| /* |
| * Copyright (c) 2001 Michel Lespinasse |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /* |
| * NOTE: This code is based on GPL code from the libmpeg2 project. The |
| * author, Michel Lespinasses, has given explicit permission to release |
| * under LGPL as part of ffmpeg. |
| */ |
| |
| /* |
| * FFMpeg integration by Dieter Shirley |
| * |
| * This file is a direct copy of the altivec idct module from the libmpeg2 |
| * project. I've deleted all of the libmpeg2 specific code, renamed the functions and |
| * re-ordered the function parameters. The only change to the IDCT function |
| * itself was to factor out the partial transposition, and to perform a full |
| * transpose at the end of the function. |
| */ |
| |
| |
| #include <stdlib.h> /* malloc(), free() */ |
| #include <string.h> |
| #include "libavcodec/dsputil.h" |
| |
| #include "gcc_fixes.h" |
| #include "types_altivec.h" |
| #include "dsputil_ppc.h" |
| |
| #define IDCT_HALF \ |
| /* 1st stage */ \ |
| t1 = vec_mradds (a1, vx7, vx1 ); \ |
| t8 = vec_mradds (a1, vx1, vec_subs (zero, vx7)); \ |
| t7 = vec_mradds (a2, vx5, vx3); \ |
| t3 = vec_mradds (ma2, vx3, vx5); \ |
| \ |
| /* 2nd stage */ \ |
| t5 = vec_adds (vx0, vx4); \ |
| t0 = vec_subs (vx0, vx4); \ |
| t2 = vec_mradds (a0, vx6, vx2); \ |
| t4 = vec_mradds (a0, vx2, vec_subs (zero, vx6)); \ |
| t6 = vec_adds (t8, t3); \ |
| t3 = vec_subs (t8, t3); \ |
| t8 = vec_subs (t1, t7); \ |
| t1 = vec_adds (t1, t7); \ |
| \ |
| /* 3rd stage */ \ |
| t7 = vec_adds (t5, t2); \ |
| t2 = vec_subs (t5, t2); \ |
| t5 = vec_adds (t0, t4); \ |
| t0 = vec_subs (t0, t4); \ |
| t4 = vec_subs (t8, t3); \ |
| t3 = vec_adds (t8, t3); \ |
| \ |
| /* 4th stage */ \ |
| vy0 = vec_adds (t7, t1); \ |
| vy7 = vec_subs (t7, t1); \ |
| vy1 = vec_mradds (c4, t3, t5); \ |
| vy6 = vec_mradds (mc4, t3, t5); \ |
| vy2 = vec_mradds (c4, t4, t0); \ |
| vy5 = vec_mradds (mc4, t4, t0); \ |
| vy3 = vec_adds (t2, t6); \ |
| vy4 = vec_subs (t2, t6); |
| |
| |
| #define IDCT \ |
| vec_s16 vx0, vx1, vx2, vx3, vx4, vx5, vx6, vx7; \ |
| vec_s16 vy0, vy1, vy2, vy3, vy4, vy5, vy6, vy7; \ |
| vec_s16 a0, a1, a2, ma2, c4, mc4, zero, bias; \ |
| vec_s16 t0, t1, t2, t3, t4, t5, t6, t7, t8; \ |
| vec_u16 shift; \ |
| \ |
| c4 = vec_splat (constants[0], 0); \ |
| a0 = vec_splat (constants[0], 1); \ |
| a1 = vec_splat (constants[0], 2); \ |
| a2 = vec_splat (constants[0], 3); \ |
| mc4 = vec_splat (constants[0], 4); \ |
| ma2 = vec_splat (constants[0], 5); \ |
| bias = (vec_s16)vec_splat ((vec_s32)constants[0], 3); \ |
| \ |
| zero = vec_splat_s16 (0); \ |
| shift = vec_splat_u16 (4); \ |
| \ |
| vx0 = vec_mradds (vec_sl (block[0], shift), constants[1], zero); \ |
| vx1 = vec_mradds (vec_sl (block[1], shift), constants[2], zero); \ |
| vx2 = vec_mradds (vec_sl (block[2], shift), constants[3], zero); \ |
| vx3 = vec_mradds (vec_sl (block[3], shift), constants[4], zero); \ |
| vx4 = vec_mradds (vec_sl (block[4], shift), constants[1], zero); \ |
| vx5 = vec_mradds (vec_sl (block[5], shift), constants[4], zero); \ |
| vx6 = vec_mradds (vec_sl (block[6], shift), constants[3], zero); \ |
| vx7 = vec_mradds (vec_sl (block[7], shift), constants[2], zero); \ |
| \ |
| IDCT_HALF \ |
| \ |
| vx0 = vec_mergeh (vy0, vy4); \ |
| vx1 = vec_mergel (vy0, vy4); \ |
| vx2 = vec_mergeh (vy1, vy5); \ |
| vx3 = vec_mergel (vy1, vy5); \ |
| vx4 = vec_mergeh (vy2, vy6); \ |
