diff options
Diffstat (limited to 'win/CS/HandBrake.Interop/HandBrakeInterop/InteropUtilities.cs')
| -rw-r--r-- | win/CS/HandBrake.Interop/HandBrakeInterop/InteropUtilities.cs | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/win/CS/HandBrake.Interop/HandBrakeInterop/InteropUtilities.cs b/win/CS/HandBrake.Interop/HandBrakeInterop/InteropUtilities.cs new file mode 100644 index 000000000..4102e5eb7 --- /dev/null +++ b/win/CS/HandBrake.Interop/HandBrakeInterop/InteropUtilities.cs @@ -0,0 +1,144 @@ +namespace HandBrake.Interop
+{
+ using System;
+ using System.Collections.Generic;
+ using System.Linq;
+ using System.Text;
+ using System.Runtime.InteropServices;
+
+ /// <summary>
+ /// Helper utilities for native interop.
+ /// </summary>
+ public static class InteropUtilities
+ {
+ /// <summary>
+ /// Reads the given native structure pointer.
+ /// </summary>
+ /// <typeparam name="T">The type to convert the structure to.</typeparam>
+ /// <param name="structPtr">The pointer to the native structure.</param>
+ /// <returns>The converted structure.</returns>
+ public static T ReadStructure<T>(IntPtr structPtr)
+ {
+ return (T)Marshal.PtrToStructure(structPtr, typeof(T));
+ }
+
+ /// <summary>
+ /// Converts the given native HandBrake list to a managed list.
+ /// </summary>
+ /// <typeparam name="T">The type of structure in the list.</typeparam>
+ /// <param name="listPtr">The pointer to the native list.</param>
+ /// <returns>The converted managed list.</returns>
+ public static List<T> ConvertList<T>(IntPtr listPtr)
+ {
+ List<T> returnList = new List<T>();
+ hb_list_s itemList = ReadStructure<hb_list_s>(listPtr);
+
+ for (int i = 0; i < itemList.items_count; i++)
+ {
+ IntPtr itemPtr = Marshal.ReadIntPtr(itemList.items, i * Marshal.SizeOf(typeof(IntPtr)));
+ returnList.Add(ReadStructure<T>(itemPtr));
+ }
+
+ return returnList;
+ }
+
+ /// <summary>
+ /// Creats a new, empty native HandBrake list.
+ /// </summary>
+ /// <returns>The new native list.</returns>
+ public static NativeList CreateNativeList(int capacity)
+ {
+ NativeList returnList = new NativeList();
+ int intSize = Marshal.SizeOf(typeof(IntPtr));
+
+ IntPtr nativeListInternal = Marshal.AllocHGlobal(capacity * intSize);
+ returnList.AllocatedMemory.Add(nativeListInternal);
+
+ hb_list_s nativeListStruct = new hb_list_s();
+ nativeListStruct.items = nativeListInternal;
+ nativeListStruct.items_alloc = capacity;
+ nativeListStruct.items_count = 0;
+
+ IntPtr nativeListStructPtr = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(hb_list_s)));
+ Marshal.StructureToPtr(nativeListStruct, nativeListStructPtr, false);
+
+ returnList.ListPtr = nativeListStructPtr;
+ return returnList;
+ }
+
+ /// <summary>
+ /// Creates a native HandBrake list from the given managed list of pointers.
+ /// </summary>
+ /// <param name="list">The managed list to convert.</param>
+ /// <returns>The converted native list.</returns>
+ public static NativeList CreateIntPtrList(List<IntPtr> list)
+ {
+ NativeList returnList = new NativeList();
+ int intSize = Marshal.SizeOf(typeof(IntPtr));
+
+ IntPtr nativeListInternal = Marshal.AllocHGlobal(list.Count * intSize);
+ returnList.AllocatedMemory.Add(nativeListInternal);
+ for (int i = 0; i < list.Count; i++)
+ {
+ Marshal.WriteIntPtr(nativeListInternal, i * intSize, list[i]);
+ }
+
+ hb_list_s nativeListStruct = new hb_list_s();
+ nativeListStruct.items = nativeListInternal;
+ nativeListStruct.items_alloc = list.Count;
+ nativeListStruct.items_count = list.Count;
+
+ IntPtr nativeListStructPtr = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(hb_list_s)));
+ Marshal.StructureToPtr(nativeListStruct, nativeListStructPtr, false);
+
+ returnList.ListPtr = nativeListStructPtr;
+ return returnList;
+ }
+
+ /// <summary>
+ /// Creates a native HandBrake list from the given managed list of structures.
+ /// </summary>
+ /// <typeparam name="T">The type of structures in the list.</typeparam>
+ /// <param name="list">The managed list to convert.</param>
+ /// <returns>The converted native list.</returns>
+ public static NativeList ConvertListBack<T>(List<T> list)
+ {
+ NativeList returnList = new NativeList();
+ int intSize = Marshal.SizeOf(typeof(IntPtr));
+
+ IntPtr nativeListInternal = Marshal.AllocHGlobal(list.Count * intSize);
+ returnList.AllocatedMemory.Add(nativeListInternal);
+ for (int i = 0; i < list.Count; i++)
+ {
+ IntPtr itemPtr = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(T)));
+ returnList.AllocatedMemory.Add(itemPtr);
+ Marshal.StructureToPtr(list[i], itemPtr, false);
+
+ Marshal.WriteIntPtr(nativeListInternal, i * intSize, itemPtr);
+ }
+
+ hb_list_s nativeListStruct = new hb_list_s();
+ nativeListStruct.items = nativeListInternal;
+ nativeListStruct.items_alloc = list.Count;
+ nativeListStruct.items_count = list.Count;
+
+ IntPtr nativeListStructPtr = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(hb_list_s)));
+ Marshal.StructureToPtr(nativeListStruct, nativeListStructPtr, false);
+
+ returnList.ListPtr = nativeListStructPtr;
+ return returnList;
+ }
+
+ /// <summary>
+ /// Frees all the memory locations in the given list.
+ /// </summary>
+ /// <param name="memoryList">The list of memory locations to free.</param>
+ public static void FreeMemory(List<IntPtr> memoryList)
+ {
+ foreach (IntPtr memoryLocation in memoryList)
+ {
+ Marshal.FreeHGlobal(memoryLocation);
+ }
+ }
+ }
+}
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