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wine/dlls/qedit/samplegrabber.c
Paul Chitescu 2d5ea4b5d5 qedit: Add media type enumerator to SampleGrabber.
2010-02-15 12:09:42 +01:00

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/* DirectShow Sample Grabber object (QEDIT.DLL)
*
* Copyright 2009 Paul Chitescu
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <assert.h>
#include <stdarg.h>
#define COBJMACROS
#include "windef.h"
#include "winbase.h"
#include "winuser.h"
#include "ole2.h"
#include "qedit_private.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(qedit);
static WCHAR const vendor_name[] = { 'W', 'i', 'n', 'e', 0 };
static WCHAR const pin_in_name[] = { 'I', 'n', 0 };
static WCHAR const pin_out_name[] = { 'O', 'u', 't', 0 };
IEnumPins *pinsenum_create(IBaseFilter *filter, IPin **pins, ULONG pinCount);
IEnumMediaTypes *mediaenum_create(AM_MEDIA_TYPE *mtype);
/* Fixed pins enumerator, holds filter referenced */
typedef struct _PE_Impl {
IEnumPins pe;
IBaseFilter *filter;
LONG refCount;
ULONG numPins;
ULONG index;
IPin *pins[0];
} PE_Impl;
/* IEnumPins interface implementation */
/* IUnknown */
static ULONG WINAPI
Fixed_IEnumPins_AddRef(IEnumPins *iface)
{
PE_Impl *This = (PE_Impl *)iface;
ULONG refCount = InterlockedIncrement(&This->refCount);
TRACE("(%p) new ref = %u\n", This, refCount);
return refCount;
}
/* IUnknown */
static ULONG WINAPI
Fixed_IEnumPins_Release(IEnumPins *iface)
{
PE_Impl *This = (PE_Impl *)iface;
ULONG refCount = InterlockedDecrement(&This->refCount);
TRACE("(%p) new ref = %u\n", This, refCount);
if (refCount == 0)
{
IBaseFilter_Release(This->filter);
CoTaskMemFree(This);
return 0;
}
return refCount;
}
/* IUnknown */
static HRESULT WINAPI
Fixed_IEnumPins_QueryInterface(IEnumPins *iface, REFIID riid, void **ppvObject)
{
PE_Impl *This = (PE_Impl *)iface;
TRACE("(%p)->(%s %p)\n", This, debugstr_guid(riid), ppvObject);
if (IsEqualIID(riid, &IID_IUnknown) ||
IsEqualIID(riid, &IID_IEnumPins)) {
Fixed_IEnumPins_AddRef(iface);
*ppvObject = &(This->pins);
return S_OK;
}
*ppvObject = NULL;
WARN("(%p, %s,%p): not found\n", This, debugstr_guid(riid), ppvObject);
return E_NOINTERFACE;
}
/* IEnumPins */
static HRESULT WINAPI
Fixed_IEnumPins_Next(IEnumPins *iface, ULONG nPins, IPin **pins, ULONG *fetched)
{
PE_Impl *This = (PE_Impl *)iface;
ULONG count = 0;
TRACE("(%p)->(%u, %p, %p) index = %u\n", This, nPins, pins, fetched, This->index);
if (!nPins)
return E_INVALIDARG;
if (!pins || ((nPins != 1) && !fetched))
return E_POINTER;
while ((count < nPins) && (This->index < This->numPins)) {
IPin *pin = This->pins[This->index++];
IPin_AddRef(pin);
pins[count++] = pin;
}
if (fetched)
*fetched = count;
return (count == nPins) ? S_OK : S_FALSE;
}
/* IEnumPins */
static HRESULT WINAPI
Fixed_IEnumPins_Skip(IEnumPins *iface, ULONG nPins)
{
PE_Impl *This = (PE_Impl *)iface;
TRACE("(%p)->(%u) index = %u\n", This, nPins, This->index);
nPins += This->index;
if (nPins >= This->numPins) {
This->index = This->numPins;
return S_FALSE;
}
This->index = nPins;
return S_OK;
}
/* IEnumPins */
static HRESULT WINAPI
Fixed_IEnumPins_Reset(IEnumPins *iface)
{
PE_Impl *This = (PE_Impl *)iface;
TRACE("(%p)->() index = %u\n", This, This->index);
This->index = 0;
return S_OK;
}
/* IEnumPins */
static HRESULT WINAPI
Fixed_IEnumPins_Clone(IEnumPins *iface, IEnumPins **pins)
{
PE_Impl *This = (PE_Impl *)iface;
TRACE("(%p)->(%p) index = %u\n", This, pins, This->index);
if (!pins)
return E_POINTER;
*pins = pinsenum_create(This->filter, This->pins, This->numPins);
if (!*pins)
return E_OUTOFMEMORY;
((PE_Impl *)*pins)->index = This->index;
return S_OK;
}
/* Virtual tables and constructor */
static const IEnumPinsVtbl IEnumPins_VTable =
{
Fixed_IEnumPins_QueryInterface,
Fixed_IEnumPins_AddRef,
Fixed_IEnumPins_Release,
Fixed_IEnumPins_Next,
Fixed_IEnumPins_Skip,
Fixed_IEnumPins_Reset,
Fixed_IEnumPins_Clone,
};
IEnumPins *pinsenum_create(IBaseFilter *filter, IPin **pins, ULONG pinCount)
{
ULONG len = sizeof(PE_Impl) + (pinCount * sizeof(IPin *));
PE_Impl *obj = CoTaskMemAlloc(len);
if (obj) {
ULONG i;
ZeroMemory(obj, len);
obj->pe.lpVtbl = &IEnumPins_VTable;
obj->refCount = 1;
obj->filter = filter;
obj->numPins = pinCount;
obj->index = 0;
for (i=0; i<pinCount; i++)
obj->pins[i] = pins[i];
IBaseFilter_AddRef(filter);
}
return &obj->pe;
}
/* Single media type enumerator */
typedef struct _ME_Impl {
IEnumMediaTypes me;
LONG refCount;
BOOL past;
AM_MEDIA_TYPE mtype;
} ME_Impl;
