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diracdsp.c
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1 /*
2  * Copyright (C) 2009 David Conrad
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #include "dsputil.h"
22 #include "diracdsp.h"
23 #include "libavcodec/x86/diracdsp_mmx.h"
24 
25 #define FILTER(src, stride) \
26  ((21*((src)[ 0*stride] + (src)[1*stride]) \
27  -7*((src)[-1*stride] + (src)[2*stride]) \
28  +3*((src)[-2*stride] + (src)[3*stride]) \
29  -1*((src)[-3*stride] + (src)[4*stride]) + 16) >> 5)
30 
31 static void dirac_hpel_filter(uint8_t *dsth, uint8_t *dstv, uint8_t *dstc, const uint8_t *src,
32  int stride, int width, int height)
33 {
34  int x, y;
35 
36  for (y = 0; y < height; y++) {
37  for (x = -3; x < width+5; x++)
38  dstv[x] = av_clip_uint8(FILTER(src+x, stride));
39 
40  for (x = 0; x < width; x++)
41  dstc[x] = av_clip_uint8(FILTER(dstv+x, 1));
42 
43  for (x = 0; x < width; x++)
44  dsth[x] = av_clip_uint8(FILTER(src+x, 1));
45 
46  src += stride;
47  dsth += stride;
48  dstv += stride;
49  dstc += stride;
50  }
51 }
52 
53 #define PIXOP_BILINEAR(PFX, OP, WIDTH) \
54  static void ff_ ## PFX ## _dirac_pixels ## WIDTH ## _bilinear_c(uint8_t *dst, const uint8_t *src[5], int stride, int h) \
55  { \
56  int x; \
57  const uint8_t *s0 = src[0]; \
58  const uint8_t *s1 = src[1]; \
59  const uint8_t *s2 = src[2]; \
60  const uint8_t *s3 = src[3]; \
61  const uint8_t *w = src[4]; \
62  \
63  while (h--) { \
64  for (x = 0; x < WIDTH; x++) { \
65  OP(dst[x], (s0[x]*w[0] + s1[x]*w[1] + s2[x]*w[2] + s3[x]*w[3] + 8) >> 4); \
66  } \
67  \
68  dst += stride; \
69  s0 += stride; \
70  s1 += stride; \
71  s2 += stride; \
72  s3 += stride; \
73  } \
74  }
75 
76 #define OP_PUT(dst, val) (dst) = (val)
77 #define OP_AVG(dst, val) (dst) = (((dst) + (val) + 1)>>1)
78 
79 PIXOP_BILINEAR(put, OP_PUT, 8)
80 PIXOP_BILINEAR(put, OP_PUT, 16)
81 PIXOP_BILINEAR(put, OP_PUT, 32)
82 PIXOP_BILINEAR(avg, OP_AVG, 8)
83 PIXOP_BILINEAR(avg, OP_AVG, 16)
84 PIXOP_BILINEAR(avg, OP_AVG, 32)
85 
86 #define op_scale1(x) block[x] = av_clip_uint8( (block[x]*weight + (1<<(log2_denom-1))) >> log2_denom)
87 #define op_scale2(x) dst[x] = av_clip_uint8( (src[x]*weights + dst[x]*weightd + (1<<(log2_denom-1))) >> log2_denom)
88 
89 #define DIRAC_WEIGHT(W) \
90  static void weight_dirac_pixels ## W ## _c(uint8_t *block, int stride, int log2_denom, \
91  int weight, int h) { \
92  int x; \
93  while (h--) { \
94  for (x = 0; x < W; x++) { \
95  op_scale1(x); \
96  op_scale1(x+1); \
97  } \
98  block += stride; \
99  } \
100  } \
101  static void biweight_dirac_pixels ## W ## _c(uint8_t *dst, const uint8_t *src, int stride, int log2_denom, \
102  int weightd, int weights, int h) { \
103  int x; \
104  while (h--) { \
105  for (x = 0; x < W; x++) { \
106  op_scale2(x); \
107  op_scale2(x+1); \
108  } \
109  dst += stride; \
110  src += stride; \
111  } \
112  }
113 
