[AVIFIL32] question about ACMStream_fn[AddRef|Release] in acmstream.c

[Paul Vriens]

Hi,

during my code cleanup I came to acmstream.c and found the following:

static ULONG WINAPI ACMStream_fnAddRef(IAVIStream *iface)
{
  IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
                                                                                                         
  TRACE("(%p) -> %ld\n", iface, This->ref + 1);
                                                                                                         
  /* also add reference to the nested stream */
  if (This->pStream != NULL)
    IAVIStream_AddRef(This->pStream);
                                                                                                         
  return ++(This->ref);
}

the AddRef can be cleaned up.
                             
the Release however looks buggy:
 
static ULONG WINAPI ACMStream_fnRelease(IAVIStream* iface)
{
  IAVIStreamImpl *This = (IAVIStreamImpl *)iface;
                                                                                                         
  TRACE("(%p) -> %ld\n", iface, This->ref - 1);
                                                                                                         
  if (This->ref == 0) {
    /* destruct */


This means I have to do a Release twice before it actually goes into the
if statement, because the decrementing takes place at the end of the
Release function.

Can anybody confirm my finding.

Cheers,

Paul.