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FFmpeg/libavcodec/ppc/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 "libavcodec/dsputil.h"

  23. 

  24. #include "util_altivec.h"

  25. 

  26. // main steps of 8x8 transform

  27. #define STEP8(s0, s1, s2, s3, s4, s5, s6, s7, vec_rnd) \

  28. do { \

  29.     t0 = vec_sl(vec_add(s0, s4), vec_2); \

  30.     t0 = vec_add(vec_sl(t0, vec_1), t0); \

  31.     t0 = vec_add(t0, vec_rnd); \

  32.     t1 = vec_sl(vec_sub(s0, s4), vec_2); \

  33.     t1 = vec_add(vec_sl(t1, vec_1), t1); \

  34.     t1 = vec_add(t1, vec_rnd); \

  35.     t2 = vec_add(vec_sl(s6, vec_2), vec_sl(s6, vec_1)); \

  36.     t2 = vec_add(t2, vec_sl(s2, vec_4)); \

  37.     t3 = vec_add(vec_sl(s2, vec_2), vec_sl(s2, vec_1)); \

  38.     t3 = vec_sub(t3, vec_sl(s6, vec_4)); \

  39.     t4 = vec_add(t0, t2); \

  40.     t5 = vec_add(t1, t3); \

  41.     t6 = vec_sub(t1, t3); \

  42.     t7 = vec_sub(t0, t2); \

  43. \

  44.     t0 = vec_sl(vec_add(s1, s3), vec_4); \

  45.     t0 = vec_add(t0, vec_sl(s5, vec_3)); \

  46.     t0 = vec_add(t0, vec_sl(s7, vec_2)); \

  47.     t0 = vec_add(t0, vec_sub(s5, s3)); \

  48. \

  49.     t1 = vec_sl(vec_sub(s1, s5), vec_4); \

  50.     t1 = vec_sub(t1, vec_sl(s7, vec_3)); \

  51.     t1 = vec_sub(t1, vec_sl(s3, vec_2)); \

  52.     t1 = vec_sub(t1, vec_add(s1, s7)); \

  53. \

  54.     t2 = vec_sl(vec_sub(s7, s3), vec_4); \

  55.     t2 = vec_add(t2, vec_sl(s1, vec_3)); \

  56.     t2 = vec_add(t2, vec_sl(s5, vec_2)); \

  57.     t2 = vec_add(t2, vec_sub(s1, s7)); \

  58. \

  59.     t3 = vec_sl(vec_sub(s5, s7), vec_4); \

  60.     t3 = vec_sub(t3, vec_sl(s3, vec_3)); \

  61.     t3 = vec_add(t3, vec_sl(s1, vec_2)); \

  62.     t3 = vec_sub(t3, vec_add(s3, s5)); \

  63. \

  64.     s0 = vec_add(t4, t0); \

  65.     s1 = vec_add(t5, t1); \

  66.     s2 = vec_add(t6, t2); \

  67.     s3 = vec_add(t7, t3); \

  68.     s4 = vec_sub(t7, t3); \

  69.     s5 = vec_sub(t6, t2); \

  70.     s6 = vec_sub(t5, t1); \

  71.     s7 = vec_sub(t4, t0); \

  72. }while(0)

  73. 

  74. #define SHIFT_HOR8(s0, s1, s2, s3, s4, s5, s6, s7) \

  75. do { \

  76.     s0 = vec_sra(s0, vec_3); \

  77.     s1 = vec_sra(s1, vec_3); \

  78.     s2 = vec_sra(s2, vec_3); \

  79.     s3 = vec_sra(s3, vec_3); \

  80.     s4 = vec_sra(s4, vec_3); \

  81.     s5 = vec_sra(s5, vec_3); \

  82.     s6 = vec_sra(s6, vec_3); \

  83.     s7 = vec_sra(s7, vec_3); \

  84. }while(0)

  85. 

  86. #define SHIFT_VERT8(s0, s1, s2, s3, s4, s5, s6, s7) \

  87. do { \

  88.     s0 = vec_sra(s0, vec_7); \

  89.     s1 = vec_sra(s1, vec_7); \

  90.     s2 = vec_sra(s2, vec_7); \

  91.     s3 = vec_sra(s3, vec_7); \

  92.     s4 = vec_sra(vec_add(s4, vec_1s), vec_7); \

  93.     s5 = vec_sra(vec_add(s5, vec_1s), vec_7); \

  94.     s6 = vec_sra(vec_add(s6, vec_1s), vec_7); \

  95.     s7 = vec_sra(vec_add(s7, vec_1s), vec_7); \

  96. }while(0)

  97. 

