ref: 4fbd0227f5a22183f880fcf0cf93f3799c65c37b
dir: /vp8/common/arm/bilinearfilter_arm.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 <math.h> #include "subpixel.h" #define BLOCK_HEIGHT_WIDTH 4 #define VP8_FILTER_WEIGHT 128 #define VP8_FILTER_SHIFT 7 static const short bilinear_filters[8][2] = { { 128, 0 }, { 112, 16 }, { 96, 32 }, { 80, 48 }, { 64, 64 }, { 48, 80 }, { 32, 96 }, { 16, 112 } }; extern void vp8_filter_block2d_bil_first_pass_armv6 ( unsigned char *src_ptr, unsigned short *output_ptr, unsigned int src_pixels_per_line, unsigned int output_height, unsigned int output_width, const short *vp8_filter ); extern void vp8_filter_block2d_bil_second_pass_armv6 ( unsigned short *src_ptr, unsigned char *output_ptr, int output_pitch, unsigned int output_height, unsigned int output_width, const short *vp8_filter ); #if 0 void vp8_filter_block2d_bil_first_pass_6 ( unsigned char *src_ptr, unsigned short *output_ptr, unsigned int src_pixels_per_line, 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[1] * 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; } } void vp8_filter_block2d_bil_second_pass_6 ( unsigned short *src_ptr, unsigned char *output_ptr, int output_pitch, 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[output_width] * 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_pitch; } } #endif void vp8_filter_block2d_bil_armv6 ( unsigned char *src_ptr, unsigned char *output_ptr, unsigned int src_pixels_per_line, unsigned int dst_pitch, const short *HFilter, const short *VFilter, int Width, int Height ) { unsigned short FData[36*16]; /* Temp data bufffer used in filtering */ /* First filter 1-D horizontally... */ /* pixel_step = 1; */ vp8_filter_block2d_bil_first_pass_armv6(src_ptr, FData, src_pixels_per_line, Height + 1, Width, HFilter); /* then 1-D vertically... */ vp8_filter_block2d_bil_second_pass_armv6(FData, output_ptr, dst_pitch, Height, Width, VFilter); } void vp8_bilinear_predict4x4_armv6 ( unsigned char *src_ptr, int src_pixels_per_line, int xoffset, int yoffset, unsigned char *dst_ptr, int dst_pitch ) { const short *HFilter; const short *VFilter; HFilter = bilinear_filters[xoffset]; VFilter = bilinear_filters[yoffset]; vp8_filter_block2d_bil_armv6(src_ptr, dst_ptr, src_pixels_per_line, dst_pitch, HFilter, VFilter, 4, 4); } void vp8_bilinear_predict8x8_armv6 ( unsigned char *src_ptr, int src_pixels_per_line, int xoffset, int yoffset, unsigned char *dst_ptr, int dst_pitch ) { const short *HFilter; const short *VFilter; HFilter = bilinear_filters[xoffset]; VFilter = bilinear_filters[yoffset]; vp8_filter_block2d_bil_armv6(src_ptr, dst_ptr, src_pixels_per_line, dst_pitch, HFilter, VFilter, 8, 8); } void vp8_bilinear_predict8x4_armv6 ( unsigned char *src_ptr, int src_pixels_per_line, int xoffset, int yoffset, unsigned char *dst_ptr, int dst_pitch ) { const short *HFilter; const short *VFilter; HFilter = bilinear_filters[xoffset]; VFilter = bilinear_filters[yoffset]; vp8_filter_block2d_bil_armv6(src_ptr, dst_ptr, src_pixels_per_line, dst_pitch, HFilter, VFilter, 8, 4); } void vp8_bilinear_predict16x16_armv6 ( unsigned char *src_ptr, int src_pixels_per_line, int xoffset, int yoffset, unsigned char *dst_ptr, int dst_pitch ) { const short *HFilter; const short *VFilter; HFilter = bilinear_filters[xoffset]; VFilter = bilinear_filters[yoffset]; vp8_filter_block2d_bil_armv6(src_ptr, dst_ptr, src_pixels_per_line, dst_pitch, HFilter, VFilter, 16, 16); }