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<concept id="GUID-A0620D7E-F54C-5DE1-BED9-B34C5B851716" xml:lang="en"><title>MmfExFormatPlugin:

Multimedia Framework format encoder/decoder plug-ins example</title><prolog><metadata><keywords/></metadata></prolog><conbody>

<section><title>Description</title> <p> <filepath>MmfExFormatPlugin</filepath> demonstrates

how to implement format encoder and decoder plug-ins for the Multimedia Framework.

Multimedia data is usually packaged in a particular format, which specify

the properties of the data (e.g. duration, frame intervals), and how the buffers

for holding the data are organised. A format decoder plug-in is responsible

for reading a particular format; a format encoder plug-in for writing a particular

format. </p> <p>The example handles the RAW audio format (PCM data with no

headers). The decoder plug-in <codeph>CMMFRawFormatRead</codeph> reads RAW

audio; it implements the ECom interface <codeph>CMMFFormatDecode</codeph>.

The encoder plug-in <codeph>CMMFRawFormatWrite</codeph> writes RAW audio:

it implements the ECom interface <codeph>CMMFFormatEncode</codeph>. </p> </section>

<section id="GUID-274A59C1-E06A-584E-A014-6DBDFA772CB8"><title>Download</title> <p>Click

on the following link to download the example: <xref href="guid-6013a680-57f9-415b-8851-c4fa63356636/zips/guid-c45b20eb-0700-4957-9e3a-d7c3e5a2180f.zip" scope="external">MmfExFormatPlugin.zip file</xref></p><p>Click: <xref href="guid-6013a680-57f9-415b-8851-c4fa63356636/guid-c45b20eb-0700-4957-9e3a-d7c3e5a2180f.html" scope="peer">browse </xref> to view the example code. </p> </section>

<section><title>Class summary</title><p> <xref href="GUID-708A7583-5C55-3FE1-8238-974C8821588D.dita"><apiname>MDataSink </apiname></xref>  <xref href="GUID-765257E7-403F-3D8E-8A5E-E1679F247F33.dita"><apiname>CMMFFormatDecode </apiname></xref>  <xref href="GUID-2230F976-A798-30EB-ABA6-09C86716A4B5.dita"><apiname>MDataSource </apiname></xref> <xref href="GUID-AE26E6A4-C1AD-3B35-B5F7-CE0AB60169BB.dita"><apiname> CMMFDataBuffer </apiname></xref>  <xref href="GUID-3E6BEFFD-698D-397A-9112-C9D330B5244B.dita"><apiname>CMMFChannelAndSampleRateConverterFactory </apiname></xref>  <xref href="GUID-A032838C-1F41-328E-900A-2683B1EBF1A7.dita"><apiname>CMMFChannelAndSampleRateConverter </apiname></xref>  <xref href="GUID-9A7A83ED-592B-3A0C-BABB-3B90099BCF7C.dita"><apiname>CMMFBuffer </apiname></xref> <xref href="GUID-9CD77063-1956-3EA9-9A82-17FDD6497CC7.dita"><apiname> CMMFFormatEncode </apiname></xref>  </p></section>

</conbody></concept>