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// 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 <QThread>
#include <QList>
#include <QMutex>
#include <QWaitCondition>
#include <QObject>
#include <QStringList>
#include "fileinfo.h"
#include "filetag.h"
class QObject;
class QIODevice;
class Decoder;
class DecoderFactory;
class Buffer;
class Recycler;
class Output;
class Visualization;
class DecoderState
{
public:
enum Type { Decoding, Stopped, Finished, Error };
DecoderState(Type t)
: m_type(t), m_error_msg(0)
{}
DecoderState(const QString &e)
: m_type(Error)
{
m_error_msg = new QString(e);
}
DecoderState()
: m_type(Stopped), m_error_msg(0)
{}
~DecoderState()
{
if (m_error_msg)
delete m_error_msg;
}
const QString *errorMessage() const
{
return m_error_msg;
}
const Type &type() const
{
return m_type;
}
private:
Type m_type;
const QString *m_error_msg;
};
class Decoder : public QThread
{
Q_OBJECT
public:
Decoder(QObject *parent, DecoderFactory *d,
QIODevice *i, Output *o);
virtual ~Decoder();
// Standard Decoder API
virtual bool initialize() = 0;
virtual double lengthInSeconds() = 0;
virtual void seek(double) = 0;
virtual void stop() = 0;
DecoderFactory *factory() const
{
return fctry;
}
QIODevice *input()
{
return in;
}
Output *output()
{
return out;
}
QMutex *mutex()
{
return &mtx;
}
QWaitCondition *cond()
{
return &cnd;
}
void setBlockSize(unsigned int sz)
{
blksize = sz;
}
unsigned int blockSize() const
{
return blksize;
}
ulong produceSound(char *data, ulong output_bytes, ulong bitrate, int nch);
void setEQ(int bands[10], int preamp);
void setEQEnabled(bool on) { m_useEQ = on; };
// static methods
static QStringList all();
static bool supports(const QString &);
//static void registerFactory(DecoderFactory *);
static Decoder *create(QObject *, const QString &, QIODevice *, Output *);
static DecoderFactory *findByPath(const QString&);
static DecoderFactory *findByMime(const QString&);
static DecoderFactory *findByContent(QIODevice *);
static FileTag *createTag(const QString&);
static QString filter();
static QStringList nameFilters();
static QList<DecoderFactory*> *decoderFactories();
static QStringList decoderFiles();
signals:
void stateChanged(const DecoderState&);
protected:
void dispatch(DecoderState::Type);
void dispatch(const DecoderState&);
void error(const QString&);
private:
DecoderFactory *fctry;
QList<QObject*> listeners;
QIODevice *in;
Output *out;
QMutex mtx;
QWaitCondition cnd;
uint blksize;
bool m_eqInited;
bool m_useEQ;
};
#endif // DECODER_H
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