1 files changed, 73 insertions, 0 deletions
diff --git a/plugins/vtx/ayemu_vtxfile.h b/plugins/vtx/ayemu_vtxfile.h
new file mode 100644
index 00000000..3856b45d
--- /dev/null
+++ b/plugins/vtx/ayemu_vtxfile.h
@@ -0,0 +1,73 @@
+#ifndef _AYEMU_vtxfile_h
+#define _AYEMU_vtxfile_h
+
+#include <stdio.h>
+#include <stdint.h>
+
+#include "ayemu_8912.h"
+
+BEGIN_C_DECLS
+
+/**
+ * \defgroup vtxfile Functions for extract data from vtx files
+ */
+/*@{*/
+
+/** structure for VTX file format handler
+ * \internal
+ * It stores VTX file header and current state
+ * (open file pointer, extracted register data, etc).
+ */
+typedef struct
+{
+  ayemu_chip_t chiptype;	/**< Type of sound chip */
+  int      stereo;		/**< Type of stereo: ABC, BCA,... */
+  int      loop;		/**< song loop */
+  int      chipFreq;		/**< AY chip freq (1773400 for ZX) */
+  int      playerFreq;		/**< 50 Hz for ZX, 60 Hz for yamaha */
+  int      year;		/**< year song composed */
+  char *title;			/**< song title  */
+  char *author;			/**< song author  */
+  char *from;			/**< song from */
+  char *tracker;		/**< tracker */
+  char *comment;		/**< comment */
+  int  regdata_size;	/**< size of unpacked data (need for unpack). */
+  unsigned char *regdata;		/**< unpacked song data */
+  size_t frames;		/**< number of AY data frames */
+} ayemu_vtx_t;
+
+
+/*! Load only header (song info) from vtx file.
+ * Purpose: read tags in play list.
+ */
+EXTERN ayemu_vtx_t * ayemu_vtx_header(const char *buf, size_t size);
+
+/*! Load song (header and unpack data). 
+ *
+ */
+EXTERN ayemu_vtx_t * ayemu_vtx_load(const char *buf, size_t size);
+
+EXTERN void ayemu_vtx_getframe(const ayemu_vtx_t *vtx, size_t frame_n,
+			       ayemu_ay_reg_frame_t regs);
+
+/** Free all allocaded data and structure itself.
+ * You must call this for any ayemu_vtx_t pointer allocated by this lib
+ * by functions ayemu_vtx_header() and ayemu_vtx_load().
+ */
+EXTERN void ayemu_vtx_free(ayemu_vtx_t *vtx);
+
+/*! Load song header from file.
+ * Helper (non-all platform) function
+ */
+EXTERN ayemu_vtx_t * ayemu_vtx_header_from_file(const char *filename);
+
+/*! Load song header and data from file.
+ * Helper (non-all platform) function
+ */
+EXTERN ayemu_vtx_t * ayemu_vtx_load_from_file(const char *filename);
+
+/*@}*/
+
+END_C_DECLS
+
+#endif