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winamp/Src/Plugins/Input/in_dshow/base/ctlutil.cpp

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//------------------------------------------------------------------------------
// File: CtlUtil.cpp
//
// Desc: DirectShow base classes.
//
// Copyright (c) 1992-2001 Microsoft Corporation. All rights reserved.
//------------------------------------------------------------------------------
// Base classes implementing IDispatch parsing for the basic control dual
// interfaces. Derive from these and implement just the custom method and
// property methods. We also implement CPosPassThru that can be used by
// renderers and transforms to pass by IMediaPosition and IMediaSeeking
#include <streams.h>
#include <limits.h>
#include "seekpt.h"
// 'bool' non standard reserved word
#pragma warning(disable:4237)
// --- CBaseDispatch implementation ----------
CBaseDispatch::~CBaseDispatch()
{
if (m_pti) {
m_pti->Release();
}
}
// return 1 if we support GetTypeInfo
STDMETHODIMP
CBaseDispatch::GetTypeInfoCount(__out UINT * pctinfo)
{
CheckPointer(pctinfo,E_POINTER);
ValidateReadWritePtr(pctinfo,sizeof(UINT *));
*pctinfo = 1;
return S_OK;
}
typedef HRESULT (STDAPICALLTYPE *LPLOADTYPELIB)(
const OLECHAR FAR *szFile,
__deref_out ITypeLib FAR* FAR* pptlib);
typedef HRESULT (STDAPICALLTYPE *LPLOADREGTYPELIB)(REFGUID rguid,
WORD wVerMajor,
WORD wVerMinor,
LCID lcid,
__deref_out ITypeLib FAR* FAR* pptlib);
// attempt to find our type library
STDMETHODIMP
CBaseDispatch::GetTypeInfo(
REFIID riid,
UINT itinfo,
LCID lcid,
__deref_out ITypeInfo ** pptinfo)
{
CheckPointer(pptinfo,E_POINTER);
ValidateReadWritePtr(pptinfo,sizeof(ITypeInfo *));
HRESULT hr;
*pptinfo = NULL;
// we only support one type element
if (0 != itinfo) {
return TYPE_E_ELEMENTNOTFOUND;
}
if (NULL == pptinfo) {
return E_POINTER;
}
// always look for neutral
if (NULL == m_pti) {
LPLOADTYPELIB lpfnLoadTypeLib;
LPLOADREGTYPELIB lpfnLoadRegTypeLib;
ITypeLib *ptlib;
HINSTANCE hInst;
static const char szTypeLib[] = "LoadTypeLib";
static const char szRegTypeLib[] = "LoadRegTypeLib";
static const WCHAR szControl[] = L"control.tlb";
//
// Try to get the Ole32Aut.dll module handle.
//
hInst = LoadOLEAut32();
if (hInst == NULL) {
DWORD dwError = GetLastError();
return AmHresultFromWin32(dwError);
}
lpfnLoadRegTypeLib = (LPLOADREGTYPELIB)GetProcAddress(hInst,
szRegTypeLib);
if (lpfnLoadRegTypeLib == NULL) {
DWORD dwError = GetLastError();
return AmHresultFromWin32(dwError);
}
hr = (*lpfnLoadRegTypeLib)(LIBID_QuartzTypeLib, 1, 0, // version 1.0
lcid, &ptlib);
if (FAILED(hr)) {
// attempt to load directly - this will fill the
// registry in if it finds it
lpfnLoadTypeLib = (LPLOADTYPELIB)GetProcAddress(hInst, szTypeLib);
if (lpfnLoadTypeLib == NULL) {
DWORD dwError = GetLastError();
return AmHresultFromWin32(dwError);
}
hr = (*lpfnLoadTypeLib)(szControl, &ptlib);
if (FAILED(hr)) {
return hr;
}
}
hr = ptlib->GetTypeInfoOfGuid(
riid,
&m_pti);
ptlib->Release();
if (FAILED(hr)) {
return hr;
}
}
*pptinfo = m_pti;
m_pti->AddRef();
return S_OK;
}
STDMETHODIMP
CBaseDispatch::GetIDsOfNames(
REFIID riid,
__in_ecount(cNames) LPOLESTR * rgszNames,
UINT cNames,
LCID lcid,
__out_ecount(cNames) DISPID * rgdispid)
{
// although the IDispatch riid is dead, we use this to pass from
// the interface implementation class to us the iid we are talking about.
ITypeInfo * pti;
HRESULT hr = GetTypeInfo(riid, 0, lcid, &pti);
if (SUCCEEDED(hr)) {
hr = pti->GetIDsOfNames(rgszNames, cNames, rgdispid);
pti->Release();
}
return hr;
}
// --- CMediaControl implementation ---------
CMediaControl::CMediaControl(const TCHAR * name,LPUNKNOWN pUnk) :
CUnknown(name, pUnk)
{
}
// expose our interfaces IMediaControl and IUnknown
STDMETHODIMP
CMediaControl::NonDelegatingQueryInterface(REFIID riid, __deref_out void **ppv)
{
ValidateReadWritePtr(ppv,sizeof(PVOID));
if (riid == IID_IMediaControl) {
return GetInterface( (IMediaControl *) this, ppv);
} else {
return CUnknown::NonDelegatingQueryInterface(riid, ppv);
}
}
// return 1 if we support GetTypeInfo
STDMETHODIMP
CMediaControl::GetTypeInfoCount(__out UINT * pctinfo)
{
return m_basedisp.GetTypeInfoCount(pctinfo);
}
// attempt to find our type library
STDMETHODIMP
CMediaControl::GetTypeInfo(
UINT itinfo,
LCID lcid,
__deref_out ITypeInfo ** pptinfo)
{
return m_basedisp.GetTypeInfo(
IID_IMediaControl,
itinfo,
lcid,
pptinfo);
}
STDMETHODIMP
CMediaControl::GetIDsOfNames(
REFIID riid,
__in_ecount(cNames) LPOLESTR * rgszNames,
UINT cNames,
LCID lcid,
__out_ecount(cNames) DISPID * rgdispid)
{
return m_basedisp.GetIDsOfNames(
IID_IMediaControl,
rgszNames,
cNames,
lcid,
rgdispid);
}
STDMETHODIMP
CMediaControl::Invoke(
DISPID dispidMember,
REFIID riid,
LCID lcid,
WORD wFlags,
__in DISPPARAMS * pdispparams,
__out_opt VARIANT * pvarResult,
__out_opt EXCEPINFO * pexcepinfo,
__out_opt UINT * puArgErr)
{
// this parameter is a dead leftover from an earlier interface
if (IID_NULL != riid) {
return DISP_E_UNKNOWNINTERFACE;
}
ITypeInfo * pti;
HRESULT hr = GetTypeInfo(0, lcid, &pti);
if (FAILED(hr)) {
return hr;
}
hr = pti->Invoke(
(IMediaControl *)this,
dispidMember,
wFlags,
pdispparams,
pvarResult,
pexcepinfo,
puArgErr);
pti->Release();
return hr;
}
// --- CMediaEvent implementation ----------
CMediaEvent::CMediaEvent(__in_opt LPCTSTR name,__in_opt LPUNKNOWN pUnk) :
CUnknown(name, pUnk)
{
}
// expose our interfaces IMediaEvent and IUnknown
STDMETHODIMP
CMediaEvent::NonDelegatingQueryInterface(REFIID riid, __deref_out void **ppv)
{
ValidateReadWritePtr(ppv,sizeof(PVOID));
if (riid == IID_IMediaEvent || riid == IID_IMediaEventEx) {
return GetInterface( (IMediaEventEx *) this, ppv);
} else {
return CUnknown::NonDelegatingQueryInterface(riid, ppv);
}
}
// return 1 if we support GetTypeInfo
