Ocrosoft一直不能开始录音，结束也结束不了，最后发现是把pWaveHdr2写成了pWaveHdr1，_(:з」∠)_
跟之前一样，要先Open设备，PrepareHeader，AddBuffer。结束要UnPrepareHeader，free缓冲区。
主要就是waveform的一些参数设置。
RECORD1.C
#include <Windows.h>
#include "resource.h"
#define INP_BUFFER_SIZE 16384
BOOL CALLBACK DlgProc(HWND, UINT, WPARAM, LPARAM);
TCHAR szAppName[] = TEXT("Record1");
int WINAPI WinMain(HINSTANCE hInstace, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow)
{
// 使用DIALOG作为主窗体
if (-1 == DialogBox(hInstace, TEXT("Record"), NULL, DlgProc))
{
MessageBox(NULL, TEXT("This program requires Windows NT!"), szAppName, MB_ICONERROR);
}
return 0;
}
// 翻转BYTE数组
void ReverseMemory(BYTE *pBuffer, int iLength)
{
BYTE b;
int i;
for (i = 0; i < iLength / 2; i++)
{
b = pBuffer[i];
pBuffer[i] = pBuffer[iLength - i - 1];
pBuffer[iLength - i - 1] = b;
}
}
BOOL CALLBACK DlgProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
static BOOL bRecording, bPlaying, bReverse, bPaused, bEnding, bTerminating;
static DWORD dwDataLength, dwRepetitions = 1;
static HWAVEIN hWaveIn;
static HWAVEOUT hWaveOut;
static PBYTE pBuffer1, pBuffer2, pSaveBuffer, pNewBuffer;
static PWAVEHDR pWaveHdr1, pWaveHdr2;
static TCHAR szOpenError[] = TEXT("Error opening waveform audio!");
static TCHAR szMemError[] = TEXT("Error allocating memory!");
static WAVEFORMATEX waveform;
switch (message)
{
case WM_INITDIALOG:
pWaveHdr1 = malloc(sizeof(WAVEHDR));
pWaveHdr2 = malloc(sizeof(WAVEHDR));
pSaveBuffer = malloc(1);
return TRUE;
case WM_COMMAND:
switch (LOWORD(wParam))
{
// 开始录音
case ID_RECORD_BEG:
// 两个缓冲区分配1.6KB内存
pBuffer1 = malloc(INP_BUFFER_SIZE);
pBuffer2 = malloc(INP_BUFFER_SIZE);
if (!pBuffer1 || !pBuffer2)
{
if (pBuffer1)free(pBuffer1);
if (pBuffer2)free(pBuffer2);
MessageBeep(MB_ICONEXCLAMATION);
MessageBox(hwnd, szMemError, szAppName, MB_ICONEXCLAMATION | MB_OK);
return TRUE;
}
// PCM格式
waveform.wFormatTag = WAVE_FORMAT_PCM;
waveform.nChannels = 1;
// 11025采样率
waveform.nSamplesPerSec = 11025;
waveform.nAvgBytesPerSec = 11025;
waveform.nBlockAlign = 1;
waveform.wBitsPerSample = 8;
waveform.cbSize = 0;
// 把一个MM_WIM_OPEN给放入消息队列
// 成功返回0
if (waveInOpen(&hWaveIn, WAVE_MAPPER, &waveform, (DWORD)hwnd, 0, CALLBACK_WINDOW))
{
free(pBuffer1);
free(pBuffer2);
MessageBeep(MB_ICONEXCLAMATION);
MessageBox(hwnd, szOpenError, szAppName, MB_ICONEXCLAMATION | MB_OK);
}
// 准备缓存
pWaveHdr1->lpData = pBuffer1;
pWaveHdr1->dwBufferLength = INP_BUFFER_SIZE;
pWaveHdr1->dwBytesRecorded = 0;
pWaveHdr1->dwUser = 0;
pWaveHdr1->dwFlags = 0;
pWaveHdr1->dwLoops = 1;
pWaveHdr1->lpNext = NULL;
