y) {
y = max_y;
}
int yi = y >> 16; int yi = y >> 16;
const uint8* src = src_ptr + yi * src_stride; const uint8* src = src_ptr + yi * src_stride;
if (filtering == kFilterLinear) { if (filtering == kFilterLinear) {
@ -549,6 +555,9 @@ void ScalePlaneBilinearDown(int src_width, int src_height,
} }
dst_ptr += dst_stride; dst_ptr += dst_stride;
y += dy; y += dy;
if (y > max_y) {
y = max_y;
}
} }
free_aligned_buffer_64(row); free_aligned_buffer_64(row);
} }
@ -559,18 +568,23 @@ void ScalePlaneBilinearUp(int src_width, int src_height,
int src_stride, int dst_stride, int src_stride, int dst_stride,
const uint8* src_ptr, uint8* dst_ptr, const uint8* src_ptr, uint8* dst_ptr,
enum FilterMode filtering) { enum FilterMode filtering) {
int j;
// Initial source x/y coordinate and step values as 16.16 fixed point. // Initial source x/y coordinate and step values as 16.16 fixed point.
int x = 0; int x = 0;
int y = 0; int y = 0;
int dx = 0; int dx = 0;
int dy = 0; int dy = 0;
const int max_y = (src_height - 1) << 16;
void (*InterpolateRow)(uint8* dst_ptr, const uint8* src_ptr,
ptrdiff_t src_stride, int dst_width, int source_y_fraction) =
InterpolateRow_C;
void (*ScaleFilterCols)(uint8* dst_ptr, const uint8* src_ptr,
int dst_width, int x, int dx) =
filtering ? ScaleFilterCols_C : ScaleCols_C;
ScaleSlope(src_width, src_height, dst_width, dst_height, filtering, ScaleSlope(src_width, src_height, dst_width, dst_height, filtering,
&x, &y, &dx, &dy); &x, &y, &dx, &dy);
src_width = Abs(src_width); src_width = Abs(src_width);
void (*InterpolateRow)(uint8* dst_ptr, const uint8* src_ptr,
ptrdiff_t src_stride, int dst_width, int source_y_fraction) =
InterpolateRow_C;
#if defined(HAS_INTERPOLATEROW_SSE2) #if defined(HAS_INTERPOLATEROW_SSE2)
if (TestCpuFlag(kCpuHasSSE2) && dst_width >= 16) { if (TestCpuFlag(kCpuHasSSE2) && dst_width >= 16) {
InterpolateRow = InterpolateRow_Any_SSE2; InterpolateRow = InterpolateRow_Any_SSE2;
@ -618,9 +632,6 @@ void ScalePlaneBilinearUp(int src_width, int src_height,
} }
#endif #endif
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) { if (filtering && src_width >= 32768) {
ScaleFilterCols = ScaleFilterCols64_C; ScaleFilterCols = ScaleFilterCols64_C;
} }
@ -640,55 +651,55 @@ void ScalePlaneBilinearUp(int src_width, int src_height,
#endif #endif
} }
const int max_y = (src_height - 1) << 16;
if (y > max_y) { if (y > max_y) {
y = max_y; y = max_y;
} }
int yi = y >> 16; {
const uint8* src = src_ptr + yi * src_stride; int yi = y >> 16;
const uint8* src = src_ptr + yi * src_stride;
// Allocate 2 row buffers. // Allocate 2 row buffers.
