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
24 #include "libavutil/attributes.h"
25 #include "libavutil/cpu.h"
26 #include "libavutil/ppc/cpu.h"
27 #include "libavutil/ppc/util_altivec.h"
28
29 #include "libavcodec/vc1dsp.h"
30
31 #if HAVE_ALTIVEC
32
33 // main steps of 8x8 transform
34 #define STEP8(s0, s1, s2, s3, s4, s5, s6, s7, vec_rnd) \
35 do { \
36 t0 = vec_sl(vec_add(s0, s4), vec_2); \
37 t0 = vec_add(vec_sl(t0, vec_1), t0); \
38 t0 = vec_add(t0, vec_rnd); \
39 t1 = vec_sl(vec_sub(s0, s4), vec_2); \
40 t1 = vec_add(vec_sl(t1, vec_1), t1); \
41 t1 = vec_add(t1, vec_rnd); \
42 t2 = vec_add(vec_sl(s6, vec_2), vec_sl(s6, vec_1)); \
43 t2 = vec_add(t2, vec_sl(s2, vec_4)); \
44 t3 = vec_add(vec_sl(s2, vec_2), vec_sl(s2, vec_1)); \
45 t3 = vec_sub(t3, vec_sl(s6, vec_4)); \
46 t4 = vec_add(t0, t2); \
47 t5 = vec_add(t1, t3); \
48 t6 = vec_sub(t1, t3); \
49 t7 = vec_sub(t0, t2); \
50 \
51 t0 = vec_sl(vec_add(s1, s3), vec_4); \
52 t0 = vec_add(t0, vec_sl(s5, vec_3)); \
53 t0 = vec_add(t0, vec_sl(s7, vec_2)); \
54 t0 = vec_add(t0, vec_sub(s5, s3)); \
55 \
56 t1 = vec_sl(vec_sub(s1, s5), vec_4); \
57 t1 = vec_sub(t1, vec_sl(s7, vec_3)); \
58 t1 = vec_sub(t1, vec_sl(s3, vec_2)); \
59 t1 = vec_sub(t1, vec_add(s1, s7)); \
60 \
61 t2 = vec_sl(vec_sub(s7, s3), vec_4); \
62 t2 = vec_add(t2, vec_sl(s1, vec_3)); \
63 t2 = vec_add(t2, vec_sl(s5, vec_2)); \
64 t2 = vec_add(t2, vec_sub(s1, s7)); \
65 \
66 t3 = vec_sl(vec_sub(s5, s7), vec_4); \
67 t3 = vec_sub(t3, vec_sl(s3, vec_3)); \
68 t3 = vec_add(t3, vec_sl(s1, vec_2)); \
69 t3 = vec_sub(t3, vec_add(s3, s5)); \
70 \
71 s0 = vec_add(t4, t0); \
72 s1 = vec_add(t5, t1); \
73 s2 = vec_add(t6, t2); \
74 s3 = vec_add(t7, t3); \
75 s4 = vec_sub(t7, t3); \
76 s5 = vec_sub(t6, t2); \
77 s6 = vec_sub(t5, t1); \
78 s7 = vec_sub(t4, t0); \
79 }while(0)
80
81 #define SHIFT_HOR8(s0, s1, s2, s3, s4, s5, s6, s7) \
82 do { \
83 s0 = vec_sra(s0, vec_3); \
84 s1 = vec_sra(s1, vec_3); \
85 s2 = vec_sra(s2, vec_3); \
86 s3 = vec_sra(s3, vec_3); \
87 s4 = vec_sra(s4, vec_3); \
88 s5 = vec_sra(s5, vec_3); \
89 s6 = vec_sra(s6, vec_3); \
90 s7 = vec_sra(s7, vec_3); \
91 }while(0)
92
93 #define SHIFT_VERT8(s0, s1, s2, s3, s4, s5, s6, s7) \
94 do { \
95 s0 = vec_sra(s0, vec_7); \
96 s1 = vec_sra(s1, vec_7); \
97 s2 = vec_sra(s2, vec_7); \
98 s3 = vec_sra(s3, vec_7); \
99 s4 = vec_sra(vec_add(s4, vec_1s), vec_7); \
100 s5 = vec_sra(vec_add(s5, vec_1s), vec_7); \
101 s6 = vec_sra(vec_add(s6, vec_1s), vec_7); \
102 s7 = vec_sra(vec_add(s7, vec_1s), vec_7); \
103 }while(0)
104
105 /* main steps of 4x4 transform */
106 #define STEP4(s0, s1, s2, s3, vec_rnd) \
107 do { \
108 t1 = vec_add(vec_sl(s0, vec_4), s0); \
109 t1 = vec_add(t1, vec_rnd); \
110 t2 = vec_add(vec_sl(s2, vec_4), s2); \
111 t0 = vec_add(t1, t2); \
112 t1 = vec_sub(t1, t2); \
113 t3 = vec_sl(vec_sub(s3, s1), vec_1); \
114 t3 = vec_add(t3, vec_sl(t3, vec_2)); \
