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#include "FLVCOM.h"
#include "AMFDispatch.h"
FLVCOM flvCOM;
extern bool mute;
static HANDLE DuplicateCurrentThread()
{
HANDLE fakeHandle = GetCurrentThread();
HANDLE copiedHandle = 0;
HANDLE processHandle = GetCurrentProcess();
DuplicateHandle(processHandle, fakeHandle, processHandle, &copiedHandle, 0, FALSE, DUPLICATE_SAME_ACCESS);
return copiedHandle;
}
enum
{
DISP_FLV_REGISTER_CALLBACK,
DISP_FLV_UNREGISTER_CALLBACK,
DISP_FLV_SETMUTE,
};
#define CHECK_ID(str, id) if (wcscmp(rgszNames[i], L##str) == 0) { rgdispid[i] = id; continue; }
HRESULT FLVCOM::GetIDsOfNames(REFIID riid, OLECHAR FAR* FAR* rgszNames, unsigned int cNames, LCID lcid, DISPID FAR* rgdispid)
{
bool unknowns = false;
for (unsigned int i = 0;i != cNames;i++)
{
CHECK_ID("RegisterCallback", DISP_FLV_REGISTER_CALLBACK)
CHECK_ID("UnregisterCallback", DISP_FLV_UNREGISTER_CALLBACK)
CHECK_ID("SetMute", DISP_FLV_SETMUTE)
rgdispid[i] = DISPID_UNKNOWN;
unknowns = true;
}
if (unknowns)
return DISP_E_UNKNOWNNAME;
else
return S_OK;
}
HRESULT FLVCOM::GetTypeInfo(unsigned int itinfo, LCID lcid, ITypeInfo FAR* FAR* pptinfo)
{
return E_NOTIMPL;
}
HRESULT FLVCOM::GetTypeInfoCount(unsigned int FAR * pctinfo)
{
return E_NOTIMPL;
}
HRESULT FLVCOM::Invoke(DISPID dispid, REFIID riid, LCID lcid, WORD wFlags, DISPPARAMS FAR *pdispparams, VARIANT FAR *pvarResult, EXCEPINFO FAR * pexecinfo, unsigned int FAR *puArgErr)
{
if (pvarResult)
VariantInit(pvarResult);
switch (dispid)
{
case DISP_FLV_SETMUTE:
{
if (pdispparams->rgvarg[0].boolVal)
mute = true;
else
mute = false;
}
return S_OK;
case DISP_FLV_REGISTER_CALLBACK:
{
IDispatch *callback = pdispparams->rgvarg[0].pdispVal;
callbacks.push_back(DispatchCallbackInfo(callback, GetCurrentThreadId(), DuplicateCurrentThread()));
return S_OK;
}
break;
case DISP_FLV_UNREGISTER_CALLBACK:
{
IDispatch *callback = pdispparams->rgvarg[0].pdispVal;
size_t numCallbacks = callbacks.size();
while (numCallbacks--)
{
if (callbacks[numCallbacks].dispatch == callback)
{
CloseHandle(callbacks[numCallbacks].threadHandle);
callbacks.erase(callbacks.begin() + numCallbacks);
}
}
return S_OK;
}
break;
}
return DISP_E_MEMBERNOTFOUND;
}
STDMETHODIMP FLVCOM::QueryInterface(REFIID riid, PVOID *ppvObject)
{
if (!ppvObject)
return E_POINTER;
else if (IsEqualIID(riid, IID_IDispatch))
*ppvObject = (IDispatch *)this;
else if (IsEqualIID(riid, IID_IUnknown))
*ppvObject = this;
else
{
*ppvObject = NULL;
return E_NOINTERFACE;
}
AddRef();
return S_OK;
}
ULONG FLVCOM::AddRef(void)
{
return 0;
}
ULONG FLVCOM::Release(void)
{
return 0;
}
static void CallDispatchMethod(IDispatch *dispatch, DISPPARAMS ¶ms, OLECHAR *name)
{
try
{
unsigned int ret;
DISPID dispid;
if (SUCCEEDED(dispatch->GetIDsOfNames(IID_NULL, &name, 1, LOCALE_SYSTEM_DEFAULT, &dispid)))
dispatch->Invoke(dispid, GUID_NULL, 0, DISPATCH_METHOD, ¶ms, 0, 0, &ret);
}
catch (...)
{}
}
struct APCdata
{
IDispatch *disp;
wchar_t *name;
AMFDispatch *amf;
};
static VOID CALLBACK MetadataAPC(ULONG_PTR param)
{
APCdata *data = (APCdata *)param;
DISPPARAMS params;
VARIANT argument;
params.cArgs = 1;
params.cNamedArgs = 0;
params.rgdispidNamedArgs = 0;
params.rgvarg = &argument;
VariantInit(&argument);
V_VT(&argument) = VT_DISPATCH;
V_DISPATCH(&argument) = data->amf;
CallDispatchMethod(data->disp, params, data->name);
data->disp->Release();
data->amf->Release();
free(data->name);
delete data;
}
void FLVCOM::MetadataCallback(FLVMetadata::Tag *tag)
{
if (!callbacks.empty())
{
AMFDispatch *disp = new AMFDispatch(tag->parameters); // we're newing this we can refcount
DWORD curThreadId = GetCurrentThreadId();
for (size_t i = 0;i != callbacks.size();i++)
{
APCdata *data = new APCdata;
data->disp = callbacks[i].dispatch;
data->disp->AddRef();
data->name = _wcsdup(tag->name.str);
data->amf = disp;
data->amf->AddRef();
if (curThreadId == callbacks[i].threadId)
MetadataAPC((ULONG_PTR)data);
else
{
if (callbacks[i].threadHandle)
QueueUserAPC(MetadataAPC, callbacks[i].threadHandle, (ULONG_PTR)data);
}
}
disp->Release();
}
}
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