1 /* 2 * Copyright (c) 2011 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 /* 12 * structs.h 13 * 14 * This header file contains all the structs used in the ISAC codec 15 * 16 */ 17 18 #ifndef WEBRTC_MODULES_AUDIO_CODING_CODECS_ISAC_FIX_SOURCE_STRUCTS_H_ 19 #define WEBRTC_MODULES_AUDIO_CODING_CODECS_ISAC_FIX_SOURCE_STRUCTS_H_ 20 21 22 #include "webrtc/common_audio/signal_processing/include/signal_processing_library.h" 23 #include "webrtc/modules/audio_coding/codecs/isac/bandwidth_info.h" 24 #include "webrtc/modules/audio_coding/codecs/isac/fix/source/settings.h" 25 #include "webrtc/typedefs.h" 26 27 /* Bitstream struct for decoder */ 28 typedef struct Bitstreamstruct_dec { 29 30 uint16_t stream[INTERNAL_STREAM_SIZE_W16]; /* Array bytestream to decode */ 31 uint32_t W_upper; /* Upper boundary of interval W */ 32 uint32_t streamval; 33 uint16_t stream_index; /* Index to the current position in bytestream */ 34 int16_t full; /* 0 - first byte in memory filled, second empty*/ 35 /* 1 - both bytes are empty (we just filled the previous memory */ 36 37 size_t stream_size; /* The size of stream in bytes. */ 38 } Bitstr_dec; 39 40 /* Bitstream struct for encoder */ 41 typedef struct Bitstreamstruct_enc { 42 43 uint16_t stream[STREAM_MAXW16_60MS]; /* Vector for adding encoded bytestream */ 44 uint32_t W_upper; /* Upper boundary of interval W */ 45 uint32_t streamval; 46 uint16_t stream_index; /* Index to the current position in bytestream */ 47 int16_t full; /* 0 - first byte in memory filled, second empty*/ 48 /* 1 - both bytes are empty (we just filled the previous memory */ 49 50 } Bitstr_enc; 51 52 53 typedef struct { 54 55 int16_t DataBufferLoQ0[WINLEN]; 56 int16_t DataBufferHiQ0[WINLEN]; 57 58 int32_t CorrBufLoQQ[ORDERLO+1]; 59 int32_t CorrBufHiQQ[ORDERHI+1]; 60 61 int16_t CorrBufLoQdom[ORDERLO+1]; 62 int16_t CorrBufHiQdom[ORDERHI+1]; 63 64 int32_t PreStateLoGQ15[ORDERLO+1]; 65 int32_t PreStateHiGQ15[ORDERHI+1]; 66 67 uint32_t OldEnergy; 68 69 } MaskFiltstr_enc; 70 71 72 73 typedef struct { 74 75 int16_t PostStateLoGQ0[ORDERLO+1]; 76 int16_t PostStateHiGQ0[ORDERHI+1]; 77 78 uint32_t OldEnergy; 79 80 } MaskFiltstr_dec; 81 82 83 84 85 86 87 88 89 typedef struct { 90 91 //state vectors for each of the two analysis filters 92 93 int32_t INSTAT1_fix[2*(QORDER-1)]; 94 int32_t INSTAT2_fix[2*(QORDER-1)]; 95 int16_t INLABUF1_fix[QLOOKAHEAD]; 96 int16_t INLABUF2_fix[QLOOKAHEAD]; 97 98 /* High pass filter */ 99 int32_t HPstates_fix[HPORDER]; 100 101 } PreFiltBankstr; 102 103 104 typedef struct { 105 106 //state vectors for each of the two analysis filters 107 int32_t STATE_0_LOWER_fix[2*POSTQORDER]; 108 int32_t STATE_0_UPPER_fix[2*POSTQORDER]; 109 110 /* High pass filter */ 111 112 int32_t HPstates1_fix[HPORDER]; 113 int32_t HPstates2_fix[HPORDER]; 114 115 } PostFiltBankstr; 116 117 typedef struct { 118 119 120 /* data buffer for pitch filter */ 121 int16_t ubufQQ[PITCH_BUFFSIZE]; 122 123 /* low pass state vector */ 124 int16_t ystateQQ[PITCH_DAMPORDER]; 125 126 /* old lag and gain */ 127 int16_t oldlagQ7; 128 int16_t oldgainQ12; 129 130 } PitchFiltstr; 131 132 133 134 typedef struct { 135 136 //for inital estimator 137 int16_t dec_buffer16[PITCH_CORR_LEN2+PITCH_CORR_STEP2+PITCH_MAX_LAG/2-PITCH_FRAME_LEN/2+2]; 138 int32_t decimator_state32[2*ALLPASSSECTIONS+1]; 139 int16_t inbuf[QLOOKAHEAD]; 140 141 PitchFiltstr PFstr_wght; 142 PitchFiltstr PFstr; 143 144 145 } PitchAnalysisStruct; 146 147 148 typedef struct { 149 /* Parameters used in PLC to avoid re-computation */ 150 151 /* --- residual signals --- */ 152 int16_t prevPitchInvIn[FRAMESAMPLES/2]; 153 int16_t prevPitchInvOut[PITCH_MAX_LAG + 10]; // [FRAMESAMPLES/2]; save 90 154 int32_t prevHP[PITCH_MAX_LAG + 