decoder.h

// Copyright (c) 2000-2001 Brad Hughes <bhughes@trolltech.com>
//
// Use, modification and distribution is allowed without limitation,
// warranty, or liability of any kind.
//
 
#ifndef DECODER_H
#define DECODER_H
 
#include <QStringList>
#include <QList>
#include <QMap>
#include <QIODevice>
#include "qmmp.h"
#include "audioparameters.h"
#include "channelmap.h"
 
class QmmpPluginCache;
class DecoderFactory;
 
class QMMP_EXPORT Decoder
{
public:
    Decoder(QIODevice *input = 0);
    virtual ~Decoder();
    virtual bool initialize() = 0;
    virtual qint64 totalTime() const = 0;
    virtual void seek(qint64 time) = 0;
    virtual qint64 read(unsigned char *data, qint64 maxSize) = 0;
    virtual int bitrate() const = 0;
    virtual void next();
    virtual const QString nextURL() const;
    AudioParameters audioParameters() const;
    QMap<Qmmp::ReplayGainKey, double> replayGainInfo() const;
    void setReplayGainInfo(const QMap<Qmmp::ReplayGainKey,double> &rg);
    QIODevice *input();
    void addMetaData(const QMap<Qmmp::MetaData, QString> &metaData);
    bool hasMetaData() const;
    QMap<Qmmp::MetaData, QString> takeMetaData();
    void setProperty(Qmmp::TrackProperty key, const QVariant &value);
    void setProperties(const QMap<Qmmp::TrackProperty, QString> &properties);
    const QMap<Qmmp::TrackProperty, QString> &properties() const;
    static DecoderFactory *findByFilePath(const QString &path, bool useContent = false);
    static DecoderFactory *findByMime(const QString &mime);
    static DecoderFactory *findByContent(QIODevice *input);
    static DecoderFactory *findByProtocol(const QString &p);
    static QList<DecoderFactory *> findByFileExtension(const QString &path);
    static QList<DecoderFactory*> factories();
    static QList<DecoderFactory*> enabledFactories();
    static QStringList nameFilters();
    static QString file(DecoderFactory *factory);
    static QStringList protocols();
    static void setEnabled(DecoderFactory* factory, bool enable = true);
    static bool isEnabled(DecoderFactory* factory);
 
protected:
    void configure(quint32 srate, const ChannelMap &map, Qmmp::AudioFormat f = Qmmp::PCM_S16LE);
    void configure(quint32 srate, int channels, Qmmp::AudioFormat f = Qmmp::PCM_S16LE);
    void configure(const AudioParameters &p);
 
private:
    static void loadPlugins();
    static QList<QmmpPluginCache*> *m_cache;
    static QStringList m_disabledNames;
    AudioParameters m_parameters;
    QMap<Qmmp::TrackProperty, QString> m_properties;
    QIODevice *m_input;
    bool m_hasMetaData;
    QMap<Qmmp::MetaData, QString> m_metaData;
    QMap <Qmmp::ReplayGainKey, double> m_rg; //replay gain information
};
 
#endif // DECODER_H