libavcodec/ppc/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
  23 #include "dsputil.h"
  24
  25 #include "gcc_fixes.h"
  26
  27 #include "dsputil_altivec.h"
  28
  29 // main steps of 8x8 transform
  30 #define STEP8(s0, s1, s2, s3, s4, s5, s6, s7, vec_rnd) \
  31 do { \
  32     t0 = vec_sl(vec_add(s0, s4), vec_2); \
  33     t0 = vec_add(vec_sl(t0, vec_1), t0); \
  34     t0 = vec_add(t0, vec_rnd); \
  35     t1 = vec_sl(vec_sub(s0, s4), vec_2); \
  36     t1 = vec_add(vec_sl(t1, vec_1), t1); \
  37     t1 = vec_add(t1, vec_rnd); \
  38     t2 = vec_add(vec_sl(s6, vec_2), vec_sl(s6, vec_1)); \
  39     t2 = vec_add(t2, vec_sl(s2, vec_4)); \
  40     t3 = vec_add(vec_sl(s2, vec_2), vec_sl(s2, vec_1)); \
  41     t3 = vec_sub(t3, vec_sl(s6, vec_4)); \
  42     t4 = vec_add(t0, t2); \
  43     t5 = vec_add(t1, t3); \
  44     t6 = vec_sub(t1, t3); \
  45     t7 = vec_sub(t0, t2); \
  46 \
  47     t0 = vec_sl(vec_add(s1, s3), vec_4); \
  48     t0 = vec_add(t0, vec_sl(s5, vec_3)); \
  49     t0 = vec_add(t0, vec_sl(s7, vec_2)); \
  50     t0 = vec_add(t0, vec_sub(s5, s3)); \
  51 \
  52     t1 = vec_sl(vec_sub(s1, s5), vec_4); \
  53     t1 = vec_sub(t1, vec_sl(s7, vec_3)); \
  54     t1 = vec_sub(t1, vec_sl(s3, vec_2)); \
  55     t1 = vec_sub(t1, vec_add(s1, s7)); \
  56 \
  57     t2 = vec_sl(vec_sub(s7, s3), vec_4); \
  58     t2 = vec_add(t2, vec_sl(s1, vec_3)); \
  59     t2 = vec_add(t2, vec_sl(s5, vec_2)); \
  60     t2 = vec_add(t2, vec_sub(s1, s7)); \
  61 \
  62     t3 = vec_sl(vec_sub(s5, s7), vec_4); \
  63     t3 = vec_sub(t3, vec_sl(s3, vec_3)); \
  64     t3 = vec_add(t3, vec_sl(s1, vec_2)); \
  65     t3 = vec_sub(t3, vec_add(s3, s5)); \
  66 \
  67     s0 = vec_add(t4, t0); \
  68     s1 = vec_add(t5, t1); \
  69     s2 = vec_add(t6, t2); \
  70     s3 = vec_add(t7, t3); \
  71     s4 = vec_sub(t7, t3); \
  72     s5 = vec_sub(t6, t2); \
  73     s6 = vec_sub(t5, t1); \
  74     s7 = vec_sub(t4, t0); \
  75 }while(0)
  76
  77 #define SHIFT_HOR8(s0, s1, s2, s3, s4, s5, s6, s7) \
  78 do { \
  79     s0 = vec_sra(s0, vec_3); \
  80     s1 = vec_sra(s1, vec_3); \
  81     s2 = vec_sra(s2, vec_3); \
  82     s3 = vec_sra(s3, vec_3); \
  83     s4 = vec_sra(s4, vec_3); \
  84     s5 = vec_sra(s5, vec_3); \
  85     s6 = vec_sra(s6, vec_3); \
  86     s7 = vec_sra(s7, vec_3); \
  87 }while(0)
  88
  89 #define SHIFT_VERT8(s0, s1, s2, s3, s4, s5, s6, s7) \
  90 do { \
  91     s0 = vec_sra(s0, vec_7); \
  92     s1 = vec_sra(s1, vec_7); \
  93     s2 = vec_sra(s2, vec_7); \
  94     s3 = vec_sra(s3, vec_7); \
  95     s4 = vec_sra(vec_add(s4, vec_1s), vec_7); \
  96     s5 = vec_sra(vec_add(s5, vec_1s), vec_7); \
  97     s6 = vec_sra(vec_add(s6, vec_1s), vec_7); \
  98     s7 = vec_sra(vec_add(s7, vec_1s), vec_7); \
  99 }while(0)
 100
 101 /* main steps of 4x4 transform */
 102 #define STEP4(s0, s1, s2, s3, vec_rnd) \
 103 do { \
 104     t1 = vec_add(vec_sl(s0, vec_4), s0); \
 105     t1 = vec_add(t1, vec_rnd); \
 106     t2 = vec_add(vec_sl(s2, vec_4), s2); \
 107     t0 = vec_add(t1, t2); \
 108     t1 = vec_sub(t1, t2); \
 109     t3 = vec_sl(vec_sub(s3, s1), vec_1); \
 110     t3 = vec_add(t3, vec_sl(t3, vec_2)); \
 111     t2 = vec_add(t3, vec_sl(s1, vec_5)); \
 112     t3 = vec_add(t3, vec_sl(s3, vec_3)); \
 113     t3 = vec_add(t3, vec_sl(s3, vec_2)); \
 114     s0 = vec_add(t0, t2); \
 115     s1 = vec_sub(t1, t3); \
 116     s2 = vec_add(t1, t3); \
 117     s3 = vec_sub(t0, t2); \
 118 }while (0)
 119
 120 #define SHIFT_HOR4(s0, s1, s2, s3) \
 121     s0 = vec_sra(s0, vec_3); \
 122     s1 = vec_sra(s1, vec_3); \
 123     s2 = vec_sra(s2, vec_3); \
 124     s3 = vec_sra(s3, vec_3);
 125
 126 #define SHIFT_VERT4(s0, s1, s2, s3) \
 127     s0 = vec_sra(s0, vec_7); \
 128     s1 = vec_sra(s1, vec_7); \
 129     s2 = vec_sra(s2, vec_7); \
 130     s3 = vec_sra(s3, vec_7);
 131
