33 lines
1.2 KiB
C#
33 lines
1.2 KiB
C#
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namespace FDK
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{
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/// <summary>
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/// SongGainController provides a central place through which song preview
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/// and song playback attempt to apply BS1770GAIN-based loudness metadata
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/// or .tja SONGVOL as the Gain of a song sound.
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///
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/// By doing so through SongGainController instead of directly against the
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/// song (preview) CSound object, SongGainController can override the Gain
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/// value based on configuration or other information.
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/// </summary>
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public sealed class SongGainController
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{
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public bool ApplyLoudnessMetadata { private get; set; }
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public Lufs TargetLoudness { private get; set; }
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public bool ApplySongVol { private get; set; }
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public void Set(int songVol, LoudnessMetadata? songLoudnessMetadata, CSound sound)
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{
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if (ApplyLoudnessMetadata && songLoudnessMetadata.HasValue)
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{
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var gain = TargetLoudness - songLoudnessMetadata.Value.Integrated;
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sound.SetGain(gain, songLoudnessMetadata.Value.TruePeak);
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}
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else
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{
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sound.SetGain(ApplySongVol ? songVol : CSound.DefaultSongVol);
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}
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}
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}
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}
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