Derek Lesho : winegstreamer: Require media source's IMFByteStream to be seekable.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 964cf9cfce5c4eec804db0294dfdb33a76488168
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=964cf9cfce5c4eec804db0294dfdb33a76488168

Author: Derek Lesho <dlesho at codeweavers.com>
Date:   Mon Nov  2 15:48:33 2020 -0600

winegstreamer: Require media source's IMFByteStream to be seekable.

Signed-off-by: Derek Lesho <dlesho at codeweavers.com>
Signed-off-by: Nikolay Sivov <nsivov at codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>

---

 dlls/winegstreamer/media_source.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/dlls/winegstreamer/media_source.c b/dlls/winegstreamer/media_source.c
index 06f35ce24b6..e69eeba4294 100644
--- a/dlls/winegstreamer/media_source.c
+++ b/dlls/winegstreamer/media_source.c
@@ -1235,6 +1235,7 @@ static HRESULT media_source_constructor(IMFByteStream *bytestream, struct media_
 
     struct media_source *object = heap_alloc_zero(sizeof(*object));
     IMFStreamDescriptor **descriptors = NULL;
+    DWORD bytestream_caps;
     unsigned int i;
     HRESULT hr;
     int ret;
@@ -1242,6 +1243,15 @@ static HRESULT media_source_constructor(IMFByteStream *bytestream, struct media_
     if (!object)
         return E_OUTOFMEMORY;
 
+    if (FAILED(hr = IMFByteStream_GetCapabilities(bytestream, &bytestream_caps)))
+        return hr;
+
+    if (!(bytestream_caps & MFBYTESTREAM_IS_SEEKABLE))
+    {
+        FIXME("Non-seekable bytestreams not supported.\n");
+        return MF_E_BYTESTREAM_NOT_SEEKABLE;
+    }
+
     object->IMFMediaSource_iface.lpVtbl = &IMFMediaSource_vtbl;
     object->async_commands_callback.lpVtbl = &source_async_commands_callback_vtbl;
     object->ref = 1;