438 lines
30 KiB
C
438 lines
30 KiB
C
/***********************************************************************
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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_H
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#define SILK_MAIN_H
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#include "SigProc_FIX.h"
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#include "define.h"
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#include "structs.h"
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#include "tables.h"
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#include "PLC.h"
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#include "control.h"
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#include "debug.h"
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#include "entenc.h"
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#include "entdec.h"
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/* Convert Left/Right stereo signal to adaptive Mid/Side representation */
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void silk_stereo_LR_to_MS(
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stereo_enc_state *state, /* I/O State */
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opus_int16 x1[], /* I/O Left input signal, becomes mid signal */
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opus_int16 x2[], /* I/O Right input signal, becomes side signal */
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opus_int8 ix[ 2 ][ 3 ], /* O Quantization indices */
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opus_int8 *mid_only_flag, /* O Flag: only mid signal coded */
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opus_int32 mid_side_rates_bps[], /* O Bitrates for mid and side signals */
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opus_int32 total_rate_bps, /* I Total bitrate */
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opus_int prev_speech_act_Q8, /* I Speech activity level in previous frame */
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opus_int toMono, /* I Last frame before a stereo->mono transition */
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opus_int fs_kHz, /* I Sample rate (kHz) */
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opus_int frame_length /* I Number of samples */
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);
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/* Convert adaptive Mid/Side representation to Left/Right stereo signal */
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void silk_stereo_MS_to_LR(
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stereo_dec_state *state, /* I/O State */
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opus_int16 x1[], /* I/O Left input signal, becomes mid signal */
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opus_int16 x2[], /* I/O Right input signal, becomes side signal */
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const opus_int32 pred_Q13[], /* I Predictors */
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opus_int fs_kHz, /* I Samples rate (kHz) */
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opus_int frame_length /* I Number of samples */
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);
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/* Find least-squares prediction gain for one signal based on another and quantize it */
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opus_int32 silk_stereo_find_predictor( /* O Returns predictor in Q13 */
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opus_int32 *ratio_Q14, /* O Ratio of residual and mid energies */
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const opus_int16 x[], /* I Basis signal */
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const opus_int16 y[], /* I Target signal */
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opus_int32 mid_res_amp_Q0[], /* I/O Smoothed mid, residual norms */
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opus_int length, /* I Number of samples */
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opus_int smooth_coef_Q16 /* I Smoothing coefficient */
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);
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/* Quantize mid/side predictors */
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void silk_stereo_quant_pred(
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opus_int32 pred_Q13[], /* I/O Predictors (out: quantized) */
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opus_int8 ix[ 2 ][ 3 ] /* O Quantization indices */
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);
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/* Entropy code the mid/side quantization indices */
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void silk_stereo_encode_pred(
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ec_enc *psRangeEnc, /* I/O Compressor data structure */
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opus_int8 ix[ 2 ][ 3 ] /* I Quantization indices */
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);
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/* Entropy code the mid-only flag */
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void silk_stereo_encode_mid_only(
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ec_enc *psRangeEnc, /* I/O Compressor data structure */
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opus_int8 mid_only_flag
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);
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/* Decode mid/side predictors */
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void silk_stereo_decode_pred(
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ec_dec *psRangeDec, /* I/O Compressor data structure */
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opus_int32 pred_Q13[] /* O Predictors */
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);
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/* Decode mid-only flag */
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void silk_stereo_decode_mid_only(
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ec_dec *psRangeDec, /* I/O Compressor data structure */
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opus_int *decode_only_mid /* O Flag that only mid channel has been coded */
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);
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/* Encodes signs of excitation */
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void silk_encode_signs(
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ec_enc *psRangeEnc, /* I/O Compressor data structure */
