From c50799fcf72efcb70498ba21c805e74af4ea9c6a Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <icculus@icculus.org>
Date: Sat, 7 Jun 2008 14:39:49 +0000
Subject: [PATCH] VoIP: Initial work on adding Speex preprocessor.

---
 code/client/cl_cgame.c | 10 +++++++++-
 code/client/cl_main.c  |  4 +++-
 code/client/client.h   |  2 ++
 3 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/code/client/cl_cgame.c b/code/client/cl_cgame.c
index 1c7dd2b1..18a96308 100644
--- a/code/client/cl_cgame.c
+++ b/code/client/cl_cgame.c
@@ -922,12 +922,20 @@ void CL_FirstSnapshot( void ) {
 		int i;
 		speex_bits_init(&clc.speexEncoderBits);
 		speex_bits_reset(&clc.speexEncoderBits);
+
 		clc.speexEncoder = speex_encoder_init(&speex_nb_mode);
 
 		speex_encoder_ctl(clc.speexEncoder, SPEEX_GET_FRAME_SIZE,
 		                  &clc.speexFrameSize);
 		speex_encoder_ctl(clc.speexEncoder, SPEEX_GET_SAMPLING_RATE,
-		                  &clc.speexSamplingRate);
+		                  &clc.speexSampleRate);
+
+		clc.speexPreprocessor = speex_preprocess_state_init(clc.speexFrameSize,
+		                                                  clc.speexSampleRate);
+
+		i = 1;
+		speex_preprocess_ctl(clc.speexPreprocessor,
+		                     SPEEX_PREPROCESS_SET_DENOISE, &i);
 
 		for (i = 0; i < MAX_CLIENTS; i++) {
 			speex_bits_init(&clc.speexDecoderBits[i]);
diff --git a/code/client/cl_main.c b/code/client/cl_main.c
index 01295583..8d72ed4e 100644
--- a/code/client/cl_main.c
+++ b/code/client/cl_main.c
@@ -345,6 +345,8 @@ void CL_CaptureVoip(void)
 						voipPower = s;  // !!! FIXME: this isn't very clever.
 				}
 
+				speex_preprocess_run(clc.speexPreprocessor, &sampbuffer[pos]);
+
 				// Encode raw audio samples into Speex data...
 				speex_bits_reset(&clc.speexEncoderBits);
 				speex_encode_int(clc.speexEncoder, &sampbuffer[pos],
@@ -1136,12 +1138,12 @@ void CL_Disconnect( qboolean showMainMenu ) {
 		int i;
 		speex_bits_destroy(&clc.speexEncoderBits);
 		speex_encoder_destroy(clc.speexEncoder);
+		speex_preprocess_state_destroy(clc.speexPreprocessor);
 		for (i = 0; i < MAX_CLIENTS; i++) {
 			speex_bits_destroy(&clc.speexDecoderBits[i]);
 			speex_decoder_destroy(clc.speexDecoder[i]);
 		}
 	}
-
 	Cmd_RemoveCommand ("voip");
 #endif
 
diff --git a/code/client/client.h b/code/client/client.h
index 9e9b2127..3df48741 100644
--- a/code/client/client.h
+++ b/code/client/client.h
@@ -36,6 +36,7 @@ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 
 #if USE_VOIP
 #include "speex/speex.h"
+#include "speex/speex_preprocess.h"
 #endif
 
 // file full of random crap that gets used to create cl_guid
@@ -248,6 +249,7 @@ typedef struct {
 	int voipTarget1;  // these three ints make up a bit mask of 92 bits.
 	int voipTarget2;  //  the bits say who a VoIP pack is addressed to:
 	int voipTarget3;  //  (1 << clientnum). See cl_voipSendTarget cvar.
+	SpeexPreprocessState *speexPreprocessor;
 	SpeexBits speexEncoderBits;
 	void *speexEncoder;
 	int voipOutgoingDataSize;