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422 lines
16 KiB
C
422 lines
16 KiB
C
/* GStreamer
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* Copyright (C) <2007> Wim Taymans <wim.taymans@gmail.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __RTP_SESSION_H__
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#define __RTP_SESSION_H__
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#include <gst/gst.h>
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#include "rtpsource.h"
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typedef struct _RTPSession RTPSession;
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typedef struct _RTPSessionClass RTPSessionClass;
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#define RTP_TYPE_SESSION (rtp_session_get_type())
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#define RTP_SESSION(sess) (G_TYPE_CHECK_INSTANCE_CAST((sess),RTP_TYPE_SESSION,RTPSession))
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#define RTP_SESSION_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),RTP_TYPE_SESSION,RTPSessionClass))
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#define RTP_IS_SESSION(sess) (G_TYPE_CHECK_INSTANCE_TYPE((sess),RTP_TYPE_SESSION))
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#define RTP_IS_SESSION_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),RTP_TYPE_SESSION))
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#define RTP_SESSION_CAST(sess) ((RTPSession *)(sess))
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#define RTP_SESSION_LOCK(sess) (g_mutex_lock (&(sess)->lock))
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#define RTP_SESSION_UNLOCK(sess) (g_mutex_unlock (&(sess)->lock))
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/**
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* RTPSessionProcessRTP:
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* @sess: an #RTPSession
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* @src: the #RTPSource
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* @buffer: the RTP buffer ready for processing
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* @user_data: user data specified when registering
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*
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* This callback will be called when @sess has @buffer ready for further
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* processing. Processing the buffer typically includes decoding and displaying
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* the buffer.
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*
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* Returns: a #GstFlowReturn.
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*/
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typedef GstFlowReturn (*RTPSessionProcessRTP) (RTPSession *sess, RTPSource *src, GstBuffer *buffer, gpointer user_data);
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/**
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* RTPSessionSendRTP:
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* @sess: an #RTPSession
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* @src: the #RTPSource
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* @data: the RTP buffer or buffer list ready for sending
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* @user_data: user data specified when registering
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*
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* This callback will be called when @sess has @data (a buffer or buffer list)
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* ready for sending to all listening participants in this session.
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*
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* Returns: a #GstFlowReturn.
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*/
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typedef GstFlowReturn (*RTPSessionSendRTP) (RTPSession *sess, RTPSource *src, gpointer data, gpointer user_data);
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/**
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* RTPSessionSendRTCP:
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* @sess: an #RTPSession
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* @src: the #RTPSource
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* @buffer: the RTCP buffer ready for sending
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* @eos: if an EOS event should be pushed
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* @user_data: user data specified when registering
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*
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* This callback will be called when @sess has @buffer ready for sending to
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* all listening participants in this session.
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*
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* Returns: a #GstFlowReturn.
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*/
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typedef GstFlowReturn (*RTPSessionSendRTCP) (RTPSession *sess, RTPSource *src, GstBuffer *buffer,
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gboolean eos, gpointer user_data);
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/**
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* RTPSessionSyncRTCP:
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* @sess: an #RTPSession
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* @buffer: the RTCP buffer ready for synchronisation
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* @user_data: user data specified when registering
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*
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* This callback will be called when @sess has an SR @buffer ready for doing
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* synchronisation between streams.
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*
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* Returns: a #GstFlowReturn.
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*/
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typedef GstFlowReturn (*RTPSessionSyncRTCP) (RTPSession *sess, GstBuffer *buffer, gpointer user_data);
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/**
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* RTPSessionClockRate:
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* @sess: an #RTPSession
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* @payload: the payload
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* @user_data: user data specified when registering
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*
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* This callback will be called when @sess needs the clock-rate of @payload.
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*
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* Returns: the clock-rate of @pt.
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*/
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typedef gint (*RTPSessionClockRate) (RTPSession *sess, guint8 payload, gpointer user_data);
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/**
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* RTPSessionReconsider:
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* @sess: an #RTPSession
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* @user_data: user data specified when registering
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*
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* This callback will be called when @sess needs to cancel the current timeout.
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* The currently running timeout should be canceled and a new reporting interval
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* should be requested from @sess.
