Vitec Multimedia HDM850+ Manual de usuario descargar pdf (Pagina 43)

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VMC-7440_v8_0_6_Quick Start_V1_0_0.doc

Date: 3/18/2013

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registered in Windows’ Registry. Please refer to LiveWire Implementing Custom

Component.html document from \DevResources\Tutorial for further information.

7.8.21. How can I change a parameter from my application?

IAssemblyContainer interface has some methods that allow interacting directly with the

parameter of component.

get_ComponentParameter(BSTR bstrComponentName, BSTR bstrParameterName,

LONG* plVal);

This method returns current integer value parameter in plVal variable.

put_ComponentParameter(BSTR bstrComponentName, BSTR bstrParameterName,

LONG lVal);

This method sets current integer value to lVal.

get_ComponentParameterText(BSTR bstrComponentName, BSTR

bstrParameterName, BSTR* pbstrVal);

This method returns current text value parameter in pbstrVal variable.

put_ComponentParameterText(BSTR bstrComponentName, BSTR

bstrParameterName, BSTR bstrVal);

This method sets current text value bstrVal argument.

Please note that for parameters which are in a sub section (see paragraph 5.4), main

component and subsection must be specified following path rule:

bstrComponentName = L”MainComponent\\Subsection”.

For instance to modify Contrast parameters of Device it is necessary to add Video Input

section with this call.

m_pAssemblyContainer->put_ComponentParameter(L"Device\\Video Input", L"Contrast

", new_value);

7.8.22. Where can I find access rights, current, default, min and max value

for each parameter?

Parameter values are stored in the XML file in profile sections with their values and a

flag for access rights management.

Each bit of the AccessFlag represents different rights that can be combined.

1 = Read-only mode.

2 = Hidden mode (only visible from the Livewire Setting page when Show Hidden is

checked in the view menu).

8 = Protected mode (similar to read only except that right is cleared when creating a

child profile from the preset).

Other bits are reserved.

For integer parameters, there is current, default, max and min values described as

<Property AccessFlags="0" Current="XXX" Default="XXX" Max="XXX" Min="XXX"

Name="Parameter_name"/>

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Vitec Multimedia HDM850+ Manual de usuario Pagina 43