d7557c815b8224885de6e19d81d8d76dff498bdc
[deb_ffmpeg.git] / vorbisdsp_altivec.c
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
31 static 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
55 av_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 }