/*
  * Copyright (c) 2015 Peter Meerwald <pmeerw@pmeerw.net>
  *

  * This file is part of FFmpeg.

  *

  * FFmpeg is free software; you can redistribute it and/or

  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *

  * FFmpeg is distributed in the hope that it will be useful,

  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public

  * License along with FFmpeg; if not, write to the Free Software

  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 #include "g722dsp.h"
 #include "mathops.h"
 
 /*
  * quadrature mirror filter (QMF) coefficients (ITU-T G.722 Table 11) inlined
  * in code below: 3, -11, 12, 32, -210, 951, 3876, -805, 362, -156, 53, -11
  */
 

 static void g722_apply_qmf(const int16_t *prev_samples, int xout[2])

 {

     xout[1] = MUL16(*prev_samples++, 3);
     xout[0] = MUL16(*prev_samples++, -11);
 
     MAC16(xout[1], *prev_samples++, -11);
     MAC16(xout[0], *prev_samples++, 53);
 
     MAC16(xout[1], *prev_samples++, 12);
     MAC16(xout[0], *prev_samples++, -156);
 
     MAC16(xout[1], *prev_samples++, 32);
     MAC16(xout[0], *prev_samples++, 362);
 
     MAC16(xout[1], *prev_samples++, -210);
     MAC16(xout[0], *prev_samples++, -805);
 
     MAC16(xout[1], *prev_samples++, 951);
     MAC16(xout[0], *prev_samples++, 3876);
 
     MAC16(xout[1], *prev_samples++, 3876);
     MAC16(xout[0], *prev_samples++, 951);
 
     MAC16(xout[1], *prev_samples++, -805);
     MAC16(xout[0], *prev_samples++, -210);
 
     MAC16(xout[1], *prev_samples++, 362);
     MAC16(xout[0], *prev_samples++, 32);
 
     MAC16(xout[1], *prev_samples++, -156);
     MAC16(xout[0], *prev_samples++, 12);
 
     MAC16(xout[1], *prev_samples++, 53);
     MAC16(xout[0], *prev_samples++, -11);
 
     MAC16(xout[1], *prev_samples++, -11);
     MAC16(xout[0], *prev_samples++, 3);

 }
 
 av_cold void ff_g722dsp_init(G722DSPContext *c)
 {
     c->apply_qmf = g722_apply_qmf;

 
     if (ARCH_ARM)
         ff_g722dsp_init_arm(c);

     if (ARCH_X86)
         ff_g722dsp_init_x86(c);

 }