422 lines
16 KiB
C#
422 lines
16 KiB
C#
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using Godot;
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using System;
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using System.Runtime.InteropServices;
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using System.Threading.Tasks;
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namespace VideoOrchestra.Platform
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{
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/// <summary>
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/// Windows VP9 decoder implementation using Media Foundation
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/// </summary>
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public class WindowsVP9Decoder : IVP9PlatformDecoder
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{
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private const int MAX_STREAMS = 3;
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private const uint MFSTARTUP_NOSOCKET = 0x1;
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private const uint MFSTARTUP_LITE = 0x1;
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private const uint MFSTARTUP_FULL = 0x0;
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// Media Foundation interfaces and structures
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private IntPtr[] _mediaFoundationDecoders = new IntPtr[MAX_STREAMS];
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private IntPtr[] _d3d11Textures = new IntPtr[MAX_STREAMS];
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private ImageTexture[] _godotTextures = new ImageTexture[MAX_STREAMS];
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private bool _initialized = false;
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private bool _hardwareEnabled = true;
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private int _width = 0;
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private int _height = 0;
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private VP9DecoderStatus _status = VP9DecoderStatus.Uninitialized;
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public string PlatformName => "Windows";
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public bool IsHardwareDecodingSupported => CheckHardwareSupport();
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#region Media Foundation P/Invoke Declarations
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[DllImport("mfplat.dll", CallingConvention = CallingConvention.StdCall)]
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private static extern int MFStartup(uint version, uint flags);
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[DllImport("mfplat.dll", CallingConvention = CallingConvention.StdCall)]
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private static extern int MFShutdown();
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[DllImport("mfplat.dll", CallingConvention = CallingConvention.StdCall)]
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private static extern int MFCreateMediaType(out IntPtr mediaType);
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[DllImport("mf.dll", CallingConvention = CallingConvention.StdCall)]
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private static extern int MFCreateSourceResolver(out IntPtr sourceResolver);
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[DllImport("mf.dll", CallingConvention = CallingConvention.StdCall)]
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private static extern int MFCreateTopology(out IntPtr topology);
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[DllImport("d3d11.dll", CallingConvention = CallingConvention.StdCall)]
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private static extern int D3D11CreateDevice(
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IntPtr adapter, uint driverType, IntPtr software, uint flags,
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IntPtr featureLevels, uint featureLevelCount, uint sdkVersion,
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out IntPtr device, out uint featureLevel, out IntPtr context);
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// GUIDs for Media Foundation
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private static readonly Guid MF_MT_MAJOR_TYPE = new("48eba18e-f8c9-4687-bf11-0a74c9f96a8f");
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private static readonly Guid MF_MT_SUBTYPE = new("f7e34c9a-42e8-4714-b74b-cb29d72c35e5");
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private static readonly Guid MFMediaType_Video = new("73646976-0000-0010-8000-00aa00389b71");
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private static readonly Guid MFVideoFormat_VP90 = new("30395056-0000-0010-8000-00aa00389b71");
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private static readonly Guid MFVideoFormat_NV12 = new("3231564e-0000-0010-8000-00aa00389b71");
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#endregion
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public WindowsVP9Decoder()
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{
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for (int i = 0; i < MAX_STREAMS; i++)
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{
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_mediaFoundationDecoders[i] = IntPtr.Zero;
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_d3d11Textures[i] = IntPtr.Zero;
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_godotTextures[i] = null;
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}
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}
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public bool Initialize(int width, int height, bool enableHardware = true)
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{
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try
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{
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_width = width;
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_height = height;
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_hardwareEnabled = enableHardware && IsHardwareDecodingSupported;
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bool mediaFoundationAvailable = false;
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// Initialize Media Foundation
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try
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{
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// Use version 2.0 (0x00020070) and LITE startup mode for basic functionality
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int hr = MFStartup(0x00020070, MFSTARTUP_LITE);
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if (hr != 0)
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{
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// Try full mode as fallback
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hr = MFStartup(0x00020070, MFSTARTUP_FULL);
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if (hr != 0)
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{
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// Common error codes:
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// 0xC00D36E3 = MF_E_PLATFORM_NOT_INITIALIZED
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// 0xC00D36E4 = MF_E_ALREADY_INITIALIZED
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string errorMsg = hr switch
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{
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unchecked((int)0xC00D36E3) => "Media Foundation platform not available",
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unchecked((int)0xC00D36E4) => "Media Foundation already initialized (continuing)",
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unchecked((int)0x80004005) => "Media Foundation access denied",
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_ => $"Media Foundation startup failed with HRESULT 0x{hr:X8}"
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};
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if (hr == unchecked((int)0xC00D36E4))
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{
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// Already initialized is OK, we can continue
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GD.Print("Media Foundation already initialized, continuing...");
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mediaFoundationAvailable = true;
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}
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else
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{
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GD.PrintErr($"Windows Media Foundation initialization failed: {errorMsg}");
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GD.Print("Falling back to software-only simulation mode...");
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mediaFoundationAvailable = false;
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_hardwareEnabled = false;
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}
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}
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else
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{
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mediaFoundationAvailable = true;
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}
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}
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else
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{
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mediaFoundationAvailable = true;
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}
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}
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catch (DllNotFoundException)
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{
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GD.Print("Media Foundation DLLs not found, using software simulation mode");
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mediaFoundationAvailable = false;
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_hardwareEnabled = false;
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}
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catch (Exception ex)
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{
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GD.PrintErr($"Media Foundation initialization exception: {ex.Message}");
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mediaFoundationAvailable = false;
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_hardwareEnabled = false;
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}
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// Initialize D3D11 device for hardware decoding if enabled
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if (_hardwareEnabled && mediaFoundationAvailable)
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{
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if (!InitializeD3D11())
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{
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GD.Print("Warning: Failed to initialize D3D11, falling back to software decoding");
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_hardwareEnabled = false;
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}
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}
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// Initialize decoders for each stream
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for (int i = 0; i < MAX_STREAMS; i++)
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{
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if (!InitializeStreamDecoder(i))
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{
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GD.PrintErr($"Failed to initialize decoder for stream {i}");
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// Don't fail completely - continue with simulation mode
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GD.Print($"Using simulation mode for stream {i}");
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_mediaFoundationDecoders[i] = new IntPtr(i + 100); // Simulation placeholder
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}
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_godotTextures[i] = new ImageTexture();
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}
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_initialized = true;
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_status = VP9DecoderStatus.Initialized;
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string mode = mediaFoundationAvailable ?
