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Diffstat (limited to 'kernel/framework/vmix_core/db_scale.h')
| -rw-r--r-- | kernel/framework/vmix_core/db_scale.h | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/kernel/framework/vmix_core/db_scale.h b/kernel/framework/vmix_core/db_scale.h new file mode 100644 index 0000000..3b23edd --- /dev/null +++ b/kernel/framework/vmix_core/db_scale.h @@ -0,0 +1,45 @@ +/* + * 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 |