Add m-esr52 at 52.6.0

1 files changed, 337 insertions, 0 deletions

diff --git a/media/libvpx/vp8/common/variance_c.c b/media/libvpx/vp8/common/variance_c.c
new file mode 100644
index 000000000..02915a4de
--- /dev/null
+++ b/media/libvpx/vp8/common/variance_c.c
@@ -0,0 +1,337 @@
+/*
+ *  Copyright (c) 2010 The WebM 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 "./vp8_rtcd.h"
+#include "filter.h"
+#include "variance.h"
+
+/* This is a bad idea.
+ * ctz = count trailing zeros */
+static int ctz(int a) {
+  int b = 0;
+  while (a != 1) {
+    a >>= 1;
+    b++;
+  }
+  return b;
+}
+
+static unsigned int variance(
+    const unsigned char *src_ptr,
+    int  source_stride,
+    const unsigned char *ref_ptr,
+    int  recon_stride,
+    int  w,
+    int  h,
+    unsigned int *sse)
+{
+    int i, j;
+    int diff, sum;
+
+    sum = 0;
+    *sse = 0;
+
+    for (i = 0; i < h; i++)
+    {
+        for (j = 0; j < w; j++)
+        {
+            diff = src_ptr[j] - ref_ptr[j];
+            sum += diff;
+            *sse += diff * diff;
+        }
+
+        src_ptr += source_stride;
+        ref_ptr += recon_stride;
+    }
+
+    return (*sse - (((unsigned int)sum * sum) >> (int)((ctz(w) + ctz(h)))));
+}
+
+/****************************************************************************
+ *
+ *  ROUTINE       : filter_block2d_bil_first_pass
+ *
+ *  INPUTS        : UINT8  *src_ptr          : Pointer to source block.
+ *                  UINT32 src_pixels_per_line : Stride of input block.
+ *                  UINT32 pixel_step        : Offset between filter input samples (see notes).
+ *                  UINT32 output_height     : Input block height.
+ *                  UINT32 output_width      : Input block width.
+ *                  INT32  *vp8_filter          : Array of 2 bi-linear filter taps.
+ *
+ *  OUTPUTS       : INT32 *output_ptr        : Pointer to filtered block.
+ *
+ *  RETURNS       : void
+ *
+ *  FUNCTION      : Applies a 1-D 2-tap bi-linear filter to the source block in
+ *                  either horizontal or vertical direction to produce the
+ *                  filtered output block. Used to implement first-pass
+ *                  of 2-D separable filter.
+ *
+ *  SPECIAL NOTES : Produces INT32 output to retain precision for next pass.
+ *                  Two filter taps should sum to VP8_FILTER_WEIGHT.
+ *                  pixel_step defines whether the filter is applied
+ *                  horizontally (pixel_step=1) or vertically (pixel_step=stride).
+ *                  It defines the offset required to move from one input
+ *                  to the next.
+ *
+ ****************************************************************************/
+static void var_filter_block2d_bil_first_pass
+(
+    const unsigned char *src_ptr,
+    unsigned short *output_ptr,
+    unsigned int src_pixels_per_line,
+    int pixel_step,
+    unsigned int output_height,
+    unsigned int output_width,
+    const short *vp8_filter
+)
+{
+    unsigned int i, j;
+
+    for (i = 0; i < output_height; i++)
+    {
+        for (j = 0; j < output_width; j++)
+        {
+            /* Apply bilinear filter */
+            output_ptr[j] = (((int)src_ptr[0]          * vp8_filter[0]) +
+                             ((int)src_ptr[pixel_step] * vp8_filter[1]) +
+                             (VP8_FILTER_WEIGHT / 2)) >> VP8_FILTER_SHIFT;
+            src_ptr++;
+        }
+
+        /* Next row... */
+        src_ptr    += src_pixels_per_line - output_width;
+        output_ptr += output_width;
+    }
+}
+
+/****************************************************************************
+ *
+ *  ROUTINE       : filter_block2d_bil_second_pass
+ *
+ *  INPUTS        : INT32  *src_ptr          : Pointer to source block.
+ *                  UINT32 src_pixels_per_line : Stride of input block.
+ *                  UINT32 pixel_step        : Offset between filter input samples (see notes).
