public unsafe bool Save(Project originalProject, FamitoneMusicFile.FamiToneKernel kernel, string filename, int[] songIds, string name, string author, string copyright, MachineType mode)
{
try
{
if (songIds.Length == 0)
{
return(false);
}
Debug.Assert(!originalProject.UsesExpansionAudio || mode == MachineType.NTSC);
var project = originalProject.DeepClone();
project.RemoveAllSongsBut(songIds);
// Header
var header = new NsfHeader();
header.id[0] = (byte)'N';
header.id[1] = (byte)'E';
header.id[2] = (byte)'S';
header.id[3] = (byte)'M';
header.id[4] = (byte)0x1a;
header.version = 1;
header.numSongs = (byte)project.Songs.Count;
header.startingSong = 1;
header.loadAddr = 0x8000;
header.initAddr = NsfInitAddr;
header.playAddr = NsfPlayAddr;
header.playSpeedNTSC = 16639;
header.playSpeedPAL = 19997;
header.palNtscFlags = (byte)mode;
header.extensionFlags = (byte)(project.ExpansionAudio == Project.ExpansionNone ? 0 : 1 << (project.ExpansionAudio - 1));
header.banks[0] = 0;
header.banks[1] = 1;
header.banks[2] = 2;
header.banks[3] = 3;
header.banks[4] = 4;
header.banks[5] = 5;
header.banks[6] = 6;
header.banks[7] = 7;
var nameBytes = Encoding.ASCII.GetBytes(name);
var artistBytes = Encoding.ASCII.GetBytes(author);
var copyrightBytes = Encoding.ASCII.GetBytes(copyright);
Marshal.Copy(nameBytes, 0, new IntPtr(header.song), Math.Min(31, nameBytes.Length));
Marshal.Copy(artistBytes, 0, new IntPtr(header.artist), Math.Min(31, artistBytes.Length));
Marshal.Copy(copyrightBytes, 0, new IntPtr(header.copyright), Math.Min(31, copyrightBytes.Length));
var headerBytes = new byte[sizeof(NsfHeader)];
Marshal.Copy(new IntPtr(&header), headerBytes, 0, headerBytes.Length);
List <byte> nsfBytes = new List <byte>();
string kernelBinary = "nsf";
if (kernel == FamitoneMusicFile.FamiToneKernel.FamiStudio)
{
kernelBinary += "_famistudio";
if (project.UsesExpansionAudio)
{
kernelBinary += $"_{project.ExpansionAudioShortName.ToLower()}";
if (project.ExpansionAudio == Project.ExpansionN163)
{
kernelBinary += $"_{project.ExpansionNumChannels}ch";
}
}
}
else
{
kernelBinary += "_famitone2";
}
switch (mode)
{
case MachineType.NTSC: kernelBinary += "_ntsc"; break;
case MachineType.PAL: kernelBinary += "_pal"; break;
case MachineType.Dual: kernelBinary += "_dual"; break;
}
if (project.UsesFamiStudioTempo)
{
kernelBinary += "_tempo";
}
kernelBinary += ".bin";
// Code/sound engine
var nsfBinStream = typeof(NsfFile).Assembly.GetManifestResourceStream("FamiStudio.Nsf." + kernelBinary);
var nsfBinBuffer = new byte[nsfBinStream.Length - 128]; // Skip header.
nsfBinStream.Seek(128, SeekOrigin.Begin);
nsfBinStream.Read(nsfBinBuffer, 0, nsfBinBuffer.Length);
nsfBytes.AddRange(nsfBinBuffer);
var songTableIdx = nsfBytes.Count;
var songTableSize = NsfGlobalVarsSize + project.Songs.Count * NsfSongTableEntrySize;
nsfBytes.AddRange(new byte[songTableSize]);
var songDataIdx = nsfBytes.Count;
var dpcmBaseAddr = NsfDpcmOffset;
var dpcmPadding = 0;
if (project.UsesSamples)
{
var totalSampleSize = project.GetTotalSampleSize();
// Samples need to be 64-bytes aligned.
nsfBytes.AddRange(new byte[64 - (nsfBytes.Count & 0x3f)]);
// We start putting the samples right after the code, so the first page is not a
// full one. If we have near 16KB of samples, we might go over the 4 page limit.
// In this case, we will introduce padding until the next page.
if (nsfBytes.Count + totalSampleSize > Project.MaxSampleSize)
{
dpcmPadding = NsfPageSize - (nsfBytes.Count & (NsfPageSize - 1));
nsfBytes.AddRange(new byte[dpcmPadding]);
}
var dpcmPageStart = (nsfBytes.Count) / NsfPageSize;
var dpcmPageEnd = (nsfBytes.Count + totalSampleSize - 1) / NsfPageSize;
var dpcmPageCount = dpcmPageEnd - dpcmPageStart + 1;
// Otherwise we will allocate at least a full page for the samples and use the following mapping:
// 0KB - 4KB samples: starts at 0xf000
// 4KB - 8KB samples: starts at 0xe000
// 8KB - 12KB samples: starts at 0xd000
// 12KB - 16KB samples: starts at 0xc000
dpcmBaseAddr += (4 - dpcmPageCount) * NsfPageSize + (nsfBytes.Count & (NsfPageSize - 1));
nsfBytes.AddRange(project.GetPackedSampleData());
nsfBytes[songTableIdx + 0] = (byte)dpcmPageStart; // DPCM_PAGE_START
nsfBytes[songTableIdx + 1] = (byte)dpcmPageCount; // DPCM_PAGE_CNT
}
// Export each song individually, build TOC at the same time.
for (int i = 0; i < project.Songs.Count; i++)
{
var song = project.Songs[i];
var firstPage = nsfBytes.Count < NsfPageSize;
int page = nsfBytes.Count / NsfPageSize + (firstPage ? 1 : 0);
int addr = NsfMemoryStart + (firstPage ? 0 : NsfPageSize) + (nsfBytes.Count & (NsfPageSize - 1));
var songBytes = new FamitoneMusicFile(kernel).GetBytes(project, new int[] { song.Id }, addr, dpcmBaseAddr, mode);
// If we introduced padding for the samples, we can try to squeeze a song in there.
if (songBytes.Length < dpcmPadding)
{
// TODO. We should start writing at [songDataIdx] until we run out of dpcmPadding.
}
var idx = songTableIdx + NsfGlobalVarsSize + i * NsfSongTableEntrySize;
nsfBytes[idx + 0] = (byte)(page);
nsfBytes[idx + 1] = (byte)((addr >> 0) & 0xff);
nsfBytes[idx + 2] = (byte)((addr >> 8) & 0xff);
nsfBytes[idx + 3] = (byte)0;
nsfBytes.AddRange(songBytes);
}
// Finally insert the header, not very efficient, but easy.
nsfBytes.InsertRange(0, headerBytes);
File.WriteAllBytes(filename, nsfBytes.ToArray());
}
catch
{
return(false);
}
return(true);
}
public unsafe static bool Save(Project originalProject, FamitoneMusicFile.FamiToneKernel kernel, string filename, int[] songIds, string name, string author, string copyright)
{
try
{
if (songIds.Length == 0)
{
return(false);
}
var project = originalProject.Clone();
project.RemoveAllSongsBut(songIds);
using (var file = new FileStream(filename, FileMode.Create))
{
// Header
var header = new NsfHeader();
header.id[0] = (byte)'N';
header.id[1] = (byte)'E';
header.id[2] = (byte)'S';
header.id[3] = (byte)'M';
header.id[4] = (byte)0x1a;
header.version = 1;
header.numSongs = (byte)project.Songs.Count;
header.startingSong = 1;
header.loadAddr = 0x8000;
header.initAddr = NsfInitAddr;
header.playAddr = NsfPlayAddr;
header.playSpeedNTSC = 16639;
header.playSpeedPAL = 19997;
header.banks[0] = 0;
header.banks[1] = 1;
header.banks[2] = 2;
header.banks[3] = 3;
header.banks[4] = 4;
header.banks[5] = 5;
