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64 lines
2.2 KiB
C
64 lines
2.2 KiB
C
/*
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* Copyright (c) 2006 Luca Barbato <lu_zero@gentoo.org>
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "config.h"
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#include "libavutil/attributes.h"
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#include "libavutil/cpu.h"
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#include "libavutil/ppc/cpu.h"
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#include "libavutil/ppc/util_altivec.h"
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#include "libavcodec/vorbisdsp.h"
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#if HAVE_ALTIVEC && HAVE_BIGENDIAN
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static void vorbis_inverse_coupling_altivec(float *mag, float *ang,
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intptr_t blocksize)
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{
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int i;
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vector float m, a;
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vector bool int t0, t1;
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const vector unsigned int v_31 = //XXX
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vec_add(vec_add(vec_splat_u32(15),vec_splat_u32(15)),vec_splat_u32(1));
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for (i = 0; i < blocksize; i += 4) {
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m = vec_ld(0, mag+i);
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a = vec_ld(0, ang+i);
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t0 = vec_cmple(m, (vector float)vec_splat_u32(0));
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t1 = vec_cmple(a, (vector float)vec_splat_u32(0));
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a = vec_xor(a, (vector float) vec_sl((vector unsigned int)t0, v_31));
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t0 = (vector bool int)vec_and(a, t1);
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t1 = (vector bool int)vec_andc(a, t1);
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a = vec_sub(m, (vector float)t1);
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m = vec_add(m, (vector float)t0);
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vec_stl(a, 0, ang+i);
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vec_stl(m, 0, mag+i);
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}
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}
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#endif /* HAVE_ALTIVEC && HAVE_BIGENDIAN */
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av_cold void ff_vorbisdsp_init_ppc(VorbisDSPContext *c)
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{
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#if HAVE_ALTIVEC && HAVE_BIGENDIAN
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if (!PPC_ALTIVEC(av_get_cpu_flags()))
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return;
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c->vorbis_inverse_coupling = vorbis_inverse_coupling_altivec;
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#endif /* HAVE_ALTIVEC && HAVE_BIGENDIAN */
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}
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