QWSSoundServerProvider Class Reference

Inheritance diagram for QWSSoundServerProvider:

Public Functions
int	add (int *mixl, int *mixr, int count)
bool	equal (int wid, int sid)
virtual bool	finished () const =0
int	getSample (int off, int bps)
int	groupId () const
bool	muted ()
	QWSSoundServerProvider (int w, int s)
virtual int	readySamples (int)=0
void	setMute (bool m)
void	setPriority (bool p)
void	setVolume (int lv, int rv)
int	soundId () const
void	startSampleRunin ()
virtual	~QWSSoundServerProvider ()

Static Public Functions
static void	setPlayPriorityOnly (bool p)

Protected Functions
int	devSamples ()
char *	prepareBuffer (int &size)
void	updateBuffer (int read)

Protected Variables
struct {
qint32   avgBytesPerSec
qint16   blockAlign
qint16   channels
qint16   formatTag
qint32   samplesPerSec
qint16   wBitsPerSample
}	chunkdata
int	dev
int	samples_due

Properties
uchar *	data
uchar	data1 [sound_buffer_size+4]
uchar	data2 [sound_buffer_size+4]
bool	isPriority
int	leftVolume
int *	max
int	max1
int	max2
bool	mMuted
int	mSid
int	mWid
int	out
int	rightVolume
int	sampleRunin

Static Private Attributes
static int	priorityExists = 0

Detailed Description

Definition at line 280 of file qsoundqss_qws.cpp.

Constructors and Destructors

QWSSoundServerProvider()

QWSSoundServerProvider::QWSSoundServerProvider ( int  w, int  s  )

inline

Definition at line 282 of file qsoundqss_qws.cpp.

    : mWid(w), mSid(s), mMuted(false)
    {
    leftVolume = maxVolume>>1;
    rightVolume = maxVolume>>1;
    isPriority = false;
        samples_due = 0;
    max1 = max2 = out = 0;// = sound_buffer_size;
    data = data1;
    max = &max1;
    sampleRunin = 0;
    dev = -1;
    }

~QWSSoundServerProvider()

virtual QWSSoundServerProvider::~QWSSoundServerProvider ( )

inlinevirtual

Definition at line 296 of file qsoundqss_qws.cpp.

                                      {
    }

Functions

add()

int QWSSoundServerProvider::add ( int *  mixl, int *  mixr, int  count  )

inline

Definition at line 350 of file qsoundqss_qws.cpp.

Referenced by QWSSoundServerPrivate::feedDevice().

    {
        int bytesPerSample = chunkdata.wBitsPerSample >> 3;

        if ( mMuted ) {
            sampleRunin -= qMin(sampleRunin,count);
            while (count && (dev != -1)) {
                if (out >= *max) {
                    // switch buffers
                    out = 0;
                    if (data == data1 && max2 != 0) {
                        data = data2;
                        max = &max2;
                        max1 = 0;
                    } else if (data == data2 && max1 != 0) {
                        data = data1;
                        max = &max1;
                        max2 = 0;
                    } else {
                        qDebug("QSS Read Error: both buffers empty");
                        return 0;
                    }
                }
                samples_due += sound_speed;
                while (count && samples_due >= chunkdata.samplesPerSec) {
                    samples_due -= chunkdata.samplesPerSec;
                    count--;
                }
                out += bytesPerSample * chunkdata.channels;
            }
            return count;
        }

        // This shouldn't be the case
        if ( !mixl || !mixr )
            return 0;

        int lVolNum = leftVolume, lVolDen = maxVolume;
        int rVolNum = rightVolume, rVolDen = maxVolume;
        if (priorityExists > 0 && !isPriority) {
            lVolNum = 0; // later, make this gradually fade in and out.
            lVolDen = 5;
            rVolNum = 0;
            rVolDen = 5;
        }

        while (count && (dev != -1)) {
            if (out >= *max) {
                // switch buffers
                out = 0;
                if (data == data1 && max2 != 0) {
                    data = data2;
                    max = &max2;
                    max1 = 0;
                } else if (data == data2 && max1 != 0) {
                    data = data1;
                    max = &max1;
                    max2 = 0;
                } else {
                    qDebug("QSS Read Error: both buffers empty");
                    return 0;
                }
            }
            samples_due += sound_speed;
            if (count && samples_due >= chunkdata.samplesPerSec) {
                int l = getSample(0,bytesPerSample)*lVolNum/lVolDen;
                int r = (chunkdata.channels == 2) ? getSample(1,bytesPerSample)*rVolNum/rVolDen : l;
                if (!sound_stereo && chunkdata.channels == 2)
                    l += r;
        if (sampleRunin) {
                    while (sampleRunin && count && samples_due >= chunkdata.samplesPerSec) {
                        mixl++;
                        if (sound_stereo)
                            mixr++;
                        samples_due -= chunkdata.samplesPerSec;
                sampleRunin--;
                        count--;
                    }
                }
                while (count && samples_due >= chunkdata.samplesPerSec) {
                    *mixl++ += l;
                    if (sound_stereo)
                        *mixr++ += r;
                    samples_due -= chunkdata.samplesPerSec;
                    count--;
                }
            }

            // optimize out manipulation of sample if downsampling and we skip it
            out += bytesPerSample * chunkdata.channels;
        }

        return count;
    }

devSamples()

int QWSSoundServerProvider::devSamples ( )

inlineprotected

Definition at line 481 of file qsoundqss_qws.cpp.

