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Diffstat (limited to 'libs/taglib/taglib/mpeg/mpegfile.cpp')
| -rw-r--r-- | libs/taglib/taglib/mpeg/mpegfile.cpp | 593 |
1 files changed, 0 insertions, 593 deletions
diff --git a/libs/taglib/taglib/mpeg/mpegfile.cpp b/libs/taglib/taglib/mpeg/mpegfile.cpp deleted file mode 100644 index 024d811005..0000000000 --- a/libs/taglib/taglib/mpeg/mpegfile.cpp +++ /dev/null @@ -1,593 +0,0 @@ -/*************************************************************************** - copyright : (C) 2002 - 2008 by Scott Wheeler - email : wheeler@kde.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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 * - * 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 <tagunion.h> -#include <id3v2tag.h> -#include <id3v2header.h> -#include <id3v1tag.h> -#include <apefooter.h> -#include <apetag.h> -#include <tdebug.h> - -#include <bitset> - -#include "mpegfile.h" -#include "mpegheader.h" - -using namespace TagLib; - -namespace -{ - enum { ID3v2Index = 0, APEIndex = 1, ID3v1Index = 2 }; -} - -class MPEG::File::FilePrivate -{ -public: - FilePrivate(ID3v2::FrameFactory *frameFactory = ID3v2::FrameFactory::instance()) : - ID3v2FrameFactory(frameFactory), - ID3v2Location(-1), - ID3v2OriginalSize(0), - APELocation(-1), - APEFooterLocation(-1), - APEOriginalSize(0), - ID3v1Location(-1), - hasID3v2(false), - hasID3v1(false), - hasAPE(false), - properties(0) - { - - } - - ~FilePrivate() - { - delete properties; - } - - const ID3v2::FrameFactory *ID3v2FrameFactory; - - long ID3v2Location; - uint ID3v2OriginalSize; - - long APELocation; - long APEFooterLocation; - uint APEOriginalSize; - - long ID3v1Location; - - TagUnion tag; - - // These indicate whether the file *on disk* has these tags, not if - // this data structure does. This is used in computing offsets. - - bool hasID3v2; - bool hasID3v1; - bool hasAPE; - - Properties *properties; -}; - -//////////////////////////////////////////////////////////////////////////////// -// public members -//////////////////////////////////////////////////////////////////////////////// - -MPEG::File::File(FileName file, bool readProperties, - Properties::ReadStyle propertiesStyle) : TagLib::File(file) -{ - d = new FilePrivate; - - if(isOpen()) - read(readProperties, propertiesStyle); -} - -MPEG::File::File(FileName file, ID3v2::FrameFactory *frameFactory, - bool readProperties, Properties::ReadStyle propertiesStyle) : - TagLib::File(file) -{ - d = new FilePrivate(frameFactory); - - if(isOpen()) - read(readProperties, propertiesStyle); -} - -MPEG::File::~File() -{ - delete d; -} - -TagLib::Tag *MPEG::File::tag() const -{ - return &d->tag; -} - -MPEG::Properties *MPEG::File::audioProperties() const -{ - return d->properties; -} - -bool MPEG::File::save() -{ - return save(AllTags); -} - -bool MPEG::File::save(int tags) -{ - return save(tags, true); -} - -bool MPEG::File::save(int tags, bool stripOthers) -{ - if(tags == NoTags && stripOthers) - return strip(AllTags); - - if(!ID3v2Tag() && !ID3v1Tag() && !APETag()) { - - if((d->hasID3v1 || d->hasID3v2 || d->hasAPE) && stripOthers) - return strip(AllTags); - - return true; - } - - if(readOnly()) { - debug("MPEG::File::save() -- File is read only."); - return false; - } - - // Create the tags if we've been asked to. Copy the values from the tag that - // does exist into the new tag. - - if((tags & ID3v2) && ID3v1Tag()) - Tag::duplicate(ID3v1Tag(), ID3v2Tag(true), false); - - if((tags & ID3v1) && d->tag[ID3v2Index]) - Tag::duplicate(ID3v2Tag(), ID3v1Tag(true), false); - - bool success = true; - - if(ID3v2 & tags) { - - if(ID3v2Tag() && !ID3v2Tag()->isEmpty()) { - - if(!d->hasID3v2) - d->ID3v2Location = 0; - - insert(ID3v2Tag()->render(), d->ID3v2Location, d->ID3v2OriginalSize); - - d->hasID3v2 = true; - - // v1 tag location has changed, update if it exists - - if(ID3v1Tag()) - d->ID3v1Location = findID3v1(); - - // APE tag location has changed, update if it exists - - if(APETag()) - findAPE(); - } - else if(stripOthers) - success = strip(ID3v2, false) && success; - } - else if(d->hasID3v2 && stripOthers) - success = strip(ID3v2) && success; - - if(ID3v1 & tags) { - if(ID3v1Tag() && !ID3v1Tag()->isEmpty()) { - int offset = d->hasID3v1 ? -128 : 0; - seek(offset, End); - writeBlock(ID3v1Tag()->render()); - d->hasID3v1 = true; - d->ID3v1Location = findID3v1(); - } - else if(stripOthers) - success = strip(ID3v1) && success; - } - else if(d->hasID3v1 && stripOthers) - success = strip(ID3v1, false) && success; - - // Dont save an APE-tag unless one has been created - - if((APE & tags) && APETag()) { - if(d->hasAPE) - insert(APETag()->render(), d->APELocation, d->APEOriginalSize); - else { - if(d->hasID3v1) { - insert(APETag()->render(), d->ID3v1Location, 0); - d->APEOriginalSize = APETag()->footer()->completeTagSize(); - d->hasAPE = true; - d->APELocation = d->ID3v1Location; - d->ID3v1Location += d->APEOriginalSize; - } - else { - seek(0, End); - d->APELocation = tell(); - d->APEFooterLocation = d->APELocation - + d->tag.access<APE::Tag>(APEIndex, false)->footer()->completeTagSize() - - APE::Footer::size(); - writeBlock(APETag()->render()); - d->APEOriginalSize = APETag()->footer()->completeTagSize(); - d->hasAPE = true; - } - } - } - else if(d->hasAPE && stripOthers) - success = strip(APE, false) && success; - - return success; -} - -ID3v2::Tag *MPEG::File::ID3v2Tag(bool create) -{ - return d->tag.access<ID3v2::Tag>(ID3v2Index, create); -} - -ID3v1::Tag *MPEG::File::ID3v1Tag(bool create) -{ - return d->tag.access<ID3v1::Tag>(ID3v1Index, create); -} - -APE::Tag *MPEG::File::APETag(bool create) -{ - return d->tag.access<APE::Tag>(APEIndex, create); -} - -bool MPEG::File::strip(int tags) -{ - return strip(tags, true); -} - -bool MPEG::File::strip(int tags, bool freeMemory) -{ - if(readOnly()) { - debug("MPEG::File::strip() - Cannot strip tags from a read only file."); - return false; - } - - if((tags & ID3v2) && d->hasID3v2) { - removeBlock(d->ID3v2Location, d->ID3v2OriginalSize); - d->ID3v2Location = -1; - d->ID3v2OriginalSize = 0; - d->hasID3v2 = false; - - if(freeMemory) - d->tag.set(ID3v2Index, 0); - - // v1 tag location has changed, update if it exists - - if(ID3v1Tag()) - d->ID3v1Location = findID3v1(); - - // APE tag location has changed, update if it exists - - if(APETag()) - findAPE(); - } - - if((tags & ID3v1) && d->hasID3v1) { - truncate(d->ID3v1Location); - d->ID3v1Location = -1; - d->hasID3v1 = false; - - if(freeMemory) - d->tag.set(ID3v1Index, 0); - } - - if((tags & APE) && d->hasAPE) { - removeBlock(d->APELocation, d->APEOriginalSize); - d->APELocation = -1; - d->APEFooterLocation = -1; - d->hasAPE = false; - if(d->hasID3v1) { - if(d->ID3v1Location > d->APELocation) - d->ID3v1Location -= d->APEOriginalSize; - } - - if(freeMemory) - d->tag.set(APEIndex, 0); - } - - return true; -} - -void MPEG::File::setID3v2FrameFactory(const ID3v2::FrameFactory *factory) -{ - d->ID3v2FrameFactory = factory; -} - -long MPEG::File::nextFrameOffset(long position) -{ - bool foundLastSyncPattern = false; - - ByteVector buffer; - - while(true) { - seek(position); - buffer = readBlock(bufferSize()); - - if(buffer.size() <= 0) - return -1; - - if(foundLastSyncPattern && secondSynchByte(buffer[0])) - return position - 1; - - for(uint i = 0; i < buffer.size() - 1; i++) { - if(uchar(buffer[i]) == 0xff && secondSynchByte(buffer[i + 1])) - return position + i; - } - - foundLastSyncPattern = uchar(buffer[buffer.size() - 1]) == 0xff; - position += buffer.size(); - } -} - -long MPEG::File::previousFrameOffset(long position) -{ - bool foundFirstSyncPattern = false; - ByteVector buffer; - - while (position > 0) { - long size = ulong(position) < bufferSize() ? position : bufferSize(); - position -= size; - - seek(position); - buffer = readBlock(size); - - if(buffer.size() <= 0) - break; - - if(foundFirstSyncPattern && uchar(buffer[buffer.size() - 1]) == 0xff) - return position + buffer.size() - 1; - - for(int i = buffer.size() - 2; i >= 0; i--) { - if(uchar(buffer[i]) == 0xff && secondSynchByte(buffer[i + 1])) - return position + i; - } - - foundFirstSyncPattern = secondSynchByte(buffer[0]); - } - return -1; -} - -long MPEG::File::firstFrameOffset() -{ - long position = 0; - - if(ID3v2Tag()) - position = d->ID3v2Location + ID3v2Tag()->header()->completeTagSize(); - - return nextFrameOffset(position); -} - -long MPEG::File::lastFrameOffset() -{ - return previousFrameOffset(ID3v1Tag() ? d->ID3v1Location - 1 : length()); -} - -//////////////////////////////////////////////////////////////////////////////// -// private members -//////////////////////////////////////////////////////////////////////////////// - -void MPEG::File::read(bool readProperties, Properties::ReadStyle propertiesStyle) -{ - // Look for an ID3v2 tag - - d->ID3v2Location = findID3v2(); - - if(d->ID3v2Location >= 0) { - - d->tag.set(ID3v2Index, new ID3v2::Tag(this, d->ID3v2Location, d->ID3v2FrameFactory)); - - d->ID3v2OriginalSize = ID3v2Tag()->header()->completeTagSize(); - - if(ID3v2Tag()->header()->tagSize() <= 0) - d->tag.set(ID3v2Index, 0); - else - d->hasID3v2 = true; - } - - // Look for an ID3v1 tag - - d->ID3v1Location = findID3v1(); - - if(d->ID3v1Location >= 0) { - d->tag.set(ID3v1Index, new ID3v1::Tag(this, d->ID3v1Location)); - d->hasID3v1 = true; - } - - // Look for an APE tag - - findAPE(); - - if(d->APELocation >= 0) { - - d->tag.set(APEIndex, new APE::Tag(this, d->APEFooterLocation)); - d->APEOriginalSize = APETag()->footer()->completeTagSize(); - d->hasAPE = true; - } - - if(readProperties) - d->properties = new Properties(this, propertiesStyle); - - // Make sure that we have our default tag types available. - - ID3v2Tag(true); - ID3v1Tag(true); -} - -long MPEG::File::findID3v2() -{ - // This method is based on the contents of TagLib::File::find(), but because - // of some subtlteies -- specifically the need to look for the bit pattern of - // an MPEG sync, it has been modified for use here. - - if(isValid() && ID3v2::Header::fileIdentifier().size() <= bufferSize()) { - - // The position in the file that the current buffer starts at. - - long bufferOffset = 0; - ByteVector buffer; - - // These variables are used to keep track of a partial match that happens at - // the end of a buffer. - - int previousPartialMatch = -1; - bool previousPartialSynchMatch = false; - - // Save the location of the current read