| /* |
| * Copyright (c) 2011 The WebRTC project authors. All Rights Reserved. |
| * |
| * Use of this source code is governed by a BSD-style license |
| * that can be found in the LICENSE file in the root of the source |
| * tree. An additional intellectual property rights grant can be found |
| * in the file PATENTS. All contributing project authors may |
| * be found in the AUTHORS file in the root of the source tree. |
| */ |
| |
| /* |
| * settings.h |
| * |
| * Declaration of #defines used in the iSAC codec |
| * |
| */ |
| |
| #ifndef WEBRTC_MODULES_AUDIO_CODING_CODECS_ISAC_MAIN_SOURCE_SETTINGS_H_ |
| #define WEBRTC_MODULES_AUDIO_CODING_CODECS_ISAC_MAIN_SOURCE_SETTINGS_H_ |
| |
| /* sampling frequency (Hz) */ |
| #define FS 16000 |
| |
| /* number of samples per frame (either 320 (20ms), 480 (30ms) or 960 (60ms)) */ |
| #define INITIAL_FRAMESAMPLES 960 |
| |
| |
| #define MAXFFTSIZE 2048 |
| #define NFACTOR 11 |
| |
| |
| |
| /* do not modify the following; this will have to be modified if we have a 20ms framesize option */ |
| /*************************************************************************************************/ |
| /* miliseconds */ |
| #define FRAMESIZE 30 |
| /* number of samples per frame processed in the encoder, 480 */ |
| #define FRAMESAMPLES 480 /* ((FRAMESIZE*FS)/1000) */ |
| #define FRAMESAMPLES_HALF 240 |
| #define FRAMESAMPLES_QUARTER 120 |
| /*************************************************************************************************/ |
| |
| |
| |
| /* max number of samples per frame (= 60 ms frame) */ |
| #define MAX_FRAMESAMPLES 960 |
| #define MAX_SWBFRAMESAMPLES (MAX_FRAMESAMPLES * 2) |
| /* number of samples per 10ms frame */ |
| #define FRAMESAMPLES_10ms ((10*FS)/1000) |
| #define SWBFRAMESAMPLES_10ms (FRAMESAMPLES_10ms * 2) |
| /* number of samples in 30 ms frame */ |
| #define FRAMESAMPLES_30ms 480 |
| /* number of subframes */ |
| #define SUBFRAMES 6 |
| /* length of a subframe */ |
| #define UPDATE 80 |
| /* length of half a subframe (low/high band) */ |
| #define HALF_SUBFRAMELEN (UPDATE/2) |
| /* samples of look ahead (in a half-band, so actually half the samples of look ahead @ FS) */ |
| #define QLOOKAHEAD 24 /* 3 ms */ |
| /* order of AR model in spectral entropy coder */ |
| #define AR_ORDER 6 |
| /* order of LP model in spectral entropy coder */ |
| #define LP_ORDER 0 |
| |
| /* window length (masking analysis) */ |
| #define WINLEN 256 |
| /* order of low-band pole filter used to approximate masking curve */ |
| #define ORDERLO 12 |
| /* order of hi-band pole filter used to approximate masking curve */ |
| #define ORDERHI 6 |
| |
| #define UB_LPC_ORDER 4 |
| #define UB_LPC_VEC_PER_FRAME 2 |
| #define UB16_LPC_VEC_PER_FRAME 4 |
| #define UB_ACTIVE_SUBFRAMES 2 |
| #define UB_MAX_LPC_ORDER 6 |
| #define UB_INTERPOL_SEGMENTS 1 |
| #define UB16_INTERPOL_SEGMENTS 3 |
| #define LB_TOTAL_DELAY_SAMPLES 48 |
| enum ISACBandwidth {isac8kHz = 8, isac12kHz = 12, isac16kHz = 16}; |
| enum ISACBand{isacLowerBand = 0, isacUpperBand = 1}; |
| #define UB_LPC_GAIN_DIM SUBFRAMES |
| #define FB_STATE_SIZE_WORD32 6 |
| |
| |
| /* order for post_filter_bank */ |
| #define POSTQORDER 3 |
| /* order for pre-filterbank */ |
| #define QORDER 3 |
| /* another order */ |
| #define QORDER_ALL (POSTQORDER+QORDER-1) |
| /* for decimator */ |
| #define ALLPASSSECTIONS 2 |
| |
| |
| /* array size for byte stream in number of bytes. */ |
| #define STREAM_SIZE_MAX 600 /* The old maximum size still needed for the decoding */ |
| #define STREAM_SIZE_MAX_30 200 /* 200 bytes = 53.4 kbit/s @ 30 ms.framelength */ |
| #define STREAM_SIZE_MAX_60 400 /* 400 bytes = 53.4 kbit/s @ 60 ms.framelength */ |
| |
| /* storage size for bit counts */ |
| #define BIT_COUNTER_SIZE 30 |
