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55 lines
1.8 KiB
C
55 lines
1.8 KiB
C
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/*
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* DCA ADPCM engine
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* Copyright (C) 2017 Daniil Cherednik
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVCODEC_DCAADPCM_H
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#define AVCODEC_DCAADPCM_H
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#include "dcamath.h"
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#include "dcadata.h"
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#include "dcaenc.h"
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typedef struct DCAADPCMEncContext {
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void *private_data;
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} DCAADPCMEncContext;
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static inline int64_t ff_dcaadpcm_predict(int pred_vq_index, const int32_t *input)
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{
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int i;
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const int16_t *coeff = ff_dca_adpcm_vb[pred_vq_index];
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int64_t pred = 0;
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for (i = 0; i < DCA_ADPCM_COEFFS; i++)
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pred += (int64_t)input[DCA_ADPCM_COEFFS - 1 - i] * coeff[i];
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return clip23(norm13(pred));
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}
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int ff_dcaadpcm_subband_analysis(const DCAADPCMEncContext *s, const int32_t *input, int len, int *diff);
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int ff_dcaadpcm_do_real(int pred_vq_index,
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softfloat quant, int32_t scale_factor, int32_t step_size,
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const int32_t *prev_hist, const int32_t *in, int32_t *next_hist, int32_t *out,
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int len, int32_t peak);
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av_cold int ff_dcaadpcm_init(DCAADPCMEncContext *s);
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av_cold void ff_dcaadpcm_free(DCAADPCMEncContext *s);
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#endif /* AVCODEC_DCAADPCM_H */
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