Difference between revisions of "Developer:Davaar:VolumeService"

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= Architecture Overview =
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#redirect[http://wiki.openhome.org/wiki/Av:Developer:VolumeService  http://wiki.openhome.org/wiki/Av:Developer:VolumeService]
The Delay Service maintains a list of delay Presets within the product. The size of this list is fixed for each product and reported by the PresetCount function. Each Preset can then be referenced by a unique index* in the list. Only one Preset, and thus one index, can be active at any given time. Each Preset stores three user configurable parameters;  Name, Delay and Visible. When a Preset is activated the value of its Delay parameter is applied to the audio signal path, provided the product's currently active source is delayable. [* index is zero based, ie 0,1,2,3,4,5..n, where n=PresetCount-1]
 
 
 
==Volume==
 
==Balance==
 
==Fade==
 
==Mute==
 
==Volume Actions==
 
 
 
=== Volume ===
 
=== Set Volume===
 
=== Volume Limit ===
 
=== Balance ===
 
=== Set Balance ===
 
=== Fade ===
 
=== Set Fade ===
 
=== Mute ===
 
=== Set Mute ===
 
 
 
==Preset Name==
 
Preset Name is a user configurable string parameter used to identify a Preset. The function SetPresetName is used to set the Name parameter.
 
 
 
==Preset Delay==
 
Preset Delay is a user configurable parameter that specifies the delay in milliseconds (ms) that should be applied'''*''', to the audio signal path, when the Preset is selected. The function SetPresetDelay is used to set the Delay parameter. '''[* Note: The delay will only be applied if the currently active source is delayable]'''
 
 
 
==Preset Visible==
 
Preset Visible is a user configurable boolean flag that specifies whether a Preset is visible when browsing the list of Presets via the product's front panel. The function SetPresetVisible is used to set the Visible flag.
 
 
 
==PresetXml ==
 
The function PresetXml returns, in XML format, a list of all Presets and their associated parameters Name, Delay and Visible.
 
 
 
==DelayMinimum==
 
DelayMinimum returns the minimum possible delay which can be applied to any Preset. DelayMinimum is read only.
 
 
 
==DelayMaximum==
 
DelayMaximum returns the maximum possible delay which can be applied to any Preset. DelayMaximum is read only.
 
 
 
==PresetCount==
 
PresetCount returns the number of presets that exist in the Delay Service (ie the Preset list size). PresetCount is read only.
 
 
 
 
 
= API Reference =
 
 
 
[http://oss.linn.co.uk/trac/browser/Main/LibUpnpCil/Services/Openhome/Volume1.xml Volume Service Description (XML)]
 
 
 
= Migration Guide =
 
None.
 
 
 
== Upnp Action Name Changes ==
 
None.
 
 
 
 
 
== Obsolete Functions ==
 
 
 
None.
 

Latest revision as of 08:36, 13 March 2020