FFmpeg
swscale_ppc_template.c
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1 /*
2  * AltiVec-enhanced yuv2yuvX
3  *
4  * Copyright (C) 2004 Romain Dolbeau <romain@dolbeau.org>
5  * based on the equivalent C code in swscale.c
6  *
7  * This file is part of FFmpeg.
8  *
9  * FFmpeg is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU Lesser General Public
11  * License as published by the Free Software Foundation; either
12  * version 2.1 of the License, or (at your option) any later version.
13  *
14  * FFmpeg is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17  * Lesser General Public License for more details.
18  *
19  * You should have received a copy of the GNU Lesser General Public
20  * License along with FFmpeg; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22  */
23 
24 static void FUNC(yuv2planeX_8_16)(const int16_t *filter, int filterSize,
25  const int16_t **src, uint8_t *dest,
26  const uint8_t *dither, int offset, int x)
27 {
28  register int i, j;
29  LOCAL_ALIGNED(16, int, val, [16]);
30  vector signed int vo1, vo2, vo3, vo4;
31  vector unsigned short vs1, vs2;
32  vector unsigned char vf;
33  vector unsigned int altivec_vectorShiftInt19 =
34  vec_add(vec_splat_u32(10), vec_splat_u32(9));
35 
36  for (i = 0; i < 16; i++)
37  val[i] = dither[(x + i + offset) & 7] << 12;
38 
39  vo1 = vec_ld(0, val);
40  vo2 = vec_ld(16, val);
41  vo3 = vec_ld(32, val);
42  vo4 = vec_ld(48, val);
43 
44  for (j = 0; j < filterSize; j++) {
45  unsigned int joffset=j<<1;
46  unsigned int xoffset=x<<1;
47  vector unsigned char av_unused perm;
48  vector signed short l1,vLumFilter;
49  LOAD_FILTER(vLumFilter,filter);
50  vLumFilter = vec_splat(vLumFilter, 0);
51  LOAD_L1(l1,src[j],perm);
52  yuv2planeX_8(vo1, vo2, l1, src[j], x, perm, vLumFilter);
53  yuv2planeX_8(vo3, vo4, l1, src[j], x + 8, perm, vLumFilter);
54  }
55 
56  vo1 = vec_sra(vo1, altivec_vectorShiftInt19);
57  vo2 = vec_sra(vo2, altivec_vectorShiftInt19);
58  vo3 = vec_sra(vo3, altivec_vectorShiftInt19);
59  vo4 = vec_sra(vo4, altivec_vectorShiftInt19);
60  vs1 = vec_packsu(vo1, vo2);
61  vs2 = vec_packsu(vo3, vo4);
62  vf = vec_packsu(vs1, vs2);
63  VEC_ST(vf, 0, dest);
64 }
65 
66 
67 static inline void yuv2planeX_u(const int16_t *filter, int filterSize,
68  const int16_t **src, uint8_t *dest, int dstW,
69  const uint8_t *dither, int offset, int x)
70 {
71  int i, j;
72 
73  for (i = x; i < dstW; i++) {
74  int t = dither[(i + offset) & 7] << 12;
75  for (j = 0; j < filterSize; j++)
76  t += src[j][i] * filter[j];
77  dest[i] = av_clip_uint8(t >> 19);
78  }
79 }
80 
81 static void FUNC(yuv2planeX)(const int16_t *filter, int filterSize,
82  const int16_t **src, uint8_t *dest, int dstW,
83  const uint8_t *dither, int offset)
84 {
85  int dst_u = -(uintptr_t)dest & 15;
86  int i;
87 
88  yuv2planeX_u(filter, filterSize, src, dest, dst_u, dither, offset, 0);
89 
90  for (i = dst_u; i < dstW - 15; i += 16)
91  FUNC(yuv2planeX_8_16)(filter, filterSize, src, dest + i, dither,
92  offset, i);
93 
94  yuv2planeX_u(filter, filterSize, src, dest, dstW, dither, offset, i);
95 }
96 
97 static void FUNC(hScale_real)(SwsContext *c, int16_t *dst, int dstW,
98  const uint8_t *src, const int16_t *filter,
99  const int32_t *filterPos, int filterSize)
100 {
101  register int i;
102  LOCAL_ALIGNED(16, int, tempo, [4]);
103 
104  if (filterSize % 4) {
105  for (i = 0; i < dstW; i++) {
106  register int j;
107  register int srcPos = filterPos[i];
108  register int val = 0;
109  for (j = 0; j < filterSize; j++)
110  val += ((int)src[srcPos + j]) * filter[filterSize * i + j];
111  dst[i] = FFMIN(val >> 7, (1 << 15) - 1);
112  }
113  } else
114  switch (filterSize) {
115  case 4:
116  for (i = 0; i < dstW; i++) {
117  register int srcPos = filterPos[i];
118 
119  vector unsigned char src_vF = unaligned_load(srcPos, src);
120  vector signed short src_v, filter_v;
121  vector signed int val_vEven, val_s;
122  src_v = // vec_unpackh sign-extends...
123  (vector signed short)(VEC_MERGEH((vector unsigned char)vzero, src_vF));
124  // now put our elements in the even slots
125  src_v = vec_mergeh(src_v, (vector signed short)vzero);
126  GET_VF4(i, filter_v, filter);
127  val_vEven = vec_mule(src_v, filter_v);
128  val_s = vec_sums(val_vEven, vzero);
129  vec_st(val_s, 0, tempo);
130  dst[i] = FFMIN(tempo[3] >> 7, (1 << 15) - 1);
131  }
132  break;
133  case 8:
134  for (i = 0; i < dstW; i++) {
135  register int srcPos = filterPos[i];
136  vector unsigned char src_vF, av_unused src_v0, av_unused src_v1;
137  vector unsigned char av_unused permS;
138  vector signed short src_v, filter_v;
139  vector signed int val_v, val_s;
140  FIRST_LOAD(src_v0, srcPos, src, permS);
141  LOAD_SRCV8(srcPos, 0, src, permS, src_v0, src_v1, src_vF);
142  src_v = // vec_unpackh sign-extends...
