300 lines
10 KiB
C++
300 lines
10 KiB
C++
/*
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* Strawberry Music Player
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* Copyright 2022, Eoin O'Neill <eoinoneill1991@gmail.com>
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*
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* Strawberry is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Strawberry is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Strawberry. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "tagreadergme.h"
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#include <tag.h>
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#include <apefile.h>
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#include <QByteArray>
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#include <QString>
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#include <QChar>
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#include <QFileInfo>
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#include <QFile>
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#include <QTextStream>
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#include "core/logging.h"
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#include "core/timeconstants.h"
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#include "core/messagehandler.h"
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#include "tagreaderbase.h"
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#include "tagreadertaglib.h"
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bool GME::IsSupportedFormat(const QFileInfo &file_info) {
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return file_info.exists() && (file_info.completeSuffix().endsWith("spc", Qt::CaseInsensitive) || file_info.completeSuffix().endsWith("vgm"), Qt::CaseInsensitive);
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}
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bool GME::ReadFile(const QFileInfo &file_info, spb::tagreader::SongMetadata *song_info) {
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if (file_info.completeSuffix().endsWith("spc"), Qt::CaseInsensitive) {
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SPC::Read(file_info, song_info);
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return true;
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}
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if (file_info.completeSuffix().endsWith("vgm", Qt::CaseInsensitive)) {
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VGM::Read(file_info, song_info);
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return true;
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}
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return false;
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}
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quint32 GME::UnpackBytes32(const char *const bytes, size_t length) {
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Q_ASSERT(length <= 4 && length > 0);
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quint32 value = 0;
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for (size_t i = 0; i < length; i++) {
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value |= static_cast<unsigned char>(bytes[i]) << (8 * i);
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}
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return value;
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}
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void GME::SPC::Read(const QFileInfo &file_info, spb::tagreader::SongMetadata *song_info) {
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QFile file(file_info.filePath());
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if (!file.open(QIODevice::ReadOnly)) return;
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qLog(Debug) << "Reading tags from SPC file" << file_info.fileName();
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// Check for header -- more reliable than file name alone.
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if (!file.read(33).startsWith(QString("SNES-SPC700").toLatin1())) return;
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// First order of business -- get any tag values that exist within the core file information.
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// These only allow for a certain number of bytes per field,
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// so they will likely be overwritten either by the id666 standard or the APETAG format (as used by other players, such as foobar and winamp)
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//
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// Make sure to check id6 documentation before changing the read values!
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file.seek(HAS_ID6_OFFSET);
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bool has_id6 = (file.read(1)[0] == static_cast<char>(xID6_STATUS::ON));
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file.seek(SONG_TITLE_OFFSET);
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song_info->set_title(QString::fromLatin1(file.read(32)).toStdString());
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file.seek(GAME_TITLE_OFFSET);
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song_info->set_album(QString::fromLatin1(file.read(32)).toStdString());
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file.seek(ARTIST_OFFSET);
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song_info->set_artist(QString::fromLatin1(file.read(32)).toStdString());
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file.seek(INTRO_LENGTH_OFFSET);
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QByteArray length_bytes = file.read(INTRO_LENGTH_SIZE);
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quint64 length_in_sec = 0;
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if (length_bytes.size() >= INTRO_LENGTH_SIZE) {
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length_in_sec = ConvertSPCStringToNum(length_bytes);
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if (!length_in_sec || length_in_sec >= 0x1FFF) {
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// This means that parsing the length as a string failed, so get value LE.
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length_in_sec = length_bytes[0] | (length_bytes[1] << 8) | (length_bytes[2] << 16);
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}
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if (length_in_sec < 0x1FFF) {
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song_info->set_length_nanosec(length_in_sec * kNsecPerSec);
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}
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}
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file.seek(FADE_LENGTH_OFFSET);
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QByteArray fade_bytes = file.read(FADE_LENGTH_SIZE);
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if (fade_bytes.size() >= FADE_LENGTH_SIZE) {
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quint64 fade_length_in_ms = ConvertSPCStringToNum(fade_bytes);
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if (fade_length_in_ms > 0x7FFF) {
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fade_length_in_ms = fade_bytes[0] | (fade_bytes[1] << 8) | (fade_bytes[2] << 16) | (fade_bytes[3] << 24);
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}
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}
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// Check for XID6 data -- this is infrequently used, but being able to fill in data from this is ideal before trying to rely on APETAG values.
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// XID6 format follows EA's binary file format standard named "IFF"
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file.seek(XID6_OFFSET);
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if (has_id6 && file.read(4) == QString("xid6").toLatin1()) {
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QByteArray xid6_head_data = file.read(4);
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if (xid6_head_data.size() >= 4) {
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qint64 xid6_size = xid6_head_data[0] | (xid6_head_data[1] << 8) | (xid6_head_data[2] << 16) | xid6_head_data[3];
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// This should be the size remaining for entire ID6 block, but it seems that most files treat this as the size of the remaining header space...
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qLog(Debug) << file_info.fileName() << "has ID6 tag.";
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while ((file.pos()) + 4 < XID6_OFFSET + xid6_size) {
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QByteArray arr = file.read(4);
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if (arr.size() < 4) break;
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qint8 id = arr[0];
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qint8 type = arr[1];
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Q_UNUSED(id);
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Q_UNUSED(type);
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qint16 length = arr[2] | (arr[3] << 8);
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file.read(GetNextMemAddressAlign32bit(length));
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}
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}
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}
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// Music Players that support SPC tend to support additional tagging data as
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// an APETAG entry at the bottom of the file instead of writing into the xid6 tagging space.
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// This is where a lot of the extra data for a file is stored, such as genre or replaygain data.
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// This data is currently supported by TagLib, so we will simply use that for the remaining values.
