add send_bytes method

Author: bcherry

livekit-protocol/protocol

@@ -18,6 +18,7 @@
 import asyncio
 import os
 import mimetypes
+import io
 import aiofiles
 from typing import List, Union, Callable, Dict, Awaitable, Optional, Mapping, cast, TypeVar
 from abc import abstractmethod, ABC
@@ -664,6 +665,82 @@ async def send_file(
 
         return writer.info
 
+    async def send_bytes(
+        self,
+        data: Union[bytes, bytearray, memoryview, io.IOBase],
+        name: str,
+        *,
+        mime_type: str = "application/octet-stream",
+        topic: str = "",
+        destination_identities: Optional[List[str]] = None,
+        attributes: Optional[Dict[str, str]] = None,
+        stream_id: str | None = None,
+    ) -> ByteStreamInfo:
+        """
+        Send in-memory bytes or a file-like object as a byte stream.
+
+        Accepts common Python byte/blob types: bytes, bytearray, memoryview, and readable io.IOBase
+        (e.g., io.BytesIO, buffered readers). The name is used for the stream metadata.
+        """
+        # Bytes-like input path
+        if isinstance(data, (bytes, bytearray, memoryview)):
+            buffer = bytes(data)
+            total_size = len(buffer)
+
+            writer: ByteStreamWriter = await self.stream_bytes(
+                name=name,
+                total_size=total_size,
+                mime_type=mime_type,
+                attributes=attributes,
+                stream_id=stream_id,
+                destination_identities=destination_identities,
+                topic=topic,
+            )
+
+            offset = 0
+            while offset < total_size:
+                end = min(offset + STREAM_CHUNK_SIZE, total_size)
+                await writer.write(buffer[offset:end])
+                offset = end
+
+            await writer.aclose()
+            return writer.info
+
+        # File-like input path
+        if isinstance(data, io.IOBase) and data.readable():
+            total_size: Optional[int] = None
+            try:
+                if data.seekable():
+                    current_pos = data.tell()
+                    data.seek(0, io.SEEK_END)
+                    end_pos = data.tell()
+                    total_size = end_pos - current_pos
+                    data.seek(current_pos, io.SEEK_SET)
+            except Exception:
+                total_size = None
+
+            writer = await self.stream_bytes(
+                name=name,
+                total_size=total_size,
+                mime_type=mime_type,
+                attributes=attributes,
+                stream_id=stream_id,
+                destination_identities=destination_identities,
+                topic=topic,
+            )
+
+            while True:
+                chunk = data.read(STREAM_CHUNK_SIZE)
+                if not chunk:
+                    break
+                await writer.write(chunk)
+            await writer.aclose()
+            return writer.info
+
+        raise TypeError(
+            "Unsupported data type for send_bytes. Expected bytes, bytearray, memoryview, or a readable io.IOBase."
+        )
+
     async def publish_track(
         self, track: LocalTrack, options: TrackPublishOptions = TrackPublishOptions()
     ) -> LocalTrackPublication: