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#include "AudioFile.h"
#include <sstream>
#include <algorithm>
#include <taglib.h>
#include <fileref.h>
#include <mpegfile.h>
#include <id3v2tag.h>
#include <vorbisfile.h>
#include <flacfile.h>
#include <xiphcomment.h>
#include <mp4file.h>
#include <mp4tag.h>
template <typename T, typename M>
inline T extractTag(M &map, const char *key)
{
T ret = 0;
std::stringstream stream(extractTag<std::string>(map, key));
stream >> ret;
return ret;
}
template <typename M>
inline bool extractTag(M &map, const char *key)
{
std::string str(extractTag<std::string>(map, key));
std::transform(str.begin(), str.end(), str.begin(), ::tolower);
return (str == "1" || str == "true");
}
template <>
inline std::string extractTag(const TagLib::ID3v2::FrameListMap &map, const char *key)
{
if (map[key].isEmpty())
return std::string();
return map[key].front()->toString().to8Bit(true);
}
template <>
inline std::string extractTag(const TagLib::Ogg::FieldListMap &map, const char *key)
{
if (map[key].isEmpty())
return std::string();
return map[key].front().to8Bit(true);
}
template <>
inline unsigned int extractTag(const TagLib::MP4::ItemListMap &map, const char *key)
{
if (!map[key].isValid())
return 0;
return map[key].toInt();
}
template <>
inline std::string extractTag(const TagLib::MP4::ItemListMap &map, const char *key)
{
if (!map[key].isValid())
return std::string();
return map[key].toStringList().toString().to8Bit(true);
}
template <>
inline bool extractTag(const TagLib::MP4::ItemListMap &map, const char *key)
{
if (!map[key].isValid())
return false;
return map[key].toBool();
}
AudioFile::AudioFile(const std::string &filename) :
m_isValid(false),
m_filename(filename),
m_track(0),
m_disc(0),
m_bpm(0),
m_year(0),
m_compilation(false)
{
TagLib::FileRef fileRef(filename.c_str());
if (fileRef.isNull() || !fileRef.tag())
return;
/* First we copy out everything TagLib actually supports. */
const TagLib::Tag *tag = fileRef.tag();
m_title = tag->title().to8Bit(true);
m_artist = tag->artist().to8Bit(true);
m_album = tag->album().to8Bit(true);
m_comment = tag->comment().to8Bit(true);
m_genre = tag->genre().to8Bit(true);
m_year = tag->year();
m_track = tag->track();
/* Now we look at format specific tags. */
if (TagLib::MPEG::File *file = dynamic_cast<TagLib::MPEG::File*>(fileRef.file())) {
if (file->ID3v2Tag()) {
const TagLib::ID3v2::FrameListMap &map = file->ID3v2Tag()->frameListMap();
m_disc = extractTag<unsigned int>(map, "TPOS");
m_bpm = extractTag<unsigned int>(map, "TBPM");
m_composer = extractTag<std::string>(map, "TCOM");
m_albumArtist = extractTag<std::string>(map, "TPE2");
m_compilation = extractTag<bool>(map, "TCMP");
}
} else if (TagLib::Ogg::Vorbis::File *file = dynamic_cast<TagLib::Ogg::Vorbis::File*>(fileRef.file())) {
if (file->tag()) {
const TagLib::Ogg::FieldListMap &map = file->tag()->fieldListMap();
m_disc = extractTag<unsigned int>(map, "DISCNUMBER");
m_bpm = extractTag<unsigned int>(map, "BPM");
m_composer = extractTag<std::string>(map, "COMPOSER");
m_compilation = extractTag<bool>(map, "COMPILATION");
}
} else if (TagLib::FLAC::File *file = dynamic_cast<TagLib::FLAC::File*>(fileRef.file())) {
if (file->xiphComment()) {
const TagLib::Ogg::FieldListMap &map = file->xiphComment()->fieldListMap();
m_disc = extractTag<unsigned int>(map, "DISCNUMBER");
m_bpm = extractTag<unsigned int>(map, "BPM");
m_composer = extractTag<std::string>(map, "COMPOSER");
m_compilation = extractTag<bool>(map, "COMPILATION");
}
} else if (TagLib::MP4::File *file = dynamic_cast<TagLib::MP4::File*>(fileRef.file())) {
if (file->tag()) {
const TagLib::MP4::ItemListMap &map = file->tag()->itemListMap();
m_disc = extractTag<unsigned int>(map, "disk");
m_bpm = extractTag<unsigned int>(map, "tmpo");
m_albumArtist = extractTag<std::string>(map, "aART");
m_composer = extractTag<std::string>(map, "\xa9wrt");
m_compilation = extractTag<bool>(map, "cpil");
}
}
m_isValid = true;
}
bool AudioFile::isValid() const
{
return m_isValid;
}
std::string AudioFile::filename() const
{
return m_filename;
}
std::string AudioFile::artist() const
{
return m_artist;
}
std::string AudioFile::composer() const
{
return m_composer;
}
std::string AudioFile::album() const
{
return m_album;
}
std::string AudioFile::albumArtist() const
{
return m_albumArtist;
}
std::string AudioFile::title() const
{
return m_title;
}
std::string AudioFile::genre() const
{
return m_genre;
}
std::string AudioFile::comment() const
{
return m_comment;
}
unsigned int AudioFile::track() const
{
return m_track;
}
unsigned int AudioFile::disc() const
{
return m_disc;
}
unsigned int AudioFile::bpm() const
{
return m_bpm;
}
unsigned int AudioFile::year() const
{
return m_year;
}
bool AudioFile::compilation() const
{
return m_compilation;
}
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