Subversion Repositories Kolibri OS

Rev

Blame | Last modification | View Log | RSS feed

  1. /*
  2.  * Copyright (c) 2007 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. /**
  22.  * @file
  23.  * miscellaneous audio operations
  24.  */
  25.  
  26. #include "config.h"
  27. #if HAVE_ALTIVEC_H
  28. #include <altivec.h>
  29. #endif
  30.  
  31. #include "libavutil/attributes.h"
  32. #include "libavutil/cpu.h"
  33. #include "libavutil/ppc/cpu.h"
  34. #include "libavutil/ppc/types_altivec.h"
  35. #include "libavutil/ppc/util_altivec.h"
  36. #include "libavcodec/audiodsp.h"
  37.  
  38. #if HAVE_ALTIVEC
  39.  
  40. static int32_t scalarproduct_int16_altivec(const int16_t *v1, const int16_t *v2,
  41.                                            int order)
  42. {
  43.     int i;
  44.     LOAD_ZERO;
  45.     register vec_s16 vec1;
  46.     register vec_s32 res = vec_splat_s32(0), t;
  47.     int32_t ires;
  48.  
  49.     for (i = 0; i < order; i += 8) {
  50.         vec1 = vec_unaligned_load(v1);
  51.         t    = vec_msum(vec1, vec_ld(0, v2), zero_s32v);
  52.         res  = vec_sums(t, res);
  53.         v1  += 8;
  54.         v2  += 8;
  55.     }
  56.     res = vec_splat(res, 3);
  57.     vec_ste(res, 0, &ires);
  58.  
  59.     return ires;
  60. }
  61.  
  62. #endif /* HAVE_ALTIVEC */
  63.  
  64. av_cold void ff_audiodsp_init_ppc(AudioDSPContext *c)
  65. {
  66. #if HAVE_ALTIVEC
  67.     if (!PPC_ALTIVEC(av_get_cpu_flags()))
  68.         return;
  69.  
  70.     c->scalarproduct_int16 = scalarproduct_int16_altivec;
  71. #endif /* HAVE_ALTIVEC */
  72. }
  73.