diff options
Diffstat (limited to 'taglib/mod/modfile.cpp')
| -rw-r--r-- | taglib/mod/modfile.cpp | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/taglib/mod/modfile.cpp b/taglib/mod/modfile.cpp new file mode 100644 index 00000000..f242ea51 --- /dev/null +++ b/taglib/mod/modfile.cpp @@ -0,0 +1,174 @@ +/*************************************************************************** + copyright : (C) 2011 by Mathias Panzenböck + email : grosser.meister.morti@gmx.net + ***************************************************************************/ + +/*************************************************************************** + * 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 * + ***************************************************************************/ + +#include "modfile.h" +#include "tstringlist.h" +#include "tdebug.h" +#include "modfileprivate.h" + +using namespace TagLib; +using namespace Mod; + +class Mod::File::FilePrivate +{ +public: + FilePrivate(AudioProperties::ReadStyle propertiesStyle) + : properties(propertiesStyle) + { + } + + Mod::Tag tag; + Mod::Properties properties; +}; + +Mod::File::File(FileName file, bool readProperties, + AudioProperties::ReadStyle propertiesStyle) : + Mod::FileBase(file), + d(new FilePrivate(propertiesStyle)) +{ + read(readProperties); +} + +Mod::File::File(IOStream *stream, bool readProperties, + AudioProperties::ReadStyle propertiesStyle) : + Mod::FileBase(stream), + d(new FilePrivate(propertiesStyle)) +{ + read(readProperties); +} + +Mod::File::~File() +{ + delete d; +} + +Mod::Tag *Mod::File::tag() const +{ + return &d->tag; +} + +Mod::Properties *Mod::File::audioProperties() const +{ + return &d->properties; +} + +bool Mod::File::save() +{ + if(readOnly()) { + debug("Mod::File::save() - Cannot save to a read only file."); + return false; + } + seek(0); + writeString(d->tag.title(), 20); + StringList lines = d->tag.comment().split("\n"); + uint n = std::min(lines.size(), d->properties.instrumentCount()); + for(uint i = 0; i < n; ++ i) { + writeString(lines[i], 22); + seek(8, Current); + } + + for(uint i = n; i < d->properties.instrumentCount(); ++ i) { + writeString(String::null, 22); + seek(8, Current); + } + return true; +} + +void Mod::File::read(bool) +{ + if(!isOpen()) + return; + + seek(1080); + ByteVector modId = readBlock(4); + READ_ASSERT(modId.size() == 4); + + int channels = 4; + uint instruments = 31; + if(modId == "M.K." || modId == "M!K!" || modId == "M&K!" || modId == "N.T.") { + d->tag.setTrackerName("ProTracker"); + channels = 4; + } + else if(modId.startsWith("FLT") || modId.startsWith("TDZ")) { + d->tag.setTrackerName("StarTrekker"); + char digit = modId[3]; + READ_ASSERT(digit >= '0' && digit <= '9'); + channels = digit - '0'; + } + else if(modId.endsWith("CHN")) { + d->tag.setTrackerName("StarTrekker"); + char digit = modId[0]; + READ_ASSERT(digit >= '0' && digit <= '9'); + channels = digit - '0'; + } + else if(modId == "CD81" || modId == "OKTA") { + d->tag.setTrackerName("Atari Oktalyzer"); + channels = 8; + } + else if(modId.endsWith("CH") || modId.endsWith("CN")) { + d->tag.setTrackerName("TakeTracker"); + char digit = modId[0]; + READ_ASSERT(digit >= '0' && digit <= '9'); + channels = (digit - '0') * 10; + digit = modId[1]; + READ_ASSERT(digit >= '0' && digit <= '9'); + channels += digit - '0'; + } + else { + // Not sure if this is correct. I'd need a file + // created with NoiseTracker to check this. + d->tag.setTrackerName("NoiseTracker"); // probably + channels = 4; + instruments = 15; + } + d->properties.setChannels(channels); + d->properties.setInstrumentCount(instruments); + + seek(0); + READ_STRING(d->tag.setTitle, 20); + + StringList comment; + for(uint i = 0; i < instruments; ++ i) { + READ_STRING_AS(instrumentName, 22); + // value in words, * 2 (<< 1) for bytes: + READ_U16B_AS(sampleLength); + + READ_BYTE_AS(fineTuneByte); + int fineTune = fineTuneByte & 0xF; + // > 7 means negative value + if(fineTune > 7) fineTune -= 16; + + READ_BYTE_AS(volume); + if(volume > 64) volume = 64; + // volume in decibels: 20 * log10(volume / 64) + + // value in words, * 2 (<< 1) for bytes: + READ_U16B_AS(repeatStart); + // value in words, * 2 (<< 1) for bytes: + READ_U16B_AS(repatLength); + + comment.append(instrumentName); + } + + READ_BYTE(d->properties.setLengthInPatterns); + + d->tag.setComment(comment.toString("\n")); +} |