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Imported Debian version 2.4.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libswscale / ppc / swscale_altivec.c
CommitLineData
2ba45a60
DM		 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#include <inttypes.h>
25
26#include "config.h"
27#include "libswscale/swscale.h"
28#include "libswscale/swscale_internal.h"
29#include "libavutil/attributes.h"
30#include "libavutil/cpu.h"
31#include "yuv2rgb_altivec.h"
32
33#if HAVE_ALTIVEC
34#define vzero vec_splat_s32(0)
35
36#define yuv2planeX_8(d1, d2, l1, src, x, perm, filter) do { \
37 vector signed short l2 = vec_ld(((x) << 1) + 16, src); \
38 vector signed short ls = vec_perm(l1, l2, perm); \
39 vector signed int i1 = vec_mule(filter, ls); \
40 vector signed int i2 = vec_mulo(filter, ls); \
41 vector signed int vf1 = vec_mergeh(i1, i2); \
42 vector signed int vf2 = vec_mergel(i1, i2); \
43 d1 = vec_add(d1, vf1); \
44 d2 = vec_add(d2, vf2); \
45 l1 = l2; \
46 } while (0)
47
48static void yuv2planeX_16_altivec(const int16_t *filter, int filterSize,
49 const int16_t **src, uint8_t *dest,
50 const uint8_t *dither, int offset, int x)
51{
52 register int i, j;
53 DECLARE_ALIGNED(16, int, val)[16];
54 vector signed int vo1, vo2, vo3, vo4;
55 vector unsigned short vs1, vs2;
56 vector unsigned char vf;
57 vector unsigned int altivec_vectorShiftInt19 =
58 vec_add(vec_splat_u32(10), vec_splat_u32(9));
59
60 for (i = 0; i < 16; i++)
61 val[i] = dither[(x + i + offset) & 7] << 12;
62
63 vo1 = vec_ld(0, val);
64 vo2 = vec_ld(16, val);
65 vo3 = vec_ld(32, val);
66 vo4 = vec_ld(48, val);
67
68 for (j = 0; j < filterSize; j++) {
69 vector signed short l1, vLumFilter = vec_ld(j << 1, filter);
70 vector unsigned char perm, perm0 = vec_lvsl(j << 1, filter);
71 vLumFilter = vec_perm(vLumFilter, vLumFilter, perm0);
72 vLumFilter = vec_splat(vLumFilter, 0); // lumFilter[j] is loaded 8 times in vLumFilter
73
74 perm = vec_lvsl(x << 1, src[j]);
75 l1 = vec_ld(x << 1, src[j]);
76
77 yuv2planeX_8(vo1, vo2, l1, src[j], x, perm, vLumFilter);
78 yuv2planeX_8(vo3, vo4, l1, src[j], x + 8, perm, vLumFilter);
79 }
80
81 vo1 = vec_sra(vo1, altivec_vectorShiftInt19);
82 vo2 = vec_sra(vo2, altivec_vectorShiftInt19);
83 vo3 = vec_sra(vo3, altivec_vectorShiftInt19);
84 vo4 = vec_sra(vo4, altivec_vectorShiftInt19);
85 vs1 = vec_packsu(vo1, vo2);
86 vs2 = vec_packsu(vo3, vo4);
87 vf = vec_packsu(vs1, vs2);
88 vec_st(vf, 0, dest);
89}
90
91static inline void yuv2planeX_u(const int16_t *filter, int filterSize,
92 const int16_t **src, uint8_t *dest, int dstW,
93 const uint8_t *dither, int offset, int x)
94{
95 int i, j;
96
97 for (i = x; i < dstW; i++) {
98 int t = dither[(i + offset) & 7] << 12;
99 for (j = 0; j < filterSize; j++)
100 t += src[j][i] * filter[j];
101 dest[i] = av_clip_uint8(t >> 19);
102 }
103}
104
105static void yuv2planeX_altivec(const int16_t *filter, int filterSize,
106 const int16_t **src, uint8_t *dest, int dstW,
107 const uint8_t *dither, int offset)
108{
109 int dst_u = -(uintptr_t)dest & 15;
110 int i;
111
112 yuv2planeX_u(filter, filterSize, src, dest, dst_u, dither, offset, 0);
113
114 for (i = dst_u; i < dstW - 15; i += 16)
115 yuv2planeX_16_altivec(filter, filterSize, src, dest + i, dither,
116 offset, i);
117
118 yuv2planeX_u(filter, filterSize, src, dest, dstW, dither, offset, i);
119}
120
121static void hScale_altivec_real(SwsContext *c, int16_t *dst, int dstW,
122 const uint8_t *src, const int16_t *filter,
123 const int32_t *filterPos, int filterSize)
124{
125 register int i;
126 DECLARE_ALIGNED(16, int, tempo)[4];
127
128 if (filterSize % 4) {
129 for (i = 0; i < dstW; i++) {
130 register int j;
131 register int srcPos = filterPos[i];
132 register int val = 0;
133 for (j = 0; j < filterSize; j++)
134 val += ((int)src[srcPos + j]) * filter[filterSize * i + j];
135 dst[i] = FFMIN(val >> 7, (1 << 15) - 1);
136 }
137 } else
138 switch (filterSize) {
139 case 4:
140 for (i = 0; i < dstW; i++) {
141 register int srcPos = filterPos[i];
142
143 vector unsigned char src_v0 = vec_ld(srcPos, src);
144 vector unsigned char src_v1, src_vF;
145 vector signed short src_v, filter_v;
146 vector signed int val_vEven, val_s;
147 if ((((uintptr_t)src + srcPos) % 16) > 12) {
148 src_v1 = vec_ld(srcPos + 16, src);
149 }
150 src_vF = vec_perm(src_v0, src_v1, vec_lvsl(srcPos, src));
151
152 src_v = // vec_unpackh sign-extends...
