QAudioOutput Play Audio Buffer chat voice ?

[Thà nh Viên Mới]

i dont understand source code Play audio of Qt sample output:


qint64 Generator::readData(char *data, qint64 len)
{
qint64 total = 0;
while (len - total) {
const qint64 chunk = qMin((m_buffer.size() - m_pos), len - total);
memcpy(data, m_buffer.constData() + m_pos, chunk);
m_pos = (m_pos + chunk) % m_buffer.size();
total += chunk;
}
return total;
}

in source code: http://doc.qt.nokia.com/latest/multimedia-audiooutput-audiooutput-cpp.html

can you explain for me ?

[high_flyer]

It would help if you explain what exactly it is you don't understand... one can only guess otherwise.
The code reads (copies) 'len' bytes from the buffer to user given buffer 'data', and moves the current position on the buffer respectively.

[Thà nh Viên Mới]

i want play quicky buffer, but qint64 len allway is: 16384 byte, so it allway slower than 1 second , can you help me change qint64 len = 256 byte ?

[high_flyer]

'len' is an input parameter, the callers sets it.

[Thà nh Viên Mới]

i dont know set it, beacase i is not call qint64 Generator::readData(char *data, qint64 len) , QAudioOutput automatic call it :(

[high_flyer]

but 'Generator' is not a phonon class, its your class.
You are giving too little information to help you, and by revealing one more detail in each post is not helping.