/*
  * Copyright (c) 2007-2008 Ian Caulfield
  *               2009 Ramiro Polla
  *
  * 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 "config.h"

 #include "libavutil/attributes.h"

 #include "mlpdsp.h"

 #include "mlp.h"

 static void mlp_filter_channel(int32_t *state, const int32_t *coeff,
                                int firorder, int iirorder,
                                unsigned int filter_shift, int32_t mask,
                                int blocksize, int32_t *sample_buffer)

 {

     int32_t *firbuf = state;
     int32_t *iirbuf = state + MAX_BLOCKSIZE + MAX_FIR_ORDER;
     const int32_t *fircoeff = coeff;
     const int32_t *iircoeff = coeff + MAX_FIR_ORDER;

     int i;
 
     for (i = 0; i < blocksize; i++) {
         int32_t residual = *sample_buffer;
         unsigned int order;
         int64_t accum = 0;
         int32_t result;
 
         for (order = 0; order < firorder; order++)
             accum += (int64_t) firbuf[order] * fircoeff[order];
         for (order = 0; order < iirorder; order++)
             accum += (int64_t) iirbuf[order] * iircoeff[order];
 
         accum  = accum >> filter_shift;
         result = (accum + residual) & mask;
 
         *--firbuf = result;
         *--iirbuf = result - accum;
 
         *sample_buffer = result;

         sample_buffer += MAX_CHANNELS;

     }
 }
 

 av_cold void ff_mlpdsp_init(MLPDSPContext *c)

 {

     c->mlp_filter_channel = mlp_filter_channel;

     if (ARCH_X86)

         ff_mlpdsp_init_x86(c);

 }