143  (vector signed short)(VEC_MERGEH((vector unsigned char)vzero, src_vF));
144  filter_v = vec_ld(i << 4, filter);
145  val_v = vec_msums(src_v, filter_v, (vector signed int)vzero);
146  val_s = vec_sums(val_v, vzero);
147  vec_st(val_s, 0, tempo);
148  dst[i] = FFMIN(tempo[3] >> 7, (1 << 15) - 1);
149  }
150  break;
151 
152  case 16:
153  for (i = 0; i < dstW; i++) {
154  register int srcPos = filterPos[i];
155 
156  vector unsigned char src_vF = unaligned_load(srcPos, src);
157  vector signed short src_vA = // vec_unpackh sign-extends...
158  (vector signed short)(VEC_MERGEH((vector unsigned char)vzero, src_vF));
159  vector signed short src_vB = // vec_unpackh sign-extends...
160  (vector signed short)(VEC_MERGEL((vector unsigned char)vzero, src_vF));
161  vector signed short filter_v0 = vec_ld(i << 5, filter);
162  vector signed short filter_v1 = vec_ld((i << 5) + 16, filter);
163 
164  vector signed int val_acc = vec_msums(src_vA, filter_v0, (vector signed int)vzero);
165  vector signed int val_v = vec_msums(src_vB, filter_v1, val_acc);
166 
167  vector signed int val_s = vec_sums(val_v, vzero);
168 
169  VEC_ST(val_s, 0, tempo);
170  dst[i] = FFMIN(tempo[3] >> 7, (1 << 15) - 1);
171  }
172  break;
173 
174  default:
175  for (i = 0; i < dstW; i++) {
176  register int j, av_unused offset = i * 2 * filterSize;
177  register int srcPos = filterPos[i];
178 
179  vector signed int val_s, val_v = (vector signed int)vzero;
180  vector signed short av_unused filter_v0R;
181  vector unsigned char av_unused permF, av_unused src_v0, av_unused permS;
182  FIRST_LOAD(filter_v0R, offset, filter, permF);
183  FIRST_LOAD(src_v0, srcPos, src, permS);
184 
185  for (j = 0; j < filterSize - 15; j += 16) {
186  vector unsigned char av_unused src_v1, src_vF;
187  vector signed short av_unused filter_v1R, av_unused filter_v2R,
188  filter_v0, filter_v1, src_vA, src_vB;
189  vector signed int val_acc;
190  LOAD_SRCV(srcPos, j, src, permS, src_v0, src_v1, src_vF);
191  src_vA = // vec_unpackh sign-extends...
192  (vector signed short)(VEC_MERGEH((vector unsigned char)vzero, src_vF));
193  src_vB = // vec_unpackh sign-extends...
194  (vector signed short)(VEC_MERGEL((vector unsigned char)vzero, src_vF));
195  GET_VFD(i, j, filter, filter_v0R, filter_v1R, permF, filter_v0, 0);
196  GET_VFD(i, j, filter, filter_v1R, filter_v2R, permF, filter_v1, 16);
197 
198  val_acc = vec_msums(src_vA, filter_v0, val_v);
199  val_v = vec_msums(src_vB, filter_v1, val_acc);
200  UPDATE_PTR(filter_v2R, filter_v0R, src_v1, src_v0);
201  }
202 
203  if (j < filterSize - 7) {
204  // loading src_v0 is useless, it's already done above
205  vector unsigned char av_unused src_v1, src_vF;
206  vector signed short src_v, av_unused filter_v1R, filter_v;
207  LOAD_SRCV8(srcPos, j, src, permS, src_v0, src_v1, src_vF);
208  src_v = // vec_unpackh sign-extends...
209  (vector signed short)(VEC_MERGEH((vector unsigned char)vzero, src_vF));
210  GET_VFD(i, j, filter, filter_v0R, filter_v1R, permF, filter_v, 0);
211  val_v = vec_msums(src_v, filter_v, val_v);
212  }
213  val_s = vec_sums(val_v, vzero);
214 
215  VEC_ST(val_s, 0, tempo);
216  dst[i] = FFMIN(tempo[3] >> 7, (1 << 15) - 1);
217  }
218  }
219 }
static void FUNC() hScale_real(SwsContext *c, int16_t *dst, int dstW, const uint8_t *src, const int16_t *filter, const int32_t *filterPos, int filterSize)
const char const char void * val
Definition: avisynth_c.h:863
static void yuv2planeX_u(const int16_t *filter, int filterSize, const int16_t **src, uint8_t *dest, int dstW, const uint8_t *dither, int offset, int x)
#define src
Definition: vp8dsp.c:254
uint8_t
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#define FUNC(a)
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Definition: vf_fspp.c:57
#define FFMIN(a, b)
Definition: common.h:96
int32_t
perm
Definition: f_perms.c:74
static void FUNC() yuv2planeX_8_16(const int16_t *filter, int filterSize, const int16_t **src, uint8_t *dest, const uint8_t *dither, int offset, int x)
int
static void FUNC() yuv2planeX(const int16_t *filter, int filterSize, const int16_t **src, uint8_t *dest, int dstW, const uint8_t *dither, int offset)
#define LOCAL_ALIGNED(a, t, v,...)
Definition: internal.h:114
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Definition: attributes.h:125