const int kRowSize = (dst_width + 15) & ~15; const int kRowSize = (dst_width + 15) & ~15;
align_buffer_64(row, kRowSize * 2); align_buffer_64(row, kRowSize * 2);
uint8* rowptr = row; uint8* rowptr = row;
int rowstride = kRowSize; int rowstride = kRowSize;
int lasty = yi; int lasty = yi;
ScaleFilterCols(rowptr, src, dst_width, x, dx); ScaleFilterCols(rowptr, src, dst_width, x, dx);
if (src_height > 1) { if (src_height > 1) {
src += src_stride;
}
ScaleFilterCols(rowptr + rowstride, src, dst_width, x, dx);
src += src_stride; src += src_stride;
}
ScaleFilterCols(rowptr + rowstride, src, dst_width, x, dx);
src += src_stride;
int j; for (j = 0; j < dst_height; ++j) {
for (j = 0; j < dst_height; ++j) { yi = y >> 16;
yi = y >> 16;
if (yi != lasty) {
if (y > max_y) {
y = max_y;
yi = y >> 16;
src = src_ptr + yi * src_stride;
}
if (yi != lasty) { if (yi != lasty) {
ScaleFilterCols(rowptr, src, dst_width, x, dx); if (y > max_y) {
rowptr += rowstride; y = max_y;
rowstride = -rowstride; yi = y >> 16;
lasty = yi; src = src_ptr + yi * src_stride;
src += src_stride; }
if (yi != lasty) {
ScaleFilterCols(rowptr, src, dst_width, x, dx);
rowptr += rowstride;
rowstride = -rowstride;
lasty = yi;
src += src_stride;
}
} }
if (filtering == kFilterLinear) {
InterpolateRow(dst_ptr, rowptr, 0, dst_width, 0);
} else {
int yf = (y >> 8) & 255;
InterpolateRow(dst_ptr, rowptr, rowstride, dst_width, yf);
}
dst_ptr += dst_stride;
y += dy;
} }
if (filtering == kFilterLinear) { free_aligned_buffer_64(row);
InterpolateRow(dst_ptr, rowptr, 0, dst_width, 0);
} else {
int yf = (y >> 8) & 255;
InterpolateRow(dst_ptr, rowptr, rowstride, dst_width, yf);
}
dst_ptr += dst_stride;
y += dy;
} }
free_aligned_buffer_64(row);
} }
// Scale Plane to/from any dimensions, without interpolation. // Scale Plane to/from any dimensions, without interpolation.
@ -700,6 +711,9 @@ static void ScalePlaneSimple(int src_width, int src_height,
int dst_width, int dst_height, int dst_width, int dst_height,
int src_stride, int dst_stride, int src_stride, int dst_stride,
const uint8* src_ptr, uint8* dst_ptr) { const uint8* src_ptr, uint8* dst_ptr) {
int i;
void (*ScaleCols)(uint8* dst_ptr, const uint8* src_ptr,
int dst_width, int x, int dx) = ScaleCols_C;
// Initial source x/y coordinate and step values as 16.16 fixed point. // Initial source x/y coordinate and step values as 16.16 fixed point.
int x = 0; int x = 0;
int y = 0; int y = 0;
@ -709,8 +723,6 @@ static void ScalePlaneSimple(int src_width, int src_height,
&x, &y, &dx, &dy); &x, &y, &dx, &dy);
src_width = Abs(src_width); src_width = Abs(src_width);
void (*ScaleCols)(uint8* dst_ptr, const uint8* src_ptr,
int dst_width, int x, int dx) = ScaleCols_C;
if (src_width * 2 == dst_width && x < 0x8000) { if (src_width * 2 == dst_width && x < 0x8000) {
ScaleCols = ScaleColsUp2_C; ScaleCols = ScaleColsUp2_C;
#if defined(HAS_SCALECOLS_SSE2) #if defined(HAS_SCALECOLS_SSE2)
@ -722,7 +734,6 @@ static void ScalePlaneSimple(int src_width, int src_height,
#endif #endif
} }
int i;
for (i = 0; i < dst_height; ++i) { for (i = 0; i < dst_height; ++i) {
ScaleCols(dst_ptr, src_ptr + (y >> 16) * src_stride, ScaleCols(dst_ptr, src_ptr + (y >> 16) * src_stride,
dst_width, x, dx); dst_width, x, dx);
@ -831,14 +842,14 @@ int I420Scale(const uint8* src_y, int src_stride_y,
uint8* dst_v, int dst_stride_v, uint8* dst_v, int dst_stride_v,
