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Diffstat (limited to 'media/libyuv/source/scale_argb.cc')
| -rw-r--r-- | media/libyuv/source/scale_argb.cc | 859 |
1 files changed, 859 insertions, 0 deletions
diff --git a/media/libyuv/source/scale_argb.cc b/media/libyuv/source/scale_argb.cc new file mode 100644 index 000000000..17f51ae9b --- /dev/null +++ b/media/libyuv/source/scale_argb.cc @@ -0,0 +1,859 @@ +/* + * 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 CopyARGB +#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; +} + +// ScaleARGB ARGB, 1/2 +// This is an optimized version for scaling down a ARGB to 1/2 of +// its original size. +static void ScaleARGBDown2(int src_width, int src_height, + int dst_width, int dst_height, + int src_stride, int dst_stride, + const uint8* src_argb, uint8* dst_argb, + int x, int dx, int y, int dy, + enum FilterMode filtering) { + int j; + int row_stride = src_stride * (dy >> 16); + void (*ScaleARGBRowDown2)(const uint8* src_argb, ptrdiff_t src_stride, + uint8* dst_argb, int dst_width) = + filtering == kFilterNone ? ScaleARGBRowDown2_C : + (filtering == kFilterLinear ? ScaleARGBRowDown2Linear_C : + ScaleARGBRowDown2Box_C); + 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_argb += (y >> 16) * src_stride + (x >> 16) * 4; + } else { + src_argb += (y >> 16) * src_stride + ((x >> 16) - 1) * 4; + } + +#if defined(HAS_SCALEARGBROWDOWN2_SSE2) + if (TestCpuFlag(kCpuHasSSE2)) { + ScaleARGBRowDown2 = filtering == kFilterNone ? ScaleARGBRowDown2_Any_SSE2 : + (filtering == kFilterLinear ? ScaleARGBRowDown2Linear_Any_SSE2 : + ScaleARGBRowDown2Box_Any_SSE2); + if (IS_ALIGNED(dst_width, 4)) { + ScaleARGBRowDown2 = filtering == kFilterNone ? ScaleARGBRowDown2_SSE2 : + (filtering == kFilterLinear ? ScaleARGBRowDown2Linear_SSE2 : + ScaleARGBRowDown2Box_SSE2); + } + } +#endif +#if defined(HAS_SCALEARGBROWDOWN2_NEON) + if (TestCpuFlag(kCpuHasNEON)) { + ScaleARGBRowDown2 = filtering == kFilterNone ? ScaleARGBRowDown2_Any_NEON : + (filtering == kFilterLinear ? ScaleARGBRowDown2Linear_Any_NEON : + ScaleARGBRowDown2Box_Any_NEON); + if (IS_ALIGNED(dst_width, 8)) { + ScaleARGBRowDown2 = filtering == kFilterNone ? ScaleARGBRowDown2_NEON : + (filtering == kFilterLinear ? ScaleARGBRowDown2Linear_NEON : + ScaleARGBRowDown2Box_NEON); + } + } +#endif + + if (filtering == kFilterLinear) { + src_stride = 0; + } + for (j = 0; j < dst_height; ++j) { + ScaleARGBRowDown2(src_argb, src_stride, dst_argb, dst_width); + src_argb += row_stride; + dst_argb += dst_stride; + } +} + +// ScaleARGB ARGB, 1/4 +// This is an optimized version for scaling down a ARGB to 1/4 of +// its original size. +static void ScaleARGBDown4Box(int src_width, int src_height, + int dst_width, int dst_height, + int src_stride, int dst_stride, + const uint8* src_argb, uint8* dst_argb, + int x, int dx, int y, int dy) { + int j; + // Allocate 2 rows of ARGB. + const int kRowSize = (dst_width * 2 * 4 + 31) & ~31; + align_buffer_64(row, kRowSize * 2); + int row_stride = src_stride * (dy >> 16); + void (*ScaleARGBRowDown2)(const uint8* src_argb, ptrdiff_t src_stride, + uint8* dst_argb, int