| /* |
| * Copyright 2011 The LibYuv Project Authors. All rights reserved. |
| * |
| * Use of this source code is governed by a BSD-style license |
| * that can be found in the LICENSE file in the root of the source |
| * tree. An additional intellectual property rights grant can be found |
| * in the file PATENTS. All contributing project authors may |
| * be found in the AUTHORS file in the root of the source tree. |
| */ |
| |
| #include "libyuv/scale.h" |
| |
| #include <assert.h> |
| #include <string.h> |
| |
| #include "libyuv/cpu_id.h" |
| #include "libyuv/planar_functions.h" // For CopyPlane |
| #include "libyuv/row.h" |
| #include "libyuv/scale_row.h" |
| |
| #ifdef __cplusplus |
| namespace libyuv { |
| extern "C" { |
| #endif |
| |
| static __inline int Abs(int v) { |
| return v >= 0 ? v : -v; |
| } |
| |
| #define SUBSAMPLE(v, a, s) (v < 0) ? (-((-v + a) >> s)) : ((v + a) >> s) |
| |
| // Scale plane, 1/2 |
| // This is an optimized version for scaling down a plane to 1/2 of |
| // its original size. |
| |
| static void ScalePlaneDown2(int src_width, int src_height, |
| int dst_width, int dst_height, |
| int src_stride, int dst_stride, |
| const uint8* src_ptr, uint8* dst_ptr, |
| enum FilterMode filtering) { |
| int y; |
| void (*ScaleRowDown2)(const uint8* src_ptr, ptrdiff_t src_stride, |
| uint8* dst_ptr, int dst_width) = |
| filtering == kFilterNone ? ScaleRowDown2_C : |
| (filtering == kFilterLinear ? ScaleRowDown2Linear_C : ScaleRowDown2Box_C); |
| int row_stride = src_stride << 1; |
| if (!filtering) { |
| src_ptr += src_stride; // Point to odd rows. |
| src_stride = 0; |
| } |
| |
| #if defined(HAS_SCALEROWDOWN2_NEON) |
| if (TestCpuFlag(kCpuHasNEON)) { |
| ScaleRowDown2 = filtering == kFilterNone ? ScaleRowDown2_Any_NEON : |
| (filtering == kFilterLinear ? ScaleRowDown2Linear_Any_NEON : |
| ScaleRowDown2Box_Any_NEON); |
| if (IS_ALIGNED(dst_width, 16)) { |
| ScaleRowDown2 = filtering == kFilterNone ? ScaleRowDown2_NEON : |
| (filtering == kFilterLinear ? ScaleRowDown2Linear_NEON : |
| ScaleRowDown2Box_NEON); |
| } |
| } |
| #endif |
| #if defined(HAS_SCALEROWDOWN2_SSE2) |
| if (TestCpuFlag(kCpuHasSSE2)) { |
| ScaleRowDown2 = filtering == kFilterNone ? ScaleRowDown2_Any_SSE2 : |
| (filtering == kFilterLinear ? ScaleRowDown2Linear_Any_SSE2 : |
| ScaleRowDown2Box_Any_SSE2); |
| if (IS_ALIGNED(dst_width, 16)) { |
| ScaleRowDown2 = filtering == kFilterNone ? ScaleRowDown2_SSE2 : |
| (filtering == kFilterLinear ? ScaleRowDown2Linear_SSE2 : |
| ScaleRowDown2Box_SSE2); |
| } |
| } |
| #endif |
| #if defined(HAS_SCALEROWDOWN2_AVX2) |
| if (TestCpuFlag(kCpuHasAVX2)) { |
| ScaleRowDown2 = filtering == kFilterNone ? ScaleRowDown2_Any_AVX2 : |
| (filtering == kFilterLinear ? ScaleRowDown2Linear_Any_AVX2 : |
| ScaleRowDown2Box_Any_AVX2); |
| if (IS_ALIGNED(dst_width, 32)) { |
| ScaleRowDown2 = filtering == kFilterNone ? ScaleRowDown2_AVX2 : |
| (filtering == kFilterLinear ? ScaleRowDown2Linear_AVX2 : |
| ScaleRowDown2Box_AVX2); |
| } |
| } |
| #endif |
| #if defined(HAS_SCALEROWDOWN2_MIPS_DSPR2) |
| if (TestCpuFlag(kCpuHasMIPS_DSPR2) && IS_ALIGNED(src_ptr, 4) && |
| IS_ALIGNED(src_stride, 4) && IS_ALIGNED(row_stride, 4) && |
| IS_ALIGNED(dst_ptr, 4) && IS_ALIGNED(dst_stride, 4)) { |
| ScaleRowDown2 = filtering ? |
| ScaleRowDown2Box_MIPS_DSPR2 : ScaleRowDown2_MIPS_DSPR2; |
| } |
| #endif |
| |
| if (filtering == kFilterLinear) { |
| src_stride = 0; |
| } |
| // TODO(fbarchard): Loop through source height to allow odd height. |
| for (y = 0; y < dst_height; ++y) { |
| ScaleRowDown2(src_ptr, src_stride, dst_ptr, dst_width); |
| src_ptr += row_stride; |
| dst_ptr += dst_stride; |
| } |
| } |
| |
| static void ScalePlaneDown2_16(int src_width, int src_height, |
| int dst_width, int dst_height, |
| int src_stride, int dst_stride, |
| const uint16* src_ptr, uint16* dst_ptr, |
| enum FilterMode filtering) { |
| int y; |
| void (*ScaleRowDown2)(const uint16* src_ptr, ptrdiff_t src_stride, |
| uint16* dst_ptr, int dst_width) = |
| filtering == kFilterNone ? ScaleRowDown2_16_C : |
| (filtering == kFilterLinear ? ScaleRowDown2Linear_16_C : |
| ScaleRowDown2Box_16_C); |
| int row_stride = src_stride << 1; |
| if (!filtering) { |
| src_ptr += src_stride; // Point to odd rows. |
| src_stride = 0; |
| } |
| |
| #if defined(HAS_SCALEROWDOWN2_16_NEON) |
| if (TestCpuFlag(kCpuHasNEON) && IS_ALIGNED(dst_width, 16)) { |
| ScaleRowDown2 = filtering ? ScaleRowDown2Box_16_NEON : |
| ScaleRowDown2_16_NEON; |
| } |
| #endif |
| #if defined(HAS_SCALEROWDOWN2_16_SSE2) |
| if (TestCpuFlag(kCpuHasSSE2) && IS_ALIGNED(dst_width, 16)) { |
| ScaleRowDown2 = filtering == kFilterNone ? ScaleRowDown2_16_SSE2 : |
| (filtering == kFilterLinear ? ScaleRowDown2Linear_16_SSE2 : |
| ScaleRowDown2Box_16_SSE2); |
| } |
| #endif |
| #if defined(HAS_SCALEROWDOWN2_16_MIPS_DSPR2) |
| if (TestCpuFlag(kCpuHasMIPS_DSPR2) && IS_ALIGNED(src_ptr, 4) && |
| IS_ALIGNED(src_stride, 4) && IS_ALIGNED(row_stride, 4) && |
| IS_ALIGNED(dst_ptr, 4) && IS_ALIGNED(dst_stride, 4)) { |
| ScaleRowDown2 = filtering ? |
| ScaleRowDown2Box_16_MIPS_DSPR2 : ScaleRowDown2_16_MIPS_DSPR2; |
| } |
| #endif |
| |
| if (filtering == kFilterLinear) { |
| src_stride = 0; |
| } |
| // TODO(fbarchard): Loop through source height to allow odd height. |
| for (y = 0; y < dst_height; ++y) { |
| ScaleRowDown2(src_ptr, src_stride, dst_ptr, dst_width); |
| src_ptr += row_stride; |
| dst_ptr += dst_stride; |
| } |
| } |
| |
| // Scale plane, 1/4 |
| // This is an optimized version for scaling down a plane to 1/4 of |
| // its original size. |
| |
| static void ScalePlaneDown4(int src_width, int src_height, |
| int dst_width, int dst_height, |
| int src_stride, int dst_stride, |
| const uint8* src_ptr, uint8* dst_ptr, |
| enum FilterMode filtering) { |
| int y; |
| void (*ScaleRowDown4)(const uint8* src_ptr, ptrdiff_t src_stride, |
| uint8* dst_ptr, int dst_width) = |
| filtering ? ScaleRowDown4Box_C : ScaleRowDown4_C; |
| int row_stride = src_stride << 2; |
| if (!filtering) { |
| src_ptr += src_stride * 2; // Point to row 2. |
| src_stride = 0; |
| } |
| #if defined(HAS_SCALEROWDOWN4_NEON) |
| if (TestCpuFlag(kCpuHasNEON)) { |
| ScaleRowDown4 = filtering ? |
| ScaleRowDown4Box_Any_NEON : ScaleRowDown4_Any_NEON; |
| if (IS_ALIGNED(dst_width, 8)) { |
| ScaleRowDown4 = filtering ? ScaleRowDown4Box_NEON : ScaleRowDown4_NEON; |
| } |
| } |
| #endif |
| #if defined(HAS_SCALEROWDOWN4_SSE2) |
| if (TestCpuFlag(kCpuHasSSE2)) { |
| ScaleRowDown4 = filtering ? |
| ScaleRowDown4Box_Any_SSE2 : ScaleRowDown4_Any_SSE2; |
| if (IS_ALIGNED(dst_width, 8)) { |
| ScaleRowDown4 = filtering ? ScaleRowDown4Box_SSE2 : ScaleRowDown4_SSE2; |
