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#include <QtTest/QtTest>

#include <QtCore/qlocale.h>

#include <qaudiooutput.h>

#include <qaudiodeviceinfo.h>

#include <qaudio.h>

#include <qaudioformat.h>

class tst_QAudioOutput : public QObject

{

    Q_OBJECT

public:

    tst_QAudioOutput(QObject* parent=0) : QObject(parent) {}

private slots:

    void initTestCase();

    void settings();

    void buffers();

    void notifyInterval();

    void pullFile();

    void pushFile();

private:

    bool          available;

    QAudioFormat  format;

    QAudioOutput* audio;

};

void tst_QAudioOutput::initTestCase()

{

    format.setFrequency(8000);

    format.setChannels(1);

    format.setSampleSize(8);

    format.setCodec("audio/pcm");

    format.setByteOrder(QAudioFormat::LittleEndian);

    format.setSampleType(QAudioFormat::UnSignedInt);

    // Only perform tests if audio output device exists!

    QList<QAudioDeviceInfo> devices = QAudioDeviceInfo::availableDevices(QAudio::AudioOutput);

    if(devices.size() > 0)

        available = true;

    else {

        qWarning()<<"NOTE: no audio output device found, no test will be performed";

        available = false;

    }

    audio = new QAudioOutput(format, this);

}

void tst_QAudioOutput::settings()

{

    if(available) {

        // Confirm the setting we added in the init function.

        QAudioFormat f = audio->format();

        QVERIFY(format.channels() == f.channels());

        QVERIFY(format.frequency() == f.frequency());

        QVERIFY(format.sampleSize() == f.sampleSize());

        QVERIFY(format.codec() == f.codec());

        QVERIFY(format.byteOrder() == f.byteOrder());

        QVERIFY(format.sampleType() == f.sampleType());

    }

}

void tst_QAudioOutput::buffers()

{

    if(available) {

        // Should always have a buffer size greater than zero.

        int store = audio->bufferSize();

        audio->setBufferSize(4096);

        QVERIFY(audio->bufferSize() > 0);

        audio->setBufferSize(store);

        QVERIFY(audio->bufferSize() == store);

    }

}

void tst_QAudioOutput::notifyInterval()

{

    if(available) {

        QVERIFY(audio->notifyInterval() == 1000);   // Default

        audio->setNotifyInterval(500);

        QVERIFY(audio->notifyInterval() == 500);    // Custom

        audio->setNotifyInterval(1000);             // reset

    }

}

void tst_QAudioOutput::pullFile()

{

    if(available) {

        QVERIFY(file.exists());

        file.open(QIODevice::ReadOnly);

        QSignalSpy readSignal(audio, SIGNAL(notify()));

        QSignalSpy stateSignal(audio, SIGNAL(stateChanged(QAudio::State)));

        audio->setNotifyInterval(100);

        // Always have default states, before start

        QVERIFY(audio->state() == QAudio::StoppedState);

        QVERIFY(audio->error() == QAudio::NoError);

        QVERIFY(audio->elapsedUSecs() == 0);

        audio->start(&file);

        QTest::qWait(20); // wait 20ms

        // Check state, bytesFree() and periodSize() are valid non-zero values.

        QVERIFY(audio->state() == QAudio::ActiveState);

        QVERIFY(audio->error() == QAudio::NoError);

        QVERIFY(audio->periodSize() > 0);

        QVERIFY(audio->elapsedUSecs() > 10000 && audio->elapsedUSecs() < 800000);

        QVERIFY(stateSignal.count() == 1); // State changed to QAudio::ActiveState

        // Wait until finished...

        QTestEventLoop::instance().enterLoop(1);

        QCOMPARE(audio->processedUSecs(), qint64(692250));

#ifdef Q_OS_WINCE

        // 4.wav is a little less than 700ms, so notify should fire 4 times on Wince!

        QVERIFY(readSignal.count() >= 4);

#else

        // 4.wav is a little less than 700ms, so notify should fire 6 times!

        QVERIFY(readSignal.count() >= 6);

#endif

        audio->stop();

        QTest::qWait(20); // wait 20ms

        QVERIFY(audio->state() == QAudio::StoppedState);

        QVERIFY(audio->elapsedUSecs() == 0);

        // Can only check to make sure we got at least 1 more signal, but can be more.

        QVERIFY(stateSignal.count() > 1);

        file.close();

    }

}

void tst_QAudioOutput::pushFile()

{

    if(available) {

        QVERIFY(file.exists());

        file.open(QIODevice::ReadOnly);

        const qint64 fileSize = file.size();

        QIODevice* feed = audio->start();

        char* buffer = new char[fileSize];

        file.read(buffer, fileSize);

        qint64 counter=0;

        qint64 written=0;

        while(written < fileSize) {

            written+=feed->write(buffer+written,fileSize-written);

            QTest::qWait(20);

            counter++;

        }

        QTestEventLoop::instance().enterLoop(1);

        QVERIFY(written == fileSize);

        QVERIFY(audio->processedUSecs() == 692250);

        audio->stop();

        file.close();

        delete [] buffer;

        delete audio;

    }

}

QTEST_MAIN(tst_QAudioOutput)

#include "tst_qaudiooutput.moc"