pointer. We will restore the - // position using seek() before all returns. - - long originalPosition = tell(); - - // Start the search at the beginning of the file. - - seek(0); - - // This loop is the crux of the find method. There are three cases that we - // want to account for: - // (1) The previously searched buffer contained a partial match of the search - // pattern and we want to see if the next one starts with the remainder of - // that pattern. - // - // (2) The search pattern is wholly contained within the current buffer. - // - // (3) The current buffer ends with a partial match of the pattern. We will - // note this for use in the next itteration, where we will check for the rest - // of the pattern. - - for(buffer = readBlock(bufferSize()); buffer.size() > 0; buffer = readBlock(bufferSize())) { - - // (1) previous partial match - - if(previousPartialSynchMatch && secondSynchByte(buffer[0])) - return -1; - - if(previousPartialMatch >= 0 && int(bufferSize()) > previousPartialMatch) { - const int patternOffset = (bufferSize() - previousPartialMatch); - if(buffer.containsAt(ID3v2::Header::fileIdentifier(), 0, patternOffset)) { - seek(originalPosition); - return bufferOffset - bufferSize() + previousPartialMatch; - } - } - - // (2) pattern contained in current buffer - - long location = buffer.find(ID3v2::Header::fileIdentifier()); - if(location >= 0) { - seek(originalPosition); - return bufferOffset + location; - } - - int firstSynchByte = buffer.find(char(uchar(255))); - - // Here we have to loop because there could be several of the first - // (11111111) byte, and we want to check all such instances until we find - // a full match (11111111 111) or hit the end of the buffer. - - while(firstSynchByte >= 0) { - - // if this *is not* at the end of the buffer - - if(firstSynchByte < int(buffer.size()) - 1) { - if(secondSynchByte(buffer[firstSynchByte + 1])) { - // We've found the frame synch pattern. - seek(originalPosition); - return -1; - } - else { - - // We found 11111111 at the end of the current buffer indicating a - // partial match of the synch pattern. The find() below should - // return -1 and break out of the loop. - - previousPartialSynchMatch = true; - } - } - - // Check in the rest of the buffer. - - firstSynchByte = buffer.find(char(uchar(255)), firstSynchByte + 1); - } - - // (3) partial match - - previousPartialMatch = buffer.endsWithPartialMatch(ID3v2::Header::fileIdentifier()); - - bufferOffset += bufferSize(); - } - - // Since we hit the end of the file, reset the status before continuing. - - clear(); - - seek(originalPosition); - } - - return -1; -} - -long MPEG::File::findID3v1() -{ - if(isValid()) { - seek(-128, End); - long p = tell(); - - if(readBlock(3) == ID3v1::Tag::fileIdentifier()) - return p; - } - return -1; -} - -void MPEG::File::findAPE() -{ - if(isValid()) { - seek(d->hasID3v1 ? -160 : -32, End); - - long p = tell(); - - if(readBlock(8) == APE::Tag::fileIdentifier()) { - d->APEFooterLocation = p; - seek(d->APEFooterLocation); - APE::Footer footer(readBlock(APE::Footer::size())); - d->APELocation = d->APEFooterLocation - footer.completeTagSize() - + APE::Footer::size(); - return; - } - } - - d->APELocation = -1; - d->APEFooterLocation = -1; -} - -bool MPEG::File::secondSynchByte(char byte) -{ - if(uchar(byte) == 0xff) - return false; - - std::bitset<8> b(byte); - - // check to see if the byte matches 111xxxxx - return b.test(7) && b.test(6) && b.test(5); -} |