dst_width) = ScaleARGBRowDown2Box_C; + // Advance to odd row, even column. + src_argb += (y >> 16) * src_stride + (x >> 16) * 4; + assert(dx == 65536 * 4); // Test scale factor of 4. + assert((dy & 0x3ffff) == 0); // Test vertical scale is multiple of 4. +#if defined(HAS_SCALEARGBROWDOWN2_SSE2) + if (TestCpuFlag(kCpuHasSSE2)) { + ScaleARGBRowDown2 = ScaleARGBRowDown2Box_Any_SSE2; + if (IS_ALIGNED(dst_width, 4)) { + ScaleARGBRowDown2 = ScaleARGBRowDown2Box_SSE2; + } + } +#endif +#if defined(HAS_SCALEARGBROWDOWN2_NEON) + if (TestCpuFlag(kCpuHasNEON)) { + ScaleARGBRowDown2 = ScaleARGBRowDown2Box_Any_NEON; + if (IS_ALIGNED(dst_width, 8)) { + ScaleARGBRowDown2 = ScaleARGBRowDown2Box_NEON; + } + } +#endif + + for (j = 0; j < dst_height; ++j) { + ScaleARGBRowDown2(src_argb, src_stride, row, dst_width * 2); + ScaleARGBRowDown2(src_argb + src_stride * 2, src_stride, + row + kRowSize, dst_width * 2); + ScaleARGBRowDown2(row, kRowSize, dst_argb, dst_width); + src_argb += row_stride; + dst_argb += dst_stride; + } + free_aligned_buffer_64(row); +} + +// ScaleARGB ARGB Even +// This is an optimized version for scaling down a ARGB to even +// multiple of its original size. +static void ScaleARGBDownEven(int src_width, int src_height, + int dst_width, int dst_height, + int src_stride, int dst_stride, + const uint8* src_argb, uint8* dst_argb, + 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 (*ScaleARGBRowDownEven)(const uint8* src_argb, ptrdiff_t src_stride, + int src_step, uint8* dst_argb, int dst_width) = + filtering ? ScaleARGBRowDownEvenBox_C : ScaleARGBRowDownEven_C; + assert(IS_ALIGNED(src_width, 2)); + assert(IS_ALIGNED(src_height, 2)); + src_argb += (y >> 16) * src_stride + (x >> 16) * 4; +#if defined(HAS_SCALEARGBROWDOWNEVEN_SSE2) + if (TestCpuFlag(kCpuHasSSE2)) { + ScaleARGBRowDownEven = filtering ? ScaleARGBRowDownEvenBox_Any_SSE2 : + ScaleARGBRowDownEven_Any_SSE2; + if (IS_ALIGNED(dst_width, 4)) { + ScaleARGBRowDownEven = filtering ? ScaleARGBRowDownEvenBox_SSE2 : + ScaleARGBRowDownEven_SSE2; + } + } +#endif +#if defined(HAS_SCALEARGBROWDOWNEVEN_NEON) + if (TestCpuFlag(kCpuHasNEON)) { + ScaleARGBRowDownEven = filtering ? ScaleARGBRowDownEvenBox_Any_NEON : + ScaleARGBRowDownEven_Any_NEON; + if (IS_ALIGNED(dst_width, 4)) { + ScaleARGBRowDownEven = filtering ? ScaleARGBRowDownEvenBox_NEON : + ScaleARGBRowDownEven_NEON; + } + } +#endif + + if (filtering == kFilterLinear) { + src_stride = 0; + } + for (j = 0; j < dst_height; ++j) { + ScaleARGBRowDownEven(src_argb, src_stride, col_step, dst_argb, dst_width); + src_argb += row_stride; + dst_argb += dst_stride; + } +} + +// Scale ARGB down with bilinear interpolation. +static void ScaleARGBBilinearDown(int src_width, int src_height, + int dst_width, int dst_height, + int src_stride, int dst_stride, + const uint8* src_argb, uint8* dst_argb, + int x, int dx, int y, int dy, + enum FilterMode filtering) { + int j; + void (*InterpolateRow)(uint8* dst_argb, const uint8* src_argb, + ptrdiff_t src_stride, int dst_width, int source_y_fraction) = + InterpolateRow_C; + void (*ScaleARGBFilterCols)(uint8* dst_argb, const