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  1. /*
  2.  * ARM NEON optimised DSP functions for G722 coding
  3.  * Copyright (c) 2015 Peter Meerwald <pmeerw@pmeerw.net>
  4.  *
  5.  * This file is part of FFmpeg.
  6.  *
  7.  * FFmpeg is free software; you can redistribute it and/or
  8.  * modify it under the terms of the GNU Lesser General Public
  9.  * License as published by the Free Software Foundation; either
  10.  * version 2.1 of the License, or (at your option) any later version.
  11.  *
  12.  * FFmpeg is distributed in the hope that it will be useful,
  13.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15.  * Lesser General Public License for more details.
  16.  *
  17.  * You should have received a copy of the GNU Lesser General Public
  18.  * License along with FFmpeg; if not, write to the Free Software
  19.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20.  */
  21.  
  22. #include "libavutil/arm/asm.S"
  23.  
  24. function ff_g722_apply_qmf_neon, export=1, align=4
  25.         movrel          r3, qmf_coeffs
  26.         vld1.s16        {d2,d3,d4}, [r0]! /* load prev_samples */
  27.         vld1.s16        {d16,d17,d18}, [r3,:64]! /* load qmf_coeffs */
  28.         vmull.s16       q0, d2, d16
  29.         vmlal.s16       q0, d3, d17
  30.         vmlal.s16       q0, d4, d18
  31.  
  32.         vld1.s16        {d5,d6,d7}, [r0]! /* load prev_samples */
  33.         vld1.s16        {d19,d20,d21}, [r3,:64]! /* load qmf_coeffs */
  34.         vmlal.s16       q0, d5, d19
  35.         vmlal.s16       q0, d6, d20
  36.         vmlal.s16       q0, d7, d21
  37.  
  38.         vadd.s32        d0, d1, d0
  39.         vrev64.32       d0, d0
  40.         vst1.s32        {d0}, [r1]
  41.         bx              lr
  42. endfunc
  43.  
  44. const qmf_coeffs, align=4
  45.         .hword          3
  46.         .hword          -11
  47.         .hword          -11
  48.         .hword          53
  49.         .hword          12
  50.         .hword          -156
  51.         .hword          32
  52.         .hword          362
  53.         .hword          -210
  54.         .hword          -805
  55.         .hword          951
  56.         .hword          3876
  57.         .hword          3876
  58.         .hword          951
  59.         .hword          -805
  60.         .hword          -210
  61.         .hword          362
  62.         .hword          32
  63.         .hword          -156
  64.         .hword          12
  65.         .hword          53
  66.         .hword          -11
  67.         .hword          -11
  68.         .hword          3
  69. endconst
  70.