我正在尝试通过 WASAPI 工具启动并运行输入音频流记录样本。这是我的意思的链接：http: //msdn.microsoft.com/en-us/library/windows/desktop/dd370800 (v=vs.85).aspx
以下是相关代码：
#include "InputTest.h"
#include "Audioclient.h"
#include "Mmdeviceapi.h"
void InputTest::TakeInput()
{
HRESULT hr;
//Parameter variables for stream initialization
AUDCLNT_SHAREMODE ShareMode = AUDCLNT_SHAREMODE_SHARED;
DWORD da = 0;
REFERENCE_TIME bufferDuration = 10;
REFERENCE_TIME periodicity = 5;
WAVEFORMATEX pFormat;
LPCGUID AudioSessionGuid = NULL;
GUID guid2 = *AudioSessionGuid;
HRESULT guidError = UuidCreate(&guid2); //could do some error checking here. //project -> properties -> Linker -> Command Line -> Rpctr4.lib
//guid2 now has a generated value
//give ASG the address of the newly generated guid2
AudioSessionGuid = &guid2;
//Instantiate WaveFormat
pFormat.wFormatTag = WAVE_FORMAT_PCM;
pFormat.cbSize = 10; //extra information sent over stream. Usually ignored in PCM format.
//If wFormatTag is WAVE_FORMAT_PCM, nAvgBytesPerSec must equal nSamplesPerSec × nBlockAlign
pFormat.nAvgBytesPerSec = 0;
pFormat.nSamplesPerSec = 0;
pFormat.nBlockAlign = 0;
pFormat.nChannels = 2;
pFormat.wBitsPerSample = 16; //PCM standard
//Pointer for stored audio stream
IAudioClient *iac = NULL;
//Endpoint device selection
IMMDeviceEnumerator *pEnumerator = NULL;
IMMDevice *pDevice = NULL;
HRESULT de;
de = pEnumerator -> GetDefaultAudioEndpoint(eRender, eConsole, &pDevice);
hr = iac -> IAudioClient::Initialize(ShareMode, da, bufferDuration, periodicity, &pFormat, AudioSessionGuid);
}`
完整的错误信息：
error LNK2019: unresolved external symbol "public: virtual long __stdcall
IAudioClient::Initialize(enum _AUDCLNT_SHAREMODE,unsigned long,__int64,__int64,struct
tWAVEFORMATEX const *,struct _GUID const *)" (?
Initialize@IAudioClient@@UAGJW4_AUDCLNT_SHAREMODE@@K_J1PBUtWAVEFORMATEX@@PBU_GUID@@@Z)
referenced in function "public: void __thiscall InputTest::TakeInput(void)" (?
TakeInput@InputTest@@QAEXXZ)
任何建议都非常感谢，因为我现在正在阅读一本好的 C++ 实践书。这个错误是怎么回事？