304 lines
18 KiB
C#
304 lines
18 KiB
C#
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// Copyright (c) 2010-2011 SharpDX - Alexandre Mutel
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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using System;
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using System.Globalization;
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using System.Runtime.InteropServices;
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using System.Reflection;
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namespace SharpDX.MediaFoundation
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{
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public partial class MediaAttributes
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{
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/// <summary>
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/// Initializes a new instance of the <see cref="MediaAttributes"/> class.
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/// </summary>
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/// <param name="initialSizeInBytes">The initial number of elements allocated for the attribute store. The attribute store grows as needed. Default is 0</param>
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/// <remarks>
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/// <p>Attributes are used throughout Microsoft Media Foundation to configure objects, describe media formats, query object properties, and other purposes. For more information, see Attributes in Media Foundation.</p><p>For a complete list of all the defined attribute GUIDs in Media Foundation, see Media Foundation Attributes.</p>
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/// </remarks>
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/// <msdn-id>ms701878</msdn-id>
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/// <unmanaged>HRESULT MFCreateAttributes([Out] IMFAttributes** ppMFAttributes,[In] unsigned int cInitialSize)</unmanaged>
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/// <unmanaged-short>MFCreateAttributes</unmanaged-short>
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public MediaAttributes(int initialSizeInBytes = 0)
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: base(IntPtr.Zero)
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{
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MediaFactory.CreateAttributes(this, initialSizeInBytes);
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}
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/// <summary>
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/// Gets an item value
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/// </summary>
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/// <param name="guidKey">GUID of the key.</param>
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/// <returns>The value associated to this key.</returns>
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/// <msdn-id>ms704598</msdn-id>
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/// <unmanaged>HRESULT IMFAttributes::GetItem([In] const GUID& guidKey,[In] void* pValue)</unmanaged>
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/// <unmanaged-short>IMFAttributes::GetItem</unmanaged-short>
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public object Get(System.Guid guidKey)
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{
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var itemType = GetItemType(guidKey);
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switch (itemType)
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{
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case AttributeType.UInt32:
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return Get<int>(guidKey);
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case AttributeType.UInt64:
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return Get<long>(guidKey);
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case AttributeType.Double:
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return Get<double>(guidKey);
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case AttributeType.Guid:
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return Get<Guid>(guidKey);
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case AttributeType.Blob:
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return Get<byte[]>(guidKey);
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case AttributeType.String:
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return Get<string>(guidKey);
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case AttributeType.IUnknown:
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return Get<ComObject>(guidKey);
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}
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throw new ArgumentException("The type of the value is not supported");
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}
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/// <summary>
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/// <p><strong>Applies to: </strong>desktop apps | Metro style apps</p><p> </p><p>Retrieves an attribute at the specified index.</p>
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/// </summary>
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/// <param name="index"><dd> <p>Index of the attribute to retrieve. To get the number of attributes, call <strong><see cref="SharpDX.MediaFoundation.MediaAttributes.GetCount"/></strong>.</p> </dd></param>
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/// <param name="guidKey"><dd> <p>Receives the <see cref="System.Guid"/> that identifies this attribute.</p> </dd></param>
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/// <returns>The value associated to this index</returns>
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/// <remarks>
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/// <p>To enumerate all of an object's attributes in a thread-safe way, do the following:</p><ol> <li> <p>Call <strong><see cref="SharpDX.MediaFoundation.MediaAttributes.LockStore"/></strong> to prevent another thread from adding or deleting attributes.</p> </li> <li> <p>Call <strong><see cref="SharpDX.MediaFoundation.MediaAttributes.GetCount"/></strong> to find the number of attributes.</p> </li> <li> <p>Call <strong>GetItemByIndex</strong> to get each attribute by index.</p> </li> <li> <p>Call <strong><see cref="SharpDX.MediaFoundation.MediaAttributes.UnlockStore"/></strong> to unlock the attribute store.</p> </li> </ol><p>This interface is available on the following platforms if the Windows Media Format 11 SDK redistributable components are installed:</p><ul> <li>Windows?XP with Service Pack?2 (SP2) and later.</li> <li>Windows?XP Media Center Edition?2005 with KB900325 (Windows?XP Media Center Edition?2005) and KB925766 (October 2006 Update Rollup for Windows?XP Media Center Edition) installed.</li> </ul>