    {
    int possible = (((max1+max2-out) / ((chunkdata.wBitsPerSample>>3)*chunkdata.channels))
        *sound_speed)/chunkdata.samplesPerSec;

    return possible;
    }

equal()

bool QWSSoundServerProvider::equal ( int  wid, int  sid  )

inline

Definition at line 447 of file qsoundqss_qws.cpp.

Referenced by QWSSoundServerPrivate::pauseFile(), QWSSoundServerPrivate::resumeFile(), QWSSoundServerPrivate::setMute(), QWSSoundServerPrivate::setVolume(), and QWSSoundServerPrivate::stopFile().

    {
    return (wid == mWid && sid == mSid);
    }

finished()

virtual bool QWSSoundServerProvider::finished ( ) const

pure virtual

Implemented in QWSSoundServerStream, and QWSSoundServerBucket.

Referenced by QWSSoundServerPrivate::feedDevice().

getSample()

int QWSSoundServerProvider::getSample ( int  off, int  bps  )

inline

Definition at line 340 of file qsoundqss_qws.cpp.

                                    {

        //
        //  16-bit audio data is converted to native endian so that it can be scaled
        //  Yes, this is ugly on a BigEndian machine
        //  Perhaps it shouldn't be scaled at all
        //
        return (bps == 1) ? (data[out+off] - 128) * 128 : qToLittleEndian(((short*)data)[(out/2)+off]);
    }

groupId()

int QWSSoundServerProvider::groupId ( ) const

inline

Definition at line 299 of file qsoundqss_qws.cpp.

Referenced by QWSSoundServerPrivate::feedDevice(), QWSSoundServerPrivate::sendCompletedSignals(), and QWSSoundServerPrivate::stopAll().

{ return mWid; }

muted()

bool QWSSoundServerProvider::muted ( )

inline

Definition at line 314 of file qsoundqss_qws.cpp.

{ return mMuted; }

prepareBuffer()

char* QWSSoundServerProvider::prepareBuffer ( int &  size )

inlineprotected

Definition at line 454 of file qsoundqss_qws.cpp.

    {
    // keep reading as long as there is 50 % or more room in off buffer.
    if (data == data1 && (max2<<1 < sound_buffer_size)) {
        size=sound_buffer_size - max2;
        return (char *)data2;
    } else if (data == data2 && (max1<<1 < sound_buffer_size)) {
        size=sound_buffer_size - max1;
        return (char *)data1;
    } else {
        size = 0;
        return 0;
    }
    }

readySamples()

virtual int QWSSoundServerProvider::readySamples ( int  )

pure virtual

Implemented in QWSSoundServerStream, and QWSSoundServerBucket.

Referenced by QWSSoundServerPrivate::feedDevice().

setMute()

void QWSSoundServerProvider::setMute ( bool  m )

inline

Definition at line 313 of file qsoundqss_qws.cpp.

Referenced by QWSSoundServerPrivate::checkPresetVolumes(), QWSSoundServerPrivate::QWSSoundServerPrivate(), QWSSoundServerPrivate::setMute(), and QWSSoundServerPrivate::~QWSSoundServerPrivate().

{ mMuted = m; }

setPlayPriorityOnly()

static void QWSSoundServerProvider::setPlayPriorityOnly ( bool  p )

inlinestatic

Definition at line 323 of file qsoundqss_qws.cpp.

Referenced by QWSSoundServerPrivate::playPriorityOnly().

    {
    if (p)
        priorityExists++;
    else
        priorityExists--;

    if (priorityExists < 0)
        qDebug("QSS: got more priority offs than ons");
    }

setPriority()

void QWSSoundServerProvider::setPriority ( bool  p )

inline

Definition at line 316 of file qsoundqss_qws.cpp.

Referenced by QWSSoundServerPrivate::playFile(), and QWSSoundServerPrivate::playRawFile().

                             {
    if (p != isPriority) {
        isPriority = p; // currently meaningless.
    }
    }

setVolume()

void QWSSoundServerProvider::setVolume ( int  lv, int  rv  )

inline

Definition at line 308 of file qsoundqss_qws.cpp.

