QAudioOutput

[satyanarayana143]

i am using Qt 5.13 QAudioOutput and QIODevice write is crashing in Qt 5.11 it is working fine in Q5.13 it is crashing .what is issue can anybody tell

QAudioOutput *speaker;
QIODevice *device;

QAudioFormat format;
format.setChannelCount(1);
format.setSampleRate(SAMPLE_RATE);
format.setSampleSize(SAMPLE_SIZE);
format.setCodec("audio/pcm");
format.setByteOrder(QAudioFormat::LittleEndian);
format.setSampleType(QAudioFormat::SignedInt);

eQueryAudioState = AudioPlayingNotStarted;
bDecoderInit = false;
speaker = new QAudioOutput(QAudioDeviceInfo::defaultOutputDevice(),format);
speaker->setBufferSize(32000);//(32000);//(32768);
//  speaker->setNotifyInterval(20);
device = speaker->start();
audioTimer = new QTimer();
audioTimer->setTimerType(Qt::TimerType::PreciseTimer);
audioTimer->setSingleShot(false);
audioTimer->setInterval(5);//5


connect(audioTimer,SIGNAL(timeout()),this,SLOT(playAudio()));
audioTimer->start();
opusDecoderInit(format);

int nSamplesDecoded = opus_decode(opusDecoder,(unsigned char *)buffer.data(), ENCODED_BUFFER_SIZE, dec_out, AUDIO_BUFFER_SIZE, 0);
if (nSamplesDecoded < 0)
{
qDebug() << "decoder failed: " << opus_strerror(nSamplesDecoded);
return;
}
else
{
qDebug() << "Samples Decoded " << nSamplesDecoded ;
}

if(device->isOpen() && device->isWritable())
{
    int BytesWritten = device->write((char *)dec_out,nSamplesDecoded*2);
}

[jsulm]

@satyanarayana143 said in QAudioOutput:

i am using Qt 5.13 QAudioOutput and QIODevice write is crashing in Qt 5.11 it is working fine in Q5.13 it is crashing

Please fix this sentence - in which version does it crash?
Did you use debugger to see where it crashes?
Do you have a stack trace after crash?

[satyanarayana143]

Qt 5.13 version

device is QIODevice

static short dec_out[AUDIO_BUFFER_SIZE]={0};

int BytesWritten = device->write((char *)dec_out,nSamplesDecoded*2);

[jsulm]

@satyanarayana143 said in QAudioOutput:

device is QIODevice
static short dec_out[AUDIO_BUFFER_SIZE]={0};
int BytesWritten = device->write((char )dec_out,nSamplesDecoded2);

This does not answer my other questions. If your app is crashing then please use debugger...

[satyanarayana143]

@jsulm said in QAudioOutput:

This does not answer my other questions. If your app is crashing then please use debugger...

using debugger at this line it is crashing

[jsulm]

@satyanarayana143 What kind of crash is it? SIGSEGV? Is device a valid pointer in that line?

[satyanarayana143]

QT installed system it is running in non qt installed system it is crashing i copied multimedia dlls .

any dll is missing for that crash

[jsulm]

@satyanarayana143 You need to deploy your app properly with all needed libs and plug-ins: https://doc.qt.io/qt-5/deployment.html