/*
  * 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 "libavutil/attributes.h"

 #include "ttadsp.h"

 #include "config.h"

 static void tta_filter_process_c(int32_t *qm, int32_t *dx, int32_t *dl,
                                  int32_t *error, int32_t *in, int32_t shift,
                                  int32_t round) {

     if (*error < 0) {
         qm[0] -= dx[0]; qm[1] -= dx[1]; qm[2] -= dx[2]; qm[3] -= dx[3];
         qm[4] -= dx[4]; qm[5] -= dx[5]; qm[6] -= dx[6]; qm[7] -= dx[7];
     } else if (*error > 0) {
         qm[0] += dx[0]; qm[1] += dx[1]; qm[2] += dx[2]; qm[3] += dx[3];
         qm[4] += dx[4]; qm[5] += dx[5]; qm[6] += dx[6]; qm[7] += dx[7];
     }
 

     round += dl[0] * qm[0] + dl[1] * qm[1] + dl[2] * qm[2] + dl[3] * qm[3] +
              dl[4] * qm[4] + dl[5] * qm[5] + dl[6] * qm[6] + dl[7] * qm[7];

 
     dx[0] = dx[1]; dx[1] = dx[2]; dx[2] = dx[3]; dx[3] = dx[4];
     dl[0] = dl[1]; dl[1] = dl[2]; dl[2] = dl[3]; dl[3] = dl[4];
 
     dx[4] = ((dl[4] >> 30) | 1);
     dx[5] = ((dl[5] >> 30) | 2) & ~1;
     dx[6] = ((dl[6] >> 30) | 2) & ~1;
     dx[7] = ((dl[7] >> 30) | 4) & ~3;
 
     *error = *in;
     *in += (round >> shift);
 
     dl[4] = -dl[5]; dl[5] = -dl[6];
     dl[6] = *in - dl[7]; dl[7] = *in;
     dl[5] += dl[6]; dl[4] += dl[5];
 }
 
 av_cold void ff_ttadsp_init(TTADSPContext *c)
 {

     c->filter_process = tta_filter_process_c;

 
     if (ARCH_X86)
         ff_ttadsp_init_x86(c);

 }