10]; // [FRAMESAMPLES/2]; save 90 155 156 157 int16_t decayCoeffPriodic; /* how much to supress a sample */ 158 int16_t decayCoeffNoise; 159 int16_t used; /* if PLC is used */ 160 161 162 int16_t *lastPitchLP; // [FRAMESAMPLES/2]; saved 240; 163 164 165 /* --- LPC side info --- */ 166 int16_t lofilt_coefQ15[ ORDERLO ]; 167 int16_t hifilt_coefQ15[ ORDERHI ]; 168 int32_t gain_lo_hiQ17[2]; 169 170 /* --- LTP side info --- */ 171 int16_t AvgPitchGain_Q12; 172 int16_t lastPitchGain_Q12; 173 int16_t lastPitchLag_Q7; 174 175 /* --- Add-overlap in recovery packet --- */ 176 int16_t overlapLP[ RECOVERY_OVERLAP ]; // [FRAMESAMPLES/2]; saved 160 177 178 int16_t pitchCycles; 179 int16_t A; 180 int16_t B; 181 size_t pitchIndex; 182 size_t stretchLag; 183 int16_t *prevPitchLP; // [ FRAMESAMPLES/2 ]; saved 240 184 int16_t seed; 185 186 int16_t std; 187 } PLCstr; 188 189 190 191 /* Have instance of struct together with other iSAC structs */ 192 typedef struct { 193 194 int16_t prevFrameSizeMs; /* Previous frame size (in ms) */ 195 uint16_t prevRtpNumber; /* Previous RTP timestamp from received packet */ 196 /* (in samples relative beginning) */ 197 uint32_t prevSendTime; /* Send time for previous packet, from RTP header */ 198 uint32_t prevArrivalTime; /* Arrival time for previous packet (in ms using timeGetTime()) */ 199 uint16_t prevRtpRate; /* rate of previous packet, derived from RTP timestamps (in bits/s) */ 200 uint32_t lastUpdate; /* Time since the last update of the Bottle Neck estimate (in samples) */ 201 uint32_t lastReduction; /* Time sinse the last reduction (in samples) */ 202 int32_t countUpdates; /* How many times the estimate was update in the beginning */ 203 204 /* The estimated bottle neck rate from there to here (in bits/s) */ 205 uint32_t recBw; 206 uint32_t recBwInv; 207 uint32_t recBwAvg; 208 uint32_t recBwAvgQ; 209 210 uint32_t minBwInv; 211 uint32_t maxBwInv; 212 213 /* The estimated mean absolute jitter value, as seen on this side (in ms) */ 214 int32_t recJitter; 215 int32_t recJitterShortTerm; 216 int32_t recJitterShortTermAbs; 217 int32_t recMaxDelay; 218 int32_t recMaxDelayAvgQ; 219 220 221 int16_t recHeaderRate; /* (assumed) bitrate for headers (bps) */ 222 223 uint32_t sendBwAvg; /* The estimated bottle neck rate from here to there (in bits/s) */ 224 int32_t sendMaxDelayAvg; /* The estimated mean absolute jitter value, as seen on the other siee (in ms) */ 225 226 227 int16_t countRecPkts; /* number of packets received since last update */ 228 int16_t highSpeedRec; /* flag for marking that a high speed network has been detected downstream */ 229 230 /* number of consecutive pkts sent during which the bwe estimate has 231 remained at a value greater than the downstream threshold for determining highspeed network */ 232 int16_t countHighSpeedRec; 233 234 /* flag indicating bwe should not adjust down immediately for very late pckts */ 235 int16_t inWaitPeriod; 236 237 /* variable holding the time of the start of a window of time when 238 bwe should not adjust down immediately for very late pckts */ 239 uint32_t startWaitPeriod; 240 241 /* number of consecutive pkts sent during which the bwe estimate has 242 remained at a value greater than the upstream threshold for determining highspeed network */ 243 int16_t countHighSpeedSent; 244 245 /* flag indicated the desired number of packets over threshold rate have been sent and 246 bwe will assume the connection is over broadband network */ 247 int16_t highSpeedSend; 248 249 IsacBandwidthInfo external_bw_info; 250 } BwEstimatorstr; 251 252 253 typedef struct { 254 255 /* boolean, flags if previous packet exceeded B.N. */ 256 int16_t PrevExceed; 257 /* ms */ 258 int16_t ExceedAgo; 259 /* packets left to send in