Read in 4 MB blocks

Refs:
- https://developer.mozilla.org/en-US/docs/Web/API/TransformStream/TransformStream

web/apps/photos/src/services/upload/uploadService.ts

@@ -774,9 +774,18 @@ const computeHash = async (
     console.log("got stream and chunks", stream, chunkCount);
     const hashState = await worker.initChunkHashing();
 
-    const streamReader = stream.getReader();
+    const chunkedStream = stream.pipeThrough(
+        new TransformStream(
+            undefined,
+            new ByteLengthQueuingStrategy({
+                highWaterMark: ENCRYPTION_CHUNK_SIZE,
+            }),
+        ),
+    );
+    const streamReader = chunkedStream.getReader();
     for (let i = 0; i < chunkCount; i++) {
         const { done, value: chunk } = await streamReader.read();
+        console.log("chunk size", chunk.length);
         if (done) throw new Error("Less chunks than expected");
         await worker.hashFileChunk(hashState, Uint8Array.from(chunk));
     }