+ *                  UINT32 output_height     : Input block height.
+ *                  UINT32 output_width      : Input block width.
+ *                  INT32  *vp8_filter          : Array of 2 bi-linear filter taps.
+ *
+ *  OUTPUTS       : UINT16 *output_ptr       : Pointer to filtered block.
+ *
+ *  RETURNS       : void
+ *
+ *  FUNCTION      : Applies a 1-D 2-tap bi-linear filter to the source block in
+ *                  either horizontal or vertical direction to produce the
+ *                  filtered output block. Used to implement second-pass
+ *                  of 2-D separable filter.
+ *
+ *  SPECIAL NOTES : Requires 32-bit input as produced by filter_block2d_bil_first_pass.
+ *                  Two filter taps should sum to VP8_FILTER_WEIGHT.
+ *                  pixel_step defines whether the filter is applied
+ *                  horizontally (pixel_step=1) or vertically (pixel_step=stride).
+ *                  It defines the offset required to move from one input
+ *                  to the next.
+ *
+ ****************************************************************************/
+static void var_filter_block2d_bil_second_pass
+(
+    const unsigned short *src_ptr,
+    unsigned char  *output_ptr,
+    unsigned int  src_pixels_per_line,
+    unsigned int  pixel_step,
+    unsigned int  output_height,
+    unsigned int  output_width,
+    const short *vp8_filter
+)
+{
+    unsigned int  i, j;
+    int  Temp;
+
+    for (i = 0; i < output_height; i++)
+    {
+        for (j = 0; j < output_width; j++)
+        {
+            /* Apply filter */
+            Temp = ((int)src_ptr[0]          * vp8_filter[0]) +
+                   ((int)src_ptr[pixel_step] * vp8_filter[1]) +
+                   (VP8_FILTER_WEIGHT / 2);
+            output_ptr[j] = (unsigned int)(Temp >> VP8_FILTER_SHIFT);
+            src_ptr++;
+        }
+
+        /* Next row... */
+        src_ptr    += src_pixels_per_line - output_width;
+        output_ptr += output_width;
+    }
+}
+
+
+unsigned int vp8_sub_pixel_variance4x4_c
+(
+    const unsigned char  *src_ptr,
+    int  src_pixels_per_line,
+    int  xoffset,
+    int  yoffset,
+    const unsigned char *dst_ptr,
+    int dst_pixels_per_line,
+    unsigned int *sse
+)
+{
+    unsigned char  temp2[20*16];
+    const short *HFilter, *VFilter;
+    unsigned short FData3[5*4]; /* Temp data bufffer used in filtering */
+
+    HFilter = vp8_bilinear_filters[xoffset];
+    VFilter = vp8_bilinear_filters[yoffset];
+
+    /* First filter 1d Horizontal */
+    var_filter_block2d_bil_first_pass(src_ptr, FData3, src_pixels_per_line, 1, 5, 4, HFilter);
+
+    /* Now filter Verticaly */
+    var_filter_block2d_bil_second_pass(FData3, temp2, 4,  4,  4,  4, VFilter);
+
+    return variance(temp2, 4, dst_ptr, dst_pixels_per_line, 4, 4, sse);
+}
+
+
+unsigned int vp8_sub_pixel_variance8x8_c
+(
+    const unsigned char  *src_ptr,
+    int  src_pixels_per_line,
+    int  xoffset,
+    int  yoffset,
+    const unsigned char *dst_ptr,
+    int dst_pixels_per_line,
+    unsigned int *sse
+)
+{
+    unsigned short FData3[9*8]; /* Temp data bufffer used in filtering */
+    unsigned char  temp2[20*16];
+    const short *HFilter, *VFilter;
+
+    HFilter = vp8_bilinear_filters[xoffset];
+    VFilter = vp8_bilinear_filters[yoffset];
+
+    var_filter_block2d_bil_first_pass(src_ptr, FData3, src_pixels_per_line, 1, 9, 8, HFilter);
