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434 lines
27 KiB
C
434 lines
27 KiB
C
/***********************************************************************
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Copyright (c) 2006-2012, 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, (subject to the limitations in the disclaimer below)
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are permitted provided that the following conditions 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 Skype Limited, nor the names of specific
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contributors, may be used to endorse or promote products derived from
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this software without specific prior written permission.
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NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
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BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
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BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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***********************************************************************/
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#ifndef SKP_SILK_MAIN_FLP_H
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#define SKP_SILK_MAIN_FLP_H
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#include "SKP_Silk_SigProc_FLP.h"
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#include "SKP_Silk_SigProc_FIX.h"
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#include "SKP_Silk_structs_FLP.h"
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#include "SKP_Silk_tables_FLP.h"
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#include "SKP_Silk_main.h"
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/* uncomment to compile without SSE optimizations */
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//#undef SKP_USE_SSE
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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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void SKP_Silk_LBRR_ctrl_FLP(
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SKP_Silk_encoder_state_FLP *psEnc, /* I Encoder state FLP */
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SKP_Silk_encoder_control *psEncCtrl /* I/O Encoder control */
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);
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void SKP_Silk_LTP_scale_ctrl_FLP(
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SKP_Silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
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SKP_Silk_encoder_control_FLP *psEncCtrl /* I/O Encoder control FLP */
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);
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void SKP_Silk_quant_LTP_gains_FLP(
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SKP_float B[ NB_SUBFR * LTP_ORDER ], /* I/O (Un-)quantized LTP gains */
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SKP_int cbk_index[ NB_SUBFR ], /* O Codebook index */
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SKP_int *periodicity_index, /* O Periodicity index */
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const SKP_float W[ NB_SUBFR*LTP_ORDER*LTP_ORDER ], /* I Error weights */
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const SKP_float mu, /* I Mu value (R/D tradeoff) */
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const SKP_int lowComplexity /* I Flag for low complexity */
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);
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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 SKP_Silk_HP_variable_cutoff_FLP(
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SKP_Silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
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SKP_Silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */
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SKP_int16 *out, /* O High-pass filtered output signal */
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const SKP_int16 *in /* I Input signal */
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);
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/* Encoder main function */
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SKP_int SKP_Silk_encode_frame_FLP(
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SKP_Silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
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SKP_uint8 *pCode, /* O Payload */
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SKP_int16 *pnBytesOut, /* I/O Number of payload bytes; */
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/* input: max length; output: used */
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const SKP_int16 *pIn /* I Input speech frame */
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);
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/* Limit, stabilize, and quantize NLSFs */
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void SKP_Silk_process_NLSFs_FLP(
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SKP_Silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
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SKP_Silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */
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SKP_float *pNLSF /* I/O NLSFs (quantized output) */
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);
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/* Low Bitrate Redundancy (LBRR) encoding. Reuse all parameters but encode with lower bitrate */
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void SKP_Silk_LBRR_encode_FLP(
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SKP_Silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
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SKP_Silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */
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SKP_uint8 *pCode, /* O Payload */
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SKP_int16 *pnBytesOut, /* I/O Payload bytes; in: max; out: used */
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const SKP_float xfw[] /* I Input signal */
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);
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/* Initializes the Silk encoder state */
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SKP_int SKP_Silk_init_encoder_FLP(
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SKP_Silk_encoder_state_FLP *psEnc /* I/O Encoder state FLP */
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);
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/* Control the Silk encoder */
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SKP_int SKP_Silk_control_encoder_FLP(
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SKP_Silk_encoder_state_FLP *psEnc, /* I/O Pointer to Silk encoder state FLP */
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const SKP_int PacketSize_ms, /* I Packet length (ms) */
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const SKP_int32 TargetRate_bps, /* I Target max bitrate (bps) */
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const SKP_int PacketLoss_perc, /* I Packet loss rate (in percent) */
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const SKP_int DTX_enabled, /* I Enable / disable DTX */
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const SKP_int Complexity /* I Complexity (0->low; 1->medium; 2->high) */
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);
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/****************/
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/* Prefiltering */
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/****************/
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void SKP_Silk_prefilter_FLP(
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SKP_Silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
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const SKP_Silk_encoder_control_FLP *psEncCtrl, /* I Encoder control FLP */
