From 975d4d97e4b9459c3d21b4dc3ecd807e9c330d9a Mon Sep 17 00:00:00 2001
From: Zack Middleton <zturtleman@gmail.com>
Date: Tue, 10 Dec 2013 21:14:13 -0600
Subject: 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.)
---
 src/client/client.h | 21 +++++++++++----------
 1 file changed, 11 insertions(+), 10 deletions(-)

(limited to 'src/client/client.h')

diff --git a/src/client/client.h b/src/client/client.h
index 541dca40..b4016467 100644
--- a/src/client/client.h
+++ b/src/client/client.h
@@ -36,8 +36,7 @@ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 #endif /* USE_CURL */
 
 #ifdef USE_VOIP
-#include "speex/speex.h"
-#include "speex/speex_preprocess.h"
+#include <opus.h>
 #endif
 
 // file full of random crap that gets used to create cl_guid
@@ -241,14 +240,11 @@ typedef struct {
 
 #ifdef USE_VOIP
 	qboolean voipEnabled;
-	qboolean speexInitialized;
-	int speexFrameSize;
-	int speexSampleRate;
+	qboolean voipCodecInitialized;
 
 	// incoming data...
 	// !!! FIXME: convert from parallel arrays to array of a struct.
-	SpeexBits speexDecoderBits[MAX_CLIENTS];
-	void *speexDecoder[MAX_CLIENTS];
+	OpusDecoder *opusDecoder[MAX_CLIENTS];
 	byte voipIncomingGeneration[MAX_CLIENTS];
 	int voipIncomingSequence[MAX_CLIENTS];
 	float voipGain[MAX_CLIENTS];
@@ -260,9 +256,7 @@ typedef struct {
 	// then we are sending to clientnum i.
 	uint8_t voipTargets[(MAX_CLIENTS + 7) / 8];
 	uint8_t voipFlags;
-	SpeexPreprocessState *speexPreprocessor;
-	SpeexBits speexEncoderBits;
-	void *speexEncoder;
+	OpusEncoder *opusEncoder;
 	int voipOutgoingDataSize;
 	int voipOutgoingDataFrames;
 	int voipOutgoingSequence;
@@ -449,6 +443,13 @@ extern	cvar_t	*cl_voipGainDuringCapture;
 extern	cvar_t	*cl_voipCaptureMult;
 extern	cvar_t	*cl_voipShowMeter;
 extern	cvar_t	*cl_voip;
+
+// 20ms at 48k
+#define VOIP_MAX_FRAME_SAMPLES		( 20 * 48 )
+
+// 3 frame is 60ms of audio, the max opus will encode at once
+#define VOIP_MAX_PACKET_FRAMES		3
+#define VOIP_MAX_PACKET_SAMPLES		( VOIP_MAX_FRAME_SAMPLES * VOIP_MAX_PACKET_FRAMES )
 #endif
 
 //=================================================
-- 
cgit