Add max_simultaneous_engine_requests parameter

src/camera-manager/manager.ts

@@ -112,6 +112,7 @@ export class CameraManager {
   protected _engineFactory: CameraManagerEngineFactory;
   protected _store: CameraManagerStore;
   protected _initializationLimit = new PQueue({ concurrency: 1 });
+  protected _requestLimit = new PQueue();
 
   constructor(
     api: CardCameraAPI,
@@ -135,6 +136,9 @@ export class CameraManager {
       return false;
     }
 
+    this._requestLimit.concurrency =
+      config.performance.features.max_simultaneous_engine_requests ?? Infinity;
+
     // For each camera merge the config (which has no defaults) into the camera
     // global config (which does have defaults). The merging must happen in this
     // order, to ensure that the defaults in the cameras global config do not
@@ -535,7 +539,10 @@ export class CameraManager {
     }
 
     const queryStartTime = new Date();
-    await engine.favoriteMedia(hass, cameraConfig, media, favorite);
+
+    await this._requestLimit.add(() =>
+      engine.favoriteMedia(hass, cameraConfig, media, favorite),
+    );
 
     log(
       this._api.getConfigManager().getCardWideConfig(),
@@ -590,7 +597,11 @@ export class CameraManager {
       return null;
     }
 
-    return await engine.getMediaSeekTime(hass, this._store, media, target);
+    return (
+      (await this._requestLimit.add(() =>
+        engine.getMediaSeekTime(hass, this._store, media, target),
+      )) ?? null
+    );
   }
 
   protected async _handleQuery<QT extends DataQuery>(
@@ -653,7 +664,9 @@ export class CameraManager {
       }
       await Promise.all(
         Array.from(engines.keys()).map((engine) =>
-          processEngineQuery(engine, { ...query, cameraIDs: engines.get(engine) }),
+          this._requestLimit.add(() =>
+            processEngineQuery(engine, { ...query, cameraIDs: engines.get(engine) }),
+          ),
         ),
       );
     };
@@ -789,6 +802,8 @@ export class CameraManager {
     if (!engine || !hass) {
       return;
     }
-    return await engine.executePTZAction(hass, cameraConfig, action, options);
+    return await this._requestLimit.add(() =>
+      engine.executePTZAction(hass, cameraConfig, action, options),
+    );
   }
 }

src/config/profiles/low-performance.ts

@@ -35,6 +35,7 @@ import {
   CONF_MENU_BUTTONS_TIMELINE,
   CONF_MENU_STYLE,
   CONF_PERFORMANCE_FEATURES_ANIMATED_PROGRESS_INDICATOR,
+  CONF_PERFORMANCE_FEATURES_MAX_SIMULTANEOUS_ENGINE_REQUESTS,
   CONF_PERFORMANCE_FEATURES_MEDIA_CHUNK_SIZE,
   CONF_PERFORMANCE_STYLE_BORDER_RADIUS,
   CONF_PERFORMANCE_STYLE_BOX_SHADOW,
@@ -137,4 +138,7 @@ export const LOW_PERFORMANCE_PROFILE = {
 
   // No trigger actions.
   [CONF_VIEW_TRIGGERS_ACTIONS_TRIGGER]: 'none',
+
+  // One engine request at a time.
+  [CONF_PERFORMANCE_FEATURES_MAX_SIMULTANEOUS_ENGINE_REQUESTS]: 1,
 };

src/config/types.ts

@@ -1913,6 +1913,7 @@ export const performanceConfigSchema = z
           .min(0)
           .max(MEDIA_CHUNK_SIZE_MAX)
           .default(performanceConfigDefault.features.media_chunk_size),
+        max_simultaneous_engine_requests: z.number().min(1).optional(),
       })
       .default(performanceConfigDefault.features),
     style: z