STDMETHODIMP
CMediaEvent::GetTypeInfoCount(__out UINT * pctinfo)
{
return m_basedisp.GetTypeInfoCount(pctinfo);
}
// attempt to find our type library
STDMETHODIMP
CMediaEvent::GetTypeInfo(
UINT itinfo,
LCID lcid,
__deref_out ITypeInfo ** pptinfo)
{
return m_basedisp.GetTypeInfo(
IID_IMediaEvent,
itinfo,
lcid,
pptinfo);
}
STDMETHODIMP
CMediaEvent::GetIDsOfNames(
REFIID riid,
__in_ecount(cNames) LPOLESTR * rgszNames,
UINT cNames,
LCID lcid,
__out_ecount(cNames) DISPID * rgdispid)
{
return m_basedisp.GetIDsOfNames(
IID_IMediaEvent,
rgszNames,
cNames,
lcid,
rgdispid);
}
STDMETHODIMP
CMediaEvent::Invoke(
DISPID dispidMember,
REFIID riid,
LCID lcid,
WORD wFlags,
__in DISPPARAMS * pdispparams,
__out_opt VARIANT * pvarResult,
__out_opt EXCEPINFO * pexcepinfo,
__out_opt UINT * puArgErr)
{
// this parameter is a dead leftover from an earlier interface
if (IID_NULL != riid) {
return DISP_E_UNKNOWNINTERFACE;
}
ITypeInfo * pti;
HRESULT hr = GetTypeInfo(0, lcid, &pti);
if (FAILED(hr)) {
return hr;
}
hr = pti->Invoke(
(IMediaEvent *)this,
dispidMember,
wFlags,
pdispparams,
pvarResult,
pexcepinfo,
puArgErr);
pti->Release();
return hr;
}
// --- CMediaPosition implementation ----------
CMediaPosition::CMediaPosition(__in_opt LPCTSTR name,__in_opt LPUNKNOWN pUnk) :
CUnknown(name, pUnk)
{
}
CMediaPosition::CMediaPosition(__in_opt LPCTSTR name,
__in_opt LPUNKNOWN pUnk,
__inout HRESULT * phr) :
CUnknown(name, pUnk)
{
UNREFERENCED_PARAMETER(phr);
}
// expose our interfaces IMediaPosition and IUnknown
STDMETHODIMP
CMediaPosition::NonDelegatingQueryInterface(REFIID riid, __deref_out void **ppv)
{
ValidateReadWritePtr(ppv,sizeof(PVOID));
if (riid == IID_IMediaPosition) {
return GetInterface( (IMediaPosition *) this, ppv);
} else {
return CUnknown::NonDelegatingQueryInterface(riid, ppv);
}
}
// return 1 if we support GetTypeInfo
STDMETHODIMP
CMediaPosition::GetTypeInfoCount(__out UINT * pctinfo)
{
return m_basedisp.GetTypeInfoCount(pctinfo);
}
// attempt to find our type library
STDMETHODIMP
CMediaPosition::GetTypeInfo(
UINT itinfo,
LCID lcid,
__deref_out ITypeInfo ** pptinfo)
{
return m_basedisp.GetTypeInfo(
IID_IMediaPosition,
itinfo,
lcid,
pptinfo);
}
STDMETHODIMP
CMediaPosition::GetIDsOfNames(
REFIID riid,
__in_ecount(cNames) LPOLESTR * rgszNames,
UINT cNames,
LCID lcid,
__out_ecount(cNames) DISPID * rgdispid)
{
return m_basedisp.GetIDsOfNames(
IID_IMediaPosition,
rgszNames,
cNames,
lcid,
rgdispid);
}
STDMETHODIMP
CMediaPosition::Invoke(
DISPID dispidMember,
REFIID riid,
LCID lcid,
WORD wFlags,
__in DISPPARAMS * pdispparams,
__out_opt VARIANT * pvarResult,
__out_opt EXCEPINFO * pexcepinfo,
__out_opt UINT * puArgErr)
{
// this parameter is a dead leftover from an earlier interface
if (IID_NULL != riid) {
return DISP_E_UNKNOWNINTERFACE;
}
ITypeInfo * pti;
HRESULT hr = GetTypeInfo(0, lcid, &pti);
if (FAILED(hr)) {
return hr;
}
hr = pti->Invoke(
(IMediaPosition *)this,
dispidMember,
wFlags,
pdispparams,
pvarResult,
pexcepinfo,
puArgErr);
pti->Release();
return hr;
}
// --- IMediaPosition and IMediaSeeking pass through class ----------
CPosPassThru::CPosPassThru(__in_opt LPCTSTR pName,
__in_opt LPUNKNOWN pUnk,
__inout HRESULT *phr,
IPin *pPin) :
CMediaPosition(pName,pUnk),
m_pPin(pPin)
{
if (pPin == NULL) {
*phr = E_POINTER;
return;
}
}
// Expose our IMediaSeeking and IMediaPosition interfaces
STDMETHODIMP
CPosPassThru::NonDelegatingQueryInterface(REFIID riid,__deref_out void **ppv)
{
CheckPointer(ppv,E_POINTER);
*ppv = NULL;
if (riid == IID_IMediaSeeking) {
return GetInterface( static_cast<IMediaSeeking *>(this), ppv);
}
return CMediaPosition::NonDelegatingQueryInterface(riid,ppv);
}
// Return the IMediaPosition interface from our peer
HRESULT
CPosPassThru::GetPeer(IMediaPosition ** ppMP)
{
*ppMP = NULL;
IPin *pConnected;
HRESULT hr = m_pPin->ConnectedTo(&pConnected);
if (FAILED(hr)) {
return E_NOTIMPL;
}
IMediaPosition * pMP;
hr = pConnected->QueryInterface(IID_IMediaPosition, (void **) &pMP);
pConnected->Release();
if (FAILED(hr)) {
return E_NOTIMPL;
}
*ppMP = pMP;
return S_OK;
}
// Return the IMediaSeeking interface from our peer
HRESULT
CPosPassThru::GetPeerSeeking(__deref_out IMediaSeeking ** ppMS)
{
*ppMS = NULL;
IPin *pConnected;
HRESULT hr = m_pPin->ConnectedTo(&pConnected);
if (FAILED(hr)) {
return E_NOTIMPL;
}
IMediaSeeking * pMS;
hr = pConnected->QueryInterface(IID_IMediaSeeking, (void **) &pMS);
pConnected->Release();
if (FAILED(hr)) {
return E_NOTIMPL;
}
*ppMS = pMS;
return S_OK;
}
// --- IMediaSeeking methods ----------
STDMETHODIMP
CPosPassThru::GetCapabilities(__out DWORD * pCaps)
{
IMediaSeeking* pMS;
HRESULT hr = GetPeerSeeking(&pMS);
if (FAILED(hr)) {
return hr;
}
hr = pMS->GetCapabilities(pCaps);
pMS->Release();
return hr;
}
STDMETHODIMP
CPosPassThru::CheckCapabilities(__inout DWORD * pCaps)
{
IMediaSeeking* pMS;
HRESULT hr = GetPeerSeeking(&pMS);
if (FAILED(hr)) {
return hr;
}
hr = pMS->CheckCapabilities(pCaps);
pMS->Release();
return hr;
}
STDMETHODIMP
CPosPassThru::IsFormatSupported(const GUID * pFormat)
{
IMediaSeeking* pMS;
HRESULT hr = GetPeerSeeking(&pMS);
if (FAILED(hr)) {
return hr;
}
hr = pMS->IsFormatSupported(pFormat);
pMS->Release();
return hr;
}
STDMETHODIMP
CPosPassThru::QueryPreferredFormat(__out GUID *pFormat)
{
IMediaSeeking* pMS;
HRESULT hr = GetPeerSeeking(&pMS);
if (FAILED(hr)) {
return hr;
}
hr = pMS->QueryPreferredFormat(pFormat);
pMS->Release();
return hr;
}
STDMETHODIMP
CPosPassThru::SetTimeFormat(const GUID * pFormat)
{
IMediaSeeking* pMS;
HRESULT hr = GetPeerSeeking(&pMS);
if (FAILED(hr)) {
return hr;
}
hr = pMS->SetTimeFormat(pFormat);
pMS->Release();
return hr;
}
STDMETHODIMP
CPosPassThru::GetTimeFormat(__out GUID *pFormat)
{
IMediaSeeking* pMS;
HRESULT hr = GetPeerSeeking(&pMS);
if (FAILED(hr)) {
return hr;
}
