313 lines
21 KiB
C
313 lines
21 KiB
C
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/***********************************************************************
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Copyright (c) 2006-2011, Skype Limited. All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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- Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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- Neither the name of Internet Society, IETF or IETF Trust, nor the
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names of specific contributors, may be used to endorse or promote
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products derived from this software without specific prior written
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permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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***********************************************************************/
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#ifndef SILK_MAIN_FLP_H
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#define SILK_MAIN_FLP_H
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#include "SigProc_FLP.h"
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#include "SigProc_FIX.h"
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#include "structs_FLP.h"
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#include "main.h"
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#include "define.h"
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#include "debug.h"
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#include "entenc.h"
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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#define silk_encoder_state_Fxx silk_encoder_state_FLP
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#define silk_encode_do_VAD_Fxx silk_encode_do_VAD_FLP
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#define silk_encode_frame_Fxx silk_encode_frame_FLP
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/*********************/
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/* Encoder Functions */
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/*********************/
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/* High-pass filter with cutoff frequency adaptation based on pitch lag statistics */
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void silk_HP_variable_cutoff(
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silk_encoder_state_Fxx state_Fxx[] /* I/O Encoder states */
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);
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/* Encoder main function */
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void silk_encode_do_VAD_FLP(
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silk_encoder_state_FLP *psEnc /* I/O Encoder state FLP */
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);
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/* Encoder main function */
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opus_int silk_encode_frame_FLP(
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silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
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opus_int32 *pnBytesOut, /* O Number of payload bytes; */
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ec_enc *psRangeEnc, /* I/O compressor data structure */
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opus_int condCoding, /* I The type of conditional coding to use */
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opus_int maxBits, /* I If > 0: maximum number of output bits */
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opus_int useCBR /* I Flag to force constant-bitrate operation */
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);
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/* Initializes the Silk encoder state */
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opus_int silk_init_encoder(
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silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
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int arch /* I Run-tim architecture */
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);
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/* Control the Silk encoder */
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opus_int silk_control_encoder(
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silk_encoder_state_FLP *psEnc, /* I/O Pointer to Silk encoder state FLP */
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silk_EncControlStruct *encControl, /* I Control structure */
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const opus_int32 TargetRate_bps, /* I Target max bitrate (bps) */
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const opus_int allow_bw_switch, /* I Flag to allow switching audio bandwidth */
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const opus_int channelNb, /* I Channel number */
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const opus_int force_fs_kHz
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);
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/****************/
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/* Prefiltering */
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/****************/
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void silk_prefilter_FLP(
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silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
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const silk_encoder_control_FLP *psEncCtrl, /* I Encoder control FLP */
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silk_float xw[], /* O Weighted signal */
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const silk_float x[] /* I Speech signal */
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);
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/**************************/
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/* Noise shaping analysis */
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/**************************/
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/* Compute noise shaping coefficients and initial gain values */
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void silk_noise_shape_analysis_FLP(
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silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
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silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */
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const silk_float *pitch_res, /* I LPC residual from pitch analysis */
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const silk_float *x /* I Input signal [frame_length + la_shape] */
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);
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/* Autocorrelations for a warped frequency axis */
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void silk_warped_autocorrelation_FLP(
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silk_float *corr, /* O Result [order + 1] */
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const silk_float *input, /* I Input data to correlate */
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const silk_float warping, /* I Warping coefficient */
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const opus_int length, /* I Length of input */
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const opus_int order /* I Correlation order (even) */
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);
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/* Calculation of LTP state scaling */
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void silk_LTP_scale_ctrl_FLP(
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silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
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silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */
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opus_int condCoding /* I The type of conditional coding to use */
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);
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/**********************************************/
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/* Prediction Analysis */
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/**********************************************/
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/* Find pitch lags */
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void silk_find_pitch_lags_FLP(
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silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
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silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */
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silk_float res[], /* O Residual */
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const silk_float x[], /* I Speech signal */
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int arch /* I Run-time architecture */
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);
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/* Find LPC and LTP coefficients */
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void silk_find_pred_coefs_FLP(
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silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
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silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */
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const silk_float res_pitch[], /* I Residual from pitch analysis */
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const silk_float x[], /* I Speech signal */
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opus_int condCoding /* I The type of conditional coding to use */
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);
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/* LPC analysis */
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void silk_find_LPC_FLP(
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silk_encoder_state *psEncC, /* I/O Encoder state */
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opus_int16 NLSF_Q15[], /* O NLSFs */
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const silk_float x[], /* I Input signal */
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const silk_float minInvGain /* I Prediction gain from LTP (dB) */
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);
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/* LTP analysis */
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void silk_find_LTP_FLP(
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silk_float b[ MAX_NB_SUBFR * LTP_ORDER ], /* O LTP coefs */
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silk_float WLTP[ MAX_NB_SUBFR * LTP_ORDER * LTP_ORDER ], /* O Weight for LTP quantization */
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silk_float *LTPredCodGain, /* O LTP coding gain */
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const silk_float r_lpc[], /* I LPC residual */
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const opus_int lag[ MAX_NB_SUBFR ], /* I LTP lags */
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const silk_float Wght[ MAX_NB_SUBFR ], /* I Weights */
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const opus_int subfr_length, /* I Subframe length */
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const opus_int nb_subfr, /* I number of subframes */
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const opus_int mem_offset /* I Number of samples in LTP memory */
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);
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void silk_LTP_analysis_filter_FLP(
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silk_float *LTP_res, /* O LTP res MAX_NB_SUBFR*(pre_lgth+subfr_lngth) */
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const silk_float *x, /* I Input signal, with preceding samples */
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const silk_float B[ LTP_ORDER * MAX_NB_SUBFR ], /* I LTP coefficients for each subframe */
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const opus_int pitchL[ MAX_NB_SUBFR ], /* I Pitch lags */
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const silk_float invGains[ MAX_NB_SUBFR ], /* I Inverse quantization gains */
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const opus_int subfr_length, /* I Length of each subframe */
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const opus_int nb_subfr, /* I number of subframes */
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const opus_int pre_length /* I Preceding samples for each subframe */
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);
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/* Calculates residual energies of input subframes where all subframes have LPC_order */
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/* of preceding samples */
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void silk_residual_energy_FLP(
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silk_float nrgs[ MAX_NB_SUBFR ], /* O Residual energy per subframe */
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const silk_float x[], /* I Input signal */
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silk_float a[ 2 ][ MAX_LPC_ORDER ], /* I AR coefs for each frame half */
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const silk_float gains[], /* I Quantization gains */
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const opus_int subfr_length, /* I Subframe length */
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const opus_int nb_subfr, /* I number of subframes */
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const opus_int LPC_order /* I LPC order */
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);
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/* 16th order LPC analysis filter */
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void silk_LPC_analysis_filter_FLP(
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silk_float r_LPC[], /* O LPC residual signal */
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const silk_float PredCoef[], /* I LPC coefficients */
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const silk_float s[], /* I Input signal */
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const opus_int length, /* I Length of input signal */
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const opus_int Order /* I LPC order */
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);
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/* LTP tap quantizer */
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void silk_quant_LTP_gains_FLP(
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silk_float B[ MAX_NB_SUBFR * LTP_ORDER ], /* I/O (Un-)quantized LTP gains */
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opus_int8 cbk_index[ MAX_NB_SUBFR ], /* O Codebook index */
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opus_int8 *periodicity_index, /* O Periodicity index */
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opus_int32 *sum_log_gain_Q7, /* I/O Cumulative max prediction gain */
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const silk_float W[ MAX_NB_SUBFR * LTP_ORDER * LTP_ORDER ], /* I Error weights */
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const opus_int mu_Q10, /* I Mu value (R/D tradeoff) */
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const opus_int lowComplexity, /* I Flag for low complexity */
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const opus_int nb_subfr /* I number of subframes */
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);
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/* Residual energy: nrg = wxx - 2 * wXx * c + c' * wXX * c */
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silk_float silk_residual_energy_covar_FLP( /* O Weighted residual energy */
