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#ifdef WIN32
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <Mmsystem.h>
#endif
#define NEED_STRHDL // for STRHTL struct in audiostr.h
#include "cfile/cfile.h"
#include "sound/ogg/ogg.h"
#include "sound/audiostr.h"
int ogg_inited = 0;
ov_callbacks cfile_callbacks;
ov_callbacks mmio_callbacks;
//Encapsulation funcs to please the almighty ov_callbacks struct
size_t ogg_cfread(void *buf, size_t elsize, size_t elnem, void* cfile)
{
return cfread(buf, elsize, elnem, (CFILE*)cfile);
}
int ogg_cfseek(void* cfile, ogg_int64_t offset, int where)
{
return cfseek((CFILE*)cfile, (int) offset, where);
}
int ogg_cfclose(void* cfile)
{
// we don't close here so that it's safe to do it ourselves
return 0;
}
long ogg_cftell(void* cfile)
{
return cftell((CFILE*) cfile);
}
size_t ogg_mmio_read(void *buf, size_t elsize, size_t elnem, void* mmfp)
{
STRHDL *hdl = (STRHDL*)mmfp;
return mmioRead(hdl->cfp, (HPSTR) buf, elsize * elnem);
}
int ogg_mmio_seek(void* mmfp, ogg_int64_t offset, int where)
{
STRHDL *hdl = (STRHDL*)mmfp;
long rc = 0, cur_offset = 0;
switch (where) {
case SEEK_CUR:
{
cur_offset = mmioSeek(hdl->cfp, 0, SEEK_CUR);
if ( (cur_offset + offset) > (hdl->true_offset + hdl->size) )
return -1;
rc = mmioSeek(hdl->cfp, cur_offset + (long)offset, SEEK_SET);
break;
}
case SEEK_SET:
{
if ( offset > hdl->size )
return -1;
rc = mmioSeek(hdl->cfp, hdl->true_offset + (long)offset, SEEK_SET);
break;
}
case SEEK_END:
{
rc = mmioSeek(hdl->cfp, hdl->true_offset + hdl->size, SEEK_SET);
break;
}
}
if ( rc < 0 )
return -1;
rc -= hdl->true_offset;
return (int)rc;
}
int ogg_mmio_close(void* mmfp)
{
// we don't close here so that it's safe to do it ourselves
return 0;
}
long ogg_mmio_tell(void* mmfp)
{
STRHDL *hdl = (STRHDL*)mmfp;
return (mmioSeek(hdl->cfp, 0, SEEK_CUR) - hdl->true_offset);
}
int OGG_init()
{
//Setup the cfile_callbacks stucts
cfile_callbacks.read_func = ogg_cfread;
cfile_callbacks.seek_func = ogg_cfseek;
cfile_callbacks.close_func = ogg_cfclose;
cfile_callbacks.tell_func = ogg_cftell;
mmio_callbacks.read_func = ogg_mmio_read;
mmio_callbacks.seek_func = ogg_mmio_seek;
mmio_callbacks.close_func= ogg_mmio_close;
mmio_callbacks.tell_func = ogg_mmio_tell;
return 0;
}
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