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Unified Diff: source/libvpx/vp9/common/vp9_filter.c

Issue 11555023: libvpx: Add VP9 decoder. (Closed) Base URL: svn://chrome-svn/chrome/trunk/deps/third_party/libvpx/
Patch Set: Created 8 years ago
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Index: source/libvpx/vp9/common/vp9_filter.c
===================================================================
--- source/libvpx/vp9/common/vp9_filter.c (revision 0)
+++ source/libvpx/vp9/common/vp9_filter.c (revision 0)
@@ -0,0 +1,1159 @@
+/*
+ * 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 <stdlib.h>
+#include "vp9/common/vp9_filter.h"
+#include "vpx_ports/mem.h"
+#include "vp9_rtcd.h"
+
+DECLARE_ALIGNED(16, const short, vp9_bilinear_filters[SUBPEL_SHIFTS][2]) = {
+ { 128, 0 },
+ { 120, 8 },
+ { 112, 16 },
+ { 104, 24 },
+ { 96, 32 },
+ { 88, 40 },
+ { 80, 48 },
+ { 72, 56 },
+ { 64, 64 },
+ { 56, 72 },
+ { 48, 80 },
+ { 40, 88 },
+ { 32, 96 },
+ { 24, 104 },
+ { 16, 112 },
+ { 8, 120 }
+};
+
+#define FILTER_ALPHA 0
+#define FILTER_ALPHA_SHARP 1
+DECLARE_ALIGNED(16, const short, vp9_sub_pel_filters_8[SUBPEL_SHIFTS][8]) = {
+#if FILTER_ALPHA == 0
+ /* Lagrangian interpolation filter */
+ { 0, 0, 0, 128, 0, 0, 0, 0},
+ { 0, 1, -5, 126, 8, -3, 1, 0},
+ { -1, 3, -10, 122, 18, -6, 2, 0},
+ { -1, 4, -13, 118, 27, -9, 3, -1},
+ { -1, 4, -16, 112, 37, -11, 4, -1},
+ { -1, 5, -18, 105, 48, -14, 4, -1},
+ { -1, 5, -19, 97, 58, -16, 5, -1},
+ { -1, 6, -19, 88, 68, -18, 5, -1},
+ { -1, 6, -19, 78, 78, -19, 6, -1},
+ { -1, 5, -18, 68, 88, -19, 6, -1},
+ { -1, 5, -16, 58, 97, -19, 5, -1},
+ { -1, 4, -14, 48, 105, -18, 5, -1},
+ { -1, 4, -11, 37, 112, -16, 4, -1},
+ { -1, 3, -9, 27, 118, -13, 4, -1},
+ { 0, 2, -6, 18, 122, -10, 3, -1},
+ { 0, 1, -3, 8, 126, -5, 1, 0}
+#elif FILTER_ALPHA == 50
+ /* Generated using MATLAB:
+ * alpha = 0.5;
+ * b=intfilt(8,4,alpha);
+ * bi=round(128*b);
+ * ba=flipud(reshape([bi 0], 8, 8));
+ * disp(num2str(ba, '%d,'))
+ */
+ { 0, 0, 0, 128, 0, 0, 0, 0},
+ { 0, 1, -5, 126, 8, -3, 1, 0},
+ { 0, 2, -10, 122, 18, -6, 2, 0},
+ { -1, 3, -13, 118, 27, -9, 3, 0},
+ { -1, 4, -16, 112, 37, -11, 3, 0},
+ { -1, 5, -17, 104, 48, -14, 4, -1},
+ { -1, 5, -18, 96, 58, -16, 5, -1},
+ { -1, 5, -19, 88, 68, -17, 5, -1},
+ { -1, 5, -18, 78, 78, -18, 5, -1},
+ { -1, 5, -17, 68, 88, -19, 5, -1},
+ { -1, 5, -16, 58, 96, -18, 5, -1},
+ { -1, 4, -14, 48, 104, -17, 5, -1},
+ { 0, 3, -11, 37, 112, -16, 4, -1},
+ { 0, 3, -9, 27, 118, -13, 3, -1},
+ { 0, 2, -6, 18, 122, -10, 2, 0},
+ { 0, 1, -3, 8, 126, -5, 1, 0}
+#endif /* FILTER_ALPHA */
+};
+
+DECLARE_ALIGNED(16, const short, vp9_sub_pel_filters_8s[SUBPEL_SHIFTS][8]) = {
+#if FILTER_ALPHA_SHARP == 1
+ /* dct based filter */
+ {0, 0, 0, 128, 0, 0, 0, 0},
+ {-1, 3, -7, 127, 8, -3, 1, 0},
+ {-2, 5, -13, 125, 17, -6, 3, -1},
+ {-3, 7, -17, 121, 27, -10, 5, -2},
+ {-4, 9, -20, 115, 37, -13, 6, -2},
+ {-4, 10, -23, 108, 48, -16, 8, -3},
+ {-4, 10, -24, 100, 59, -19, 9, -3},
+ {-4, 11, -24, 90, 70, -21, 10, -4},
