[Freeswitch-dev] Bug in Freeswitch rev. 4107 !? switch_channel_answer() causes one-way-audio

[Brian West]

You do realize this isn't a bug.  Its by design.  You never  
automatically answer a channel before the otherside has answered or  
an explicit answered is issued from your application/ivr.  That whole  
needing accurate CDR records is shot to hell with this patch.

/b

On Feb 2, 2007, at 9:15 AM, Dirk Schenkewitz wrote:

> Hi all,
>
> today I noticed that audio works only in one direction if  
> mod_bridgecall
> contains a call to switch_channel_answer().
>
> I don't know yet at which revision this stopped working. The patch to
> demonstrate/trigger the problem is a one-liner (plus a comment),  
> please
> see attachment. Without this line, mod_bridgecall works fine - with  
> it,
> I don't hear the other party (when it answers the call). Of course,
> calling switch_channel_answer() makes no sense on its own but it is
> needed if you want to send dtmf data to freeswitch before the other
> party answers... or even before calling another party.
>
> If that's already enough to find the cause and fix it, please do.  
> In the
> meantime I try going back some revisions...
>
> Best regards
> Dirk
> --- mod_bridgecall.c.~1~	2007-01-15 14:29:58.000000000 +0100
> +++ mod_bridgecall.c	2007-02-02 15:24:08.000000000 +0100
> @@ -70,6 +70,9 @@
>  		}
>  	}
>
> +    switch_channel_answer(caller_channel);
> +    // now I can enter dtmf date BEFORE the other side accepts the  
> call - but audio will go in only one direction
> +
>  	if (switch_ivr_originate(session, &peer_session, &cause, data,  
> timelimit, NULL, NULL, NULL, NULL) != SWITCH_STATUS_SUCCESS) {
>  		switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_INFO,  
> "Originate Failed.  Cause: %s\n", switch_channel_cause2str(cause));
>          if (!do_continue && cause != SWITCH_CAUSE_NO_ANSWER) {
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