| } |
| } |
| #endif |
| #if defined(HAS_SCALEROWDOWN4_AVX2) |
| if (TestCpuFlag(kCpuHasAVX2)) { |
| ScaleRowDown4 = filtering ? |
| ScaleRowDown4Box_Any_AVX2 : ScaleRowDown4_Any_AVX2; |
| if (IS_ALIGNED(dst_width, 16)) { |
| ScaleRowDown4 = filtering ? ScaleRowDown4Box_AVX2 : ScaleRowDown4_AVX2; |
| } |
| } |
| #endif |
| #if defined(HAS_SCALEROWDOWN4_MIPS_DSPR2) |
| if (TestCpuFlag(kCpuHasMIPS_DSPR2) && IS_ALIGNED(row_stride, 4) && |
| IS_ALIGNED(src_ptr, 4) && IS_ALIGNED(src_stride, 4) && |
| IS_ALIGNED(dst_ptr, 4) && IS_ALIGNED(dst_stride, 4)) { |
| ScaleRowDown4 = filtering ? |
| ScaleRowDown4Box_MIPS_DSPR2 : ScaleRowDown4_MIPS_DSPR2; |
| } |
| #endif |
| |
| if (filtering == kFilterLinear) { |
| src_stride = 0; |
| } |
| for (y = 0; y < dst_height; ++y) { |
| ScaleRowDown4(src_ptr, src_stride, dst_ptr, dst_width); |
| src_ptr += row_stride; |
| dst_ptr += dst_stride; |
| } |
| } |
| |
| static void ScalePlaneDown4_16(int src_width, int src_height, |
| int dst_width, int dst_height, |
| int src_stride, int dst_stride, |
| const uint16* src_ptr, uint16* dst_ptr, |
| enum FilterMode filtering) { |
| int y; |
| void (*ScaleRowDown4)(const uint16* src_ptr, ptrdiff_t src_stride, |
| uint16* dst_ptr, int dst_width) = |
| filtering ? ScaleRowDown4Box_16_C : ScaleRowDown4_16_C; |
| int row_stride = src_stride << 2; |
| if (!filtering) { |
| src_ptr += src_stride * 2; // Point to row 2. |
| src_stride = 0; |
| } |
| #if defined(HAS_SCALEROWDOWN4_16_NEON) |
| if (TestCpuFlag(kCpuHasNEON) && IS_ALIGNED(dst_width, 8)) { |
| ScaleRowDown4 = filtering ? ScaleRowDown4Box_16_NEON : |
| ScaleRowDown4_16_NEON; |
| } |
| #endif |
| #if defined(HAS_SCALEROWDOWN4_16_SSE2) |
| if (TestCpuFlag(kCpuHasSSE2) && IS_ALIGNED(dst_width, 8)) { |
| ScaleRowDown4 = filtering ? ScaleRowDown4Box_16_SSE2 : |
| ScaleRowDown4_16_SSE2; |
| } |
| #endif |
| #if defined(HAS_SCALEROWDOWN4_16_MIPS_DSPR2) |
| if (TestCpuFlag(kCpuHasMIPS_DSPR2) && IS_ALIGNED(row_stride, 4) && |
| IS_ALIGNED(src_ptr, 4) && IS_ALIGNED(src_stride, 4) && |
| IS_ALIGNED(dst_ptr, 4) && IS_ALIGNED(dst_stride, 4)) { |
| ScaleRowDown4 = filtering ? |
| ScaleRowDown4Box_16_MIPS_DSPR2 : ScaleRowDown4_16_MIPS_DSPR2; |
| } |
| #endif |
| |
| if (filtering == kFilterLinear) { |
| src_stride = 0; |
| } |
| for (y = 0; y < dst_height; ++y) { |
| ScaleRowDown4(src_ptr, src_stride, dst_ptr, dst_width); |
| src_ptr += row_stride; |
| dst_ptr += dst_stride; |
| } |
| } |
| |
| // Scale plane down, 3/4 |
| |
| static void ScalePlaneDown34(int src_width, int src_height, |
| int dst_width, int dst_height, |
| int src_stride, int dst_stride, |
| const uint8* src_ptr, uint8* dst_ptr, |
| enum FilterMode filtering) { |
| int y; |
| void (*ScaleRowDown34_0)(const uint8* src_ptr, ptrdiff_t src_stride, |
| uint8* dst_ptr, int dst_width); |
| void (*ScaleRowDown34_1)(const uint8* src_ptr, ptrdiff_t src_stride, |
| uint8* dst_ptr, int dst_width); |
| const int filter_stride = (filtering == kFilterLinear) ? 0 : src_stride; |
| assert(dst_width % 3 == 0); |
| if (!filtering) { |
| ScaleRowDown34_0 = ScaleRowDown34_C; |
| ScaleRowDown34_1 = ScaleRowDown34_C; |
| } else { |
| ScaleRowDown34_0 = ScaleRowDown34_0_Box_C; |
| ScaleRowDown34_1 = ScaleRowDown34_1_Box_C; |
| } |
| #if defined(HAS_SCALEROWDOWN34_NEON) |
| if (TestCpuFlag(kCpuHasNEON)) { |
| if (!filtering) { |
| ScaleRowDown34_0 = ScaleRowDown34_Any_NEON; |
| ScaleRowDown34_1 = ScaleRowDown34_Any_NEON; |
| } else { |
| ScaleRowDown34_0 = ScaleRowDown34_0_Box_Any_NEON; |
| ScaleRowDown34_1 = ScaleRowDown34_1_Box_Any_NEON; |
| } |
| if (dst_width % 24 == 0) { |
| if (!filtering) { |
| ScaleRowDown34_0 = ScaleRowDown34_NEON; |
| ScaleRowDown34_1 = ScaleRowDown34_NEON; |
| } else { |
| ScaleRowDown34_0 = ScaleRowDown34_0_Box_NEON; |
| ScaleRowDown34_1 = ScaleRowDown34_1_Box_NEON; |
| } |
| } |
| } |
| #endif |
| #if defined(HAS_SCALEROWDOWN34_SSSE3) |
| if (TestCpuFlag(kCpuHasSSSE3)) { |
| if (!filtering) { |
| ScaleRowDown34_0 = ScaleRowDown34_Any_SSSE3; |
| ScaleRowDown34_1 = ScaleRowDown34_Any_SSSE3; |
| } else { |
| ScaleRowDown34_0 = ScaleRowDown34_0_Box_Any_SSSE3; |
| ScaleRowDown34_1 = ScaleRowDown34_1_Box_Any_SSSE3; |
| } |
| if (dst_width % 24 == 0) { |
| if (!filtering) { |
| ScaleRowDown34_0 = ScaleRowDown34_SSSE3; |
| ScaleRowDown34_1 = ScaleRowDown34_SSSE3; |
| } else { |
| ScaleRowDown34_0 = ScaleRowDown34_0_Box_SSSE3; |
| ScaleRowDown34_1 = ScaleRowDown34_1_Box_SSSE3; |
| } |
| } |
| } |
| #endif |
| #if defined(HAS_SCALEROWDOWN34_MIPS_DSPR2) |
| if (TestCpuFlag(kCpuHasMIPS_DSPR2) && (dst_width % 24 == 0) && |
| IS_ALIGNED(src_ptr, 4) && IS_ALIGNED(src_stride, 4) && |
| IS_ALIGNED(dst_ptr, 4) && IS_ALIGNED(dst_stride, 4)) { |
| if (!filtering) { |
| ScaleRowDown34_0 = ScaleRowDown34_MIPS_DSPR2; |
| ScaleRowDown34_1 = ScaleRowDown34_MIPS_DSPR2; |
| } else { |
| ScaleRowDown34_0 = ScaleRowDown34_0_Box_MIPS_DSPR2; |
| ScaleRowDown34_1 = ScaleRowDown34_1_Box_MIPS_DSPR2; |
| } |
| } |
| #endif |
| |
| for (y = 0; y < dst_height - 2; y += 3) { |
| ScaleRowDown34_0(src_ptr, filter_stride, dst_ptr, dst_width); |
| src_ptr += src_stride; |
| dst_ptr += dst_stride; |
| ScaleRowDown34_1(src_ptr, filter_stride, dst_ptr, dst_width); |
| src_ptr += src_stride; |
| dst_ptr += dst_stride; |
| ScaleRowDown34_0(src_ptr + src_stride, -filter_stride, |
| dst_ptr, dst_width); |
| src_ptr += src_stride * 2; |
| dst_ptr += dst_stride; |
| } |
| |
| // Remainder 1 or 2 rows with last row vertically unfiltered |
| if ((dst_height % 3) == 2) { |
| ScaleRowDown34_0(src_ptr, filter_stride, dst_ptr, dst_width); |
| src_ptr += src_stride; |
| dst_ptr += dst_stride; |
| ScaleRowDown34_1(src_ptr, 0, dst_ptr, dst_width); |
| } else if ((dst_height % 3) == 1) { |
| ScaleRowDown34_0(src_ptr, 0, dst_ptr, dst_width); |
| } |
| } |
| |
| static void ScalePlaneDown34_16(int src_width, int src_height, |
| int dst_width, int dst_height, |
| int src_stride, int dst_stride, |
| const uint16* src_ptr, uint16* dst_ptr, |
| enum FilterMode filtering) { |
| int y; |
| void (*ScaleRowDown34_0)(const uint16* src_ptr, ptrdiff_t src_stride, |
| uint16* dst_ptr, int dst_width); |
| void (*ScaleRowDown34_1)(const uint16* src_ptr, ptrdiff_t src_stride, |
| uint16* dst_ptr, int dst_width); |
| const int filter_stride = (filtering == kFilterLinear) ? 0 : src_stride; |
| assert(dst_width % 3 == 0); |
| if (!filtering) { |
| ScaleRowDown34_0 = ScaleRowDown34_16_C; |
| ScaleRowDown34_1 = ScaleRowDown34_16_C; |
| } else { |
| ScaleRowDown34_0 = ScaleRowDown34_0_Box_16_C; |
| ScaleRowDown34_1 = ScaleRowDown34_1_Box_16_C; |
| } |
| #if defined(HAS_SCALEROWDOWN34_16_NEON) |
