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