/* IEnumMediaTypes interface implementation */
/* IUnknown */
static ULONG WINAPI
Single_IEnumMediaTypes_AddRef(IEnumMediaTypes *iface)
{
ME_Impl *This = (ME_Impl *)iface;
ULONG refCount = InterlockedIncrement(&This->refCount);
TRACE("(%p) new ref = %u\n", This, refCount);
return refCount;
}
/* IUnknown */
static ULONG WINAPI
Single_IEnumMediaTypes_Release(IEnumMediaTypes *iface)
{
ME_Impl *This = (ME_Impl *)iface;
ULONG refCount = InterlockedDecrement(&This->refCount);
TRACE("(%p) new ref = %u\n", This, refCount);
if (refCount == 0)
{
if (This->mtype.pbFormat)
CoTaskMemFree(This->mtype.pbFormat);
CoTaskMemFree(This);
return 0;
}
return refCount;
}
/* IUnknown */
static HRESULT WINAPI
Single_IEnumMediaTypes_QueryInterface(IEnumMediaTypes *iface, REFIID riid, void **ppvObject)
{
ME_Impl *This = (ME_Impl *)iface;
TRACE("(%p)->(%s %p)\n", This, debugstr_guid(riid), ppvObject);
if (IsEqualIID(riid, &IID_IUnknown) ||
IsEqualIID(riid, &IID_IEnumMediaTypes)) {
Single_IEnumMediaTypes_AddRef(iface);
*ppvObject = &(This->me);
return S_OK;
}
*ppvObject = NULL;
WARN("(%p, %s,%p): not found\n", This, debugstr_guid(riid), ppvObject);
return E_NOINTERFACE;
}
/* IEnumMediaTypes */
static HRESULT WINAPI
Single_IEnumMediaTypes_Next(IEnumMediaTypes *iface, ULONG nTypes, AM_MEDIA_TYPE **types, ULONG *fetched)
{
ME_Impl *This = (ME_Impl *)iface;
ULONG count = 0;
TRACE("(%p)->(%u, %p, %p)\n", This, nTypes, types, fetched);
if (!nTypes)
return E_INVALIDARG;
if (!types || ((nTypes != 1) && !fetched))
return E_POINTER;
if (!This->past) {
AM_MEDIA_TYPE *mtype = CoTaskMemAlloc(sizeof(AM_MEDIA_TYPE));
*mtype = This->mtype;
if (mtype->cbFormat) {
mtype->pbFormat = CoTaskMemAlloc(mtype->cbFormat);
CopyMemory(mtype->pbFormat, This->mtype.pbFormat, mtype->cbFormat);
}
*types = mtype;
This->past = TRUE;
count = 1;
}
if (fetched)
*fetched = count;
return (count == nTypes) ? S_OK : S_FALSE;
}
/* IEnumMediaTypes */
static HRESULT WINAPI
Single_IEnumMediaTypes_Skip(IEnumMediaTypes *iface, ULONG nTypes)
{
ME_Impl *This = (ME_Impl *)iface;
TRACE("(%p)->(%u)\n", This, nTypes);
if (nTypes)
This->past = TRUE;
return This->past ? S_FALSE : S_OK;
}
/* IEnumMediaTypes */
static HRESULT WINAPI
Single_IEnumMediaTypes_Reset(IEnumMediaTypes *iface)
{
ME_Impl *This = (ME_Impl *)iface;
TRACE("(%p)->()\n", This);
This->past = FALSE;
return S_OK;
}
/* IEnumMediaTypes */
static HRESULT WINAPI
Single_IEnumMediaTypes_Clone(IEnumMediaTypes *iface, IEnumMediaTypes **me)
{
ME_Impl *This = (ME_Impl *)iface;
TRACE("(%p)->(%p)\n", This, me);
if (!me)
return E_POINTER;
*me = mediaenum_create(&This->mtype);
if (!*me)
return E_OUTOFMEMORY;
((ME_Impl *)*me)->past = This->past;
return S_OK;
}
/* Virtual tables and constructor */
static const IEnumMediaTypesVtbl IEnumMediaTypes_VTable =
{
Single_IEnumMediaTypes_QueryInterface,
Single_IEnumMediaTypes_AddRef,
Single_IEnumMediaTypes_Release,
Single_IEnumMediaTypes_Next,
Single_IEnumMediaTypes_Skip,
Single_IEnumMediaTypes_Reset,
Single_IEnumMediaTypes_Clone,
};
IEnumMediaTypes *mediaenum_create(AM_MEDIA_TYPE *mtype)
{
ME_Impl *obj = CoTaskMemAlloc(sizeof(ME_Impl));
if (obj) {
ZeroMemory(obj, sizeof(ME_Impl));
obj->me.lpVtbl = &IEnumMediaTypes_VTable;
obj->refCount = 1;
obj->past = FALSE;
obj->mtype = *mtype;
obj->mtype.pUnk = NULL;
if (mtype->cbFormat) {
obj->mtype.pbFormat = CoTaskMemAlloc(mtype->cbFormat);
CopyMemory(obj->mtype.pbFormat, mtype->pbFormat, mtype->cbFormat);
}
else
obj->mtype.pbFormat = NULL;
}
return &obj->me;
}
/* Sample Grabber pin implementation */
typedef struct _SG_Pin {
const IPinVtbl* lpVtbl;
PIN_DIRECTION dir;
WCHAR const *name;
struct _SG_Impl *sg;
IPin *pair;
} SG_Pin;
/* Sample Grabber filter implementation */
typedef struct _SG_Impl {
const IBaseFilterVtbl* IBaseFilter_Vtbl;
const ISampleGrabberVtbl* ISampleGrabber_Vtbl;
const IMemInputPinVtbl* IMemInputPin_Vtbl;
/* TODO: IMediaPosition, IMediaSeeking, IQualityControl */
LONG refCount;
FILTER_INFO info;
FILTER_STATE state;
AM_MEDIA_TYPE mtype;
SG_Pin pin_in;
SG_Pin pin_out;
IMemAllocator *allocator;
IReferenceClock *refClock;
IMemInputPin *memOutput;
ISampleGrabberCB *grabberIface;
LONG grabberMethod;
LONG oneShot;
} SG_Impl;
enum {
OneShot_None,
OneShot_Wait,
OneShot_Past,
};
/* Get the SampleGrabber implementation This pointer from various interface pointers */
static inline SG_Impl *impl_from_IBaseFilter(IBaseFilter *iface)
{
return (SG_Impl *)((char*)iface - FIELD_OFFSET(SG_Impl, IBaseFilter_Vtbl));
}
static inline SG_Impl *impl_from_ISampleGrabber(ISampleGrabber *iface)
