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1 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
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2
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3 /*
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4 Sonic Visualiser
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5 An audio file viewer and annotation editor.
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6 Centre for Digital Music, Queen Mary, University of London.
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7 This file copyright 2006 Chris Cannam.
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8
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9 This program is free software; you can redistribute it and/or
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10 modify it under the terms of the GNU General Public License as
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11 published by the Free Software Foundation; either version 2 of the
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12 License, or (at your option) any later version. See the file
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13 COPYING included with this distribution for more information.
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14 */
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15
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16 #ifndef _MP3_FILE_READER_H_
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17 #define _MP3_FILE_READER_H_
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18
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19 #ifdef HAVE_MAD
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20
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21 #include "CodedAudioFileReader.h"
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22
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23 #include <mad.h>
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24
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25 #include <set>
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26
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27 class QProgressDialog;
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28
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29 class MP3FileReader : public CodedAudioFileReader
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30 {
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31 public:
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32 MP3FileReader(QString path, bool showProgress, CacheMode cacheMode);
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33 virtual ~MP3FileReader();
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34
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35 virtual QString getError() const { return m_error; }
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36
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37 static void getSupportedExtensions(std::set<QString> &extensions);
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38
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39 protected:
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40 QString m_path;
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41 QString m_error;
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42 size_t m_fileSize;
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43 double m_bitrateNum;
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44 size_t m_bitrateDenom;
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45
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46 QProgressDialog *m_progress;
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47 bool m_cancelled;
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48
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49 struct DecoderData
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50 {
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51 unsigned char const *start;
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52 unsigned long length;
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53 MP3FileReader *reader;
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54 };
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55
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56 bool decode(void *mm, size_t sz);
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57 enum mad_flow accept(struct mad_header const *, struct mad_pcm *);
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58
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59 static enum mad_flow input(void *, struct mad_stream *);
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60 static enum mad_flow output(void *, struct mad_header const *, struct mad_pcm *);
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61 static enum mad_flow error(void *, struct mad_stream *, struct mad_frame *);
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62 };
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63
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64 #endif
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65
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66 #endif
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