3 * Copyright (C) 2017 Daniil Cherednik
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #ifndef AVCODEC_DCAADPCM_H
23 #define AVCODEC_DCAADPCM_H
29 typedef struct DCAADPCMEncContext {
33 static inline int64_t ff_dcaadpcm_predict(int pred_vq_index, const int32_t *input)
36 const int16_t *coeff = ff_dca_adpcm_vb[pred_vq_index];
38 for (i = 0; i < DCA_ADPCM_COEFFS; i++)
39 pred += (int64_t)input[DCA_ADPCM_COEFFS - 1 - i] * coeff[i];
41 return clip23(norm13(pred));
44 int ff_dcaadpcm_subband_analysis(const DCAADPCMEncContext *s, const int32_t *input, int len, int *diff);
46 int ff_dcaadpcm_do_real(int pred_vq_index,
47 softfloat quant, int32_t scale_factor, int32_t step_size,
48 const int32_t *prev_hist, const int32_t *in, int32_t *next_hist, int32_t *out,
49 int len, int32_t peak);
51 av_cold int ff_dcaadpcm_init(DCAADPCMEncContext *s);
52 av_cold void ff_dcaadpcm_free(DCAADPCMEncContext *s);
54 #endif /* AVCODEC_DCAADPCM_H */