/* GStreamer
 * Copyright (C) 2008 Wim Taymans <wim.taymans at gmail.com>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

#include <gst/gst.h>

#include <gst/rtsp/gstrtsptransport.h>

#ifndef __GST_RTSP_SESSION_H__
#define __GST_RTSP_SESSION_H__

G_BEGIN_DECLS

#define GST_TYPE_RTSP_SESSION              (gst_rtsp_session_get_type ())
#define GST_IS_RTSP_SESSION(obj)           (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_RTSP_SESSION))
#define GST_IS_RTSP_SESSION_CLASS(klass)   (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_RTSP_SESSION))
#define GST_RTSP_SESSION_GET_CLASS(obj)    (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_RTSP_SESSION, GstRTSPSessionClass))
#define GST_RTSP_SESSION(obj)              (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_RTSP_SESSION, GstRTSPSession))
#define GST_RTSP_SESSION_CLASS(klass)      (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_RTSP_SESSION, GstRTSPSessionClass))
#define GST_RTSP_SESSION_CAST(obj)         ((GstRTSPSession*)(obj))
#define GST_RTSP_SESSION_CLASS_CAST(klass) ((GstRTSPSessionClass*)(klass))

typedef struct _GstRTSPSession GstRTSPSession;
typedef struct _GstRTSPSessionClass GstRTSPSessionClass;

typedef struct _GstRTSPSessionStream GstRTSPSessionStream;
typedef struct _GstRTSPSessionMedia GstRTSPSessionMedia;

#include "rtsp-media.h"

/**
 * GstRTSPSessionStream:
 * @trans: the media transport
 * @media_stream: the controlled media stream
 *
 * Configuration of a stream. A stream is an audio or video stream related to a
 * media.
 */
struct _GstRTSPSessionStream
{
  GstRTSPMediaTrans trans;

  /* the stream of the media */
  GstRTSPMediaStream *media_stream;
};

/**
 * GstRTSPSessionMedia:
 *
 * State of a client session regarding a specific media identified by uri.
 */
struct _GstRTSPSessionMedia
{
  /* the url of the media */
  GstRTSPUrl   *url;

  /* the pipeline for the media */
  GstRTSPMedia *media;

  /* the server state */
  GstRTSPState  state;

  /* counter for channels */
  guint         counter;

  /* configuration for the different streams */
  GArray       *streams;
};

/**
 * GstRTSPSession:
 * @sessionid: the session id of the session
 * @timeout: the timeout of the session
 * @create_time: the time when the session was created
 * @last_access: the time the session was last accessed
 * @expire_count: the expire prevention counter
 * @media: a list of #GstRTSPSessionMedia managed in this session
 *
 * Session information kept by the server for a specific client.
 * One client session, identified with a session id, can handle multiple medias
 * identified with the url of a media.
 */
struct _GstRTSPSession {
  GObject       parent;

  gchar        *sessionid;

  guint         timeout;
  GTimeVal      create_time;
  GTimeVal      last_access;
  gint          expire_count;

  GList        *medias;
};

struct _GstRTSPSessionClass {
  GObjectClass  parent_class;
};

GType                  gst_rtsp_session_get_type             (void);

/* create a new session */
GstRTSPSession *       gst_rtsp_session_new                  (const gchar *sessionid);

const gchar *          gst_rtsp_session_get_sessionid        (GstRTSPSession *session);

void                   gst_rtsp_session_set_timeout          (GstRTSPSession *session, guint timeout);
guint                  gst_rtsp_session_get_timeout          (GstRTSPSession *session);

/* session timeout stuff */
void                   gst_rtsp_session_touch                (GstRTSPSession *session);
void                   gst_rtsp_session_prevent_expire       (GstRTSPSession *session);
void                   gst_rtsp_session_allow_expire         (GstRTSPSession *session);
gint                   gst_rtsp_session_next_timeout         (GstRTSPSession *session, GTimeVal *now);
gboolean               gst_rtsp_session_is_expired           (GstRTSPSession *session, GTimeVal *now);

/* handle media in a session */
GstRTSPSessionMedia *  gst_rtsp_session_manage_media         (GstRTSPSession *sess,
                                                              const GstRTSPUrl *uri,
                                                              GstRTSPMedia *media);
gboolean               gst_rtsp_session_release_media        (GstRTSPSession *sess,
                                                              GstRTSPSessionMedia *media);
/* get media in a session */
GstRTSPSessionMedia *  gst_rtsp_session_get_media            (GstRTSPSession *sess,
                                                              const GstRTSPUrl *url);
/* control media */
gboolean               gst_rtsp_session_media_set_state      (GstRTSPSessionMedia *media, GstState state);

/* get stream config */
GstRTSPSessionStream * gst_rtsp_session_media_get_stream     (GstRTSPSessionMedia *media,
                                                              guint idx);

gboolean               gst_rtsp_session_media_alloc_channels (GstRTSPSessionMedia *media,
                                                              GstRTSPRange *range);

/* configure transport */
GstRTSPTransport *     gst_rtsp_session_stream_set_transport (GstRTSPSessionStream *stream,
                                                              GstRTSPTransport *ct);
void                   gst_rtsp_session_stream_set_callbacks (GstRTSPSessionStream *stream,
                                                              GstRTSPSendFunc send_rtp,
                                                              GstRTSPSendFunc send_rtcp,
                                                              gpointer user_data,
                                                              GDestroyNotify  notify);
void                   gst_rtsp_session_stream_set_keepalive (GstRTSPSessionStream *stream,
                                                              GstRTSPKeepAliveFunc keep_alive,
                                                              gpointer user_data,
                                                              GDestroyNotify  notify);

G_END_DECLS

#endif /* __GST_RTSP_SESSION_H__ */