📄 audioapp.cpp
字号:
return -1;
}
// See how many waveOut devices are registered in the system.
n=waveInGetNumDevs();
if(0 == n)
{
RETAILMSG(1, (TEXT( "ERROR: waveInGetNumDevs reported zero devices, we need at least one.")));
MessageBox(hwnd, TEXT("ERROR: waveInGetNumDevs reported zero devices, we need at least one."), TEXT("NotesApp"), MB_OK | MB_ICONSTOP);
return -1;
}
// Create our WaveIn headers for the bucket brigade
ZeroMemory(&whr1,sizeof(whr1));
ZeroMemory(&whr2,sizeof(whr2));
// set up pwfxRec to the format we want to record in: 11kHz, 8bit, Mono
ZeroMemory(&wfxRec, sizeof(wfxRec));
wfxRec.wFormatTag = WAVE_FORMAT_PCM; // PCM FORMAT
wfxRec.nChannels = 1; // MONO Sound
wfxRec.nSamplesPerSec = 11025; // 11 kHz
wfxRec.wBitsPerSample = 8; // 8 bits per sample
wfxRec.nBlockAlign = wfxRec.nChannels*wfxRec.wBitsPerSample/8;
wfxRec.nAvgBytesPerSec = wfxRec.nSamplesPerSec*wfxRec.nBlockAlign;
wfxRec.cbSize = 0;
pwfxRec = &wfxRec;
// Create/Initialize the new file
hResult=RecordFile.Create(pszWAVFilename,GENERIC_WRITE,
CREATE_ALWAYS,0,(LPVOID*)&pwfxRec,NULL);
if(ERROR_SUCCESS != hResult) {
RETAILMSG(1, (TEXT("ERROR: Could not Open %s"),pszWAVFilename));
return -1;
}
// prepare the input buffers which will hold 20msec worth of audio data at a time
nBufSize = ((DWORD)(5*wfxRec.nSamplesPerSec)) * wfxRec.nBlockAlign; // ~20 ms buffer
if(nBufSize < wfxRec.nBlockAlign)
nBufSize = wfxRec.nBlockAlign; // make sure we don't go too small, or else we'll get exceptions
data1 = new char[nBufSize];
data2 = new char[nBufSize];
if(!data1 || !data2)
{
RETAILMSG(1, (TEXT("ERROR: OOM. Could not allocate capture buffers.")));
return -1;
}
ZeroMemory(data1,nBufSize);
ZeroMemory(data2,nBufSize);
// Open the Wave Intput Stream
mmRtn = waveInOpen(&hwi,dwDeviceID,&wfxRec, (DWORD)hwnd,0,CALLBACK_WINDOW);
if(MMSYSERR_NOERROR != mmRtn) {
RETAILMSG(1, (TEXT("ERROR: waveInOpen failed with return code %d"), mmRtn));
return mmRtn;
}
// Prepare first header
whr1.lpData = data1;
whr1.dwBufferLength = nBufSize;
whr1.dwLoops = 0; // Do not set looping flags and dwLoops anymore
whr1.dwFlags = 0; // Just Set them to 0
mmRtn = waveInPrepareHeader(hwi,&whr1,sizeof(whr1));
if(MMSYSERR_NOERROR != mmRtn) {
RETAILMSG(1, (TEXT("ERROR: waveInPrepareHeader failed with return code %d"), mmRtn));
return mmRtn;
}
// Prepare second header
whr2.lpData = data2;
whr2.dwBufferLength = nBufSize;
whr2.dwLoops = 0; // Do not set looping flags and dwLoops anymore
whr2.dwFlags = 0; // Just Set them to 0
mmRtn = waveInPrepareHeader(hwi,&whr2,sizeof(whr2));
if(MMSYSERR_NOERROR != mmRtn) {
RETAILMSG(1, (TEXT("ERROR: waveInPrepareHeader failed with return code %d"), mmRtn));
return mmRtn;
}
// Pass both buffers to the driver to be queued up
mmRtn = waveInAddBuffer(hwi, &whr1, sizeof(WAVEHDR));
if(mmRtn != MMSYSERR_NOERROR)
{
RETAILMSG(1, (TEXT("ERROR: waveInAddBuffer failed with return code %d"), mmRtn));
return mmRtn;
}
dwNumCaptureBuffers = 1;
mmRtn = waveInAddBuffer(hwi, &whr2, sizeof(WAVEHDR));
if(mmRtn != MMSYSERR_NOERROR)
{
RETAILMSG(1, (TEXT("ERROR: waveInAddBuffer failed with return code %d"), mmRtn));
return mmRtn;
}
dwNumCaptureBuffers++;
RETAILMSG(1, (TEXT("Capture Buffers Queued up")));
// start the recording
mmRtn = waveInStart(hwi);
if(mmRtn != MMSYSERR_NOERROR)
{
RETAILMSG(1, (TEXT("ERROR: waveInStart failed with return code %d"), mmRtn));
return mmRtn;
}
bIsRecordingPaused = false;
RETAILMSG(1, (TEXT("Capture Started")));
return 0;
break;
case WM_PLAY_WAVEFILE:
// Play the given wavefile
pszWAVFilename = (LPTSTR)lParam;
if(NULL == pszWAVFilename)
{
// no/invalid file name given
MessageBox(hwnd, TEXT("WAVE File Name was NULL"), TEXT("NotesApp"), MB_OK | MB_ICONSTOP);
return -1;
}
// See how many waveOut devices are registered in the system.
