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ThemeMusic.cpp
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ThemeMusic.cpp
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#include "pch.h"
#include "ThemeMusic.h"
#include "Utility.h"
// Disable warning 4400 (not sure why it's happening)
#pragma warning ( disable : 4400 )
// MediaEngineNotify: Implements the callback for Media Engine event notification.
class MediaEngineNotify : public IMFMediaEngineNotify
{
private:
long m_cRef;
//Windows::UI::Core::CoreWindow^ m_cWindow;
ThemeMusic *m_tM;
public:
MediaEngineNotify(Windows::UI::Core::CoreWindow^ /*cWindow*/, ThemeMusic *tM) : /*m_cWindow(cWindow),*/ m_cRef(1), m_tM(tM)
{
}
STDMETHODIMP QueryInterface(REFIID riid, void** ppv)
{
if(__uuidof(IMFMediaEngineNotify) == riid)
{
*ppv = static_cast<IMFMediaEngineNotify*>(this);
}
else
{
*ppv = NULL;
return E_NOINTERFACE;
}
AddRef();
return S_OK;
}
STDMETHODIMP_(ULONG) AddRef()
{
return InterlockedIncrement(&m_cRef);
}
STDMETHODIMP_(ULONG) Release()
{
LONG cRef = InterlockedDecrement(&m_cRef);
if (cRef == 0)
{
delete this;
}
return cRef;
}
// EventNotify is called when the Media Engine sends an event.
STDMETHODIMP EventNotify(DWORD meEvent, DWORD_PTR param1, DWORD)
{
if (meEvent == MF_MEDIA_ENGINE_EVENT_NOTIFYSTABLESTATE)
{
SetEvent(reinterpret_cast<HANDLE>(param1));
}
else
{
m_tM->OnMediaEngineEvent(meEvent);
}
return S_OK;
}
};
ThemeMusic::ThemeMusic(Windows::UI::Core::CoreWindow^ window)
{
m_bstrURL = NULL;
ThrowIfFailed(
MFStartup(
MF_VERSION
));
// Create our event callback object.
m_spNotify = new MediaEngineNotify(window, this);
if (m_spNotify == NULL)
{
ThrowIfFailed(E_OUTOFMEMORY);
}
ThrowIfFailed(
CoCreateInstance(
CLSID_MFMediaEngineClassFactory, NULL, CLSCTX_INPROC_SERVER, IID_PPV_ARGS(&m_spFactory)));
ThrowIfFailed(
MFCreateAttributes(&m_spAttributes, 1));
ThrowIfFailed(
m_spAttributes->SetUnknown(MF_MEDIA_ENGINE_CALLBACK, (IUnknown*) m_spNotify));
ThrowIfFailed(m_spFactory->CreateInstance(
MF_MEDIA_ENGINE_WAITFORSTABLE_STATE | MF_MEDIA_ENGINE_AUDIOONLY,
m_spAttributes,
&m_spEngine
));
ThrowIfFailed(m_spEngine->QueryInterface(__uuidof(IMFMediaEngine), (void**) &m_spEngineEx));
ThrowIfFailed(m_spEngine->SetLoop(true));
}
ThemeMusic::~ThemeMusic()
{
delete m_spNotify;
}
void ThemeMusic::Play()
{
SetFile();
}
void ThemeMusic::SetFile()
{
auto themeMusic = this;
StorageFolder^ folder = Windows::ApplicationModel::Package::Current->InstalledLocation;
IAsyncOperation<Windows::Storage::StorageFile^>^ op = folder->GetFileAsync("Sound\\PuckTheme.mp3");
op->Completed = ref new AsyncOperationCompletedHandler<StorageFile^>([themeMusic](IAsyncOperation<StorageFile^>^ fileOp, AsyncStatus)
{
StorageFile^ fileHandle = fileOp->GetResults();
if (!fileHandle)
{
ThrowIfFailed(E_OUTOFMEMORY);
}
auto fOpenStream = fileHandle->OpenAsync(Windows::Storage::FileAccessMode::Read);
if(!fOpenStream)
{
ThrowIfFailed(E_OUTOFMEMORY);
}
themeMusic->SetURL(fileHandle->Path);
fOpenStream->Completed = ref new AsyncOperationCompletedHandler<IRandomAccessStream^>(
[themeMusic](IAsyncOperation<IRandomAccessStream^>^ asyncRead, AsyncStatus)
{
auto streamHandle = asyncRead->GetResults();
themeMusic->SetBytestream(streamHandle);
});
});
}
void ThemeMusic::OnMediaEngineEvent(DWORD meEvent)
{
switch (meEvent)
{
case MF_MEDIA_ENGINE_EVENT_LOADSTART:
break;
case MF_MEDIA_ENGINE_EVENT_LOADEDDATA:
break;
case MF_MEDIA_ENGINE_EVENT_LOADEDMETADATA:
break;
case MF_MEDIA_ENGINE_EVENT_CANPLAY:
ThrowIfFailed(m_spEngine->Play());
break;
case MF_MEDIA_ENGINE_EVENT_PLAY:
break;
case MF_MEDIA_ENGINE_EVENT_PAUSE:
break;
case MF_MEDIA_ENGINE_EVENT_TIMEUPDATE:
break;
case MF_MEDIA_ENGINE_EVENT_ERROR:
ThrowIfFailed(E_ABORT);
break;
}
}
void ThemeMusic::SetBytestream(IRandomAccessStream^ streamHandle)
{
IMFByteStream *spMFByteStream = NULL;
ThrowIfFailed(MFCreateMFByteStreamOnStreamEx((IUnknown*)streamHandle, &spMFByteStream));
ThrowIfFailed(m_spEngineEx->SetSourceFromByteStream(spMFByteStream, m_bstrURL));
}
void ThemeMusic::SetURL(Platform::String^ szURL)
{
if(NULL != m_bstrURL)
{
SysFreeString(m_bstrURL);
m_bstrURL = NULL;
}
m_bstrURL = SysAllocString(szURL->Data());
if (m_bstrURL == 0)
{
ThrowIfFailed(E_OUTOFMEMORY);
}
return;
}