| /* |
| * Copyright 2020 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 CopyUV |
| #include "libyuv/row.h" |
| #include "libyuv/scale_row.h" |
| |
| #ifdef __cplusplus |
| namespace libyuv { |
| extern "C" { |
| #endif |
| |
| // Macros to enable specialized scalers |
| |
| #ifndef HAS_SCALEUVDOWN2 |
| #define HAS_SCALEUVDOWN2 1 |
| #endif |
| #ifndef HAS_SCALEUVDOWN4BOX |
| #define HAS_SCALEUVDOWN4BOX 1 |
| #endif |
| #ifndef HAS_SCALEUVDOWNEVEN |
| #define HAS_SCALEUVDOWNEVEN 1 |
| #endif |
| #ifndef HAS_SCALEUVBILINEARDOWN |
| #define HAS_SCALEUVBILINEARDOWN 1 |
| #endif |
| #ifndef HAS_SCALEUVBILINEARUP |
| #define HAS_SCALEUVBILINEARUP 1 |
| #endif |
| #ifndef HAS_UVCOPY |
| #define HAS_UVCOPY 1 |
| #endif |
| #ifndef HAS_SCALEPLANEVERTICAL |
| #define HAS_SCALEPLANEVERTICAL 1 |
| #endif |
| |
| static __inline int Abs(int v) { |
| return v >= 0 ? v : -v; |
| } |
| |
| // ScaleUV, 1/2 |
| // This is an optimized version for scaling down a UV to 1/2 of |
| // its original size. |
| #if HAS_SCALEUVDOWN2 |
| static void ScaleUVDown2(int src_width, |
| int src_height, |
| int dst_width, |
| int dst_height, |
| int src_stride, |
| int dst_stride, |
| const uint8_t* src_uv, |
| uint8_t* dst_uv, |
| int x, |
| int dx, |
| int y, |
| int dy, |
| enum FilterMode filtering) { |
| int j; |
| int row_stride = src_stride * (dy >> 16); |
| void (*ScaleUVRowDown2)(const uint8_t* src_uv, ptrdiff_t src_stride, |
| uint8_t* dst_uv, int dst_width) = |
| filtering == kFilterNone |
| ? ScaleUVRowDown2_C |
| : (filtering == kFilterLinear ? ScaleUVRowDown2Linear_C |
| : ScaleUVRowDown2Box_C); |
| (void)src_width; |
| (void)src_height; |
| (void)dx; |
| assert(dx == 65536 * 2); // Test scale factor of 2. |
| assert((dy & 0x1ffff) == 0); // Test vertical scale is multiple of 2. |
| // Advance to odd row, even column. |
| if (filtering == kFilterBilinear) { |
| src_uv += (y >> 16) * src_stride + (x >> 16) * 2; |
| } else { |
| src_uv += (y >> 16) * src_stride + ((x >> 16) - 1) * 2; |
| } |
| |
| #if defined(HAS_SCALEUVROWDOWN2BOX_SSSE3) |
| if (TestCpuFlag(kCpuHasSSSE3) && filtering) { |
| ScaleUVRowDown2 = ScaleUVRowDown2Box_Any_SSSE3; |
| if (IS_ALIGNED(dst_width, 4)) { |
| ScaleUVRowDown2 = ScaleUVRowDown2Box_SSSE3; |
| } |
| } |
| #endif |
| #if defined(HAS_SCALEUVROWDOWN2BOX_AVX2) |
| if (TestCpuFlag(kCpuHasAVX2) && filtering) { |
| ScaleUVRowDown2 = ScaleUVRowDown2Box_Any_AVX2; |
| if (IS_ALIGNED(dst_width, 8)) { |
| ScaleUVRowDown2 = ScaleUVRowDown2Box_AVX2; |
| } |
| } |
| #endif |
| #if defined(HAS_SCALEUVROWDOWN2BOX_NEON) |
| if (TestCpuFlag(kCpuHasNEON) && filtering) { |
| ScaleUVRowDown2 = ScaleUVRowDown2Box_Any_NEON; |
| if (IS_ALIGNED(dst_width, 8)) { |
| ScaleUVRowDown2 = ScaleUVRowDown2Box_NEON; |
| } |
| } |
| #endif |
| |
| // This code is not enabled. Only box filter is available at this time. |
| #if defined(HAS_SCALEUVROWDOWN2_SSSE3) |
| if (TestCpuFlag(kCpuHasSSSE3)) { |
| ScaleUVRowDown2 = |
| filtering == kFilterNone |
| ? ScaleUVRowDown2_Any_SSSE3 |
| : (filtering == kFilterLinear ? ScaleUVRowDown2Linear_Any_SSSE3 |
| : ScaleUVRowDown2Box_Any_SSSE3); |
| if (IS_ALIGNED(dst_width, 2)) { |
