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

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

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

    15 APIs and Frameworks collection. </p>

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

    17 provides a client API consisting of several interfaces that encapsulate a

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

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

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

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

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

    23 <title>              Multimedia APIs and Frameworks Architectural Overview

    24            </title>

    25 <image href="GUID-6A9991B8-CF03-5097-BE7D-FB486D26D41B_d0e265989_href.png" placement="inline"/>

    26 </fig> </section>

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

    28 the architecture of the components that constitutes the Multimedia APIs and

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

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

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

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

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

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

    35 the following components: </p> <ul>

    36 

    37 

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

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

    40 (ICL) </p> </li>

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

    42 (MMF) </p> </li>

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

    44 

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

    63 APIs and Frameworks collection provides cross-platform compatibility for client

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

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

    66 </conbody><related-links>

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

    68 

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

    70               Overview</linktext></link>

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

    72 Overview</linktext></link>

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

    74 Framework Overview</linktext></link>

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

    76 Utility Library Overview</linktext></link>

    77 

    78 </related-links></concept>