/* Thread to handle incoming messages */
static void *janus_serial_handler(void *data) {
JANUS_LOG(LOG_VERB, "Joining Serial handler thread\n");
janus_serial_message *msg = NULL;
int error_code = 0;
char *error_cause = calloc(512, sizeof(char));
if(error_cause == NULL) {
JANUS_LOG(LOG_FATAL, "Memory error!\n");
return NULL;
}
json_t *root = NULL;
while(g_atomic_int_get(&initialized) && !g_atomic_int_get(&stopping)) {
if(!messages || (msg = g_async_queue_try_pop(messages)) == NULL) {
usleep(50000);
continue;
}
janus_serial_session *session = (janus_serial_session *)msg->handle->plugin_handle;
if(!session) {
JANUS_LOG(LOG_ERR, "No session associated with this handle...\n");
janus_serial_message_free(msg);
continue;
}
if(session->destroyed) {
janus_serial_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_SERIAL_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_SERIAL_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_SERIAL_ERROR_INVALID_JSON;
g_snprintf(error_cause, 512, "JSON error: not an object");
goto error;
}
/* Parse request */
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_SERIAL_ERROR_INVALID_ELEMENT;
g_snprintf(error_cause, 512, "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_SERIAL_ERROR_INVALID_ELEMENT;
g_snprintf(error_cause, 512, "Invalid value (video should be a boolean)");
goto error;
}
json_t *bitrate = json_object_get(root, "bitrate");
if(bitrate && (!json_is_integer(bitrate) || json_integer_value(bitrate) < 0)) {
JANUS_LOG(LOG_ERR, "Invalid element (bitrate should be a positive integer)\n");
error_code = JANUS_SERIAL_ERROR_INVALID_ELEMENT;
g_snprintf(error_cause, 512, "Invalid value (bitrate should be a positive integer)");
goto error;
}
json_t *record = json_object_get(root, "record");
if(record && !json_is_boolean(record)) {
JANUS_LOG(LOG_ERR, "Invalid element (record should be a boolean)\n");
error_code = JANUS_SERIAL_ERROR_INVALID_ELEMENT;
g_snprintf(error_cause, 512, "Invalid value (record should be a boolean)");
goto error;
}
json_t *recfile = json_object_get(root, "filename");
if(recfile && !json_is_string(recfile)) {
JANUS_LOG(LOG_ERR, "Invalid element (filename should be a string)\n");
error_code = JANUS_SERIAL_ERROR_INVALID_ELEMENT;
g_snprintf(error_cause, 512, "Invalid value (filename should be a string)");
goto error;
}
/* Enforce request */
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");
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_monotonic_time();
if(session->has_audio) {
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, 0, 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 EchoTest user!\n");
}
} else {
/* Build a filename */
g_snprintf(filename, 255, "serial-%p-%"SCNi64"-audio", session, now);
session->arc = janus_recorder_create(NULL, 0, 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 EchoTest user!\n");
}
}
}
if(session->has_video) {
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, 1, 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 EchoTest user!\n");
}
} else {
/* Build a filename */
g_snprintf(filename, 255, "serial-%p-%"SCNi64"-video", session, now);
session->vrc = janus_recorder_create(NULL, 1, 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 EchoTest 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);
}
}
}
/* Any SDP to handle? */
if(msg->sdp) {
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);
}
/*
if(!audio && !video && !bitrate && !record && !msg->sdp) {
JANUS_LOG(LOG_ERR, "No supported attributes (audio, video, bitrate, record, jsep) found\n");
error_code = JANUS_SERIAL_ERROR_INVALID_ELEMENT;
g_snprintf(error_cause, 512, "Message error: no supported attributes (audio, video, bitrate, record, jsep) found");
goto error;
}
*/
json_decref(root);
/* Prepare JSON event */
json_t *event = json_object();
json_object_set_new(event, "serial", json_string("event"));
json_object_set_new(event, "result", json_string("ok"));
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);
if(!msg->sdp) {
int ret = gateway->push_event(msg->handle, &janus_serial_plugin, msg->transaction, event_text, NULL, NULL);
JANUS_LOG(LOG_VERB, " >> %d (%s)\n", ret, janus_get_api_error(ret));
} else {
/* Forward the same offer to the gateway, to start the echo test */
const char *type = NULL;
if(!strcasecmp(msg->sdp_type, "offer"))
type = "answer";
if(!strcasecmp(msg->sdp_type, "answer"))
type = "offer";
/* Any media direction that needs to be fixed? */
char *sdp = g_strdup(msg->sdp);
if(strstr(sdp, "a=recvonly")) {
/* Turn recvonly to inactive, as we simply bounce media back */
sdp = janus_string_replace(sdp, "a=recvonly", "a=inactive");
} else if(strstr(sdp, "a=sendonly")) {
/* Turn sendonly to recvonly */
sdp = janus_string_replace(sdp, "a=sendonly", "a=recvonly");
/* FIXME We should also actually not echo this media back, though... */
}
/* Make also sure we get rid of ULPfec, red, etc. */
if(strstr(sdp, "ulpfec")) {
sdp = janus_string_replace(sdp, "100 116 117 96", "100");
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", "");
}
/* How long will the gateway take to push the event? */
gint64 start = janus_get_monotonic_time();
int res = gateway->push_event(msg->handle, &janus_serial_plugin, msg->transaction, event_text, type, sdp);
JANUS_LOG(LOG_VERB, " >> Pushing event: %d (took %"SCNu64" us)\n",
res, janus_get_monotonic_time()-start);
g_free(sdp);
}
g_free(event_text);
janus_serial_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, "serial", 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_serial_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_serial_message_free(msg);
}
}
g_free(error_cause);
JANUS_LOG(LOG_VERB, "Leaving Serial handler thread\n");
return NULL;
}
gboolean janus_config_save(janus_config *config, const char *folder, const char *filename) {
if(config == NULL)
return -1;
FILE *file = NULL;
char path[1024];
if(folder != NULL) {
/* Create folder, if needed */
if(janus_mkdir(folder, 0755) < 0) {
JANUS_LOG(LOG_ERR, "Couldn't save configuration file, error creating folder '%s'...\n", folder);
return -2;
}
g_snprintf(path, 1024, "%s/%s.cfg", folder, filename);
} else {
g_snprintf(path, 1024, "%s.cfg", filename);
}
file = fopen(path, "wt");
if(file == NULL) {
JANUS_LOG(LOG_ERR, "Couldn't save configuration file, error opening file '%s'...\n", path);
return -3;
}
/* Print a header */
char date[64], header[256];
struct tm tmresult;
time_t ltime = time(NULL);
localtime_r(<ime, &tmresult);
strftime(date, sizeof(date), "%a %b %e %T %Y", &tmresult);
g_snprintf(header, 256, ";\n; File automatically generated on %s\n;\n\n", date);
fwrite(header, sizeof(char), strlen(header), file);
/* Go on with the configuration */
if(config->items) {
GList *l = config->items;
while(l) {
janus_config_item *i = (janus_config_item *)l->data;
if(i->name && i->value) {
fwrite(i->name, sizeof(char), strlen(i->name), file);
fwrite(" = ", sizeof(char), 3, file);
fwrite(i->value, sizeof(char), strlen(i->value), file);
fwrite("\n", sizeof(char), 1, file);
}
l = l->next;
}
}
if(config->categories) {
GList *l = config->categories;
while(l) {
janus_config_category *c = (janus_config_category *)l->data;
if(c->name) {
fwrite("[", sizeof(char), 1, file);
fwrite(c->name, sizeof(char), strlen(c->name), file);
fwrite("]\n", sizeof(char), 2, file);