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const silk_float *c, /* I Filter coefficients */
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silk_float *wXX, /* I/O Weighted correlation matrix, reg. out */
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const silk_float *wXx, /* I Weighted correlation vector */
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const silk_float wxx, /* I Weighted correlation value */
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const opus_int D /* I Dimension */
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);
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/* Processing of gains */
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void silk_process_gains_FLP(
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silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
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silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */
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opus_int condCoding /* I The type of conditional coding to use */
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);
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/******************/
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/* Linear Algebra */
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/******************/
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/* Calculates correlation matrix X'*X */
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void silk_corrMatrix_FLP(
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const silk_float *x, /* I x vector [ L+order-1 ] used to create X */
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const opus_int L, /* I Length of vectors */
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const opus_int Order, /* I Max lag for correlation */
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silk_float *XX /* O X'*X correlation matrix [order x order] */
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);
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/* Calculates correlation vector X'*t */
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void silk_corrVector_FLP(
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const silk_float *x, /* I x vector [L+order-1] used to create X */
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const silk_float *t, /* I Target vector [L] */
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const opus_int L, /* I Length of vecors */
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const opus_int Order, /* I Max lag for correlation */
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silk_float *Xt /* O X'*t correlation vector [order] */
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);
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/* Add noise to matrix diagonal */
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void silk_regularize_correlations_FLP(
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silk_float *XX, /* I/O Correlation matrices */
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silk_float *xx, /* I/O Correlation values */
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const silk_float noise, /* I Noise energy to add */
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const opus_int D /* I Dimension of XX */
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);
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/* Function to solve linear equation Ax = b, where A is an MxM symmetric matrix */
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void silk_solve_LDL_FLP(
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silk_float *A, /* I/O Symmetric square matrix, out: reg. */
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const opus_int M, /* I Size of matrix */
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const silk_float *b, /* I Pointer to b vector */
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silk_float *x /* O Pointer to x solution vector */
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);
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/* Apply sine window to signal vector. */
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/* Window types: */
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/* 1 -> sine window from 0 to pi/2 */
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/* 2 -> sine window from pi/2 to pi */
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void silk_apply_sine_window_FLP(
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silk_float px_win[], /* O Pointer to windowed signal */
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const silk_float px[], /* I Pointer to input signal */
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const opus_int win_type, /* I Selects a window type */
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const opus_int length /* I Window length, multiple of 4 */
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);
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/* Wrapper functions. Call flp / fix code */
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/* Convert AR filter coefficients to NLSF parameters */
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void silk_A2NLSF_FLP(
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opus_int16 *NLSF_Q15, /* O NLSF vector [ LPC_order ] */
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const silk_float *pAR, /* I LPC coefficients [ LPC_order ] */
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const opus_int LPC_order /* I LPC order */
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);
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/* Convert NLSF parameters to AR prediction filter coefficients */
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void silk_NLSF2A_FLP(
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silk_float *pAR, /* O LPC coefficients [ LPC_order ] */
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const opus_int16 *NLSF_Q15, /* I NLSF vector [ LPC_order ] */
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const opus_int LPC_order /* I LPC order */
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);
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/* Limit, stabilize, and quantize NLSFs */
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void silk_process_NLSFs_FLP(
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silk_encoder_state *psEncC, /* I/O Encoder state */
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silk_float PredCoef[ 2 ][ MAX_LPC_ORDER ], /* O Prediction coefficients */
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opus_int16 NLSF_Q15[ MAX_LPC_ORDER ], /* I/O Normalized LSFs (quant out) (0 - (2^15-1)) */
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const opus_int16 prev_NLSF_Q15[ MAX_LPC_ORDER ] /* I Previous Normalized LSFs (0 - (2^15-1)) */
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);
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/* Floating-point Silk NSQ wrapper */
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void silk_NSQ_wrapper_FLP(
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silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
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silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */
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SideInfoIndices *psIndices, /* I/O Quantization indices */
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silk_nsq_state *psNSQ, /* I/O Noise Shaping Quantzation state */
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opus_int8 pulses[], /* O Quantized pulse signal */
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const silk_float x[] /* I Prefiltered input signal */
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);
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#ifdef __cplusplus
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}
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#endif
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#endif
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