int dst_width, int dst_height, int dst_width, int dst_height,
enum FilterMode filtering) { enum FilterMode filtering) {
if (!src_y || !src_u || !src_v || src_width == 0 || src_height == 0 ||
!dst_y || !dst_u || !dst_v || dst_width <= 0 || dst_height <= 0) {
return -1;
}
int src_halfwidth = SUBSAMPLE(src_width, 1, 1); int src_halfwidth = SUBSAMPLE(src_width, 1, 1);
int src_halfheight = SUBSAMPLE(src_height, 1, 1); int src_halfheight = SUBSAMPLE(src_height, 1, 1);
int dst_halfwidth = SUBSAMPLE(dst_width, 1, 1); int dst_halfwidth = SUBSAMPLE(dst_width, 1, 1);
int dst_halfheight = SUBSAMPLE(dst_height, 1, 1); int dst_halfheight = SUBSAMPLE(dst_height, 1, 1);
if (!src_y || !src_u || !src_v || src_width == 0 || src_height == 0 ||
!dst_y || !dst_u || !dst_v || dst_width <= 0 || dst_height <= 0) {
return -1;
}
ScalePlane(src_y, src_stride_y, src_width, src_height, ScalePlane(src_y, src_stride_y, src_width, src_height,
dst_y, dst_stride_y, dst_width, dst_height, dst_y, dst_stride_y, dst_width, dst_height,
@ -877,26 +888,27 @@ LIBYUV_API
int ScaleOffset(const uint8* src, int src_width, int src_height, int ScaleOffset(const uint8* src, int src_width, int src_height,
uint8* dst, int dst_width, int dst_height, int dst_yoffset, uint8* dst, int dst_width, int dst_height, int dst_yoffset,
LIBYUV_BOOL interpolate) { LIBYUV_BOOL interpolate) {
if (!src || src_width <= 0 || src_height <= 0 || // Chroma requires offset to multiple of 2.
!dst || dst_width <= 0 || dst_height <= 0 || dst_yoffset < 0 || int dst_yoffset_even = dst_yoffset & ~1;
dst_yoffset >= dst_height) {
return -1;
}
dst_yoffset = dst_yoffset & ~1; // chroma requires offset to multiple of 2.
int src_halfwidth = SUBSAMPLE(src_width, 1, 1); int src_halfwidth = SUBSAMPLE(src_width, 1, 1);
int src_halfheight = SUBSAMPLE(src_height, 1, 1); int src_halfheight = SUBSAMPLE(src_height, 1, 1);
int dst_halfwidth = SUBSAMPLE(dst_width, 1, 1); int dst_halfwidth = SUBSAMPLE(dst_width, 1, 1);
int dst_halfheight = SUBSAMPLE(dst_height, 1, 1); int dst_halfheight = SUBSAMPLE(dst_height, 1, 1);
int aheight = dst_height - dst_yoffset * 2; // actual output height int aheight = dst_height - dst_yoffset_even * 2; // actual output height
const uint8* src_y = src; const uint8* src_y = src;
const uint8* src_u = src + src_width * src_height; const uint8* src_u = src + src_width * src_height;
const uint8* src_v = src + src_width * src_height + const uint8* src_v = src + src_width * src_height +
src_halfwidth * src_halfheight; src_halfwidth * src_halfheight;
uint8* dst_y = dst + dst_yoffset * dst_width; uint8* dst_y = dst + dst_yoffset_even * dst_width;
uint8* dst_u = dst + dst_width * dst_height + uint8* dst_u = dst + dst_width * dst_height +
(dst_yoffset >> 1) * dst_halfwidth; (dst_yoffset_even >> 1) * dst_halfwidth;
uint8* dst_v = dst + dst_width * dst_height + dst_halfwidth * dst_halfheight + uint8* dst_v = dst + dst_width * dst_height + dst_halfwidth * dst_halfheight +
(dst_yoffset >> 1) * dst_halfwidth; (dst_yoffset_even >> 1) * dst_halfwidth;
if (!src || src_width <= 0 || src_height <= 0 ||
!dst || dst_width <= 0 || dst_height <= 0 || dst_yoffset_even < 0 ||
dst_yoffset_even >= dst_height) {
return -1;
}
return I420Scale(src_y, src_width, return I420Scale(src_y, src_width,
src_u, src_halfwidth, src_u, src_halfwidth,
src_v, src_halfwidth, src_v, src_halfwidth,