libvpx: Add VP9 decoder.

source/libvpx/vp9/encoder/vp9_variance_c.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 "vp9/encoder/vp9_variance.h"
+#include "vp9/common/vp9_filter.h"
+#include "vp9/common/vp9_subpelvar.h"
+#include "vpx/vpx_integer.h"
+
+unsigned int vp9_get_mb_ss_c(const short *src_ptr) {
+  unsigned int i, sum = 0;
+
+  for (i = 0; i < 256; i++) {
+    sum += (src_ptr[i] * src_ptr[i]);
+  }
+
+  return sum;
+}
+
+
+
+#if CONFIG_SUPERBLOCKS
+unsigned int vp9_variance32x32_c(const unsigned char *src_ptr,
+                                 int  source_stride,
+                                 const unsigned char *ref_ptr,
+                                 int  recon_stride,
+                                 unsigned int *sse) {
+  unsigned int var;
+  int avg;
+
+  variance(src_ptr, source_stride, ref_ptr, recon_stride, 32, 32, &var, &avg);
+  *sse = var;
+  return (var - (((int64_t)avg * avg) >> 10));
+}
+#endif
+
+unsigned int vp9_variance16x16_c(const unsigned char *src_ptr,
+                                 int  source_stride,
+                                 const unsigned char *ref_ptr,
+                                 int  recon_stride,
+                                 unsigned int *sse) {
+  unsigned int var;
+  int avg;
+
+  variance(src_ptr, source_stride, ref_ptr, recon_stride, 16, 16, &var, &avg);
+  *sse = var;
+  return (var - (((unsigned int)avg * avg) >> 8));
+}
+
+unsigned int vp9_variance8x16_c(const unsigned char *src_ptr,
+                                int  source_stride,
+                                const unsigned char *ref_ptr,
+                                int  recon_stride,
+                                unsigned int *sse) {
+  unsigned int var;
+  int avg;
+
+  variance(src_ptr, source_stride, ref_ptr, recon_stride, 8, 16, &var, &avg);
+  *sse = var;
+  return (var - (((unsigned int)avg * avg) >> 7));
+}
+
+unsigned int vp9_variance16x8_c(const unsigned char *src_ptr,
+                                int  source_stride,
+                                const unsigned char *ref_ptr,
+                                int  recon_stride,
+                                unsigned int *sse) {
+  unsigned int var;
+  int avg;
+
+  variance(src_ptr, source_stride, ref_ptr, recon_stride, 16, 8, &var, &avg);
+  *sse = var;
+  return (var - (((unsigned int)avg * avg) >> 7));
+}
+
+
+unsigned int vp9_variance8x8_c(const unsigned char *src_ptr,
+                               int  source_stride,
+                               const unsigned char *ref_ptr,
+                               int  recon_stride,
+                               unsigned int *sse) {
+  unsigned int var;
+  int avg;
+
+  variance(src_ptr, source_stride, ref_ptr, recon_stride, 8, 8, &var, &avg);
+  *sse = var;
+  return (var - (((unsigned int)avg * avg) >> 6));
+}
+
+unsigned int vp9_variance4x4_c(const unsigned char *src_ptr,
+                               int  source_stride,
+                               const unsigned char *ref_ptr,
+                               int  recon_stride,
+                               unsigned int *sse) {
+  unsigned int var;
+  int avg;
+
+  variance(src_ptr, source_stride, ref_ptr, recon_stride, 4, 4, &var, &avg);
+  *sse = var;
+  return (var - (((unsigned int)avg * avg) >> 4));
+}
+
+
+unsigned int vp9_mse16x16_c(const unsigned char *src_ptr,
+                            int  source_stride,
+                            const unsigned char *ref_ptr,
+                            int  recon_stride,
+                            unsigned int *sse) {
+  unsigned int var;
+  int avg;
+
+  variance(src_ptr, source_stride, ref_ptr, recon_stride, 16, 16, &var, &avg);
+  *sse = var;
+  return var;
+}
+
+
+unsigned int vp9_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 = vp9_bilinear_filters[xoffset];
+  VFilter = vp9_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 vp9_variance4x4_c(temp2, 4, dst_ptr, dst_pixels_per_line, sse);
+}
+
+
+unsigned int vp9_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 = vp9_bilinear_filters[xoffset];
+  VFilter = vp9_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 vp9_variance8x8_c(temp2, 8, dst_ptr, dst_pixels_per_line, sse);
+}
+
+unsigned int vp9_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 = vp9_bilinear_filters[xoffset];
+  VFilter = vp9_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 vp9_variance16x16_c(temp2, 16, dst_ptr, dst_pixels_per_line, sse);
+}
+
+#if CONFIG_SUPERBLOCKS
+unsigned int vp9_sub_pixel_variance32x32_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[33 * 32]; // Temp data bufffer used in filtering