  98. /* main steps of 4x4 transform */

  99. #define STEP4(s0, s1, s2, s3, vec_rnd) \

  100. do { \

  101.     t1 = vec_add(vec_sl(s0, vec_4), s0); \

  102.     t1 = vec_add(t1, vec_rnd); \

  103.     t2 = vec_add(vec_sl(s2, vec_4), s2); \

  104.     t0 = vec_add(t1, t2); \

  105.     t1 = vec_sub(t1, t2); \

  106.     t3 = vec_sl(vec_sub(s3, s1), vec_1); \

  107.     t3 = vec_add(t3, vec_sl(t3, vec_2)); \

  108.     t2 = vec_add(t3, vec_sl(s1, vec_5)); \

  109.     t3 = vec_add(t3, vec_sl(s3, vec_3)); \

  110.     t3 = vec_add(t3, vec_sl(s3, vec_2)); \

  111.     s0 = vec_add(t0, t2); \

  112.     s1 = vec_sub(t1, t3); \

  113.     s2 = vec_add(t1, t3); \

  114.     s3 = vec_sub(t0, t2); \

  115. }while (0)

  116. 

  117. #define SHIFT_HOR4(s0, s1, s2, s3) \

  118.     s0 = vec_sra(s0, vec_3); \

  119.     s1 = vec_sra(s1, vec_3); \

  120.     s2 = vec_sra(s2, vec_3); \

  121.     s3 = vec_sra(s3, vec_3);

  122. 

  123. #define SHIFT_VERT4(s0, s1, s2, s3) \

  124.     s0 = vec_sra(s0, vec_7); \

  125.     s1 = vec_sra(s1, vec_7); \

  126.     s2 = vec_sra(s2, vec_7); \

  127.     s3 = vec_sra(s3, vec_7);

  128. 

  129. /** Do inverse transform on 8x8 block

  130. */

  131. static void vc1_inv_trans_8x8_altivec(DCTELEM block[64])

  132. {

  133.     vector signed short src0, src1, src2, src3, src4, src5, src6, src7;

  134.     vector signed int s0, s1, s2, s3, s4, s5, s6, s7;

  135.     vector signed int s8, s9, sA, sB, sC, sD, sE, sF;

  136.     vector signed int t0, t1, t2, t3, t4, t5, t6, t7;

  137.     const vector signed int vec_64 = vec_sl(vec_splat_s32(4), vec_splat_u32(4));

  138.     const vector unsigned int vec_7 = vec_splat_u32(7);

  139.     const vector unsigned int vec_4 = vec_splat_u32(4);

  140.     const vector  signed int vec_4s = vec_splat_s32(4);

  141.     const vector unsigned int vec_3 = vec_splat_u32(3);

  142.     const vector unsigned int vec_2 = vec_splat_u32(2);

  143.     const vector  signed int vec_1s = vec_splat_s32(1);

  144.     const vector unsigned int vec_1 = vec_splat_u32(1);

  145. 

  146. 

  147.     src0 = vec_ld(  0, block);

  148.     src1 = vec_ld( 16, block);

  149.     src2 = vec_ld( 32, block);

  150.     src3 = vec_ld( 48, block);

  151.     src4 = vec_ld( 64, block);

  152.     src5 = vec_ld( 80, block);

  153.     src6 = vec_ld( 96, block);

  154.     src7 = vec_ld(112, block);

  155. 

  156.     TRANSPOSE8(src0, src1, src2, src3, src4, src5, src6, src7);

  157.     s0 = vec_unpackl(src0);

  158.     s1 = vec_unpackl(src1);

  159.     s2 = vec_unpackl(src2);

  160.     s3 = vec_unpackl(src3);

  161.     s4 = vec_unpackl(src4);

  162.     s5 = vec_unpackl(src5);

  163.     s6 = vec_unpackl(src6);

  164.     s7 = vec_unpackl(src7);

  165.     s8 = vec_unpackh(src0);

  166.     s9 = vec_unpackh(src1);

  167.     sA = vec_unpackh(src2);

  168.     sB = vec_unpackh(src3);

  169.     sC = vec_unpackh(src4);

  170.     sD = vec_unpackh(src5);

  171.     sE = vec_unpackh(src6);

  172.     sF = vec_unpackh(src7);