{
return (SG_Impl *)((char*)iface - FIELD_OFFSET(SG_Impl, ISampleGrabber_Vtbl));
}
static inline SG_Impl *impl_from_IMemInputPin(IMemInputPin *iface)
{
return (SG_Impl *)((char*)iface - FIELD_OFFSET(SG_Impl, IMemInputPin_Vtbl));
}
/* Cleanup at end of life */
static void SampleGrabber_cleanup(SG_Impl *This)
{
TRACE("(%p)\n", This);
if (This->info.pGraph)
WARN("(%p) still joined to filter graph %p\n", This, This->info.pGraph);
if (This->allocator)
IMemAllocator_Release(This->allocator);
if (This->refClock)
IReferenceClock_Release(This->refClock);
if (This->memOutput)
IMemInputPin_Release(This->memOutput);
if (This->grabberIface)
ISampleGrabberCB_Release(This->grabberIface);
if (This->mtype.pbFormat)
CoTaskMemFree(This->mtype.pbFormat);
}
/* Common helper AddRef called from all interfaces */
static ULONG SampleGrabber_addref(SG_Impl *This)
{
ULONG refCount = InterlockedIncrement(&This->refCount);
TRACE("(%p) new ref = %u\n", This, refCount);
return refCount;
}
/* Common helper Release called from all interfaces */
static ULONG SampleGrabber_release(SG_Impl *This)
{
ULONG refCount = InterlockedDecrement(&This->refCount);
TRACE("(%p) new ref = %u\n", This, refCount);
if (refCount == 0)
{
SampleGrabber_cleanup(This);
CoTaskMemFree(This);
return 0;
}
return refCount;
}
/* Common helper QueryInterface called from all interfaces */
static HRESULT SampleGrabber_query(SG_Impl *This, REFIID riid, void **ppvObject)
{
TRACE("(%p)->(%s %p)\n", This, debugstr_guid(riid), ppvObject);
if (IsEqualIID(riid, &IID_IUnknown) ||
IsEqualIID(riid, &IID_IPersist) ||
IsEqualIID(riid, &IID_IMediaFilter) ||
IsEqualIID(riid, &IID_IBaseFilter)) {
SampleGrabber_addref(This);
*ppvObject = &(This->IBaseFilter_Vtbl);
return S_OK;
}
else if (IsEqualIID(riid, &IID_ISampleGrabber)) {
SampleGrabber_addref(This);
*ppvObject = &(This->ISampleGrabber_Vtbl);
return S_OK;
}
else if (IsEqualIID(riid, &IID_IMemInputPin)) {
SampleGrabber_addref(This);
*ppvObject = &(This->IMemInputPin_Vtbl);
return S_OK;
}
else if (IsEqualIID(riid, &IID_IMediaPosition))
FIXME("IMediaPosition not implemented\n");
else if (IsEqualIID(riid, &IID_IMediaSeeking))
FIXME("IMediaSeeking not implemented\n");
else if (IsEqualIID(riid, &IID_IQualityControl))
FIXME("IQualityControl not implemented\n");
*ppvObject = NULL;
WARN("(%p, %s,%p): not found\n", This, debugstr_guid(riid), ppvObject);
return E_NOINTERFACE;
}
/* Helper that calls installed sample callbacks */
static void SampleGrabber_callback(SG_Impl *This, IMediaSample *sample)
{
double time = 0.0;
REFERENCE_TIME tStart, tEnd;
if (SUCCEEDED(IMediaSample_GetTime(sample, &tStart, &tEnd)))
time = 1e-7 * tStart;
switch (This->grabberMethod) {
case 0:
{
ULONG ref = IMediaSample_AddRef(sample);
ISampleGrabberCB_SampleCB(This->grabberIface, time, sample);
ref = IMediaSample_Release(sample) + 1 - ref;
if (ref)
{
ERR("(%p) Callback referenced sample %p by %u\n", This, sample, ref);
/* ugly as hell but some apps are sooo buggy */
while (ref--)
IMediaSample_Release(sample);
}
}
break;
case 1:
{
BYTE *data = 0;
long size = IMediaSample_GetActualDataLength(sample);
if (size && SUCCEEDED(IMediaSample_GetPointer(sample, &data)) && data)
ISampleGrabberCB_BufferCB(This->grabberIface, time, data, size);
}
break;
case -1:
break;
default:
FIXME("unsupported method %ld\n", (long int)This->grabberMethod);
/* do not bother us again */
This->grabberMethod = -1;
}
}
/* SampleGrabber implementation of IBaseFilter interface */
/* IUnknown */
static HRESULT WINAPI
SampleGrabber_IBaseFilter_QueryInterface(IBaseFilter *iface, REFIID riid, void **ppvObject)
{
return SampleGrabber_query(impl_from_IBaseFilter(iface), riid, ppvObject);
}
/* IUnknown */
static ULONG WINAPI
SampleGrabber_IBaseFilter_AddRef(IBaseFilter *iface)
{
return SampleGrabber_addref(impl_from_IBaseFilter(iface));
}
/* IUnknown */
static ULONG WINAPI
SampleGrabber_IBaseFilter_Release(IBaseFilter *iface)
{
return SampleGrabber_release(impl_from_IBaseFilter(iface));
}
/* IPersist */
static HRESULT WINAPI
SampleGrabber_IBaseFilter_GetClassID(IBaseFilter *iface, CLSID *pClassID)
{
TRACE("(%p)\n", pClassID);
if (!pClassID)
return E_POINTER;
*pClassID = CLSID_SampleGrabber;
return S_OK;
}
/* IMediaFilter */
static HRESULT WINAPI
SampleGrabber_IBaseFilter_Stop(IBaseFilter *iface)
{
SG_Impl *This = impl_from_IBaseFilter(iface);
TRACE("(%p)\n", This);
This->state = State_Stopped;
return S_OK;
}
/* IMediaFilter */
static HRESULT WINAPI