pWaveHdr1->reserved = 0;
waveInPrepareHeader(hWaveIn, pWaveHdr1, sizeof(WAVEHDR));
pWaveHdr2->lpData = pBuffer2;
pWaveHdr2->dwBufferLength = INP_BUFFER_SIZE;
pWaveHdr2->dwBytesRecorded = 0;
pWaveHdr2->dwUser = 0;
pWaveHdr2->dwFlags = 0;
pWaveHdr2->dwLoops = 1;
pWaveHdr2->lpNext = NULL;
pWaveHdr2->reserved = 0;
waveInPrepareHeader(hWaveIn, pWaveHdr2, sizeof(WAVEHDR));
return TRUE;
// 停止录音
case ID_RECORD_END:
bEnding = TRUE;
// 将一个MM_WIM_DATA消息放入消息队列
waveInReset(hWaveIn);
return TRUE;
case ID_PLAY_BEG:
waveform.wFormatTag = WAVE_FORMAT_PCM;
waveform.nChannels = 1;
waveform.nSamplesPerSec = 11025;
waveform.nAvgBytesPerSec = 11025;
waveform.nBlockAlign = 1;
waveform.wBitsPerSample = 8;
waveform.cbSize = 0;
// 打开音频输出，成功返回0
// 发送一个MM_WOM_OPEN消息
if (waveOutOpen(&hWaveOut, WAVE_MAPPER, &waveform, (DWORD)hwnd, 0, CALLBACK_WINDOW))
{
MessageBeep(MB_ICONEXCLAMATION);
MessageBox(hwnd, szOpenError, szAppName, MB_ICONEXCLAMATION | MB_OK);
}
return TRUE;
// 暂停
case ID_PLAY_PAUSE:
if (!bPaused)
{
waveOutPause(hWaveOut);
SetDlgItemText(hwnd, ID_PLAY_PAUSE, TEXT("Resume"));
bPaused = TRUE;
}
else
{
waveOutRestart(hWaveOut);
SetDlgItemText(hwnd, ID_PLAY_PAUSE, TEXT("Pause"));
bPaused = FALSE;
}
return TRUE;
// 停止播放
case ID_PLAY_END:
bEnding = TRUE;
// 发送MM_WOM_CLOSE消息
waveOutReset(hWaveOut);
return TRUE;
// 倒放
case ID_PLAY_REV:
bReverse = TRUE;
ReverseMemory(pSaveBuffer, dwDataLength);
SendMessage(hwnd, WM_COMMAND, ID_PLAY_BEG, 0);
return TRUE;
// 重复播放
case ID_PLAY_REP:
// 重复标记
dwRepetitions = -1;
SendMessage(hwnd, WM_COMMAND, ID_PLAY_BEG, 0);
return TRUE;
// 两倍采样频率、两倍每秒字节数播放
case ID_PLAY_SPEED:
waveform.wFormatTag = WAVE_FORMAT_PCM;
waveform.nChannels = 1;
waveform.nSamplesPerSec = 22050;
waveform.nAvgBytesPerSec = 22050;
waveform.nBlockAlign = 1;
waveform.wBitsPerSample = 8;
waveform.cbSize = 0;
if (waveOutOpen(&hWaveOut, 0, &waveform, (DWORD)hwnd, 0, CALLBACK_WINDOW))
{
MessageBeep(MB_ICONEXCLAMATION);
MessageBox(hwnd, szOpenError, szAppName, MB_ICONEXCLAMATION | MB_OK);
}
return TRUE;
}
break;
case MM_WIM_OPEN:
// realloc在此处与free+malloc功能类似
pSaveBuffer = realloc(pSaveBuffer, 1);
// 启用禁用按钮
EnableWindow(GetDlgItem(hwnd, ID_RECORD_BEG), FALSE);
EnableWindow(GetDlgItem(hwnd, ID_RECORD_END), TRUE);
EnableWindow(GetDlgItem(hwnd, ID_PLAY_BEG), FALSE);
EnableWindow(GetDlgItem(hwnd, ID_PLAY_PAUSE), FALSE);
EnableWindow(GetDlgItem(hwnd, ID_PLAY_END), FALSE);
EnableWindow(GetDlgItem(hwnd, ID_PLAY_REV), FALSE);
EnableWindow(GetDlgItem(hwnd, ID_PLAY_REP), FALSE);
EnableWindow(GetDlgItem(hwnd, ID_PLAY_SPEED), FALSE);