hr = pMS->GetTimeFormat(pFormat);
pMS->Release();
return hr;
}
STDMETHODIMP
CPosPassThru::IsUsingTimeFormat(const GUID * pFormat)
{
IMediaSeeking* pMS;
HRESULT hr = GetPeerSeeking(&pMS);
if (FAILED(hr)) {
return hr;
}
hr = pMS->IsUsingTimeFormat(pFormat);
pMS->Release();
return hr;
}
STDMETHODIMP
CPosPassThru::ConvertTimeFormat(__out LONGLONG * pTarget,
__in_opt const GUID * pTargetFormat,
LONGLONG Source,
__in_opt const GUID * pSourceFormat )
{
IMediaSeeking* pMS;
HRESULT hr = GetPeerSeeking(&pMS);
if (FAILED(hr)) {
return hr;
}
hr = pMS->ConvertTimeFormat(pTarget, pTargetFormat, Source, pSourceFormat );
pMS->Release();
return hr;
}
STDMETHODIMP
CPosPassThru::SetPositions( __inout_opt LONGLONG * pCurrent,
DWORD CurrentFlags,
__inout_opt LONGLONG * pStop,
DWORD StopFlags )
{
IMediaSeeking* pMS;
HRESULT hr = GetPeerSeeking(&pMS);
if (FAILED(hr)) {
return hr;
}
hr = pMS->SetPositions(pCurrent, CurrentFlags, pStop, StopFlags );
pMS->Release();
return hr;
}
STDMETHODIMP
CPosPassThru::GetPositions(__out_opt LONGLONG *pCurrent, __out_opt LONGLONG * pStop)
{
IMediaSeeking* pMS;
HRESULT hr = GetPeerSeeking(&pMS);
if (FAILED(hr)) {
return hr;
}
hr = pMS->GetPositions(pCurrent,pStop);
pMS->Release();
return hr;
}
HRESULT
CPosPassThru::GetSeekingLongLong
( HRESULT (__stdcall IMediaSeeking::*pMethod)( __out LONGLONG * )
, LONGLONG * pll
)
{
IMediaSeeking* pMS;
HRESULT hr = GetPeerSeeking(&pMS);
if (SUCCEEDED(hr))
{
hr = (pMS->*pMethod)(pll);
pMS->Release();
}
return hr;
}
// If we don't have a current position then ask upstream
STDMETHODIMP
CPosPassThru::GetCurrentPosition(__out LONGLONG *pCurrent)
{
// Can we report the current position
HRESULT hr = GetMediaTime(pCurrent,NULL);
if (SUCCEEDED(hr)) hr = NOERROR;
else hr = GetSeekingLongLong( &IMediaSeeking::GetCurrentPosition, pCurrent );
return hr;
}
STDMETHODIMP
CPosPassThru::GetStopPosition(__out LONGLONG *pStop)
{
return GetSeekingLongLong( &IMediaSeeking::GetStopPosition, pStop );;
}
STDMETHODIMP
CPosPassThru::GetDuration(__out LONGLONG *pDuration)
{
return GetSeekingLongLong( &IMediaSeeking::GetDuration, pDuration );;
}
STDMETHODIMP
CPosPassThru::GetPreroll(__out LONGLONG *pllPreroll)
{
return GetSeekingLongLong( &IMediaSeeking::GetPreroll, pllPreroll );;
}
STDMETHODIMP
CPosPassThru::GetAvailable( __out_opt LONGLONG *pEarliest, __out_opt LONGLONG *pLatest )
{
IMediaSeeking* pMS;
HRESULT hr = GetPeerSeeking(&pMS);
if (FAILED(hr)) {
return hr;
}
hr = pMS->GetAvailable( pEarliest, pLatest );
pMS->Release();
return hr;
}
STDMETHODIMP
CPosPassThru::GetRate(__out double * pdRate)
{
IMediaSeeking* pMS;
HRESULT hr = GetPeerSeeking(&pMS);
if (FAILED(hr)) {
return hr;
}
hr = pMS->GetRate(pdRate);
pMS->Release();
return hr;
}
STDMETHODIMP
CPosPassThru::SetRate(double dRate)
{
if (0.0 == dRate) {
return E_INVALIDARG;
}
IMediaSeeking* pMS;
HRESULT hr = GetPeerSeeking(&pMS);
if (FAILED(hr)) {
return hr;
}
hr = pMS->SetRate(dRate);
pMS->Release();
return hr;
}
// --- IMediaPosition methods ----------
STDMETHODIMP
CPosPassThru::get_Duration(__out REFTIME * plength)
{
IMediaPosition* pMP;
HRESULT hr = GetPeer(&pMP);
if (FAILED(hr)) {
return hr;
}
hr = pMP->get_Duration(plength);
pMP->Release();
return hr;
}
STDMETHODIMP
CPosPassThru::get_CurrentPosition(__out REFTIME * pllTime)
{
IMediaPosition* pMP;
HRESULT hr = GetPeer(&pMP);
if (FAILED(hr)) {
return hr;
}
hr = pMP->get_CurrentPosition(pllTime);
pMP->Release();
return hr;
}
STDMETHODIMP
CPosPassThru::put_CurrentPosition(REFTIME llTime)
{
IMediaPosition* pMP;
HRESULT hr = GetPeer(&pMP);
if (FAILED(hr)) {
return hr;
}
hr = pMP->put_CurrentPosition(llTime);
pMP->Release();
return hr;
}
STDMETHODIMP
CPosPassThru::get_StopTime(__out REFTIME * pllTime)
{
IMediaPosition* pMP;
HRESULT hr = GetPeer(&pMP);
if (FAILED(hr)) {
return hr;
}
hr = pMP->get_StopTime(pllTime);
pMP->Release();
return hr;
}
STDMETHODIMP
CPosPassThru::put_StopTime(REFTIME llTime)
{
IMediaPosition* pMP;
HRESULT hr = GetPeer(&pMP);
if (FAILED(hr)) {
return hr;
}
hr = pMP->put_StopTime(llTime);
pMP->Release();
return hr;
}
STDMETHODIMP
CPosPassThru::get_PrerollTime(__out REFTIME * pllTime)
{
IMediaPosition* pMP;
HRESULT hr = GetPeer(&pMP);
if (FAILED(hr)) {
return hr;
}
hr = pMP->get_PrerollTime(pllTime);
pMP->Release();
return hr;
}
STDMETHODIMP
CPosPassThru::put_PrerollTime(REFTIME llTime)
{
IMediaPosition* pMP;
HRESULT hr = GetPeer(&pMP);
if (FAILED(hr)) {
return hr;
}
hr = pMP->put_PrerollTime(llTime);
pMP->Release();
return hr;
}
STDMETHODIMP
CPosPassThru::get_Rate(__out double * pdRate)
{
IMediaPosition* pMP;
HRESULT hr = GetPeer(&pMP);
if (FAILED(hr)) {
return hr;
}
hr = pMP->get_Rate(pdRate);
pMP->Release();
return hr;
}
STDMETHODIMP
CPosPassThru::put_Rate(double dRate)
{
if (0.0 == dRate) {
return E_INVALIDARG;
}
IMediaPosition* pMP;
HRESULT hr = GetPeer(&pMP);
if (FAILED(hr)) {
return hr;
}
hr = pMP->put_Rate(dRate);
pMP->Release();
return hr;
}
STDMETHODIMP
CPosPassThru::CanSeekForward(__out LONG *pCanSeekForward)
{
IMediaPosition* pMP;
HRESULT hr = GetPeer(&pMP);
if (FAILED(hr)) {
return hr;
}
hr = pMP->CanSeekForward(pCanSeekForward);
pMP->Release();
return hr;
}
STDMETHODIMP
CPosPassThru::CanSeekBackward(__out LONG *pCanSeekBackward)
{
IMediaPosition* pMP;
HRESULT hr = GetPeer(&pMP);
if (FAILED(hr)) {
return hr;
}
hr = pMP->CanSeekBackward(pCanSeekBackward);
pMP->Release();
return hr;
}
// --- Implements the CRendererPosPassThru class ----------
// Media times (eg current frame, field, sample etc) are passed through the
// filtergraph in media samples. When a renderer gets a sample with media
// times in it, it will call one of the RegisterMediaTime methods we expose
// (one takes an IMediaSample, the other takes the media times direct). We
// store the media times internally and return them in GetCurrentPosition.
