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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 supports(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, 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, encode_element);
}
debug("using %s to encode %s", encode_element, codec);
string decode_bin = codec_util.get_decode_bin_description(media, codec, 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, decode_element);
}
debug("using %s to decode %s", decode_element, codec);
supported_codecs.add(codec);
return true;
}
public async void add_if_supported(Gee.List<JingleRtp.PayloadType> list, string media, JingleRtp.PayloadType payload_type) {
if (yield supports(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") {
yield add_if_supported(list, media, new JingleRtp.PayloadType() {
channels = 2,
clockrate = 48000,
name = "opus",
id = 96
});
yield add_if_supported(list, media, new JingleRtp.PayloadType() {
channels = 1,
clockrate = 32000,
name = "speex",
id = 97
});
yield add_if_supported(list, media, new JingleRtp.PayloadType() {
channels = 1,
clockrate = 16000,
name = "speex",
id = 98
});
yield add_if_supported(list, media, new JingleRtp.PayloadType() {
channels = 1,
clockrate = 8000,
name = "speex",
id = 99
});
yield add_if_supported(list, media, new JingleRtp.PayloadType() {
channels = 1,
clockrate = 8000,
name = "PCMU",
id = 0
});
yield add_if_supported(list, media, new JingleRtp.PayloadType() {
channels = 1,
clockrate = 8000,
name = "PCMA",
id = 8
});
} else if (media == "video") {
yield add_if_supported(list, media, new JingleRtp.PayloadType() {
clockrate = 90000,
name = "H264",
id = 96
});
yield add_if_supported(list, media, new JingleRtp.PayloadType() {
clockrate = 90000,
name = "VP9",
id = 97
});
yield add_if_supported(list, media, new JingleRtp.PayloadType() {
clockrate = 90000,
name = "VP8",
id = 98
});
} 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 supports(media, type)) return type;
}
} else if (media == "video") {
foreach (JingleRtp.PayloadType type in payloads) {
if (yield supports(media, type)) return type;
}
} else {
warning("Unsupported media type: %s", media);
}
return null;
}
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 uint32 get_session_id(string id) {
// return (uint32) id.split("-")[0].to_int();
// }
//
// public string create_feed(string media, bool incoming) {
// init();
// string id = random_uuid();
// if (media == "audio") {
// id = "0-" + id;
// } else {
// id = "1-" + id;
// }
// MediaDevice? device = plugin.get_preferred_device(media, incoming);
// Feed feed;
// if (incoming) {
// if (media == "audio") {
// feed = new IncomingAudioFeed(id, this, device);
// } else if (media == "video") {
// feed = new IncomingVideoFeed(id, this, device);
// } else {
// critical("Incoming feed of media '%s' not supported", media);
// return id;
// }
// } else {
// if (media == "audio") {
// string? matching_incoming_feed_id = null;
// foreach (Feed match in plugin.feeds.values) {
// if (match is IncomingAudioFeed) {
// matching_incoming_feed_id = match.id;
// }
// }
// feed = new OutgoingAudioFeed(id, this, device);
// } else if (media == "video") {
// feed = new OutgoingVideoFeed(id, this, device);
// } else {
// critical("Outgoing feed of media '%s' not supported", media);
// return id;
// }
// }
// plugin.add_feed(id, feed);
// return id;
// }
//
// public void connect_feed(string id, JingleRtp.PayloadType payload, Jingle.DatagramConnection connection) {
// if (!plugin.feeds.has_key(id)) {
// critical("Tried to connect feed with id %s, but no such feed found", id);
// return;
// }
// Feed feed = plugin.feeds[id];
// feed.connect(payload, connection);
// }
//
// public void destroy_feed(string id) {
// if (!plugin.feeds.has_key(id)) {
// critical("Tried to destroy feed with id %s, but no such feed found", id);
// return;
// }
// Feed feed = plugin.feeds[id];
// feed.destroy();
// plugin.feeds.remove(id);
// }
}
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