IWMReaderCallbackAdvanced::AllocateForStream

The AllocateForOutput method allocates buffers for stream samples delivered to IWMReaderCallbackAdvanced::OnStreamSample.

Syntax

HRESULT AllocateForStream(
  WORD  wStreamNum,
  DWORD  cbBuffer,
  INSSBuffer**  ppBuffer,
  void*  pvContext
);

Parameters

wStreamNum

[in] Word containing the stream number.

cbBuffer

[in] Count of bytes in the buffer.

ppBuffer

[out] If the method succeeds, returns a pointer to a pointer to an INSSBuffer object.

pvContext

[in] Universal pointer to the context. The context matches the context passed to IWMReader::Start.

Return Values

If the method succeeds, it returns S_OK. If it fails, it returns an HRESULT error code.

Remarks

Stream numbers may only be in the range of 1-64.

See Also