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/// </remarks>
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/// <msdn-id>bb970331</msdn-id>
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/// <unmanaged>HRESULT IMFAttributes::GetItemByIndex([In] unsigned int unIndex,[Out] GUID* pguidKey,[InOut, Optional] PROPVARIANT* pValue)</unmanaged>
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/// <unmanaged-short>IMFAttributes::GetItemByIndex</unmanaged-short>
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public object GetByIndex(int index, out System.Guid guidKey)
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{
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GetItemByIndex(index, out guidKey, IntPtr.Zero);
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return Get(guidKey);
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}
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/// <summary>
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/// Gets an item value
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/// </summary>
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/// <param name="guidKey">GUID of the key.</param>
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/// <returns>The value associated to this key.</returns>
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/// <msdn-id>ms704598</msdn-id>
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/// <unmanaged>HRESULT IMFAttributes::GetItem([In] const GUID& guidKey,[In] void* pValue)</unmanaged>
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/// <unmanaged-short>IMFAttributes::GetItem</unmanaged-short>
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public unsafe T Get<T>(System.Guid guidKey)
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{
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// Perform conversions to supported types
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// int
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// long
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// string
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// byte[]
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// double
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// ComObject
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// Guid
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if (typeof(T) == typeof(int) || typeof(T) == typeof(bool) || typeof(T) == typeof(byte) || typeof(T) == typeof(uint) || typeof(T) == typeof(short) || typeof(T) == typeof(ushort) || typeof(T) == typeof(byte) || typeof(T) == typeof(sbyte))
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{
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return (T)Convert.ChangeType(GetInt(guidKey), typeof(T));
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}
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if (typeof(T).GetTypeInfo().IsEnum )
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{
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return (T)Enum.ToObject(typeof(T), GetInt(guidKey));
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}
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if (typeof(T) == typeof(IntPtr))
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{
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return (T)(object)new IntPtr(GetLong(guidKey));
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}
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if (typeof(T) == typeof(long) || typeof(T) == typeof(ulong))
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{
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return (T)Convert.ChangeType(GetLong(guidKey), typeof(T));
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}
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if (typeof(T) == typeof(System.Guid))
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{
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return (T)(object)GetGUID(guidKey);
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}
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if (typeof(T) == typeof(string))
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{
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int length = GetStringLength(guidKey);
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char* wstr = stackalloc char[length + 1];
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GetString(guidKey, new IntPtr(wstr), length + 1, IntPtr.Zero);
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return (T)(object)Marshal.PtrToStringUni(new IntPtr(wstr));
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}
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if (typeof(T) == typeof(double) || typeof(T) == typeof(float))
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{
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return (T)Convert.ChangeType(GetDouble(guidKey), typeof(T));
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}
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if (typeof(T) == typeof(byte[]))
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{
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int length = GetBlobSize(guidKey);
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var buffer = new byte[length];
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fixed (void *pBuffer = buffer)
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GetBlob(guidKey, (IntPtr)pBuffer, buffer.Length, IntPtr.Zero);
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return (T)(object)buffer;
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}
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if (typeof(T).GetTypeInfo().IsValueType)
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{
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int length = GetBlobSize(guidKey);
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if ( length != SharpDX.Interop.SizeOf<T>())
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{
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throw new ArgumentException("Size of the structure doesn't match the size of stored value");
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}
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var value = default(T);
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GetBlob(guidKey, (IntPtr)Interop.Fixed(ref value), SharpDX.Interop.SizeOf<T>(), IntPtr.Zero);
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return value;
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}
