Use Opus for VoIP

Server/client VoIP protocol is handled by adding new cvars
cl_voipProtocol and sv_voipProtocol, sv_voip and cl_voip
are used to auto set/clear them. All users need to touch
are cl/sv_voip as 0 or 1 just like before.

Old Speex VoIP packets in demos are skipped.
New VoIP packets are skipped in demos if sv_voipProtocol
doesn't match cl_voipProtocol.

Notable difference between usage of speex and opus codecs,
when using Speex client would be sent 80ms at a time.
Using Opus, 60ms is sent at a time. This was changed because
the Opus codec supports encoding up to 60ms at a time.
(Simpler to send only one codec frame in a packet.)

1 files changed, 4 insertions, 2 deletions

diff --git a/src/qcommon/qcommon.h b/src/qcommon/qcommon.h
index d71531b6..1b4a5a16 100644
--- a/src/qcommon/qcommon.h
+++ b/src/qcommon/qcommon.h
@@ -279,7 +279,8 @@ enum svc_ops_e {
 	svc_EOF,
 
 // new commands, supported only by ioquake3 protocol but not legacy
-	svc_voip,     // not wrapped in USE_VOIP, so this value is reserved.
+	svc_voipSpeex,     // not wrapped in USE_VOIP, so this value is reserved.
+	svc_voipOpus,      //
 };
 
 
@@ -295,7 +296,8 @@ enum clc_ops_e {
 	clc_EOF,
 
 // new commands, supported only by ioquake3 protocol but not legacy
-	clc_voip,   // not wrapped in USE_VOIP, so this value is reserved.
+	clc_voipSpeex,   // not wrapped in USE_VOIP, so this value is reserved.
+	clc_voipOpus,    //
 };
 
 /*