/* Thread to handle incoming messages */
static void *janus_videocall_handler(void *data) {
JANUS_LOG(LOG_VERB, "Joining thread\n");
janus_videocall_message *msg = NULL;
int error_code = 0;
char *error_cause = calloc(512, sizeof(char)); /* FIXME 512 should be enough, but anyway... */
if(error_cause == NULL) {
JANUS_LOG(LOG_FATAL, "Memory error!\n");
return NULL;
}
json_t *root = NULL;
while(initialized && !stopping) {
if(!messages || (msg = g_async_queue_try_pop(messages)) == NULL) {
usleep(50000);
continue;
}
janus_videocall_session *session = (janus_videocall_session *)msg->handle->plugin_handle;
if(!session) {
JANUS_LOG(LOG_ERR, "No session associated with this handle...\n");
janus_videocall_message_free(msg);
continue;
}
if(session->destroy) {
janus_videocall_message_free(msg);
continue;
}
/* Handle request */
error_code = 0;
root = NULL;
JANUS_LOG(LOG_VERB, "Handling message: %s\n", msg->message);
if(msg->message == NULL) {
JANUS_LOG(LOG_ERR, "No message??\n");
error_code = JANUS_VIDEOCALL_ERROR_NO_MESSAGE;
sprintf(error_cause, "%s", "No message??");
goto error;
}
json_error_t error;
root = json_loads(msg->message, 0, &error);
if(!root) {
JANUS_LOG(LOG_ERR, "JSON error: on line %d: %s\n", error.line, error.text);
error_code = JANUS_VIDEOCALL_ERROR_INVALID_JSON;
sprintf(error_cause, "JSON error: on line %d: %s", error.line, error.text);
goto error;
}
if(!json_is_object(root)) {
JANUS_LOG(LOG_ERR, "JSON error: not an object\n");
error_code = JANUS_VIDEOCALL_ERROR_INVALID_JSON;
sprintf(error_cause, "JSON error: not an object");
goto error;
}
json_t *request = json_object_get(root, "request");
if(!request) {
JANUS_LOG(LOG_ERR, "Missing element (request)\n");
error_code = JANUS_VIDEOCALL_ERROR_MISSING_ELEMENT;
sprintf(error_cause, "Missing element (request)");
goto error;
}
if(!json_is_string(request)) {
JANUS_LOG(LOG_ERR, "Invalid element (request should be a string)\n");
error_code = JANUS_VIDEOCALL_ERROR_INVALID_ELEMENT;
sprintf(error_cause, "Invalid element (request should be a string)");
goto error;
}
const char *request_text = json_string_value(request);
json_t *result = NULL;
char *sdp_type = NULL, *sdp = NULL;
if(!strcasecmp(request_text, "list")) {
result = json_object();
json_t *list = json_array();
JANUS_LOG(LOG_VERB, "Request for the list of peers\n");
/* Return a list of all available mountpoints */
janus_mutex_lock(&sessions_mutex);
GHashTableIter iter;
gpointer value;
g_hash_table_iter_init(&iter, sessions);
while (g_hash_table_iter_next(&iter, NULL, &value)) {
janus_videocall_session *user = value;
if(user != NULL && user->username != NULL)
json_array_append_new(list, json_string(user->username));
}
json_object_set_new(result, "list", list);
janus_mutex_unlock(&sessions_mutex);
} else if(!strcasecmp(request_text, "register")) {
/* Map this handle to a username */
if(session->username != NULL) {
JANUS_LOG(LOG_ERR, "Already registered (%s)\n", session->username);
error_code = JANUS_VIDEOCALL_ERROR_ALREADY_REGISTERED;
sprintf(error_cause, "Already registered (%s)", session->username);
goto error;
}
json_t *username = json_object_get(root, "username");
if(!username) {
JANUS_LOG(LOG_ERR, "Missing element (username)\n");
error_code = JANUS_VIDEOCALL_ERROR_MISSING_ELEMENT;
sprintf(error_cause, "Missing element (username)");
goto error;
}
if(!json_is_string(username)) {
JANUS_LOG(LOG_ERR, "Invalid element (username should be a string)\n");
error_code = JANUS_VIDEOCALL_ERROR_INVALID_ELEMENT;
sprintf(error_cause, "Invalid element (username should be a string)");
goto error;
}
const char *username_text = json_string_value(username);
janus_mutex_lock(&sessions_mutex);
if(g_hash_table_lookup(sessions, username_text) != NULL) {
janus_mutex_unlock(&sessions_mutex);
JANUS_LOG(LOG_ERR, "Username '%s' already taken\n", username_text);
error_code = JANUS_VIDEOCALL_ERROR_USERNAME_TAKEN;
sprintf(error_cause, "Username '%s' already taken", username_text);
goto error;
}
janus_mutex_unlock(&sessions_mutex);
session->username = g_strdup(username_text);
if(session->username == NULL) {