SampleGrabber_IBaseFilter_Pause(IBaseFilter *iface)
{
SG_Impl *This = impl_from_IBaseFilter(iface);
TRACE("(%p)\n", This);
This->state = State_Paused;
return S_OK;
}
/* IMediaFilter */
static HRESULT WINAPI
SampleGrabber_IBaseFilter_Run(IBaseFilter *iface, REFERENCE_TIME tStart)
{
SG_Impl *This = impl_from_IBaseFilter(iface);
TRACE("(%p)\n", This);
This->state = State_Running;
return S_OK;
}
/* IMediaFilter */
static HRESULT WINAPI
SampleGrabber_IBaseFilter_GetState(IBaseFilter *iface, DWORD msTout, FILTER_STATE *state)
{
SG_Impl *This = impl_from_IBaseFilter(iface);
TRACE("(%p)->(%u, %p)\n", This, msTout, state);
if (!state)
return E_POINTER;
*state = This->state;
return S_OK;
}
/* IMediaFilter */
static HRESULT WINAPI
SampleGrabber_IBaseFilter_SetSyncSource(IBaseFilter *iface, IReferenceClock *clock)
{
SG_Impl *This = impl_from_IBaseFilter(iface);
TRACE("(%p)->(%p)\n", This, clock);
if (clock != This->refClock)
{
if (clock)
IReferenceClock_AddRef(clock);
if (This->refClock)
IReferenceClock_Release(This->refClock);
This->refClock = clock;
}
return S_OK;
}
/* IMediaFilter */
static HRESULT WINAPI
SampleGrabber_IBaseFilter_GetSyncSource(IBaseFilter *iface, IReferenceClock **clock)
{
SG_Impl *This = impl_from_IBaseFilter(iface);
TRACE("(%p)->(%p)\n", This, clock);
if (!clock)
return E_POINTER;
if (This->refClock)
IReferenceClock_AddRef(This->refClock);
*clock = This->refClock;
return S_OK;
}
/* IBaseFilter */
static HRESULT WINAPI
SampleGrabber_IBaseFilter_EnumPins(IBaseFilter *iface, IEnumPins **pins)
{
SG_Impl *This = impl_from_IBaseFilter(iface);
IPin *pin[2];
TRACE("(%p)->(%p)\n", This, pins);
if (!pins)
return E_POINTER;
pin[0] = (IPin*)&This->pin_in.lpVtbl;
pin[1] = (IPin*)&This->pin_out.lpVtbl;
*pins = pinsenum_create(iface, pin, 2);
return *pins ? S_OK : E_OUTOFMEMORY;
}
/* IBaseFilter */
static HRESULT WINAPI
SampleGrabber_IBaseFilter_FindPin(IBaseFilter *iface, LPCWSTR id, IPin **pin)
{
SG_Impl *This = impl_from_IBaseFilter(iface);
TRACE("(%p)->(%s, %p)\n", This, debugstr_w(id), pin);
if (!id || !pin)
return E_POINTER;
if (!lstrcmpiW(id,pin_in_name))
{
SampleGrabber_addref(This);
*pin = (IPin*)&(This->pin_in.lpVtbl);
return S_OK;
}
else if (!lstrcmpiW(id,pin_out_name))
{
SampleGrabber_addref(This);
*pin = (IPin*)&(This->pin_out.lpVtbl);
return S_OK;
}
*pin = NULL;
return VFW_E_NOT_FOUND;
}
/* IBaseFilter */
static HRESULT WINAPI
SampleGrabber_IBaseFilter_QueryFilterInfo(IBaseFilter *iface, FILTER_INFO *info)
{
SG_Impl *This = impl_from_IBaseFilter(iface);
TRACE("(%p)->(%p)\n", This, info);
if (!info)
return E_POINTER;
if (This->info.pGraph)
IFilterGraph_AddRef(This->info.pGraph);
*info = This->info;
return S_OK;
}
/* IBaseFilter */
static HRESULT WINAPI
SampleGrabber_IBaseFilter_JoinFilterGraph(IBaseFilter *iface, IFilterGraph *graph, LPCWSTR name)
{
SG_Impl *This = impl_from_IBaseFilter(iface);
TRACE("(%p)->(%p, %s)\n", This, graph, debugstr_w(name));
This->info.pGraph = graph;
if (name)
lstrcpynW(This->info.achName,name,MAX_FILTER_NAME);
This->oneShot = OneShot_None;
return S_OK;
}
/* IBaseFilter */
static HRESULT WINAPI
SampleGrabber_IBaseFilter_QueryVendorInfo(IBaseFilter *iface, LPWSTR *vendor)
{
TRACE("(%p)\n", vendor);
if (!vendor)
return E_POINTER;
*vendor = CoTaskMemAlloc(sizeof(vendor_name));
CopyMemory(*vendor, vendor_name, sizeof(vendor_name));
return S_OK;
}
/* SampleGrabber implementation of ISampleGrabber interface */
/* IUnknown */
static HRESULT WINAPI
SampleGrabber_ISampleGrabber_QueryInterface(ISampleGrabber *iface, REFIID riid, void **ppvObject)
{
return SampleGrabber_query(impl_from_ISampleGrabber(iface), riid, ppvObject);
}
/* IUnknown */
static ULONG WINAPI
SampleGrabber_ISampleGrabber_AddRef(ISampleGrabber *iface)
{
return SampleGrabber_addref(impl_from_ISampleGrabber(iface));
}
/* IUnknown */
static ULONG WINAPI
SampleGrabber_ISampleGrabber_Release(ISampleGrabber *iface)
{
return SampleGrabber_release(impl_from_ISampleGrabber(iface));
}
/* ISampleGrabber */
static HRESULT WINAPI
SampleGrabber_ISampleGrabber_SetOneShot(ISampleGrabber *iface, BOOL oneShot)
{
SG_Impl *This = impl_from_ISampleGrabber(iface);
TRACE("(%p)->(%u)\n", This, oneShot);
This->oneShot = oneShot ? OneShot_Wait : OneShot_None;
return S_OK;
}
/* ISampleGrabber */
static HRESULT WINAPI
SampleGrabber_ISampleGrabber_SetMediaType(ISampleGrabber *iface, const AM_MEDIA_TYPE *type)
{
SG_Impl *This = impl_from_ISampleGrabber(iface);
TRACE("(%p)->(%p)\n", This, type);
if (!type)
return E_POINTER;