| vx5 = vec_mergel (vy2, vy6); \ |
| vx6 = vec_mergeh (vy3, vy7); \ |
| vx7 = vec_mergel (vy3, vy7); \ |
| \ |
| vy0 = vec_mergeh (vx0, vx4); \ |
| vy1 = vec_mergel (vx0, vx4); \ |
| vy2 = vec_mergeh (vx1, vx5); \ |
| vy3 = vec_mergel (vx1, vx5); \ |
| vy4 = vec_mergeh (vx2, vx6); \ |
| vy5 = vec_mergel (vx2, vx6); \ |
| vy6 = vec_mergeh (vx3, vx7); \ |
| vy7 = vec_mergel (vx3, vx7); \ |
| \ |
| vx0 = vec_adds (vec_mergeh (vy0, vy4), bias); \ |
| vx1 = vec_mergel (vy0, vy4); \ |
| vx2 = vec_mergeh (vy1, vy5); \ |
| vx3 = vec_mergel (vy1, vy5); \ |
| vx4 = vec_mergeh (vy2, vy6); \ |
| vx5 = vec_mergel (vy2, vy6); \ |
| vx6 = vec_mergeh (vy3, vy7); \ |
| vx7 = vec_mergel (vy3, vy7); \ |
| \ |
| IDCT_HALF \ |
| \ |
| shift = vec_splat_u16 (6); \ |
| vx0 = vec_sra (vy0, shift); \ |
| vx1 = vec_sra (vy1, shift); \ |
| vx2 = vec_sra (vy2, shift); \ |
| vx3 = vec_sra (vy3, shift); \ |
| vx4 = vec_sra (vy4, shift); \ |
| vx5 = vec_sra (vy5, shift); \ |
| vx6 = vec_sra (vy6, shift); \ |
| vx7 = vec_sra (vy7, shift); |
| |
| |
| static const vec_s16 constants[5] = { |
| {23170, 13573, 6518, 21895, -23170, -21895, 32, 31}, |
| {16384, 22725, 21407, 19266, 16384, 19266, 21407, 22725}, |
| {22725, 31521, 29692, 26722, 22725, 26722, 29692, 31521}, |
| {21407, 29692, 27969, 25172, 21407, 25172, 27969, 29692}, |
| {19266, 26722, 25172, 22654, 19266, 22654, 25172, 26722} |
| }; |
| |
| void idct_put_altivec(uint8_t* dest, int stride, vec_s16* block) |
| { |
| POWERPC_PERF_DECLARE(altivec_idct_put_num, 1); |
| vec_u8 tmp; |
| |
| #if CONFIG_POWERPC_PERF |
| POWERPC_PERF_START_COUNT(altivec_idct_put_num, 1); |
| #endif |
| IDCT |
| |
| #define COPY(dest,src) \ |
| tmp = vec_packsu (src, src); \ |
| vec_ste ((vec_u32)tmp, 0, (unsigned int *)dest); \ |
| vec_ste ((vec_u32)tmp, 4, (unsigned int *)dest); |
| |
| COPY (dest, vx0) dest += stride; |
| COPY (dest, vx1) dest += stride; |
| COPY (dest, vx2) dest += stride; |
| COPY (dest, vx3) dest += stride; |
| COPY (dest, vx4) dest += stride; |
| COPY (dest, vx5) dest += stride; |
| COPY (dest, vx6) dest += stride; |
| COPY (dest, vx7) |
| |
| POWERPC_PERF_STOP_COUNT(altivec_idct_put_num, 1); |
| } |
| |
| void idct_add_altivec(uint8_t* dest, int stride, vec_s16* block) |
| { |
| POWERPC_PERF_DECLARE(altivec_idct_add_num, 1); |
| vec_u8 tmp; |
| vec_s16 tmp2, tmp3; |
| vec_u8 perm0; |
| vec_u8 perm1; |
| vec_u8 p0, p1, p; |
| |
| #if CONFIG_POWERPC_PERF |
| POWERPC_PERF_START_COUNT(altivec_idct_add_num, 1); |
| #endif |
| |
| IDCT |
| |
| p0 = vec_lvsl (0, dest); |
| p1 = vec_lvsl (stride, dest); |
| p = vec_splat_u8 (-1); |
| perm0 = vec_mergeh (p, p0); |
| perm1 = vec_mergeh (p, p1); |
| |
| #define ADD(dest,src,perm) \ |
| /* *(uint64_t *)&tmp = *(uint64_t *)dest; */ \ |
| tmp = vec_ld (0, dest); \ |
| tmp2 = (vec_s16)vec_perm (tmp, (vec_u8)zero, perm); \ |
| tmp3 = vec_adds (tmp2, src); \ |
| tmp = vec_packsu (tmp3, tmp3); \ |
| vec_ste ((vec_u32)tmp, 0, (unsigned int *)dest); \ |
| vec_ste ((vec_u32)tmp, 4, (unsigned int *)dest); |
| |
| ADD (dest, vx0, perm0) dest += stride; |
| ADD (dest, vx1, perm1) dest += stride; |
| ADD (dest, vx2, perm0) dest += stride; |
| ADD (dest, vx3, perm1) dest += stride; |
| ADD (dest, vx4, perm0) dest += stride; |
| ADD (dest, vx5, perm1) dest += stride; |
| ADD (dest, vx6, perm0) dest += stride; |
| ADD (dest, vx7, perm1) |
| |
| POWERPC_PERF_STOP_COUNT(altivec_idct_add_num, 1); |
| } |
| |