if(c->items) {
GList *li = c->items;
while(li) {
janus_config_item *i = (janus_config_item *)li->data;
if(i->name && i->value) {
fwrite(i->name, sizeof(char), strlen(i->name), file);
fwrite(" = ", sizeof(char), 3, file);
/* If the value contains a semicolon, escape it */
if(strchr(i->value, ';')) {
char *value = g_strdup(i->value);
value = janus_string_replace((char *)value, ";", "\\;");
fwrite(value, sizeof(char), strlen(value), file);
fwrite("\n", sizeof(char), 1, file);
g_free(value);
} else {
/* No need to escape */
fwrite(i->value, sizeof(char), strlen(i->value), file);
fwrite("\n", sizeof(char), 1, file);
}
}
li = li->next;
}
}
}
fwrite("\r\n", sizeof(char), 2, file);
l = l->next;
}
}
fclose(file);
return 0;
}
char *janus_sdp_merge(janus_ice_handle *handle, const char *origsdp) {
if(handle == NULL || origsdp == NULL)
return NULL;
sdp_session_t *anon = NULL;
sdp_parser_t *parser = sdp_parse(home, origsdp, strlen(origsdp), 0);
if(!(anon = sdp_session(parser))) {
JANUS_LOG(LOG_ERR, "[%"SCNu64"] Error parsing/merging SDP: %s\n", handle->handle_id, sdp_parsing_error(parser));
sdp_parser_free(parser);
return NULL;
}
/* Prepare SDP to merge */
gchar buffer[512];
memset(buffer, 0, 512);
char *sdp = (char*)calloc(BUFSIZE, sizeof(char));
if(sdp == NULL) {
JANUS_LOG(LOG_FATAL, "Memory error!\n");
sdp_parser_free(parser);
return NULL;
}
sdp[0] = '\0';
/* FIXME Any Plan B to take into account? */
int planb = strstr(origsdp, "a=planb:") ? 1 : 0;
if(planb) {
janus_flags_set(&handle->webrtc_flags, JANUS_ICE_HANDLE_WEBRTC_PLAN_B);
} else {
janus_flags_clear(&handle->webrtc_flags, JANUS_ICE_HANDLE_WEBRTC_PLAN_B);
}
/* Version v= */
g_strlcat(sdp,
"v=0\r\n", BUFSIZE);
/* Origin o= */
if(anon->sdp_origin) {
g_snprintf(buffer, 512,
"o=%s %"SCNu64" %"SCNu64" IN IP4 127.0.0.1\r\n", /* FIXME Should we fix the address? */
anon->sdp_origin->o_username ? anon->sdp_origin->o_username : "******",
anon->sdp_origin->o_id, anon->sdp_origin->o_version);
g_strlcat(sdp, buffer, BUFSIZE);
} else {
gint64 sessid = janus_get_monotonic_time();
gint64 version = sessid; /* FIXME This needs to be increased when it changes, so time should be ok */
g_snprintf(buffer, 512,
"o=%s %"SCNi64" %"SCNi64" IN IP4 127.0.0.1\r\n", /* FIXME Should we fix the address? */
"-", sessid, version);
g_strlcat(sdp, buffer, BUFSIZE);
}
/* Session name s= */
if(anon->sdp_subject && strlen(anon->sdp_subject) > 0) {
g_snprintf(buffer, 512, "s=%s\r\n", anon->sdp_subject);
} else {
g_snprintf(buffer, 512, "s=%s\r\n", "Meetecho Janus");
}
g_strlcat(sdp, buffer, BUFSIZE);
/* Timing t= */
g_snprintf(buffer, 512,
"t=%lu %lu\r\n", anon->sdp_time ? anon->sdp_time->t_start : 0, anon->sdp_time ? anon->sdp_time->t_stop : 0);
g_strlcat(sdp, buffer, BUFSIZE);
/* ICE Full or Lite? */
if(janus_ice_is_ice_lite_enabled()) {
/* Janus is acting in ICE Lite mode, advertize this */
g_strlcat(sdp, "a=ice-lite\r\n", BUFSIZE);
}
/* bundle: add new global attribute */
int audio = (strstr(origsdp, "m=audio") != NULL);
int video = (strstr(origsdp, "m=video") != NULL);
#ifdef HAVE_SCTP
int data = (strstr(origsdp, "DTLS/SCTP") && !strstr(origsdp, " 0 DTLS/SCTP"));
#else
int data = 0;
#endif
g_strlcat(sdp, "a=group:BUNDLE", BUFSIZE);
if(audio) {
g_snprintf(buffer, 512,
" %s", handle->audio_mid ? handle->audio_mid : "audio");
g_strlcat(sdp, buffer, BUFSIZE);
}
if(video) {
g_snprintf(buffer, 512,
" %s", handle->video_mid ? handle->video_mid : "video");
g_strlcat(sdp, buffer, BUFSIZE);
}
if(data) {
g_snprintf(buffer, 512,
" %s", handle->data_mid ? handle->data_mid : "data");
g_strlcat(sdp, buffer, BUFSIZE);
}
g_strlcat(sdp, "\r\n", BUFSIZE);
/* msid-semantic: add new global attribute */