| ScaleUVRowDown2 = |
| filtering == kFilterNone |
| ? ScaleUVRowDown2_SSSE3 |
| : (filtering == kFilterLinear ? ScaleUVRowDown2Linear_SSSE3 |
| : ScaleUVRowDown2Box_SSSE3); |
| } |
| } |
| #endif |
| // This code is not enabled. Only box filter is available at this time. |
| #if defined(HAS_SCALEUVROWDOWN2_NEON) |
| if (TestCpuFlag(kCpuHasNEON)) { |
| ScaleUVRowDown2 = |
| filtering == kFilterNone |
| ? ScaleUVRowDown2_Any_NEON |
| : (filtering == kFilterLinear ? ScaleUVRowDown2Linear_Any_NEON |
| : ScaleUVRowDown2Box_Any_NEON); |
| if (IS_ALIGNED(dst_width, 8)) { |
| ScaleUVRowDown2 = |
| filtering == kFilterNone |
| ? ScaleUVRowDown2_NEON |
| : (filtering == kFilterLinear ? ScaleUVRowDown2Linear_NEON |
| : ScaleUVRowDown2Box_NEON); |
| } |
| } |
| #endif |
| #if defined(HAS_SCALEUVROWDOWN2_MMI) |
| if (TestCpuFlag(kCpuHasMMI)) { |
| ScaleUVRowDown2 = |
| filtering == kFilterNone |
| ? ScaleUVRowDown2_Any_MMI |
| : (filtering == kFilterLinear ? ScaleUVRowDown2Linear_Any_MMI |
| : ScaleUVRowDown2Box_Any_MMI); |
| if (IS_ALIGNED(dst_width, 2)) { |
| ScaleUVRowDown2 = |
| filtering == kFilterNone |
| ? ScaleUVRowDown2_MMI |
| : (filtering == kFilterLinear ? ScaleUVRowDown2Linear_MMI |
| : ScaleUVRowDown2Box_MMI); |
| } |
| } |
| #endif |
| #if defined(HAS_SCALEUVROWDOWN2_MSA) |
| if (TestCpuFlag(kCpuHasMSA)) { |
| ScaleUVRowDown2 = |
| filtering == kFilterNone |
| ? ScaleUVRowDown2_Any_MSA |
| : (filtering == kFilterLinear ? ScaleUVRowDown2Linear_Any_MSA |
| : ScaleUVRowDown2Box_Any_MSA); |
| if (IS_ALIGNED(dst_width, 2)) { |
| ScaleUVRowDown2 = |
| filtering == kFilterNone |
| ? ScaleUVRowDown2_MSA |
| : (filtering == kFilterLinear ? ScaleUVRowDown2Linear_MSA |
| : ScaleUVRowDown2Box_MSA); |
| } |
| } |
| #endif |
| |
| if (filtering == kFilterLinear) { |
| src_stride = 0; |
| } |
| for (j = 0; j < dst_height; ++j) { |
| ScaleUVRowDown2(src_uv, src_stride, dst_uv, dst_width); |
| src_uv += row_stride; |
| dst_uv += dst_stride; |
| } |
| } |
| #endif // HAS_SCALEUVDOWN2 |
| |
| // ScaleUV, 1/4 |
| // This is an optimized version for scaling down a UV to 1/4 of |
| // its original size. |
| #if HAS_SCALEUVDOWN4BOX |
| static void ScaleUVDown4Box(int src_width, |
| int src_height, |
| int dst_width, |
| int dst_height, |
| int src_stride, |
| int dst_stride, |
| const uint8_t* src_uv, |
| uint8_t* dst_uv, |
| int x, |
| int dx, |
| int y, |
| int dy) { |
| int j; |
| // Allocate 2 rows of UV. |
| const int kRowSize = (dst_width * 2 * 2 + 15) & ~15; |
| align_buffer_64(row, kRowSize * 2); |
| int row_stride = src_stride * (dy >> 16); |
| void (*ScaleUVRowDown2)(const uint8_t* src_uv, ptrdiff_t src_stride, |
| uint8_t* dst_uv, int dst_width) = |
| ScaleUVRowDown2Box_C; |
| // Advance to odd row, even column. |
| src_uv += (y >> 16) * src_stride + (x >> 16) * 2; |
| (void)src_width; |
| (void)src_height; |
| (void)dx; |
| assert(dx == 65536 * 4); // Test scale factor of 4. |
| assert((dy & 0x3ffff) == 0); // Test vertical scale is multiple of 4. |
| |
| #if defined(HAS_SCALEUVROWDOWN2BOX_SSSE3) |
| if (TestCpuFlag(kCpuHasSSSE3)) { |
| ScaleUVRowDown2 = ScaleUVRowDown2Box_Any_SSSE3; |
| if (IS_ALIGNED(dst_width, 4)) { |
