| /*********************************************************************** |
| Copyright (c) 2006-2011, Skype Limited. All rights reserved. |
| Redistribution and use in source and binary forms, with or without |
| modification, are permitted provided that the following conditions |
| are met: |
| - Redistributions of source code must retain the above copyright notice, |
| this list of conditions and the following disclaimer. |
| - Redistributions in binary form must reproduce the above copyright |
| notice, this list of conditions and the following disclaimer in the |
| documentation and/or other materials provided with the distribution. |
| - Neither the name of Internet Society, IETF or IETF Trust, nor the |
| names of specific contributors, may be used to endorse or promote |
| products derived from this software without specific prior written |
| permission. |
| THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| POSSIBILITY OF SUCH DAMAGE. |
| ***********************************************************************/ |
| |
| #ifndef SILK_STRUCTS_H |
| #define SILK_STRUCTS_H |
| |
| #include "typedef.h" |
| #include "SigProc_FIX.h" |
| #include "define.h" |
| #include "entenc.h" |
| #include "entdec.h" |
| |
| #ifdef __cplusplus |
| extern "C" |
| { |
| #endif |
| |
| /************************************/ |
| /* Noise shaping quantization state */ |
| /************************************/ |
| typedef struct { |
| opus_int16 xq[ 2 * MAX_FRAME_LENGTH ]; /* Buffer for quantized output signal */ |
| opus_int32 sLTP_shp_Q14[ 2 * MAX_FRAME_LENGTH ]; |
| opus_int32 sLPC_Q14[ MAX_SUB_FRAME_LENGTH + NSQ_LPC_BUF_LENGTH ]; |
| opus_int32 sAR2_Q14[ MAX_SHAPE_LPC_ORDER ]; |
| opus_int32 sLF_AR_shp_Q14; |
| opus_int32 sDiff_shp_Q14; |
| opus_int lagPrev; |
| opus_int sLTP_buf_idx; |
| opus_int sLTP_shp_buf_idx; |
| opus_int32 rand_seed; |
| opus_int32 prev_gain_Q16; |
| opus_int rewhite_flag; |
| } silk_nsq_state; |
| |
| /********************************/ |
| /* VAD state */ |
| /********************************/ |
| typedef struct { |
| opus_int32 AnaState[ 2 ]; /* Analysis filterbank state: 0-8 kHz */ |
| opus_int32 AnaState1[ 2 ]; /* Analysis filterbank state: 0-4 kHz */ |
| opus_int32 AnaState2[ 2 ]; /* Analysis filterbank state: 0-2 kHz */ |
| opus_int32 XnrgSubfr[ VAD_N_BANDS ]; /* Subframe energies */ |
| opus_int32 NrgRatioSmth_Q8[ VAD_N_BANDS ]; /* Smoothed energy level in each band */ |
| opus_int16 HPstate; /* State of differentiator in the lowest band */ |
| opus_int32 NL[ VAD_N_BANDS ]; /* Noise energy level in each band */ |
| opus_int32 inv_NL[ VAD_N_BANDS ]; /* Inverse noise energy level in each band */ |
| opus_int32 NoiseLevelBias[ VAD_N_BANDS ]; /* Noise level estimator bias/offset */ |
| opus_int32 counter; /* Frame counter used in the initial phase */ |
| } silk_VAD_state; |
| |
| /* Variable cut-off low-pass filter state */ |
| typedef struct { |
| opus_int32 In_LP_State[ 2 ]; /* Low pass filter state */ |
| opus_int32 transition_frame_no; /* Counter which is mapped to a cut-off frequency */ |
| opus_int mode; /* Operating mode, <0: switch down, >0: switch up; 0: do nothing */ |
| opus_int32 saved_fs_kHz; /* If non-zero, holds the last sampling rate before a bandwidth switching reset. */ |
| } silk_LP_state; |
| |
| /* Structure containing NLSF codebook */ |