TRACE("Media type: %s/%s ssize: %u format: %s (%u bytes)\n",
debugstr_guid(&type->majortype), debugstr_guid(&type->subtype),
type->lSampleSize,
debugstr_guid(&type->formattype), type->cbFormat);
if (This->mtype.pbFormat)
CoTaskMemFree(This->mtype.pbFormat);
This->mtype = *type;
This->mtype.pUnk = NULL;
if (type->cbFormat) {
This->mtype.pbFormat = CoTaskMemAlloc(type->cbFormat);
CopyMemory(This->mtype.pbFormat, type->pbFormat, type->cbFormat);
}
else
This->mtype.pbFormat = NULL;
return S_OK;
}
/* ISampleGrabber */
static HRESULT WINAPI
SampleGrabber_ISampleGrabber_GetConnectedMediaType(ISampleGrabber *iface, AM_MEDIA_TYPE *type)
{
SG_Impl *This = impl_from_ISampleGrabber(iface);
TRACE("(%p)->(%p)\n", This, type);
if (!type)
return E_POINTER;
if (!This->pin_in.pair)
return VFW_E_NOT_CONNECTED;
*type = This->mtype;
if (type->cbFormat) {
type->pbFormat = CoTaskMemAlloc(type->cbFormat);
CopyMemory(type->pbFormat, This->mtype.pbFormat, type->cbFormat);
}
return S_OK;
}
/* ISampleGrabber */
static HRESULT WINAPI
SampleGrabber_ISampleGrabber_SetBufferSamples(ISampleGrabber *iface, BOOL bufferEm)
{
TRACE("(%u)\n", bufferEm);
if (bufferEm) {
FIXME("buffering not implemented\n");
return E_NOTIMPL;
}
return S_OK;
}
/* ISampleGrabber */
static HRESULT WINAPI
SampleGrabber_ISampleGrabber_GetCurrentBuffer(ISampleGrabber *iface, LONG *bufSize, LONG *buffer)
{
FIXME("(%p, %p): stub\n", bufSize, buffer);
if (!bufSize)
return E_POINTER;
return E_INVALIDARG;
}
/* ISampleGrabber */
static HRESULT WINAPI
SampleGrabber_ISampleGrabber_GetCurrentSample(ISampleGrabber *iface, IMediaSample **sample)
{
/* MS doesn't implement it either, noone should call it */
WARN("(%p): not implemented\n", sample);
return E_NOTIMPL;
}
/* ISampleGrabber */
static HRESULT WINAPI
SampleGrabber_ISampleGrabber_SetCallback(ISampleGrabber *iface, ISampleGrabberCB *cb, LONG whichMethod)
{
SG_Impl *This = impl_from_ISampleGrabber(iface);
TRACE("(%p)->(%p, %u)\n", This, cb, whichMethod);
if (This->grabberIface)
ISampleGrabberCB_Release(This->grabberIface);
This->grabberIface = cb;
This->grabberMethod = whichMethod;
if (cb)
ISampleGrabberCB_AddRef(cb);
return S_OK;
}
/* SampleGrabber implementation of IMemInputPin interface */
/* IUnknown */
static HRESULT WINAPI
SampleGrabber_IMemInputPin_QueryInterface(IMemInputPin *iface, REFIID riid, void **ppvObject)
{
return SampleGrabber_query(impl_from_IMemInputPin(iface), riid, ppvObject);
}
/* IUnknown */
static ULONG WINAPI
SampleGrabber_IMemInputPin_AddRef(IMemInputPin *iface)
{
return SampleGrabber_addref(impl_from_IMemInputPin(iface));
}
/* IUnknown */
static ULONG WINAPI
SampleGrabber_IMemInputPin_Release(IMemInputPin *iface)
{
return SampleGrabber_release(impl_from_IMemInputPin(iface));
}
/* IMemInputPin */
static HRESULT WINAPI
SampleGrabber_IMemInputPin_GetAllocator(IMemInputPin *iface, IMemAllocator **allocator)
{
SG_Impl *This = impl_from_IMemInputPin(iface);
TRACE("(%p)->(%p) allocator = %p\n", This, allocator, This->allocator);
if (!allocator)
return E_POINTER;
*allocator = This->allocator;
if (!*allocator)
return VFW_E_NO_ALLOCATOR;
IMemAllocator_AddRef(*allocator);
return S_OK;
}
/* IMemInputPin */
static HRESULT WINAPI
SampleGrabber_IMemInputPin_NotifyAllocator(IMemInputPin *iface, IMemAllocator *allocator, BOOL readOnly)
{
SG_Impl *This = impl_from_IMemInputPin(iface);
TRACE("(%p)->(%p, %u) allocator = %p\n", This, allocator, readOnly, This->allocator);
if (This->allocator == allocator)
return S_OK;
if (This->allocator)
IMemAllocator_Release(This->allocator);
This->allocator = allocator;
if (allocator)
IMemAllocator_AddRef(allocator);
return S_OK;
}
/* IMemInputPin */
static HRESULT WINAPI
SampleGrabber_IMemInputPin_GetAllocatorRequirements(IMemInputPin *iface, ALLOCATOR_PROPERTIES *props)
{
SG_Impl *This = impl_from_IMemInputPin(iface);
FIXME("(%p)->(%p): semi-stub\n", This, props);
if (!props)
return E_POINTER;
return This->memOutput ? IMemInputPin_GetAllocatorRequirements(This->memOutput, props) : E_NOTIMPL;
}
/* IMemInputPin */
static HRESULT WINAPI
SampleGrabber_IMemInputPin_Receive(IMemInputPin *iface, IMediaSample *sample)
{
SG_Impl *This = impl_from_IMemInputPin(iface);
HRESULT hr;
TRACE("(%p)->(%p) output = %p, grabber = %p\n", This, sample, This->memOutput, This->grabberIface);
if (!sample)
return E_POINTER;
if ((This->state != State_Running) || (This->oneShot == OneShot_Past))
return S_FALSE;
if (This->grabberIface)
SampleGrabber_callback(This, sample);
