User:Halftheisland/EA AS4
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Description
AS4 / ASF files are an audio file format used in many video games created by Electronic Arts. Note that extensions other than those listed may be AS4 / ASF files as Electronic Arts often change file extensions for different games.
Information
The basic structure of AS4 / ASF files is similar to that of RIFF, with each file divided into blocks (although, unlike RIFF, the format does not have a global file header).
Each block starts with a standard header:
struct ASFBlockHeader
{
char szBlockID[4];
DWORD dwSize;
};
Where:
-
szBlockID
gives the string ID for the block -
dwSize
gives the size of the block (including the header) in bytes.
Each file then consists of a number of blocks, each of which are described below.
