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vc1dsp_altivec.c
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1 /*
2  * VC-1 and WMV3 decoder - DSP functions AltiVec-optimized
3  * Copyright (c) 2006 Konstantin Shishkov
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include "config.h"
23 #include "libavutil/attributes.h"
24 #include "libavutil/cpu.h"
25 #include "libavutil/ppc/cpu.h"
26 #include "libavutil/ppc/types_altivec.h"
27 #include "libavutil/ppc/util_altivec.h"
28 #include "libavcodec/vc1dsp.h"
29 
30 #if HAVE_ALTIVEC
31 
32 // main steps of 8x8 transform
33 #define STEP8(s0, s1, s2, s3, s4, s5, s6, s7, vec_rnd) \
34 do { \
35  t0 = vec_sl(vec_add(s0, s4), vec_2); \
36  t0 = vec_add(vec_sl(t0, vec_1), t0); \
37  t0 = vec_add(t0, vec_rnd); \
38  t1 = vec_sl(vec_sub(s0, s4), vec_2); \
39  t1 = vec_add(vec_sl(t1, vec_1), t1); \
40  t1 = vec_add(t1, vec_rnd); \
41  t2 = vec_add(vec_sl(s6, vec_2), vec_sl(s6, vec_1)); \
42  t2 = vec_add(t2, vec_sl(s2, vec_4)); \
43  t3 = vec_add(vec_sl(s2, vec_2), vec_sl(s2, vec_1)); \
44  t3 = vec_sub(t3, vec_sl(s6, vec_4)); \
45  t4 = vec_add(t0, t2); \
46  t5 = vec_add(t1, t3); \
47  t6 = vec_sub(t1, t3); \
48  t7 = vec_sub(t0, t2); \
49 \
50  t0 = vec_sl(vec_add(s1, s3), vec_4); \
51  t0 = vec_add(t0, vec_sl(s5, vec_3)); \
52  t0 = vec_add(t0, vec_sl(s7, vec_2)); \
53  t0 = vec_add(t0, vec_sub(s5, s3)); \
54 \
55  t1 = vec_sl(vec_sub(s1, s5), vec_4); \
56  t1 = vec_sub(t1, vec_sl(s7, vec_3)); \
57  t1 = vec_sub(t1, vec_sl(s3, vec_2)); \
58  t1 = vec_sub(t1, vec_add(s1, s7)); \
59 \
60  t2 = vec_sl(vec_sub(s7, s3), vec_4); \
61  t2 = vec_add(t2, vec_sl(s1, vec_3)); \
62  t2 = vec_add(t2, vec_sl(s5, vec_2)); \
63  t2 = vec_add(t2, vec_sub(s1, s7)); \
64 \
65  t3 = vec_sl(vec_sub(s5, s7), vec_4); \
66  t3 = vec_sub(t3, vec_sl(s3, vec_3)); \
67  t3 = vec_add(t3, vec_sl(s1, vec_2)); \
68  t3 = vec_sub(t3, vec_add(s3, s5)); \
69 \
70  s0 = vec_add(t4, t0); \
71  s1 = vec_add(t5, t1); \
72  s2 = vec_add(t6, t2); \
73  s3 = vec_add(t7, t3); \
74  s4 = vec_sub(t7, t3); \
75  s5 = vec_sub(t6, t2); \
76  s6 = vec_sub(t5, t1); \
77  s7 = vec_sub(t4, t0); \
78 }while(0)
79 
80 #define SHIFT_HOR8(s0, s1, s2, s3, s4, s5, s6, s7) \
81 do { \
82  s0 = vec_sra(s0, vec_3); \
83  s1 = vec_sra(s1, vec_3); \
84  s2 = vec_sra(s2, vec_3); \
85  s3 = vec_sra(s3, vec_3); \
86  s4 = vec_sra(s4, vec_3); \
87  s5 = vec_sra(s5, vec_3); \
88  s6 = vec_sra(s6, vec_3); \
89  s7 = vec_sra(s7, vec_3); \
90 }while(0)
91 
92 #define SHIFT_VERT8(s0, s1, s2, s3, s4, s5, s6, s7) \
93 do { \
94  s0 = vec_sra(s0, vec_7); \
95  s1 = vec_sra(s1, vec_7); \
96  s2 = vec_sra(s2, vec_7); \
97  s3 = vec_sra(s3, vec_7); \
98  s4 = vec_sra(vec_add(s4, vec_1s), vec_7); \
99  s5 = vec_sra(vec_add(s5, vec_1s), vec_7); \
100  s6 = vec_sra(vec_add(s6, vec_1s), vec_7); \
101  s7 = vec_sra(vec_add(s7, vec_1s), vec_7); \
102 }while(0)
103 
104 /* main steps of 4x4 transform */
