annotate data/fileio/WavFileWriter.h @ 1833:21c792334c2e sensible-delimited-data-strings

Rewrite all the DelimitedDataString stuff so as to return vectors of individual cell strings rather than having the classes add the delimiters themselves. Rename accordingly to names based on StringExport. Take advantage of this in the CSV writer code so as to properly quote cells that contain delimiter characters.

/* -*- 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 SV_WAV_FILE_WRITER_H
#define SV_WAV_FILE_WRITER_H

#include <QString>

#ifdef Q_OS_WIN
#include <windows.h>
#define ENABLE_SNDFILE_WINDOWS_PROTOTYPES 1
#endif

#include <sndfile.h>

#include "base/BaseTypes.h"

class DenseTimeValueModel;
class MultiSelection;
class TempWriteFile;

class WavFileWriter
{
public:
    /**
     * Specify the method used to open the destination file.
     * 
     * If WriteToTemporary, the destination will be opened as a
     * temporary file which is moved to the target location when the
     * WavFileWriter is closed or deleted (to avoid clobbering an
     * existing file with a partially written replacement).
     * 
     * If WriteToTarget, the target file will be opened directly
     * (necessary when e.g. doing a series of incremental writes to a
     * file while keeping it open for reading).
     */
    enum FileWriteMode {
        WriteToTemporary,
        WriteToTarget
    };

    WavFileWriter(QString path, sv_samplerate_t sampleRate, int channels,
                  FileWriteMode mode);
    virtual ~WavFileWriter();

    bool isOK() const;

    virtual QString getError() const;

    QString getPath() const { return m_path; }

    bool writeModel(DenseTimeValueModel *source,
                    MultiSelection *selection = 0);

    /// Write samples from raw arrays; count is per-channel
    bool writeSamples(const float *const *samples, sv_frame_t count);

    /// As writeSamples, but compatible with WavFileReader api. More expensive.
    bool putInterleavedFrames(const floatvec_t &frames);

    bool close();

protected:
    QString m_path;
    sv_samplerate_t m_sampleRate;
    int m_channels;
    TempWriteFile *m_temp;
    SNDFILE *m_file;
    QString m_error;

    QString getWriteFilename() const;
};


#endif