| ScaleUVRowDown2 = ScaleUVRowDown2Box_SSSE3; |
| } |
| } |
| #endif |
| #if defined(HAS_SCALEUVROWDOWN2BOX_AVX2) |
| if (TestCpuFlag(kCpuHasAVX2)) { |
| ScaleUVRowDown2 = ScaleUVRowDown2Box_Any_AVX2; |
| if (IS_ALIGNED(dst_width, 8)) { |
| ScaleUVRowDown2 = ScaleUVRowDown2Box_AVX2; |
| } |
| } |
| #endif |
| #if defined(HAS_SCALEUVROWDOWN2BOX_NEON) |
| if (TestCpuFlag(kCpuHasNEON)) { |
| ScaleUVRowDown2 = ScaleUVRowDown2Box_Any_NEON; |
| if (IS_ALIGNED(dst_width, 8)) { |
| ScaleUVRowDown2 = ScaleUVRowDown2Box_NEON; |
| } |
| } |
| #endif |
| |
| for (j = 0; j < dst_height; ++j) { |
| ScaleUVRowDown2(src_uv, src_stride, row, dst_width * 2); |
| ScaleUVRowDown2(src_uv + src_stride * 2, src_stride, row + kRowSize, |
| dst_width * 2); |
| ScaleUVRowDown2(row, kRowSize, dst_uv, dst_width); |
| src_uv += row_stride; |
| dst_uv += dst_stride; |
| } |
| free_aligned_buffer_64(row); |
| } |
| #endif // HAS_SCALEUVDOWN4BOX |
| |
| // ScaleUV Even |
| // This is an optimized version for scaling down a UV to even |
| // multiple of its original size. |
| #if HAS_SCALEUVDOWNEVEN |
| static void ScaleUVDownEven(int src_width, |
| int src_height, |
| int dst_width, |
| int dst_height, |
| int src_stride, |
| int dst_stride, |
| const uint8_t* src_uv, |
| uint8_t* dst_uv, |
| int x, |
| int dx, |
| int y, |
| int dy, |
| enum FilterMode filtering) { |
| int j; |
| int col_step = dx >> 16; |
| int row_stride = (dy >> 16) * src_stride; |
| void (*ScaleUVRowDownEven)(const uint8_t* src_uv, ptrdiff_t src_stride, |
| int src_step, uint8_t* dst_uv, int dst_width) = |
| filtering ? ScaleUVRowDownEvenBox_C : ScaleUVRowDownEven_C; |
| (void)src_width; |
| (void)src_height; |
| assert(IS_ALIGNED(src_width, 2)); |
| assert(IS_ALIGNED(src_height, 2)); |
| src_uv += (y >> 16) * src_stride + (x >> 16) * 2; |
| #if defined(HAS_SCALEUVROWDOWNEVEN_SSSE3) |
| if (TestCpuFlag(kCpuHasSSSE3)) { |
| ScaleUVRowDownEven = filtering ? ScaleUVRowDownEvenBox_Any_SSSE3 |
| : ScaleUVRowDownEven_Any_SSSE3; |
| if (IS_ALIGNED(dst_width, 4)) { |
| ScaleUVRowDownEven = |
| filtering ? ScaleUVRowDownEvenBox_SSE2 : ScaleUVRowDownEven_SSSE3; |
| } |
| } |
| #endif |
| #if defined(HAS_SCALEUVROWDOWNEVEN_NEON) |
| if (TestCpuFlag(kCpuHasNEON) && !filtering) { |
| ScaleUVRowDownEven = ScaleUVRowDownEven_Any_NEON; |
| if (IS_ALIGNED(dst_width, 4)) { |
| ScaleUVRowDownEven = ScaleUVRowDownEven_NEON; |
| } |
| } |
| #endif// TODO(fbarchard): Enable Box filter |
| #if defined(HAS_SCALEUVROWDOWNEVENBOX_NEON) |
| if (TestCpuFlag(kCpuHasNEON)) { |
| ScaleUVRowDownEven = filtering ? ScaleUVRowDownEvenBox_Any_NEON |
| : ScaleUVRowDownEven_Any_NEON; |
| if (IS_ALIGNED(dst_width, 4)) { |
| ScaleUVRowDownEven = |
| filtering ? ScaleUVRowDownEvenBox_NEON : ScaleUVRowDownEven_NEON; |
| } |
| } |
| #endif |
| #if defined(HAS_SCALEUVROWDOWNEVEN_MMI) |
| if (TestCpuFlag(kCpuHasMMI)) { |
| ScaleUVRowDownEven = |
| filtering ? ScaleUVRowDownEvenBox_Any_MMI : ScaleUVRowDownEven_Any_MMI; |
| if (IS_ALIGNED(dst_width, 2)) { |
| ScaleUVRowDownEven = |
| filtering ? ScaleUVRowDownEvenBox_MMI : ScaleUVRowDownEven_MMI; |
| } |
| } |
| #endif |
| #if defined(HAS_SCALEUVROWDOWNEVEN_MSA) |
