WindowsAPIによる録音と再生

レコーディング
1、初期化

	memset(&hWaveIn, 0, sizeof(HWAVEIN));
	memset(&waveForm, 0, sizeof(WAVEFORMATEX));

	if (getAudioDevices())   //        
	{
		//      
		setWaveFormat(&waveForm, 2, 44100, 16);

		//        
		for (int i = 0; i < 2; ++i)
		{
			whdr[i].lpData = (CHAR*)malloc(bufLength);
			memset(whdr[i].lpData, 0, bufLength);
			whdr[i].dwBufferLength = bufLength;	//     
			whdr[i].dwBytesRecorded = 0;		//      ，           
			whdr[i].dwUser = 0;				   	//       
			whdr[i].dwFlags = 0;				//   
			whdr[i].dwLoops = 0;				//   
			whdr[i].lpNext = NULL;				//   
			whdr[i].reserved = 0;				//   
		}
	}

bool InputSound::getAudioDevices()
{
	//        
	int count = 0;
	count = waveInGetNumDevs();
	if (count == 0)
	{
		printf("        ，     
");
		return false;
	}
	printf("         ：%d
", count);
	
	//       
	WAVEINCAPS waveIncaps;
	MMRESULT mmResult = waveInGetDevCaps(0, &waveIncaps, sizeof(WAVEINCAPS));
	if (mmResult != MMSYSERR_NOERROR)
	{
		printf("        
");
		return false;
	}
	//printf("      ：%s
", waveIncaps.szPname);
	std::cout << "      ：" << waveIncaps.szPname << std::endl;

	return true;
}

2、録音のパラメータを設定する

void InputSound::setWaveFormat(LPWAVEFORMATEX waveformat, WORD nCh, DWORD nSampleRate, WORD BitsPerSample)
{
	waveformat->wFormatTag = WAVE_FORMAT_PCM;
	waveformat->nChannels = nCh;	//   
	waveformat->nSamplesPerSec = nSampleRate;	//   
	waveformat->nAvgBytesPerSec = nSampleRate * nCh * BitsPerSample / 8;	//     
	waveformat->nBlockAlign = nCh * BitsPerSample / 8;	//     
	waveformat->wBitsPerSample = BitsPerSample;		//    
	waveformat->cbSize = 0;
}

3、レコーディング開始

void InputSound::startRecording()
{
	try
	{
		MMRESULT mmResult = waveInOpen(&hWaveIn, WAVE_MAPPER, &waveForm, (DWORD)waveInProc, (DWORD)this, CALLBACK_FUNCTION);
		if (mmResult != MMSYSERR_NOERROR)
		{
			printf("      
");
			return;
		}
		 
		waveInPrepareHeader(hWaveIn, &whdr[0], sizeof(WAVEHDR));	//     
		waveInPrepareHeader(hWaveIn, &whdr[1], sizeof(WAVEHDR));


		//    
		waveInAddBuffer(hWaveIn, &whdr[0], sizeof(WAVEHDR));		//     
		waveInAddBuffer(hWaveIn, &whdr[1], sizeof(WAVEHDR));

		//        
		waveInStart(hWaveIn);
		isStop = FALSE;

		printf("    
");
	}
	catch (...)
	{
		printf("    
");
	}
	return;
}

4、コールバック処理は、データをファイルに書き込んだ後、バッファをクリアし、録音装置に再追加する必要があることに注意する.

DWORD CALLBACK InputSound::waveInProc(HWAVEIN hwavein, UINT uMsg, DWORD dwInstance, DWORD dwParam1, DWORD dwParam2)
{
	InputSound* inputSound = (InputSound*)dwInstance;
	char buf[bufLength] = {0};
	switch (uMsg)
	{
	case WIM_OPEN:		//      
		printf("      
");
		break;

	case WIM_DATA:		//         
		memcpy(&buf, ((LPWAVEHDR)dwParam1)->lpData, bufLength);	//      
		