hr = This->memOutput ? IMemInputPin_Receive(This->memOutput, sample) : S_OK;
if (This->oneShot == OneShot_Wait) {
This->oneShot = OneShot_Past;
hr = S_FALSE;
if (This->pin_out.pair)
IPin_EndOfStream(This->pin_out.pair);
}
return hr;
}
/* IMemInputPin */
static HRESULT WINAPI
SampleGrabber_IMemInputPin_ReceiveMultiple(IMemInputPin *iface, IMediaSample **samples, LONG nSamples, LONG *nProcessed)
{
SG_Impl *This = impl_from_IMemInputPin(iface);
TRACE("(%p)->(%p, %u, %p) output = %p, grabber = %p\n", This, samples, nSamples, nProcessed, This->memOutput, This->grabberIface);
if (!samples || !nProcessed)
return E_POINTER;
if ((This->state != State_Running) || (This->oneShot == OneShot_Past))
return S_FALSE;
if (This->grabberIface) {
LONG idx;
for (idx = 0; idx < nSamples; idx++)
SampleGrabber_callback(This, samples[idx]);
}
return This->memOutput ? IMemInputPin_ReceiveMultiple(This->memOutput, samples, nSamples, nProcessed) : S_OK;
}
/* IMemInputPin */
static HRESULT WINAPI
SampleGrabber_IMemInputPin_ReceiveCanBlock(IMemInputPin *iface)
{
SG_Impl *This = impl_from_IMemInputPin(iface);
TRACE("(%p)\n", This);
return This->memOutput ? IMemInputPin_ReceiveCanBlock(This->memOutput) : S_OK;
}
/* SampleGrabber member pin implementation */
/* IUnknown */
static ULONG WINAPI
SampleGrabber_IPin_AddRef(IPin *iface)
{
return SampleGrabber_addref(((SG_Pin *)iface)->sg);
}
/* IUnknown */
static ULONG WINAPI
SampleGrabber_IPin_Release(IPin *iface)
{
return SampleGrabber_release(((SG_Pin *)iface)->sg);
}
/* IUnknown */
static HRESULT WINAPI
SampleGrabber_IPin_QueryInterface(IPin *iface, REFIID riid, void **ppvObject)
{
SG_Pin *This = (SG_Pin *)iface;
TRACE("(%p)->(%s %p)\n", This, debugstr_guid(riid), ppvObject);
if (IsEqualIID(riid, &IID_IUnknown) ||
IsEqualIID(riid, &IID_IPin)) {
SampleGrabber_addref(This->sg);
*ppvObject = This;
return S_OK;
}
else if (IsEqualIID(riid, &IID_IMemInputPin)) {
SampleGrabber_addref(This->sg);
*ppvObject = &(This->sg->IMemInputPin_Vtbl);
return S_OK;
}
*ppvObject = NULL;
WARN("(%p, %s,%p): not found\n", This, debugstr_guid(riid), ppvObject);
return E_NOINTERFACE;
}
/* IPin - input pin */
static HRESULT WINAPI
SampleGrabber_In_IPin_Connect(IPin *iface, IPin *receiver, const AM_MEDIA_TYPE *mtype)
{
WARN("(%p, %p): unexpected\n", receiver, mtype);
return E_UNEXPECTED;
}
/* IPin - output pin */
static HRESULT WINAPI
SampleGrabber_Out_IPin_Connect(IPin *iface, IPin *receiver, const AM_MEDIA_TYPE *type)
{
SG_Pin *This = (SG_Pin *)iface;
TRACE("(%p)->(%p, %p)\n", This, receiver, type);
if (!receiver)
return E_POINTER;
if (This->pair)
return VFW_E_ALREADY_CONNECTED;
if (This->sg->state != State_Stopped)
return VFW_E_NOT_STOPPED;
if (type) {
TRACE("Media type: %s/%s ssize: %u format: %s (%u bytes)\n",
debugstr_guid(&type->majortype), debugstr_guid(&type->subtype),
type->lSampleSize,
debugstr_guid(&type->formattype), type->cbFormat);
if (!IsEqualGUID(&This->sg->mtype.majortype,&GUID_NULL) &&
!IsEqualGUID(&This->sg->mtype.majortype,&type->majortype))
return VFW_E_TYPE_NOT_ACCEPTED;
if (!IsEqualGUID(&This->sg->mtype.subtype,&MEDIASUBTYPE_None) &&
!IsEqualGUID(&This->sg->mtype.subtype,&type->subtype))
return VFW_E_TYPE_NOT_ACCEPTED;
if (!IsEqualGUID(&This->sg->mtype.formattype,&GUID_NULL) &&
!IsEqualGUID(&This->sg->mtype.formattype,&FORMAT_None) &&
!IsEqualGUID(&This->sg->mtype.formattype,&type->formattype))
return VFW_E_TYPE_NOT_ACCEPTED;
}
This->pair = receiver;
if (This->sg->memOutput) {
IMemInputPin_Release(This->sg->memOutput);
This->sg->memOutput = NULL;
}
if (SUCCEEDED(IPin_QueryInterface(receiver,&IID_IMemInputPin,(void **)&(This->sg->memOutput))))
TRACE("pair IMemInputPin %p\n", This->sg->memOutput);
return S_OK;
}
/* IPin - input pin */
static HRESULT WINAPI
SampleGrabber_In_IPin_ReceiveConnection(IPin *iface, IPin *connector, const AM_MEDIA_TYPE *type)
{
SG_Pin *This = (SG_Pin *)iface;
TRACE("(%p)->(%p, %p)\n", This, connector, type);
if (!connector)
return E_POINTER;
if (This->pair)
return VFW_E_ALREADY_CONNECTED;
if (This->sg->state != State_Stopped)
return VFW_E_NOT_STOPPED;
if (type) {
TRACE("Media type: %s/%s ssize: %u format: %s (%u bytes)\n",
debugstr_guid(&type->majortype), debugstr_guid(&type->subtype),
type->lSampleSize,
debugstr_guid(&type->formattype), type->cbFormat);
if (!IsEqualGUID(&This->sg->mtype.majortype,&GUID_NULL) &&
!IsEqualGUID(&This->sg->mtype.majortype,&type->majortype))
return VFW_E_TYPE_NOT_ACCEPTED;
if (!IsEqualGUID(&This->sg->mtype.subtype,&MEDIASUBTYPE_None) &&