g_strlcat(sdp,
"a=msid-semantic: WMS janus\r\n",
BUFSIZE);
char wms[BUFSIZE];
memset(wms, 0, BUFSIZE);
g_strlcat(wms, "WMS", BUFSIZE);
/* Copy other global attributes, if any */
if(anon->sdp_attributes) {
sdp_attribute_t *a = anon->sdp_attributes;
while(a) {
if(a->a_value == NULL) {
g_snprintf(buffer, 512,
"a=%s\r\n", a->a_name);
g_strlcat(sdp, buffer, BUFSIZE);
} else {
g_snprintf(buffer, 512,
"a=%s:%s\r\n", a->a_name, a->a_value);
g_strlcat(sdp, buffer, BUFSIZE);
}
a = a->a_next;
}
}
gboolean ipv6 = strstr(janus_get_public_ip(), ":") != NULL;
/* Media lines now */
if(anon->sdp_media) {
int audio = 0, video = 0;
#ifdef HAVE_SCTP
int data = 0;
#endif
sdp_media_t *m = anon->sdp_media;
janus_ice_stream *stream = NULL;
while(m) {
if(m->m_type == sdp_media_audio && m->m_port > 0) {
audio++;
if(audio > 1 || !handle->audio_id) {
JANUS_LOG(LOG_WARN, "[%"SCNu64"] Skipping audio line (we have %d audio lines, and the id is %d)\n", handle->handle_id, audio, handle->audio_id);
g_strlcat(sdp, "m=audio 0 RTP/SAVPF 0\r\n", BUFSIZE);
/* FIXME Adding a c-line anyway because otherwise Firefox complains? ("c= connection line not specified for every media level, validation failed") */
g_snprintf(buffer, 512,
"c=IN %s %s\r\n", ipv6 ? "IP6" : "IP4", janus_get_public_ip());
g_strlcat(sdp, buffer, BUFSIZE);
m = m->m_next;
continue;
}
/* Audio */
stream = g_hash_table_lookup(handle->streams, GUINT_TO_POINTER(handle->audio_id));
if(stream == NULL) {
JANUS_LOG(LOG_WARN, "[%"SCNu64"] Skipping audio line (invalid stream %d)\n", handle->handle_id, handle->audio_id);
g_strlcat(sdp, "m=audio 0 RTP/SAVPF 0\r\n", BUFSIZE);
/* FIXME Adding a c-line anyway because otherwise Firefox complains? ("c= connection line not specified for every media level, validation failed") */
g_snprintf(buffer, 512,
"c=IN %s %s\r\n", ipv6 ? "IP6" : "IP4", janus_get_public_ip());
g_strlcat(sdp, buffer, BUFSIZE);
m = m->m_next;
continue;
}
g_strlcat(sdp, "m=audio 1 RTP/SAVPF", BUFSIZE);
} else if(m->m_type == sdp_media_video && m->m_port > 0) {
video++;
gint id = handle->video_id;
if(id == 0 && janus_flags_is_set(&handle->webrtc_flags, JANUS_ICE_HANDLE_WEBRTC_BUNDLE))
id = handle->audio_id > 0 ? handle->audio_id : handle->video_id;
if(video > 1 || !id) {
JANUS_LOG(LOG_WARN, "[%"SCNu64"] Skipping video line (we have %d video lines, and the id is %d)\n", handle->handle_id, video,
janus_flags_is_set(&handle->webrtc_flags, JANUS_ICE_HANDLE_WEBRTC_BUNDLE) ? handle->audio_id : handle->video_id);
g_strlcat(sdp, "m=video 0 RTP/SAVPF 0\r\n", BUFSIZE);
/* FIXME Adding a c-line anyway because otherwise Firefox complains? ("c= connection line not specified for every media level, validation failed") */
g_snprintf(buffer, 512,
"c=IN %s %s\r\n", ipv6 ? "IP6" : "IP4", janus_get_public_ip());
g_strlcat(sdp, buffer, BUFSIZE);
m = m->m_next;
continue;
}
/* Video */
stream = g_hash_table_lookup(handle->streams, GUINT_TO_POINTER(id));
if(stream == NULL) {
JANUS_LOG(LOG_WARN, "[%"SCNu64"] Skipping video line (invalid stream %d)\n", handle->handle_id, id);
g_strlcat(sdp, "m=video 0 RTP/SAVPF 0\r\n", BUFSIZE);
/* FIXME Adding a c-line anyway because otherwise Firefox complains? ("c= connection line not specified for every media level, validation failed") */
g_snprintf(buffer, 512,
"c=IN %s %s\r\n", ipv6 ? "IP6" : "IP4", janus_get_public_ip());
g_strlcat(sdp, buffer, BUFSIZE);
m = m->m_next;
continue;
}
g_strlcat(sdp, "m=video 1 RTP/SAVPF", BUFSIZE);
#ifdef HAVE_SCTP
} else if(m->m_type == sdp_media_application) {
/* Is this SCTP for DataChannels? */
if(m->m_port > 0 && m->m_proto_name != NULL && !strcasecmp(m->m_proto_name, "DTLS/SCTP") && m->m_port > 0) {
