tvheadend/src/packet.h
2010-10-26 19:08:38 +00:00

107 lines
2.3 KiB
C

/*
* Packet nanagement
* Copyright (C) 2008 Andreas Öman
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#ifndef PACKET_H_
#define PACKET_H_
typedef struct pktbuf {
int pb_refcount;
uint8_t *pb_data;
size_t pb_size;
} pktbuf_t;
/**
* Packets
*/
#define PKT_I_FRAME 1
#define PKT_P_FRAME 2
#define PKT_B_FRAME 3
#define PKT_NTYPES 4
typedef struct th_pkt {
int64_t pkt_dts;
int64_t pkt_pts;
int pkt_duration;
int pkt_refcount;
uint8_t pkt_commercial;
uint8_t pkt_componentindex;
uint8_t pkt_frametype;
uint8_t pkt_field; // Set if packet is only a half frame (a field)
uint8_t pkt_channels;
uint8_t pkt_sri;
uint16_t pkt_aspect_num;
uint16_t pkt_aspect_den;
pktbuf_t *pkt_payload;
pktbuf_t *pkt_header;
} th_pkt_t;
/**
* A packet reference
*/
typedef struct th_pktref {
TAILQ_ENTRY(th_pktref) pr_link;
th_pkt_t *pr_pkt;
} th_pktref_t;
/**
*
*/
void pkt_ref_dec(th_pkt_t *pkt);
void pkt_ref_inc(th_pkt_t *pkt);
void pkt_ref_inc_poly(th_pkt_t *pkt, int n);
void pktref_clear_queue(struct th_pktref_queue *q);
// Reference count is transfered to queue
void pktref_enqueue(struct th_pktref_queue *q, th_pkt_t *pkt);
void pktref_remove(struct th_pktref_queue *q, th_pktref_t *pr);
th_pkt_t *pkt_alloc(const void *data, size_t datalen, int64_t pts, int64_t dts);
th_pkt_t *pkt_merge_header(th_pkt_t *pkt);
th_pkt_t *pkt_copy_shallow(th_pkt_t *pkt);
th_pktref_t *pktref_create(th_pkt_t *pkt);
void pktbuf_ref_dec(pktbuf_t *pb);
void pktbuf_ref_inc(pktbuf_t *pb);
pktbuf_t *pktbuf_alloc(const void *data, size_t size);
pktbuf_t *pktbuf_make(void *data, size_t size);
#define pktbuf_len(pb) ((pb)->pb_size)
#define pktbuf_ptr(pb) ((pb)->pb_data)
#endif /* PACKET_H_ */