[reactos] 01/01: [PORTCLS] Fix audio stutter with official AC97 driver (#3225)

[Michael Stamper]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=e45bacda07bd73be9e630f...

commit e45bacda07bd73be9e630fcd795640ad978c2c54
Author:     Michael Stamper [e-mail]
AuthorDate: Tue Sep 22 13:49:34 2020 +0000
Commit:     GitHub [e-mail]
CommitDate: Tue Sep 22 15:49:34 2020 +0200

[PORTCLS] Fix audio stutter with official AC97 driver (#3225)

Replace call to AllocatedBufferSize(), with BufferSize().

Indeed (quoting https://docs.microsoft.com/en-us/windows-hardware/drivers/ddi/portcls/nf-por... ):

> The BufferSize() method returns the buffer size that was set by the previous call to IDmaChannel::SetBufferSize(). If SetBufferSize() has not been called since the IDmaChannel::AllocateBuffer() call, BufferSize returns the allocated buffer size. The DMA-channel object does not actually use this value internally. This value is maintained by the object to **allow its various clients to communicate the intended size of the buffer**.

And this is exactly what we want to do.
---
 drivers/wdm/audio/backpln/portcls/pin_wavecyclic.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/wdm/audio/backpln/portcls/pin_wavecyclic.cpp b/drivers/wdm/audio/backpln/portcls/pin_wavecyclic.cpp
index e57fbefda74..31d787d08b0 100644
--- a/drivers/wdm/audio/backpln/portcls/pin_wavecyclic.cpp
+++ b/drivers/wdm/audio/backpln/portcls/pin_wavecyclic.cpp
@@ -1300,7 +1300,7 @@ CPortPinWaveCyclic::Init(
     m_Stream->SetState(KSSTATE_STOP);
     m_State = KSSTATE_STOP;
     m_CommonBufferOffset = 0;
-    m_CommonBufferSize = m_DmaChannel->AllocatedBufferSize();
+    m_CommonBufferSize = m_DmaChannel->BufferSize();
     m_CommonBuffer = m_DmaChannel->SystemAddress();
     m_Capture = Capture;
     // delay of 10 millisec