受保護的使用者模式音訊 (PUMA)
Windows Vista 引進了受保護的使用者模式音訊 (PUMA),受保護環境 (PE) 中的使用者模式音訊引擎,為音訊處理和轉譯提供更安全的環境。 它只允許啟用可接受的音訊輸出,並確保輸出能可靠地停用。 如需PUMA的詳細資訊,請參閱 輸出內容保護和 Windows Vista。
PUMA 已針對 Windows 7 更新,以提供下列功能:
- 在 S/PDIF 端點上設定序列複製管理系統 (SCMS) 位,以及在高定義多媒體介面 (HDMI) 端點上設定高頻寬數位內容保護 (HDCP) 位。
- 在受保護的環境外啟用 SCMS 和 HDMI 保護控件。
音訊驅動程式中的DRM保護
數字版權管理 (DRM) 可讓您將媒體數據封裝在安全容器中,並將使用規則附加至內容。 例如,內容提供者可能會使用 「複製保護 」或 「數字輸出停用 」來停用計算機系統的直接數位副本或傳輸。
特定Microsoft產品的音訊堆棧可藉由實作控管音訊內容的播放使用規則,以支援DRM。 若要播放受保護的內容,基礎音訊驅動程式必須是 受信任的驅動程式;也就是說,驅動程式必須經過DRMLevel 1300標誌認證。 如需開發受信任驅動程式的相關信息,您可以使用 Windows 2000 驅動程式開發工具包 (“DDK”) 或更新版本中定義的介面。 使用 DDK 開發的驅動程式將會實作DRM所需的介面。 如需詳細資訊,請參閱 數位版權管理。
若要轉譯受保護的內容,受信任的驅動程式必須檢查是否在流經音訊堆疊的內容上設定複製保護和數位輸出停用,並據以響應設定。
複製保護規則
複製保護 表示系統上不允許直接數位副本。 在內容上設定複製保護時,WHQL 測試合約的展示 B 已更新,以反映驅動程式的新期望和需求。 針對 Windows 7,內建的 HD 音訊類別驅動程式符合最新的需求。
除了確保不允許將內容傳遞至另一個元件,或儲存在DRM系統未驗證的任何非大量儲存媒體上,音訊驅動程式會在設定複製保護時執行下列工作:
- 驅動程式會在 HDMI 端點上啟用 HDCP。
- 針對 S/PDIF 介面,驅動程式會驗證 L、Cp 和類別代碼位的組合表示 SCMS 狀態為「永遠複製」,如 IEC 60958 中所定義。
- L 位設定為 0,類別代碼設定為 「數位訊號混音器」。
受信任的音訊驅動程式所使用的DRMRIGHTS結構會指定指派給 KS 音訊釘選或埠類別驅動程式資料流物件的DRM內容許可權。 CopyProtect 成員會指出是否在音訊內容上設定複製保護。
針對 Windows 7,使用 CopyProtect 會更嚴格。 驅動程式可確保在音訊介面上設定保護控件、針對 HDMI 輸出設定 HDCP,並將 SCMS 設定為 S/PDIF 輸出,方法是將狀態設定為 「複製永不」。
數字輸出停用規則
數字輸出停用 表示不允許內容從系統傳輸。 在 Windows 7 中,內建的 HD 音訊類別驅動程式會在 HDMI 端點上啟用 HDCP 來回應此設定。 這類似於驅動程式對複製保護設定的回應。
啟用受保護環境外部的內容保護機制
PUMA 位於受保護的環境 (PE) 中的個別進程。 在 Windows Vista 中,若要使用 PUMA 所提供的音訊內容保護控件,媒體應用程式必須位於 PE 中。 因為只有 Media Foundation API 可以與 PE 互動,因此內容保護控件僅限於使用媒體基礎 API 來串流音訊內容的應用程式。
在 Windows 7 中,任何應用程式都可以存取 PUMA 輸出信任授權單位 (OTA) 所提供的內容保護控件,無論它們是否在 PE 中,還是使用媒體基礎 API 進行音訊播放。
實作指示
音訊應用程式需要下列步驟,才能控制音訊端點上的SS或HDCP內容保護。 支援的音訊 API 是 DirectShow、DirectSound 和 WASAPI。
此範例程式代碼會使用下列介面。
媒體應用程式必須執行下列工作。
設定開發環境。
參考必要的介面,包括下列程式代碼中顯示的標頭。
#include <MMdeviceapi.h> // Device endpoint definitions #include <Mfidl.h> // OTA interface definitions
連結至 Mfuuid.lib 以使用 OTA 介面。
停用核心調試程式和驅動程序驗證器,以避免任何驗證檢查錯誤。
列舉系統中的所有端點,並從端點集合中選取目標端點,如下列程式代碼所示。 如需列舉裝置的詳細資訊,請參閱 列舉音訊裝置。
BOOL IsDigitalEndpoint(IMMDevice *pDevice) { PROPVARIANT var; IPropertyStore *pProperties = NULL; EndpointFormFactor formfactor; BOOL bResult = FALSE; HRESULT hr = S_OK; PropVariantInit(&var); // Open endpoint properties hr = pDevice->OpenPropertyStore(STGM_READ, &pProperties); IF_FAILED_JUMP(hr, Exit); // get form factor hr = pProperties->GetValue(PKEY_AudioEndpoint_FormFactor, &var); IF_FAILED_JUMP(hr, Exit); formfactor = (EndpointFormFactor)var.uiVal; // DigitalAudioDisplayDevice is defined same as HDMI formfactor if ((SPDIF == formfactor) || (DigitalAudioDisplayDevice == formfactor)) { bResult = TRUE; } Exit: PropVariantClear(&var); SAFE_RELEASE(pProperties); return bResult; }
