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windows-nt/Source/XPSP1/NT/enduser/netmeeting/av/nac/inscodec.cpp

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2020-09-26 03:20:57 -05:00
/*
- INSCODEC.CPP
-
* Microsoft NetMeeting
* Network Access Controller (NAC) DLL
* Installable codecs interfaces
*
* Revision History:
*
* When Who What
* -------- ------------------ ---------------------------------------
* 01.29.96 Yoram Yaacovi Created
*
* Functions:
* CInstallCodecs
* QueryInterface
* AddRef
* Release
* Initialize
* TranslateHr
* CInstallAudioCodecs
* QueryInterface
* AddRef
* Release
* AddACMFormat
* RemoveACMFormat
* ReorderFormats
* EnumFormats
* FreeBuffer
* CInstallVideoCodecs
* QueryInterface
* AddRef
* Release
* AddVCMFormat
* RemoveVCMFormat
* ReorderFormats
* EnumFormats
* FreeBuffer
* Public:
* Private:
* FreeBuffer
* External:
* CreateInstallCodecs
*
*
* @doc EXTERNAL
*
* Notes:
* @topic Implementation Notes | Below are some implementation notes.
*
* @devnote To add an audio or video format for use with NetMeeting, first obtain the
* appropriate interface by calling the COM CoCreateInstance, providing the desired
* interface (IInstallAudioCodecs or IInstallVideoCodecs). Then call the Add>CMFormat
* method on this interface to add a format, or Remove?CMFormat to remove one. Use
* the EnumFormats method to enumerate the list of formats known to NetMeeting, or
* ReorderFormats to make NetMeeting use these formats in a different priority order
* (see comment in the ReorderFormats description).
*
* @devnote When a vendor uses our API to add a codec format for use with NetMeeting,
* the information about this format is stored in the registry. Whenever we do
* an upgrade install of NetMeeting, we blow away these registry entry,
* together with all the standard registry entries. This is required to avoid
* incompatibility problems. This means that if a user installed a 3rd party codec,
* and then upgraded NetMeeting, he will have to re-add the custom codec.
*
*/
#include <precomp.h>
#include <confreg.h> // for setting NetMeeting to manual codec selection
#include <regentry.h> // for setting NetMeeting to manual codec selection
EXTERN_C int g_cICObjects=0;
EXTERN_C HANDLE g_hMutex=NULL;
class CInstallCodecs *g_pIC;
/***************************************************************************
CInstallCodecs
***************************************************************************/
/***************************************************************************
IUnknown Methods
***************************************************************************/
HRESULT CInstallCodecs::QueryInterface (REFIID riid, LPVOID *lppNewObj)
{
HRESULT hr = NOERROR;
DEBUGMSG(ZONE_INSTCODEC,("CInstallCodecs::QueryInterface\n"));
#ifdef DEBUG
// parameter validation
if (IsBadReadPtr(&riid, (UINT) sizeof(IID)))
{
hr = ResultFromScode(E_INVALIDARG);
goto out;
}
if (IsBadWritePtr(lppNewObj, sizeof(LPVOID)))
{
hr = ResultFromScode(E_INVALIDARG);
goto out;
}
#endif // DEBUG
*lppNewObj = 0;
if (riid == IID_IUnknown || riid == IID_IInstallCodecs)
*lppNewObj = (IInstallCodecs *) this;
else if (riid == IID_IInstallAudioCodecs)
*lppNewObj = (IInstallAudioCodecs *) &ifAudio;
else if (riid == IID_IInstallVideoCodecs)
*lppNewObj = (IInstallVideoCodecs *) &ifVideo;
else
{
hr = E_NOINTERFACE;
goto out;
}
((IUnknown *)*lppNewObj)->AddRef ();
out:
DEBUGMSG(ZONE_INSTCODEC,("CInstallCodecs::QueryInterface - leave, hr=0x%x\n", hr));
return hr;
}
ULONG CInstallCodecs::AddRef (void)
{
DEBUGMSG(ZONE_INSTCODEC,("CInstallCodecs::AddRef\n"));
InterlockedIncrement((long *) &m_cRef);
DEBUGMSG(ZONE_INSTCODEC,("CInstallCodecs::AddRef - leave, m_cRef=%d\n", m_cRef));
return m_cRef;
}
ULONG CInstallCodecs::Release (void)
{
DEBUGMSG(ZONE_INSTCODEC,("CInstallCodecs::Release\n"));
// if the cRef is already 0 (shouldn't happen), assert, but let it through
ASSERT(m_cRef);
if (InterlockedDecrement((long *) &m_cRef) == 0)
{
delete this;
}
DEBUGMSG(ZONE_INSTCODEC,("CInstallCodecs::Release - leave, m_cRef=%d\n", m_cRef));
return m_cRef;
}
/***************************************************************************
CInstallAudioCodecs
***************************************************************************/
/****************************************************************************
* @doc EXTERNAL COMPFUNC AUDIO
*
* @interface IInstallAudioCodecs | This interface provides methods for
* adding audio codec formats for use with NetMeeting, as well as
* removing these formats, enumerating them, and change their use order.