| if (TestCpuFlag(kCpuHasNEON) && (dst_width % 24 == 0)) { |
| if (!filtering) { |
| ScaleRowDown34_0 = ScaleRowDown34_16_NEON; |
| ScaleRowDown34_1 = ScaleRowDown34_16_NEON; |
| } else { |
| ScaleRowDown34_0 = ScaleRowDown34_0_Box_16_NEON; |
| ScaleRowDown34_1 = ScaleRowDown34_1_Box_16_NEON; |
| } |
| } |
| #endif |
| #if defined(HAS_SCALEROWDOWN34_16_SSSE3) |
| if (TestCpuFlag(kCpuHasSSSE3) && (dst_width % 24 == 0)) { |
| if (!filtering) { |
| ScaleRowDown34_0 = ScaleRowDown34_16_SSSE3; |
| ScaleRowDown34_1 = ScaleRowDown34_16_SSSE3; |
| } else { |
| ScaleRowDown34_0 = ScaleRowDown34_0_Box_16_SSSE3; |
| ScaleRowDown34_1 = ScaleRowDown34_1_Box_16_SSSE3; |
| } |
| } |
| #endif |
| #if defined(HAS_SCALEROWDOWN34_16_MIPS_DSPR2) |
| if (TestCpuFlag(kCpuHasMIPS_DSPR2) && (dst_width % 24 == 0) && |
| IS_ALIGNED(src_ptr, 4) && IS_ALIGNED(src_stride, 4) && |
| IS_ALIGNED(dst_ptr, 4) && IS_ALIGNED(dst_stride, 4)) { |
| if (!filtering) { |
| ScaleRowDown34_0 = ScaleRowDown34_16_MIPS_DSPR2; |
| ScaleRowDown34_1 = ScaleRowDown34_16_MIPS_DSPR2; |
| } else { |
| ScaleRowDown34_0 = ScaleRowDown34_0_Box_16_MIPS_DSPR2; |
| ScaleRowDown34_1 = ScaleRowDown34_1_Box_16_MIPS_DSPR2; |
| } |
| } |
| #endif |
| |
| for (y = 0; y < dst_height - 2; y += 3) { |
| ScaleRowDown34_0(src_ptr, filter_stride, dst_ptr, dst_width); |
| src_ptr += src_stride; |
| dst_ptr += dst_stride; |
| ScaleRowDown34_1(src_ptr, filter_stride, dst_ptr, dst_width); |
| src_ptr += src_stride; |
| dst_ptr += dst_stride; |
| ScaleRowDown34_0(src_ptr + src_stride, -filter_stride, |
| dst_ptr, dst_width); |
| src_ptr += src_stride * 2; |
| dst_ptr += dst_stride; |
| } |
| |
| // Remainder 1 or 2 rows with last row vertically unfiltered |
| if ((dst_height % 3) == 2) { |
| ScaleRowDown34_0(src_ptr, filter_stride, dst_ptr, dst_width); |
| src_ptr += src_stride; |
| dst_ptr += dst_stride; |
| ScaleRowDown34_1(src_ptr, 0, dst_ptr, dst_width); |
| } else if ((dst_height % 3) == 1) { |
| ScaleRowDown34_0(src_ptr, 0, dst_ptr, dst_width); |
| } |
| } |
| |
| |
| // Scale plane, 3/8 |
| // This is an optimized version for scaling down a plane to 3/8 |
| // of its original size. |
| // |
| // Uses box filter arranges like this |
| // aaabbbcc -> abc |
| // aaabbbcc def |
| // aaabbbcc ghi |
| // dddeeeff |
| // dddeeeff |
| // dddeeeff |
| // ggghhhii |
| // ggghhhii |
| // Boxes are 3x3, 2x3, 3x2 and 2x2 |
| |
| static void ScalePlaneDown38(int src_width, int src_height, |
| int dst_width, int dst_height, |
| int src_stride, int dst_stride, |
| const uint8* src_ptr, uint8* dst_ptr, |
| enum FilterMode filtering) { |
| int y; |
| void (*ScaleRowDown38_3)(const uint8* src_ptr, ptrdiff_t src_stride, |
| uint8* dst_ptr, int dst_width); |
| void (*ScaleRowDown38_2)(const uint8* src_ptr, ptrdiff_t src_stride, |
| uint8* dst_ptr, int dst_width); |
| const int filter_stride = (filtering == kFilterLinear) ? 0 : src_stride; |
| assert(dst_width % 3 == 0); |
| if (!filtering) { |
| ScaleRowDown38_3 = ScaleRowDown38_C; |
| ScaleRowDown38_2 = ScaleRowDown38_C; |
| } else { |
| ScaleRowDown38_3 = ScaleRowDown38_3_Box_C; |
| ScaleRowDown38_2 = ScaleRowDown38_2_Box_C; |
| } |
| |
| #if defined(HAS_SCALEROWDOWN38_NEON) |
| if (TestCpuFlag(kCpuHasNEON)) { |
| if (!filtering) { |
| ScaleRowDown38_3 = ScaleRowDown38_Any_NEON; |
| ScaleRowDown38_2 = ScaleRowDown38_Any_NEON; |
| } else { |
| ScaleRowDown38_3 = ScaleRowDown38_3_Box_Any_NEON; |
| ScaleRowDown38_2 = ScaleRowDown38_2_Box_Any_NEON; |
| } |
| if (dst_width % 12 == 0) { |
| if (!filtering) { |
| ScaleRowDown38_3 = ScaleRowDown38_NEON; |
| ScaleRowDown38_2 = ScaleRowDown38_NEON; |
| } else { |
| ScaleRowDown38_3 = ScaleRowDown38_3_Box_NEON; |
| ScaleRowDown38_2 = ScaleRowDown38_2_Box_NEON; |
| } |
| } |
| } |
| #endif |
| #if defined(HAS_SCALEROWDOWN38_SSSE3) |
| if (TestCpuFlag(kCpuHasSSSE3)) { |
| if (!filtering) { |
| ScaleRowDown38_3 = ScaleRowDown38_Any_SSSE3; |
| ScaleRowDown38_2 = ScaleRowDown38_Any_SSSE3; |
| } else { |
| ScaleRowDown38_3 = ScaleRowDown38_3_Box_Any_SSSE3; |
| ScaleRowDown38_2 = ScaleRowDown38_2_Box_Any_SSSE3; |
| } |
| if (dst_width % 12 == 0 && !filtering) { |
| ScaleRowDown38_3 = ScaleRowDown38_SSSE3; |
| ScaleRowDown38_2 = ScaleRowDown38_SSSE3; |
| } |
| if (dst_width % 6 == 0 && filtering) { |
| ScaleRowDown38_3 = ScaleRowDown38_3_Box_SSSE3; |
| ScaleRowDown38_2 = ScaleRowDown38_2_Box_SSSE3; |
| } |
| } |
| #endif |
| #if defined(HAS_SCALEROWDOWN38_MIPS_DSPR2) |
| if (TestCpuFlag(kCpuHasMIPS_DSPR2) && (dst_width % 12 == 0) && |
| IS_ALIGNED(src_ptr, 4) && IS_ALIGNED(src_stride, 4) && |
| IS_ALIGNED(dst_ptr, 4) && IS_ALIGNED(dst_stride, 4)) { |
| if (!filtering) { |
| ScaleRowDown38_3 = ScaleRowDown38_MIPS_DSPR2; |
| ScaleRowDown38_2 = ScaleRowDown38_MIPS_DSPR2; |
| } else { |
| ScaleRowDown38_3 = ScaleRowDown38_3_Box_MIPS_DSPR2; |
| ScaleRowDown38_2 = ScaleRowDown38_2_Box_MIPS_DSPR2; |
| } |
| } |
| #endif |
| |
| for (y = 0; y < dst_height - 2; y += 3) { |
| ScaleRowDown38_3(src_ptr, filter_stride, dst_ptr, dst_width); |
| src_ptr += src_stride * 3; |
| dst_ptr += dst_stride; |
| ScaleRowDown38_3(src_ptr, filter_stride, dst_ptr, dst_width); |
| src_ptr += src_stride * 3; |
| dst_ptr += dst_stride; |
| ScaleRowDown38_2(src_ptr, filter_stride, dst_ptr, dst_width); |
| src_ptr += src_stride * 2; |
| dst_ptr += dst_stride; |
| } |
| |
| // Remainder 1 or 2 rows with last row vertically unfiltered |
| if ((dst_height % 3) == 2) { |
| ScaleRowDown38_3(src_ptr, filter_stride, dst_ptr, dst_width); |
| src_ptr += src_stride * 3; |
| dst_ptr += dst_stride; |
| ScaleRowDown38_3(src_ptr, 0, dst_ptr, dst_width); |
| } else if ((dst_height % 3) == 1) { |
| ScaleRowDown38_3(src_ptr, 0, dst_ptr, dst_width); |
| } |
| } |
| |
| static void ScalePlaneDown38_16(int src_width, int src_height, |
| int dst_width, int dst_height, |
| int src_stride, int dst_stride, |
| const uint16* src_ptr, uint16* dst_ptr, |
| enum FilterMode filtering) { |
| int y; |
| void (*ScaleRowDown38_3)(const uint16* src_ptr, ptrdiff_t src_stride, |
| uint16* dst_ptr, int dst_width); |
| void (*ScaleRowDown38_2)(const uint16* src_ptr, ptrdiff_t src_stride, |
| uint16* dst_ptr, int dst_width); |
| const int filter_stride = (filtering == kFilterLinear) ? 0 : src_stride; |
| assert(dst_width % 3 == 0); |
| if (!filtering) { |
| ScaleRowDown38_3 = ScaleRowDown38_16_C; |
| ScaleRowDown38_2 = ScaleRowDown38_16_C; |
| } else { |
| ScaleRowDown38_3 = ScaleRowDown38_3_Box_16_C; |
| ScaleRowDown38_2 = ScaleRowDown38_2_Box_16_C; |
| } |
| #if defined(HAS_SCALEROWDOWN38_16_NEON) |
| if (TestCpuFlag(kCpuHasNEON) && (dst_width % 12 == 0)) { |
| if (!filtering) { |