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if (typeof(T) == typeof(ComObject))
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{
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IntPtr ptr;
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GetUnknown(guidKey, Utilities.GetGuidFromType(typeof(IUnknown)), out ptr);
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return (T)(object)new ComObject(ptr);
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}
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if (typeof(T).GetTypeInfo().IsSubclassOf(typeof(ComObject)))
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{
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IntPtr ptr;
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GetUnknown(guidKey, Utilities.GetGuidFromType(typeof(T)), out ptr);
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return AsUnsafe<T>(ptr);
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}
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throw new ArgumentException("The type of the value is not supported");
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}
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/// <summary>
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/// Gets an item value
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/// </summary>
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/// <param name="guidKey">GUID of the key.</param>
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/// <returns>The value associated to this key.</returns>
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/// <msdn-id>ms704598</msdn-id>
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/// <unmanaged>HRESULT IMFAttributes::GetItem([In] const GUID& guidKey,[In] void* pValue)</unmanaged>
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/// <unmanaged-short>IMFAttributes::GetItem</unmanaged-short>
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public unsafe T Get<T>(MediaAttributeKey<T> guidKey)
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{
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return Get<T>(guidKey.Guid);
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}
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/// <summary>
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/// <p><strong>Applies to: </strong>desktop apps | Metro style apps</p><p> Adds an attribute value with a specified key. </p>
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/// </summary>
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/// <param name="guidKey"><dd> <p> A <see cref="System.Guid"/> that identifies the value to set. If this key already exists, the method overwrites the old value. </p> </dd></param>
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/// <param name="value"><dd> <p> A <strong><see cref="SharpDX.Win32.Variant"/></strong> that contains the attribute value. The method copies the value. The <strong><see cref="SharpDX.Win32.Variant"/></strong> type must be one of the types listed in the <strong><see cref="SharpDX.MediaFoundation.AttributeType"/></strong> enumeration. </p> </dd></param>
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/// <returns><p> The method returns an <strong><see cref="SharpDX.Result"/></strong>. Possible values include, but are not limited to, those in the following table. </p><table> <tr><th>Return code</th><th>Description</th></tr> <tr><td> <dl> <dt><strong><see cref="SharpDX.Result.Ok"/></strong></dt> </dl> </td><td> <p> The method succeeded. </p> </td></tr> <tr><td> <dl> <dt><strong>E_OUTOFMEMORY</strong></dt> </dl> </td><td> <p> Insufficient memory. </p> </td></tr> <tr><td> <dl> <dt><strong>MF_E_INVALIDTYPE</strong></dt> </dl> </td><td> <p> Invalid attribute type. </p> </td></tr> </table><p>?</p></returns>
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/// <remarks>
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/// <p> This method checks whether the <strong><see cref="SharpDX.Win32.Variant"/></strong> type is one of the attribute types defined in <strong><see cref="SharpDX.MediaFoundation.AttributeType"/></strong>, and fails if an unsupported type is used. However, this method does not check whether the <strong><see cref="SharpDX.Win32.Variant"/></strong> is the correct type for the specified attribute <see cref="System.Guid"/>. (There is no programmatic way to associate attribute GUIDs with property types.) For a list of Media Foundation attributes and their data types, see Media Foundation Attributes. </p><p>This interface is available on the following platforms if the Windows Media Format 11 SDK redistributable components are installed:</p><ul> <li>Windows?XP with Service Pack?2 (SP2) and later.</li> <li>Windows?XP Media Center Edition?2005 with KB900325 (Windows?XP Media Center Edition?2005) and KB925766 (October 2006 Update Rollup for Windows?XP Media Center Edition) installed.</li> </ul>
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/// </remarks>
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/// <msdn-id>bb970346</msdn-id>
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/// <unmanaged>HRESULT IMFAttributes::SetItem([In] const GUID& guidKey,[In] const PROPVARIANT& Value)</unmanaged>
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/// <unmanaged-short>IMFAttributes::SetItem</unmanaged-short>
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public unsafe void Set<T>(System.Guid guidKey, T value)
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{
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// Perform conversions to supported types
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// int
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// long
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// string
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// byte[]
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// double
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// ComObject
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// Guid
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if (typeof(T) == typeof(int) || typeof(T) == typeof(bool) || typeof(T) == typeof(byte) || typeof(T) == typeof(uint) || typeof(T) == typeof(short) || typeof(T) == typeof(ushort) || typeof(T) == typeof(byte) || typeof(T) == typeof(sbyte)
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|| typeof(T).GetTypeInfo().IsEnum )
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{
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Set(guidKey, Convert.ToInt32(value));
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return;
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}
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if (typeof(T) == typeof(long) || typeof(T) == typeof(ulong))
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{