  173.     STEP8(s0, s1, s2, s3, s4, s5, s6, s7, vec_4s);

  174.     SHIFT_HOR8(s0, s1, s2, s3, s4, s5, s6, s7);

  175.     STEP8(s8, s9, sA, sB, sC, sD, sE, sF, vec_4s);

  176.     SHIFT_HOR8(s8, s9, sA, sB, sC, sD, sE, sF);

  177.     src0 = vec_pack(s8, s0);

  178.     src1 = vec_pack(s9, s1);

  179.     src2 = vec_pack(sA, s2);

  180.     src3 = vec_pack(sB, s3);

  181.     src4 = vec_pack(sC, s4);

  182.     src5 = vec_pack(sD, s5);

  183.     src6 = vec_pack(sE, s6);

  184.     src7 = vec_pack(sF, s7);

  185.     TRANSPOSE8(src0, src1, src2, src3, src4, src5, src6, src7);

  186. 

  187.     s0 = vec_unpackl(src0);

  188.     s1 = vec_unpackl(src1);

  189.     s2 = vec_unpackl(src2);

  190.     s3 = vec_unpackl(src3);

  191.     s4 = vec_unpackl(src4);

  192.     s5 = vec_unpackl(src5);

  193.     s6 = vec_unpackl(src6);

  194.     s7 = vec_unpackl(src7);

  195.     s8 = vec_unpackh(src0);

  196.     s9 = vec_unpackh(src1);

  197.     sA = vec_unpackh(src2);

  198.     sB = vec_unpackh(src3);

  199.     sC = vec_unpackh(src4);

  200.     sD = vec_unpackh(src5);

  201.     sE = vec_unpackh(src6);

  202.     sF = vec_unpackh(src7);

  203.     STEP8(s0, s1, s2, s3, s4, s5, s6, s7, vec_64);

  204.     SHIFT_VERT8(s0, s1, s2, s3, s4, s5, s6, s7);

  205.     STEP8(s8, s9, sA, sB, sC, sD, sE, sF, vec_64);

  206.     SHIFT_VERT8(s8, s9, sA, sB, sC, sD, sE, sF);

  207.     src0 = vec_pack(s8, s0);

  208.     src1 = vec_pack(s9, s1);

  209.     src2 = vec_pack(sA, s2);

  210.     src3 = vec_pack(sB, s3);

  211.     src4 = vec_pack(sC, s4);

  212.     src5 = vec_pack(sD, s5);

  213.     src6 = vec_pack(sE, s6);

  214.     src7 = vec_pack(sF, s7);

  215. 

  216.     vec_st(src0,  0, block);

  217.     vec_st(src1, 16, block);

  218.     vec_st(src2, 32, block);

  219.     vec_st(src3, 48, block);

  220.     vec_st(src4, 64, block);

  221.     vec_st(src5, 80, block);

  222.     vec_st(src6, 96, block);

  223.     vec_st(src7,112, block);

  224. }

  225. 

  226. /** Do inverse transform on 8x4 part of block

  227. */

  228. static void vc1_inv_trans_8x4_altivec(uint8_t *dest, int stride, DCTELEM *block)

  229. {

  230.     vector signed short src0, src1, src2, src3, src4, src5, src6, src7;

  231.     vector signed int s0, s1, s2, s3, s4, s5, s6, s7;

  232.     vector signed int s8, s9, sA, sB, sC, sD, sE, sF;

  233.     vector signed int t0, t1, t2, t3, t4, t5, t6, t7;

  234.     const vector signed int vec_64 = vec_sl(vec_splat_s32(4), vec_splat_u32(4));

  235.     const vector unsigned int vec_7 = vec_splat_u32(7);

  236.     const vector unsigned int vec_5 = vec_splat_u32(5);

  237.     const vector unsigned int vec_4 = vec_splat_u32(4);

  238.     const vector  signed int vec_4s = vec_splat_s32(4);

  239.     const vector unsigned int vec_3 = vec_splat_u32(3);

  240.     const vector unsigned int vec_2 = vec_splat_u32(2);

  241.     const vector unsigned int vec_1 = vec_splat_u32(1);

  242.     vector unsigned char tmp;

  243.     vector signed short tmp2, tmp3;

  244.     vector unsigned char perm0, perm1, p0, p1, p;

  245. 

  246.     src0 = vec_ld(  0, block);

  247.     src1 = vec_ld( 16, block);

  248.     src2 = vec_ld( 32, block);

  249.     src3 = vec_ld( 48, block);

  250.     src4 = vec_ld( 64, block);

  251.     src5 = vec_ld( 80, block);

  252.     src6 = vec_ld( 96, block);

  253.     src7 = vec_ld(112, block);

  254. 

