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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 "libavutil/attributes.h"
23 #include "libavutil/ppc/types_altivec.h"
24 #include "libavutil/ppc/util_altivec.h"
25 #include "libavcodec/vc1dsp.h"
26 
27 // main steps of 8x8 transform
28 #define STEP8(s0, s1, s2, s3, s4, s5, s6, s7, vec_rnd) \
29 do { \
30  t0 = vec_sl(vec_add(s0, s4), vec_2); \
31  t0 = vec_add(vec_sl(t0, vec_1), t0); \
32  t0 = vec_add(t0, vec_rnd); \
33  t1 = vec_sl(vec_sub(s0, s4), vec_2); \
34  t1 = vec_add(vec_sl(t1, vec_1), t1); \
35  t1 = vec_add(t1, vec_rnd); \
36  t2 = vec_add(vec_sl(s6, vec_2), vec_sl(s6, vec_1)); \
37  t2 = vec_add(t2, vec_sl(s2, vec_4)); \
38  t3 = vec_add(vec_sl(s2, vec_2), vec_sl(s2, vec_1)); \
39  t3 = vec_sub(t3, vec_sl(s6, vec_4)); \
40  t4 = vec_add(t0, t2); \
41  t5 = vec_add(t1, t3); \
42  t6 = vec_sub(t1, t3); \
43  t7 = vec_sub(t0, t2); \
44 \
45  t0 = vec_sl(vec_add(s1, s3), vec_4); \
46  t0 = vec_add(t0, vec_sl(s5, vec_3)); \
47  t0 = vec_add(t0, vec_sl(s7, vec_2)); \
48  t0 = vec_add(t0, vec_sub(s5, s3)); \
49 \
50  t1 = vec_sl(vec_sub(s1, s5), vec_4); \
51  t1 = vec_sub(t1, vec_sl(s7, vec_3)); \
52  t1 = vec_sub(t1, vec_sl(s3, vec_2)); \
53  t1 = vec_sub(t1, vec_add(s1, s7)); \
54 \
55  t2 = vec_sl(vec_sub(s7, s3), vec_4); \
56  t2 = vec_add(t2, vec_sl(s1, vec_3)); \
57  t2 = vec_add(t2, vec_sl(s5, vec_2)); \
58  t2 = vec_add(t2, vec_sub(s1, s7)); \
59 \
60  t3 = vec_sl(vec_sub(s5, s7), vec_4); \
61  t3 = vec_sub(t3, vec_sl(s3, vec_3)); \
62  t3 = vec_add(t3, vec_sl(s1, vec_2)); \
63  t3 = vec_sub(t3, vec_add(s3, s5)); \
64 \
65  s0 = vec_add(t4, t0); \
66  s1 = vec_add(t5, t1); \
67  s2 = vec_add(t6, t2); \
68  s3 = vec_add(t7, t3); \
69  s4 = vec_sub(t7, t3); \
70  s5 = vec_sub(t6, t2); \
71  s6 = vec_sub(t5, t1); \
72  s7 = vec_sub(t4, t0); \
73 }while(0)
74 
75 #define SHIFT_HOR8(s0, s1, s2, s3, s4, s5, s6, s7) \
76 do { \
77  s0 = vec_sra(s0, vec_3); \
78  s1 = vec_sra(s1, vec_3); \
79  s2 = vec_sra(s2, vec_3); \
80  s3 = vec_sra(s3, vec_3); \
81  s4 = vec_sra(s4, vec_3); \
82  s5 = vec_sra(s5, vec_3); \
83  s6 = vec_sra(s6, vec_3); \
84  s7 = vec_sra(s7, vec_3); \
85 }while(0)
86 
87 #define SHIFT_VERT8(s0, s1, s2, s3, s4, s5, s6, s7) \
88 do { \
89  s0 = vec_sra(s0, vec_7); \
90  s1 = vec_sra(s1, vec_7); \
91  s2 = vec_sra(s2, vec_7); \
92  s3 = vec_sra(s3, vec_7); \
93  s4 = vec_sra(vec_add(s4, vec_1s), vec_7); \
94  s5 = vec_sra(vec_add(s5, vec_1s), vec_7); \
95  s6 = vec_sra(vec_add(s6, vec_1s), vec_7); \
96  s7 = vec_sra(vec_add(s7, vec_1s), vec_7); \
97 }while(0)
98 
99 /* main steps of 4x4 transform */
100 #define STEP4(s0, s1, s2, s3, vec_rnd) \
101 do { \
102  t1 = vec_add(vec_sl(s0, vec_4), s0); \
103  t1 = vec_add(t1, vec_rnd); \
104  t2 = vec_add(vec_sl(s2, vec_4), s2); \
105  t0 = vec_add(t1, t2); \
106  t1 = vec_sub(t1, t2); \