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TagLib::APE::File ape(file_info.filePath().toStdString().data());
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if (ape.hasAPETag()) {
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TagLib::Tag *tag = ape.tag();
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if (!tag) return;
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TagReaderTagLib::Decode(tag->artist(), song_info->mutable_artist());
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TagReaderTagLib::Decode(tag->album(), song_info->mutable_album());
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TagReaderTagLib::Decode(tag->title(), song_info->mutable_title());
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TagReaderTagLib::Decode(tag->genre(), song_info->mutable_genre());
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song_info->set_track(tag->track());
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song_info->set_year(tag->year());
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}
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song_info->set_valid(true);
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song_info->set_filetype(spb::tagreader::SongMetadata_FileType_SPC);
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}
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qint16 GME::SPC::GetNextMemAddressAlign32bit(qint16 input) {
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return ((input + 0x3) & ~0x3);
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// Plus 0x3 for rounding up (not down), AND NOT to flatten out on a 32 bit level.
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}
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quint64 GME::SPC::ConvertSPCStringToNum(const QByteArray &arr) {
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quint64 result = 0;
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for (auto it = arr.begin(); it != arr.end(); it++) {
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unsigned int num = *it - '0';
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if (num > 9) break;
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result = (result * 10) + num; // Shift Left and add.
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}
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return result;
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}
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void GME::VGM::Read(const QFileInfo &file_info, spb::tagreader::SongMetadata *song_info) {
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QFile file(file_info.filePath());
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if (!file.open(QIODevice::ReadOnly)) return;
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qLog(Debug) << "Reading tags from VGM file" << file_info.fileName();
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if (!file.read(4).startsWith(QString("Vgm ").toLatin1())) return;
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file.seek(GD3_TAG_PTR);
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QByteArray gd3_head = file.read(4);
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if (gd3_head.size() < 4) return;
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quint64 pt = GME::UnpackBytes32(gd3_head, gd3_head.size());
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file.seek(SAMPLE_COUNT);
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QByteArray sample_count_bytes = file.read(4);
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file.seek(LOOP_SAMPLE_COUNT);
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QByteArray loop_count_bytes = file.read(4);
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quint64 length = 0;
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if (!GetPlaybackLength(sample_count_bytes, loop_count_bytes, length)) return;
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file.seek(GD3_TAG_PTR + pt);
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QByteArray gd3_version = file.read(4);
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file.seek(file.pos() + 4);
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QByteArray gd3_length_bytes = file.read(4);
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quint32 gd3_length = GME::UnpackBytes32(gd3_length_bytes, gd3_length_bytes.size());
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QByteArray gd3Data = file.read(gd3_length);
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QTextStream fileTagStream(gd3Data, QIODevice::ReadOnly);
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// Stored as 16 bit UTF string, two bytes per letter.
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#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
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fileTagStream.setEncoding(QStringConverter::Utf16);
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#else
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fileTagStream.setCodec("UTF-16");
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#endif
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QStringList strings = fileTagStream.readLine(0).split(QChar('\0'));
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if (strings.count() < 10) return;
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// VGM standard dictates string tag data exist in specific order.
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// Order alternates between English and Japanese version of data.
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// Read GD3 tag standard for more details.
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song_info->set_title(strings[0].toStdString());
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song_info->set_album(strings[2].toStdString());
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song_info->set_artist(strings[6].toStdString());
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song_info->set_year(strings[8].left(4).toInt());
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song_info->set_length_nanosec(length * kNsecPerMsec);
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song_info->set_valid(true);
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song_info->set_filetype(spb::tagreader::SongMetadata_FileType_VGM);
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}
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bool GME::VGM::GetPlaybackLength(const QByteArray &sample_count_bytes, const QByteArray &loop_count_bytes, quint64 &out_length) {
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if (sample_count_bytes.size() != 4) return false;
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if (loop_count_bytes.size() != 4) return false;
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quint64 sample_count = GME::UnpackBytes32(sample_count_bytes, sample_count_bytes.size());
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if (sample_count <= 0) return false;
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quint64 loop_sample_count = GME::UnpackBytes32(loop_count_bytes, loop_count_bytes.size());
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if (loop_sample_count <= 0) {
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out_length = sample_count * 1000 / SAMPLE_TIMEBASE;
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return true;
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}
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quint64 intro_length_ms = (sample_count - loop_sample_count) * 1000 / SAMPLE_TIMEBASE;
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quint64 loop_length_ms = (loop_sample_count) * 1000 / SAMPLE_TIMEBASE;
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out_length = intro_length_ms + (loop_length_ms * 2) + GST_GME_LOOP_TIME_MS;
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return true;
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}
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TagReaderGME::TagReaderGME() = default;
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TagReaderGME::~TagReaderGME() = default;
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bool TagReaderGME::IsMediaFile(const QString &filename) const {
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QFileInfo fileinfo(filename);
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return GME::IsSupportedFormat(fileinfo);
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}
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bool TagReaderGME::ReadFile(const QString &filename, spb::tagreader::SongMetadata *song) const {
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QFileInfo fileinfo(filename);
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return GME::ReadFile(fileinfo, song);
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}
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bool TagReaderGME::SaveFile(const QString&, const spb::tagreader::SongMetadata&) const {
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return false;
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}
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QByteArray TagReaderGME::LoadEmbeddedArt(const QString&) const {
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return QByteArray();
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}
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bool TagReaderGME::SaveEmbeddedArt(const QString&, const QByteArray&) {
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return false;
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}
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bool TagReaderGME::SaveSongPlaycountToFile(const QString&, const spb::tagreader::SongMetadata&) const {
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return false;
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}
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bool TagReaderGME::SaveSongRatingToFile(const QString&, const spb::tagreader::SongMetadata&) const {
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return false;
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}
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