*
***************************************************************************/
/***************************************************************************
IUnknown Methods
Calling the containing object respective methods
***************************************************************************/
/****************************************************************************
*
* @method HRESULT | IInstallAudioCodecs | QueryInterface | QueryInterface
*
***************************************************************************/
HRESULT CInstallAudioCodecs::QueryInterface (REFIID riid, LPVOID *lppNewObj)
{
CInstallCodecs *This=IMPL(CInstallCodecs, ifAudio, this); // the containing object
DEBUGMSG(ZONE_INSTCODEC,("CInstallAudioCodecs::QueryInterface\n"));
DEBUGMSG(ZONE_INSTCODEC,("CInstallAudioCodecs::QueryInterface - leave\n"));
return (This->QueryInterface(riid, lppNewObj));
}
/****************************************************************************
*
* @method ULONG | IInstallAudioCodecs | AddRef | AddRef
*
***************************************************************************/
ULONG CInstallAudioCodecs::AddRef (void)
{
CInstallCodecs *This=IMPL(CInstallCodecs, ifAudio, this); // the containing object
DEBUGMSG(ZONE_INSTCODEC,("CInstallAudioCodecs::AddRef\n"));
DEBUGMSG(ZONE_INSTCODEC,("CInstallAudioCodecs::AddRef - leave\n"));
return (This->AddRef());
}
/****************************************************************************
*
* @method ULONG | IInstallAudioCodecs | Release | Release
*
***************************************************************************/
ULONG CInstallAudioCodecs::Release (void)
{
CInstallCodecs *This=IMPL(CInstallCodecs, ifAudio, this); // the containing object
DEBUGMSG(ZONE_INSTCODEC,("CInstallAudioCodecs::Release\n"));
DEBUGMSG(ZONE_INSTCODEC,("CInstallAudioCodecs::Release - leave\n"));
return (This->Release());
}
/****************************************************************************
*
* AddACMFormat
*
* @method HRESULT | IInstallAudioCodecs | AddACMFormat | Adds an ACM encoding
* format for use with NetMeeting
*
* @parm LPWAVEFORMATEX | lpwfx | Pointer to the WAVEFORMATEX structure of the
* format to add
*
* @parm PAUDCAP_INFO | pAudCapInfo | Additional format info that is not in the
* WAVEFORMATEX structure
*
* @rdesc Returns zero (NOERROR) if the function was successful. Otherwise, it returns
* a standard HRESULT, with the WIN32 facility code (7), or the specific facility
* code for installable codecs (0x301).
* Possible error codes:
* @flag E_INVALIDARG | Invalid argument
* @flag IC_E_NO_SUCH_FORMAT | The specified WAVEFORMATEX was not found with ACM.
* The format must be installed with ACM before it can be added for use
* with NetMeeting.
* @flag IC_E_INTERNAL_ERROR | the Network Audio/Video Controller
* reported a system error
*
***************************************************************************/
HRESULT CInstallAudioCodecs::AddACMFormat(LPWAVEFORMATEX lpwfx, PAUDCAP_INFO pAudCapInfo)
{
CInstallCodecs *This=IMPL(CInstallCodecs, ifAudio, this); // the containing object
HRESULT hr=NOERROR;
DEBUGMSG(ZONE_INSTCODEC,("CInstallAudioCodecs::AddACMFormat\n"));
/*
* Parameter validation
*/
// parameters
if (!lpwfx || !pAudCapInfo ||
IsBadReadPtr(lpwfx, (UINT) sizeof(WAVEFORMATEX)) ||
IsBadReadPtr(pAudCapInfo, (UINT) sizeof(AUDCAP_INFO)))
{
hr = E_INVALIDARG;
goto out;
}
// NAC doesn't like a nBlockAlign of 0
if (lpwfx->nBlockAlign == 0)
{
hr = E_INVALIDARG;
goto out;
}
// the format tags in the WAVEFORMAT and the AUDCAP_INFO should match
if (lpwfx->wFormatTag != pAudCapInfo->wFormatTag)
{
hr = E_INVALIDARG;
goto out;
}
// only supporting formats with one audio channel
if (lpwfx->nChannels != 1)
{
hr = E_INVALIDARG;
goto out;
}
/*
* Add the format
*/
// add
hr = This->m_pAudAppCaps->AddACMFormat(lpwfx, pAudCapInfo);
out:
if (FAILED(hr))
{
ERRORMSG(("CInstallAudioCodecs::AddACMFormat failed, hr=0x%x\n", hr));
}
DEBUGMSG(ZONE_INSTCODEC,("CInstallAudioCodecs::AddACMFormat - leave\n"));
return This->TranslateHr(hr);
}
/****************************************************************************
*
* RemoveACMFormat
*
* @method HRESULT | IInstallAudioCodecs | RemoveACMFormat | Removes an ACM
* format from the list of formats used by NetMeeting
*
* @parm LPWAVEFORMATEX | lpwfx | Pointer to the WAVEFORMATEX structure for the
* format to remove
*
* @rdesc Returns zero (NOERROR) if the function was successful. Otherwise, it returns
* a standard HRESULT, with the WIN32 facility code (0x7), or the specific facility
* code for installable codecs (0x301).
* Possible error codes:
* @flag E_INVALIDARG | Invalid argument
* @flag IC_E_NO_SUCH_FORMAT | The specified format was not found.
