summaryrefslogtreecommitdiffstats
path: root/media/libyuv/source/scale_argb.cc
diff options
context:
space:
mode:
Diffstat (limited to 'media/libyuv/source/scale_argb.cc')
-rw-r--r--media/libyuv/source/scale_argb.cc859
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