axmol/CocosDenshion/win32/MciPlayer.cpp

#include "MciPlayer.h"

#define WIN_CLASS_NAME		"CocosDenshionCallbackWnd"
#define BREAK_IF(cond)      if (cond) break;

namespace CocosDenshion {

static HINSTANCE s_hInstance;
static MCIERROR  s_mciError;

static LRESULT WINAPI _SoundPlayProc(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam);

MciPlayer::MciPlayer()
: m_hWnd(NULL)
, m_hDev(NULL)
, m_nSoundID(0)
, m_uTimes(0)
, m_bPlaying(false)
{
	if (! s_hInstance)
	{
		s_hInstance       = GetModuleHandle( NULL );			// Grab An Instance For Our Window

		WNDCLASS  wc;		// Windows Class Structure

		// Redraw On Size, And Own DC For Window.
		wc.style          = 0;  
		wc.lpfnWndProc    = _SoundPlayProc;					// WndProc Handles Messages
		wc.cbClsExtra     = 0;                              // No Extra Window Data
		wc.cbWndExtra     = 0;								// No Extra Window Data
		wc.hInstance      = s_hInstance;					// Set The Instance
		wc.hIcon          = 0;								// Load The Default Icon
		wc.hCursor        = LoadCursor( NULL, IDC_ARROW );	// Load The Arrow Pointer
		wc.hbrBackground  = NULL;                           // No Background Required For GL
		wc.lpszMenuName   = NULL;                           // We Don't Want A Menu
		wc.lpszClassName  = WIN_CLASS_NAME;                 // Set The Class Name

		if (! RegisterClass(&wc)		// 注册 窗口类 失败
			&& 1410 != GetLastError())		// 并且失败的原因不是窗口类已注册   
		{
			return;
		}
	}

	m_hWnd = CreateWindowEx(
		WS_EX_APPWINDOW,									// Extended Style For The Window
		WIN_CLASS_NAME,										// Class Name
		NULL,										// Window Title
		WS_POPUPWINDOW,/*WS_OVERLAPPEDWINDOW*/               // Defined Window Style
		0, 0,												// Window Position
		0,													// Window Width
		0,													// Window Height
		NULL,												// No Parent Window
		NULL,												// No Menu
		s_hInstance,										// Instance
		NULL );
	if (m_hWnd)
	{
		SetWindowLong(m_hWnd, GWL_USERDATA, (LONG)this);
	}
}

MciPlayer::~MciPlayer()
{
	Close();
	DestroyWindow(m_hWnd);
}

void MciPlayer::Open(const char* pFileName, UINT uId)
{
// 	WCHAR * pBuf = NULL;
	do 
	{
		BREAK_IF(! pFileName || ! m_hWnd);
		int nLen = (int)strlen(pFileName);
		BREAK_IF(! nLen);
// 		pBuf = new WCHAR[nLen + 1];
// 		BREAK_IF(! pBuf);
// 		MultiByteToWideChar(CP_ACP, 0, pFileName, nLen + 1, pBuf, nLen + 1);

		Close();

		MCI_OPEN_PARMS mciOpen = {0};
		MCIERROR mciError;
		mciOpen.lpstrDeviceType = (LPCTSTR)MCI_ALL_DEVICE_ID;
		mciOpen.lpstrElementName = pFileName;

		mciError = mciSendCommand(0,MCI_OPEN, MCI_OPEN_ELEMENT, (DWORD)&mciOpen);
		BREAK_IF(mciError);

		m_hDev = mciOpen.wDeviceID;
		m_nSoundID = uId;
		m_bPlaying = false;
	} while (0);
}

void MciPlayer::Play(UINT uTimes /* = 1 */)
{
	if (! m_hDev)
	{
		return;
	}
	MCI_PLAY_PARMS mciPlay = {0};
	mciPlay.dwCallback = (DWORD_PTR)m_hWnd;
	s_mciError = mciSendCommand(m_hDev,MCI_PLAY, MCI_NOTIFY,(DWORD)&mciPlay);
	if (! s_mciError)
	{
		m_bPlaying = true;
        m_uTimes = uTimes;
	}
}

void MciPlayer::Close()
{
	if (m_bPlaying)
	{
		Stop();
	}
	if (m_hDev)
	{
 		_SendGenericCommand(MCI_CLOSE);
	}
	m_hDev = 0;
	m_bPlaying = false;
}

void MciPlayer::Pause()
{
	_SendGenericCommand(MCI_PAUSE);
}

void MciPlayer::Resume()
{
	_SendGenericCommand(MCI_RESUME);
}

void MciPlayer::Stop()
{
	_SendGenericCommand(MCI_STOP);
	m_bPlaying = false;
}

void MciPlayer::Rewind()
{
	if (! m_hDev)
	{
		return;
	}
	mciSendCommand(m_hDev, MCI_SEEK, MCI_SEEK_TO_START, 0);

	MCI_PLAY_PARMS mciPlay = {0};
	mciPlay.dwCallback = (DWORD)m_hWnd;
	m_bPlaying = mciSendCommand(m_hDev, MCI_PLAY, MCI_NOTIFY,(DWORD)&mciPlay) ? false : true;
}

bool MciPlayer::IsPlaying()
{
    return m_bPlaying;
}

UINT MciPlayer::GetSoundID()
{
    return m_nSoundID;
}

//////////////////////////////////////////////////////////////////////////
// private member
//////////////////////////////////////////////////////////////////////////

void MciPlayer::_SendGenericCommand(int nCommand)
{
	if (! m_hDev)
	{
		return;
	}
	mciSendCommand(m_hDev, nCommand, 0, 0);
}

//////////////////////////////////////////////////////////////////////////
// static function
//////////////////////////////////////////////////////////////////////////

LRESULT WINAPI _SoundPlayProc(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam)
{
	MciPlayer * pPlayer = NULL;
	if (MM_MCINOTIFY == Msg 
		&& MCI_NOTIFY_SUCCESSFUL == wParam
		&&(pPlayer = (MciPlayer *)GetWindowLong(hWnd, GWL_USERDATA)))
	{
		if (pPlayer->m_uTimes)
		{
			--pPlayer->m_uTimes;
		}

		if (pPlayer->m_uTimes)
		{
			mciSendCommand(lParam, MCI_SEEK, MCI_SEEK_TO_START, 0);

			MCI_PLAY_PARMS mciPlay = {0};
			mciPlay.dwCallback = (DWORD)hWnd;
			mciSendCommand(lParam, MCI_PLAY, MCI_NOTIFY,(DWORD)&mciPlay);
		}
		else
		{
			pPlayer->m_bPlaying = false;
		}
		return 0;
	}
	return DefWindowProc(hWnd, Msg, wParam, lParam);
}

} // end of namespace CocosDenshion