153 (vector signed short)(vec_mergeh((vector unsigned char)vzero, src_vF));
154 // now put our elements in the even slots
155 src_v = vec_mergeh(src_v, (vector signed short)vzero);
156
157 filter_v = vec_ld(i << 3, filter);
158 // The 3 above is 2 (filterSize == 4) + 1 (sizeof(short) == 2).
159
160 // The neat trick: We only care for half the elements,
161 // high or low depending on (i<<3)%16 (it's 0 or 8 here),
162 // and we're going to use vec_mule, so we choose
163 // carefully how to "unpack" the elements into the even slots.
164 if ((i << 3) % 16)
165 filter_v = vec_mergel(filter_v, (vector signed short)vzero);
166 else
167 filter_v = vec_mergeh(filter_v, (vector signed short)vzero);
168
169 val_vEven = vec_mule(src_v, filter_v);
170 val_s = vec_sums(val_vEven, vzero);
171 vec_st(val_s, 0, tempo);
172 dst[i] = FFMIN(tempo[3] >> 7, (1 << 15) - 1);
173 }
174 break;
175
176 case 8:
177 for (i = 0; i < dstW; i++) {
178 register int srcPos = filterPos[i];
179
180 vector unsigned char src_v0 = vec_ld(srcPos, src);
181 vector unsigned char src_v1, src_vF;
182 vector signed short src_v, filter_v;
183 vector signed int val_v, val_s;
184 if ((((uintptr_t)src + srcPos) % 16) > 8) {
185 src_v1 = vec_ld(srcPos + 16, src);
186 }
187 src_vF = vec_perm(src_v0, src_v1, vec_lvsl(srcPos, src));
188
189 src_v = // vec_unpackh sign-extends...
190 (vector signed short)(vec_mergeh((vector unsigned char)vzero, src_vF));
191 filter_v = vec_ld(i << 4, filter);
192 // the 4 above is 3 (filterSize == 8) + 1 (sizeof(short) == 2)
193
194 val_v = vec_msums(src_v, filter_v, (vector signed int)vzero);
195 val_s = vec_sums(val_v, vzero);
196 vec_st(val_s, 0, tempo);
197 dst[i] = FFMIN(tempo[3] >> 7, (1 << 15) - 1);
198 }
199 break;
200
201 case 16:
202 for (i = 0; i < dstW; i++) {
203 register int srcPos = filterPos[i];
204
205 vector unsigned char src_v0 = vec_ld(srcPos, src);
206 vector unsigned char src_v1 = vec_ld(srcPos + 16, src);
207 vector unsigned char src_vF = vec_perm(src_v0, src_v1, vec_lvsl(srcPos, src));
208
209 vector signed short src_vA = // vec_unpackh sign-extends...
210 (vector signed short)(vec_mergeh((vector unsigned char)vzero, src_vF));
211 vector signed short src_vB = // vec_unpackh sign-extends...
212 (vector signed short)(vec_mergel((vector unsigned char)vzero, src_vF));
213
214 vector signed short filter_v0 = vec_ld(i << 5, filter);
215 vector signed short filter_v1 = vec_ld((i << 5) + 16, filter);
216 // the 5 above are 4 (filterSize == 16) + 1 (sizeof(short) == 2)
217
218 vector signed int val_acc = vec_msums(src_vA, filter_v0, (vector signed int)vzero);
219 vector signed int val_v = vec_msums(src_vB, filter_v1, val_acc);
220
221 vector signed int val_s = vec_sums(val_v, vzero);
222
223 vec_st(val_s, 0, tempo);
224 dst[i] = FFMIN(tempo[3] >> 7, (1 << 15) - 1);
225 }
226 break;
227
228 default:
229 for (i = 0; i < dstW; i++) {
230 register int j;
231 register int srcPos = filterPos[i];
232
233 vector signed int val_s, val_v = (vector signed int)vzero;
234 vector signed short filter_v0R = vec_ld(i * 2 * filterSize, filter);
235 vector unsigned char permF = vec_lvsl((i * 2 * filterSize), filter);
236
237 vector unsigned char src_v0 = vec_ld(srcPos, src);
238 vector unsigned char permS = vec_lvsl(srcPos, src);
239
240 for (j = 0; j < filterSize - 15; j += 16) {
241 vector unsigned char src_v1 = vec_ld(srcPos + j + 16, src);
242 vector unsigned char src_vF = vec_perm(src_v0, src_v1, permS);
243
244 vector signed short src_vA = // vec_unpackh sign-extends...