107  t3 = vec_sl(vec_sub(s3, s1), vec_1); \
108  t3 = vec_add(t3, vec_sl(t3, vec_2)); \
109  t2 = vec_add(t3, vec_sl(s1, vec_5)); \
110  t3 = vec_add(t3, vec_sl(s3, vec_3)); \
111  t3 = vec_add(t3, vec_sl(s3, vec_2)); \
112  s0 = vec_add(t0, t2); \
113  s1 = vec_sub(t1, t3); \
114  s2 = vec_add(t1, t3); \
115  s3 = vec_sub(t0, t2); \
116 }while (0)
117 
118 #define SHIFT_HOR4(s0, s1, s2, s3) \
119  s0 = vec_sra(s0, vec_3); \
120  s1 = vec_sra(s1, vec_3); \
121  s2 = vec_sra(s2, vec_3); \
122  s3 = vec_sra(s3, vec_3);
123 
124 #define SHIFT_VERT4(s0, s1, s2, s3) \
125  s0 = vec_sra(s0, vec_7); \
126  s1 = vec_sra(s1, vec_7); \
127  s2 = vec_sra(s2, vec_7); \
128  s3 = vec_sra(s3, vec_7);
129 
130 /** Do inverse transform on 8x8 block
131 */
132 static void vc1_inv_trans_8x8_altivec(int16_t block[64])
133 {
134  vector signed short src0, src1, src2, src3, src4, src5, src6, src7;
135  vector signed int s0, s1, s2, s3, s4, s5, s6, s7;
136  vector signed int s8, s9, sA, sB, sC, sD, sE, sF;
137  vector signed int t0, t1, t2, t3, t4, t5, t6, t7;
138  const vector signed int vec_64 = vec_sl(vec_splat_s32(4), vec_splat_u32(4));
139  const vector unsigned int vec_7 = vec_splat_u32(7);
140  const vector unsigned int vec_4 = vec_splat_u32(4);
141  const vector signed int vec_4s = vec_splat_s32(4);
142  const vector unsigned int vec_3 = vec_splat_u32(3);
143  const vector unsigned int vec_2 = vec_splat_u32(2);
144  const vector signed int vec_1s = vec_splat_s32(1);
145  const vector unsigned int vec_1 = vec_splat_u32(1);
146 
147  src0 = vec_ld( 0, block);
148  src1 = vec_ld( 16, block);
149  src2 = vec_ld( 32, block);
150  src3 = vec_ld( 48, block);
151  src4 = vec_ld( 64, block);
152  src5 = vec_ld( 80, block);
153  src6 = vec_ld( 96, block);
154  src7 = vec_ld(112, block);
155 
156  s0 = vec_unpackl(src0);
157  s1 = vec_unpackl(src1);
158  s2 = vec_unpackl(src2);
159  s3 = vec_unpackl(src3);
160  s4 = vec_unpackl(src4);
161  s5 = vec_unpackl(src5);
162  s6 = vec_unpackl(src6);
163  s7 = vec_unpackl(src7);
164  s8 = vec_unpackh(src0);
165  s9 = vec_unpackh(src1);
166  sA = vec_unpackh(src2);
167  sB = vec_unpackh(src3);
168  sC = vec_unpackh(src4);
169  sD = vec_unpackh(src5);
170  sE = vec_unpackh(src6);
171  sF = vec_unpackh(src7);
172  STEP8(s0, s1, s2, s3, s4, s5, s6, s7, vec_4s);
173  SHIFT_HOR8(s0, s1, s2, s3, s4, s5, s6, s7);
174  STEP8(s8, s9, sA, sB, sC, sD, sE, sF, vec_4s);
175  SHIFT_HOR8(s8, s9, sA, sB, sC, sD, sE, sF);
176  src0 = vec_pack(s8, s0);
177  src1 = vec_pack(s9, s1);
178  src2 = vec_pack(sA, s2);
179  src3 = vec_pack(sB, s3);
180  src4 = vec_pack(sC, s4);
181  src5 = vec_pack(sD, s5);
182  src6 = vec_pack(sE, s6);
183  src7 = vec_pack(sF, s7);
184  TRANSPOSE8(src0, src1, src2, src3, src4, src5, src6, src7);
185 
186  s0 = vec_unpackl(src0);
187  s1 = vec_unpackl(src1);