| if (TestCpuFlag(kCpuHasMSA)) { |
| ScaleUVRowDownEven = |
| filtering ? ScaleUVRowDownEvenBox_Any_MSA : ScaleUVRowDownEven_Any_MSA; |
| if (IS_ALIGNED(dst_width, 4)) { |
| ScaleUVRowDownEven = |
| filtering ? ScaleUVRowDownEvenBox_MSA : ScaleUVRowDownEven_MSA; |
| } |
| } |
| #endif |
| |
| if (filtering == kFilterLinear) { |
| src_stride = 0; |
| } |
| for (j = 0; j < dst_height; ++j) { |
| ScaleUVRowDownEven(src_uv, src_stride, col_step, dst_uv, dst_width); |
| src_uv += row_stride; |
| dst_uv += dst_stride; |
| } |
| } |
| #endif |
| |
| // Scale UV down with bilinear interpolation. |
| #if HAS_SCALEUVBILINEARDOWN |
| static void ScaleUVBilinearDown(int src_width, |
| int src_height, |
| int dst_width, |
| int dst_height, |
| int src_stride, |
| int dst_stride, |
| const uint8_t* src_uv, |
| uint8_t* dst_uv, |
| int x, |
| int dx, |
| int y, |
| int dy, |
| enum FilterMode filtering) { |
| int j; |
| void (*InterpolateRow)(uint8_t * dst_uv, const uint8_t* src_uv, |
| ptrdiff_t src_stride, int dst_width, |
| int source_y_fraction) = InterpolateRow_C; |
| void (*ScaleUVFilterCols)(uint8_t * dst_uv, const uint8_t* src_uv, |
| int dst_width, int x, int dx) = |
| (src_width >= 32768) ? ScaleUVFilterCols64_C : ScaleUVFilterCols_C; |
| int64_t xlast = x + (int64_t)(dst_width - 1) * dx; |
| int64_t xl = (dx >= 0) ? x : xlast; |
| int64_t xr = (dx >= 0) ? xlast : x; |
| int clip_src_width; |
| xl = (xl >> 16) & ~3; // Left edge aligned. |
| xr = (xr >> 16) + 1; // Right most pixel used. Bilinear uses 2 pixels. |
| xr = (xr + 1 + 3) & ~3; // 1 beyond 4 pixel aligned right most pixel. |
| if (xr > src_width) { |
| xr = src_width; |
| } |
| clip_src_width = (int)(xr - xl) * 2; // Width aligned to 2. |
| src_uv += xl * 2; |
| x -= (int)(xl << 16); |
| #if defined(HAS_INTERPOLATEROW_SSSE3) |
| if (TestCpuFlag(kCpuHasSSSE3)) { |
| InterpolateRow = InterpolateRow_Any_SSSE3; |
| if (IS_ALIGNED(clip_src_width, 16)) { |
| InterpolateRow = InterpolateRow_SSSE3; |
| } |
| } |
| #endif |
| #if defined(HAS_INTERPOLATEROW_AVX2) |
| if (TestCpuFlag(kCpuHasAVX2)) { |
| InterpolateRow = InterpolateRow_Any_AVX2; |
| if (IS_ALIGNED(clip_src_width, 32)) { |
| InterpolateRow = InterpolateRow_AVX2; |
| } |
| } |
| #endif |
| #if defined(HAS_INTERPOLATEROW_NEON) |
| if (TestCpuFlag(kCpuHasNEON)) { |
| InterpolateRow = InterpolateRow_Any_NEON; |
| if (IS_ALIGNED(clip_src_width, 16)) { |
| InterpolateRow = InterpolateRow_NEON; |
| } |
| } |
| #endif |
| #if defined(HAS_INTERPOLATEROW_MSA) |
| if (TestCpuFlag(kCpuHasMSA)) { |
| InterpolateRow = InterpolateRow_Any_MSA; |
| if (IS_ALIGNED(clip_src_width, 32)) { |
| InterpolateRow = InterpolateRow_MSA; |
| } |
| } |
| #endif |
| #if defined(HAS_SCALEUVFILTERCOLS_SSSE3) |
| if (TestCpuFlag(kCpuHasSSSE3) && src_width < 32768) { |
| ScaleUVFilterCols = ScaleUVFilterCols_SSSE3; |
| } |
| #endif |
| #if defined(HAS_SCALEUVFILTERCOLS_NEON) |
| if (TestCpuFlag(kCpuHasNEON)) { |
| ScaleUVFilterCols = ScaleUVFilterCols_Any_NEON; |
| if (IS_ALIGNED(dst_width, 4)) { |
| ScaleUVFilterCols = ScaleUVFilterCols_NEON; |
| } |
| } |
| #endif |
| #if defined(HAS_SCALEUVFILTERCOLS_MSA) |
