55 lines
1.8 KiB
C
55 lines
1.8 KiB
C
|
/*
|
||
|
|
* 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 */
|