+ {-4, 11, -23, 80, 80, -23, 11, -4},
+ {-4, 10, -21, 70, 90, -24, 11, -4},
+ {-3, 9, -19, 59, 100, -24, 10, -4},
+ {-3, 8, -16, 48, 108, -23, 10, -4},
+ {-2, 6, -13, 37, 115, -20, 9, -4},
+ {-2, 5, -10, 27, 121, -17, 7, -3},
+ {-1, 3, -6, 17, 125, -13, 5, -2},
+ {0, 1, -3, 8, 127, -7, 3, -1}
+#elif FILTER_ALPHA_SHARP == 75
+ /* alpha = 0.75 */
+ {0, 0, 0, 128, 0, 0, 0, 0},
+ {-1, 2, -6, 126, 9, -3, 2, -1},
+ {-1, 4, -11, 123, 18, -7, 3, -1},
+ {-2, 6, -16, 119, 28, -10, 5, -2},
+ {-2, 7, -19, 113, 38, -13, 6, -2},
+ {-3, 8, -21, 106, 49, -16, 7, -2},
+ {-3, 9, -22, 99, 59, -19, 8, -3},
+ {-3, 9, -23, 90, 70, -21, 9, -3},
+ {-3, 9, -22, 80, 80, -22, 9, -3},
+ {-3, 9, -21, 70, 90, -23, 9, -3},
+ {-3, 8, -19, 59, 99, -22, 9, -3},
+ {-2, 7, -16, 49, 106, -21, 8, -3},
+ {-2, 6, -13, 38, 113, -19, 7, -2},
+ {-2, 5, -10, 28, 119, -16, 6, -2},
+ {-1, 3, -7, 18, 123, -11, 4, -1},
+ {-1, 2, -3, 9, 126, -6, 2, -1}
+#endif /* FILTER_ALPHA_SHARP */
+};
+
+DECLARE_ALIGNED(16, const short, vp9_sub_pel_filters_6[SUBPEL_SHIFTS][6]) = {
+ {0, 0, 128, 0, 0, 0},
+ {1, -5, 125, 8, -2, 1},
+ {1, -8, 122, 17, -5, 1},
+ {2, -11, 116, 27, -8, 2},
+ {3, -14, 110, 37, -10, 2},
+ {3, -15, 103, 47, -12, 2},
+ {3, -16, 95, 57, -14, 3},
+ {3, -16, 86, 67, -15, 3},
+ {3, -16, 77, 77, -16, 3},
+ {3, -15, 67, 86, -16, 3},
+ {3, -14, 57, 95, -16, 3},
+ {2, -12, 47, 103, -15, 3},
+ {2, -10, 37, 110, -14, 3},
+ {2, -8, 27, 116, -11, 2},
+ {1, -5, 17, 122, -8, 1},
+ {1, -2, 8, 125, -5, 1}
+};
+
+static void filter_block2d_first_pass_6(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 *vp9_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] * vp9_filter[0]) +
+ ((int)src_ptr[-1 * (int)pixel_step] * vp9_filter[1]) +
+ ((int)src_ptr[0] * vp9_filter[2]) +
+ ((int)src_ptr[pixel_step] * vp9_filter[3]) +
+ ((int)src_ptr[2 * pixel_step] * vp9_filter[4]) +
+ ((int)src_ptr[3 * pixel_step] * vp9_filter[5]) +
+ (VP9_FILTER_WEIGHT >> 1); /* Rounding */
+
+ /* Normalize back to 0-255 */
+ Temp = Temp >> VP9_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_6(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 *vp9_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] * vp9_filter[0]) +
+ ((int)src_ptr[-1 * (int)pixel_step] * vp9_filter[1]) +
+ ((int)src_ptr[0] * vp9_filter[2]) +
+ ((int)src_ptr[pixel_step] * vp9_filter[3]) +
+ ((int)src_ptr[2 * pixel_step] * vp9_filter[4]) +
+ ((int)src_ptr[3 * pixel_step] * vp9_filter[5]) +
+ (VP9_FILTER_WEIGHT >> 1); /* Rounding */
+
+ /* Normalize back to 0-255 */
+ Temp = Temp >> VP9_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;
+ }
+}
+
+/*
+ * The only functional difference between filter_block2d_second_pass()
+ * and this function is that filter_block2d_second_pass() does a sixtap
+ * filter on the input and stores it in the output. This function
+ * (filter_block2d_second_pass_avg()) does a sixtap filter on the input,
+ * and then averages that with the content already present in the output
+ * ((filter_result + dest + 1) >> 1) and stores that in the output.