SetFocus(GetDlgItem(hwnd, ID_RECORD_END));
// 添加缓冲区
waveInAddBuffer(hWaveIn, pWaveHdr1, sizeof(WAVEHDR));
waveInAddBuffer(hWaveIn, pWaveHdr2, sizeof(WAVEHDR));
bRecording = TRUE;
bEnding = FALSE;
dwDataLength = 0;
// 开始录音
waveInStart(hWaveIn);
return TRUE;
// WaveInReset或者缓冲区溢出（超过pBuffer的1.6K后）收到DATA消息
case MM_WIM_DATA:
// 追加新录音的内存大小
pNewBuffer = realloc(pSaveBuffer, dwDataLength + ((PWAVEHDR)lParam)->dwBytesRecorded);
// realloc失败（内存不足）
if (pNewBuffer == NULL)
{
waveInClose(hWaveIn);
MessageBeep(MB_ICONEXCLAMATION);
MessageBox(hwnd, szMemError, szAppName, MB_ICONEXCLAMATION | MB_OK);
return TRUE;
}
// realloc可能导致内存地址变化
// 使用pNewBuffer目的是失败后停止，保存之前成功的录音
pSaveBuffer = pNewBuffer;
// 将新的录音追加到原来的录音后面
CopyMemory(pSaveBuffer + dwDataLength, ((PWAVEHDR)lParam)->lpData, ((PWAVEHDR)lParam)->dwBytesRecorded);
// 计算新的长度
dwDataLength += ((PWAVEHDR)lParam)->dwBytesRecorded;
if (bEnding)
{
waveInClose(hWaveIn);
return TRUE;
}
// 使用完的缓冲区重新添回去
waveInAddBuffer(hWaveIn, (PWAVEHDR)lParam, sizeof(WAVEHDR));
return TRUE;
// waveInClose发送消息
case MM_WIM_CLOSE:
// 卸载缓冲区，释放缓冲区空间
waveInUnprepareHeader(hWaveIn, pWaveHdr1, sizeof(WAVEHDR));
waveInUnprepareHeader(hWaveIn, pWaveHdr2, sizeof(WAVEHDR));
free(pBuffer1);
free(pBuffer2);
EnableWindow(GetDlgItem(hwnd, ID_RECORD_BEG), TRUE);
EnableWindow(GetDlgItem(hwnd, ID_RECORD_END), FALSE);
SetFocus(GetDlgItem(hwnd, ID_RECORD_BEG));
// 检查是否有录音，调整UI
if (dwDataLength > 0)
{
EnableWindow(GetDlgItem(hwnd, ID_PLAY_BEG), TRUE);
EnableWindow(GetDlgItem(hwnd, ID_PLAY_PAUSE), FALSE);
EnableWindow(GetDlgItem(hwnd, ID_PLAY_END), FALSE);
EnableWindow(GetDlgItem(hwnd, ID_PLAY_REV), TRUE);
EnableWindow(GetDlgItem(hwnd, ID_PLAY_REP), TRUE);
EnableWindow(GetDlgItem(hwnd, ID_PLAY_SPEED), TRUE);
SetFocus(GetDlgItem(hwnd, ID_PLAY_BEG));
}
bRecording = FALSE;
if (bTerminating)
SendMessage(hwnd, WM_SYSCOMMAND, SC_CLOSE, 0L);
return TRUE;
case MM_WOM_OPEN:
EnableWindow(GetDlgItem(hwnd, ID_RECORD_BEG), FALSE);
EnableWindow(GetDlgItem(hwnd, ID_RECORD_END), FALSE);
EnableWindow(GetDlgItem(hwnd, ID_PLAY_BEG), FALSE);
EnableWindow(GetDlgItem(hwnd, ID_PLAY_PAUSE), TRUE);
EnableWindow(GetDlgItem(hwnd, ID_PLAY_END), TRUE);
EnableWindow(GetDlgItem(hwnd, ID_PLAY_REV), FALSE);
EnableWindow(GetDlgItem(hwnd, ID_PLAY_REP), FALSE);
EnableWindow(GetDlgItem(hwnd, ID_PLAY_SPEED), FALSE);
SetFocus(GetDlgItem(hwnd, ID_RECORD_END));
// 只有一段音频，不使用双缓冲
pWaveHdr1->lpData = pSaveBuffer;
pWaveHdr1->dwBufferLength = dwDataLength;
pWaveHdr1->dwBytesRecorded = 0;
pWaveHdr1->dwUser = 0;