JANUS_LOG(LOG_FATAL, "Memory error!\n");
error_code = JANUS_VIDEOCALL_ERROR_UNKNOWN_ERROR;
sprintf(error_cause, "Memory error");
goto error;
}
janus_mutex_lock(&sessions_mutex);
g_hash_table_insert(sessions, (gpointer)session->username, session);
janus_mutex_unlock(&sessions_mutex);
result = json_object();
json_object_set_new(result, "event", json_string("registered"));
json_object_set_new(result, "username", json_string(username_text));
} else if(!strcasecmp(request_text, "call")) {
/* Call another peer */
if(session->username == NULL) {
JANUS_LOG(LOG_ERR, "Register a username first\n");
error_code = JANUS_VIDEOCALL_ERROR_REGISTER_FIRST;
sprintf(error_cause, "Register a username first");
goto error;
}
if(session->peer != NULL) {
JANUS_LOG(LOG_ERR, "Already in a call\n");
error_code = JANUS_VIDEOCALL_ERROR_ALREADY_IN_CALL;
sprintf(error_cause, "Already in a call");
goto error;
}
json_t *username = json_object_get(root, "username");
if(!username) {
JANUS_LOG(LOG_ERR, "Missing element (username)\n");
error_code = JANUS_VIDEOCALL_ERROR_MISSING_ELEMENT;
sprintf(error_cause, "Missing element (username)");
goto error;
}
if(!json_is_string(username)) {
JANUS_LOG(LOG_ERR, "Invalid element (username should be a string)\n");
error_code = JANUS_VIDEOCALL_ERROR_INVALID_ELEMENT;
sprintf(error_cause, "Invalid element (username should be a string)");
goto error;
}
const char *username_text = json_string_value(username);
if(!strcmp(username_text, session->username)) {
JANUS_LOG(LOG_ERR, "You can't call yourself... use the EchoTest for that\n");
error_code = JANUS_VIDEOCALL_ERROR_USE_ECHO_TEST;
sprintf(error_cause, "You can't call yourself... use the EchoTest for that");
goto error;
}
janus_mutex_lock(&sessions_mutex);
janus_videocall_session *peer = g_hash_table_lookup(sessions, username_text);
if(peer == NULL || peer->destroy) {
janus_mutex_unlock(&sessions_mutex);
JANUS_LOG(LOG_ERR, "Username '%s' doesn't exist\n", username_text);
error_code = JANUS_VIDEOCALL_ERROR_NO_SUCH_USERNAME;
sprintf(error_cause, "Username '%s' doesn't exist", username_text);
goto error;
}
if(peer->peer != NULL) {
janus_mutex_unlock(&sessions_mutex);
JANUS_LOG(LOG_VERB, "%s is busy\n", username_text);
result = json_object();
json_object_set_new(result, "event", json_string("hangup"));
json_object_set_new(result, "username", json_string(session->username));
json_object_set_new(result, "reason", json_string("User busy"));
} else {
janus_mutex_unlock(&sessions_mutex);
/* Any SDP to handle? if not, something's wrong */
if(!msg->sdp) {
JANUS_LOG(LOG_ERR, "Missing SDP\n");
error_code = JANUS_VIDEOCALL_ERROR_MISSING_SDP;
sprintf(error_cause, "Missing SDP");
goto error;
}
janus_mutex_lock(&sessions_mutex);
session->peer = peer;
peer->peer = session;
janus_mutex_unlock(&sessions_mutex);
JANUS_LOG(LOG_VERB, "%s is calling %s\n", session->username, session->peer->username);
JANUS_LOG(LOG_VERB, "This is involving a negotiation (%s) as well:\n%s\n", msg->sdp_type, msg->sdp);
/* Send SDP to our peer */
json_t *call = json_object();
json_object_set_new(call, "videocall", json_string("event"));
json_t *calling = json_object();
json_object_set_new(calling, "event", json_string("incomingcall"));
json_object_set_new(calling, "username", json_string(session->username));
json_object_set_new(call, "result", calling);
char *call_text = json_dumps(call, JSON_INDENT(3) | JSON_PRESERVE_ORDER);
json_decref(call);
JANUS_LOG(LOG_VERB, "Pushing event to peer: %s\n", call_text);
int ret = gateway->push_event(peer->handle, &janus_videocall_plugin, NULL, call_text, msg->sdp_type, msg->sdp);
JANUS_LOG(LOG_VERB, " >> %d (%s)\n", ret, janus_get_api_error(ret));
g_free(call_text);
/* Send an ack back */
result = json_object();
json_object_set_new(result, "event", json_string("calling"));
}
} else if(!strcasecmp(request_text, "accept")) {
/* Accept a call from another peer */
if(session->peer == NULL) {
JANUS_LOG(LOG_ERR, "No incoming call to accept\n");
error_code = JANUS_VIDEOCALL_ERROR_NO_CALL;
sprintf(error_cause, "No incoming call to accept");