| typedef struct { |
| const opus_int16 nVectors; |
| const opus_int16 order; |
| const opus_int16 quantStepSize_Q16; |
| const opus_int16 invQuantStepSize_Q6; |
| const opus_uint8 *CB1_NLSF_Q8; |
| const opus_int16 *CB1_Wght_Q9; |
| const opus_uint8 *CB1_iCDF; |
| const opus_uint8 *pred_Q8; |
| const opus_uint8 *ec_sel; |
| const opus_uint8 *ec_iCDF; |
| const opus_uint8 *ec_Rates_Q5; |
| const opus_int16 *deltaMin_Q15; |
| } silk_NLSF_CB_struct; |
| |
| typedef struct { |
| opus_int16 pred_prev_Q13[ 2 ]; |
| opus_int16 sMid[ 2 ]; |
| opus_int16 sSide[ 2 ]; |
| opus_int32 mid_side_amp_Q0[ 4 ]; |
| opus_int16 smth_width_Q14; |
| opus_int16 width_prev_Q14; |
| opus_int16 silent_side_len; |
| opus_int8 predIx[ MAX_FRAMES_PER_PACKET ][ 2 ][ 3 ]; |
| opus_int8 mid_only_flags[ MAX_FRAMES_PER_PACKET ]; |
| } stereo_enc_state; |
| |
| typedef struct { |
| opus_int16 pred_prev_Q13[ 2 ]; |
| opus_int16 sMid[ 2 ]; |
| opus_int16 sSide[ 2 ]; |
| } stereo_dec_state; |
| |
| typedef struct { |
| opus_int8 GainsIndices[ MAX_NB_SUBFR ]; |
| opus_int8 LTPIndex[ MAX_NB_SUBFR ]; |
| opus_int8 NLSFIndices[ MAX_LPC_ORDER + 1 ]; |
| opus_int16 lagIndex; |
| opus_int8 contourIndex; |
| opus_int8 signalType; |
| opus_int8 quantOffsetType; |
| opus_int8 NLSFInterpCoef_Q2; |
| opus_int8 PERIndex; |
| opus_int8 LTP_scaleIndex; |
| opus_int8 Seed; |
| } SideInfoIndices; |
| |
| /********************************/ |
| /* Encoder state */ |
| /********************************/ |
| typedef struct { |
| opus_int32 In_HP_State[ 2 ]; /* High pass filter state */ |
| opus_int32 variable_HP_smth1_Q15; /* State of first smoother */ |
| opus_int32 variable_HP_smth2_Q15; /* State of second smoother */ |
| silk_LP_state sLP; /* Low pass filter state */ |
| silk_VAD_state sVAD; /* Voice activity detector state */ |
| silk_nsq_state sNSQ; /* Noise Shape Quantizer State */ |
| opus_int16 prev_NLSFq_Q15[ MAX_LPC_ORDER ]; /* Previously quantized NLSF vector */ |
| opus_int speech_activity_Q8; /* Speech activity */ |
| opus_int allow_bandwidth_switch; /* Flag indicating that switching of internal bandwidth is allowed */ |
| opus_int8 LBRRprevLastGainIndex; |
| opus_int8 prevSignalType; |
| opus_int prevLag; |
| opus_int pitch_LPC_win_length; |
| opus_int max_pitch_lag; /* Highest possible pitch lag (samples) */ |
| opus_int32 API_fs_Hz; /* API sampling frequency (Hz) */ |
| opus_int32 prev_API_fs_Hz; /* Previous API sampling frequency (Hz) */ |
| opus_int maxInternal_fs_Hz; /* Maximum internal sampling frequency (Hz) */ |
| opus_int minInternal_fs_Hz; /* Minimum internal sampling frequency (Hz) */ |
| opus_int desiredInternal_fs_Hz; /* Soft request for internal sampling frequency (Hz) */ |
| opus_int fs_kHz; /* Internal sampling frequency (kHz) */ |
| opus_int nb_subfr; /* Number of 5 ms subframes in a frame */ |
| opus_int frame_length; /* Frame length (samples) */ |
| opus_int subfr_length; /* Subframe length (samples) */ |
| opus_int ltp_mem_length; /* Length of LTP memory */ |
| opus_int la_pitch; /* Look-ahead for pitch analysis (samples) */ |
| opus_int la_shape; /* Look-ahead for noise shape analysis (samples) */ |
| opus_int shapeWinLength; /* Window length for noise shape analysis (samples) */ |
| opus_int32 TargetRate_bps; /* Target bitrate (bps) */ |
| opus_int PacketSize_ms; /* Number of milliseconds to put in each packet */ |