Referenced by QWSSoundServerPrivate::checkPresetVolumes(), QWSSoundServerPrivate::playFile(), QWSSoundServerPrivate::QWSSoundServerPrivate(), QWSSoundServerPrivate::setVolume(), and QWSSoundServerPrivate::~QWSSoundServerPrivate().

                                   {
    leftVolume = qMin(maxVolume, qMax(0, lv));
    rightVolume = qMin(maxVolume, qMax(0, rv));
    }

soundId()

int QWSSoundServerProvider::soundId ( ) const

inline

Definition at line 300 of file qsoundqss_qws.cpp.

Referenced by QWSSoundServerPrivate::feedDevice(), and QWSSoundServerPrivate::sendCompletedSignals().

{ return mSid; }

startSampleRunin()

void QWSSoundServerProvider::startSampleRunin ( )

inline

Definition at line 302 of file qsoundqss_qws.cpp.

                            {
    // inteded to provide even audio return from mute/pause/dead samples.
    //sampleRunin = runinLength; // or more?
    }

updateBuffer()

void QWSSoundServerProvider::updateBuffer ( int  read )

inlineprotected

Definition at line 469 of file qsoundqss_qws.cpp.

    {
    // always reads to off buffer.
    if (read >= 0) {
        if (data == data2) {
        max1 = read;
        } else {
        max2 = read;
        }
    }
    }

Properties

avgBytesPerSec

qint32 QWSSoundServerProvider::avgBytesPerSec

Definition at line 494 of file qsoundqss_qws.cpp.

blockAlign

qint16 QWSSoundServerProvider::blockAlign

Definition at line 495 of file qsoundqss_qws.cpp.

channels

qint16 QWSSoundServerProvider::channels

Definition at line 492 of file qsoundqss_qws.cpp.

Referenced by QWSSoundServerStream::QWSSoundServerStream(), and QWSSoundServerPrivate::~QWSSoundServerPrivate().

chunkdata

struct { ... } QWSSoundServerProvider::chunkdata

data

uchar* QWSSoundServerProvider::data

private

Definition at line 508 of file qsoundqss_qws.cpp.

Referenced by QWSSoundServerPrivate::feedDevice().

data1

uchar QWSSoundServerProvider::data1[sound_buffer_size+4]

private

Definition at line 509 of file qsoundqss_qws.cpp.

data2

uchar QWSSoundServerProvider::data2[sound_buffer_size+4]

private

Definition at line 510 of file qsoundqss_qws.cpp.

dev

int QWSSoundServerProvider::dev

protected

Definition at line 498 of file qsoundqss_qws.cpp.

formatTag

qint16 QWSSoundServerProvider::formatTag

Definition at line 491 of file qsoundqss_qws.cpp.

isPriority

bool QWSSoundServerProvider::isPriority

private

Definition at line 505 of file qsoundqss_qws.cpp.

leftVolume

int QWSSoundServerProvider::leftVolume

private

Definition at line 503 of file qsoundqss_qws.cpp.

max

int* QWSSoundServerProvider::max

private

Definition at line 507 of file qsoundqss_qws.cpp.

max1

int QWSSoundServerProvider::max1

private

Definition at line 511 of file qsoundqss_qws.cpp.

max2

int QWSSoundServerProvider::max2

private

Definition at line 511 of file qsoundqss_qws.cpp.

mMuted

bool QWSSoundServerProvider::mMuted

private

Definition at line 513 of file qsoundqss_qws.cpp.

mSid

int QWSSoundServerProvider::mSid

private

Definition at line 502 of file qsoundqss_qws.cpp.

mWid

int QWSSoundServerProvider::mWid

private

Definition at line 501 of file qsoundqss_qws.cpp.

out

int QWSSoundServerProvider::out

private

Definition at line 511 of file qsoundqss_qws.cpp.

priorityExists

int QWSSoundServerProvider::priorityExists = 0

staticprivate

Definition at line 506 of file qsoundqss_qws.cpp.

rightVolume

int QWSSoundServerProvider::rightVolume

private

Definition at line 504 of file qsoundqss_qws.cpp.

sampleRunin

int QWSSoundServerProvider::sampleRunin

private

Definition at line 512 of file qsoundqss_qws.cpp.

samples_due

int QWSSoundServerProvider::samples_due

protected

Definition at line 499 of file qsoundqss_qws.cpp.

samplesPerSec

qint32 QWSSoundServerProvider::samplesPerSec

Definition at line 493 of file qsoundqss_qws.cpp.

wBitsPerSample

qint16 QWSSoundServerProvider::wBitsPerSample

Definition at line 496 of file qsoundqss_qws.cpp.

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The documentation for this class was generated from the following file:

• /src/gui/embedded/qsoundqss_qws.cpp