Chris@148: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
Chris@148: 
Chris@148: /*
Chris@148:     Sonic Visualiser
Chris@148:     An audio file viewer and annotation editor.
Chris@148:     Centre for Digital Music, Queen Mary, University of London.
Chris@148:     This file copyright 2006 Chris Cannam.
Chris@148:     
Chris@148:     This program is free software; you can redistribute it and/or
Chris@148:     modify it under the terms of the GNU General Public License as
Chris@148:     published by the Free Software Foundation; either version 2 of the
Chris@148:     License, or (at your option) any later version.  See the file
Chris@148:     COPYING included with this distribution for more information.
Chris@148: */
Chris@148: 
Chris@148: #ifndef _MP3_FILE_READER_H_
Chris@148: #define _MP3_FILE_READER_H_
Chris@148: 
Chris@148: #ifdef HAVE_MAD
Chris@148: 
Chris@148: #include "CodedAudioFileReader.h"
Chris@148: 
Chris@263: #include "base/Thread.h"
Chris@148: #include <mad.h>
Chris@148: 
Chris@157: #include <set>
Chris@157: 
Chris@392: class ProgressReporter;
Chris@148: 
Chris@148: class MP3FileReader : public CodedAudioFileReader
Chris@148: {
Chris@392:     Q_OBJECT
Chris@392: 
Chris@148: public:
Chris@263:     enum DecodeMode {
Chris@392:         DecodeAtOnce, // decode the file on construction, with progress
Chris@263:         DecodeThreaded // decode in a background thread after construction
Chris@263:     };
Chris@263: 
Chris@317:     MP3FileReader(FileSource source,
Chris@297:                   DecodeMode decodeMode,
Chris@297:                   CacheMode cacheMode,
Chris@1040:                   sv_samplerate_t targetRate = 0,
Chris@920:                   bool normalised = false,
Chris@392:                   ProgressReporter *reporter = 0);
Chris@148:     virtual ~MP3FileReader();
Chris@148: 
Chris@290:     virtual QString getError() const { return m_error; }
Chris@290: 
Chris@345:     virtual QString getLocation() const { return m_source.getLocation(); }
Chris@290:     virtual QString getTitle() const { return m_title; }
Chris@334:     virtual QString getMaker() const { return m_maker; }
Chris@632:     virtual TagMap getTags() const { return m_tags; }
Chris@271:     
Chris@290:     static void getSupportedExtensions(std::set<QString> &extensions);
Chris@316:     static bool supportsExtension(QString ext);
Chris@316:     static bool supportsContentType(QString type);
Chris@317:     static bool supports(FileSource &source);
Chris@316: 
Chris@265:     virtual int getDecodeCompletion() const { return m_completion; }
Chris@265: 
Chris@263:     virtual bool isUpdating() const {
Chris@263:         return m_decodeThread && m_decodeThread->isRunning();
Chris@263:     }
Chris@263: 
Chris@392: public slots:
Chris@392:     void cancelled();
Chris@392: 
Chris@148: protected:
Chris@317:     FileSource m_source;
Chris@290:     QString m_path;
Chris@290:     QString m_error;
Chris@290:     QString m_title;
Chris@333:     QString m_maker;
Chris@632:     TagMap m_tags;
Chris@1038:     sv_frame_t m_fileSize;
Chris@148:     double m_bitrateNum;
Chris@929:     int m_bitrateDenom;
Chris@265:     int m_completion;
Chris@263:     bool m_done;
Chris@263: 
Chris@263:     unsigned char *m_filebuffer;
Chris@297:     float **m_samplebuffer;
Chris@929:     int m_samplebuffersize;
Chris@148: 
Chris@392:     ProgressReporter *m_reporter;
Chris@148:     bool m_cancelled;
Chris@148: 
Chris@148:     struct DecoderData
Chris@148:     {
Chris@148: 	unsigned char const *start;
Chris@148: 	unsigned long length;
Chris@148: 	MP3FileReader *reader;
Chris@148:     };
Chris@148: 
Chris@1038:     bool decode(void *mm, sv_frame_t sz);
Chris@148:     enum mad_flow accept(struct mad_header const *, struct mad_pcm *);
Chris@148: 
Chris@148:     static enum mad_flow input(void *, struct mad_stream *);
Chris@148:     static enum mad_flow output(void *, struct mad_header const *, struct mad_pcm *);
Chris@148:     static enum mad_flow error(void *, struct mad_stream *, struct mad_frame *);
Chris@263: 
Chris@263:     class DecodeThread : public Thread
Chris@263:     {
Chris@263:     public:
Chris@263:         DecodeThread(MP3FileReader *reader) : m_reader(reader) { }
Chris@263:         virtual void run();
Chris@263: 
Chris@263:     protected:
Chris@263:         MP3FileReader *m_reader;
Chris@263:     };
Chris@263: 
Chris@263:     DecodeThread *m_decodeThread;
Chris@271: 
Chris@271:     void loadTags();
Chris@333:     QString loadTag(void *vtag, const char *name);
Chris@148: };
Chris@148: 
Chris@148: #endif
Chris@148: 
Chris@148: #endif