dcab9896e8
The declaration of the bilinear filters specified an alignment clause in the implementation file but not in the header. This turned out to be harmless, but it did cause linker warnings to be emitted when building on Windows. The (extern) declaration in the header was changed, to match the declaration in the implementation. Change-Id: I44be89b1572fe9a50fa47a42e4db9128c4897b04
493 lines
14 KiB
C
493 lines
14 KiB
C
/*
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* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "filter.h"
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DECLARE_ALIGNED(16, const short, vp8_bilinear_filters[8][2]) =
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{
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{ 128, 0 },
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{ 112, 16 },
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{ 96, 32 },
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{ 80, 48 },
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{ 64, 64 },
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{ 48, 80 },
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{ 32, 96 },
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{ 16, 112 }
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};
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DECLARE_ALIGNED(16, const short, vp8_sub_pel_filters[8][6]) =
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{
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{ 0, 0, 128, 0, 0, 0 }, /* note that 1/8 pel positions are just as per alpha -0.5 bicubic */
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{ 0, -6, 123, 12, -1, 0 },
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{ 2, -11, 108, 36, -8, 1 }, /* New 1/4 pel 6 tap filter */
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{ 0, -9, 93, 50, -6, 0 },
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{ 3, -16, 77, 77, -16, 3 }, /* New 1/2 pel 6 tap filter */
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{ 0, -6, 50, 93, -9, 0 },
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{ 1, -8, 36, 108, -11, 2 }, /* New 1/4 pel 6 tap filter */
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{ 0, -1, 12, 123, -6, 0 },
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};
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static void filter_block2d_first_pass
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(
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unsigned char *src_ptr,
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int *output_ptr,
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unsigned int src_pixels_per_line,
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unsigned int pixel_step,
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unsigned int output_height,
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unsigned int output_width,
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const short *vp8_filter
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)
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{
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unsigned int i, j;
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int Temp;
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for (i = 0; i < output_height; i++)
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{
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for (j = 0; j < output_width; j++)
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{
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Temp = ((int)src_ptr[-2 * (int)pixel_step] * vp8_filter[0]) +
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((int)src_ptr[-1 * (int)pixel_step] * vp8_filter[1]) +
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((int)src_ptr[0] * vp8_filter[2]) +
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((int)src_ptr[pixel_step] * vp8_filter[3]) +
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((int)src_ptr[2*pixel_step] * vp8_filter[4]) +
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((int)src_ptr[3*pixel_step] * vp8_filter[5]) +
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(VP8_FILTER_WEIGHT >> 1); /* Rounding */
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/* Normalize back to 0-255 */
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Temp = Temp >> VP8_FILTER_SHIFT;
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if (Temp < 0)
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Temp = 0;
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else if (Temp > 255)
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Temp = 255;
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output_ptr[j] = Temp;
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src_ptr++;
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}
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/* Next row... */
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src_ptr += src_pixels_per_line - output_width;
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output_ptr += output_width;
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}
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}
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static void filter_block2d_second_pass
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(
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int *src_ptr,
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unsigned char *output_ptr,
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int output_pitch,
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unsigned int src_pixels_per_line,
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unsigned int pixel_step,
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unsigned int output_height,
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unsigned int output_width,
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const short *vp8_filter
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)
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{
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unsigned int i, j;
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int Temp;
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for (i = 0; i < output_height; i++)
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{
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for (j = 0; j < output_width; j++)
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{
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/* Apply filter */
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Temp = ((int)src_ptr[-2 * (int)pixel_step] * vp8_filter[0]) +
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((int)src_ptr[-1 * (int)pixel_step] * vp8_filter[1]) +
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((int)src_ptr[0] * vp8_filter[2]) +
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((int)src_ptr[pixel_step] * vp8_filter[3]) +
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((int)src_ptr[2*pixel_step] * vp8_filter[4]) +
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((int)src_ptr[3*pixel_step] * vp8_filter[5]) +
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(VP8_FILTER_WEIGHT >> 1); /* Rounding */
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/* Normalize back to 0-255 */
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Temp = Temp >> VP8_FILTER_SHIFT;
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if (Temp < 0)
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Temp = 0;
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else if (Temp > 255)
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Temp = 255;
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output_ptr[j] = (unsigned char)Temp;
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src_ptr++;
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}
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/* Start next row */
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src_ptr += src_pixels_per_line - output_width;
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output_ptr += output_pitch;
