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#include "track/serato/markers.h"
#include <QtEndian>
#include "track/serato/tags.h"
namespace {
const int kNumEntries = 14;
const int kLoopEntryStartIndex = 5;
const int kEntrySize = 22;
const quint16 kVersion = 0x0205;
// These functions convert between a custom 4-byte format (that we'll call
// "serato32" for brevity) and 3-byte plaintext (both quint32).
// Serato's custom format inserts a single null bit after every 7 payload
// bits, starting from the rightmost bit.
//
// Here's an example:
//
// | Hex Binary
// ---------------- | ----------- --------------------------------
// 3-byte plaintext | 00 00 cc 000 0000000 0000001 1001100
// serato32 value | 00 00 01 4c 00000000000000000000000101001100
// |
// 3-byte plaintext | cc 88 00 110 0110010 0010000 0000000
// serato32 value | 06 32 10 00 00000110001100100001000000000000
//
// See this for details:
// https://github.com/Holzhaus/serato-tags/blob/master/docs/serato_markers_.md#custom-serato32-binary-format
/// Decode value from Serato's 32-bit custom format to 24-bit plaintext.
quint32 serato32toUint24(quint8 w, quint8 x, quint8 y, quint8 z) {
quint8 c = (z & 0x7F) | ((y & 0x01) << 7);
quint8 b = ((y & 0x7F) >> 1) | ((x & 0x03) << 6);
quint8 a = ((x & 0x7F) >> 2) | ((w & 0x07) << 5);
return ((static_cast<quint32>(a) << 16) | (static_cast<quint32>(b) << 8) |
static_cast<quint32>(c));
}
/// Decode value from Serato's 32-bit custom format to 24-bit plaintext.
quint32 serato32toUint24(quint32 value) {
return serato32toUint24((value >> 24) & 0xFF,
(value >> 16) & 0xFF,
(value >> 8) & 0xFF,
value & 0xFF);
}
/// Encode a 24-bit plaintext value into Serato's 32-bit custom format.
quint32 serato32fromUint24(quint8 a, quint8 b, quint8 c) {
quint8 z = c & 0x7F;
quint8 y = ((c >> 7) | (b << 1)) & 0x7F;
quint8 x = ((b >> 6) | (a << 2)) & 0x7F;
quint8 w = (a >> 5);
return (static_cast<quint32>(w) << 24) | (static_cast<quint32>(x) << 16) |
(static_cast<quint32>(y) << 8) | static_cast<quint32>(z);
}
/// Encode a 24-bit plaintext value into Serato's 32-bit custom format. The 8
/// most significant bits of the quint32 will be ignored.
quint32 serato32fromUint24(quint32 value) {
return serato32fromUint24(
(value >> 16) & 0xFF, (value >> 8) & 0xFF, value & 0xFF);
}
} // namespace
namespace mixxx {
QByteArray SeratoMarkersEntry::dump() const {
QByteArray data;
data.resize(kEntrySize);
QDataStream stream(&data, QIODevice::WriteOnly);
stream.setVersion(QDataStream::Qt_5_0);
stream.setByteOrder(QDataStream::BigEndian);
stream << static_cast<quint8>((m_hasStartPosition ? 0x00 : 0x7F))
<< static_cast<quint32>(
(m_hasStartPosition ? serato32fromUint24(m_startPosition)
: 0x7F7F7F7F))
<< static_cast<quint8>((m_hasEndPosition ? 0x00 : 0x7F))
<< static_cast<quint32>(
(m_hasEndPosition ? serato32fromUint24(m_endPosition)
: 0x7F7F7F7F));
stream.writeRawData("\x00\x7F\x7F\x7F\x7F\x7F", 6);
stream << serato32fromUint24(static_cast<quint32>(m_color))
<< static_cast<quint8>(m_type) << static_cast<quint8>(m_isLocked);
return data;
}
SeratoMarkersEntryPointer SeratoMarkersEntry::parse(const QByteArray& data) {
if (data.length() != kEntrySize) {
qWarning() << "Parsing SeratoMarkersEntry failed:"
<< "Length" << data.length() << "!=" << kEntrySize;
return nullptr;
}
quint8 type;
quint8 startPositionStatus;
quint8 endPositionStatus;