| if (TestCpuFlag(kCpuHasMSA)) { |
| ScaleUVFilterCols = ScaleUVFilterCols_Any_MSA; |
| if (IS_ALIGNED(dst_width, 8)) { |
| ScaleUVFilterCols = ScaleUVFilterCols_MSA; |
| } |
| } |
| #endif |
| // TODO(fbarchard): Consider not allocating row buffer for kFilterLinear. |
| // Allocate a row of UV. |
| { |
| align_buffer_64(row, clip_src_width * 2); |
| |
| const int max_y = (src_height - 1) << 16; |
| if (y > max_y) { |
| y = max_y; |
| } |
| for (j = 0; j < dst_height; ++j) { |
| int yi = y >> 16; |
| const uint8_t* src = src_uv + yi * src_stride; |
| if (filtering == kFilterLinear) { |
| ScaleUVFilterCols(dst_uv, src, dst_width, x, dx); |
| } else { |
| int yf = (y >> 8) & 255; |
| InterpolateRow(row, src, src_stride, clip_src_width, yf); |
| ScaleUVFilterCols(dst_uv, row, dst_width, x, dx); |
| } |
| dst_uv += dst_stride; |
| y += dy; |
| if (y > max_y) { |
| y = max_y; |
| } |
| } |
| free_aligned_buffer_64(row); |
| } |
| } |
| #endif |
| |
| // Scale UV up with bilinear interpolation. |
| #if HAS_SCALEUVBILINEARUP |
| static void ScaleUVBilinearUp(int src_width, |
| int src_height, |
| int dst_width, |
| int dst_height, |
| int src_stride, |
| int dst_stride, |
| const uint8_t* src_uv, |
| uint8_t* dst_uv, |
| int x, |
| int dx, |
| int y, |
| int dy, |
| enum FilterMode filtering) { |
| int j; |
| void (*InterpolateRow)(uint8_t * dst_uv, const uint8_t* src_uv, |
| ptrdiff_t src_stride, int dst_width, |
| int source_y_fraction) = InterpolateRow_C; |
| void (*ScaleUVFilterCols)(uint8_t * dst_uv, const uint8_t* src_uv, |
| int dst_width, int x, int dx) = |
| filtering ? ScaleUVFilterCols_C : ScaleUVCols_C; |
| const int max_y = (src_height - 1) << 16; |
| #if defined(HAS_INTERPOLATEROW_SSSE3) |
| if (TestCpuFlag(kCpuHasSSSE3)) { |
| InterpolateRow = InterpolateRow_Any_SSSE3; |
| if (IS_ALIGNED(dst_width, 4)) { |
| InterpolateRow = InterpolateRow_SSSE3; |
| } |
| } |
| #endif |
| #if defined(HAS_INTERPOLATEROW_AVX2) |
| if (TestCpuFlag(kCpuHasAVX2)) { |
| InterpolateRow = InterpolateRow_Any_AVX2; |
| if (IS_ALIGNED(dst_width, 8)) { |
| InterpolateRow = InterpolateRow_AVX2; |
| } |
| } |
| #endif |
| #if defined(HAS_INTERPOLATEROW_NEON) |
| if (TestCpuFlag(kCpuHasNEON)) { |
| InterpolateRow = InterpolateRow_Any_NEON; |
| if (IS_ALIGNED(dst_width, 4)) { |
| InterpolateRow = InterpolateRow_NEON; |
| } |
| } |
| #endif |
| #if defined(HAS_INTERPOLATEROW_MMI) |
| if (TestCpuFlag(kCpuHasMMI)) { |
| InterpolateRow = InterpolateRow_Any_MMI; |
| if (IS_ALIGNED(dst_width, 2)) { |
| InterpolateRow = InterpolateRow_MMI; |
| } |
| } |
| #endif |
| #if defined(HAS_INTERPOLATEROW_MSA) |
| if (TestCpuFlag(kCpuHasMSA)) { |
| InterpolateRow = InterpolateRow_Any_MSA; |
| if (IS_ALIGNED(dst_width, 8)) { |
| InterpolateRow = InterpolateRow_MSA; |
| } |
| } |
| #endif |
| if (src_width >= 32768) { |
| ScaleUVFilterCols = filtering ? ScaleUVFilterCols64_C : ScaleUVCols64_C; |
| } |
| #if defined(HAS_SCALEUVFILTERCOLS_SSSE3) |
| if (filtering && TestCpuFlag(kCpuHasSSSE3) && src_width < 32768) { |
| ScaleUVFilterCols = ScaleUVFilterCols_SSSE3; |
| } |
| #endif |
| #if defined(HAS_SCALEUVFILTERCOLS_NEON) |
