libvpx: Add VP9 decoder.

source/libvpx/vp9/encoder/x86/vp9_variance_ssse3.c

+/*
+ *  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 "vpx_config.h"
+#include "vp9/encoder/vp9_variance.h"
+#include "vp9/common/vp9_pragmas.h"
+#include "vpx_ports/mem.h"
+
+#define HALFNDX 8
+
+extern unsigned int vp9_get16x16var_sse2
+(
+  const unsigned char *src_ptr,
+  int source_stride,
+  const unsigned char *ref_ptr,
+  int recon_stride,
+  unsigned int *SSE,
+  int *Sum
+);
+extern void vp9_half_horiz_vert_variance16x_h_sse2
+(
+  const unsigned char *ref_ptr,
+  int ref_pixels_per_line,
+  const unsigned char *src_ptr,
+  int src_pixels_per_line,
+  unsigned int Height,
+  int *sum,
+  unsigned int *sumsquared
+);
+extern void vp9_half_horiz_variance16x_h_sse2
+(
+  const unsigned char *ref_ptr,
+  int ref_pixels_per_line,
+  const unsigned char *src_ptr,
+  int src_pixels_per_line,
+  unsigned int Height,
+  int *sum,
+  unsigned int *sumsquared
+);
+extern void vp9_half_vert_variance16x_h_sse2
+(
+  const unsigned char *ref_ptr,
+  int ref_pixels_per_line,
+  const unsigned char *src_ptr,
+  int src_pixels_per_line,
+  unsigned int Height,
+  int *sum,
+  unsigned int *sumsquared
+);
+extern void vp9_filter_block2d_bil_var_ssse3
+(
+  const unsigned char *ref_ptr,
+  int ref_pixels_per_line,
+  const unsigned char *src_ptr,
+  int src_pixels_per_line,
+  unsigned int Height,
+  int  xoffset,
+  int  yoffset,
+  int *sum,
+  unsigned int *sumsquared
+);
+
+unsigned int vp9_sub_pixel_variance16x16_ssse3
+(
+  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
+) {
+  int xsum0;
+  unsigned int xxsum0;
+
+  // note we could avoid these if statements if the calling function
+  // just called the appropriate functions inside.
+  if (xoffset == HALFNDX && yoffset == 0) {
+    vp9_half_horiz_variance16x_h_sse2(
+      src_ptr, src_pixels_per_line,
+      dst_ptr, dst_pixels_per_line, 16,
+      &xsum0, &xxsum0);
+  } else if (xoffset == 0 && yoffset == HALFNDX) {
+    vp9_half_vert_variance16x_h_sse2(
+      src_ptr, src_pixels_per_line,
+      dst_ptr, dst_pixels_per_line, 16,
+      &xsum0, &xxsum0);
+  } else if (xoffset == HALFNDX && yoffset == HALFNDX) {
+    vp9_half_horiz_vert_variance16x_h_sse2(
+      src_ptr, src_pixels_per_line,
+      dst_ptr, dst_pixels_per_line, 16,
+      &xsum0, &xxsum0);
+  } else {
+    vp9_filter_block2d_bil_var_ssse3(
+      src_ptr, src_pixels_per_line,
+      dst_ptr, dst_pixels_per_line, 16,
+      xoffset, yoffset,
+      &xsum0, &xxsum0);
+  }
+
+  *sse = xxsum0;
+  return (xxsum0 - (((unsigned int)xsum0 * xsum0) >> 8));
+}
+
+unsigned int vp9_sub_pixel_variance16x8_ssse3
+(
+  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
+
+) {
+  int xsum0;
+  unsigned int xxsum0;
+
+  if (xoffset == HALFNDX && yoffset == 0) {
+    vp9_half_horiz_variance16x_h_sse2(
+      src_ptr, src_pixels_per_line,
+      dst_ptr, dst_pixels_per_line, 8,
+      &xsum0, &xxsum0);
+  } else if (xoffset == 0 && yoffset == HALFNDX) {
+    vp9_half_vert_variance16x_h_sse2(
+      src_ptr, src_pixels_per_line,
+      dst_ptr, dst_pixels_per_line, 8,
+      &xsum0, &xxsum0);
+  } else if (xoffset == HALFNDX && yoffset == HALFNDX) {
+    vp9_half_horiz_vert_variance16x_h_sse2(
+      src_ptr, src_pixels_per_line,
+      dst_ptr, dst_pixels_per_line, 8,
+      &xsum0, &xxsum0);
+  } else {
+    vp9_filter_block2d_bil_var_ssse3(
+      src_ptr, src_pixels_per_line,
+      dst_ptr, dst_pixels_per_line, 8,
+      xoffset, yoffset,
+      &xsum0, &xxsum0);
+  }
+
+  *sse = xxsum0;
+  return (xxsum0 - (((unsigned int)xsum0 * xsum0) >> 7));
+}