decoder.h

/*
 * MP3/MPlayer plugin to VDR (C++)
 *
 * (C) 2001-2005 Stefan Huelswitt <s.huelswitt@gmx.de>
 *
 * This code 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 code 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.
 * Or, point your browser to http://www.gnu.org/copyleft/gpl.html
 */

#ifndef ___DECODER_H
#define ___DECODER_H

#include <vdr/thread.h>
#include <vdr/tools.h>

// ----------------------------------------------------------------

class cCacheData;
class cFileObj;

extern int MakeHashBuff( const char *buff, int len );
#define MakeHash(str) MakeHashBuff((str),strlen(str))

// ----------------------------------------------------------------

class cSongInfo
{
  private:
    bool infoDone;
  protected:
    void Clear( void );
    void Set( cSongInfo * si );
    void FakeTitle( const char *filename, const char *extention = 0 );
    void InfoDone( void )
    {
        infoDone = true;
    }
  public:
      cSongInfo( void );
    ~cSongInfo(  );
    bool HasInfo( void )
    {
        return infoDone;
    }
    // Song
    char *Title, *Artist, *Album;
    int Year, Frames, Total;
    int SampleFreq, Channels, Bitrate, MaxBitrate, ChMode;
    // Normalize
    double Level, Peak;
    // Decoder
    int DecoderID;
};

// ----------------------------------------------------------------

class cFileInfo
{
  private:
    bool infoDone;
    int removable;
  protected:
    void Clear( void );
    void Set( cFileInfo * fi );
    void InfoDone( void )
    {
        infoDone = true;
    }
  public:
      cFileInfo( void );
    cFileInfo( const char *Name );
    ~cFileInfo(  );
    bool FileInfo( bool log = true );
    bool HasInfo( void )
    {
        return infoDone;
    }
    bool Removable( void );
    //
    char *Filename, *FsID;
    unsigned long long Filesize;
    time_t CTime;
    long FsType;
};

// ----------------------------------------------------------------

class cPlayInfo
{
  public:
    int Index, Total;
};

// ----------------------------------------------------------------

class cDecoder
{
  protected:
    char *filename;
    cMutex lock, locklock;
    int locked;
    bool urgentLock;
    //
    cPlayInfo pi;
    bool playing;
    //
    void Lock( bool urgent = false );
    void Unlock( void );
    bool TryLock( void );
  public:
      cDecoder( const char *Filename );
      virtual ~ cDecoder(  );
    //
    virtual cFileInfo *FileInfo( void )
    {
        return 0;
    }
    virtual cSongInfo *SongInfo( bool get )
    {
        return 0;
    }
    virtual cPlayInfo *PlayInfo( void )
    {
        return 0;
    }
    //
    virtual bool Valid( void ) = 0;
    virtual bool IsStream( void )
    {
        return false;
    }
    virtual bool Start( void ) = 0;
    virtual bool Stop( void ) = 0;
    virtual bool Skip( int Seconds, float bsecs )
    {
        return false;
    }
    virtual struct Decode *Decode( void ) = 0;
};

// ----------------------------------------------------------------

class cDecoders
{
  public:
    static cDecoder *FindDecoder( cFileObj * Obj );
    static const char *ID2Str( int id );
    static int Str2ID( const char *str );
};

// ----------------------------------------------------------------

#define CACHELINES 32

class cInfoCache
{
  private:
    cMutex lock;
    cList < cCacheData > lists[CACHELINES];
    time_t lasttime, lastpurge;
    bool modified;
    //
    char *CacheFile( void );
    void AddEntry( cCacheData * dat );
    void DelEntry( cCacheData * dat );
    cCacheData *FirstEntry( int hash );
    void Modified( void )
    {
        modified = true;
    }
  public:
      cInfoCache( void );
    void Save( bool force = false );
    void Load( void );
    void Purge( void );
    void Cache( cSongInfo * info, cFileInfo * file );
    cCacheData *Search( cFileInfo * file );
};

extern cInfoCache InfoCache;
extern char *cachedir;

#endif //___DECODER_H