optimize frame handling in agent_read()

ensure that the call is marked acknowledged when it goes to AST_STATE_UP even if AST_CONTROL_ANSWER is not received (if ackcall is disabled)


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@5413 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_agent.c

@@ -401,10 +401,14 @@ static struct ast_frame *agent_read(struct ast_channel *ast)
 			p->chan = NULL;
 			p->acknowledged = 0;
 		}
-	}
-	if (p->chan && f && (f->frametype == AST_FRAME_CONTROL) && (f->subclass == AST_CONTROL_ANSWER)) {
-/* TC */
-		ast_log(LOG_DEBUG, "Got answer on %s\n", p->chan->name);
+ 	} else {
+ 		/* if acknowledgement is not required, and the channel is up, we may have missed
+ 		   an AST_CONTROL_ANSWER (if there was one), so mark the call acknowledged anyway */
+ 		if (!p->ackcall && !p->acknowledged && p->chan->_state == AST_STATE_UP)
+  			p->acknowledged = 1;
+ 		switch (f->frametype) {
+ 		case AST_FRAME_CONTROL:
+ 			if (f->subclass == AST_CONTROL_ANSWER) {
  				if (p->ackcall) {
  					if (option_verbose > 2)
  						ast_verbose(VERBOSE_PREFIX_3 "%s answered, waiting for '#' to acknowledge\n", p->chan->name);
@@ -413,29 +417,32 @@ static struct ast_frame *agent_read(struct ast_channel *ast)
  					f = &null_frame;
  				} else {
  					p->acknowledged = 1;
-			ast_frfree(f);
-			f = &answer_frame;
  				}
  			}
-	if (f && (f->frametype == AST_FRAME_DTMF) && (f->subclass == '#')) {
-		if (!p->acknowledged) {
+ 			break;
+ 		case AST_FRAME_DTMF:
+ 			if (!p->acknowledged && (f->subclass == '#')) {
  				if (option_verbose > 2)
  					ast_verbose(VERBOSE_PREFIX_3 "%s acknowledged\n", p->chan->name);
  				p->acknowledged = 1;
  				ast_frfree(f);
  				f = &answer_frame;
-		}
-	}
-	if (f && (f->frametype == AST_FRAME_DTMF) && (f->subclass == '*')) {
-		/* * terminates call */
+ 			} else if (f->subclass == '*') {
+ 				/* terminates call */
  				ast_frfree(f);
  				f = NULL;
  			}
-	if (f && (f->frametype == AST_FRAME_VOICE) && !p->acknowledged) {
-		/* Don't pass along agent audio until call is acknowledged */
+ 			break;
+ 		case AST_FRAME_VOICE:
+ 			/* don't pass voice until the call is acknowledged */
+ 			if (!p->acknowledged) {
  				ast_frfree(f);
  				f = &null_frame;
  			}
+ 			break;
+  		}
+  	}
+
 	CLEANUP(ast,p);
 	if (p->chan && !p->chan->_bridge) {
 		if (strcasecmp(p->chan->type, "Local")) {