1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
|
/* GStreamer
* Copyright (C) <2012> Wim Taymans <wim.taymans@gmail.com>
* Copyright (C) <2020> Matthew Waters <matthew@centricular.com>
*
* gstrtphdrext.h: RTP header extensions
*
* 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.
*/
#ifndef __GST_RTPHDREXT_H__
#define __GST_RTPHDREXT_H__
#include <gst/gst.h>
#include <gst/rtp/gstrtpbuffer.h>
G_BEGIN_DECLS
#define GST_RTP_HDREXT_BASE "urn:ietf:params:rtp-hdrext:"
/* RFC 6051 */
#define GST_RTP_HDREXT_NTP_64 "ntp-64"
#define GST_RTP_HDREXT_NTP_64_SIZE 8
GST_RTP_API
gboolean gst_rtp_hdrext_set_ntp_64 (gpointer data, guint size, guint64 ntptime);
GST_RTP_API
gboolean gst_rtp_hdrext_get_ntp_64 (gpointer data, guint size, guint64 *ntptime);
#define GST_RTP_HDREXT_NTP_56 "ntp-56"
#define GST_RTP_HDREXT_NTP_56_SIZE 7
GST_RTP_API
gboolean gst_rtp_hdrext_set_ntp_56 (gpointer data, guint size, guint64 ntptime);
GST_RTP_API
gboolean gst_rtp_hdrext_get_ntp_56 (gpointer data, guint size, guint64 *ntptime);
/**
* GST_RTP_HDREXT_ELEMENT_CLASS:
*
* Constant string used in element classification to signal that this element
* is a RTP header extension.
*
* Since: 1.20
*/
#define GST_RTP_HDREXT_ELEMENT_CLASS "Network/Extension/RTPHeader"
GST_RTP_API
GType gst_rtp_header_extension_get_type (void);
#define GST_TYPE_RTP_HEADER_EXTENSION (gst_rtp_header_extension_get_type())
#define GST_RTP_HEADER_EXTENSION(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_RTP_HEADER_EXTENSION,GstRTPHeaderExtension))
#define GST_RTP_HEADER_EXTENSION_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_RTP_HEADER_EXTENSION,GstRTPHeaderExtensionClass))
#define GST_RTP_HEADER_EXTENSION_GET_CLASS(obj) \
(G_TYPE_INSTANCE_GET_CLASS ((obj),GST_TYPE_RTP_HEADER_EXTENSION,GstRTPHeaderExtensionClass))
#define GST_IS_RTP_HEADER_EXTENSION(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_RTP_HEADER_EXTENSION))
#define GST_IS_RTP_HEADER_EXTENSION_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_RTP_HEADER_EXTENSION))
/**
* GST_RTP_HEADER_EXTENSION_CAST:
*
* Since: 1.20
*/
#define GST_RTP_HEADER_EXTENSION_CAST(obj) ((GstRTPHeaderExtension *)(obj))
typedef struct _GstRTPHeaderExtension GstRTPHeaderExtension;
typedef struct _GstRTPHeaderExtensionClass GstRTPHeaderExtensionClass;
/**
* GstRTPHeaderExtensionFlags:
* @GST_RTP_HEADER_EXTENSION_ONE_BYTE: The one byte rtp extension header.
* 1-16 data bytes per extension with a maximum of
* 14 extension ids in total.
* @GST_RTP_HEADER_EXTENSION_TWO_BYTE: The two byte rtp extension header.
* 256 data bytes per extension with a maximum of 255 (or 256
* including appbits) extensions in total.
*
* Flags that apply to a RTP Audio/Video header extension.
*
* Since: 1.20
*/
typedef enum /*< underscore_name=gst_rtp_header_extension_flags >*/
{
GST_RTP_HEADER_EXTENSION_ONE_BYTE = (1 << 0),
GST_RTP_HEADER_EXTENSION_TWO_BYTE = (1 << 1),
} GstRTPHeaderExtensionFlags;
/**
* GstRTPHeaderExtension:
* @parent: the parent #GObject
* @ext_id: the configured extension id
*
* Instance struct for a RTP Audio/Video header extension.
*
* Since: 1.20
*/
struct _GstRTPHeaderExtension
{
GstElement parent;
/*< private >*/
gpointer _gst_reserved[GST_PADDING];
};
/**
* GstRTPHeaderExtensionClass:
* @parent_class: the parent class
* @get_uri: retrieve the RTP extension uri
* @get_supported_flags: retrieve the supported flags
* @get_max_size: retrieve the maximum size for this extension based on the
* information available from input_meta. Implementations should attempt
* to provide as accurate information as possible as the returned value
* will be used to control the amount of possible data in the payload.
* Implementations must return the maximum as the allocated size for
* writing the extension will be at least the size of the returned value.
* Return the amount of data read or <0 on failure.
* @write: write into @data the information for this extension. Various
* information is provided to help writing extensions in particular cases.
* @read: read from a rtp payloaded buffer and extract the extension
* information, optionally adding some meta onto the output buffer.
* @set_non_rtp_sink_caps: read any information from sink caps that the header
* extension needs for its function.
