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/* This file is part of the KDE project
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* Copyright (C) 2002 Ryan Cumming <bodnar42@phalynx.dhs.org>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation version 2.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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*/
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#include <config.h>
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#include "tdefile_wav.h"
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#include <kprocess.h>
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#include <tdelocale.h>
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#include <kgenericfactory.h>
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#include <kstringvalidator.h>
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#include <kdebug.h>
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#include <tqdict.h>
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#include <tqvalidator.h>
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#include <tqcstring.h>
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#include <tqfile.h>
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#include <tqdatetime.h>
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#if !defined(__osf__)
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#include <inttypes.h>
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#else
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typedef unsigned short uint16_t;
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typedef unsigned int uint32_t;
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#endif
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typedef KGenericFactory<KWavPlugin> WavFactory;
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K_EXPORT_COMPONENT_FACTORY(tdefile_wav, WavFactory( "tdefile_wav" ))
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KWavPlugin::KWavPlugin(TQObject *parent, const char *name,
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const TQStringList &args)
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: KFilePlugin(parent, name, args)
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{
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KFileMimeTypeInfo* info = addMimeTypeInfo( "audio/x-wav" );
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KFileMimeTypeInfo::GroupInfo* group = 0L;
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// "the" group
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group = addGroupInfo(info, "Technical", i18n("Technical Details"));
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KFileMimeTypeInfo::ItemInfo* item;
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item = addItemInfo(group, "Sample Size", i18n("Sample Size"), TQVariant::Int);
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setSuffix(item, i18n(" bits"));
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item = addItemInfo(group, "Sample Rate", i18n("Sample Rate"), TQVariant::Int);
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setSuffix(item, i18n(" Hz"));
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item = addItemInfo(group, "Channels", i18n("Channels"), TQVariant::Int);
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item = addItemInfo(group, "Length", i18n("Length"), TQVariant::Int);
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setAttributes(item, KFileMimeTypeInfo::Cummulative);
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setUnit(item, KFileMimeTypeInfo::Seconds);
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}
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bool KWavPlugin::readInfo( KFileMetaInfo& info, uint /*what*/)
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{
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if ( info.path().isEmpty() ) // remote file
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return false;
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TQFile file(info.path());
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uint32_t format_size;
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uint16_t format_tag;
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uint16_t channel_count;
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uint32_t sample_rate;
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uint32_t bytes_per_second;
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uint16_t bytes_per_sample;
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uint16_t sample_size;
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uint32_t data_size;
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uint32_t unknown_chunk_size;
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uint16_t unknown_chunk16;
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bool have_fmt = false;
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bool have_data = false;
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TQIODevice::Offset file_length;
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const char *riff_signature = "RIFF";
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const char *wav_signature = "WAVE";
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const char *fmt_signature = "fmt ";
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const char *data_signature = "data";
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char signature_buffer[4];
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if (!file.open(IO_ReadOnly))
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{
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kdDebug(7034) << "Couldn't open " << TQFile::encodeName(info.path()).data() << endl;
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return false;
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}
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file_length = file.size() - 100; // a bit of insurance
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TQDataStream dstream(&file);
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// WAV files are little-endian
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dstream.setByteOrder(TQDataStream::LittleEndian);
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// Read and verify the RIFF signature
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dstream.readRawBytes(signature_buffer, 4);
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if (memcmp(signature_buffer, riff_signature, 4))
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return false;
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// Skip the next bit (total file size, pretty useless)
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file.at(8);
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// Read and verify the WAVE signature
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dstream.readRawBytes(signature_buffer, 4);
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if (memcmp(signature_buffer, wav_signature, 4))
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return false;
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// pretty dumb scanner, but better than what we had!
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do
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{
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dstream.readRawBytes(signature_buffer, 4);
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if (!memcmp(signature_buffer, fmt_signature, 4)) {
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dstream >> format_size;
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dstream >> format_tag;
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dstream >> channel_count;
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dstream >> sample_rate;
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dstream >> bytes_per_second;
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dstream >> bytes_per_sample;
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dstream >> sample_size;
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have_fmt = true;
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if ( format_size > 16 ) {
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for (unsigned int i = 0; i < (format_size-16+1)/2; i++)
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dstream >> unknown_chunk16;
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}
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} else if (!memcmp(signature_buffer, data_signature, 4)) {
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dstream >> data_size;
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have_data = true;
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} else {
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dstream >> unknown_chunk_size;
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for (unsigned int i = 0; i < (unknown_chunk_size+1)/2; i++)
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dstream >> unknown_chunk16;
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}
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if (have_data && have_fmt)
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break;
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} while (file.at() < file_length);
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if ( (!have_data) || (!have_fmt) )
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return false;
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// These values are downright illegal
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if ((!channel_count) || (!bytes_per_second))
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return false;
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KFileMetaInfoGroup group = appendGroup(info, "Technical");
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appendItem(group, "Sample Size", int(sample_size));
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appendItem(group, "Sample Rate", int(sample_rate));
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appendItem(group, "Channels", int(channel_count));
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unsigned int wav_seconds = data_size / bytes_per_second;
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appendItem(group, "Length", int(wav_seconds));
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return true;
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}
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#include "tdefile_wav.moc"
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