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-rwxr-xr-xaudio/out/ao_wasapi_utils.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/audio/out/ao_wasapi_utils.c b/audio/out/ao_wasapi_utils.c
index d491f017ea..8a57c8660b 100755
--- a/audio/out/ao_wasapi_utils.c
+++ b/audio/out/ao_wasapi_utils.c
@@ -172,8 +172,7 @@ static void set_format(WAVEFORMATEXTENSIBLE *wformat, WORD bytepersample,
wformat->Format.nAvgBytesPerSec = samplerate * block_align;
wformat->Format.nBlockAlign = block_align;
wformat->Format.wBitsPerSample = bytepersample * 8;
- wformat->Format.cbSize =
- 22; /* must be at least 22 for WAVE_FORMAT_EXTENSIBLE */
+ wformat->Format.cbSize = sizeof(WAVEFORMATEXTENSIBLE) - sizeof(WAVEFORMATEX);
if (bytepersample == 4)
wformat->SubFormat = mp_KSDATAFORMAT_SUBTYPE_IEEE_FLOAT;
else