www.pudn.com > ffmpeg_c.rar > rtp.h

/* 
 * RTP 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 RTP_H 
#define RTP_H 
 
#define RTP_MIN_PACKET_LENGTH 12 
#define RTP_MAX_PACKET_LENGTH 1500 /* XXX: suppress this define */ 
 
int rtp_init(void); 
int rtp_get_codec_info(AVCodecContext *codec, int payload_type); 
int rtp_get_payload_type(AVCodecContext *codec); 
 
typedef struct RTPDemuxContext RTPDemuxContext; 
typedef struct rtp_payload_data_s rtp_payload_data_s; 
RTPDemuxContext *rtp_parse_open(AVFormatContext *s1, AVStream *st, URLContext *rtpc, int payload_type, rtp_payload_data_s *rtp_payload_data); 
int rtp_parse_packet(RTPDemuxContext *s, AVPacket *pkt, 
                     const uint8_t *buf, int len); 
void rtp_parse_close(RTPDemuxContext *s); 
 
extern AVOutputFormat rtp_muxer; 
extern AVInputFormat rtp_demuxer; 
 
int rtp_get_local_port(URLContext *h); 
int rtp_set_remote_url(URLContext *h, const char *uri); 
void rtp_get_file_handles(URLContext *h, int *prtp_fd, int *prtcp_fd); 
int rtp_check_and_send_back_rr(RTPDemuxContext *s, int count); 
 
extern URLProtocol rtp_protocol; 
 
#define RTP_PT_PRIVATE 96 
#define RTP_VERSION 2 
#define RTP_MAX_SDES 256   /* maximum text length for SDES */ 
 
/* RTCP paquets use 0.5 % of the bandwidth */ 
#define RTCP_TX_RATIO_NUM 5 
#define RTCP_TX_RATIO_DEN 1000 
 
/* Structure listing usefull vars to parse RTP packet payload*/ 
typedef struct rtp_payload_data_s 
{ 
    int sizelength; 
    int indexlength; 
    int indexdeltalength; 
    int profile_level_id; 
    int streamtype; 
    int objecttype; 
    char *mode; 
 
    /* mpeg 4 AU headers */ 
    struct AUHeaders { 
        int size; 
        int index; 
        int cts_flag; 
        int cts; 
        int dts_flag; 
        int dts; 
        int rap_flag; 
        int streamstate; 
    } *au_headers; 
    int nb_au_headers; 
    int au_headers_length_bytes; 
    int cur_au_index; 
} rtp_payload_data_t; 
 
typedef struct AVRtpPayloadType_s 
{ 
    int pt; 
    const char enc_name[50]; /* XXX: why 50 ? */ 
    enum CodecType codec_type; 
    enum CodecID codec_id; 
    int clock_rate; 
    int audio_channels; 
} AVRtpPayloadType_t; 
 
#if 0 
typedef enum { 
  RTCP_SR   = 200, 
  RTCP_RR   = 201, 
  RTCP_SDES = 202, 
  RTCP_BYE  = 203, 
  RTCP_APP  = 204 
} rtcp_type_t; 
 
typedef enum { 
  RTCP_SDES_END    =  0, 
  RTCP_SDES_CNAME  =  1, 
  RTCP_SDES_NAME   =  2, 
  RTCP_SDES_EMAIL  =  3, 
  RTCP_SDES_PHONE  =  4, 
  RTCP_SDES_LOC    =  5, 
  RTCP_SDES_TOOL   =  6, 
  RTCP_SDES_NOTE   =  7, 
  RTCP_SDES_PRIV   =  8, 
  RTCP_SDES_IMG    =  9, 
  RTCP_SDES_DOOR   = 10, 
  RTCP_SDES_SOURCE = 11 
} rtcp_sdes_type_t; 
#endif 
 
extern AVRtpPayloadType_t AVRtpPayloadTypes[]; 
#endif /* RTP_H */