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*/
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typedef void (*RTPSessionReconsider) (RTPSession *sess, gpointer user_data);
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/**
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* RTPSessionRequestKeyUnit:
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* @sess: an #RTPSession
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* @ssrc: SSRC of the source related to the key unit request
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* @all_headers: %TRUE if "all-headers" property should be set on the key unit
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* request
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* @user_data: user data specified when registering
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*
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* Asks the encoder to produce a key unit as soon as possibly within the
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* bandwidth constraints
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*/
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typedef void (*RTPSessionRequestKeyUnit) (RTPSession *sess, guint32 ssrc,
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gboolean all_headers, gpointer user_data);
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/**
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* RTPSessionRequestTime:
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* @sess: an #RTPSession
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* @user_data: user data specified when registering
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*
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* This callback will be called when @sess needs the current time. The time
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* should be returned as a #GstClockTime
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*/
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typedef GstClockTime (*RTPSessionRequestTime) (RTPSession *sess,
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gpointer user_data);
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/**
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* RTPSessionNotifyNACK:
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* @sess: an #RTPSession
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* @seqnum: the missing seqnum
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* @blp: other missing seqnums
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* @ssrc: SSRC of requested stream
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* @user_data: user data specified when registering
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*
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* Notifies of NACKed frames.
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*/
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typedef void (*RTPSessionNotifyNACK) (RTPSession *sess,
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guint16 seqnum, guint16 blp, guint32 ssrc, gpointer user_data);
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/**
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* RTPSessionReconfigure:
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* @sess: an #RTPSession
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* @user_data: user data specified when registering
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*
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* This callback will be called when @sess wants to reconfigure the
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* negotiated parameters.
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*/
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typedef void (*RTPSessionReconfigure) (RTPSession *sess, gpointer user_data);
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/**
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* RTPSessionNotifyEarlyRTCP:
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* @sess: an #RTPSession
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* @user_data: user data specified when registering
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*
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* Notifies of early RTCP being requested
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*/
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typedef void (*RTPSessionNotifyEarlyRTCP) (RTPSession *sess,
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gpointer user_data);
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/**
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* RTPSessionCallbacks:
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* @RTPSessionProcessRTP: callback to process RTP packets
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* @RTPSessionSendRTP: callback for sending RTP packets
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* @RTPSessionSendRTCP: callback for sending RTCP packets
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* @RTPSessionSyncRTCP: callback for handling SR packets
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* @RTPSessionReconsider: callback for reconsidering the timeout
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* @RTPSessionRequestKeyUnit: callback for requesting a new key unit
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* @RTPSessionRequestTime: callback for requesting the current time
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* @RTPSessionNotifyNACK: callback for notifying NACK
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* @RTPSessionReconfigure: callback for requesting reconfiguration
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* @RTPSessionNotifyEarlyRTCP: callback for notifying early RTCP
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*
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* These callbacks can be installed on the session manager to get notification
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* when RTP and RTCP packets are ready for further processing. These callbacks
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* are not implemented with signals for performance reasons.
