/// <summary>
/// Attempts to load a native library.
/// </summary>
/// <param name="libraryName">Name of the library.</param>
/// <returns>
/// A handle to the library when found; otherwise, <see cref="IntPtr.Zero" />.
/// </returns>
/// <remarks>
/// This function may return a null handle. If it does, individual functions loaded from it will throw a
/// DllNotFoundException,
/// but not until an attempt is made to actually use the function (rather than load it). This matches how PInvokes
/// behave.
/// </remarks>
public static IntPtr LoadNativeLibrary(string libraryName)
{
switch (GetPlatformId())
{
case PlatformID.MacOSX:
return(MacNativeMethods.dlopen(libraryName, MacNativeMethods.RTLD_NOW));
case PlatformID.Unix:
return(LinuxNativeMethods.dlopen(libraryName, LinuxNativeMethods.RTLD_NOW));
case PlatformID.Win32NT:
case PlatformID.Win32S:
case PlatformID.Win32Windows:
return(WindowsNativeMethods.LoadLibrary(libraryName));
default:
throw new PlatformNotSupportedException();
}
}
/// <summary>
/// Attempts to load a native library.
/// </summary>
/// <param name="path">Path of the library.</param>
/// <param name="libraryName">Name of the library.</param>
/// <param name="version">Version of the library.</param>
/// <returns>
/// A handle to the library when found; otherwise, <see cref="IntPtr.Zero" />.
/// </returns>
/// <remarks>
/// This function may return a null handle. If it does, individual functions loaded from it will throw a
/// DllNotFoundException,
/// but not until an attempt is made to actually use the function (rather than load it). This matches how PInvokes
/// behave.
/// </remarks>
public static IntPtr LoadNativeLibrary(string libraryName)
{
#if NET45
return(WindowsNativeMethods.LoadLibrary(libraryName));
#else
IntPtr lib = IntPtr.Zero;
switch (ffmpeg.GetPlatform())
{
case FFMpegPlatform.macOS:
lib = MacNativeMethods.dlopen(libraryName, MacNativeMethods.RTLD_NOW);
break;
case FFMpegPlatform.windows:
lib = WindowsNativeMethods.LoadLibrary(libraryName);
break;
case FFMpegPlatform.unix:
//TODO: Should I add lib* on Unix too?
lib = LinuxNativeMethods.dlopen(libraryName, LinuxNativeMethods.RTLD_NOW);
break;
case FFMpegPlatform.iOS:
lib = iOSNativeMethods.dlopen("lib" + libraryName, MacNativeMethods.RTLD_NOW);
break;
default:
throw new PlatformNotSupportedException();
}
/*
* if (lib == IntPtr.Zero) {
* if(ffmpeg.GetPlatform() == FFMpegPlatform.windows){
* var winErr = Marshal.GetLastWin32Error();
* throw new Exception("Unable to load library " + libraryName + " error code " + winErr);
* }
* throw new Exception("Unable to load library " + libraryName);
* }
*/
return(lib);
#endif
}
/// <summary>
/// Attempts to load a native library.
/// </summary>
/// <param name="path">Path of the library.</param>
/// <param name="libraryName">Name of the library.</param>
/// <param name="version">Version of the library.</param>
/// <returns>
/// A handle to the library when found; otherwise, <see cref="IntPtr.Zero" />.
/// </returns>
/// <remarks>
/// This function may return a null handle. If it does, individual functions loaded from it will throw a
/// DllNotFoundException,
/// but not until an attempt is made to actually use the function (rather than load it). This matches how PInvokes
/// behave.
/// </remarks>
public static IntPtr LoadNativeLibrary(string libraryName)
{
#if NET4
return(WindowsNativeMethods.LoadLibrary(libraryName));
#else
if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
{
return(WindowsNativeMethods.LoadLibrary(libraryName));
}
if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
{
return(LinuxNativeMethods.dlopen(libraryName, LinuxNativeMethods.RTLD_NOW));
}
if (RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
{
return(MacNativeMethods.dlopen(libraryName, MacNativeMethods.RTLD_NOW));
}
throw new PlatformNotSupportedException();
#endif
}