+    var_filter_block2d_bil_second_pass(FData3, temp2, 8, 8, 8, 8, VFilter);
+
+    return variance(temp2, 8, dst_ptr, dst_pixels_per_line, 8, 8, sse);
+}
+
+unsigned int vp8_sub_pixel_variance16x16_c
+(
+    const unsigned char  *src_ptr,
+    int  src_pixels_per_line,
+    int  xoffset,
+    int  yoffset,
+    const unsigned char *dst_ptr,
+    int dst_pixels_per_line,
+    unsigned int *sse
+)
+{
+    unsigned short FData3[17*16];   /* Temp data bufffer used in filtering */
+    unsigned char  temp2[20*16];
+    const short *HFilter, *VFilter;
+
+    HFilter = vp8_bilinear_filters[xoffset];
+    VFilter = vp8_bilinear_filters[yoffset];
+
+    var_filter_block2d_bil_first_pass(src_ptr, FData3, src_pixels_per_line, 1, 17, 16, HFilter);
+    var_filter_block2d_bil_second_pass(FData3, temp2, 16, 16, 16, 16, VFilter);
+
+    return variance(temp2, 16, dst_ptr, dst_pixels_per_line, 16, 16, sse);
+}
+
+
+unsigned int vp8_variance_halfpixvar16x16_h_c(
+    const unsigned char *src_ptr,
+    int  source_stride,
+    const unsigned char *ref_ptr,
+    int  recon_stride,
+    unsigned int *sse)
+{
+    return vp8_sub_pixel_variance16x16_c(src_ptr, source_stride, 4, 0,
+                                         ref_ptr, recon_stride, sse);
+}
+
+
+unsigned int vp8_variance_halfpixvar16x16_v_c(
+    const unsigned char *src_ptr,
+    int  source_stride,
+    const unsigned char *ref_ptr,
+    int  recon_stride,
+    unsigned int *sse)
+{
+    return vp8_sub_pixel_variance16x16_c(src_ptr, source_stride, 0, 4,
+                                         ref_ptr, recon_stride, sse);
+}
+
+
+unsigned int vp8_variance_halfpixvar16x16_hv_c(
+    const unsigned char *src_ptr,
+    int  source_stride,
+    const unsigned char *ref_ptr,
+    int  recon_stride,
+    unsigned int *sse)
+{
+    return vp8_sub_pixel_variance16x16_c(src_ptr, source_stride, 4, 4,
+                                         ref_ptr, recon_stride, sse);
+}
+
+
+unsigned int vp8_sub_pixel_variance16x8_c
+(
+    const unsigned char  *src_ptr,
+    int  src_pixels_per_line,
+    int  xoffset,
+    int  yoffset,
+    const unsigned char *dst_ptr,
+    int dst_pixels_per_line,
+    unsigned int *sse
+)
+{
+    unsigned short FData3[16*9];    /* Temp data bufffer used in filtering */
+    unsigned char  temp2[20*16];
+    const short *HFilter, *VFilter;
+
+    HFilter = vp8_bilinear_filters[xoffset];
+    VFilter = vp8_bilinear_filters[yoffset];
+
+    var_filter_block2d_bil_first_pass(src_ptr, FData3, src_pixels_per_line, 1, 9, 16, HFilter);
+    var_filter_block2d_bil_second_pass(FData3, temp2, 16, 16, 8, 16, VFilter);
+
+    return variance(temp2, 16, dst_ptr, dst_pixels_per_line, 16, 8, sse);
+}
+
+unsigned int vp8_sub_pixel_variance8x16_c
+(
+    const unsigned char  *src_ptr,
+    int  src_pixels_per_line,
+    int  xoffset,
+    int  yoffset,
+    const unsigned char *dst_ptr,
+    int dst_pixels_per_line,
+    unsigned int *sse
+)
+{
+    unsigned short FData3[9*16];    /* Temp data bufffer used in filtering */
+    unsigned char  temp2[20*16];
+    const short *HFilter, *VFilter;
+
+
+    HFilter = vp8_bilinear_filters[xoffset];
+    VFilter = vp8_bilinear_filters[yoffset];
+
+
+    var_filter_block2d_bil_first_pass(src_ptr, FData3, src_pixels_per_line, 1, 17, 8, HFilter);
+    var_filter_block2d_bil_second_pass(FData3, temp2, 8, 8, 16, 8, VFilter);
+
+    return variance(temp2, 8, dst_ptr, dst_pixels_per_line, 8, 16, sse);
+}