wmlib_interface.cpp

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/*
 *  KCompactDisc - A CD drive interface for the KDE Project.
 *
 *  Copyright (C) 2007 Alexander Kern <alex.kern@gmx.de>
 *
 *  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, 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 */

#include "wmlib_interface.h"

#include <kdebug.h>
#include <klocale.h>

extern "C"
{
    // We don't have libWorkMan installed already, so get everything
    // from within our own directory
    #include "wmlib/include/wm_cdrom.h"
    #include "wmlib/include/wm_cdtext.h"
    #include "wmlib/include/wm_helpers.h"
}

#define TRACK_VALID(track) ((track) && (track <= m_tracks))

KWMLibCompactDiscPrivate::KWMLibCompactDiscPrivate(KCompactDisc *p,
    const QString &dev, const QString &audioSystem, const QString &audioDevice) :
    KCompactDiscPrivate(p, dev),
    m_handle(NULL),
    m_audioSystem(audioSystem),
    m_audioDevice(audioDevice)
{
    m_interface = m_audioSystem;
}

KWMLibCompactDiscPrivate::~KWMLibCompactDiscPrivate()
{
    if (m_handle) {
        wm_cd_destroy(m_handle);
    }
}

bool KWMLibCompactDiscPrivate::createInterface()
{
    QString devicePath;

    devicePath = KCompactDisc::cdromDeviceUrl(m_deviceName).path();

    // Debug.
    //wm_cd_set_verbosity(WM_MSG_LEVEL_DEBUG | WM_MSG_CLASS_ALL);

    int status = wm_cd_init(
        devicePath.toAscii().data(),
        m_audioSystem.toAscii().data(),
        m_audioDevice.toAscii().data(),
        NULL,
        &m_handle);

    if(!WM_CDS_ERROR(status)) {
        m_deviceVendor = QLatin1String(wm_drive_vendor(m_handle));
        m_deviceModel = QLatin1String(wm_drive_model(m_handle));
        m_deviceRevision = QLatin1String(wm_drive_revision(m_handle));

        Q_Q(KCompactDisc);
        emit q->discChanged(0);

        if (m_infoMode == KCompactDisc::Asynchronous) {
            timerExpired();
        } else {
            QTimer::singleShot(1000, this, SLOT(timerExpired()));
        }

        return true;
    }
    m_handle = NULL;
    return false;
}

unsigned KWMLibCompactDiscPrivate::trackLength(unsigned track)
{
    return (unsigned)wm_cd_gettracklen(m_handle, track);
}

bool KWMLibCompactDiscPrivate::isTrackAudio(unsigned track)
{
    return !wm_cd_gettrackdata(m_handle, track);
}

void KWMLibCompactDiscPrivate::playTrackPosition(unsigned track, unsigned position)
{
    unsigned firstTrack, lastTrack;

    firstTrack = TRACK_VALID(track) ? track : 1;
    lastTrack = firstTrack + 1;
    lastTrack = TRACK_VALID(lastTrack) ? lastTrack : WM_ENDTRACK;

    kDebug() << "play track " << firstTrack << " position "
         << position << endl;

    wm_cd_play(m_handle, firstTrack, position, lastTrack);
}

void KWMLibCompactDiscPrivate::pause()
{
    wm_cd_pause(m_handle);
}

void KWMLibCompactDiscPrivate::stop()
{
    wm_cd_stop(m_handle);
}

void KWMLibCompactDiscPrivate::eject()
{
    wm_cd_eject(m_handle);
}

void KWMLibCompactDiscPrivate::closetray()
{
    wm_cd_closetray(m_handle);
}

/* WM_VOLUME_MUTE ... WM_VOLUME_MAXIMAL */
/* WM_BALANCE_ALL_LEFTS .WM_BALANCE_SYMMETRED. WM_BALANCE_ALL_RIGHTS */
#define RANGE2PERCENT(x, min, max) (((x) - (min)) * 100)/ ((max) - (min))
#define PERCENT2RANGE(x, min, max) ((((x) * ((max) - (min))) / 100 ) + (min))
void KWMLibCompactDiscPrivate::setVolume(unsigned volume)
{
    int vol, bal;
    vol = PERCENT2RANGE(volume, WM_VOLUME_MUTE, WM_VOLUME_MAXIMAL);
    bal = wm_cd_getbalance(m_handle);
    wm_cd_volume(m_handle, vol, bal);
}

void KWMLibCompactDiscPrivate::setBalance(unsigned balance)
{
    int vol, bal;
    vol = wm_cd_getvolume(m_handle);
    bal = PERCENT2RANGE(balance, WM_BALANCE_ALL_LEFTS, WM_BALANCE_ALL_RIGHTS);
    wm_cd_volume(m_handle, vol, bal);
}

unsigned KWMLibCompactDiscPrivate::volume()
{
    int vol = wm_cd_getvolume(m_handle);
    unsigned volume = RANGE2PERCENT(vol, WM_VOLUME_MUTE, WM_VOLUME_MAXIMAL);
    return volume;
}

unsigned KWMLibCompactDiscPrivate::balance()
{
    int bal = wm_cd_getbalance(m_handle);
    unsigned balance = RANGE2PERCENT(bal, WM_BALANCE_ALL_LEFTS, WM_BALANCE_ALL_RIGHTS);