goto error;
}
/* Any SDP to handle? if not, something's wrong */
if(!msg->sdp) {
JANUS_LOG(LOG_ERR, "Missing SDP\n");
error_code = JANUS_VIDEOCALL_ERROR_MISSING_SDP;
sprintf(error_cause, "Missing SDP");
goto error;
}
JANUS_LOG(LOG_VERB, "%s is accepting a call from %s\n", session->username, session->peer->username);
JANUS_LOG(LOG_VERB, "This is involving a negotiation (%s) as well:\n%s\n", msg->sdp_type, msg->sdp);
/* Send SDP to our peer */
json_t *call = json_object();
json_object_set_new(call, "videocall", json_string("event"));
json_t *calling = json_object();
json_object_set_new(calling, "event", json_string("accepted"));
json_object_set_new(calling, "username", json_string(session->username));
json_object_set_new(call, "result", calling);
char *call_text = json_dumps(call, JSON_INDENT(3) | JSON_PRESERVE_ORDER);
json_decref(call);
JANUS_LOG(LOG_VERB, "Pushing event to peer: %s\n", call_text);
int ret = gateway->push_event(session->peer->handle, &janus_videocall_plugin, NULL, call_text, msg->sdp_type, msg->sdp);
JANUS_LOG(LOG_VERB, " >> %d (%s)\n", ret, janus_get_api_error(ret));
g_free(call_text);
/* Send an ack back */
result = json_object();
json_object_set_new(result, "event", json_string("accepted"));
} else if(!strcasecmp(request_text, "set")) {
/* Update the local configuration (audio/video mute/unmute, or bitrate cap) */
json_t *audio = json_object_get(root, "audio");
if(audio && !json_is_boolean(audio)) {
JANUS_LOG(LOG_ERR, "Invalid element (audio should be a boolean)\n");
error_code = JANUS_VIDEOCALL_ERROR_INVALID_ELEMENT;
sprintf(error_cause, "Invalid value (audio should be a boolean)");
goto error;
}
json_t *video = json_object_get(root, "video");
if(video && !json_is_boolean(video)) {
JANUS_LOG(LOG_ERR, "Invalid element (video should be a boolean)\n");
error_code = JANUS_VIDEOCALL_ERROR_INVALID_ELEMENT;
sprintf(error_cause, "Invalid value (video should be a boolean)");
goto error;
}
json_t *bitrate = json_object_get(root, "bitrate");
if(bitrate && !json_is_integer(bitrate)) {
JANUS_LOG(LOG_ERR, "Invalid element (bitrate should be an integer)\n");
error_code = JANUS_VIDEOCALL_ERROR_INVALID_ELEMENT;
sprintf(error_cause, "Invalid value (bitrate should be an integer)");
goto error;
}
if(audio) {
session->audio_active = json_is_true(audio);
JANUS_LOG(LOG_VERB, "Setting audio property: %s\n", session->audio_active ? "true" : "false");
}
if(video) {
session->video_active = json_is_true(video);
JANUS_LOG(LOG_VERB, "Setting video property: %s\n", session->video_active ? "true" : "false");
}
if(bitrate) {
session->bitrate = json_integer_value(bitrate);
JANUS_LOG(LOG_VERB, "Setting video bitrate: %"SCNu64"\n", session->bitrate);
if(session->bitrate > 0) {
/* FIXME Generate a new REMB (especially useful for Firefox, which doesn't send any we can cap later) */
char buf[24];
memset(buf, 0, 24);
janus_rtcp_remb((char *)&buf, 24, session->bitrate);
JANUS_LOG(LOG_VERB, "Sending REMB\n");
gateway->relay_rtcp(session->handle, 1, buf, 24);
/* FIXME How should we handle a subsequent "no limit" bitrate? */
}
}
/* Send an ack back */
result = json_object();
json_object_set_new(result, "event", json_string("set"));
} else if(!strcasecmp(request_text, "hangup")) {
/* Hangup an ongoing call or reject an incoming one */
janus_mutex_lock(&sessions_mutex);
janus_videocall_session *peer = session->peer;
if(peer == NULL) {
JANUS_LOG(LOG_WARN, "No call to hangup\n");
} else {
JANUS_LOG(LOG_VERB, "%s is hanging up the call with %s\n", session->username, peer->username);
session->peer = NULL;
peer->peer = NULL;
}
janus_mutex_unlock(&sessions_mutex);
/* Notify the success as an hangup message */
result = json_object();
json_object_set_new(result, "event", json_string("hangup"));
json_object_set_new(result, "username", json_string(session->username));
json_object_set_new(result, "reason", json_string("We did the hangup"));
if(peer != NULL) {
/* Send event to our peer too */
json_t *call = json_object();
json_object_set_new(call, "videocall", json_string("event"));
json_t *calling = json_object();
