1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
|
/*
* 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 */
|