CRendererPosPassThru::CRendererPosPassThru(__in_opt LPCTSTR pName,
__in_opt LPUNKNOWN pUnk,
__inout HRESULT *phr,
IPin *pPin) :
CPosPassThru(pName,pUnk,phr,pPin),
m_StartMedia(0),
m_EndMedia(0),
m_bReset(TRUE)
{
}
// Sets the media times the object should report
HRESULT
CRendererPosPassThru::RegisterMediaTime(IMediaSample *pMediaSample)
{
ASSERT(pMediaSample);
LONGLONG StartMedia;
LONGLONG EndMedia;
CAutoLock cAutoLock(&m_PositionLock);
// Get the media times from the sample
HRESULT hr = pMediaSample->GetTime(&StartMedia,&EndMedia);
if (FAILED(hr))
{
ASSERT(hr == VFW_E_SAMPLE_TIME_NOT_SET);
return hr;
}
m_StartMedia = StartMedia;
m_EndMedia = EndMedia;
m_bReset = FALSE;
return NOERROR;
}
// Sets the media times the object should report
HRESULT
CRendererPosPassThru::RegisterMediaTime(LONGLONG StartTime,LONGLONG EndTime)
{
CAutoLock cAutoLock(&m_PositionLock);
m_StartMedia = StartTime;
m_EndMedia = EndTime;
m_bReset = FALSE;
return NOERROR;
}
// Return the current media times registered in the object
HRESULT
CRendererPosPassThru::GetMediaTime(__out LONGLONG *pStartTime, __out_opt LONGLONG *pEndTime)
{
ASSERT(pStartTime);
CAutoLock cAutoLock(&m_PositionLock);
if (m_bReset == TRUE) {
return E_FAIL;
}
// We don't have to return the end time
HRESULT hr = ConvertTimeFormat( pStartTime, 0, m_StartMedia, &TIME_FORMAT_MEDIA_TIME );
if (pEndTime && SUCCEEDED(hr)) {
hr = ConvertTimeFormat( pEndTime, 0, m_EndMedia, &TIME_FORMAT_MEDIA_TIME );
}
return hr;
}
// Resets the media times we hold
HRESULT
CRendererPosPassThru::ResetMediaTime()
{
CAutoLock cAutoLock(&m_PositionLock);
m_StartMedia = 0;
m_EndMedia = 0;
m_bReset = TRUE;
return NOERROR;
}
// Intended to be called by the owing filter during EOS processing so
// that the media times can be adjusted to the stop time. This ensures
// that the GetCurrentPosition will actully get to the stop position.
HRESULT
CRendererPosPassThru::EOS()
{
HRESULT hr;
if ( m_bReset == TRUE ) hr = E_FAIL;
else
{
LONGLONG llStop;
if SUCCEEDED(hr=GetStopPosition(&llStop))
{
CAutoLock cAutoLock(&m_PositionLock);
m_StartMedia =
m_EndMedia = llStop;
}
}
return hr;
}
// -- CSourceSeeking implementation ------------
CSourceSeeking::CSourceSeeking(
__in_opt LPCTSTR pName,
__in_opt LPUNKNOWN pUnk,
__inout HRESULT* phr,
__in CCritSec * pLock) :
CUnknown(pName, pUnk),
m_pLock(pLock),
m_rtStart((long)0)
{
m_rtStop = _I64_MAX / 2;
m_rtDuration = m_rtStop;
m_dRateSeeking = 1.0;
m_dwSeekingCaps = AM_SEEKING_CanSeekForwards
| AM_SEEKING_CanSeekBackwards
| AM_SEEKING_CanSeekAbsolute
| AM_SEEKING_CanGetStopPos
| AM_SEEKING_CanGetDuration;
}
HRESULT CSourceSeeking::NonDelegatingQueryInterface(REFIID riid, __deref_out void **ppv)
{
if(riid == IID_IMediaSeeking) {
CheckPointer(ppv, E_POINTER);
return GetInterface(static_cast<IMediaSeeking *>(this), ppv);
}
else {
return CUnknown::NonDelegatingQueryInterface(riid, ppv);
}
}
HRESULT CSourceSeeking::IsFormatSupported(const GUID * pFormat)
{
CheckPointer(pFormat, E_POINTER);
// only seeking in time (REFERENCE_TIME units) is supported
return *pFormat == TIME_FORMAT_MEDIA_TIME ? S_OK : S_FALSE;
}
HRESULT CSourceSeeking::QueryPreferredFormat(__out GUID *pFormat)
{
CheckPointer(pFormat, E_POINTER);
*pFormat = TIME_FORMAT_MEDIA_TIME;
return S_OK;
}
HRESULT CSourceSeeking::SetTimeFormat(const GUID * pFormat)
{
CheckPointer(pFormat, E_POINTER);
// nothing to set; just check that it's TIME_FORMAT_TIME
return *pFormat == TIME_FORMAT_MEDIA_TIME ? S_OK : E_INVALIDARG;
}
HRESULT CSourceSeeking::IsUsingTimeFormat(const GUID * pFormat)
{
CheckPointer(pFormat, E_POINTER);
return *pFormat == TIME_FORMAT_MEDIA_TIME ? S_OK : S_FALSE;
}
HRESULT CSourceSeeking::GetTimeFormat(__out GUID *pFormat)
{
CheckPointer(pFormat, E_POINTER);
*pFormat = TIME_FORMAT_MEDIA_TIME;
return S_OK;
}
HRESULT CSourceSeeking::GetDuration(__out LONGLONG *pDuration)
{
CheckPointer(pDuration, E_POINTER);
CAutoLock lock(m_pLock);
*pDuration = m_rtDuration;
return S_OK;
}
HRESULT CSourceSeeking::GetStopPosition(__out LONGLONG *pStop)
{
CheckPointer(pStop, E_POINTER);
CAutoLock lock(m_pLock);
*pStop = m_rtStop;
return S_OK;
}
HRESULT CSourceSeeking::GetCurrentPosition(__out LONGLONG *pCurrent)
{
// GetCurrentPosition is typically supported only in renderers and
// not in source filters.
return E_NOTIMPL;
}
HRESULT CSourceSeeking::GetCapabilities( __out DWORD * pCapabilities )
{
CheckPointer(pCapabilities, E_POINTER);
*pCapabilities = m_dwSeekingCaps;
return S_OK;
}
HRESULT CSourceSeeking::CheckCapabilities( __inout DWORD * pCapabilities )
{
CheckPointer(pCapabilities, E_POINTER);
// make sure all requested capabilities are in our mask
return (~m_dwSeekingCaps & *pCapabilities) ? S_FALSE : S_OK;
}
HRESULT CSourceSeeking::ConvertTimeFormat( __out LONGLONG * pTarget,
__in_opt const GUID * pTargetFormat,
LONGLONG Source,
__in_opt const GUID * pSourceFormat )
{
CheckPointer(pTarget, E_POINTER);
// format guids can be null to indicate current format
// since we only support TIME_FORMAT_MEDIA_TIME, we don't really
// offer any conversions.
