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confbridge: Fix MOH on simultaneous user entry to a new conference.

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When two users entered a new conference simultaneously, one of the callers
hears MOH.  This happened if two unmarked users entered simultaneously and
also if a waitmarked and a marked user entered simultaneously.

* Created a confbridge internal MOH API to eliminate the inlined MOH
handling code.  Note that the conference mixing bridge needs to be locked
when actually starting/stopping MOH because there is a small window
between the conference join unsuspend MOH and actually joining the mixing
bridge.

* Created the concept of suspended MOH so it can be interrupted while
conference join announcements to the user and DTMF features can operate.

* Suspend any MOH until the user is about to actually join the mixing
bridge of the conference.  This way any pre-join file playback does not
need to worry about MOH.

* Made post-join actions only play deferred entry announcement files.
Changing the user/conference state during that time is not protected or
controlled by the state machine.

(closes issue ASTERISK-20606)
Reported by: Eugenia Belova
Tested by: rmudgett

Review: https://reviewboard.asterisk.org/r/2232/
........

Merged revisions 377992 from http://svn.asterisk.org/svn/asterisk/branches/10


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/11@377993 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Richard Mudgett
2012-12-13 21:04:16 +00:00
parent d3ab29934c
commit 797e403982
5 changed files with 172 additions and 49 deletions
Download Patch File Download Diff File Expand all files Collapse all files

