1 /* 2 * Copyright (c) 2012 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 * settings.h 13 * 14 * Declaration of #defines used in the iSAC codec 15 * 16 */ 17 18 #ifndef WEBRTC_MODULES_AUDIO_CODING_CODECS_ISAC_MAIN_SOURCE_SETTINGS_H_ 19 #define WEBRTC_MODULES_AUDIO_CODING_CODECS_ISAC_MAIN_SOURCE_SETTINGS_H_ 20 21 /* sampling frequency (Hz) */ 22 #define FS 16000 23 24 /* number of samples per frame (either 320 (20ms), 480 (30ms) or 960 (60ms)) */ 25 #define INITIAL_FRAMESAMPLES 960 26 27 28 #define MAXFFTSIZE 2048 29 #define NFACTOR 11 30 31 32 33 /* do not modify the following; this will have to be modified if we 34 * have a 20ms framesize option */ 35 /**********************************************************************/ 36 /* miliseconds */ 37 #define FRAMESIZE 30 38 /* number of samples per frame processed in the encoder, 480 */ 39 #define FRAMESAMPLES 480 /* ((FRAMESIZE*FS)/1000) */ 40 #define FRAMESAMPLES_HALF 240 41 #define FRAMESAMPLES_QUARTER 120 42 /**********************************************************************/ 43 44 45 46 /* max number of samples per frame (= 60 ms frame) */ 47 #define MAX_FRAMESAMPLES 960 48 #define MAX_SWBFRAMESAMPLES (MAX_FRAMESAMPLES * 2) 49 /* number of samples per 10ms frame */ 50 #define FRAMESAMPLES_10ms ((10*FS)/1000) 51 #define SWBFRAMESAMPLES_10ms (FRAMESAMPLES_10ms * 2) 52 /* number of samples in 30 ms frame */ 53 #define FRAMESAMPLES_30ms 480 54 /* number of subframes */ 55 #define SUBFRAMES 6 56 /* length of a subframe */ 57 #define UPDATE 80 58 /* length of half a subframe (low/high band) */ 59 #define HALF_SUBFRAMELEN (UPDATE/2) 60 /* samples of look ahead (in a half-band, so actually 61 * half the samples of look ahead @ FS) */ 62 #define QLOOKAHEAD 24 /* 3 ms */ 63 /* order of AR model in spectral entropy coder */ 64 #define AR_ORDER 6 65 /* order of LP model in spectral entropy coder */ 66 #define LP_ORDER 0 67 68 /* window length (masking analysis) */ 69 #define WINLEN 256 70 /* order of low-band pole filter used to approximate masking curve */ 71 #define ORDERLO 12 72 /* order of hi-band pole filter used to approximate masking curve */ 73 #define ORDERHI 6 74 75 #define UB_LPC_ORDER 4 76 #define UB_LPC_VEC_PER_FRAME 2 77 #define UB16_LPC_VEC_PER_FRAME 4 78 #define UB_ACTIVE_SUBFRAMES 2 79 #define UB_MAX_LPC_ORDER 6 80 #define UB_INTERPOL_SEGMENTS 1 81 #define UB16_INTERPOL_SEGMENTS 3 82 #define LB_TOTAL_DELAY_SAMPLES 48 83 enum ISACBandwidth {isac8kHz = 8, isac12kHz = 12, isac16kHz = 16}; 84 enum ISACBand {kIsacLowerBand = 0, kIsacUpperBand12 = 1, kIsacUpperBand16 = 2}; 85 #define UB_LPC_GAIN_DIM SUBFRAMES 86 #define FB_STATE_SIZE_WORD32 6 87 88 89 /* order for post_filter_bank */ 90 #define POSTQORDER 3 91 /* order for pre-filterbank */ 92 #define QORDER 3 93 /* another order */ 94 #define QORDER_ALL (POSTQORDER+QORDER-1) 95 /* for decimator */ 96 #define ALLPASSSECTIONS 2 97 98 99 /* array size for byte stream in number of bytes. */ 100 /* The old maximum size still needed for the decoding */ 101 #define STREAM_SIZE_MAX 600 102 #define STREAM_SIZE_MAX_30 200 /* 200 bytes=53.4 kbps @ 30 ms.framelength */ 103 #define STREAM_SIZE_MAX_60 400 /* 400 bytes=53.4 kbps @ 60 ms.framelength */ 104 105 /* storage size for bit counts */ 106 #define BIT_COUNTER_SIZE 30 107 /* maximum order of any AR model or filter */ 108 #define MAX_AR_MODEL_ORDER 12//50 109 110 111 /* For pitch analysis */ 112 #define PITCH_FRAME_LEN (FRAMESAMPLES_HALF) /* 30 ms */ 113 #define PITCH_MAX_LAG 140 /* 57 Hz */ 114 #define PITCH_MIN_LAG 