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}
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}
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static void filter_block2d
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(
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unsigned char *src_ptr,
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unsigned char *output_ptr,
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unsigned int src_pixels_per_line,
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int output_pitch,
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const short *HFilter,
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const short *VFilter
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)
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{
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int FData[9*4]; /* Temp data buffer used in filtering */
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/* First filter 1-D horizontally... */
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filter_block2d_first_pass(src_ptr - (2 * src_pixels_per_line), FData, src_pixels_per_line, 1, 9, 4, HFilter);
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/* then filter verticaly... */
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filter_block2d_second_pass(FData + 8, output_ptr, output_pitch, 4, 4, 4, 4, VFilter);
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}
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void vp8_sixtap_predict4x4_c
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(
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unsigned char *src_ptr,
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int src_pixels_per_line,
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int xoffset,
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int yoffset,
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unsigned char *dst_ptr,
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int dst_pitch
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)
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{
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const short *HFilter;
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const short *VFilter;
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HFilter = vp8_sub_pel_filters[xoffset]; /* 6 tap */
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VFilter = vp8_sub_pel_filters[yoffset]; /* 6 tap */
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filter_block2d(src_ptr, dst_ptr, src_pixels_per_line, dst_pitch, HFilter, VFilter);
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}
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void vp8_sixtap_predict8x8_c
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(
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unsigned char *src_ptr,
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int src_pixels_per_line,
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int xoffset,
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int yoffset,
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unsigned char *dst_ptr,
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int dst_pitch
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)
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{
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const short *HFilter;
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const short *VFilter;
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int FData[13*16]; /* Temp data buffer used in filtering */
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HFilter = vp8_sub_pel_filters[xoffset]; /* 6 tap */
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VFilter = vp8_sub_pel_filters[yoffset]; /* 6 tap */
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/* First filter 1-D horizontally... */
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filter_block2d_first_pass(src_ptr - (2 * src_pixels_per_line), FData, src_pixels_per_line, 1, 13, 8, HFilter);
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/* then filter verticaly... */
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filter_block2d_second_pass(FData + 16, dst_ptr, dst_pitch, 8, 8, 8, 8, VFilter);
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}
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void vp8_sixtap_predict8x4_c
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(
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unsigned char *src_ptr,
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int src_pixels_per_line,
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int xoffset,
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int yoffset,
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unsigned char *dst_ptr,
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int dst_pitch
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)
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{
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const short *HFilter;
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const short *VFilter;
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int FData[13*16]; /* Temp data buffer used in filtering */
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HFilter = vp8_sub_pel_filters[xoffset]; /* 6 tap */
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VFilter = vp8_sub_pel_filters[yoffset]; /* 6 tap */
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/* First filter 1-D horizontally... */
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filter_block2d_first_pass(src_ptr - (2 * src_pixels_per_line), FData, src_pixels_per_line, 1, 9, 8, HFilter);
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/* then filter verticaly... */
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filter_block2d_second_pass(FData + 16, dst_ptr, dst_pitch, 8, 8, 4, 8, VFilter);
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}
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void vp8_sixtap_predict16x16_c
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(
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unsigned char *src_ptr,
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int src_pixels_per_line,
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int xoffset,
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int yoffset,
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unsigned char *dst_ptr,
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int dst_pitch
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)
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{
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const short *HFilter;
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const short *VFilter;
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int FData[21*24]; /* Temp data buffer used in filtering */
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HFilter = vp8_sub_pel_filters[xoffset]; /* 6 tap */
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VFilter = vp8_sub_pel_filters[yoffset]; /* 6 tap */
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/* First filter 1-D horizontally... */
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filter_block2d_first_pass(src_ptr - (2 * src_pixels_per_line), FData, src_pixels_per_line, 1, 21, 16, HFilter);
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/* then filter verticaly... */
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filter_block2d_second_pass(FData + 32, dst_ptr, dst_pitch, 16, 16, 16, 16, VFilter);
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}
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/****************************************************************************
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*
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* ROUTINE : filter_block2d_bil_first_pass
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*
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* INPUTS : UINT8 *src_ptr : Pointer to source block.