* @flag IC_E_INTERNAL_ERROR | the Network Audio/Video Controller
* reported a system error
*
***************************************************************************/
HRESULT CInstallAudioCodecs::RemoveACMFormat(LPWAVEFORMATEX lpwfx)
{
CInstallCodecs *This=IMPL(CInstallCodecs, ifAudio, this); // the containing object
HRESULT hr=NOERROR;
DEBUGMSG(ZONE_INSTCODEC,("CInstallAudioCodecs::RemoveACMFormat\n"));
/*
* Parameter validation
*/
if (!lpwfx ||
IsBadReadPtr(lpwfx, (UINT) sizeof(WAVEFORMATEX)))
{
hr = E_INVALIDARG;
goto out;
}
// NAC doesn't like a nBlockAlign of 0
if (lpwfx->nBlockAlign == 0)
{
hr = E_INVALIDARG;
goto out;
}
// only supporting formats with one audio channel
if (lpwfx->nChannels != 1)
{
hr = E_INVALIDARG;
goto out;
}
hr = This->m_pAudAppCaps->RemoveACMFormat(lpwfx);
out:
if (FAILED(hr))
{
ERRORMSG(("CInstallAudioCodecs::RemoveACMFormat failed, hr=0x%x\n", hr));
}
DEBUGMSG(ZONE_INSTCODEC,("CInstallAudioCodecs::RemoveACMFormat - leave\n"));
return This->TranslateHr(hr);
}
/****************************************************************************
*
* ReorderFormats
*
* @method HRESULT | IInstallAudioCodecs | ReorderFormats | Reorders the audio
* formats for use with Netmeeting
*
* @parm PAUDCAP_INFO_LIST | pAudCapInfoList | Pointer to a structure with a count
* and a pointer to a list of the formats to reorder. The list is of the
* format AUDCAP_INFO_LIST.
*
* @rdesc Returns zero (NOERROR) if the function was successful. Otherwise, it returns
* a standard HRESULT, with the WIN32 facility code (7), or the specific facility
* code for installable codecs (0x301).
* Possible error codes:
* @flag E_INVALIDARG | Invalid argument
* @flag IC_E_INTERNAL_ERROR | the Network Audio/Video Controller
* reported a system error
*
* @comm Since ReorderFormats can only reorder formats that are known to NetMeeting,
* it is recommended that the caller will first call EnumFormats, to get the
* of all formats known to NetMeeting, assign new sort indices (wSortIndex),
* and then call ReorderFormats with the modified list.
*
* @comm Arranging the formats in a specific order, by using ReorderFormats, does
* not guarantee that the top ranked formats will be used before lower ranked
* formats are used. For example, if the sending system is not capable of
* encoding a top ranked format, this format will not be used. The same
* will happen if the receiving system cannot decode this format.
*
***************************************************************************/
HRESULT CInstallAudioCodecs::ReorderFormats(PAUDCAP_INFO_LIST pAudCapInfoList)
{
CInstallCodecs *This=IMPL(CInstallCodecs, ifAudio, this); // the containing object
RegEntry re( AUDIO_KEY, HKEY_CURRENT_USER );
HRESULT hr=NOERROR;
DEBUGMSG(ZONE_INSTCODEC,("CInstallAudioCodecs::ReorderFormats\n"));
/*
* Parameter validation
*/
if (!pAudCapInfoList ||
IsBadReadPtr(pAudCapInfoList, sizeof(DWORD)) ||
IsBadReadPtr(pAudCapInfoList,
sizeof(AUDCAP_INFO_LIST) + ((pAudCapInfoList->cFormats-1) * sizeof(AUDCAP_INFO))))
{
hr = E_INVALIDARG;
goto out;
}
// fill in the format buffer here
hr = This->m_pAudAppCaps->ApplyAppFormatPrefs(pAudCapInfoList->aFormats,
pAudCapInfoList->cFormats);
if (FAILED(hr))
goto out;
/*
* switch NetMeeting to manual mode
*/
// set the registry. failing here won't fail ReorderFormats
re.SetValue(REGVAL_CODECCHOICE, CODECCHOICE_MANUAL);
out:
if (FAILED(hr))
{
ERRORMSG(("CInstallAudioCodecs::ReorderFormats failed, hr=0x%x\n", hr));
}
DEBUGMSG(ZONE_INSTCODEC,("CInstallAudioCodecs::ReorderFormats - leave\n"));
return This->TranslateHr(hr);
}
/****************************************************************************
*
* EnumFormats
*
* @method HRESULT | IInstallAudioCodecs | EnumFormats | Enumerates the audio
* codec formats known to NetMeeting
*
* @parm PAUDCAP_INFO_LIST * | ppAudCapInfoList | Address where this method
* will put a pointer to a AUDCAP_INFO_LIST list, where enumerated formats
* are listed.
*
* @rdesc Returns zero (NOERROR) if the function was successful. Otherwise, it returns
* a standard HRESULT, with the WIN32 facility code (7), or the specific facility
* code for installable codecs (0x301).
* Possible error codes:
* @flag E_INVALIDARG | Invalid argument
* @flag E_OUTOFMEMORY | Not enough memory for allocating the enumeration buffer
* @flag IC_E_NO_FORMATS | No formats were available to enumerate
* @flag IC_E_INTERNAL_ERROR | the Network Audio/Video Controller
* reported a system error
*
* @comm The caller is expected to free the returned list, by calling FreeBuffer
* on the same interface.
*
***************************************************************************/
HRESULT CInstallAudioCodecs::EnumFormats(PAUDCAP_INFO_LIST *ppAudCapInfoList)
{
CInstallCodecs *This=IMPL(CInstallCodecs, ifAudio, this); // the containing object
ULONG cFormats = 0;
UINT uBufSize = 0;
HRESULT hr=NOERROR;
DEBUGMSG(ZONE_INSTCODEC,("CInstallAudioCodecs::EnumFormats\n"));
/*
* Parameter validation
*/
if (!ppAudCapInfoList ||
IsBadWritePtr(ppAudCapInfoList, sizeof(PAUDCAP_INFO_LIST)))
{
hr = E_INVALIDARG;
goto out;
}
// nothing yet....
