2 * AltiVec-enhanced yuv2yuvX
4 * Copyright (C) 2004 Romain Dolbeau <romain@dolbeau.org>
5 * based on the equivalent C code in swscale.c
7 * This file is part of FFmpeg.
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.
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.
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
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)
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));
36 for (i = 0; i < 16; i++)
37 val[i] = dither[(x + i + offset) & 7] << 12;
40 vo2 = vec_ld(16, val);
41 vo3 = vec_ld(32, val);
42 vo4 = vec_ld(48, val);
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);
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);
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)
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);
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)
85 int dst_u = -(uintptr_t)dest & 15;
88 yuv2planeX_u(filter, filterSize, src, dest, dst_u, dither, offset, 0);
90 for (i = dst_u; i < dstW - 15; i += 16)
91 FUNC(yuv2planeX_8_16)(filter, filterSize, src, dest + i, dither,
94 yuv2planeX_u(filter, filterSize, src, dest, dstW, dither, offset, i);
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)
102 LOCAL_ALIGNED(16, int, tempo, [4]);
104 if (filterSize % 4) {
105 for (i = 0; i < dstW; i++) {
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);
114 switch (filterSize) {
116 for (i = 0; i < dstW; i++) {
117 register int srcPos = filterPos[i];
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);
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);
153 for (i = 0; i < dstW; i++) {
154 register int srcPos = filterPos[i];
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);
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);
167 vector signed int val_s = vec_sums(val_v, vzero);
169 VEC_ST(val_s, 0, tempo);
170 dst[i] = FFMIN(tempo[3] >> 7, (1 << 15) - 1);
175 for (i = 0; i < dstW; i++) {
176 register int j, av_unused offset = i * 2 * filterSize;
177 register int srcPos = filterPos[i];
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);
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);
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);
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);
213 val_s = vec_sums(val_v, vzero);
215 VEC_ST(val_s, 0, tempo);
216 dst[i] = FFMIN(tempo[3] >> 7, (1 << 15) - 1);