Question

所以我正在阅读Jonathan S. Harbour的“Beginning Game Programming Third Edition”，我已经到了教他们如何使用Direct Sound的地步。本书使用了自己的DirectSound.h和DirectSound.cpp文件，这些文件来自以前版本的DirectX SDK，但是当我尝试编译时，我得到“LNK2019：未解析的外部符号”错误。

1＆gt; DirectSound.obj：错误LNK2019：未解析的外部符号   _DXTraceA @ 20在函数“public：long thiscall CSoundManager :: Initialize（struct HWND *，unsigned long）”中引用   （？初始化@ @@ CSoundManager __ QAEJPAUHWND @@沃顿Z）

1＆gt; DirectSound.obj：错误LNK2019：未解析的外部符号   _DirectSoundCreate8 @ 12在函数“public：long thiscall CSoundManager :: Initialize（struct HWND *，unsigned long）”中引用   （？初始化@ @@ CSoundManager __ QAEJPAUHWND @@沃顿Z）

我还没有在我的项目中实现任何Direct Sound代码，仅仅存在这些文件会导致项目无法编译。没有它们，项目就可以完美地编译和运行。

#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是关于添加丢失的库 - 一个典型问题。您应该识别缺失的符号，然后识别要另外链接的库，然后使用#pragma或通过项目设置添加它。

同样，由于它是一个初学者问题，很可能Stack Overflow已经有了密切相关的东西。始终确保搜索它，将代码片段与您的代码片段进行比较。

相关问题表明您需要链接dsound.lib和dxerr.lib。

错误LNK2019：未解析的外部符号Direct Sound

1 个答案: