bool FastCheck(const Binary::Container& rawData)
{
if (rawData.Size() < MIN_SIZE)
{
return false;
}
const SignatureType& sign = *static_cast<const SignatureType*>(rawData.Start());
return sign == SIGNATURE;
}
bool FastCheck(const Binary::Container& rawData)
{
if (rawData.Size() <= sizeof(Header))
{
return false;
}
const Header* const header = static_cast<const Header*>(rawData.Start());
return 0 == std::memcmp(header->Sign, SIGNATURE, sizeof(SIGNATURE)) &&
MARKER == header->Marker;
}
virtual Container::Ptr Decode(const Binary::Container& rawData) const
{
const void* const data = rawData.Start();
const std::size_t availSize = rawData.Size();
const FullDiskImage::Container container(data, availSize);
if (!container.FastCheck())
{
return Container::Ptr();
}
FullDiskImage::Decoder decoder(container);
return CreatePackedContainer(decoder.GetResult(), decoder.GetUsedSize());
}
virtual Container::Ptr Decode(const Binary::Container& rawData) const
{
if (!Depacker->Match(rawData))
{
return Container::Ptr();
}
const MSPack::Container container(rawData.Start(), rawData.Size());
if (!container.FastCheck())
{
return Container::Ptr();
}
MSPack::DataDecoder decoder(container);
return CreatePackedContainer(decoder.GetResult(), container.GetUsedSize());
}
bool FastCheck(const Binary::Container& rawData)
{
if (rawData.Size() <= sizeof(Header))
{
return false;
}
const Header& header = *static_cast<const Header*>(rawData.Start());
std::size_t minDataStart = sizeof(header);
for (uint_t reg = 0; reg != header.Buffers.size(); ++reg)
{
const BufferDescription& buf = header.Buffers[reg];
if (buf.SizeHi != 1 && buf.SizeHi != 4)
{
return false;
}
const std::size_t dataOffset = buf.GetAbsoluteOffset(reg);
if (dataOffset < minDataStart)
{
return false;
}
minDataStart = dataOffset;
}
return true;
}
Formats::Chiptune::Container::Ptr Parse(const Binary::Container& rawData, Builder& target)
{
if (!FastCheck(rawData))
{
return Formats::Chiptune::Container::Ptr();
}
try
{
const std::size_t size = rawData.Size();
const uint8_t* const begin = static_cast<const uint8_t*>(rawData.Start());
const uint8_t* const end = begin + size;
const Header& header = *safe_ptr_cast<const Header*>(begin);
const uint_t frames = fromLE(header.Duration);
target.SetFrames(frames);
std::size_t usedBegin = size;
std::size_t usedEnd = 0;
for (uint_t reg = 0; reg != header.Buffers.size(); ++reg)
{
target.StartChannel(reg);
const BufferDescription& buf = header.Buffers[reg];
const std::size_t offset = buf.GetAbsoluteOffset(reg);
Require(offset < size);
Stream stream(buf.SizeHi, begin + offset, end);
ParseBuffer(frames, stream, target);
usedBegin = std::min(usedBegin, offset);
usedEnd = std::max<std::size_t>(usedEnd, stream.GetCursor() - begin);
}
const Binary::Container::Ptr subData = rawData.GetSubcontainer(0, usedEnd);
return CreateCalculatingCrcContainer(subData, usedBegin, usedEnd - usedBegin);
}
catch (const std::exception&)
{
return Formats::Chiptune::Container::Ptr();
}
}
Module::Holder::Ptr CreateModule(const Parameters::Accessor& params, const Binary::Container& rawData, Parameters::Container::Ptr properties) const override
{
try
{
const TunePtr tune = std::make_shared<SidTune>(static_cast<const uint_least8_t*>(rawData.Start()),
static_cast<uint_least32_t>(rawData.Size()));
CheckSidplayError(tune->getStatus());
const unsigned songIdx = tune->selectSong(0);
const SidTuneInfo& tuneInfo = *tune->getInfo();
if (tuneInfo.songs() > 1)
{
Require(HasSidContainer(*properties));
}
PropertiesHelper props(*properties);
switch (tuneInfo.numberOfInfoStrings())
{
default:
case 3:
//copyright/publisher really
props.SetComment(FromStdString(tuneInfo.infoString(2)));
case 2:
props.SetAuthor(FromStdString(tuneInfo.infoString(1)));
case 1:
props.SetTitle(FromStdString(tuneInfo.infoString(0)));
case 0:
break;
}
const Binary::Container::Ptr data = rawData.GetSubcontainer(0, tuneInfo.dataFileLen());
const Formats::Chiptune::Container::Ptr source = Formats::Chiptune::CreateCalculatingCrcContainer(data, 0, data->Size());
props.SetSource(*source);
const uint_t fps = tuneInfo.songSpeed() == SidTuneInfo::SPEED_CIA_1A || tuneInfo.clockSpeed() == SidTuneInfo::CLOCK_NTSC ? 60 : 50;
props.SetFramesFrequency(fps);
const Information::Ptr info = MakePtr<Information>(GetDuration(params), tune, fps, songIdx);
return MakePtr<Holder>(tune, info, properties);
}
catch (const std::exception&)
{
return Holder::Ptr();
}
}