src/const.ts

@@ -348,6 +348,7 @@ export const CONF_OVERRIDES = 'overrides' as const;
 const CONF_PERFORMANCE = 'performance' as const;
 export const CONF_PERFORMANCE_FEATURES_ANIMATED_PROGRESS_INDICATOR = `${CONF_PERFORMANCE}.features.animated_progress_indicator`;
 export const CONF_PERFORMANCE_FEATURES_MEDIA_CHUNK_SIZE = `${CONF_PERFORMANCE}.features.media_chunk_size`;
+export const CONF_PERFORMANCE_FEATURES_MAX_SIMULTANEOUS_ENGINE_REQUESTS = `${CONF_PERFORMANCE}.features.max_simultaneous_engine_requests`;
 export const CONF_PERFORMANCE_PROFILE = `${CONF_PERFORMANCE}.profile`;
 export const CONF_PERFORMANCE_STYLE_BOX_SHADOW = `${CONF_PERFORMANCE}.style.box_shadow`;
 export const CONF_PERFORMANCE_STYLE_BORDER_RADIUS = `${CONF_PERFORMANCE}.style.border_radius`;

src/editor.ts

@@ -171,6 +171,7 @@ import {
   CONF_MENU_POSITION,
   CONF_MENU_STYLE,
   CONF_PERFORMANCE_FEATURES_ANIMATED_PROGRESS_INDICATOR,
+  CONF_PERFORMANCE_FEATURES_MAX_SIMULTANEOUS_ENGINE_REQUESTS,
   CONF_PERFORMANCE_FEATURES_MEDIA_CHUNK_SIZE,
   CONF_PERFORMANCE_PROFILE,
   CONF_PERFORMANCE_STYLE_BORDER_RADIUS,
@@ -2790,6 +2791,12 @@ export class FrigateCardEditor extends LitElement implements LovelaceCardEditor
                   ${this._renderNumberInput(CONF_PERFORMANCE_FEATURES_MEDIA_CHUNK_SIZE, {
                     max: MEDIA_CHUNK_SIZE_MAX,
                   })}
+                  ${this._renderNumberInput(
+                    CONF_PERFORMANCE_FEATURES_MAX_SIMULTANEOUS_ENGINE_REQUESTS,
+                    {
+                      min: 1,
+                    },
+                  )}
                 `,
               )}
               ${this._putInSubmenu(

src/localize/languages/ca.json

@@ -401,6 +401,7 @@
       "features": {
         "animated_progress_indicator": "Indicador animat del progrés",
         "editor_label": "Opcions de característiques",
+        "max_simultaneous_engine_requests": "",
         "media_chunk_size": "Mida del fragment multimèdia"
       },
       "style": {

src/localize/languages/en.json

@@ -401,6 +401,7 @@
       "features": {
         "animated_progress_indicator": "Animated Progress Indicator",
         "editor_label": "Feature Options",
+        "max_simultaneous_engine_requests": "Max simultaneous camera engine requests",
         "media_chunk_size": "Media chunk size"
       },
       "style": {

src/localize/languages/fr.json

@@ -401,6 +401,7 @@
       "features": {
         "animated_progress_indicator": "Indicateur de progression animé",
         "editor_label": "Options de fonctionnalités",
+        "max_simultaneous_engine_requests": "",
         "media_chunk_size": "Taille du morceau de média"
       },
       "style": {

src/localize/languages/it.json

@@ -401,6 +401,7 @@
       "features": {
         "animated_progress_indicator": "Indicatore di avanzamento animato",
         "editor_label": "Opzioni funzionalità",
+        "max_simultaneous_engine_requests": "",
         "media_chunk_size": "Dimensione del blocco multimediale"
       },
       "style": {

src/localize/languages/pt-BR.json

@@ -401,6 +401,7 @@
       "features": {
         "animated_progress_indicator": "Indicador de Carregamento Animado",
         "editor_label": "Opções de recursos",
+        "max_simultaneous_engine_requests": "",
         "media_chunk_size": "Tamanho do bloco de mídia"
       },
       "style": {

src/localize/languages/pt-PT.json

@@ -401,6 +401,7 @@
       "features": {
         "animated_progress_indicator": "Animação na barra de progresso",
         "editor_label": "Editor de etiquetas",
+        "max_simultaneous_engine_requests": "",
         "media_chunk_size": "Tamanho do ficheiro"
       },
       "style": {