/****************************************************************** * * * GetDevice: Selects an endpoint that meets the requirements. * * * * ppDevice: Receives a pointer to an IMMDevice interface of * * the device's endpoint object * * * * * ******************************************************************/ HRESULT GetDevice(IMMDevice** ppDevice) { IMMDeviceEnumerator *pEnumerator = NULL; IMMDevice *pDevice = NULL; IMMDeviceCollection *pEndpoints = NULL; UINT cEndpoints = 0; const CLSID CLSID_MMDeviceEnumerator = __uuidof(MMDeviceEnumerator); const IID IID_IMMDeviceEnumerator = __uuidof(IMMDeviceEnumerator); // Get enumerator for audio endpoint devices hr = CoCreateInstance( CLSID_MMDeviceEnumerator, NULL, CLSCTX_ALL, IID_IMMDeviceEnumerator, (void**)&pEnumerator)); EXIT_ON_ERROR(hr) // Enumerate all active endpoints, hr = pEnumerator->EnumAudioEndpoints ( eRender, DEVICE_STATE_ACTIVE, &pEndpoints); EXIT_ON_ERROR(hr) hr = pEndpoints->GetCount(&cEndpoints); EXIT_ON_ERROR(hr) for (UINT i = 0; i < cEndpoints; i++) { hr = pEndpoints->Item(i, &pDevice); IF_FAILED_JUMP(hr, Exit); { // Select the endpoint that meets the requirements. // For example, SPDIF analog output or HDMI if (IsDigitalEndpoint(pDevice)) { *(ppDevice) = pDevice; (*ppDevice)->AddRef(); break; } } SAFE_RELEASE(pDevice); } Exit: if (FAILED(hr)) { // Notify error. // Not Shown. } SAFE_RELEASE(pEndpoints); SAFE_RELEASE(pEnumerator); }
使用列舉程式所傳回端點的 IMMDevice 指標來啟動所需的音訊串流 API,並準備進行串流處理。 不同的音訊 API 需要稍微不同的準備。
- 針對 DShow 音訊應用程式:
呼叫 IMMDevice::Activate 並將IID_IBaseFilter指定為介面識別碼,以建立 DirectShow COM 物件。
IUnknown *pDShowFilter = NULL; ... hr = pDevice->Activate ( IID_IBaseFilter, CLSCTX_INPROC_SERVER, NULL, reinterpret_cast<void **>(&pDShowFilter));
使用裝置所啟動的這個 COM 物件來建置 DirectShow 篩選圖表。 如需此程式的詳細資訊,請參閱 DirectShow SDK 檔中的。
- 針對 DSound 音訊應用程式:
呼叫 IMMDevice::Activate 並將IID_IDirectSound8指定為介面識別碼,以建立 DSound COM 物件。
IDirectSound8 *pDSSound8; ... hr = pDevice->Activate ( IID_IDirectSound8, CLSCTX_INPROC_SERVER, NULL, reinterpret_cast<void **>(&pDSSound8));
使用上面建立的 DSound 對象來程式設計 DSound 進行蒸汽。 如需此程式的詳細資訊,請參閱 DirectSound。
- 若為 WASAPI:
呼叫 IMMDevice::Activate 並將IID_IAudioClient指定為介面識別碼,以建立 IAudioClient COM 物件。
IAudioClient *pIAudioClient = NULL; ... hr = pDevice->Activate ( IID_IAudioClient, CLSCTX_INPROC_SERVER, NULL, reinterpret_cast<void **>(&pIAudioClient));
開啟音訊數據流。
hr = pIAudioClient->Initialize(...);
- 針對 DShow 音訊應用程式:
啟動音訊串流。
在數據流上設定保護原則。
針對WASAPI用戶端,呼叫 IAudioClient::GetService 並指定IID_IMFTrustedOutput作為介面標識碼,以取得數據流輸出信任授權單位 (OTA) 物件的 IMFTrustedOutput 介面參考。
IMFTrustedOutput* pTrustedOutput = NULL; hr = pIAudioClient>GetService( __uuidof(IMFTrustedOutput), (void**)& pTrustedOutput);
呼叫 IMFTrustedOutput::GetOutputTrustAuthorityCount,以取得可用 OTA 物件的計數。
hr = pTrustedOutput->GetOutputTrustAuthorityCount(&m_dwCountOTA);
列舉 OTA 集合,並取得支援動作PEACTION_PLAY之 OTA 對象的參考。 所有 OTA 都會公開 IMFOutputTrustAuthority 介面。
hr = pMFTrustedOutput->GetOutputTrustAuthorityByIndex(I, &pMFOutputTrustAuthority); hr = pMFOutputTrustAuthority->GetAction(&action)
使用IMFTrustedOutput介面在數據流上設定保護原則。
hr = pTrustedOutput ->SetPolicy(&pPolicy, nPolicy, &pbTicket, &cbTicket);
注意