+ */
+static void filter_block2d_second_pass_avg_6(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 *vp9_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] * vp9_filter[0]) +
+ ((int)src_ptr[-1 * (int)pixel_step] * vp9_filter[1]) +
+ ((int)src_ptr[0] * vp9_filter[2]) +
+ ((int)src_ptr[pixel_step] * vp9_filter[3]) +
+ ((int)src_ptr[2 * pixel_step] * vp9_filter[4]) +
+ ((int)src_ptr[3 * pixel_step] * vp9_filter[5]) +
+ (VP9_FILTER_WEIGHT >> 1); /* Rounding */
+
+ /* Normalize back to 0-255 */
+ Temp = Temp >> VP9_FILTER_SHIFT;
+
+ if (Temp < 0)
+ Temp = 0;
+ else if (Temp > 255)
+ Temp = 255;
+
+ output_ptr[j] = (unsigned char)((output_ptr[j] + Temp + 1) >> 1);
+ src_ptr++;
+ }
+
+ /* Start next row */
+ src_ptr += src_pixels_per_line - output_width;
+ output_ptr += output_pitch;
+ }
+}
+
+#define Interp_Extend 3
+static void filter_block2d_6(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[(3 + Interp_Extend * 2) * 4]; /* Temp data buffer used in filtering */
+
+ /* First filter 1-D horizontally... */
+ filter_block2d_first_pass_6(src_ptr - ((Interp_Extend - 1) * src_pixels_per_line), FData, src_pixels_per_line, 1,
+ 3 + Interp_Extend * 2, 4, HFilter);
+
+ /* then filter verticaly... */
+ filter_block2d_second_pass_6(FData + 4 * (Interp_Extend - 1), output_ptr, output_pitch, 4, 4, 4, 4, VFilter);
+}
+
+
+void vp9_sixtap_predict_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 = vp9_sub_pel_filters_6[xoffset]; /* 6 tap */
+ VFilter = vp9_sub_pel_filters_6[yoffset]; /* 6 tap */
+
+ filter_block2d_6(src_ptr, dst_ptr, src_pixels_per_line, dst_pitch, HFilter, VFilter);
+}
+
+/*
+ * The difference between filter_block2d_6() and filter_block2d_avg_6 is
+ * that filter_block2d_6() does a 6-tap filter and stores it in the output
+ * buffer, whereas filter_block2d_avg_6() does the same 6-tap filter, and
+ * then averages that with the content already present in the output
+ * ((filter_result + dest + 1) >> 1) and stores that in the output.
+ */
+static void filter_block2d_avg_6(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[(3 + Interp_Extend * 2) * 4]; /* Temp data buffer used in filtering */
+
+ /* First filter 1-D horizontally... */
+ filter_block2d_first_pass_6(src_ptr - ((Interp_Extend - 1) * src_pixels_per_line),
+ FData, src_pixels_per_line, 1,
+ 3 + Interp_Extend * 2, 4, HFilter);
+
+ /* then filter verticaly... */
+ filter_block2d_second_pass_avg_6(FData + 4 * (Interp_Extend - 1), output_ptr,
+ output_pitch, 4, 4, 4, 4, VFilter);
+}
+
+void vp9_sixtap_predict_avg_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 = vp9_sub_pel_filters_6[xoffset]; /* 6 tap */
+ VFilter = vp9_sub_pel_filters_6[yoffset]; /* 6 tap */
+
+ filter_block2d_avg_6(src_ptr, dst_ptr, src_pixels_per_line,
+ dst_pitch, HFilter, VFilter);
+}
+
+void vp9_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[(7+Interp_Extend*2)*16]; /* Temp data buffer used in filtering */
+ int FData[(7 + Interp_Extend * 2) * 8]; /* Temp data buffer used in filtering */
+
+ HFilter = vp9_sub_pel_filters_6[xoffset]; /* 6 tap */
+ VFilter = vp9_sub_pel_filters_6[yoffset]; /* 6 tap */
+
+ /* First filter 1-D horizontally... */
+ filter_block2d_first_pass_6(src_ptr - ((Interp_Extend - 1) * src_pixels_per_line), FData, src_pixels_per_line, 1,
+ 7 + Interp_Extend * 2, 8, HFilter);
+
+
+ /* then filter verticaly... */
+ filter_block2d_second_pass_6(FData + 8 * (Interp_Extend - 1), dst_ptr, dst_pitch, 8, 8, 8, 8, VFilter);
+
+}
+
+void vp9_sixtap_predict_avg8x8_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[(7+Interp_Extend*2)*16]; /* Temp data buffer used in filtering */