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SKP_float xw[], /* O Weighted signal */
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const SKP_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 SKP_Silk_noise_shape_analysis_FLP(
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SKP_Silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
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SKP_Silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */
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const SKP_float *pitch_res, /* I LPC residual from pitch analysis */
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const SKP_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 SKP_Silk_warped_autocorrelation_FLP(
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SKP_float *corr, /* O Result [order + 1] */
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const SKP_float *input, /* I Input data to correlate */
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const SKP_float warping, /* I Warping coefficient */
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const SKP_int length, /* I Length of input */
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const SKP_int order /* I Correlation order (even) */
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);
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/**************/
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/* Find pitch */
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/**************/
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void SKP_Silk_find_pitch_lags_FLP(
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SKP_Silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
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SKP_Silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */
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SKP_float res[], /* O Residual */
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const SKP_float x[] /* I Speech signal */
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);
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/******************/
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/* NLSF Quantizer */
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/******************/
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/* NLSF vector encoder */
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void SKP_Silk_NLSF_MSVQ_encode_FLP(
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SKP_int *NLSFIndices, /* O Codebook path vector [ CB_STAGES ] */
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SKP_float *pNLSF, /* I/O Quantized NLSF vector [ LPC_ORDER ] */
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const SKP_Silk_NLSF_CB_FLP *psNLSF_CB_FLP, /* I Codebook object */
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const SKP_float *pNLSF_q_prev, /* I Prev. quantized NLSF vector [LPC_ORDER] */
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const SKP_float *pW, /* I NLSF weight vector [ LPC_ORDER ] */
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const SKP_float NLSF_mu, /* I Rate weight for the RD optimization */
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const SKP_float NLSF_mu_fluc_red, /* I Fluctuation reduction error weight */
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const SKP_int NLSF_MSVQ_Survivors,/* I Max survivors from each stage */
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const SKP_int LPC_order, /* I LPC order */
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const SKP_int deactivate_fluc_red /* I Deactivate fluctuation reduction */
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);
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/* NLSF vector decoder */
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void SKP_Silk_NLSF_MSVQ_decode_FLP(
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SKP_float *pNLSF, /* O Decoded output vector [ LPC_ORDER ] */
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const SKP_Silk_NLSF_CB_FLP *psNLSF_CB_FLP, /* I NLSF codebook struct */
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const SKP_int *NLSFIndices, /* I NLSF indices [ nStages ] */
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const SKP_int LPC_order /* I LPC order used */
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);
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/* Rate-Distortion calculations for multiple input data vectors */
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void SKP_Silk_NLSF_VQ_rate_distortion_FLP(
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SKP_float *pRD, /* O Rate-distortion values [psNLSF_CBS_FLP->nVectors*N] */
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const SKP_Silk_NLSF_CBS_FLP *psNLSF_CBS_FLP, /* I NLSF codebook stage struct */
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const SKP_float *in, /* I Input vectors to be quantized */
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const SKP_float *w, /* I Weight vector */
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const SKP_float *rate_acc, /* I Accumulated rates from previous stage */
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const SKP_float mu, /* I Weight between weighted error and rate */
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const SKP_int N, /* I Number of input vectors to be quantized */
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const SKP_int LPC_order /* I LPC order */
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);
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/* compute weighted quantization errors for LPC_order element input vectors, over one codebook stage */
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void SKP_Silk_NLSF_VQ_sum_error_FLP(
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SKP_float *err, /* O Weighted quantization errors [ N * K ] */
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const SKP_float *in, /* I Input vectors [ N * LPC_order ] */
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const SKP_float *w, /* I Weighting vectors [ N * LPC_order ] */
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const SKP_float *pCB, /* I Codebook vectors [ K * LPC_order ] */
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const SKP_int N, /* I Number of input vectors */
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const SKP_int K, /* I Number of codebook vectors */
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const SKP_int LPC_order /* I LPC order */
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);
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/* Residual energy: nrg = wxx - 2 * wXx * c + c' * wXX * c */
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SKP_float SKP_Silk_residual_energy_covar_FLP( /* O Weighted residual energy */
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const SKP_float *c, /* I Filter coefficients */
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SKP_float *wXX, /* I/O Weighted correlation matrix, reg. out */
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const SKP_float *wXx, /* I Weighted correlation vector */
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const SKP_float wxx, /* I Weighted correlation value */
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const SKP_int D /* I Dimension */
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);
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/* Entropy constrained MATRIX-weighted VQ, for a single input data vector */
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void SKP_Silk_VQ_WMat_EC_FLP(
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SKP_int *ind, /* O Index of best codebook vector */
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SKP_float *rate_dist, /* O Best weighted quant. error + mu * rate */
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const SKP_float *in, /* I Input vector to be quantized */
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const SKP_float *W, /* I Weighting matrix */
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const SKP_int16 *cb, /* I Codebook */
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const SKP_int16 *cl_Q6, /* I Code length for each codebook vector */
