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
|
using Gee;
using Xmpp;
using Xmpp.Xep;
public class Dino.Plugins.Rtp.Module : JingleRtp.Module {
private Set<string> supported_codecs = new HashSet<string>();
private Set<string> unsupported_codecs = new HashSet<string>();
public Plugin plugin { get; private set; }
public CodecUtil codec_util { get {
return plugin.codec_util;
}}
public Module(Plugin plugin) {
base();
this.plugin = plugin;
}
private async bool pipeline_works(string media, string element_desc) {
var supported = false;
string pipeline_desc = @"$(media)testsrc is-live=true ! $element_desc ! appsink name=output";
try {
var pipeline = Gst.parse_launch(pipeline_desc);
var output = (pipeline as Gst.Bin).get_by_name("output") as Gst.App.Sink;
SourceFunc callback = pipeline_works.callback;
var finished = false;
output.emit_signals = true;
output.new_sample.connect(() => {
if (!finished) {
finished = true;
supported = true;
Idle.add(() => {
callback();
return Source.REMOVE;
});
}
return Gst.FlowReturn.EOS;
});
pipeline.bus.add_watch(Priority.DEFAULT, (_, message) => {
if (message.type == Gst.MessageType.ERROR && !finished) {
Error e;
string d;
message.parse_error(out e, out d);
debug("pipeline [%s] failed: %s", pipeline_desc, e.message);
debug(d);
finished = true;
callback();
}
return true;
});
Timeout.add(2000, () => {
if (!finished) {
finished = true;
callback();
}
return Source.REMOVE;
});
pipeline.set_state(Gst.State.PLAYING);
yield;
pipeline.set_state(Gst.State.NULL);
} catch (Error e) {
debug("pipeline [%s] failed: %s", pipeline_desc, e.message);
}
return supported;
}
private async bool is_payload_supported(string media, JingleRtp.PayloadType payload_type) {
string? codec = CodecUtil.get_codec_from_payload(media, payload_type);
if (codec == null) return false;
if (unsupported_codecs.contains(codec)) return false;
if (supported_codecs.contains(codec)) return true;
string? encode_element = codec_util.get_encode_element_name(media, codec);
string? decode_element = codec_util.get_decode_element_name(media, codec);
if (encode_element == null || decode_element == null) {
debug("No suitable encoder or decoder found for %s", codec);
unsupported_codecs.add(codec);
return false;
}
string encode_bin = codec_util.get_encode_bin_description(media, codec, null, encode_element);
while (!(yield pipeline_works(media, encode_bin))) {
debug("%s not suited for encoding %s", encode_element, codec);
codec_util.mark_element_unsupported(encode_element);
encode_element = codec_util.get_encode_element_name(media, codec);
if (encode_element == null) {
debug("No suitable encoder found for %s", codec);
unsupported_codecs.add(codec);
return false;
}
encode_bin = codec_util.get_encode_bin_description(media, codec, null, encode_element);
}
debug("using %s to encode %s", encode_element, codec);
string decode_bin = codec_util.get_decode_bin_description(media, codec, null, decode_element);
while (!(yield pipeline_works(media, @"$encode_bin ! $decode_bin"))) {
debug("%s not suited for decoding %s", decode_element, codec);
codec_util.mark_element_unsupported(decode_element);
decode_element = codec_util.get_decode_element_name(media, codec);
if (decode_element == null) {
debug("No suitable decoder found for %s", codec);
unsupported_codecs.add(codec);
return false;
}
decode_bin = codec_util.get_decode_bin_description(media, codec, null, decode_element);
}
debug("using %s to decode %s", decode_element, codec);
supported_codecs.add(codec);
return true;
}
public override bool is_header_extension_supported(string media, JingleRtp.HeaderExtension ext) {
if (media == "video" && ext.uri == "urn:3gpp:video-orientation") return true;
return false;
}
public override Gee.List<JingleRtp.HeaderExtension> get_suggested_header_extensions(string media) {
Gee.List<JingleRtp.HeaderExtension> exts = new ArrayList<JingleRtp.HeaderExtension>();
if (media == "video") {
exts.add(new JingleRtp.HeaderExtension(1, "urn:3gpp:video-orientation"));
}
return exts;
}
public async void add_if_supported(Gee.List<JingleRtp.PayloadType> list, string media, JingleRtp.PayloadType payload_type) {
if (yield is_payload_supported(media, payload_type)) {
list.add(payload_type);
}
}