+ int FData[(7 + Interp_Extend * 2) * 8]; /* Temp data buffer used in filtering */
+
+ HFilter = vp9_sub_pel_filters_6[xoffset]; /* 6 tap */
+ VFilter = vp9_sub_pel_filters_6[yoffset]; /* 6 tap */
+
+ /* First filter 1-D horizontally... */
+ filter_block2d_first_pass_6(src_ptr - ((Interp_Extend - 1) * src_pixels_per_line), FData, src_pixels_per_line, 1,
+ 7 + Interp_Extend * 2, 8, HFilter);
+
+ /* then filter verticaly... */
+ filter_block2d_second_pass_avg_6(FData + 8 * (Interp_Extend - 1), dst_ptr, dst_pitch, 8, 8, 8, 8, VFilter);
+}
+
+void vp9_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[(7+Interp_Extend*2)*16]; /* Temp data buffer used in filtering */
+ int FData[(3 + Interp_Extend * 2) * 8]; /* Temp data buffer used in filtering */
+
+ HFilter = vp9_sub_pel_filters_6[xoffset]; /* 6 tap */
+ VFilter = vp9_sub_pel_filters_6[yoffset]; /* 6 tap */
+
+ /* First filter 1-D horizontally... */
+ filter_block2d_first_pass_6(src_ptr - ((Interp_Extend - 1) * src_pixels_per_line), FData, src_pixels_per_line, 1,
+ 3 + Interp_Extend * 2, 8, HFilter);
+
+
+ /* then filter verticaly... */
+ filter_block2d_second_pass_6(FData + 8 * (Interp_Extend - 1), dst_ptr, dst_pitch, 8, 8, 4, 8, VFilter);
+
+}
+
+void vp9_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[(15+Interp_Extend*2)*24]; /* Temp data buffer used in filtering */
+ int FData[(15 + Interp_Extend * 2) * 16]; /* Temp data buffer used in filtering */
+
+
+ HFilter = vp9_sub_pel_filters_6[xoffset]; /* 6 tap */
+ VFilter = vp9_sub_pel_filters_6[yoffset]; /* 6 tap */
+
+ /* First filter 1-D horizontally... */
+ filter_block2d_first_pass_6(src_ptr - ((Interp_Extend - 1) * src_pixels_per_line), FData, src_pixels_per_line, 1,
+ 15 + Interp_Extend * 2, 16, HFilter);
+
+ /* then filter verticaly... */
+ filter_block2d_second_pass_6(FData + 16 * (Interp_Extend - 1), dst_ptr, dst_pitch, 16, 16, 16, 16, VFilter);
+
+}
+
+void vp9_sixtap_predict_avg16x16_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[(15+Interp_Extend*2)*24]; /* Temp data buffer used in filtering */
+ int FData[(15 + Interp_Extend * 2) * 16]; /* Temp data buffer used in filtering */
+
+ HFilter = vp9_sub_pel_filters_6[xoffset]; /* 6 tap */
+ VFilter = vp9_sub_pel_filters_6[yoffset]; /* 6 tap */
+
+ /* First filter 1-D horizontally... */
+ filter_block2d_first_pass_6(src_ptr - ((Interp_Extend - 1) * src_pixels_per_line), FData,
+ src_pixels_per_line, 1, 15 + Interp_Extend * 2, 16, HFilter);
+
+ /* then filter verticaly... */
+ filter_block2d_second_pass_avg_6(FData + 16 * (Interp_Extend - 1), dst_ptr, dst_pitch,
+ 16, 16, 16, 16, VFilter);
+}
+
+typedef enum {
+ VPX_FILTER_4x4 = 0,
+ VPX_FILTER_8x8 = 1,
+ VPX_FILTER_8x4 = 2,
+ VPX_FILTER_16x16 = 3,
+} filter_size_t;
+
+static const unsigned int filter_size_to_wh[][2] = {
+ {4, 4},
+ {8, 8},
+ {8, 4},
+ {16,16},
+};
+
+static const unsigned int filter_max_height = 16;
+static const unsigned int filter_max_width = 16;
+
+static void filter_block2d_8_c(const unsigned char *src_ptr,
+ const unsigned int src_stride,
+ const short *HFilter,
+ const short *VFilter,
+ const filter_size_t filter_size,
+ unsigned char *dst_ptr,
+ unsigned int dst_stride) {
+ const unsigned int output_width = filter_size_to_wh[filter_size][0];
+ const unsigned int output_height = filter_size_to_wh[filter_size][1];
+
+ // Between passes, we use an intermediate buffer whose height is extended to
+ // have enough horizontally filtered values as input for the vertical pass.