| if (filtering && TestCpuFlag(kCpuHasNEON)) { |
| ScaleUVFilterCols = ScaleUVFilterCols_Any_NEON; |
| if (IS_ALIGNED(dst_width, 4)) { |
| ScaleUVFilterCols = ScaleUVFilterCols_NEON; |
| } |
| } |
| #endif |
| #if defined(HAS_SCALEUVFILTERCOLS_MSA) |
| if (filtering && TestCpuFlag(kCpuHasMSA)) { |
| ScaleUVFilterCols = ScaleUVFilterCols_Any_MSA; |
| if (IS_ALIGNED(dst_width, 8)) { |
| ScaleUVFilterCols = ScaleUVFilterCols_MSA; |
| } |
| } |
| #endif |
| #if defined(HAS_SCALEUVCOLS_SSSE3) |
| if (!filtering && TestCpuFlag(kCpuHasSSSE3) && src_width < 32768) { |
| ScaleUVFilterCols = ScaleUVCols_SSSE3; |
| } |
| #endif |
| #if defined(HAS_SCALEUVCOLS_NEON) |
| if (!filtering && TestCpuFlag(kCpuHasNEON)) { |
| ScaleUVFilterCols = ScaleUVCols_Any_NEON; |
| if (IS_ALIGNED(dst_width, 8)) { |
| ScaleUVFilterCols = ScaleUVCols_NEON; |
| } |
| } |
| #endif |
| #if defined(HAS_SCALEUVCOLS_MMI) |
| if (!filtering && TestCpuFlag(kCpuHasMMI)) { |
| ScaleUVFilterCols = ScaleUVCols_Any_MMI; |
| if (IS_ALIGNED(dst_width, 1)) { |
| ScaleUVFilterCols = ScaleUVCols_MMI; |
| } |
| } |
| #endif |
| #if defined(HAS_SCALEUVCOLS_MSA) |
| if (!filtering && TestCpuFlag(kCpuHasMSA)) { |
| ScaleUVFilterCols = ScaleUVCols_Any_MSA; |
| if (IS_ALIGNED(dst_width, 4)) { |
| ScaleUVFilterCols = ScaleUVCols_MSA; |
| } |
| } |
| #endif |
| if (!filtering && src_width * 2 == dst_width && x < 0x8000) { |
| ScaleUVFilterCols = ScaleUVColsUp2_C; |
| #if defined(HAS_SCALEUVCOLSUP2_SSSE3) |
| if (TestCpuFlag(kCpuHasSSSE3) && IS_ALIGNED(dst_width, 8)) { |
| ScaleUVFilterCols = ScaleUVColsUp2_SSSE3; |
| } |
| #endif |
| #if defined(HAS_SCALEUVCOLSUP2_MMI) |
| if (TestCpuFlag(kCpuHasMMI) && IS_ALIGNED(dst_width, 4)) { |
| ScaleUVFilterCols = ScaleUVColsUp2_MMI; |
| } |
| #endif |
| } |
| |
| if (y > max_y) { |
| y = max_y; |
| } |
| |
| { |
| int yi = y >> 16; |
| const uint8_t* src = src_uv + yi * src_stride; |
| |
| // Allocate 2 rows of UV. |
| const int kRowSize = (dst_width * 2 + 15) & ~15; |
| align_buffer_64(row, kRowSize * 2); |
| |
| uint8_t* rowptr = row; |
| int rowstride = kRowSize; |
| int lasty = yi; |
| |
| ScaleUVFilterCols(rowptr, src, dst_width, x, dx); |
| if (src_height > 1) { |
| src += src_stride; |
| } |
| ScaleUVFilterCols(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_uv + yi * src_stride; |
| } |
| if (yi != lasty) { |
| ScaleUVFilterCols(rowptr, src, dst_width, x, dx); |
| rowptr += rowstride; |
| rowstride = -rowstride; |
| lasty = yi; |
| src += src_stride; |
| } |
| } |
| if (filtering == kFilterLinear) { |
| InterpolateRow(dst_uv, rowptr, 0, dst_width * 2, 0); |
| } else { |
| int yf = (y >> 8) & 255; |
| InterpolateRow(dst_uv, rowptr, rowstride, dst_width * 2, yf); |
| } |
| dst_uv += dst_stride; |
| y += dy; |
| } |
| free_aligned_buffer_64(row); |
| } |
| } |
| #endif // HAS_SCALEUVBILINEARUP |
| |
| // Scale UV 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 ScaleUVSimple(int src_width, |
| int src_height, |
| int dst_width, |
| int dst_height, |
| int src_stride, |
| int dst_stride, |
| const uint8_t* src_uv, |
| uint8_t* dst_uv, |
| int x, |
| int dx, |
| int y, |
| int dy) { |
| int j; |