uint8* src_argb, + int dst_width, int x, int dx) = + (src_width >= 32768) ? ScaleARGBFilterCols64_C : ScaleARGBFilterCols_C; + int64 xlast = x + (int64)(dst_width - 1) * dx; + int64 xl = (dx >= 0) ? x : xlast; + int64 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) * 4; // Width aligned to 4. + src_argb += xl * 4; + 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_DSPR2) + if (TestCpuFlag(kCpuHasDSPR2) && + IS_ALIGNED(src_argb, 4) && IS_ALIGNED(src_stride, 4)) { + InterpolateRow = InterpolateRow_Any_DSPR2; + if (IS_ALIGNED(clip_src_width, 4)) { + InterpolateRow = InterpolateRow_DSPR2; + } + } +#endif +#if defined(HAS_SCALEARGBFILTERCOLS_SSSE3) + if (TestCpuFlag(kCpuHasSSSE3) && src_width < 32768) { + ScaleARGBFilterCols = ScaleARGBFilterCols_SSSE3; + } +#endif +#if defined(HAS_SCALEARGBFILTERCOLS_NEON) + if (TestCpuFlag(kCpuHasNEON)) { + ScaleARGBFilterCols = ScaleARGBFilterCols_Any_NEON; + if (IS_ALIGNED(dst_width, 4)) { + ScaleARGBFilterCols = ScaleARGBFilterCols_NEON; + } + } +#endif + // TODO(fbarchard): Consider not allocating row buffer for kFilterLinear. + // Allocate a row of ARGB. + { + align_buffer_64(row, clip_src_width * 4); + + 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* src = src_argb + yi * src_stride; + if (filtering == kFilterLinear) { + ScaleARGBFilterCols(dst_argb, src, dst_width, x, dx); + } else { + int yf = (y >> 8) & 255; + InterpolateRow(row, src, src_stride, clip_src_width, yf); + ScaleARGBFilterCols(dst_argb, row, dst_width, x, dx); + } + dst_argb += dst_stride; + y += dy; + if (y > max_y) { + y = max_y; + } + } + free_aligned_buffer_64(row); + } +} + +// Scale ARGB up with bilinear interpolation. +static void ScaleARGBBilinearUp(int src_width, int src_height, + int dst_width, int dst_height, + int src_stride, int dst_stride, + const uint8* src_argb, uint8* dst_argb, + int x, int dx, int y, int dy, + enum FilterMode filtering) { + int j; + void (*InterpolateRow)(uint8* dst_argb, const uint8* src_argb, + ptrdiff_t src_stride, int dst_width, int source_y_fraction) = + InterpolateRow_C; + void (*ScaleARGBFilterCols)(uint8* dst_argb, const uint8* src_argb, + int dst_width, int x, int dx) = + filtering ? ScaleARGBFilterCols_C : ScaleARGBCols_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_DSPR2) + if (TestCpuFlag(kCpuHasDSPR2) && + IS_ALIGNED(dst_argb, 4) && IS_ALIGNED(dst_stride, 4)) { + InterpolateRow = InterpolateRow_DSPR2; + } +#endif + if (src_width >= 32768) { + ScaleARGBFilterCols = filtering ? + ScaleARGBFilterCols64_C : ScaleARGBCols64_C; + } +#if defined(HAS_SCALEARGBFILTERCOLS_SSSE3) + if (filtering && TestCpuFlag(kCpuHasSSSE3) && src_width < 32768) { + ScaleARGBFilterCols = ScaleARGBFilterCols_SSSE3; + } +#endif +#if defined(HAS_SCALEARGBFILTERCOLS_NEON) + if (filtering && TestCpuFlag(kCpuHasNEON)) { + ScaleARGBFilterCols = ScaleARGBFilterCols_Any_NEON; + if (IS_ALIGNED(dst_width, 4)) { + ScaleARGBFilterCols = ScaleARGBFilterCols_NEON; + } + } +#endif +#if defined(HAS_SCALEARGBCOLS_SSE2) + if (!filtering && TestCpuFlag(kCpuHasSSE2) && src_width < 32768) { + ScaleARGBFilterCols = ScaleARGBCols_SSE2; + } +#endif +#if defined(HAS_SCALEARGBCOLS_NEON) + if (!filtering && TestCpuFlag(kCpuHasNEON)) { + ScaleARGBFilterCols = ScaleARGBCols_Any_NEON; + if (IS_ALIGNED(dst_width, 8)) { + ScaleARGBFilterCols = ScaleARGBCols_NEON; + } + } +#endif + if (!filtering && src_width * 2 == dst_width && x < 0x8000) { + ScaleARGBFilterCols = ScaleARGBColsUp2_C; +#if defined(HAS_SCALEARGBCOLSUP2_SSE2) + if (TestCpuFlag(kCpuHasSSE2) && IS_ALIGNED(dst_width, 8)) { + ScaleARGBFilterCols = ScaleARGBColsUp2_SSE2; + } +#endif + } + + if (y > max_y) { + y = max_y; + } + + { + int yi = y >> 16; + const uint8* src = src_argb + yi * src_stride; + + // Allocate 2 rows of ARGB. + const int kRowSize = (dst_width * 4 + 31) & ~31; + align_buffer_64(row, kRowSize * 2); + + uint8* rowptr = row; + int rowstride = kRowSize; + int lasty = yi; + + ScaleARGBFilterCols(rowptr, src, dst_width, x, dx); + if (src_height > 1) { + src += src_stride; + } + ScaleARGBFilterCols(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_argb + yi * src_stride; + } + if (yi != lasty) { + ScaleARGBFilterCols(rowptr, src, dst_width, x, dx); + rowptr += rowstride; + rowstride = -rowstride; + lasty = yi; + src += src_stride; + } + } + if (filtering == kFilterLinear) { + InterpolateRow(dst_argb, rowptr, 0, dst_width * 4, 0); + } else { + int yf = (y >> 8) & 255; + InterpolateRow(dst_argb, rowptr, rowstride, dst_width * 4, yf); + } + dst_argb += dst_stride; + y += dy; + } + free_aligned_buffer_64(row); + } +} + +#ifdef YUVSCALEUP +// Scale YUV to ARGB up with bilinear interpolation. +static void ScaleYUVToARGBBilinearUp(int src_width, int src_height, + int dst_width, int dst_height, + int src_stride_y, + int src_stride_u, + int src_stride_v, + int dst_stride_argb, + const uint8* src_y, + const uint8* src_u, + const uint8* src_v, + uint8* dst_argb, + int x, int dx, int y, int dy, + enum FilterMode filtering) { + int j; + void (*I422ToARGBRow)(const uint8* y_buf, + const uint8* u_buf, + const uint8* v_buf, + uint8* rgb_buf, + int width) = I422ToARGBRow_C; +#if defined(HAS_I422TOARGBROW_SSSE3) + if (TestCpuFlag(kCpuHasSSSE3)) { + I422ToARGBRow = I422ToARGBRow_Any_SSSE3; + if (IS_ALIGNED(src_width, 8)) { + I422ToARGBRow = I422ToARGBRow_SSSE3; + } + } +#endif +#if defined(HAS_I422TOARGBROW_AVX2) + if (TestCpuFlag(kCpuHasAVX2)) { + I422ToARGBRow = I422ToARGBRow_Any_AVX2; + if (IS_ALIGNED(src_width, 16)) { + I422ToARGBRow = I422ToARGBRow_AVX2; + } + } +#endif +#if defined(HAS_I422TOARGBROW_NEON) + if (TestCpuFlag(kCpuHasNEON)) { + I422ToARGBRow = I422ToARGBRow_Any_NEON; + if (IS_ALIGNED(src_width, 8)) { + I422ToARGBRow = I422ToARGBRow_NEON; + } + } +#endif +#if defined(HAS_I422TOARGBROW_DSPR2) + if (TestCpuFlag(kCpuHasDSPR2) && IS_ALIGNED(src_width, 4) && + IS_ALIGNED(src_y, 4) && IS_ALIGNED(src_stride_y, 4) && + IS_ALIGNED(src_u, 2) && IS_ALIGNED(src_stride_u, 2) && + IS_ALIGNED(src_v, 2) && IS_ALIGNED(src_stride_v, 2) && + IS_ALIGNED(dst_argb, 4) && IS_ALIGNED(dst_stride_argb, 4)) { + I422ToARGBRow = I422ToARGBRow_DSPR2; + } +#endif + + void (*InterpolateRow)(uint8* dst_argb, const uint8* src_argb, + ptrdiff_t src_stride, int