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const SKP_float mu, /* I Tradeoff between WSSE and rate */
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const SKP_int L /* I Number of vectors in codebook */
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);
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/* Processing of gains */
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void SKP_Silk_process_gains_FLP(
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SKP_Silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
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SKP_Silk_encoder_control_FLP *psEncCtrl /* I/O Encoder control FLP */
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);
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void SKP_Silk_find_LTP_FLP(
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SKP_float b[ NB_SUBFR * LTP_ORDER ], /* O LTP coefs */
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SKP_float WLTP[NB_SUBFR*LTP_ORDER*LTP_ORDER], /* O Weight for LTP quantization */
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SKP_float *LTPredCodGain, /* O LTP coding gain */
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const SKP_float r_first[], /* I LPC residual, signal + state for 10 ms */
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const SKP_float r_last[], /* I LPC residual, signal + state for 10 ms */
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const SKP_int lag[ NB_SUBFR ], /* I LTP lags */
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const SKP_float Wght[ NB_SUBFR ], /* I Weights */
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const SKP_int subfr_length, /* I Subframe length */
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const SKP_int mem_offset /* I Number of samples in LTP memory */
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);
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void SKP_Silk_find_LPC_FLP(
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SKP_float NLSF[], /* O NLSFs */
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SKP_int *interpIndex, /* O NLSF interp. index for NLSF interp. */
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const SKP_float prev_NLSFq[], /* I Previous NLSFs, for NLSF interpolation */
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const SKP_int useInterpNLSFs, /* I Flag */
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const SKP_int LPC_order, /* I LPC order */
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const SKP_float x[], /* I Input signal */
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const SKP_int subfr_length /* I Subframe length incl preceeding samples */
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);
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void SKP_Silk_LTP_analysis_filter_FLP(
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SKP_float *LTP_res, /* O LTP res NB_SUBFR*(pre_lgth+subfr_lngth) */
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const SKP_float *x, /* I Input signal, with preceeding samples */
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const SKP_float B[ LTP_ORDER * NB_SUBFR ], /* I LTP coefficients for each subframe */
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const SKP_int pitchL[ NB_SUBFR ], /* I Pitch lags */
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const SKP_float invGains[ NB_SUBFR ], /* I Inverse quantization gains */
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const SKP_int subfr_length, /* I Length of each subframe */
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const SKP_int pre_length /* I Preceeding samples for each subframe */
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);
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void SKP_Silk_residual_energy_FLP(
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SKP_float nrgs[ NB_SUBFR ], /* O Residual energy per subframe */
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const SKP_float x[], /* I Input signal */
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SKP_float a[ 2 ][ MAX_LPC_ORDER ],/* I AR coefs for each frame half */
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const SKP_float gains[], /* I Quantization gains */
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const SKP_int subfr_length, /* I Subframe length */
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const SKP_int LPC_order /* I LPC order */
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);
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void SKP_Silk_find_pred_coefs_FLP(
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SKP_Silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
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SKP_Silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */
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const SKP_float res_pitch[] /* I Residual from pitch analysis */
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);
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/* 16th order LPC analysis filter */
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void SKP_Silk_LPC_analysis_filter_FLP(
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SKP_float r_LPC[], /* O LPC residual signal */
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const SKP_float PredCoef[], /* I LPC coefficients */
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const SKP_float s[], /* I Input signal */
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const SKP_int length, /* I Length of input signal */
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const SKP_int Order /* I LPC order */
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);
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/* 16th order LPC analysis filter, does not write first 16 samples */
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void SKP_Silk_LPC_analysis_filter16_FLP(
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SKP_float r_LPC[], /* O LPC residual signal */
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const SKP_float PredCoef[], /* I LPC coefficients */
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const SKP_float s[], /* I Input signal */
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const SKP_int length /* I Length of input signal */
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);
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/* 12th order LPC analysis filter, does not write first 12 samples */
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void SKP_Silk_LPC_analysis_filter12_FLP(
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SKP_float r_LPC[], /* O LPC residual signal */
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const SKP_float PredCoef[], /* I LPC coefficients */
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const SKP_float s[], /* I Input signal */
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const SKP_int length /* I Length of input signal */
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);
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/* 10th order LPC analysis filter, does not write first 10 samples */
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void SKP_Silk_LPC_analysis_filter10_FLP(
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SKP_float r_LPC[], /* O LPC residual signal */
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const SKP_float PredCoef[], /* I LPC coefficients */
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const SKP_float s[], /* I Input signal */
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const SKP_int length /* I Length of input signal */
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);
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/* 8th order LPC analysis filter, does not write first 8 samples */
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void SKP_Silk_LPC_analysis_filter8_FLP(
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SKP_float r_LPC[], /* O LPC residual signal */
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const SKP_float PredCoef[], /* I LPC coefficients */