105 #define STEP4(s0, s1, s2, s3, vec_rnd) \
106 do { \
107  t1 = vec_add(vec_sl(s0, vec_4), s0); \
108  t1 = vec_add(t1, vec_rnd); \
109  t2 = vec_add(vec_sl(s2, vec_4), s2); \
110  t0 = vec_add(t1, t2); \
111  t1 = vec_sub(t1, t2); \
112  t3 = vec_sl(vec_sub(s3, s1), vec_1); \
113  t3 = vec_add(t3, vec_sl(t3, vec_2)); \
114  t2 = vec_add(t3, vec_sl(s1, vec_5)); \
115  t3 = vec_add(t3, vec_sl(s3, vec_3)); \
116  t3 = vec_add(t3, vec_sl(s3, vec_2)); \
117  s0 = vec_add(t0, t2); \
118  s1 = vec_sub(t1, t3); \
119  s2 = vec_add(t1, t3); \
120  s3 = vec_sub(t0, t2); \
121 }while (0)
122 
123 #define SHIFT_HOR4(s0, s1, s2, s3) \
124  s0 = vec_sra(s0, vec_3); \
125  s1 = vec_sra(s1, vec_3); \
126  s2 = vec_sra(s2, vec_3); \
127  s3 = vec_sra(s3, vec_3);
128 
129 #define SHIFT_VERT4(s0, s1, s2, s3) \
130  s0 = vec_sra(s0, vec_7); \
131  s1 = vec_sra(s1, vec_7); \
132  s2 = vec_sra(s2, vec_7); \
133  s3 = vec_sra(s3, vec_7);
134 
135 /** Do inverse transform on 8x8 block
136 */
137 static void vc1_inv_trans_8x8_altivec(int16_t block[64])
138 {
139  vector signed short src0, src1, src2, src3, src4, src5, src6, src7;
140  vector signed int s0, s1, s2, s3, s4, s5, s6, s7;
141  vector signed int s8, s9, sA, sB, sC, sD, sE, sF;
142  vector signed int t0, t1, t2, t3, t4, t5, t6, t7;
143  const vector signed int vec_64 = vec_sl(vec_splat_s32(4), vec_splat_u32(4));
144  const vector unsigned int vec_7 = vec_splat_u32(7);
145  const vector unsigned int vec_4 = vec_splat_u32(4);
146  const vector signed int vec_4s = vec_splat_s32(4);
147  const vector unsigned int vec_3 = vec_splat_u32(3);
148  const vector unsigned int vec_2 = vec_splat_u32(2);
149  const vector signed int vec_1s = vec_splat_s32(1);
150  const vector unsigned int vec_1 = vec_splat_u32(1);
151 
152  src0 = vec_ld( 0, block);
153  src1 = vec_ld( 16, block);
154  src2 = vec_ld( 32, block);
155  src3 = vec_ld( 48, block);
156  src4 = vec_ld( 64, block);
157  src5 = vec_ld( 80, block);
158  src6 = vec_ld( 96, block);
159  src7 = vec_ld(112, block);
160 
161  s0 = vec_unpackl(src0);
162  s1 = vec_unpackl(src1);
163  s2 = vec_unpackl(src2);
164  s3 = vec_unpackl(src3);
165  s4 = vec_unpackl(src4);
166  s5 = vec_unpackl(src5);
167  s6 = vec_unpackl(src6);
168  s7 = vec_unpackl(src7);
169  s8 = vec_unpackh(src0);
170  s9 = vec_unpackh(src1);
171  sA = vec_unpackh(src2);
172  sB = vec_unpackh(src3);
173  sC = vec_unpackh(src4);
174  sD = vec_unpackh(src5);
175  sE = vec_unpackh(src6);
176  sF = vec_unpackh(src7);
177  STEP8(s0, s1, s2, s3, s4, s5, s6, s7, vec_4s);
178  SHIFT_HOR8(s0, s1, s2, s3, s4, s5, s6, s7);
179  STEP8(s8, s9, sA, sB, sC, sD, sE, sF, vec_4s);
180  SHIFT_HOR8(s8, s9, sA, sB, sC, sD, sE, sF);
181  src0 = vec_pack(s8, s0);
182  src1 = vec_pack(s9, s1);
183  src2 = vec_pack(sA, s2);
184  src3 = vec_pack(sB, s3);
185  src4 = vec_pack(sC, s4);
186  src5 = vec_pack(sD, s5);
187  src6 = vec_pack(sE, s6);
188  src7 = vec_pack(sF, s7);