if(pTargetFormat == 0 || *pTargetFormat == TIME_FORMAT_MEDIA_TIME)
{
if(pSourceFormat == 0 || *pSourceFormat == TIME_FORMAT_MEDIA_TIME)
{
*pTarget = Source;
return S_OK;
}
}
return E_INVALIDARG;
}
HRESULT CSourceSeeking::SetPositions( __inout_opt LONGLONG * pCurrent,
DWORD CurrentFlags,
__inout_opt LONGLONG * pStop,
DWORD StopFlags )
{
DWORD StopPosBits = StopFlags & AM_SEEKING_PositioningBitsMask;
DWORD StartPosBits = CurrentFlags & AM_SEEKING_PositioningBitsMask;
if(StopFlags) {
CheckPointer(pStop, E_POINTER);
// accept only relative, incremental, or absolute positioning
if(StopPosBits != StopFlags) {
return E_INVALIDARG;
}
}
if(CurrentFlags) {
CheckPointer(pCurrent, E_POINTER);
if(StartPosBits != AM_SEEKING_AbsolutePositioning &&
StartPosBits != AM_SEEKING_RelativePositioning) {
return E_INVALIDARG;
}
}
// scope for autolock
{
CAutoLock lock(m_pLock);
// set start position
if(StartPosBits == AM_SEEKING_AbsolutePositioning)
{
m_rtStart = *pCurrent;
}
else if(StartPosBits == AM_SEEKING_RelativePositioning)
{
m_rtStart += *pCurrent;
}
// set stop position
if(StopPosBits == AM_SEEKING_AbsolutePositioning)
{
m_rtStop = *pStop;
}
else if(StopPosBits == AM_SEEKING_IncrementalPositioning)
{
m_rtStop = m_rtStart + *pStop;
}
else if(StopPosBits == AM_SEEKING_RelativePositioning)
{
m_rtStop = m_rtStop + *pStop;
}
}
HRESULT hr = S_OK;
if(SUCCEEDED(hr) && StopPosBits) {
hr = ChangeStop();
}
if(StartPosBits) {
hr = ChangeStart();
}
return hr;
}
HRESULT CSourceSeeking::GetPositions( __out_opt LONGLONG * pCurrent, __out_opt LONGLONG * pStop )
{
if(pCurrent) {
*pCurrent = m_rtStart;
}
if(pStop) {
*pStop = m_rtStop;
}
return S_OK;;
}
HRESULT CSourceSeeking::GetAvailable( __out_opt LONGLONG * pEarliest, __out_opt LONGLONG * pLatest )
{
if(pEarliest) {
*pEarliest = 0;
}
if(pLatest) {
CAutoLock lock(m_pLock);
*pLatest = m_rtDuration;
}
return S_OK;
}
HRESULT CSourceSeeking::SetRate( double dRate)
{
{
CAutoLock lock(m_pLock);
m_dRateSeeking = dRate;
}
return ChangeRate();
}
HRESULT CSourceSeeking::GetRate( __out double * pdRate)
{
CheckPointer(pdRate, E_POINTER);
CAutoLock lock(m_pLock);
*pdRate = m_dRateSeeking;
return S_OK;
}
HRESULT CSourceSeeking::GetPreroll(__out LONGLONG *pPreroll)
{
CheckPointer(pPreroll, E_POINTER);
*pPreroll = 0;
return S_OK;
}
// --- CSourcePosition implementation ----------
CSourcePosition::CSourcePosition(__in_opt LPCTSTR pName,
__in_opt LPUNKNOWN pUnk,
__inout HRESULT* phr,
__in CCritSec * pLock) :
CMediaPosition(pName, pUnk),
m_pLock(pLock),
m_Start(CRefTime((LONGLONG)0))
{
m_Stop = _I64_MAX;
m_Rate = 1.0;
}
STDMETHODIMP
CSourcePosition::get_Duration(__out REFTIME * plength)
{
CheckPointer(plength,E_POINTER);
ValidateReadWritePtr(plength,sizeof(REFTIME));
CAutoLock lock(m_pLock);
*plength = m_Duration;
return S_OK;
}
STDMETHODIMP
CSourcePosition::put_CurrentPosition(REFTIME llTime)
{
m_pLock->Lock();
m_Start = llTime;
m_pLock->Unlock();
return ChangeStart();
}
STDMETHODIMP
CSourcePosition::get_StopTime(__out REFTIME * pllTime)
{
CheckPointer(pllTime,E_POINTER);
ValidateReadWritePtr(pllTime,sizeof(REFTIME));
CAutoLock lock(m_pLock);
*pllTime = m_Stop;
return S_OK;
}
STDMETHODIMP
CSourcePosition::put_StopTime(REFTIME llTime)
{
m_pLock->Lock();
m_Stop = llTime;
m_pLock->Unlock();
return ChangeStop();
}
STDMETHODIMP
CSourcePosition::get_PrerollTime(__out REFTIME * pllTime)
{
CheckPointer(pllTime,E_POINTER);
ValidateReadWritePtr(pllTime,sizeof(REFTIME));
return E_NOTIMPL;
}
STDMETHODIMP
CSourcePosition::put_PrerollTime(REFTIME llTime)
{
return E_NOTIMPL;
}
STDMETHODIMP
CSourcePosition::get_Rate(__out double * pdRate)
{
CheckPointer(pdRate,E_POINTER);
ValidateReadWritePtr(pdRate,sizeof(double));
CAutoLock lock(m_pLock);
*pdRate = m_Rate;
return S_OK;
}
STDMETHODIMP
CSourcePosition::put_Rate(double dRate)
{
m_pLock->Lock();
m_Rate = dRate;
m_pLock->Unlock();
return ChangeRate();
}
// By default we can seek forwards
STDMETHODIMP
CSourcePosition::CanSeekForward(__out LONG *pCanSeekForward)
{
CheckPointer(pCanSeekForward,E_POINTER);
*pCanSeekForward = OATRUE;
return S_OK;
}
// By default we can seek backwards
STDMETHODIMP
CSourcePosition::CanSeekBackward(__out LONG *pCanSeekBackward)
{
CheckPointer(pCanSeekBackward,E_POINTER);
*pCanSeekBackward = OATRUE;
return S_OK;
}
// --- Implementation of CBasicAudio class ----------
CBasicAudio::CBasicAudio(__in_opt LPCTSTR pName,__in_opt LPUNKNOWN punk) :
CUnknown(pName, punk)
{
}
// overriden to publicise our interfaces
STDMETHODIMP
CBasicAudio::NonDelegatingQueryInterface(REFIID riid, __deref_out void **ppv)
{
ValidateReadWritePtr(ppv,sizeof(PVOID));
if (riid == IID_IBasicAudio) {
return GetInterface( (IBasicAudio *) this, ppv);
} else {
return CUnknown::NonDelegatingQueryInterface(riid, ppv);
}
}
STDMETHODIMP
CBasicAudio::GetTypeInfoCount(__out UINT * pctinfo)
{
return m_basedisp.GetTypeInfoCount(pctinfo);
}
STDMETHODIMP
CBasicAudio::GetTypeInfo(
UINT itinfo,
LCID lcid,
__deref_out ITypeInfo ** pptinfo)
{
return m_basedisp.GetTypeInfo(
IID_IBasicAudio,
itinfo,
lcid,
pptinfo);
}
STDMETHODIMP
CBasicAudio::GetIDsOfNames(
REFIID riid,
__in_ecount(cNames) LPOLESTR * rgszNames,
UINT cNames,
LCID lcid,
__out_ecount(cNames) DISPID * rgdispid)
{
return m_basedisp.GetIDsOfNames(
IID_IBasicAudio,
rgszNames,
cNames,
lcid,
rgdispid);
}
STDMETHODIMP
CBasicAudio::Invoke(
DISPID dispidMember,
REFIID riid,
LCID lcid,
WORD wFlags,