dst_width, int source_y_fraction) = + InterpolateRow_C; +#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_DSPR2) + if (TestCpuFlag(kCpuHasDSPR2) && + IS_ALIGNED(dst_argb, 4) && IS_ALIGNED(dst_stride_argb, 4)) { + InterpolateRow = InterpolateRow_DSPR2; + } +#endif + + void (*ScaleARGBFilterCols)(uint8* dst_argb, const uint8* src_argb, + int dst_width, int x, int dx) = + filtering ? ScaleARGBFilterCols_C : ScaleARGBCols_C; + if (src_width >= 32768) { + ScaleARGBFilterCols = filtering ? + ScaleARGBFilterCols64_C : ScaleARGBCols64_C; + } +#if defined(HAS_SCALEARGBFILTERCOLS_SSSE3) + if (filtering && TestCpuFlag(kCpuHasSSSE3) && src_width < 32768) { + ScaleARGBFilterCols = ScaleARGBFilterCols_SSSE3; + } +#endif +#if defined(HAS_SCALEARGBFILTERCOLS_NEON) + if (filtering && TestCpuFlag(kCpuHasNEON)) { + ScaleARGBFilterCols = ScaleARGBFilterCols_Any_NEON; + if (IS_ALIGNED(dst_width, 4)) { + ScaleARGBFilterCols = ScaleARGBFilterCols_NEON; + } + } +#endif +#if defined(HAS_SCALEARGBCOLS_SSE2) + if (!filtering && TestCpuFlag(kCpuHasSSE2) && src_width < 32768) { + ScaleARGBFilterCols = ScaleARGBCols_SSE2; + } +#endif +#if defined(HAS_SCALEARGBCOLS_NEON) + if (!filtering && TestCpuFlag(kCpuHasNEON)) { + ScaleARGBFilterCols = ScaleARGBCols_Any_NEON; + if (IS_ALIGNED(dst_width, 8)) { + ScaleARGBFilterCols = ScaleARGBCols_NEON; + } + } +#endif + if (!filtering && src_width * 2 == dst_width && x < 0x8000) { + ScaleARGBFilterCols = ScaleARGBColsUp2_C; +#if defined(HAS_SCALEARGBCOLSUP2_SSE2) + if (TestCpuFlag(kCpuHasSSE2) && IS_ALIGNED(dst_width, 8)) { + ScaleARGBFilterCols = ScaleARGBColsUp2_SSE2; + } +#endif + } + + const int max_y = (src_height - 1) << 16; + if (y > max_y) { + y = max_y; + } + const int kYShift = 1; // Shift Y by 1 to convert Y plane to UV coordinate. + int yi = y >> 16; + int uv_yi = yi >> kYShift; + const uint8* src_row_y = src_y + yi * src_stride_y; + const uint8* src_row_u = src_u + uv_yi * src_stride_u; + const uint8* src_row_v = src_v + uv_yi * src_stride_v; + + // Allocate 2 rows of ARGB. + const int kRowSize = (dst_width * 4 + 31) & ~31; + align_buffer_64(row, kRowSize * 2); + + // Allocate 1 row of ARGB for source conversion. + align_buffer_64(argb_row, src_width * 4); + + uint8* rowptr = row; + int rowstride = kRowSize; + int lasty = yi; + + // TODO(fbarchard): Convert first 2 rows of YUV to ARGB. + ScaleARGBFilterCols(rowptr, src_row_y, dst_width, x, dx); + if (src_height > 1) { + src_row_y += src_stride_y; + if (yi & 1) { + src_row_u += src_stride_u; + src_row_v += src_stride_v; + } + } + ScaleARGBFilterCols(rowptr + rowstride, src_row_y, dst_width, x, dx); + if (src_height > 2) { + src_row_y += src_stride_y; + if (!