rtsp_client.h

MPEG-4编解码的实现(包括MPEG4视音频编解码)

/*
 * The contents of this file are subject to the Mozilla Public
 * License Version 1.1 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
 * the License at http://www.mozilla.org/MPL/
 * 
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 * 
 * The Original Code is MPEG4IP.
 * 
 * The Initial Developer of the Original Code is Cisco Systems Inc.
 * Portions created by Cisco Systems Inc. are
 * Copyright (C) Cisco Systems Inc. 2000, 2001.  All Rights Reserved.
 * 
 * Contributor(s): 
 *              Bill May        [e-mail]
 */
/*
 * rtsp_client.h - API for generic RTSP client
 */
#ifndef __RTSP_CLIENT_H__
#define __RTSP_CLIENT_H__ 1

#include "systems.h"

#ifdef __cplusplus
extern "C" {
#endif

/*
 * rtsp_command_t.  Structure that contains information required by
 * RTSP for headers when sending commands.  For most commands, 1 or
 * more fields are required to be set.  See prototypes for individual
 * commands for which fields are required.
 */
typedef struct rtsp_command_t {
  char *accept;
  char *accept_encoding;
  char *accept_language;
  char *authorization;
  uint32_t bandwidth;
  uint32_t blocksize;
  char *cachecontrol;
  char *conference;
  char *connection;
  char *from;
  char *proxyauth;
  char *proxyrequire;
  char *range;
  char *referer;
  double scale;
  char *session;
  double speed;
  char *transport;
  char *useragent;
  char *User;
} rtsp_command_t;

/*
 * rtsp_decode_t.  Structure containing information about the response
 * from a RTSP command.  Some information will be required by application.
 * User can move string memory from this structure, but must free memory
 * after using it.  Make sure to set field to NULL for memory moved from
 * this structure.
 * User must call free_decode_response when completed
 */
typedef struct rtsp_decode_t {
  uint32_t content_length;
  uint32_t cseq;
  int close_connection;
  char retcode[4];         /* 3 byte return code - \0 delimited */
  char *retresp;
  char *body;              /* Contains body returned */
  char *accept;
  char *accept_encoding;
  char *accept_language;
  char *allow_public;
  char *authorization;
  char *bandwidth;
  char *blocksize;
  char *cache_control;
  char *content_base;
  char *content_encoding;
  char *content_language;
  char *content_location;
  char *content_type;
  char *cookie;
  char *date;
  char *expires;
  char *from;
  char *if_modified_since;
  char *last_modified;
  char *location;
  char *proxy_authenticate;
  char *proxy_require;
  char *range;
  char *referer;
  char *require;
  char *retry_after;
  char *rtp_info;
  char *scale;
  char *server;
  char *session;
  char *speed;
  char *transport;
  char *unsupported;
  char *user_agent;
  char *via;
  char *www_authenticate;
} rtsp_decode_t;

/*
 * rtsp_client_t - handle for client session.  Will remain same through
 * redirects.
 */
typedef struct rtsp_client_ rtsp_client_t;
  
/*
 * rtsp_session_t - handle for sessions created with a client.  A session
 * is defined as an stream - audio, video or other.
 */
typedef struct rtsp_session_ rtsp_session_t;

  struct rtp_packet;
  
typedef void (*rtp_callback_f)(void *,
			       unsigned char interleaved,
			       struct rtp_packet *,
			       int len);
/*
 * free_decode_response - call this after the decode response has been
 * used.  It will free all memory under it.
 */
void free_decode_response(rtsp_decode_t *decode);

/*
 * free_rtsp_client - call this after session has been closed to free
 * all memory allocated by the client
 */
void free_rtsp_client(rtsp_client_t *info);

/*
 * rtsp_create_client - create RTSP client.
 * Input - url - url to connect to.
 *         err - pointer to error value (only when return value is NULL)
 *               values should be errno values
 * Output - pointer to rtsp_client handle
 */
rtsp_client_t *rtsp_create_client(const char *url, int *err);
rtsp_client_t *rtsp_create_client_for_rtp_tcp(const char *url,
					      int *err);

  typedef int (*rtsp_thread_callback_f)(void *);

