diff options
Diffstat (limited to 'kfile-plugins/au/kfile_au.cpp')
| -rw-r--r-- | kfile-plugins/au/kfile_au.cpp | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/kfile-plugins/au/kfile_au.cpp b/kfile-plugins/au/kfile_au.cpp new file mode 100644 index 00000000..084bd669 --- /dev/null +++ b/kfile-plugins/au/kfile_au.cpp @@ -0,0 +1,172 @@ +/* This file is part of the KDE project + * Copyright (C) 2002 Shane Wright <me@shanewright.co.uk> + * + * 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_au.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 long uint32_t; +typedef unsigned short uint16_t; +#endif + +typedef KGenericFactory<KAuPlugin> AuFactory; + +K_EXPORT_COMPONENT_FACTORY(kfile_au, AuFactory( "kfile_au" )) + +KAuPlugin::KAuPlugin(QObject *parent, const char *name, + const QStringList &args) + + : KFilePlugin(parent, name, args) +{ + KFileMimeTypeInfo* info = addMimeTypeInfo( "audio/basic" ); + + KFileMimeTypeInfo::GroupInfo* group = 0L; + + group = addGroupInfo(info, "Technical", i18n("Technical Details")); + + KFileMimeTypeInfo::ItemInfo* item; + + item = addItemInfo(group, "Length", i18n("Length"), QVariant::Int); + setSuffix(item, "s"); + + item = addItemInfo(group, "Sample Rate", i18n("Sample Rate"), QVariant::Int); + setSuffix(item, "Hz"); + + item = addItemInfo(group, "Channels", i18n("Channels"), QVariant::Int); + + item = addItemInfo(group, "Encoding", i18n("Encoding"), QVariant::String); + +} + +bool KAuPlugin::readInfo( KFileMetaInfo& info, uint what) +{ + // the file signature, wants to be tidier... + const char fsig[] = { 0x2e, 0x73, 0x6e, 0x64 }; + + // a dword buffer for input + char inbuf[4]; + + // some vars for the file properties + uint32_t datasize; + uint32_t encoding; + uint32_t samplerate; + uint32_t channels; + uint16_t bytespersample; + + if ( info.path().isEmpty() ) // remote file + return false; + + QFile file(info.path()); + + if (!file.open(IO_ReadOnly)) + { + kdDebug(7034) << "Couldn't open " << QFile::encodeName(info.path()) << endl; + return false; + } + + QDataStream dstream(&file); + + // AU files are big-endian + dstream.setByteOrder(QDataStream::BigEndian); + + + // Read and verify the signature + dstream.readRawBytes(inbuf, 4); + if (memcmp(fsig, inbuf, 4)) + return false; + + // skip unwanted bits + file.at(8); + + // grab the bits we want + dstream >> datasize; + dstream >> encoding; + dstream >> samplerate; + dstream >> channels; + + // add the info + KFileMetaInfoGroup group = appendGroup(info, "Technical"); + appendItem(group, "Sample Rate", (uint) samplerate); + appendItem(group, "Channels", (uint) channels); + + // work out the encoding + switch (encoding) { + case 1 : + appendItem(group, "Encoding", i18n("8-bit ISDN u-law")); + bytespersample = 1; + break; + case 2 : + appendItem(group, "Encoding", i18n("8-bit linear PCM [REF-PCM]")); + bytespersample = 1; + break; + case 3 : + appendItem(group, "Encoding", i18n("16-bit linear PCM")); + bytespersample = 2; + break; + case 4 : + appendItem(group, "Encoding", i18n("24-bit linear PCM")); + bytespersample = 3; + break; + case 5 : + appendItem(group, "Encoding", i18n("32-bit linear PCM")); + bytespersample = 4; + break; + case 6 : + appendItem(group, "Encoding", i18n("32-bit IEEE floating point")); + bytespersample = 4; + break; + case 7 : + appendItem(group, "Encoding", i18n("64-bit IEEE floating point")); + bytespersample = 8; + break; + case 23 : + appendItem(group, "Encoding", i18n("8-bit ISDN u-law compressed")); + bytespersample = 1; + break; + default : + appendItem(group, "Encoding", i18n("Unknown")); + bytespersample = 0; + } + + // work out length from bytespersample + channels + size + if ((channels > 0) && (datasize > 0) && (datasize != 0xFFFFFFFF) && (bytespersample > 0) && (samplerate > 0)) { + uint32_t length = datasize / channels / bytespersample / samplerate; + appendItem(group, "Length", (uint) length); + } else { + appendItem(group, "Length", "???"); + } + + return true; +} + +#include "kfile_au.moc" |