public AudioFile(string path)
{
// Ensure file
if (!File.Exists(path))
{
throw new FileNotFoundException($"The audio file '{path}' does not exist or is an invalid path");
}
Path = path;
// Try to load the file
NativeContent.AudioError error;
(_handle, error) = NativeContent.AudioOpenFile(path);
if (_handle == IntPtr.Zero || error != NativeContent.AudioError.NoError)
{
throw new ContentLoadException(path, $"audio file loading failed with {error}");
}
// Get the file info
NativeContent.AudioGetInfo(_handle, out var frames, out var rate, out var channels);
if (rate < 8_000 || rate > 48_000)
{
throw new ContentLoadException(path,
$"audio files must have sample rates in [8000, 48000] (actual {rate})");
}
if (channels == 0 || channels > 2)
{
throw new ContentLoadException(path,
$"audio files must have either 1 (mono) or 2 (stereo) channels (actual {channels})");
}
FrameCount = frames;
SampleRate = rate;
Stereo = (channels == 2);
AudioType = NativeContent.AudioGetType(_handle);
}
public ImageFile(string path)
{
// Ensure file
if (!File.Exists(path))
{
throw new FileNotFoundException($"The image file '{path}' does not exist or is an invalid path");
}
Path = path;
// Try to load the file
NativeContent.ImageError error;
(_handle, error) = NativeContent.ImageOpenFile(path);
if (_handle == IntPtr.Zero || error != NativeContent.ImageError.NoError)
{
throw new ContentLoadException(path, $"image file loading failed with {error}");
}
// Get the file info
(Width, Height) = NativeContent.ImageGetSize(_handle);
Channels = NativeContent.ImageGetChannels(_handle);
Type = NativeContent.ImageGetType(_handle);
if (Channels == NativeContent.ImageChannels.Unknown)
{
throw new ContentLoadException(path, "image file has unsupported color channel count");
}
}
private void dispose(bool disposing)
{
if (_handle != IntPtr.Zero)
{
NativeContent.AudioCloseFile(_handle);
}
_handle = IntPtr.Zero;
}
// Loads the texture as RGBA data
public ReadOnlySpan <Color> LoadDataRGBA()
{
var data = NativeContent.ImageLoadData(_handle, NativeContent.ImageChannels.RGBA);
if ((data == null) || (Error != NativeContent.ImageError.NoError))
{
throw new ContentLoadException(Path, $"image file data read failed with {Error}");
}
return(new(data, (int)(Width * Height)));
}
// Read frames - throws an exception on error, instead of returning 0
public ulong ReadFrames(ReadOnlySpan <short> buffer)
{
if (EOF)
{
return(0);
}
ulong fCount = (uint)buffer.Length / (Stereo ? 2u : 1u);
ulong read = NativeContent.AudioReadFrames(_handle, fCount, buffer);
if (read == 0)
{
throw new ContentLoadException(Path, $"audio file data read error ({Error})");
}
return(read);
}
