feat: Improve latency in LL DASH streams (#5820)

This change causes the prefetch to be called much earlier, which improves latency in DASH streams in around 500ms.
shaka-project · Oct 27, 2023 · 20b4abf · 20b4abf
1 parent 8ff204d
commit 20b4abf
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/lib/media/streaming_engine.js b/lib/media/streaming_engine.js
@@ -1381,6 +1381,10 @@ shaka.media.StreamingEngine = class {
             await this.append_(
                 mediaState, presentationTime, stream, reference, dataToAppend,
                 /* isChunkedData= */ true);
+
+            if (mediaState.segmentPrefetch && mediaState.segmentIterator) {
+              mediaState.segmentPrefetch.prefetchSegments(reference);
+            }
           }
         };
 
@@ -1411,6 +1415,10 @@ shaka.media.StreamingEngine = class {
           await this.append_(
               mediaState, presentationTime, stream, reference, result);
         }
+
+        if (mediaState.segmentPrefetch && mediaState.segmentIterator) {
+          mediaState.segmentPrefetch.prefetchSegments(reference);
+        }
       } else {
         if (this.config_.lowLatencyMode && !isReadableStreamSupported) {
           shaka.log.warning('Low latency streaming mode is enabled, but ' +