| opus_int PacketLoss_perc; /* Packet loss rate measured by farend */ |
| opus_int32 frameCounter; |
| opus_int Complexity; /* Complexity setting */ |
| opus_int nStatesDelayedDecision; /* Number of states in delayed decision quantization */ |
| opus_int useInterpolatedNLSFs; /* Flag for using NLSF interpolation */ |
| opus_int shapingLPCOrder; /* Filter order for noise shaping filters */ |
| opus_int predictLPCOrder; /* Filter order for prediction filters */ |
| opus_int pitchEstimationComplexity; /* Complexity level for pitch estimator */ |
| opus_int pitchEstimationLPCOrder; /* Whitening filter order for pitch estimator */ |
| opus_int32 pitchEstimationThreshold_Q16; /* Threshold for pitch estimator */ |
| opus_int32 sum_log_gain_Q7; /* Cumulative max prediction gain */ |
| opus_int NLSF_MSVQ_Survivors; /* Number of survivors in NLSF MSVQ */ |
| opus_int first_frame_after_reset; /* Flag for deactivating NLSF interpolation, pitch prediction */ |
| opus_int controlled_since_last_payload; /* Flag for ensuring codec_control only runs once per packet */ |
| opus_int warping_Q16; /* Warping parameter for warped noise shaping */ |
| opus_int useCBR; /* Flag to enable constant bitrate */ |
| opus_int prefillFlag; /* Flag to indicate that only buffers are prefilled, no coding */ |
| const opus_uint8 *pitch_lag_low_bits_iCDF; /* Pointer to iCDF table for low bits of pitch lag index */ |
| const opus_uint8 *pitch_contour_iCDF; /* Pointer to iCDF table for pitch contour index */ |
| const silk_NLSF_CB_struct *psNLSF_CB; /* Pointer to NLSF codebook */ |
| opus_int input_quality_bands_Q15[ VAD_N_BANDS ]; |
| opus_int input_tilt_Q15; |
| opus_int SNR_dB_Q7; /* Quality setting */ |
| |
| opus_int8 VAD_flags[ MAX_FRAMES_PER_PACKET ]; |
| opus_int8 LBRR_flag; |
| opus_int LBRR_flags[ MAX_FRAMES_PER_PACKET ]; |
| |
| SideInfoIndices indices; |
| opus_int8 pulses[ MAX_FRAME_LENGTH ]; |
| |
| int arch; |
| |
| /* Input/output buffering */ |
| opus_int16 inputBuf[ MAX_FRAME_LENGTH + 2 ]; /* Buffer containing input signal */ |
| opus_int inputBufIx; |
| opus_int nFramesPerPacket; |
| opus_int nFramesEncoded; /* Number of frames analyzed in current packet */ |
| |
| opus_int nChannelsAPI; |
| opus_int nChannelsInternal; |
| opus_int channelNb; |
| |
| /* Parameters For LTP scaling Control */ |
| opus_int frames_since_onset; |
| |
| /* Specifically for entropy coding */ |
| opus_int ec_prevSignalType; |
| opus_int16 ec_prevLagIndex; |
| |
| silk_resampler_state_struct resampler_state; |
| |
| /* DTX */ |
| opus_int useDTX; /* Flag to enable DTX */ |
| opus_int inDTX; /* Flag to signal DTX period */ |
| opus_int noSpeechCounter; /* Counts concecutive nonactive frames, used by DTX */ |
| |
| /* Inband Low Bitrate Redundancy (LBRR) data */ |
| opus_int useInBandFEC; /* Saves the API setting for query */ |
| opus_int LBRR_enabled; /* Depends on useInBandFRC, bitrate and packet loss rate */ |
| opus_int LBRR_GainIncreases; /* Gains increment for coding LBRR frames */ |
| SideInfoIndices indices_LBRR[ MAX_FRAMES_PER_PACKET ]; |
| opus_int8 pulses_LBRR[ MAX_FRAMES_PER_PACKET ][ MAX_FRAME_LENGTH ]; |
| } silk_encoder_state; |
| |
| |
| /* Struct for Packet Loss Concealment */ |
| typedef struct { |
| opus_int32 pitchL_Q8; /* Pitch lag to use for voiced concealment */ |
