/* * Purpose: dB to linear conversion tables for vmix */ /* * * This file is part of Open Sound System. * * Copyright (C) 4Front Technologies 1996-2008. * * This this source file is released under GPL v2 license (no other versions). * See the COPYING file included in the main directory of this source * distribution for the license terms and conditions. * */ /* * Attenuation table for dB->linear conversion. Indexed in steps of 0.5 dB. * Table size is 25 dB (first entry is handled as mute). */ #ifdef CONFIG_OSS_VMIX_FLOAT const float vmix_db_table[DB_SIZE + 1] = { 0.0 /* MUTE */ , 0.0035481, 0.0039811, 0.0044668, 0.0050119, 0.0056234, 0.0063096, 0.0070795, 0.0079433, 0.0089125, 0.01, 0.01122, 0.012589, 0.014125, 0.015849, 0.017783, 0.019953, 0.022387, 0.025119, 0.028184, 0.031623, 0.035481, 0.039811, 0.044668, 0.050119, 0.056234, 0.063096, 0.070795, 0.079433, 0.089125, 0.1, 0.1122, 0.12589, 0.14125, 0.15849, 0.17783, 0.19953, 0.22387, 0.25119, 0.28184, 0.31623, 0.35481, 0.39811, 0.44668, 0.50119, 0.56234, 0.63096, 0.70795, 0.79433, 0.89125, 1.0 /* Full level */ }; #else /* #define VMIX_VOL_SCALE moved to vmix.h */ const int vmix_db_table[DB_SIZE + 1] = { 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 4, 4, 5, 5, 6, 7, 8, 9, 10, 11, 12, 14, 16, 18, 20, 22, 25, 28, 32, 36, 40, 45, 50, 57, 64, 71, 80, 90, 101, 114, 128 }; #endif