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DSD Stream File (DSF) support

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This commit is contained in:
Stephen F. Booth
2023-09-25 21:38:46 +02:00
committed by Urs Fleisch
parent e275abb8a3
commit 39d1d68237
11 changed files with 622 additions and 0 deletions
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213
taglib/dsf/dsffile.cpp Normal file
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/***************************************************************************
copyright : (C) 2013-2023 Stephen F. Booth
email : me@sbooth.org
***************************************************************************/
/***************************************************************************
* This library is free software; you can redistribute it and/or modify *
* it under the terms of the GNU Lesser General Public License version *
* 2.1 as published by the Free Software Foundation. *
* *
* This library 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 *
* Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with this library; if not, write to the Free Software *
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA *
* 02110-1301 USA *
* *
* Alternatively, this file is available under the Mozilla Public *
* License Version 1.1. You may obtain a copy of the License at *
* http://www.mozilla.org/MPL/ *
***************************************************************************/
#include "dsffile.h"
#include "tdebug.h"
#include "tpropertymap.h"
#include "tagutils.h"
using namespace TagLib;
// The DSF specification is located at http://dsd-guide.com/sites/default/files/white-papers/DSFFileFormatSpec_E.pdf
class DSF::File::FilePrivate
{
public:
FilePrivate() = default;
~FilePrivate() = default;
FilePrivate(const FilePrivate &) = delete;
FilePrivate &operator=(const FilePrivate &) = delete;
long long fileSize = 0;
long long metadataOffset = 0;
std::unique_ptr<Properties> properties;
std::unique_ptr<ID3v2::Tag> tag;
};
bool DSF::File::isSupported(IOStream *stream)
{
// A DSF file has to start with "DSD "
const ByteVector id = Utils::readHeader(stream, 4, false);
return id.startsWith("DSD ");
}
DSF::File::File(FileName file, bool readProperties,
AudioProperties::ReadStyle propertiesStyle) :
TagLib::File(file),
d(std::make_unique<FilePrivate>())
{
if(isOpen())
read(propertiesStyle);
}
DSF::File::File(IOStream *stream, bool readProperties,
AudioProperties::ReadStyle propertiesStyle) :
TagLib::File(stream),
d(std::make_unique<FilePrivate>())
{
if(isOpen())
read(propertiesStyle);
}
DSF::File::~File() = default;
ID3v2::Tag *DSF::File::tag() const
{
return d->tag.get();
}
PropertyMap DSF::File::properties() const
{
return d->tag->properties();
}
PropertyMap DSF::File::setProperties(const PropertyMap &properties)
{
return d->tag->setProperties(properties);
}
DSF::Properties *DSF::File::audioProperties() const
{
return d->properties.get();
}
bool DSF::File::save()
{
if(readOnly()) {
debug("DSF::File::save() - Cannot save to a read only file.");
return false;
}
// Three things must be updated: the file size, the tag data, and the metadata offset
if(d->tag->isEmpty()) {
long long newFileSize = d->metadataOffset ? d->metadataOffset : d->fileSize;
// Update the file size
if(d->fileSize != newFileSize) {
insert(ByteVector::fromLongLong(newFileSize, false), 12, 8);
d->fileSize = newFileSize;
}
// Update the metadata offset to 0 since there is no longer a tag
if(d->metadataOffset) {
insert(ByteVector::fromLongLong(0ULL, false), 20, 8);
d->metadataOffset = 0;
}
// Delete the old tag
truncate(newFileSize);
}
else {
ByteVector tagData = d->tag->render();
long long newMetadataOffset = d->metadataOffset ? d->metadataOffset : d->fileSize;
long long newFileSize = newMetadataOffset + tagData.size();
long long oldTagSize = d->fileSize - newMetadataOffset;
// Update the file size
if(d->fileSize != newFileSize) {
insert(ByteVector::fromLongLong(newFileSize, false), 12, 8);
d->fileSize = newFileSize;
}
// Update the metadata offset
if(d->metadataOffset != newMetadataOffset) {
insert(ByteVector::fromLongLong(newMetadataOffset, false), 20, 8);
d->metadataOffset = newMetadataOffset;
}
// Delete the old tag and write the new one
insert(tagData, newMetadataOffset, static_cast<size_t>(oldTagSize));
}
return true;
}
void DSF::File::read(AudioProperties::ReadStyle propertiesStyle)
{
if(!isOpen())
