libavformat/rtsp.h

Go to the documentation of this file.

/*
 * RTSP definitions
 * Copyright (c) 2002 Fabrice Bellard
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */
#ifndef FFMPEG_RTSP_H
#define FFMPEG_RTSP_H

#include <stdint.h>
#include "avformat.h"
#include "rtspcodes.h"
#include "rtpdec.h"
#include "network.h"

enum RTSPLowerTransport {
    RTSP_LOWER_TRANSPORT_UDP = 0,           
    RTSP_LOWER_TRANSPORT_TCP = 1,           
    RTSP_LOWER_TRANSPORT_UDP_MULTICAST = 2, 
    RTSP_LOWER_TRANSPORT_NB
};

enum RTSPTransport {
    RTSP_TRANSPORT_RTP, 
    RTSP_TRANSPORT_RDT, 
    RTSP_TRANSPORT_NB
};

#define RTSP_DEFAULT_PORT   554
#define RTSP_MAX_TRANSPORTS 8
#define RTSP_TCP_MAX_PACKET_SIZE 1472
#define RTSP_DEFAULT_NB_AUDIO_CHANNELS 2
#define RTSP_DEFAULT_AUDIO_SAMPLERATE 44100
#define RTSP_RTP_PORT_MIN 5000
#define RTSP_RTP_PORT_MAX 10000

typedef struct RTSPTransportField {
    int interleaved_min, interleaved_max;

    int port_min, port_max;

    int client_port_min, client_port_max;

    int server_port_min, server_port_max;

    int ttl;

    uint32_t destination; 
    enum RTSPTransport transport;

    enum RTSPLowerTransport lower_transport;
} RTSPTransportField;

typedef struct RTSPMessageHeader {
    int content_length;

    enum RTSPStatusCode status_code; 
    int nb_transports;

    int64_t range_start, range_end;

    RTSPTransportField transports[RTSP_MAX_TRANSPORTS];

    int seq;                         
    char session_id[512];

    char real_challenge[64];

    char server[64];
} RTSPMessageHeader;

enum RTSPClientState {
    RTSP_STATE_IDLE,    
    RTSP_STATE_PLAYING, 
    RTSP_STATE_PAUSED,  
};

enum RTSPServerType {
    RTSP_SERVER_RTP,  
    RTSP_SERVER_REAL, 
    RTSP_SERVER_WMS,  
    RTSP_SERVER_NB
};

typedef struct RTSPState {
    URLContext *rtsp_hd; /* RTSP TCP connexion handle */

    int nb_rtsp_streams;

    struct RTSPStream **rtsp_streams; 
    enum RTSPClientState state;

    int64_t seek_timestamp;

    /* XXX: currently we use unbuffered input */
    //    ByteIOContext rtsp_gb;

    int seq;                          
    char session_id[512];

    enum RTSPTransport transport;

    enum RTSPLowerTransport lower_transport;

    enum RTSPServerType server_type;

    char last_reply[2048]; /* XXX: allocate ? */

    void *cur_transport_priv;

    int need_subscription;

    enum AVDiscard real_setup_cache[MAX_STREAMS];

    char last_subscription[1024];
} RTSPState;

typedef struct RTSPStream {
    URLContext *rtp_handle;   
    void *transport_priv; 
    int stream_index;

    int interleaved_min, interleaved_max;

    char control_url[1024];   
    int sdp_port;             
    struct in_addr sdp_ip;    
    int sdp_ttl;              
    int sdp_payload_type;     

    RTPPayloadData rtp_payload_data;

    RTPDynamicProtocolHandler *dynamic_handler;

    PayloadContext *dynamic_protocol_context;
} RTSPStream;

int rtsp_init(void);
void rtsp_parse_line(RTSPMessageHeader *reply, const char *buf);

#if LIBAVFORMAT_VERSION_INT < (53 << 16)
extern int rtsp_default_protocols;
#endif
extern int rtsp_rtp_port_min;
extern int rtsp_rtp_port_max;

int rtsp_pause(AVFormatContext *s);
int rtsp_resume(AVFormatContext *s);

#endif /* FFMPEG_RTSP_H */

---