/* Yep */
data++;
gint id = handle->data_id;
if(id == 0 && janus_flags_is_set(&handle->webrtc_flags, JANUS_ICE_HANDLE_WEBRTC_BUNDLE))
id = handle->audio_id > 0 ? handle->audio_id : handle->video_id;
if(data > 1 || !id) {
JANUS_LOG(LOG_WARN, "[%"SCNu64"] Skipping SCTP line (we have %d SCTP lines, and the id is %d)\n", handle->handle_id, data, id);
g_snprintf(buffer, 512,
"m=%s 0 %s 0\r\n",
m->m_type_name, m->m_proto_name);
g_strlcat(sdp, buffer, BUFSIZE);
/* FIXME Adding a c-line anyway because otherwise Firefox complains? ("c= connection line not specified for every media level, validation failed") */
g_snprintf(buffer, 512,
"c=IN %s %s\r\n", ipv6 ? "IP6" : "IP4", janus_get_public_ip());
g_strlcat(sdp, buffer, BUFSIZE);
m = m->m_next;
continue;
}
/* SCTP */
stream = g_hash_table_lookup(handle->streams, GUINT_TO_POINTER(id));
if(stream == NULL) {
JANUS_LOG(LOG_WARN, "[%"SCNu64"] Skipping SCTP line (invalid stream %d)\n", handle->handle_id, id);
g_snprintf(buffer, 512,
"m=%s 0 %s 0\r\n",
m->m_type_name, m->m_proto_name);
g_strlcat(sdp, buffer, BUFSIZE);
/* FIXME Adding a c-line anyway because otherwise Firefox complains? ("c= connection line not specified for every media level, validation failed") */
g_snprintf(buffer, 512,
"c=IN %s %s\r\n", ipv6 ? "IP6" : "IP4", janus_get_public_ip());
g_strlcat(sdp, buffer, BUFSIZE);
m = m->m_next;
continue;
}
g_strlcat(sdp, "m=application 1 DTLS/SCTP", BUFSIZE);
} else {
JANUS_LOG(LOG_WARN, "[%"SCNu64"] Skipping unsupported application media line...\n", handle->handle_id);
g_snprintf(buffer, 512,
"m=%s 0 %s 0\r\n",
m->m_type_name, m->m_proto_name);
g_strlcat(sdp, buffer, BUFSIZE);
m = m->m_next;
continue;
}
#endif
} else {
JANUS_LOG(LOG_WARN, "[%"SCNu64"] Skipping disabled/unsupported media line...\n", handle->handle_id);
g_snprintf(buffer, 512,
"m=%s 0 %s 0\r\n",
m->m_type_name, m->m_proto_name);
g_strlcat(sdp, buffer, BUFSIZE);
/* FIXME Adding a c-line anyway because otherwise Firefox complains? ("c= connection line not specified for every media level, validation failed") */
g_snprintf(buffer, 512,
"c=IN %s %s\r\n", ipv6 ? "IP6" : "IP4", janus_get_public_ip());
g_strlcat(sdp, buffer, BUFSIZE);
m = m->m_next;
continue;
}
/* Add formats now */
if(!m->m_rtpmaps) {
JANUS_LOG(LOG_VERB, "[%"SCNu64"] No RTP maps?? trying formats...\n", handle->handle_id);
if(!m->m_format) {
JANUS_LOG(LOG_ERR, "[%"SCNu64"] No formats either?? this sucks!\n", handle->handle_id);
g_strlcat(sdp, " 0", BUFSIZE); /* FIXME Won't work apparently */
} else {
sdp_list_t *fmt = m->m_format;
while(fmt) {
g_snprintf(buffer, 512, " %s", fmt->l_text);
g_strlcat(sdp, buffer, BUFSIZE);
fmt = fmt->l_next;
}
}
} else {
sdp_rtpmap_t *r = m->m_rtpmaps;
while(r) {
g_snprintf(buffer, 512, " %d", r->rm_pt);
g_strlcat(sdp, buffer, BUFSIZE);
r = r->rm_next;
}
}
g_strlcat(sdp, "\r\n", BUFSIZE);
/* Media connection c= */
g_snprintf(buffer, 512,
"c=IN %s %s\r\n", ipv6 ? "IP6" : "IP4", janus_get_public_ip());
g_strlcat(sdp, buffer, BUFSIZE);
/* Any bandwidth? */
if(m->m_bandwidths) {
g_snprintf(buffer, 512,
"b=%s:%lu\r\n", /* FIXME Are we doing this correctly? */
m->m_bandwidths->b_modifier_name ? m->m_bandwidths->b_modifier_name : "AS",
m->m_bandwidths->b_value);
g_strlcat(sdp, buffer, BUFSIZE);
}
/* a=mid:(audio|video|data) */
switch(m->m_type) {
case sdp_media_audio:
g_snprintf(buffer, 512, "a=mid:%s\r\n", handle->audio_mid ? handle->audio_mid : "audio");
break;
case sdp_media_video:
g_snprintf(buffer, 512, "a=mid:%s\r\n", handle->video_mid ? handle->video_mid : "video");
break;
#ifdef HAVE_SCTP
case sdp_media_application:
/* FIXME sctpmap and webrtc-datachannel should be dynamic */