| opus_int16 LTPCoef_Q14[ LTP_ORDER ]; /* LTP coeficients to use for voiced concealment */ |
| opus_int16 prevLPC_Q12[ MAX_LPC_ORDER ]; |
| opus_int last_frame_lost; /* Was previous frame lost */ |
| opus_int32 rand_seed; /* Seed for unvoiced signal generation */ |
| opus_int16 randScale_Q14; /* Scaling of unvoiced random signal */ |
| opus_int32 conc_energy; |
| opus_int conc_energy_shift; |
| opus_int16 prevLTP_scale_Q14; |
| opus_int32 prevGain_Q16[ 2 ]; |
| opus_int fs_kHz; |
| opus_int nb_subfr; |
| opus_int subfr_length; |
| } silk_PLC_struct; |
| |
| /* Struct for CNG */ |
| typedef struct { |
| opus_int32 CNG_exc_buf_Q14[ MAX_FRAME_LENGTH ]; |
| opus_int16 CNG_smth_NLSF_Q15[ MAX_LPC_ORDER ]; |
| opus_int32 CNG_synth_state[ MAX_LPC_ORDER ]; |
| opus_int32 CNG_smth_Gain_Q16; |
| opus_int32 rand_seed; |
| opus_int fs_kHz; |
| } silk_CNG_struct; |
| |
| /********************************/ |
| /* Decoder state */ |
| /********************************/ |
| typedef struct { |
| opus_int32 prev_gain_Q16; |
| opus_int32 exc_Q14[ MAX_FRAME_LENGTH ]; |
| opus_int32 sLPC_Q14_buf[ MAX_LPC_ORDER ]; |
| opus_int16 outBuf[ MAX_FRAME_LENGTH + 2 * MAX_SUB_FRAME_LENGTH ]; /* Buffer for output signal */ |
| opus_int lagPrev; /* Previous Lag */ |
| opus_int8 LastGainIndex; /* Previous gain index */ |
| opus_int fs_kHz; /* Sampling frequency in kHz */ |
| opus_int32 fs_API_hz; /* API sample frequency (Hz) */ |
| opus_int nb_subfr; /* Number of 5 ms subframes in a frame */ |
| opus_int frame_length; /* Frame length (samples) */ |
| opus_int subfr_length; /* Subframe length (samples) */ |
| opus_int ltp_mem_length; /* Length of LTP memory */ |
| opus_int LPC_order; /* LPC order */ |
| opus_int16 prevNLSF_Q15[ MAX_LPC_ORDER ]; /* Used to interpolate LSFs */ |
| opus_int first_frame_after_reset; /* Flag for deactivating NLSF interpolation */ |
| const opus_uint8 *pitch_lag_low_bits_iCDF; /* Pointer to iCDF table for low bits of pitch lag index */ |
| const opus_uint8 *pitch_contour_iCDF; /* Pointer to iCDF table for pitch contour index */ |
| |
| /* For buffering payload in case of more frames per packet */ |
| opus_int nFramesDecoded; |
| opus_int nFramesPerPacket; |
| |
| /* Specifically for entropy coding */ |
| opus_int ec_prevSignalType; |
| opus_int16 ec_prevLagIndex; |
| |
| opus_int VAD_flags[ MAX_FRAMES_PER_PACKET ]; |
| opus_int LBRR_flag; |
| opus_int LBRR_flags[ MAX_FRAMES_PER_PACKET ]; |
| |
| silk_resampler_state_struct resampler_state; |
| |
| const silk_NLSF_CB_struct *psNLSF_CB; /* Pointer to NLSF codebook */ |
| |
| /* Quantization indices */ |
| SideInfoIndices indices; |
| |
| /* CNG state */ |
| silk_CNG_struct sCNG; |
| |
| /* Stuff used for PLC */ |
| opus_int lossCnt; |
| opus_int prevSignalType; |
| int arch; |
| |
| silk_PLC_struct sPLC; |
| |
| } silk_decoder_state; |
| |
| /************************/ |
| /* Decoder control */ |
| /************************/ |
| typedef struct { |
| /* Prediction and coding parameters */ |
| opus_int pitchL[ MAX_NB_SUBFR ]; |
| opus_int32 Gains_Q16[ MAX_NB_SUBFR ]; |
| /* Holds interpolated and final coefficients, 4-byte aligned */ |
| silk_DWORD_ALIGN opus_int16 PredCoef_Q12[ 2 ][ MAX_LPC_ORDER ]; |
| opus_int16 LTPCoef_Q14[ LTP_ORDER * MAX_NB_SUBFR ]; |
| opus_int LTP_scale_Q14; |
| } silk_decoder_control; |
| |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif |
