void parentSigalarm(int signo)
{
if(readCounter()>=maxCount)
kill_exit();
if(readCounter() % 2)
kill(daughterPID,SIGALRM);
else
kill(sonPID,SIGALRM);
}
qint64 QAudioInterfaceBuffer::bytesAvailable()
{
m_mutex.lock();
int count = writeCounter() - readCounter();
m_mutex.unlock();
if (count >= 0)
return count;
return 0;
}
qint64 QAudioInterfaceBuffer::writeData(const char *data, qint64 len)
{
if (m_size <= 0 || len <= 0) {
return 0;
}
m_mutex.lock();
int count = len;
const char *pdata = data;
int increment = 0;
#if QT_DEBUG_SOUNDBACKEND
qDebug() << QThread::currentThreadId() << (quint64)m_elapsed.elapsed() <<
"wr:" << len << "+" << (writeCounter() - readCounter());
#endif
while (count > 0) {
bool wrap = (m_writePos + count) >= m_size;
if (wrap) {
int block = m_size - m_writePos;
memcpy(m_buffer + m_writePos, pdata, block);
increment = block;
count -= block;
pdata += block;
m_writeWrap++;
m_writePos = 0;
} else {
memcpy(m_buffer + m_writePos, pdata, count);
increment = count;
count -= count;
pdata += count;
m_writePos = (m_writePos + increment) % m_size;
}
}
m_mutex.unlock();
return len;
}
int incrementFile()
{
return writeCounter(addOneTotInt(readCounter()));
}