| ScaleRowDown38_3 = ScaleRowDown38_16_NEON; |
| ScaleRowDown38_2 = ScaleRowDown38_16_NEON; |
| } else { |
| ScaleRowDown38_3 = ScaleRowDown38_3_Box_16_NEON; |
| ScaleRowDown38_2 = ScaleRowDown38_2_Box_16_NEON; |
| } |
| } |
| #endif |
| #if defined(HAS_SCALEROWDOWN38_16_SSSE3) |
| if (TestCpuFlag(kCpuHasSSSE3) && (dst_width % 24 == 0)) { |
| if (!filtering) { |
| ScaleRowDown38_3 = ScaleRowDown38_16_SSSE3; |
| ScaleRowDown38_2 = ScaleRowDown38_16_SSSE3; |
| } else { |
| ScaleRowDown38_3 = ScaleRowDown38_3_Box_16_SSSE3; |
| ScaleRowDown38_2 = ScaleRowDown38_2_Box_16_SSSE3; |
| } |
| } |
| #endif |
| #if defined(HAS_SCALEROWDOWN38_16_MIPS_DSPR2) |
| if (TestCpuFlag(kCpuHasMIPS_DSPR2) && (dst_width % 12 == 0) && |
| IS_ALIGNED(src_ptr, 4) && IS_ALIGNED(src_stride, 4) && |
| IS_ALIGNED(dst_ptr, 4) && IS_ALIGNED(dst_stride, 4)) { |
| if (!filtering) { |
| ScaleRowDown38_3 = ScaleRowDown38_16_MIPS_DSPR2; |
| ScaleRowDown38_2 = ScaleRowDown38_16_MIPS_DSPR2; |
| } else { |
| ScaleRowDown38_3 = ScaleRowDown38_3_Box_16_MIPS_DSPR2; |
| ScaleRowDown38_2 = ScaleRowDown38_2_Box_16_MIPS_DSPR2; |
| } |
| } |
| #endif |
| |
| for (y = 0; y < dst_height - 2; y += 3) { |
| ScaleRowDown38_3(src_ptr, filter_stride, dst_ptr, dst_width); |
| src_ptr += src_stride * 3; |
| dst_ptr += dst_stride; |
| ScaleRowDown38_3(src_ptr, filter_stride, dst_ptr, dst_width); |
| src_ptr += src_stride * 3; |
| dst_ptr += dst_stride; |
| ScaleRowDown38_2(src_ptr, filter_stride, dst_ptr, dst_width); |
| src_ptr += src_stride * 2; |
| dst_ptr += dst_stride; |
| } |
| |
| // Remainder 1 or 2 rows with last row vertically unfiltered |
| if ((dst_height % 3) == 2) { |
| ScaleRowDown38_3(src_ptr, filter_stride, dst_ptr, dst_width); |
| src_ptr += src_stride * 3; |
| dst_ptr += dst_stride; |
| ScaleRowDown38_3(src_ptr, 0, dst_ptr, dst_width); |
| } else if ((dst_height % 3) == 1) { |
| ScaleRowDown38_3(src_ptr, 0, dst_ptr, dst_width); |
| } |
| } |
| |
| #define MIN1(x) ((x) < 1 ? 1 : (x)) |
| |
| static __inline uint32 SumPixels(int iboxwidth, const uint16* src_ptr) { |
| uint32 sum = 0u; |
| int x; |
| assert(iboxwidth > 0); |
| for (x = 0; x < iboxwidth; ++x) { |
| sum += src_ptr[x]; |
| } |
| return sum; |
| } |
| |
| static __inline uint32 SumPixels_16(int iboxwidth, const uint32* src_ptr) { |
| uint32 sum = 0u; |
| int x; |
| assert(iboxwidth > 0); |
| for (x = 0; x < iboxwidth; ++x) { |
| sum += src_ptr[x]; |
| } |
| return sum; |
| } |
| |
| static void ScaleAddCols2_C(int dst_width, int boxheight, int x, int dx, |
| const uint16* src_ptr, uint8* dst_ptr) { |
| int i; |
| int scaletbl[2]; |
| int minboxwidth = dx >> 16; |
| int* scaleptr = scaletbl - minboxwidth; |
| int boxwidth; |
| scaletbl[0] = 65536 / (MIN1(minboxwidth) * boxheight); |
| scaletbl[1] = 65536 / (MIN1(minboxwidth + 1) * boxheight); |
| for (i = 0; i < dst_width; ++i) { |
| int ix = x >> 16; |
| x += dx; |
| boxwidth = MIN1((x >> 16) - ix); |
| *dst_ptr++ = SumPixels(boxwidth, src_ptr + ix) * scaleptr[boxwidth] >> 16; |
| } |
| } |
| |
| static void ScaleAddCols2_16_C(int dst_width, int boxheight, int x, int dx, |
| const uint32* src_ptr, uint16* dst_ptr) { |
| int i; |
| int scaletbl[2]; |
| int minboxwidth = dx >> 16; |
| int* scaleptr = scaletbl - minboxwidth; |
| int boxwidth; |
| scaletbl[0] = 65536 / (MIN1(minboxwidth) * boxheight); |
| scaletbl[1] = 65536 / (MIN1(minboxwidth + 1) * boxheight); |
| for (i = 0; i < dst_width; ++i) { |
| int ix = x >> 16; |
| x += dx; |
| boxwidth = MIN1((x >> 16) - ix); |
| *dst_ptr++ = |
| SumPixels_16(boxwidth, src_ptr + ix) * scaleptr[boxwidth] >> 16; |
| } |
| } |
| |
| static void ScaleAddCols0_C(int dst_width, int boxheight, int x, int, |
| const uint16* src_ptr, uint8* dst_ptr) { |
| int scaleval = 65536 / boxheight; |
| int i; |
| src_ptr += (x >> 16); |
| for (i = 0; i < dst_width; ++i) { |
| *dst_ptr++ = src_ptr[i] * scaleval >> 16; |
| } |
| } |
| |
| static void ScaleAddCols1_C(int dst_width, int boxheight, int x, int dx, |
| const uint16* src_ptr, uint8* dst_ptr) { |
| int boxwidth = MIN1(dx >> 16); |
| int scaleval = 65536 / (boxwidth * boxheight); |
| int i; |
| x >>= 16; |
| for (i = 0; i < dst_width; ++i) { |
| *dst_ptr++ = SumPixels(boxwidth, src_ptr + x) * scaleval >> 16; |
| x += boxwidth; |
| } |
| } |
| |
| static void ScaleAddCols1_16_C(int dst_width, int boxheight, int x, int dx, |
| const uint32* src_ptr, uint16* dst_ptr) { |
| int boxwidth = MIN1(dx >> 16); |
| int scaleval = 65536 / (boxwidth * boxheight); |
| int i; |
| for (i = 0; i < dst_width; ++i) { |
| *dst_ptr++ = SumPixels_16(boxwidth, src_ptr + x) * scaleval >> 16; |
| x += boxwidth; |
| } |
| } |
| |
| // Scale plane down to any dimensions, with interpolation. |
| // (boxfilter). |
| // |
| // Same method as SimpleScale, which is fixed point, outputting |
| // one pixel of destination using fixed point (16.16) to step |
| // through source, sampling a box of pixel with simple |
| // averaging. |
| static void ScalePlaneBox(int src_width, int src_height, |
| int dst_width, int dst_height, |
| int src_stride, int dst_stride, |
| const uint8* src_ptr, uint8* dst_ptr) { |
| int j, k; |
| // Initial source x/y coordinate and step values as 16.16 fixed point. |
| int x = 0; |
| int y = 0; |
| int dx = 0; |
| int dy = 0; |
| const int max_y = (src_height << 16); |
| ScaleSlope(src_width, src_height, dst_width, dst_height, kFilterBox, |
| &x, &y, &dx, &dy); |
| src_width = Abs(src_width); |
| { |
| // 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: |
| ((dx != 0x10000) ? ScaleAddCols1_C : ScaleAddCols0_C); |
| void (*ScaleAddRow)(const uint8* src_ptr, uint16* dst_ptr, int src_width) = |
| ScaleAddRow_C; |
| #if defined(HAS_SCALEADDROW_SSE2) |
| if (TestCpuFlag(kCpuHasSSE2)) { |
| ScaleAddRow = ScaleAddRow_Any_SSE2; |
| if (IS_ALIGNED(src_width, 16)) { |
| ScaleAddRow = ScaleAddRow_SSE2; |
| } |
| } |
| #endif |
| #if defined(HAS_SCALEADDROW_AVX2) |
| if (TestCpuFlag(kCpuHasAVX2)) { |
| ScaleAddRow = ScaleAddRow_Any_AVX2; |
| if (IS_ALIGNED(src_width, 32)) { |
| ScaleAddRow = ScaleAddRow_AVX2; |
| } |
| } |
| #endif |
| #if defined(HAS_SCALEADDROW_NEON) |
| if (TestCpuFlag(kCpuHasNEON)) { |
| ScaleAddRow = ScaleAddRow_Any_NEON; |
| if (IS_ALIGNED(src_width, 16)) { |
| ScaleAddRow = ScaleAddRow_NEON; |
| } |
| } |
| #endif |
| |
| for (j = 0; j < dst_height; ++j) { |
| int boxheight; |
| int iy = y >> 16; |
| const uint8* src = src_ptr + iy * src_stride; |
| y += dy; |
| if (y > max_y) { |
| y = max_y; |
| } |
| boxheight = MIN1((y >> 16) - iy); |
| memset(row16, 0, src_width * 2); |
| for (k = 0; k < boxheight; ++k) { |
| ScaleAddRow(src, (uint16 *)(row16), src_width); |
