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   1 /*
   2  * Copyright (c) 2004 Romain Dolbeau <romain@dolbeau.org>
   3  *
   4  * This file is part of FFmpeg.
   5  *
   6  * FFmpeg is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * FFmpeg is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with FFmpeg; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #include "config.h"
  22 #include "libavutil/attributes.h"
  23 #include "libavutil/cpu.h"
  24 #include "libavutil/intreadwrite.h"
  25 #include "libavutil/ppc/cpu.h"
  26 #include "libavutil/ppc/types_altivec.h"
  27 #include "libavutil/ppc/util_altivec.h"
  28 #include "libavcodec/h264data.h"
  29 #include "libavcodec/h264dsp.h"
  30
  31 #if HAVE_ALTIVEC
  32
  33 /****************************************************************************
  34  * IDCT transform:
  35  ****************************************************************************/
  36
  37 #define VEC_1D_DCT(vb0,vb1,vb2,vb3,va0,va1,va2,va3)               \
  38     /* 1st stage */                                               \
  39     vz0 = vec_add(vb0,vb2);       /* temp[0] = Y[0] + Y[2] */     \
  40     vz1 = vec_sub(vb0,vb2);       /* temp[1] = Y[0] - Y[2] */     \
  41     vz2 = vec_sra(vb1,vec_splat_u16(1));                          \
  42     vz2 = vec_sub(vz2,vb3);       /* temp[2] = Y[1].1/2 - Y[3] */ \
  43     vz3 = vec_sra(vb3,vec_splat_u16(1));                          \
  44     vz3 = vec_add(vb1,vz3);       /* temp[3] = Y[1] + Y[3].1/2 */ \
  45     /* 2nd stage: output */                                       \
  46     va0 = vec_add(vz0,vz3);       /* x[0] = temp[0] + temp[3] */  \
  47     va1 = vec_add(vz1,vz2);       /* x[1] = temp[1] + temp[2] */  \
  48     va2 = vec_sub(vz1,vz2);       /* x[2] = temp[1] - temp[2] */  \
  49     va3 = vec_sub(vz0,vz3)        /* x[3] = temp[0] - temp[3] */
  50
  51 #define VEC_TRANSPOSE_4(a0,a1,a2,a3,b0,b1,b2,b3) \
  52     b0 = vec_mergeh( a0, a0 ); \
  53     b1 = vec_mergeh( a1, a0 ); \
  54     b2 = vec_mergeh( a2, a0 ); \
  55     b3 = vec_mergeh( a3, a0 ); \
  56     a0 = vec_mergeh( b0, b2 ); \
  57     a1 = vec_mergel( b0, b2 ); \
  58     a2 = vec_mergeh( b1, b3 ); \
  59     a3 = vec_mergel( b1, b3 ); \
  60     b0 = vec_mergeh( a0, a2 ); \
  61     b1 = vec_mergel( a0, a2 ); \
  62     b2 = vec_mergeh( a1, a3 ); \
  63     b3 = vec_mergel( a1, a3 )
  64
  65 #define VEC_LOAD_U8_ADD_S16_STORE_U8(va)                      \
  66     vdst_orig = vec_ld(0, dst);                               \
  67     vdst = vec_perm(vdst_orig, zero_u8v, vdst_mask);          \
  68     vdst_ss = (vec_s16) vec_mergeh(zero_u8v, vdst);         \
  69     va = vec_add(va, vdst_ss);                                \
  70     va_u8 = vec_packsu(va, zero_s16v);                        \
  71     va_u32 = vec_splat((vec_u32)va_u8, 0);                  \
  72     vec_ste(va_u32, element, (uint32_t*)dst);
  73
  74 static void h264_idct_add_altivec(uint8_t *dst, int16_t *block, int stride)
  75 {
  76     vec_s16 va0, va1, va2, va3;
  77     vec_s16 vz0, vz1, vz2, vz3;
  78     vec_s16 vtmp0, vtmp1, vtmp2, vtmp3;
  79     vec_u8 va_u8;
  80     vec_u32 va_u32;
  81     vec_s16 vdst_ss;
  82     const vec_u16 v6us = vec_splat_u16(6);
  83     vec_u8 vdst, vdst_orig;
  84     vec_u8 vdst_mask = vec_lvsl(0, dst);
  85     int element = ((unsigned long)dst & 0xf) >> 2;
  86     LOAD_ZERO;
  87
  88     block[0] += 32;  /* add 32 as a DC-level for rounding */
  89
  90     vtmp0 = vec_ld(0,block);
  91     vtmp1 = vec_sld(vtmp0, vtmp0, 8);
  92     vtmp2 = vec_ld(16,block);
  93     vtmp3 = vec_sld(vtmp2, vtmp2, 8);
  94     memset(block, 0, 16 * sizeof(int16_t));
  95
  96     VEC_1D_DCT(vtmp0,vtmp1,vtmp2,vtmp3,va0,va1,va2,va3);
  97     VEC_TRANSPOSE_4(va0,va1,va2,va3,vtmp0,vtmp1,vtmp2,vtmp3);
  98     VEC_1D_DCT(vtmp0,vtmp1,vtmp2,vtmp3,va0,va1,va2,va3);
  99
 100     va0 = vec_sra(va0,v6us);
 101     va1 = vec_sra(va1,v6us);
 102     va2 = vec_sra(va2,v6us);
 103     va3 = vec_sra(va3,v6us);
 104
 105     VEC_LOAD_U8_ADD_S16_STORE_U8(va0);
 106     dst += stride;
 107     VEC_LOAD_U8_ADD_S16_STORE_U8(va1);
 108     dst += stride;
 109     VEC_LOAD_U8_ADD_S16_STORE_U8(va2);
 110     dst += stride;
 111     VEC_LOAD_U8_ADD_S16_STORE_U8(va3);
 112 }
 113
 114 #define IDCT8_1D_ALTIVEC(s0, s1, s2, s3, s4, s5, s6, s7,  d0, d1, d2, d3, d4, d5, d6, d7) {\
 115     /*        a0  = SRC(0) + SRC(4); */ \
 116     vec_s16 a0v = vec_add(s0, s4);    \
 117     /*        a2  = SRC(0) - SRC(4); */ \
 118     vec_s16 a2v = vec_sub(s0, s4);    \
 119     /*        a4  =           (SRC(2)>>1) - SRC(6); */ \
 120     vec_s16 a4v = vec_sub(vec_sra(s2, onev), s6);    \
 121     /*        a6  =           (SRC(6)>>1) + SRC(2); */ \
 122     vec_s16 a6v = vec_add(vec_sra(s6, onev), s2);    \
 123     /*        b0  =         a0 + a6; */ \
