bufferpool.h

linuxUNIX下跑的一套服务端程序

/* * 
 *  $Id: bufferpool.h 128 2005-04-29 11:07:58Z shawill $
 *  
 *  This file is part of Fenice
 *
 *  Fenice -- Open Media Server
 *
 *  Copyright (C) 2004 by
 *  	
 *	- Giampaolo Mancini	<[e-mail]>
 *	- Francesco Varano	<[e-mail]>
 *	- Marco Penno		<[e-mail]>
 *	- Federico Ridolfo	<[e-mail]>
 *	- Eugenio Menegatti 	<[e-mail]>
 *	- Stefano Cau
 *	- Giuliano Emma
 *	- Stefano Oldrini
 * 
 *  Fenice 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.
 *
 *  Fenice 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 Fenice; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *  
 * */

#ifndef _BUFFERPOOLH
#define _BUFFERPOOLH

#include <fenice/types.h>
// #include <pthread.h>
#include <stdlib.h>

#define omsbuff_min(x,y) ((x) < (y) ? (x) : (y))

#define OMSSLOT_DATASIZE 65000
#define OMSSLOT_COMMON	uint16 refs; \
			uint64 slot_seq; /* monotone identifier of slot (NOT RTP seq) */ \
			double timestamp; \
			uint8 data[OMSSLOT_DATASIZE]; \
			uint32 data_size; \
			uint8 marker; \
			struct _OMSslot *next;


typedef struct  _OMSslot {
#if 0
	uint16 refs; /*!  n.Consumers that must read slot*/
	uint32 timestamp;
	uint8 *data;
	struct _OMSslot *next;
#endif
	OMSSLOT_COMMON
} OMSSlot;

typedef struct _OMSslot_added {
	OMSSLOT_COMMON
	struct _OMSslot_added *next_added;
} OMSSlotAdded;
	
typedef struct _OMSbuffer {
	uint16 refs;  /*! n.Consumers that share the buffer*/
	OMSSlot *buffer_head; /*! Buffer head*/
	uint32 min_size;
	OMSSlot *write_pos; /*! last write position*/
	// int *fd; /*! pointer to File descriptor of incoming data*/ // XXX: currently not used
	OMSSlotAdded *added_head; /* internal queue: not to be handled */
} OMSBuffer;

typedef struct _OMSconsumer {
	OMSSlot *read_pos; /*! read position*/
	OMSSlot *last_read_pos; /*! last read position . used for managing the slot addition*/
	uint64 last_seq;
	OMSBuffer *buffer;
	int32 frames;
	// pthread_mutex_t mutex;
} OMSConsumer;

#if 0
typedef struct _OMSproducer {
	OMSSlot *write_pos; /*! write position*/
	OMSBuffer *buffer;
} OMSProducer;
#endif

/*! API definitions*/
OMSBuffer *OMSbuff_new(uint32);
OMSConsumer *OMSbuff_ref(OMSBuffer *);
void OMSbuff_unref(OMSConsumer *);
int32 OMSbuff_read(OMSConsumer *, uint32 *, uint8 *, uint8 *, uint32 *);
OMSSlot *OMSbuff_getreader(OMSConsumer *);
int32 OMSbuff_gotreader(OMSConsumer *);
int32 OMSbuff_write(OMSBuffer *, uint32, uint8, uint8 *, uint32);
OMSSlot *OMSbuff_getslot(OMSBuffer *);
OMSSlot *OMSbuff_slotadd(OMSBuffer *, OMSSlot *);
void OMSbuff_free(OMSBuffer *);

int OMSbuff_isempty(OMSConsumer *);
double OMSbuff_nextts(OMSConsumer *);

#endif