189  TRANSPOSE8(src0, src1, src2, src3, src4, src5, src6, src7);
190 
191  s0 = vec_unpackl(src0);
192  s1 = vec_unpackl(src1);
193  s2 = vec_unpackl(src2);
194  s3 = vec_unpackl(src3);
195  s4 = vec_unpackl(src4);
196  s5 = vec_unpackl(src5);
197  s6 = vec_unpackl(src6);
198  s7 = vec_unpackl(src7);
199  s8 = vec_unpackh(src0);
200  s9 = vec_unpackh(src1);
201  sA = vec_unpackh(src2);
202  sB = vec_unpackh(src3);
203  sC = vec_unpackh(src4);
204  sD = vec_unpackh(src5);
205  sE = vec_unpackh(src6);
206  sF = vec_unpackh(src7);
207  STEP8(s0, s1, s2, s3, s4, s5, s6, s7, vec_64);
208  SHIFT_VERT8(s0, s1, s2, s3, s4, s5, s6, s7);
209  STEP8(s8, s9, sA, sB, sC, sD, sE, sF, vec_64);
210  SHIFT_VERT8(s8, s9, sA, sB, sC, sD, sE, sF);
211  src0 = vec_pack(s8, s0);
212  src1 = vec_pack(s9, s1);
213  src2 = vec_pack(sA, s2);
214  src3 = vec_pack(sB, s3);
215  src4 = vec_pack(sC, s4);
216  src5 = vec_pack(sD, s5);
217  src6 = vec_pack(sE, s6);
218  src7 = vec_pack(sF, s7);
219 
220  vec_st(src0, 0, block);
221  vec_st(src1, 16, block);
222  vec_st(src2, 32, block);
223  vec_st(src3, 48, block);
224  vec_st(src4, 64, block);
225  vec_st(src5, 80, block);
226  vec_st(src6, 96, block);
227  vec_st(src7,112, block);
228 }
229 
230 /** Do inverse transform on 8x4 part of block
231 */
232 static void vc1_inv_trans_8x4_altivec(uint8_t *dest, int stride, int16_t *block)
233 {
234  vector signed short src0, src1, src2, src3, src4, src5, src6, src7;
235  vector signed int s0, s1, s2, s3, s4, s5, s6, s7;
236  vector signed int s8, s9, sA, sB, sC, sD, sE, sF;
237  vector signed int t0, t1, t2, t3, t4, t5, t6, t7;
238  const vector signed int vec_64 = vec_sl(vec_splat_s32(4), vec_splat_u32(4));
239  const vector unsigned int vec_7 = vec_splat_u32(7);
240  const vector unsigned int vec_5 = vec_splat_u32(5);
241  const vector unsigned int vec_4 = vec_splat_u32(4);
242  const vector signed int vec_4s = vec_splat_s32(4);
243  const vector unsigned int vec_3 = vec_splat_u32(3);
244  const vector unsigned int vec_2 = vec_splat_u32(2);
245  const vector unsigned int vec_1 = vec_splat_u32(1);
246  vector unsigned char tmp;
247  vector signed short tmp2, tmp3;
248  vector unsigned char perm0, perm1, p0, p1, p;
249 
250  src0 = vec_ld( 0, block);
251  src1 = vec_ld( 16, block);
252  src2 = vec_ld( 32, block);
253  src3 = vec_ld( 48, block);
254  src4 = vec_ld( 64, block);
255  src5 = vec_ld( 80, block);
256  src6 = vec_ld( 96, block);
257  src7 = vec_ld(112, block);
258 
259  TRANSPOSE8(src0, src1, src2, src3, src4, src5, src6, src7);
260  s0 = vec_unpackl(src0);
261  s1 = vec_unpackl(src1);
262  s2 = vec_unpackl(src2);
263  s3 = vec_unpackl(src3);
264  s4 = vec_unpackl(src4);
265  s5 = vec_unpackl(src5);
266  s6 = vec_unpackl(src6);
267  s7 = vec_unpackl(src7);
268  s8 = vec_unpackh(src0);
269  s9 = vec_unpackh(src1);
270  sA = vec_unpackh(src2);
271  sB = vec_unpackh(src3);
272  sC = vec_unpackh(src4);
273  sD = vec_unpackh(src5);