    return balance;
}

void KWMLibCompactDiscPrivate::queryMetadata()
{
    cdtext();
    //cddb();
}

KCompactDisc::DiscStatus KWMLibCompactDiscPrivate::discStatusTranslate(int status)
{
    switch (status) {
    case WM_CDM_TRACK_DONE:
    case WM_CDM_PLAYING:
    case WM_CDM_FORWARD:
        return KCompactDisc::Playing;
    case WM_CDM_PAUSED:
        return KCompactDisc::Paused;
    case WM_CDM_STOPPED:
        return KCompactDisc::Stopped;
    case WM_CDM_EJECTED:
        return KCompactDisc::Ejected;
    case WM_CDM_NO_DISC:
    case WM_CDM_UNKNOWN:
        return KCompactDisc::NoDisc;
    case WM_CDM_CDDAERROR:
    case WM_CDM_LOADING:
    case WM_CDM_BUFFERING:
        return KCompactDisc::NotReady;
    default:
        return KCompactDisc::Error;
    }
}

void KWMLibCompactDiscPrivate::timerExpired()
{
    KCompactDisc::DiscStatus status;
    unsigned track, i;
    Q_Q(KCompactDisc);

    status = discStatusTranslate(wm_cd_status(m_handle));

    if(m_status != status) {
        if(skipStatusChange(status))
            goto timerExpiredExit;

        m_status = status;

        switch(m_status) {
        case KCompactDisc::Ejected:
        case KCompactDisc::NoDisc:
            clearDiscInfo();
            break;
        default:
            if(m_tracks == 0) {
                m_tracks = wm_cd_getcountoftracks(m_handle);
                if(m_tracks > 0) {
                    kDebug() << "New disc with " << m_tracks << " tracks";
                    m_discId = wm_cddb_discid(m_handle);

                    for(i = 1; i <= m_tracks; i++) {
                        m_trackStartFrames.append(wm_cd_gettrackstart(m_handle, i));
                    }
                    m_trackStartFrames.append(wm_cd_gettrackstart(m_handle, i));

                    m_discLength = FRAMES2SEC(m_trackStartFrames[m_tracks] -
                        m_trackStartFrames[0]);

                    make_playlist();

                    m_trackArtists.append(i18n("Unknown Artist"));
                    m_trackTitles.append(i18n("Unknown Title"));
                    for(i = 1; i <= m_tracks; i++) {
                        m_trackArtists.append(i18n("Unknown Artist"));
                        m_trackTitles.append(ki18n("Track %1").subs(i, 2).toString());
                    }

kDebug() << "m_tracks " << m_tracks;
kDebug() << "m_trackStartFrames " << m_trackStartFrames;
kDebug() << "m_trackArtists " << m_trackArtists;
kDebug() << "m_trackTitles " << m_trackTitles;

                    emit q->discChanged(m_tracks);

                    if(m_autoMetadata)
                        queryMetadata();
                }
            }
            break;
        }
    }

    switch(m_status) {
    case KCompactDisc::Playing:
        m_trackPosition = wm_get_cur_pos_rel(m_handle);
        m_discPosition = wm_get_cur_pos_abs(m_handle) - FRAMES2SEC(m_trackStartFrames[0]);
        // Update the current playing position.
        if(m_seek) {
            kDebug() << "seek: " << m_seek << " trackPosition " << m_trackPosition;
            if(abs((long)(m_trackExpectedPosition - m_trackPosition)) > m_seek)
                m_seek = 0;
            else
                m_seek = abs((long)(m_trackExpectedPosition - m_trackPosition));
        }

        if(!m_seek) {
            emit q->playoutPositionChanged(m_trackPosition);
            //emit q->playoutDiscPositionChanged(m_discPosition);
        }

        // Per-event processing.
        track = wm_cd_getcurtrack(m_handle);

        if(m_track != track) {
            m_track = track;
            emit q->playoutTrackChanged(m_track);
        }
        break;

    case KCompactDisc::Stopped:
        m_seek = 0;
        m_track = 0;
        break;

    default:
        break;
    }

timerExpiredExit:
    // Now that we have incurred any delays caused by the signals, we'll start the timer.
    QTimer::singleShot(1000, this, SLOT(timerExpired()));
}

void KWMLibCompactDiscPrivate::cdtext()
{
    struct cdtext_info *info;
    unsigned i;
    Q_Q(KCompactDisc);

    info = wm_cd_get_cdtext(m_handle);

    if(!info || !info->valid || (unsigned)info->count_of_entries != (m_tracks + 1)) {
        kDebug() << "no or invalid CDTEXT";
        return;
    }

    m_trackArtists[0] = QLatin1String( reinterpret_cast<char*>(info->blocks[0]->performer[0]) );
    m_trackTitles[0] = QLatin1String( reinterpret_cast<char*>(info->blocks[0]->name[0]) );

    for(i = 1; i <= m_tracks; i++) {
            m_trackArtists[i] = QLatin1String( reinterpret_cast<char*>(info->blocks[0]->performer[i]) );
            m_trackTitles[i] =QLatin1String( reinterpret_cast<char*>(info->blocks[0]->name[i]) );
    }

    kDebug() << "CDTEXT";
    kDebug() << "m_trackArtists " << m_trackArtists;
    kDebug() << "m_trackTitles " << m_trackTitles;

    emit q->discInformation(KCompactDisc::Cdtext);
}

#include "wmlib_interface.moc"