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*/
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typedef struct {
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RTPSessionProcessRTP process_rtp;
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RTPSessionSendRTP send_rtp;
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RTPSessionSyncRTCP sync_rtcp;
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RTPSessionSendRTCP send_rtcp;
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RTPSessionClockRate clock_rate;
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RTPSessionReconsider reconsider;
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RTPSessionRequestKeyUnit request_key_unit;
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RTPSessionRequestTime request_time;
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RTPSessionNotifyNACK notify_nack;
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RTPSessionReconfigure reconfigure;
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RTPSessionNotifyEarlyRTCP notify_early_rtcp;
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} RTPSessionCallbacks;
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/**
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* RTPSession:
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* @lock: lock to protect the session
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* @source: the source of this session
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* @ssrcs: Hashtable of sources indexed by SSRC
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* @num_sources: the number of sources
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* @activecount: the number of active sources
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* @callbacks: callbacks
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* @user_data: user data passed in callbacks
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* @stats: session statistics
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* @conflicting_addresses: GList of conflicting addresses
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*
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* The RTP session manager object
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*/
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struct _RTPSession {
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GObject object;
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GMutex lock;
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guint header_len;
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guint mtu;
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GstStructure *sdes;
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guint probation;
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guint32 max_dropout_time;
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guint32 max_misorder_time;
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GstRTPProfile rtp_profile;
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gboolean reduced_size_rtcp;
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/* bandwidths */
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gboolean recalc_bandwidth;
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guint bandwidth;
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gdouble rtcp_bandwidth;
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guint rtcp_rr_bandwidth;
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guint rtcp_rs_bandwidth;
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guint32 suggested_ssrc;
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gboolean internal_ssrc_set;
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gboolean internal_ssrc_from_caps_or_property;
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/* for sender/receiver counting */
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guint32 key;
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guint32 mask_idx;
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guint32 mask;
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GHashTable *ssrcs[32];
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guint total_sources;
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guint16 generation;
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GstClockTime next_rtcp_check_time; /* tn */
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GstClockTime last_rtcp_check_time; /* tp */
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GstClockTime last_rtcp_send_time; /* t_rr_last */
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GstClockTime last_rtcp_interval; /* T_rr */
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GstClockTime start_time;
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gboolean first_rtcp;
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gboolean allow_early;
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GstClockTime next_early_rtcp_time;
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gboolean scheduled_bye;
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RTPSessionCallbacks callbacks;
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gpointer process_rtp_user_data;
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gpointer send_rtp_user_data;
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gpointer send_rtcp_user_data;
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gpointer sync_rtcp_user_data;
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gpointer clock_rate_user_data;
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gpointer reconsider_user_data;
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gpointer request_key_unit_user_data;
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gpointer request_time_user_data;
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gpointer notify_nack_user_data;
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gpointer reconfigure_user_data;
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gpointer notify_early_rtcp_user_data;
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RTPSessionStats stats;
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RTPSessionStats bye_stats;
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gboolean favor_new;
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GstClockTime rtcp_feedback_retention_window;
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guint rtcp_immediate_feedback_threshold;
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gboolean is_doing_ptp;
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GList *conflicting_addresses;
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gboolean timestamp_sender_reports;
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};
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/**
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* RTPSessionClass:
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* @on_new_ssrc: emitted when a new source is found
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* @on_bye_ssrc: emitted when a source is gone
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*
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* The session class.
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*/
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struct _RTPSessionClass {
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GObjectClass parent_class;
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/* action signals */
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RTPSource* (*get_source_by_ssrc) (RTPSession *sess, guint32 ssrc);
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/* signals */
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void (*on_new_ssrc) (RTPSession *sess, RTPSource *source);
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void (*on_ssrc_collision) (RTPSession *sess, RTPSource *source);
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void (*on_ssrc_validated) (RTPSession *sess, RTPSource *source);
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void (*on_ssrc_active) (RTPSession *sess, RTPSource *source);
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void (*on_ssrc_sdes) (RTPSession *sess, RTPSource *source);
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void (*on_bye_ssrc) (RTPSession *sess, RTPSource *source);
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void (*on_bye_timeout) (RTPSession *sess, RTPSource *source);
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void (*on_timeout) (RTPSession *sess, RTPSource *source);
