dxhead.h
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上传日期:2013-07-19
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- /* ***** BEGIN LICENSE BLOCK *****
- * Version: RCSL 1.0/RPSL 1.0
- *
- * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved.
- *
- * The contents of this file, and the files included with this file, are
- * subject to the current version of the RealNetworks Public Source License
- * Version 1.0 (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the RealNetworks Community Source License Version 1.0
- * (the "RCSL") available at http://www.helixcommunity.org/content/rcsl,
- * in which case the RCSL will apply. You may also obtain the license terms
- * directly from RealNetworks. You may not use this file except in
- * compliance with the RPSL or, if you have a valid RCSL with RealNetworks
- * applicable to this file, the RCSL. Please see the applicable RPSL or
- * RCSL for the rights, obligations and limitations governing use of the
- * contents of the file.
- *
- * This file is part of the Helix DNA Technology. RealNetworks is the
- * developer of the Original Code and owns the copyrights in the portions
- * it created.
- *
- * This file, and the files included with this file, is distributed and made
- * available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS
- * FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- *
- * Technology Compatibility Kit Test Suite(s) Location:
- * http://www.helixcommunity.org/content/tck
- *
- * Contributor(s):
- *
- * ***** END LICENSE BLOCK ***** */
- #define FRAMES_FLAG 0x0001
- #define BYTES_FLAG 0x0002
- #define TOC_FLAG 0x0004
- #define VBR_SCALE_FLAG 0x0008
- #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 Xing header data
- int frames; // total bit stream frames from Xing header data
- int bytes; // total bit stream bytes from Xing header data
- int vbr_scale; // encoded vbr scale from Xing header data
- unsigned char *toc; // pointer to unsigned char toc_buffer[100]
- // may be NULL if toc not desired
- } XHEADDATA;
- #ifdef __cplusplus
- extern "C" {
- #endif
- int GetXingHeader(XHEADDATA *X, unsigned char *buf);
- // return 0=fail, 1=success
- // X structure to receive header data (output)
- // buf bitstream input
- int SeekPoint(unsigned char TOC[100], int file_bytes, float percent); /* Flawfinder: ignore */
- // return seekpoint in bytes (may be at eof if percent=100.0)
- // TOC = table of contents from Xing header
- // file_bytes = number of bytes in mp3 file
- // percent = play time percentage of total playtime. May be
- // fractional (e.g. 87.245)
- #ifdef __cplusplus
- }
- #endif