63 lines
2.1 KiB
C
63 lines
2.1 KiB
C
|
/*
|
||
|
|
* 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 "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 (!(av_get_cpu_flags() & AV_CPU_FLAG_ALTIVEC))
|
||
|
|
return;
|
||
|
|
|
||
|
|
c->vorbis_inverse_coupling = vorbis_inverse_coupling_altivec;
|
||
|
|
#endif /* HAVE_ALTIVEC */
|
||
|
|
}
|