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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 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[] keyAndSalt = new uint8[30];
Crypto.randomize(keyAndSalt);
return JingleRtp.Crypto.create(JingleRtp.Crypto.AES_CM_128_HMAC_SHA1_80, keyAndSalt);
}
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[] keyAndSalt = new uint8[30];
Crypto.randomize(keyAndSalt);
return remote.rekey(keyAndSalt);
}
}
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