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83 lines
2.5 KiB
C++
83 lines
2.5 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "WMFClearKeyCDMFactory.h"
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#include <string>
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#include <Mferror.h>
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#include "WMFClearKeyCDMAccess.h"
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#include "WMFClearKeyUtils.h"
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namespace mozilla {
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using Microsoft::WRL::MakeAndInitialize;
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ActivatableClass(WMFClearKeyCDMFactory);
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bool isRequiringHDCP22OrAbove(LPCWSTR aType) {
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if (aType == nullptr || *aType == L'\0') {
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return false;
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}
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// The HDCP value follows the feature value in
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// https://docs.microsoft.com/en-us/uwp/api/windows.media.protection.protectioncapabilities.istypesupported?view=winrt-19041
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// - 1 (on without HDCP 2.2 Type 1 restriction)
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// - 2 (on with HDCP 2.2 Type 1 restriction)
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std::wstring wstr(aType);
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std::string hdcpStr(wstr.begin(), wstr.end());
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return wstr.find(L"hdcp=2") != std::string::npos;
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}
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STDMETHODIMP_(BOOL)
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WMFClearKeyCDMFactory::IsTypeSupported(_In_ LPCWSTR aKeySystem,
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_In_opt_ LPCWSTR aContentType) {
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// For testing, return support for most of cases. Only returns false for some
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// special cases.
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bool needHDCP22OrAbove = isRequiringHDCP22OrAbove(aContentType);
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ENTRY_LOG_ARGS("Need-HDCP2.2+=%d", needHDCP22OrAbove);
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// As the API design of the Media Foundation, we can only know whether the
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// requester is asking for HDCP 2.2+ or not, we can't know the exact HDCP
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// version which is used in getStatusPolicy web api. Therefore, we pretend
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// ourselves only having HDCP 2.1 compliant.
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if (needHDCP22OrAbove) {
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return false;
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}
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return true;
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}
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STDMETHODIMP
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WMFClearKeyCDMFactory::CreateContentDecryptionModuleAccess(
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LPCWSTR aKeySystem, IPropertyStore** aConfigurations,
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DWORD aNumConfigurations, IMFContentDecryptionModuleAccess** aCdmAccess) {
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ENTRY_LOG();
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if (aKeySystem == nullptr || aKeySystem[0] == L'\0') {
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ENTRY_LOG_ARGS("Key system is null or empty");
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return MF_TYPE_ERR;
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}
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if (aNumConfigurations == 0) {
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ENTRY_LOG_ARGS("No available configration");
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return MF_TYPE_ERR;
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}
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if (!IsTypeSupported(aKeySystem, nullptr)) {
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ENTRY_LOG_ARGS("Not supported type");
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return MF_NOT_SUPPORTED_ERR;
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}
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RETURN_IF_FAILED((
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MakeAndInitialize<WMFClearKeyCDMAccess, IMFContentDecryptionModuleAccess>(
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aCdmAccess)));
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ENTRY_LOG_ARGS("Created CDM access!");
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return S_OK;
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}
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#undef LOG
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} // namespace mozilla
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