| src += src_stride; |
| } |
| ScaleAddCols(dst_width, boxheight, x, dx, (uint16*)(row16), dst_ptr); |
| dst_ptr += dst_stride; |
| } |
| free_aligned_buffer_64(row16); |
| } |
| } |
| |
| static void ScalePlaneBox_16(int src_width, int src_height, |
| int dst_width, int dst_height, |
| int src_stride, int dst_stride, |
| const uint16* src_ptr, uint16* dst_ptr) { |
| int j, k; |
| // Initial source x/y coordinate and step values as 16.16 fixed point. |
| int x = 0; |
| int y = 0; |
| int dx = 0; |
| int dy = 0; |
| const int max_y = (src_height << 16); |
| ScaleSlope(src_width, src_height, dst_width, dst_height, kFilterBox, |
| &x, &y, &dx, &dy); |
| src_width = Abs(src_width); |
| { |
| // Allocate a row buffer of uint32. |
| align_buffer_64(row32, src_width * 4); |
| void (*ScaleAddCols)(int dst_width, int boxheight, int x, int dx, |
| const uint32* src_ptr, uint16* dst_ptr) = |
| (dx & 0xffff) ? ScaleAddCols2_16_C: ScaleAddCols1_16_C; |
| void (*ScaleAddRow)(const uint16* src_ptr, uint32* dst_ptr, int src_width) = |
| ScaleAddRow_16_C; |
| |
| #if defined(HAS_SCALEADDROW_16_SSE2) |
| if (TestCpuFlag(kCpuHasSSE2) && IS_ALIGNED(src_width, 16)) { |
| ScaleAddRow = ScaleAddRow_16_SSE2; |
| } |
| #endif |
| |
| for (j = 0; j < dst_height; ++j) { |
| int boxheight; |
| int iy = y >> 16; |
| const uint16* src = src_ptr + iy * src_stride; |
| y += dy; |
| if (y > max_y) { |
| y = max_y; |
| } |
| boxheight = MIN1((y >> 16) - iy); |
| memset(row32, 0, src_width * 4); |
| for (k = 0; k < boxheight; ++k) { |
| ScaleAddRow(src, (uint32 *)(row32), src_width); |
| src += src_stride; |
| } |
| ScaleAddCols(dst_width, boxheight, x, dx, (uint32*)(row32), dst_ptr); |
| dst_ptr += dst_stride; |
| } |
| free_aligned_buffer_64(row32); |
| } |
| } |
| |
| // Scale plane down with bilinear interpolation. |
| void ScalePlaneBilinearDown(int src_width, int src_height, |
| int dst_width, int dst_height, |
| int src_stride, int dst_stride, |
| const uint8* src_ptr, uint8* dst_ptr, |
| enum FilterMode filtering) { |
| // Initial source x/y coordinate and step values as 16.16 fixed point. |
| int x = 0; |
| int y = 0; |
| int dx = 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, |
| &x, &y, &dx, &dy); |
| src_width = Abs(src_width); |
| |
| #if defined(HAS_INTERPOLATEROW_SSE2) |
| if (TestCpuFlag(kCpuHasSSE2)) { |
| InterpolateRow = InterpolateRow_Any_SSE2; |
| if (IS_ALIGNED(src_width, 16)) { |
| InterpolateRow = InterpolateRow_SSE2; |
| } |
| } |
| #endif |
| #if defined(HAS_INTERPOLATEROW_SSSE3) |
| if (TestCpuFlag(kCpuHasSSSE3)) { |
| InterpolateRow = InterpolateRow_Any_SSSE3; |
| if (IS_ALIGNED(src_width, 16)) { |
| InterpolateRow = InterpolateRow_SSSE3; |
| } |
| } |
| #endif |
| #if defined(HAS_INTERPOLATEROW_AVX2) |
| if (TestCpuFlag(kCpuHasAVX2)) { |
| InterpolateRow = InterpolateRow_Any_AVX2; |
| if (IS_ALIGNED(src_width, 32)) { |
| InterpolateRow = InterpolateRow_AVX2; |
| } |
| } |
| #endif |
| #if defined(HAS_INTERPOLATEROW_NEON) |
| if (TestCpuFlag(kCpuHasNEON)) { |
| InterpolateRow = InterpolateRow_Any_NEON; |
| if (IS_ALIGNED(src_width, 16)) { |
| InterpolateRow = InterpolateRow_NEON; |
| } |
| } |
| #endif |
| #if defined(HAS_INTERPOLATEROW_MIPS_DSPR2) |
| if (TestCpuFlag(kCpuHasMIPS_DSPR2)) { |
| InterpolateRow = InterpolateRow_Any_MIPS_DSPR2; |
| if (IS_ALIGNED(src_width, 4)) { |
| InterpolateRow = InterpolateRow_MIPS_DSPR2; |
| } |
| } |
| #endif |
| |
| |
| #if defined(HAS_SCALEFILTERCOLS_SSSE3) |
| if (TestCpuFlag(kCpuHasSSSE3) && src_width < 32768) { |
| ScaleFilterCols = ScaleFilterCols_SSSE3; |
| } |
| #endif |
| #if defined(HAS_SCALEFILTERCOLS_NEON) |
| if (TestCpuFlag(kCpuHasNEON) && src_width < 32768) { |
| ScaleFilterCols = ScaleFilterCols_Any_NEON; |
| if (IS_ALIGNED(dst_width, 8)) { |
| ScaleFilterCols = ScaleFilterCols_NEON; |
| } |
| } |
| #endif |
| if (y > max_y) { |
| y = max_y; |
| } |
| |
| for (j = 0; j < dst_height; ++j) { |
| int yi = y >> 16; |
| const uint8* src = src_ptr + yi * src_stride; |
| if (filtering == kFilterLinear) { |
| ScaleFilterCols(dst_ptr, src, dst_width, x, dx); |
| } else { |
| int yf = (y >> 8) & 255; |
| InterpolateRow(row, src, src_stride, src_width, yf); |
| ScaleFilterCols(dst_ptr, row, dst_width, x, dx); |
| } |
| dst_ptr += dst_stride; |
| y += dy; |
| if (y > max_y) { |
| y = max_y; |
| } |
| } |
| free_aligned_buffer_64(row); |
| } |
| |
| void ScalePlaneBilinearDown_16(int src_width, int src_height, |
| int dst_width, int dst_height, |
| int src_stride, int dst_stride, |
| const uint16* src_ptr, uint16* dst_ptr, |
| enum FilterMode filtering) { |
| // Initial source x/y coordinate and step values as 16.16 fixed point. |
| int x = 0; |
| int y = 0; |
| int dx = 0; |
| int dy = 0; |
| // TODO(fbarchard): Consider not allocating row buffer for kFilterLinear. |
| // Allocate a row buffer. |
| align_buffer_64(row, src_width * 2); |
| |
| const int max_y = (src_height - 1) << 16; |
| int j; |
| void (*ScaleFilterCols)(uint16* dst_ptr, const uint16* src_ptr, |
| int dst_width, int x, int dx) = |
| (src_width >= 32768) ? ScaleFilterCols64_16_C : ScaleFilterCols_16_C; |
| void (*InterpolateRow)(uint16* dst_ptr, const uint16* src_ptr, |
| ptrdiff_t src_stride, int dst_width, int source_y_fraction) = |
| InterpolateRow_16_C; |
| ScaleSlope(src_width, src_height, dst_width, dst_height, filtering, |
| &x, &y, &dx, &dy); |
| src_width = Abs(src_width); |
| |
| #if defined(HAS_INTERPOLATEROW_16_SSE2) |
| if (TestCpuFlag(kCpuHasSSE2)) { |
| InterpolateRow = InterpolateRow_Any_16_SSE2; |
| if (IS_ALIGNED(src_width, 16)) { |
| InterpolateRow = InterpolateRow_16_SSE2; |
| } |
| } |
| #endif |
| #if defined(HAS_INTERPOLATEROW_16_SSSE3) |
| if (TestCpuFlag(kCpuHasSSSE3)) { |
| InterpolateRow = InterpolateRow_Any_16_SSSE3; |
| if (IS_ALIGNED(src_width, 16)) { |
| InterpolateRow = InterpolateRow_16_SSSE3; |
| } |
| } |
| #endif |
| #if defined(HAS_INTERPOLATEROW_16_AVX2) |
| if (TestCpuFlag(kCpuHasAVX2)) { |
| InterpolateRow = InterpolateRow_Any_16_AVX2; |
| if (IS_ALIGNED(src_width, 32)) { |
| InterpolateRow = InterpolateRow_16_AVX2; |
| } |
| } |
| #endif |
| #if defined(HAS_INTERPOLATEROW_16_NEON) |
| if (TestCpuFlag(kCpuHasNEON)) { |
| InterpolateRow = InterpolateRow_Any_16_NEON; |
| if (IS_ALIGNED(src_width, 16)) { |
| InterpolateRow = InterpolateRow_16_NEON; |
| } |
| } |
| #endif |
| #if defined(HAS_INTERPOLATEROW_16_MIPS_DSPR2) |
| if (TestCpuFlag(kCpuHasMIPS_DSPR2)) { |
| InterpolateRow = InterpolateRow_Any_16_MIPS_DSPR2; |
| if (IS_ALIGNED(src_width, 4)) { |
| InterpolateRow = InterpolateRow_16_MIPS_DSPR2; |
| } |
| } |
| #endif |
| |
| |
| #if defined(HAS_SCALEFILTERCOLS_16_SSSE3) |
