id	summary	reporter	owner	description	type	status	priority	milestone	component	version	severity	resolution	keywords	cc	mlocked
7517	Separate Volume control from Audio Output	mythtv@…	JYA	"The existing implementation for controlling audio volume from within MythTV is associated with the Audio Output system. The attached patches aim to separate the functionality of adjusting audio volume from the playback of audio content.

I feel that the proposed volume control implementation contained within the attached patches provides a number of improvements:

 * Volume Control Enumeration - The system provides user-friendly names within the Audio setup pages of MythFrontend.

 * Volume Control State Externalised - The system relies on the state of the volume control being stored externally. This approach simplifies scenarios such as changing channels whilst muted, which previously required special handling within the code.

 * Volume Control State Change Events - Any user interface component (e.g. the volume OSD) can be connected to the volume control interface so that it can be displayed whenever the volume control state changes. This approach correctly handles scenarios where the volume control may be modified by a means other than MythTV keypresses (e.g. if there are hardware controls for the volume). This follows more of a ""model"", ""view"", ""controller"" architecture.

With the exception of the software volume control implementation all interfaces target system level volume controls. Normally such controls should not be modified by an application, however as the primary intention of MythTV is to take control of the whole PC, these implementations provide the best results.

In order to provide device enumeration, these patches increase the minimum required version of OSS to be version 4 or greater. This makes it incompatible with OSS version 3, which is currently shipped with the linux kernel.

For correct operation, the patches attached to Ticket #6662 should also be applied."	Patch - Feature	closed	minor	unknown	MythTV - Audio Output	Master Head	low	Won't Fix	Volume		0