From fbe693a169b346b4b4e48ee39017cf86b594429b Mon Sep 17 00:00:00 2001
From: arpi_esp <arpi_esp@b3059339-0415-0410-9bf9-f77b7e298cf2>
Date: Tue, 20 Mar 2001 00:05:27 +0000
Subject: Initial revision

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@169 b3059339-0415-0410-9bf9-f77b7e298cf2
---
 loader/dshow/allocator.c | 154 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 154 insertions(+)
 create mode 100644 loader/dshow/allocator.c

(limited to 'loader/dshow/allocator.c')

diff --git a/loader/dshow/allocator.c b/loader/dshow/allocator.c
new file mode 100644
index 0000000000..496d56c66f
--- /dev/null
+++ b/loader/dshow/allocator.c
@@ -0,0 +1,154 @@
+#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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