| if (TestCpuFlag(kCpuHasSSSE3) && src_width < 32768) { |
| ScaleFilterCols = ScaleFilterCols_16_SSSE3; |
| } |
| #endif |
| if (y > max_y) { |
| y = max_y; |
| } |
| |
| for (j = 0; j < dst_height; ++j) { |
| int yi = y >> 16; |
| const uint16* src = src_ptr + yi * src_stride; |
| if (filtering == kFilterLinear) { |
| ScaleFilterCols(dst_ptr, src, dst_width, x, dx); |
| } else { |
| int yf = (y >> 8) & 255; |
| InterpolateRow((uint16*)row, src, src_stride, src_width, yf); |
| ScaleFilterCols(dst_ptr, (uint16*)row, dst_width, x, dx); |
| } |
| dst_ptr += dst_stride; |
| y += dy; |
| if (y > max_y) { |
| y = max_y; |
| } |
| } |
| free_aligned_buffer_64(row); |
| } |
| |
| // Scale up down with bilinear interpolation. |
| void ScalePlaneBilinearUp(int src_width, int src_height, |
| int dst_width, int dst_height, |
| int src_stride, int dst_stride, |
| const uint8* src_ptr, uint8* dst_ptr, |
| enum FilterMode filtering) { |
| int j; |
| // Initial source x/y coordinate and step values as 16.16 fixed point. |
| int x = 0; |
| int y = 0; |
| int dx = 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, |
| &x, &y, &dx, &dy); |
| src_width = Abs(src_width); |
| |
| #if defined(HAS_INTERPOLATEROW_SSE2) |
| if (TestCpuFlag(kCpuHasSSE2)) { |
| InterpolateRow = InterpolateRow_Any_SSE2; |
| if (IS_ALIGNED(dst_width, 16)) { |
| InterpolateRow = InterpolateRow_SSE2; |
| } |
| } |
| #endif |
| #if defined(HAS_INTERPOLATEROW_SSSE3) |
| if (TestCpuFlag(kCpuHasSSSE3)) { |
| InterpolateRow = InterpolateRow_Any_SSSE3; |
| if (IS_ALIGNED(dst_width, 16)) { |
| InterpolateRow = InterpolateRow_SSSE3; |
| } |
| } |
| #endif |
| #if defined(HAS_INTERPOLATEROW_AVX2) |
| if (TestCpuFlag(kCpuHasAVX2)) { |
| InterpolateRow = InterpolateRow_Any_AVX2; |
| if (IS_ALIGNED(dst_width, 32)) { |
| InterpolateRow = InterpolateRow_AVX2; |
| } |
| } |
| #endif |
| #if defined(HAS_INTERPOLATEROW_NEON) |
| if (TestCpuFlag(kCpuHasNEON)) { |
| InterpolateRow = InterpolateRow_Any_NEON; |
| if (IS_ALIGNED(dst_width, 16)) { |
| InterpolateRow = InterpolateRow_NEON; |
| } |
| } |
| #endif |
| #if defined(HAS_INTERPOLATEROW_MIPS_DSPR2) |
| if (TestCpuFlag(kCpuHasMIPS_DSPR2)) { |
| InterpolateRow = InterpolateRow_Any_MIPS_DSPR2; |
| if (IS_ALIGNED(dst_width, 4)) { |
| InterpolateRow = InterpolateRow_MIPS_DSPR2; |
| } |
| } |
| #endif |
| |
| if (filtering && src_width >= 32768) { |
| ScaleFilterCols = ScaleFilterCols64_C; |
| } |
| #if defined(HAS_SCALEFILTERCOLS_SSSE3) |
| if (filtering && TestCpuFlag(kCpuHasSSSE3) && src_width < 32768) { |
| ScaleFilterCols = ScaleFilterCols_SSSE3; |
| } |
| #endif |
| #if defined(HAS_SCALEFILTERCOLS_NEON) |
| if (filtering && TestCpuFlag(kCpuHasNEON) && src_width < 32768) { |
| ScaleFilterCols = ScaleFilterCols_Any_NEON; |
| if (IS_ALIGNED(dst_width, 8)) { |
| ScaleFilterCols = ScaleFilterCols_NEON; |
| } |
| } |
| #endif |
| if (!filtering && src_width * 2 == dst_width && x < 0x8000) { |
| ScaleFilterCols = ScaleColsUp2_C; |
| #if defined(HAS_SCALECOLS_SSE2) |
| if (TestCpuFlag(kCpuHasSSE2) && IS_ALIGNED(dst_width, 8)) { |
| ScaleFilterCols = ScaleColsUp2_SSE2; |
| } |
| #endif |
| } |
| |
| if (y > max_y) { |
| y = max_y; |
| } |
| { |
| int yi = y >> 16; |
| const uint8* src = src_ptr + yi * src_stride; |
| |
| // Allocate 2 row buffers. |
| const int kRowSize = (dst_width + 31) & ~31; |
| align_buffer_64(row, kRowSize * 2); |
| |
| uint8* rowptr = row; |
| int rowstride = kRowSize; |
| int lasty = yi; |
| |
| ScaleFilterCols(rowptr, src, dst_width, x, dx); |
| if (src_height > 1) { |
| src += src_stride; |
| } |
| ScaleFilterCols(rowptr + rowstride, src, dst_width, x, dx); |
| src += src_stride; |
| |
| for (j = 0; j < dst_height; ++j) { |
| 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) { |
| 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; |
| } |
| free_aligned_buffer_64(row); |
| } |
| } |
| |
| void ScalePlaneBilinearUp_16(int src_width, int src_height, |
| int dst_width, int dst_height, |
| int src_stride, int dst_stride, |
| const uint16* src_ptr, uint16* dst_ptr, |
| enum FilterMode filtering) { |
| int j; |
| // Initial source x/y coordinate and step values as 16.16 fixed point. |
| int x = 0; |
| int y = 0; |
| int dx = 0; |
| int dy = 0; |
| const int max_y = (src_height - 1) << 16; |
| void (*InterpolateRow)(uint16* dst_ptr, const uint16* src_ptr, |
| ptrdiff_t src_stride, int dst_width, int source_y_fraction) = |
| InterpolateRow_16_C; |
| void (*ScaleFilterCols)(uint16* dst_ptr, const uint16* src_ptr, |
| int dst_width, int x, int dx) = |
| filtering ? ScaleFilterCols_16_C : ScaleCols_16_C; |
| ScaleSlope(src_width, src_height, dst_width, dst_height, filtering, |
| &x, &y, &dx, &dy); |
| src_width = Abs(src_width); |
| |
| #if defined(HAS_INTERPOLATEROW_16_SSE2) |
| if (TestCpuFlag(kCpuHasSSE2)) { |
| InterpolateRow = InterpolateRow_Any_16_SSE2; |
| if (IS_ALIGNED(dst_width, 16)) { |
| InterpolateRow = InterpolateRow_16_SSE2; |
| } |
| } |
| #endif |
| #if defined(HAS_INTERPOLATEROW_16_SSSE3) |
| if (TestCpuFlag(kCpuHasSSSE3)) { |
| InterpolateRow = InterpolateRow_Any_16_SSSE3; |
| if (IS_ALIGNED(dst_width, 16)) { |
| InterpolateRow = InterpolateRow_16_SSSE3; |
| } |
| } |
| #endif |
| #if defined(HAS_INTERPOLATEROW_16_AVX2) |
| if (TestCpuFlag(kCpuHasAVX2)) { |
| InterpolateRow = InterpolateRow_Any_16_AVX2; |
| if (IS_ALIGNED(dst_width, 32)) { |
| InterpolateRow = InterpolateRow_16_AVX2; |
| } |
| } |
| #endif |
| #if defined(HAS_INTERPOLATEROW_16_NEON) |
| if (TestCpuFlag(kCpuHasNEON)) { |
| InterpolateRow = InterpolateRow_Any_16_NEON; |
| if (IS_ALIGNED(dst_width, 16)) { |
| InterpolateRow = InterpolateRow_16_NEON; |
| } |
| } |
| #endif |
| #if defined(HAS_INTERPOLATEROW_16_MIPS_DSPR2) |
| if (TestCpuFlag(kCpuHasMIPS_DSPR2)) { |
| InterpolateRow = InterpolateRow_Any_16_MIPS_DSPR2; |
| if (IS_ALIGNED(dst_width, 4)) { |
| InterpolateRow = InterpolateRow_16_MIPS_DSPR2; |
| } |
| } |
| #endif |
| |
| if (filtering && src_width >= 32768) { |
| ScaleFilterCols = ScaleFilterCols64_16_C; |
| } |
| #if defined(HAS_SCALEFILTERCOLS_16_SSSE3) |
| if (filtering && TestCpuFlag(kCpuHasSSSE3) && src_width < 32768) { |
| ScaleFilterCols = ScaleFilterCols_16_SSSE3; |
| } |
| #endif |
| if (!filtering && src_width * 2 == dst_width && x < 0x8000) { |
| ScaleFilterCols = ScaleColsUp2_16_C; |
| #if defined(HAS_SCALECOLS_16_SSE2) |
| if (TestCpuFlag(kCpuHasSSE2) && IS_ALIGNED(dst_width, 8)) { |
| ScaleFilterCols = ScaleColsUp2_16_SSE2; |
| } |
| #endif |
| } |
| |
| if (y > max_y) { |
| y = max_y; |
| } |
| { |
| int yi = y >> 16; |
| const uint16* src = src_ptr + yi * src_stride; |
| |