274  sE = vec_unpackh(src6);
275  sF = vec_unpackh(src7);
276  STEP8(s0, s1, s2, s3, s4, s5, s6, s7, vec_4s);
277  SHIFT_HOR8(s0, s1, s2, s3, s4, s5, s6, s7);
278  STEP8(s8, s9, sA, sB, sC, sD, sE, sF, vec_4s);
279  SHIFT_HOR8(s8, s9, sA, sB, sC, sD, sE, sF);
280  src0 = vec_pack(s8, s0);
281  src1 = vec_pack(s9, s1);
282  src2 = vec_pack(sA, s2);
283  src3 = vec_pack(sB, s3);
284  src4 = vec_pack(sC, s4);
285  src5 = vec_pack(sD, s5);
286  src6 = vec_pack(sE, s6);
287  src7 = vec_pack(sF, s7);
288  TRANSPOSE8(src0, src1, src2, src3, src4, src5, src6, src7);
289 
290  s0 = vec_unpackh(src0);
291  s1 = vec_unpackh(src1);
292  s2 = vec_unpackh(src2);
293  s3 = vec_unpackh(src3);
294  s8 = vec_unpackl(src0);
295  s9 = vec_unpackl(src1);
296  sA = vec_unpackl(src2);
297  sB = vec_unpackl(src3);
298  STEP4(s0, s1, s2, s3, vec_64);
299  SHIFT_VERT4(s0, s1, s2, s3);
300  STEP4(s8, s9, sA, sB, vec_64);
301  SHIFT_VERT4(s8, s9, sA, sB);
302  src0 = vec_pack(s0, s8);
303  src1 = vec_pack(s1, s9);
304  src2 = vec_pack(s2, sA);
305  src3 = vec_pack(s3, sB);
306 
307  p0 = vec_lvsl (0, dest);
308  p1 = vec_lvsl (stride, dest);
309  p = vec_splat_u8 (-1);
310  perm0 = vec_mergeh (p, p0);
311  perm1 = vec_mergeh (p, p1);
312 
313 #define ADD(dest,src,perm) \
314  /* *(uint64_t *)&tmp = *(uint64_t *)dest; */ \
315  tmp = vec_ld (0, dest); \
316  tmp2 = (vector signed short)vec_perm (tmp, vec_splat_u8(0), perm); \
317  tmp3 = vec_adds (tmp2, src); \
318  tmp = vec_packsu (tmp3, tmp3); \
319  vec_ste ((vector unsigned int)tmp, 0, (unsigned int *)dest); \
320  vec_ste ((vector unsigned int)tmp, 4, (unsigned int *)dest);
321 
322  ADD (dest, src0, perm0) dest += stride;
323  ADD (dest, src1, perm1) dest += stride;
324  ADD (dest, src2, perm0) dest += stride;
325  ADD (dest, src3, perm1)
326 }
327 
328 #define PUT_OP_U8_ALTIVEC(d, s, dst) d = s
329 #define AVG_OP_U8_ALTIVEC(d, s, dst) d = vec_avg(dst, s)
330 
331 #define OP_U8_ALTIVEC PUT_OP_U8_ALTIVEC
332 #define PREFIX_no_rnd_vc1_chroma_mc8_altivec put_no_rnd_vc1_chroma_mc8_altivec
333 #include "h264chroma_template.c"
334 #undef OP_U8_ALTIVEC
335 #undef PREFIX_no_rnd_vc1_chroma_mc8_altivec
336 
337 #define OP_U8_ALTIVEC AVG_OP_U8_ALTIVEC
338 #define PREFIX_no_rnd_vc1_chroma_mc8_altivec avg_no_rnd_vc1_chroma_mc8_altivec
339 #include "h264chroma_template.c"
340 #undef OP_U8_ALTIVEC
341 #undef PREFIX_no_rnd_vc1_chroma_mc8_altivec
342 
343 #endif /* HAVE_ALTIVEC */
344 
345 av_cold void ff_vc1dsp_init_ppc(VC1DSPContext *dsp)
346 {
347 #if HAVE_ALTIVEC
348  if (!PPC_ALTIVEC(av_get_cpu_flags()))
349  return;
350 
351  dsp->vc1_inv_trans_8x8 = vc1_inv_trans_8x8_altivec;
352  dsp->vc1_inv_trans_8x4 = vc1_inv_trans_8x4_altivec;
353  dsp->put_no_rnd_vc1_chroma_pixels_tab[0] = put_no_rnd_vc1_chroma_mc8_altivec;
354  dsp->avg_no_rnd_vc1_chroma_pixels_tab[0] = avg_no_rnd_vc1_chroma_mc8_altivec;
355 #endif /* HAVE_ALTIVEC */
356 }
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