* @update_non_rtp_src_caps: update depayloader non-RTP (depayloaded) caps with
* the information parsed from RTP header.
* @set_attributes_from_caps: read the caps information to set the necessary
* attributes that may be signaled e.g. with an SDP.
* @set_caps_from_attributes: write the necessary caps field/s for the configured
* attributes e.g. as signalled with SDP.
*
* Base class for RTP Header extensions.
*
* Since: 1.20
*/
struct _GstRTPHeaderExtensionClass
{
GstElementClass parent_class;
/*< public >*/
GstRTPHeaderExtensionFlags (*get_supported_flags) (GstRTPHeaderExtension * ext);
gsize (*get_max_size) (GstRTPHeaderExtension * ext,
const GstBuffer * input_meta);
gsize (*write) (GstRTPHeaderExtension * ext,
const GstBuffer * input_meta,
GstRTPHeaderExtensionFlags write_flags,
GstBuffer * output,
guint8 * data,
gsize size);
gboolean (*read) (GstRTPHeaderExtension * ext,
GstRTPHeaderExtensionFlags read_flags,
const guint8 * data,
gsize size,
GstBuffer * buffer);
gboolean (*set_non_rtp_sink_caps) (GstRTPHeaderExtension * ext,
const GstCaps * caps);
gboolean (*update_non_rtp_src_caps) (GstRTPHeaderExtension * ext,
GstCaps * caps);
gboolean (*set_attributes_from_caps) (GstRTPHeaderExtension * ext,
const GstCaps * caps);
gboolean (*set_caps_from_attributes) (GstRTPHeaderExtension * ext,
GstCaps * caps);
/*< private >*/
gpointer _gst_reserved[GST_PADDING];
};
G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstRTPHeaderExtension, gst_object_unref)
/**
* GST_RTP_HEADER_EXTENSION_URI_METADATA_KEY:
*
* Since: 1.20
*/
#define GST_RTP_HEADER_EXTENSION_URI_METADATA_KEY "RTP-Header-Extension-URI"
GST_RTP_API
void gst_rtp_header_extension_class_set_uri (GstRTPHeaderExtensionClass *klass,
const gchar * uri);
GST_RTP_API
const gchar * gst_rtp_header_extension_get_uri (GstRTPHeaderExtension * ext);
GST_RTP_API
gsize gst_rtp_header_extension_get_max_size (GstRTPHeaderExtension * ext,
const GstBuffer * input_meta);
GST_RTP_API
GstRTPHeaderExtensionFlags gst_rtp_header_extension_get_supported_flags (GstRTPHeaderExtension * ext);
GST_RTP_API
guint gst_rtp_header_extension_get_id (GstRTPHeaderExtension * ext);
GST_RTP_API
void gst_rtp_header_extension_set_id (GstRTPHeaderExtension * ext,
guint ext_id);
GST_RTP_API
gsize gst_rtp_header_extension_write (GstRTPHeaderExtension * ext,
const GstBuffer * input_meta,
GstRTPHeaderExtensionFlags write_flags,
GstBuffer * output,
guint8 * data,
gsize size);
GST_RTP_API
gboolean gst_rtp_header_extension_read (GstRTPHeaderExtension * ext,
GstRTPHeaderExtensionFlags read_flags,
const guint8 * data,
gsize size,
GstBuffer * buffer);
GST_RTP_API
gboolean gst_rtp_header_extension_set_non_rtp_sink_caps (GstRTPHeaderExtension * ext,
const GstCaps * caps);
GST_RTP_API
gboolean gst_rtp_header_extension_wants_update_non_rtp_src_caps (GstRTPHeaderExtension * ext);
GST_RTP_API
void gst_rtp_header_extension_set_wants_update_non_rtp_src_caps (GstRTPHeaderExtension * ext,
gboolean state);
GST_RTP_API
gboolean gst_rtp_header_extension_update_non_rtp_src_caps (GstRTPHeaderExtension * ext,
GstCaps * caps);
GST_RTP_API
gboolean gst_rtp_header_extension_set_caps_from_attributes (GstRTPHeaderExtension * ext,
GstCaps * caps);
GST_RTP_API
gboolean gst_rtp_header_extension_set_attributes_from_caps (GstRTPHeaderExtension * ext,
const GstCaps * caps);
GST_RTP_API
GList * gst_rtp_get_header_extension_list (void);
GST_RTP_API
GstRTPHeaderExtension * gst_rtp_header_extension_create_from_uri (const gchar * uri);
GST_RTP_API
gchar * gst_rtp_header_extension_get_sdp_caps_field_name (GstRTPHeaderExtension * ext);
GST_RTP_API
gboolean gst_rtp_header_extension_set_attributes_from_caps_simple_sdp (GstRTPHeaderExtension * ext, const GstCaps *caps);
GST_RTP_API
gboolean gst_rtp_header_extension_set_caps_from_attributes_simple_sdp (GstRTPHeaderExtension * ext, GstCaps *caps);
G_END_DECLS
#endif /* __GST_RTPHDREXT_H__ */
|