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void (*on_sender_timeout) (RTPSession *sess, RTPSource *source);
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gboolean (*on_sending_rtcp) (RTPSession *sess, GstBuffer *buffer,
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gboolean early);
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void (*on_app_rtcp) (RTPSession *sess, guint subtype, guint ssrc,
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const gchar *name, GstBuffer *data);
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void (*on_feedback_rtcp) (RTPSession *sess, guint type, guint fbtype,
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guint sender_ssrc, guint media_ssrc, GstBuffer *fci);
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gboolean (*send_rtcp) (RTPSession *sess, GstClockTime max_delay);
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void (*on_receiving_rtcp) (RTPSession *sess, GstBuffer *buffer);
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void (*on_new_sender_ssrc) (RTPSession *sess, RTPSource *source);
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void (*on_sender_ssrc_active) (RTPSession *sess, RTPSource *source);
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guint (*on_sending_nacks) (RTPSession *sess, guint sender_ssrc,
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guint media_ssrc, GArray *nacks, GstBuffer *buffer);
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};
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GType rtp_session_get_type (void);
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/* create and configure */
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RTPSession* rtp_session_new (void);
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void rtp_session_reset (RTPSession *sess);
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void rtp_session_set_callbacks (RTPSession *sess,
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RTPSessionCallbacks *callbacks,
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gpointer user_data);
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void rtp_session_set_process_rtp_callback (RTPSession * sess,
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RTPSessionProcessRTP callback,
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gpointer user_data);
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void rtp_session_set_send_rtp_callback (RTPSession * sess,
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RTPSessionSendRTP callback,
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gpointer user_data);
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void rtp_session_set_send_rtcp_callback (RTPSession * sess,
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RTPSessionSendRTCP callback,
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gpointer user_data);
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void rtp_session_set_sync_rtcp_callback (RTPSession * sess,
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RTPSessionSyncRTCP callback,
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gpointer user_data);
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void rtp_session_set_clock_rate_callback (RTPSession * sess,
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RTPSessionClockRate callback,
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gpointer user_data);
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void rtp_session_set_reconsider_callback (RTPSession * sess,
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RTPSessionReconsider callback,
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gpointer user_data);
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void rtp_session_set_request_time_callback (RTPSession * sess,
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RTPSessionRequestTime callback,
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gpointer user_data);
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void rtp_session_set_bandwidth (RTPSession *sess, gdouble bandwidth);
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gdouble rtp_session_get_bandwidth (RTPSession *sess);
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void rtp_session_set_rtcp_fraction (RTPSession *sess, gdouble fraction);
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gdouble rtp_session_get_rtcp_fraction (RTPSession *sess);
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GstStructure * rtp_session_get_sdes_struct (RTPSession *sess);
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void rtp_session_set_sdes_struct (RTPSession *sess, const GstStructure *sdes);
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/* handling sources */
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guint32 rtp_session_suggest_ssrc (RTPSession *sess, gboolean *is_random);
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gboolean rtp_session_add_source (RTPSession *sess, RTPSource *src);
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guint rtp_session_get_num_sources (RTPSession *sess);
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guint rtp_session_get_num_active_sources (RTPSession *sess);
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RTPSource* rtp_session_get_source_by_ssrc (RTPSession *sess, guint32 ssrc);
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/* processing packets from receivers */
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GstFlowReturn rtp_session_process_rtp (RTPSession *sess, GstBuffer *buffer,
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GstClockTime current_time,
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GstClockTime running_time,
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guint64 ntpnstime);
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GstFlowReturn rtp_session_process_rtcp (RTPSession *sess, GstBuffer *buffer,
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GstClockTime current_time,
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GstClockTime running_time,
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guint64 ntpnstime);
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/* processing packets for sending */
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void rtp_session_update_send_caps (RTPSession *sess, GstCaps *caps);
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GstFlowReturn rtp_session_send_rtp (RTPSession *sess, gpointer data, gboolean is_list,
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GstClockTime current_time, GstClockTime running_time);
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/* scheduling bye */
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void rtp_session_mark_all_bye (RTPSession *sess, const gchar *reason);
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GstFlowReturn rtp_session_schedule_bye (RTPSession *sess, GstClockTime current_time);
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/* get interval for next RTCP interval */
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GstClockTime rtp_session_next_timeout (RTPSession *sess, GstClockTime current_time);
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GstFlowReturn rtp_session_on_timeout (RTPSession *sess, GstClockTime current_time,
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guint64 ntpnstime, GstClockTime running_time);
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/* request the transmission of an early RTCP packet */
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gboolean rtp_session_request_early_rtcp (RTPSession * sess, GstClockTime current_time,
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GstClockTime max_delay);
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/* Notify session of a request for a new key unit */
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gboolean rtp_session_request_key_unit (RTPSession * sess,
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guint32 ssrc,
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gboolean fir,
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gint count);
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gboolean rtp_session_request_nack (RTPSession * sess,
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guint32 ssrc,
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guint16 seqnum,
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GstClockTime max_delay);
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#endif /* __RTP_SESSION_H__ */
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