__in DISPPARAMS * pdispparams,
__out_opt VARIANT * pvarResult,
__out_opt EXCEPINFO * pexcepinfo,
__out_opt UINT * puArgErr)
{
// this parameter is a dead leftover from an earlier interface
if (IID_NULL != riid) {
return DISP_E_UNKNOWNINTERFACE;
}
ITypeInfo * pti;
HRESULT hr = GetTypeInfo(0, lcid, &pti);
if (FAILED(hr)) {
return hr;
}
hr = pti->Invoke(
(IBasicAudio *)this,
dispidMember,
wFlags,
pdispparams,
pvarResult,
pexcepinfo,
puArgErr);
pti->Release();
return hr;
}
// --- IVideoWindow implementation ----------
CBaseVideoWindow::CBaseVideoWindow(__in_opt LPCTSTR pName,__in_opt LPUNKNOWN punk) :
CUnknown(pName, punk)
{
}
// overriden to publicise our interfaces
STDMETHODIMP
CBaseVideoWindow::NonDelegatingQueryInterface(REFIID riid, __deref_out void **ppv)
{
ValidateReadWritePtr(ppv,sizeof(PVOID));
if (riid == IID_IVideoWindow) {
return GetInterface( (IVideoWindow *) this, ppv);
} else {
return CUnknown::NonDelegatingQueryInterface(riid, ppv);
}
}
STDMETHODIMP
CBaseVideoWindow::GetTypeInfoCount(__out UINT * pctinfo)
{
return m_basedisp.GetTypeInfoCount(pctinfo);
}
STDMETHODIMP
CBaseVideoWindow::GetTypeInfo(
UINT itinfo,
LCID lcid,
__deref_out ITypeInfo ** pptinfo)
{
return m_basedisp.GetTypeInfo(
IID_IVideoWindow,
itinfo,
lcid,
pptinfo);
}
STDMETHODIMP
CBaseVideoWindow::GetIDsOfNames(
REFIID riid,
__in_ecount(cNames) LPOLESTR * rgszNames,
UINT cNames,
LCID lcid,
__out_ecount(cNames) DISPID * rgdispid)
{
return m_basedisp.GetIDsOfNames(
IID_IVideoWindow,
rgszNames,
cNames,
lcid,
rgdispid);
}
STDMETHODIMP
CBaseVideoWindow::Invoke(
DISPID dispidMember,
REFIID riid,
LCID lcid,
WORD wFlags,
__in DISPPARAMS * pdispparams,
__out_opt VARIANT * pvarResult,
__out_opt EXCEPINFO * pexcepinfo,
__out_opt UINT * puArgErr)
{
// this parameter is a dead leftover from an earlier interface
if (IID_NULL != riid) {
return DISP_E_UNKNOWNINTERFACE;
}
ITypeInfo * pti;
HRESULT hr = GetTypeInfo(0, lcid, &pti);
if (FAILED(hr)) {
return hr;
}
hr = pti->Invoke(
(IVideoWindow *)this,
dispidMember,
wFlags,
pdispparams,
pvarResult,
pexcepinfo,
puArgErr);
pti->Release();
return hr;
}
// --- IBasicVideo implementation ----------
CBaseBasicVideo::CBaseBasicVideo(__in_opt LPCTSTR pName,__in_opt LPUNKNOWN punk) :
CUnknown(pName, punk)
{
}
// overriden to publicise our interfaces
STDMETHODIMP
CBaseBasicVideo::NonDelegatingQueryInterface(REFIID riid, __deref_out void **ppv)
{
ValidateReadWritePtr(ppv,sizeof(PVOID));
if (riid == IID_IBasicVideo || riid == IID_IBasicVideo2) {
return GetInterface( static_cast<IBasicVideo2 *>(this), ppv);
} else {
return CUnknown::NonDelegatingQueryInterface(riid, ppv);
}
}
STDMETHODIMP
CBaseBasicVideo::GetTypeInfoCount(__out UINT * pctinfo)
{
return m_basedisp.GetTypeInfoCount(pctinfo);
}
STDMETHODIMP
CBaseBasicVideo::GetTypeInfo(
UINT itinfo,
LCID lcid,
__deref_out ITypeInfo ** pptinfo)
{
return m_basedisp.GetTypeInfo(
IID_IBasicVideo,
itinfo,
lcid,
pptinfo);
}
STDMETHODIMP
CBaseBasicVideo::GetIDsOfNames(
REFIID riid,
__in_ecount(cNames) LPOLESTR * rgszNames,
UINT cNames,
LCID lcid,
__out_ecount(cNames) DISPID * rgdispid)
{
return m_basedisp.GetIDsOfNames(
IID_IBasicVideo,
rgszNames,
cNames,
lcid,
rgdispid);
}
STDMETHODIMP
CBaseBasicVideo::Invoke(
DISPID dispidMember,
REFIID riid,
LCID lcid,
WORD wFlags,
__in DISPPARAMS * pdispparams,
__out_opt VARIANT * pvarResult,
__out_opt EXCEPINFO * pexcepinfo,
__out_opt UINT * puArgErr)
{
// this parameter is a dead leftover from an earlier interface
if (IID_NULL != riid) {
return DISP_E_UNKNOWNINTERFACE;
}
ITypeInfo * pti;
HRESULT hr = GetTypeInfo(0, lcid, &pti);
if (FAILED(hr)) {
return hr;
}
hr = pti->Invoke(
(IBasicVideo *)this,
dispidMember,
wFlags,
pdispparams,
pvarResult,
pexcepinfo,
puArgErr);
pti->Release();
return hr;
}
// --- Implementation of Deferred Commands ----------
CDispParams::CDispParams(UINT nArgs, __in_ecount(nArgs) VARIANT* pArgs, __inout_opt HRESULT *phr)
{
cNamedArgs = 0;
rgdispidNamedArgs = NULL;
cArgs = nArgs;
if (cArgs) {
rgvarg = new VARIANT[cArgs];
if (NULL == rgvarg) {
cArgs = 0;
if (phr) {
*phr = E_OUTOFMEMORY;
}
return;
}
for (UINT i = 0; i < cArgs; i++) {
// Why aren't we using VariantCopy?
VARIANT * pDest = &rgvarg[i];
VARIANT * pSrc = &pArgs[i];
pDest->vt = pSrc->vt;
switch(pDest->vt) {
case VT_I4:
pDest->lVal = pSrc->lVal;
break;
case VT_UI1:
pDest->bVal = pSrc->bVal;
break;
case VT_I2:
pDest->iVal = pSrc->iVal;
break;
case VT_R4:
pDest->fltVal = pSrc->fltVal;
break;
case VT_R8:
pDest->dblVal = pSrc->dblVal;
break;
case VT_BOOL:
pDest->boolVal = pSrc->boolVal;
break;
case VT_ERROR:
pDest->scode = pSrc->scode;
break;
case VT_CY:
pDest->cyVal = pSrc->cyVal;
break;
case VT_DATE:
pDest->date = pSrc->date;
break;
case VT_BSTR:
if ((PVOID)pSrc->bstrVal == NULL) {
pDest->bstrVal = NULL;
} else {
// a BSTR is a WORD followed by a UNICODE string.
// the pointer points just after the WORD
WORD len = * (WORD*) (pSrc->bstrVal - (sizeof(WORD) / sizeof(OLECHAR)));
OLECHAR* pch = new OLECHAR[len + (sizeof(WORD)/sizeof(OLECHAR))];
if (pch) {
WORD *pui = (WORD*)pch;
*pui = len;
pDest->bstrVal = pch + (sizeof(WORD)/sizeof(OLECHAR));
CopyMemory(pDest->bstrVal, pSrc->bstrVal, len*sizeof(OLECHAR));
} else {
cArgs = i;
if (phr) {
*phr = E_OUTOFMEMORY;
}
}
}
break;
case VT_UNKNOWN:
pDest->punkVal = pSrc->punkVal;
pDest->punkVal->AddRef();
break;
case VT_DISPATCH:
pDest->pdispVal = pSrc->pdispVal;
pDest->pdispVal->AddRef();
break;
default:
// a type we haven't got round to adding yet!
ASSERT(0);
break;
}
}
} else {
rgvarg = NULL;
}
}
CDispParams::~CDispParams()
{
for (UINT i = 0; i < cArgs; i++) {
switch(rgvarg[i].vt) {
case VT_BSTR:
// Explicitly cast BSTR to PVOID to tell code scanning tools we really mean to test the pointer
if ((PVOID)rgvarg[i].bstrVal != NULL) {
OLECHAR * pch = rgvarg[i].bstrVal - (sizeof(WORD)/sizeof(OLECHAR));
delete pch;
}
break;
case VT_UNKNOWN:
rgvarg[i].punkVal->Release();
break;
case VT_DISPATCH:
rgvarg[i].pdispVal->Release();
break;
}
}
delete[] rgvarg;
}
// lifetime is controlled by refcounts (see defer.h)
CDeferredCommand::CDeferredCommand(
__inout CCmdQueue * pQ,
__in_opt LPUNKNOWN pUnk,
__inout HRESULT * phr,
__in LPUNKNOWN pUnkExecutor,
REFTIME time,
__in GUID* iid,
long dispidMethod,
short wFlags,
long nArgs,
__in_ecount(nArgs) VARIANT* pDispParams,
__out VARIANT* pvarResult,
__out short* puArgErr,
BOOL bStream
) :
CUnknown(NAME("DeferredCommand"), pUnk),
m_pQueue(pQ),
m_pUnk(pUnkExecutor),
m_iid(iid),
m_dispidMethod(dispidMethod),
m_wFlags(wFlags),
m_DispParams(nArgs, pDispParams, phr),
m_pvarResult(pvarResult),
m_bStream(bStream),
m_hrResult(E_ABORT)
{
// convert REFTIME to REFERENCE_TIME
COARefTime convertor(time);
m_time = convertor;
// no check of time validity - it's ok to queue a command that's
// already late
// check iid is supportable on pUnk by QueryInterface for it
IUnknown * pInterface;
HRESULT hr = m_pUnk->QueryInterface(GetIID(), (void**) &pInterface);
if (FAILED(hr)) {
*phr = hr;
return;
}
pInterface->Release();
// !!! check dispidMethod and param/return types using typelib
ITypeInfo *pti;
hr = m_Dispatch.GetTypeInfo(*iid, 0, 0, &pti);
if (FAILED(hr)) {
*phr = hr;
return;
}
// !!! some sort of ITypeInfo validity check here
pti->Release();
// Fix up the dispid for put and get
if (wFlags == DISPATCH_PROPERTYPUT) {
m_DispParams.cNamedArgs = 1;
m_DispId = DISPID_PROPERTYPUT;
m_DispParams.rgdispidNamedArgs = &m_DispId;
}
// all checks ok - add to queue
hr = pQ->Insert(this);
if (FAILED(hr)) {
*phr = hr;
}
}
// refcounts are held by caller of InvokeAt... and by list. So if
// we get here, we can't be on the list
#if 0
CDeferredCommand::~CDeferredCommand()
{
// this assert is invalid since if the queue is deleted while we are
// still on the queue, we will have been removed by the queue and this
// m_pQueue will not have been modified.
// ASSERT(m_pQueue == NULL);
// we don't hold a ref count on pUnk, which is the object that should
// execute the command.
// This is because there would otherwise be a circular refcount problem
// since pUnk probably owns the CmdQueue object that has a refcount
// on us.
// The lifetime of pUnk is guaranteed by it being part of, or lifetime
// controlled by, our parent object. As long as we are on the list, pUnk
// must be valid. Once we are off the list, we do not use pUnk.
}
#endif
// overriden to publicise our interfaces
STDMETHODIMP
CDeferredCommand::NonDelegatingQueryInterface(REFIID riid, __out void **ppv)
{
ValidateReadWritePtr(ppv,sizeof(PVOID));
if (riid == IID_IDeferredCommand) {
return GetInterface( (IDeferredCommand *) this, ppv);
} else {
return CUnknown::NonDelegatingQueryInterface(riid, ppv);
}
}
// remove from q. this will reduce the refcount by one (since the q
// holds a count) but can't make us go away since he must have a
// refcount in order to call this method.
STDMETHODIMP
CDeferredCommand::Cancel()
{
if (m_pQueue == NULL) {
return VFW_E_ALREADY_CANCELLED;
}
HRESULT hr = m_pQueue->Remove(this);
if (FAILED(hr)) {
return hr;
}
m_pQueue = NULL;
return S_OK;
}
STDMETHODIMP
CDeferredCommand::Confidence(__out LONG* pConfidence)
{
return E_NOTIMPL;
}
STDMETHODIMP
CDeferredCommand::GetHResult(__out HRESULT * phrResult)
{
CheckPointer(phrResult,E_POINTER);
ValidateReadWritePtr(phrResult,sizeof(HRESULT));
if (m_pQueue != NULL) {
return E_ABORT;
}
*phrResult = m_hrResult;
return S_OK;
}
// set the time to be a new time (checking that it is valid) and
// then requeue
STDMETHODIMP
CDeferredCommand::Postpone(REFTIME newtime)
{
// check that this time is not past
// convert REFTIME to REFERENCE_TIME
COARefTime convertor(newtime);
// check that the time has not passed
if (m_pQueue->CheckTime(convertor, IsStreamTime())) {
return VFW_E_TIME_ALREADY_PASSED;
}
// extract from list
HRESULT hr = m_pQueue->Remove(this);
if (FAILED(hr)) {
return hr;
}
// change time
m_time = convertor;
// requeue
hr = m_pQueue->Insert(this);
return hr;
}
HRESULT
CDeferredCommand::Invoke()
{
// check that we are still outstanding
if (m_pQueue == NULL) {
return VFW_E_ALREADY_CANCELLED;
}
// get the type info
ITypeInfo* pti;
HRESULT hr = m_Dispatch.GetTypeInfo(GetIID(), 0, 0, &pti);
if (FAILED(hr)) {
return hr;
}
// qi for the expected interface and then invoke it. Note that we have to
// treat the returned interface as IUnknown since we don't know its type.
IUnknown* pInterface;
hr = m_pUnk->QueryInterface(GetIID(), (void**) &pInterface);
if (FAILED(hr)) {
pti->Release();
return hr;
}
EXCEPINFO expinfo;
UINT uArgErr;
m_hrResult = pti->Invoke(
pInterface,
GetMethod(),
GetFlags(),
GetParams(),
GetResult(),
&expinfo,
&uArgErr);
// release the interface we QI'd for
pInterface->Release();
pti->Release();
// remove from list whether or not successful
// or we loop indefinitely
hr = m_pQueue->Remove(this);
m_pQueue = NULL;
return hr;
}
// --- CCmdQueue methods ----------
CCmdQueue::CCmdQueue(__inout_opt HRESULT *phr) :
m_listPresentation(NAME("Presentation time command list")),
m_listStream(NAME("Stream time command list")),
m_evDue(TRUE, phr), // manual reset
m_dwAdvise(0),
m_pClock(NULL),
m_bRunning(FALSE)
{
}
CCmdQueue::~CCmdQueue()
{
// empty all our lists
// we hold a refcount on each, so traverse and Release each
// entry then RemoveAll to empty the list
POSITION pos = m_listPresentation.GetHeadPosition();
while(pos) {
CDeferredCommand* pCmd = m_listPresentation.GetNext(pos);
pCmd->Release();
}
m_listPresentation.RemoveAll();
pos = m_listStream.GetHeadPosition();
while(pos) {
CDeferredCommand* pCmd = m_listStream.GetNext(pos);
pCmd->Release();
}
m_listStream.RemoveAll();
if (m_pClock) {
if (m_dwAdvise) {
m_pClock->Unadvise(m_dwAdvise);
m_dwAdvise = 0;
}
m_pClock->Release();
}
}
// returns a new CDeferredCommand object that will be initialised with
// the parameters and will be added to the queue during construction.
// returns S_OK if successfully created otherwise an error and
// no object has been queued.
