1 /* GStreamer
2  * Copyright (C) 2017 Matthew Waters <matthew@centricular.com>
3  *
4  * This library is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Library General Public
6  * License as published by the Free Software Foundation; either
7  * version 2 of the License, or (at your option) any later version.
8  *
9  * This library is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12  * Library General Public License for more details.
13  *
14  * You should have received a copy of the GNU Library General Public
15  * License along with this library; if not, write to the
16  * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
17  * Boston, MA 02110-1301, USA.
18  */
19 
20 #ifndef __GST_WEBRTC_BIN_H__
21 #define __GST_WEBRTC_BIN_H__
22 
23 #include <gst/sdp/sdp.h>
24 #include "fwd.h"
25 #include "gstwebrtcice.h"
26 #include "transportstream.h"
27 
28 G_BEGIN_DECLS
29 
30 GType gst_webrtc_bin_pad_get_type(void);
31 #define GST_TYPE_WEBRTC_BIN_PAD            (gst_webrtc_bin_pad_get_type())
32 #define GST_WEBRTC_BIN_PAD(obj)            (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_WEBRTC_BIN_PAD,GstWebRTCBinPad))
33 #define GST_IS_WEBRTC_BIN_PAD(obj)         (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_WEBRTC_BIN_PAD))
34 #define GST_WEBRTC_BIN_PAD_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST((klass) ,GST_TYPE_WEBRTC_BIN_PAD,GstWebRTCBinPadClass))
35 #define GST_IS_WEBRTC_BIN_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass) ,GST_TYPE_WEBRTC_BIN_PAD))
36 #define GST_WEBRTC_BIN_PAD_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS((obj) ,GST_TYPE_WEBRTC_BIN_PAD,GstWebRTCBinPadClass))
37 
38 typedef struct _GstWebRTCBinPad GstWebRTCBinPad;
39 typedef struct _GstWebRTCBinPadClass GstWebRTCBinPadClass;
40 
41 struct _GstWebRTCBinPad
42 {
43   GstGhostPad           parent;
44 
45   guint                 mlineindex;
46 
47   GstWebRTCRTPTransceiver *trans;
48   gulong                block_id;
49 
50   GstCaps              *received_caps;
51 };
52 
53 struct _GstWebRTCBinPadClass
54 {
55   GstGhostPadClass      parent_class;
56 };
57 
58 GType gst_webrtc_bin_get_type(void);
59 #define GST_TYPE_WEBRTC_BIN            (gst_webrtc_bin_get_type())
60 #define GST_WEBRTC_BIN(obj)            (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_WEBRTC_BIN,GstWebRTCBin))
61 #define GST_IS_WEBRTC_BIN(obj)         (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_WEBRTC_BIN))
62 #define GST_WEBRTC_BIN_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST((klass) ,GST_TYPE_WEBRTC_BIN,GstWebRTCBinClass))
63 #define GST_IS_WEBRTC_BIN_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass) ,GST_TYPE_WEBRTC_BIN))
64 #define GST_WEBRTC_BIN_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS((obj) ,GST_TYPE_WEBRTC_BIN,GstWebRTCBinClass))
65 
66 struct _GstWebRTCBin
67 {
68   GstBin                            parent;
69 
70   GstElement                       *rtpbin;
71   GstElement                       *rtpfunnel;
72 
73   GstWebRTCSignalingState           signaling_state;
74   GstWebRTCICEGatheringState        ice_gathering_state;
75   GstWebRTCICEConnectionState       ice_connection_state;
76   GstWebRTCPeerConnectionState      peer_connection_state;
77 
78   GstWebRTCSessionDescription      *current_local_description;
79   GstWebRTCSessionDescription      *pending_local_description;
80   GstWebRTCSessionDescription      *current_remote_description;
81   GstWebRTCSessionDescription      *pending_remote_description;
82 
83   GstWebRTCBundlePolicy             bundle_policy;
84   GstWebRTCICETransportPolicy       ice_transport_policy;
85 
86   GstWebRTCBinPrivate              *priv;
87 };
88 
89 struct _GstWebRTCBinClass
90 {
91   GstBinClass           parent_class;
92 };
93 
94 struct _GstWebRTCBinPrivate
95 {
96   guint max_sink_pad_serial;
97 
98   gboolean bundle;
99   GArray *transceivers;
100   GArray *session_mid_map;
101   GArray *transports;
102   GArray *data_channels;
103   /* list of data channels we've received a sctp stream for but no data
104    * channel protocol for */
105   GArray *pending_data_channels;
106 
107   GstWebRTCSCTPTransport *sctp_transport;
108   TransportStream *data_channel_transport;
109 
110   GstWebRTCICE *ice;
111   GArray *ice_stream_map;
112   GArray *pending_ice_candidates;
113 
114   /* peerconnection variables */
115   gboolean is_closed;
116   gboolean need_negotiation;
117 
118   /* peerconnection helper thread for promises */
119   GMainContext *main_context;
120   GMainLoop *loop;
121   GThread *thread;
122   GMutex pc_lock;
123   GCond pc_cond;
124 
125   gboolean running;
126   gboolean async_pending;
127 
128   GList *pending_pads;
129   GList *pending_sink_transceivers;
130 
131   /* count of the number of media streams we've offered for uniqueness */
132   /* FIXME: overflow? */
133   guint media_counter;
134 
135   GstStructure *stats;
136 };
137 
138 typedef void (*GstWebRTCBinFunc) (GstWebRTCBin * webrtc, gpointer data);
139 
140 typedef struct
141 {
142   GstWebRTCBin *webrtc;
143   GstWebRTCBinFunc op;
144   gpointer data;
145   GDestroyNotify notify;
146 //  GstPromise *promise;      /* FIXME */
147 } GstWebRTCBinTask;
148 
149 void            gst_webrtc_bin_enqueue_task             (GstWebRTCBin * pc,
150                                                          GstWebRTCBinFunc func,
151                                                          gpointer data,
152                                                          GDestroyNotify notify);
153 
154 G_END_DECLS
155 
156 #endif /* __GST_WEBRTC_BIN_H__ */
157