+  unsigned char  temp2[36 * 32];
+  const short *HFilter, *VFilter;
+
+  HFilter = vp9_bilinear_filters[xoffset];
+  VFilter = vp9_bilinear_filters[yoffset];
+
+  var_filter_block2d_bil_first_pass(src_ptr, FData3, src_pixels_per_line, 1, 33, 32, HFilter);
+  var_filter_block2d_bil_second_pass(FData3, temp2, 32, 32, 32, 32, VFilter);
+
+  return vp9_variance32x32_c(temp2, 32, dst_ptr, dst_pixels_per_line, sse);
+}
+#endif
+
+unsigned int vp9_variance_halfpixvar16x16_h_c(const unsigned char *src_ptr,
+                                              int  source_stride,
+                                              const unsigned char *ref_ptr,
+                                              int  recon_stride,
+                                              unsigned int *sse) {
+  return vp9_sub_pixel_variance16x16_c(src_ptr, source_stride, 8, 0,
+                                       ref_ptr, recon_stride, sse);
+}
+
+#if CONFIG_SUPERBLOCKS
+unsigned int vp9_variance_halfpixvar32x32_h_c(const unsigned char *src_ptr,
+                                              int  source_stride,
+                                              const unsigned char *ref_ptr,
+                                              int  recon_stride,
+                                              unsigned int *sse) {
+  return vp9_sub_pixel_variance32x32_c(src_ptr, source_stride, 8, 0,
+                                       ref_ptr, recon_stride, sse);
+}
+#endif
+
+
+unsigned int vp9_variance_halfpixvar16x16_v_c(const unsigned char *src_ptr,
+                                              int  source_stride,
+                                              const unsigned char *ref_ptr,
+                                              int  recon_stride,
+                                              unsigned int *sse) {
+  return vp9_sub_pixel_variance16x16_c(src_ptr, source_stride, 0, 8,
+                                       ref_ptr, recon_stride, sse);
+}
+
+#if CONFIG_SUPERBLOCKS
+unsigned int vp9_variance_halfpixvar32x32_v_c(const unsigned char *src_ptr,
+                                              int  source_stride,
+                                              const unsigned char *ref_ptr,
+                                              int  recon_stride,
+                                              unsigned int *sse) {
+  return vp9_sub_pixel_variance32x32_c(src_ptr, source_stride, 0, 8,
+                                       ref_ptr, recon_stride, sse);
+}
+#endif
+
+unsigned int vp9_variance_halfpixvar16x16_hv_c(const unsigned char *src_ptr,
+                                               int  source_stride,
+                                               const unsigned char *ref_ptr,
+                                               int  recon_stride,
+                                               unsigned int *sse) {
+  return vp9_sub_pixel_variance16x16_c(src_ptr, source_stride, 8, 8,
+                                       ref_ptr, recon_stride, sse);
+}
+
+#if CONFIG_SUPERBLOCKS
+unsigned int vp9_variance_halfpixvar32x32_hv_c(const unsigned char *src_ptr,
+                                               int  source_stride,
+                                               const unsigned char *ref_ptr,
+                                               int  recon_stride,
+                                               unsigned int *sse) {
+  return vp9_sub_pixel_variance32x32_c(src_ptr, source_stride, 8, 8,
+                                       ref_ptr, recon_stride, sse);
+}
+#endif
+
+unsigned int vp9_sub_pixel_mse16x16_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) {
+  vp9_sub_pixel_variance16x16_c(src_ptr, src_pixels_per_line,
+                                xoffset, yoffset, dst_ptr,
+                                dst_pixels_per_line, sse);
+  return *sse;
+}
+
+#if CONFIG_SUPERBLOCKS
+unsigned int vp9_sub_pixel_mse32x32_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) {
+  vp9_sub_pixel_variance32x32_c(src_ptr, src_pixels_per_line,
+                                xoffset, yoffset, dst_ptr,
+                                dst_pixels_per_line, sse);
+  return *sse;
+}
+#endif
+
+unsigned int vp9_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 = vp9_bilinear_filters[xoffset];
+  VFilter = vp9_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 vp9_variance16x8_c(temp2, 16, dst_ptr, dst_pixels_per_line, sse);
+}
+
+unsigned int vp9_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 = vp9_bilinear_filters[xoffset];
+  VFilter = vp9_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 vp9_variance8x16_c(temp2, 8, dst_ptr, dst_pixels_per_line, sse);
+}
+