libavcodec/acelp_pitch_delay.h

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/*
 * gain code, gain pitch and pitch delay decoding
 *
 * 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_PITCH_DELAY_H
#define AVCODEC_ACELP_PITCH_DELAY_H

#include <stdint.h>
#include "dsputil.h"

#define PITCH_DELAY_MIN             20
#define PITCH_DELAY_MAX             143

int ff_acelp_decode_8bit_to_1st_delay3(int ac_index);

int ff_acelp_decode_5_6_bit_to_2nd_delay3(
        int ac_index,
        int pitch_delay_min);

int ff_acelp_decode_4bit_to_2nd_delay3(
        int ac_index,
        int pitch_delay_min);

int ff_acelp_decode_9bit_to_1st_delay6(int ac_index);

int ff_acelp_decode_6bit_to_2nd_delay6(
        int ac_index,
        int pitch_delay_min);

void ff_acelp_update_past_gain(
        int16_t* quant_energy,
        int gain_corr_factor,
        int log2_ma_pred_order,
        int erasure);

int16_t ff_acelp_decode_gain_code(
    DSPContext *dsp,
    int gain_corr_factor,
    const int16_t* fc_v,
    int mr_energy,
    const int16_t* quant_energy,
    const int16_t* ma_prediction_coeff,
    int subframe_size,
    int max_pred_order);

float ff_amr_set_fixed_gain(float fixed_gain_factor, float fixed_mean_energy,
                            float *prediction_error, float energy_mean,
                            const float *pred_table);


void ff_decode_pitch_lag(int *lag_int, int *lag_frac, int pitch_index,
                         const int prev_lag_int, const int subframe,
                         int third_as_first, int resolution);

#endif /* AVCODEC_ACELP_PITCH_DELAY_H */

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