+ // This buffer is allocated to be big enough for the largest block type we
+ // support.
+ const int kInterp_Extend = 4;
+ const unsigned int intermediate_height =
+ (kInterp_Extend - 1) + output_height + kInterp_Extend;
+ const unsigned int max_intermediate_height =
+ (kInterp_Extend - 1) + filter_max_height + kInterp_Extend;
+#ifdef _MSC_VER
+ // MSVC does not support C99 style declaration
+ unsigned char intermediate_buffer[23 * 16];
+#else
+ unsigned char intermediate_buffer[max_intermediate_height * filter_max_width];
+#endif
+ const int intermediate_next_stride = 1 - intermediate_height * output_width;
+
+ // Horizontal pass (src -> transposed intermediate).
+ {
+ unsigned char *output_ptr = intermediate_buffer;
+ const int src_next_row_stride = src_stride - output_width;
+ unsigned int i, j;
+ src_ptr -= (kInterp_Extend - 1) * src_stride + (kInterp_Extend - 1);
+ for (i = 0; i < intermediate_height; i++) {
+ for (j = 0; j < output_width; j++) {
+ // Apply filter...
+ int temp = ((int)src_ptr[0] * HFilter[0]) +
+ ((int)src_ptr[1] * HFilter[1]) +
+ ((int)src_ptr[2] * HFilter[2]) +
+ ((int)src_ptr[3] * HFilter[3]) +
+ ((int)src_ptr[4] * HFilter[4]) +
+ ((int)src_ptr[5] * HFilter[5]) +
+ ((int)src_ptr[6] * HFilter[6]) +
+ ((int)src_ptr[7] * HFilter[7]) +
+ (VP9_FILTER_WEIGHT >> 1); // Rounding
+
+ // Normalize back to 0-255...
+ temp >>= VP9_FILTER_SHIFT;
+ if (temp < 0) {
+ temp = 0;
+ } else if (temp > 255) {
+ temp = 255;
+ }
+ src_ptr++;
+ *output_ptr = temp;
+ output_ptr += intermediate_height;
+ }
+ src_ptr += src_next_row_stride;
+ output_ptr += intermediate_next_stride;
+ }
+ }
+
+ // Vertical pass (transposed intermediate -> dst).
+ {
+ unsigned char *src_ptr = intermediate_buffer;
+ const int dst_next_row_stride = dst_stride - output_width;
+ unsigned int i, j;
+ for (i = 0; i < output_height; i++) {
+ for (j = 0; j < output_width; j++) {
+ // Apply filter...
+ int temp = ((int)src_ptr[0] * VFilter[0]) +
+ ((int)src_ptr[1] * VFilter[1]) +
+ ((int)src_ptr[2] * VFilter[2]) +
+ ((int)src_ptr[3] * VFilter[3]) +
+ ((int)src_ptr[4] * VFilter[4]) +
+ ((int)src_ptr[5] * VFilter[5]) +
+ ((int)src_ptr[6] * VFilter[6]) +
+ ((int)src_ptr[7] * VFilter[7]) +
+ (VP9_FILTER_WEIGHT >> 1); // Rounding
+
+ // Normalize back to 0-255...