pWaveHdr1->dwFlags = WHDR_BEGINLOOP | WHDR_ENDLOOP;
// 设置重复标记
pWaveHdr1->dwLoops = dwRepetitions;
pWaveHdr1->lpNext = NULL;
pWaveHdr1->reserved = 0;
waveOutPrepareHeader(hWaveOut, pWaveHdr1, sizeof(WAVEHDR));
waveOutWrite(hWaveOut, pWaveHdr1, sizeof(WAVEHDR));
bEnding = FALSE;
bPlaying = TRUE;
return TRUE;
// waveOutReset()或播放完毕触发
case MM_WOM_DONE:
waveOutUnprepareHeader(hWaveOut, pWaveHdr1, sizeof(WAVEHDR));
waveOutClose(hWaveOut);
return TRUE;
case MM_WOM_CLOSE:
EnableWindow(GetDlgItem(hwnd, ID_RECORD_BEG), TRUE);
EnableWindow(GetDlgItem(hwnd, ID_RECORD_END), TRUE);
EnableWindow(GetDlgItem(hwnd, ID_PLAY_BEG), TRUE);
EnableWindow(GetDlgItem(hwnd, ID_PLAY_PAUSE), FALSE);
EnableWindow(GetDlgItem(hwnd, ID_PLAY_END), FALSE);
EnableWindow(GetDlgItem(hwnd, ID_PLAY_REV), TRUE);
EnableWindow(GetDlgItem(hwnd, ID_PLAY_REP), TRUE);
EnableWindow(GetDlgItem(hwnd, ID_PLAY_SPEED), TRUE);
SetFocus(GetDlgItem(hwnd, ID_PLAY_BEG));
SetDlgItemText(hwnd, ID_PLAY_PAUSE, TEXT("Pause"));
bPaused = FALSE;
dwRepetitions = 1;
bPlaying = FALSE;
if (bReverse)
{
ReverseMemory(pSaveBuffer, dwDataLength);
bReverse = FALSE;
}
// 播放没有影响
//if (bTerminating)
// SendMessage(hwnd, WM_SYSCOMMAND, SC_CLOSE, 0L);
return TRUE;
case WM_SYSCOMMAND:
switch (LOWORD(wParam))
{
// 关闭窗口
case SC_CLOSE:
// 正在录音
if (bRecording)
{
// 关闭窗口标记
bTerminating = TRUE;
bEnding = TRUE;
// 尝试停止录音
waveOutReset(hWaveOut);
return TRUE;
}
free(pWaveHdr1);
free(pWaveHdr2);
free(pSaveBuffer);
EndDialog(hwnd, 0);
return TRUE;
}
break;
}
return FALSE;
}
resource.h
#define ID_RECORD_BEG 1000 #define ID_RECORD_END 1001 #define ID_PLAY_BEG 1002 #define ID_PLAY_PAUSE 1003 #define ID_PLAY_END 1004 #define ID_PLAY_REV 1005 #define ID_PLAY_REP 1006 #define ID_PLAY_SPEED 1007
RECORD1.RC
/////////////////////////////////////////////////////////////////////////////
//
// Dialog
//
RECORD DIALOGEX 100, 100, 152, 74
STYLE DS_SETFONT | DS_FIXEDSYS | WS_MINIMIZEBOX | WS_VISIBLE | WS_CAPTION | WS_SYSMENU
CAPTION "Waveform Audio Recorder"
FONT 8, "MS Shell Dlg", 400, 0, 0x1
BEGIN
PUSHBUTTON "Record",ID_RECORD_BEG,28,8,40,14
PUSHBUTTON "End",ID_RECORD_END,76,8,40,14,WS_DISABLED
PUSHBUTTON "Play",ID_PLAY_BEG,8,30,40,14,WS_DISABLED
PUSHBUTTON "Pause",ID_PLAY_PAUSE,56,30,40,14,WS_DISABLED
PUSHBUTTON "End",ID_PLAY_END,104,30,40,14,WS_DISABLED
PUSHBUTTON "Reverse",ID_PLAY_REV,8,52,40,14,WS_DISABLED
PUSHBUTTON "Repeat",ID_PLAY_REP,56,52,40,14,WS_DISABLED
PUSHBUTTON "Speedup",ID_PLAY_SPEED,104,52,40,14,WS_DISABLED
END
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