1/* 2 * Copyright (c) 2006 Luca Barbato <lu_zero@gentoo.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#if HAVE_ALTIVEC_H 23#include <altivec.h> 24#endif 25#include "libavutil/attributes.h" 26#include "libavutil/cpu.h" 27#include "libavutil/ppc/cpu.h" 28#include "libavcodec/vorbisdsp.h" 29 30#if HAVE_ALTIVEC 31static void vorbis_inverse_coupling_altivec(float *mag, float *ang, 32 intptr_t blocksize) 33{ 34 int i; 35 vector float m, a; 36 vector bool int t0, t1; 37 const vector unsigned int v_31 = //XXX 38 vec_add(vec_add(vec_splat_u32(15),vec_splat_u32(15)),vec_splat_u32(1)); 39 for (i = 0; i < blocksize; i += 4) { 40 m = vec_ld(0, mag+i); 41 a = vec_ld(0, ang+i); 42 t0 = vec_cmple(m, (vector float)vec_splat_u32(0)); 43 t1 = vec_cmple(a, (vector float)vec_splat_u32(0)); 44 a = vec_xor(a, (vector float) vec_sl((vector unsigned int)t0, v_31)); 45 t0 = (vector bool int)vec_and(a, t1); 46 t1 = (vector bool int)vec_andc(a, t1); 47 a = vec_sub(m, (vector float)t1); 48 m = vec_add(m, (vector float)t0); 49 vec_stl(a, 0, ang+i); 50 vec_stl(m, 0, mag+i); 51 } 52} 53#endif /* HAVE_ALTIVEC */ 54 55av_cold void ff_vorbisdsp_init_ppc(VorbisDSPContext *c) 56{ 57#if HAVE_ALTIVEC 58 if (!PPC_ALTIVEC(av_get_cpu_flags())) 59 return; 60 61 c->vorbis_inverse_coupling = vorbis_inverse_coupling_altivec; 62#endif /* HAVE_ALTIVEC */ 63} 64