*ppAudCapInfoList = NULL;
// are there any formats ?
if (HR_FAILED(This->m_pAudAppCaps->GetNumFormats((UINT *) &cFormats)) ||
(cFormats == 0))
{
hr = IC_E_NO_FORMATS;
goto out;
}
// allocate a buffer for the call. the caller is expected to call
// FreeBuffer to free
// AUDCAP_INFO_LIST already includes one AUDCAP_INFO
uBufSize = sizeof(AUDCAP_INFO_LIST) + (cFormats-1) * sizeof(AUDCAP_INFO);
*ppAudCapInfoList = (PAUDCAP_INFO_LIST) MEMALLOC (uBufSize);
if (!(*ppAudCapInfoList))
{
hr = E_OUTOFMEMORY;
goto out;
}
hr = This->m_pAudAppCaps->EnumFormats((*ppAudCapInfoList)->aFormats, uBufSize,
(UINT *) &((*ppAudCapInfoList)->cFormats));
out:
if (FAILED(hr))
{
ERRORMSG(("CInstallAudioCodecs::EnumFormats failed, hr=0x%x\n", hr));
}
DEBUGMSG(ZONE_INSTCODEC,("CInstallAudioCodecs::EnumFormats - leave\n"));
return This->TranslateHr(hr);
}
/****************************************************************************
*
* FreeBuffer
*
* @method HRESULT | IInstallAudioCodecs | FreeBuffer | Free a buffer that was
* returned by the IInstallAudioCodec interface
*
* @parm LPVOID | lpBuffer | Address of the buffer to free. This buffer must have
* been allocated by one of the IInstallAudioCodecs methods
*
* @rdesc Returns zero (NOERROR) if the function was successful. Otherwise, it returns
* a standard HRESULT, with the WIN32 facility code (7), or the specific facility
* code for installable codecs (0x301).
* Possible error codes:
* None
*
***************************************************************************/
HRESULT CInstallAudioCodecs::FreeBuffer(LPVOID lpBuffer)
{
CInstallCodecs *This=IMPL(CInstallCodecs, ifAudio, this); // the containing object
HRESULT hr = NOERROR;
DEBUGMSG(ZONE_INSTCODEC,("CInstallAudioCodecs::FreeBuffer\n"));
hr = This->FreeBuffer(lpBuffer);
if (FAILED(hr))
{
ERRORMSG(("CInstallAudioCodecs::FreeBuffer failed, hr=0x%x\n", hr));
}
DEBUGMSG(ZONE_INSTCODEC,("CInstallAudioCodecs::FreeBuffer - leave, hr=0x%x\n", hr));
return This->TranslateHr(hr);
}
/***************************************************************************
CInstallVideoCodecs
***************************************************************************/
/****************************************************************************
* @doc EXTERNAL COMPFUNC VIDEO
***************************************************************************/
/***************************************************************************
IUnknown Methods
Calling the containing object respective methods
***************************************************************************/
/****************************************************************************
*
* @method HRESULT | IInstallVideoCodecs | QueryInterface | QueryInterface
*
***************************************************************************/
HRESULT CInstallVideoCodecs::QueryInterface (REFIID riid, LPVOID *lppNewObj)
{
CInstallCodecs *This=IMPL(CInstallCodecs, ifVideo, this); // the containing object
DEBUGMSG(ZONE_INSTCODEC,("CInstallVideoCodecs::QueryInterface\n"));
DEBUGMSG(ZONE_INSTCODEC,("CInstallVideoCodecs::QueryInterface - leave\n"));
return (This->QueryInterface(riid, lppNewObj));
}
/****************************************************************************
*
* @method ULONG | IInstallVideoCodecs | AddRef | AddRef
*
***************************************************************************/
ULONG CInstallVideoCodecs::AddRef (void)
{
CInstallCodecs *This=IMPL(CInstallCodecs, ifVideo, this); // the containing object
DEBUGMSG(ZONE_INSTCODEC,("CInstallVideoCodecs::AddRef\n"));
DEBUGMSG(ZONE_INSTCODEC,("CInstallVideoCodecs::AddRef - leave\n"));
return (This->AddRef());
}
/****************************************************************************
*
* @method ULONG | IInstallVideoCodecs | Release | Release
*
***************************************************************************/
ULONG CInstallVideoCodecs::Release (void)
{
CInstallCodecs *This=IMPL(CInstallCodecs, ifVideo, this); // the containing object
DEBUGMSG(ZONE_INSTCODEC,("CInstallVideoCodecs::Release\n"));
DEBUGMSG(ZONE_INSTCODEC,("CInstallVideoCodecs::Release - leave\n"));
return (This->Release());
}
/****************************************************************************
*
* AddVCMFormat
*
* @method HRESULT | IInstallVideoCodecs | AddVCMFormat | Adds an video encoding
* format for use with NetMeeting
*
* @parm PAUDCAP_INFO | pVidCapInfo | Information on the format to add
*
* @rdesc Returns zero (NOERROR) if the function was successful. Otherwise, it returns
* a standard HRESULT, with the WIN32 facility code (7), or the specific facility
* code for installable codecs (0x301).
* Possible error codes:
* @flag E_INVALIDARG | Invalid argument
* @flag IC_E_NO_SUCH_FORMAT | The specified format was not found. The format
* must be installed with Video For Windows before it can be added for use
* with NetMeeting.
* @flag IC_E_INTERNAL_ERROR | the Network Audio/Video Controller
* reported a system error
*
***************************************************************************/
HRESULT CInstallVideoCodecs::AddVCMFormat(PVIDCAP_INFO pVidCapInfo)
{
CInstallCodecs *This=IMPL(CInstallCodecs, ifVideo, this); // the containing object
HRESULT hr=NOERROR;
DEBUGMSG(ZONE_INSTCODEC,("CInstallVideoCodecs::AddVCMFormat\n"));
/*
* Add the format
*/
hr = AddRemoveVCMFormat(pVidCapInfo, TRUE);
if (FAILED(hr))
{
ERRORMSG(("CInstallVideoCodecs::AddVCMFormat failed, hr=0x%x\n", hr));
}
DEBUGMSG(ZONE_INSTCODEC,("CInstallVideoCodecs::AddVCMFormat - leave\n"));
return This->TranslateHr(hr);
}
/****************************************************************************
*
* RemoveVCMFormat
*
* @method HRESULT | IInstallVideoCodecs | RemoveVCMFormat | Removes an video
* format from the list of formats used by NetMeeting
*
* @parm PVIDCAP_INFO | pVidCapInfo | Pointer to the PVIDCAP_INFO structure
* describing the format to remove
*
* @rdesc Returns zero (NOERROR) if the function was successful. Otherwise, it returns
* a standard HRESULT, with the WIN32 facility code (0x7), or the specific facility
* code for installable codecs (0x301).
* Possible error codes:
* @flag E_INVALIDARG | Invalid argument
* @flag IC_E_NO_SUCH_FORMAT | The specified format was not found.
* @flag IC_E_INTERNAL_ERROR | the Network Audio/Video Controller
* reported a system error
*
***************************************************************************/
HRESULT CInstallVideoCodecs::RemoveVCMFormat(PVIDCAP_INFO pVidCapInfo)
{
CInstallCodecs *This=IMPL(CInstallCodecs, ifVideo, this); // the containing object
HRESULT hr=NOERROR;
DEBUGMSG(ZONE_INSTCODEC,("CInstallVideoCodecs::RemoveVCMFormat\n"));
/*
* Remove the format
*/
hr = AddRemoveVCMFormat(pVidCapInfo, FALSE);
if (FAILED(hr))
{
ERRORMSG(("CInstallVideoCodecs::RemoveVCMFormat failed, hr=0x%x\n", hr));
}
DEBUGMSG(ZONE_INSTCODEC,("CInstallVideoCodecs::RemoveVCMFormat - leave\n"));
return This->TranslateHr(hr);
}
/****************************************************************************
*
* ReorderFormats
*
* @method HRESULT | IInstallVideoCodecs | ReorderFormats | Reorders the video
* formats for use with Netmeeting
*
* @parm PVIDCAP_INFO_LIST | pVidCapInfoList | Pointer to a structure with a count
* and a pointer to a list of the formats to reorder. The list is of the
* format VIDCAP_INFO_LIST.
*
* @rdesc Returns zero (NOERROR) if the function was successful. Otherwise, it returns
* a standard HRESULT, with the WIN32 facility code (7), or the specific facility
* code for installable codecs (0x301).
* Possible error codes:
* @flag E_INVALIDARG | Invalid argument
* @flag IC_E_INTERNAL_ERROR | the Network Audio/Video Controller
* reported a system error
*
* @comm Since ReorderFormats can only reorder formats that are known to NetMeeting,
* it is recommended that the caller will first call EnumFormats, to get the
* of all formats known to NetMeeting, assign new sort indices (wSortIndex),
* and then call ReorderFormats with the modified list.
*
* @comm Arranging the formats in a specific order, by using ReorderFormats, does
* not guarantee that the top ranked formats will be used before lower ranked
* formats are used. For example, if the sending system is not capable of
* encoding a top ranked format, this format will not be used. The same
* will happen if the receiving system cannot decode this format.
*
***************************************************************************/
HRESULT CInstallVideoCodecs::ReorderFormats(PVIDCAP_INFO_LIST pVidCapInfoList)
{
CInstallCodecs *This=IMPL(CInstallCodecs, ifVideo, this); // the containing object
HRESULT hr=NOERROR;
DEBUGMSG(ZONE_INSTCODEC,("CInstallVideoCodecs::ReorderFormats\n"));
/*
* Parameter validation
*/
if (!pVidCapInfoList ||
IsBadReadPtr(pVidCapInfoList, sizeof(DWORD)) ||
IsBadReadPtr(pVidCapInfoList,
sizeof(VIDCAP_INFO_LIST) + ((pVidCapInfoList->cFormats-1) * sizeof(VIDCAP_INFO))))
{
hr = E_INVALIDARG;
goto out;
}
hr = This->m_pVidAppCaps->ApplyAppFormatPrefs(pVidCapInfoList->aFormats,
pVidCapInfoList->cFormats);
out:
if (FAILED(hr))
{
ERRORMSG(("CInstallVideoCodecs::ReorderFormats failed, hr=0x%x\n", hr));
}
DEBUGMSG(ZONE_INSTCODEC,("CInstallVideoCodecs::ReorderFormats - leave\n"));
return This->TranslateHr(hr);
}
/****************************************************************************
*
* EnumFormats
*
* @method HRESULT | IInstallVideoCodecs | EnumFormats | Enumerates the video
* codec formats known to NetMeeting
*
* @parm PVIDCAP_INFO_LIST * | ppVidCapInfoList | Address where this method
* will put a pointer to a VIDCAP_INFO_LIST list, where enumerated formats
* are listed.
*
* @rdesc Returns zero (NOERROR) if the function was successful. Otherwise, it returns
* a standard HRESULT, with the WIN32 facility code (7), or the specific facility
* code for installable codecs (0x301).
* Possible error codes:
* @flag E_INVALIDARG | Invalid argument
* @flag E_OUTOFMEMORY | Not enough memory for allocating the enumeration buffer
* @flag IC_E_NO_FORMATS | No formats were available to enumerate
* @flag IC_E_INTERNAL_ERROR | the Network Audio/Video Controller
* reported a system error
*
* @comm The caller is expected to free the returned list, by calling FreeBuffer
* on the same interface.
*
***************************************************************************/
HRESULT CInstallVideoCodecs::EnumFormats(PVIDCAP_INFO_LIST *ppVidCapInfoList)
{
CInstallCodecs *This=IMPL(CInstallCodecs, ifVideo, this); // the containing object
ULONG cFormats = 0;
UINT uBufSize = 0;
HRESULT hr=NOERROR;
DEBUGMSG(ZONE_INSTCODEC,("CInstallVideoCodecs::EnumFormats\n"));
/*
* Parameter validation
*/
if (!ppVidCapInfoList ||
IsBadWritePtr(ppVidCapInfoList, sizeof(PVIDCAP_INFO_LIST)))
{
hr = E_INVALIDARG;
goto out;
}
// nothing yet....
*ppVidCapInfoList = NULL;
// are there any formats ?
if (HR_FAILED(This->m_pVidAppCaps->GetNumFormats((UINT *) &cFormats)) ||
(cFormats == 0))
{
hr = IC_E_NO_FORMATS;
goto out;
}
// allocate a buffer for the call. the caller is expected to call
// FreeBuffer to free
// VIDCAP_INFO_LIST already includes one VIDCAP_INFO
uBufSize = sizeof(VIDCAP_INFO_LIST) + (cFormats-1) * sizeof(VIDCAP_INFO);
*ppVidCapInfoList = (PVIDCAP_INFO_LIST) MEMALLOC (uBufSize);
if (!(*ppVidCapInfoList))
{
hr = E_OUTOFMEMORY;
goto out;
}
hr = This->m_pVidAppCaps->EnumFormats((*ppVidCapInfoList)->aFormats, uBufSize,
(UINT *) &((*ppVidCapInfoList)->cFormats));
out:
if (FAILED(hr))
{
ERRORMSG(("CInstallVideoCodecs::EnumFormats failed, hr=0x%x\n", hr));
}
DEBUGMSG(ZONE_INSTCODEC,("CInstallVideoCodecs::EnumFormats - leave\n"));
return This->TranslateHr(hr);
}
/****************************************************************************
*
* FreeBuffer
*
* @method HRESULT | IInstallVideoCodecs | FreeBuffer | Free a buffer that was
* returned by the IInstallVideoCodec interface
*
* @parm LPVOID | lpBuffer | Address of the buffer to free. This buffer must have
* been allocated by one of the IInstallVideoCodecs methods
*
* @rdesc Returns zero (NOERROR) if the function was successful. Otherwise, it returns
* a standard HRESULT, with the WIN32 facility code (7), or the specific facility
* code for installable codecs (0x301).
* Possible error codes:
* None
*
***************************************************************************/
HRESULT CInstallVideoCodecs::FreeBuffer(LPVOID lpBuffer)
{
CInstallCodecs *This=IMPL(CInstallCodecs, ifVideo, this); // the containing object
HRESULT hr = NOERROR;
DEBUGMSG(ZONE_INSTCODEC,("CInstallVideoCodecs::FreeBuffer\n"));
hr = This->FreeBuffer(lpBuffer);
if (FAILED(hr))
{
ERRORMSG(("CInstallVideoCodecs::FreeBuffer failed, hr=0x%x\n", hr));
}
DEBUGMSG(ZONE_INSTCODEC,("CInstallVideoCodecs::FreeBuffer - leave, hr=0x%x\n", hr));
return This->TranslateHr(hr);
}
/****************************************************************************
* @doc INTERNAL COMPFUNC
***************************************************************************/
/****************************************************************************
*
* AddRemoveVCMFormat
*
* @method HRESULT | IInstallVideoCodecs | AddRemoveVCMFormat | Adds or
* removes a VCM format for use with NetMeeting
*
* @parm PAUDCAP_INFO | pVidCapInfo | Information on the format to add/remove
*
* @parm BOOL | bAdd | TRUE = Add the format, FALSE = Remove the format
*
* @rdesc Returns zero (NOERROR) if the function was successful. Otherwise, it returns
* a standard HRESULT, with the WIN32 facility code (7), or the specific facility
* code for installable codecs (0x301).
* Possible error codes:
* @flag E_INVALIDARG | Invalid argument
* @flag IC_E_NO_SUCH_FORMAT | The specified format was not found. The format
* must be installed with Video For Windows before it can be added for use
* with NetMeeting.
