| /* | |
| * 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 "filter.h" | |
| #include "./vp8_rtcd.h" | |
| DECLARE_ALIGNED(16, const short, vp8_bilinear_filters[8][2]) = | |
| { | |
| { 128, 0 }, | |
| { 112, 16 }, | |
| { 96, 32 }, | |
| { 80, 48 }, | |
| { 64, 64 }, | |
| { 48, 80 }, | |
| { 32, 96 }, | |
| { 16, 112 } | |
| }; | |
| DECLARE_ALIGNED(16, const short, vp8_sub_pel_filters[8][6]) = | |
| { | |
| { 0, 0, 128, 0, 0, 0 }, /* note that 1/8 pel positions are just as per alpha -0.5 bicubic */ | |
| { 0, -6, 123, 12, -1, 0 }, | |
| { 2, -11, 108, 36, -8, 1 }, /* New 1/4 pel 6 tap filter */ | |
| { 0, -9, 93, 50, -6, 0 }, | |
| { 3, -16, 77, 77, -16, 3 }, /* New 1/2 pel 6 tap filter */ | |
| { 0, -6, 50, 93, -9, 0 }, | |
| { 1, -8, 36, 108, -11, 2 }, /* New 1/4 pel 6 tap filter */ | |
| { 0, -1, 12, 123, -6, 0 }, | |
| }; | |
| static void filter_block2d_first_pass | |
| ( | |
| unsigned char *src_ptr, | |
| int *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++) | |
| { | |
| Temp = ((int)src_ptr[-2 * (int)pixel_step] * vp8_filter[0]) + | |
| ((int)src_ptr[-1 * (int)pixel_step] * vp8_filter[1]) + | |
| ((int)src_ptr[0] * vp8_filter[2]) + | |
| ((int)src_ptr[pixel_step] * vp8_filter[3]) + | |
| ((int)src_ptr[2*pixel_step] * vp8_filter[4]) + | |
| ((int)src_ptr[3*pixel_step] * vp8_filter[5]) + | |
| (VP8_FILTER_WEIGHT >> 1); /* Rounding */ | |
| /* Normalize back to 0-255 */ | |
| Temp = Temp >> VP8_FILTER_SHIFT; | |
| if (Temp < 0) | |
| Temp = 0; | |
| else if (Temp > 255) | |
| Temp = 255; | |
| output_ptr[j] = Temp; | |
| src_ptr++; | |
| } | |
| /* Next row... */ | |
| src_ptr += src_pixels_per_line - output_width; | |
| output_ptr += output_width; | |
| } | |
| } | |
| static void filter_block2d_second_pass | |
| ( | |
| int *src_ptr, | |
| unsigned char *output_ptr, | |
| int output_pitch, | |
| 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[-2 * (int)pixel_step] * vp8_filter[0]) + | |
| ((int)src_ptr[-1 * (int)pixel_step] * vp8_filter[1]) + | |
| ((int)src_ptr[0] * vp8_filter[2]) + | |
| ((int)src_ptr[pixel_step] * vp8_filter[3]) + | |
| ((int)src_ptr[2*pixel_step] * vp8_filter[4]) + | |
| ((int)src_ptr[3*pixel_step] * vp8_filter[5]) + | |
| (VP8_FILTER_WEIGHT >> 1); /* Rounding */ | |
| /* Normalize back to 0-255 */ | |
| Temp = Temp >> VP8_FILTER_SHIFT; | |
| if (Temp < 0) | |
| Temp = 0; | |
| else if (Temp > 255) | |
| Temp = 255; | |
| output_ptr[j] = (unsigned char)Temp; | |
| src_ptr++; | |
| } | |
| /* Start next row */ | |
| src_ptr += src_pixels_per_line - output_width; | |
| output_ptr += output_pitch; | |
| } | |
| } | |
| static void filter_block2d | |
| ( | |
| unsigned char *src_ptr, | |
| unsigned char *output_ptr, | |
| unsigned int src_pixels_per_line, | |
| int output_pitch, | |
| const short *HFilter, | |
| const short *VFilter | |
| ) | |
| { | |
| int FData[9*4]; /* Temp data buffer used in filtering */ | |
| /* First filter 1-D horizontally... */ | |
| filter_block2d_first_pass(src_ptr - (2 * src_pixels_per_line), FData, src_pixels_per_line, 1, 9, 4, HFilter); | |
| /* then filter verticaly... */ | |
| filter_block2d_second_pass(FData + 8, output_ptr, output_pitch, 4, 4, 4, 4, VFilter); | |
| } | |
| void vp8_sixtap_predict4x4_c | |
| ( | |
| 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 = vp8_sub_pel_filters[xoffset]; /* 6 tap */ | |
| VFilter = vp8_sub_pel_filters[yoffset]; /* 6 tap */ | |
| filter_block2d(src_ptr, dst_ptr, src_pixels_per_line, dst_pitch, HFilter, VFilter); | |
| } | |
| void vp8_sixtap_predict8x8_c | |
| ( | |
| 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; | |
| int FData[13*16]; /* Temp data buffer used in filtering */ | |
| HFilter = vp8_sub_pel_filters[xoffset]; /* 6 tap */ | |