json_object_set_new(calling, "event", json_string("hangup"));
json_object_set_new(calling, "username", json_string(session->username));
json_object_set_new(calling, "reason", json_string("Remote hangup"));
json_object_set_new(call, "result", calling);
char *call_text = json_dumps(call, JSON_INDENT(3) | JSON_PRESERVE_ORDER);
json_decref(call);
JANUS_LOG(LOG_VERB, "Pushing event to peer: %s\n", call_text);
int ret = gateway->push_event(peer->handle, &janus_videocall_plugin, NULL, call_text, NULL, NULL);
JANUS_LOG(LOG_VERB, " >> %d (%s)\n", ret, janus_get_api_error(ret));
g_free(call_text);
}
} else {
JANUS_LOG(LOG_ERR, "Unknown request (%s)\n", request_text);
error_code = JANUS_VIDEOCALL_ERROR_INVALID_REQUEST;
sprintf(error_cause, "Unknown request (%s)", request_text);
goto error;
}
json_decref(root);
/* Prepare JSON event */
json_t *event = json_object();
json_object_set_new(event, "videocall", json_string("event"));
if(result != NULL)
json_object_set(event, "result", result);
char *event_text = json_dumps(event, JSON_INDENT(3) | JSON_PRESERVE_ORDER);
json_decref(event);
if(result != NULL)
json_decref(result);
JANUS_LOG(LOG_VERB, "Pushing event: %s\n", event_text);
int ret = gateway->push_event(msg->handle, &janus_videocall_plugin, msg->transaction, event_text, sdp_type, sdp);
JANUS_LOG(LOG_VERB, " >> %d (%s)\n", ret, janus_get_api_error(ret));
g_free(event_text);
if(sdp)
g_free(sdp);
janus_videocall_message_free(msg);
continue;
error:
{
if(root != NULL)
json_decref(root);
/* Prepare JSON error event */
json_t *event = json_object();
json_object_set_new(event, "videocall", json_string("event"));
json_object_set_new(event, "error_code", json_integer(error_code));
json_object_set_new(event, "error", json_string(error_cause));
char *event_text = json_dumps(event, JSON_INDENT(3) | JSON_PRESERVE_ORDER);
json_decref(event);
JANUS_LOG(LOG_VERB, "Pushing event: %s\n", event_text);
int ret = gateway->push_event(msg->handle, &janus_videocall_plugin, msg->transaction, event_text, NULL, NULL);
JANUS_LOG(LOG_VERB, " >> %d (%s)\n", ret, janus_get_api_error(ret));
g_free(event_text);
janus_videocall_message_free(msg);
}
}
g_free(error_cause);
JANUS_LOG(LOG_VERB, "Leaving thread\n");
return NULL;
}
/* Thread to handle incoming messages */
static void *janus_videocall_handler(void *data) {
JANUS_LOG(LOG_VERB, "Joining VideoCall handler thread\n");
janus_videocall_message *msg = NULL;
int error_code = 0;
char error_cause[512];
json_t *root = NULL;
while(g_atomic_int_get(&initialized) && !g_atomic_int_get(&stopping)) {
msg = g_async_queue_pop(messages);
if(msg == NULL)
continue;
if(msg == &exit_message)
break;
if(msg->handle == NULL) {
janus_videocall_message_free(msg);
continue;
}
janus_videocall_session *session = (janus_videocall_session *)msg->handle->plugin_handle;
if(!session) {
JANUS_LOG(LOG_ERR, "No session associated with this handle...\n");
janus_videocall_message_free(msg);
continue;
}
if(session->destroyed) {
janus_videocall_message_free(msg);
continue;
}
/* Handle request */
error_code = 0;
root = NULL;
JANUS_LOG(LOG_VERB, "Handling message: %s\n", msg->message);
if(msg->message == NULL) {
JANUS_LOG(LOG_ERR, "No message??\n");
error_code = JANUS_VIDEOCALL_ERROR_NO_MESSAGE;
g_snprintf(error_cause, 512, "%s", "No message??");
goto error;
}
json_error_t error;
root = json_loads(msg->message, 0, &error);
if(!root) {
JANUS_LOG(LOG_ERR, "JSON error: on line %d: %s\n", error.line, error.text);
error_code = JANUS_VIDEOCALL_ERROR_INVALID_JSON;
g_snprintf(error_cause, 512, "JSON error: on line %d: %s", error.line, error.text);
goto error;
}
if(!json_is_object(root)) {
JANUS_LOG(LOG_ERR, "JSON error: not an object\n");
error_code = JANUS_VIDEOCALL_ERROR_INVALID_JSON;
g_snprintf(error_cause, 512, "JSON error: not an object");
goto error;
}
JANUS_VALIDATE_JSON_OBJECT(root, request_parameters,
error_code, error_cause, TRUE,
JANUS_VIDEOCALL_ERROR_MISSING_ELEMENT, JANUS_VIDEOCALL_ERROR_INVALID_ELEMENT);
if(error_code != 0)
goto error;
json_t *request = json_object_get(root, "request");