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* UINT32 src_stride : Stride of source block.
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* UINT32 height : Block height.
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* UINT32 width : Block width.
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* INT32 *vp8_filter : Array of 2 bi-linear filter taps.
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*
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* OUTPUTS : INT32 *dst_ptr : Pointer to filtered block.
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*
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* RETURNS : void
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*
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* FUNCTION : Applies a 1-D 2-tap bi-linear filter to the source block
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* in the horizontal direction to produce the filtered output
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* block. Used to implement first-pass of 2-D separable filter.
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*
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* SPECIAL NOTES : Produces INT32 output to retain precision for next pass.
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* Two filter taps should sum to VP8_FILTER_WEIGHT.
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*
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****************************************************************************/
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static void filter_block2d_bil_first_pass
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(
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unsigned char *src_ptr,
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unsigned short *dst_ptr,
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unsigned int src_stride,
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unsigned int height,
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unsigned int width,
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const short *vp8_filter
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)
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{
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unsigned int i, j;
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for (i = 0; i < height; i++)
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{
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for (j = 0; j < width; j++)
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{
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/* Apply bilinear filter */
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dst_ptr[j] = (((int)src_ptr[0] * vp8_filter[0]) +
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((int)src_ptr[1] * vp8_filter[1]) +
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(VP8_FILTER_WEIGHT / 2)) >> VP8_FILTER_SHIFT;
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src_ptr++;
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}
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/* Next row... */
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src_ptr += src_stride - width;
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dst_ptr += width;
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}
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}
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/****************************************************************************
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*
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* ROUTINE : filter_block2d_bil_second_pass
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*
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* INPUTS : INT32 *src_ptr : Pointer to source block.
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* UINT32 dst_pitch : Destination block pitch.
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* UINT32 height : Block height.
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* UINT32 width : Block width.
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* INT32 *vp8_filter : Array of 2 bi-linear filter taps.
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*
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* OUTPUTS : UINT16 *dst_ptr : Pointer to filtered block.
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*
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* RETURNS : void
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*
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* FUNCTION : Applies a 1-D 2-tap bi-linear filter to the source block
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* in the vertical direction to produce the filtered output
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* block. Used to implement second-pass of 2-D separable filter.
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*
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* SPECIAL NOTES : Requires 32-bit input as produced by filter_block2d_bil_first_pass.
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* Two filter taps should sum to VP8_FILTER_WEIGHT.
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*
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****************************************************************************/
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static void filter_block2d_bil_second_pass
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(
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unsigned short *src_ptr,
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unsigned char *dst_ptr,
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int dst_pitch,
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unsigned int height,
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unsigned int width,
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const short *vp8_filter
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)
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{
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unsigned int i, j;
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int Temp;
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for (i = 0; i < height; i++)
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{
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for (j = 0; j < width; j++)
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{
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/* Apply filter */
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Temp = ((int)src_ptr[0] * vp8_filter[0]) +
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((int)src_ptr[width] * vp8_filter[1]) +
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(VP8_FILTER_WEIGHT / 2);
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dst_ptr[j] = (unsigned int)(Temp >> VP8_FILTER_SHIFT);
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src_ptr++;
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}
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/* Next row... */
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dst_ptr += dst_pitch;
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}
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}
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/****************************************************************************
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*
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* ROUTINE : filter_block2d_bil
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*
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* INPUTS : UINT8 *src_ptr : Pointer to source block.
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* UINT32 src_pitch : Stride of source block.
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* UINT32 dst_pitch : Stride of destination block.
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* INT32 *HFilter : Array of 2 horizontal filter taps.
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* INT32 *VFilter : Array of 2 vertical filter taps.
