(Solved)Push and Pull ?QAudioOutput

[vpwal]

I did not understand what is pull and push ..
May be some examples could let me understand.

[SGaist]

Not in pull mode. In pull mode, it's the device that gets the data at the rate it needs.

[vpwal]

if i have .wav data in chunks say 512 and more (till the file is finished).i want to play this chunk then which mode would be better for this.

[SGaist]

It's not really clear, do you want to play the complete file or just a chunk of it ?

[vpwal]

Hi..
Actually i am converting my mp3 file to wav file using 3rd API for conversion.
That conversion gives me a chunk (in wav) so that i can play it simultaneously in Qt(using QAudioOutput).
Read File mp3----->Convert it into wav--->play it (QAudioOutput)
again read next chunks mp3 ---->convert it ---->play it
until the file finished.

For More Clear what my intention is. i am providing you a link.
in play URL section, i want to use Qt Player instead of libao(3rd Party)
"please find here":http://hzqtc.github.io/2012/05/play-mp3-with-libmpg123-and-libao.html

[SGaist]

Then use the push mode

[vpwal]

Hi..

if i use push mode then how i have to wait till the data is not played.then i have to read and write the next chunks.

[vpwal]

Hi.
@void CAudio::PlayAudio()
{

m_format.setSampleRate(22050); //44100 //48000 //22050 //11025
m_format.setChannelCount(2); // one for mono or two for stereo
m_format.setSampleSize(16); //8 or 16
m_format.setCodec("audio/pcm");
m_format.setByteOrder(QAudioFormat::LittleEndian); //Byte ordering of sample (typically little endian, big endian)
m_format.setSampleType(QAudioFormat::SignedInt); //Numerical representation of sample (typically signed integer, unsigned integer or float)

 QAudioDeviceInfo info(QAudioDeviceInfo::defaultOutputDevice());
 if (!info.isFormatSupported(m_format)) 

{
qWarning() << "Default format not supported - trying to use nearest";
m_format = info.nearestFormat(m_format);
}
QAudioDeviceInfo m_device(QAudioDeviceInfo::defaultOutputDevice());
//pvcRW_Obj = new CReadWrite;

m_audioOutput = new QAudioOutput(m_device, m_format, this);
connect(m_audioOutput, SIGNAL(notify()), SLOT(notified()));
connect(m_audioOutput, SIGNAL(stateChanged(QAudio::State)), SLOT(stateChanged(QAudio::State)));

mfile.setFileName("d:/out_Converted1.wav");
mfile.open(QIODevice::ReadOnly);
pIO_Device = m_audioOutput->start();
pIO_Device->open(QIODevice::ReadWrite);

qint64 size = mfile.size();
qint64 tot =0;
while(tot < size)
{
QByteArray ba = mfile.read(512);
qint64 bytesWritten = pIO_Device->write(ba,ba.size());
tot+=bytesWritten;

}

}@
The above is my code it always produces sound with lot of distortion.

[SGaist]

Since you have a wav file, why don't use pull mode ?