const char *request_text = json_string_value(request);
json_t *result = NULL;
char *sdp_type = NULL, *sdp = NULL;
if(!strcasecmp(request_text, "list")) {
result = json_object();
json_t *list = json_array();
JANUS_LOG(LOG_VERB, "Request for the list of peers\n");
/* Return a list of all available mountpoints */
janus_mutex_lock(&sessions_mutex);
GHashTableIter iter;
gpointer value;
g_hash_table_iter_init(&iter, sessions);
while (g_hash_table_iter_next(&iter, NULL, &value)) {
janus_videocall_session *user = value;
if(user != NULL && user->username != NULL)
json_array_append_new(list, json_string(user->username));
}
json_object_set_new(result, "list", list);
janus_mutex_unlock(&sessions_mutex);
} else if(!strcasecmp(request_text, "register")) {
/* Map this handle to a username */
if(session->username != NULL) {
JANUS_LOG(LOG_ERR, "Already registered (%s)\n", session->username);
error_code = JANUS_VIDEOCALL_ERROR_ALREADY_REGISTERED;
g_snprintf(error_cause, 512, "Already registered (%s)", session->username);
goto error;
}
JANUS_VALIDATE_JSON_OBJECT(root, username_parameters,
error_code, error_cause, TRUE,
JANUS_VIDEOCALL_ERROR_MISSING_ELEMENT, JANUS_VIDEOCALL_ERROR_INVALID_ELEMENT);
if(error_code != 0)
goto error;
json_t *username = json_object_get(root, "username");
const char *username_text = json_string_value(username);
janus_mutex_lock(&sessions_mutex);
if(g_hash_table_lookup(sessions, username_text) != NULL) {
janus_mutex_unlock(&sessions_mutex);
JANUS_LOG(LOG_ERR, "Username '%s' already taken\n", username_text);
error_code = JANUS_VIDEOCALL_ERROR_USERNAME_TAKEN;
g_snprintf(error_cause, 512, "Username '%s' already taken", username_text);
goto error;
}
janus_mutex_unlock(&sessions_mutex);
session->username = g_strdup(username_text);
if(session->username == NULL) {
JANUS_LOG(LOG_FATAL, "Memory error!\n");
error_code = JANUS_VIDEOCALL_ERROR_UNKNOWN_ERROR;
g_snprintf(error_cause, 512, "Memory error");
goto error;
}
janus_mutex_lock(&sessions_mutex);
g_hash_table_insert(sessions, (gpointer)session->username, session);
janus_mutex_unlock(&sessions_mutex);
result = json_object();
json_object_set_new(result, "event", json_string("registered"));
json_object_set_new(result, "username", json_string(username_text));
} else if(!strcasecmp(request_text, "call")) {
/* Call another peer */
if(session->username == NULL) {
JANUS_LOG(LOG_ERR, "Register a username first\n");
error_code = JANUS_VIDEOCALL_ERROR_REGISTER_FIRST;
g_snprintf(error_cause, 512, "Register a username first");
goto error;
}
if(session->peer != NULL) {
JANUS_LOG(LOG_ERR, "Already in a call\n");
error_code = JANUS_VIDEOCALL_ERROR_ALREADY_IN_CALL;
g_snprintf(error_cause, 512, "Already in a call");
goto error;
}
JANUS_VALIDATE_JSON_OBJECT(root, username_parameters,
error_code, error_cause, TRUE,
JANUS_VIDEOCALL_ERROR_MISSING_ELEMENT, JANUS_VIDEOCALL_ERROR_INVALID_ELEMENT);
if(error_code != 0)
goto error;
json_t *username = json_object_get(root, "username");
const char *username_text = json_string_value(username);
if(!strcmp(username_text, session->username)) {
JANUS_LOG(LOG_ERR, "You can't call yourself... use the EchoTest for that\n");
error_code = JANUS_VIDEOCALL_ERROR_USE_ECHO_TEST;
g_snprintf(error_cause, 512, "You can't call yourself... use the EchoTest for that");
goto error;
}
janus_mutex_lock(&sessions_mutex);
janus_videocall_session *peer = g_hash_table_lookup(sessions, username_text);
if(peer == NULL || peer->destroyed) {
janus_mutex_unlock(&sessions_mutex);
JANUS_LOG(LOG_ERR, "Username '%s' doesn't exist\n", username_text);
error_code = JANUS_VIDEOCALL_ERROR_NO_SUCH_USERNAME;
g_snprintf(error_cause, 512, "Username '%s' doesn't exist", username_text);
goto error;
}
if(peer->peer != NULL) {
janus_mutex_unlock(&sessions_mutex);
JANUS_LOG(LOG_VERB, "%s is busy\n", username_text);
result = json_object();
json_object_set_new(result, "event", json_string("hangup"));
json_object_set_new(result, "username", json_string(session->username));
json_object_set_new(result, "reason", json_string("User busy"));
} else {
janus_mutex_unlock(&sessions_mutex);