 132 /** Do inverse transform on 8x8 block
 133 */
 134 static void vc1_inv_trans_8x8_altivec(DCTELEM block[64])
 135 {
 136     vector signed short src0, src1, src2, src3, src4, src5, src6, src7;
 137     vector signed int s0, s1, s2, s3, s4, s5, s6, s7;
 138     vector signed int s8, s9, sA, sB, sC, sD, sE, sF;
 139     vector signed int t0, t1, t2, t3, t4, t5, t6, t7;
 140     const vector signed int vec_64 = vec_sl(vec_splat_s32(4), vec_splat_u32(4));
 141     const vector unsigned int vec_7 = vec_splat_u32(7);
 142     const vector unsigned int vec_5 = vec_splat_u32(5);
 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
 151     src0 = vec_ld(  0, block);
 152     src1 = vec_ld( 16, block);
 153     src2 = vec_ld( 32, block);
 154     src3 = vec_ld( 48, block);
 155     src4 = vec_ld( 64, block);
 156     src5 = vec_ld( 80, block);
 157     src6 = vec_ld( 96, block);
 158     src7 = vec_ld(112, block);
 159
 160     TRANSPOSE8(src0, src1, src2, src3, src4, src5, src6, src7);
 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(DCTELEM block[64], int n)
 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
 247     src0 = vec_ld(  0, block);
 248     src1 = vec_ld( 16, block);
 249     src2 = vec_ld( 32, block);
 250     src3 = vec_ld( 48, block);
 251     src4 = vec_ld( 64, block);
 252     src5 = vec_ld( 80, block);
 253     src6 = vec_ld( 96, block);
 254     src7 = vec_ld(112, block);
 255
 256     TRANSPOSE8(src0, src1, src2, src3, src4, src5, src6, src7);
 257     s0 = vec_unpackl(src0);
 258     s1 = vec_unpackl(src1);
 259     s2 = vec_unpackl(src2);
 260     s3 = vec_unpackl(src3);
 261     s4 = vec_unpackl(src4);
 262     s5 = vec_unpackl(src5);
 263     s6 = vec_unpackl(src6);
 264     s7 = vec_unpackl(src7);
 265     s8 = vec_unpackh(src0);
 266     s9 = vec_unpackh(src1);
 267     sA = vec_unpackh(src2);
 268     sB = vec_unpackh(src3);
 269     sC = vec_unpackh(src4);
 270     sD = vec_unpackh(src5);
 271     sE = vec_unpackh(src6);
 272     sF = vec_unpackh(src7);
 273     STEP8(s0, s1, s2, s3, s4, s5, s6, s7, vec_4s);
 274     SHIFT_HOR8(s0, s1, s2, s3, s4, s5, s6, s7);
 275     STEP8(s8, s9, sA, sB, sC, sD, sE, sF, vec_4s);
 276     SHIFT_HOR8(s8, s9, sA, sB, sC, sD, sE, sF);
 277     src0 = vec_pack(s8, s0);
 278     src1 = vec_pack(s9, s1);
 279     src2 = vec_pack(sA, s2);
 280     src3 = vec_pack(sB, s3);
 281     src4 = vec_pack(sC, s4);
 282     src5 = vec_pack(sD, s5);
 283     src6 = vec_pack(sE, s6);
 284     src7 = vec_pack(sF, s7);
 285     TRANSPOSE8(src0, src1, src2, src3, src4, src5, src6, src7);
 286
 287     if(!n){ // upper half of block
 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         vec_st(src0,  0, block);
 306         vec_st(src1, 16, block);
 307         vec_st(src2, 32, block);
 308         vec_st(src3, 48, block);
 309     } else { //lower half of block
 310         s0 = vec_unpackh(src4);
 311         s1 = vec_unpackh(src5);
 312         s2 = vec_unpackh(src6);
 313         s3 = vec_unpackh(src7);
 314         s8 = vec_unpackl(src4);
 315         s9 = vec_unpackl(src5);
 316         sA = vec_unpackl(src6);
 317         sB = vec_unpackl(src7);
 318         STEP4(s0, s1, s2, s3, vec_64);
 319         SHIFT_VERT4(s0, s1, s2, s3);
 320         STEP4(s8, s9, sA, sB, vec_64);
 321         SHIFT_VERT4(s8, s9, sA, sB);
 322         src4 = vec_pack(s0, s8);
 323         src5 = vec_pack(s1, s9);
 324         src6 = vec_pack(s2, sA);
 325         src7 = vec_pack(s3, sB);
 326
 327         vec_st(src4, 64, block);
 328         vec_st(src5, 80, block);
 329         vec_st(src6, 96, block);
 330         vec_st(src7,112, block);
 331     }
 332 }
 333
 334
 335 void vc1dsp_init_altivec(DSPContext* dsp, AVCodecContext *avctx) {
 336     dsp->vc1_inv_trans_8x8 = vc1_inv_trans_8x8_altivec;
 337     dsp->vc1_inv_trans_8x4 = vc1_inv_trans_8x4_altivec;
 338 }