 124     vec_s16 b0v = vec_add(a0v, a6v);  \
 125     /*        b2  =         a2 + a4; */ \
 126     vec_s16 b2v = vec_add(a2v, a4v);  \
 127     /*        b4  =         a2 - a4; */ \
 128     vec_s16 b4v = vec_sub(a2v, a4v);  \
 129     /*        b6  =         a0 - a6; */ \
 130     vec_s16 b6v = vec_sub(a0v, a6v);  \
 131     /* a1 =  SRC(5) - SRC(3) - SRC(7) - (SRC(7)>>1); */ \
 132     /*        a1 =             (SRC(5)-SRC(3)) -  (SRC(7)  +  (SRC(7)>>1)); */ \
 133     vec_s16 a1v = vec_sub( vec_sub(s5, s3), vec_add(s7, vec_sra(s7, onev)) ); \
 134     /* a3 =  SRC(7) + SRC(1) - SRC(3) - (SRC(3)>>1); */ \
 135     /*        a3 =             (SRC(7)+SRC(1)) -  (SRC(3)  +  (SRC(3)>>1)); */ \
 136     vec_s16 a3v = vec_sub( vec_add(s7, s1), vec_add(s3, vec_sra(s3, onev)) );\
 137     /* a5 =  SRC(7) - SRC(1) + SRC(5) + (SRC(5)>>1); */ \
 138     /*        a5 =             (SRC(7)-SRC(1)) +   SRC(5) +   (SRC(5)>>1); */ \
 139     vec_s16 a5v = vec_add( vec_sub(s7, s1), vec_add(s5, vec_sra(s5, onev)) );\
 140     /*        a7 =                SRC(5)+SRC(3) +  SRC(1) +   (SRC(1)>>1); */ \
 141     vec_s16 a7v = vec_add( vec_add(s5, s3), vec_add(s1, vec_sra(s1, onev)) );\
 142     /*        b1 =                  (a7>>2)  +  a1; */ \
 143     vec_s16 b1v = vec_add( vec_sra(a7v, twov), a1v); \
 144     /*        b3 =          a3 +        (a5>>2); */ \
 145     vec_s16 b3v = vec_add(a3v, vec_sra(a5v, twov)); \
 146     /*        b5 =                  (a3>>2)  -   a5; */ \
 147     vec_s16 b5v = vec_sub( vec_sra(a3v, twov), a5v); \
 148     /*        b7 =           a7 -        (a1>>2); */ \
 149     vec_s16 b7v = vec_sub( a7v, vec_sra(a1v, twov)); \
 150     /* DST(0,    b0 + b7); */ \
 151     d0 = vec_add(b0v, b7v); \
 152     /* DST(1,    b2 + b5); */ \
 153     d1 = vec_add(b2v, b5v); \
 154     /* DST(2,    b4 + b3); */ \
 155     d2 = vec_add(b4v, b3v); \
 156     /* DST(3,    b6 + b1); */ \
 157     d3 = vec_add(b6v, b1v); \
 158     /* DST(4,    b6 - b1); */ \
 159     d4 = vec_sub(b6v, b1v); \
 160     /* DST(5,    b4 - b3); */ \
 161     d5 = vec_sub(b4v, b3v); \
 162     /* DST(6,    b2 - b5); */ \
 163     d6 = vec_sub(b2v, b5v); \
 164     /* DST(7,    b0 - b7); */ \
 165     d7 = vec_sub(b0v, b7v); \
 166 }
 167
 168 #define ALTIVEC_STORE_SUM_CLIP(dest, idctv, perm_ldv, perm_stv, sel) { \
 169     /* unaligned load */                                       \
 170     vec_u8 hv = vec_ld( 0, dest );                           \
 171     vec_u8 lv = vec_ld( 7, dest );                           \
 172     vec_u8 dstv   = vec_perm( hv, lv, (vec_u8)perm_ldv );  \
 173     vec_s16 idct_sh6 = vec_sra(idctv, sixv);                 \
 174     vec_u16 dst16 = (vec_u16)vec_mergeh(zero_u8v, dstv);   \
 175     vec_s16 idstsum = vec_adds(idct_sh6, (vec_s16)dst16);  \
 176     vec_u8 idstsum8 = vec_packsu(zero_s16v, idstsum);        \
 177     vec_u8 edgehv;                                           \
 178     /* unaligned store */                                      \
 179     vec_u8 bodyv  = vec_perm( idstsum8, idstsum8, perm_stv );\
 180     vec_u8 edgelv = vec_perm( sel, zero_u8v, perm_stv );     \
 181     lv    = vec_sel( lv, bodyv, edgelv );                      \
 182     vec_st( lv, 7, dest );                                     \
 183     hv    = vec_ld( 0, dest );                                 \
 184     edgehv = vec_perm( zero_u8v, sel, perm_stv );              \
 185     hv    = vec_sel( hv, bodyv, edgehv );                      \
 186     vec_st( hv, 0, dest );                                     \
 187  }
 188
 189 static void h264_idct8_add_altivec(uint8_t *dst, int16_t *dct, int stride)
 190 {
 191     vec_s16 s0, s1, s2, s3, s4, s5, s6, s7;
 192     vec_s16 d0, d1, d2, d3, d4, d5, d6, d7;
 193     vec_s16 idct0, idct1, idct2, idct3, idct4, idct5, idct6, idct7;
 194
 195     vec_u8 perm_ldv = vec_lvsl(0, dst);
 196     vec_u8 perm_stv = vec_lvsr(8, dst);
 197
 198     const vec_u16 onev = vec_splat_u16(1);
 199     const vec_u16 twov = vec_splat_u16(2);
 200     const vec_u16 sixv = vec_splat_u16(6);
 201
 202     const vec_u8 sel = (vec_u8) {0,0,0,0,0,0,0,0,-1,-1,-1,-1,-1,-1,-1,-1};
 203     LOAD_ZERO;
 204
 205     dct[0] += 32; // rounding for the >>6 at the end
 206
 207     s0 = vec_ld(0x00, (int16_t*)dct);
 208     s1 = vec_ld(0x10, (int16_t*)dct);
 209     s2 = vec_ld(0x20, (int16_t*)dct);
 210     s3 = vec_ld(0x30, (int16_t*)dct);
 211     s4 = vec_ld(0x40, (int16_t*)dct);
 212     s5 = vec_ld(0x50, (int16_t*)dct);
 213     s6 = vec_ld(0x60, (int16_t*)dct);
 214     s7 = vec_ld(0x70, (int16_t*)dct);
 215     memset(dct, 0, 64 * sizeof(int16_t));
 216
 217     IDCT8_1D_ALTIVEC(s0, s1, s2, s3, s4, s5, s6, s7,
 218                      d0, d1, d2, d3, d4, d5, d6, d7);
 219
 220     TRANSPOSE8( d0,  d1,  d2,  d3,  d4,  d5,  d6, d7 );
 221