/* Any SDP to handle? if not, something's wrong */
if(!msg->sdp) {
JANUS_LOG(LOG_ERR, "Missing SDP\n");
error_code = JANUS_VIDEOCALL_ERROR_MISSING_SDP;
g_snprintf(error_cause, 512, "Missing SDP");
goto error;
}
janus_mutex_lock(&sessions_mutex);
session->peer = peer;
peer->peer = session;
session->has_audio = (strstr(msg->sdp, "m=audio") != NULL);
session->has_video = (strstr(msg->sdp, "m=video") != NULL);
janus_mutex_unlock(&sessions_mutex);
JANUS_LOG(LOG_VERB, "%s is calling %s\n", session->username, session->peer->username);
JANUS_LOG(LOG_VERB, "This is involving a negotiation (%s) as well:\n%s\n", msg->sdp_type, msg->sdp);
/* Send SDP to our peer */
json_t *call = json_object();
json_object_set_new(call, "videocall", json_string("event"));
json_t *calling = json_object();
json_object_set_new(calling, "event", json_string("incomingcall"));
json_object_set_new(calling, "username", json_string(session->username));
json_object_set_new(call, "result", calling);
char *call_text = json_dumps(call, JSON_INDENT(3) | JSON_PRESERVE_ORDER);
json_decref(call);
/* Make also sure we get rid of ULPfec, red, etc. */
char *sdp = g_strdup(msg->sdp);
if(strstr(sdp, "ulpfec")) {
/* FIXME This really needs some better code */
sdp = janus_string_replace(sdp, "a=rtpmap:116 red/90000\r\n", "");
sdp = janus_string_replace(sdp, "a=rtpmap:117 ulpfec/90000\r\n", "");
sdp = janus_string_replace(sdp, "a=rtpmap:96 rtx/90000\r\n", "");
sdp = janus_string_replace(sdp, "a=fmtp:96 apt=100\r\n", "");
sdp = janus_string_replace(sdp, "a=rtpmap:97 rtx/90000\r\n", "");
sdp = janus_string_replace(sdp, "a=fmtp:97 apt=101\r\n", "");
sdp = janus_string_replace(sdp, "a=rtpmap:98 rtx/90000\r\n", "");
sdp = janus_string_replace(sdp, "a=fmtp:98 apt=116\r\n", "");
sdp = janus_string_replace(sdp, " 116", "");
sdp = janus_string_replace(sdp, " 117", "");
sdp = janus_string_replace(sdp, " 96", "");
sdp = janus_string_replace(sdp, " 97", "");
sdp = janus_string_replace(sdp, " 98", "");
}
g_atomic_int_set(&session->hangingup, 0);
JANUS_LOG(LOG_VERB, "Pushing event to peer: %s\n", call_text);
int ret = gateway->push_event(peer->handle, &janus_videocall_plugin, NULL, call_text, msg->sdp_type, sdp);
g_free(sdp);
JANUS_LOG(LOG_VERB, " >> %d (%s)\n", ret, janus_get_api_error(ret));
g_free(call_text);
/* Send an ack back */
result = json_object();
json_object_set_new(result, "event", json_string("calling"));
}
} else if(!strcasecmp(request_text, "accept")) {
/* Accept a call from another peer */
if(session->peer == NULL) {
JANUS_LOG(LOG_ERR, "No incoming call to accept\n");
error_code = JANUS_VIDEOCALL_ERROR_NO_CALL;
g_snprintf(error_cause, 512, "No incoming call to accept");
goto error;
}
/* Any SDP to handle? if not, something's wrong */
if(!msg->sdp) {
JANUS_LOG(LOG_ERR, "Missing SDP\n");
error_code = JANUS_VIDEOCALL_ERROR_MISSING_SDP;
g_snprintf(error_cause, 512, "Missing SDP");
goto error;
}
JANUS_LOG(LOG_VERB, "%s is accepting a call from %s\n", session->username, session->peer->username);
JANUS_LOG(LOG_VERB, "This is involving a negotiation (%s) as well:\n%s\n", msg->sdp_type, msg->sdp);
session->has_audio = (strstr(msg->sdp, "m=audio") != NULL);
session->has_video = (strstr(msg->sdp, "m=video") != NULL);
/* Send SDP to our peer */
json_t *call = json_object();
json_object_set_new(call, "videocall", json_string("event"));
json_t *calling = json_object();
json_object_set_new(calling, "event", json_string("accepted"));
json_object_set_new(calling, "username", json_string(session->username));
json_object_set_new(call, "result", calling);
char *call_text = json_dumps(call, JSON_INDENT(3) | JSON_PRESERVE_ORDER);
json_decref(call);
g_atomic_int_set(&session->hangingup, 0);
JANUS_LOG(LOG_VERB, "Pushing event to peer: %s\n", call_text);
int ret = gateway->push_event(session->peer->handle, &janus_videocall_plugin, NULL, call_text, msg->sdp_type, msg->sdp);
JANUS_LOG(LOG_VERB, " >> %d (%s)\n", ret, janus_get_api_error(ret));
g_free(call_text);
/* Send an ack back */
result = json_object();
json_object_set_new(result, "event", json_string("accepted"));