!IsEqualGUID(&This->sg->mtype.subtype,&type->subtype))
return VFW_E_TYPE_NOT_ACCEPTED;
if (!IsEqualGUID(&This->sg->mtype.formattype,&GUID_NULL) &&
!IsEqualGUID(&This->sg->mtype.formattype,&FORMAT_None) &&
!IsEqualGUID(&This->sg->mtype.formattype,&type->formattype))
return VFW_E_TYPE_NOT_ACCEPTED;
if (This->sg->mtype.pbFormat)
CoTaskMemFree(This->sg->mtype.pbFormat);
This->sg->mtype = *type;
This->sg->mtype.pUnk = NULL;
if (type->cbFormat) {
This->sg->mtype.pbFormat = CoTaskMemAlloc(type->cbFormat);
CopyMemory(This->sg->mtype.pbFormat, type->pbFormat, type->cbFormat);
}
else
This->sg->mtype.pbFormat = NULL;
}
This->pair = connector;
return S_OK;
}
/* IPin - output pin */
static HRESULT WINAPI
SampleGrabber_Out_IPin_ReceiveConnection(IPin *iface, IPin *connector, const AM_MEDIA_TYPE *mtype)
{
WARN("(%p, %p): unexpected\n", connector, mtype);
return E_UNEXPECTED;
}
/* IPin - input pin */
static HRESULT WINAPI
SampleGrabber_In_IPin_Disconnect(IPin *iface)
{
SG_Pin *This = (SG_Pin *)iface;
TRACE("(%p)->() pair = %p\n", This, This->pair);
if (This->sg->state != State_Stopped)
return VFW_E_NOT_STOPPED;
if (This->pair) {
This->pair = NULL;
return S_OK;
}
return S_FALSE;
}
/* IPin - output pin */
static HRESULT WINAPI
SampleGrabber_Out_IPin_Disconnect(IPin *iface)
{
SG_Pin *This = (SG_Pin *)iface;
TRACE("(%p)->() pair = %p\n", This, This->pair);
if (This->sg->state != State_Stopped)
return VFW_E_NOT_STOPPED;
if (This->pair) {
This->pair = NULL;
if (This->sg->memOutput) {
IMemInputPin_Release(This->sg->memOutput);
This->sg->memOutput = NULL;
}
return S_OK;
}
return S_FALSE;
}
/* IPin */
static HRESULT WINAPI
SampleGrabber_IPin_ConnectedTo(IPin *iface, IPin **pin)
{
SG_Pin *This = (SG_Pin *)iface;
TRACE("(%p)->(%p) pair = %p\n", This, pin, This->pair);
if (!pin)
return E_POINTER;
*pin = This->pair;
if (*pin) {
IPin_AddRef(*pin);
return S_OK;
}
return VFW_E_NOT_CONNECTED;
}
/* IPin */
static HRESULT WINAPI
SampleGrabber_IPin_ConnectionMediaType(IPin *iface, AM_MEDIA_TYPE *mtype)
{
SG_Pin *This = (SG_Pin *)iface;
TRACE("(%p)->(%p)\n", This, mtype);
if (!mtype)
return E_POINTER;
if (!This->pair)
return VFW_E_NOT_CONNECTED;
*mtype = This->sg->mtype;
if (mtype->cbFormat) {
mtype->pbFormat = CoTaskMemAlloc(mtype->cbFormat);
CopyMemory(mtype->pbFormat, This->sg->mtype.pbFormat, mtype->cbFormat);
}
return S_OK;
}
/* IPin */
static HRESULT WINAPI
SampleGrabber_IPin_QueryPinInfo(IPin *iface, PIN_INFO *info)
{
SG_Pin *This = (SG_Pin *)iface;
TRACE("(%p)->(%p)\n", This, info);
if (!info)
return E_POINTER;
SampleGrabber_addref(This->sg);
info->pFilter = (IBaseFilter *)This->sg;
info->dir = This->dir;
lstrcpynW(info->achName,This->name,MAX_PIN_NAME);
return S_OK;
}
/* IPin */
static HRESULT WINAPI
SampleGrabber_IPin_QueryDirection(IPin *iface, PIN_DIRECTION *dir)
{
SG_Pin *This = (SG_Pin *)iface;
TRACE("(%p)->(%p)\n", This, dir);
if (!dir)
return E_POINTER;
*dir = This->dir;
return S_OK;
}
/* IPin */
static HRESULT WINAPI
SampleGrabber_IPin_QueryId(IPin *iface, LPWSTR *id)
{
SG_Pin *This = (SG_Pin *)iface;
int len;
TRACE("(%p)->(%p)\n", This, id);
if (!id)
return E_POINTER;
len = sizeof(WCHAR)*(1+lstrlenW(This->name));
*id = CoTaskMemAlloc(len);
CopyMemory(*id, This->name, len);
return S_OK;
}
/* IPin */
static HRESULT WINAPI
SampleGrabber_IPin_QueryAccept(IPin *iface, const AM_MEDIA_TYPE *mtype)
{
TRACE("(%p)\n", mtype);
return S_OK;
}
/* IPin */
static HRESULT WINAPI
SampleGrabber_IPin_EnumMediaTypes(IPin *iface, IEnumMediaTypes **mtypes)
{
SG_Pin *This = (SG_Pin *)iface;
TRACE("(%p)->(%p)\n", This, mtypes);
if (!mtypes)
return E_POINTER;
*mtypes = mediaenum_create(&This->sg->mtype);
return *mtypes ? S_OK : E_OUTOFMEMORY;
}
/* IPin - input pin */
static HRESULT WINAPI
SampleGrabber_In_IPin_QueryInternalConnections(IPin *iface, IPin **pins, ULONG *nPins)
{
SG_Pin *This = (SG_Pin *)iface;
TRACE("(%p)->(%p, %p) size = %u\n", This, pins, nPins, (nPins ? *nPins : 0));
if (!nPins)
return E_POINTER;
if (*nPins) {
if (!pins)
return E_POINTER;
IPin_AddRef((IPin*)&This->sg->pin_out.lpVtbl);
*pins = (IPin*)&This->sg->pin_out.lpVtbl;
*nPins = 1;
return S_OK;
}
*nPins = 1;
return S_FALSE;
}
/* IPin - output pin */
static HRESULT WINAPI
SampleGrabber_Out_IPin_QueryInternalConnections(IPin *iface, IPin **pins, ULONG *nPins)
{
WARN("(%p, %p): unexpected\n", pins, nPins);
if (nPins)
*nPins = 0;
return E_NOTIMPL;
}
/* IPin */
static HRESULT WINAPI
SampleGrabber_IPin_EndOfStream(IPin *iface)
{
FIXME(": stub\n");
return S_OK;
}