public override async Gee.List<JingleRtp.PayloadType> get_supported_payloads(string media) {
Gee.List<JingleRtp.PayloadType> list = new ArrayList<JingleRtp.PayloadType>(JingleRtp.PayloadType.equals_func);
if (media == "audio") {
var opus = new JingleRtp.PayloadType() { channels = 2, clockrate = 48000, name = "opus", id = 99 };
opus.parameters["useinbandfec"] = "1";
var speex32 = new JingleRtp.PayloadType() { channels = 1, clockrate = 32000, name = "speex", id = 100 };
var speex16 = new JingleRtp.PayloadType() { channels = 1, clockrate = 16000, name = "speex", id = 101 };
var speex8 = new JingleRtp.PayloadType() { channels = 1, clockrate = 8000, name = "speex", id = 102 };
var pcmu = new JingleRtp.PayloadType() { channels = 1, clockrate = 8000, name = "PCMU", id = 0 };
var pcma = new JingleRtp.PayloadType() { channels = 1, clockrate = 8000, name = "PCMA", id = 8 };
yield add_if_supported(list, media, opus);
yield add_if_supported(list, media, speex32);
yield add_if_supported(list, media, speex16);
yield add_if_supported(list, media, speex8);
yield add_if_supported(list, media, pcmu);
yield add_if_supported(list, media, pcma);
} else if (media == "video") {
var h264 = new JingleRtp.PayloadType() { clockrate = 90000, name = "H264", id = 96 };
var vp9 = new JingleRtp.PayloadType() { clockrate = 90000, name = "VP9", id = 97 };
var vp8 = new JingleRtp.PayloadType() { clockrate = 90000, name = "VP8", id = 98 };
var rtcp_fbs = new ArrayList<JingleRtp.RtcpFeedback>();
rtcp_fbs.add(new JingleRtp.RtcpFeedback("goog-remb"));
rtcp_fbs.add(new JingleRtp.RtcpFeedback("ccm", "fir"));
rtcp_fbs.add(new JingleRtp.RtcpFeedback("nack"));
rtcp_fbs.add(new JingleRtp.RtcpFeedback("nack", "pli"));
h264.rtcp_fbs.add_all(rtcp_fbs);
vp9.rtcp_fbs.add_all(rtcp_fbs);
vp8.rtcp_fbs.add_all(rtcp_fbs);
yield add_if_supported(list, media, h264);
yield add_if_supported(list, media, vp9);
yield add_if_supported(list, media, vp8);
} else {
warning("Unsupported media type: %s", media);
}
return list;
}
public override async JingleRtp.PayloadType? pick_payload_type(string media, Gee.List<JingleRtp.PayloadType> payloads) {
if (media == "audio") {
foreach (JingleRtp.PayloadType type in payloads) {
if (yield is_payload_supported(media, type)) return adjust_payload_type(media, type.clone());
}
} else if (media == "video") {
// We prefer H.264 (best support for hardware acceleration and good overall codec quality)
JingleRtp.PayloadType? h264 = payloads.first_match((it) => it.name.up() == "H264");
if (h264 != null && yield is_payload_supported(media, h264)) return adjust_payload_type(media, h264.clone());
// Take first of the list that we do support otherwise
foreach (JingleRtp.PayloadType type in payloads) {
if (yield is_payload_supported(media, type)) return adjust_payload_type(media, type.clone());
}
} else {
warning("Unsupported media type: %s", media);
}
return null;
}
public JingleRtp.PayloadType adjust_payload_type(string media, JingleRtp.PayloadType type) {
var iter = type.rtcp_fbs.iterator();
while (iter.next()) {
var fb = iter.@get();
switch (fb.type_) {
case "goog-remb":
if (fb.subtype != null) iter.remove();
break;
case "ccm":
if (fb.subtype != "fir") iter.remove();
break;
case "nack":
if (fb.subtype != null && fb.subtype != "pli") iter.remove();
break;
default:
iter.remove();
break;
}
}
return type;
}
public override JingleRtp.Stream create_stream(Jingle.Content content) {
return plugin.open_stream(content);
}
public override void close_stream(JingleRtp.Stream stream) {
var rtp_stream = stream as Rtp.Stream;
plugin.close_stream(rtp_stream);
}
public override JingleRtp.Crypto? generate_local_crypto() {
uint8[] key_and_salt = new uint8[30];
Crypto.randomize(key_and_salt);
return JingleRtp.Crypto.create(JingleRtp.Crypto.AES_CM_128_HMAC_SHA1_80, key_and_salt);
}
public override JingleRtp.Crypto? pick_remote_crypto(Gee.List<JingleRtp.Crypto> cryptos) {
foreach (JingleRtp.Crypto crypto in cryptos) {
if (crypto.is_valid) return crypto;
}
return null;
}
public override JingleRtp.Crypto? pick_local_crypto(JingleRtp.Crypto? remote) {
if (remote == null || !remote.is_valid) return null;
uint8[] key_and_salt = new uint8[30];
Crypto.randomize(key_and_salt);
return remote.rekey(key_and_salt);
}
}
|
