+#ifndef __videoreader_t__
+#define __videoreader_t__
+
+#define videoreader_getsamples(v, buffer, num) ((v)->getsamples((v),(buffer),(num)))
+#define videoreader_getimage(v, buffer) ((v)->getimage((v),(buffer)))
+#define videoreader_eof(v) ((v)->eof(v))
+#define videoreader_setparameter(v,name,value) ((v)->setparameter((v),(name),(value)))
+#define videoreader_close(v) ((v)->close(v))
+
+typedef struct _videoreader_t
+{
+ void*internal;
+
+ /* video */
+ int width;
+ int height;
+ double fps;
+
+ /* audio */
+ int channels;
+ int rate;
+
+ void (*setparameter) (struct _videoreader_t*, char*name, char*value);
+ int (*getsamples) (struct _videoreader_t*, void*buffer, int num);
+ int (*getimage) (struct _videoreader_t*, void*buffer); // buffer must hold width*height*4 bytes
+ bool (*eof) (struct _videoreader_t*);
+ void (*close) (struct _videoreader_t*);
+
+} videoreader_t;
+
+
+#endif