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-8D8202BB-1070-5EE2-85C0-E37AABA67340-GENID-1-8-1-18-1-1-5-1-7-1-6-1-5-1" xml:lang="en"><title>MmfExCodec:

    13 Multimedia Framework codec plug-in example</title><prolog><metadata><keywords/></metadata></prolog><conbody>

    14 <section><title>Description</title> <p> <filepath>MmfExCodec</filepath> demonstrates

    15 how to implement a codec plug-in for the Multimedia Framework. A codec converts

    16 media data in one encoding into another encoding. The example converts audio

    17 data encoded with PCM8 into PCM16. </p> <p>The program is an ECom plug-in

    18 that implements the codec interface <codeph>CMMFCodec</codeph> by the class <codeph>CMMFExPcm8Pcm16Codec</codeph>.

    19 When a client or media format requires a PCM8 to PCM16 codec, the Multimedia

    20 Framework will instantiate a <codeph>CMMFExPcm8Pcm16Codec</codeph> object,

    21 and call its <codeph>ProcessL()</codeph> member function to convert data supplied

    22 a source buffer. As converting PCM8 into PCM16 only requires expanding each

    23 byte in the source buffer into two bytes in the destination buffer, <codeph>CMMFExPcm8Pcm16Codec::ProcessL()</codeph> is

    24 not very complex. </p> </section>

    25 <section id="GUID-98F50184-E319-592D-A350-785799248B3C-GENID-1-8-1-18-1-1-5-1-7-1-6-1-5-1-2-2"><title>Download</title> <p>Click

    26 on the following link to download the example: <xref href="guid-6013a680-57f9-415b-8851-c4fa63356636/zips/guid-03d20b19-4462-40f7-bb6a-d91aaeea30b0.zip" scope="external"> MmfExCodec.zip file</xref></p><p>Click: <xref href="guid-6013a680-57f9-415b-8851-c4fa63356636/guid-03d20b19-4462-40f7-bb6a-d91aaeea30b0.html" scope="peer">browse </xref> to view the example code. </p> </section>

    27 <section><title>Class summary</title><p> <xref href="GUID-18F4082A-D301-3007-88DD-0E13AB81C74A.dita"><apiname>CMMFCodec </apiname></xref>  <xref href="GUID-AE26E6A4-C1AD-3B35-B5F7-CE0AB60169BB.dita"><apiname>CMMFDataBuffer </apiname></xref>  </p></section>

    28 </conbody></concept>