20 /* 400 Hz */ 115 #define PITCH_MAX_GAIN 0.45 116 #define PITCH_MAX_GAIN_06 0.27 /* PITCH_MAX_GAIN*0.6 */ 117 #define PITCH_MAX_GAIN_Q12 1843 118 #define PITCH_LAG_SPAN2 (PITCH_MAX_LAG/2-PITCH_MIN_LAG/2+5) 119 #define PITCH_CORR_LEN2 60 /* 15 ms */ 120 #define PITCH_CORR_STEP2 (PITCH_FRAME_LEN/4) 121 #define PITCH_BW 11 /* half the band width of correlation surface */ 122 #define PITCH_SUBFRAMES 4 123 #define PITCH_GRAN_PER_SUBFRAME 5 124 #define PITCH_SUBFRAME_LEN (PITCH_FRAME_LEN/PITCH_SUBFRAMES) 125 #define PITCH_UPDATE (PITCH_SUBFRAME_LEN/PITCH_GRAN_PER_SUBFRAME) 126 /* maximum number of peaks to be examined in correlation surface */ 127 #define PITCH_MAX_NUM_PEAKS 10 128 #define PITCH_PEAK_DECAY 0.85 129 /* For weighting filter */ 130 #define PITCH_WLPCORDER 6 131 #define PITCH_WLPCWINLEN PITCH_FRAME_LEN 132 #define PITCH_WLPCASYM 0.3 /* asymmetry parameter */ 133 #define PITCH_WLPCBUFLEN PITCH_WLPCWINLEN 134 /* For pitch filter */ 135 /* Extra 50 for fraction and LP filters */ 136 #define PITCH_BUFFSIZE (PITCH_MAX_LAG + 50) 137 #define PITCH_INTBUFFSIZE (PITCH_FRAME_LEN+PITCH_BUFFSIZE) 138 /* Max rel. step for interpolation */ 139 #define PITCH_UPSTEP 1.5 140 /* Max rel. step for interpolation */ 141 #define PITCH_DOWNSTEP 0.67 142 #define PITCH_FRACS 8 143 #define PITCH_FRACORDER 9 144 #define PITCH_DAMPORDER 5 145 #define PITCH_FILTDELAY 1.5f 146 /* stepsize for quantization of the pitch Gain */ 147 #define PITCH_GAIN_STEPSIZE 0.125 148 149 150 151 /* Order of high pass filter */ 152 #define HPORDER 2 153 154 /* some mathematical constants */ 155 /* log2(exp) */ 156 #define LOG2EXP 1.44269504088896 157 #define PI 3.14159265358979 158 159 /* Maximum number of iterations allowed to limit payload size */ 160 #define MAX_PAYLOAD_LIMIT_ITERATION 5 161 162 /* Redundant Coding */ 163 #define RCU_BOTTLENECK_BPS 16000 164 #define RCU_TRANSCODING_SCALE 0.40f 165 #define RCU_TRANSCODING_SCALE_INVERSE 2.5f 166 167 #define RCU_TRANSCODING_SCALE_UB 0.50f 168 #define RCU_TRANSCODING_SCALE_UB_INVERSE 2.0f 169 170 171 /* Define Error codes */ 172 /* 6000 General */ 173 #define ISAC_MEMORY_ALLOCATION_FAILED 6010 174 #define ISAC_MODE_MISMATCH 6020 175 #define ISAC_DISALLOWED_BOTTLENECK 6030 176 #define ISAC_DISALLOWED_FRAME_LENGTH 6040 177 #define ISAC_UNSUPPORTED_SAMPLING_FREQUENCY 6050 178 179 /* 6200 Bandwidth estimator */ 180 #define ISAC_RANGE_ERROR_BW_ESTIMATOR 6240 181 /* 6400 Encoder */ 182 #define ISAC_ENCODER_NOT_INITIATED 6410 183 #define ISAC_DISALLOWED_CODING_MODE 6420 184 #define ISAC_DISALLOWED_FRAME_MODE_ENCODER 6430 185 #define ISAC_DISALLOWED_BITSTREAM_LENGTH 6440 186 #define ISAC_PAYLOAD_LARGER_THAN_LIMIT 6450 187 #define ISAC_DISALLOWED_ENCODER_BANDWIDTH 6460 188 /* 6600 Decoder */ 189 #define ISAC_DECODER_NOT_INITIATED 6610 190 #define ISAC_EMPTY_PACKET 6620 191 #define ISAC_DISALLOWED_FRAME_MODE_DECODER 6630 192 #define ISAC_RANGE_ERROR_DECODE_FRAME_LENGTH 6640 193 #define ISAC_RANGE_ERROR_DECODE_BANDWIDTH 6650 194 #define ISAC_RANGE_ERROR_DECODE_PITCH_GAIN 6660 195 #define ISAC_RANGE_ERROR_DECODE_PITCH_LAG 6670 196 #define ISAC_RANGE_ERROR_DECODE_LPC 6680 197 #define ISAC_RANGE_ERROR_DECODE_SPECTRUM 6690 198 #define ISAC_LENGTH_MISMATCH 6730 199 #define ISAC_RANGE_ERROR_DECODE_BANDWITH 6740 200 #define ISAC_DISALLOWED_BANDWIDTH_MODE_DECODER 6750 201 #define ISAC_DISALLOWED_LPC_MODEL 6760 202 /* 6800 Call setup formats */ 203 #define ISAC_INCOMPATIBLE_FORMATS 6810 204 205 #endif /* WEBRTC_MODULES_AUDIO_CODING_CODECS_ISAC_MAIN_SOURCE_SETTINGS_H_ */ 206