micromate/idf_file.py

@@ -326,7 +326,11 @@ class IdfReadResult:
     intervals:       Optional[list] = None  # list[IdfhInterval] for IDFH; None for IDFW
 
 
-def read_idf_file(path: Union[str, Path]) -> IdfReadResult:
+def read_idf_file(
+    path: Union[str, Path],
+    *,
+    data: Optional[bytes] = None,
+) -> IdfReadResult:
     """Parse a Thor ``.IDFW`` binary into an ``IdfEvent`` + decoded samples.
 
     Currently implements signature-A waveforms only.  Signature-B
@@ -337,9 +341,14 @@ def read_idf_file(path: Union[str, Path]) -> IdfReadResult:
     Returns an :class:`IdfReadResult`.  The caller converts int sample
     counts to physical units via :func:`geo_count_to_ips` /
     :func:`mic_count_to_psi`.
+
+    ``path`` is used for filename in error messages and ``.IDFH`` vs
+    ``.IDFW`` suffix detection.  When ``data`` is supplied the disk
+    read is skipped — useful for ingest paths that already have the
+    bytes in memory and where the file may not exist on disk yet.
     """
     p = Path(path)
-    buf = p.read_bytes()
+    buf = data if data is not None else p.read_bytes()
 
     if len(buf) < 16 or buf[6:16] != _INSTANTEL_TAG + b"\x00":
         raise ValueError(f"{p.name}: not an IDF file (missing Instantel magic)")

sfm/waveform_store.py

@@ -500,7 +500,12 @@ class WaveformStore:
         is_histogram = False
         try:
             from micromate.idf_file import read_idf_file
-            res = read_idf_file(source_path)
+            # Pass idf_bytes through `data=` — at this point in the flow
+            # the binary hasn't been written to disk yet, so the codec
+            # can't read from source_path.  We still pass source_path so
+            # the codec has the filename for error messages + .IDFH
+            # suffix detection.
+            res = read_idf_file(source_path, data=idf_bytes)
             idf_samples = res.samples or None
             idf_intervals = res.intervals
             is_histogram = res.intervals is not None