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_int32 sDiff_shp_Q14; 52 opus_int lagPrev; 53 opus_int sLTP_buf_idx; 54 opus_int sLTP_shp_buf_idx; 55 opus_int32 rand_seed; 56 opus_int32 prev_gain_Q16; 57 opus_int rewhite_flag; 58 } silk_nsq_state; 59 60 /********************************/ 61 /* VAD state */ 62 /********************************/ 63 typedef struct { 64 opus_int32 AnaState[ 2 ]; /* Analysis filterbank state: 0-8 kHz */ 65 opus_int32 AnaState1[ 2 ]; /* Analysis filterbank state: 0-4 kHz */ 66 opus_int32 AnaState2[ 2 ]; /* Analysis filterbank state: 0-2 kHz */ 67 opus_int32 XnrgSubfr[ VAD_N_BANDS ]; /* Subframe energies */ 68 opus_int32 NrgRatioSmth_Q8[ VAD_N_BANDS ]; /* Smoothed energy level in each band */ 69 opus_int16 HPstate; /* State of differentiator in the lowest band */ 70 opus_int32 NL[ VAD_N_BANDS ]; /* Noise energy level in each band */ 71 opus_int32 inv_NL[ VAD_N_BANDS ]; /* Inverse noise energy level in each band */ 72 opus_int32 NoiseLevelBias[ VAD_N_BANDS ]; /* Noise level estimator bias/offset */ 73 opus_int32 counter; /* Frame counter used in the initial phase */ 74 } silk_VAD_state; 75 76 /* Variable cut-off low-pass filter state */ 77 typedef struct { 78 opus_int32 In_LP_State[ 2 ]; /* Low pass filter state */ 79 opus_int32 transition_frame_no; /* Counter which is mapped to a cut-off frequency */ 80 opus_int mode; /* Operating mode, <0: switch down, >0: switch up; 0: do nothing */ 81 opus_int32 saved_fs_kHz; /* If non-zero, holds the last sampling rate before a bandwidth switching reset. */ 82 } silk_LP_state; 83 84 /* Structure containing NLSF codebook */ 85 typedef struct { 86 const opus_int16 nVectors; 87 const opus_int16 order; 88 const opus_int16 quantStepSize_Q16; 89 const opus_int16 invQuantStepSize_Q6; 90 const opus_uint8 *CB1_NLSF_Q8; 91 const opus_int16 *CB1_Wght_Q9; 92 const opus_uint8 *CB1_iCDF; 93 const opus_uint8 *pred_Q8; 94 const opus_uint8 *ec_sel; 95 const opus_uint8 *ec_iCDF; 96 const opus_uint8 *ec_Rates_Q5; 97 const opus_int16 *deltaMin_Q15; 98 } silk_NLSF_CB_struct; 99 100 typedef struct { 101 opus_int16 pred_prev_Q13[ 2 ]; 102 opus_int16 sMid[ 2 ]; 103 opus_int16 sSide[ 2 ]; 104 opus_int32 mid_side_amp_Q0[ 4 ]; 105 opus_int16 smth_width_Q14; 106 opus_int16 width_prev_Q14; 107 opus_int16 silent_side_len; 108 opus_int8 predIx[ MAX_FRAMES_PER_PACKET ][ 2 ][ 3 ]; 109 opus_int8 mid_only_flags[ MAX_FRAMES_PER_PACKET ]; 110 } stereo_enc_state; 111 112 typedef struct { 113 opus_int16 pred_prev_Q13[ 2 ]; 114 opus_int16 sMid[ 2 ]; 115 opus_int16 sSide[ 2 ]; 116 } stereo_dec_state; 117 118 typedef struct { 119 opus_int8 GainsIndices[ MAX_NB_SUBFR ]; 120 opus_int8 LTPIndex[ MAX_NB_SUBFR ]; 121 opus_int8 NLSFIndices[ MAX_LPC_ORDER + 1 ]; 122 opus_int16 lagIndex; 123 opus_int8 contourIndex; 124 opus_int8 signalType; 125 opus_int8 quantOffsetType; 126 opus_int8 NLSFInterpCoef_Q2; 127 opus_int8 PERIndex; 128 opus_int8 