comparison data/fileio/WavFileReader.h @ 823:f0558e69a074

Rename Resampling- to DecodingWavFileReader, and use it whenever we have an audio file that is not quickly seekable using libsndfile. Avoids very slow performance when analysing ogg files.

 #include <sndfile.h>
 #include <QMutex>
 
 #include <set>
 
+/**
+ * Reader for audio files using libsndfile.
+ *
+ * This is typically intended for seekable file types that can be read
+ * directly (e.g. WAV, AIFF etc).
+ *
+ * Compressed files supported by libsndfile (e.g. Ogg, FLAC) should
+ * normally be read using DecodingWavFileReader instead (which decodes
+ * to an intermediate cached file).
+ */
 class WavFileReader : public AudioFileReader
 {
 public:
     WavFileReader(FileSource source, bool fileUpdating = false);
     virtual ~WavFileReader();
 
     virtual QString getLocation() const { return m_source.getLocation(); }
     virtual QString getError() const { return m_error; }
 
+    virtual bool isQuicklySeekable() const { return m_seekable; }
+    
     /** 
      * Must be safe to call from multiple threads with different
      * arguments on the same object at the same time.
      */
     virtual void getInterleavedFrames(size_t start, size_t count,

 
     FileSource m_source;
     QString m_path;
     QString m_error;
 
+    bool m_seekable;
+
     mutable QMutex m_mutex;
     mutable float *m_buffer;
     mutable size_t m_bufsiz;
     mutable size_t m_lastStart;
     mutable size_t m_lastCount;