} else if(!strcasecmp(request_text, "set")) {
/* Update the local configuration (audio/video mute/unmute, bitrate cap or recording) */
JANUS_VALIDATE_JSON_OBJECT(root, set_parameters,
error_code, error_cause, TRUE,
JANUS_VIDEOCALL_ERROR_MISSING_ELEMENT, JANUS_VIDEOCALL_ERROR_INVALID_ELEMENT);
if(error_code != 0)
goto error;
json_t *audio = json_object_get(root, "audio");
json_t *video = json_object_get(root, "video");
json_t *bitrate = json_object_get(root, "bitrate");
json_t *record = json_object_get(root, "record");
json_t *recfile = json_object_get(root, "filename");
if(audio) {
session->audio_active = json_is_true(audio);
JANUS_LOG(LOG_VERB, "Setting audio property: %s\n", session->audio_active ? "true" : "false");
}
if(video) {
if(!session->video_active && json_is_true(video)) {
/* Send a PLI */
JANUS_LOG(LOG_VERB, "Just (re-)enabled video, sending a PLI to recover it\n");
char buf[12];
memset(buf, 0, 12);
janus_rtcp_pli((char *)&buf, 12);
gateway->relay_rtcp(session->handle, 1, buf, 12);
}
session->video_active = json_is_true(video);
JANUS_LOG(LOG_VERB, "Setting video property: %s\n", session->video_active ? "true" : "false");
}
if(bitrate) {
session->bitrate = json_integer_value(bitrate);
JANUS_LOG(LOG_VERB, "Setting video bitrate: %"SCNu64"\n", session->bitrate);
if(session->bitrate > 0) {
/* FIXME Generate a new REMB (especially useful for Firefox, which doesn't send any we can cap later) */
char buf[24];
memset(buf, 0, 24);
janus_rtcp_remb((char *)&buf, 24, session->bitrate);
JANUS_LOG(LOG_VERB, "Sending REMB\n");
gateway->relay_rtcp(session->handle, 1, buf, 24);
/* FIXME How should we handle a subsequent "no limit" bitrate? */
}
}
if(record) {
if(msg->sdp) {
session->has_audio = (strstr(msg->sdp, "m=audio") != NULL);
session->has_video = (strstr(msg->sdp, "m=video") != NULL);
}
gboolean recording = json_is_true(record);
const char *recording_base = json_string_value(recfile);
JANUS_LOG(LOG_VERB, "Recording %s (base filename: %s)\n", recording ? "enabled" : "disabled", recording_base ? recording_base : "not provided");
janus_mutex_lock(&session->rec_mutex);
if(!recording) {
/* Not recording (anymore?) */
if(session->arc) {
janus_recorder_close(session->arc);
JANUS_LOG(LOG_INFO, "Closed audio recording %s\n", session->arc->filename ? session->arc->filename : "??");
janus_recorder_free(session->arc);
}
session->arc = NULL;
if(session->vrc) {
janus_recorder_close(session->vrc);
JANUS_LOG(LOG_INFO, "Closed video recording %s\n", session->vrc->filename ? session->vrc->filename : "??");
janus_recorder_free(session->vrc);
}
session->vrc = NULL;
} else {
/* We've started recording, send a PLI and go on */
char filename[255];
gint64 now = janus_get_real_time();
if(session->has_audio) {
/* FIXME We assume we're recording Opus, here */
memset(filename, 0, 255);
if(recording_base) {
/* Use the filename and path we have been provided */
g_snprintf(filename, 255, "%s-audio", recording_base);
session->arc = janus_recorder_create(NULL, "opus", filename);
if(session->arc == NULL) {
/* FIXME We should notify the fact the recorder could not be created */
JANUS_LOG(LOG_ERR, "Couldn't open an audio recording file for this VideoCall user!\n");
}
} else {
/* Build a filename */
g_snprintf(filename, 255, "videocall-%s-%s-%"SCNi64"-audio",
session->username ? session->username : "******",
(session->peer && session->peer->username) ? session->peer->username : "******",
now);
session->arc = janus_recorder_create(NULL, "opus", filename);
if(session->arc == NULL) {
/* FIXME We should notify the fact the recorder could not be created */
JANUS_LOG(LOG_ERR, "Couldn't open an audio recording file for this VideoCall user!\n");
}
}
}
if(session->has_video) {
/* FIXME We assume we're recording VP8, here */
memset(filename, 0, 255);
if(recording_base) {
/* Use the filename and path we have been provided */
g_snprintf(filename, 255, "%s-video", recording_base);
session->vrc = janus_recorder_create(NULL, "vp8", filename);
if(session->vrc == NULL) {