 222     IDCT8_1D_ALTIVEC(d0,  d1,  d2,  d3,  d4,  d5,  d6, d7,
 223                      idct0, idct1, idct2, idct3, idct4, idct5, idct6, idct7);
 224
 225     ALTIVEC_STORE_SUM_CLIP(&dst[0*stride], idct0, perm_ldv, perm_stv, sel);
 226     ALTIVEC_STORE_SUM_CLIP(&dst[1*stride], idct1, perm_ldv, perm_stv, sel);
 227     ALTIVEC_STORE_SUM_CLIP(&dst[2*stride], idct2, perm_ldv, perm_stv, sel);
 228     ALTIVEC_STORE_SUM_CLIP(&dst[3*stride], idct3, perm_ldv, perm_stv, sel);
 229     ALTIVEC_STORE_SUM_CLIP(&dst[4*stride], idct4, perm_ldv, perm_stv, sel);
 230     ALTIVEC_STORE_SUM_CLIP(&dst[5*stride], idct5, perm_ldv, perm_stv, sel);
 231     ALTIVEC_STORE_SUM_CLIP(&dst[6*stride], idct6, perm_ldv, perm_stv, sel);
 232     ALTIVEC_STORE_SUM_CLIP(&dst[7*stride], idct7, perm_ldv, perm_stv, sel);
 233 }
 234
 235 static av_always_inline void h264_idct_dc_add_internal(uint8_t *dst, int16_t *block, int stride, int size)
 236 {
 237     vec_s16 dc16;
 238     vec_u8 dcplus, dcminus, v0, v1, v2, v3, aligner;
 239     LOAD_ZERO;
 240     DECLARE_ALIGNED(16, int, dc);
 241     int i;
 242
 243     dc = (block[0] + 32) >> 6;
 244     block[0] = 0;
 245     dc16 = vec_splat((vec_s16) vec_lde(0, &dc), 1);
 246
 247     if (size == 4)
 248         dc16 = vec_sld(dc16, zero_s16v, 8);
 249     dcplus = vec_packsu(dc16, zero_s16v);
 250     dcminus = vec_packsu(vec_sub(zero_s16v, dc16), zero_s16v);
 251
 252     aligner = vec_lvsr(0, dst);
 253     dcplus = vec_perm(dcplus, dcplus, aligner);
 254     dcminus = vec_perm(dcminus, dcminus, aligner);
 255
 256     for (i = 0; i < size; i += 4) {
 257         v0 = vec_ld(0, dst+0*stride);
 258         v1 = vec_ld(0, dst+1*stride);
 259         v2 = vec_ld(0, dst+2*stride);
 260         v3 = vec_ld(0, dst+3*stride);
 261
 262         v0 = vec_adds(v0, dcplus);
 263         v1 = vec_adds(v1, dcplus);
 264         v2 = vec_adds(v2, dcplus);
 265         v3 = vec_adds(v3, dcplus);
 266
 267         v0 = vec_subs(v0, dcminus);
 268         v1 = vec_subs(v1, dcminus);
 269         v2 = vec_subs(v2, dcminus);
 270         v3 = vec_subs(v3, dcminus);
 271
 272         vec_st(v0, 0, dst+0*stride);
 273         vec_st(v1, 0, dst+1*stride);
 274         vec_st(v2, 0, dst+2*stride);
 275         vec_st(v3, 0, dst+3*stride);
 276
 277         dst += 4*stride;
 278     }
 279 }
 280
 281 static void h264_idct_dc_add_altivec(uint8_t *dst, int16_t *block, int stride)
 282 {
 283     h264_idct_dc_add_internal(dst, block, stride, 4);
 284 }
 285
 286 static void h264_idct8_dc_add_altivec(uint8_t *dst, int16_t *block, int stride)
 287 {
 288     h264_idct_dc_add_internal(dst, block, stride, 8);
 289 }
 290
 291 static void h264_idct_add16_altivec(uint8_t *dst, const int *block_offset,
 292                                     int16_t *block, int stride,
 293                                     const uint8_t nnzc[15 * 8])
 294 {
 295     int i;
 296     for(i=0; i<16; i++){
 297         int nnz = nnzc[ scan8[i] ];
 298         if(nnz){
 299             if(nnz==1 && block[i*16]) h264_idct_dc_add_altivec(dst + block_offset[i], block + i*16, stride);
 300             else                      h264_idct_add_altivec(dst + block_offset[i], block + i*16, stride);
 301         }
 302     }
 303 }
 304
 305 static void h264_idct_add16intra_altivec(uint8_t *dst, const int *block_offset,
 306                                          int16_t *block, int stride,
 307                                          const uint8_t nnzc[15 * 8])
 308 {
 309     int i;
 310     for(i=0; i<16; i++){
 311         if(nnzc[ scan8[i] ]) h264_idct_add_altivec(dst + block_offset[i], block + i*16, stride);
 312         else if(block[i*16]) h264_idct_dc_add_altivec(dst + block_offset[i], block + i*16, stride);
 313     }
 314 }
 315
 316 static void h264_idct8_add4_altivec(uint8_t *dst, const int *block_offset,
 317                                     int16_t *block, int stride,
 318                                     const uint8_t nnzc[15 * 8])
 319 {
 320     int i;
 321     for(i=0; i<16; i+=4){
 322         int nnz = nnzc[ scan8[i] ];
 323         if(nnz){
 324             if(nnz==1 && block[i*16]) h264_idct8_dc_add_altivec(dst + block_offset[i], block + i*16, stride);
 325             else                      h264_idct8_add_altivec(dst + block_offset[i], block + i*16, stride);
 326         }
 327     }
 328 }
 329
 330 static void h264_idct_add8_altivec(uint8_t **dest, const int *block_offset,
 331                                    int16_t *block, int stride,
 332                                    const uint8_t nnzc[15 * 8])
 333 {
 334     int i, j;
 335     for (j = 1; j < 3; j++) {
 336         for(i = j * 16; i < j * 16 + 4; i++){
 337             if(nnzc[ scan8[i] ])
 338                 h264_idct_add_altivec(dest[j-1] + block_offset[i], block + i*16, stride);
 339             else if(block[i*16])