115 t2 = vec_add(t3, vec_sl(s1, vec_5)); \
116 t3 = vec_add(t3, vec_sl(s3, vec_3)); \
117 t3 = vec_add(t3, vec_sl(s3, vec_2)); \
118 s0 = vec_add(t0, t2); \
119 s1 = vec_sub(t1, t3); \
120 s2 = vec_add(t1, t3); \
121 s3 = vec_sub(t0, t2); \
122 }while (0)
123
124 #define SHIFT_HOR4(s0, s1, s2, s3) \
125 s0 = vec_sra(s0, vec_3); \
126 s1 = vec_sra(s1, vec_3); \
127 s2 = vec_sra(s2, vec_3); \
128 s3 = vec_sra(s3, vec_3);
129
130 #define SHIFT_VERT4(s0, s1, s2, s3) \
131 s0 = vec_sra(s0, vec_7); \
132 s1 = vec_sra(s1, vec_7); \
133 s2 = vec_sra(s2, vec_7); \
134 s3 = vec_sra(s3, vec_7);
135
136 /** Do inverse transform on 8x8 block
137 */
vc1_inv_trans_8x8_altivec(int16_t block[64])138 static void vc1_inv_trans_8x8_altivec(int16_t block[64])
139 {
140 vector signed short src0, src1, src2, src3, src4, src5, src6, src7;
141 vector signed int s0, s1, s2, s3, s4, s5, s6, s7;
142 vector signed int s8, s9, sA, sB, sC, sD, sE, sF;
143 vector signed int t0, t1, t2, t3, t4, t5, t6, t7;
144 const vector signed int vec_64 = vec_sl(vec_splat_s32(4), vec_splat_u32(4));
145 const vector unsigned int vec_7 = vec_splat_u32(7);
146 const vector unsigned int vec_4 = vec_splat_u32(4);
147 const vector signed int vec_4s = vec_splat_s32(4);
148 const vector unsigned int vec_3 = vec_splat_u32(3);
149 const vector unsigned int vec_2 = vec_splat_u32(2);
150 const vector signed int vec_1s = vec_splat_s32(1);
151 const vector unsigned int vec_1 = vec_splat_u32(1);
152
153 src0 = vec_ld( 0, block);
154 src1 = vec_ld( 16, block);
155 src2 = vec_ld( 32, block);
156 src3 = vec_ld( 48, block);
157 src4 = vec_ld( 64, block);
158 src5 = vec_ld( 80, block);
159 src6 = vec_ld( 96, block);
160 src7 = vec_ld(112, block);
161
162 s0 = vec_unpackl(src0);
163 s1 = vec_unpackl(src1);
164 s2 = vec_unpackl(src2);
165 s3 = vec_unpackl(src3);
166 s4 = vec_unpackl(src4);
167 s5 = vec_unpackl(src5);
168 s6 = vec_unpackl(src6);
169 s7 = vec_unpackl(src7);
170 s8 = vec_unpackh(src0);
171 s9 = vec_unpackh(src1);
172 sA = vec_unpackh(src2);
173 sB = vec_unpackh(src3);
174 sC = vec_unpackh(src4);
175 sD = vec_unpackh(src5);
176 sE = vec_unpackh(src6);
177 sF = vec_unpackh(src7);
178 STEP8(s0, s1, s2, s3, s4, s5, s6, s7, vec_4s);
179 SHIFT_HOR8(s0, s1, s2, s3, s4, s5, s6, s7);
180 STEP8(s8, s9, sA, sB, sC, sD, sE, sF, vec_4s);
181 SHIFT_HOR8(s8, s9, sA, sB, sC, sD, sE, sF);
182 src0 = vec_pack(s8, s0);
183 src1 = vec_pack(s9, s1);
184 src2 = vec_pack(sA, s2);
185 src3 = vec_pack(sB, s3);
186 src4 = vec_pack(sC, s4);
187 src5 = vec_pack(sD, s5);
188 src6 = vec_pack(sE, s6);
189 src7 = vec_pack(sF, s7);
190 TRANSPOSE8(src0, src1, src2, src3, src4, src5, src6, src7);
191
192 s0 = vec_unpackl(src0);
193 s1 = vec_unpackl(src1);
194 s2 = vec_unpackl(src2);
195 s3 = vec_unpackl(src3);
196 s4 = vec_unpackl(src4);
197 s5 = vec_unpackl(src5);
198 s6 = vec_unpackl(src6);