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const opus_int8 pulses[], /* I pulse signal */
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opus_int length, /* I length of input */
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const opus_int signalType, /* I Signal type */
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const opus_int quantOffsetType, /* I Quantization offset type */
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const opus_int sum_pulses[ MAX_NB_SHELL_BLOCKS ] /* I Sum of absolute pulses per block */
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);
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/* Decodes signs of excitation */
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void silk_decode_signs(
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ec_dec *psRangeDec, /* I/O Compressor data structure */
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opus_int pulses[], /* I/O pulse signal */
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opus_int length, /* I length of input */
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const opus_int signalType, /* I Signal type */
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const opus_int quantOffsetType, /* I Quantization offset type */
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const opus_int sum_pulses[ MAX_NB_SHELL_BLOCKS ] /* I Sum of absolute pulses per block */
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);
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/* Check encoder control struct */
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opus_int check_control_input(
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silk_EncControlStruct *encControl /* I Control structure */
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);
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/* Control internal sampling rate */
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opus_int silk_control_audio_bandwidth(
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silk_encoder_state *psEncC, /* I/O Pointer to Silk encoder state */
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silk_EncControlStruct *encControl /* I Control structure */
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);
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/* Control SNR of redidual quantizer */
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opus_int silk_control_SNR(
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silk_encoder_state *psEncC, /* I/O Pointer to Silk encoder state */
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opus_int32 TargetRate_bps /* I Target max bitrate (bps) */
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);
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/***************/
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/* Shell coder */
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/***************/
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/* Encode quantization indices of excitation */
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void silk_encode_pulses(
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ec_enc *psRangeEnc, /* I/O compressor data structure */
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const opus_int signalType, /* I Signal type */
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const opus_int quantOffsetType, /* I quantOffsetType */
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opus_int8 pulses[], /* I quantization indices */
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const opus_int frame_length /* I Frame length */
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);
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/* Shell encoder, operates on one shell code frame of 16 pulses */
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void silk_shell_encoder(
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ec_enc *psRangeEnc, /* I/O compressor data structure */
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const opus_int *pulses0 /* I data: nonnegative pulse amplitudes */
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);
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/* Shell decoder, operates on one shell code frame of 16 pulses */
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void silk_shell_decoder(
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opus_int *pulses0, /* O data: nonnegative pulse amplitudes */
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ec_dec *psRangeDec, /* I/O Compressor data structure */
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const opus_int pulses4 /* I number of pulses per pulse-subframe */
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);
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/* Gain scalar quantization with hysteresis, uniform on log scale */
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void silk_gains_quant(
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opus_int8 ind[ MAX_NB_SUBFR ], /* O gain indices */
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opus_int32 gain_Q16[ MAX_NB_SUBFR ], /* I/O gains (quantized out) */
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opus_int8 *prev_ind, /* I/O last index in previous frame */
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const opus_int conditional, /* I first gain is delta coded if 1 */
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const opus_int nb_subfr /* I number of subframes */
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);
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/* Gains scalar dequantization, uniform on log scale */
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void silk_gains_dequant(
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opus_int32 gain_Q16[ MAX_NB_SUBFR ], /* O quantized gains */
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const opus_int8 ind[ MAX_NB_SUBFR ], /* I gain indices */
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opus_int8 *prev_ind, /* I/O last index in previous frame */
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const opus_int conditional, /* I first gain is delta coded if 1 */
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const opus_int nb_subfr /* I number of subframes */
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);
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/* Compute unique identifier of gain indices vector */
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opus_int32 silk_gains_ID( /* O returns unique identifier of gains */
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const opus_int8 ind[ MAX_NB_SUBFR ], /* I gain indices */