		FILE *pf;
		fopen_s(&pf, "./RecordSounds.pcm", "ab+");

		if (strlen(buf))
		{
			//    
			fwrite(buf, 1, ((LPWAVEHDR)dwParam1)->dwBufferLength, pf);
		}


		if (inputSound->isStop != TRUE)
		{
			//      
			memset(((LPWAVEHDR)dwParam1)->lpData, 0, bufLength);
			((LPWAVEHDR)dwParam1)->dwBytesRecorded = 0;

			waveInAddBuffer(hwavein, (PWAVEHDR)dwParam1, sizeof(WAVEHDR));				//      
		}

		fclose(pf);
		break;

	case WIM_CLOSE:		//    
		printf("      
");
		break;

	default:
		break;
	}
	return 0;
}

5、録音を止める

void InputSound::stopRocording()
{
	try
	{
		isStop = TRUE;
		//    
		waveInStop(hWaveIn);
		waveInReset(hWaveIn);

		//     
		waveInUnprepareHeader(hWaveIn, &whdr[0], sizeof(WAVEHDR));
		waveInUnprepareHeader(hWaveIn, &whdr[1], sizeof(WAVEHDR));
		
		printf("    
");
		//    
		waveInClose(hWaveIn);

	}
	catch (...)
	{
		printf("    
");
	}
	return;
	
}

再生
1、ここで初期化するとき、dwUserという変数を1つのデータが再生されたかどうかのマークにします.getAudioDevices()、setWaveFormat()の2つの関数は、録音中の処理と似ています.

if (getAudioDevices())
	{
		//      
		setWaveFormat(&waveForm, 2, 44100, 16);

		for (int i = 0; i < 2; ++i)
		{
			whdr[i].lpData = (CHAR*)malloc(bufLength);
			memset(whdr[i].lpData, 0, bufLength);
			whdr[i].dwBufferLength = bufLength;	//     
			whdr[i].dwBytesRecorded = 0;		//      ，           
			whdr[i].dwUser = 0;				//       ，0     ，1     
			whdr[i].dwFlags = 0;				//   
			whdr[i].dwLoops = 0;				//   
			whdr[i].lpNext = NULL;				//   
			whdr[i].reserved = 0;				//   
		}
	}

2、放送開始

void OutputSound::startPlaying()
{
	try
	{
		MMRESULT mmResult = waveOutOpen(&hWaveOut, WAVE_MAPPER, &waveForm, (DWORD)waveOutProc, (DWORD)this, CALLBACK_FUNCTION);
		if (mmResult != MMSYSERR_NOERROR)
		{
			printf("      
");
			return;
		}

		
		FILE *pf;
		fopen_s(&pf, "./RecordSounds.pcm", "rb");


		while (true)
		{
			for (int i = 0; i < 2; ++i)
			{
				if (whdr[i].dwUser != 1)	//    ，     
				{
					char buf[bufLength] = { 0 };
					//whdr[i].dwBufferLength = fread(&buf, sizeof(char), bufLength, pf);
					fread(&buf, bufLength, 1, pf);
					memcpy(whdr[i].lpData, &buf, bufLength);
					whdr[i].dwUser = 1;

					waveOutPrepareHeader(hWaveOut, &whdr[i], sizeof(WAVEHDR));//    
					waveOutWrite(hWaveOut, &whdr[i], sizeof(WAVEHDR));		//     
				}

			}

			if (feof(pf))
			{
				printf("    
");
			
			
				Sleep(1000);
				waveOutClose(hWaveOut);
				break;
			}
		}
		
		fclose(pf);
	}
	catch (...)
	{
		printf("    
");
	}
	return;
}

3、コールバック処理

DWORD CALLBACK OutputSound::waveOutProc(HWAVEOUT hwaveOut, UINT uMsg, DWORD dwInstance, DWORD dwParam1, DWORD dwParam2)
{
	LPWAVEHDR phdr = (LPWAVEHDR)dwParam1;
	switch (uMsg)
	{
	case WOM_OPEN:
		printf("      
");
		break;

	case WOM_DONE:
		//    ，            
		phdr->dwUser = 0;
		break;

	case WOM_CLOSE:
		printf("      
");
		break;

	default:
		break;
	}

	return 0;
}

プロジェクトのダウンロード先:https://download.csdn.net/download/zeroling96/11939315