 340                 h264_idct_dc_add_altivec(dest[j-1] + block_offset[i], block + i*16, stride);
 341         }
 342     }
 343 }
 344
 345 #define transpose4x16(r0, r1, r2, r3) {      \
 346     register vec_u8 r4;                    \
 347     register vec_u8 r5;                    \
 348     register vec_u8 r6;                    \
 349     register vec_u8 r7;                    \
 350                                              \
 351     r4 = vec_mergeh(r0, r2);  /*0, 2 set 0*/ \
 352     r5 = vec_mergel(r0, r2);  /*0, 2 set 1*/ \
 353     r6 = vec_mergeh(r1, r3);  /*1, 3 set 0*/ \
 354     r7 = vec_mergel(r1, r3);  /*1, 3 set 1*/ \
 355                                              \
 356     r0 = vec_mergeh(r4, r6);  /*all set 0*/  \
 357     r1 = vec_mergel(r4, r6);  /*all set 1*/  \
 358     r2 = vec_mergeh(r5, r7);  /*all set 2*/  \
 359     r3 = vec_mergel(r5, r7);  /*all set 3*/  \
 360 }
 361
 362 static inline void write16x4(uint8_t *dst, int dst_stride,
 363                              register vec_u8 r0, register vec_u8 r1,
 364                              register vec_u8 r2, register vec_u8 r3) {
 365     DECLARE_ALIGNED(16, unsigned char, result)[64];
 366     uint32_t *src_int = (uint32_t *)result, *dst_int = (uint32_t *)dst;
 367     int int_dst_stride = dst_stride/4;
 368
 369     vec_st(r0, 0, result);
 370     vec_st(r1, 16, result);
 371     vec_st(r2, 32, result);
 372     vec_st(r3, 48, result);
 373     /* FIXME: there has to be a better way!!!! */
 374     *dst_int = *src_int;
 375     *(dst_int+   int_dst_stride) = *(src_int + 1);
 376     *(dst_int+ 2*int_dst_stride) = *(src_int + 2);
 377     *(dst_int+ 3*int_dst_stride) = *(src_int + 3);
 378     *(dst_int+ 4*int_dst_stride) = *(src_int + 4);
 379     *(dst_int+ 5*int_dst_stride) = *(src_int + 5);
 380     *(dst_int+ 6*int_dst_stride) = *(src_int + 6);
 381     *(dst_int+ 7*int_dst_stride) = *(src_int + 7);
 382     *(dst_int+ 8*int_dst_stride) = *(src_int + 8);
 383     *(dst_int+ 9*int_dst_stride) = *(src_int + 9);
 384     *(dst_int+10*int_dst_stride) = *(src_int + 10);
 385     *(dst_int+11*int_dst_stride) = *(src_int + 11);
 386     *(dst_int+12*int_dst_stride) = *(src_int + 12);
 387     *(dst_int+13*int_dst_stride) = *(src_int + 13);
 388     *(dst_int+14*int_dst_stride) = *(src_int + 14);
 389     *(dst_int+15*int_dst_stride) = *(src_int + 15);
 390 }
 391
 392 /** @brief performs a 6x16 transpose of data in src, and stores it to dst
 393     @todo FIXME: see if we can't spare some vec_lvsl() by them factorizing
 394     out of unaligned_load() */
 395 #define readAndTranspose16x6(src, src_stride, r8, r9, r10, r11, r12, r13) {\
 396     register vec_u8 r0  = unaligned_load(0,             src);            \
 397     register vec_u8 r1  = unaligned_load(   src_stride, src);            \
 398     register vec_u8 r2  = unaligned_load(2* src_stride, src);            \
 399     register vec_u8 r3  = unaligned_load(3* src_stride, src);            \
 400     register vec_u8 r4  = unaligned_load(4* src_stride, src);            \
 401     register vec_u8 r5  = unaligned_load(5* src_stride, src);            \
 402     register vec_u8 r6  = unaligned_load(6* src_stride, src);            \
 403     register vec_u8 r7  = unaligned_load(7* src_stride, src);            \
 404     register vec_u8 r14 = unaligned_load(14*src_stride, src);            \
 405     register vec_u8 r15 = unaligned_load(15*src_stride, src);            \
 406                                                                            \
 407     r8  = unaligned_load( 8*src_stride, src);                              \
 408     r9  = unaligned_load( 9*src_stride, src);                              \
 409     r10 = unaligned_load(10*src_stride, src);                              \
 410     r11 = unaligned_load(11*src_stride, src);                              \
 411     r12 = unaligned_load(12*src_stride, src);                              \
 412     r13 = unaligned_load(13*src_stride, src);                              \
 413                                                                            \
 414     /*Merge first pairs*/                                                  \
 415     r0 = vec_mergeh(r0, r8);    /*0, 8*/                                   \
 416     r1 = vec_mergeh(r1, r9);    /*1, 9*/                                   \
 417     r2 = vec_mergeh(r2, r10);   /*2,10*/                                   \
 418     r3 = vec_mergeh(r3, r11);   /*3,11*/                                   \
 419     r4 = vec_mergeh(r4, r12);   /*4,12*/                                   \
 420     r5 = vec_mergeh(r5, r13);   /*5,13*/                                   \
 421     r6 = vec_mergeh(r6, r14);   /*6,14*/                                   \
 422     r7 = vec_mergeh(r7, r15);   /*7,15*/                                   \
