static int frame_trace_helper(struct ast_channel *chan, const char *cmd, char *data, const char *value)
{
struct frame_trace_data *framedata;
struct ast_datastore *datastore = NULL;
struct ast_framehook_interface interface = {
.version = AST_FRAMEHOOK_INTERFACE_VERSION,
.event_cb = hook_event_cb,
.destroy_cb = hook_destroy_cb,
};
int i = 0;
if (!(framedata = ast_calloc(1, sizeof(*framedata)))) {
return 0;
}
interface.data = framedata;
if (!strcasecmp(data, "black")) {
framedata->list_type = 1;
}
for (i = 0; i < ARRAY_LEN(frametype2str); i++) {
if (strcasestr(value, frametype2str[i].str)) {
framedata->values[i] = 1;
}
}
ast_channel_lock(chan);
i = ast_framehook_attach(chan, &interface);
if (i >= 0) {
int *id;
if ((datastore = ast_channel_datastore_find(chan, &frame_trace_datastore, NULL))) {
id = datastore->data;
ast_framehook_detach(chan, *id);
ast_channel_datastore_remove(chan, datastore);
}
if (!(datastore = ast_datastore_alloc(&frame_trace_datastore, NULL))) {
ast_framehook_detach(chan, i);
ast_channel_unlock(chan);
return 0;
}
if (!(id = ast_calloc(1, sizeof(int)))) {
ast_datastore_free(datastore);
ast_framehook_detach(chan, i);
ast_channel_unlock(chan);
return 0;
}
*id = i; /* Store off the id. The channel is still locked so it is safe to access this ptr. */
datastore->data = id;
ast_channel_datastore_add(chan, datastore);
}
ast_channel_unlock(chan);
return 0;
}
static void t38_masq(void *data, int framehook_id,
struct ast_channel *old_chan, struct ast_channel *new_chan)
{
if (ast_channel_tech(old_chan) == ast_channel_tech(new_chan)) {
return;
}
/* This framehook is only applicable to PJSIP channels */
ast_framehook_detach(new_chan, framehook_id);
}
/*! \brief Function called to attach T.38 framehook to channel when appropriate */
static void t38_attach_framehook(struct ast_sip_session *session)
{
int framehook_id;
struct ast_datastore *datastore = NULL;
static struct ast_framehook_interface hook = {
.version = AST_FRAMEHOOK_INTERFACE_VERSION,
.event_cb = t38_framehook,
.consume_cb = t38_consume,
.chan_fixup_cb = t38_masq,
.chan_breakdown_cb = t38_masq,
};
/* If the channel's already gone, bail */
if (!session->channel) {
return;
}
/* Only attach the framehook if t38 is enabled for the endpoint */
if (!session->endpoint->media.t38.enabled) {
return;
}
/* Skip attaching the framehook if the T.38 datastore already exists for the channel */
ast_channel_lock(session->channel);
if ((datastore = ast_channel_datastore_find(session->channel, &t38_framehook_datastore, NULL))) {
ast_channel_unlock(session->channel);
return;
}
ast_channel_unlock(session->channel);
framehook_id = ast_framehook_attach(session->channel, &hook);
if (framehook_id < 0) {
ast_log(LOG_WARNING, "Could not attach T.38 Frame hook to channel, T.38 will be unavailable on '%s'\n",
ast_channel_name(session->channel));
return;
}
ast_channel_lock(session->channel);
datastore = ast_datastore_alloc(&t38_framehook_datastore, NULL);
if (!datastore) {
ast_log(LOG_ERROR, "Could not attach T.38 Frame hook to channel, T.38 will be unavailable on '%s'\n",
ast_channel_name(session->channel));
ast_framehook_detach(session->channel, framehook_id);
ast_channel_unlock(session->channel);
return;
}
ast_channel_datastore_add(session->channel, datastore);
ast_channel_unlock(session->channel);
}
/*! \brief Helper function which adds frame hook to bridge channel */
