mf: Increase min_buffer_size to MF_MT_AUDIO_AVG_BYTES_PER_SECOND.

When it is specified. The Resampler transform exposes the block alignment in its output stream info cbSize, and the session then otherwise reads data one audio frame at a time.

mf: Increase min_buffer_size to MF_MT_AUDIO_AVG_BYTES_PER_SECOND.
6d64e407 · Rémi Bernon · Alexandre Julliard · c806c4ee · 6d64e407
Commit 6d64e407 authored Jun 27, 2022 by Rémi Bernon Committed by Alexandre Julliard Aug 01, 2022
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session.c dlls/mf/session.c +3 -0

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--- a/dlls/mf/session.c
+++ b/dlls/mf/session.c
@@ -1438,6 +1438,7 @@ static HRESULT session_set_transform_stream_info(struct topo_node *node)
    struct transform_stream *streams;
    unsigned int block_alignment;
    IMFMediaType *media_type;
+    UINT32 bytes_per_second;
    GUID major = { 0 };
    HRESULT hr;

@@ -1479,6 +1480,8 @@ static HRESULT session_set_transform_stream_info(struct topo_node *node)
                        && SUCCEEDED(IMFMediaType_GetUINT32(media_type, &MF_MT_AUDIO_BLOCK_ALIGNMENT, &block_alignment)))
                {
                    streams[i].min_buffer_size = block_alignment;
+                    if (SUCCEEDED(IMFMediaType_GetUINT32(media_type, &MF_MT_AUDIO_AVG_BYTES_PER_SECOND, &bytes_per_second)))
+                        streams[i].min_buffer_size = max(streams[i].min_buffer_size, bytes_per_second);
                }
                IMFMediaType_Release(media_type);
            }