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bridge_native_rtp: Fix audio issues when moving from remote bridge to softmix

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When a native RTP bridge that is remotely bridging its participants switches
to a softmix bridge, it may not properly re-INVITE the media for one or both
participants back to Asterisk. This is due to the current bridge_native_rtp
code only re-INVITEs if it believes the channel will survive the bridge
operation. Currently, that code is failing, as it expects the channels to
have a soft hangup flag set on it indicating that a redirect has occurred
or that the channel is going to leave the bridge. (The code did not take into
account a smart bridge operation).

This patch also renames a few things to be more reflective of the underlying
types.

Review: https://reviewboard.asterisk.org/r/3997/

ASTERISK-24327 #close
........

Merged revisions 425760 from http://svn.asterisk.org/svn/asterisk/branches/12
........

Merged revisions 425761 from http://svn.asterisk.org/svn/asterisk/branches/13


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@425762 65c4cc65-6c06-0410-ace0-fbb531ad65f3
changes/42/42/1
Matthew Jordan 11 years ago
parent 2ccbdd2624
commit df59a71b83
1 changed files with 49 additions and 53 deletions
Show Stats Download Patch File Download Diff File

102
bridges/bridge_native_rtp.c
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@ -127,8 +127,8 @@ static enum ast_rtp_glue_result native_rtp_bridge_get(struct ast_channel *c0, st
*/
static void native_rtp_bridge_start(struct ast_bridge *bridge, struct ast_channel *target)
{
struct ast_bridge_channel *c0 = AST_LIST_FIRST(&bridge->channels);
struct ast_bridge_channel *c1 = AST_LIST_LAST(&bridge->channels);
struct ast_bridge_channel *bc0 = AST_LIST_FIRST(&bridge->channels);
struct ast_bridge_channel *bc1 = AST_LIST_LAST(&bridge->channels);
enum ast_rtp_glue_result native_type;
struct ast_rtp_glue *glue0, *glue1;
RAII_VAR(struct ast_rtp_instance *, instance0, NULL, ao2_cleanup);
@ -140,12 +140,12 @@ static void native_rtp_bridge_start(struct ast_bridge *bridge, struct ast_channe
RAII_VAR(struct ast_format_cap *, cap0, ast_format_cap_alloc(AST_FORMAT_CAP_FLAG_DEFAULT), ao2_cleanup);
RAII_VAR(struct ast_format_cap *, cap1, ast_format_cap_alloc(AST_FORMAT_CAP_FLAG_DEFAULT), ao2_cleanup);
if (c0 == c1) {
if (bc0 == bc1) {
return;
}
ast_channel_lock_both(c0->chan, c1->chan);
native_type = native_rtp_bridge_get(c0->chan, c1->chan, &glue0, &glue1, &instance0, &instance1, &vinstance0, &vinstance1);
ast_channel_lock_both(bc0->chan, bc1->chan);
native_type = native_rtp_bridge_get(bc0->chan, bc1->chan, &glue0, &glue1, &instance0, &instance1, &vinstance0, &vinstance1);
switch (native_type) {
case AST_RTP_GLUE_RESULT_LOCAL:
@ -158,23 +158,23 @@ static void native_rtp_bridge_start(struct ast_bridge *bridge, struct ast_channe
ast_rtp_instance_set_bridged(instance0, instance1);
ast_rtp_instance_set_bridged(instance1, instance0);
ast_debug(2, "Locally RTP bridged '%s' and '%s' in stack\n",
