How to play non-standard audio file in J2ME CLDC

Question

Hello,
I am developing an application for mobile. In this application I need to save the text and audio data in one file (extention of the file may be .mmo etc.), and then I need to play the audio from that file with the help of a mobile. (the file will be created with the help of a PC).
I am seeking for help, whether it is possible or is there any other solution? I want to save both text and audio in the same file to facilitate my user.
Your help or comments on my question will be greatly appreciated.
with best regard,

Answer 1

Hi japaneagle!
This is the way i would solve the problem and i have not tested it, So there can be some problems while implementing it. The approach is based on BASE64 encoding and XML, there can be some some limitation on file size.
This is the way.
1) first you have to encode the audio file using BASE64 encoding. Its about reading the bytes from file and encoding to BASE64 char sequence. You can find serveral BASE64 encoder examples in Java (do Google).
2) Now you have to create a XML file like this, assume that, file type is WAV and you have the encoded char sequnce..
<AudioFile>
<AudioFormat>WAV</AudioFormat>
<TextData>some text</TextData>
<AudioData>encoded BASE64 char sequence here</AudioData>
</AudioFile>
3) Assume that, now file is available in the memory card.Now you have to read it using File Connection API and parse it using kXML inside your MIDlet
4) After parsing it you will have file type and encoded BASE64 char sequnce..now you have to decode the charsequnce to byte[]. Then create a ByteArrayInputStream using the byte[].. Here you need a BASE64 Decoder..(do Google).
then create the player using Manager.createPlayer(InputStream stream, String type) MM API;
Now you can play the file...
You can add many attributes in the XML file if you want...
If you are going to use J2ME polish API for your UI then BASE64 won't be a problem, it has a Base64Encoder and Decoder..
-Jestan