114 DIRAC_WEIGHT(8)
115 DIRAC_WEIGHT(16)
116 DIRAC_WEIGHT(32)
117 
118 #define ADD_OBMC(xblen) \
119  static void add_obmc ## xblen ## _c(uint16_t *dst, const uint8_t *src, int stride, \
120  const uint8_t *obmc_weight, int yblen) \
121  { \
122  int x; \
123  while (yblen--) { \
124  for (x = 0; x < xblen; x += 2) { \
125  dst[x ] += src[x ] * obmc_weight[x ]; \
126  dst[x+1] += src[x+1] * obmc_weight[x+1]; \
127  } \
128  dst += stride; \
129  src += stride; \
130  obmc_weight += 32; \
131  } \
132  }
133 
134 ADD_OBMC(8)
135 ADD_OBMC(16)
136 ADD_OBMC(32)
137 
138 static void put_signed_rect_clamped_c(uint8_t *dst, int dst_stride, const int16_t *src, int src_stride, int width, int height)
139 {
140  int x, y;
141  for (y = 0; y < height; y++) {
142  for (x = 0; x < width; x+=4) {
143  dst[x ] = av_clip_uint8(src[x ] + 128);
144  dst[x+1] = av_clip_uint8(src[x+1] + 128);
145  dst[x+2] = av_clip_uint8(src[x+2] + 128);
146  dst[x+3] = av_clip_uint8(src[x+3] + 128);
147  }
148  dst += dst_stride;
149  src += src_stride;
150  }
151 }
152 
153 static void add_rect_clamped_c(uint8_t *dst, const uint16_t *src, int stride,
154  const int16_t *idwt, int idwt_stride,
155  int width, int height)
156 {
157  int x, y;
158 
159  for (y = 0; y < height; y++) {
160  for (x = 0; x < width; x+=2) {
161  dst[x ] = av_clip_uint8(((src[x ]+32)>>6) + idwt[x ]);
162  dst[x+1] = av_clip_uint8(((src[x+1]+32)>>6) + idwt[x+1]);
163  }
164  dst += stride;
165  src += stride;
166  idwt += idwt_stride;
167  }
168 }
169 
170 #define PIXFUNC(PFX, WIDTH) \
171  c->PFX ## _dirac_pixels_tab[WIDTH>>4][0] = ff_ ## PFX ## _dirac_pixels ## WIDTH ## _c; \
172  c->PFX ## _dirac_pixels_tab[WIDTH>>4][1] = ff_ ## PFX ## _dirac_pixels ## WIDTH ## _l2_c; \
173  c->PFX ## _dirac_pixels_tab[WIDTH>>4][2] = ff_ ## PFX ## _dirac_pixels ## WIDTH ## _l4_c; \
174  c->PFX ## _dirac_pixels_tab[WIDTH>>4][3] = ff_ ## PFX ## _dirac_pixels ## WIDTH ## _bilinear_c
175 
176 void ff_diracdsp_init(DiracDSPContext *c)
177 {
178  c->dirac_hpel_filter = dirac_hpel_filter;
179  c->add_rect_clamped = add_rect_clamped_c;
180  c->put_signed_rect_clamped = put_signed_rect_clamped_c;
181 
182  c->add_dirac_obmc[0] = add_obmc8_c;
183  c->add_dirac_obmc[1] = add_obmc16_c;
184  c->add_dirac_obmc[2] = add_obmc32_c;
185 
186  c->weight_dirac_pixels_tab[0] = weight_dirac_pixels8_c;
187  c->weight_dirac_pixels_tab[1] = weight_dirac_pixels16_c;
188  c->weight_dirac_pixels_tab[2] = weight_dirac_pixels32_c;
189  c->biweight_dirac_pixels_tab[0] = biweight_dirac_pixels8_c;
190  c->biweight_dirac_pixels_tab[1] = biweight_dirac_pixels16_c;
191  c->biweight_dirac_pixels_tab[2] = biweight_dirac_pixels32_c;
192 
193  PIXFUNC(put, 8);
194  PIXFUNC(put, 16);
195  PIXFUNC(put, 32);
196  PIXFUNC(avg, 8);
197  PIXFUNC(avg, 16);
198  PIXFUNC(avg, 32);
199 
200  if (HAVE_MMX && HAVE_YASM) ff_diracdsp_init_mmx(c);
201 }
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