ast_channel_name(c0->chan), ast_channel_name(c1->chan));
ast_channel_name(bc0->chan), ast_channel_name(bc1->chan));
break;
case AST_RTP_GLUE_RESULT_REMOTE:
if (glue0->get_codec) {
glue0->get_codec(c0->chan, cap0);
glue0->get_codec(bc0->chan, cap0);
}
if (glue1->get_codec) {
glue1->get_codec(c1->chan, cap1);
glue1->get_codec(bc1->chan, cap1);
}
/* If we have a target, it's the channel that received the UNHOLD or UPDATE_RTP_PEER frame and was told to resume */
if (!target) {
glue0->update_peer(c0->chan, instance1, vinstance1, tinstance1, cap1, 0);
glue1->update_peer(c1->chan, instance0, vinstance0, tinstance0, cap0, 0);
glue0->update_peer(bc0->chan, instance1, vinstance1, tinstance1, cap1, 0);
glue1->update_peer(bc1->chan, instance0, vinstance0, tinstance0, cap0, 0);
ast_debug(2, "Remotely bridged '%s' and '%s' - media will flow directly between them\n",
ast_channel_name(c0->chan), ast_channel_name(c1->chan));
ast_channel_name(bc0->chan), ast_channel_name(bc1->chan));
} else {
/*
* If a target was provided, it is the recipient of an unhold or an update and needs to have
@ -182,10 +182,10 @@ static void native_rtp_bridge_start(struct ast_bridge *bridge, struct ast_channe
* already set up to handle the new media path or will have its own set of updates independent
* of this pass.
*/
if (c0->chan == target) {
glue0->update_peer(c0->chan, instance1, vinstance1, tinstance1, cap1, 0);
if (bc0->chan == target) {
glue0->update_peer(bc0->chan, instance1, vinstance1, tinstance1, cap1, 0);
} else {
glue1->update_peer(c1->chan, instance0, vinstance0, tinstance0, cap0, 0);
glue1->update_peer(bc1->chan, instance0, vinstance0, tinstance0, cap0, 0);
}
}
break;
@ -193,14 +193,14 @@ static void native_rtp_bridge_start(struct ast_bridge *bridge, struct ast_channe
break;
}
ast_channel_unlock(c0->chan);
ast_channel_unlock(c1->chan);
ast_channel_unlock(bc0->chan);
ast_channel_unlock(bc1->chan);
}
static void native_rtp_bridge_stop(struct ast_bridge *bridge, struct ast_channel *target)
{
struct ast_bridge_channel *c0 = AST_LIST_FIRST(&bridge->channels);
struct ast_bridge_channel *c1 = AST_LIST_LAST(&bridge->channels);
struct ast_bridge_channel *bc0 = AST_LIST_FIRST(&bridge->channels);
struct ast_bridge_channel *bc1 = AST_LIST_LAST(&bridge->channels);
enum ast_rtp_glue_result native_type;
struct ast_rtp_glue *glue0, *glue1 = NULL;
RAII_VAR(struct ast_rtp_instance *, instance0, NULL, ao2_cleanup);
@ -208,12 +208,12 @@ static void native_rtp_bridge_stop(struct ast_bridge *bridge, struct ast_channel
RAII_VAR(struct ast_rtp_instance *, vinstance0, NULL, ao2_cleanup);
RAII_VAR(struct ast_rtp_instance *, vinstance1, NULL, ao2_cleanup);
if (c0 == c1) {
if (bc0 == bc1) {
return;
}
ast_channel_lock_both(c0->chan, c1->chan);
native_type = native_rtp_bridge_get(c0->chan, c1->chan, &glue0, &glue1, &instance0, &instance1, &vinstance0, &vinstance1);
ast_channel_lock_both(bc0->chan, bc1->chan);
native_type = native_rtp_bridge_get(bc0->chan, bc1->chan, &glue0, &glue1, &instance0, &instance1, &vinstance0, &vinstance1);
switch (native_type) {
case AST_RTP_GLUE_RESULT_LOCAL:
@ -230,21 +230,17 @@ static void native_rtp_bridge_stop(struct ast_bridge *bridge, struct ast_channel
break;
case AST_RTP_GLUE_RESULT_REMOTE:
if (!target) {
if (ast_channel_is_leaving_bridge(c0->chan)) {
glue0->update_peer(c0->chan, NULL, NULL, NULL, NULL, 0);
}
if (glue1 && ast_channel_is_leaving_bridge(c1->chan)) {
glue1->update_peer(c1->chan, NULL, NULL, NULL, NULL, 0);
}
glue0->update_peer(bc0->chan, NULL, NULL, NULL, NULL, 0);
glue1->update_peer(bc1->chan, NULL, NULL, NULL, NULL, 0);
} else {
/*
* If a target was provided, it is being put on hold and should expect to
* receive mediafrom sterisk instead of what it was previously connected to.
* receive media from Asterisk instead of what it was previously connected to.
*/
if (c0->chan == target) {
glue0->update_peer(c0->chan, NULL, NULL, NULL, NULL, 0);
} else if (glue1) {
glue1->update_peer(c1->chan, NULL, NULL, NULL, NULL, 0);
if (bc0->chan == target) {
glue0->update_peer(bc0->chan, NULL, NULL, NULL, NULL, 0);
} else {
glue1->update_peer(bc1->chan, NULL, NULL, NULL, NULL, 0);
}
}
break;
@ -253,10 +249,10 @@ static void native_rtp_bridge_stop(struct ast_bridge *bridge, struct ast_channel
}
ast_debug(2, "Discontinued RTP bridging of '%s' and '%s' - media will flow through Asterisk core\n",
ast_channel_name(c0->chan), ast_channel_name(c1->chan));
ast_channel_name(bc0->chan), ast_channel_name(bc1->chan));
ast_channel_unlock(c0->chan);
ast_channel_unlock(c1->chan);
ast_channel_unlock(bc0->chan);
ast_channel_unlock(bc1->chan);
}
/*! \brief Frame hook that is called to intercept hold/unhold */
@ -304,8 +300,8 @@ static int native_rtp_bridge_capable(struct ast_channel *chan)
static int native_rtp_bridge_compatible(struct ast_bridge *bridge)
{
struct ast_bridge_channel *c0 = AST_LIST_FIRST(&bridge->channels);
struct ast_bridge_channel *c1 = AST_LIST_LAST(&bridge->channels);
struct ast_bridge_channel *bc0 = AST_LIST_FIRST(&bridge->channels);
struct ast_bridge_channel *bc1 = AST_LIST_LAST(&bridge->channels);
enum ast_rtp_glue_result native_type;
struct ast_rtp_glue *glue0, *glue1;
RAII_VAR(struct ast_rtp_instance *, instance0, NULL, ao2_cleanup);
@ -323,41 +319,41 @@ static int native_rtp_bridge_compatible(struct ast_bridge *bridge)
return 0;
}
if (!native_rtp_bridge_capable(c0->chan)) {
if (!native_rtp_bridge_capable(bc0->chan)) {
ast_debug(1, "Bridge '%s' can not use native RTP bridge as channel '%s' has features which prevent it\n",
bridge->uniqueid, ast_channel_name(c0->chan));
bridge->uniqueid, ast_channel_name(bc0->chan));
return 0;
}
if (!native_rtp_bridge_capable(c1->chan)) {
if (!native_rtp_bridge_capable(bc1->chan)) {
ast_debug(1, "Bridge '%s' can not use native RTP bridge as channel '%s' has features which prevent it\n",
bridge->uniqueid, ast_channel_name(c1->chan));
bridge->uniqueid, ast_channel_name(bc1->chan));
return 0;
}
if ((native_type = native_rtp_bridge_get(c0->chan, c1->chan, &glue0, &glue1, &instance0, &instance1, &vinstance0, &vinstance1))
if ((native_type = native_rtp_bridge_get(bc0->chan, bc1->chan, &glue0, &glue1, &instance0, &instance1, &vinstance0, &vinstance1))