| /* maximum order of any AR model or filter */ |
| #define MAX_AR_MODEL_ORDER 12//50 |
| |
| |
| /* For pitch analysis */ |
| #define PITCH_FRAME_LEN (FRAMESAMPLES_HALF) /* 30 ms */ |
| #define PITCH_MAX_LAG 140 /* 57 Hz */ |
| #define PITCH_MIN_LAG 20 /* 400 Hz */ |
| #define PITCH_MAX_GAIN 0.45 |
| #define PITCH_MAX_GAIN_06 0.27 /* PITCH_MAX_GAIN*0.6 */ |
| #define PITCH_MAX_GAIN_Q12 1843 |
| #define PITCH_LAG_SPAN2 (PITCH_MAX_LAG/2-PITCH_MIN_LAG/2+5) |
| #define PITCH_CORR_LEN2 60 /* 15 ms */ |
| #define PITCH_CORR_STEP2 (PITCH_FRAME_LEN/4) |
| #define PITCH_BW 11 /* half the band width of correlation surface */ |
| #define PITCH_SUBFRAMES 4 |
| #define PITCH_GRAN_PER_SUBFRAME 5 |
| #define PITCH_SUBFRAME_LEN (PITCH_FRAME_LEN/PITCH_SUBFRAMES) |
| #define PITCH_UPDATE (PITCH_SUBFRAME_LEN/PITCH_GRAN_PER_SUBFRAME) |
| /* maximum number of peaks to be examined in correlation surface */ |
| #define PITCH_MAX_NUM_PEAKS 10 |
| #define PITCH_PEAK_DECAY 0.85 |
| /* For weighting filter */ |
| #define PITCH_WLPCORDER 6 |
| #define PITCH_WLPCWINLEN PITCH_FRAME_LEN |
| #define PITCH_WLPCASYM 0.3 /* asymmetry parameter */ |
| #define PITCH_WLPCBUFLEN PITCH_WLPCWINLEN |
| /* For pitch filter */ |
| #define PITCH_BUFFSIZE (PITCH_MAX_LAG + 50) /* Extra 50 for fraction and LP filters */ |
| #define PITCH_INTBUFFSIZE (PITCH_FRAME_LEN+PITCH_BUFFSIZE) |
| /* Max rel. step for interpolation */ |
| #define PITCH_UPSTEP 1.5 |
| /* Max rel. step for interpolation */ |
| #define PITCH_DOWNSTEP 0.67 |
| #define PITCH_FRACS 8 |
| #define PITCH_FRACORDER 9 |
| #define PITCH_DAMPORDER 5 |
| #define PITCH_FILTDELAY 1.5f |
| /* stepsize for quantization of the pitch Gain */ |
| #define PITCH_GAIN_STEPSIZE 0.125 |
| |
| |
| |
| /* Order of high pass filter */ |
| #define HPORDER 2 |
| |
| /* some mathematical constants */ |
| #define LOG2EXP 1.44269504088896 /* log2(exp) */ |
| #define PI 3.14159265358979 |
| |
| /* Maximum number of iterations allowed to limit payload size */ |
| #define MAX_PAYLOAD_LIMIT_ITERATION 5 |
| |
| /* Redundant Coding */ |
| #define RCU_BOTTLENECK_BPS 16000 |
| #define RCU_TRANSCODING_SCALE 0.40f |
| #define RCU_TRANSCODING_SCALE_INVERSE 2.5f |
| |
| #define RCU_TRANSCODING_SCALE_UB 0.50f |
| #define RCU_TRANSCODING_SCALE_UB_INVERSE 2.0f |
| |
| |
| /* Define Error codes */ |
| /* 6000 General */ |
| #define ISAC_MEMORY_ALLOCATION_FAILED 6010 |
| #define ISAC_MODE_MISMATCH 6020 |
| #define ISAC_DISALLOWED_BOTTLENECK 6030 |
| #define ISAC_DISALLOWED_FRAME_LENGTH 6040 |
| #define ISAC_UNSUPPORTED_SAMPLING_FREQUENCY 6050 |
| |
| /* 6200 Bandwidth estimator */ |
| #define ISAC_RANGE_ERROR_BW_ESTIMATOR 6240 |
| /* 6400 Encoder */ |
| #define ISAC_ENCODER_NOT_INITIATED 6410 |
| #define ISAC_DISALLOWED_CODING_MODE 6420 |
| #define ISAC_DISALLOWED_FRAME_MODE_ENCODER 6430 |
| #define ISAC_DISALLOWED_BITSTREAM_LENGTH 6440 |
| #define ISAC_PAYLOAD_LARGER_THAN_LIMIT 6450 |
| #define ISAC_DISALLOWED_ENCODER_BANDWIDTH 6460 |
| /* 6600 Decoder */ |
| #define ISAC_DECODER_NOT_INITIATED 6610 |
| #define ISAC_EMPTY_PACKET 6620 |
| #define ISAC_DISALLOWED_FRAME_MODE_DECODER 6630 |
| #define ISAC_RANGE_ERROR_DECODE_FRAME_LENGTH 6640 |
| #define ISAC_RANGE_ERROR_DECODE_BANDWIDTH 6650 |
| #define ISAC_RANGE_ERROR_DECODE_PITCH_GAIN 6660 |
| #define ISAC_RANGE_ERROR_DECODE_PITCH_LAG 6670 |
| #define ISAC_RANGE_ERROR_DECODE_LPC 6680 |
| #define ISAC_RANGE_ERROR_DECODE_SPECTRUM 6690 |
| #define ISAC_LENGTH_MISMATCH 6730 |
| #define ISAC_RANGE_ERROR_DECODE_BANDWITH 6740 |
| #define ISAC_DISALLOWED_BANDWIDTH_MODE_DECODER 6750 |
| /* 6800 Call setup formats */ |
| #define ISAC_INCOMPATIBLE_FORMATS 6810 |
| |
| #endif /* WEBRTC_MODULES_AUDIO_CODING_CODECS_ISAC_MAIN_SOURCE_SETTINGS_H_ */ |
