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錄音配置多個buffer問題

答題得分者是:qmlab
ericnien
一般會員


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註冊:2007-11-11

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#1 引用回覆 回覆 發表時間:2007-11-11 00:33:51 IP:218.161.xxx.xxx 訂閱
我使用的環境是VC++6.0
#include
#include
#include
#include
#pragma comment(lib, "winmm.lib")
#define LENGTH 40000
void CALLBACK waveInProc(HWAVEIN wave_in, UINT uMsg,
DWORD dwInstance, DWORD dwParam1, DWORD dwParam2);
static HWAVEIN wave_in;
static WAVEFORMATEX wave;
static WAVEHDR temp[8];
char buffer[8][LENGTH]={""};
int a=0;
int main(int argc, char* argv[])
{
int i;
wave.wFormatTag=WAVE_FORMAT_PCM;
wave.nChannels=1;
wave.nSamplesPerSec=8000;
wave.nAvgBytesPerSec=8000;
wave.nBlockAlign=1;
wave.wBitsPerSample=8;
wave.cbSize=0;

waveInOpen(&wave_in,WAVE_MAPPER,&wave, (DWORD)waveInProc,0,CALLBACK_FUNCTION);
for(i=0;i<8;i ){
temp[i].lpData=buffer[i];
temp[i].dwBufferLength=LENGTH;
temp[i].dwFlags=0;
waveInPrepareHeader(wave_in,&temp[i],sizeof(WAVEHDR));
waveInAddBuffer(wave_in,&temp[i],sizeof(WAVEHDR));
}
waveInStart(wave_in);
waveInStop(wave_in);
waveInClose(wave_in);
return 0;
}

void CALLBACK waveInProc(HWAVEIN wave_in,
UINT uMsg, DWORD dwInstance, DWORD dwParam1, DWORD dwParam2)
{
switch(uMsg)
{
case WIM_DATA:
a=(a 8)%8;
waveInAddBuffer(wave_in,&temp[a],sizeof(WAVEHDR));
a ;
break;
}
}

我想問的是,在main函式內我將8個buffer都配置進去了,但不知道接下來是怎樣運算,網路上文章都說,當waveInStart中buffer存滿,就會回傳WIM_DATA到waveInProc,接著在裡面配置新的buffer進去,我的想法是:一開始配置buffer是否一個接一個,當第一個buffer存滿,這時第二個buffer即會接著去儲存,而我們要做的則是將資料作處理後,再配置新的buffer使之不會中斷,但執行結果似乎只存滿了一個buffer就結束了,不知是否有人知道問題何在。
qmlab
一般會員


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回覆:6
積分:11
註冊:2008-02-15

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#2 引用回覆 回覆 發表時間:2008-02-15 15:13:29 IP:60.250.xxx.xxx 訂閱
//使用Double Buffer交替錄音即可,多了會當O!Struct 填入如下即可正常運作.

void TSPEECH::Record(int OFF_ON_RESET)
{
if(OFF_ON_RESET==ON) //ON
{
WaveHdr1.lpData = (LPSTR)SpeechBuffer1;
WaveHdr1.dwBufferLength = Def_SPEECHBUFFER_LENGTH_X;
WaveHdr1.dwBytesRecorded = 0L;
WaveHdr1.dwUser = 0L;
WaveHdr1.dwFlags = 0L;
WaveHdr1.dwLoops = 0L;
WaveHdr1.lpNext = NULL;
WaveHdr1.reserved = 0L;
waveInPrepareHeader(HWaveIn,&WaveHdr1,sizeof(WAVEHDR));
waveInAddBuffer(HWaveIn,&WaveHdr1,sizeof(WAVEHDR));
WaveHdr2.lpData = (LPSTR)SpeechBuffer2;
WaveHdr2.dwBufferLength = Def_SPEECHBUFFER_LENGTH_X;
WaveHdr2.dwBytesRecorded = 0L;
WaveHdr2.dwUser = 0L;
WaveHdr2.dwFlags = 0L;
WaveHdr2.dwLoops = 0L;
WaveHdr2.lpNext = NULL;
WaveHdr2.reserved = 0L;
waveInPrepareHeader(HWaveIn,&WaveHdr2,sizeof(WAVEHDR));
waveInAddBuffer(HWaveIn,&WaveHdr2,sizeof(WAVEHDR));
waveInStart(HWaveIn);
}
else
if(OFF_ON_RESET==OFF) //OFF
{
//waveInStop(HWaveIn);
waveInReset(HWaveIn);
waveInClose(HWaveIn);
}
else
if(OFF_ON_RESET==RESET) //RESET
{
PWaveHdr->dwBufferLength = Def_SPEECHBUFFER_LENGTH_X;
PWaveHdr->dwBytesRecorded = 0L;
PWaveHdr->dwUser = 0L;
PWaveHdr->dwFlags = 0L;
//PWaveHdr->dwLoops = 0L; //test
//PWaveHdr->lpNext = NULL; //test
PWaveHdr->reserved = 0L; //win98 不可用
waveInPrepareHeader(HWaveIn,PWaveHdr,sizeof(WAVEHDR)); //win98 不可用
waveInAddBuffer(HWaveIn,PWaveHdr,sizeof(WAVEHDR));
}
}
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