rainmeter-studio/Plugins/PluginNowPlaying/PlayerITunes.cpp

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/*
Copyright (C) 2011 Birunthan Mohanathas (www.poiru.net)
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "StdAfx.h"
#include "PlayerITunes.h"
CPlayer* CPlayerITunes::c_Player = NULL;
extern HINSTANCE g_Instance;
/*
** CEventHandler
**
** Constructor.
**
*/
CPlayerITunes::CEventHandler::CEventHandler(CPlayerITunes* player) :
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m_Player(player),
m_RefCount(),
m_ConnectionPoint(),
m_ConnectionCookie()
{
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IConnectionPointContainer* icpc;
m_Player->m_iTunes->QueryInterface(IID_IConnectionPointContainer, (void**)&icpc);
icpc->FindConnectionPoint(DIID__IiTunesEvents, &m_ConnectionPoint);
m_ConnectionPoint->Advise(this, &m_ConnectionCookie);
icpc->Release();
}
/*
** ~CEventHandler
**
** Destructor.
**
*/
CPlayerITunes::CEventHandler::~CEventHandler()
{
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if (m_ConnectionPoint)
{
m_ConnectionPoint->Unadvise(m_ConnectionCookie);
m_ConnectionPoint->Release();
}
}
HRESULT STDMETHODCALLTYPE CPlayerITunes::CEventHandler::QueryInterface(REFIID iid, void** ppvObject)
{
if (iid == IID_IUnknown || iid == IID_IUnknown || iid == DIID__IiTunesEvents)
{
++m_RefCount;
*ppvObject = this;
return S_OK;
}
return E_NOINTERFACE;
}
ULONG STDMETHODCALLTYPE CPlayerITunes::CEventHandler::AddRef()
{
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return ++m_RefCount;
}
ULONG STDMETHODCALLTYPE CPlayerITunes::CEventHandler::Release()
{
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return --m_RefCount;
}
HRESULT STDMETHODCALLTYPE CPlayerITunes::CEventHandler::Invoke(DISPID dispidMember, REFIID, LCID, WORD, DISPPARAMS* dispParams, VARIANT*, EXCEPINFO*, UINT*)
{
switch (dispidMember)
{
case ITEventPlayerPlay:
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m_Player->OnStateChange(true);
m_Player->OnTrackChange();
break;
case ITEventPlayerStop:
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m_Player->OnStateChange(false);
break;
case ITEventPlayerPlayingTrackChanged:
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m_Player->OnTrackChange();
break;
case ITEventSoundVolumeChanged:
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m_Player->OnVolumeChange(dispParams->rgvarg[0].intVal);
break;
case ITEventAboutToPromptUserToQuit:
PostMessage(m_Player->m_CallbackWindow, WM_USER, ITEventAboutToPromptUserToQuit, 0);
SetTimer(m_Player->m_CallbackWindow, TIMER_CHECKACTIVE, 500, NULL);
break;
}
return S_OK;
}
/*
** CPlayerITunes
**
** Constructor.
**
*/
CPlayerITunes::CPlayerITunes() : CPlayer(),
m_CallbackWindow(),
m_iTunesActive(false),
m_iTunes(),
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m_iTunesEvent()
{
// Create windows class
WNDCLASS wc = {0};
wc.hInstance = g_Instance;
wc.lpfnWndProc = WndProc;
wc.lpszClassName = L"NowPlayingITunesClass";
RegisterClass(&wc);
// Create callback window
m_CallbackWindow = CreateWindow(L"NowPlayingITunesClass",
L"CallbackWindow",
WS_DISABLED,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
HWND_MESSAGE,
NULL,
g_Instance,
this);
}
/*
** ~CPlayerITunes
**
** Destructor.
**
*/
CPlayerITunes::~CPlayerITunes()
{
c_Player = NULL;
DestroyWindow(m_CallbackWindow);
UnregisterClass(L"NowPlayingITunesClass", g_Instance);
Uninitialize();
}
/*
** Create
**
** Creates a shared class object.
**
*/
CPlayer* CPlayerITunes::Create()
{
if (!c_Player)
{
c_Player = new CPlayerITunes();
}
return c_Player;
}
/*
** Initialize
**
** Initialize iTunes COM interface and event handler.
**
*/
void CPlayerITunes::Initialize()
{
while (true)
{
HRESULT hr = CoCreateInstance(CLSID_iTunesApp, NULL, CLSCTX_LOCAL_SERVER, IID_IiTunes, (PVOID*)&m_iTunes);
if (hr == CO_E_SERVER_EXEC_FAILURE)
{
// This seems to happen if there is a modal dialog being shown in iTunes
// or some other delay has occurred. Retrying should do the trick.
