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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 | } |