n=waveOutGetNumDevs();
if(0 == n)
{
RETAILMSG(1, (TEXT( "ERROR: waveOutGetNumDevs reported zero devices, we need at least one.")));
MessageBox(hwnd, TEXT("ERROR: waveOutGetNumDevs reported zero devices, we need at least one."), TEXT("NotesApp"), MB_OK | MB_ICONSTOP);
return -1;
}
hResult=WaveFile.Create(pszWAVFilename,GENERIC_READ,
OPEN_EXISTING,0,(LPVOID*)&pwfx,NULL);
if(ERROR_SUCCESS != hResult) {
RETAILMSG(1, (TEXT("ERROR: Could not Open %s"),pszWAVFilename));
return -1;
}
// Create our WaveOut headers for the bucket brigade
ZeroMemory(&wh1,sizeof(wh1));
ZeroMemory(&wh2,sizeof(wh2));
dwNumPlaybackBuffers = 0; // in case something bad happened in a previous playback loop make sure we start at a good value.
// allocate 2 fixed sized buffers for the bucket brigade
// buffer size needs to be a multiple of the block alignment (tight loop in driver makes some assumptions)
wh1.dwBufferLength = ((DWORD)(( pwfx->nSamplesPerSec)+1)) * pwfx->nBlockAlign; // ~20 ms buffer
if(wh1.dwBufferLength < pwfx->nBlockAlign)
wh1.dwBufferLength = pwfx->nBlockAlign; // make sure we don't go too small, or else we'll get exceptions
wh2.dwBufferLength = wh1.dwBufferLength;
RETAILMSG(1, (TEXT("NOTE: dwBufferLength is %d"), wh1.dwBufferLength));
// Allocate Space for the playback Buffers
playData1 = new char[wh1.dwBufferLength];
playData2 = new char[wh2.dwBufferLength];
if(!playData1 || !playData2)
{
RETAILMSG(1, (TEXT("ERROR: OOM. Could not allocate playback buffers.")));
return -1;
}
ZeroMemory(playData1,wh1.dwBufferLength);
ZeroMemory(playData2,wh2.dwBufferLength);
wh1.lpData = playData1;
wh2.lpData = playData2;
// Fill the buffers
WaveFile.ReadData(wh1.lpData,wh1.dwBufferLength,&nBytes);
if(nBytes != wh1.dwBufferLength) {
RETAILMSG(1, (TEXT("ERROR: Could not read a buffer's worth of data from the file.")));
return -1;
}
WaveFile.ReadData(wh2.lpData,wh2.dwBufferLength,&nBytes);
if(nBytes != wh2.dwBufferLength) {
RETAILMSG(1, (TEXT("ERROR: Could not read a buffer's worth of data from the file.")));
return -1;
}
// Open the Wave Output Stream
mmRtn = waveOutOpen(&hwo,dwDeviceID,pwfx, (DWORD)hwnd,0,CALLBACK_WINDOW);
if(MMSYSERR_NOERROR != mmRtn) {
RETAILMSG(1, (TEXT("ERROR: waveOutOpen failed with return code %d"), mmRtn));
return mmRtn;
}
// Prepare first header
mmRtn = waveOutPrepareHeader(hwo,&wh1,sizeof(wh1));
if(MMSYSERR_NOERROR != mmRtn) {
RETAILMSG(1, (TEXT("ERROR: waveOutPrepareHeader failed with return code %d"), mmRtn));
return mmRtn;
}
// Prepare second header
mmRtn = waveOutPrepareHeader(hwo,&wh2,sizeof(wh2));
if(MMSYSERR_NOERROR != mmRtn) {
RETAILMSG(1, (TEXT("ERROR: waveOutPrepareHeader failed with return code %d"), mmRtn));
return mmRtn;
}
// Pass the headers to the waveAPI so that they can be queued up to play
// Write out the header to the waveform audio output stream
mmRtn=waveOutWrite(hwo,&wh1,sizeof(wh1));
if(MMSYSERR_NOERROR != mmRtn) {