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const opus_int nb_subfr /* I number of subframes */
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);
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/* Interpolate two vectors */
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void silk_interpolate(
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opus_int16 xi[ MAX_LPC_ORDER ], /* O interpolated vector */
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const opus_int16 x0[ MAX_LPC_ORDER ], /* I first vector */
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const opus_int16 x1[ MAX_LPC_ORDER ], /* I second vector */
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const opus_int ifact_Q2, /* I interp. factor, weight on 2nd vector */
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const opus_int d /* I number of parameters */
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);
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/* LTP tap quantizer */
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void silk_quant_LTP_gains(
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opus_int16 B_Q14[ 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_gain_dB_Q7, /* I/O Cumulative max prediction gain */
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const opus_int32 W_Q18[ MAX_NB_SUBFR*LTP_ORDER*LTP_ORDER ], /* I Error Weights in Q18 */
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opus_int mu_Q9, /* I Mu value (R/D tradeoff) */
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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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/* Entropy constrained matrix-weighted VQ, for a single input data vector */
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void silk_VQ_WMat_EC(
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opus_int8 *ind, /* O index of best codebook vector */
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opus_int32 *rate_dist_Q14, /* O best weighted quant error + mu * rate */
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opus_int *gain_Q7, /* O sum of absolute LTP coefficients */
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const opus_int16 *in_Q14, /* I input vector to be quantized */
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const opus_int32 *W_Q18, /* I weighting matrix */
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const opus_int8 *cb_Q7, /* I codebook */
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const opus_uint8 *cb_gain_Q7, /* I codebook effective gain */
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const opus_uint8 *cl_Q5, /* I code length for each codebook vector */
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const opus_int mu_Q9, /* I tradeoff betw. weighted error and rate */
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const opus_int32 max_gain_Q7, /* I maximum sum of absolute LTP coefficients */
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opus_int L /* I number of vectors in codebook */
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);
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/************************************/
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/* Noise shaping quantization (NSQ) */
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/************************************/
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void silk_NSQ(
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const silk_encoder_state *psEncC, /* I/O Encoder State */
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silk_nsq_state *NSQ, /* I/O NSQ state */
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SideInfoIndices *psIndices, /* I/O Quantization Indices */
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const opus_int32 x_Q3[], /* I Prefiltered input signal */
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opus_int8 pulses[], /* O Quantized pulse signal */
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const opus_int16 PredCoef_Q12[ 2 * MAX_LPC_ORDER ], /* I Short term prediction coefs */
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const opus_int16 LTPCoef_Q14[ LTP_ORDER * MAX_NB_SUBFR ], /* I Long term prediction coefs */
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const opus_int16 AR2_Q13[ MAX_NB_SUBFR * MAX_SHAPE_LPC_ORDER ], /* I Noise shaping coefs */
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const opus_int HarmShapeGain_Q14[ MAX_NB_SUBFR ], /* I Long term shaping coefs */
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const opus_int Tilt_Q14[ MAX_NB_SUBFR ], /* I Spectral tilt */
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const opus_int32 LF_shp_Q14[ MAX_NB_SUBFR ], /* I Low frequency shaping coefs */
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const opus_int32 Gains_Q16[ MAX_NB_SUBFR ], /* I Quantization step sizes */
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const opus_int pitchL[ MAX_NB_SUBFR ], /* I Pitch lags */
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const opus_int Lambda_Q10, /* I Rate/distortion tradeoff */
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const opus_int LTP_scale_Q14 /* I LTP state scaling */
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);
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/* Noise shaping using delayed decision */
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void silk_NSQ_del_dec(
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const silk_encoder_state *psEncC, /* I/O Encoder State */
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silk_nsq_state *NSQ, /* I/O NSQ state */
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SideInfoIndices *psIndices, /* I/O Quantization Indices */
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const opus_int32 x_Q3[], /* I Prefiltered input signal */
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opus_int8 pulses[], /* O Quantized pulse signal */
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const opus_int16 PredCoef_Q12[ 2 * MAX_LPC_ORDER ], /* I Short term prediction coefs */
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const opus_int16 LTPCoef_Q14[ LTP_ORDER * MAX_NB_SUBFR ], /* I Long term prediction coefs */
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const opus_int16 AR2_Q13[ MAX_NB_SUBFR * MAX_SHAPE_LPC_ORDER ], /* I Noise shaping coefs */
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const opus_int HarmShapeGain_Q14[ MAX_NB_SUBFR ], /* I Long term shaping coefs */
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const opus_int Tilt_Q14[ MAX_NB_SUBFR ], /* I Spectral tilt */
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const opus_int32 LF_shp_Q14[ MAX_NB_SUBFR ], /* I Low frequency shaping coefs */