| VFilter = vp8_sub_pel_filters[yoffset]; /* 6 tap */ | |
| /* First filter 1-D horizontally... */ | |
| filter_block2d_first_pass(src_ptr - (2 * src_pixels_per_line), FData, src_pixels_per_line, 1, 13, 8, HFilter); | |
| /* then filter verticaly... */ | |
| filter_block2d_second_pass(FData + 16, dst_ptr, dst_pitch, 8, 8, 8, 8, VFilter); | |
| } | |
| void vp8_sixtap_predict8x4_c | |
| ( | |
| 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; | |
| int FData[13*16]; /* Temp data buffer used in filtering */ | |
| HFilter = vp8_sub_pel_filters[xoffset]; /* 6 tap */ | |
| VFilter = vp8_sub_pel_filters[yoffset]; /* 6 tap */ | |
| /* First filter 1-D horizontally... */ | |
| filter_block2d_first_pass(src_ptr - (2 * src_pixels_per_line), FData, src_pixels_per_line, 1, 9, 8, HFilter); | |
| /* then filter verticaly... */ | |
| filter_block2d_second_pass(FData + 16, dst_ptr, dst_pitch, 8, 8, 4, 8, VFilter); | |
| } | |
| void vp8_sixtap_predict16x16_c | |
| ( | |
| 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; | |
| int FData[21*24]; /* Temp data buffer used in filtering */ | |
| HFilter = vp8_sub_pel_filters[xoffset]; /* 6 tap */ | |
| VFilter = vp8_sub_pel_filters[yoffset]; /* 6 tap */ | |
| /* First filter 1-D horizontally... */ | |
| filter_block2d_first_pass(src_ptr - (2 * src_pixels_per_line), FData, src_pixels_per_line, 1, 21, 16, HFilter); | |
| /* then filter verticaly... */ | |
| filter_block2d_second_pass(FData + 32, dst_ptr, dst_pitch, 16, 16, 16, 16, VFilter); | |
| } | |
| /**************************************************************************** | |
| * | |
| * ROUTINE : filter_block2d_bil_first_pass | |
| * | |
| * INPUTS : UINT8 *src_ptr : Pointer to source block. | |
| * UINT32 src_stride : Stride of source block. | |
| * UINT32 height : Block height. | |
| * UINT32 width : Block width. | |
| * INT32 *vp8_filter : Array of 2 bi-linear filter taps. | |
| * | |
| * OUTPUTS : INT32 *dst_ptr : Pointer to filtered block. | |
| * | |
| * RETURNS : void | |
| * | |
| * FUNCTION : Applies a 1-D 2-tap bi-linear filter to the source block | |
| * in the horizontal 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. | |
| * | |
| ****************************************************************************/ | |
| static void filter_block2d_bil_first_pass | |
| ( | |
| unsigned char *src_ptr, | |
| unsigned short *dst_ptr, | |
| unsigned int src_stride, | |
| unsigned int height, | |
| unsigned int width, | |
| const short *vp8_filter | |
| ) | |
| { | |
| unsigned int i, j; | |
| for (i = 0; i < height; i++) | |
| { | |
| for (j = 0; j < width; j++) | |
| { | |
| /* Apply bilinear filter */ | |
| dst_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_stride - width; | |
| dst_ptr += width; | |
| } | |
| } | |
| /**************************************************************************** | |
| * | |
| * ROUTINE : filter_block2d_bil_second_pass | |
| * | |
| * INPUTS : INT32 *src_ptr : Pointer to source block. | |
| * UINT32 dst_pitch : Destination block pitch. | |
| * UINT32 height : Block height. | |
| * UINT32 width : Block width. | |
| * INT32 *vp8_filter : Array of 2 bi-linear filter taps. | |
| * | |
| * OUTPUTS : UINT16 *dst_ptr : Pointer to filtered block. | |
| * | |
| * RETURNS : void | |
| * | |
| * FUNCTION : Applies a 1-D 2-tap bi-linear filter to the source block | |
| * in the 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. | |
| * | |
| ****************************************************************************/ | |
| static void filter_block2d_bil_second_pass | |
| ( | |
| unsigned short *src_ptr, | |
| unsigned char *dst_ptr, | |
| int dst_pitch, | |
| unsigned int height, | |
| unsigned int width, | |
| const short *vp8_filter | |
| ) | |
