// fmt subchunk outputFile.write("fmt ", 4); int fmtSize = 16; outputFile.write(reinterpret_cast<char*>(&fmtSize), 4); short audioFormat = 1; // PCM outputFile.write(reinterpret_cast<char*>(&audioFormat), 2); outputFile.write(reinterpret_cast<char*>(&channels), 2); outputFile.write(reinterpret_cast<char*>(&sampleRate), 4); int byteRate = sampleRate * channels * (bitsPerSample / 8); outputFile.write(reinterpret_cast<char*>(&byteRate), 4); short blockAlign = channels * (bitsPerSample / 8); outputFile.write(reinterpret_cast<char*>(&blockAlign), 2); outputFile.write(reinterpret_cast<char*>(&bitsPerSample), 2); // data subchunk outputFile.write("data", 4); outputFile.write(reinterpret_cast<char*>(&dataSize), 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 wasapi download windows 10
int main() WASAPIRecorder recorder;
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(); // fmt subchunk 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); // fmt subchunk outputFile.write("fmt "