diff options
Diffstat (limited to 'chromium/third_party/libvpx/source/libvpx/vp8/common/variance_c.c')
| -rw-r--r-- | chromium/third_party/libvpx/source/libvpx/vp8/common/variance_c.c | 337 |
1 files changed, 0 insertions, 337 deletions
diff --git a/chromium/third_party/libvpx/source/libvpx/vp8/common/variance_c.c b/chromium/third_party/libvpx/source/libvpx/vp8/common/variance_c.c deleted file mode 100644 index 02915a4defd..00000000000 --- a/chromium/third_party/libvpx/source/libvpx/vp8/common/variance_c.c +++ /dev/null @@ -1,337 +0,0 @@ -/* - * 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); -} |