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/* This file is part of the KDE project
* Copyright (C) 2002 Ryan Cumming <bodnar42@phalynx.dhs.org>
*
* 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 version 2.
*
* 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; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
*/
#include <config.h>
#include "kfile_wav.h"
#include <kprocess.h>
#include <klocale.h>
#include <kgenericfactory.h>
#include <kstringvalidator.h>
#include <kdebug.h>
#include <qdict.h>
#include <qvalidator.h>
#include <qcstring.h>
#include <qfile.h>
#include <qdatetime.h>
#if !defined(__osf__)
#include <inttypes.h>
#else
typedef unsigned short uint16_t;
typedef unsigned int uint32_t;
#endif
typedef KGenericFactory<KWavPlugin> WavFactory;
K_EXPORT_COMPONENT_FACTORY(kfile_wav, WavFactory( "kfile_wav" ))
KWavPlugin::KWavPlugin(QObject *parent, const char *name,
const QStringList &args)
: KFilePlugin(parent, name, args)
{
KFileMimeTypeInfo* info = addMimeTypeInfo( "audio/x-wav" );
KFileMimeTypeInfo::GroupInfo* group = 0L;
// "the" group
group = addGroupInfo(info, "Technical", i18n("Technical Details"));
KFileMimeTypeInfo::ItemInfo* item;
item = addItemInfo(group, "Sample Size", i18n("Sample Size"), QVariant::Int);
setSuffix(item, i18n(" bits"));
item = addItemInfo(group, "Sample Rate", i18n("Sample Rate"), QVariant::Int);
setSuffix(item, i18n(" Hz"));
item = addItemInfo(group, "Channels", i18n("Channels"), QVariant::Int);
item = addItemInfo(group, "Length", i18n("Length"), QVariant::Int);
setAttributes(item, KFileMimeTypeInfo::Cummulative);
setUnit(item, KFileMimeTypeInfo::Seconds);
}
bool KWavPlugin::readInfo( KFileMetaInfo& info, uint /*what*/)
{
if ( info.path().isEmpty() ) // remote file
return false;
QFile file(info.path());
uint32_t format_size;
uint16_t format_tag;
uint16_t channel_count;
uint32_t sample_rate;
uint32_t bytes_per_second;
uint16_t bytes_per_sample;
uint16_t sample_size;
uint32_t data_size;
uint32_t unknown_chunk_size;
uint16_t unknown_chunk16;
bool have_fmt = false;
bool have_data = false;
QIODevice::Offset file_length;
const char *riff_signature = "RIFF";
const char *wav_signature = "WAVE";
const char *fmt_signature = "fmt ";
const char *data_signature = "data";
char signature_buffer[4];
if (!file.open(IO_ReadOnly))
{
kdDebug(7034) << "Couldn't open " << QFile::encodeName(info.path()) << endl;
return false;
}
file_length = file.size() - 100; // a bit of insurance
QDataStream dstream(&file);
// WAV files are little-endian
dstream.setByteOrder(QDataStream::LittleEndian);
// Read and verify the RIFF signature
dstream.readRawBytes(signature_buffer, 4);
if (memcmp(signature_buffer, riff_signature, 4))
return false;
// Skip the next bit (total file size, pretty useless)
file.at(8);
// Read and verify the WAVE signature
dstream.readRawBytes(signature_buffer, 4);
if (memcmp(signature_buffer, wav_signature, 4))
return false;
// pretty dumb scanner, but better than what we had!
do
{
dstream.readRawBytes(signature_buffer, 4);
if (!memcmp(signature_buffer, fmt_signature, 4)) {
dstream >> format_size;
dstream >> format_tag;
dstream >> channel_count;
dstream >> sample_rate;
dstream >> bytes_per_second;
dstream >> bytes_per_sample;
dstream >> sample_size;
have_fmt = true;
if ( format_size > 16 ) {
for (unsigned int i = 0; i < (format_size-16+1)/2; i++)
dstream >> unknown_chunk16;
}
} else if (!memcmp(signature_buffer, data_signature, 4)) {
dstream >> data_size;
have_data = true;
} else {
dstream >> unknown_chunk_size;
for (unsigned int i = 0; i < (unknown_chunk_size+1)/2; i++)
dstream >> unknown_chunk16;
}
if (have_data && have_fmt)
break;
} while (file.at() < file_length);
if ( (!have_data) || (!have_fmt) )
return false;
// These values are downright illegal
if ((!channel_count) || (!bytes_per_second))
return false;
KFileMetaInfoGroup group = appendGroup(info, "Technical");
appendItem(group, "Sample Size", int(sample_size));
appendItem(group, "Sample Rate", int(sample_rate));
appendItem(group, "Channels", int(channel_count));
unsigned int wav_seconds = data_size / bytes_per_second;
appendItem(group, "Length", int(wav_seconds));
return true;
}
#include "kfile_wav.moc"
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