  int rtsp_thread_perform_callback(rtsp_client_t *info,
				   rtsp_thread_callback_f func,
				   void *ud);
int rtsp_thread_set_rtp_callback(rtsp_client_t *info,
				 rtp_callback_f rtp_callback,
				 rtsp_thread_callback_f rtp_periodic,
				 int rtp_interleave,
				 void *ud);
  int rtsp_thread_send_rtcp(rtsp_client_t *info,
			    int interleave,
			    uint8_t *buffer,
			    int buflen);
/*
 * rtsp message function error messages
 */
#define RTSP_RESPONSE_RECV_ERROR -1
#define RTSP_RESPONSE_BAD -2
#define RTSP_RESPONSE_MISSING_OR_BAD_PARAM -3
#define RTSP_RESPONSE_BAD_URL -4
#define RTSP_RESPONSE_CLOSED_SOCKET -5
#define RTSP_RESPONSE_REDIRECT  1
#define RTSP_RESPONSE_GOOD 0
#define RTSP_RESPONSE_MALFORM_HEADER -6
/*
 * rtsp_send_describe - send describe message
 * Input - info - handle for session
 *         cmd - pointer to command structure
 *         resp - pointer to pointer for response structure - free after using
 * Output - error message above
 */
int rtsp_send_describe(rtsp_client_t *info,
		       rtsp_command_t *cmd,
		       rtsp_decode_t **resp);

/*
 * rtsp_send_setup - send set up message.
 *   requires cmd->transport to be set up.
 * Inputs - info - handle for session
 *          url - "sub"-url for this stream.  Should be related to url for
 *                session
 *          cmd - pointer to command structure
 *          session_result - pointer to session handle
 *          decode_result - pointer to pointer for decode result - free when
 *                          done
 * Outputs - see error values
 */
int rtsp_send_setup(rtsp_client_t *info,
		    const char *url,
		    rtsp_command_t *cmd,
		    rtsp_session_t **session_result,
		    rtsp_decode_t **decode_result,
		    int is_aggregate);

/*
 * rtsp_send_pause - send a pause message for a stream.
 * Inputs - session - handle returned by setup message
 *          cmd - pointer to command structure
 *          decode_result - p to p of decode resp structure - free when done
 * Outputs - see error result
 */
int rtsp_send_pause(rtsp_session_t *session,
		    rtsp_command_t *cmd,
		    rtsp_decode_t **decode_result);

/*
 * rtsp_send_play - send play message for an set-up session
 * You most likely want to set cmd->range.
 * Inputs - session - handle returned by setup message
 *          cmd - pointer to command structure
 *          decode_result - p to p of decode resp structure - free when done
 * Outputs - see error result
 */
int rtsp_send_play(rtsp_session_t *session,
		   rtsp_command_t *cmd,
		   rtsp_decode_t **decode_result);
/*
 * rtsp_send_aggregate_play - send play message for an set-up session
 * You most likely want to set cmd->range.
 * Inputs - info - client pointer.
 *          aggregate_url - pointer to aggregate url.
 *          cmd - pointer to command structure
 *          decode_result - p to p of decode resp structure - free when done
 * Outputs - see error result
 */
int rtsp_send_aggregate_play(rtsp_client_t *info,
			     const char *aggregate_url,
			     rtsp_command_t *cmd,
			     rtsp_decode_t **decode_result);

/*
 * rtsp_send_aggregate_pause - send play message for an set-up session
 * You most likely want to set cmd->range.
 * Inputs - info - client pointer.
 *          aggregate_url - pointer to aggregate url.
 *          cmd - pointer to command structure
 *          decode_result - p to p of decode resp structure - free when done
 * Outputs - see error result
 */
int rtsp_send_aggregate_pause(rtsp_client_t *info,
			      const char *aggregate_url,
			      rtsp_command_t *cmd,
			      rtsp_decode_t **decode_result);

  
/*
 * rtsp_send_teardown - send a teardown for a particular session
 * You most likely want to set cmd->range.
 * Inputs - session - handle returned by setup message
 *          cmd - pointer to command structure
 *          decode_result - p to p of decode resp structure - free when done
 * Outputs - see error result
 */
int rtsp_send_teardown(rtsp_session_t *session,
		       rtsp_command_t *cmd,
		       rtsp_decode_t **decode_result);

int rtsp_send_aggregate_teardown (rtsp_client_t *info,
				  const char *url,
				  rtsp_command_t *cmd,
				  rtsp_decode_t **decode_result);
  

int rtsp_is_url_my_stream(rtsp_session_t *session, const char *url,
						  const char *content_base, const char *session_name);

  struct in_addr get_server_ip_address(rtsp_session_t *session);
/*
 * rtsp_set_loglevel - set debug output level.
 * Input - loglevel - levels from syslog.h
 */
void rtsp_set_loglevel(int loglevel);

void rtsp_set_error_func(error_msg_func_t func);
#ifdef __cplusplus
}
#endif

#endif