 423                                                                            \
 424     /*Merge second pairs*/                                                 \
 425     r8  = vec_mergeh(r0, r4);   /*0,4, 8,12 set 0*/                        \
 426     r9  = vec_mergel(r0, r4);   /*0,4, 8,12 set 1*/                        \
 427     r10 = vec_mergeh(r1, r5);   /*1,5, 9,13 set 0*/                        \
 428     r11 = vec_mergel(r1, r5);   /*1,5, 9,13 set 1*/                        \
 429     r12 = vec_mergeh(r2, r6);   /*2,6,10,14 set 0*/                        \
 430     r13 = vec_mergel(r2, r6);   /*2,6,10,14 set 1*/                        \
 431     r14 = vec_mergeh(r3, r7);   /*3,7,11,15 set 0*/                        \
 432     r15 = vec_mergel(r3, r7);   /*3,7,11,15 set 1*/                        \
 433                                                                            \
 434     /*Third merge*/                                                        \
 435     r0 = vec_mergeh(r8,  r12);  /*0,2,4,6,8,10,12,14 set 0*/               \
 436     r1 = vec_mergel(r8,  r12);  /*0,2,4,6,8,10,12,14 set 1*/               \
 437     r2 = vec_mergeh(r9,  r13);  /*0,2,4,6,8,10,12,14 set 2*/               \
 438     r4 = vec_mergeh(r10, r14);  /*1,3,5,7,9,11,13,15 set 0*/               \
 439     r5 = vec_mergel(r10, r14);  /*1,3,5,7,9,11,13,15 set 1*/               \
 440     r6 = vec_mergeh(r11, r15);  /*1,3,5,7,9,11,13,15 set 2*/               \
 441     /* Don't need to compute 3 and 7*/                                     \
 442                                                                            \
 443     /*Final merge*/                                                        \
 444     r8  = vec_mergeh(r0, r4);   /*all set 0*/                              \
 445     r9  = vec_mergel(r0, r4);   /*all set 1*/                              \
 446     r10 = vec_mergeh(r1, r5);   /*all set 2*/                              \
 447     r11 = vec_mergel(r1, r5);   /*all set 3*/                              \
 448     r12 = vec_mergeh(r2, r6);   /*all set 4*/                              \
 449     r13 = vec_mergel(r2, r6);   /*all set 5*/                              \
 450     /* Don't need to compute 14 and 15*/                                   \
 451                                                                            \
 452 }
 453
 454 // out: o = |x-y| < a
 455 static inline vec_u8 diff_lt_altivec ( register vec_u8 x,
 456                                          register vec_u8 y,
 457                                          register vec_u8 a) {
 458
 459     register vec_u8 diff = vec_subs(x, y);
 460     register vec_u8 diffneg = vec_subs(y, x);
 461     register vec_u8 o = vec_or(diff, diffneg); /* |x-y| */
 462     o = (vec_u8)vec_cmplt(o, a);
 463     return o;
 464 }
 465
 466 static inline vec_u8 h264_deblock_mask ( register vec_u8 p0,
 467                                            register vec_u8 p1,
 468                                            register vec_u8 q0,
 469                                            register vec_u8 q1,
 470                                            register vec_u8 alpha,
 471                                            register vec_u8 beta) {
 472
 473     register vec_u8 mask;
 474     register vec_u8 tempmask;
 475
 476     mask = diff_lt_altivec(p0, q0, alpha);
 477     tempmask = diff_lt_altivec(p1, p0, beta);
 478     mask = vec_and(mask, tempmask);
 479     tempmask = diff_lt_altivec(q1, q0, beta);
 480     mask = vec_and(mask, tempmask);
 481
 482     return mask;
 483 }
 484
 485 // out: newp1 = clip((p2 + ((p0 + q0 + 1) >> 1)) >> 1, p1-tc0, p1+tc0)
 486 static inline vec_u8 h264_deblock_q1(register vec_u8 p0,
 487                                        register vec_u8 p1,
 488                                        register vec_u8 p2,
 489                                        register vec_u8 q0,
 490                                        register vec_u8 tc0) {
 491
 492     register vec_u8 average = vec_avg(p0, q0);
 493     register vec_u8 temp;
 494     register vec_u8 uncliped;
 495     register vec_u8 ones;
 496     register vec_u8 max;
 497     register vec_u8 min;
 498     register vec_u8 newp1;
 499
 500     temp = vec_xor(average, p2);
 501     average = vec_avg(average, p2);     /*avg(p2, avg(p0, q0)) */
 502     ones = vec_splat_u8(1);
 503     temp = vec_and(temp, ones);         /*(p2^avg(p0, q0)) & 1 */
 504     uncliped = vec_subs(average, temp); /*(p2+((p0+q0+1)>>1))>>1 */
 505     max = vec_adds(p1, tc0);
 506     min = vec_subs(p1, tc0);
 507     newp1 = vec_max(min, uncliped);
 508     newp1 = vec_min(max, newp1);
 509     return newp1;
 510 }
 511
 512 #define h264_deblock_p0_q0(p0, p1, q0, q1, tc0masked) {                                           \
