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FFmpeg/libavcodec/arm/g722dsp_neon.S

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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 Libav.

  6.  *

  7.  * Libav 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.  * Libav 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 Libav; 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