Hi all.
I'm facing problems when setting global preferred codecs. What I
would like to do is to strictly use specific codec (G.711 a-law) for
answering machine mode in my demo application. This is due to the fact
that messages that are played (i.e. "please leave your message after the
beep" stuff) are recorded using G.711 a-law codec on board. Here is what
I'm exactly doing in the app.
First, register all audio capabilities:
static struct {
int h323cap, ivanaCap, txFrames, rxFrames;
} cap_conv[] = {
{ OO_G711ULAW64K, MLAW, 20, 160 },
{ OO_G711ALAW64K, ALAW, 20, 160 },
{ OO_G729, G729, 20, 80 },
{ OO_G728, G728, 20, 160 },
{ OO_G726_40K, G726_40, 20, 80 },
{ OO_G726_32K, G726_32, 20, 80 },
{ OO_G726_24K, G726_24, 20, 80 },
{ OO_G726_16K, G726_16, 20, 80 },
{ OO_G7231, G723_63, 20, 80 }
};
OOCapPrefs codecList;
...
/* Add audio capabilities and store them */
codecList.index = SIZEOF_CAP_CONV;
for (unsigned i=0;i<SIZEOF_CAP_CONV;i++) {
ooCapabilityAddSimpleCapability(NULL,cap_conv[i].h323cap,
cap_conv[i].txFrames, cap_conv[i].rxFrames, FALSE, OORXANDTX,
&spcEpStartReceiveChannel, &spcEpStartTransmitChannel,
&spcEpStopReceiveChannel, &spcEpStopTransmitChannel, FALSE);
codecList.order[i] = cap_conv[i].h323cap;
}
When the application is running, I can turn on/off answering machine
mode like this:
m_answermachineenabled = !m_answermachineenabled;
if (m_answermachineenabled) {
ooH323EpEnableAutoAnswer();
ooChangeCapPrefOrder(NULL, OO_G711ALAW64K, 0);
}
else {
ooH323EpDisableAutoAnswer();
ooResetCapPrefs(NULL);
for (int i=0; i<codecList.index; i++)
ooAppendCapToCapPrefs(NULL, codecList.order[i]);
}
However, when I really enable answering machine mode, two endpoints
still negotiate wrong codec (OO_G711ULAW64K), i.e. the first registered
codec from cap_conv[]. Why is this happening? What am I doing wrong? I'm
always using faststart. Can this be a problem?
Regards,
Aleksandar
--
Aleksandar Sutic
phone: +381 65 311 2317
e-mail: [EMAIL PROTECTED]
web: www.sutic.dzaba.com
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