fix: buffer start offset (#11)

* Fix start offset * Fix exifIDF offset
diegomura · Sep 20, 2024 · 472cc73 · 472cc73
1 parent 169f4a9
commit 472cc73
Showing 1 changed file with 3 additions and 2 deletions.
diff --git a/src/markers/exif.js b/src/markers/exif.js
@@ -251,11 +251,12 @@ class IDFEntries {
       return {};
     }
 
-    const entries = this._decodeIDFEntries(buffer, tags.ifd, offsetToFirstIFD);
+    const firstIFDBuffer = buffer.slice(offsetToFirstIFD - 8);
+    const entries = this._decodeIDFEntries(firstIFDBuffer, tags.ifd, offsetToFirstIFD);
     const { exifIFDPointer, gpsInfoIFDPointer } = entries;
 
     if (exifIFDPointer) {
-      buffer = buffer.slice(exifIFDPointer - offsetToFirstIFD);
+      buffer = buffer.slice(exifIFDPointer - 8);
       entries.subExif = this._decodeIDFEntries(
         buffer,
         tags.ifd,