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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 6148 | serge | 1 | /* |
| 2 | * Copyright (c) 2006 Luca Barbato |
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| 3 | * |
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| 4 | * This file is part of FFmpeg. |
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| 5 | * |
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| 6 | * FFmpeg is free software; you can redistribute it and/or |
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| 7 | * modify it under the terms of the GNU Lesser General Public |
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| 8 | * License as published by the Free Software Foundation; either |
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| 9 | * version 2.1 of the License, or (at your option) any later version. |
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| 10 | * |
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| 11 | * FFmpeg is distributed in the hope that it will be useful, |
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| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 14 | * Lesser General Public License for more details. |
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| 15 | * |
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| 16 | * You should have received a copy of the GNU Lesser General Public |
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| 17 | * License along with FFmpeg; if not, write to the Free Software |
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| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 19 | */ |
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| 20 | |||
| 21 | #include "config.h" |
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| 22 | #if HAVE_ALTIVEC_H |
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| 23 | #include |
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| 24 | #endif |
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| 25 | #include "libavutil/attributes.h" |
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| 26 | #include "libavutil/cpu.h" |
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| 27 | #include "libavcodec/vorbisdsp.h" |
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| 28 | |||
| 29 | #if HAVE_ALTIVEC |
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| 30 | static void vorbis_inverse_coupling_altivec(float *mag, float *ang, |
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| 31 | intptr_t blocksize) |
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| 32 | { |
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| 33 | int i; |
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| 34 | vector float m, a; |
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| 35 | vector bool int t0, t1; |
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| 36 | const vector unsigned int v_31 = //XXX |
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| 37 | vec_add(vec_add(vec_splat_u32(15),vec_splat_u32(15)),vec_splat_u32(1)); |
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| 38 | for (i = 0; i < blocksize; i += 4) { |
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| 39 | m = vec_ld(0, mag+i); |
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| 40 | a = vec_ld(0, ang+i); |
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| 41 | t0 = vec_cmple(m, (vector float)vec_splat_u32(0)); |
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| 42 | t1 = vec_cmple(a, (vector float)vec_splat_u32(0)); |
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| 43 | a = vec_xor(a, (vector float) vec_sl((vector unsigned int)t0, v_31)); |
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| 44 | t0 = (vector bool int)vec_and(a, t1); |
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| 45 | t1 = (vector bool int)vec_andc(a, t1); |
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| 46 | a = vec_sub(m, (vector float)t1); |
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| 47 | m = vec_add(m, (vector float)t0); |
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| 48 | vec_stl(a, 0, ang+i); |
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| 49 | vec_stl(m, 0, mag+i); |
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| 50 | } |
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| 51 | } |
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| 52 | #endif /* HAVE_ALTIVEC */ |
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| 53 | |||
| 54 | av_cold void ff_vorbisdsp_init_ppc(VorbisDSPContext *c) |
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| 55 | { |
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| 56 | #if HAVE_ALTIVEC |
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| 57 | if (!(av_get_cpu_flags() & AV_CPU_FLAG_ALTIVEC)) |
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| 58 | return; |
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| 59 | |||
| 60 | c->vorbis_inverse_coupling = vorbis_inverse_coupling_altivec; |
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| 61 | #endif /* HAVE_ALTIVEC */ |
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| 62 | } |