错误LNK2019：无法解析的外部符号直接声音

Question

因此，我正在阅读乔纳森·S·哈伯（Jonathan S. Harbour）撰写的“ Beginning Game Programming Third Edition”（开始游戏编程第三版），现在我已经了解到他教我们如何使用直接声音。 这本书使用了自己的DirectSound.h和DirectSound.cpp文件，它们来自DirectX SDK的早期版本，但是当我尝试编译时，出现“ LNK2019：无法解析的外部符号”错误。

1> DirectSound.obj：错误LNK2019：在函数“ public：long thiscall CSoundManager :: Initialize（struct HWND *，unsigned long）”中引用的未解析的外部符号_DXTraceA @ 20（？Initialize @ CSoundManager @@ QAEJPAUHWND __ @@ K @ Z）

1> DirectSound.obj：错误LNK2019：在函数“ public：long thiscall CSoundManager :: Initialize（struct HWND *，unsigned long）”中引用了未解析的外部符号_DirectSoundCreate8 @ 12（？Initialize @ CSoundManager @@ QAEJPAUHWND __ @@ K @ Z）

到目前为止，我尚未在项目中实现任何直接声音代码，这些文件的存在会导致项目无法编译。 没有它们，该项目将编译并完美运行。

#ifndef DSUTIL_H
#define DSUTIL_H

#include <windows.h>
#include <mmsystem.h>
#include <mmreg.h>
#include <dsound.h>

class CSoundManager;
class CSound;
class CStreamingSound;
class CWaveFile;

#define WAVEFILE_READ   1
#define WAVEFILE_WRITE  2

#define DSUtil_StopSound(s)         { if(s) s->Stop(); }
#define DSUtil_PlaySound(s)         { if(s) s->Play( 0, 0 ); }
#define DSUtil_PlaySoundLooping(s)  { if(s) s->Play( 0, DSBPLAY_LOOPING ); }


//-----------------------------------------------------------------------------
// Name: class CSoundManager
// Desc: 
//-----------------------------------------------------------------------------
class CSoundManager
{
protected:
    LPDIRECTSOUND8 m_pDS;

public:
    CSoundManager();
    ~CSoundManager();

    HRESULT Initialize(HWND  hWnd, DWORD dwCoopLevel);
    inline  LPDIRECTSOUND8 GetDirectSound() { return m_pDS; }
    HRESULT SetPrimaryBufferFormat( DWORD dwPrimaryChannels, DWORD dwPrimaryFreq, DWORD dwPrimaryBitRate );

    HRESULT Create( CSound** ppSound, LPTSTR strWaveFileName, DWORD dwCreationFlags = 0, GUID guid3DAlgorithm = GUID_NULL, DWORD dwNumBuffers = 1 );
};




//-----------------------------------------------------------------------------
// Name: class CSound
// Desc: Encapsulates functionality of a DirectSound buffer.
//-----------------------------------------------------------------------------
class CSound
{
protected:
    LPDIRECTSOUNDBUFFER* m_apDSBuffer;
    DWORD                m_dwDSBufferSize;
    CWaveFile*           m_pWaveFile;
    DWORD                m_dwNumBuffers;
    DWORD                m_dwCreationFlags;

    HRESULT RestoreBuffer( LPDIRECTSOUNDBUFFER pDSB, BOOL* pbWasRestored );

public:
    CSound( LPDIRECTSOUNDBUFFER* apDSBuffer, DWORD dwDSBufferSize, DWORD dwNumBuffers, CWaveFile* pWaveFile, DWORD dwCreationFlags );
    virtual ~CSound();

    HRESULT FillBufferWithSound( LPDIRECTSOUNDBUFFER pDSB, BOOL bRepeatWavIfBufferLarger );
    LPDIRECTSOUNDBUFFER GetFreeBuffer();

    HRESULT Play( DWORD dwPriority = 0, DWORD dwFlags = 0, LONG lVolume = 0, LONG lFrequency = -1, LONG lPan = 0 );
    HRESULT Stop();
    HRESULT Reset();
    BOOL    IsSoundPlaying();
};


//-----------------------------------------------------------------------------
// Name: class CWaveFile
// Desc: Encapsulates reading or writing sound data to or from a wave file
//-----------------------------------------------------------------------------
class CWaveFile
{
public:
    WAVEFORMATEX* m_pwfx;        // Pointer to WAVEFORMATEX structure
    HMMIO         m_hmmio;       // MM I/O handle for the WAVE
    MMCKINFO      m_ck;          // Multimedia RIFF chunk
    MMCKINFO      m_ckRiff;      // Use in opening a WAVE file
    DWORD         m_dwSize;      // The size of the wave file
    MMIOINFO      m_mmioinfoOut;
    DWORD         m_dwFlags;
    BOOL          m_bIsReadingFromMemory;
    BYTE*         m_pbData;
    BYTE*         m_pbDataCur;
    ULONG         m_ulDataSize;
    CHAR*         m_pResourceBuffer;

protected:
    HRESULT ReadMMIO();
    HRESULT WriteMMIO( WAVEFORMATEX *pwfxDest );

public:
    CWaveFile();
    ~CWaveFile();

    HRESULT Open( LPTSTR strFileName, WAVEFORMATEX* pwfx, DWORD dwFlags );
    HRESULT Close();

    HRESULT Read( BYTE* pBuffer, DWORD dwSizeToRead, DWORD* pdwSizeRead );
    HRESULT Write( UINT nSizeToWrite, BYTE* pbData, UINT* pnSizeWrote );

    DWORD   GetSize();
    HRESULT ResetFile();
    WAVEFORMATEX* GetFormat() { return m_pwfx; };
};
#endif // DSUTIL_H
///////////////////////////////////////////////////////////////////////////////
// The function that causes the error

HRESULT CSoundManager::Initialize(HWND hWnd, DWORD dwCoopLevel)
{
    HRESULT hr;

    SAFE_RELEASE(m_pDS);

    // Create IDirectSound using the primary sound device
    if(FAILED(hr = DirectSoundCreate8(NULL, &m_pDS, NULL)))
        return DXTRACE_ERR(TEXT("DirectSoundCreate8"), hr);

    // Set DirectSound coop level 
    if( FAILED( hr = m_pDS->SetCooperativeLevel( hWnd, dwCoopLevel ) ) )
        return DXTRACE_ERR( TEXT("SetCooperativeLevel"), hr );   

    return S_OK;
}

Answer 1

错误LNK2019与添加缺少的库有关-这是一个典型的问题。 您应该确定丢失的符号，然后确定要附加链接的库，然后使用#pragma或通过项目设置将其添加。

同样，这是一个初学者的问题，很可能Stack Overflow已经有一些密切相关的东西。 始终确保对其进行搜索，将代码段与您的代码段进行比较。

• 应用程序可在Visual Studio中运行，但发行/调试exe不能运行
• DXTrace应该包括哪个标题？

相关问题表明，您需要链接dsound.lib和dxerr.lib。