[vorbis] Is this a bug in ogg ?

[Andre Krause]

I have a problem i suspect to be a bug in ogg:

Assume i have a simple archive "chou_s_test1_test2.pak", created by simply
concatenating binary files together:

chou_s.jpg (3403 bytes)
test1.ogg (5196 bytes)
test2.ogg (6128 bytes)

If i place the a filepointer passed to ov_open to the beginning of
test1.ogg, this ogg gets opened and decoded correctly. But if i place it to
the beginning of test2.ogg, ov_open returns error code -123 (OV_EBADLINK ).
Any idea ?

Here is the source code i encounter the problem with:
( you can download a zip file with the ogg files i used here:
http://www.videofiles.de/ogg_bug.zip )

<p>#include<stdio.h>
#include <vorbis/vorbisfile.h>

int main(int argc, char *argv[])
{

        OggVorbis_File vf;
        FILE *fp=NULL;
        // chou_s_test1_test2.pak is created by simply concatenating
chou_s.jpg (3403 bytes), test1.ogg (5196 bytes) and test2.ogg (6128 bytes)
        fp=fopen("chou_s_test1_test2.pak","rb");

        //fseek(fp,3403, SEEK_SET); // place to the beginning of test1.ogg
        fseek(fp,3403 + 5196,SEEK_SET); // place to the beginning of
test2.ogg

        fprintf(stderr, " ov_open_return_code:%i\n",ov_open(fp, &vf, NULL,
0));

        int xx = ov_raw_total(&vf,-1);
        int yy =  (long)ov_pcm_total(&vf, -1);
        printf("oggtotalraw:%i",xx);
        printf("oggtotalpcm:%i",yy);
}

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