audiobuffer.h

从 IEEE 1394总线接收传输流

/*
 * MPEG2-TS over IEEE 1394 decoder - receive and decode MPEG-2 transport
 *                                   streams according to IEC 61883-4
 *
 * Copyright (C) 2000-2007, Manfred Weihs <[e-mail]>
 *
 * 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
 */

#ifndef AUDIOBUFFER_H
#define AUDIOBUFFER_H


#include <semaphore.h>
#include "mpg123.h"

#define MAXFRAMESIZE 1792
#define AUDIOFRAMESINBUFFER 200


struct audiobuffer_entry {
	int havepts;
	unsigned long long pts;
	int ssize;
	struct frame fr;
	unsigned char buffer[MAXFRAMESIZE+512];
};


extern struct audiobuffer_entry audiobuffer[AUDIOFRAMESINBUFFER];
extern volatile int audiobufferstart,audiobufferend;
extern sem_t audiobuffer_sem;


int audio_system_init();
int audio_system_done();


extern int do_layer1(struct frame *,int,struct audio_info_struct *);
extern int do_layer2(struct frame *,int,struct audio_info_struct *);
extern int do_layer3(struct frame *,int,struct audio_info_struct *);


#endif