| { | |
| unsigned int i, j; | |
| int Temp; | |
| for (i = 0; i < height; i++) | |
| { | |
| for (j = 0; j < width; j++) | |
| { | |
| /* Apply filter */ | |
| Temp = ((int)src_ptr[0] * vp8_filter[0]) + | |
| ((int)src_ptr[width] * vp8_filter[1]) + | |
| (VP8_FILTER_WEIGHT / 2); | |
| dst_ptr[j] = (unsigned int)(Temp >> VP8_FILTER_SHIFT); | |
| src_ptr++; | |
| } | |
| /* Next row... */ | |
| dst_ptr += dst_pitch; | |
| } | |
| } | |
| /**************************************************************************** | |
| * | |
| * ROUTINE : filter_block2d_bil | |
| * | |
| * INPUTS : UINT8 *src_ptr : Pointer to source block. | |
| * UINT32 src_pitch : Stride of source block. | |
| * UINT32 dst_pitch : Stride of destination block. | |
| * INT32 *HFilter : Array of 2 horizontal filter taps. | |
| * INT32 *VFilter : Array of 2 vertical filter taps. | |
| * INT32 Width : Block width | |
| * INT32 Height : Block height | |
| * | |
| * OUTPUTS : UINT16 *dst_ptr : Pointer to filtered block. | |
| * | |
| * RETURNS : void | |
| * | |
| * FUNCTION : 2-D filters an input block by applying a 2-tap | |
| * bi-linear filter horizontally followed by a 2-tap | |
| * bi-linear filter vertically on the result. | |
| * | |
| * SPECIAL NOTES : The largest block size can be handled here is 16x16 | |
| * | |
| ****************************************************************************/ | |
| static void filter_block2d_bil | |
| ( | |
| unsigned char *src_ptr, | |
| unsigned char *dst_ptr, | |
| unsigned int src_pitch, | |
| unsigned int dst_pitch, | |
| const short *HFilter, | |
| const short *VFilter, | |
| int Width, | |
| int Height | |
| ) | |
| { | |
| unsigned short FData[17*16]; /* Temp data buffer used in filtering */ | |
| /* First filter 1-D horizontally... */ | |
| filter_block2d_bil_first_pass(src_ptr, FData, src_pitch, Height + 1, Width, HFilter); | |
| /* then 1-D vertically... */ | |
| filter_block2d_bil_second_pass(FData, dst_ptr, dst_pitch, Height, Width, VFilter); | |
| } | |
| void vp8_bilinear_predict4x4_c | |
| ( | |
| 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 = vp8_bilinear_filters[xoffset]; | |
| VFilter = vp8_bilinear_filters[yoffset]; | |
| #if 0 | |
| { | |
| int i; | |
| unsigned char temp1[16]; | |
| unsigned char temp2[16]; | |
| bilinear_predict4x4_mmx(src_ptr, src_pixels_per_line, xoffset, yoffset, temp1, 4); | |
| filter_block2d_bil(src_ptr, temp2, src_pixels_per_line, 4, HFilter, VFilter, 4, 4); | |
| for (i = 0; i < 16; i++) | |
| { | |
| if (temp1[i] != temp2[i]) | |
| { | |
| bilinear_predict4x4_mmx(src_ptr, src_pixels_per_line, xoffset, yoffset, temp1, 4); | |
| filter_block2d_bil(src_ptr, temp2, src_pixels_per_line, 4, HFilter, VFilter, 4, 4); | |
| } | |
| } | |
| } | |
| #endif | |
| filter_block2d_bil(src_ptr, dst_ptr, src_pixels_per_line, dst_pitch, HFilter, VFilter, 4, 4); | |
| } | |
| void vp8_bilinear_predict8x8_c | |
| ( | |
| 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 = vp8_bilinear_filters[xoffset]; | |
| VFilter = vp8_bilinear_filters[yoffset]; | |
| filter_block2d_bil(src_ptr, dst_ptr, src_pixels_per_line, dst_pitch, HFilter, VFilter, 8, 8); | |
| } | |
| void vp8_bilinear_predict8x4_c | |
| ( | |
| 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 = vp8_bilinear_filters[xoffset]; | |
| VFilter = vp8_bilinear_filters[yoffset]; | |
| filter_block2d_bil(src_ptr, dst_ptr, src_pixels_per_line, dst_pitch, HFilter, VFilter, 8, 4); | |
| } | |
| void vp8_bilinear_predict16x16_c | |
| ( | |
| 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 = vp8_bilinear_filters[xoffset]; | |
| VFilter = vp8_bilinear_filters[yoffset]; | |
| filter_block2d_bil(src_ptr, dst_ptr, src_pixels_per_line, dst_pitch, HFilter, VFilter, 16, 16); | |
| } |