如果您使用EVR,SetPolicy 會引發MEPolicySet事件,並傳回MF_S_WAIT_FOR_POLICY_SET,表示 OTA 會以異步方式強制執行原則。 不過,在此範例程式代碼中,應用程式是直接從音訊用戶端擷取 OTA 物件的 WASAPI 用戶端(步驟 5 a)。 不同於EVR,音訊用戶端和其他WASAPI物件不會實作媒體事件產生器。 如果沒有媒體事件產生器, IMFTrustedOutput::SetPolicy 不會傳回MF_S_WAIT_FOR_POLICY_SET。
音訊原則設定必須在音訊串流啟動之後設定,否則 IMFTrustedOutput::GetOutputTrustAuthorityByIndex 會失敗。 此外,若要支援這項功能,基礎音訊驅動程式必須是 受信任的驅動程式。
在範例程式代碼中,pPolicy 是用戶端實作原則物件的 IMFOutputPolicy 介面指標。 如需詳細資訊,請參閱 媒體基礎 SDK 檔。
在IMFOutputPolicy::GenerateRequiredSchemas方法的實作中,必須產生輸出保護系統 (schemas) 集合,才能強制執行 OTA。 每個架構都是由 GUID 識別,並包含保護系統的組態數據。 請確定集合中的保護系統受限於使用受信任的音訊驅動程式。 GUID、MFPROTECTION_TRUSTEDAUDIODRIVERS、DISABLE 或 CONSTRICTAUDIO 會識別此限制。 如果使用MFPROTECTION_TRUSTEDAUDIODRIVERS,則此架構的組態數據是 DWORD。 如需架構和相關組態數據的詳細資訊,請參閱受保護的環境 SDK 檔。
用戶端也必須實 作IMFOutputSchema 介面來提供架構定義。 IMFOutputSchema::GetSchemaType 會 擷取 MFPROTECTION_TRUSTEDAUDIODRIVERS做為架構 GUID。 IMFOutputSchema::GetConfigurationData 會傳回架構組態數據的指標。
繼續音訊串流。
在停止串流之前,請確定保護原則已清除。
釋放上述相關原則介面參考。
發行呼叫會清除先前設定的原則設定。
注意
每次重新啟動數據流時,都必須在數據流上再次設定保護原則。 步驟 5-d 會說明此程式。
pMFOutputTrustAuthority->Release() pMFTrustedOutput->Release()
下列程式代碼範例示範原則和架構物件的範例實作。
//OTADsoundSample.cpp
#include <stdio.h>
#include <tchar.h>
#include <initguid.h>
#include <windows.h>
#include <mmreg.h>
#include <dsound.h>
#include <mfidl.h>
#include <Mmdeviceapi.h>
#include <AVEndpointKeys.h>
#include "OTADSoundSample.h"
#define STATIC_KSDATAFORMAT_SUBTYPE_AC3\
DEFINE_WAVEFORMATEX_GUID(WAVE_FORMAT_DOLBY_AC3_SPDIF)
DEFINE_GUIDSTRUCT("00000092-0000-0010-8000-00aa00389b71", KSDATAFORMAT_SUBTYPE_AC3);
#define KSDATAFORMAT_SUBTYPE_AC3 DEFINE_GUIDNAMED(KSDATAFORMAT_SUBTYPE_AC3)
HRESULT SetOTAPolicy(IMMDevice *_pMMDevice,
DWORD _dwConfigData,
IMFTrustedOutput **_ppMFTrustedOutput,
IMFOutputTrustAuthority **ppMFOutputTrustAuthority,
IMFOutputPolicy **_ppMFOutputPolicy);
HRESULT ClearOTAPolicy(IMFTrustedOutput *_pMFTrustedOutput,
IMFOutputTrustAuthority *_pMFOutputTrustAuthority,
IMFOutputPolicy *_pMFOutputPolicy);
const CLSID CLSID_MMDeviceEnumerator = __uuidof(MMDeviceEnumerator);
const IID IID_IMMDeviceEnumerator = __uuidof(IMMDeviceEnumerator);
BOOL IsDigitalEndpoint(IMMDevice *pDevice)
{
PROPVARIANT var;
IPropertyStore *pProperties = NULL;
EndpointFormFactor formfactor;
BOOL bResult = FALSE;
HRESULT hr = S_OK;
PropVariantInit(&var);
// Open endpoint properties
hr = pDevice->OpenPropertyStore(STGM_READ, &pProperties);
IF_FAILED_JUMP(hr, Exit);
// get form factor
hr = pProperties->GetValue(PKEY_AudioEndpoint_FormFactor, &var);
IF_FAILED_JUMP(hr, Exit);
formfactor = (EndpointFormFactor)var.uiVal;
if ((SPDIF == formfactor) || (DigitalAudioDisplayDevice == formfactor))
{
bResult = TRUE;
}
Exit:
PropVariantClear(&var);
SAFE_RELEASE(pProperties);
return bResult;
}
HRESULT GetDigitalAudioEndpoint(IMMDevice** ppDevice)
{
IMMDeviceEnumerator *pEnumerator = NULL;
IMMDevice *pDevice = NULL;
IMMDeviceCollection *pEndpoints = NULL;
UINT cEndpoints = 0;
HRESULT hr = S_OK;
*ppDevice = NULL;
// Get enumerator for audio endpoint devices.