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const SKP_float s[], /* I Input signal */
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const SKP_int length /* I Length of input signal */
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);
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/* 6th order LPC analysis filter, does not write first 6 samples */
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void SKP_Silk_LPC_analysis_filter6_FLP(
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SKP_float r_LPC[], /* O LPC residual signal */
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const SKP_float PredCoef[], /* I LPC coefficients */
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const SKP_float s[], /* I Input signal */
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const SKP_int length /* I Length of input signal */
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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 SKP_Silk_corrMatrix_FLP(
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const SKP_float *x, /* I x vector [ L+order-1 ] used to create X */
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const SKP_int L, /* I Length of vectors */
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const SKP_int Order, /* I Max lag for correlation */
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SKP_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 SKP_Silk_corrVector_FLP(
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const SKP_float *x, /* I x vector [L+order-1] used to create X */
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const SKP_float *t, /* I Target vector [L] */
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const SKP_int L, /* I Length of vecors */
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const SKP_int Order, /* I Max lag for correlation */
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SKP_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 SKP_Silk_regularize_correlations_FLP(
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SKP_float *XX, /* I/O Correlation matrices */
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SKP_float *xx, /* I/O Correlation values */
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const SKP_float noise, /* I Noise energy to add */
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const SKP_int D /* I Dimension of XX */
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);
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/* Function to solve linear equation Ax = b, when A is an MxM symmetric square matrix */
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void SKP_Silk_solve_LDL_FLP(
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SKP_float *A, /* I/O Symmetric square matrix, out: reg. */
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const SKP_int M, /* I Size of matrix */
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const SKP_float *b, /* I Pointer to b vector */
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SKP_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 SKP_Silk_apply_sine_window_FLP(
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SKP_float px_win[], /* O Pointer to windowed signal */
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const SKP_float px[], /* I Pointer to input signal */
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const SKP_int win_type, /* I Selects a window type */
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const SKP_int length /* I Window length, multiple of 4 */
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);
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/* Wrappers. Calls flp / fix code */
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/* Convert AR filter coefficients to NLSF parameters */
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void SKP_Silk_A2NLSF_FLP(
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SKP_float *pNLSF, /* O NLSF vector [ LPC_order ] */
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const SKP_float *pAR, /* I LPC coefficients [ LPC_order ] */
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const SKP_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 SKP_Silk_NLSF2A_stable_FLP(
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SKP_float *pAR, /* O LPC coefficients [ LPC_order ] */
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const SKP_float *pNLSF, /* I NLSF vector [ LPC_order ] */
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const SKP_int LPC_order /* I LPC order */
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);
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/* NLSF stabilizer, for a single input data vector */
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void SKP_Silk_NLSF_stabilize_FLP(
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SKP_float *pNLSF, /* I/O (Un)stable NLSF vector [ LPC_order ] */
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const SKP_float *pNDelta_min, /* I Normalized delta min vector[LPC_order+1]*/
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const SKP_int LPC_order /* I LPC order */
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);
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/* Interpolation function with fixed point rounding */
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void SKP_Silk_interpolate_wrapper_FLP(
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SKP_float xi[], /* O Interpolated vector */
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const SKP_float x0[], /* I First vector */
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const SKP_float x1[], /* I Second vector */
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const SKP_float ifact, /* I Interp. factor, weight on second vector */
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const SKP_int d /* I Number of parameters */
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);
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|
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/****************************************/
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/* Floating-point Silk VAD wrapper */
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/****************************************/
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SKP_int SKP_Silk_VAD_FLP(
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SKP_Silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
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SKP_Silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */
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const SKP_int16 *pIn /* I Input signal */
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|
);
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|
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|
/****************************************/
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/* Floating-point Silk NSQ wrapper */
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|
/****************************************/
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void SKP_Silk_NSQ_wrapper_FLP(
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SKP_Silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
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SKP_Silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */
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const SKP_float x[], /* I Prefiltered input signal */
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SKP_int8 q[], /* O Quantized pulse signal */
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const SKP_int useLBRR /* I LBRR flag */
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);
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|
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|
/* using log2() helps the fixed-point conversion */
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SKP_INLINE SKP_float SKP_Silk_log2( double x ) { return ( SKP_float )( 3.32192809488736 * log10( x ) ); }
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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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