settings.h (6824B)
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 MODULES_AUDIO_CODING_CODECS_ISAC_MAIN_SOURCE_SETTINGS_H_ 19 #define 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 /* do not modify the following; this will have to be modified if we 28 * have a 20ms framesize option */ 29 /**********************************************************************/ 30 /* miliseconds */ 31 #define FRAMESIZE 30 32 /* number of samples per frame processed in the encoder, 480 */ 33 #define FRAMESAMPLES 480 /* ((FRAMESIZE*FS)/1000) */ 34 #define FRAMESAMPLES_HALF 240 35 #define FRAMESAMPLES_QUARTER 120 36 /**********************************************************************/ 37 38 /* max number of samples per frame (= 60 ms frame) */ 39 #define MAX_FRAMESAMPLES 960 40 #define MAX_SWBFRAMESAMPLES (MAX_FRAMESAMPLES * 2) 41 /* number of samples per 10ms frame */ 42 #define FRAMESAMPLES_10ms ((10 * FS) / 1000) 43 #define SWBFRAMESAMPLES_10ms (FRAMESAMPLES_10ms * 2) 44 /* number of samples in 30 ms frame */ 45 #define FRAMESAMPLES_30ms 480 46 /* number of subframes */ 47 #define SUBFRAMES 6 48 /* length of a subframe */ 49 #define UPDATE 80 50 /* length of half a subframe (low/high band) */ 51 #define HALF_SUBFRAMELEN (UPDATE / 2) 52 /* samples of look ahead (in a half-band, so actually 53 * half the samples of look ahead @ FS) */ 54 #define QLOOKAHEAD 24 /* 3 ms */ 55 /* order of AR model in spectral entropy coder */ 56 #define AR_ORDER 6 57 /* order of LP model in spectral entropy coder */ 58 #define LP_ORDER 0 59 60 /* window length (masking analysis) */ 61 #define WINLEN 256 62 /* order of low-band pole filter used to approximate masking curve */ 63 #define ORDERLO 12 64 /* order of hi-band pole filter used to approximate masking curve */ 65 #define ORDERHI 6 66 67 #define UB_LPC_ORDER 4 68 #define UB_LPC_VEC_PER_FRAME 2 69 #define UB16_LPC_VEC_PER_FRAME 4 70 #define UB_ACTIVE_SUBFRAMES 2 71 #define UB_MAX_LPC_ORDER 6 72 #define UB_INTERPOL_SEGMENTS 1 73 #define UB16_INTERPOL_SEGMENTS 3 74 #define LB_TOTAL_DELAY_SAMPLES 48 75 enum ISACBandwidth { isac8kHz = 8, isac12kHz = 12, isac16kHz = 16 }; 76 enum ISACBand { 77 kIsacLowerBand = 0, 78 kIsacUpperBand12 = 1, 79 kIsacUpperBand16 = 2 80 }; 81 enum IsacSamplingRate { kIsacWideband = 16, kIsacSuperWideband = 32 }; 82 #define UB_LPC_GAIN_DIM SUBFRAMES 83 #define FB_STATE_SIZE_WORD32 6 84 85 /* order for post_filter_bank */ 86 #define POSTQORDER 3 87 /* order for pre-filterbank */ 88 #define QORDER 3 89 /* another order */ 90 #define QORDER_ALL (POSTQORDER + QORDER - 1) 91 /* for decimator */ 92 #define ALLPASSSECTIONS 2 93 94 /* array size for byte stream in number of bytes. */ 95 /* The old maximum size still needed for the decoding */ 96 #define STREAM_SIZE_MAX 600 97 #define STREAM_SIZE_MAX_30 200 /* 200 bytes=53.4 kbps @ 30 ms.framelength */ 98 #define STREAM_SIZE_MAX_60 400 /* 400 bytes=53.4 kbps @ 60 ms.framelength */ 99 100 /* storage size for bit counts */ 101 #define BIT_COUNTER_SIZE 30 102 /* maximum order of any AR model or filter */ 103 #define MAX_AR_MODEL_ORDER 12 // 50 104 105 /* For pitch analysis */ 106 #define PITCH_FRAME_LEN (FRAMESAMPLES_HALF) /* 30 ms */ 107 #define PITCH_MAX_LAG 140 /* 57 Hz */ 108 #define PITCH_MIN_LAG 20 /* 400 Hz */ 109 #define PITCH_MAX_GAIN 0.45 110 #define PITCH_MAX_GAIN_06 0.27 /* PITCH_MAX_GAIN*0.6 */ 111 #define PITCH_MAX_GAIN_Q12 1843 112 #define PITCH_LAG_SPAN2 (PITCH_MAX_LAG / 2 - PITCH_MIN_LAG / 2 + 5) 113 #define PITCH_CORR_LEN2 60 /* 15 ms */ 114 #define PITCH_CORR_STEP2 (PITCH_FRAME_LEN / 4) 115 #define PITCH_BW 11 /* half the band width of correlation surface */ 116 #define PITCH_SUBFRAMES 4 117 #define PITCH_GRAN_PER_SUBFRAME 5 118 #define PITCH_SUBFRAME_LEN (PITCH_FRAME_LEN / PITCH_SUBFRAMES) 119 #define PITCH_UPDATE (PITCH_SUBFRAME_LEN / PITCH_GRAN_PER_SUBFRAME) 120 /* maximum number of peaks to be examined in correlation surface */ 121 #define PITCH_MAX_NUM_PEAKS 10 122 #define PITCH_PEAK_DECAY 0.85 123 /* For weighting filter */ 124 #define PITCH_WLPCORDER 6 125 #define PITCH_WLPCWINLEN PITCH_FRAME_LEN 126 #define PITCH_WLPCASYM 0.3 /* asymmetry parameter */ 127 #define PITCH_WLPCBUFLEN PITCH_WLPCWINLEN 128 /* For pitch filter */ 129 /* Extra 50 for fraction and LP filters */ 130 #define PITCH_BUFFSIZE (PITCH_MAX_LAG + 50) 131 #define PITCH_INTBUFFSIZE (PITCH_FRAME_LEN + PITCH_BUFFSIZE) 132 /* Max rel. step for interpolation */ 133 #define PITCH_UPSTEP 1.5 134 /* Max rel. step for interpolation */ 135 #define PITCH_DOWNSTEP 0.67 136 #define PITCH_FRACS 8 137 #define PITCH_FRACORDER 9 138 #define PITCH_DAMPORDER 5 139 #define PITCH_FILTDELAY 1.5f 140 /* stepsize for quantization of the pitch Gain */ 141 #define PITCH_GAIN_STEPSIZE 0.125 142 143 /* Order of high pass filter */ 144 #define HPORDER 2 145 146 /* some mathematical constants */ 147 /* log2(exp) */ 148 #define LOG2EXP 1.44269504088896 149 #define PI 3.14159265358979 150 151 /* Maximum number of iterations allowed to limit payload size */ 152 #define MAX_PAYLOAD_LIMIT_ITERATION 5 153 154 /* Redundant Coding */ 155 #define RCU_BOTTLENECK_BPS 16000 156 #define RCU_TRANSCODING_SCALE 0.40f 157 #define RCU_TRANSCODING_SCALE_INVERSE 2.5f 158 159 #define RCU_TRANSCODING_SCALE_UB 0.50f 160 #define RCU_TRANSCODING_SCALE_UB_INVERSE 2.0f 161 162 /* Define Error codes */ 163 /* 6000 General */ 164 #define ISAC_MEMORY_ALLOCATION_FAILED 6010 165 #define ISAC_MODE_MISMATCH 6020 166 #define ISAC_DISALLOWED_BOTTLENECK 6030 167 #define ISAC_DISALLOWED_FRAME_LENGTH 6040 168 #define ISAC_UNSUPPORTED_SAMPLING_FREQUENCY 6050 169 170 /* 6200 Bandwidth estimator */ 171 #define ISAC_RANGE_ERROR_BW_ESTIMATOR 6240 172 /* 6400 Encoder */ 173 #define ISAC_ENCODER_NOT_INITIATED 6410 174 #define ISAC_DISALLOWED_CODING_MODE 6420 175 #define ISAC_DISALLOWED_FRAME_MODE_ENCODER 6430 176 #define ISAC_DISALLOWED_BITSTREAM_LENGTH 6440 177 #define ISAC_PAYLOAD_LARGER_THAN_LIMIT 6450 178 #define ISAC_DISALLOWED_ENCODER_BANDWIDTH 6460 179 /* 6600 Decoder */ 180 #define ISAC_DECODER_NOT_INITIATED 6610 181 #define ISAC_EMPTY_PACKET 6620 182 #define ISAC_DISALLOWED_FRAME_MODE_DECODER 6630 183 #define ISAC_RANGE_ERROR_DECODE_FRAME_LENGTH 6640 184 #define ISAC_RANGE_ERROR_DECODE_BANDWIDTH 6650 185 #define ISAC_RANGE_ERROR_DECODE_PITCH_GAIN 6660 186 #define ISAC_RANGE_ERROR_DECODE_PITCH_LAG 6670 187 #define ISAC_RANGE_ERROR_DECODE_LPC 6680 188 #define ISAC_RANGE_ERROR_DECODE_SPECTRUM 6690 189 #define ISAC_LENGTH_MISMATCH 6730 190 #define ISAC_RANGE_ERROR_DECODE_BANDWITH 6740 191 #define ISAC_DISALLOWED_BANDWIDTH_MODE_DECODER 6750 192 #define ISAC_DISALLOWED_LPC_MODEL 6760 193 /* 6800 Call setup formats */ 194 #define ISAC_INCOMPATIBLE_FORMATS 6810 195 196 #endif /* MODULES_AUDIO_CODING_CODECS_ISAC_MAIN_SOURCE_SETTINGS_H_ */