libavcodec/acelp_vectors.h

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/*
 * adaptive and fixed codebook vector operations for ACELP-based codecs
 *
 * Copyright (c) 2008 Vladimir Voroshilov
 *
 * 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_ACELP_VECTORS_H
#define AVCODEC_ACELP_VECTORS_H

#include <stdint.h>

typedef struct ACELPVContext {
    void (*weighted_vector_sumf)(float *out, const float *in_a, const float *in_b,
                                 float weight_coeff_a, float weight_coeff_b,
                                 int length);

}ACELPVContext;

void ff_acelp_vectors_init(ACELPVContext *c);
void ff_acelp_vectors_init_mips(ACELPVContext *c);

typedef struct {
    int      n;
    int      x[10];
    float    y[10];
    int      no_repeat_mask;
    int      pitch_lag;
    float    pitch_fac;
} AMRFixed;

extern const uint8_t ff_fc_4pulses_8bits_tracks_13[16];

extern const uint8_t ff_fc_4pulses_8bits_track_4[32];

extern const uint8_t ff_fc_2pulses_9bits_track1[16];
extern const uint8_t ff_fc_2pulses_9bits_track1_gray[16];

extern const uint8_t ff_fc_2pulses_9bits_track2_gray[32];

extern const float ff_b60_sinc[61];

extern const float ff_pow_0_7[10];

extern const float ff_pow_0_75[10];

extern const float ff_pow_0_55[10];

void ff_acelp_fc_pulse_per_track(int16_t* fc_v,
                                 const uint8_t *tab1,
                                 const uint8_t *tab2,
                                 int pulse_indexes,
                                 int pulse_signs,
                                 int pulse_count,
                                 int bits);

void ff_decode_10_pulses_35bits(const int16_t *fixed_index,
                                AMRFixed *fixed_sparse,
                                const uint8_t *gray_decode,
                                int half_pulse_count, int bits);


void ff_acelp_weighted_vector_sum(int16_t* out,
                                  const int16_t *in_a,
                                  const int16_t *in_b,
                                  int16_t weight_coeff_a,
                                  int16_t weight_coeff_b,
                                  int16_t rounder,
                                  int shift,
                                  int length);

void ff_weighted_vector_sumf(float *out, const float *in_a, const float *in_b,
                             float weight_coeff_a, float weight_coeff_b,
                             int length);

void ff_adaptive_gain_control(float *out, const float *in, float speech_energ,
                              int size, float alpha, float *gain_mem);

void ff_scale_vector_to_given_sum_of_squares(float *out, const float *in,
                                             float sum_of_squares, const int n);

void ff_set_fixed_vector(float *out, const AMRFixed *in, float scale, int size);

void ff_clear_fixed_vector(float *out, const AMRFixed *in, int size);

#endif /* AVCODEC_ACELP_VECTORS_H */

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