| void (*ScaleUVCols)(uint8_t * dst_uv, const uint8_t* src_uv, int dst_width, |
| int x, int dx) = |
| (src_width >= 32768) ? ScaleUVCols64_C : ScaleUVCols_C; |
| (void)src_height; |
| #if defined(HAS_SCALEUVCOLS_SSSE3) |
| if (TestCpuFlag(kCpuHasSSSE3) && src_width < 32768) { |
| ScaleUVCols = ScaleUVCols_SSSE3; |
| } |
| #endif |
| #if defined(HAS_SCALEUVCOLS_NEON) |
| if (TestCpuFlag(kCpuHasNEON)) { |
| ScaleUVCols = ScaleUVCols_Any_NEON; |
| if (IS_ALIGNED(dst_width, 8)) { |
| ScaleUVCols = ScaleUVCols_NEON; |
| } |
| } |
| #endif |
| #if defined(HAS_SCALEUVCOLS_MMI) |
| if (TestCpuFlag(kCpuHasMMI)) { |
| ScaleUVCols = ScaleUVCols_Any_MMI; |
| if (IS_ALIGNED(dst_width, 1)) { |
| ScaleUVCols = ScaleUVCols_MMI; |
| } |
| } |
| #endif |
| #if defined(HAS_SCALEUVCOLS_MSA) |
| if (TestCpuFlag(kCpuHasMSA)) { |
| ScaleUVCols = ScaleUVCols_Any_MSA; |
| if (IS_ALIGNED(dst_width, 4)) { |
| ScaleUVCols = ScaleUVCols_MSA; |
| } |
| } |
| #endif |
| if (src_width * 2 == dst_width && x < 0x8000) { |
| ScaleUVCols = ScaleUVColsUp2_C; |
| #if defined(HAS_SCALEUVCOLSUP2_SSSE3) |
| if (TestCpuFlag(kCpuHasSSSE3) && IS_ALIGNED(dst_width, 8)) { |
| ScaleUVCols = ScaleUVColsUp2_SSSE3; |
| } |
| #endif |
| #if defined(HAS_SCALEUVCOLSUP2_MMI) |
| if (TestCpuFlag(kCpuHasMMI) && IS_ALIGNED(dst_width, 4)) { |
| ScaleUVCols = ScaleUVColsUp2_MMI; |
| } |
| #endif |
| } |
| |
| for (j = 0; j < dst_height; ++j) { |
| ScaleUVCols(dst_uv, src_uv + (y >> 16) * src_stride, dst_width, x, dx); |
| dst_uv += dst_stride; |
| y += dy; |
| } |
| } |
| |
| // Copy UV with optional flipping |
| #if HAS_UVCOPY |
| static int UVCopy(const uint8_t* src_UV, |
| int src_stride_UV, |
| uint8_t* dst_UV, |
| int dst_stride_UV, |
| int width, |
| int height) { |
| if (!src_UV || !dst_UV || width <= 0 || height == 0) { |
| return -1; |
| } |
| // Negative height means invert the image. |
| if (height < 0) { |
| height = -height; |
| src_UV = src_UV + (height - 1) * src_stride_UV; |
| src_stride_UV = -src_stride_UV; |
| } |
| |
| CopyPlane(src_UV, src_stride_UV, dst_UV, dst_stride_UV, width * 2, height); |
| return 0; |
| } |
| #endif // HAS_UVCOPY |
| |
| // Scale a UV plane (from NV12) |
| // This function in turn calls a scaling function |
| // suitable for handling the desired resolutions. |
| static void ScaleUV(const uint8_t* src, |
| int src_stride, |
| int src_width, |
| int src_height, |
| uint8_t* dst, |
| int dst_stride, |
| int dst_width, |
| int dst_height, |
| int clip_x, |
| int clip_y, |
| int clip_width, |
| int clip_height, |
| 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; |
| // UV does not support box filter yet, but allow the user to pass it. |
| // Simplify filtering when possible. |
| filtering = ScaleFilterReduce(src_width, src_height, dst_width, dst_height, |
| filtering); |
| |
| // Negative src_height means invert the image. |
| if (src_height < 0) { |
| src_height = -src_height; |
| src = src + (src_height - 1) * src_stride; |
| src_stride = -src_stride; |
| } |
| ScaleSlope(src_width, src_height, dst_width, dst_height, filtering, &x, &y, |
| &dx, &dy); |
| src_width = Abs(src_width); |
| if (clip_x) { |
| int64_t clipf = (int64_t)(clip_x)*dx; |
