vc1dsp_altivec.c

   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 }