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<concept xml:lang="en" id="GUID-A721FC4A-03C6-59F7-A0D2-565C4828E5E1"><title>Camera Stub Plug-in Library Overview</title><prolog><metadata><keywords/></metadata></prolog><conbody><p>This document introduces you to the Camera Stub Plug-in library overview. </p> <section><title>Purpose</title> <p>The purpose of this document is to provides a detailed description about the Camera Stub Plug-in implementation. </p> </section> <section><title>Camera Stub Plug-in library details</title> <p>The DLL that provides the functionality and the library to which your code must link is identified below. </p> <table id="GUID-F04D49F6-7EDD-5FF3-B3F4-379266D7F4DB"><tgroup cols="3"><colspec colname="col0"/><colspec colname="col1"/><colspec colname="col2"/><thead><row><entry>DLL</entry> <entry>LIB</entry> <entry>Short Description</entry> </row> </thead> <tbody><row><entry><p> <xref href="GUID-5B53C229-F86B-32EA-9185-290EB508942A.dita"><apiname>EcamStubPlugin.dll</apiname></xref>  </p> </entry> <entry><p> <xref href="GUID-75314782-EFB5-3BBA-82CF-D40A986631CD.dita"><apiname>ECamStubPlugin.h</apiname></xref>  </p> <p> <xref href="GUID-36E234FB-4049-3601-92B6-ACC451A3A983.dita"><apiname>ecom/ecom.h</apiname></xref>  </p> <p> <xref href="GUID-78112462-7106-3990-8ADE-2F5378A65922.dita"><apiname>ecom/implementationproxy.h</apiname></xref>  </p> <p> <xref href="GUID-2C80914C-987C-3208-9FA5-FD9D29FD3D8E.dita"><apiname>ecamuids.hr</apiname></xref>  </p> </entry> <entry><p>These files are used to implement the Camera Stub Plug-in functionalities. </p> </entry> </row> </tbody> </tgroup> </table> </section> <section><title>Architecture</title> <p>The Symbian platform no longer supports re-implementation of ECam component. Device creators who re-implement ECam should complete their migration to the ECam plug-in framework. Device creators already using the ECam plug-in framework are unaffected. Clients of the interfaces are also unaffected. </p> </section> <section><title>Description</title> <p>Symbian introduced the plug-in support for ECam from v9.1 onwards. Before that, device creators were supposed to re-implement ecam.cpp, which was effectively reference code. </p> <p>Device creators who re-implement ECam should use the Symbian-provided implementations. These implementations are available through the affected cpp files. In particular, to complete migration to the ECam plug-in framework, device creators should derive their class from <xref href="GUID-A738B809-754B-3090-9209-0880687F173C.dita"><apiname>CCameraPlugin</apiname></xref> instead of <xref href="GUID-021C509B-C821-3401-B2F4-DE7F52BB16D4.dita"><apiname>CCamera</apiname></xref>. A resource file also needs to be created so that the specific plug-in gets chosen. Device creators will have to link against <codeph>ecampluginsupport</codeph>. </p> <p> <codeph>ECamStubplugin</codeph> is example code that helps in understanding the steps needed to migrate to the plug-in framework, and the API design is described in the ECam Design Onboard Camera API document. </p> </section> <section><title>APIs</title> <p>The key classes that make up the Camera Plug-in API is <xref href="GUID-A738B809-754B-3090-9209-0880687F173C.dita"><apiname>CCameraPlugin</apiname></xref>. </p> </section> <section><title>Using Camera Stub Plug-in</title> <p>The Camera Stub Plug-in is used to facilitate the creation of a new Camera Plug-ins component. </p> <p>The following test code is used as an example to create a new Camera Plug-ins component: </p> <codeblock id="GUID-93E2D806-8A6B-5498-BE38-E5C27168F6BB" xml:space="preserve">// 10207084.RSS

//

#include “Ecom\RegistryInfo.rh”

#include “EcamUids.hrh”

RESOURCE REGISTRY_INFO theInfo

    {

    dll_uid = KuidOnboardCameraTestDll;

    interfaces = 

        {

        INTERFACE_INFO

            {

            interface_uid = KuidOnboardCameraPlugin;

            implementations = 

                {

                IMPLEMENTATION_INFO

                    {

                    implementation_uid = KuidOnboardCameraTestPlugin;

                    version_no = 2;

                    display_name =”Ecam Test Plug-in”;

                    opaque_data = “0;”;

                    default_data=”*”;

                    }

                };

            },

        INTERFACE_INFO

            {

            interface_uid = KuidOnboardCameraInfoPlugin;

            implementations = 

                {

                IMPLEMENTATION_INFO

                    {

                    implementation_uid = KuidOnboardCameraTestInfo;

                    version_no = 2;

                    display_name = “Ecam Test InfoPlugin”;

                    opaque_data = “0;”;

                    default_data=”*”;

                    }

                };

            }

        };

    }</codeblock> </section> </conbody><related-links><link href="GUID-F25862A3-51E5-581A-9CC9-964791781E69.dita"><linktext>Camera Plug-in Support

                Overview</linktext> </link> <link href="GUID-93D08C5F-D864-59E3-963D-D836EBE88B4D.dita"><linktext>Camera Plug-in Support Tutorial</linktext> </link> <link href="GUID-36C3A2FD-F4F9-5B8C-91B7-40C29B3D2224.dita"><linktext>Camera

                Component Overview</linktext> </link> </related-links></concept>