LTP_scaleIndex; 129 opus_int8 Seed; 130 } SideInfoIndices; 131 132 /********************************/ 133 /* Encoder state */ 134 /********************************/ 135 typedef struct { 136 opus_int32 In_HP_State[ 2 ]; /* High pass filter state */ 137 opus_int32 variable_HP_smth1_Q15; /* State of first smoother */ 138 opus_int32 variable_HP_smth2_Q15; /* State of second smoother */ 139 silk_LP_state sLP; /* Low pass filter state */ 140 silk_VAD_state sVAD; /* Voice activity detector state */ 141 silk_nsq_state sNSQ; /* Noise Shape Quantizer State */ 142 opus_int16 prev_NLSFq_Q15[ MAX_LPC_ORDER ]; /* Previously quantized NLSF vector */ 143 opus_int speech_activity_Q8; /* Speech activity */ 144 opus_int allow_bandwidth_switch; /* Flag indicating that switching of internal bandwidth is allowed */ 145 opus_int8 LBRRprevLastGainIndex; 146 opus_int8 prevSignalType; 147 opus_int prevLag; 148 opus_int pitch_LPC_win_length; 149 opus_int max_pitch_lag; /* Highest possible pitch lag (samples) */ 150 opus_int32 API_fs_Hz; /* API sampling frequency (Hz) */ 151 opus_int32 prev_API_fs_Hz; /* Previous API sampling frequency (Hz) */ 152 opus_int maxInternal_fs_Hz; /* Maximum internal sampling frequency (Hz) */ 153 opus_int minInternal_fs_Hz; /* Minimum internal sampling frequency (Hz) */ 154 opus_int desiredInternal_fs_Hz; /* Soft request for internal sampling frequency (Hz) */ 155 opus_int fs_kHz; /* Internal sampling frequency (kHz) */ 156 opus_int nb_subfr; /* Number of 5 ms subframes in a frame */ 157 opus_int frame_length; /* Frame length (samples) */ 158 opus_int subfr_length; /* Subframe length (samples) */ 159 opus_int ltp_mem_length; /* Length of LTP memory */ 160 opus_int la_pitch; /* Look-ahead for pitch analysis (samples) */ 161 opus_int la_shape; /* Look-ahead for noise shape analysis (samples) */ 162 opus_int shapeWinLength; /* Window length for noise shape analysis (samples) */ 163 opus_int32 TargetRate_bps; /* Target bitrate (bps) */ 164 opus_int PacketSize_ms; /* Number of milliseconds to put in each packet */ 165 opus_int PacketLoss_perc; /* Packet loss rate measured by farend */ 166 opus_int32 frameCounter; 167 opus_int Complexity; /* Complexity setting */ 168 opus_int nStatesDelayedDecision; /* Number of states in delayed decision quantization */ 169 opus_int useInterpolatedNLSFs; /* Flag for using NLSF interpolation */ 170 opus_int shapingLPCOrder; /* Filter order for noise shaping filters */ 171 opus_int predictLPCOrder; /* Filter order for prediction filters */ 172 opus_int pitchEstimationComplexity; /* Complexity level for pitch estimator */ 173 opus_int pitchEstimationLPCOrder; /* Whitening filter order for pitch estimator */ 174 opus_int32 pitchEstimationThreshold_Q16; /* Threshold for pitch estimator */ 175 opus_int32 sum_log_gain_Q7; /* Cumulative max prediction gain */ 176 opus_int NLSF_MSVQ_Survivors; /* Number of survivors in NLSF MSVQ */ 