Mercurial > hg > svcore
comparison base/AudioLevel.h @ 1429:48e9f538e6e9
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author | Chris Cannam |
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date | Thu, 01 Mar 2018 18:02:22 +0000 |
parents | cc27f35aa75c |
children | ad5f892c0c4d |
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1428:87ae75da6527 | 1429:48e9f538e6e9 |
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36 public: | 36 public: |
37 | 37 |
38 static const double DB_FLOOR; | 38 static const double DB_FLOOR; |
39 | 39 |
40 enum FaderType { | 40 enum FaderType { |
41 ShortFader = 0, // -40 -> +6 dB | 41 ShortFader = 0, // -40 -> +6 dB |
42 LongFader = 1, // -70 -> +10 dB | 42 LongFader = 1, // -70 -> +10 dB |
43 IEC268Meter = 2, // -70 -> 0 dB | 43 IEC268Meter = 2, // -70 -> 0 dB |
44 IEC268LongMeter = 3, // -70 -> +10 dB (0dB aligns with LongFader) | 44 IEC268LongMeter = 3, // -70 -> +10 dB (0dB aligns with LongFader) |
45 PreviewLevel = 4 | 45 PreviewLevel = 4 |
46 }; | 46 }; |
47 | 47 |
48 static double multiplier_to_dB(double multiplier); | 48 static double multiplier_to_dB(double multiplier); |
49 static double dB_to_multiplier(double dB); | 49 static double dB_to_multiplier(double dB); |
50 | 50 |
51 static double fader_to_dB(int level, int maxLevel, FaderType type); | 51 static double fader_to_dB(int level, int maxLevel, FaderType type); |
52 static int dB_to_fader(double dB, int maxFaderLevel, FaderType type); | 52 static int dB_to_fader(double dB, int maxFaderLevel, FaderType type); |
53 | 53 |
54 static double fader_to_multiplier(int level, int maxLevel, FaderType type); | 54 static double fader_to_multiplier(int level, int maxLevel, FaderType type); |
55 static int multiplier_to_fader(double multiplier, int maxFaderLevel, | 55 static int multiplier_to_fader(double multiplier, int maxFaderLevel, |
56 FaderType type); | 56 FaderType type); |
57 | 57 |
58 // fast if "levels" doesn't change often -- for audio segment previews | 58 // fast if "levels" doesn't change often -- for audio segment previews |
59 static int multiplier_to_preview(double multiplier, int levels); | 59 static int multiplier_to_preview(double multiplier, int levels); |
60 static double preview_to_multiplier(int level, int levels); | 60 static double preview_to_multiplier(int level, int levels); |
61 }; | 61 }; |