hr = CoCreateInstance(CLSID_MMDeviceEnumerator, NULL,
CLSCTX_ALL, IID_IMMDeviceEnumerator,
(void**)&pEnumerator);
IF_FAILED_JUMP(hr, Exit);
// Enumerate all active render endpoints,
hr = pEnumerator->EnumAudioEndpoints(eRender, DEVICE_STATE_ACTIVE, &pEndpoints);
IF_FAILED_JUMP(hr, Exit);
hr = pEndpoints->GetCount(&cEndpoints);
IF_FAILED_JUMP(hr, Exit);
for (UINT i = 0; i < cEndpoints; i++)
{
hr = pEndpoints->Item(i, &pDevice);
IF_FAILED_JUMP(hr, Exit);
// Select the endpoint that meets the requirements.
// For example, SPDIF analog output or HDMI
// Not Shown.
if (IsDigitalEndpoint(pDevice))
{
*ppDevice = pDevice;
(*ppDevice)->AddRef();
break;
}
SAFE_RELEASE(pDevice);
}
Exit:
if (FAILED(hr))
{
// Notify error.
// Not Shown.
}
SAFE_RELEASE(pEndpoints);
SAFE_RELEASE(pEnumerator);
return hr;
}
//-------------------------------------------------------------------
int __cdecl wmain(int argc, char* argv[])
{
IMMDevice *pEndpoint=NULL;
HRESULT hr = S_OK;
// DSound related variables
IDirectSound8* DSSound8 = NULL;
IDirectSoundBuffer* DSBuffer = NULL;
DSBUFFERDESC DSBufferDesc;
WAVEFORMATEXTENSIBLE wfext;
WORD nChannels = 2;
DWORD nSamplesPerSec = 48000;
WORD wBitsPerSample = 16;
// OTA related variables
IMFTrustedOutput *pMFTrustedOutput=NULL;
IMFOutputPolicy *pMFOutputPolicy=NULL;
IMFOutputTrustAuthority *pMFOutputTrustAuthority=NULL;
DWORD dwConfigData=0;
// Initialize COM
hr = CoInitialize(NULL);
IF_FAILED_JUMP(hr, Exit);
printf("OTA test app for DSound\n");
hr = GetDigitalAudioEndpoint(&pEndpoint);
IF_FAILED_JUMP(hr, Exit);
if (pEndpoint)
{
printf("Found digital audio endpoint.\n");
}
//
// Active DSound interface
//
hr = pEndpoint->Activate(IID_IDirectSound8, CLSCTX_INPROC_SERVER, NULL, reinterpret_cast<void **>(&DSSound8));
IF_FAILED_JUMP(hr, Exit);
nChannels = 2;
nSamplesPerSec = 48000;
wBitsPerSample = 16;
ZeroMemory(&wfext, sizeof(wfext));
wfext.Format.wFormatTag = WAVE_FORMAT_EXTENSIBLE;
wfext.Format.nChannels = nChannels;
wfext.Format.nSamplesPerSec = nSamplesPerSec;
wfext.Format.wBitsPerSample = wBitsPerSample;
wfext.Format.nBlockAlign = (nChannels * wBitsPerSample) / 8;
wfext.Format.nAvgBytesPerSec = nSamplesPerSec * ((nChannels * wBitsPerSample) / 8);
wfext.Format.cbSize = 22;
wfext.Samples.wValidBitsPerSample = wBitsPerSample;
wfext.dwChannelMask = 0x3;
wfext.SubFormat = KSDATAFORMAT_SUBTYPE_PCM;
#if 1
wfext.SubFormat = KSDATAFORMAT_SUBTYPE_AC3;
#endif
ZeroMemory(&DSBufferDesc, sizeof(DSBufferDesc));
DSBufferDesc.dwSize = sizeof(DSBufferDesc);
DSBufferDesc.dwFlags = DSBCAPS_GLOBALFOCUS | DSBCAPS_LOCSOFTWARE | DSBCAPS_GETCURRENTPOSITION2;
DSBufferDesc.lpwfxFormat = (WAVEFORMATEX *)&wfext;
DSBufferDesc.dwBufferBytes = wfext.Format.nAvgBytesPerSec / 100;
HWND hwnd = GetForegroundWindow();
hr = DSSound8->SetCooperativeLevel(hwnd, DSSCL_PRIORITY);
IF_FAILED_JUMP(hr, Exit);
hr = DSSound8->CreateSoundBuffer(&DSBufferDesc, &DSBuffer, NULL);
IF_FAILED_JUMP(hr, Exit);
hr = DSBuffer->Play(0, 0, DSBPLAY_LOOPING);
IF_FAILED_JUMP(hr, Exit);
printf("Will set the following audio policy:\n");
printf("Test Certificate Enable: %s\n", TRUE ? "True" : "False");
printf("Copy OK: %s\n", FALSE ? "True" : "False");
printf("Digital Output Disable: %s\n", FALSE ? "True" : "False");
printf("DRM Level: %u\n", 1300);
// Set policy when the stream is in RUN state
dwConfigData = MAKE_MFPROTECTIONDATA_TRUSTEDAUDIODRIVERS2(TRUE, /*_bTestCertificateEnable*/
FALSE, /*_bDigitalOutputDisable*/
FALSE, /*_bCopyOK*/
1300 /*_dwDrmLevel*/);
hr = SetOTAPolicy(pEndpoint,dwConfigData, &pMFTrustedOutput, &pMFOutputTrustAuthority,&pMFOutputPolicy);
IF_FAILED_JUMP(hr, Exit);
//
// Perform all the necessary streaming operations here.
