Henri Verbeet : mfreadwrite/reader: Only attempt to copy sample buffers from responses with non-NULL samples.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 76db4b2459920eb2e2004255e3388b069dd1d6f9
URL:    https://gitlab.winehq.org/wine/wine/-/commit/76db4b2459920eb2e2004255e3388b0...

Author: Henri Verbeet <hverbeet(a)codeweavers.com>
Date:   Tue Aug 23 10:38:41 2022 +0200

mfreadwrite/reader: Only attempt to copy sample buffers from responses with non-NULL samples.

For example, queueing a MF_SOURCE_READERF_ENDOFSTREAM response will set
a NULL sample. This fixes a regression introduced by commit
68fa3f673633c138596b86ad2ed1befcd0cc63c5.

---

 dlls/mfreadwrite/reader.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dlls/mfreadwrite/reader.c b/dlls/mfreadwrite/reader.c
index f29d48b6a9e..5296e77f3c3 100644
--- a/dlls/mfreadwrite/reader.c
+++ b/dlls/mfreadwrite/reader.c
@@ -958,7 +958,7 @@ static struct stream_response *media_stream_pop_response(struct source_reader *r
 
         if (!stream) stream = &reader->streams[response->stream_index];
 
-        if (stream->allocator)
+        if (response->sample && stream->allocator)
         {
             /* Return allocation error to the caller, while keeping original response sample in for later. */
             if (SUCCEEDED(hr = IMFVideoSampleAllocatorEx_AllocateSample(stream->allocator, &sample)))