/* IPin */
static HRESULT WINAPI
SampleGrabber_IPin_BeginFlush(IPin *iface)
{
FIXME(": stub\n");
return S_OK;
}
/* IPin */
static HRESULT WINAPI
SampleGrabber_IPin_EndFlush(IPin *iface)
{
FIXME(": stub\n");
return S_OK;
}
/* IPin */
static HRESULT WINAPI
SampleGrabber_IPin_NewSegment(IPin *iface, REFERENCE_TIME tStart, REFERENCE_TIME tStop, double rate)
{
FIXME(": stub\n");
return S_OK;
}
/* SampleGrabber vtables and constructor */
static const IBaseFilterVtbl IBaseFilter_VTable =
{
SampleGrabber_IBaseFilter_QueryInterface,
SampleGrabber_IBaseFilter_AddRef,
SampleGrabber_IBaseFilter_Release,
SampleGrabber_IBaseFilter_GetClassID,
SampleGrabber_IBaseFilter_Stop,
SampleGrabber_IBaseFilter_Pause,
SampleGrabber_IBaseFilter_Run,
SampleGrabber_IBaseFilter_GetState,
SampleGrabber_IBaseFilter_SetSyncSource,
SampleGrabber_IBaseFilter_GetSyncSource,
SampleGrabber_IBaseFilter_EnumPins,
SampleGrabber_IBaseFilter_FindPin,
SampleGrabber_IBaseFilter_QueryFilterInfo,
SampleGrabber_IBaseFilter_JoinFilterGraph,
SampleGrabber_IBaseFilter_QueryVendorInfo,
};
static const ISampleGrabberVtbl ISampleGrabber_VTable =
{
SampleGrabber_ISampleGrabber_QueryInterface,
SampleGrabber_ISampleGrabber_AddRef,
SampleGrabber_ISampleGrabber_Release,
SampleGrabber_ISampleGrabber_SetOneShot,
SampleGrabber_ISampleGrabber_SetMediaType,
SampleGrabber_ISampleGrabber_GetConnectedMediaType,
SampleGrabber_ISampleGrabber_SetBufferSamples,
SampleGrabber_ISampleGrabber_GetCurrentBuffer,
SampleGrabber_ISampleGrabber_GetCurrentSample,
SampleGrabber_ISampleGrabber_SetCallback,
};
static const IMemInputPinVtbl IMemInputPin_VTable =
{
SampleGrabber_IMemInputPin_QueryInterface,
SampleGrabber_IMemInputPin_AddRef,
SampleGrabber_IMemInputPin_Release,
SampleGrabber_IMemInputPin_GetAllocator,
SampleGrabber_IMemInputPin_NotifyAllocator,
SampleGrabber_IMemInputPin_GetAllocatorRequirements,
SampleGrabber_IMemInputPin_Receive,
SampleGrabber_IMemInputPin_ReceiveMultiple,
SampleGrabber_IMemInputPin_ReceiveCanBlock,
};
static const IPinVtbl IPin_In_VTable =
{
SampleGrabber_IPin_QueryInterface,
SampleGrabber_IPin_AddRef,
SampleGrabber_IPin_Release,
SampleGrabber_In_IPin_Connect,
SampleGrabber_In_IPin_ReceiveConnection,
SampleGrabber_In_IPin_Disconnect,
SampleGrabber_IPin_ConnectedTo,
SampleGrabber_IPin_ConnectionMediaType,
SampleGrabber_IPin_QueryPinInfo,
SampleGrabber_IPin_QueryDirection,
SampleGrabber_IPin_QueryId,
SampleGrabber_IPin_QueryAccept,
SampleGrabber_IPin_EnumMediaTypes,
SampleGrabber_In_IPin_QueryInternalConnections,
SampleGrabber_IPin_EndOfStream,
SampleGrabber_IPin_BeginFlush,
SampleGrabber_IPin_EndFlush,
SampleGrabber_IPin_NewSegment,
};
static const IPinVtbl IPin_Out_VTable =
{
SampleGrabber_IPin_QueryInterface,
SampleGrabber_IPin_AddRef,
SampleGrabber_IPin_Release,
SampleGrabber_Out_IPin_Connect,
SampleGrabber_Out_IPin_ReceiveConnection,
SampleGrabber_Out_IPin_Disconnect,
SampleGrabber_IPin_ConnectedTo,
SampleGrabber_IPin_ConnectionMediaType,
SampleGrabber_IPin_QueryPinInfo,
SampleGrabber_IPin_QueryDirection,
SampleGrabber_IPin_QueryId,
SampleGrabber_IPin_QueryAccept,
SampleGrabber_IPin_EnumMediaTypes,
SampleGrabber_Out_IPin_QueryInternalConnections,
SampleGrabber_IPin_EndOfStream,
SampleGrabber_IPin_BeginFlush,
SampleGrabber_IPin_EndFlush,
SampleGrabber_IPin_NewSegment,
};
HRESULT SampleGrabber_create(IUnknown *pUnkOuter, LPVOID *ppv)
{
SG_Impl* obj = NULL;
TRACE("(%p,%p)\n", ppv, pUnkOuter);
if (pUnkOuter)
return CLASS_E_NOAGGREGATION;
obj = CoTaskMemAlloc(sizeof(SG_Impl));
if (NULL == obj) {
*ppv = NULL;
return E_OUTOFMEMORY;
}
ZeroMemory(obj, sizeof(SG_Impl));
obj->refCount = 1;
obj->IBaseFilter_Vtbl = &IBaseFilter_VTable;
obj->ISampleGrabber_Vtbl = &ISampleGrabber_VTable;
obj->IMemInputPin_Vtbl = &IMemInputPin_VTable;
obj->pin_in.lpVtbl = &IPin_In_VTable;
obj->pin_in.dir = PINDIR_INPUT;
obj->pin_in.name = pin_in_name;
obj->pin_in.sg = obj;
obj->pin_in.pair = NULL;
obj->pin_out.lpVtbl = &IPin_Out_VTable;
obj->pin_out.dir = PINDIR_OUTPUT;
obj->pin_out.name = pin_out_name;
obj->pin_out.sg = obj;
obj->pin_out.pair = NULL;
obj->info.achName[0] = 0;
obj->info.pGraph = NULL;
obj->state = State_Stopped;
obj->mtype.majortype = GUID_NULL;
obj->mtype.subtype = MEDIASUBTYPE_None;
obj->mtype.formattype = FORMAT_None;
obj->allocator = NULL;
obj->refClock = NULL;
obj->memOutput = NULL;
obj->grabberIface = NULL;
obj->grabberMethod = -1;
obj->oneShot = OneShot_None;
*ppv = obj;
return S_OK;
}
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