 513                                                                                                   \
 514     const vec_u8 A0v = vec_sl(vec_splat_u8(10), vec_splat_u8(4));                               \
 515                                                                                                   \
 516     register vec_u8 pq0bit = vec_xor(p0,q0);                                                    \
 517     register vec_u8 q1minus;                                                                    \
 518     register vec_u8 p0minus;                                                                    \
 519     register vec_u8 stage1;                                                                     \
 520     register vec_u8 stage2;                                                                     \
 521     register vec_u8 vec160;                                                                     \
 522     register vec_u8 delta;                                                                      \
 523     register vec_u8 deltaneg;                                                                   \
 524                                                                                                   \
 525     q1minus = vec_nor(q1, q1);                 /* 255 - q1 */                                     \
 526     stage1 = vec_avg(p1, q1minus);             /* (p1 - q1 + 256)>>1 */                           \
 527     stage2 = vec_sr(stage1, vec_splat_u8(1));  /* (p1 - q1 + 256)>>2 = 64 + (p1 - q1) >> 2 */     \
 528     p0minus = vec_nor(p0, p0);                 /* 255 - p0 */                                     \
 529     stage1 = vec_avg(q0, p0minus);             /* (q0 - p0 + 256)>>1 */                           \
 530     pq0bit = vec_and(pq0bit, vec_splat_u8(1));                                                    \
 531     stage2 = vec_avg(stage2, pq0bit);          /* 32 + ((q0 - p0)&1 + (p1 - q1) >> 2 + 1) >> 1 */ \
 532     stage2 = vec_adds(stage2, stage1);         /* 160 + ((p0 - q0) + (p1 - q1) >> 2 + 1) >> 1 */  \
 533     vec160 = vec_ld(0, &A0v);                                                                     \
 534     deltaneg = vec_subs(vec160, stage2);       /* -d */                                           \
 535     delta = vec_subs(stage2, vec160);          /* d */                                            \
 536     deltaneg = vec_min(tc0masked, deltaneg);                                                      \
 537     delta = vec_min(tc0masked, delta);                                                            \
 538     p0 = vec_subs(p0, deltaneg);                                                                  \
 539     q0 = vec_subs(q0, delta);                                                                     \
 540     p0 = vec_adds(p0, delta);                                                                     \
 541     q0 = vec_adds(q0, deltaneg);                                                                  \
 542 }
 543
 544 #define h264_loop_filter_luma_altivec(p2, p1, p0, q0, q1, q2, alpha, beta, tc0) {            \
 545     DECLARE_ALIGNED(16, unsigned char, temp)[16];                                             \
 546     register vec_u8 alphavec;                                                              \
 547     register vec_u8 betavec;                                                               \
 548     register vec_u8 mask;                                                                  \
 549     register vec_u8 p1mask;                                                                \
 550     register vec_u8 q1mask;                                                                \
 551     register vector signed   char tc0vec;                                                    \
 552     register vec_u8 finaltc0;                                                              \
 553     register vec_u8 tc0masked;                                                             \
 554     register vec_u8 newp1;                                                                 \
 555     register vec_u8 newq1;                                                                 \
 556                                                                                              \
 557     temp[0] = alpha;                                                                         \
 558     temp[1] = beta;                                                                          \
 559     alphavec = vec_ld(0, temp);                                                              \
 560     betavec = vec_splat(alphavec, 0x1);                                                      \
 561     alphavec = vec_splat(alphavec, 0x0);                                                     \
 562     mask = h264_deblock_mask(p0, p1, q0, q1, alphavec, betavec); /*if in block */            \
