+/* a few sets of convenient callbacks, especially for use under
+ * Windows where ov_open_callbacks() should always be used instead of
+ * ov_open() to avoid problems with incompatible crt.o version linking
+ * issues. */
+
+static int _ov_header_fseek_wrap(FILE *f,ogg_int64_t off,int whence){
+ if(f==NULL)return(-1);
+
+#ifdef __MINGW32__
+ return fseeko64(f,off,whence);
+#elif defined (_WIN32)
+ return _fseeki64(f,off,whence);
+#else
+ return fseek(f,off,whence);
+#endif
+}
+
+/* These structs below (OV_CALLBACKS_DEFAULT etc) are defined here as
+ * static data. That means that every file which includes this header
+ * will get its own copy of these structs whether it uses them or
+ * not unless it #defines OV_EXCLUDE_STATIC_CALLBACKS.
+ * These static symbols are essential on platforms such as Windows on
+ * which several different versions of stdio support may be linked to
+ * by different DLLs, and we need to be certain we know which one
+ * we're using (the same one as the main application).
+ */
+
+static ov_callbacks OV_CALLBACKS_DEFAULT = {
+ (size_t (*)(void *, size_t, size_t, void *)) fread,
+ (int (*)(void *, ogg_int64_t, int)) _ov_header_fseek_wrap,
+ (int (*)(void *)) fclose,
+ (long (*)(void *)) ftell
+};
+
+static ov_callbacks OV_CALLBACKS_NOCLOSE = {
+ (size_t (*)(void *, size_t, size_t, void *)) fread,
+ (int (*)(void *, ogg_int64_t, int)) _ov_header_fseek_wrap,
+ (int (*)(void *)) NULL,
+ (long (*)(void *)) ftell
+};
+
+static ov_callbacks OV_CALLBACKS_STREAMONLY = {
+ (size_t (*)(void *, size_t, size_t, void *)) fread,
+ (int (*)(void *, ogg_int64_t, int)) NULL,
+ (int (*)(void *)) fclose,
+ (long (*)(void *)) NULL
+};
+
+static ov_callbacks OV_CALLBACKS_STREAMONLY_NOCLOSE = {
+ (size_t (*)(void *, size_t, size_t, void *)) fread,
+ (int (*)(void *, ogg_int64_t, int)) NULL,
+ (int (*)(void *)) NULL,
+ (long (*)(void *)) NULL
+};
+
+#endif
+
+#define NOTOPEN 0
+#define PARTOPEN 1
+#define OPENED 2
+#define STREAMSET 3
+#define INITSET 4
+
+typedef struct OggVorbis_File {
+ void *datasource; /* Pointer to a FILE *, etc. */