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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
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) \
35do { \
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) \
82do { \
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) \
94do { \
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) \
107do { \
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*/
138static 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*/
233static 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;
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
257// Transpose 8x4 matrix of 16-bit elements (in-place)
258 vec_s16 A1, B1, C1, D1;
259 vec_s16 A2, B2, C2, D2;
260
261 A1 = vec_mergeh(src0, src2);
262 B1 = vec_mergel(src0, src2);
263 C1 = vec_mergeh(src1, src3);
264 D1 = vec_mergel(src1, src3);
265
266 A2 = vec_mergeh(A1, C1);
267 B2 = vec_mergel(A1, C1);
268 C2 = vec_mergeh(B1, D1);
269 D2 = vec_mergel(B1, D1);
270
271 s0 = vec_unpackh(A2);
272 s1 = vec_unpackl(A2);
273 s2 = vec_unpackh(B2);
274 s3 = vec_unpackl(B2);
275 s4 = vec_unpackh(C2);
276 s5 = vec_unpackl(C2);
277 s6 = vec_unpackh(D2);
278 s7 = vec_unpackl(D2);
279
280 STEP8(s0, s1, s2, s3, s4, s5, s6, s7, vec_4s);
281 SHIFT_HOR8(s0, s1, s2, s3, s4, s5, s6, s7);
282
283 src0 = vec_pack(s0, s0);
284 src1 = vec_pack(s1, s1);
285 src2 = vec_pack(s2, s2);
286 src3 = vec_pack(s3, s3);
287 src4 = vec_pack(s4, s4);
288 src5 = vec_pack(s5, s5);
289 src6 = vec_pack(s6, s6);
290 src7 = vec_pack(s7, s7);
291
292 TRANSPOSE8(src0, src1, src2, src3, src4, src5, src6, src7);
293
294 s0 = vec_unpackh(src0);
295 s1 = vec_unpackh(src1);
296 s2 = vec_unpackh(src2);
297 s3 = vec_unpackh(src3);
298 s8 = vec_unpackl(src0);
299 s9 = vec_unpackl(src1);
300 sA = vec_unpackl(src2);
301 sB = vec_unpackl(src3);
302 STEP4(s0, s1, s2, s3, vec_64);
303 SHIFT_VERT4(s0, s1, s2, s3);
304 STEP4(s8, s9, sA, sB, vec_64);
305 SHIFT_VERT4(s8, s9, sA, sB);
306 src0 = vec_pack(s0, s8);
307 src1 = vec_pack(s1, s9);
308 src2 = vec_pack(s2, sA);
309 src3 = vec_pack(s3, sB);
310
311#if HAVE_BIGENDIAN
312 p0 = vec_lvsl (0, dest);
313 p1 = vec_lvsl (stride, dest);
314 p = vec_splat_u8 (-1);
315 perm0 = vec_mergeh (p, p0);
316 perm1 = vec_mergeh (p, p1);
317#define GET_TMP2(dst, p) \
318 tmp = vec_ld (0, dest); \
319 tmp2 = (vector signed short)vec_perm (tmp, vec_splat_u8(0), p);
320#else
321#define GET_TMP2(dst,p) \
322 tmp = vec_vsx_ld (0, dst); \
323 tmp2 = (vector signed short)vec_mergeh (tmp, vec_splat_u8(0));
324#endif
325
326#define ADD(dest,src,perm) \
327 GET_TMP2(dest, perm); \
328 tmp3 = vec_adds (tmp2, src); \
329 tmp = vec_packsu (tmp3, tmp3); \
330 vec_ste ((vector unsigned int)tmp, 0, (unsigned int *)dest); \
331 vec_ste ((vector unsigned int)tmp, 4, (unsigned int *)dest);
332
333 ADD (dest, src0, perm0) dest += stride;
334 ADD (dest, src1, perm1) dest += stride;
335 ADD (dest, src2, perm0) dest += stride;
