class WASAPIRecorder private: IMMDeviceEnumerator* pEnumerator = nullptr; IMMDevice* pDevice = nullptr; IAudioClient* pAudioClient = nullptr; IAudioCaptureClient* pCaptureClient = nullptr; WAVEFORMATEX* pwfx = nullptr; HANDLE hEvent = nullptr; UINT32 bufferFrameCount = 0; std::ofstream outputFile;

private: void WriteWAVHeader(int dataSize, int sampleRate, int channels, int bitsPerSample) // RIFF chunk outputFile.write("RIFF", 4); int chunkSize = dataSize + 36; outputFile.write(reinterpret_cast<char*>(&chunkSize), 4); outputFile.write("WAVE", 4);

// Initialize COM hr = CoInitializeEx(NULL, COINIT_MULTITHREADED); if (FAILED(hr)) return false; // Create device enumerator hr = CoCreateInstance(__uuidof(MMDeviceEnumerator), NULL, CLSCTX_ALL, __uuidof(IMMDeviceEnumerator), (void**)&pEnumerator); if (FAILED(hr)) return false; // Get default audio device if (captureLoopback) // Capture system output (loopback mode) hr = pEnumerator->GetDefaultAudioEndpoint(eRender, eConsole, &pDevice); else // Capture microphone input hr = pEnumerator->GetDefaultAudioEndpoint(eCapture, eConsole, &pDevice); if (FAILED(hr)) return false; // Activate audio client hr = pDevice->Activate(__uuidof(IAudioClient), CLSCTX_ALL, NULL, (void**)&pAudioClient); if (FAILED(hr)) return false; // Get wave format hr = pAudioClient->GetMixFormat(&pwfx); if (FAILED(hr)) return false; // Initialize audio client REFERENCE_TIME hnsRequestedDuration = 10000000; // 1 second DWORD streamFlags = captureLoopback ? AUDCLNT_STREAMFLAGS_LOOPBACK : 0; streamFlags

void UpdateWAVHeader(const char* filename, UINT32 dataSize) std::ios::out); if (file.is_open()) // Update chunk size file.seekp(4); UINT32 chunkSize = dataSize + 36; file.write(reinterpret_cast<char*>(&chunkSize), 4); // Update data size file.seekp(40); file.write(reinterpret_cast<char*>(&dataSize), 4); file.close();

find_library(ole32_lib ole32) find_library(avrt_lib avrt)

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Wasapi [better] Download Windows 10 May 2026

class WASAPIRecorder private: IMMDeviceEnumerator* pEnumerator = nullptr; IMMDevice* pDevice = nullptr; IAudioClient* pAudioClient = nullptr; IAudioCaptureClient* pCaptureClient = nullptr; WAVEFORMATEX* pwfx = nullptr; HANDLE hEvent = nullptr; UINT32 bufferFrameCount = 0; std::ofstream outputFile;

private: void WriteWAVHeader(int dataSize, int sampleRate, int channels, int bitsPerSample) // RIFF chunk outputFile.write("RIFF", 4); int chunkSize = dataSize + 36; outputFile.write(reinterpret_cast<char*>(&chunkSize), 4); outputFile.write("WAVE", 4); wasapi download windows 10

// Initialize COM hr = CoInitializeEx(NULL, COINIT_MULTITHREADED); if (FAILED(hr)) return false; // Create device enumerator hr = CoCreateInstance(__uuidof(MMDeviceEnumerator), NULL, CLSCTX_ALL, __uuidof(IMMDeviceEnumerator), (void**)&pEnumerator); if (FAILED(hr)) return false; // Get default audio device if (captureLoopback) // Capture system output (loopback mode) hr = pEnumerator->GetDefaultAudioEndpoint(eRender, eConsole, &pDevice); else // Capture microphone input hr = pEnumerator->GetDefaultAudioEndpoint(eCapture, eConsole, &pDevice); if (FAILED(hr)) return false; // Activate audio client hr = pDevice->Activate(__uuidof(IAudioClient), CLSCTX_ALL, NULL, (void**)&pAudioClient); if (FAILED(hr)) return false; // Get wave format hr = pAudioClient->GetMixFormat(&pwfx); if (FAILED(hr)) return false; // Initialize audio client REFERENCE_TIME hnsRequestedDuration = 10000000; // 1 second DWORD streamFlags = captureLoopback ? AUDCLNT_STREAMFLAGS_LOOPBACK : 0; streamFlags IMMDevice* pDevice = nullptr

void UpdateWAVHeader(const char* filename, UINT32 dataSize) std::ios::out); if (file.is_open()) // Update chunk size file.seekp(4); UINT32 chunkSize = dataSize + 36; file.write(reinterpret_cast<char*>(&chunkSize), 4); // Update data size file.seekp(40); file.write(reinterpret_cast<char*>(&dataSize), 4); file.close(); IAudioClient* pAudioClient = nullptr

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