1 /*********************************************************************** 2 Copyright (c) 2006-2011, Skype Limited. All rights reserved. 3 Redistribution and use in source and binary forms, with or without 4 modification, are permitted provided that the following conditions 5 are met: 6 - Redistributions of source code must retain the above copyright notice, 7 this list of conditions and the following disclaimer. 8 - Redistributions in binary form must reproduce the above copyright 9 notice, this list of conditions and the following disclaimer in the 10 documentation and/or other materials provided with the distribution. 11 - Neither the name of Internet Society, IETF or IETF Trust, nor the 12 names of specific contributors, may be used to endorse or promote 13 products derived from this software without specific prior written 14 permission. 15 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS AS IS 16 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 19 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 20 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 21 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 22 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 23 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 24 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 25 POSSIBILITY OF SUCH DAMAGE. 26 ***********************************************************************/ 27 28 #ifndef SILK_STRUCTS_H 29 #define SILK_STRUCTS_H 30 31 #include "typedef.h" 32 #include "SigProc_FIX.h" 33 #include "define.h" 34 #include "entenc.h" 35 #include "entdec.h" 36 37 #ifdef __cplusplus 38 extern "C" 39 { 40 #endif 41 42 /************************************/ 43 /* Noise shaping quantization state */ 44 /************************************/ 45 typedef struct { 46 opus_int16 xq[ 2 * MAX_FRAME_LENGTH ]; /* Buffer for quantized output signal */ 47 opus_int32 sLTP_shp_Q14[ 2 * MAX_FRAME_LENGTH ]; 48 opus_int32 sLPC_Q14[ MAX_SUB_FRAME_LENGTH + NSQ_LPC_BUF_LENGTH ]; 49 opus_int32 sAR2_Q14[ MAX_SHAPE_LPC_ORDER ]; 50 opus_int32 sLF_AR_shp_Q14; 51 opus_int lagPrev; 52 opus_int sLTP_buf_idx; 53 opus_int sLTP_shp_buf_idx; 54 opus_int32 rand_seed; 55 opus_int32 prev_gain_Q16; 56 opus_int rewhite_flag; 57 } silk_nsq_state; 58 59 /********************************/ 60 /* VAD state */ 61 /********************************/ 62 typedef struct { 63 opus_int32 AnaState[ 2 ]; /* Analysis filterbank state: 0-8 kHz */ 64 opus_int32 AnaState1[ 2 ]; /* Analysis filterbank state: 0-4 kHz */ 65 opus_int32 AnaState2[ 2 ]; /* Analysis filterbank state: 0-2 kHz */ 66 opus_int32 XnrgSubfr[ VAD_N_BANDS ]; /* Subframe energies */ 67 opus_int32 NrgRatioSmth_Q8[ VAD_N_BANDS ]; /* Smoothed energy level in each band */ 68 opus_int16 HPstate; /* State of differentiator in the lowest band */ 69 opus_int32 NL[ VAD_N_BANDS ]; /* Noise energy level in each band */ 70 opus_int32 inv_NL[ VAD_N_BANDS ]; /* Inverse noise energy level in each band */ 71 opus_int32 NoiseLevelBias[ VAD_N_BANDS ]; /* Noise level estimator bias/offset */ 72 opus_int32 counter; /* Frame counter used in the initial phase */ 73 } silk_VAD_state; 74 75 /* Variable cut-off low-pass filter state */ 76 typedef struct { 77 opus_int32 In_LP_State[ 2 ]; /* Low pass filter state */ 78 opus_int32 transition_frame_no; /* Counter which is mapped to a cut-off frequency */ 79 opus_int mode; /* Operating