1 <?xml version="1.0" encoding="utf-8"?>

     2 <!-- Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies) All rights reserved. -->

     3 <!-- This component and the accompanying materials are made available under the terms of the License 

     4 "Eclipse Public License v1.0" which accompanies this distribution, 

     5 and is available at the URL "http://www.eclipse.org/legal/epl-v10.html". -->

     6 <!-- Initial Contributors:

     7     Nokia Corporation - initial contribution.

     8 Contributors: 

     9 -->

    10 <!DOCTYPE concept

    11   PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">

    12 <concept id="GUID-536DCEAF-3598-4D3E-A812-E266720F350D" xml:lang="en"><title>Supported codecs</title><prolog><metadata><keywords/></metadata></prolog><conbody>

    13 <p>In order to play audio and video, devices need compression/decompression

    14 (codec) software or hardware that performs conversions between different

    15 compressed data types. Software codecs are implemented in software

    16 only, whereas hardware-accelerated codecs use hardware to perform

    17 some of the functions for increased processing speed. For more information,

    18 see <xref href="http://library.forum.nokia.com/topic/Design_and_User_Experience_Library/GUID-7FD77AB0-E89E-43B1-B33C-F9362D0618B1.html" scope="external">Video encoding guidelines</xref>.</p>

    19 <p><xref href="jar:GUID-35228542-8C95-4849-A73F-2B4F082F0C44.jar!/sdk/doc_source/reference/reference-cpp/Multimedia_Framework/index.html#Multimedia_Framework%2etoc" format="application/java-archive">The multimedia framework (MMF)</xref> is a high level interface

    20 for accessing audio and video  functionality. Codecs can be accessed

    21 through MMF or through a lower level audio device  driver, <codeph>DevSound</codeph>.</p>

    22 <section id="GUID-C96B6C7E-0DF8-43BF-8DC2-908E17F4F9A1"><title>To access codecs</title>

    23 <p>Use the following Symbian classes:</p>

    24 <ul>

    25 <li><p><xref href="jar:GUID-35228542-8C95-4849-A73F-2B4F082F0C44.jar!/sdk/doc_source/reference/reference-cpp/DevSound_API/CMMFDevSoundClass.html" format="application/java-archive"><parmname>CMMFDevSound</parmname></xref> enables audio functions

    26 on the device hardware.</p></li>

    27 <li><p><xref href="jar:GUID-35228542-8C95-4849-A73F-2B4F082F0C44.jar!/sdk/doc_source/reference/reference-cpp/Multimedia_Framework/CMdaAudioOutputStreamClass.html#_top title=" format="application/java-archive"><parmname>CMdaAudioOutputStream</parmname></xref></p><p> and <xref href="jar:GUID-35228542-8C95-4849-A73F-2B4F082F0C44.jar!/sdk/doc_source/reference/reference-cpp/Multimedia_Framework/CMdaAudioInputStreamClass.html#_top title=" format="application/java-archive"><parmname>CMdaAudioInputStream</parmname></xref> provide an

    28 interface for playing raw or encoded audio data.</p></li>

    29 <li><p><xref href="jar:GUID-35228542-8C95-4849-A73F-2B4F082F0C44.jar!/sdk/doc_source/reference/reference-cpp/Multimedia_Framework/CMMFCodecClass.html#_top title=" format="application/java-archive"><parmname>CMMFCodec</parmname></xref> decodes and encodes between

    30 different coding types, and provides access to MMF software codecs.</p>

    31 </li>

    32 <li><p><xref href="jar:GUID-35228542-8C95-4849-A73F-2B4F082F0C44.jar!/sdk/doc_source/reference/reference-cpp/Multimedia_Framework/CMdaAudioPlayerUtilityClass.html#%3a%3aCMdaAudioPlayerUtility" format="application/java-archive"><parmname>CmdaAudioPlayerUtility</parmname></xref> plays audio

    33 data.</p></li>

    34 <li><p><xref href="jar:GUID-35228542-8C95-4849-A73F-2B4F082F0C44.jar!/sdk/doc_source/reference/reference-cpp/Multimedia_Framework/CMdaAudioRecorderUtilityClass.html#%3a%3aCMdaAudioRecorderUtility" format="application/java-archive"><parmname>CmdaAudioRecorderUtility</parmname></xref> plays,

    35 records, and edits audio data.</p></li>

    36 <li><p><xref href="jar:GUID-35228542-8C95-4849-A73F-2B4F082F0C44.jar!/sdk/doc_source/reference/reference-cpp/Multimedia_Framework/CVideoPlayerUtilityClass.html#%3a%3aCVideoPlayerUtility" format="application/java-archive"><parmname>CVideoPlayerUtility</parmname></xref> plays sampled

    37 video data.</p></li>

    38 </ul>

    39 <p>For more information, see:</p>

    40 <ul>

    41 <li><p><xref href="http://www.forum.nokia.com/info/sw.nokia.com/id/bc72ffde-edb2-4f16-a8a7-dbd18a555011.html" scope="external">eLearning module</xref> on Multimedia Framework</p></li>

    42 <li><p><xref href="http://www.forum.nokia.com/info/sw.nokia.com/id/ae9307f6-e8b3-455d-81fc-0442aabc5526/Symbian_OS_Multimedia_Framework_And_Other_Multimedia_APIs_v1_0_en.pdf.html" scope="external">Symbian OS Multimedia Framework and Other Multimedia APIs</xref></p></li>

    43 <li><p><xref href="GUID-55CC7AD4-4C6A-5804-ABFD-F71505C77169.dita">Media Device Framework Overview</xref></p></li>

    44 <li><p><xref href="GUID-3483E654-38CC-538B-8B66-9D7A0C0B4025.dita">Supported Audio Codecs</xref></p></li>

    45 <li><p><xref href="GUID-D62A282E-9DEA-5EF3-A606-20647BC5049D.dita">Audio Client Overview </xref></p></li>

    46 <li><p><xref href="GUID-2DC80BA9-7AA2-5CD3-9105-1DE28CE196C1.dita">Video Client Overview</xref></p></li>

    47 <li><p><xref href="GUID-D9D2A600-89C6-5D82-8BC0-2C60D8F6517A.dita">Video HAI Overview</xref></p></li>

    48 </ul>

    49 </section>

    50 </conbody></concept>