//
// stop audio streaming
DSBuffer->Stop();
// In order for the stream to restart successfully
// Need to release the following OutputTrust* interface to release audio endpoint
hr = ClearOTAPolicy(pMFTrustedOutput,pMFOutputTrustAuthority,pMFOutputPolicy);
IF_FAILED_JUMP(hr, Exit);
// After above release operations, the following Play() will succeed without device-in-use error message 0x8889000A
DSBuffer->SetCurrentPosition(0);
hr = DSBuffer->Play(0, 0, DSBPLAY_LOOPING);
IF_FAILED_JUMP(hr, Exit);
// Need to reset the new audio protection state because previous settings were gone with the ClearOTAPolicy call.
dwConfigData = MAKE_MFPROTECTIONDATA_TRUSTEDAUDIODRIVERS2(TRUE, /*_bTestCertificateEnable*/
FALSE, /*_bDigitalOutputDisable*/
FALSE, /*_bCopyOK*/
1300 /*_dwDrmLevel*/);
hr = SetOTAPolicy(pEndpoint,dwConfigData, &pMFTrustedOutput, &pMFOutputTrustAuthority,&pMFOutputPolicy);
IF_FAILED_JUMP(hr, Exit);
// Clean up setting before leaving your streaming app.
hr = ClearOTAPolicy(pMFTrustedOutput,pMFOutputTrustAuthority,pMFOutputPolicy);
IF_FAILED_JUMP(hr, Exit);
DSBuffer->SetCurrentPosition(0);
Exit:
SAFE_RELEASE(DSBuffer);
SAFE_RELEASE(DSSound8);
SAFE_RELEASE(pEndpoint);
CoUninitialize();
return 0;
}
//OTADSoundSample.h
// Macro defines
#define IF_FAILED_JUMP(_hresult, label) \
if(FAILED(_hresult)) \
{ \
goto label; \
}
#define SAFE_RELEASE(p) \
if (NULL != p) { \
(p)->Release(); \
(p) = NULL; \
}
#define IF_TRUE_ACTION_JUMP(condition, action, label) \
if(condition) \
{ \
action; \
goto label; \
}
// outputpolicy.h
class CTrustedAudioDriversOutputPolicy : public CMFAttributesImpl<IMFOutputPolicy>
{
friend
HRESULT CreateTrustedAudioDriversOutputPolicy(DWORD dwConfigData, IMFOutputPolicy **ppMFOutputPolicy);
private:
ULONG m_cRefCount;
DWORD m_dwConfigData;
GUID m_guidOriginator;
IMFOutputSchema *m_pOutputSchema;
CTrustedAudioDriversOutputPolicy(DWORD dwConfigData, HRESULT &hr);
~CTrustedAudioDriversOutputPolicy();
public:
// IUnknown methods
HRESULT STDMETHODCALLTYPE QueryInterface(/* [in] */ REFIID riid,/* [out] */ LPVOID *ppvObject);
ULONG STDMETHODCALLTYPE AddRef();
ULONG STDMETHODCALLTYPE Release();
// IMFOutputPolicy methods
HRESULT STDMETHODCALLTYPE
GenerateRequiredSchemas(
/* [in] */ DWORD dwAttributes,
/* [in] */ GUID guidOutputSubType,
/* [in] */ GUID *rgGuidProtectionSchemasSupported,
/* [in] */ DWORD cProtectionSchemasSupported,
/* [annotation][out] */
__out IMFCollection **ppRequiredProtectionSchemas);
HRESULT STDMETHODCALLTYPE GetOriginatorID(/* [annotation][out] */ __out GUID *pguidOriginatorID);
HRESULT STDMETHODCALLTYPE GetMinimumGRLVersion(/* [annotation][out] */ __out DWORD *pdwMinimumGRLVersion);
}; // CTrustedAudioDriversOutputPolicy
class CTrustedAudioDriversOutputSchema : public CMFAttributesImpl<IMFOutputSchema>
{
friend
HRESULT CreateTrustedAudioDriversOutputSchema(
DWORD dwConfigData,
GUID guidOriginatorID,
IMFOutputSchema **ppMFOutputSchema
);
private:
CTrustedAudioDriversOutputSchema(DWORD dwConfigData, GUID guidOriginatorID);
~CTrustedAudioDriversOutputSchema();
ULONG m_cRefCount;
DWORD m_dwConfigData;
GUID m_guidOriginatorID;
public:
// IUnknown methods
HRESULT STDMETHODCALLTYPE QueryInterface(
/* [in] */ REFIID riid,
/* [out] */ LPVOID *ppvObject
);
ULONG STDMETHODCALLTYPE AddRef();
ULONG STDMETHODCALLTYPE Release();
// IMFOutputSchema methods
HRESULT STDMETHODCALLTYPE GetConfigurationData(__out DWORD *pdwVal);
HRESULT STDMETHODCALLTYPE GetOriginatorID(__out GUID *pguidOriginatorID);
HRESULT STDMETHODCALLTYPE GetSchemaType(__out GUID *pguidSchemaType);
}; // CTrustedAudioDriversOutputSchema
// outputpolicy.cpp
#include <windows.h>
#include <tchar.h>