HRESULT
CCmdQueue::New(
__out CDeferredCommand **ppCmd,
__in LPUNKNOWN pUnk, // this object will execute command
REFTIME time,
__in GUID* iid,
long dispidMethod,
short wFlags,
long cArgs,
__in_ecount(cArgs) VARIANT* pDispParams,
__out VARIANT* pvarResult,
__out short* puArgErr,
BOOL bStream
)
{
CAutoLock lock(&m_Lock);
HRESULT hr = S_OK;
*ppCmd = NULL;
CDeferredCommand* pCmd;
pCmd = new CDeferredCommand(
this,
NULL, // not aggregated
&hr,
pUnk, // this guy will execute
time,
iid,
dispidMethod,
wFlags,
cArgs,
pDispParams,
pvarResult,
puArgErr,
bStream);
if (pCmd == NULL) {
hr = E_OUTOFMEMORY;
} else {
*ppCmd = pCmd;
}
return hr;
}
HRESULT
CCmdQueue::Insert(__in CDeferredCommand* pCmd)
{
CAutoLock lock(&m_Lock);
// addref the item
pCmd->AddRef();
CGenericList<CDeferredCommand> * pList;
if (pCmd->IsStreamTime()) {
pList = &m_listStream;
} else {
pList = &m_listPresentation;
}
POSITION pos = pList->GetHeadPosition();
// seek past all items that are before us
while (pos &&
(pList->GetValid(pos)->GetTime() <= pCmd->GetTime())) {
pList->GetNext(pos);
}
// now at end of list or in front of items that come later
if (!pos) {
pList->AddTail(pCmd);
} else {
pList->AddBefore(pos, pCmd);
}
SetTimeAdvise();
return S_OK;
}
HRESULT
CCmdQueue::Remove(__in CDeferredCommand* pCmd)
{
CAutoLock lock(&m_Lock);
HRESULT hr = S_OK;
CGenericList<CDeferredCommand> * pList;
if (pCmd->IsStreamTime()) {
pList = &m_listStream;
} else {
pList = &m_listPresentation;
}
POSITION pos = pList->GetHeadPosition();
// traverse the list
while (pos && (pList->GetValid(pos) != pCmd)) {
pList->GetNext(pos);
}
// did we drop off the end?
if (!pos) {
hr = VFW_E_NOT_FOUND;
} else {
// found it - now take off list
pList->Remove(pos);
// Insert did an AddRef, so release it
pCmd->Release();
// check that timer request is still for earliest time
SetTimeAdvise();
}
return hr;
}
// set the clock used for timing
HRESULT
CCmdQueue::SetSyncSource(__in_opt IReferenceClock* pClock)
{
CAutoLock lock(&m_Lock);
// addref the new clock first in case they are the same
if (pClock) {
pClock->AddRef();
}
// kill any advise on the old clock
if (m_pClock) {
if (m_dwAdvise) {
m_pClock->Unadvise(m_dwAdvise);
m_dwAdvise = 0;
}
m_pClock->Release();
}
m_pClock = pClock;
// set up a new advise
SetTimeAdvise();
return S_OK;
}
// set up a timer event with the reference clock
void
CCmdQueue::SetTimeAdvise(void)
{
// make sure we have a clock to use
if (!m_pClock) {
return;
}
// reset the event whenever we are requesting a new signal
m_evDue.Reset();
// time 0 is earliest
CRefTime current;
// find the earliest presentation time
POSITION pos = m_listPresentation.GetHeadPosition();
if (pos != NULL) {
current = m_listPresentation.GetValid(pos)->GetTime();
}
// if we're running, check the stream times too
if (m_bRunning) {
CRefTime t;
pos = m_listStream.GetHeadPosition();
if (NULL != pos) {
t = m_listStream.GetValid(pos)->GetTime();
// add on stream time offset to get presentation time
t += m_StreamTimeOffset;
// is this earlier?
if ((current == TimeZero) || (t < current)) {
current = t;
}
}
}
// need to change?
if ((current > TimeZero) && (current != m_tCurrentAdvise)) {
if (m_dwAdvise) {
m_pClock->Unadvise(m_dwAdvise);
// reset the event whenever we are requesting a new signal
m_evDue.Reset();
}
// ask for time advice - the first two params are either
// stream time offset and stream time or
// presentation time and 0. we always use the latter
HRESULT hr = m_pClock->AdviseTime(
(REFERENCE_TIME)current,
TimeZero,
(HEVENT) HANDLE(m_evDue),
&m_dwAdvise);
ASSERT(SUCCEEDED(hr));
m_tCurrentAdvise = current;
}
}
// switch to run mode. Streamtime to Presentation time mapping known.
HRESULT
CCmdQueue::Run(REFERENCE_TIME tStreamTimeOffset)
{
CAutoLock lock(&m_Lock);
m_StreamTimeOffset = tStreamTimeOffset;
m_bRunning = TRUE;
// ensure advise is accurate
SetTimeAdvise();
return S_OK;
}
// switch to Stopped or Paused mode. Time mapping not known.
HRESULT
CCmdQueue::EndRun()
{
CAutoLock lock(&m_Lock);
m_bRunning = FALSE;
// check timer setting - stream times
SetTimeAdvise();
return S_OK;
}
// return a pointer to the next due command. Blocks for msTimeout
// milliseconds until there is a due command.
// Stream-time commands will only become due between Run and Endrun calls.
// The command remains queued until invoked or cancelled.
// Returns E_ABORT if timeout occurs, otherwise S_OK (or other error).
//
// returns an AddRef'd object
HRESULT
CCmdQueue::GetDueCommand(__out CDeferredCommand ** ppCmd, long msTimeout)
{
// loop until we timeout or find a due command
for (;;) {
{
CAutoLock lock(&m_Lock);
// find the earliest command
CDeferredCommand * pCmd = NULL;
// check the presentation time and the
// stream time list to find the earliest
POSITION pos = m_listPresentation.GetHeadPosition();
if (NULL != pos) {
pCmd = m_listPresentation.GetValid(pos);
}
if (m_bRunning) {
pos = m_listStream.GetHeadPosition();
if (NULL != pos) {
CDeferredCommand* pStrm = m_listStream.GetValid(pos);
CRefTime t = pStrm->GetTime() + m_StreamTimeOffset;
if (!pCmd || (t < pCmd->GetTime())) {
pCmd = pStrm;
}
}
}
// if we have found one, is it due?
if (pCmd) {
if (CheckTime(pCmd->GetTime(), pCmd->IsStreamTime())) {
// yes it's due - addref it
pCmd->AddRef();
*ppCmd = pCmd;
return S_OK;
}
}
}
// block until the advise is signalled
if (WaitForSingleObject(m_evDue, msTimeout) != WAIT_OBJECT_0) {
return E_ABORT;
}
}
}
// return a pointer to a command that will be due for a given time.
// Pass in a stream time here. The stream time offset will be passed
// in via the Run method.
// Commands remain queued until invoked or cancelled.
// This method will not block. It will report E_ABORT if there are no
// commands due yet.
//
// returns an AddRef'd object
HRESULT
CCmdQueue::GetCommandDueFor(REFERENCE_TIME rtStream, __out CDeferredCommand**ppCmd)
{
CAutoLock lock(&m_Lock);
CRefTime tStream(rtStream);
// find the earliest stream and presentation time commands
CDeferredCommand* pStream = NULL;
POSITION pos = m_listStream.GetHeadPosition();
if (NULL != pos) {
pStream = m_listStream.GetValid(pos);
}
CDeferredCommand* pPresent = NULL;
pos = m_listPresentation.GetHeadPosition();
if (NULL != pos) {
pPresent = m_listPresentation.GetValid(pos);
}
// is there a presentation time that has passed already
if (pPresent && CheckTime(pPresent->GetTime(), FALSE)) {
pPresent->AddRef();
*ppCmd = pPresent;
return S_OK;
}
// is there a stream time command due before this stream time
if (pStream && (pStream->GetTime() <= tStream)) {
pStream->AddRef();
*ppCmd = pStream;
return S_OK;
}
// if we are running, we can map presentation times to
// stream time. In this case, is there a presentation time command
// that will be due before this stream time is presented?
if (m_bRunning && pPresent) {
// this stream time will appear at...
tStream += m_StreamTimeOffset;
// due before that?
if (pPresent->GetTime() <= tStream) {
*ppCmd = pPresent;
return S_OK;
}
}
// no commands due yet
return VFW_E_NOT_FOUND;
}
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