g_snprintf(buffer, 512, "a=mid:%s\r\na=sctpmap:5000 webrtc-datachannel 16\r\n",
handle->data_mid ? handle->data_mid : "data");
break;
#endif
default:
break;
}
g_strlcat(sdp, buffer, BUFSIZE);
if(m->m_type != sdp_media_application) {
/* What is the direction? */
switch(m->m_mode) {
case sdp_sendonly:
g_strlcat(sdp, "a=sendonly\r\n", BUFSIZE);
break;
case sdp_recvonly:
g_strlcat(sdp, "a=recvonly\r\n", BUFSIZE);
break;
case sdp_inactive:
g_strlcat(sdp, "a=inactive\r\n", BUFSIZE);
break;
case sdp_sendrecv:
default:
g_strlcat(sdp, "a=sendrecv\r\n", BUFSIZE);
break;
}
/* rtcp-mux */
g_snprintf(buffer, 512, "a=rtcp-mux\n");
g_strlcat(sdp, buffer, BUFSIZE);
/* RTP maps */
if(m->m_rtpmaps) {
sdp_rtpmap_t *rm = NULL;
for(rm = m->m_rtpmaps; rm; rm = rm->rm_next) {
g_snprintf(buffer, 512, "a=rtpmap:%u %s/%lu%s%s\r\n",
rm->rm_pt, rm->rm_encoding, rm->rm_rate,
rm->rm_params ? "/" : "",
rm->rm_params ? rm->rm_params : "");
g_strlcat(sdp, buffer, BUFSIZE);
}
for(rm = m->m_rtpmaps; rm; rm = rm->rm_next) {
if(rm->rm_fmtp) {
g_snprintf(buffer, 512, "a=fmtp:%u %s\r\n", rm->rm_pt, rm->rm_fmtp);
g_strlcat(sdp, buffer, BUFSIZE);
}
}
}
}
/* ICE ufrag and pwd, DTLS fingerprint setup and connection a= */
gchar *ufrag = NULL;
gchar *password = NULL;
nice_agent_get_local_credentials(handle->agent, stream->stream_id, &ufrag, &password);
memset(buffer, 0, 100);
g_snprintf(buffer, 512,
"a=ice-ufrag:%s\r\n"
"a=ice-pwd:%s\r\n"
"a=ice-options:trickle\r\n"
"a=fingerprint:sha-256 %s\r\n"
"a=setup:%s\r\n"
"a=connection:new\r\n",
ufrag, password,
janus_dtls_get_local_fingerprint(),
janus_get_dtls_srtp_role(stream->dtls_role));
if(ufrag != NULL)
g_free(ufrag);
ufrag = NULL;
if(password != NULL)
g_free(password);
password = NULL;
g_strlcat(sdp, buffer, BUFSIZE);
/* Copy existing media attributes, if any */
if(m->m_attributes) {
sdp_attribute_t *a = m->m_attributes;
while(a) {
if(!strcmp(a->a_name, "planb")) {
/* Skip the fake planb attribute, it's for internal use only */
a = a->a_next;
continue;
}
if(a->a_value == NULL) {
g_snprintf(buffer, 512,
"a=%s\r\n", a->a_name);
g_strlcat(sdp, buffer, BUFSIZE);
} else {
g_snprintf(buffer, 512,
"a=%s:%s\r\n", a->a_name, a->a_value);
g_strlcat(sdp, buffer, BUFSIZE);
}
a = a->a_next;
}
}
/* Add last attributes, rtcp and ssrc (msid) */
if(!planb) {
/* Single SSRC */
if(m->m_type == sdp_media_audio && m->m_mode != sdp_inactive && m->m_mode != sdp_recvonly) {
g_snprintf(buffer, 512,
"a=ssrc:%"SCNu32" cname:janusaudio\r\n"
"a=ssrc:%"SCNu32" msid:janus janusa0\r\n"
"a=ssrc:%"SCNu32" mslabel:janus\r\n"
"a=ssrc:%"SCNu32" label:janusa0\r\n",
stream->audio_ssrc, stream->audio_ssrc, stream->audio_ssrc, stream->audio_ssrc);
g_strlcat(sdp, buffer, BUFSIZE);
} else if(m->m_type == sdp_media_video && m->m_mode != sdp_inactive && m->m_mode != sdp_recvonly) {
g_snprintf(buffer, 512,
"a=ssrc:%"SCNu32" cname:janusvideo\r\n"
"a=ssrc:%"SCNu32" msid:janus janusv0\r\n"
"a=ssrc:%"SCNu32" mslabel:janus\r\n"
"a=ssrc:%"SCNu32" label:janusv0\r\n",
stream->video_ssrc, stream->video_ssrc, stream->video_ssrc, stream->video_ssrc);
g_strlcat(sdp, buffer, BUFSIZE);
}
} else {
/* Multiple SSRCs */
char mslabel[255];
memset(mslabel, 0, 255);
if(m->m_attributes) {
char id[256];
uint32_t ssrc = 0;
sdp_attribute_t *a = m->m_attributes;
while(a) {
if(a->a_name == NULL || a->a_value == NULL || strcmp(a->a_name, "planb")) {
a = a->a_next;
continue;
}
if(sscanf(a->a_value, "%255s %"SCNu32"", id, &ssrc) != 2) {
JANUS_LOG(LOG_ERR, "Error parsing 'planb' attribute, skipping it...\n");
a = a->a_next;
continue;
}
JANUS_LOG(LOG_VERB, "Parsing 'planb' attribute: %s\n", a->a_value);
