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<concept id="GUID-D6BB18FE-289D-546F-97DC-389B57B5B2E3" xml:lang="en"><title>Multimedia

APIs and Frameworks Overview </title><prolog><metadata><keywords/></metadata></prolog><conbody>

<p>This section provides an overview of all the components that form the Multimedia

APIs and Frameworks collection. </p>

<section><title>Purpose</title> <p>The Multimedia APIs and Frameworks collection

provides a client API consisting of several interfaces that encapsulate a

lightweight plug-in framework. The client API enables you to manipulate the

audio and video features of the Symbian platform. </p> </section>

<section><title>Architectural Relationship</title> <p>The following figure

shows the architectural of the components that form the Multimedia APIs and

Frameworks collection. </p> <fig id="GUID-E1D9CC8C-11B1-5BC5-A259-B77C5E06CD23">

<title>              Multimedia APIs and Frameworks Architectural Overview

           </title>

<image href="GUID-6A9991B8-CF03-5097-BE7D-FB486D26D41B_d0e507036_href.png" placement="inline"/>

</fig> </section>

<section><title>Description</title> <p>The Multimedia Framework overview details

the architecture of the components that constitutes the Multimedia APIs and

Frameworks collection. </p> <p>The Multimedia Subsystem provides the Multimedia

capabilities of the Symbian platform. It includes audio recording/playback,

video recording/playback, still image conversion and camera control. It includes

framework to support these, even if all these functionality are not included.

The function inclusion depends on the discretion of the device creator. </p> </section>

<section><title>Components</title> <p>The Multimedia APIs and Frameworks constitutes

the following components: </p> <ul>

<li id="GUID-36787CFE-5BF1-53A2-B3DF-C936CCAFAA33"><p>Camera API </p> </li>

<li id="GUID-A64B0DF5-59A8-5526-99AE-B8CA4A7E6244"><p>Image Conversion Library

(ICL) </p> </li>

<li id="GUID-BF05D850-1951-5E85-9A42-10885AB7B6BB"><p>Multimedia Framework

(MMF) </p> </li>

<li id="GUID-77EBAE98-96F5-5810-A540-FABE9EC3FDAB"><p>Multimedia Utility Library </p> </li>

</ul> <p><b>Camera </b> </p> <p>The

Onboard Camera API can be used to achieve video input streaming, and direct

screen access can be used to achieve video output streaming. For more information

about the Onboard Camera API, see <xref href="GUID-80EC80E2-E197-50F7-B1FD-720A00AC3B4D.dita">Onboard

Camera API Overview</xref>. </p> <p><b>Image Conversion Library </b> </p> <p>The

Image Conversion Library is a light-weight, client-side plug-in framework

for still image codecs. A number of software codecs are shipped with the Symbian

platform, most of which are un-optimised, but device creators may replace

them with optimised or hardware accelerated versions. The JPEG decoder / encoder

has been optimised. </p> <p><b>Multimedia Framework </b> </p> <p>The Multimedia

Framework is a light-weight, multi-threaded plug-in framework for handling

multimedia data, running as one or more threads in the application process.

The only controller plug-in supplied by default is a simple linear audio controller.

In turn this supports a number of formats and audio data types. In addition

two example controllers are supplied; one for audio (Ogg/Vorbis) and one for

video (Avi/XviD). </p> <p><b>Multimedia Utility Library </b> </p> <p>The Multimedia

Utility Library provides shared utilities for the MMF. </p> </section>

<section><title>Using Multimedia APIs and Frameworks</title> <p>The Multimedia

APIs and Frameworks collection provides cross-platform compatibility for client

applications and hardware acceleration plug-in writers, and reduces the cost

of porting the applications and codecs between platforms. </p> </section>

</conbody><related-links>

<link href="GUID-60ED8061-5410-5B8E-9532-22280F35DC1D.dita"><linktext/></link>

<link href="GUID-36C3A2FD-F4F9-5B8C-91B7-40C29B3D2224.dita"><linktext>Camera  

              Overview</linktext></link>

<link href="GUID-88091838-03FC-550F-9A3D-DA70907EF955.dita"><linktext>Imaging Frameworks

Overview</linktext></link>

<link href="GUID-A243699D-699C-5E45-A000-54C8DB4FF7AB.dita"><linktext>Multimedia

Framework Overview</linktext></link>

<link href="GUID-DDF4EA2E-59D6-5FE0-9C61-C5A9CBD8D4FE.dita"><linktext>Multimedia

Utility Library Overview</linktext></link>