record sound

获取pcm文件

SoundRecord* g_sound=nullptr;
#pragma comment(lib, "winmm.lib")
DWORD CALLBACK MicCallback(HWAVEIN hwavein, UINT uMsg, DWORD dwInstance, DWORD dwParam1, DWORD dwParam2){switch (uMsg) {case WIM_OPEN:LOGXD("The device is on ...");break;case WIM_DATA: {if (g_sound)g_sound->getDealFun()(hwavein, uMsg, dwInstance, dwParam1, dwParam2, g_sound->getRunState());waveInAddBuffer(hwavein, (LPWAVEHDR)dwParam1, sizeof(WAVEHDR));break;}case WIM_CLOSE:LOGXD("The equipment has been shut down. ...");break;default:break;}return 0;}void SoundRecord::getPcm(int _rate, int _channel, int _bit_size, std::function<void(HWAVEIN, UINT, DWORD, DWORD, DWORD, bool& is_run)> _fun) {do {//1.get infoint count = waveInGetNumDevs();//1LOGXD("n Audio input quantity: ", VAR_DATA(count));if (count <= 0)break;WAVEINCAPS waveIncaps;MMRESULT mmResult = waveInGetDevCaps(0, &waveIncaps, sizeof(WAVEINCAPS));//2LOGXD("Audio input equipment:", VAR_DATA(waveIncaps.szPname));if (mmResult != MMSYSERR_NOERROR)break;//2.init wave_formatWAVEFORMATEX pwfx;pwfx.wFormatTag = WAVE_FORMAT_PCM;pwfx.nChannels = _channel;pwfx.nSamplesPerSec = _rate;pwfx.wBitsPerSample = _bit_size;pwfx.nBlockAlign = pwfx.nChannels * pwfx.wBitsPerSample / 8;pwfx.nAvgBytesPerSec = pwfx.nSamplesPerSec * pwfx.nBlockAlign;pwfx.cbSize = 0;//3.open device and ready bufHWAVEIN phwi;LOGXD("Request to open audio input device ");LOGXD(VAR_DATA(pwfx.nChannels), VAR_DATA(pwfx.nBlockAlign), VAR_DATA(pwfx.nSamplesPerSec));mmResult = waveInOpen(&phwi, WAVE_MAPPER, &pwfx, (DWORD)(MicCallback), NULL, CALLBACK_FUNCTION);//3if (MMSYSERR_NOERROR != mmResult)break;int buf_size = pwfx.nAvgBytesPerSec * 2;WAVEHDR pwh1;unique_ptr<char[]> buffer1 = make_unique<char[]>(buf_size);pwh1.lpData = buffer1.get();pwh1.dwBufferLength = buf_size;pwh1.dwUser = 1;pwh1.dwFlags = 0;mmResult = waveInPrepareHeader(phwi, &pwh1, sizeof(WAVEHDR));LOGXD("Standby buffer 1");WAVEHDR pwh2;unique_ptr<char[]> buffer2 = make_unique<char[]>(buf_size);pwh2.lpData = buffer2.get();pwh2.dwBufferLength = buf_size;pwh2.dwUser = 2;pwh2.dwFlags = 0;mmResult = waveInPrepareHeader(phwi, &pwh2, sizeof(WAVEHDR));LOGXD("Standby buffer 2");//4.start getif (MMSYSERR_NOERROR != mmResult)break;mmResult = waveInAddBuffer(phwi, &pwh1, sizeof(WAVEHDR));LOGXD("The buffer 1 Add audio input device ");mmResult = waveInAddBuffer(phwi, &pwh2, sizeof(WAVEHDR));LOGXD("The buffer 2 Add audio input device ");if (MMSYSERR_NOERROR != mmResult)break;mmResult = waveInStart(phwi);//6LOGXA("Request to start recording");getDealFun() = _fun;g_sound = this;while (getRunState()) { Sleep(1000); }waveInReset(phwi); waveInClose(phwi);} while (false);LOGXF("record was exit");
}

void Start::doSomething(){int all_number = 20;int now_number =0;fstream out_file;auto del_fun = [&now_number, all_number, &out_file](HWAVEIN hwavein, UINT uMsg, DWORD dwInstance, DWORD dwParam1, DWORD dwParam2,bool &is_run) {LPWAVEHDR waveheader = ((LPWAVEHDR)dwParam1);LOGXD("The buffer %d To fill ...", waveheader->dwUser);LOGXD("The buffer %d To fill ...", waveheader->dwBytesRecorded);if (now_number>=all_number) {out_file.close();out_file.open("C:/desktop/1/" + to_string(time(nullptr)) + ".pcm", ios::out | ios::binary);now_number = 0;}now_number++;out_file.write(waveheader->lpData, waveheader->dwBytesRecorded);};SoundRecord s;s.getPcm(8000,1,16, del_fun);
}

pcm to mp3

ffmpeg -y -f s16be -ac 1 -ar 8000 -acodec pcm_s16le -i 1.pcm new.mp3

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record sound

获取pcm文件

pcm to mp3

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