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const opus_int32 Gains_Q16[ MAX_NB_SUBFR ], /* I Quantization step sizes */
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const opus_int pitchL[ MAX_NB_SUBFR ], /* I Pitch lags */
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const opus_int Lambda_Q10, /* I Rate/distortion tradeoff */
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const opus_int LTP_scale_Q14 /* I LTP state scaling */
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);
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/************/
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/* Silk VAD */
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/************/
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/* Initialize the Silk VAD */
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opus_int silk_VAD_Init( /* O Return value, 0 if success */
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silk_VAD_state *psSilk_VAD /* I/O Pointer to Silk VAD state */
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);
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/* Get speech activity level in Q8 */
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opus_int silk_VAD_GetSA_Q8( /* O Return value, 0 if success */
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silk_encoder_state *psEncC, /* I/O Encoder state */
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const opus_int16 pIn[] /* I PCM input */
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);
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/* Low-pass filter with variable cutoff frequency based on */
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/* piece-wise linear interpolation between elliptic filters */
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/* Start by setting transition_frame_no = 1; */
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void silk_LP_variable_cutoff(
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silk_LP_state *psLP, /* I/O LP filter state */
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opus_int16 *frame, /* I/O Low-pass filtered output signal */
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const opus_int frame_length /* I Frame length */
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);
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/******************/
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/* NLSF Quantizer */
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/******************/
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/* Limit, stabilize, convert and quantize NLSFs */
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void silk_process_NLSFs(
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silk_encoder_state *psEncC, /* I/O Encoder state */
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opus_int16 PredCoef_Q12[ 2 ][ MAX_LPC_ORDER ], /* O Prediction coefficients */
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opus_int16 pNLSF_Q15[ MAX_LPC_ORDER ], /* I/O Normalized LSFs (quant out) (0 - (2^15-1)) */
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const opus_int16 prev_NLSFq_Q15[ MAX_LPC_ORDER ] /* I Previous Normalized LSFs (0 - (2^15-1)) */
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);
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opus_int32 silk_NLSF_encode( /* O Returns RD value in Q25 */
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opus_int8 *NLSFIndices, /* I Codebook path vector [ LPC_ORDER + 1 ] */
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opus_int16 *pNLSF_Q15, /* I/O Quantized NLSF vector [ LPC_ORDER ] */
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const silk_NLSF_CB_struct *psNLSF_CB, /* I Codebook object */
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const opus_int16 *pW_QW, /* I NLSF weight vector [ LPC_ORDER ] */
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const opus_int NLSF_mu_Q20, /* I Rate weight for the RD optimization */
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const opus_int nSurvivors, /* I Max survivors after first stage */
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const opus_int signalType /* I Signal type: 0/1/2 */
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);
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/* Compute quantization errors for an LPC_order element input vector for a VQ codebook */
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void silk_NLSF_VQ(
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opus_int32 err_Q26[], /* O Quantization errors [K] */
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const opus_int16 in_Q15[], /* I Input vectors to be quantized [LPC_order] */
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const opus_uint8 pCB_Q8[], /* I Codebook vectors [K*LPC_order] */
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const opus_int K, /* I Number of codebook vectors */
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const opus_int LPC_order /* I Number of LPCs */
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);
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/* Delayed-decision quantizer for NLSF residuals */
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opus_int32 silk_NLSF_del_dec_quant( /* O Returns RD value in Q25 */
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opus_int8 indices[], /* O Quantization indices [ order ] */
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const opus_int16 x_Q10[], /* I Input [ order ] */
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const opus_int16 w_Q5[], /* I Weights [ order ] */
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const opus_uint8 pred_coef_Q8[], /* I Backward predictor coefs [ order ] */
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const opus_int16 ec_ix[], /* I Indices to entropy coding tables [ order ] */
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const opus_uint8 ec_rates_Q5[], /* I Rates [] */
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const opus_int quant_step_size_Q16, /* I Quantization step size */
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const opus_int16 inv_quant_step_size_Q6, /* I Inverse quantization step size */
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const opus_int32 mu_Q20, /* I R/D tradeoff */
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const opus_int16 order /* I Number of input values */
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);
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/* Unpack predictor values and indices for entropy coding tables */
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void silk_NLSF_unpack(