 563                                                                                              \
 564     AV_COPY32(temp, tc0);                                                                    \
 565     tc0vec = vec_ld(0, (signed char*)temp);                                                  \
 566     tc0vec = vec_mergeh(tc0vec, tc0vec);                                                     \
 567     tc0vec = vec_mergeh(tc0vec, tc0vec);                                                     \
 568     mask = vec_and(mask, vec_cmpgt(tc0vec, vec_splat_s8(-1)));  /* if tc0[i] >= 0 */         \
 569     finaltc0 = vec_and((vec_u8)tc0vec, mask);     /* tc = tc0 */                           \
 570                                                                                              \
 571     p1mask = diff_lt_altivec(p2, p0, betavec);                                               \
 572     p1mask = vec_and(p1mask, mask);                             /* if ( |p2 - p0| < beta) */ \
 573     tc0masked = vec_and(p1mask, (vec_u8)tc0vec);                                           \
 574     finaltc0 = vec_sub(finaltc0, p1mask);                       /* tc++ */                   \
 575     newp1 = h264_deblock_q1(p0, p1, p2, q0, tc0masked);                                      \
 576     /*end if*/                                                                               \
 577                                                                                              \
 578     q1mask = diff_lt_altivec(q2, q0, betavec);                                               \
 579     q1mask = vec_and(q1mask, mask);                             /* if ( |q2 - q0| < beta ) */\
 580     tc0masked = vec_and(q1mask, (vec_u8)tc0vec);                                           \
 581     finaltc0 = vec_sub(finaltc0, q1mask);                       /* tc++ */                   \
 582     newq1 = h264_deblock_q1(p0, q1, q2, q0, tc0masked);                                      \
 583     /*end if*/                                                                               \
 584                                                                                              \
 585     h264_deblock_p0_q0(p0, p1, q0, q1, finaltc0);                                            \
 586     p1 = newp1;                                                                              \
 587     q1 = newq1;                                                                              \
 588 }
 589
 590 static void h264_v_loop_filter_luma_altivec(uint8_t *pix, int stride, int alpha, int beta, int8_t *tc0) {
 591
 592     if ((tc0[0] & tc0[1] & tc0[2] & tc0[3]) >= 0) {
 593         register vec_u8 p2 = vec_ld(-3*stride, pix);
 594         register vec_u8 p1 = vec_ld(-2*stride, pix);
 595         register vec_u8 p0 = vec_ld(-1*stride, pix);
 596         register vec_u8 q0 = vec_ld(0, pix);
 597         register vec_u8 q1 = vec_ld(stride, pix);
 598         register vec_u8 q2 = vec_ld(2*stride, pix);
 599         h264_loop_filter_luma_altivec(p2, p1, p0, q0, q1, q2, alpha, beta, tc0);
 600         vec_st(p1, -2*stride, pix);
 601         vec_st(p0, -1*stride, pix);
 602         vec_st(q0, 0, pix);
 603         vec_st(q1, stride, pix);
 604     }
 605 }
 606
 607 static void h264_h_loop_filter_luma_altivec(uint8_t *pix, int stride, int alpha, int beta, int8_t *tc0) {
 608
 609     register vec_u8 line0, line1, line2, line3, line4, line5;
 610     if ((tc0[0] & tc0[1] & tc0[2] & tc0[3]) < 0)
 611         return;
 612     readAndTranspose16x6(pix-3, stride, line0, line1, line2, line3, line4, line5);
 613     h264_loop_filter_luma_altivec(line0, line1, line2, line3, line4, line5, alpha, beta, tc0);
 614     transpose4x16(line1, line2, line3, line4);
 615     write16x4(pix-2, stride, line1, line2, line3, line4);
 616 }
 617
 618 static av_always_inline
 619 void weight_h264_W_altivec(uint8_t *block, int stride, int height,
 620                            int log2_denom, int weight, int offset, int w)
 621 {
 622     int y, aligned;
 623     vec_u8 vblock;
 624     vec_s16 vtemp, vweight, voffset, v0, v1;
 625     vec_u16 vlog2_denom;
 626     DECLARE_ALIGNED(16, int32_t, temp)[4];
 627     LOAD_ZERO;
 628
 629     offset <<= log2_denom;
 630     if(log2_denom) offset += 1<<(log2_denom-1);
 631     temp[0] = log2_denom;
 632     temp[1] = weight;
 633     temp[2] = offset;
 634
 635     vtemp = (vec_s16)vec_ld(0, temp);
 636     vlog2_denom = (vec_u16)vec_splat(vtemp, 1);
 637     vweight = vec_splat(vtemp, 3);
 638     voffset = vec_splat(vtemp, 5);
 639     aligned = !((unsigned long)block & 0xf);
 640
 641     for (y = 0; y < height; y++) {
 642         vblock = vec_ld(0, block);
 643
 644         v0 = (vec_s16)vec_mergeh(zero_u8v, vblock);
 645         v1 = (vec_s16)vec_mergel(zero_u8v, vblock);
