libavformat/rtsp.h

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/*
 * 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 AVFORMAT_RTSP_H
#define AVFORMAT_RTSP_H

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

#include "libavutil/log.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
};

enum RTSPControlTransport {
    RTSP_MODE_PLAIN,   
    RTSP_MODE_TUNNEL   
};

#define RTSP_DEFAULT_PORT   554
#define RTSP_MAX_TRANSPORTS 8
#define RTSP_TCP_MAX_PACKET_SIZE 1472
#define RTSP_DEFAULT_NB_AUDIO_CHANNELS 1
#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;

    struct sockaddr_storage destination; 
    char source[INET6_ADDRSTRLEN + 1]; 
    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 location[4096];

    char real_challenge[64];

    char server[64];

    int timeout;

    int notice;

    char reason[256];
} RTSPMessageHeader;

enum RTSPClientState {
    RTSP_STATE_IDLE,    
    RTSP_STATE_STREAMING, 
    RTSP_STATE_PAUSED,  
    RTSP_STATE_SEEKING, 
};

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

typedef struct RTSPState {
    const AVClass *class;             
    URLContext *rtsp_hd; /* RTSP TCP connection handle */

    int nb_rtsp_streams;

    struct RTSPStream **rtsp_streams; 
    enum RTSPClientState state;

    int64_t seek_timestamp;

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

    int seq;                          
    char session_id[512];

    int timeout;

    int64_t last_cmd_time;

    enum RTSPTransport transport;

    enum RTSPLowerTransport lower_transport;

    enum RTSPServerType server_type;

    char real_challenge[64];

    char auth[128];

    HTTPAuthState auth_state;

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

    void *cur_transport_priv;

    int need_subscription;

    enum AVDiscard *real_setup_cache;

    enum AVDiscard *real_setup;

    char last_subscription[1024];

    AVFormatContext *asf_ctx;

    uint64_t asf_pb_pos;

    char control_uri[1024];

    URLContext *rtsp_hd_out;

    enum RTSPControlTransport control_transport;

    /* Number of RTCP BYE packets the RTSP session has received.
     * An EOF is propagated back if nb_byes == nb_streams.
     * This is reset after a seek. */
    int nb_byes;

    uint8_t* recvbuf;

    int filter_source;

    int lower_transport_mask;

    uint64_t packets;

    struct pollfd *p;

    int get_parameter_supported;

    int initial_pause;

    int rtp_muxer_flags;
} 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 sockaddr_storage sdp_ip; 
    int sdp_ttl;              
    int sdp_payload_type;     

    RTPDynamicProtocolHandler *dynamic_handler;

    PayloadContext *dynamic_protocol_context;
} RTSPStream;

void ff_rtsp_parse_line(RTSPMessageHeader *reply, const char *buf,
                        RTSPState *rt, const char *method);

extern int rtsp_rtp_port_min;
extern int rtsp_rtp_port_max;

int ff_rtsp_send_cmd_async(AVFormatContext *s, const char *method,
                           const char *url, const char *headers);

int ff_rtsp_send_cmd_with_content(AVFormatContext *s,
                                  const char *method, const char *url,
                                  const char *headers,
                                  RTSPMessageHeader *reply,
                                  unsigned char **content_ptr,
                                  const unsigned char *send_content,
                                  int send_content_length);

int ff_rtsp_send_cmd(AVFormatContext *s, const char *method,
                     const char *url, const char *headers,
                     RTSPMessageHeader *reply, unsigned char **content_ptr);

int ff_rtsp_read_reply(AVFormatContext *s, RTSPMessageHeader *reply,
                       unsigned char **content_ptr,
                       int return_on_interleaved_data, const char *method);

void ff_rtsp_skip_packet(AVFormatContext *s);

int ff_rtsp_connect(AVFormatContext *s);

void ff_rtsp_close_streams(AVFormatContext *s);

void ff_rtsp_close_connections(AVFormatContext *rt);

int ff_rtsp_setup_input_streams(AVFormatContext *s, RTSPMessageHeader *reply);

int ff_rtsp_setup_output_streams(AVFormatContext *s, const char *addr);

int ff_sdp_parse(AVFormatContext *s, const char *content);

int ff_rtsp_tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
                            uint8_t *buf, int buf_size);

int ff_rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt);

int ff_rtsp_make_setup_request(AVFormatContext *s, const char *host, int port,
                               int lower_transport, const char *real_challenge);

void ff_rtsp_undo_setup(AVFormatContext *s);

#endif /* AVFORMAT_RTSP_H */

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