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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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