143
apps/app_confbridge.c
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@@ -900,6 +900,94 @@ static int handle_conf_user_leave(struct conference_bridge_user *cbu)
return 0;
}
void conf_moh_stop(struct conference_bridge_user *user)
{
user->playing_moh = 0;
if (!user->suspended_moh) {
int in_bridge;
/*
* Locking the ast_bridge here is the only way to hold off the
* call to ast_bridge_join() in confbridge_exec() from
* interfering with the bridge and MOH operations here.
*/
ast_bridge_lock(user->conference_bridge->bridge);
/*
* Temporarily suspend the user from the bridge so we have
* control to stop MOH if needed.
*/
in_bridge = !ast_bridge_suspend(user->conference_bridge->bridge, user->chan);
ast_moh_stop(user->chan);
if (in_bridge) {
ast_bridge_unsuspend(user->conference_bridge->bridge, user->chan);
}
ast_bridge_unlock(user->conference_bridge->bridge);
}
}
void conf_moh_start(struct conference_bridge_user *user)
{
user->playing_moh = 1;
if (!user->suspended_moh) {
int in_bridge;
/*
* Locking the ast_bridge here is the only way to hold off the
* call to ast_bridge_join() in confbridge_exec() from
* interfering with the bridge and MOH operations here.
*/
ast_bridge_lock(user->conference_bridge->bridge);
/*
* Temporarily suspend the user from the bridge so we have
* control to start MOH if needed.
*/
in_bridge = !ast_bridge_suspend(user->conference_bridge->bridge, user->chan);
ast_moh_start(user->chan, user->u_profile.moh_class, NULL);
if (in_bridge) {
ast_bridge_unsuspend(user->conference_bridge->bridge, user->chan);
}
ast_bridge_unlock(user->conference_bridge->bridge);
}
}
/*!
* \internal
* \brief Unsuspend MOH for the conference user.
*
* \param user Conference user to unsuspend MOH on.
*
* \return Nothing
*/
static void conf_moh_unsuspend(struct conference_bridge_user *user)
{
ao2_lock(user->conference_bridge);
if (--user->suspended_moh == 0 && user->playing_moh) {
ast_moh_start(user->chan, user->u_profile.moh_class, NULL);
}
ao2_unlock(user->conference_bridge);
}
/*!
* \internal
* \brief Suspend MOH for the conference user.
*
* \param user Conference user to suspend MOH on.
*
* \return Nothing
*/
static void conf_moh_suspend(struct conference_bridge_user *user)
{
ao2_lock(user->conference_bridge);
if (user->suspended_moh++ == 0 && user->playing_moh) {
ast_moh_stop(user->chan);
}
ao2_unlock(user->conference_bridge);
}
int conf_handle_first_marked_common(struct conference_bridge_user *cbu)
{
if (!ast_test_flag(&cbu->u_profile, USER_OPT_QUIET) && play_prompt_to_user(cbu, conf_get_sound(CONF_SOUND_PLACE_IN_CONF, cbu->b_profile.sounds))) {
@@ -910,19 +998,12 @@ int conf_handle_first_marked_common(struct conference_bridge_user *cbu)
int conf_handle_inactive_waitmarked(struct conference_bridge_user *cbu)
{
/* Be sure we are muted so we can't talk to anybody else waiting */
cbu->features.mute = 1;
/* If we have not been quieted play back that they are waiting for the leader */
if (!ast_test_flag(&cbu->u_profile, USER_OPT_QUIET) && play_prompt_to_user(cbu,
conf_get_sound(CONF_SOUND_WAIT_FOR_LEADER, cbu->b_profile.sounds))) {
/* user hungup while the sound was playing */
return -1;
}
/* Start music on hold if needed */
if (ast_test_flag(&cbu->u_profile, USER_OPT_MUSICONHOLD)) {
ast_moh_start(cbu->chan, cbu->u_profile.moh_class, NULL);
cbu->playing_moh = 1;
}
return 0;
}
@@ -961,11 +1042,8 @@ void conf_handle_second_active(struct conference_bridge *conference_bridge)
/* If we are the second participant we may need to stop music on hold on the first */
struct conference_bridge_user *first_participant = AST_LIST_FIRST(&conference_bridge->active_list);
/* Temporarily suspend the above participant from the bridge so we have control to stop MOH if needed */
if (ast_test_flag(&first_participant->u_profile, USER_OPT_MUSICONHOLD) && !ast_bridge_suspend(conference_bridge->bridge, first_participant->chan)) {
first_participant->playing_moh = 0;
ast_moh_stop(first_participant->chan);
ast_bridge_unsuspend(conference_bridge->bridge, first_participant->chan);
if (ast_test_flag(&first_participant->u_profile, USER_OPT_MUSICONHOLD)) {
conf_moh_stop(first_participant);
}
if (!ast_test_flag(&first_participant->u_profile, USER_OPT_STARTMUTED)) {
first_participant->features.mute = 0;
@@ -1090,6 +1168,13 @@ static struct conference_bridge *join_conference_bridge(const char *name, struct
ao2_lock(conference_bridge);
/*
* Suspend any MOH until the user actually joins the bridge of
* the conference. This way any pre-join file playback does not
* need to worry about MOH.
*/
conference_bridge_user->suspended_moh = 1;
if (handle_conf_user_join(conference_bridge_user)) {
/* Invalid event, nothing was done, so we don't want to process a leave. */
ao2_unlock(conference_bridge);
@@ -1521,21 +1606,18 @@ static int confbridge_exec(struct ast_channel *chan, const char *data)
/* Play the Join sound to both the conference and the user entering. */
if (!quiet) {
const char *join_sound = conf_get_sound(CONF_SOUND_JOIN, conference_bridge_user.b_profile.sounds);
if (conference_bridge_user.playing_moh) {
ast_moh_stop(chan);
}
ast_stream_and_wait(chan, join_sound, "");
ast_autoservice_start(chan);
play_sound_file(conference_bridge, join_sound);
ast_autoservice_stop(chan);
if (conference_bridge_user.playing_moh) {
ast_moh_start(chan, conference_bridge_user.u_profile.moh_class, NULL);
}
}
/* See if we need to automatically set this user as a video source or not */
handle_video_on_join(conference_bridge, conference_bridge_user.chan, ast_test_flag(&conference_bridge_user.u_profile, USER_OPT_MARKEDUSER));
conf_moh_unsuspend(&conference_bridge_user);
/* Join our conference bridge for real */
send_join_event(conference_bridge_user.chan, conference_bridge->name);
ast_bridge_join(conference_bridge->bridge,
@@ -1916,25 +1998,14 @@ int conf_handle_dtmf(struct ast_bridge_channel *bridge_channel,
struct conf_menu_entry *menu_entry,
struct conf_menu *menu)
{
struct conference_bridge *conference_bridge = conference_bridge_user->conference_bridge;
/* See if music on hold is playing */
ao2_lock(conference_bridge);
if (conference_bridge_user->playing_moh) {
/* MOH is going, let's stop it */
ast_moh_stop(bridge_channel->chan);
}
ao2_unlock(conference_bridge);
conf_moh_suspend(conference_bridge_user);
/* execute the list of actions associated with this menu entry */
execute_menu_entry(conference_bridge, conference_bridge_user, bridge_channel, menu_entry, menu);
execute_menu_entry(conference_bridge_user->conference_bridge, conference_bridge_user, bridge_channel, menu_entry, menu);
/* See if music on hold needs to be started back up again */
ao2_lock(conference_bridge);
if (conference_bridge_user->playing_moh) {
ast_moh_start(bridge_channel->chan, conference_bridge_user->u_profile.moh_class, NULL);
}
ao2_unlock(conference_bridge);
conf_moh_unsuspend(conference_bridge_user);
return 0;
}
@@ -2826,13 +2897,7 @@ void conf_mute_only_active(struct conference_bridge *conference_bridge)
/* Turn on MOH/mute if the single participant is set up for it */
if (ast_test_flag(&only_participant->u_profile, USER_OPT_MUSICONHOLD)) {
only_participant->features.mute = 1;
if (!ast_channel_internal_bridge(only_participant->chan) || !ast_bridge_suspend(conference_bridge->bridge, only_participant->chan)) {
ast_moh_start(only_participant->chan, only_participant->u_profile.moh_class, NULL);
only_participant->playing_moh = 1;
if (ast_channel_internal_bridge(only_participant->chan)) {
ast_bridge_unsuspend(conference_bridge->bridge, only_participant->chan);
}
}
conf_moh_start(only_participant);
}
}