mode, <0: switch down, >0: switch up; 0: do nothing */ 80 } silk_LP_state; 81 82 /* Structure containing NLSF codebook */ 83 typedef struct { 84 const opus_int16 nVectors; 85 const opus_int16 order; 86 const opus_int16 quantStepSize_Q16; 87 const opus_int16 invQuantStepSize_Q6; 88 const opus_uint8 *CB1_NLSF_Q8; 89 const opus_uint8 *CB1_iCDF; 90 const opus_uint8 *pred_Q8; 91 const opus_uint8 *ec_sel; 92 const opus_uint8 *ec_iCDF; 93 const opus_uint8 *ec_Rates_Q5; 94 const opus_int16 *deltaMin_Q15; 95 } silk_NLSF_CB_struct; 96 97 typedef struct { 98 opus_int16 pred_prev_Q13[ 2 ]; 99 opus_int16 sMid[ 2 ]; 100 opus_int16 sSide[ 2 ]; 101 opus_int32 mid_side_amp_Q0[ 4 ]; 102 opus_int16 smth_width_Q14; 103 opus_int16 width_prev_Q14; 104 opus_int16 silent_side_len; 105 opus_int8 predIx[ MAX_FRAMES_PER_PACKET ][ 2 ][ 3 ]; 106 opus_int8 mid_only_flags[ MAX_FRAMES_PER_PACKET ]; 107 } stereo_enc_state; 108 109 typedef struct { 110 opus_int16 pred_prev_Q13[ 2 ]; 111 opus_int16 sMid[ 2 ]; 112 opus_int16 sSide[ 2 ]; 113 } stereo_dec_state; 114 115 typedef struct { 116 opus_int8 GainsIndices[ MAX_NB_SUBFR ]; 117 opus_int8 LTPIndex[ MAX_NB_SUBFR ]; 118 opus_int8 NLSFIndices[ MAX_LPC_ORDER + 1 ]; 119 opus_int16 lagIndex; 120 opus_int8 contourIndex; 121 opus_int8 signalType; 122 opus_int8 quantOffsetType; 123 opus_int8 NLSFInterpCoef_Q2; 124 opus_int8 PERIndex; 125 opus_int8 LTP_scaleIndex; 126 opus_int8 Seed; 127 } SideInfoIndices; 128 129 /********************************/ 130 /* Encoder state */ 131 /********************************/ 132 typedef struct { 133 opus_int32 In_HP_State[ 2 ]; /* High pass filter state */ 134 opus_int32 variable_HP_smth1_Q15; /* State of first smoother */ 135 opus_int32 variable_HP_smth2_Q15; /* State of second smoother */ 136 silk_LP_state sLP; /* Low pass filter state */ 137 silk_VAD_state sVAD; /* Voice activity detector state */ 138 silk_nsq_state sNSQ; /* Noise Shape Quantizer State */ 139 opus_int16 prev_NLSFq_Q15[ MAX_LPC_ORDER ]; /* Previously quantized NLSF vector */ 140 opus_int speech_activity_Q8; /* Speech activity */ 141 opus_int allow_bandwidth_switch; /* Flag indicating that switching of internal bandwidth is allowed */ 142 opus_int8 LBRRprevLastGainIndex; 143 opus_int8 prevSignalType; 144 opus_int prevLag; 145 opus_int pitch_LPC_win_length; 146 opus_int max_pitch_lag; /* Highest possible pitch lag (samples) */ 147 opus_int32 API_fs_Hz; /* API sampling frequency (Hz) */ 148 opus_int32 prev_API_fs_Hz; /* Previous API sampling frequency (Hz) */ 149 opus_int maxInternal_fs_Hz; /* Maximum internal sampling frequency (Hz) */ 150 opus_int minInternal_fs_Hz; /* Minimum internal sampling frequency (Hz) */ 151 opus_int desiredInternal_fs_Hz; /* Soft request for internal sampling frequency (Hz) */ 152 opus_int fs_kHz; /* Internal sampling frequency (kHz) */ 153 opus_int nb_subfr; /* Number of 5 ms subframes in a frame */ 154 opus_int frame_length; /* Frame length (samples) */ 155 opus_int subfr_length; /* Subframe length (samples) */ 156 opus_int ltp_mem_length; /* Length of LTP memory */ 157 opus_int la_pitch; /* Look-ahead for pitch analysis (samples) */ 158 opus_int la_shape; /* Look-ahead for noise shape analysis (samples) */ 159 opus_int shapeWinLength; /* Window length for noise shape analysis (samples) */ 160 opus_int32 TargetRate_bps; /* Target bitrate (bps) */ 161 opus_int PacketSize_ms; /* Number