177 opus_int first_frame_after_reset; /* Flag for deactivating NLSF interpolation, pitch prediction */ 178 opus_int controlled_since_last_payload; /* Flag for ensuring codec_control only runs once per packet */ 179 opus_int warping_Q16; /* Warping parameter for warped noise shaping */ 180 opus_int useCBR; /* Flag to enable constant bitrate */ 181 opus_int prefillFlag; /* Flag to indicate that only buffers are prefilled, no coding */ 182 const opus_uint8 *pitch_lag_low_bits_iCDF; /* Pointer to iCDF table for low bits of pitch lag index */ 183 const opus_uint8 *pitch_contour_iCDF; /* Pointer to iCDF table for pitch contour index */ 184 const silk_NLSF_CB_struct *psNLSF_CB; /* Pointer to NLSF codebook */ 185 opus_int input_quality_bands_Q15[ VAD_N_BANDS ]; 186 opus_int input_tilt_Q15; 187 opus_int SNR_dB_Q7; /* Quality setting */ 188 189 opus_int8 VAD_flags[ MAX_FRAMES_PER_PACKET ]; 190 opus_int8 LBRR_flag; 191 opus_int LBRR_flags[ MAX_FRAMES_PER_PACKET ]; 192 193 SideInfoIndices indices; 194 opus_int8 pulses[ MAX_FRAME_LENGTH ]; 195 196 int arch; 197 198 /* Input/output buffering */ 199 opus_int16 inputBuf[ MAX_FRAME_LENGTH + 2 ]; /* Buffer containing input signal */ 200 opus_int inputBufIx; 201 opus_int nFramesPerPacket; 202 opus_int nFramesEncoded; /* Number of frames analyzed in current packet */ 203 204 opus_int nChannelsAPI; 205 opus_int nChannelsInternal; 206 opus_int channelNb; 207 208 /* Parameters For LTP scaling Control */ 209 opus_int frames_since_onset; 210 211 /* Specifically for entropy coding */ 212 opus_int ec_prevSignalType; 213 opus_int16 ec_prevLagIndex; 214 215 silk_resampler_state_struct resampler_state; 216 217 /* DTX */ 218 opus_int useDTX; /* Flag to enable DTX */ 219 opus_int inDTX; /* Flag to signal DTX period */ 220 opus_int noSpeechCounter; /* Counts concecutive nonactive frames, used by DTX */ 221 222 /* Inband Low Bitrate Redundancy (LBRR) data */ 223 opus_int useInBandFEC; /* Saves the API setting for query */ 224 opus_int LBRR_enabled; /* Depends on useInBandFRC, bitrate and packet loss rate */ 225 opus_int LBRR_GainIncreases; /* Gains increment for coding LBRR frames */ 226 SideInfoIndices indices_LBRR[ MAX_FRAMES_PER_PACKET ]; 227 opus_int8 pulses_LBRR[ MAX_FRAMES_PER_PACKET ][ MAX_FRAME_LENGTH ]; 228 } silk_encoder_state; 229 230 231 /* Struct for Packet Loss Concealment */ 232 typedef struct { 233 opus_int32 pitchL_Q8; /* Pitch lag to use for voiced concealment */ 234 opus_int16 LTPCoef_Q14[ LTP_ORDER ]; /* LTP coeficients to use for voiced concealment */ 235 opus_int16 prevLPC_Q12[ MAX_LPC_ORDER ]; 236 opus_int last_frame_lost; /* Was previous frame lost */ 237 opus_int32 rand_seed; /* Seed for unvoiced signal generation */ 238 opus_int16 randScale_Q14; /* Scaling of unvoiced random signal */ 239 opus_int32 conc_energy; 240 opus_int conc_energy_shift; 241 opus_int16 prevLTP_scale_Q14; 242 opus_int32 prevGain_Q16[ 2 ]; 243 