/* Add proper SSRC attributes */
if(m->m_type == sdp_media_audio) {
g_snprintf(buffer, 512,
"a=ssrc:%"SCNu32" cname:%saudio\r\n"
"a=ssrc:%"SCNu32" msid:%s %sa0\r\n"
"a=ssrc:%"SCNu32" mslabel:%s\r\n"
"a=ssrc:%"SCNu32" label:%sa0\r\n",
ssrc, id, ssrc, id, id, ssrc, id, ssrc, id);
} else if(m->m_type == sdp_media_video) {
g_snprintf(buffer, 512,
"a=ssrc:%"SCNu32" cname:%svideo\r\n"
"a=ssrc:%"SCNu32" msid:%s %sv0\r\n"
"a=ssrc:%"SCNu32" mslabel:%s\r\n"
"a=ssrc:%"SCNu32" label:%sv0\r\n",
ssrc, id, ssrc, id, id, ssrc, id, ssrc, id);
}
g_strlcat(sdp, buffer, BUFSIZE);
/* Add to msid-semantic, if needed */
if(!strstr(wms, id)) {
g_snprintf(mslabel, 255, " %s", id);
g_strlcat(wms, mslabel, BUFSIZE);
}
/* Go on */
a = a->a_next;
}
}
}
/* And now the candidates */
janus_ice_candidates_to_sdp(handle, sdp, stream->stream_id, 1);
if(!janus_flags_is_set(&handle->webrtc_flags, JANUS_ICE_HANDLE_WEBRTC_RTCPMUX) &&
m->m_type != sdp_media_application)
janus_ice_candidates_to_sdp(handle, sdp, stream->stream_id, 2);
/* Next */
m = m->m_next;
}
}
/* Do we need to update the msid-semantic attribute? */
if(planb) {
sdp = janus_string_replace(sdp, "WMS janus", wms);
}
sdp_parser_free(parser);
JANUS_LOG(LOG_VERB, " -------------------------------------------\n");
JANUS_LOG(LOG_VERB, " >> Merged (%zu --> %zu bytes)\n", strlen(origsdp), strlen(sdp));
JANUS_LOG(LOG_VERB, " -------------------------------------------\n");
JANUS_LOG(LOG_VERB, "%s\n", sdp);
return sdp;
}
/* 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;
}
/* Thread to handle incoming messages */
static void *janus_source_handler(void *data) {
JANUS_LOG(LOG_VERB, "Joining SourcePlugin handler thread\n");
janus_source_message *msg = NULL;
int error_code = 0;
char *error_cause = g_malloc0(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_source_message_free(msg);
continue;
}
janus_source_session *session = NULL;
janus_mutex_lock(&sessions_mutex);
if (g_hash_table_lookup(sessions, msg->handle) != NULL) {
session = (janus_source_session *)msg->handle->plugin_handle;
}
janus_mutex_unlock(&sessions_mutex);
if (!session) {
JANUS_LOG(LOG_ERR, "No session associated with this handle...\n");
janus_source_message_free(msg);
continue;
}
if (session->destroyed) {
janus_source_message_free(msg);
continue;
}
/* Handle request */
error_code = 0;
root = msg->message;
if (msg->message == NULL) {
JANUS_LOG(LOG_ERR, "No message??\n");
error_code = JANUS_SOURCE_ERROR_NO_MESSAGE;
g_snprintf(error_cause, 512, "%s", "No message??");
goto error;
}
if (!json_is_object(root)) {
JANUS_LOG(LOG_ERR, "JSON error: not an object\n");
error_code = JANUS_SOURCE_ERROR_INVALID_JSON;
g_snprintf(error_cause, 512, "JSON error: not an object");
goto error;
}
/* Parse request */
const char *msg_sdp_type = json_string_value(json_object_get(msg->jsep, "type"));
const char *msg_sdp = json_string_value(json_object_get(msg->jsep, "sdp"));
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_SOURCE_ERROR_INVALID_ELEMENT;
g_snprintf(error_cause, 512, "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_SOURCE_ERROR_INVALID_ELEMENT;
g_snprintf(error_cause, 512, "Invalid value (video should be a boolean)");
goto error;
}
json_t *bitrate = json_object_get(root, "bitrate");
if (bitrate && (!json_is_integer(bitrate) || json_integer_value(bitrate) < 0)) {
JANUS_LOG(LOG_ERR, "Invalid element (bitrate should be a positive integer)\n");
error_code = JANUS_SOURCE_ERROR_INVALID_ELEMENT;
g_snprintf(error_cause, 512, "Invalid value (bitrate should be a positive integer)");
goto error;
}
json_t *record = json_object_get(root, "record");
if (record && !json_is_boolean(record)) {