return;
// A DSF file consists of four chunks: DSD chunk, format chunk, data chunk, and metadata chunk
// The file format is not chunked in the sense of a RIFF File, though
// DSD chunk
ByteVector chunkName = readBlock(4);
if(chunkName != "DSD ") {
debug("DSF::File::read() -- Not a DSF file.");
setValid(false);
return;
}
long long chunkSize = readBlock(8).toLongLong(false);
// Integrity check
if(chunkSize != 28) {
debug("DSF::File::read() -- File is corrupted, wrong chunk size");
setValid(false);
return;
}
d->fileSize = readBlock(8).toLongLong(false);
// File is malformed or corrupted
if(d->fileSize != length()) {
debug("DSF::File::read() -- File is corrupted wrong length");
setValid(false);
return;
}
d->metadataOffset = readBlock(8).toLongLong(false);
// File is malformed or corrupted
if(d->metadataOffset > d->fileSize) {
debug("DSF::File::read() -- Invalid metadata offset.");
setValid(false);
return;
}
// Format chunk
chunkName = readBlock(4);
if(chunkName != "fmt ") {
debug("DSF::File::read() -- Missing 'fmt ' chunk.");
setValid(false);
return;
}
chunkSize = readBlock(8).toLongLong(false);
d->properties = std::make_unique<Properties>(readBlock(chunkSize), propertiesStyle);
// Skip the data chunk
// A metadata offset of 0 indicates the absence of an ID3v2 tag
if(d->metadataOffset == 0)
d->tag = std::make_unique<ID3v2::Tag>();
else
d->tag = std::make_unique<ID3v2::Tag>(this, d->metadataOffset);
}

117
taglib/dsf/dsffile.h Normal file
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/***************************************************************************
copyright : (C) 2013-2023 Stephen F. Booth
email : me@sbooth.org
***************************************************************************/
/***************************************************************************
* This library is free software; you can redistribute it and/or modify *
* it under the terms of the GNU Lesser General Public License version *
* 2.1 as published by the Free Software Foundation. *
* *
* This library 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 *
* Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with this library; if not, write to the Free Software *
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA *
* 02110-1301 USA *
* *
* Alternatively, this file is available under the Mozilla Public *
* License Version 1.1. You may obtain a copy of the License at *
* http://www.mozilla.org/MPL/ *
***************************************************************************/
#ifndef TAGLIB_DSFFILE_H
#define TAGLIB_DSFFILE_H
#include <memory>
#include "taglib_export.h"
#include "tfile.h"
#include "dsfproperties.h"
#include "id3v2tag.h"
namespace TagLib {
namespace DSF {
class TAGLIB_EXPORT File : public TagLib::File {
public:
/*!
* Constructs a DSD stream file from \a file.
*
* \note In the current implementation, both \a readProperties and
* \a propertiesStyle are ignored. The audio properties are always
* read.
*/
File(FileName file, bool readProperties = true,
AudioProperties::ReadStyle propertiesStyle =
AudioProperties::Average);
/*!
* Constructs a DSD stream file from \a stream.
*
* \note In the current implementation, both \a readProperties and
* \a propertiesStyle are ignored. The audio properties are always
* read.
*
* \note TagLib will *not* take ownership of the stream, the caller is
* responsible for deleting it after the File object.
*/
File(IOStream *stream, bool readProperties = true,
AudioProperties::ReadStyle propertiesStyle =
AudioProperties::Average);
/*!
* Destroys this instance of the File.
*/
~File() override;
ID3v2::Tag *tag() const override;
/*!
* Implements the unified property interface -- export function.
* Forwards to ID3v2::Tag::properties().
*/
PropertyMap properties() const override;
/*!
* Implements the unified property interface -- import function.
* Forwards to ID3v2::Tag::setProperties().
*/
PropertyMap setProperties(const PropertyMap &) override;
/*!
* Returns the DSF::Properties for this file. If no audio properties
* were read then this will return a null pointer.
*/
Properties *audioProperties() const override;
/*!
* Save the file.
*
* This returns true if the save was successful.
*/
bool save() override;
/*!
* Returns whether or not the given \a stream can be opened as a DSF
* file.
*
* \note This method is designed to do a quick check. The result may
* not necessarily be correct.
