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Diffstat (limited to 'tutorials/sndkit/sblive/vu.mac')
| -rw-r--r-- | tutorials/sndkit/sblive/vu.mac | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/tutorials/sndkit/sblive/vu.mac b/tutorials/sndkit/sblive/vu.mac new file mode 100644 index 0000000..c563d98 --- /dev/null +++ b/tutorials/sndkit/sblive/vu.mac @@ -0,0 +1,27 @@ +/* + * + * 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. + * + */ +// VU meter computation macros +// +// Simple VU +#define VU(vuvar, input) \ + TSTNEG(VUTMP, input, input, 0);\ + LIMIT(vuvar, vuvar, vuvar, VUTMP) +/* VU meter with volume scaling */ +#define VUSCALE(vuvar, input, scale) \ + MACS(VUTMP2, 0, input, scale) ;\ + TSTNEG(VUTMP, VUTMP2, VUTMP2, 0);\ + LIMIT(vuvar, vuvar, vuvar, VUTMP) +/* VU meter with volume scaling and summing with a 'base' signal */ +#define VUSCALESUM(vuvar, basevar, input, scale) \ + MACS(VUTMP2, basevar, input, scale) ;\ + TSTNEG(VUTMP, VUTMP2, VUTMP2, 0);\ + LIMIT(vuvar, vuvar, vuvar, VUTMP) |