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opus_int16 ec_ix[], /* O Indices to entropy tables [ LPC_ORDER ] */
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opus_uint8 pred_Q8[], /* O LSF predictor [ LPC_ORDER ] */
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const silk_NLSF_CB_struct *psNLSF_CB, /* I Codebook object */
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const opus_int CB1_index /* I Index of vector in first LSF codebook */
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);
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/***********************/
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/* NLSF vector decoder */
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/***********************/
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void silk_NLSF_decode(
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opus_int16 *pNLSF_Q15, /* O Quantized NLSF vector [ LPC_ORDER ] */
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opus_int8 *NLSFIndices, /* I Codebook path vector [ LPC_ORDER + 1 ] */
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const silk_NLSF_CB_struct *psNLSF_CB /* I Codebook object */
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);
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/****************************************************/
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/* Decoder Functions */
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/****************************************************/
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opus_int silk_init_decoder(
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silk_decoder_state *psDec /* I/O Decoder state pointer */
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);
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/* Set decoder sampling rate */
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opus_int silk_decoder_set_fs(
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silk_decoder_state *psDec, /* I/O Decoder state pointer */
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opus_int fs_kHz, /* I Sampling frequency (kHz) */
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opus_int32 fs_API_Hz /* I API Sampling frequency (Hz) */
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);
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/****************/
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/* Decode frame */
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/****************/
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opus_int silk_decode_frame(
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silk_decoder_state *psDec, /* I/O Pointer to Silk decoder state */
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ec_dec *psRangeDec, /* I/O Compressor data structure */
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opus_int16 pOut[], /* O Pointer to output speech frame */
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opus_int32 *pN, /* O Pointer to size of output frame */
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opus_int lostFlag, /* I 0: no loss, 1 loss, 2 decode fec */
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opus_int condCoding /* I The type of conditional coding to use */
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);
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/* Decode indices from bitstream */
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void silk_decode_indices(
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silk_decoder_state *psDec, /* I/O State */
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ec_dec *psRangeDec, /* I/O Compressor data structure */
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opus_int FrameIndex, /* I Frame number */
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opus_int decode_LBRR, /* I Flag indicating LBRR data is being decoded */
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opus_int condCoding /* I The type of conditional coding to use */
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);
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/* Decode parameters from payload */
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void silk_decode_parameters(
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silk_decoder_state *psDec, /* I/O State */
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silk_decoder_control *psDecCtrl, /* I/O Decoder control */
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opus_int condCoding /* I The type of conditional coding to use */
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);
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/* Core decoder. Performs inverse NSQ operation LTP + LPC */
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void silk_decode_core(
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silk_decoder_state *psDec, /* I/O Decoder state */
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silk_decoder_control *psDecCtrl, /* I Decoder control */
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opus_int16 xq[], /* O Decoded speech */
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const opus_int pulses[ MAX_FRAME_LENGTH ] /* I Pulse signal */
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|
);
|
|
|
|
/* Decode quantization indices of excitation (Shell coding) */
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|
void silk_decode_pulses(
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|
ec_dec *psRangeDec, /* I/O Compressor data structure */
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|
opus_int pulses[], /* O Excitation signal */
|
|
const opus_int signalType, /* I Sigtype */
|
|
const opus_int quantOffsetType, /* I quantOffsetType */
|
|
const opus_int frame_length /* I Frame length */
|
|
);
|
|
|
|
/******************/
|
|
/* CNG */
|
|
/******************/
|
|
|
|
/* Reset CNG */
|
|
void silk_CNG_Reset(
|
|
silk_decoder_state *psDec /* I/O Decoder state */
|
|
);
|
|
|
|
/* Updates CNG estimate, and applies the CNG when packet was lost */
|
|
void silk_CNG(
|
|
silk_decoder_state *psDec, /* I/O Decoder state */
|
|
silk_decoder_control *psDecCtrl, /* I/O Decoder control */
|
|
opus_int16 frame[], /* I/O Signal */
|
|
opus_int length /* I Length of residual */
|
|
);
|
|
|
|
/* Encoding of various parameters */
|
|
void silk_encode_indices(
|
|
silk_encoder_state *psEncC, /* I/O Encoder state */
|
|
ec_enc *psRangeEnc, /* I/O Compressor data structure */
|
|
opus_int FrameIndex, /* I Frame number */
|
|
opus_int encode_LBRR, /* I Flag indicating LBRR data is being encoded */
|
|
opus_int condCoding /* I The type of conditional coding to use */
|
|
);
|
|
|
|
#endif
|