  255.     TRANSPOSE8(src0, src1, src2, src3, src4, src5, src6, src7);

  256.     s0 = vec_unpackl(src0);

  257.     s1 = vec_unpackl(src1);

  258.     s2 = vec_unpackl(src2);

  259.     s3 = vec_unpackl(src3);

  260.     s4 = vec_unpackl(src4);

  261.     s5 = vec_unpackl(src5);

  262.     s6 = vec_unpackl(src6);

  263.     s7 = vec_unpackl(src7);

  264.     s8 = vec_unpackh(src0);

  265.     s9 = vec_unpackh(src1);

  266.     sA = vec_unpackh(src2);

  267.     sB = vec_unpackh(src3);

  268.     sC = vec_unpackh(src4);

  269.     sD = vec_unpackh(src5);

  270.     sE = vec_unpackh(src6);

  271.     sF = vec_unpackh(src7);

  272.     STEP8(s0, s1, s2, s3, s4, s5, s6, s7, vec_4s);

  273.     SHIFT_HOR8(s0, s1, s2, s3, s4, s5, s6, s7);

  274.     STEP8(s8, s9, sA, sB, sC, sD, sE, sF, vec_4s);

  275.     SHIFT_HOR8(s8, s9, sA, sB, sC, sD, sE, sF);

  276.     src0 = vec_pack(s8, s0);

  277.     src1 = vec_pack(s9, s1);

  278.     src2 = vec_pack(sA, s2);

  279.     src3 = vec_pack(sB, s3);

  280.     src4 = vec_pack(sC, s4);

  281.     src5 = vec_pack(sD, s5);

  282.     src6 = vec_pack(sE, s6);

  283.     src7 = vec_pack(sF, s7);

  284.     TRANSPOSE8(src0, src1, src2, src3, src4, src5, src6, src7);

  285. 

  286.     s0 = vec_unpackh(src0);

  287.     s1 = vec_unpackh(src1);

  288.     s2 = vec_unpackh(src2);

  289.     s3 = vec_unpackh(src3);

  290.     s8 = vec_unpackl(src0);

  291.     s9 = vec_unpackl(src1);

  292.     sA = vec_unpackl(src2);

  293.     sB = vec_unpackl(src3);

  294.     STEP4(s0, s1, s2, s3, vec_64);

  295.     SHIFT_VERT4(s0, s1, s2, s3);

  296.     STEP4(s8, s9, sA, sB, vec_64);

  297.     SHIFT_VERT4(s8, s9, sA, sB);

  298.     src0 = vec_pack(s0, s8);

  299.     src1 = vec_pack(s1, s9);

  300.     src2 = vec_pack(s2, sA);

  301.     src3 = vec_pack(s3, sB);

  302. 

  303.     p0 = vec_lvsl (0, dest);

  304.     p1 = vec_lvsl (stride, dest);

  305.     p = vec_splat_u8 (-1);

  306.     perm0 = vec_mergeh (p, p0);

  307.     perm1 = vec_mergeh (p, p1);

  308. 

  309. #define ADD(dest,src,perm)                                              \

  310.     /* *(uint64_t *)&tmp = *(uint64_t *)dest; */                        \

  311.     tmp = vec_ld (0, dest);                                             \

  312.     tmp2 = (vector signed short)vec_perm (tmp, vec_splat_u8(0), perm);  \

  313.     tmp3 = vec_adds (tmp2, src);                                        \

  314.     tmp = vec_packsu (tmp3, tmp3);                                      \

  315.     vec_ste ((vector unsigned int)tmp, 0, (unsigned int *)dest);        \

  316.     vec_ste ((vector unsigned int)tmp, 4, (unsigned int *)dest);

  317. 

  318.     ADD (dest, src0, perm0)      dest += stride;

  319.     ADD (dest, src1, perm1)      dest += stride;

  320.     ADD (dest, src2, perm0)      dest += stride;

  321.     ADD (dest, src3, perm1)

  322. }

  323. 

  324. 

  325. void vc1dsp_init_altivec(DSPContext* dsp, AVCodecContext *avctx) {

  326.     dsp->vc1_inv_trans_8x8 = vc1_inv_trans_8x8_altivec;

  327.     dsp->vc1_inv_trans_8x4 = vc1_inv_trans_8x4_altivec;

  328. }