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shadedvisual.cpp

/***************************************************************************
 *   Copyright (C) 2007 by Ilya Kotov                                      *
 *   forkotov02@hotmail.ru                                                 *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/

#include <QTimer>
#include <math.h>
#include "skin.h"
#include "mainvisual.h"
#include "inlines.h"


#include "shadedvisual.h"

ShadedVisual::ShadedVisual(QWidget *parent)
        : Visual(parent)
{
    setFixedSize(38,5);
    m_pixmap = QPixmap (38,5);
    m_skin = Skin::getPointer();
    m_timer = new QTimer(this);
    connect(m_timer, SIGNAL (timeout()), this, SLOT (timeout()));
    connect(m_skin, SIGNAL(skinChanged()), this, SLOT(updateSkin()));
    m_timer->setInterval(50);
    m_timer->start();
    clear();
}


ShadedVisual::~ShadedVisual()
{}

void ShadedVisual::add(Buffer *b, unsigned long w, int c, int p)
{
    if (!m_timer->isActive ())
        return;
    long len = b->nbytes, cnt;
    short *l = 0, *r = 0;

    len /= c;
    len /= ( p / 8 );
    if ( len > 512 )
        len = 512;
    cnt = len;

    if ( c == 2 )
    {
        l = new short[len];
        r = new short[len];

        if ( p == 8 )
            stereo16_from_stereopcm8 ( l, r, b->data, cnt );
        else if ( p == 16 )
            stereo16_from_stereopcm16 ( l, r, ( short * ) b->data, cnt );
    }
    else if ( c == 1 )
    {
        l = new short[len];

        if ( p == 8 )
            mono16_from_monopcm8 ( l, b->data, cnt );
        else if ( p == 16 )
            mono16_from_monopcm16 ( l, ( short * ) b->data, cnt );
    }
    else
        len = 0;

    if (len)
        m_nodes.append (new VisualNode (l, r, len, w));
}

void ShadedVisual::clear()
{
    while (!m_nodes.isEmpty())
        m_nodes.removeFirst();
    m_l = 0;
    m_r = 0;
    m_pixmap.fill(m_skin->getVisColor(0));
    update();
};

void ShadedVisual::timeout()
{
    VisualNode *node = 0;
    m_pixmap.fill(m_skin->getVisColor(0));

    if ( /*playing &&*/ output())
    {
        //output()->mutex()->lock ();
        //long olat = output()->latency();
        //long owrt = output()->written();
        //output()->mutex()->unlock();

        //long synctime = owrt < olat ? 0 : owrt - olat;

        mutex()->lock ();
        VisualNode *prev = 0;
        while ((!m_nodes.isEmpty()))
        {
            node = m_nodes.takeFirst();
            /*if ( node->offset > synctime )
               break;*/

            if (prev)
                delete prev;
            prev = node;
        }
        mutex()->unlock();
        node = prev;
    }

    if (!node)
        return;
    process (node);
    delete node;
    QPainter p(&m_pixmap);
    draw (&p);
    update();
}

void ShadedVisual::process (VisualNode *node)
{
    if (!node)
        return;

    int step = (node->length << 8)/74;
    int pos = 0;
    int l = 0;
    int r = 0;
    int j_l = 0, j_r = 0;

    for (int i = 0; i < 75; ++i)
    {
        pos += step;

        if (node->left)
        {
            j_l = abs((node->left[pos >> 8] >> 12));

            if (j_l > 15)
                j_l = 15;
            l = qMax(l, j_l);
        }
        if (node->right)
        {
            j_r = abs((node->right[pos >> 8] >> 12));
            if (j_r > 15)
                j_r = 15;
            r = qMax(r, j_r);
        }
    }
    m_l -= 0.5;
    m_l = m_l > l ? m_l : l;
    m_r -= 0.5;
    m_r = m_r > r ? m_r : r;
}

void ShadedVisual::draw (QPainter *p)
{
    for (int i = 0; i < m_l; ++i)
    {
        p->fillRect (i*3, 0, 3, 2, QBrush(m_skin->getVisColor (17-i)));
    }
    for (int i = 0; i < m_r; ++i)
    {
        p->fillRect (i*3, 3, 3, 2, QBrush(m_skin->getVisColor (17-i)));
    }
}

void ShadedVisual::paintEvent (QPaintEvent *)
{
    QPainter painter (this);
    painter.drawPixmap (0,0,m_pixmap);
}

void ShadedVisual::hideEvent (QHideEvent *)
{
    m_timer->stop();
}

void ShadedVisual::showEvent (QShowEvent *)
{
    m_timer->start();
}

void ShadedVisual::updateSkin()
{
    clear();
}


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