| // Allocate 2 row buffers. |
| const int kRowSize = (dst_width + 31) & ~31; |
| align_buffer_64(row, kRowSize * 4); |
| |
| uint16* rowptr = (uint16*)row; |
| int rowstride = kRowSize; |
| int lasty = yi; |
| |
| ScaleFilterCols(rowptr, src, dst_width, x, dx); |
| if (src_height > 1) { |
| src += src_stride; |
| } |
| ScaleFilterCols(rowptr + rowstride, src, dst_width, x, dx); |
| src += src_stride; |
| |
| for (j = 0; j < dst_height; ++j) { |
| 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) { |
| 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; |
| } |
| free_aligned_buffer_64(row); |
| } |
| } |
| |
| // Scale Plane to/from any dimensions, without interpolation. |
| // Fixed point math is used for performance: The upper 16 bits |
| // of x and dx is the integer part of the source position and |
| // the lower 16 bits are the fixed decimal part. |
| |
| static void ScalePlaneSimple(int src_width, int src_height, |
| int dst_width, int dst_height, |
| int src_stride, int dst_stride, |
| 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. |
| int x = 0; |
| int y = 0; |
| int dx = 0; |
| int dy = 0; |
| ScaleSlope(src_width, src_height, dst_width, dst_height, kFilterNone, |
| &x, &y, &dx, &dy); |
| src_width = Abs(src_width); |
| |
| if (src_width * 2 == dst_width && x < 0x8000) { |
| ScaleCols = ScaleColsUp2_C; |
| #if defined(HAS_SCALECOLS_SSE2) |
| if (TestCpuFlag(kCpuHasSSE2) && IS_ALIGNED(dst_width, 8)) { |
| ScaleCols = ScaleColsUp2_SSE2; |
| } |
| #endif |
| } |
| |
| for (i = 0; i < dst_height; ++i) { |
| ScaleCols(dst_ptr, src_ptr + (y >> 16) * src_stride, dst_width, x, dx); |
| dst_ptr += dst_stride; |
| y += dy; |
| } |
| } |
| |
| static void ScalePlaneSimple_16(int src_width, int src_height, |
| int dst_width, int dst_height, |
| int src_stride, int dst_stride, |
| const uint16* src_ptr, uint16* dst_ptr) { |
| int i; |
| void (*ScaleCols)(uint16* dst_ptr, const uint16* src_ptr, |
| int dst_width, int x, int dx) = ScaleCols_16_C; |
| // Initial source x/y coordinate and step values as 16.16 fixed point. |
| int x = 0; |
| int y = 0; |
| int dx = 0; |
| int dy = 0; |
| ScaleSlope(src_width, src_height, dst_width, dst_height, kFilterNone, |
| &x, &y, &dx, &dy); |
| src_width = Abs(src_width); |
| |
| if (src_width * 2 == dst_width && x < 0x8000) { |
| ScaleCols = ScaleColsUp2_16_C; |
| #if defined(HAS_SCALECOLS_16_SSE2) |
| if (TestCpuFlag(kCpuHasSSE2) && IS_ALIGNED(dst_width, 8)) { |
| ScaleCols = ScaleColsUp2_16_SSE2; |
| } |
| #endif |
| } |
| |
| for (i = 0; i < dst_height; ++i) { |
| ScaleCols(dst_ptr, src_ptr + (y >> 16) * src_stride, |
| dst_width, x, dx); |
| dst_ptr += dst_stride; |
| y += dy; |
| } |
| } |
| |
| // Scale a plane. |
| // This function dispatches to a specialized scaler based on scale factor. |
| |
| LIBYUV_API |
| void ScalePlane(const uint8* src, int src_stride, |
| int src_width, int src_height, |
| uint8* dst, int dst_stride, |
| int dst_width, int dst_height, |
| enum FilterMode filtering) { |
| // Simplify filtering when possible. |
| filtering = ScaleFilterReduce(src_width, src_height, |
| dst_width, dst_height, filtering); |
| |
| // Negative height means invert the image. |
| if (src_height < 0) { |
| src_height = -src_height; |
| src = src + (src_height - 1) * src_stride; |
| src_stride = -src_stride; |
| } |
| |
| // Use specialized scales to improve performance for common resolutions. |
| // For example, all the 1/2 scalings will use ScalePlaneDown2() |
| if (dst_width == src_width && dst_height == src_height) { |
| // Straight copy. |
| CopyPlane(src, src_stride, dst, dst_stride, dst_width, dst_height); |
| return; |
| } |
| if (dst_width == src_width && filtering != kFilterBox) { |
| int dy = FixedDiv(src_height, dst_height); |
| // Arbitrary scale vertically, but unscaled horizontally. |
| ScalePlaneVertical(src_height, |
| dst_width, dst_height, |
| src_stride, dst_stride, src, dst, |
| 0, 0, dy, 1, filtering); |
| return; |
| } |
| if (dst_width <= Abs(src_width) && dst_height <= src_height) { |
| // Scale down. |
| if (4 * dst_width == 3 * src_width && |
| 4 * dst_height == 3 * src_height) { |
| // optimized, 3/4 |
| ScalePlaneDown34(src_width, src_height, dst_width, dst_height, |
| src_stride, dst_stride, src, dst, filtering); |
| return; |
| } |
| if (2 * dst_width == src_width && 2 * dst_height == src_height) { |
| // optimized, 1/2 |
| ScalePlaneDown2(src_width, src_height, dst_width, dst_height, |
| src_stride, dst_stride, src, dst, filtering); |
| return; |
| } |
| // 3/8 rounded up for odd sized chroma height. |
| if (8 * dst_width == 3 * src_width && |
| dst_height == ((src_height * 3 + 7) / 8)) { |
| // optimized, 3/8 |
| ScalePlaneDown38(src_width, src_height, dst_width, dst_height, |
| src_stride, dst_stride, src, dst, filtering); |
| return; |
| } |
| if (4 * dst_width == src_width && 4 * dst_height == src_height && |
| (filtering == kFilterBox || filtering == kFilterNone)) { |
| // optimized, 1/4 |
| ScalePlaneDown4(src_width, src_height, dst_width, dst_height, |
| src_stride, dst_stride, src, dst, filtering); |
| return; |
| } |
| } |
| if (filtering == kFilterBox && dst_height * 2 < src_height) { |
| ScalePlaneBox(src_width, src_height, dst_width, dst_height, |
| src_stride, dst_stride, src, dst); |
| return; |
| } |
| if (filtering && dst_height > src_height) { |
| ScalePlaneBilinearUp(src_width, src_height, dst_width, dst_height, |
| src_stride, dst_stride, src, dst, filtering); |
| return; |
| } |
| if (filtering) { |
| ScalePlaneBilinearDown(src_width, src_height, dst_width, dst_height, |
| src_stride, dst_stride, src, dst, filtering); |
| return; |
| } |
| ScalePlaneSimple(src_width, src_height, dst_width, dst_height, |
| src_stride, dst_stride, src, dst); |
| } |
| |
| LIBYUV_API |
| void ScalePlane_16(const uint16* src, int src_stride, |
| int src_width, int src_height, |
| uint16* dst, int dst_stride, |
| int dst_width, int dst_height, |
| enum FilterMode filtering) { |
| // Simplify filtering when possible. |
| filtering = ScaleFilterReduce(src_width, src_height, |
| dst_width, dst_height, filtering); |
| |
| // Negative height means invert the image. |
| if (src_height < 0) { |
| src_height = -src_height; |
| src = src + (src_height - 1) * src_stride; |
| src_stride = -src_stride; |
| } |
| |
| // Use specialized scales to improve performance for common resolutions. |
| // For example, all the 1/2 scalings will use ScalePlaneDown2() |
| if (dst_width == src_width && dst_height == src_height) { |
| // Straight copy. |
| CopyPlane_16(src, src_stride, dst, dst_stride, dst_width, dst_height); |
| return; |
| } |
| if (dst_width == src_width) { |