188  s2 = vec_unpackl(src2);
189  s3 = vec_unpackl(src3);
190  s4 = vec_unpackl(src4);
191  s5 = vec_unpackl(src5);
192  s6 = vec_unpackl(src6);
193  s7 = vec_unpackl(src7);
194  s8 = vec_unpackh(src0);
195  s9 = vec_unpackh(src1);
196  sA = vec_unpackh(src2);
197  sB = vec_unpackh(src3);
198  sC = vec_unpackh(src4);
199  sD = vec_unpackh(src5);
200  sE = vec_unpackh(src6);
201  sF = vec_unpackh(src7);
202  STEP8(s0, s1, s2, s3, s4, s5, s6, s7, vec_64);
203  SHIFT_VERT8(s0, s1, s2, s3, s4, s5, s6, s7);
204  STEP8(s8, s9, sA, sB, sC, sD, sE, sF, vec_64);
205  SHIFT_VERT8(s8, s9, sA, sB, sC, sD, sE, sF);
206  src0 = vec_pack(s8, s0);
207  src1 = vec_pack(s9, s1);
208  src2 = vec_pack(sA, s2);
209  src3 = vec_pack(sB, s3);
210  src4 = vec_pack(sC, s4);
211  src5 = vec_pack(sD, s5);
212  src6 = vec_pack(sE, s6);
213  src7 = vec_pack(sF, s7);
214 
215  vec_st(src0, 0, block);
216  vec_st(src1, 16, block);
217  vec_st(src2, 32, block);
218  vec_st(src3, 48, block);
219  vec_st(src4, 64, block);
220  vec_st(src5, 80, block);
221  vec_st(src6, 96, block);
222  vec_st(src7,112, block);
223 }
224 
225 /** Do inverse transform on 8x4 part of block
226 */
227 static void vc1_inv_trans_8x4_altivec(uint8_t *dest, int stride, int16_t *block)
228 {
229  vector signed short src0, src1, src2, src3, src4, src5, src6, src7;
230  vector signed int s0, s1, s2, s3, s4, s5, s6, s7;
231  vector signed int s8, s9, sA, sB, sC, sD, sE, sF;
232  vector signed int t0, t1, t2, t3, t4, t5, t6, t7;
233  const vector signed int vec_64 = vec_sl(vec_splat_s32(4), vec_splat_u32(4));
234  const vector unsigned int vec_7 = vec_splat_u32(7);
235  const vector unsigned int vec_5 = vec_splat_u32(5);
236  const vector unsigned int vec_4 = vec_splat_u32(4);
237  const vector signed int vec_4s = vec_splat_s32(4);
238  const vector unsigned int vec_3 = vec_splat_u32(3);
239  const vector unsigned int vec_2 = vec_splat_u32(2);
240  const vector unsigned int vec_1 = vec_splat_u32(1);
241  vector unsigned char tmp;
242  vector signed short tmp2, tmp3;
243  vector unsigned char perm0, perm1, p0, p1, p;
244 
245  src0 = vec_ld( 0, block);
246  src1 = vec_ld( 16, block);
247  src2 = vec_ld( 32, block);
248  src3 = vec_ld( 48, block);
249  src4 = vec_ld( 64, block);
250  src5 = vec_ld( 80, block);
251  src6 = vec_ld( 96, block);
252  src7 = vec_ld(112, block);
253 
254  TRANSPOSE8(src0, src1, src2, src3, src4, src5, src6, src7);
255  s0 = vec_unpackl(src0);
256  s1 = vec_unpackl(src1);
257  s2 = vec_unpackl(src2);
258  s3 = vec_unpackl(src3);
259  s4 = vec_unpackl(src4);
260  s5 = vec_unpackl(src5);
261  s6 = vec_unpackl(src6);
262  s7 = vec_unpackl(src7);
263  s8 = vec_unpackh(src0);
264  s9 = vec_unpackh(src1);
265  sA = vec_unpackh(src2);
266  sB = vec_unpackh(src3);
267  sC = vec_unpackh(src4);
268  sD = vec_unpackh(src5);
269  sE = vec_unpackh(src6);