current burst */ 260 int16_t BurstCounter; 261 /* packets */ 262 int16_t InitCounter; 263 /* ms remaining in buffer when next packet will be sent */ 264 int16_t StillBuffered; 265 266 } RateModel; 267 268 /* The following strutc is used to store data from encoding, to make it 269 fast and easy to construct a new bitstream with a different Bandwidth 270 estimate. All values (except framelength and minBytes) is double size to 271 handle 60 ms of data. 272 */ 273 typedef struct { 274 275 /* Used to keep track of if it is first or second part of 60 msec packet */ 276 int startIdx; 277 278 /* Frame length in samples */ 279 int16_t framelength; 280 281 /* Pitch Gain */ 282 int16_t pitchGain_index[2]; 283 284 /* Pitch Lag */ 285 int32_t meanGain[2]; 286 int16_t pitchIndex[PITCH_SUBFRAMES*2]; 287 288 /* LPC */ 289 int32_t LPCcoeffs_g[12*2]; /* KLT_ORDER_GAIN = 12 */ 290 int16_t LPCindex_s[108*2]; /* KLT_ORDER_SHAPE = 108 */ 291 int16_t LPCindex_g[12*2]; /* KLT_ORDER_GAIN = 12 */ 292 293 /* Encode Spec */ 294 int16_t fre[FRAMESAMPLES]; 295 int16_t fim[FRAMESAMPLES]; 296 int16_t AvgPitchGain[2]; 297 298 /* Used in adaptive mode only */ 299 int minBytes; 300 301 } IsacSaveEncoderData; 302 303 typedef struct { 304 305 Bitstr_enc bitstr_obj; 306 MaskFiltstr_enc maskfiltstr_obj; 307 PreFiltBankstr prefiltbankstr_obj; 308 PitchFiltstr pitchfiltstr_obj; 309 PitchAnalysisStruct pitchanalysisstr_obj; 310 RateModel rate_data_obj; 311 312 int16_t buffer_index; 313 int16_t current_framesamples; 314 315 int16_t data_buffer_fix[FRAMESAMPLES]; // the size was MAX_FRAMESAMPLES 316 317 int16_t frame_nb; 318 int16_t BottleNeck; 319 int16_t MaxDelay; 320 int16_t new_framelength; 321 int16_t s2nr; 322 uint16_t MaxBits; 323 324 int16_t bitstr_seed; 325 #ifdef WEBRTC_ISAC_FIX_NB_CALLS_ENABLED 326 PostFiltBankstr interpolatorstr_obj; 327 #endif 328 329 IsacSaveEncoderData *SaveEnc_ptr; 330 int16_t payloadLimitBytes30; /* Maximum allowed number of bits for a 30 msec packet */ 331 int16_t payloadLimitBytes60; /* Maximum allowed number of bits for a 30 msec packet */ 332 int16_t maxPayloadBytes; /* Maximum allowed number of bits for both 30 and 60 msec packet */ 333 int16_t maxRateInBytes; /* Maximum allowed rate in bytes per 30 msec packet */ 334 int16_t enforceFrameSize; /* If set iSAC will never change packet size */ 335 336 } IsacFixEncoderInstance; 337 338 339 typedef struct { 340 341 Bitstr_dec bitstr_obj; 342 MaskFiltstr_dec maskfiltstr_obj; 343 PostFiltBankstr postfiltbankstr_obj; 344 PitchFiltstr pitchfiltstr_obj; 345 PLCstr plcstr_obj; /* TS; for packet loss concealment */ 346 347 #ifdef WEBRTC_ISAC_FIX_NB_CALLS_ENABLED 348 PreFiltBankstr decimatorstr_obj; 349 #endif 350 351 } IsacFixDecoderInstance; 352 353 354 355 typedef struct { 356 357 IsacFixEncoderInstance ISACenc_obj; 358 IsacFixDecoderInstance ISACdec_obj; 359 BwEstimatorstr bwestimator_obj; 360 int16_t CodingMode; /* 0 = adaptive; 1 = instantaneous */ 361 int16_t errorcode; 362 int16_t initflag; /* 0 = nothing initiated; 1 = encoder or decoder */ 363 /* not initiated; 2 = all initiated */ 364 } ISACFIX_SubStruct; 365 366 367 typedef struct { 368 int32_t lpcGains[12]; /* 6 lower-band & 6 upper-band we may need to double it for 60*/ 369 /* */ 370 uint32_t W_upper; /* Upper boundary of interval W */ 371 uint32_t streamval; 372 uint16_t stream_index; /* Index to the current position in bytestream */ 373 int16_t full; /* 0 - first byte in memory filled, second empty*/ 374 /* 1 - both bytes are empty (we just filled the previous memory */ 375 uint16_t beforeLastWord; 376 uint16_t lastWord; 377 } transcode_obj; 378 379 380 //Bitstr_enc myBitStr; 381 382 #endif /* WEBRTC_MODULES_AUDIO_CODING_CODECS_ISAC_FIX_SOURCE_STRUCTS_H_ */ 383
