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Chris@69: THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" Chris@69: AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE Chris@69: IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE Chris@69: ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE Chris@69: LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR Chris@69: CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF Chris@69: SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS Chris@69: INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN Chris@69: CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) Chris@69: ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE Chris@69: POSSIBILITY OF SUCH DAMAGE. Chris@69: ***********************************************************************/ Chris@69: Chris@69: #ifndef SILK_MAIN_FLP_H Chris@69: #define SILK_MAIN_FLP_H Chris@69: Chris@69: #include "SigProc_FLP.h" Chris@69: #include "SigProc_FIX.h" Chris@69: #include "structs_FLP.h" Chris@69: #include "main.h" Chris@69: #include "define.h" Chris@69: #include "debug.h" Chris@69: #include "entenc.h" Chris@69: Chris@69: #ifdef __cplusplus Chris@69: extern "C" Chris@69: { Chris@69: #endif Chris@69: Chris@69: #define silk_encoder_state_Fxx silk_encoder_state_FLP Chris@69: #define silk_encode_do_VAD_Fxx silk_encode_do_VAD_FLP Chris@69: #define silk_encode_frame_Fxx silk_encode_frame_FLP Chris@69: Chris@69: /*********************/ Chris@69: /* Encoder Functions */ Chris@69: /*********************/ Chris@69: Chris@69: /* High-pass filter with cutoff frequency adaptation based on pitch lag statistics */ Chris@69: void silk_HP_variable_cutoff( Chris@69: silk_encoder_state_Fxx state_Fxx[] /* I/O Encoder states */ Chris@69: ); Chris@69: Chris@69: /* Encoder main function */ Chris@69: void silk_encode_do_VAD_FLP( Chris@69: silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */ Chris@69: opus_int activity /* I Decision of Opus voice activity detector */ Chris@69: ); Chris@69: Chris@69: /* Encoder main function */ Chris@69: opus_int silk_encode_frame_FLP( Chris@69: silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */ Chris@69: opus_int32 *pnBytesOut, /* O Number of payload bytes; */ Chris@69: ec_enc *psRangeEnc, /* I/O compressor data structure */ Chris@69: opus_int condCoding, /* I The type of conditional coding to use */ Chris@69: opus_int maxBits, /* I If > 0: maximum number of output bits */ Chris@69: opus_int useCBR /* I Flag to force constant-bitrate operation */ Chris@69: ); Chris@69: Chris@69: /* Initializes the Silk encoder state */ Chris@69: opus_int silk_init_encoder( Chris@69: silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */ Chris@69: int arch /* I Run-tim architecture */ Chris@69: ); Chris@69: Chris@69: /* Control the Silk encoder */ Chris@69: opus_int silk_control_encoder( Chris@69: silk_encoder_state_FLP *psEnc, /* I/O Pointer to Silk encoder state FLP */ Chris@69: silk_EncControlStruct *encControl, /* I Control structure */ Chris@69: const opus_int allow_bw_switch, /* I Flag to allow switching audio bandwidth */ Chris@69: const opus_int channelNb, /* I Channel number */ Chris@69: const opus_int force_fs_kHz Chris@69: ); Chris@69: Chris@69: /**************************/ Chris@69: /* Noise shaping analysis */ Chris@69: /**************************/ Chris@69: /* Compute noise shaping coefficients and initial gain values */ Chris@69: void silk_noise_shape_analysis_FLP( Chris@69: silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */ Chris@69: silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */ Chris@69: const silk_float *pitch_res, /* I LPC residual from pitch analysis */ Chris@69: const silk_float *x /* I Input signal [frame_length + la_shape] */ Chris@69: ); Chris@69: Chris@69: /* Autocorrelations for a warped frequency axis */ Chris@69: void silk_warped_autocorrelation_FLP( Chris@69: silk_float *corr, /* O Result [order + 1] */ Chris@69: const silk_float *input, /* I Input data to correlate */ Chris@69: const silk_float warping, /* I Warping coefficient */ Chris@69: const opus_int length, /* I Length of input */ Chris@69: const opus_int order /* I Correlation order (even) */ Chris@69: ); Chris@69: Chris@69: /* Calculation of LTP state scaling */ Chris@69: void silk_LTP_scale_ctrl_FLP( Chris@69: silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */ Chris@69: silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */ Chris@69: opus_int condCoding /* I The type of conditional coding to use */ Chris@69: ); Chris@69: Chris@69: /**********************************************/ Chris@69: /* Prediction Analysis */ Chris@69: /**********************************************/ Chris@69: /* Find pitch lags */ Chris@69: void silk_find_pitch_lags_FLP( Chris@69: silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */ Chris@69: silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */ Chris@69: silk_float res[], /* O Residual */ Chris@69: const silk_float x[], /* I Speech signal */ Chris@69: int arch /* I Run-time architecture */ Chris@69: ); Chris@69: Chris@69: /* Find LPC and LTP coefficients */ Chris@69: void silk_find_pred_coefs_FLP( Chris@69: silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */ Chris@69: silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */ Chris@69: const silk_float res_pitch[], /* I Residual from pitch analysis */ Chris@69: const silk_float x[], /* I Speech signal */ Chris@69: opus_int condCoding /* I The type of conditional coding to use */ Chris@69: ); Chris@69: Chris@69: /* LPC analysis */ Chris@69: void silk_find_LPC_FLP( Chris@69: silk_encoder_state *psEncC, /* I/O Encoder state */ Chris@69: opus_int16 NLSF_Q15[], /* O NLSFs */ Chris@69: const silk_float x[], /* I Input signal */ Chris@69: const silk_float minInvGain /* I Prediction gain from LTP (dB) */ Chris@69: ); Chris@69: Chris@69: /* LTP analysis */ Chris@69: void silk_find_LTP_FLP( Chris@69: silk_float XX[ MAX_NB_SUBFR * LTP_ORDER * LTP_ORDER ], /* O Weight for LTP quantization */ Chris@69: silk_float xX[ MAX_NB_SUBFR * LTP_ORDER ], /* O Weight for LTP quantization */ Chris@69: const silk_float r_ptr[], /* I LPC residual */ Chris@69: const opus_int lag[ MAX_NB_SUBFR ], /* I LTP lags */ Chris@69: const opus_int subfr_length, /* I Subframe length */ Chris@69: const opus_int nb_subfr /* I number of subframes */ Chris@69: ); Chris@69: Chris@69: void silk_LTP_analysis_filter_FLP( Chris@69: silk_float *LTP_res, /* O LTP res MAX_NB_SUBFR*(pre_lgth+subfr_lngth) */ Chris@69: const silk_float *x, /* I Input signal, with preceding samples */ Chris@69: const silk_float B[ LTP_ORDER * MAX_NB_SUBFR ], /* I LTP coefficients for each subframe */ Chris@69: const opus_int pitchL[ MAX_NB_SUBFR ], /* I Pitch lags */ Chris@69: const silk_float invGains[ MAX_NB_SUBFR ], /* I Inverse quantization gains */ Chris@69: const opus_int subfr_length, /* I Length of each subframe */ Chris@69: const opus_int nb_subfr, /* I number of subframes */ Chris@69: const opus_int pre_length /* I Preceding samples for each subframe */ Chris@69: ); Chris@69: Chris@69: /* Calculates residual energies of input subframes where all subframes have LPC_order */ Chris@69: /* of preceding samples */ Chris@69: void silk_residual_energy_FLP( Chris@69: silk_float nrgs[ MAX_NB_SUBFR ], /* O Residual energy per subframe */ Chris@69: const silk_float x[], /* I Input signal */ Chris@69: silk_float a[ 2 ][ MAX_LPC_ORDER ], /* I AR coefs for each frame half */ Chris@69: const silk_float gains[], /* I Quantization gains */ Chris@69: const opus_int subfr_length, /* I Subframe length */ Chris@69: const opus_int nb_subfr, /* I number of subframes */ Chris@69: const opus_int LPC_order /* I LPC order */ Chris@69: ); Chris@69: Chris@69: /* 16th order LPC analysis filter */ Chris@69: void silk_LPC_analysis_filter_FLP( Chris@69: silk_float r_LPC[], /* O LPC residual signal */ Chris@69: const silk_float PredCoef[], /* I LPC coefficients */ Chris@69: const silk_float s[], /* I Input signal */ Chris@69: const opus_int length, /* I Length of input signal */ Chris@69: const opus_int Order /* I LPC order */ Chris@69: ); Chris@69: Chris@69: /* LTP tap quantizer */ Chris@69: void silk_quant_LTP_gains_FLP( Chris@69: silk_float B[ MAX_NB_SUBFR * LTP_ORDER ], /* O Quantized LTP gains */ Chris@69: opus_int8 cbk_index[ MAX_NB_SUBFR ], /* O Codebook index */ Chris@69: opus_int8 *periodicity_index, /* O Periodicity index */ Chris@69: opus_int32 *sum_log_gain_Q7, /* I/O Cumulative max prediction gain */ Chris@69: silk_float *pred_gain_dB, /* O LTP prediction gain */ Chris@69: const silk_float XX[ MAX_NB_SUBFR * LTP_ORDER * LTP_ORDER ], /* I Correlation