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janus: changed camera events, added "lost" event

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This commit is contained in:
Maxim Devaev
2026-07-26 16:56:01 +03:00
parent 64981efb73
commit 3106aa7ef0
1 changed files with 35 additions and 13 deletions
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48
janus/src/plugin.c
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@@ -386,8 +386,8 @@ static void *_aplay_thread(void *arg) {
return NULL;
}
static void _push_camera_event(bool requested) {
json_t *const json_event_type = json_string(requested ? "requested" : "released");
static void _unsafe_camera_push_event(const char *str) {
json_t *const json_event_type = json_string(str);
json_t *const camera = json_object();
json_object_set_new(camera, "action", json_event_type);
@@ -407,28 +407,45 @@ static void _push_camera_event(bool requested) {
json_decref(event);
}
static void _camera_set_active(uint width, uint height, uint fps) {
static void _camera_push_online(uint width, uint height, uint fps) {
bool again = false;
_LOCK_VPLAY;
if (_g_camera.active) {
_push_camera_event(false);
_unsafe_camera_push_event("offline");
again = true;
}
const uint old_width = _g_camera.width;
const uint old_height = _g_camera.height;
const uint old_fps = _g_camera.fps;
_g_camera.active = true;
_g_camera.width = width;
_g_camera.height = height;
_g_camera.fps = fps;
_push_camera_event(true);
_unsafe_camera_push_event("online");
_UNLOCK_VPLAY;
US_LOG_INFO("Camera requested%s: %ux%u@%u", (again ? " again" : ""), width, height, fps);
if (again) {
US_LOG_INFO("Camera changed: %ux%u@%u -> %ux%u@%u",
old_width, old_height, old_fps, width, height, fps);
} else {
US_LOG_INFO("Camera online: %ux%u@%u", width, height, fps);
}
}
static void _camera_set_inactive() {
static void _camera_push_offline() {
_LOCK_VPLAY;
if (_g_camera.active) {
_g_camera.active = false;
_push_camera_event(false);
US_LOG_INFO("Camera released");
_unsafe_camera_push_event("offline");
US_LOG_INFO("Camera offline");
}
_UNLOCK_VPLAY;
}
static void _camera_push_lost() {
_LOCK_VPLAY;
if (_g_camera.active) {
_unsafe_camera_push_event("lost");
US_LOG_INFO("Camera's source client is lost");
}
_UNLOCK_VPLAY;
}
@@ -486,7 +503,7 @@ static void *_vplay_thread(void *arg) {
if (w_get.width == c_width && w_get.height == c_height) {
if (us_memsink_server_x_is_consumed(sink)) {
if (!c_active) {
_camera_set_active(w_get.width, w_get.height, w_get.fps);
_camera_push_online(w_get.width, w_get.height, w_get.fps);
} else if (frame->used > 0) {
US_ONCE({ US_LOG_INFO("Streaming to the camera ..."); });
us_memsink_server_x_put(sink, frame);
@@ -498,7 +515,7 @@ static void *_vplay_thread(void *arg) {
}
}
} else { // Notify to changed resolution
_camera_set_active(w_get.width, w_get.height, w_get.fps);
_camera_push_online(w_get.width, w_get.height, w_get.fps);
}
} else {
US_ONCE({ US_LOG_ERROR("Got invalid format from the camera: %u", w_get.format); });
@@ -509,7 +526,7 @@ static void *_vplay_thread(void *arg) {
break;
case US_MSS_NO_CLIENT:
_camera_set_inactive();
_camera_push_offline();
break;
case US_MSS_BUSY: // Busy by some client
@@ -657,11 +674,13 @@ static void _plugin_destroy_session(janus_plugin_session* session, int *err) {
bool has_watchers = false;
bool has_listeners = false;
bool has_speakers = false;
bool camera_lost = false;
US_LIST_ITERATE(_g_clients, client, {
if (client->session == session) {
US_LOG_INFO("Removing session %p ...", session);
if (_g_camera.client == client) {
_g_camera.client = NULL; // Is it required to notify other clients?
_g_camera.client = NULL;
camera_lost = true;
}
US_LIST_REMOVE(_g_clients, client);
us_janus_client_destroy(client);
@@ -680,6 +699,9 @@ static void _plugin_destroy_session(janus_plugin_session* session, int *err) {
atomic_store(&_g_has_listeners, has_listeners);
atomic_store(&_g_has_speakers, has_speakers);
_UNLOCK_ALL;
if (camera_lost) {
_camera_push_lost();
}
}
static json_t *_plugin_query_session(janus_plugin_session *session) {