c++实现的简单音乐播放器

================================================================================ MICROSOFT FOUNDATION CLASS LIBRARY : SoundStudio Project Overview =============================================================================== The application wizard has created this SoundStudio application for you. This application not only demonstrates the basics of using the Microsoft Foundation Classes but is also a starting point for writing your application. This file contains a summary of what you will find in each of the files that make up your SoundStudio application. SoundStudio.vcproj This is the main project file for VC++ projects generated using an application wizard. It contains information about the version of Visual C++ that generated the file, and information about the platforms, configurations, and project features selected with the application wizard. SoundStudio.h This is the main header file for the application. It includes other project specific headers (including Resource.h) and declares the CSoundStudioApp application class. SoundStudio.cpp This is the main application source file that contains the application class CSoundStudioApp. SoundStudio.rc This is a listing of all of the Microsoft Windows resources that the program uses. It includes the icons, bitmaps, and cursors that are stored in the RES subdirectory. This file can be directly edited in Microsoft Visual C++. Your project resources are in 1033. res\SoundStudio.ico This is an icon file, which is used as the application's icon. This icon is included by the main resource file SoundStudio.rc. res\SoundStudio.rc2 This file contains resources that are not edited by Microsoft Visual C++. You should place all resources not editable by the resource editor in this file. ///////////////////////////////////////////////////////////////////////////// The application wizard creates one dialog class: SoundStudioDlg.h, SoundStudioDlg.cpp - the dialog These files contain your CSoundStudioDlg class. This class defines the behavior of your application's main dialog. The dialog's template is in SoundStudio.rc, which can be edited in Microsoft Visual C++. ///////////////////////////////////////////////////////////////////////////// Other Features: ActiveX Controls The application includes support to use ActiveX controls. ///////////////////////////////////////////////////////////////////////////// Other standard files: StdAfx.h, StdAfx.cpp These files are used to build a precompiled header (PCH) file named SoundStudio.pch and a precompiled types file named StdAfx.obj. Resource.h This is the standard header file, which defines new resource IDs. Microsoft Visual C++ reads and updates this file. SoundStudio.manifest Application manifest files are used by Windows XP to describe an applications dependency on specific versions of Side-by-Side assemblies. The loader uses this information to load the appropriate assembly from the assembly cache or private from the application. The Application manifest maybe included for redistribution as an external .manifest file that is installed in the same folder as the application executable or it may be included in the executable in the form of a resource. ///////////////////////////////////////////////////////////////////////////// Other notes: The application wizard uses "TODO:" to indicate parts of the source code you should add to or customize. If your application uses MFC in a shared DLL, you will need to redistribute the MFC DLLs. If your application is in a language other than the operating system's locale, you will also have to redistribute the corresponding localized resources MFC80XXX.DLL. For more information on both of these topics, please see the section on redistributing Visual C++ applications in MSDN documentation. ///////////////////////////////////////////////////////////////////////////// const LONGLONG MILLISECONDS = (1000); // 10 ^ 3 const LONGLONG NANOSECONDS = (1000000000); // 10 ^ 9 const LONGLONG UNITS = (NANOSECONDS / 100); // 10 ^ 7 inline LONGLONG WINAPI ConvertToMilliseconds(const REFERENCE_TIME& RT) { /* This converts an arbitrary value representing a reference time into a MILLISECONDS value for use in subsequent system calls */ return (RT / (UNITS / MILLISECONDS)); } WaveBuffer waveBuffer[2]; WaveOutDevice waveOutput; MMAudioStream mmAudio; MultimediaStream mmStream; HRESULT hr; hr = mmStream.Initialize(STREAMTYPE_READ, AMMSF_NOGRAPHTHREAD, NULL); if ( SUCCEEDED(hr) ) { CComPtr<IMediaStream> pAudioStream; hr = mmStream.AddMediaStream(NULL, &MSPID_PrimaryAudio, 0, &pAudioStream); hr = mmStream.OpenFile( _T(".\\Monster.mp3"), AMMSF_RUN); if ( SUCCEEDED(hr) ) { waveBuffer[0].Allocate(4096); waveBuffer[1].Allocate(4096); hr = mmAudio.SetMediaStream(pAudioStream); WaveFormat wfmt = mmAudio.GetWaveFormat(); hr = waveOutput.Open(WAVE_MAPPER, wfmt); if ( SUCCEEDED(hr) ) { DWORD dwBytes; REFERENCE_TIME tStart, tEnd, tCurrent; int index = 0; do { WaveBuffer& curBuffer = waveBuffer[index%2]; dwBytes = curBuffer.GetBufferLength(); hr = mmAudio.GetSampleData(reinterpret_cast<LPBYTE>(curBuffer.GetBuffer()), dwBytes); if ( SUCCEEDED(hr) ) { mmAudio.GetSampleTimes(&tStart, &tEnd, &tCurrent); ATLTRACE(_T("tStart:%d tEnd:%d - Current:%d (%d bytes)\n"), (ULONG)ConvertToMilliseconds(tStart), (ULONG)ConvertToMilliseconds(tEnd), (ULONG)ConvertToMilliseconds(tCurrent), dwBytes); HRESULT whr; if ( index >= 2 ) { whr = waveOutput.UnprepareBuffer( curBuffer ); } whr = waveOutput.PrepareBuffer( curBuffer ); whr = waveOutput.AddBuffer( curBuffer ); if ( index == 0 ) { whr = waveOutput.Start(); } Sleep( (DWORD)ConvertToMilliseconds(tEnd-tStart) ); } ++index; } while( hr == S_OK ); Sleep(1000); waveOutput.Stop(); } } }