199 s7 = vec_unpackl(src7);
200 s8 = vec_unpackh(src0);
201 s9 = vec_unpackh(src1);
202 sA = vec_unpackh(src2);
203 sB = vec_unpackh(src3);
204 sC = vec_unpackh(src4);
205 sD = vec_unpackh(src5);
206 sE = vec_unpackh(src6);
207 sF = vec_unpackh(src7);
208 STEP8(s0, s1, s2, s3, s4, s5, s6, s7, vec_64);
209 SHIFT_VERT8(s0, s1, s2, s3, s4, s5, s6, s7);
210 STEP8(s8, s9, sA, sB, sC, sD, sE, sF, vec_64);
211 SHIFT_VERT8(s8, s9, sA, sB, sC, sD, sE, sF);
212 src0 = vec_pack(s8, s0);
213 src1 = vec_pack(s9, s1);
214 src2 = vec_pack(sA, s2);
215 src3 = vec_pack(sB, s3);
216 src4 = vec_pack(sC, s4);
217 src5 = vec_pack(sD, s5);
218 src6 = vec_pack(sE, s6);
219 src7 = vec_pack(sF, s7);
220
221 vec_st(src0, 0, block);
222 vec_st(src1, 16, block);
223 vec_st(src2, 32, block);
224 vec_st(src3, 48, block);
225 vec_st(src4, 64, block);
226 vec_st(src5, 80, block);
227 vec_st(src6, 96, block);
228 vec_st(src7,112, block);
229 }
230
231 /** Do inverse transform on 8x4 part of block
232 */
vc1_inv_trans_8x4_altivec(uint8_t * dest,ptrdiff_t stride,int16_t * block)233 static void vc1_inv_trans_8x4_altivec(uint8_t *dest, ptrdiff_t stride,
234 int16_t *block)
235 {
236 vector signed short src0, src1, src2, src3, src4, src5, src6, src7;
237 vector signed int s0, s1, s2, s3, s4, s5, s6, s7;
238 vector signed int s8, s9, sA, sB, sC, sD, sE, sF;
239 vector signed int t0, t1, t2, t3, t4, t5, t6, t7;
240 const vector signed int vec_64 = vec_sl(vec_splat_s32(4), vec_splat_u32(4));
241 const vector unsigned int vec_7 = vec_splat_u32(7);
242 const vector unsigned int vec_5 = vec_splat_u32(5);
243 const vector unsigned int vec_4 = vec_splat_u32(4);
244 const vector signed int vec_4s = vec_splat_s32(4);
245 const vector unsigned int vec_3 = vec_splat_u32(3);
246 const vector unsigned int vec_2 = vec_splat_u32(2);
247 const vector unsigned int vec_1 = vec_splat_u32(1);
248 vector unsigned char tmp;
249 vector signed short tmp2, tmp3;
250 vector unsigned char perm0, perm1, p0, p1, p;
251
252 src0 = vec_ld( 0, block);
253 src1 = vec_ld( 16, block);
254 src2 = vec_ld( 32, block);
255 src3 = vec_ld( 48, block);
256 src4 = vec_ld( 64, block);
257 src5 = vec_ld( 80, block);
258 src6 = vec_ld( 96, block);
259 src7 = vec_ld(112, block);
260
261 TRANSPOSE8(src0, src1, src2, src3, src4, src5, src6, src7);
262 s0 = vec_unpackl(src0);
263 s1 = vec_unpackl(src1);
264 s2 = vec_unpackl(src2);
265 s3 = vec_unpackl(src3);
266 s4 = vec_unpackl(src4);
267 s5 = vec_unpackl(src5);
268 s6 = vec_unpackl(src6);
269 s7 = vec_unpackl(src7);
270 s8 = vec_unpackh(src0);
271 s9 = vec_unpackh(src1);
272 sA = vec_unpackh(src2);
273 sB = vec_unpackh(src3);
274 sC = vec_unpackh(src4);
275 sD = vec_unpackh(src5);
276 sE = vec_unpackh(src6);
277 sF = vec_unpackh(src7);
278 STEP8(s0, s1, s2, s3, s4, s5, s6, s7, vec_4s);
279 SHIFT_HOR8(s0, s1, s2, s3, s4, s5, s6, s7);
280 STEP8(s8, s9, sA, sB, sC, sD, sE, sF, vec_4s);