#include <mfidl.h>
#include <atlstr.h>
#include <attributesbase.h>
#include "OTADSoundSample.h"
#include <Mmdeviceapi.h>
#include "OutputPolicy.h"
#define RETURN_INTERFACE(T, iid, ppOut) \
if (IsEqualIID(__uuidof(T), (iid))) { \
this->AddRef(); \
*(ppOut) = static_cast<T *>(this); \
return S_OK; \
} else {} (void)0
//--------------------------------------------------------------------------
// Implementation for CTrustedAudioDriversOutputPolicy
//--------------------------------------------------------------------------
// constructor
CTrustedAudioDriversOutputPolicy::CTrustedAudioDriversOutputPolicy(DWORD dwConfigData, HRESULT &hr)
: m_cRefCount(1), m_dwConfigData(dwConfigData), m_pOutputSchema(NULL)
{
hr = CoCreateGuid(&m_guidOriginator);
IF_FAILED_JUMP(hr, Exit);
hr = CreateTrustedAudioDriversOutputSchema(dwConfigData, m_guidOriginator, &m_pOutputSchema);
IF_FAILED_JUMP(hr, Exit);
Exit:
if (FAILED(hr))
{
printf("CreateTrustedAudioDriversOutputSchema failed: hr = 0x%08x", hr);
}
return;
}
// destructor
CTrustedAudioDriversOutputPolicy::~CTrustedAudioDriversOutputPolicy()
{
if (NULL != m_pOutputSchema)
{
m_pOutputSchema->Release();
}
}
// IUnknown::QueryInterface
HRESULT STDMETHODCALLTYPE
CTrustedAudioDriversOutputPolicy::QueryInterface(
/* [in] */ REFIID riid,
/* [out] */ LPVOID *ppvObject)
{
HRESULT hr = E_NOINTERFACE;
IF_TRUE_ACTION_JUMP((NULL == ppvObject), hr = E_POINTER, Exit);
*ppvObject = NULL;
RETURN_INTERFACE(IUnknown, riid, ppvObject);
RETURN_INTERFACE(IMFAttributes, riid, ppvObject);
RETURN_INTERFACE(IMFOutputPolicy, riid, ppvObject);
Exit:
return hr;
}
// IUnknown::AddRef
ULONG STDMETHODCALLTYPE CTrustedAudioDriversOutputPolicy::AddRef()
{
ULONG uNewRefCount = InterlockedIncrement(&m_cRefCount);
return uNewRefCount;
}
// IUnknown::Release
ULONG STDMETHODCALLTYPE CTrustedAudioDriversOutputPolicy::Release()
{
ULONG uNewRefCount = InterlockedDecrement(&m_cRefCount);
if (0 == uNewRefCount)
{
delete this;
}
return uNewRefCount;
}
// IMFOutputPolicy::GenerateRequiredSchemas
HRESULT STDMETHODCALLTYPE CTrustedAudioDriversOutputPolicy::GenerateRequiredSchemas
(
/* [in] */ DWORD dwAttributes,
/* [in] */ GUID guidOutputSubType,
/* [in] */ GUID *rgGuidProtectionSchemasSupported,
/* [in] */ DWORD cProtectionSchemasSupported,
/* [annotation][out] */
__out IMFCollection **ppRequiredProtectionSchemas
)
{
HRESULT hr = S_OK;
bool bTrustedAudioDriversSupported = false;
// if we've made it this far then the Output Trust Authority supports Trusted Audio Drivers
// create a collection and put our output policy in it
// then give that collection to the caller
CComPtr<IMFCollection> pMFCollection;
// sanity checks
IF_TRUE_ACTION_JUMP((NULL == ppRequiredProtectionSchemas), hr = E_POINTER, Exit);
*ppRequiredProtectionSchemas = NULL;
IF_TRUE_ACTION_JUMP((NULL == rgGuidProtectionSchemasSupported) && (0 != cProtectionSchemasSupported),
hr = E_POINTER, Exit);
// log all the supported protection schemas
for (DWORD i = 0; i < cProtectionSchemasSupported; i++)
{
if (IsEqualIID(MFPROTECTION_TRUSTEDAUDIODRIVERS, rgGuidProtectionSchemasSupported[i]))
{
bTrustedAudioDriversSupported = true;
}
}
if (!bTrustedAudioDriversSupported)
{
return HRESULT_FROM_WIN32(ERROR_RANGE_NOT_FOUND);
}
// create the collection
hr = MFCreateCollection(&pMFCollection);
if (FAILED(hr))
{
return hr;
}
// add our output policy to the collection
hr = pMFCollection->AddElement(m_pOutputSchema);
if (FAILED(hr))
{
return hr;
}
Exit:
// give the collection to the caller
return pMFCollection.CopyTo(ppRequiredProtectionSchemas); // increments refcount
}// GenerateRequiredSchemas
