// Copyright (c) 2010, Niels Martin Hansen
// All rights reserved.
//
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/// @brief Styles audio may be rendered in
///
/// The constants are ordered by priority:
/// Primary has highest priority and should overlap selected, which should
/// overlap inactive, which should overlap normal regions.
enum AudioRenderingStyle {
	/// Regular audio with no special properties
	AudioStyle_Normal = 0,
	/// Audio belonging to objects that are not part of the current selection
	AudioStyle_Inactive,
	/// Audio belonging to objects that are part of the current selection,
	/// but not the primary work rage
	AudioStyle_Selected,
	/// Primary selection for work, usually coinciding with the primary playback range
	AudioStyle_Primary,
	/// Number of audio styles
	AudioStyle_MAX
};


/// @class AudioRenderingStyleRanges
/// @brief Abstract container for ranges of audio rendering styles
///
/// Interface for producers of audio rendering ranges, consumers should
/// implement this interface for objects to pass to producers.
class AudioRenderingStyleRanges {
protected:
	~AudioRenderingStyleRanges() { }
public:
	/// @brief Add a range to the line
	/// @param start First milisecond in range
	/// @param end   One past last milisecond in range
	/// @param style Style of the range added
	virtual void AddRange(int start, int end, AudioRenderingStyle style) = 0;
};