res_rtp_asterisk.c: Correct coefficient in MOS calculation.
Media Experience Score relies on incorrect pseudo_mos variable calculation. According to forming an opinion section of the documentation, calculation relies on ITU-T G.107 standard: https://docs.asterisk.org/Deployment/Media-Experience-Score/#forming-an-opinion ITU-T G.107 Annex B suggests to calculate MOS with a coefficient "seven times ten to the power of negative six", 7 * 10^(-6). which would mean 6 digits after the decimal point. Current implementation has 7 digits after the decimal point, which downrates the calls. Fixes: #597
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@ -6240,7 +6240,7 @@ static double calc_media_experience_score(struct ast_rtp_instance *instance,
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} else if (r_value > 100) {
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pseudo_mos = 4.5;
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} else {
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pseudo_mos = 1 + (0.035 * r_value) + (r_value * (r_value - 60) * (100 - r_value) * 0.0000007);
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pseudo_mos = 1 + (0.035 * r_value) + (r_value * (r_value - 60) * (100 - r_value) * 0.000007);
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}
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/*
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