HRESULT STDMETHODCALLTYPE CTrustedAudioDriversOutputPolicy::GetOriginatorID(__out GUID *pguidOriginatorID)
{
if (NULL == pguidOriginatorID)
{
return E_POINTER;
}
*pguidOriginatorID = m_guidOriginator;
return S_OK;
}
HRESULT STDMETHODCALLTYPE CTrustedAudioDriversOutputPolicy::GetMinimumGRLVersion(__out DWORD *pdwMinimumGRLVersion)
{
if (NULL == pdwMinimumGRLVersion)
{
return E_POINTER;
}
*pdwMinimumGRLVersion = 0;
return S_OK;
}
//--------------------------------------------------------------------------
// Implementation for CTrustedAudioDriversOutputSchema
//--------------------------------------------------------------------------
// constructor
CTrustedAudioDriversOutputSchema::CTrustedAudioDriversOutputSchema
(
DWORD dwConfigData,
GUID guidOriginatorID
)
: m_cRefCount(1)
, m_dwConfigData(dwConfigData)
, m_guidOriginatorID(guidOriginatorID)
{}
// destructor
CTrustedAudioDriversOutputSchema::~CTrustedAudioDriversOutputSchema() {}
// IUnknown::QueryInterface
HRESULT STDMETHODCALLTYPE CTrustedAudioDriversOutputSchema::QueryInterface
(
/* [in] */ REFIID riid,
/* [out] */ LPVOID *ppvObject
)
{
HRESULT hr = E_NOINTERFACE;
IF_TRUE_ACTION_JUMP((NULL == ppvObject), hr = E_POINTER, Exit);
*ppvObject = NULL;
RETURN_INTERFACE(IUnknown, riid, ppvObject);
RETURN_INTERFACE(IMFAttributes, riid, ppvObject);
RETURN_INTERFACE(IMFOutputSchema, riid, ppvObject);
Exit:
return hr;
}
// IUnknown::AddRef
ULONG STDMETHODCALLTYPE CTrustedAudioDriversOutputSchema::AddRef()
{
ULONG uNewRefCount = InterlockedIncrement(&m_cRefCount);
return uNewRefCount;
}
// IUnknown::Release
ULONG STDMETHODCALLTYPE CTrustedAudioDriversOutputSchema::Release()
{
ULONG uNewRefCount = InterlockedDecrement(&m_cRefCount);
if (0 == uNewRefCount)
{
delete this;
}
return uNewRefCount;
}
// IMFOutputSchema::GetConfigurationData
HRESULT STDMETHODCALLTYPE CTrustedAudioDriversOutputSchema::GetConfigurationData(__out DWORD *pdwVal)
{
if (NULL == pdwVal) { return E_POINTER; }
*pdwVal = m_dwConfigData;
return S_OK;
}
// IMFOutputSchema::GetOriginatorID
HRESULT STDMETHODCALLTYPE CTrustedAudioDriversOutputSchema::GetOriginatorID(__out GUID *pguidOriginatorID)
{
if (NULL == pguidOriginatorID) { return E_POINTER; }
*pguidOriginatorID = m_guidOriginatorID;
return S_OK;
}
// IMFOutputSchema::GetSchemaType
HRESULT STDMETHODCALLTYPE CTrustedAudioDriversOutputSchema::GetSchemaType(__out GUID *pguidSchemaType)
{
if (NULL == pguidSchemaType) { return E_POINTER; }
*pguidSchemaType = MFPROTECTION_TRUSTEDAUDIODRIVERS;
return S_OK;
}
//---------------------------------------------------------------------------------------------------
//
// Other subroutine declarations
//
//---------------------------------------------------------------------------------------------------
HRESULT CreateTrustedAudioDriversOutputPolicy(DWORD dwConfigData, IMFOutputPolicy **ppMFOutputPolicy)
{
if (NULL == ppMFOutputPolicy)
{
return E_POINTER;
}
*ppMFOutputPolicy = NULL;
HRESULT hr = S_OK;
CTrustedAudioDriversOutputPolicy *pPolicy = new CTrustedAudioDriversOutputPolicy(dwConfigData, hr);
if (NULL == pPolicy)
{
return E_OUTOFMEMORY;
}
if (FAILED(hr))
{
delete pPolicy;
return hr;
}
*ppMFOutputPolicy = static_cast<IMFOutputPolicy *>(pPolicy);
return S_OK;
}// CreateTrustedAudioDriversOutputPolicy
HRESULT CreateTrustedAudioDriversOutputSchema
(
DWORD dwConfigData,
GUID guidOriginatorID,
IMFOutputSchema **ppMFOutputSchema)
{
if (NULL == ppMFOutputSchema)
{
return E_POINTER;
}
*ppMFOutputSchema = NULL;
CTrustedAudioDriversOutputSchema *pSchema =
new CTrustedAudioDriversOutputSchema(dwConfigData, guidOriginatorID);
if (NULL == pSchema)
{
return E_OUTOFMEMORY;
}
*ppMFOutputSchema = static_cast<IMFOutputSchema *>(pSchema);
