/*
  * DCA ADPCM engine
  * Copyright (C) 2017 Daniil Cherednik
  *
  * 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
  */
 
 #ifndef AVCODEC_DCAADPCM_H
 #define AVCODEC_DCAADPCM_H
 
 #include "dcamath.h"
 #include "dcadata.h"
 #include "dcaenc.h"
 
 typedef struct DCAADPCMEncContext {
     void *private_data;
 } DCAADPCMEncContext;
 
 static inline int64_t ff_dcaadpcm_predict(int pred_vq_index, const int32_t *input)
 {
     int i;
     const int16_t *coeff = ff_dca_adpcm_vb[pred_vq_index];
     int64_t pred = 0;
     for (i = 0; i < DCA_ADPCM_COEFFS; i++)
         pred += (int64_t)input[DCA_ADPCM_COEFFS - 1 - i] * coeff[i];
 
     return clip23(norm13(pred));
 }
 
 int ff_dcaadpcm_subband_analysis(const DCAADPCMEncContext *s, const int32_t *input, int len, int *diff);
 
 int ff_dcaadpcm_do_real(int pred_vq_index,
                         softfloat quant, int32_t scale_factor, int32_t step_size,
                         const int32_t *prev_hist, const int32_t *in, int32_t *next_hist, int32_t *out,
                         int len, int32_t peak);
 
 av_cold int ff_dcaadpcm_init(DCAADPCMEncContext *s);
 av_cold void ff_dcaadpcm_free(DCAADPCMEncContext *s);
 
 #endif /* AVCODEC_DCAADPCM_H */