JANUS_LOG(LOG_ERR, "Invalid element (record should be a boolean)\n");
error_code = JANUS_SOURCE_ERROR_INVALID_ELEMENT;
g_snprintf(error_cause, 512, "Invalid value (record should be a boolean)");
goto error;
}
json_t *recfile = json_object_get(root, "filename");
if (recfile && !json_is_string(recfile)) {
JANUS_LOG(LOG_ERR, "Invalid element (filename should be a string)\n");
error_code = JANUS_SOURCE_ERROR_INVALID_ELEMENT;
g_snprintf(error_cause, 512, "Invalid value (filename should be a string)");
goto error;
}
json_t *id = json_object_get(root, "id");
if(id && !json_is_string(id)) {
JANUS_LOG(LOG_ERR, "Invalid element (id should be a string)\n");
error_code = JANUS_SOURCE_ERROR_INVALID_ELEMENT;
g_snprintf(error_cause, 512, "Invalid value (id should be positive string)");
goto error;
}
/* Enforce request */
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(id) {
session->id = g_strdup(json_string_value(id));
}
if (!audio && !video && !bitrate && !record && !id && !msg_sdp) {
JANUS_LOG(LOG_ERR, "No supported attributes (audio, video, bitrate, record, id, jsep) found\n");
error_code = JANUS_SOURCE_ERROR_INVALID_ELEMENT;
g_snprintf(error_cause, 512, "Message error: no supported attributes (audio, video, bitrate, record, id, jsep) found");
goto error;
}
/* Prepare JSON event */
json_t *event = json_object();
json_object_set_new(event, "source", json_string("event"));
json_object_set_new(event, "result", json_string("ok"));
if(!msg_sdp) {
int ret = gateway->push_event(msg->handle, &janus_source_plugin, msg->transaction, event, NULL);
JANUS_LOG(LOG_VERB, " >> %d (%s)\n", ret, janus_get_api_error(ret));
json_decref(event);
}
else {
/* Forward the same offer to the gateway, to start the source plugin */
const char *type = NULL;
if (!strcasecmp(msg_sdp_type, "offer"))
type = "answer";
if (!strcasecmp(msg_sdp_type, "answer"))
type = "offer";
/* Any media direction that needs to be fixed? */
char *sdp = g_strdup(msg_sdp);
if (strstr(sdp, "a=recvonly")) {
/* Turn recvonly to inactive, as we simply bounce media back */
sdp = janus_string_replace(sdp, "a=recvonly", "a=inactive");
}
else if (strstr(sdp, "a=sendonly")) {
/* Turn sendonly to recvonly */
sdp = janus_string_replace(sdp, "a=sendonly", "a=recvonly");
/* FIXME We should also actually not echo this media back, though... */
}
/* Make also sure we get rid of ULPfec, red, etc. */
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", "");
}
json_t *jsep = json_pack("{ssss}", "type", type, "sdp", sdp);
sdp = janus_source_do_codec_negotiation(session, sdp);
/* How long will the gateway take to push the event? */
g_atomic_int_set(&session->hangingup, 0);
gint64 start = janus_get_monotonic_time();
int res = gateway->push_event(msg->handle, &janus_source_plugin, msg->transaction, event, jsep);
JANUS_LOG(LOG_VERB, " >> Pushing event: %d (took %"SCNu64" us)\n",
res, janus_get_monotonic_time() - start);
g_free(sdp);
/* We don't need the event and jsep anymore */
json_decref(event);
json_decref(jsep);
}
janus_source_message_free(msg);
continue;
error:
{
/* Prepare JSON error event */
json_t *event = json_object();
json_object_set_new(event, "source", json_string("event"));
json_object_set_new(event, "error_code", json_integer(error_code));
json_object_set_new(event, "error", json_string(error_cause));
int ret = gateway->push_event(msg->handle, &janus_source_plugin, msg->transaction, event, NULL);
JANUS_LOG(LOG_VERB, " >> %d (%s)\n", ret, janus_get_api_error(ret));
janus_source_message_free(msg);
/* We don't need the event anymore */
json_decref(event);
}
}
g_free(error_cause);
JANUS_LOG(LOG_VERB, "Leaving SourcePlugin handler thread\n");
return NULL;
}