* @flag IC_E_INTERNAL_ERROR | the Network Audio/Video Controller
* reported a system error
*
***************************************************************************/
HRESULT CInstallVideoCodecs::AddRemoveVCMFormat(PVIDCAP_INFO pVidCapInfo,
BOOL bAdd)
{
CInstallCodecs *This=IMPL(CInstallCodecs, ifVideo, this); // the containing object
VIDEOFORMATEX vfx;
HRESULT hr=NOERROR;
DEBUGMSG(ZONE_INSTCODEC,("CInstallVideoCodecs::AddVCMFormat\n"));
/*
* Parameter validation
*/
if (!pVidCapInfo ||
IsBadReadPtr(pVidCapInfo, (UINT) sizeof(VIDCAP_INFO)))
{
hr = E_INVALIDARG;
goto out;
}
// some fields should not be zero
if ((pVidCapInfo->uFrameRate == 0) ||
(pVidCapInfo->uAvgBitrate == 0) ||
((pVidCapInfo->dwBitsPerSample == 0) &&
(pVidCapInfo->bih.biBitCount == 0)))
{
hr = E_INVALIDARG;
goto out;
}
// make sure dwBitsPerSample and biBitCount match
if (pVidCapInfo->dwBitsPerSample == 0)
pVidCapInfo->dwBitsPerSample = pVidCapInfo->bih.biBitCount;
if (pVidCapInfo->bih.biBitCount == 0)
pVidCapInfo->bih.biBitCount = LOWORD(pVidCapInfo->dwBitsPerSample);
if (LOWORD(pVidCapInfo->dwBitsPerSample) != pVidCapInfo->bih.biBitCount)
{
hr = E_INVALIDARG;
goto out;
}
/*
* Make a VIDEOFORMATEX structure
*/
RtlZeroMemory((PVOID) &vfx, sizeof(VIDEOFORMATEX));
// Make sure it's Upper Case
if (pVidCapInfo->dwFormatTag > 256)
CharUpperBuff((LPTSTR)&pVidCapInfo->dwFormatTag, sizeof(DWORD));
vfx.dwFormatTag = pVidCapInfo->dwFormatTag;
vfx.nSamplesPerSec = pVidCapInfo->uFrameRate;
vfx.wBitsPerSample = pVidCapInfo->dwBitsPerSample; // wBitPerSample is a DWORD
vfx.nAvgBytesPerSec = pVidCapInfo->uAvgBitrate;
RtlCopyMemory(&vfx.bih, &pVidCapInfo->bih, sizeof(BITMAPINFOHEADER));
/*
* Add or remove the format
*/
if (bAdd)
hr = This->m_pVidAppCaps->AddVCMFormat(&vfx, pVidCapInfo);
else
hr = This->m_pVidAppCaps->RemoveVCMFormat(&vfx);
out:
DEBUGMSG(ZONE_INSTCODEC,("CInstallVideoCodecs::AddRemoveVCMFormat - leave\n"));
return This->TranslateHr(hr);
}
/***************************************************************************
Name : CInstallCodecs::CInstallCodecs
Purpose : The CInstallCodecs object constructor
Parameters: none
Returns : None
Comment :
***************************************************************************/
inline CInstallCodecs::CInstallCodecs (void)
{
m_cRef = 0; // will be bumped to 1 by the explicit QI in the create function
m_pAudAppCaps = NULL;
m_pVidAppCaps = NULL;
// can't use ++ because RISC processors may translate to several instructions
InterlockedIncrement((long *) &g_cICObjects);
}
/***************************************************************************
Name : CInstallCodecs::~CInstallCodecs
Purpose : The CInstallCodecs object destructor
Parameters: none
Returns : None
Comment :
***************************************************************************/
inline CInstallCodecs::~CInstallCodecs (void)
{
// let the caps interfaces and objects go
if (m_pAudAppCaps)
m_pAudAppCaps->Release();
if (m_pVidAppCaps)
m_pVidAppCaps->Release();
// can't use ++ because RISC processors may translate to several instructions
if (!InterlockedDecrement((long *) &g_cICObjects))
{
if (g_hMutex)
CloseHandle(g_hMutex);
g_hMutex = NULL;
}
g_pIC = (CInstallCodecs *)NULL;
}
/***************************************************************************
Name : CInstallCodecs::FreeBuffer
Purpose : Frees a buffer allocated by the the installable codecs interfaces.
Parameters: lpBuffer - a pointer to the buffer to free. This buffer must
have been allocated by installable codecs interfaces
Returns : HRESULT
Comment :
***************************************************************************/
HRESULT CInstallCodecs::FreeBuffer(LPVOID lpBuffer)
{
HRESULT hr = NOERROR;
DEBUGMSG(ZONE_INSTCODEC,("CInstallCodecs::FreeBuffer\n"));
if (lpBuffer)
MEMFREE(lpBuffer);
DEBUGMSG(ZONE_INSTCODEC,("CInstallCodecs::FreeBuffer - leave, hr=0x%x\n", hr));
return TranslateHr(hr);
}
/***************************************************************************
Name : CInstallCodecs::TranslateHr
Purpose : Translates an HRESULT to an external installable codecs value
Parameters: hr - [in] the HRESULT value to translate
Returns : HRESULT - the translated value
Comment :
***************************************************************************/
HRESULT CInstallCodecs::TranslateHr(HRESULT hr)
{
switch (hr)
{
case CAPS_E_NOMATCH:
hr = IC_E_NO_SUCH_FORMAT;
break;
case CAPS_E_INVALID_PARAM:
hr = E_INVALIDARG;
break;
case CAPS_E_SYSTEM_ERROR:
hr = IC_E_INTERNAL_ERROR;
break;
default:
break;
}
return hr;
}
/****************************************************************************
*
* Initialize
*
* @func HRESULT | Initialize | Initializes the CinstallCodecs object
*
* @parm REFIID | riid | Reference to the identifier of the interface
*
* @rdesc Returns zero (NOERROR) if the function was successful. Otherwise, it returns
* a standard HRESULT, with the WIN32 facility code (7), or the specific facility
* code for installable codecs (0x301).
