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compute a new parameter which keeps history of energy between 8 and 16KHz

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git-svn-id: svn+ssh://svn.savannah.nongnu.org/linphone/trunk@395 3f6dc0c8-ddfe-455d-9043-3cd528dc4637
This commit is contained in:
aymeric 2009-03-31 13:52:32 +00:00
parent 2e94a354fd
commit 986eb74288
1 changed files with 20 additions and 2 deletions
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22
linphone/mediastreamer2/src/msconf.c
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@ -65,6 +65,7 @@ typedef struct Channel{
#endif
float energy;
double average_psd;
} Channel;
@ -164,6 +165,7 @@ static void channel_uninit(Channel *chan){
ms_bufferizer_uninit(&chan->buff);
chan->is_speaking=0;
chan->energy=0;
chan->average_psd=0;
#ifndef DISABLE_SPEEX
if (chan->speex_pp!=NULL)
speex_preprocess_state_destroy(chan->speex_pp);
@ -284,13 +286,17 @@ static double powerspectrum_stat_beyond8K(struct Channel *chan){
ortp_free(ps);
//ms_message("average power spectrum on half highest values ONLY: stat=%.3lf", 108.064 - mystat);
/* values:
Maximum: 108,064 low volume on high frequency.
Decrease when volume increase. */
/* return value between 0 and 108,064? */
return 108.064-mystat;
mystat = 108.064-mystat;
chan->average_psd=(mystat*mystat*coef) + (1.0-coef)*chan->average_psd;
//ms_message("average power spectrum on half highest values ONLY: stat=%.3lf", chan->average_psd);
return mystat;
}
#endif
@ -403,6 +409,7 @@ static void conf_sum(MSFilter *f, ConfState *s){
if (s->enable_halfduplex>0)
{
double mystat = powerspectrum_stat_beyond8K(chan);
#if 0
if (mystat>12)
{
ms_message("is_speaking (chan=%i) -> on/stat=%.3lf", i, mystat);
@ -412,6 +419,17 @@ static void conf_sum(MSFilter *f, ConfState *s){
{
s->channels[0].is_speaking--;
}
#else
if (chan->average_psd>s->vad_prob_start)
{
ms_message("is_speaking (chan=%i) -> on/stat=%.3lf", i, chan->average_psd);
s->channels[0].is_speaking=20; /* keep RTP unmuted for the next few ms */
}
else if (chan->average_psd<s->vad_prob_continue)
{
s->channels[0].is_speaking--;
}
#endif
}
}