of milliseconds to put in each packet */ 162 opus_int PacketLoss_perc; /* Packet loss rate measured by farend */ 163 opus_int32 frameCounter; 164 opus_int Complexity; /* Complexity setting */ 165 opus_int nStatesDelayedDecision; /* Number of states in delayed decision quantization */ 166 opus_int useInterpolatedNLSFs; /* Flag for using NLSF interpolation */ 167 opus_int shapingLPCOrder; /* Filter order for noise shaping filters */ 168 opus_int predictLPCOrder; /* Filter order for prediction filters */ 169 opus_int pitchEstimationComplexity; /* Complexity level for pitch estimator */ 170 opus_int pitchEstimationLPCOrder; /* Whitening filter order for pitch estimator */ 171 opus_int32 pitchEstimationThreshold_Q16; /* Threshold for pitch estimator */ 172 opus_int LTPQuantLowComplexity; /* Flag for low complexity LTP quantization */ 173 opus_int mu_LTP_Q9; /* Rate-distortion tradeoff in LTP quantization */ 174 opus_int NLSF_MSVQ_Survivors; /* Number of survivors in NLSF MSVQ */ 175 opus_int first_frame_after_reset; /* Flag for deactivating NLSF interpolation, pitch prediction */ 176 opus_int controlled_since_last_payload; /* Flag for ensuring codec_control only runs once per packet */ 177 opus_int warping_Q16; /* Warping parameter for warped noise shaping */ 178 opus_int useCBR; /* Flag to enable constant bitrate */ 179 opus_int prefillFlag; /* Flag to indicate that only buffers are prefilled, no coding */ 180 const opus_uint8 *pitch_lag_low_bits_iCDF; /* Pointer to iCDF table for low bits of pitch lag index */ 181 const opus_uint8 *pitch_contour_iCDF; /* Pointer to iCDF table for pitch contour index */ 182 const silk_NLSF_CB_struct *psNLSF_CB; /* Pointer to NLSF codebook */ 183 opus_int input_quality_bands_Q15[ VAD_N_BANDS ]; 184 opus_int input_tilt_Q15; 185 opus_int SNR_dB_Q7; /* Quality setting */ 186 187 opus_int8 VAD_flags[ MAX_FRAMES_PER_PACKET ]; 188 opus_int8 LBRR_flag; 189 opus_int LBRR_flags[ MAX_FRAMES_PER_PACKET ]; 190 191 SideInfoIndices indices; 192 opus_int8 pulses[ MAX_FRAME_LENGTH ]; 193 194 /* Input/output buffering */ 195 opus_int16 inputBuf[ MAX_FRAME_LENGTH + 2 ]; /* Buffer containing input signal */ 196 opus_int inputBufIx; 197 opus_int nFramesPerPacket; 198 opus_int nFramesEncoded; /* Number of frames analyzed in current packet */ 199 200 opus_int nChannelsAPI; 201 opus_int nChannelsInternal; 202 opus_int channelNb; 203 204 /* Parameters For LTP scaling Control */ 205 opus_int frames_since_onset; 206 207 /* Specifically for entropy coding */ 208 opus_int ec_prevSignalType; 209 opus_int16 ec_prevLagIndex; 210 211 silk_resampler_state_struct resampler_state; 212 213 /* DTX */ 214 opus_int useDTX; /* Flag to enable DTX */ 215 opus_int inDTX; /* Flag to signal DTX period */ 216 opus_int noSpeechCounter; /* Counts concecutive nonactive frames, used by DTX */ 217 218 /* Inband Low Bitrate Redundancy (LBRR) data */ 219 opus_int useInBandFEC; /* Saves the API setting for query */ 220 opus_int LBRR_enabled; /* Depends on useInBandFRC, bitrate and packet loss rate */ 221 opus_int LBRR_GainIncreases; /* Gains increment for coding LBRR frames */ 222 SideInfoIndices indices_LBRR[ MAX_FRAMES_PER_PACKET ]; 223 opus_int8 pulses_LBRR[ MAX_FRAMES_PER_PACKET ][ MAX_FRAME_LENGTH ]; 224 } silk_encoder_state; 225 226 227 /* Struct for Packet Loss Concealment */ 228 typedef struct { 229 opus_int32 pitchL_Q8; /* Pitch lag to use