(yi & 1)) { + src_row_u += src_stride_u; + src_row_v += src_stride_v; + } + } + + for (j = 0; j < dst_height; ++j) { + yi = y >> 16; + if (yi != lasty) { + if (y > max_y) { + y = max_y; + yi = y >> 16; + uv_yi = yi >> kYShift; + src_row_y = src_y + yi * src_stride_y; + src_row_u = src_u + uv_yi * src_stride_u; + src_row_v = src_v + uv_yi * src_stride_v; + } + if (yi != lasty) { + // TODO(fbarchard): Convert the clipped region of row. + I422ToARGBRow(src_row_y, src_row_u, src_row_v, argb_row, src_width); + ScaleARGBFilterCols(rowptr, argb_row, dst_width, x, dx); + rowptr += rowstride; + rowstride = -rowstride; + lasty = yi; + src_row_y += src_stride_y; + if (yi & 1) { + src_row_u += src_stride_u; + src_row_v += src_stride_v; + } + } + } + if (filtering == kFilterLinear) { + InterpolateRow(dst_argb, rowptr, 0, dst_width * 4, 0); + } else { + int yf = (y >> 8) & 255; + InterpolateRow(dst_argb, rowptr, rowstride, dst_width * 4, yf); + } + dst_argb += dst_stride_argb; + y += dy; + } + free_aligned_buffer_64(row); + free_aligned_buffer_64(row_argb); +} +#endif + +// Scale ARGB 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 ScaleARGBSimple(int src_width, int src_height, + int dst_width, int dst_height, + int src_stride, int dst_stride, + const uint8* src_argb, uint8* dst_argb, + int x, int dx, int y, int dy) { + int j; + void (*ScaleARGBCols)(uint8* dst_argb, const uint8* src_argb, + int dst_width, int x, int dx) = + (src_width >= 32768) ? ScaleARGBCols64_C : ScaleARGBCols_C; +#if defined(HAS_SCALEARGBCOLS_SSE2) + if (TestCpuFlag(kCpuHasSSE2) && src_width < 32768) { + ScaleARGBCols = ScaleARGBCols_SSE2; + } +#endif +#if defined(HAS_SCALEARGBCOLS_NEON) + if (TestCpuFlag(kCpuHasNEON)) { + ScaleARGBCols = ScaleARGBCols_Any_NEON; + if (IS_ALIGNED(dst_width, 8)) { + ScaleARGBCols = ScaleARGBCols_NEON; + } + } +#endif + if (src_width * 2 == dst_width && x < 0x8000) { + ScaleARGBCols = ScaleARGBColsUp2_C; +#if defined(HAS_SCALEARGBCOLSUP2_SSE2) + if (TestCpuFlag(kCpuHasSSE2) && IS_ALIGNED(dst_width, 8)) { + ScaleARGBCols = ScaleARGBColsUp2_SSE2; + } +#endif + } + + for (j = 0; j < dst_height; ++j) { + ScaleARGBCols(dst_argb, src_argb + (y >> 16) * src_stride, + dst_width, x, dx); + dst_argb += dst_stride; + y += dy; + } +} + +// ScaleARGB a ARGB. +// This function in turn calls a scaling function +// suitable for handling the desired resolutions. +static void ScaleARGB(const uint8* src, int src_stride, + int src_width, int src_height, + uint8* 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; + // ARGB 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 clipf = (int64)(clip_x) * dx; + x += (clipf & 0xffff); + src += (clipf >> 16) * 4; + dst += clip_x * 4; + } + if (clip_y) { + int64 clipf = (int64)(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 (dx == 0x20000) { + // Optimized 1/2 downsample. + ScaleARGBDown2(src_width, src_height, + clip_width, clip_height, + src_stride, dst_stride, src, dst, + x, dx, y, dy, filtering); + return; + } + if (dx == 0x40000 && filtering == kFilterBox) { + // Optimized 1/4 box downsample. + ScaleARGBDown4Box(src_width, src_height, + clip_width, clip_height, + src_stride, dst_stride, src, dst, + x, dx, y, dy); + return; + } + ScaleARGBDownEven(src_width, src_height, + clip_width, clip_height, + src_stride, dst_stride, src, dst, + x, dx, y, dy, filtering); + return; + } + // Optimized odd scale down. ie 3, 5, 7, 9x. + if ((dx & 0x10000) && (dy & 0x10000)) { + filtering = kFilterNone; + if (dx == 0x10000 && dy == 0x10000) { + // Straight copy. + ARGBCopy(src + (y >> 16) * src_stride + (x >> 16) * 4, src_stride, + dst, dst_stride, clip_width, clip_height); + return; + } + } + } + } + if (dx == 0x10000 && (x & 0xffff) == 0) { + // Arbitrary scale vertically, but unscaled vertically. + ScalePlaneVertical(src_height, + clip_width, clip_height, + src_stride, dst_stride, src, dst, + x, y, dy, 4, filtering); + return; + } + if (filtering && dy < 65536) { + ScaleARGBBilinearUp(src_width, src_height, + clip_width, clip_height, + src_stride, dst_stride, src, dst, + x, dx, y, dy, filtering); + return; + } + if (filtering) { + ScaleARGBBilinearDown(src_width, src_height, + clip_width, clip_height, + src_stride, dst_stride, src, dst, + x, dx, y, dy, filtering); + return; + } + ScaleARGBSimple(src_width, src_height, clip_width, clip_height, + src_stride, dst_stride, src, dst, + x, dx, y, dy); +} + +LIBYUV_API +int ARGBScaleClip(const uint8* src_argb, int src_stride_argb, + int src_width, int src_height, + uint8* dst_argb, int dst_stride_argb, + int dst_width, int dst_height, + int clip_x, int clip_y, int clip_width, int clip_height, + enum FilterMode filtering) { + if (!src_argb || src_width == 0 || src_height == 0 || + !dst_argb || dst_width <= 0 || dst_height <= 0 || + clip_x < 0 || clip_y < 0 || + clip_width > 32768 || clip_height > 32768 || + (clip_x + clip_width) > dst_width || + (clip_y + clip_height) > dst_height) { + return -1; + } + ScaleARGB(src_argb, src_stride_argb, src_width, src_height, + dst_argb, dst_stride_argb, dst_width, dst_height, + clip_x, clip_y, clip_width, clip_height, filtering); + return 0; +} + +// Scale an ARGB image. +LIBYUV_API +int ARGBScale(const uint8* src_argb, int src_stride_argb, + int src_width, int src_height, + uint8* dst_argb, int dst_stride_argb, + int dst_width, int dst_height, + enum FilterMode filtering) { + if (!src_argb || src_width == 0 || src_height == 0 || + src_width > 32768 || src_height > 32768 || + !dst_argb || dst_width <= 0 || dst_height <= 0) { + return -1; + } + ScaleARGB(src_argb, src_stride_argb, src_width, src_height, + dst_argb, dst_stride_argb, dst_width, dst_height, + 0, 0, dst_width, dst_height, filtering); + return 0; +} + +// Scale with YUV conversion to ARGB and clipping. +LIBYUV_API +int YUVToARGBScaleClip(const uint8* src_y, int src_stride_y, + const uint8* src_u, int src_stride_u, + const uint8* src_v, int src_stride_v, + uint32 src_fourcc, + int src_width, int src_height, + uint8* dst_argb, int dst_stride_argb, + uint32 dst_fourcc, + int dst_width, int dst_height, + int clip_x, int clip_y, int clip_width, int clip_height, + enum FilterMode filtering) { + uint8* argb_buffer = (uint8*)malloc(src_width * src_height * 4); + int r; + I420ToARGB(src_y, src_stride_y, + src_u, src_stride_u, + src_v, src_stride_v, + argb_buffer, src_width * 4, + src_width, src_height); + + r = ARGBScaleClip(argb_buffer, src_width * 4, + src_width, src_height, + dst_argb, dst_stride_argb, + dst_width, dst_height, + clip_x, clip_y, clip_width, clip_height, + filtering); + free(argb_buffer); + return r; +} + +#ifdef __cplusplus +} // extern "C" +} // namespace libyuv +#endif |