continue;
}
else if (hr != S_OK)
{
// Failed to get hold of iTunes instance via COM
m_iTunes = NULL;
}
break;
}
if (m_iTunes)
{
m_Initialized = true;
// Set up event handler
m_iTunesEvent = new CEventHandler(this);
// Try getting track info and player state
ITPlayerState state;
if (SUCCEEDED(m_iTunes->get_PlayerState(&state)))
{
if (state == ITPlayerStateStopped)
{
// Determine if paused of stopped
long position;
m_iTunes->get_PlayerPosition(&position);
if (position != 0)
{
m_State = PLAYER_PAUSED;
OnTrackChange();
}
}
else if (state == ITPlayerStatePlaying)
{
m_State = PLAYER_PLAYING;
OnTrackChange();
}
long volume;
m_iTunes->get_SoundVolume(&volume);
m_Volume = (UINT)volume;
}
}
else
{
m_Initialized = false;
LSLog(LOG_ERROR, L"Rainmeter", L"NowPlayingPlugin: Failed to get hold of iTunes instance via COM.");
}
}
/*
** Uninitialize
**
** Close iTunes COM interface.
**
*/
void CPlayerITunes::Uninitialize()
{
if (m_Initialized)
{
m_Initialized = false;
ClearData();
m_iTunes->Release();
delete m_iTunesEvent;
}
}
/*
** WndProc
**
** Window procedure for the callback window.
**
*/
LRESULT CALLBACK CPlayerITunes::WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
static CPlayerITunes* player;
switch (msg)
{
case WM_CREATE:
// Get pointer to the CPlayerITunes class from the CreateWindow call
player = (CPlayerITunes*)(((CREATESTRUCT*)lParam)->lpCreateParams);
return 0;
case WM_USER:
if (wParam == ITEventAboutToPromptUserToQuit)
{
// Event handler calls this through a PostMessage when iTunes quits
player->Uninitialize();
}
return 0;
case WM_TIMER:
if (wParam == TIMER_CHECKACTIVE)
{
if (!FindWindow(L"iTunes", L"iTunes"))
{
player->m_iTunesActive = false;
KillTimer(hwnd, TIMER_CHECKACTIVE);
}
}
return 0;
default:
return DefWindowProc(hwnd, msg, wParam, lParam);
}
}
/*
** CheckWindow
**
** Try to find iTunes periodically.
**
*/
bool CPlayerITunes::CheckWindow()
{
static DWORD oldTime = 0;
DWORD time = GetTickCount();
if (time - oldTime > 5000)
{
oldTime = time;
HWND wnd = FindWindow(L"iTunes", L"iTunes");
if (wnd && !m_iTunesActive)
{
m_iTunesActive = true;
Initialize();
}
}
return m_Initialized;
}
/*
** UpdateData
**
** Called during each update of the main measure.
**
*/
void CPlayerITunes::UpdateData()
{
if ((m_Initialized || CheckWindow()) && m_State != PLAYER_STOPPED)
{
long position;
m_iTunes->get_PlayerPosition(&position);
m_Position = (UINT)position;
