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Diffstat (limited to 'lib/rbcodec/codecs/libopus/silk/tuning_parameters.h')
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1 files changed, 155 insertions, 0 deletions
diff --git a/lib/rbcodec/codecs/libopus/silk/tuning_parameters.h b/lib/rbcodec/codecs/libopus/silk/tuning_parameters.h new file mode 100644 index 0000000000..d70275fd8f --- /dev/null +++ b/lib/rbcodec/codecs/libopus/silk/tuning_parameters.h | |||
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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_TUNING_PARAMETERS_H | ||
29 | #define SILK_TUNING_PARAMETERS_H | ||
30 | |||
31 | #ifdef __cplusplus | ||
32 | extern "C" | ||
33 | { | ||
34 | #endif | ||
35 | |||
36 | /* Decay time for bitreservoir */ | ||
37 | #define BITRESERVOIR_DECAY_TIME_MS 500 | ||
38 | |||
39 | /*******************/ | ||
40 | /* Pitch estimator */ | ||
41 | /*******************/ | ||
42 | |||
43 | /* Level of noise floor for whitening filter LPC analysis in pitch analysis */ | ||
44 | #define FIND_PITCH_WHITE_NOISE_FRACTION 1e-3f | ||
45 | |||
46 | /* Bandwidth expansion for whitening filter in pitch analysis */ | ||
47 | #define FIND_PITCH_BANDWIDTH_EXPANSION 0.99f | ||
48 | |||
49 | /*********************/ | ||
50 | /* Linear prediction */ | ||
51 | /*********************/ | ||
52 | |||
53 | /* LPC analysis regularization */ | ||
54 | #define FIND_LPC_COND_FAC 1e-5f | ||
55 | |||
56 | /* Max cumulative LTP gain */ | ||
57 | #define MAX_SUM_LOG_GAIN_DB 250.0f | ||
58 | |||
59 | /* LTP analysis defines */ | ||
60 | #define LTP_CORR_INV_MAX 0.03f | ||
61 | |||
62 | /***********************/ | ||
63 | /* High pass filtering */ | ||
64 | /***********************/ | ||
65 | |||
66 | /* Smoothing parameters for low end of pitch frequency range estimation */ | ||
67 | #define VARIABLE_HP_SMTH_COEF1 0.1f | ||
68 | #define VARIABLE_HP_SMTH_COEF2 0.015f | ||
69 | #define VARIABLE_HP_MAX_DELTA_FREQ 0.4f | ||
70 | |||
71 | /* Min and max cut-off frequency values (-3 dB points) */ | ||
72 | #define VARIABLE_HP_MIN_CUTOFF_HZ 60 | ||
73 | #define VARIABLE_HP_MAX_CUTOFF_HZ 100 | ||
74 | |||
75 | /***********/ | ||
76 | /* Various */ | ||
77 | /***********/ | ||
78 | |||
79 | /* VAD threshold */ | ||
80 | #define SPEECH_ACTIVITY_DTX_THRES 0.05f | ||
81 | |||
82 | /* Speech Activity LBRR enable threshold */ | ||
83 | #define LBRR_SPEECH_ACTIVITY_THRES 0.3f | ||
84 | |||
85 | /*************************/ | ||
86 | /* Perceptual parameters */ | ||
87 | /*************************/ | ||
88 | |||
89 | /* reduction in coding SNR during low speech activity */ | ||
90 | #define BG_SNR_DECR_dB 2.0f | ||
91 | |||
92 | /* factor for reducing quantization noise during voiced speech */ | ||
93 | #define HARM_SNR_INCR_dB 2.0f | ||
94 | |||
95 | /* factor for reducing quantization noise for unvoiced sparse signals */ | ||
96 | #define SPARSE_SNR_INCR_dB 2.0f | ||
97 | |||
98 | /* threshold for sparseness measure above which to use lower quantization offset during unvoiced */ | ||
99 | #define ENERGY_VARIATION_THRESHOLD_QNT_OFFSET 0.6f | ||
100 | |||
101 | /* warping control */ | ||
102 | #define WARPING_MULTIPLIER 0.015f | ||
103 | |||
104 | /* fraction added to first autocorrelation value */ | ||
105 | #define SHAPE_WHITE_NOISE_FRACTION 3e-5f | ||
106 | |||
107 | /* noise shaping filter chirp factor */ | ||
108 | #define BANDWIDTH_EXPANSION 0.94f | ||
109 | |||
110 | /* harmonic noise shaping */ | ||
111 | #define HARMONIC_SHAPING 0.3f | ||
112 | |||
113 | /* extra harmonic noise shaping for high bitrates or noisy input */ | ||
114 | #define HIGH_RATE_OR_LOW_QUALITY_HARMONIC_SHAPING 0.2f | ||
115 | |||
116 | /* parameter for shaping noise towards higher frequencies */ | ||
117 | #define HP_NOISE_COEF 0.25f | ||
118 | |||
119 | /* parameter for shaping noise even more towards higher frequencies during voiced speech */ | ||
120 | #define HARM_HP_NOISE_COEF 0.35f | ||
121 | |||
122 | /* parameter for applying a high-pass tilt to the input signal */ | ||
123 | #define INPUT_TILT 0.05f | ||
124 | |||
125 | /* parameter for extra high-pass tilt to the input signal at high rates */ | ||
126 | #define HIGH_RATE_INPUT_TILT 0.1f | ||
127 | |||
128 | /* parameter for reducing noise at the very low frequencies */ | ||
129 | #define LOW_FREQ_SHAPING 4.0f | ||
130 | |||
131 | /* less reduction of noise at the very low frequencies for signals with low SNR at low frequencies */ | ||
132 | #define LOW_QUALITY_LOW_FREQ_SHAPING_DECR 0.5f | ||
133 | |||
134 | /* subframe smoothing coefficient for HarmBoost, HarmShapeGain, Tilt (lower -> more smoothing) */ | ||
135 | #define SUBFR_SMTH_COEF 0.4f | ||
136 | |||
137 | /* parameters defining the R/D tradeoff in the residual quantizer */ | ||
138 | #define LAMBDA_OFFSET 1.2f | ||
139 | #define LAMBDA_SPEECH_ACT -0.2f | ||
140 | #define LAMBDA_DELAYED_DECISIONS -0.05f | ||
141 | #define LAMBDA_INPUT_QUALITY -0.1f | ||
142 | #define LAMBDA_CODING_QUALITY -0.2f | ||
143 | #define LAMBDA_QUANT_OFFSET 0.8f | ||
144 | |||
145 | /* Compensation in bitrate calculations for 10 ms modes */ | ||
146 | #define REDUCE_BITRATE_10_MS_BPS 2200 | ||
147 | |||
148 | /* Maximum time before allowing a bandwidth transition */ | ||
149 | #define MAX_BANDWIDTH_SWITCH_DELAY_MS 5000 | ||
150 | |||
151 | #ifdef __cplusplus | ||
152 | } | ||
153 | #endif | ||
154 | |||
155 | #endif /* SILK_TUNING_PARAMETERS_H */ | ||