+ temp >>= VP9_FILTER_SHIFT;
+ if (temp < 0) {
+ temp = 0;
+ } else if (temp > 255) {
+ temp = 255;
+ }
+
+ src_ptr += intermediate_height;
+ *dst_ptr++ = (unsigned char)temp;
+ }
+ src_ptr += intermediate_next_stride;
+ dst_ptr += dst_next_row_stride;
+ }
+ }
+}
+
+void vp9_filter_block2d_4x4_8_c(const unsigned char *src_ptr,
+ const unsigned int src_stride,
+ const short *HFilter_aligned16,
+ const short *VFilter_aligned16,
+ unsigned char *dst_ptr,
+ unsigned int dst_stride) {
+ filter_block2d_8_c(src_ptr, src_stride,
+ HFilter_aligned16, VFilter_aligned16,
+ VPX_FILTER_4x4, dst_ptr, dst_stride);
+}
+
+void vp9_filter_block2d_8x4_8_c(const unsigned char *src_ptr,
+ const unsigned int src_stride,
+ const short *HFilter_aligned16,
+ const short *VFilter_aligned16,
+ unsigned char *dst_ptr,
+ unsigned int dst_stride) {
+ filter_block2d_8_c(src_ptr, src_stride,
+ HFilter_aligned16, VFilter_aligned16,
+ VPX_FILTER_8x4, dst_ptr, dst_stride);
+}
+
+void vp9_filter_block2d_8x8_8_c(const unsigned char *src_ptr,
+ const unsigned int src_stride,
+ const short *HFilter_aligned16,
+ const short *VFilter_aligned16,
+ unsigned char *dst_ptr,
+ unsigned int dst_stride) {
+ filter_block2d_8_c(src_ptr, src_stride,
+ HFilter_aligned16, VFilter_aligned16,
+ VPX_FILTER_8x8, dst_ptr, dst_stride);
+}
+
+void vp9_filter_block2d_16x16_8_c(const unsigned char *src_ptr,
+ const unsigned int src_stride,
+ const short *HFilter_aligned16,
+ const short *VFilter_aligned16,
+ unsigned char *dst_ptr,
+ unsigned int dst_stride) {
+ filter_block2d_8_c(src_ptr, src_stride,
+ HFilter_aligned16, VFilter_aligned16,
+ VPX_FILTER_16x16, dst_ptr, dst_stride);
+}
+
+static void block2d_average_c(unsigned char *src,
+ unsigned int src_stride,
+ unsigned char *output_ptr,
+ unsigned int output_stride,
+ const filter_size_t filter_size) {
+ const unsigned int output_width = filter_size_to_wh[filter_size][0];
+ const unsigned int output_height = filter_size_to_wh[filter_size][1];
+
+ unsigned int i, j;
+ for (i = 0; i < output_height; i++) {
+ for (j = 0; j < output_width; j++) {
+ output_ptr[j] = (output_ptr[j] + src[i * src_stride + j] + 1) >> 1;
+ }
+ output_ptr += output_stride;
+ }
+}
+
+#define block2d_average block2d_average_c
+
+void vp9_eighttap_predict_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 = vp9_sub_pel_filters_8[xoffset];
+ VFilter = vp9_sub_pel_filters_8[yoffset];
+
+ vp9_filter_block2d_4x4_8(src_ptr, src_pixels_per_line,
+ HFilter, VFilter,
+ dst_ptr, dst_pitch);
+}
+
+void vp9_eighttap_predict_avg4x4_c(unsigned char *src_ptr,
+ int src_pixels_per_line,
+ int xoffset,
+ int yoffset,
+ unsigned char *dst_ptr,
+ int dst_pitch) {
+ const short *HFilter = vp9_sub_pel_filters_8[xoffset];
+ const short *VFilter = vp9_sub_pel_filters_8[yoffset];
+ unsigned char tmp[4 * 4];
+
+ vp9_filter_block2d_4x4_8(src_ptr, src_pixels_per_line,
+ HFilter, VFilter,
+ tmp, 4);
+ block2d_average(tmp, 4, dst_ptr, dst_pitch, VPX_FILTER_4x4);
+}
+
+void vp9_eighttap_predict_sharp_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 = vp9_sub_pel_filters_8s[xoffset];
+ VFilter = vp9_sub_pel_filters_8s[yoffset];
+
+ vp9_filter_block2d_4x4_8(src_ptr, src_pixels_per_line,
+ HFilter, VFilter,
+ dst_ptr, dst_pitch);
+}
+
+void vp9_eighttap_predict_avg4x4_sharp_c(unsigned char *src_ptr,
+ int src_pixels_per_line,
+ int xoffset,
+ int yoffset,
+ unsigned char *dst_ptr,
+ int dst_pitch) {
+ const short *HFilter = vp9_sub_pel_filters_8s[xoffset];
+ const short *VFilter = vp9_sub_pel_filters_8s[yoffset];
+ unsigned char tmp[4 * 4];
+
+ vp9_filter_block2d_4x4_8(src_ptr, src_pixels_per_line,
+ HFilter, VFilter,
+ tmp, 4);
+ block2d_average(tmp, 4, dst_ptr, dst_pitch, VPX_FILTER_4x4);
+}
+
+void vp9_eighttap_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 = vp9_sub_pel_filters_8[xoffset];
+ const short *VFilter = vp9_sub_pel_filters_8[yoffset];
+
