//-----------------------------------------------------------------------------
// 文件名: MusicTool.cpp
//
// 描  述: 使用DirectMusic，播放主片段
//-----------------------------------------------------------------------------
#define STRICT
#include <windows.h>
#include <basetsd.h>
#include <commdlg.h>
#include <commctrl.h>
#include <dmusicc.h>
#include <dmusici.h>
#include <dmusicf.h>
#include <dxerr9.h>
#include <cguid.h>
#include <tchar.h>
#include <stdio.h>
#include "resource.h"
#include "DMUtil.h"
#include "DXUtil.h"
#include "EchoTool.h"
#include "MeasTool.h"





INT_PTR CALLBACK MainDlgProc( HWND hDlg, UINT msg, WPARAM wParam, LPARAM lParam );
HRESULT OnInitDialog( HWND hDlg );
HRESULT ProcessDirectMusicMessages( HWND hDlg );
VOID    OnOpenSoundFile( HWND hDlg );
HRESULT LoadSegmentFile( HWND hDlg, TCHAR* strFileName );
HRESULT OnPlaySegment( HWND hDlg );
VOID    EnablePlayUI( HWND hDlg, BOOL bEnable );
HRESULT OnChangeTool( HWND hDlg );




HINSTANCE               g_hInst                 = NULL;
CMusicManager*          g_pMusicManager         = NULL;
CMusicSegment*          g_pMusicSegment         = NULL;
CEchoTool*              g_pEchoTool             = NULL;
CMeasureTool*           g_pMeasureTool1         = NULL;
CMeasureTool*           g_pMeasureTool2         = NULL;
IDirectMusicTool*       g_pCurrentTool          = NULL;
IDirectMusicGraph*      g_pGraph                = NULL;
HANDLE                  g_hDMusicMessageEvent   = NULL;




//-----------------------------------------------------------------------------
// 函數(shù)名: WinMain()
// 描  述: 應用程序的入口。使用簡單的對話框與用戶交互 
//-----------------------------------------------------------------------------
INT APIENTRY WinMain( HINSTANCE hInst, HINSTANCE hPrevInst, LPSTR pCmdLine, 
                      INT nCmdShow )
{
    HWND    hDlg = NULL;
    BOOL    bDone = FALSE;
    int     nExitCode = 0;
    HRESULT hr; 
    DWORD   dwResult;
    MSG     msg;

    g_hInst = hInst;

    // 顯示主對話框。
    hDlg = CreateDialog( hInst, MAKEINTRESOURCE(IDD_MAIN), 
                         NULL, MainDlgProc );

    while( !bDone ) 
    { 
        dwResult = MsgWaitForMultipleObjects( 1, &g_hDMusicMessageEvent, 
                                              FALSE, INFINITE, QS_ALLEVENTS );
        switch( dwResult )
        {
            case WAIT_OBJECT_0 + 0:
                // 發(fā)信號給g_hDPMessageEvent，因此有可用的messages消息。
                if( FAILED( hr = ProcessDirectMusicMessages( hDlg ) ) ) 
                {
                    DXTRACE_ERR_MSGBOX( TEXT("ProcessDirectMusicMessages"), hr );
                    return FALSE;
                }
                break;

            case WAIT_OBJECT_0 + 1:
                // Windows消息可用。
                while( PeekMessage( &msg, NULL, 0, 0, PM_REMOVE ) ) 
                { 
                    if( !IsDialogMessage( hDlg, &msg ) )  
                    {
                        TranslateMessage( &msg ); 
                        DispatchMessage( &msg ); 
                    }

                    if( msg.message == WM_QUIT )
                    {
                        nExitCode = (int)msg.wParam;
                        bDone     = TRUE;
                        DestroyWindow( hDlg );
                    }
                }
                break;
        }
    }

    return nExitCode;
}


//-----------------------------------------------------------------------------
// 函數(shù)名: MainDlgProc()
// 描  述: 處理對話框消息
//-----------------------------------------------------------------------------
INT_PTR CALLBACK MainDlgProc( HWND hDlg, UINT msg, WPARAM wParam, LPARAM lParam )
{
    HRESULT hr;

    switch( msg ) 
    {
        case WM_INITDIALOG:
            if( FAILED( hr = OnInitDialog( hDlg ) ) )
            {
                DXTRACE_ERR_MSGBOX( TEXT("OnInitDialog"), hr );
                MessageBox( hDlg, "Error initializing DirectMusic.  Sample will now exit.", 
                                  "DirectMusic Sample", MB_OK | MB_ICONERROR );
                PostQuitMessage( IDABORT );
                return FALSE;
            }

            break;

        case WM_COMMAND:
            switch( LOWORD(wParam) )
            {
                case IDC_SOUNDFILE:
                    OnOpenSoundFile( hDlg );
                    break;

                case IDCANCEL:
                    PostQuitMessage( IDCANCEL );
                    break;

                case IDC_PLAY:
                    if( FAILED( hr = OnPlaySegment( hDlg ) ) )
                    {
                        DXTRACE_ERR_MSGBOX( TEXT("OnPlaySegment"), hr );
                        MessageBox( hDlg, "Error playing DirectMusic segment. "
                                    "Sample will now exit.", "DirectMusic Sample", 
                                    MB_OK | MB_ICONERROR );
                        PostQuitMessage( IDABORT );
                    }
                    break;

                case IDC_STOP:
                    // 播放片段時，簡單調用Stop()不會停止任何MIDI sustain pedals, 
					// 但調用StopAll()可以。
                    if( g_pMusicManager )
                        g_pMusicManager->StopAll(); 
                    EnablePlayUI( hDlg, TRUE );
                    break;

