annotate data/fileio/ResamplingWavFileReader.h @ 460:93fb1ebff76b

* Add persistent cache file support to FileSource (e.g. for RDF descriptions) * Query RDF plugin data in a background thread on startup
author Chris Cannam
date Fri, 17 Oct 2008 13:32:55 +0000
parents 183ee2a55fc7
children
rev   line source
Chris@297 1 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
Chris@297 2
Chris@297 3 /*
Chris@297 4 Sonic Visualiser
Chris@297 5 An audio file viewer and annotation editor.
Chris@297 6 Centre for Digital Music, Queen Mary, University of London.
Chris@297 7 This file copyright 2007 QMUL.
Chris@297 8
Chris@297 9 This program is free software; you can redistribute it and/or
Chris@297 10 modify it under the terms of the GNU General Public License as
Chris@297 11 published by the Free Software Foundation; either version 2 of the
Chris@297 12 License, or (at your option) any later version. See the file
Chris@297 13 COPYING included with this distribution for more information.
Chris@297 14 */
Chris@297 15
Chris@297 16 #ifndef _RESAMPLING_WAV_FILE_READER_H_
Chris@297 17 #define _RESAMPLING_WAV_FILE_READER_H_
Chris@297 18
Chris@297 19 #include "CodedAudioFileReader.h"
Chris@297 20
Chris@297 21 #include "base/Thread.h"
Chris@297 22
Chris@297 23 #include <set>
Chris@297 24
Chris@297 25 class WavFileReader;
Chris@392 26 class ProgressReporter;
Chris@297 27
Chris@297 28 class ResamplingWavFileReader : public CodedAudioFileReader
Chris@297 29 {
Chris@392 30 Q_OBJECT
Chris@297 31 public:
Chris@297 32 enum ResampleMode {
Chris@297 33 ResampleAtOnce, // resample the file on construction, with progress dialog
Chris@297 34 ResampleThreaded // resample in a background thread after construction
Chris@297 35 };
Chris@297 36
Chris@317 37 ResamplingWavFileReader(FileSource source,
Chris@297 38 ResampleMode resampleMode,
Chris@297 39 CacheMode cacheMode,
Chris@392 40 size_t targetRate = 0,
Chris@392 41 ProgressReporter *reporter = 0);
Chris@297 42 virtual ~ResamplingWavFileReader();
Chris@297 43
Chris@297 44 virtual QString getError() const { return m_error; }
Chris@345 45 virtual QString getLocation() const { return m_source.getLocation(); }
Chris@297 46 static void getSupportedExtensions(std::set<QString> &extensions);
Chris@316 47 static bool supportsExtension(QString ext);
Chris@316 48 static bool supportsContentType(QString type);
Chris@317 49 static bool supports(FileSource &source);
Chris@297 50
Chris@297 51 virtual int getDecodeCompletion() const { return m_completion; }
Chris@297 52
Chris@297 53 virtual bool isUpdating() const {
Chris@297 54 return m_decodeThread && m_decodeThread->isRunning();
Chris@297 55 }
Chris@297 56
Chris@392 57 public slots:
Chris@392 58 void cancelled();
Chris@392 59
Chris@297 60 protected:
Chris@317 61 FileSource m_source;
Chris@297 62 QString m_path;
Chris@297 63 QString m_error;
Chris@297 64 bool m_cancelled;
Chris@297 65 size_t m_processed;
Chris@297 66 int m_completion;
Chris@297 67
Chris@297 68 WavFileReader *m_original;
Chris@392 69 ProgressReporter *m_reporter;
Chris@297 70
Chris@297 71 void addBlock(const SampleBlock &frames);
Chris@297 72
Chris@297 73 class DecodeThread : public Thread
Chris@297 74 {
Chris@297 75 public:
Chris@297 76 DecodeThread(ResamplingWavFileReader *reader) : m_reader(reader) { }
Chris@297 77 virtual void run();
Chris@297 78
Chris@297 79 protected:
Chris@297 80 ResamplingWavFileReader *m_reader;
Chris@297 81 };
Chris@297 82
Chris@297 83 DecodeThread *m_decodeThread;
Chris@297 84 };
Chris@297 85
Chris@297 86 #endif
Chris@297 87