+ vp9_filter_block2d_8x8_8(src_ptr, src_pixels_per_line,
+ HFilter, VFilter,
+ dst_ptr, dst_pitch);
+}
+
+void vp9_eighttap_predict8x8_sharp_c(unsigned char *src_ptr,
+ int src_pixels_per_line,
+ int xoffset,
+ int yoffset,
+ unsigned char *dst_ptr,
+ int dst_pitch) {
+ const short *HFilter = vp9_sub_pel_filters_8s[xoffset];
+ const short *VFilter = vp9_sub_pel_filters_8s[yoffset];
+
+ vp9_filter_block2d_8x8_8(src_ptr, src_pixels_per_line,
+ HFilter, VFilter,
+ dst_ptr, dst_pitch);
+}
+
+void vp9_eighttap_predict_avg8x8_c(unsigned char *src_ptr,
+ int src_pixels_per_line,
+ int xoffset,
+ int yoffset,
+ unsigned char *dst_ptr,
+ int dst_pitch) {
+ unsigned char tmp[8 * 8];
+ const short *HFilter = vp9_sub_pel_filters_8[xoffset];
+ const short *VFilter = vp9_sub_pel_filters_8[yoffset];
+
+ vp9_filter_block2d_8x8_8(src_ptr, src_pixels_per_line,
+ HFilter, VFilter,
+ tmp, 8);
+ block2d_average(tmp, 8, dst_ptr, dst_pitch, VPX_FILTER_8x8);
+}
+
+void vp9_eighttap_predict_avg8x8_sharp_c(unsigned char *src_ptr,
+ int src_pixels_per_line,
+ int xoffset,
+ int yoffset,
+ unsigned char *dst_ptr,
+ int dst_pitch) {
+ unsigned char tmp[8 * 8];
+ const short *HFilter = vp9_sub_pel_filters_8s[xoffset];
+ const short *VFilter = vp9_sub_pel_filters_8s[yoffset];
+
+ vp9_filter_block2d_8x8_8(src_ptr, src_pixels_per_line,
+ HFilter, VFilter,
+ tmp, 8);
+ block2d_average(tmp, 8, dst_ptr, dst_pitch, VPX_FILTER_8x8);
+}
+
+void vp9_eighttap_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 = vp9_sub_pel_filters_8[xoffset];
+ const short *VFilter = vp9_sub_pel_filters_8[yoffset];
+
+ vp9_filter_block2d_8x4_8(src_ptr, src_pixels_per_line,
+ HFilter, VFilter,
+ dst_ptr, dst_pitch);
+}
+
+void vp9_eighttap_predict8x4_sharp_c(unsigned char *src_ptr,
+ int src_pixels_per_line,
+ int xoffset,
+ int yoffset,
+ unsigned char *dst_ptr,
+ int dst_pitch) {
+ const short *HFilter = vp9_sub_pel_filters_8s[xoffset];
+ const short *VFilter = vp9_sub_pel_filters_8s[yoffset];
+
+ vp9_filter_block2d_8x4_8(src_ptr, src_pixels_per_line,
+ HFilter, VFilter,
+ dst_ptr, dst_pitch);
+}
+
+void vp9_eighttap_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 = vp9_sub_pel_filters_8[xoffset];
+ const short *VFilter = vp9_sub_pel_filters_8[yoffset];
+
+ vp9_filter_block2d_16x16_8(src_ptr, src_pixels_per_line,
+ HFilter, VFilter,
+ dst_ptr, dst_pitch);
+}
+
+void vp9_eighttap_predict16x16_sharp_c(unsigned char *src_ptr,
+ int src_pixels_per_line,
+ int xoffset,
+ int yoffset,
+ unsigned char *dst_ptr,
+ int dst_pitch) {
+ const short *HFilter = vp9_sub_pel_filters_8s[xoffset];
+ const short *VFilter = vp9_sub_pel_filters_8s[yoffset];
+
+ vp9_filter_block2d_16x16_8(src_ptr, src_pixels_per_line,
+ HFilter, VFilter,
+ dst_ptr, dst_pitch);
+}
+
+void vp9_eighttap_predict_avg16x16_c(unsigned char *src_ptr,
+ int src_pixels_per_line,
+ int xoffset,
+ int yoffset,
+ unsigned char *dst_ptr,
+ int dst_pitch) {
+ DECLARE_ALIGNED_ARRAY(16, unsigned char, tmp, 16 * 16);
+ const short *HFilter = vp9_sub_pel_filters_8[xoffset];
+ const short *VFilter = vp9_sub_pel_filters_8[yoffset];
+
+ vp9_filter_block2d_16x16_8(src_ptr, src_pixels_per_line,
+ HFilter, VFilter,
+ tmp, 16);
+ block2d_average(tmp, 16, dst_ptr, dst_pitch, VPX_FILTER_16x16);
+}
+
+void vp9_eighttap_predict_avg16x16_sharp_c(unsigned char *src_ptr,
+ int src_pixels_per_line,
+ int xoffset,
+ int yoffset,
+ unsigned char *dst_ptr,
+ int dst_pitch) {
+ DECLARE_ALIGNED_ARRAY(16, unsigned char, tmp, 16 * 16);
+ const short *HFilter = vp9_sub_pel_filters_8s[xoffset];
+ const short *VFilter = vp9_sub_pel_filters_8s[yoffset];
+
+ vp9_filter_block2d_16x16_8(src_ptr, src_pixels_per_line,
+ HFilter, VFilter,
+ tmp, 16);
+ block2d_average(tmp, 16, dst_ptr, dst_pitch, VPX_FILTER_16x16);
+}
+
+/****************************************************************************
+ *