336 ADD (dest, src3, perm1)
337}
338
339#define PUT_OP_U8_ALTIVEC(d, s, dst) d = s
340#define AVG_OP_U8_ALTIVEC(d, s, dst) d = vec_avg(dst, s)
341
342#define OP_U8_ALTIVEC PUT_OP_U8_ALTIVEC
343#define PREFIX_no_rnd_vc1_chroma_mc8_altivec put_no_rnd_vc1_chroma_mc8_altivec
344#include "h264chroma_template.c"
345#undef OP_U8_ALTIVEC
346#undef PREFIX_no_rnd_vc1_chroma_mc8_altivec
347
348#define OP_U8_ALTIVEC AVG_OP_U8_ALTIVEC
349#define PREFIX_no_rnd_vc1_chroma_mc8_altivec avg_no_rnd_vc1_chroma_mc8_altivec
350#include "h264chroma_template.c"
351#undef OP_U8_ALTIVEC
352#undef PREFIX_no_rnd_vc1_chroma_mc8_altivec
353
354#endif /* HAVE_ALTIVEC */
355
356av_cold void ff_vc1dsp_init_ppc(VC1DSPContext *dsp)
357{
358#if HAVE_ALTIVEC
359 if (!PPC_ALTIVEC(av_get_cpu_flags()))
360 return;
361
362 dsp->vc1_inv_trans_8x8 = vc1_inv_trans_8x8_altivec;
363 dsp->vc1_inv_trans_8x4 = vc1_inv_trans_8x4_altivec;
364 dsp->put_no_rnd_vc1_chroma_pixels_tab[0] = put_no_rnd_vc1_chroma_mc8_altivec;
365 dsp->avg_no_rnd_vc1_chroma_pixels_tab[0] = avg_no_rnd_vc1_chroma_mc8_altivec;
366#endif /* HAVE_ALTIVEC */
367}
A2
#define A2
Definition binkdsp.c:31
A1
#define A1
Definition binkdsp.c:30
ADD
#define ADD(a, b)
Definition dct32_template.c:123
block
static int16_t block[64]
Definition dct.c:125
B2
#define B2
Definition faandct.c:43
B1
#define B1
Definition faandct.c:42
src2
const pixel * src2
Definition h264pred_template.c:421
attributes.h
Macro definitions for various function/variable attributes.
av_cold
#define av_cold
Definition attributes.h:117
av_get_cpu_flags
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition cpu.c:109
PPC_ALTIVEC
#define PPC_ALTIVEC(flags)
Definition cpu.h:25
C1
#define C1
Definition mpegaudiodsp_template.c:238
C2
#define C2
Definition mpegaudiodsp_template.c:239
Windows::Graphics::DirectX::Direct3D11::p
IDirect3DDxgiInterfaceAccess _COM_Outptr_ void ** p
Definition vsrc_gfxcapture_winrt.hpp:53
h264chroma_template.c
VC1DSPContext::put_no_rnd_vc1_chroma_pixels_tab
h264_chroma_mc_func put_no_rnd_vc1_chroma_pixels_tab[3]
Definition vc1dsp.h:65
VC1DSPContext::vc1_inv_trans_8x4
void(* vc1_inv_trans_8x4)(uint8_t *dest, ptrdiff_t stride, int16_t *block)
Definition vc1dsp.h:40
VC1DSPContext::vc1_inv_trans_8x8
void(* vc1_inv_trans_8x8)(int16_t *b)
Definition vc1dsp.h:39
VC1DSPContext::avg_no_rnd_vc1_chroma_pixels_tab
h264_chroma_mc_func avg_no_rnd_vc1_chroma_pixels_tab[3]
Definition vc1dsp.h:66
stride
#define stride
Definition h264pred_template.c:536
tmp
static uint8_t tmp[40]
Definition aes_ctr.c:52
src1
#define src1
Definition h264pred.c:141
src0
#define src0
Definition h264pred.c:140
util_altivec.h
Contains misc utility macros and inline functions.
vec_s16
#define vec_s16
Definition util_altivec.h:37
vc1dsp.h
VC-1 and WMV3 decoder.
ff_vc1dsp_init_ppc
av_cold void ff_vc1dsp_init_ppc(VC1DSPContext *dsp)
Definition vc1dsp_altivec.c:356
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