OGGTemplate.bt

//--------------------------------------
//--- 010 Editor v4.0.4 Binary Template
//
// File:     OGGTemplate.bt
// Author:   George Woods
// Revision: 
// Purpose:  Parses the ogg container format.
//--------------------------------------

// ogg files can be quite large. Don't read more the 1000 pages.
local uint MAXPAGES = 1000;

typedef struct {   // bmfh
    CHAR    CapturePattern[4];
    BYTE    Version;
    BYTE    HeaderType;
    QUAD    GranulePosition;
    DWORD   BitstreamSerial;
    DWORD   PageSequenceNumber;
    DWORD   Checksum;
    UBYTE   PageSegments;

    // the lengths of the segments that follow
    UBYTE   SegmentLen[PageSegments];
    
    // the segments themselves
    local uint i;
    for (i = 0; i < PageSegments; i++) {
        struct {
            BYTE Data[SegmentLen[i]] <bgcolor=cLtGray>;
        } Segment;
    }
} PAGE;


LittleEndian(); 

local uint currpage = 0;
while( !FEof() )
{
    currpage++;
    if (MAXPAGES < currpage) 
    {
        Printf("Max Pages of %d reached!\n", maxpages);
        return 0;
    }

    PAGE page <bgcolor=cLtBlue>;
    
    // Check for valid header
    if( page.CapturePattern != "OggS" )
    {
        Warning( "File is not a valid ogg file. Template stopped." );
        return -1;
    }
}