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/*************************************************************************
AsciiEncoder.cpp - encoder for ASCII data
-------------------
begin : Sun Nov 26 2006
copyright : (C) 2006 by Thomas Eschenbacher
email : Thomas.Eschenbacher@gmx.de
***************************************************************************/
/***************************************************************************
* *
* 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. *
* *
***************************************************************************/
#include "config.h"
#include <math.h>
#include <stdlib.h>
#include <new>
#include <QApplication>
#include <QIODevice>
#include <QList>
#include <QVariant>
#include <KLocalizedString>
#include "libkwave/FileInfo.h"
#include "libkwave/Label.h"
#include "libkwave/LabelList.h"
#include "libkwave/MessageBox.h"
#include "libkwave/MetaDataList.h"
#include "libkwave/MultiTrackReader.h"
#include "libkwave/Parser.h"
#include "libkwave/Sample.h"
#include "libkwave/SampleReader.h"
#include "AsciiCodecPlugin.h"
#include "AsciiEncoder.h"
/***************************************************************************/
Kwave::AsciiEncoder::AsciiEncoder()
:Kwave::Encoder(), m_dst()
{
LOAD_MIME_TYPES
REGISTER_COMPRESSION_TYPES
}
/***************************************************************************/
Kwave::AsciiEncoder::~AsciiEncoder()
{
}
/***************************************************************************/
Kwave::Encoder *Kwave::AsciiEncoder::instance()
{
return new(std::nothrow) Kwave::AsciiEncoder();
}
/***************************************************************************/
QList<Kwave::FileProperty> Kwave::AsciiEncoder::supportedProperties()
{
// default is to support all known properties
Kwave::FileInfo info;
return info.allKnownProperties();
}
/***************************************************************************/
bool Kwave::AsciiEncoder::encode(QWidget *widget,
Kwave::MultiTrackReader &src,
QIODevice &dst,
const Kwave::MetaDataList &meta_data)
{
bool result = true;
qDebug("AsciiEncoder::encode()");
// get info: tracks, sample rate
const Kwave::FileInfo info(meta_data);
unsigned int tracks = info.tracks();
unsigned int bits = info.bits();
sample_index_t length = info.length();
do {
// open the output device
if (!dst.open(QIODevice::ReadWrite | QIODevice::Truncate)) {
Kwave::MessageBox::error(widget,
i18n("Unable to open the file for saving."));
result = false;
break;
}
// output device successfully opened
m_dst.setDevice(&dst);
// write out the default properties:
// sample rate, bits, tracks, length
m_dst << META_PREFIX << "'rate'=" << info.rate() << Qt::endl;
m_dst << META_PREFIX << "'tracks'=" << tracks << Qt::endl;
m_dst << META_PREFIX << "'bits'=" << bits << Qt::endl;
m_dst << META_PREFIX << "'length'=" << length << Qt::endl;
// write out all other, non-standard properties that we have
QMap<Kwave::FileProperty, QVariant> properties = info.properties();
QMap<Kwave::FileProperty, QVariant>::Iterator it;
QList<Kwave::FileProperty> supported = supportedProperties();
for (it=properties.begin(); it != properties.end(); ++it) {
Kwave::FileProperty p = it.key();
QVariant v = it.value();
if (!supported.contains(p))
continue;
if (!info.canLoadSave(p))
continue;
// write the property
m_dst << META_PREFIX << "'" << info.name(p) << "'='"
<< Kwave::Parser::escape(v.toString()).toUtf8()
<< "'" << Qt::endl;
}
// write out all labels
Kwave::LabelList labels(meta_data);
foreach (const Kwave::Label &label, labels) {
m_dst << META_PREFIX << "'label["
<< QString::number(label.pos()) << "]'='"
<< Kwave::Parser::escape(label.name()).toUtf8()
<< "'" << Qt::endl;
}
sample_index_t rest = length;
sample_index_t pos = 0;
while (rest-- && !src.isCanceled()) {
// write out one track per line
for (unsigned int track=0; track < tracks; track++) {
Kwave::SampleReader *reader = src[track];
Q_ASSERT(reader);
if (!reader) break;
// read one single sample
sample_t sample = 0;
if (!reader->eof()) (*reader) >> sample;
// print out the sample value
m_dst.setFieldWidth(9);
m_dst << sample;
// comma as separator between the samples
if (track != tracks-1)
m_dst << ", ";
}
// as comment: current position [samples]
m_dst << " # ";
m_dst.setFieldWidth(12);
m_dst << pos;
pos++;
// end of line
m_dst << Qt::endl;
}
} while (false);
// end of file
m_dst << "# EOF " << Qt::endl << Qt::endl;
m_dst.setDevice(nullptr);
dst.close();
return result;
}
/***************************************************************************/
/***************************************************************************/
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