[vorbis] Streaming ogg from filepointer pointing to archive of many oggs. Ogg stream does not stop after end of one ogg file - what to do ?

[Andre Krause]

Hello,
I'm currently trying to implement streaming off ogg-files out of an archive
file using SDL and SDL_mixer for playback. Therefore i create a FILE *
filepointer, place it to the beginning of an ogg file inside the archive and
hand over the filepointer to ov_open. ( command: ov_open(fp, &music->vf,
NULL, 0) ). This works fine so far. The problem is: if i put many oggs
together in one archive, the playback stops only after the last ogg file.
Why is this a problem ? Suppose i want to play the ogg files in random
order. The playback must end after the current ogg, so the user can select a
random new ogg file, place the filepointer to it and play the ogg. 

So is there a method to determine when one ogg file ended and the other
begins ?

Current code looks like this:

/* Load an OGG stream from the given file pointer */
OGG_music *OGG_new(FILE *fp)
{
        OGG_music *music;int xx;

        music = (OGG_music *)malloc(sizeof *music);
        if ( music ) {
                /* Initialize the music structure */
                memset(music, 0, (sizeof *music));
                OGG_stop(music);
                OGG_setvolume(music, MIX_MAX_VOLUME);
                music->section = -1;

                if ( ov_open(fp, &music->vf, NULL, 0) < 0 ) {
                        SDL_SetError("Not an Ogg Vorbis audio stream");
                        free(music);
                        return(NULL);
.....

<p>And playing the ogg:

/* Read some Ogg stream data and convert it for output */
static void OGG_getsome(OGG_music *music)
{
        int section;
        int len;
        char data[4096];
        SDL_AudioCVT *cvt;

        len = ov_read(&music->vf, data, sizeof(data), 0, 2, 1, &section);
        if ( len <= 0 ) {
                if ( len == 0 ) {
                        music->playing = 0;
                }
                return;
        }
.....

<p><p>Any idea please ?

Thanks, andre

<p><p><p>_________________________________________
Andre Krause
Dipl. Inform.
Department of Biological Cybernetics
Faculty of Biology
University of Bielefeld
PO Box 10 01 31
33501 Bielefeld
Germany

Phone: +49-521-106-5519
Mobil: +49-177-7465055
Home : +49-521-3044776

Email: post at andre-krause.net

ICQ# : 68306404
More ways to contact me: http://wwp.icq.com/68306404

Homepage: http://www.andre-krause.net
http://www.andre-krause.de
_________________________________________
War isn't politics, my dear. It is indeed he only human activity that is
rottener than politics. RexStout
_________________________________________

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