matrix */ Chris@69: const silk_float xX[ MAX_NB_SUBFR * LTP_ORDER ], /* I Correlation vector */ Chris@69: const opus_int subfr_len, /* I Number of samples per subframe */ Chris@69: const opus_int nb_subfr, /* I Number of subframes */ Chris@69: int arch /* I Run-time architecture */ Chris@69: ); Chris@69: Chris@69: /* Residual energy: nrg = wxx - 2 * wXx * c + c' * wXX * c */ Chris@69: silk_float silk_residual_energy_covar_FLP( /* O Weighted residual energy */ Chris@69: const silk_float *c, /* I Filter coefficients */ Chris@69: silk_float *wXX, /* I/O Weighted correlation matrix, reg. out */ Chris@69: const silk_float *wXx, /* I Weighted correlation vector */ Chris@69: const silk_float wxx, /* I Weighted correlation value */ Chris@69: const opus_int D /* I Dimension */ Chris@69: ); Chris@69: Chris@69: /* Processing of gains */ Chris@69: void silk_process_gains_FLP( Chris@69: silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */ Chris@69: silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */ Chris@69: opus_int condCoding /* I The type of conditional coding to use */ Chris@69: ); Chris@69: Chris@69: /******************/ Chris@69: /* Linear Algebra */ Chris@69: /******************/ Chris@69: /* Calculates correlation matrix X'*X */ Chris@69: void silk_corrMatrix_FLP( Chris@69: const silk_float *x, /* I x vector [ L+order-1 ] used to create X */ Chris@69: const opus_int L, /* I Length of vectors */ Chris@69: const opus_int Order, /* I Max lag for correlation */ Chris@69: silk_float *XX /* O X'*X correlation matrix [order x order] */ Chris@69: ); Chris@69: Chris@69: /* Calculates correlation vector X'*t */ Chris@69: void silk_corrVector_FLP( Chris@69: const silk_float *x, /* I x vector [L+order-1] used to create X */ Chris@69: const silk_float *t, /* I Target vector [L] */ Chris@69: const opus_int L, /* I Length of vecors */ Chris@69: const opus_int Order, /* I Max lag for correlation */ Chris@69: silk_float *Xt /* O X'*t correlation vector [order] */ Chris@69: ); Chris@69: Chris@69: /* Apply sine window to signal vector. */ Chris@69: /* Window types: */ Chris@69: /* 1 -> sine window from 0 to pi/2 */ Chris@69: /* 2 -> sine window from pi/2 to pi */ Chris@69: void silk_apply_sine_window_FLP( Chris@69: silk_float px_win[], /* O Pointer to windowed signal */ Chris@69: const silk_float px[], /* I Pointer to input signal */ Chris@69: const opus_int win_type, /* I Selects a window type */ Chris@69: const opus_int length /* I Window length, multiple of 4 */ Chris@69: ); Chris@69: Chris@69: /* Wrapper functions. Call flp / fix code */ Chris@69: Chris@69: /* Convert AR filter coefficients to NLSF parameters */ Chris@69: void silk_A2NLSF_FLP( Chris@69: opus_int16 *NLSF_Q15, /* O NLSF vector [ LPC_order ] */ Chris@69: const silk_float *pAR, /* I LPC coefficients [ LPC_order ] */ Chris@69: const opus_int LPC_order /* I LPC order */ Chris@69: ); Chris@69: Chris@69: /* Convert NLSF parameters to AR prediction filter coefficients */ Chris@69: void silk_NLSF2A_FLP( Chris@69: silk_float *pAR, /* O LPC coefficients [ LPC_order ] */ Chris@69: const opus_int16 *NLSF_Q15, /* I NLSF vector [ LPC_order ] */ Chris@69: const opus_int LPC_order, /* I LPC order */ Chris@69: int arch /* I Run-time architecture */ Chris@69: ); Chris@69: Chris@69: /* Limit, stabilize, and quantize NLSFs */ Chris@69: void silk_process_NLSFs_FLP( Chris@69: silk_encoder_state *psEncC, /* I/O Encoder state */ Chris@69: silk_float PredCoef[ 2 ][ MAX_LPC_ORDER ], /* O Prediction coefficients */ Chris@69: opus_int16 NLSF_Q15[ MAX_LPC_ORDER ], /* I/O Normalized LSFs (quant out) (0 - (2^15-1)) */ Chris@69: const opus_int16 prev_NLSF_Q15[ MAX_LPC_ORDER ] /* I Previous Normalized LSFs (0 - (2^15-1)) */ Chris@69: ); Chris@69: Chris@69: /* Floating-point Silk NSQ wrapper */ Chris@69: void silk_NSQ_wrapper_FLP( Chris@69: silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */ Chris@69: silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */ Chris@69: SideInfoIndices *psIndices, /* I/O Quantization indices */ Chris@69: silk_nsq_state *psNSQ, /* I/O Noise Shaping Quantzation state */ Chris@69: opus_int8 pulses[], /* O Quantized pulse signal */ Chris@69: const silk_float x[] /* I Prefiltered input signal */ Chris@69: ); Chris@69: Chris@69: #ifdef __cplusplus Chris@69: } Chris@69: #endif Chris@69: Chris@69: #endif