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Set(guidKey, Convert.ToInt64(value));
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return;
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}
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if (typeof(T) == typeof(IntPtr))
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{
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Set(guidKey, ((IntPtr)(object)value).ToInt64());
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return;
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}
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if (typeof(T) == typeof(System.Guid))
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{
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Set(guidKey, (System.Guid)(object)value);
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return;
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}
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if (typeof(T) == typeof(string))
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{
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Set(guidKey, value.ToString());
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return;
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}
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if (typeof(T) == typeof(double) || typeof(T) == typeof(float))
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{
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Set(guidKey, Convert.ToDouble(value));
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return;
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}
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if (typeof(T) == typeof(byte[]))
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{
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var arrayValue = ((byte[])(object)value);
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fixed (void* pBuffer = arrayValue)
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SetBlob(guidKey, (IntPtr)pBuffer, arrayValue.Length);
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return;
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}
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if (typeof(T).GetTypeInfo().IsValueType)
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{
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SetBlob(guidKey, (IntPtr)Interop.Fixed(ref value), SharpDX.Interop.SizeOf<T>());
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return;
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}
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if (typeof(T) == typeof(ComObject) || typeof(IUnknown).GetTypeInfo().IsAssignableFrom(typeof(T).GetTypeInfo()))
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{
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Set(guidKey, ((IUnknown)(object)value));
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return;
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}
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throw new ArgumentException("The type of the value is not supported");
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}
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/// <summary>
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/// <p><strong>Applies to: </strong>desktop apps | Metro style apps</p><p> Adds an attribute value with a specified key. </p>
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/// </summary>
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/// <param name="guidKey"><dd> <p> A <see cref="System.Guid"/> that identifies the value to set. If this key already exists, the method overwrites the old value. </p> </dd></param>
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/// <param name="value"><dd> <p> A <strong><see cref="SharpDX.Win32.Variant"/></strong> that contains the attribute value. The method copies the value. The <strong><see cref="SharpDX.Win32.Variant"/></strong> type must be one of the types listed in the <strong><see cref="SharpDX.MediaFoundation.AttributeType"/></strong> enumeration. </p> </dd></param>
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/// <returns><p> The method returns an <strong><see cref="SharpDX.Result"/></strong>. Possible values include, but are not limited to, those in the following table. </p><table> <tr><th>Return code</th><th>Description</th></tr> <tr><td> <dl> <dt><strong><see cref="SharpDX.Result.Ok"/></strong></dt> </dl> </td><td> <p> The method succeeded. </p> </td></tr> <tr><td> <dl> <dt><strong>E_OUTOFMEMORY</strong></dt> </dl> </td><td> <p> Insufficient memory. </p> </td></tr> <tr><td> <dl> <dt><strong>MF_E_INVALIDTYPE</strong></dt> </dl> </td><td> <p> Invalid attribute type. </p> </td></tr> </table><p>?</p></returns>
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/// <remarks>
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/// <p> This method checks whether the <strong><see cref="SharpDX.Win32.Variant"/></strong> type is one of the attribute types defined in <strong><see cref="SharpDX.MediaFoundation.AttributeType"/></strong>, and fails if an unsupported type is used. However, this method does not check whether the <strong><see cref="SharpDX.Win32.Variant"/></strong> is the correct type for the specified attribute <see cref="System.Guid"/>. (There is no programmatic way to associate attribute GUIDs with property types.) For a list of Media Foundation attributes and their data types, see Media Foundation Attributes. </p><p>This interface is available on the following platforms if the Windows Media Format 11 SDK redistributable components are installed:</p><ul> <li>Windows?XP with Service Pack?2 (SP2) and later.</li> <li>Windows?XP Media Center Edition?2005 with KB900325 (Windows?XP Media Center Edition?2005) and KB925766 (October 2006 Update Rollup for Windows?XP Media Center Edition) installed.</li> </ul>
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/// </remarks>
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/// <msdn-id>bb970346</msdn-id>
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/// <unmanaged>HRESULT IMFAttributes::SetItem([In] const GUID& guidKey,[In] const PROPVARIANT& Value)</unmanaged>
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/// <unmanaged-short>IMFAttributes::SetItem</unmanaged-short>
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public unsafe void Set<T>(MediaAttributeKey<T> guidKey, T value)
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{
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Set(guidKey.Guid, value);
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}
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}
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}
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