+ * 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 *vp9_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 VP9_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 *vp9_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] * vp9_filter[0]) +
+ ((int)src_ptr[1] * vp9_filter[1]) +
+ (VP9_FILTER_WEIGHT / 2)) >> VP9_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 *vp9_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 VP9_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 *vp9_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] * vp9_filter[0]) +
+ ((int)src_ptr[width] * vp9_filter[1]) +
+ (VP9_FILTER_WEIGHT / 2);
+ dst_ptr[j] = (unsigned int)(Temp >> VP9_FILTER_SHIFT);
+ src_ptr++;
+ }
+
+ /* Next row... */
+ dst_ptr += dst_pitch;
+ }
+}
+
+/*
+ * As before for filter_block2d_second_pass_avg(), the functional difference
+ * between filter_block2d_bil_second_pass() and filter_block2d_bil_second_pass_avg()
+ * is that filter_block2d_bil_second_pass() does a bilinear filter on input
+ * and stores the result in output; filter_block2d_bil_second_pass_avg(),
+ * instead, does a bilinear filter on input, averages the resulting value
+ * with the values already present in the output and stores the result of
+ * that back into the output ((filter_result + dest + 1) >> 1).
+ */
+static void filter_block2d_bil_second_pass_avg(unsigned short *src_ptr,
+ unsigned char *dst_ptr,
+ int dst_pitch,
+ unsigned int height,
+ unsigned int width,
+ const short *vp9_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] * vp9_filter[0]) +
+ ((int)src_ptr[width] * vp9_filter[1]) +
+ (VP9_FILTER_WEIGHT / 2);
+ dst_ptr[j] = (unsigned int)(((Temp >> VP9_FILTER_SHIFT) + dst_ptr[j] + 1) >> 1);
+ 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);
+}
+
+static void filter_block2d_bil_avg(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_avg(FData, dst_ptr, dst_pitch, Height, Width, VFilter);
+}
+
+void vp9_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 = vp9_bilinear_filters[xoffset];
+ VFilter = vp9_bilinear_filters[yoffset];
+
+ filter_block2d_bil(src_ptr, dst_ptr, src_pixels_per_line, dst_pitch, HFilter, VFilter, 4, 4);
+}
+
+void vp9_bilinear_predict_avg4x4_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 = vp9_bilinear_filters[xoffset];
+ VFilter = vp9_bilinear_filters[yoffset];
+
+ filter_block2d_bil_avg(src_ptr, dst_ptr, src_pixels_per_line,
+ dst_pitch, HFilter, VFilter, 4, 4);
+}
+
+void vp9_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 = vp9_bilinear_filters[xoffset];
+ VFilter = vp9_bilinear_filters[yoffset];
+
+ filter_block2d_bil(src_ptr, dst_ptr, src_pixels_per_line, dst_pitch, HFilter, VFilter, 8, 8);
+
+}
+
+void vp9_bilinear_predict_avg8x8_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 = vp9_bilinear_filters[xoffset];
+ VFilter = vp9_bilinear_filters[yoffset];
+
+ filter_block2d_bil_avg(src_ptr, dst_ptr, src_pixels_per_line,
+ dst_pitch, HFilter, VFilter, 8, 8);
+}
+
+void vp9_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 = vp9_bilinear_filters[xoffset];
+ VFilter = vp9_bilinear_filters[yoffset];
+
+ filter_block2d_bil(src_ptr, dst_ptr, src_pixels_per_line, dst_pitch, HFilter, VFilter, 8, 4);
+
+}
+
+void vp9_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 = vp9_bilinear_filters[xoffset];
+ VFilter = vp9_bilinear_filters[yoffset];
+
+ filter_block2d_bil(src_ptr, dst_ptr, src_pixels_per_line, dst_pitch, HFilter, VFilter, 16, 16);
+}
+
+void vp9_bilinear_predict_avg16x16_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 = vp9_bilinear_filters[xoffset];
+ VFilter = vp9_bilinear_filters[yoffset];
+
+ filter_block2d_bil_avg(src_ptr, dst_ptr, src_pixels_per_line,
+ dst_pitch, HFilter, VFilter, 16, 16);
+}
Property changes on: source/libvpx/vp9/common/vp9_filter.c
___________________________________________________________________
Added: svn:eol-style
+ LF
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