ubergames/ioef
0
0
Fork 0
mirror of https://github.com/UberGames/ioef.git synced 2024-11-27 22:42:09 +00:00
Code Issues Projects Releases Packages Wiki Activity

VoIP: attempt at changing voipPower calc and using it for VAD.

Browse source 
The Speex VAD sort of sucks, honestly, or I'm not using it right. Now
 trying this algorithm, after denoising:

    http://lists.xiph.org/pipermail/speex-dev/2006-March/004269.html

And I'll play around to find the threshold for considering a set of frames
 to be "voice" from there.

Also worth noting: we consider the power of the set of frames as a whole, so
 you need to sustain power for 0.25 seconds at a time, or it's not "voice."
This commit is contained in:
Ryan C. Gordon 2008-06-08 07:09:10 +00:00
parent fdfaff64f8
commit d4ee08b985
2 changed files with 12 additions and 22 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
code/client/cl_cgame.c
View file

@ -937,10 +937,6 @@ void CL_FirstSnapshot( void ) {
speex_preprocess_ctl(clc.speexPreprocessor,
SPEEX_PREPROCESS_SET_DENOISE, &i);
i = (cl_voipUseVAD->integer != 0);
speex_preprocess_ctl(clc.speexPreprocessor,
SPEEX_PREPROCESS_SET_VAD, &i);
for (i = 0; i < MAX_CLIENTS; i++) {
speex_bits_init(&clc.speexDecoderBits[i]);
speex_bits_reset(&clc.speexDecoderBits[i]);

30
code/client/cl_main.c
View file

@ -283,11 +283,8 @@ void CL_CaptureVoip(void)
return; // packet is pending transmission, don't record more yet.
if (cl_voipUseVAD->modified) {
int useVadi = (int) useVad;
speex_preprocess_ctl(clc.speexPreprocessor,
SPEEX_PREPROCESS_SET_VAD, &useVadi);
cl_voipUseVAD->modified = qfalse;
Cvar_Set("cl_voipSend", (useVad) ? "1" : "0");
cl_voipUseVAD->modified = qfalse;
}
if ((useVad) && (!cl_voipSend->integer))
@ -339,8 +336,7 @@ void CL_CaptureVoip(void)
// audio capture is always MONO16 (and that's what speex wants!).
// 2048 will cover 12 uncompressed frames in narrowband mode.
static int16_t sampbuffer[2048];
qboolean isVoice = qfalse;
int16_t voipPower = 0;
float voipPower = 0.0f;
int speexFrames = 0;
int wpos = 0;
int pos = 0;
@ -359,19 +355,15 @@ void CL_CaptureVoip(void)
int16_t *sampptr = &sampbuffer[pos];
int i, bytes;
// preprocess samples to remove noise...
speex_preprocess_run(clc.speexPreprocessor, sampptr);
// check the "power" of this packet...
for (i = 0; i < clc.speexFrameSize; i++) {
int16_t s = sampptr[i];
if (s < 0)
s = -s;
if (s > voipPower)
voipPower = s; // !!! FIXME: this isn't very clever.
const float s = fabs((float) sampptr[i]);
voipPower += s * s;
}
// preprocess samples to remove noise, check for voice...
if (speex_preprocess_run(clc.speexPreprocessor, sampptr))
isVoice = qtrue; // player is probably speaking.
// encode raw audio samples into Speex data...
speex_bits_reset(&clc.speexEncoderBits);
speex_encode_int(clc.speexEncoder, sampptr,
@ -389,10 +381,12 @@ void CL_CaptureVoip(void)
speexFrames++;
}
if ((useVad) && (!isVoice)) {
CL_VoipNewGeneration(); // no talk for at least 1/4 second.
clc.voipPower = voipPower / (32768.0f * 32768.0f *
((float) (clc.speexFrameSize * speexFrames)));
if ((useVad) && (clc.voipPower > 0.25f)) {
CL_VoipNewGeneration(); // no "talk" for at least 1/4 second.
} else {
clc.voipPower = ((float) voipPower) / 32767.0f;
clc.voipOutgoingDataSize = wpos;
clc.voipOutgoingDataFrames = speexFrames;