| x += (clipf & 0xffff); |
| src += (clipf >> 16) * 2; |
| dst += clip_x * 2; |
| } |
| if (clip_y) { |
| int64_t clipf = (int64_t)(clip_y)*dy; |
| y += (clipf & 0xffff); |
| src += (clipf >> 16) * src_stride; |
| dst += clip_y * dst_stride; |
| } |
| |
| // Special case for integer step values. |
| if (((dx | dy) & 0xffff) == 0) { |
| if (!dx || !dy) { // 1 pixel wide and/or tall. |
| filtering = kFilterNone; |
| } else { |
| // Optimized even scale down. ie 2, 4, 6, 8, 10x. |
| if (!(dx & 0x10000) && !(dy & 0x10000)) { |
| #if HAS_SCALEUVDOWN2 |
| if (dx == 0x20000) { |
| // Optimized 1/2 downsample. |
| ScaleUVDown2(src_width, src_height, clip_width, clip_height, |
| src_stride, dst_stride, src, dst, x, dx, y, dy, |
| filtering); |
| return; |
| } |
| #endif |
| #if HAS_SCALEUVDOWN4BOX |
| if (dx == 0x40000 && filtering == kFilterBox) { |
| // Optimized 1/4 box downsample. |
| ScaleUVDown4Box(src_width, src_height, clip_width, clip_height, |
| src_stride, dst_stride, src, dst, x, dx, y, dy); |
| return; |
| } |
| #endif |
| #if HAS_SCALEUVDOWNEVEN |
| ScaleUVDownEven(src_width, src_height, clip_width, clip_height, |
| src_stride, dst_stride, src, dst, x, dx, y, dy, |
| filtering); |
| return; |
| #endif |
| } |
| // Optimized odd scale down. ie 3, 5, 7, 9x. |
| if ((dx & 0x10000) && (dy & 0x10000)) { |
| filtering = kFilterNone; |
| #ifdef HAS_UVCOPY |
| if (dx == 0x10000 && dy == 0x10000) { |
| // Straight copy. |
| UVCopy(src + (y >> 16) * src_stride + (x >> 16) * 2, src_stride, dst, |
| dst_stride, clip_width, clip_height); |
| return; |
| } |
| #endif |
| } |
| } |
| } |
| // HAS_SCALEPLANEVERTICAL |
| if (dx == 0x10000 && (x & 0xffff) == 0) { |
| // Arbitrary scale vertically, but unscaled horizontally. |
| ScalePlaneVertical(src_height, clip_width, clip_height, src_stride, |
| dst_stride, src, dst, x, y, dy, 4, filtering); |
| return; |
| } |
| |
| #if HAS_SCALEUVBILINEARUP |
| if (filtering && dy < 65536) { |
| ScaleUVBilinearUp(src_width, src_height, clip_width, clip_height, |
| src_stride, dst_stride, src, dst, x, dx, y, dy, |
| filtering); |
| return; |
| } |
| #endif |
| #if HAS_SCALEUVBILINEARDOWN |
| if (filtering) { |
| ScaleUVBilinearDown(src_width, src_height, clip_width, clip_height, |
| src_stride, dst_stride, src, dst, x, dx, y, dy, |
| filtering); |
| return; |
| } |
| #endif |
| ScaleUVSimple(src_width, src_height, clip_width, clip_height, src_stride, |
| dst_stride, src, dst, x, dx, y, dy); |
| } |
| |
| // Scale an UV image. |
| LIBYUV_API |
| int UVScale(const uint8_t* src_uv, |
| int src_stride_uv, |
| int src_width, |
| int src_height, |
| uint8_t* dst_uv, |
| int dst_stride_uv, |
| int dst_width, |
| int dst_height, |
| enum FilterMode filtering) { |
| if (!src_uv || src_width == 0 || src_height == 0 || src_width > 32768 || |
| src_height > 32768 || !dst_uv || dst_width <= 0 || dst_height <= 0) { |
| return -1; |
| } |
| ScaleUV(src_uv, src_stride_uv, src_width, src_height, dst_uv, dst_stride_uv, |
| dst_width, dst_height, 0, 0, dst_width, dst_height, filtering); |
| return 0; |
| } |
| |
| #ifdef __cplusplus |
| } // extern "C" |
| } // namespace libyuv |
| #endif |