/* FIXME We should notify the fact the recorder could not be created */
JANUS_LOG(LOG_ERR, "Couldn't open an video recording file for this VideoCall user!\n");
}
} else {
/* Build a filename */
g_snprintf(filename, 255, "videocall-%s-%s-%"SCNi64"-video",
session->username ? session->username : "******",
(session->peer && session->peer->username) ? session->peer->username : "******",
now);
session->vrc = janus_recorder_create(NULL, "vp8", filename);
if(session->vrc == NULL) {
/* FIXME We should notify the fact the recorder could not be created */
JANUS_LOG(LOG_ERR, "Couldn't open an video recording file for this VideoCall user!\n");
}
}
/* Send a PLI */
JANUS_LOG(LOG_VERB, "Recording video, sending a PLI to kickstart it\n");
char buf[12];
memset(buf, 0, 12);
janus_rtcp_pli((char *)&buf, 12);
gateway->relay_rtcp(session->handle, 1, buf, 12);
}
}
janus_mutex_unlock(&session->rec_mutex);
}
/* Send an ack back */
result = json_object();
json_object_set_new(result, "event", json_string("set"));
} else if(!strcasecmp(request_text, "hangup")) {
/* Hangup an ongoing call or reject an incoming one */
janus_mutex_lock(&sessions_mutex);
janus_videocall_session *peer = session->peer;
if(peer == NULL) {
JANUS_LOG(LOG_WARN, "No call to hangup\n");
} else {
JANUS_LOG(LOG_VERB, "%s is hanging up the call with %s\n", session->username, peer->username);
session->peer = NULL;
peer->peer = NULL;
}
janus_mutex_unlock(&sessions_mutex);
/* Notify the success as an hangup message */
result = json_object();
json_object_set_new(result, "event", json_string("hangup"));
json_object_set_new(result, "username", json_string(session->username));
json_object_set_new(result, "reason", json_string("We did the hangup"));
if(peer != NULL) {
/* Send event to our peer too */
json_t *call = json_object();
json_object_set_new(call, "videocall", json_string("event"));
json_t *calling = json_object();
json_object_set_new(calling, "event", json_string("hangup"));
json_object_set_new(calling, "username", json_string(session->username));
json_object_set_new(calling, "reason", json_string("Remote hangup"));
json_object_set_new(call, "result", calling);
char *call_text = json_dumps(call, JSON_INDENT(3) | JSON_PRESERVE_ORDER);
json_decref(call);
JANUS_LOG(LOG_VERB, "Pushing event to peer: %s\n", call_text);
int ret = gateway->push_event(peer->handle, &janus_videocall_plugin, NULL, call_text, NULL, NULL);
JANUS_LOG(LOG_VERB, " >> %d (%s)\n", ret, janus_get_api_error(ret));
g_free(call_text);
}
} else {
JANUS_LOG(LOG_ERR, "Unknown request (%s)\n", request_text);
error_code = JANUS_VIDEOCALL_ERROR_INVALID_REQUEST;
g_snprintf(error_cause, 512, "Unknown request (%s)", request_text);
goto error;
}
json_decref(root);
/* Prepare JSON event */
json_t *event = json_object();
json_object_set_new(event, "videocall", json_string("event"));
if(result != NULL)
json_object_set_new(event, "result", result);
char *event_text = json_dumps(event, JSON_INDENT(3) | JSON_PRESERVE_ORDER);
json_decref(event);
JANUS_LOG(LOG_VERB, "Pushing event: %s\n", event_text);
int ret = gateway->push_event(msg->handle, &janus_videocall_plugin, msg->transaction, event_text, sdp_type, sdp);
JANUS_LOG(LOG_VERB, " >> %d (%s)\n", ret, janus_get_api_error(ret));
g_free(event_text);
if(sdp)
g_free(sdp);
janus_videocall_message_free(msg);
continue;
error:
{
if(root != NULL)
json_decref(root);
/* Prepare JSON error event */
json_t *event = json_object();
json_object_set_new(event, "videocall", json_string("event"));
json_object_set_new(event, "error_code", json_integer(error_code));
json_object_set_new(event, "error", json_string(error_cause));
char *event_text = json_dumps(event, JSON_INDENT(3) | JSON_PRESERVE_ORDER);
json_decref(event);
JANUS_LOG(LOG_VERB, "Pushing event: %s\n", event_text);
int ret = gateway->push_event(msg->handle, &janus_videocall_plugin, msg->transaction, event_text, NULL, NULL);
JANUS_LOG(LOG_VERB, " >> %d (%s)\n", ret, janus_get_api_error(ret));
g_free(event_text);
janus_videocall_message_free(msg);
}
}
JANUS_LOG(LOG_VERB, "Leaving VideoCall handler thread\n");
return NULL;
}