Formats::Chiptune::Container::Ptr Parse(const Binary::Container& data, Builder& target)
{
if (!FastCheck(data))
{
return Formats::Chiptune::Container::Ptr();
}
try
{
Binary::InputStream stream(data);
stream.ReadField<SignatureType>();
target.SetTitle(DecodeString(stream.ReadCString(MAX_STRING_SIZE)));
target.SetAuthor(DecodeString(stream.ReadCString(MAX_STRING_SIZE)));
target.SetComment(DecodeString(stream.ReadCString(MAX_COMMENT_SIZE)));
const std::size_t fixedOffset = stream.GetPosition();
std::size_t totalFrames = 0;
for (;;)
{
const uint8_t val = stream.ReadField<uint8_t>();
if (val == FINISH)
{
break;
}
switch (val)
{
case BEGIN_FRAME:
++totalFrames;
target.BeginFrames(1);
break;
case SKIP_FRAMES:
{
const uint_t frames = 3 + stream.ReadField<uint8_t>();
totalFrames += frames;
target.BeginFrames(frames);
}
break;
case SELECT_SECOND_CHIP:
target.SelectChip(1);
break;
case SELECT_FIRST_CHIP:
target.SelectChip(0);
break;
case LOOP_MARKER:
target.SetLoop();
break;
default:
target.SetRegister(val, stream.ReadField<uint8_t>());
break;
}
}
Require(totalFrames >= MIN_FRAMES);
const std::size_t usedSize = stream.GetPosition();
const auto subData = stream.GetReadData();
return CreateCalculatingCrcContainer(subData, fixedOffset, usedSize - fixedOffset);
}
catch (const std::exception&)
{
return Formats::Chiptune::Container::Ptr();
}
}
Formats::Chiptune::Container::Ptr Parse(const Binary::Container& rawData, Builder& target)
{
if (!FastCheck(rawData))
{
return Formats::Chiptune::Container::Ptr();
}
const Binary::TypedContainer& data(rawData);
const Header& header = *data.GetField<Header>(0);
//workaround for some emulators
const std::size_t offset = (header.Version == INT_BEGIN) ? offsetof(Header, Version) : sizeof(header);
std::size_t restSize = rawData.Size() - offset;
const uint8_t* bdata = data.GetField<uint8_t>(offset);
//detect as much chunks as possible, in despite of real format issues
while (restSize)
{
const uint_t reg = *bdata;
++bdata;
--restSize;
if (INT_BEGIN == reg)
{
target.AddChunks(1);
}
else if (INT_SKIP == reg)
{
if (restSize < 1)
{
++restSize;//put byte back
break;
}
target.AddChunks(4 * *bdata);
++bdata;
--restSize;
}
else if (MUS_END == reg)
{
break;
}
else if (reg <= 15) //register
{
if (restSize < 1)
{
++restSize;//put byte back
break;
}
target.SetRegister(reg, *bdata);
++bdata;
--restSize;
}
else
{
++restSize;//put byte back
break;
}
}
const std::size_t usedSize = rawData.Size() - restSize;
const Binary::Container::Ptr subData = rawData.GetSubcontainer(0, usedSize);
return CreateCalculatingCrcContainer(subData, offset, usedSize - offset);
}
Formats::Chiptune::Container::Ptr Decode(const Binary::Container& rawData) const override
{
if (!Format->Match(rawData))
{
return Formats::Chiptune::Container::Ptr();
}
const std::size_t realSize = std::min(rawData.Size(), MAX_SIZE);
const Binary::Container::Ptr data = rawData.GetSubcontainer(0, realSize);
return CreateCalculatingCrcContainer(data, 0, realSize);
}
virtual Formats::Chiptune::Container::Ptr Parse(const Binary::Container& rawData, Builder& target) const
{
const ModuleTraits& traits = Format->GetTraits(rawData);
if (!traits.Matched())
{
return Formats::Chiptune::Container::Ptr();
}
target.SetFirstSubmoduleLocation(0, traits.GetFirstModuleSize());
target.SetSecondSubmoduleLocation(traits.GetFirstModuleSize(), traits.GetSecondModuleSize());
const std::size_t usedSize = traits.GetTotalSize();
const Binary::Container::Ptr subData = rawData.GetSubcontainer(0, usedSize);
//use whole container as a fixed data
return CreateCalculatingCrcContainer(subData, 0, usedSize);
}
Formats::Chiptune::Container::Ptr Parse(const Binary::Container& data, Builder& target)
{
if (data.Size() < sizeof(RawHeader))
{
return Formats::Chiptune::Container::Ptr();
}
try
{
Format format(data);
format.ParseMainPart(target);
format.ParseExtendedPart(target);
const Binary::Container::Ptr subData = format.GetUsedData();
const std::size_t fixedStart = offsetof(RawHeader, RAM);
const std::size_t fixedEnd = sizeof(RawHeader);
return CreateCalculatingCrcContainer(subData, fixedStart, fixedEnd - fixedStart);
}
catch (const std::exception&)
{
return Formats::Chiptune::Container::Ptr();
}
}
Formats::Chiptune::Container::Ptr Parse(const Binary::Container& rawData, Builder& target)
{
const Binary::TypedContainer data = CreateContainer(rawData);
if (!FastCheck(data))
{
return Formats::Chiptune::Container::Ptr();
}
try
{
const Format format(data);
StatisticCollectingBuilder statistic(target);
format.ParseCommonProperties(statistic);
format.ParsePositions(statistic);
Indices usedPatterns = statistic.GetUsedPatterns();
const uint_t mode = statistic.GetMode();
if (mode != SINGLE_AY_MODE
&& !AddTSPatterns(mode, usedPatterns))
{
target.SetMode(SINGLE_AY_MODE);
}
format.ParsePatterns(usedPatterns, statistic);
const Indices& usedSamples = statistic.GetUsedSamples();
format.ParseSamples(usedSamples, target);
const Indices& usedOrnaments = statistic.GetUsedOrnaments();
format.ParseOrnaments(usedOrnaments, target);
Require(format.GetSize() >= MIN_SIZE);
const Binary::Container::Ptr subData = rawData.GetSubcontainer(0, format.GetSize());
const RangeChecker::Range fixedRange = format.GetFixedArea();
return CreateCalculatingCrcContainer(subData, fixedRange.first, fixedRange.second - fixedRange.first);
}
catch (const std::exception&)
{
Dbg("Failed to create");
return Formats::Chiptune::Container::Ptr();
}
}
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();
}
}
