/* *	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 VRBTAG_H_INCLUDED#define VRBTAG_H_INCLUDED#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*/  u_char	toc[NUMTOCENTRIES];	/* may be NULL if toc not desired*/}   VBRTAGDATA;/*//    4 bytes for Header Tag//    4 bytes for Header Flags//  100 bytes for entry (NUMTOCENTRIES)//    4 bytes for FRAME SIZE//    4 bytes for STREAM_SIZE//    4 bytes for VBR SCALE. a VBR quality indicator: 0=best 100=worst//   20 bytes for LAME tag.  for example, "LAME3.12 (beta 6)"// ___________//  140 bytes*/#define VBRHEADERSIZE (NUMTOCENTRIES+4+4+4+4+4)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,char* lpszFileName,int nVbrScale);void AddVbrFrame(lame_global_flags *gfp);#endif