Developer Tips on SGH-X426/X427 JAVA Application Version 1.0
Notes to developers
1. Sound
Samsung SGH-X426 and SGH-X427 support MA2/SMAF and MA3/SMAF data files (.mmf files). Samsung recommends game developers to use Yamaha MA3 for the best sound quality. To make MMF files from MIDI files, please refer to http://smaf-yamaha.com/.
2. Vibration
Sound and vibration cannot be activated at the same time on the SGH-X426/X427. If sound and vibration functions are called at the same time, sound is either cut off or delayed. It is possible to activate vibration by using SMAF files which includes vibration data. However, in this case, vibration alone cannot be turned off.
3. Image Decoding Buffer
On the SGH-X426/X427, image data is managed by an Image Decoding Buffer, not by heap memory. This means all image data are registered at the Image Decoding Buffer. Although the basic buffer size is 256 KB, the Image Decoding Buffer is designed to handle data overflow, automatically expanding into the common space, which are shared by MMS and WAP. The limit, combined with the buffer’s 256 KB, is 430 KB. For more information on memory structure, please refer to “SGH-S100 Java Memory Features”.
When the 4,244 bytes image below is successively loaded, at least 23 24 images are registered. At this time, the images are stored at the Image Decoding Buffer, while image information data (about 20 bytes only) is loaded into heap memory.
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