RETAILMSG(1, (TEXT("ERROR: waveOutWrite failed with return code %d"), mmRtn));
return mmRtn;
}
dwNumPlaybackBuffers++; // increment number of Playback Buffers we are tracking
mmRtn=waveOutWrite(hwo,&wh2,sizeof(wh2));
if(MMSYSERR_NOERROR != mmRtn) {
RETAILMSG(1, (TEXT("ERROR: waveOutWrite failed with return code %d"), mmRtn));
return mmRtn;
}
dwNumPlaybackBuffers++; // increment number of Playback Buffers we are tracking
return 0;
break;
case WM_RECORD_STOP:
// Stop recording the current WAVFILE
// Stop the capture stream
if(hwi)
{
mmRtn = waveInStop(hwi);
if(mmRtn != MMSYSERR_NOERROR)
{
RETAILMSG(1, (TEXT("ERROR: waveInStop failed with return code %d"), mmRtn));
return mmRtn;
}
mmRtn = waveInReset(hwi);
if(mmRtn != MMSYSERR_NOERROR)
{
RETAILMSG(1, (TEXT("ERROR: waveInReset failed with return code %d"), mmRtn));
return mmRtn;
}
// at this point we need to wait for all capture buffers to be returned from the driver
// waveInReset should speed this along.
// once all the buffers are returned and all data is written out to file, the WM_RECORD_FINISHED
// message will be sent and we'll take care of writing out that data and closing the file and streams
bStopRecording = true; // this tells the MM_WIM_DATA handler to not pass any finished buffers back to the driver
}
else
RETAILMSG(1, (TEXT("hwi was NULL in STOP")));
return 0;
break;
case WM_RECORD_FINISHED:
// If we are processing this message, then we assume that all capture buffers have been returned
// from the driver and written to the file. We will now close out the file
if(hwi)
{
mmRtn = waveInClose(hwi);
if(mmRtn != MMSYSERR_NOERROR)
{
RETAILMSG(1, (TEXT("ERROR: waveInClose failed with return code %d"), mmRtn));
return mmRtn;
}
hwi = NULL;
}
else
RETAILMSG(1, (TEXT("hwi was NULL")));
// Close the file
RecordFile.Close();
RETAILMSG(1, (TEXT("Captured file should be closed now.")));
// reset for next use
bStopRecording = false;
// Enable the Record Button
EnableWindow(hwndRecordButton, true);
return 0;
break;
case WM_PLAYBACK_FINISHED:
// If we are processing this message, then we assume that all playback buffers have been returned
// from the driver. We will now close out the file(s)
if(hwo)
{
mmRtn = waveOutClose(hwo);
if(mmRtn != MMSYSERR_NOERROR)
{
RETAILMSG(1, (TEXT("ERROR: waveOutClose failed with return code %d"), mmRtn));
return mmRtn;
}
hwo = NULL;
}
else
RETAILMSG(1, (TEXT("hwo was NULL")));
// Close the file
WaveFile.Close();
RETAILMSG(1, (TEXT("Playback file should be closed now.")));
// reset this for next use
bStopPlaying = false;
// Enable the Play button
EnableWindow(hwndPlayButton, true);
return 0;
break;
case WM_PLAY_STOP:
// stop playing the current WAVEFILE
// stop the playback stream
if(hwo)
{
mmRtn = waveOutReset(hwo);
if(mmRtn != MMSYSERR_NOERROR)
{
RETAILMSG(1, (TEXT("ERROR: waveOutReset failed with return code %d"), mmRtn));
return mmRtn;
}
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -