| /* |
| * Copyright (c) 2006 Luca Barbato <lu_zero@gentoo.org> |
| * |
| * 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 |
| */ |
| |
| #include "config.h" |
| #if HAVE_ALTIVEC_H |
| #include <altivec.h> |
| #endif |
| #include "libavutil/attributes.h" |
| #include "libavutil/cpu.h" |
| #include "libavutil/ppc/cpu.h" |
| #include "libavcodec/vorbisdsp.h" |
| |
| #if HAVE_ALTIVEC |
| static void vorbis_inverse_coupling_altivec(float *mag, float *ang, |
| intptr_t blocksize) |
| { |
| int i; |
| vector float m, a; |
| vector bool int t0, t1; |
| const vector unsigned int v_31 = //XXX |
| vec_add(vec_add(vec_splat_u32(15),vec_splat_u32(15)),vec_splat_u32(1)); |
| for (i = 0; i < blocksize; i += 4) { |
| m = vec_ld(0, mag+i); |
| a = vec_ld(0, ang+i); |
| t0 = vec_cmple(m, (vector float)vec_splat_u32(0)); |
| t1 = vec_cmple(a, (vector float)vec_splat_u32(0)); |
| a = vec_xor(a, (vector float) vec_sl((vector unsigned int)t0, v_31)); |
| t0 = (vector bool int)vec_and(a, t1); |
| t1 = (vector bool int)vec_andc(a, t1); |
| a = vec_sub(m, (vector float)t1); |
| m = vec_add(m, (vector float)t0); |
| vec_stl(a, 0, ang+i); |
| vec_stl(m, 0, mag+i); |
| } |
| } |
| #endif /* HAVE_ALTIVEC */ |
| |
| av_cold void ff_vorbisdsp_init_ppc(VorbisDSPContext *c) |
| { |
| #if HAVE_ALTIVEC |
| if (!PPC_ALTIVEC(av_get_cpu_flags())) |
| return; |
| |
| c->vorbis_inverse_coupling = vorbis_inverse_coupling_altivec; |
| #endif /* HAVE_ALTIVEC */ |
| } |