mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
63 lines
2.1 KiB
63 lines
2.1 KiB
/* |
|
* 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 */ |
|
}
|
|
|