quint32 startPositionSerato32;
quint32 endPositionSerato32;
quint32 colorSerato32;
bool isLocked;
char buffer[6];
QDataStream stream(data);
stream.setVersion(QDataStream::Qt_5_0);
stream.setByteOrder(QDataStream::BigEndian);
stream >> startPositionStatus >> startPositionSerato32 >>
endPositionStatus >> endPositionSerato32;
if (stream.readRawData(buffer, sizeof(buffer)) != sizeof(buffer)) {
qWarning() << "Parsing SeratoMarkersEntry failed:"
<< "unable to read bytes 10..16";
return nullptr;
}
stream >> colorSerato32 >> type >> isLocked;
const RgbColor color = RgbColor(serato32toUint24(colorSerato32));
// Parse Start Position
bool hasStartPosition = (startPositionStatus != 0x7F);
quint32 startPosition = 0x7F7F7F7F;
if (!hasStartPosition) {
// Start position not set
if (startPositionSerato32 != 0x7F7F7F7F) {
qWarning() << "Parsing SeratoMarkersEntry failed:"
<< "startPosition != 0x7F7F7F7F";
return nullptr;
}
} else {
startPosition = serato32toUint24(startPositionSerato32);
}
// Parse End Position
bool hasEndPosition = (endPositionStatus != 0x7F);
quint32 endPosition = 0x7F7F7F7F;
if (!hasEndPosition) {
// End position not set
if (endPositionSerato32 != 0x7F7F7F7F) {
qWarning() << "Parsing SeratoMarkersEntry failed:"
<< "endPosition != 0x7F7F7F7F";
return nullptr;
}
} else {
endPosition = serato32toUint24(endPositionSerato32);
}
// Make sure that the unknown (and probably unused) bytes have the expected value
if (strncmp(buffer, "\x00\x7F\x7F\x7F\x7F\x7F", sizeof(buffer)) != 0) {
qWarning() << "Parsing SeratoMarkersEntry failed:"
<< "Unexpected value at offset 10";
return nullptr;
}
if (stream.status() != QDataStream::Status::Ok) {
qWarning() << "Parsing SeratoMarkersEntry failed:"
<< "Stream read failed with status" << stream.status();
return nullptr;
}
if (!stream.atEnd()) {
qWarning() << "Parsing SeratoMarkersEntry failed:"
<< "Unexpected trailing data";
return nullptr;
}
SeratoMarkersEntryPointer pEntry =
SeratoMarkersEntryPointer(new SeratoMarkersEntry(hasStartPosition,
startPosition,
hasEndPosition,
endPosition,
color,
type,
isLocked));
qDebug() << "SeratoMarkersEntry" << *pEntry;
return pEntry;
}
bool SeratoMarkers::parse(
SeratoMarkers* seratoMarkers, const QByteArray& data) {
QDataStream stream(data);
stream.setVersion(QDataStream::Qt_5_0);
stream.setByteOrder(QDataStream::BigEndian);
quint16 version;
stream >> version;
if (version != kVersion) {
qWarning() << "Parsing SeratoMarkers_ failed:"
<< "Unknown Serato Markers_ tag version";
return false;
}
quint32 numEntries;
stream >> numEntries;
if (numEntries != kNumEntries) {
qWarning() << "Parsing SeratoMarkers_ failed:"
<< "Expected" << kNumEntries << "entries but found"
<< numEntries;
return false;
}
char buffer[kEntrySize];
QList<SeratoMarkersEntryPointer> entries;
for (quint32 i = 0; i < numEntries; i++) {
if (stream.readRawData(buffer, sizeof(buffer)) != sizeof(buffer)) {
qWarning() << "Parsing SeratoMarkersEntry failed:"
<< "unable to read entry data";
return false;
}
QByteArray entryData = QByteArray(buffer, kEntrySize);
SeratoMarkersEntryPointer pEntry =
SeratoMarkersEntryPointer(SeratoMarkersEntry::parse(entryData));
if (!pEntry) {
qWarning() << "Parsing SeratoMarkers_ failed:"
<< "Unable to parse entry!";
return false;
}
if (i < kLoopEntryStartIndex &&
pEntry->typeId() != SeratoMarkersEntry::TypeId::Cue) {
qWarn
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