*/
static bool isSupported(IOStream *stream);
private:
void read(AudioProperties::ReadStyle propertiesStyle);
class FilePrivate;
std::unique_ptr<FilePrivate> d;
};
} // namespace DSF
} // namespace TagLib
#endif

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taglib/dsf/dsfproperties.cpp Normal file
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/***************************************************************************
copyright : (C) 2013-2023 Stephen F. Booth
email : me@sbooth.org
***************************************************************************/
/***************************************************************************
* This library is free software; you can redistribute it and/or modify *
* it under the terms of the GNU Lesser General Public License version *
* 2.1 as published by the Free Software Foundation. *
* *
* This library 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 *
* Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with this library; if not, write to the Free Software *
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA *
* 02110-1301 USA *
* *
* Alternatively, this file is available under the Mozilla Public *
* License Version 1.1. You may obtain a copy of the License at *
* http://www.mozilla.org/MPL/ *
***************************************************************************/
#include "dsfproperties.h"
using namespace TagLib;
class DSF::Properties::PropertiesPrivate
{
public:
PropertiesPrivate() = default;
~PropertiesPrivate() = default;
PropertiesPrivate(const PropertiesPrivate &) = delete;
PropertiesPrivate &operator=(const PropertiesPrivate &) = delete;
// Nomenclature is from DSF file format specification
unsigned int formatVersion = 0;
unsigned int formatID = 0;
unsigned int channelType = 0;
unsigned int channelNum = 0;
unsigned int samplingFrequency = 0;
unsigned int bitsPerSample = 0;
long long sampleCount = 0;
unsigned int blockSizePerChannel = 0;
// Computed
unsigned int bitrate = 0;
unsigned int length = 0;
};
DSF::Properties::Properties(const ByteVector &data, ReadStyle style) :
AudioProperties(style),
d(std::make_unique<PropertiesPrivate>())
{
read(data);
}
DSF::Properties::~Properties() = default;
int DSF::Properties::lengthInMilliseconds() const
{
return d->length;
}
int DSF::Properties::bitrate() const
{
return d->bitrate;
}
int DSF::Properties::sampleRate() const
{
return d->samplingFrequency;
}
int DSF::Properties::channels() const
{
return d->channelNum;
}
int DSF::Properties::formatVersion() const
{
return d->formatVersion;
}
int DSF::Properties::formatID() const
{
return d->formatID;
}
int DSF::Properties::channelType() const
{
return d->channelType;
}
int DSF::Properties::bitsPerSample() const
{
return d->bitsPerSample;
}
long long DSF::Properties::sampleCount() const
{
return d->sampleCount;
}
int DSF::Properties::blockSizePerChannel() const
{
return d->blockSizePerChannel;
}
////////////////////////////////////////////////////////////////////////////////
// private members
////////////////////////////////////////////////////////////////////////////////
void DSF::Properties::read(const ByteVector &data)
{
d->formatVersion = data.toUInt(0U,false);
d->formatID = data.toUInt(4U,false);
d->channelType = data.toUInt(8U,false);
d->channelNum = data.toUInt(12U,false);
d->samplingFrequency = data.toUInt(16U,false);
d->bitsPerSample = data.toUInt(20U,false);
d->sampleCount = data.toLongLong(24U,false);
d->blockSizePerChannel = data.toUInt(32U,false);
d->bitrate
= static_cast<unsigned int>((d->samplingFrequency * d->bitsPerSample * d->channelNum) / 1000.0 + 0.5);
d->length
= d->samplingFrequency > 0 ? static_cast<unsigned int>(d->sampleCount * 1000.0 / d->samplingFrequency + 0.5) : 0;
}

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taglib/dsf/dsfproperties.h Normal file
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/***************************************************************************
copyright : (C) 2013-2023 Stephen F. Booth
email : me@sbooth.org
***************************************************************************/
/***************************************************************************
* This library is free software; you can redistribute it and/or modify *
* it under the terms of the GNU Lesser General Public License version *
* 2.1 as published by the Free Software Foundation. *
* *
* This library 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 *
* Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with this library; if not, write to the Free Software *
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA *
* 02110-1301 USA *
* *
* Alternatively, this file is available under the Mozilla Public *
* License Version 1.1. You may obtain a copy of the License at *
* http://www.mozilla.org/MPL/ *
***************************************************************************/
#ifndef TAGLIB_DSFPROPERTIES_H
#define TAGLIB_DSFPROPERTIES_H
#include <memory>
#include "taglib_export.h"
#include "tbytevector.h"
#include "audioproperties.h"
namespace TagLib {
namespace DSF {
class TAGLIB_EXPORT Properties : public AudioProperties {
public:
Properties(const ByteVector &data, ReadStyle style);
~Properties() override;
Properties(const Properties &) = delete;
Properties &operator=(const Properties &) = delete;
int lengthInMilliseconds() const override;
int bitrate() const override;
int sampleRate() const override;
int channels() const override;
int formatVersion() const;
int formatID() const;
/*!
* Channel type values: 1 = mono, 2 = stereo, 3 = 3 channels,
* 4 = quad, 5 = 4 channels, 6 = 5 channels, 7 = 5.1 channels
*/
int channelType() const;
int bitsPerSample() const;
long long sampleCount() const;
int blockSizePerChannel() const;
private:
void read(const ByteVector &data);
class PropertiesPrivate;
std::unique_ptr<PropertiesPrivate> d;
};
} // namespace DSF
} // namespace TagLib
#endif