opus_int fs_kHz; 244 opus_int nb_subfr; 245 opus_int subfr_length; 246 } silk_PLC_struct; 247 248 /* Struct for CNG */ 249 typedef struct { 250 opus_int32 CNG_exc_buf_Q14[ MAX_FRAME_LENGTH ]; 251 opus_int16 CNG_smth_NLSF_Q15[ MAX_LPC_ORDER ]; 252 opus_int32 CNG_synth_state[ MAX_LPC_ORDER ]; 253 opus_int32 CNG_smth_Gain_Q16; 254 opus_int32 rand_seed; 255 opus_int fs_kHz; 256 } silk_CNG_struct; 257 258 /********************************/ 259 /* Decoder state */ 260 /********************************/ 261 typedef struct { 262 opus_int32 prev_gain_Q16; 263 opus_int32 exc_Q14[ MAX_FRAME_LENGTH ]; 264 opus_int32 sLPC_Q14_buf[ MAX_LPC_ORDER ]; 265 opus_int16 outBuf[ MAX_FRAME_LENGTH + 2 * MAX_SUB_FRAME_LENGTH ]; /* Buffer for output signal */ 266 opus_int lagPrev; /* Previous Lag */ 267 opus_int8 LastGainIndex; /* Previous gain index */ 268 opus_int fs_kHz; /* Sampling frequency in kHz */ 269 opus_int32 fs_API_hz; /* API sample frequency (Hz) */ 270 opus_int nb_subfr; /* Number of 5 ms subframes in a frame */ 271 opus_int frame_length; /* Frame length (samples) */ 272 opus_int subfr_length; /* Subframe length (samples) */ 273 opus_int ltp_mem_length; /* Length of LTP memory */ 274 opus_int LPC_order; /* LPC order */ 275 opus_int16 prevNLSF_Q15[ MAX_LPC_ORDER ]; /* Used to interpolate LSFs */ 276 opus_int first_frame_after_reset; /* Flag for deactivating NLSF interpolation */ 277 const opus_uint8 *pitch_lag_low_bits_iCDF; /* Pointer to iCDF table for low bits of pitch lag index */ 278 const opus_uint8 *pitch_contour_iCDF; /* Pointer to iCDF table for pitch contour index */ 279 280 /* For buffering payload in case of more frames per packet */ 281 opus_int nFramesDecoded; 282 opus_int nFramesPerPacket; 283 284 /* Specifically for entropy coding */ 285 opus_int ec_prevSignalType; 286 opus_int16 ec_prevLagIndex; 287 288 opus_int VAD_flags[ MAX_FRAMES_PER_PACKET ]; 289 opus_int LBRR_flag; 290 opus_int LBRR_flags[ MAX_FRAMES_PER_PACKET ]; 291 292 silk_resampler_state_struct resampler_state; 293 294 const silk_NLSF_CB_struct *psNLSF_CB; /* Pointer to NLSF codebook */ 295 296 /* Quantization indices */ 297 SideInfoIndices indices; 298 299 /* CNG state */ 300 silk_CNG_struct sCNG; 301 302 /* Stuff used for PLC */ 303 opus_int lossCnt; 304 opus_int prevSignalType; 305 int arch; 306 307 silk_PLC_struct sPLC; 308 309 } silk_decoder_state; 310 311 /************************/ 312 /* Decoder control */ 313 /************************/ 314 typedef struct { 315 /* Prediction and coding parameters */ 316 opus_int pitchL[ MAX_NB_SUBFR ]; 317 opus_int32 Gains_Q16[ MAX_NB_SUBFR ]; 318 /* Holds interpolated and final coefficients, 4-byte aligned */ 319 silk_DWORD_ALIGN opus_int16 PredCoef_Q12[ 2 ][ MAX_LPC_ORDER ]; 320 opus_int16 LTPCoef_Q14[ LTP_ORDER * MAX_NB_SUBFR ]; 321 opus_int LTP_scale_Q14; 322 } silk_decoder_control; 323 324 325 #ifdef __cplusplus 326 } 327 #endif 328 329 #endif 330
