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#include <stdio.h>
#include "allocator.h"
#include <com.h>
#define E_NOTIMPL 0x80004001
class AllocatorKeeper
{
public:
AllocatorKeeper()
{
RegisterComClass(&CLSID_MemoryAllocator, MemAllocator::CreateAllocator);
}
};
static AllocatorKeeper keeper;
GUID MemAllocator::interfaces[]=
{
IID_IUnknown,
IID_IMemAllocator,
};
IMPLEMENT_IUNKNOWN(MemAllocator)
MemAllocator::MemAllocator()
:refcount(1)
{
Debug printf("MemAllocator::MemAllocator() called\n");
vt=new IMemAllocator_vt;
vt->QueryInterface = QueryInterface;
vt->AddRef = AddRef;
vt->Release = Release;
vt->SetProperties = SetProperties;
vt->GetProperties = GetProperties;
vt->Commit = Commit;
vt->Decommit = Decommit;
vt->GetBuffer = GetBuffer;
vt->ReleaseBuffer = ReleaseBuffer;
props.cBuffers=1;
props.cbBuffer=65536;/* :/ */
props.cbAlign=props.cbPrefix=0;
}
long MemAllocator::CreateAllocator(GUID* clsid, GUID* iid, void** ppv)
{
if(!ppv)return -1;
*ppv=0;
if(memcmp(clsid, &CLSID_MemoryAllocator, sizeof(GUID)))
return -1;
IMemAllocator* p=new MemAllocator;
int result=p->vt->QueryInterface((IUnknown*)p, iid, ppv);
p->vt->Release((IUnknown*)p);
return result;
}
/*
long cBuffers;
long cbBuffer;
long cbAlign;
long cbPrefix;
*/
HRESULT STDCALL MemAllocator::SetProperties (
IMemAllocator * This,
/* [in] */ ALLOCATOR_PROPERTIES *pRequest,
/* [out] */ ALLOCATOR_PROPERTIES *pActual)
{
Debug printf("MemAllocator::SetProperties() called\n");
if(!pRequest)return 0x80004003;
if(!pActual)return 0x80004003;
if(pRequest->cBuffers<=0)return -1;
if(pRequest->cbBuffer<=0)return -1;
MemAllocator* me=(MemAllocator*)This;
if(me->used_list.size() || me->free_list.size())return -1;
me->props=*pRequest;
*pActual=*pRequest;
return 0;
}
HRESULT STDCALL MemAllocator::GetProperties (
IMemAllocator * This,
/* [out] */ ALLOCATOR_PROPERTIES *pProps)
{
Debug printf("MemAllocator::GetProperties() called\n");
if(!pProps)return -1;
if(((MemAllocator*)This)->props.cbBuffer<0)return -1;
*pProps=((MemAllocator*)This)->props;
return 0;
}
HRESULT STDCALL MemAllocator::Commit (
IMemAllocator * This)
{
Debug printf("MemAllocator::Commit() called\n");
MemAllocator* me=(MemAllocator*)This;
if(((MemAllocator*)This)->props.cbBuffer<0)return -1;
if(me->used_list.size() || me->free_list.size())return -1;
for(int i=0; i<me->props.cBuffers; i++)
me->free_list.push_back(new CMediaSample(me, me->props.cbBuffer));
return 0;
}
HRESULT STDCALL MemAllocator::Decommit (
IMemAllocator * This)
{
Debug printf("MemAllocator::Decommit() called\n");
MemAllocator* me=(MemAllocator*)This;
list<CMediaSample*>::iterator it;
for(it=me->free_list.begin(); it!=me->free_list.end(); it++)
delete *it;
for(it=me->used_list.begin(); it!=me->used_list.end(); it++)
delete *it;
me->free_list.clear();
me->used_list.clear();
return 0;
}
HRESULT STDCALL MemAllocator::GetBuffer (
IMemAllocator * This,
/* [out] */ IMediaSample **ppBuffer,
/* [in] */ REFERENCE_TIME *pStartTime,
/* [in] */ REFERENCE_TIME *pEndTime,
/* [in] */ DWORD dwFlags)
{
Debug printf("%x: MemAllocator::GetBuffer() called\n", This);
MemAllocator* me=(MemAllocator*)This;
if(me->free_list.size()==0)
{
Debug printf("No samples available\n");
return -1;//should block here if no samples are available
}
list<CMediaSample*>::iterator it=me->free_list.begin();
me->used_list.push_back(*it);
*ppBuffer=*it;
(*ppBuffer)->vt->AddRef((IUnknown*)*ppBuffer);
me->free_list.remove(*it);
return 0;
}
HRESULT STDCALL MemAllocator::ReleaseBuffer (
IMemAllocator * This,
/* [in] */ IMediaSample *pBuffer)
{
Debug printf("%x: MemAllocator::ReleaseBuffer() called\n", This);
MemAllocator* me=(MemAllocator*)This;
list<CMediaSample*>::iterator it;
for(it=me->used_list.begin(); it!=me->used_list.end(); it++)
if(*it==pBuffer)
{
me->used_list.erase(it);
me->free_list.push_back((CMediaSample*)pBuffer);
return 0;
}
Debug printf("Releasing unknown buffer\n");
return -1;
}
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