/// <summary>
/// Retrieves information about the supplied JPEG.
/// </summary>
/// <param name="libHandle">The NvJPEG library handle.</param>
/// <param name="imageBytes">The JPEG image bytes.</param>
/// <param name="numComponents">Filled in with the number of components.</param>
/// <param name="subsampling">Filled in with the subsampling.</param>
/// <param name="widths">Filled in with the widths.</param>
/// <param name="heights">Filled in with the heights.</param>
/// <returns>The error code.</returns>
public unsafe NvJpegStatus GetImageInfo(
IntPtr libHandle,
ReadOnlySpan <byte> imageBytes,
out int numComponents,
out NvJpegChromaSubsampling subsampling,
out int[] widths,
out int[] heights)
{
widths = new int[NvJpegConstants.NVJPEG_MAX_COMPONENT];
heights = new int[NvJpegConstants.NVJPEG_MAX_COMPONENT];
fixed(byte *imageBytesPtr = imageBytes)
fixed(int *widthsPtr = widths)
fixed(int *heightsPtr = heights)
{
return(GetImageInfo(
libHandle,
imageBytesPtr,
(ulong)imageBytes.Length,
out numComponents,
out subsampling,
widthsPtr,
heightsPtr));
}
}
/// <inheritdoc cref="NvJpegAPI.GetImageInfo(
/// IntPtr,
/// ReadOnlySpan{byte},
/// out int,
/// out NvJpegChromaSubsampling,
/// out int[],
/// out int[])"/>
public unsafe NvJpegStatus GetImageInfo(
ReadOnlySpan <byte> imageBytes,
out int numComponents,
out NvJpegChromaSubsampling subsampling,
out int[] widths,
out int[] heights) =>
API.GetImageInfo(
LibHandle,
imageBytes,
out numComponents,
out subsampling,
out widths,
out heights);