270  sF = vec_unpackh(src7);
271  STEP8(s0, s1, s2, s3, s4, s5, s6, s7, vec_4s);
272  SHIFT_HOR8(s0, s1, s2, s3, s4, s5, s6, s7);
273  STEP8(s8, s9, sA, sB, sC, sD, sE, sF, vec_4s);
274  SHIFT_HOR8(s8, s9, sA, sB, sC, sD, sE, sF);
275  src0 = vec_pack(s8, s0);
276  src1 = vec_pack(s9, s1);
277  src2 = vec_pack(sA, s2);
278  src3 = vec_pack(sB, s3);
279  src4 = vec_pack(sC, s4);
280  src5 = vec_pack(sD, s5);
281  src6 = vec_pack(sE, s6);
282  src7 = vec_pack(sF, s7);
283  TRANSPOSE8(src0, src1, src2, src3, src4, src5, src6, src7);
284 
285  s0 = vec_unpackh(src0);
286  s1 = vec_unpackh(src1);
287  s2 = vec_unpackh(src2);
288  s3 = vec_unpackh(src3);
289  s8 = vec_unpackl(src0);
290  s9 = vec_unpackl(src1);
291  sA = vec_unpackl(src2);
292  sB = vec_unpackl(src3);
293  STEP4(s0, s1, s2, s3, vec_64);
294  SHIFT_VERT4(s0, s1, s2, s3);
295  STEP4(s8, s9, sA, sB, vec_64);
296  SHIFT_VERT4(s8, s9, sA, sB);
297  src0 = vec_pack(s0, s8);
298  src1 = vec_pack(s1, s9);
299  src2 = vec_pack(s2, sA);
300  src3 = vec_pack(s3, sB);
301 
302  p0 = vec_lvsl (0, dest);
303  p1 = vec_lvsl (stride, dest);
304  p = vec_splat_u8 (-1);
305  perm0 = vec_mergeh (p, p0);
306  perm1 = vec_mergeh (p, p1);
307 
308 #define ADD(dest,src,perm) \
309  /* *(uint64_t *)&tmp = *(uint64_t *)dest; */ \
310  tmp = vec_ld (0, dest); \
311  tmp2 = (vector signed short)vec_perm (tmp, vec_splat_u8(0), perm); \
312  tmp3 = vec_adds (tmp2, src); \
313  tmp = vec_packsu (tmp3, tmp3); \
314  vec_ste ((vector unsigned int)tmp, 0, (unsigned int *)dest); \
315  vec_ste ((vector unsigned int)tmp, 4, (unsigned int *)dest);
316 
317  ADD (dest, src0, perm0) dest += stride;
318  ADD (dest, src1, perm1) dest += stride;
319  ADD (dest, src2, perm0) dest += stride;
320  ADD (dest, src3, perm1)
321 }
322 
323 #define PUT_OP_U8_ALTIVEC(d, s, dst) d = s
324 #define AVG_OP_U8_ALTIVEC(d, s, dst) d = vec_avg(dst, s)
325 
326 #define OP_U8_ALTIVEC PUT_OP_U8_ALTIVEC
327 #define PREFIX_no_rnd_vc1_chroma_mc8_altivec put_no_rnd_vc1_chroma_mc8_altivec
328 #include "h264chroma_template.c"
329 #undef OP_U8_ALTIVEC
330 #undef PREFIX_no_rnd_vc1_chroma_mc8_altivec
331 
332 #define OP_U8_ALTIVEC AVG_OP_U8_ALTIVEC
333 #define PREFIX_no_rnd_vc1_chroma_mc8_altivec avg_no_rnd_vc1_chroma_mc8_altivec
334 #include "h264chroma_template.c"
335 #undef OP_U8_ALTIVEC
336 #undef PREFIX_no_rnd_vc1_chroma_mc8_altivec
337 
338 av_cold void ff_vc1dsp_init_altivec(VC1DSPContext *dsp)
339 {
340  if (!(av_get_cpu_flags() & AV_CPU_FLAG_ALTIVEC))
341  return;
342 
343  dsp->vc1_inv_trans_8x8 = vc1_inv_trans_8x8_altivec;
344  dsp->vc1_inv_trans_8x4 = vc1_inv_trans_8x4_altivec;
345  dsp->put_no_rnd_vc1_chroma_pixels_tab[0] = put_no_rnd_vc1_chroma_mc8_altivec;
346  dsp->avg_no_rnd_vc1_chroma_pixels_tab[0] = avg_no_rnd_vc1_chroma_mc8_altivec;
347 }
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