== AST_RTP_GLUE_RESULT_FORBID) {
ast_debug(1, "Bridge '%s' can not use native RTP bridge as it was forbidden while getting details\n",
bridge->uniqueid);
return 0;
}
if (ao2_container_count(c0->features->dtmf_hooks) && ast_rtp_instance_dtmf_mode_get(instance0)) {
if (ao2_container_count(bc0->features->dtmf_hooks) && ast_rtp_instance_dtmf_mode_get(instance0)) {
ast_debug(1, "Bridge '%s' can not use native RTP bridge as channel '%s' has DTMF hooks\n",
bridge->uniqueid, ast_channel_name(c0->chan));
bridge->uniqueid, ast_channel_name(bc0->chan));
return 0;
}
if (ao2_container_count(c1->features->dtmf_hooks) && ast_rtp_instance_dtmf_mode_get(instance1)) {
if (ao2_container_count(bc1->features->dtmf_hooks) && ast_rtp_instance_dtmf_mode_get(instance1)) {
ast_debug(1, "Bridge '%s' can not use native RTP bridge as channel '%s' has DTMF hooks\n",
bridge->uniqueid, ast_channel_name(c1->chan));
bridge->uniqueid, ast_channel_name(bc1->chan));
return 0;
}
if ((native_type == AST_RTP_GLUE_RESULT_LOCAL) && ((ast_rtp_instance_get_engine(instance0)->local_bridge !=
ast_rtp_instance_get_engine(instance1)->local_bridge) ||
(ast_rtp_instance_get_engine(instance0)->dtmf_compatible &&
!ast_rtp_instance_get_engine(instance0)->dtmf_compatible(c0->chan, instance0, c1->chan, instance1)))) {
!ast_rtp_instance_get_engine(instance0)->dtmf_compatible(bc0->chan, instance0, bc1->chan, instance1)))) {
ast_debug(1, "Bridge '%s' can not use local native RTP bridge as local bridge or DTMF is not compatible\n",
bridge->uniqueid);
return 0;
@ -365,10 +361,10 @@ static int native_rtp_bridge_compatible(struct ast_bridge *bridge)
/* Make sure that codecs match */
if (glue0->get_codec) {
glue0->get_codec(c0->chan, cap0);
glue0->get_codec(bc0->chan, cap0);
}
if (glue1->get_codec) {
glue1->get_codec(c1->chan, cap1);
glue1->get_codec(bc1->chan, cap1);
}
if (ast_format_cap_count(cap0) != 0 && ast_format_cap_count(cap1) != 0 && !ast_format_cap_iscompatible(cap0, cap1)) {
struct ast_str *codec_buf0 = ast_str_alloca(64);
@ -378,10 +374,10 @@ static int native_rtp_bridge_compatible(struct ast_bridge *bridge)
return 0;
}
read_ptime0 = ast_format_cap_get_format_framing(cap0, ast_channel_rawreadformat(c0->chan));
read_ptime1 = ast_format_cap_get_format_framing(cap1, ast_channel_rawreadformat(c1->chan));
write_ptime0 = ast_format_cap_get_format_framing(cap0, ast_channel_rawwriteformat(c0->chan));
write_ptime1 = ast_format_cap_get_format_framing(cap1, ast_channel_rawwriteformat(c1->chan));
read_ptime0 = ast_format_cap_get_format_framing(cap0, ast_channel_rawreadformat(bc0->chan));
read_ptime1 = ast_format_cap_get_format_framing(cap1, ast_channel_rawreadformat(bc1->chan));
write_ptime0 = ast_format_cap_get_format_framing(cap0, ast_channel_rawwriteformat(bc0->chan));
write_ptime1 = ast_format_cap_get_format_framing(cap1, ast_channel_rawwriteformat(bc1->chan));
if (read_ptime0 != write_ptime1 || read_ptime1 != write_ptime0) {
ast_debug(1, "Packetization differs between RTP streams (%d != %d or %d != %d). Cannot native bridge in RTP\n",

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