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/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
/*
Sonic Visualiser
An audio file viewer and annotation editor.
Centre for Digital Music, Queen Mary, University of London.
This file copyright 2006 Chris Cannam.
This program 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. See the file
COPYING included with this distribution for more information.
*/
#ifndef _MP3_FILE_READER_H_
#define _MP3_FILE_READER_H_
#ifdef HAVE_MAD
#include "CodedAudioFileReader.h"
#include "base/Thread.h"
#include <mad.h>
#include <set>
class ProgressReporter;
class MP3FileReader : public CodedAudioFileReader
{
Q_OBJECT
public:
enum DecodeMode {
DecodeAtOnce, // decode the file on construction, with progress
DecodeThreaded // decode in a background thread after construction
};
MP3FileReader(FileSource source,
DecodeMode decodeMode,
CacheMode cacheMode,
sv_samplerate_t targetRate = 0,
bool normalised = false,
ProgressReporter *reporter = 0);
virtual ~MP3FileReader();
virtual QString getError() const { return m_error; }
virtual QString getLocation() const { return m_source.getLocation(); }
virtual QString getTitle() const { return m_title; }
virtual QString getMaker() const { return m_maker; }
virtual TagMap getTags() const { return m_tags; }
static void getSupportedExtensions(std::set<QString> &extensions);
static bool supportsExtension(QString ext);
static bool supportsContentType(QString type);
static bool supports(FileSource &source);
virtual int getDecodeCompletion() const { return m_completion; }
virtual bool isUpdating() const {
return m_decodeThread && m_decodeThread->isRunning();
}
public slots:
void cancelled();
protected:
FileSource m_source;
QString m_path;
QString m_error;
QString m_title;
QString m_maker;
TagMap m_tags;
sv_frame_t m_fileSize;
double m_bitrateNum;
int m_bitrateDenom;
int m_completion;
bool m_done;
unsigned char *m_filebuffer;
float **m_samplebuffer;
int m_samplebuffersize;
ProgressReporter *m_reporter;
bool m_cancelled;
struct DecoderData
{
unsigned char const *start;
unsigned long length;
MP3FileReader *reader;
};
bool decode(void *mm, sv_frame_t sz);
enum mad_flow accept(struct mad_header const *, struct mad_pcm *);
static enum mad_flow input(void *, struct mad_stream *);
static enum mad_flow output(void *, struct mad_header const *, struct mad_pcm *);
static enum mad_flow error(void *, struct mad_stream *, struct mad_frame *);
class DecodeThread : public Thread
{
public:
DecodeThread(MP3FileReader *reader) : m_reader(reader) { }
virtual void run();
protected:
MP3FileReader *m_reader;
};
DecodeThread *m_decodeThread;
void loadTags();
QString loadTag(void *vtag, const char *name);
};
#endif
#endif
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