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/* AUDEX CDDA EXTRACTOR
* Copyright (C) 2007-2014 Marco Nelles (audex@maniatek.com)
* <http://kde.maniatek.com/audex>
*
* 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 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "wavefilewriter.h"
WaveFileWriter::WaveFileWriter() {
p_data_written = 0;
p_endianess = LittleEndian;
}
WaveFileWriter::~WaveFileWriter() {
close();
}
bool WaveFileWriter::open(const QString& filename) {
close();
p_data_written = 0;
p_output_file.setFileName(filename);
if (p_output_file.open(QIODevice::WriteOnly)) {
p_filename = filename;
p_write_empty_header();
return TRUE;
} else {
return FALSE;
}
}
bool WaveFileWriter::isOpen() {
return p_output_file.isOpen();
}
QString WaveFileWriter::filename() const {
return p_filename;
}
void WaveFileWriter::setEndianess(const Endianess e) {
p_endianess = e;
}
WaveFileWriter::Endianess WaveFileWriter::endianess() {
return p_endianess;
}
void WaveFileWriter::close() {
if (isOpen()) {
if (p_data_written) {
//update wave header
p_update_header();
p_output_file.close();
} else {
p_output_file.close();
p_output_file.remove();
}
}
p_filename = QString::null;
}
void WaveFileWriter::write(const QByteArray& data) {
int len = data.size();
if (isOpen()) {
if (p_endianess == LittleEndian) {
qint64 ret = p_output_file.write(data);
if (ret==-1) {
emit error(p_output_file.errorString());
return;
}
} else {
if (data.size() % 2 > 0) {
kDebug() << "Data length is not a multiple of 2! Cannot write data.";
return;
}
//we need to swap the bytes
char* buffer = new char[len];
for (int i = 0; i < len-1; i += 2) {
buffer[i] = data.data()[i+1];
buffer[i+1] = data.data()[i];
}
p_output_file.write(buffer, len);
delete [] buffer;
}
p_data_written += len;
}
}
void WaveFileWriter::p_write_empty_header() {
static const unsigned char riffHeader[] = {
0x52, 0x49, 0x46, 0x46, // 0 "RIFF"
0x00, 0x00, 0x00, 0x00, // 4 wavSize
0x57, 0x41, 0x56, 0x45, // 8 "WAVE"
0x66, 0x6d, 0x74, 0x20, // 12 "fmt "
0x10, 0x00, 0x00, 0x00, // 16
0x01, 0x00, 0x02, 0x00, // 20
0x44, 0xac, 0x00, 0x00, // 24
0x10, 0xb1, 0x02, 0x00, // 28
0x04, 0x00, 0x10, 0x00, // 32
0x64, 0x61, 0x74, 0x61, // 36 "data"
0x00, 0x00, 0x00, 0x00 // 40 byteCount
};
p_output_file.write((char*)riffHeader, 44);
}
void WaveFileWriter::p_update_header() {
if (isOpen()) {
p_output_file.flush();
char c[4];
qint32 wavSize = p_data_written+44-8;
// jump to the wavSize position in the header
p_output_file.seek(4);
c[0] = (wavSize >> 0 ) & 0xff;
c[1] = (wavSize >> 8 ) & 0xff;
c[2] = (wavSize >> 16) & 0xff;
c[3] = (wavSize >> 24) & 0xff;
p_output_file.write(c, 4);
p_output_file.seek(40);
c[0] = (p_data_written >> 0 ) & 0xff;
c[1] = (p_data_written >> 8 ) & 0xff;
c[2] = (p_data_written >> 16) & 0xff;
c[3] = (p_data_written >> 24) & 0xff;
p_output_file.write(c, 4);
// jump back to the end
p_output_file.seek(p_output_file.size());
}
}
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