From 5209e56a4c8a2b160892b965e293209dcadd276fdc67d3b10fa56c62ac91b2a3 Mon Sep 17 00:00:00 2001
From: Sergey Matveev <stargrave@stargrave.org>
Date: Thu, 11 Apr 2024 19:37:31 +0300
Subject: [PATCH] Seems DTX won't harm

---
 cmd/client/{sound.go => audio.go} | 4 ++++
 cmd/client/main.go                | 4 ++++
 doc/proto.texi                    | 3 ++-
 3 files changed, 10 insertions(+), 1 deletion(-)
 rename cmd/client/{sound.go => audio.go} (95%)

diff --git a/cmd/client/sound.go b/cmd/client/audio.go
similarity index 95%
rename from cmd/client/sound.go
rename to cmd/client/audio.go
index d8c8bee..0b41d02 100644
--- a/cmd/client/sound.go
+++ b/cmd/client/audio.go
@@ -31,6 +31,10 @@ func newOpusEnc() *opus.Encoder {
 	if err != nil {
 		log.Fatal(err)
 	}
+	err = enc.SetDTX(true)
+	if err != nil {
+		log.Fatal(err)
+	}
 	err = enc.SetBitrate(vors.Bitrate)
 	if err != nil {
 		log.Fatal(err)
diff --git a/cmd/client/main.go b/cmd/client/main.go
index bd7fba6..ceb8563 100644
--- a/cmd/client/main.go
+++ b/cmd/client/main.go
@@ -533,6 +533,10 @@ func main() {
 			if err != nil {
 				log.Fatal(err)
 			}
+			if n <= 2 {
+				// DTX
+				continue
+			}
 
 			incr(nonce[len(nonce)-3:])
 			copy(buf, nonce[len(nonce)-4:])
diff --git a/doc/proto.texi b/doc/proto.texi
index f3c1209..ead9def 100644
--- a/doc/proto.texi
+++ b/doc/proto.texi
@@ -3,7 +3,8 @@
 
 VoRS uses Opus codec with 20ms frames with 48kHz 1ch 16-bit S-LE sound.
 It uses native @code{libopus}'es Packet Loss Concealment (PLC) feature
-if number of lost frame does not exceed 32 count.
+if number of lost frame does not exceed 32 count. DTX (discontinuous
+transmission) is also on.
 
 Each frame has single byte stream identifier (unique identifier of the
 participant) and 24-bit big-endian packet counter. Reordered packets are
-- 
2.48.1