header.banks[6] = 6;
header.banks[7] = 7;
var nameBytes = Encoding.ASCII.GetBytes(name);
var artistBytes = Encoding.ASCII.GetBytes(author);
var copyrightBytes = Encoding.ASCII.GetBytes(copyright);
Marshal.Copy(nameBytes, 0, new IntPtr(header.song), Math.Min(31, nameBytes.Length));
Marshal.Copy(artistBytes, 0, new IntPtr(header.artist), Math.Min(31, artistBytes.Length));
Marshal.Copy(copyrightBytes, 0, new IntPtr(header.copyright), Math.Min(31, copyrightBytes.Length));
var headerBytes = new byte[sizeof(NsfHeader)];
Marshal.Copy(new IntPtr(&header), headerBytes, 0, headerBytes.Length);
file.Write(headerBytes, 0, headerBytes.Length);
string kernelBinary = kernel == FamitoneMusicFile.FamiToneKernel.FamiTone2 ? "nsf_ft2.bin" : "nsf_ft2_fs.bin";
// Code/sound engine
var nsfBinStream = typeof(NsfFile).Assembly.GetManifestResourceStream("FamiStudio.Nsf." + kernelBinary);
var nsfBinBuffer = new byte[NsfCodeSize];
nsfBinStream.Read(nsfBinBuffer, 0, nsfBinBuffer.Length);
Debug.Assert(nsfBinStream.Length == NsfCodeSize);
file.Write(nsfBinBuffer, 0, nsfBinBuffer.Length);
var numDpcmPages = 0;
var dpcmBaseAddr = NsfDpcmOffset;
byte[] dpcmBytes = null;
if (project.UsesSamples)
{
var famiToneFile = new FamitoneMusicFile(kernel);
famiToneFile.GetBytes(project, null, 0, NsfDpcmOffset, out _, out dpcmBytes);
numDpcmPages = dpcmBytes != null ? (dpcmBytes.Length + NsfPageSize - 1) / NsfPageSize : 0;
// 0KB - 4KB samples: starts at 0xf000
// 4KB - 8KB samples: starts at 0xe000
// 8KB - 12KB samples: starts at 0xd000
// 12KB - 16KB samples: starts at 0xc000
dpcmBaseAddr += (4 - numDpcmPages) * 0x1000;
}
var songTable = new byte[NsfMaxSongs * 4];
var songBytes = new List <byte>();
// Export each song individually, build TOC at the same time.
for (int i = 0; i < project.Songs.Count && i < NsfMaxSongs; i++)
{
var song = project.Songs[i];
int page = songBytes.Count / NsfPageSize + 1;
int addr = NsfSongAddr + (songBytes.Count & (NsfPageSize - 1));
var famiToneFile = new FamitoneMusicFile(kernel);
famiToneFile.GetBytes(project, new int[] { song.Id }, addr, dpcmBaseAddr, out var currentSongBytes, out _);
songTable[i * 4 + 0] = (byte)(page + numDpcmPages);
songTable[i * 4 + 1] = (byte)((addr >> 0) & 0xff);
songTable[i * 4 + 2] = (byte)((addr >> 8) & 0xff);
songTable[i * 4 + 3] = (byte)(numDpcmPages); // TODO: Same value for all songs... No need to be in song table.
songBytes.AddRange(currentSongBytes);
}
// Song table
file.Write(songTable, 0, songTable.Length);
// DPCM will be on the first 4 pages (1,2,3,4)
if (project.UsesSamples && dpcmBytes != null)
{
if (songBytes.Count > NsfMaxSongSizeDpcm)
{
// TODO: Error message.
return(false);
}
Array.Resize(ref dpcmBytes, numDpcmPages * NsfPageSize);
file.Write(dpcmBytes, 0, dpcmBytes.Length);
}
else
{
if (songBytes.Count > NsfMaxSongSize)
{
// TODO: Error message.
return(false);
}
}
// Song
file.Write(songBytes.ToArray(), 0, songBytes.Count);
file.Flush();
file.Close();
}
}
catch
{
return(false);
}
return(true);
}