}
}
/*
** OnTrackChange
**
** Called by iTunes event handler on track change.
**
*/
void CPlayerITunes::OnTrackChange()
{
IITTrack* track;
HRESULT hr = m_iTunes->get_CurrentTrack(&track);
if (SUCCEEDED(hr))
{
CComBSTR tmpStr;
long tmpVal;
// Get metadata
track->get_Artist(&tmpStr);
tmpStr ? (m_Artist = tmpStr) : m_Artist.clear();
track->get_Name(&tmpStr);
tmpStr ? (m_Title = tmpStr) : m_Title.clear();
track->get_Album(&tmpStr);
tmpStr ? (m_Album = tmpStr) : m_Album.clear();
track->get_Duration(&tmpVal);
m_Duration = (UINT)tmpVal;
// Rating is 0 - 100, divide to 0 - 5
track->get_Rating(&tmpVal);
tmpVal /= 20L;
m_Rating = (UINT)tmpVal;
IITFileOrCDTrack* file;
hr = track->QueryInterface(&file);
if (SUCCEEDED(hr))
{
file->get_Location(&tmpStr);
file->Release();
if (tmpStr && wcscmp(tmpStr, m_FilePath.c_str()) != 0)
{
++m_TrackCount;
m_FilePath = tmpStr;
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if (m_Measures & MEASURE_COVER)
{
m_CoverPath = GetCacheFile();
if (!CCover::GetCached(m_CoverPath))
{
// Art not in cache, check for embedded art through iTunes interface
IITArtworkCollection* artworkCollection;
hr = track->get_Artwork(&artworkCollection);
if (SUCCEEDED(hr))
{
long count;
artworkCollection->get_Count(&count);
if (count > 0)
{
IITArtwork* artwork;
hr = artworkCollection->get_Item(1, &artwork);
if (SUCCEEDED(hr))
{
tmpStr = m_CoverPath.c_str();
hr = artwork->SaveArtworkToFile(tmpStr);
if (FAILED(hr))
{
m_CoverPath.clear();
}
artwork->Release();
}
}
else
{
m_CoverPath.clear();
}
artworkCollection->Release();
}
else
{
m_CoverPath.clear();
}
}
}
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if (m_Measures & MEASURE_LYRICS)
{
FindLyrics();
}
}
}
track->Release();
}
else
{
ClearData();
}
}
/*
** OnStateChange
**
** Called by iTunes event handler on player state change.
**
*/
void CPlayerITunes::OnStateChange(bool playing)
{
if (playing)
{
m_State = PLAYER_PLAYING;
}
else
{
// Guess if paused or stopped from track time
m_State = (m_Position == 0) ? PLAYER_STOPPED : PLAYER_PAUSED;
}
}
/*
** OnVolumeChange
**
** Called by iTunes event handler on volume change.
**
*/
void CPlayerITunes::OnVolumeChange(int volume)
{
m_Volume = volume;
}
/*
** Pause
**
** Handles the Pause bang.
**
*/
void CPlayerITunes::Pause()
{
m_iTunes->Pause();
}
/*
** Play
**
** Handles the Play bang.
**
*/
void CPlayerITunes::Play()
{
m_iTunes->Play();
}
/*
** Stop
**
** Handles the Stop bang.
**
*/
void CPlayerITunes::Stop()
{
m_iTunes->Stop();
}
/*
** Next
**
** Handles the Next bang.
**
*/
void CPlayerITunes::Next()
{
m_iTunes->NextTrack();
}
/*
** Previous
**
** Handles the Previous bang.
**
*/
void CPlayerITunes::Previous()
{
m_iTunes->PreviousTrack();
}
/*
** SetPosition
**
** Handles the SetPosition bang.
**
*/
void CPlayerITunes::SetPosition(int position)
{
m_iTunes->put_PlayerPosition((long)position);
}
/*
** SetRating
**
** Handles the SetRating bang.
**
*/
void CPlayerITunes::SetRating(int rating)
{
IITTrack* track;
HRESULT hr = m_iTunes->get_CurrentTrack(&track);
if (SUCCEEDED(hr))
{
rating *= 20;
track->put_Rating((long)rating);
track->Release();
}
}
/*
** SetVolume
**
** Handles the SetVolume bang.
**
*/
void CPlayerITunes::SetVolume(int volume)
{
m_iTunes->put_SoundVolume((long)volume);
}
/*
** ClosePlayer
**
** Handles the ClosePlayer bang.
**
*/
void CPlayerITunes::ClosePlayer()
{
m_iTunes->Quit();
Uninitialize();
SetTimer(m_CallbackWindow, TIMER_CHECKACTIVE, 500, NULL);
}
/*
** OpenPlayer
**
** Handles the OpenPlayer bang.
**
*/
void CPlayerITunes::OpenPlayer(std::wstring& path)
{
ShellExecute(NULL, L"open", path.empty() ? L"iTunes.exe" : path.c_str(), NULL, NULL, SW_SHOW);
}