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Add FEC and PLP support for Opus encoding (#1264)

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* Add FEC and PLP support for Opus encoding

* Silently fail if the Opus engine doesn't support CTL

* Fixed inversed max/min functions
This commit is contained in:
aemino
2017-04-02 10:43:46 -07:00
committed by Crawl
parent 2ff1f3dcde
commit 8716702b59
3 changed files with 35 additions and 0 deletions
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17
src/client/voice/opus/BaseOpusEngine.js
View File

@@ -1,6 +1,23 @@
class BaseOpus {
constructor(player) {
this.player = player;
this.ctl = {
FEC: 4012,
PLP: 4014,
};
}
init() {
try {
// enable FEC (forward error correction)
this.setFEC(true);
// set PLP (expected packet loss percentage) to 15%
this.setPLP(0.15);
} catch (err) {
// Opus engine likely has no support for libopus CTL
}
}
encode(buffer) {

9
src/client/voice/opus/NodeOpusEngine.js
View File

@@ -11,6 +11,15 @@ class NodeOpusEngine extends OpusEngine {
throw err;
}
this.encoder = new opus.OpusEncoder(48000, 2);
super.init();
}
setFEC(enabled) {
this.encoder.applyEncoderCTL(this.ctl.FEC, enabled ? 1 : 0);
}
setPLP(percent) {
this.encoder.applyEncoderCTL(this.ctl.PLP, Math.min(100, Math.max(0, percent * 100)));
}
encode(buffer) {

9
src/client/voice/opus/OpusScriptEngine.js
View File

@@ -11,6 +11,15 @@ class OpusScriptEngine extends OpusEngine {
throw err;
}
this.encoder = new OpusScript(48000, 2);
super.init();
}
setFEC(enabled) {
this.encoder.encoderCTL(this.ctl.FEC, enabled ? 1 : 0);
}
setPLP(percent) {
this.encoder.encoderCTL(this.ctl.PLP, Math.min(100, Math.max(0, percent * 100)));
}
encode(buffer) {