Representation bandwidth based cache Response detection timeout

src/streaming/models/MetricsModel.js

@@ -197,6 +197,7 @@ function MetricsModel(config) {
         vo._fileLoaderType = request.fileLoaderType;
         vo._resourceTimingValues = request.resourceTimingValues;
         vo._streamId = request && request.representation && request.representation.mediaInfo && request.representation.mediaInfo.streamInfo ? request.representation.mediaInfo.streamInfo.id : null;
+        vo._bandwidthRatio = request && request.bandwidth && request.representation && request.representation.mediaInfo ? request.representation.mediaInfo.bitrateList[request.representation.mediaInfo.bitrateList.length - 1].bandwidth / request.bandwidth : 1;
 
         if (traces) {
             traces.forEach(trace => {

src/streaming/models/ThroughputModel.js

@@ -106,7 +106,7 @@ function ThroughputModel(config) {
                 }
             }
 
-            const cacheReferenceTime = (httpRequest._tfinish.getTime() - httpRequest.trequest.getTime());
+            const cacheReferenceTime = (httpRequest._tfinish.getTime() - httpRequest.trequest.getTime()) * httpRequest._bandwidthRatio;
 
             if (_isCachedResponse(mediaType, cacheReferenceTime, httpRequest)) {
                 logger.debug(`${mediaType} Assuming segment ${httpRequest.url} came from cache, ignoring it for throughput calculation`);

src/streaming/vo/metrics/HTTPRequest.js

@@ -141,6 +141,10 @@ class HTTPRequest {
          * The values derived from the ResourceTimingAPI.
          */
         this._resourceTimingValues = null;
+        /**
+         * The ratio of the current representation bandwidth to the top representation bandwidth - used for adjusting cachedetection to bitrate ladder.
+         */
+        this._bandwidthRatio = 1;
     }
 }
 

test/unit/test/streaming/streaming.models.ThroughputModel.js

@@ -148,6 +148,7 @@ describe('ThroughputModel', () => {
                 }
             })
             dummyHttpRequest._tfinish = dummyHttpRequest.trequest;
+            dummyHttpRequest._bandwidthRatio = 1;
             throughputModel.addEntry('video', dummyHttpRequest);
             const values = throughputModel.getThroughputDict('video');