程序时实播放没有问题,回放出现马赛克现象,为什么?
匪六哥 2003-05-12 03:28:31 程序时实播放没有问题,回放出现马赛克现象,为什么?
void McSocket::OnRecieve (int errcode)
{
int lenrec;
if (errcode != -1)
{
m_csRecv[m_win].Lock();
lenrec = Recv(bufVideo[m_win], Q_SIZE, 0);
if ((lenrec > 6+5) && (m_win < WINDOWSNUM))
{
unsigned char cc = (unsigned char)(bufVideo[m_win][8]);
if ( (bufVideo[m_win][6] == 0) && (bufVideo[m_win][7] ==0) && ((cc & 0x80) == 0x80) //判断标志位是否到来
{
vv[m_win].len = oldl[m_win];//待保存数据长度
if (oldl[m_win]>0)
{
vv[m_win].m_picHwnd = m_picHwnd;
SaveFile(vv[m_win].data, oldl[m_win]);//保存文件
III(m_win, &vv[m_win]);//实时播放
oldl[m_win] = 0;//清零
}
}
for (int i=0; i<lenrec-6; i++)
{
vv[m_win].data[oldl[m_win]+i] = bufVideo[m_win][i+6];//将缓存数据保存
}
oldl[m_win] += lenrec-6;//标志位未到,一直累加。
}
}
m_csRecv[m_win].Unlock();
}
}
void McSocket::SaveFile(unsigned char* wBuf, int size)
{ CFile m_Save_file;
if(m_Save_file.Open(tempN, CFile::modeWrite| CFile::shareDenyRead, NULL ) {
unsigned char sc[2];
sc[0] = size /256;
sc[1] = size % 256;
m_Save_file.SeekToEnd( );
m_Save_file.Write(sc, 2);//保存长度
m_Save_file.Write(wBuf, size);
m_Save_file.Close();
}
}
unsigned long StartPlayBack(CString fileN, HWND hwnd, unsigned long current_size)
{
FILE *f;
unsigned char s[2];
f = fopen(fileN, "rb" );
if (f==NULL)
{
return 0;
}
fseek(f, current_size, SEEK_SET);
if (fread(s, sizeof( char ), 2, f) > 1)
{
//into video queue
unsigned short size = s[0]*256 +s[1];
if (size>0)
{
m_csRecv[WINDOWSNUM].Lock();
fread(vv[WINDOWSNUM].data, sizeof( char ), size, f);//读出数据
vv[WINDOWSNUM].len = size;
vv[WINDOWSNUM].m_picHwnd = hwnd;
EnterQ(q[WINDOWSNUM], vv[WINDOWSNUM]);//播放
m_csRecv[WINDOWSNUM].Unlock();
}
fclose(f);
return current_size+size+2;
}
else
{
HWND hwndParent = GetParent(hwnd);
if(hwndParent != NULL) ::PostMessage(hwndParent,WM_STOP_PLAYBACK,0,0);
fclose(f);
return 0;
}
}