+/*
+ * Xing VBR tagging for LAME.
+ *
+ * Copyright (c) 1999 A.L. Faber
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifndef LAME_VRBTAG_H
+#define LAME_VRBTAG_H
+#include "lame.h"
+/* -----------------------------------------------------------
+ * A Vbr header may be present in the ancillary
+ * data field of the first frame of an mp3 bitstream
+ * The Vbr header (optionally) contains
+ * frames total number of audio frames in the bitstream
+ * bytes total number of bytes in the bitstream
+ * toc table of contents
+
+ * toc (table of contents) gives seek points
+ * for random access
+ * the ith entry determines the seek point for
+ * i-percent duration
+ * seek point in bytes = (toc[i]/256.0) * total_bitstream_bytes
+ * e.g. half duration seek point = (toc[50]/256.0) * total_bitstream_bytes
+ */
+
+
+#define FRAMES_FLAG 0x0001
+#define BYTES_FLAG 0x0002
+#define TOC_FLAG 0x0004
+#define VBR_SCALE_FLAG 0x0008
+
+#define NUMTOCENTRIES 100
+
+#define FRAMES_AND_BYTES (FRAMES_FLAG | BYTES_FLAG)
+
+
+
+/*structure to receive extracted header */
+/* toc may be NULL*/
+typedef struct
+{
+ int h_id; /* from MPEG header, 0=MPEG2, 1=MPEG1 */
+ int samprate; /* determined from MPEG header */
+ int flags; /* from Vbr header data */
+ int frames; /* total bit stream frames from Vbr header data */
+ int bytes; /* total bit stream bytes from Vbr header data*/
+ int vbr_scale; /* encoded vbr scale from Vbr header data*/
+ unsigned char toc[NUMTOCENTRIES]; /* may be NULL if toc not desired*/
+ int headersize; /* size of VBR header, in bytes */
+ int enc_delay; /* encoder delay */
+ int enc_padding; /* encoder paddign added at end of stream */
+} VBRTAGDATA;
+
+int CheckVbrTag(unsigned char *buf);
+int GetVbrTag(VBRTAGDATA *pTagData, unsigned char *buf);
+
+int SeekPoint(unsigned char TOC[NUMTOCENTRIES], int file_bytes, float percent);
+int InitVbrTag(lame_global_flags *gfp);
+int PutVbrTag(lame_global_flags *gfp,FILE *fid,int nVbrScale);
+int PutLameVBR(lame_global_flags *gfp, FILE *fpStream, uint8_t *pbtStreamBuffer, uint32_t id3v2size, uint16_t crc);
+void AddVbrFrame(lame_global_flags *gfp);
+void ReportLameTagProgress(lame_global_flags *gfp,int nStart);
+void UpdateMusicCRC(uint16_t *crc,unsigned char *buffer, int size);
+
+#endif