public Canvas(int width, int height, int keyHeight, int fps, string videoName, int crf = 13, uint lineColor = 0xFF000080, string ffArg = "")
{
Width = width;
Height = height;
keyh = keyHeight;
this.fps = fps;
string ffarg = string.Concat("ffmpeg -y -hide_banner -f rawvideo -pix_fmt rgba -s ", width, "x", height,
" -r ", fps, " -i - -pix_fmt yuv420p -preset ultrafast -crf ", crf, " \"", videoName + "\" ", ffArg);
ffpipe = CStream.OpenPipe(ffarg, "wb");
frame = (uint *)UnsafeMemory.Allocate((ulong)width * (ulong)height * 4);
UnsafeMemory.Set(frame, 0, (ulong)width * (ulong)height * 4);
data = (uint **)UnsafeMemory.Allocate((ulong)height * (ulong)sizeof(void *));
for (uint i = 0; i < height; ++i)
{
data[i] = frame + (height - 1 - i) * width;
}
for (int i = 0; i != 128; ++i)
{
keyx[i] = (i / 12 * 126 + genkeyx[i % 12]) * Width / 1350;
}
for (int i = 0; i != 127; ++i)
{
keyw[i] = (i % 12) switch
{
1 or 3 or 6 or 8 or 10 => width * 9 / 1350,
4 or 11 => keyx[i + 1] - keyx[i],
_ => keyx[i + 2] - keyx[i],
}
}
;
keyw[127] = width - keyx[127];
linc = lineColor;
for (int i = 0; i != 128; ++i)
{
keycolor[i] = (i % 12) switch
{
1 or 3 or 6 or 8 or 10 => 0xFF000000,
_ => 0xFFFFFFFF,
}
}
;
keyColors = (uint *)UnsafeMemory.Allocate(512);
fixed(uint *p = keycolor) UnsafeMemory.Copy(keyColors, p, 512);
emptyFrame = (uint *)UnsafeMemory.Allocate((ulong)width * (ulong)height * 4);
for (int i = 0; i < Height; ++i)
{
for (int j = 0; j < Width; ++j)
{
data[i][j] = 0xFF000000;
}
}
UnsafeMemory.Copy(emptyFrame, frame, (ulong)width * (ulong)height * 4);
//renderPush = Task.Run(() =>
//{
// while (!destoryed)
// {
// if (!FrameList.IsEmpty)
// {
// FrameList.TryDequeue(out IntPtr f);
// void* currFrame = f.ToPointer();
// ffpipe.Write(currFrame, (ulong)Width * (ulong)Height, 4);
// UnsafeMemory.Free(currFrame);
// }
// }
//});
}