245 (vector signed short)(vec_mergeh((vector unsigned char)vzero, src_vF));
246 vector signed short src_vB = // vec_unpackh sign-extends...
247 (vector signed short)(vec_mergel((vector unsigned char)vzero, src_vF));
248
249 vector signed short filter_v1R = vec_ld((i * 2 * filterSize) + (j * 2) + 16, filter);
250 vector signed short filter_v2R = vec_ld((i * 2 * filterSize) + (j * 2) + 32, filter);
251 vector signed short filter_v0 = vec_perm(filter_v0R, filter_v1R, permF);
252 vector signed short filter_v1 = vec_perm(filter_v1R, filter_v2R, permF);
253
254 vector signed int val_acc = vec_msums(src_vA, filter_v0, val_v);
255 val_v = vec_msums(src_vB, filter_v1, val_acc);
256
257 filter_v0R = filter_v2R;
258 src_v0 = src_v1;
259 }
260
261 if (j < filterSize - 7) {
262 // loading src_v0 is useless, it's already done above
263 // vector unsigned char src_v0 = vec_ld(srcPos + j, src);
264 vector unsigned char src_v1, src_vF;
265 vector signed short src_v, filter_v1R, filter_v;
266 if ((((uintptr_t)src + srcPos) % 16) > 8) {
267 src_v1 = vec_ld(srcPos + j + 16, src);
268 }
269 src_vF = vec_perm(src_v0, src_v1, permS);
270
271 src_v = // vec_unpackh sign-extends...
272 (vector signed short)(vec_mergeh((vector unsigned char)vzero, src_vF));
273 // loading filter_v0R is useless, it's already done above
274 // vector signed short filter_v0R = vec_ld((i * 2 * filterSize) + j, filter);
275 filter_v1R = vec_ld((i * 2 * filterSize) + (j * 2) + 16, filter);
276 filter_v = vec_perm(filter_v0R, filter_v1R, permF);
277
278 val_v = vec_msums(src_v, filter_v, val_v);
279 }
280
281 val_s = vec_sums(val_v, vzero);
282
283 vec_st(val_s, 0, tempo);
284 dst[i] = FFMIN(tempo[3] >> 7, (1 << 15) - 1);
285 }
286 }
287}
288#endif /* HAVE_ALTIVEC */
289
290av_cold void ff_sws_init_swscale_ppc(SwsContext *c)
291{
292#if HAVE_ALTIVEC
293 enum AVPixelFormat dstFormat = c->dstFormat;
294
295 if (!(av_get_cpu_flags() & AV_CPU_FLAG_ALTIVEC))
296 return;
297
298 if (c->srcBpc == 8 && c->dstBpc <= 14) {
299 c->hyScale = c->hcScale = hScale_altivec_real;
300 }
301 if (!is16BPS(dstFormat) && !is9_OR_10BPS(dstFormat) &&
302 dstFormat != AV_PIX_FMT_NV12 && dstFormat != AV_PIX_FMT_NV21 &&
303 !c->alpPixBuf) {
304 c->yuv2planeX = yuv2planeX_altivec;
305 }
306
307 /* The following list of supported dstFormat values should
308 * match what's found in the body of ff_yuv2packedX_altivec() */
309 if (!(c->flags & (SWS_BITEXACT | SWS_FULL_CHR_H_INT)) && !c->alpPixBuf) {
310 switch (c->dstFormat) {
311 case AV_PIX_FMT_ABGR:
312 c->yuv2packedX = ff_yuv2abgr_X_altivec;
313 break;
314 case AV_PIX_FMT_BGRA:
315 c->yuv2packedX = ff_yuv2bgra_X_altivec;
316 break;
317 case AV_PIX_FMT_ARGB:
318 c->yuv2packedX = ff_yuv2argb_X_altivec;
319 break;
320 case AV_PIX_FMT_RGBA:
321 c->yuv2packedX = ff_yuv2rgba_X_altivec;
322 break;
323 case AV_PIX_FMT_BGR24:
324 c->yuv2packedX = ff_yuv2bgr24_X_altivec;
325 break;
326 case AV_PIX_FMT_RGB24:
327 c->yuv2packedX = ff_yuv2rgb24_X_altivec;
328 break;
329 }
330 }
331#endif /* HAVE_ALTIVEC */
332}
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