add support for sintela protobuf format

dascore/data_registry.txt

@@ -48,3 +48,4 @@ febus_dts_single_reading.h5 e81c7225e6061e6c0ac7fc42d9d623b0c79d20d7ef367a7513a2
 ofl100_1.sor 2af23609ac952f588d97ee195338f44227f61322422756e54a5c4a18b6704749 https://github.com/dasdae/test_data/raw/master/otdr/ofl100_1.sor
 ofl100_2.sor d8787d6171e2a2b3c6443c28b724440274694d525da617202c6b7a7bb2e13a8c https://github.com/dasdae/test_data/raw/master/otdr/ofl100_2.sor
 ofl100_3.sor d9167fffc91565eaa48b65fd55e5f0600b7a96ebac549f1b2344ffb7bacf2336 https://github.com/dasdae/test_data/raw/master/otdr/ofl100_3.sor
+sintela_protobuf_1.pb cafa038c033cb5e4cf4aa90bab203eb1e10dc05a6052c0576dc80d6a5b3b42dc https://github.com/dasdae/test_data/raw/master/das/sintela_protobuf_1.pb

dascore/io/sintela/__init__.py

@@ -0,0 +1,5 @@
+"""
+Sintela readers.
+"""
+from .core import SintelaBinaryV3
+from .core import SintelaProtobufV1

dascore/io/sintela_binary/core.py → dascore/io/sintela/core.py

@@ -11,6 +11,7 @@
 from dascore.io import FiberIO, ScanPayload
 from dascore.utils.io import BinaryReader, LocalBinaryReader
 
+from .protobuf_utils import get_supported_family_tag, read_payload, scan_payload
 from .utils import (
     _HEADER_SIZES,
     SYNC_WORD,
@@ -79,3 +80,34 @@ def read(
         )
 
         return dc.spool(patch)
+
+
+class SintelaProtobufV1(FiberIO):
+    """IO class for Sintela protobuf MTLV recordings."""
+
+    name = "Sintela_Protobuf"
+    preferred_extensions = ("pb",)
+    version = "1"
+
+    def get_format(self, resource: BinaryReader, **kwargs) -> tuple[str, str] | bool:
+        """Return the format/version tuple if the file is Sintela protobuf."""
+        position = resource.tell()
+        try:
+            tag = get_supported_family_tag(resource)
+        finally:
+            resource.seek(position)
+        return (self.name, self.version) if tag else False
+
+    def scan(self, resource: BinaryReader, **kwargs) -> list[ScanPayload]:
+        """Scan a Sintela protobuf recording."""
+        return scan_payload(resource)
+
+    def read(self, resource: BinaryReader, **kwargs) -> dc.BaseSpool:
+        """Read a Sintela protobuf recording into a spool."""
+        data, coords, attrs = read_payload(resource)
+        selectors = {name: kwargs[name] for name in coords.dims if name in kwargs}
+        if selectors:
+            coords, data = coords.select(data, **selectors)
+        if not np.size(data):
+            return dc.spool([])
+        return dc.spool([dc.Patch(data=data, coords=coords, attrs=attrs)])