static int native_rtp_bridge_framehook_attach(struct ast_bridge_channel *bridge_channel)
{
struct native_rtp_bridge_data *data = ao2_alloc(sizeof(*data), NULL);
static struct ast_framehook_interface hook = {
.version = AST_FRAMEHOOK_INTERFACE_VERSION,
.event_cb = native_rtp_framehook,
.destroy_cb = __ao2_cleanup,
.consume_cb = native_rtp_framehook_consume,
.disable_inheritance = 1,
};
if (!data) {
return -1;
}
ast_channel_lock(bridge_channel->chan);
hook.data = ao2_bump(data);
data->id = ast_framehook_attach(bridge_channel->chan, &hook);
ast_channel_unlock(bridge_channel->chan);
if (data->id < 0) {
/* We need to drop both the reference we hold, and the one the framehook would hold */
ao2_ref(data, -2);
return -1;
}
bridge_channel->tech_pvt = data;
return 0;
}
/*! \brief Helper function which removes frame hook from bridge channel */
static void native_rtp_bridge_framehook_detach(struct ast_bridge_channel *bridge_channel)
{
RAII_VAR(struct native_rtp_bridge_data *, data, bridge_channel->tech_pvt, ao2_cleanup);
if (!data) {
return;
}
ast_channel_lock(bridge_channel->chan);
ast_framehook_detach(bridge_channel->chan, data->id);
data->detached = 1;
ast_channel_unlock(bridge_channel->chan);
bridge_channel->tech_pvt = NULL;
}
void ast_jb_create_framehook(struct ast_channel *chan, struct ast_jb_conf *jb_conf, int prefer_existing)
{
struct jb_framedata *framedata;
struct ast_datastore *datastore = NULL;
struct ast_framehook_interface interface = {
.version = AST_FRAMEHOOK_INTERFACE_VERSION,
.event_cb = hook_event_cb,
.destroy_cb = hook_destroy_cb,
};
int i = 0;
/* If disabled, strip any existing jitterbuffer and don't replace it. */
if (!strcasecmp(jb_conf->impl, "disabled")) {
int *id;
ast_channel_lock(chan);
if ((datastore = ast_channel_datastore_find(chan, &jb_datastore, NULL))) {
id = datastore->data;
ast_framehook_detach(chan, *id);
ast_channel_datastore_remove(chan, datastore);
ast_datastore_free(datastore);
}
ast_channel_unlock(chan);
return;
}
if (!(framedata = ast_calloc(1, sizeof(*framedata)))) {
return;
}
if (jb_framedata_init(framedata, jb_conf)) {
jb_framedata_destroy(framedata);
return;
}
interface.data = framedata;
ast_channel_lock(chan);
i = ast_framehook_attach(chan, &interface);
if (i >= 0) {
int *id;
if ((datastore = ast_channel_datastore_find(chan, &jb_datastore, NULL))) {
/* There is already a jitterbuffer on the channel. */
if (prefer_existing) {
/* We prefer the existing jitterbuffer, so remove the new one and keep the old one. */
ast_framehook_detach(chan, i);
ast_channel_unlock(chan);
return;
}
/* We prefer the new jitterbuffer, so strip the old one. */
id = datastore->data;
ast_framehook_detach(chan, *id);
ast_channel_datastore_remove(chan, datastore);
ast_datastore_free(datastore);
}
if (!(datastore = ast_datastore_alloc(&jb_datastore, NULL))) {
ast_framehook_detach(chan, i);
ast_channel_unlock(chan);
return;
}
if (!(id = ast_calloc(1, sizeof(int)))) {
ast_datastore_free(datastore);
ast_framehook_detach(chan, i);
ast_channel_unlock(chan);
return;
}
*id = i; /* Store off the id. The channel is still locked so it is safe to access this ptr. */
datastore->data = id;
ast_channel_datastore_add(chan, datastore);
ast_channel_set_fd(chan, AST_JITTERBUFFER_FD, framedata->timer_fd);
} else {
jb_framedata_destroy(framedata);
framedata = NULL;
}
ast_channel_unlock(chan);
}