281 SHIFT_HOR8(s8, s9, sA, sB, sC, sD, sE, sF);
282 src0 = vec_pack(s8, s0);
283 src1 = vec_pack(s9, s1);
284 src2 = vec_pack(sA, s2);
285 src3 = vec_pack(sB, s3);
286 src4 = vec_pack(sC, s4);
287 src5 = vec_pack(sD, s5);
288 src6 = vec_pack(sE, s6);
289 src7 = vec_pack(sF, s7);
290 TRANSPOSE8(src0, src1, src2, src3, src4, src5, src6, src7);
291
292 s0 = vec_unpackh(src0);
293 s1 = vec_unpackh(src1);
294 s2 = vec_unpackh(src2);
295 s3 = vec_unpackh(src3);
296 s8 = vec_unpackl(src0);
297 s9 = vec_unpackl(src1);
298 sA = vec_unpackl(src2);
299 sB = vec_unpackl(src3);
300 STEP4(s0, s1, s2, s3, vec_64);
301 SHIFT_VERT4(s0, s1, s2, s3);
302 STEP4(s8, s9, sA, sB, vec_64);
303 SHIFT_VERT4(s8, s9, sA, sB);
304 src0 = vec_pack(s0, s8);
305 src1 = vec_pack(s1, s9);
306 src2 = vec_pack(s2, sA);
307 src3 = vec_pack(s3, sB);
308
309 #if HAVE_BIGENDIAN
310 p0 = vec_lvsl (0, dest);
311 p1 = vec_lvsl (stride, dest);
312 p = vec_splat_u8 (-1);
313 perm0 = vec_mergeh (p, p0);
314 perm1 = vec_mergeh (p, p1);
315 #define GET_TMP2(dst, p) \
316 tmp = vec_ld (0, dest); \
317 tmp2 = (vector signed short)vec_perm (tmp, vec_splat_u8(0), p);
318 #else
319 #define GET_TMP2(dst,p) \
320 tmp = vec_vsx_ld (0, dst); \
321 tmp2 = (vector signed short)vec_mergeh (tmp, vec_splat_u8(0));
322 #endif
323
324 #define ADD(dest,src,perm) \
325 GET_TMP2(dest, perm); \
326 tmp3 = vec_adds (tmp2, src); \
327 tmp = vec_packsu (tmp3, tmp3); \
328 vec_ste ((vector unsigned int)tmp, 0, (unsigned int *)dest); \
329 vec_ste ((vector unsigned int)tmp, 4, (unsigned int *)dest);
330
331 ADD (dest, src0, perm0) dest += stride;
332 ADD (dest, src1, perm1) dest += stride;
333 ADD (dest, src2, perm0) dest += stride;
334 ADD (dest, src3, perm1)
335 }
336
337 #define PUT_OP_U8_ALTIVEC(d, s, dst) d = s
338 #define AVG_OP_U8_ALTIVEC(d, s, dst) d = vec_avg(dst, s)
339
340 #define OP_U8_ALTIVEC PUT_OP_U8_ALTIVEC
341 #define PREFIX_no_rnd_vc1_chroma_mc8_altivec put_no_rnd_vc1_chroma_mc8_altivec
342 #include "h264chroma_template.c"
343 #undef OP_U8_ALTIVEC
344 #undef PREFIX_no_rnd_vc1_chroma_mc8_altivec
345
346 #define OP_U8_ALTIVEC AVG_OP_U8_ALTIVEC
347 #define PREFIX_no_rnd_vc1_chroma_mc8_altivec avg_no_rnd_vc1_chroma_mc8_altivec
348 #include "h264chroma_template.c"
349 #undef OP_U8_ALTIVEC
350 #undef PREFIX_no_rnd_vc1_chroma_mc8_altivec
351
352 #endif /* HAVE_ALTIVEC */
353
ff_vc1dsp_init_ppc(VC1DSPContext * dsp)354 av_cold void ff_vc1dsp_init_ppc(VC1DSPContext *dsp)
355 {
356 #if HAVE_ALTIVEC
357 if (!PPC_ALTIVEC(av_get_cpu_flags()))
358 return;
359
360 dsp->vc1_inv_trans_8x8 = vc1_inv_trans_8x8_altivec;
361 dsp->vc1_inv_trans_8x4 = vc1_inv_trans_8x4_altivec;
362 dsp->put_no_rnd_vc1_chroma_pixels_tab[0] = put_no_rnd_vc1_chroma_mc8_altivec;
363 dsp->avg_no_rnd_vc1_chroma_pixels_tab[0] = avg_no_rnd_vc1_chroma_mc8_altivec;
364 #endif /* HAVE_ALTIVEC */
365 }
366