// ReSharper restore MemberCanBeProtected.Global
// ReSharper restore UnusedAutoPropertyAccessor.Global
// ReSharper restore MemberCanBePrivate.Global
// ReSharper restore AutoPropertyCanBeMadeGetOnly.Global
// ReSharper disable once UnusedMember.Global
public VgmFile()
{
// Empty file
_stream = new MemoryStream();
Header = new VgmHeader();
Gd3Tag = new Gd3Tag();
}
public static IEnumerable <VgmCommand> Read(VgmHeader header, ISequentialReader reader)
{
var vgmDataOffset = GetVGMDataAbsoluteOffset(header);
reader.SkipToAbsoluteOffset(vgmDataOffset);
return(ReadSequence(reader));
}
public VgmFile(string filename)
{
_stream = new MemoryStream();
Header = new VgmHeader();
Gd3Tag = new Gd3Tag();
LoadFromFile(filename);
}
private static void CalculateCommandsStatistics(string fileName, VgmHeader header, IEnumerable <VgmCommand> commands)
{
var stat = commands.GroupBy(x => x.Code)
.Select(x => new { Count = x.Count(), Code = x.Key })
.OrderBy(x => x.Code)
.ToList();
File.WriteAllLines(fileName + ".txt", stat.Select(x => $"0x{x.Code:X2}: {x.Count}"));
}
private static uint GetVGMDataAbsoluteOffset(VgmHeader header)
{
const uint vgmDataOffsetPriorToV150 = 0x40;
if (header.V150.VGMDataOffset == 0)
{
return(vgmDataOffsetPriorToV150);
}
else
{
var relativeOffset = header.V150.VGMDataOffset;
return(relativeOffset + V150HeaderPart.VGMDataOffsetOffset);
}
}
public static YM2612Settings GetYM2612Settings(this VgmHeader header)
{
if (GetDevicePresence(header, DeviceType.YM2612) == DevicePresence.Absent)
{
throw new InvalidOperationException();
}
var clock = header.Common.Version <= FormatVersion.V101 ?
header.V100.YM2413Clock : header.V110.YM2612Clock;
return(new YM2612Settings
{
Clock = (int)clock
});
}
public static VgmHeader Read(ISequentialReader reader)
{
var header = new VgmHeader();
var unused = new V151HeaderPart();
ReadCommon(reader, ref header.Common);
if (header.Common.VgmIdentification != CommonHeaderPart.VgmIdentificationValue)
{
throw new VgmException("Vgm magic number does not found");
}
var version = header.Common.Version;
if (version != FormatVersion.V100 &&
version != FormatVersion.V101 &&
version != FormatVersion.V110 &&
version != FormatVersion.V150)
{
throw new VgmException("Unsupported version");
}
Read100(reader, ref header.V100);
if (version == FormatVersion.V100)
{
return(header);
}
Read101(reader, ref header.V101);
if (version == FormatVersion.V101)
{
return(header);
}
Read110Part1(reader, ref header.V110);
Read151Part1(reader, ref unused);
Read110Part2(reader, ref header.V110);
if (version == FormatVersion.V110)
{
return(header);
}
Read150(reader, ref header.V150);
return(header);
}
private static void RenderVgmToWav(string fileName, VgmHeader header, IEnumerable <VgmCommand> commands)
{
var wave = CreateWave(header.GetSamplesCount());
var sampleNumber = 0;
var amplitude = 15000f;
var values = Renderer.Render(commands);
foreach (var value in values)
{
wave.Samples[sampleNumber++] = (short)(amplitude * value);
}
using (var outputStream = new FileStream(fileName + ".wav", FileMode.Create))
{
using (var writer = new BinaryWriter(outputStream))
{
WavWriter.Write(wave, writer);
}
}
}
public static DevicePresence GetDevicePresence(this VgmHeader header, DeviceType deviceType)
{
switch (deviceType)
{
case DeviceType.SN76489:
return(header.V100.SN76489Clock == 0 ? DevicePresence.Absent : DevicePresence.Present);
case DeviceType.YM2612:
if (header.Common.Version <= FormatVersion.V101)
{
return(header.V100.YM2413Clock == 0 ? DevicePresence.Absent : DevicePresence.ProbablyPresent);
}
else
{
return(header.V110.YM2612Clock == 0 ? DevicePresence.Absent : DevicePresence.Present);
}
default:
throw new ArgumentOutOfRangeException(nameof(deviceType), deviceType, null);
}
}
public static SN76489Settings GetSN76489Settings(this VgmHeader header)
{
if (GetDevicePresence(header, DeviceType.SN76489) == DevicePresence.Absent)
{
throw new InvalidOperationException();
}
var clock = header.V100.SN76489Clock;
var feedbackMask = header.Common.Version <= FormatVersion.V101
? 0x0009
: header.V110.SN76489Feedback;
var shiftRegisterWidth = header.Common.Version <= FormatVersion.V101
? 16
: header.V110.SN76489ShiftRegisterWidth;
return(new SN76489Settings
{
Clock = (int)clock,
FeedbackMask = feedbackMask,
ShiftRegisterWidth = shiftRegisterWidth
});
}
public static long GetSamplesCount(this VgmHeader header) => header.V100.TotalNumberOfSamples;
public static FormatVersion GetFormatVersion(this VgmHeader header) => header.Common.Version;