 646
 647         if (w == 16 || aligned) {
 648             v0 = vec_mladd(v0, vweight, zero_s16v);
 649             v0 = vec_adds(v0, voffset);
 650             v0 = vec_sra(v0, vlog2_denom);
 651         }
 652         if (w == 16 || !aligned) {
 653             v1 = vec_mladd(v1, vweight, zero_s16v);
 654             v1 = vec_adds(v1, voffset);
 655             v1 = vec_sra(v1, vlog2_denom);
 656         }
 657         vblock = vec_packsu(v0, v1);
 658         vec_st(vblock, 0, block);
 659
 660         block += stride;
 661     }
 662 }
 663
 664 static av_always_inline
 665 void biweight_h264_W_altivec(uint8_t *dst, uint8_t *src, int stride, int height,
 666                              int log2_denom, int weightd, int weights, int offset, int w)
 667 {
 668     int y, dst_aligned, src_aligned;
 669     vec_u8 vsrc, vdst;
 670     vec_s16 vtemp, vweights, vweightd, voffset, v0, v1, v2, v3;
 671     vec_u16 vlog2_denom;
 672     DECLARE_ALIGNED(16, int32_t, temp)[4];
 673     LOAD_ZERO;
 674
 675     offset = ((offset + 1) | 1) << log2_denom;
 676     temp[0] = log2_denom+1;
 677     temp[1] = weights;
 678     temp[2] = weightd;
 679     temp[3] = offset;
 680
 681     vtemp = (vec_s16)vec_ld(0, temp);
 682     vlog2_denom = (vec_u16)vec_splat(vtemp, 1);
 683     vweights = vec_splat(vtemp, 3);
 684     vweightd = vec_splat(vtemp, 5);
 685     voffset = vec_splat(vtemp, 7);
 686     dst_aligned = !((unsigned long)dst & 0xf);
 687     src_aligned = !((unsigned long)src & 0xf);
 688
 689     for (y = 0; y < height; y++) {
 690         vdst = vec_ld(0, dst);
 691         vsrc = vec_ld(0, src);
 692
 693         v0 = (vec_s16)vec_mergeh(zero_u8v, vdst);
 694         v1 = (vec_s16)vec_mergel(zero_u8v, vdst);
 695         v2 = (vec_s16)vec_mergeh(zero_u8v, vsrc);
 696         v3 = (vec_s16)vec_mergel(zero_u8v, vsrc);
 697
 698         if (w == 8) {
 699             if (src_aligned)
 700                 v3 = v2;
 701             else
 702                 v2 = v3;
 703         }
 704
 705         if (w == 16 || dst_aligned) {
 706             v0 = vec_mladd(v0, vweightd, zero_s16v);
 707             v2 = vec_mladd(v2, vweights, zero_s16v);
 708
 709             v0 = vec_adds(v0, voffset);
 710             v0 = vec_adds(v0, v2);
 711             v0 = vec_sra(v0, vlog2_denom);
 712         }
 713         if (w == 16 || !dst_aligned) {
 714             v1 = vec_mladd(v1, vweightd, zero_s16v);
 715             v3 = vec_mladd(v3, vweights, zero_s16v);
 716
 717             v1 = vec_adds(v1, voffset);
 718             v1 = vec_adds(v1, v3);
 719             v1 = vec_sra(v1, vlog2_denom);
 720         }
 721         vdst = vec_packsu(v0, v1);
 722         vec_st(vdst, 0, dst);
 723
 724         dst += stride;
 725         src += stride;
 726     }
 727 }
 728
 729 #define H264_WEIGHT(W) \
 730 static void weight_h264_pixels ## W ## _altivec(uint8_t *block, int stride, int height, \
 731                                                 int log2_denom, int weight, int offset) \
 732 { \
 733     weight_h264_W_altivec(block, stride, height, log2_denom, weight, offset, W); \
 734 }\
 735 static void biweight_h264_pixels ## W ## _altivec(uint8_t *dst, uint8_t *src, int stride, int height, \
 736                                                   int log2_denom, int weightd, int weights, int offset) \
 737 { \
 738     biweight_h264_W_altivec(dst, src, stride, height, log2_denom, weightd, weights, offset, W); \
 739 }
 740
 741 H264_WEIGHT(16)
 742 H264_WEIGHT( 8)
 743 #endif /* HAVE_ALTIVEC */
 744
 745 av_cold void ff_h264dsp_init_ppc(H264DSPContext *c, const int bit_depth,
 746                                  const int chroma_format_idc)
 747 {
 748 #if HAVE_ALTIVEC
 749     if (!PPC_ALTIVEC(av_get_cpu_flags()))
 750         return;
 751
 752     if (bit_depth == 8) {
 753         c->h264_idct_add = h264_idct_add_altivec;
 754         if (chroma_format_idc <= 1)
 755             c->h264_idct_add8 = h264_idct_add8_altivec;
 756         c->h264_idct_add16      = h264_idct_add16_altivec;
 757         c->h264_idct_add16intra = h264_idct_add16intra_altivec;
 758         c->h264_idct_dc_add= h264_idct_dc_add_altivec;
 759         c->h264_idct8_dc_add = h264_idct8_dc_add_altivec;
 760         c->h264_idct8_add    = h264_idct8_add_altivec;
 761         c->h264_idct8_add4   = h264_idct8_add4_altivec;
 762         c->h264_v_loop_filter_luma= h264_v_loop_filter_luma_altivec;
 763         c->h264_h_loop_filter_luma= h264_h_loop_filter_luma_altivec;
 764
 765         c->weight_h264_pixels_tab[0]   = weight_h264_pixels16_altivec;
 766         c->weight_h264_pixels_tab[1]   = weight_h264_pixels8_altivec;
 767         c->biweight_h264_pixels_tab[0] = biweight_h264_pixels16_altivec;
 768         c->biweight_h264_pixels_tab[1] = biweight_h264_pixels8_altivec;
 769     }
 770 #endif /* HAVE_ALTIVEC */
 771 }