util.h

可以播放MP3,wma等文件格式的播放器

/* util.h
 *
 * $Id: util.h,v 1.4 2002/03/16 19:53:19 kyllingstad Exp $
 *
 * Apollo sound player: http://www.apolloplayer.org
 * Copyright(C) 2000-2002 Apollo Team.  See CREDITS file.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * The GNU General Public License is also available online at:
 *
 * http://www.gnu.org/copyleft/gpl.html
 */

/*! some utility functions */

class QString;

void secondsToTimeString(long seconds, QString &time);


/*!
  `fullScanVbr' means reading through the whole file iff it's
  encoded with variable bitrate.  Slow and unnecessary.
*/

int getMp3LengthInSeconds(const QString &path, bool fullScanVbr=false);


///////////////////////////////////////////////////////////////////////////
/// functions from mp3info - http://www.ibiblio.org/mp3info ///////////////
///////////////////////////////////////////////////////////////////////////

/*     Copyright (C) 2000-2001  Cedric Tefft <[e-mail]>     */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/stat.h>
#include <ctype.h>
#include <string.h>

/* MIN_CONSEC_GOOD_FRAMES defines how many consecutive valid MP3 frames
   we need to see before we decide we are looking at a real MP3 file */
#define MIN_CONSEC_GOOD_FRAMES 4
#define FRAME_HEADER_SIZE 4
#define MIN_FRAME_SIZE 21
#define NUM_SAMPLES 4

enum VBR_REPORT { VBR_VARIABLE, VBR_AVERAGE, VBR_MEDIAN };
enum SCANTYPE { SCAN_NONE, SCAN_QUICK, SCAN_FULL };

typedef struct {
	unsigned long	sync;
	unsigned int	version;
	unsigned int	layer;
	unsigned int	crc;
	unsigned int	bitrate;
	unsigned int	freq;
	unsigned int	padding;
	unsigned int	extension;
	unsigned int	mode;
	unsigned int	mode_extension;
	unsigned int	copyright;
	unsigned int	original;
	unsigned int	emphasis;
} mp3header;

typedef struct {
	char title[31];
	char artist[31];
	char album[31];
	char year[5];
	char comment[31];
	unsigned char track[1];
	unsigned char genre[1];
} id3tag;

typedef struct {
	char *filename;
	FILE *file;
	off_t datasize;
	int header_isvalid;
	mp3header header;
	int id3_isvalid;
	id3tag id3;
	int vbr;
	float vbr_average;
	int seconds;
	int frames;
	int badframes;
} mp3info;

int get_header(FILE *file,mp3header *header);
int frame_length(mp3header *header);
int header_layer(mp3header *h);
int header_bitrate(mp3header *h);
int sameConstant(mp3header *h1, mp3header *h2);
int get_mp3_info(mp3info *mp3,int scantype, int fullscan_vbr);
int get_id3(mp3info *mp3);
char *unpad(char *string);
int header_frequency(mp3header *h);
char *header_emphasis(mp3header *h);
char *header_mode(mp3header *h);
int get_first_header(mp3info *mp3,long startpos);
int get_next_header(mp3info *mp3);

///////////////////////////////////////////////////////////////////////////
/// end of functions from mp3info - http://www.ibiblio.org/mp3info ////////
///////////////////////////////////////////////////////////////////////////