On Tue, 30 May 2000, Ed Patriquin wrote:
>
> Let's sync up.
>
> Goal: Provide an arbitrary byte stream to the IWMReader object in the
> Windows Media Format SDK.
>
> Here is the psuedocode for what I am trying to do:
>
> I never get the chance to serve up any data to anyone as the Accept in the
> server thread never returns in this scenario. Does this make things a
> little clearer.
A little...
I can't look at it in depth tonight, but here's a snippet of code from
my stuff. It's unlikely that this will solve your problem, but it's all I
have time to do *right now*. I'll try to dive in later. This is all from
the windows media side of things, not the socket side of things.
ECS(data->port_cs);
sprintf(szUrl,"http://127.0.0.1:%i/%i",*data->port,key);
LCS(data->port_cs);
MultiByteToWideChar(CP_ACP,0,szUrl,-1,wsUrl,256);
// create the WMA reader
hr = WMCreateReader(NULL, 0, &comReader);
if (hr!=S_OK) {ODS("Could not get a reader\n");}
// open the reader, with cNoise->OnSample as the callback
ResetEvent(data->hWait);
hr = data->noise->QueryInterface(IID_IWMReaderCallback, (void **)
&comCallback);
if (hr!=S_OK) {ODS("cNoise couldn't be a callback\n");}
if (hr == E_NOINTERFACE)
{ODS("No Interface? (hmmm....)\n");}
if (hr == REGDB_E_CLASSNOTREG)
{ODS("Class not registered. (oh fuck)\n");}
if (hr == CLASS_E_NOAGGREGATION)
{ODS("Class can not be aggregated. (huh?)\n");}
hr = comReader->Open(wsUrl, comCallback, 0);
if (hr!=S_OK) {ODS("Could not open the reader\n");}
WaitForSingleObject(data->hWait, INFINITE);
data->hWait gets set by the object data->noise, which implements the
callback, which is called by the system during opening:
STDMETHODIMP CSound::OnStatus(
/* [in] */ WMT_STATUS Status,
/* [in] */ HRESULT hr,
/* [in] */ WMT_ATTR_DATATYPE dwType,
/* [in] */ BYTE __RPC_FAR *pValue,
/* [in] */ void __RPC_FAR *pvContext)
{
// ODS("OnStatus\n");
switch (Status) {
case WMT_OPENED: ODS("OnStatus(WMT_OPENED)\n");
HANDLE hWait;
hWait =
OpenEvent(EVENT_MODIFY_STATE,FALSE,"windowsmedia_open");
SetEvent(hWait);
break;
there are a bunch of other cases that you should consider processing,
and a similar function:
STDMETHODIMP CSound::OnSample(
/* [in] */ DWORD dwOutputNum,
/* [in] */ QWORD cnsSampleTime,
/* [in] */ QWORD cnsSampleDuration,
/* [in] */ DWORD dwFlags,
/* [in] */ INSSBuffer __RPC_FAR *pSample,
/* [in] */ void __RPC_FAR *pvContext)
{
// ODS("OnSample\n");
// ODS("on sample\n");
struct sound *s;
s = (struct sound *)CoTaskMemAlloc(sizeof(struct sound));
unsigned char *in;
pSample->GetBufferAndLength(&in,&(s->size));
which is called for each sample.
If this helps at all, tell me. If it doesn't help at all, tell me that
too. Oh, ODS is a macro for outputdebugstring, and ECS/LCS are enter
critical section and leave critical section. Neither have any real effect
on the code, at least not the part you're trying to understand.
_______________________________________________
[EMAIL PROTECTED]
http://www.freeamp.org/mailman/listinfo/freeamp-dev