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* INT32 Width : Block width
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* INT32 Height : Block height
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*
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* OUTPUTS : UINT16 *dst_ptr : Pointer to filtered block.
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*
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* RETURNS : void
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*
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* FUNCTION : 2-D filters an input block by applying a 2-tap
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* bi-linear filter horizontally followed by a 2-tap
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* bi-linear filter vertically on the result.
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*
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* SPECIAL NOTES : The largest block size can be handled here is 16x16
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*
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****************************************************************************/
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static void filter_block2d_bil
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(
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unsigned char *src_ptr,
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unsigned char *dst_ptr,
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unsigned int src_pitch,
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unsigned int dst_pitch,
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const short *HFilter,
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const short *VFilter,
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int Width,
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int Height
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)
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{
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unsigned short FData[17*16]; /* Temp data buffer used in filtering */
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/* First filter 1-D horizontally... */
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filter_block2d_bil_first_pass(src_ptr, FData, src_pitch, Height + 1, Width, HFilter);
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/* then 1-D vertically... */
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filter_block2d_bil_second_pass(FData, dst_ptr, dst_pitch, Height, Width, VFilter);
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}
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void vp8_bilinear_predict4x4_c
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(
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unsigned char *src_ptr,
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int src_pixels_per_line,
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int xoffset,
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int yoffset,
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unsigned char *dst_ptr,
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int dst_pitch
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)
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{
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const short *HFilter;
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const short *VFilter;
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HFilter = vp8_bilinear_filters[xoffset];
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VFilter = vp8_bilinear_filters[yoffset];
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#if 0
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{
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int i;
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unsigned char temp1[16];
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unsigned char temp2[16];
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bilinear_predict4x4_mmx(src_ptr, src_pixels_per_line, xoffset, yoffset, temp1, 4);
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filter_block2d_bil(src_ptr, temp2, src_pixels_per_line, 4, HFilter, VFilter, 4, 4);
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for (i = 0; i < 16; i++)
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{
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if (temp1[i] != temp2[i])
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{
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bilinear_predict4x4_mmx(src_ptr, src_pixels_per_line, xoffset, yoffset, temp1, 4);
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filter_block2d_bil(src_ptr, temp2, src_pixels_per_line, 4, HFilter, VFilter, 4, 4);
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}
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}
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}
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#endif
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filter_block2d_bil(src_ptr, dst_ptr, src_pixels_per_line, dst_pitch, HFilter, VFilter, 4, 4);
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}
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void vp8_bilinear_predict8x8_c
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(
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unsigned char *src_ptr,
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int src_pixels_per_line,
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int xoffset,
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int yoffset,
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unsigned char *dst_ptr,
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int dst_pitch
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)
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{
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const short *HFilter;
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const short *VFilter;
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HFilter = vp8_bilinear_filters[xoffset];
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VFilter = vp8_bilinear_filters[yoffset];
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filter_block2d_bil(src_ptr, dst_ptr, src_pixels_per_line, dst_pitch, HFilter, VFilter, 8, 8);
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}
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void vp8_bilinear_predict8x4_c
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(
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unsigned char *src_ptr,
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int src_pixels_per_line,
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int xoffset,
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int yoffset,
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unsigned char *dst_ptr,
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int dst_pitch
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)
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{
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const short *HFilter;
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const short *VFilter;
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HFilter = vp8_bilinear_filters[xoffset];
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VFilter = vp8_bilinear_filters[yoffset];
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filter_block2d_bil(src_ptr, dst_ptr, src_pixels_per_line, dst_pitch, HFilter, VFilter, 8, 4);
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}
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void vp8_bilinear_predict16x16_c
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(
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unsigned char *src_ptr,
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int src_pixels_per_line,
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int xoffset,
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int yoffset,
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unsigned char *dst_ptr,
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int dst_pitch
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)
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{
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const short *HFilter;
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const short *VFilter;
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HFilter = vp8_bilinear_filters[xoffset];
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VFilter = vp8_bilinear_filters[yoffset];
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filter_block2d_bil(src_ptr, dst_ptr, src_pixels_per_line, dst_pitch, HFilter, VFilter, 16, 16);
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}
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