| int dy = FixedDiv(src_height, dst_height); |
| // Arbitrary scale vertically, but unscaled vertically. |
| ScalePlaneVertical_16(src_height, |
| dst_width, dst_height, |
| src_stride, dst_stride, src, dst, |
| 0, 0, dy, 1, filtering); |
| return; |
| } |
| if (dst_width <= Abs(src_width) && dst_height <= src_height) { |
| // Scale down. |
| if (4 * dst_width == 3 * src_width && |
| 4 * dst_height == 3 * src_height) { |
| // optimized, 3/4 |
| ScalePlaneDown34_16(src_width, src_height, dst_width, dst_height, |
| src_stride, dst_stride, src, dst, filtering); |
| return; |
| } |
| if (2 * dst_width == src_width && 2 * dst_height == src_height) { |
| // optimized, 1/2 |
| ScalePlaneDown2_16(src_width, src_height, dst_width, dst_height, |
| src_stride, dst_stride, src, dst, filtering); |
| return; |
| } |
| // 3/8 rounded up for odd sized chroma height. |
| if (8 * dst_width == 3 * src_width && |
| dst_height == ((src_height * 3 + 7) / 8)) { |
| // optimized, 3/8 |
| ScalePlaneDown38_16(src_width, src_height, dst_width, dst_height, |
| src_stride, dst_stride, src, dst, filtering); |
| return; |
| } |
| if (4 * dst_width == src_width && 4 * dst_height == src_height && |
| filtering != kFilterBilinear) { |
| // optimized, 1/4 |
| ScalePlaneDown4_16(src_width, src_height, dst_width, dst_height, |
| src_stride, dst_stride, src, dst, filtering); |
| return; |
| } |
| } |
| if (filtering == kFilterBox && dst_height * 2 < src_height) { |
| ScalePlaneBox_16(src_width, src_height, dst_width, dst_height, |
| src_stride, dst_stride, src, dst); |
| return; |
| } |
| if (filtering && dst_height > src_height) { |
| ScalePlaneBilinearUp_16(src_width, src_height, dst_width, dst_height, |
| src_stride, dst_stride, src, dst, filtering); |
| return; |
| } |
| if (filtering) { |
| ScalePlaneBilinearDown_16(src_width, src_height, dst_width, dst_height, |
| src_stride, dst_stride, src, dst, filtering); |
| return; |
| } |
| ScalePlaneSimple_16(src_width, src_height, dst_width, dst_height, |
| src_stride, dst_stride, src, dst); |
| } |
| |
| // Scale an I420 image. |
| // This function in turn calls a scaling function for each plane. |
| |
| LIBYUV_API |
| int I420Scale(const uint8* src_y, int src_stride_y, |
| const uint8* src_u, int src_stride_u, |
| const uint8* src_v, int src_stride_v, |
| int src_width, int src_height, |
| uint8* dst_y, int dst_stride_y, |
| uint8* dst_u, int dst_stride_u, |
| uint8* dst_v, int dst_stride_v, |
| int dst_width, int dst_height, |
| enum FilterMode filtering) { |
| int src_halfwidth = SUBSAMPLE(src_width, 1, 1); |
| int src_halfheight = SUBSAMPLE(src_height, 1, 1); |
| int dst_halfwidth = SUBSAMPLE(dst_width, 1, 1); |
| int dst_halfheight = SUBSAMPLE(dst_height, 1, 1); |
| if (!src_y || !src_u || !src_v || src_width == 0 || src_height == 0 || |
| src_width > 32768 || src_height > 32768 || |
| !dst_y || !dst_u || !dst_v || dst_width <= 0 || dst_height <= 0) { |
| return -1; |
| } |
| |
| ScalePlane(src_y, src_stride_y, src_width, src_height, |
| dst_y, dst_stride_y, dst_width, dst_height, |
| filtering); |
| ScalePlane(src_u, src_stride_u, src_halfwidth, src_halfheight, |
| dst_u, dst_stride_u, dst_halfwidth, dst_halfheight, |
| filtering); |
| ScalePlane(src_v, src_stride_v, src_halfwidth, src_halfheight, |
| dst_v, dst_stride_v, dst_halfwidth, dst_halfheight, |
| filtering); |
| return 0; |
| } |
| |
| LIBYUV_API |
| int I420Scale_16(const uint16* src_y, int src_stride_y, |
| const uint16* src_u, int src_stride_u, |
| const uint16* src_v, int src_stride_v, |
| int src_width, int src_height, |
| uint16* dst_y, int dst_stride_y, |
| uint16* dst_u, int dst_stride_u, |
| uint16* dst_v, int dst_stride_v, |
| int dst_width, int dst_height, |
| enum FilterMode filtering) { |
| int src_halfwidth = SUBSAMPLE(src_width, 1, 1); |
| int src_halfheight = SUBSAMPLE(src_height, 1, 1); |
| int dst_halfwidth = SUBSAMPLE(dst_width, 1, 1); |
| int dst_halfheight = SUBSAMPLE(dst_height, 1, 1); |
| if (!src_y || !src_u || !src_v || src_width == 0 || src_height == 0 || |
| src_width > 32768 || src_height > 32768 || |
| !dst_y || !dst_u || !dst_v || dst_width <= 0 || dst_height <= 0) { |
| return -1; |
| } |
| |
| ScalePlane_16(src_y, src_stride_y, src_width, src_height, |
| dst_y, dst_stride_y, dst_width, dst_height, |
| filtering); |
| ScalePlane_16(src_u, src_stride_u, src_halfwidth, src_halfheight, |
| dst_u, dst_stride_u, dst_halfwidth, dst_halfheight, |
| filtering); |
| ScalePlane_16(src_v, src_stride_v, src_halfwidth, src_halfheight, |
| dst_v, dst_stride_v, dst_halfwidth, dst_halfheight, |
| filtering); |
| return 0; |
| } |
| |
| // Deprecated api |
| LIBYUV_API |
| int Scale(const uint8* src_y, const uint8* src_u, const uint8* src_v, |
| int src_stride_y, int src_stride_u, int src_stride_v, |
| int src_width, int src_height, |
| uint8* dst_y, uint8* dst_u, uint8* dst_v, |
| int dst_stride_y, int dst_stride_u, int dst_stride_v, |
| int dst_width, int dst_height, |
| LIBYUV_BOOL interpolate) { |
| return I420Scale(src_y, src_stride_y, |
| src_u, src_stride_u, |
| src_v, src_stride_v, |
| src_width, src_height, |
| dst_y, dst_stride_y, |
| dst_u, dst_stride_u, |
| dst_v, dst_stride_v, |
| dst_width, dst_height, |
| interpolate ? kFilterBox : kFilterNone); |
| } |
| |
| // Deprecated api |
| LIBYUV_API |
| int ScaleOffset(const uint8* src, int src_width, int src_height, |
| uint8* dst, int dst_width, int dst_height, int dst_yoffset, |
| LIBYUV_BOOL interpolate) { |
| // Chroma requires offset to multiple of 2. |
| int dst_yoffset_even = dst_yoffset & ~1; |
| int src_halfwidth = SUBSAMPLE(src_width, 1, 1); |
| int src_halfheight = SUBSAMPLE(src_height, 1, 1); |
| int dst_halfwidth = SUBSAMPLE(dst_width, 1, 1); |
| int dst_halfheight = SUBSAMPLE(dst_height, 1, 1); |
| int aheight = dst_height - dst_yoffset_even * 2; // actual output height |
| const uint8* src_y = src; |
| const uint8* src_u = src + src_width * src_height; |
| const uint8* src_v = src + src_width * src_height + |
| src_halfwidth * src_halfheight; |
| uint8* dst_y = dst + dst_yoffset_even * dst_width; |
| uint8* dst_u = dst + dst_width * dst_height + |
| (dst_yoffset_even >> 1) * dst_halfwidth; |
| uint8* dst_v = dst + dst_width * dst_height + dst_halfwidth * dst_halfheight + |
| (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, |
| src_u, src_halfwidth, |
| src_v, src_halfwidth, |
| src_width, src_height, |
| dst_y, dst_width, |
| dst_u, dst_halfwidth, |
| dst_v, dst_halfwidth, |
| dst_width, aheight, |
| interpolate ? kFilterBox : kFilterNone); |
| } |
| |
| #ifdef __cplusplus |
| } // extern "C" |
| } // namespace libyuv |
| #endif |