for voiced concealment */ 230 opus_int16 LTPCoef_Q14[ LTP_ORDER ]; /* LTP coeficients to use for voiced concealment */ 231 opus_int16 prevLPC_Q12[ MAX_LPC_ORDER ]; 232 opus_int last_frame_lost; /* Was previous frame lost */ 233 opus_int32 rand_seed; /* Seed for unvoiced signal generation */ 234 opus_int16 randScale_Q14; /* Scaling of unvoiced random signal */ 235 opus_int32 conc_energy; 236 opus_int conc_energy_shift; 237 opus_int16 prevLTP_scale_Q14; 238 opus_int32 prevGain_Q16[ 2 ]; 239 opus_int fs_kHz; 240 opus_int nb_subfr; 241 opus_int subfr_length; 242 } silk_PLC_struct; 243 244 /* Struct for CNG */ 245 typedef struct { 246 opus_int32 CNG_exc_buf_Q14[ MAX_FRAME_LENGTH ]; 247 opus_int16 CNG_smth_NLSF_Q15[ MAX_LPC_ORDER ]; 248 opus_int32 CNG_synth_state[ MAX_LPC_ORDER ]; 249 opus_int32 CNG_smth_Gain_Q16; 250 opus_int32 rand_seed; 251 opus_int fs_kHz; 252 } silk_CNG_struct; 253 254 /********************************/ 255 /* Decoder state */ 256 /********************************/ 257 typedef struct { 258 opus_int32 prev_gain_Q16; 259 opus_int32 exc_Q14[ MAX_FRAME_LENGTH ]; 260 opus_int32 sLPC_Q14_buf[ MAX_LPC_ORDER ]; 261 opus_int16 outBuf[ MAX_FRAME_LENGTH + 2 * MAX_SUB_FRAME_LENGTH ]; /* Buffer for output signal */ 262 opus_int lagPrev; /* Previous Lag */ 263 opus_int8 LastGainIndex; /* Previous gain index */ 264 opus_int fs_kHz; /* Sampling frequency in kHz */ 265 opus_int32 fs_API_hz; /* API sample frequency (Hz) */ 266 opus_int nb_subfr; /* Number of 5 ms subframes in a frame */ 267 opus_int frame_length; /* Frame length (samples) */ 268 opus_int subfr_length; /* Subframe length (samples) */ 269 opus_int ltp_mem_length; /* Length of LTP memory */ 270 opus_int LPC_order; /* LPC order */ 271 opus_int16 prevNLSF_Q15[ MAX_LPC_ORDER ]; /* Used to interpolate LSFs */ 272 opus_int first_frame_after_reset; /* Flag for deactivating NLSF interpolation */ 273 const opus_uint8 *pitch_lag_low_bits_iCDF; /* Pointer to iCDF table for low bits of pitch lag index */ 274 const opus_uint8 *pitch_contour_iCDF; /* Pointer to iCDF table for pitch contour index */ 275 276 /* For buffering payload in case of more frames per packet */ 277 opus_int nFramesDecoded; 278 opus_int nFramesPerPacket; 279 280 /* Specifically for entropy coding */ 281 opus_int ec_prevSignalType; 282 opus_int16 ec_prevLagIndex; 283 284 opus_int VAD_flags[ MAX_FRAMES_PER_PACKET ]; 285 opus_int LBRR_flag; 286 opus_int LBRR_flags[ MAX_FRAMES_PER_PACKET ]; 287 288 silk_resampler_state_struct resampler_state; 289 290 const silk_NLSF_CB_struct *psNLSF_CB; /* Pointer to NLSF codebook */ 291 292 /* Quantization indices */ 293 SideInfoIndices indices; 294 295 /* CNG state */ 296 silk_CNG_struct sCNG; 297 298 /* Stuff used for PLC */ 299 opus_int lossCnt; 300 opus_int prevSignalType; 301 302 silk_PLC_struct sPLC; 303 304 } silk_decoder_state; 305 306 /************************/ 307 /* Decoder control */ 308 /************************/ 309 typedef struct { 310 /* Prediction and coding parameters */ 311 opus_int pitchL[ MAX_NB_SUBFR ]; 312 opus_int32 Gains_Q16[ MAX_NB_SUBFR ]; 313 /* Holds interpolated and final coefficients, 4-byte aligned */ 314 silk_DWORD_ALIGN opus_int16 PredCoef_Q12[ 2 ][ MAX_LPC_ORDER ]; 315 opus_int16 LTPCoef_Q14[ LTP_ORDER * MAX_NB_SUBFR ]; 316 opus_int LTP_scale_Q14; 317 } silk_decoder_control; 318 319 320 #ifdef __cplusplus 321 } 322 #endif 323 324 #endif 325