return S_OK;
}// CreateTrustedAudioDriversOutputSchema
HRESULT SetOTAPolicy(IMMDevice *_pMMDevice,
DWORD _dwConfigData,
IMFTrustedOutput **_ppMFTrustedOutput,
IMFOutputTrustAuthority **ppMFOutputTrustAuthority,
IMFOutputPolicy **_ppMFOutputPolicy)
{
HRESULT hr = S_OK;
DWORD dwCountOfOTAs = 0;
bool bRet = false;
hr = CreateTrustedAudioDriversOutputPolicy(_dwConfigData, _ppMFOutputPolicy);
IF_FAILED_JUMP(hr, Exit);
// activate IMFTrustedOutput
hr = _pMMDevice->Activate(__uuidof(IMFTrustedOutput), CLSCTX_ALL, NULL,
(void**)_ppMFTrustedOutput);
IF_FAILED_JUMP(hr, Exit);
// get count of Output Trust Authorities on this trusted output
hr = (*_ppMFTrustedOutput)->GetOutputTrustAuthorityCount(&dwCountOfOTAs);
IF_FAILED_JUMP(hr, Exit);
// sanity check - fail on endpoints with no output trust authorities
IF_TRUE_ACTION_JUMP((0 == dwCountOfOTAs), hr = E_NOTFOUND, Exit);
printf("dwCountOfOTAs = %d\n", dwCountOfOTAs);
// loop over each output trust authority on the endpoint
for (DWORD i = 0; i < dwCountOfOTAs; i++)
{
// get the output trust authority
hr = (*_ppMFTrustedOutput)->GetOutputTrustAuthorityByIndex(i, ppMFOutputTrustAuthority);
IF_FAILED_JUMP(hr, Exit);
// log the purpose of the output trust authority
MFPOLICYMANAGER_ACTION action;
hr = (*ppMFOutputTrustAuthority)->GetAction(&action);
if (FAILED(hr))
{
return hr;
}
printf(" It's %s.", (PEACTION_PLAY==action) ? "PEACTION_PLAY" :
(PEACTION_COPY==action) ? "PEACTION_COPY" :
"Others");
// only PEACTION_PLAY Output Trust Authorities are relevant
if (PEACTION_PLAY != action)
{
printf("Skipping as the OTA action is not PEACTION_PLAY");
SAFE_RELEASE(*ppMFOutputTrustAuthority);
continue;
}
BYTE *pbTicket = NULL;
DWORD cbTicket = 0;
// audio ota does not support ticket, leaving it NULL is ok.
hr = (*ppMFOutputTrustAuthority)->SetPolicy(_ppMFOutputPolicy, 1, &pbTicket, &cbTicket);
IF_FAILED_JUMP(hr, Exit);
printf("SetPolicy succeeded.\n");
bRet = true;
break;
}// for each output trust authority
Exit:
if (bRet)
{
hr = S_OK;
}
if (FAILED(hr))
{
printf("failure code is 0x%0x\n", hr);
SAFE_RELEASE(*ppMFOutputTrustAuthority);
SAFE_RELEASE(*_ppMFTrustedOutput);
if (*_ppMFOutputPolicy)
{
delete (*_ppMFOutputPolicy);
}
}
return hr;
}
HRESULT ClearOTAPolicy(IMFTrustedOutput *_pMFTrustedOutput,
IMFOutputTrustAuthority *_pMFOutputTrustAuthority,
IMFOutputPolicy *_pMFOutputPolicy)
{
SAFE_RELEASE(_pMFOutputTrustAuthority);
SAFE_RELEASE(_pMFTrustedOutput);
if (_pMFOutputPolicy)
{
delete _pMFOutputPolicy;
}
return S_OK;
}
//OTADSoundSample.rc
#include "windows.h"
/////////////////////////////////////////////////////////////////////////////
// Version
#include <ntverp.h>
#define VER_FILETYPE VFT_DLL
#define VER_FILESUBTYPE VFT2_UNKNOWN
#define VER_FILEDESCRIPTION_STR "Default Device Heuristic Dumper"
#define VER_INTERNALNAME_STR "DefaultDeviceDump.exe"
#define VER_ORIGINALFILENAME_STR "DefaultDeviceDump.exe"
#include "common.ver"
Sources file:
TARGETNAME=OTADSoundSample
TARGETTYPE=PROGRAM
TARGET_DESTINATION=retail
UMTYPE=console
UMENTRY=wmain
UMBASE=0x1000000
#_NT_TARGET_VERSION=$(_NT_TARGET_VERSION_VISTA)
MSC_WARNING_LEVEL=$(MSC_WARNING_LEVEL) /WX
USE_ATL=1
ATL_VER=70
USE_NATIVE_EH=1
USE_MSVCRT=1
C_DEFINES=-DUNICODE -D_UNICODE
INCLUDES=$(INCLUDES);
SOURCES=OTADSoundSample.cpp \
OTADSoundSample.rc \
outputpolicy.cpp\
TARGETLIBS=\
$(SDK_LIB_PATH)\advapi32.lib \
$(SDK_LIB_PATH)\kernel32.lib \
$(SDK_LIB_PATH)\User32.lib \
$(SDK_LIB_PATH)\shlwapi.lib \
$(SDK_LIB_PATH)\ole32.lib \
$(SDK_LIB_PATH)\oleaut32.lib \
$(SDK_LIB_PATH)\rpcrt4.lib \
$(SDK_LIB_PATH)\strmiids.lib \
$(SDK_LIB_PATH)\uuid.lib \
$(SDK_LIB_PATH)\SetupAPI.lib \
$(SDK_LIB_PATH)\mfplat.lib \