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libavcodec/acelp_pitch_delay.h

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00001 /*
00002  * gain code, gain pitch and pitch delay decoding
00003  *
00004  * Copyright (c) 2008 Vladimir Voroshilov
00005  *
00006  * This file is part of FFmpeg.
00007  *
00008  * FFmpeg is free software; you can redistribute it and/or
00009  * modify it under the terms of the GNU Lesser General Public
00010  * License as published by the Free Software Foundation; either
00011  * version 2.1 of the License, or (at your option) any later version.
00012  *
00013  * FFmpeg is distributed in the hope that it will be useful,
00014  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00015  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00016  * Lesser General Public License for more details.
00017  *
00018  * You should have received a copy of the GNU Lesser General Public
00019  * License along with FFmpeg; if not, write to the Free Software
00020  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00021  */
00022 
00023 #ifndef AVCODEC_ACELP_PITCH_DELAY_H
00024 #define AVCODEC_ACELP_PITCH_DELAY_H
00025 
00026 #include <stdint.h>
00027 #include "dsputil.h"
00028 
00029 #define PITCH_DELAY_MIN             20
00030 #define PITCH_DELAY_MAX             143
00031 
00043 int ff_acelp_decode_8bit_to_1st_delay3(int ac_index);
00044 
00060 int ff_acelp_decode_5_6_bit_to_2nd_delay3(
00061         int ac_index,
00062         int pitch_delay_min);
00063 
00080 int ff_acelp_decode_4bit_to_2nd_delay3(
00081         int ac_index,
00082         int pitch_delay_min);
00083 
00099 int ff_acelp_decode_9bit_to_1st_delay6(int ac_index);
00100 
00115 int ff_acelp_decode_6bit_to_2nd_delay6(
00116         int ac_index,
00117         int pitch_delay_min);
00118 
00135 void ff_acelp_update_past_gain(
00136         int16_t* quant_energy,
00137         int gain_corr_factor,
00138         int log2_ma_pred_order,
00139         int erasure);
00140 
00213 int16_t ff_acelp_decode_gain_code(
00214     DSPContext *dsp,
00215     int gain_corr_factor,
00216     const int16_t* fc_v,
00217     int mr_energy,
00218     const int16_t* quant_energy,
00219     const int16_t* ma_prediction_coeff,
00220     int subframe_size,
00221     int max_pred_order);
00222 
00233 float ff_amr_set_fixed_gain(float fixed_gain_factor, float fixed_mean_energy,
00234                             float *prediction_error, float energy_mean,
00235                             const float *pred_table);
00236 
00237 
00251 void ff_decode_pitch_lag(int *lag_int, int *lag_frac, int pitch_index,
00252                          const int prev_lag_int, const int subframe,
00253                          int third_as_first, int resolution);
00254 
00255 #endif /* AVCODEC_ACELP_PITCH_DELAY_H */

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