                case IDC_TOOL_COMBO:
                    OnChangeTool( hDlg );
                    break;

                case IDHELP:
                    DXUtil_LaunchReadme( hDlg );
                    break;

                default:
					// 不處理消息
                    return FALSE; 
            }
            break;

        case WM_DESTROY:
            // 清除一切
            SAFE_RELEASE( g_pGraph );
            SAFE_DELETE( g_pMusicSegment );
            SAFE_DELETE( g_pMusicManager );
            SAFE_DELETE( g_pEchoTool );
            SAFE_DELETE( g_pMeasureTool1 );
            SAFE_DELETE( g_pMeasureTool2 );
            CloseHandle( g_hDMusicMessageEvent );
            break; 

        default:
			// 不處理消息
            return FALSE; 
    }

    return TRUE; 
}




//-----------------------------------------------------------------------------
// 函數(shù)名: OnInitDialog()
// 描  述: 初始化對話框(建立UI控制等)
//-----------------------------------------------------------------------------
HRESULT OnInitDialog( HWND hDlg )
{
    HRESULT hr;
    LONG lIndex;

    // 為對話框設置icon
    HICON hIcon = LoadIcon( g_hInst, MAKEINTRESOURCE( IDR_MAINFRAME ) );
    SendMessage( hDlg, WM_SETICON, ICON_BIG,   (LPARAM) hIcon );  // 設置大icon
    SendMessage( hDlg, WM_SETICON, ICON_SMALL, (LPARAM) hIcon );  // 設置小icon

    g_hDMusicMessageEvent = CreateEvent( NULL, FALSE, FALSE, NULL );
    g_pMusicManager = new CMusicManager();
    if( NULL == g_pMusicManager )
        return E_OUTOFMEMORY;

    // 使用缺省音軌初始化DirectMusic
    hr = g_pMusicManager->Initialize( hDlg );
    if( FAILED(hr) )
        return DXTRACE_ERR_MSGBOX( TEXT("Initialize"), hr );
    
    IDirectMusicPerformance8* pPerformance    = g_pMusicManager->GetPerformance();
    IDirectMusicAudioPath8* pDefaultAudioPath = g_pMusicManager->GetDefaultAudioPath();

    // 產(chǎn)生一個DirectMusicGraph,并告知相關的參數(shù)
    hr = pDefaultAudioPath->GetObjectInPath( 0, DMUS_PATH_PERFORMANCE_GRAPH, 0,
                                             GUID_NULL, 0, IID_IDirectMusicGraph, 
                                             (LPVOID*) &g_pGraph );

    SAFE_RELEASE( pDefaultAudioPath );

    if( FAILED( hr ) )
        return DXTRACE_ERR_MSGBOX( TEXT("GetObjectInPath"), hr );

    // 注冊片段通知
    if( FAILED( hr = pPerformance->AddNotificationType( GUID_NOTIFICATION_SEGMENT ) ) )
        return DXTRACE_ERR_MSGBOX( TEXT("AddNotificationType"), hr );

    if( FAILED( hr = pPerformance->AddNotificationType( GUID_NOTIFICATION_MEASUREANDBEAT) ) )
        return DXTRACE_ERR_MSGBOX( TEXT("AddNotificationType"), hr );

    if( FAILED( hr = pPerformance->SetNotificationHandle( g_hDMusicMessageEvent, 0 ) ) )
        return DXTRACE_ERR_MSGBOX( TEXT("SetNotificationHandle"), hr );

    g_pEchoTool = new CEchoTool();
    if( NULL == g_pEchoTool )
        return E_OUTOFMEMORY;
    g_pMeasureTool1 = new CMeasureTool(hDlg);
    if( NULL == g_pMeasureTool1 )
        return E_OUTOFMEMORY;
    g_pMeasureTool2 = new CMeasureTool(hDlg);
    if( NULL == g_pMeasureTool2 )
        return E_OUTOFMEMORY;

    // 初始化UI
    HWND hToolCombo = GetDlgItem( hDlg, IDC_TOOL_COMBO );
    lIndex = (LONG)SendMessage( hToolCombo, CB_ADDSTRING, 0, (LPARAM) TEXT("無") );
    SendMessage( hToolCombo, CB_SETITEMDATA, lIndex, (LPARAM) NULL );
    lIndex = (LONG)SendMessage( hToolCombo, CB_ADDSTRING, 0, (LPARAM) TEXT("Echo工具") );
    SendMessage( hToolCombo, CB_SETITEMDATA, lIndex, (LPARAM) (IDirectMusicTool*) g_pEchoTool );
    lIndex = (LONG)SendMessage( hToolCombo, CB_ADDSTRING, 0, (LPARAM) TEXT("Measure工具") );
    SendMessage( hToolCombo, CB_SETITEMDATA, lIndex, (LPARAM) (IDirectMusicTool*) g_pMeasureTool1 );
    SendMessage( hToolCombo, CB_SETCURSEL, 0, 0 );

    // 裝載缺省的音頻片段 
    TCHAR strFileName[MAX_PATH+1];
    DXUtil_GetDXSDKMediaPathCb( strFileName, sizeof(strFileName) );
    strcat( strFileName, "sample.sgt" );
    if( S_FALSE == LoadSegmentFile( hDlg, strFileName ) )
    {
        // 設置UI控制
        SetDlgItemText( hDlg, IDC_FILENAME, TEXT("No file loaded.") );
    }
    else
    {
        IDirectMusicSegment8*   pPrimarySegment8;
        DMUS_TEMPO_PARAM        tempo;
        MUSIC_TIME              mtTime = 0;

        pPrimarySegment8 = g_pMusicSegment->GetSegment();

        tempo.mtTime = 0;
        tempo.dblTempo = 70.;