decoder-mp3.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_MP3_H
#define ___DECODER_MP3_H

#define DEC_MP3     DEC_ID('M','P','3',' ')
#define DEC_MP3_STR "MP3"

#include <mad.h>
#include <id3tag.h>

#include "decoder.h"
#include "decoder-core.h"

#if MAD_F_FRACBITS != 28
#warning libmad with MAD_F_FRACBITS != 28 not tested
#endif

class cStream;

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

class cScanID3:public cSongInfo
{
  private:
    bool keepOpen, *urgent;
    //
    bool Abort( bool result );
    struct id3_tag *GetID3( struct mad_stream *stream, id3_length_t tagsize ) const;
    void ParseID3( const struct id3_tag *tag );
    void ParseStr( const struct id3_tag *tag, const char *id, char *&data );
    void ParsePic( const struct id3_tag *tag, const char *id, char *&name );
    int ParseXing( struct mad_bitptr *ptr, unsigned int bitlen ) const;
  protected:
      cStream * str;
  public:
      cScanID3( cStream * Str, bool * Urgent );
      virtual ~ cScanID3(  )
    {
    }
    virtual bool DoScan( bool KeepOpen = false );
    virtual void InfoHook( struct mad_header *header )
    {
    }
};

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

class cMP3Decoder:public cDecoder
{
  private:
    struct Decode ds;
    //
    struct mad_stream *stream;
    struct mad_frame *frame;
    struct mad_synth *synth;
    mad_timer_t playtime, skiptime;
    //
    struct FrameInfo
    {
        unsigned long long Pos;
        mad_timer_t Time;
    } *fi;
    int framenum, framemax, errcount, mute;
    //
    void Init( void );
    void Clean( void );
    struct Decode *Done( eDecodeStatus status );
    eDecodeStatus DecodeError( bool hdr );
    void MakeSkipTime( mad_timer_t * skiptime, mad_timer_t playtime, int secs, float bsecs );
  protected:
      cStream * str;
    cScanID3 *scan;
    bool isStream;
  public:
      cMP3Decoder( const char *Filename, bool preinit = true );
      virtual ~ cMP3Decoder(  );
    virtual bool Valid( void );
    virtual cFileInfo *FileInfo( void );
    virtual cSongInfo *SongInfo( bool get );
    virtual cPlayInfo *PlayInfo( void );
    virtual bool Start( void );
    virtual bool Stop( void );
    virtual bool Skip( int Seconds, float bsecs );
    virtual struct Decode *Decode( void );
};

#endif //___DECODER_MP3_H