* Possible error codes:
* @flag E_INVALIDARG | Invalid argument
* @flag E_OUTOFMEMORY | Not enough memory for creating the object
* @flag IC_E_CAPS_INSTANTIATION_FAILURE | Could not instantiate a capability object
* @flag IC_E_CAPS_INITIALIZATION_FAILURE | Could not initialize a capability object
*
***************************************************************************/
HRESULT CInstallCodecs::Initialize(REFIID riid)
{
HRESULT hr=NOERROR;
CMsiaCapability *pAudCapObj = NULL;
CMsivCapability *pVidCapObj = NULL;
/*
* Instantiate
*/
ACQMUTEX(g_hMutex);
/*
* Audio
*/
if ((riid == IID_IInstallAudioCodecs) &&
!m_pAudAppCaps)
{
// instantiate the audio capability object
DBG_SAVE_FILE_LINE
pAudCapObj = new CMsiaCapability;
if (!pAudCapObj)
{
hr = IC_E_CAPS_INSTANTIATION_FAILURE;
goto out;
}
// get an appcap interface on the capability objects
// this interface will be used for most calls
hr = pAudCapObj->QueryInterface(IID_IAppAudioCap, (void **)&m_pAudAppCaps);
if(!HR_SUCCEEDED(hr))
{
hr = IC_E_CAPS_INSTANTIATION_FAILURE;
goto out;
}
pAudCapObj->Release(); // this balances the refcount of "new CMsiaCapability"
// initialize the capability objects
if (!(pAudCapObj->Init()))
{
hr = IC_E_CAPS_INITIALIZATION_FAILURE;
goto out;
}
}
/*
* Video
*/
if ((riid == IID_IInstallVideoCodecs) &&
!m_pVidAppCaps)
{
// instantiate the video capability object
DBG_SAVE_FILE_LINE
pVidCapObj = new CMsivCapability;
if (!pVidCapObj)
{
hr = IC_E_CAPS_INSTANTIATION_FAILURE;
goto out;
}
// get an appcap interface on the capability objects
// this interface will be used for most calls
hr = pVidCapObj->QueryInterface(IID_IAppVidCap, (void **)&m_pVidAppCaps);
if(!HR_SUCCEEDED(hr))
{
hr = IC_E_CAPS_INSTANTIATION_FAILURE;
goto out;
}
pVidCapObj->Release(); // this balances the refcount of "new CMsivCapability"
if (!(pVidCapObj->Init()))
{
hr = IC_E_CAPS_INITIALIZATION_FAILURE;
goto out;
}
}
out:
if (FAILED(hr))
{
ERRORMSG(("CInstallCodecs::Initialize failed, hr=0x%x\n", hr));
}
RELMUTEX(g_hMutex);
return TranslateHr(hr);
}
/****************************************************************************
* @doc EXTERNAL COMPFUNC
***************************************************************************/
/****************************************************************************
*
* CreateInstallCodecs
*
* @func HRESULT | CreateInstallCodecs | Creates an instance of the CInstallCodecs
* object, and returns the requested interface. This function should only be
* called indirectly through CoCreateInstance.
* @parm LPUNKNOWN | punkOuter | Pointer to whether object is or isn<EFBFBD>t part
* of an aggregate
*
* @parm REFIID | riid | Reference to the identifier of the interface
*
* @parm LPVOID * | ppv | Indirect pointer to requested interface
*
* @rdesc Returns zero (NOERROR) if the function was successful. Otherwise, it returns
* a standard HRESULT, with the WIN32 facility code (7), or the specific facility
* code for installable codecs (0x301).
* Possible error codes:
* @flag E_INVALIDARG | Invalid argument
* @flag E_OUTOFMEMORY | Not enough memory for creating the object
* @flag CLASS_E_NOAGGREGATION | Aggregation is not supported for this object
* @flag IC_E_CAPS_INSTANTIATION_FAILURE | Could not instantiate a capability object
* @flag IC_E_CAPS_INITIALIZATION_FAILURE | Could not initialize a capability object
*
* @comm CreateInstallCodecs should not be called directly. Clients of installable
* codecs should use the COM CoCreateInstance to instantiate the object, expecting
* the same return values.
*
***************************************************************************/
extern "C" HRESULT WINAPI CreateInstallCodecs ( IUnknown *pUnkOuter,
REFIID riid,
void **ppv)
{
CInstallCodecs *pIC;
HRESULT hr = NOERROR;
*ppv = 0;
if (pUnkOuter)
{
hr = CLASS_E_NOAGGREGATION;
goto out;
}
/*
* instantiate the object
*/
// create a mutex to control access to QoS object data
//
// NOTE: I'm taking some chance here: the code that creates the mutex must be
// executed by one thread at a time, so it should really be in the PROCESS_ATTACH
// for NAC.DLL. However, since this code is expected to be called rarely, and in
// order not to add code to the NAC load time, I put it here.
if (!g_hMutex)
{
g_hMutex = CreateMutex(NULL, FALSE, NULL);
ASSERT(g_hMutex);
if (!g_hMutex)
{
ERRORMSG(("CreateInstallCodecs: CreateMutex failed, 0x%x\n", GetLastError()));
hr = E_FAIL;
goto out;
}
}
ACQMUTEX(g_hMutex);
// only instantiate a new object if it doesn't already exist
if (!g_pIC)
{
DBG_SAVE_FILE_LINE
if (!(pIC = new CInstallCodecs))
{
hr = E_OUTOFMEMORY;
RELMUTEX(g_hMutex);
goto out;
}
// Save pointer
g_pIC = pIC;
}
else
{
// this is the case when the object was already instantiaed in this
// process, so we only want to return the object pointer.
pIC = g_pIC;
}
// always initialize the object. Initialize will only initialize what
// is not yet initialized
hr = pIC->Initialize(riid);
RELMUTEX(g_hMutex);
// get the requested interface for the caller
if (pIC)
{
// QueryInterface will get us the interface pointer and will AddRef
// the object
hr = pIC->QueryInterface (riid, ppv);
}
else
hr = E_FAIL;
out:
if (FAILED(hr))
{
ERRORMSG(("CreateInstallCodecs failed, hr=0x%x\n", hr));
}
return hr;
}
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