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(_hardwareEnabled ? "Hardware (Media Foundation)" : "Software (Media Foundation)") :
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"Simulation";
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GD.Print($"Windows VP9 decoder initialized: {width}x{height}, Mode: {mode}");
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return true;
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}
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catch (Exception ex)
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{
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GD.PrintErr($"Error initializing Windows VP9 decoder: {ex.Message}");
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_status = VP9DecoderStatus.Error;
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Release();
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return false;
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}
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}
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private bool CheckHardwareSupport()
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{
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try
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{
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// Check for D3D11 and VP9 hardware decoder support
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IntPtr device, context;
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uint featureLevel;
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int hr = D3D11CreateDevice(
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IntPtr.Zero, 1, IntPtr.Zero, 0,
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IntPtr.Zero, 0, 7, out device, out featureLevel, out context);
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if (hr == 0 && device != IntPtr.Zero)
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{
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Marshal.Release(device);
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Marshal.Release(context);
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return true;
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}
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return false;
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}
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catch
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{
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return false;
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}
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}
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private bool InitializeD3D11()
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{
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try
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{
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// Initialize D3D11 device for hardware-accelerated decoding
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// This would create the D3D11 device and context needed for Media Foundation
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// For now, we'll simulate this initialization
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return true;
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}
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catch (Exception ex)
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{
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GD.PrintErr($"Failed to initialize D3D11: {ex.Message}");
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return false;
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}
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}
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private bool InitializeStreamDecoder(int streamId)
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{
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try
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{
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// Create Media Foundation decoder for this stream
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// This would involve:
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// 1. Creating IMFTransform for VP9 decoder
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// 2. Setting input/output media types
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// 3. Configuring for hardware acceleration if enabled
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// For now, we'll simulate successful initialization
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_mediaFoundationDecoders[streamId] = new IntPtr(streamId + 1); // Non-null placeholder
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return true;
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}
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catch (Exception ex)
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{
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GD.PrintErr($"Failed to initialize decoder for stream {streamId}: {ex.Message}");
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return false;
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}
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}
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public bool DecodeFrame(byte[] frameData, int streamId)
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{
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if (!_initialized || streamId < 0 || streamId >= MAX_STREAMS)
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{
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return false;
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}
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if (frameData == null || frameData.Length == 0)
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{
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return false;
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}
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try
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{
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_status = VP9DecoderStatus.Decoding;
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// Process VP9 frame through Media Foundation
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bool success = ProcessFrameWithMediaFoundation(frameData, streamId);
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if (success)
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{
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// Update Godot texture with decoded frame
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UpdateGodotTexture(streamId);
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}
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else
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{
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_status = VP9DecoderStatus.Error;
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}
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return success;
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}
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catch (Exception ex)
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{
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GD.PrintErr($"Error decoding frame for stream {streamId}: {ex.Message}");
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_status = VP9DecoderStatus.Error;
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return false;
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}
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}
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private bool ProcessFrameWithMediaFoundation(byte[] frameData, int streamId)
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{
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try
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{
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// This would involve:
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// 1. Creating IMFSample from input data
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// 2. Calling IMFTransform.ProcessInput()
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// 3. Calling IMFTransform.ProcessOutput() to get decoded frame
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// 4. Converting output to texture format
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// For demonstration, simulate successful decode
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GD.Print($"[Windows MF] Decoding frame for stream {streamId}: {frameData.Length} bytes");
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// Simulate some processing time
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Task.Delay(1).Wait();
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return true;
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}
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catch (Exception ex)
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{
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throw new VP9DecoderException(PlatformName, streamId, $"Media Foundation decode failed: {ex.Message}");
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}
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}
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private void UpdateGodotTexture(int streamId)
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{
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try
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{
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// Create dummy texture data for demonstration
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// In real implementation, this would convert the decoded frame from Media Foundation
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// to a format Godot can use (RGBA8 or similar)
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var image = Image.CreateEmpty(_width, _height, false, Image.Format.Rgba8);
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// Fill with a pattern to show it's working (different color per stream)
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var color = streamId switch
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{
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0 => Colors.Red,
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1 => Colors.Green,
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2 => Colors.Blue,
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_ => Colors.White
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};
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image.Fill(color);
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_godotTextures[streamId].SetImage(image);
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GD.Print($"Updated texture for stream {streamId}");
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}
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catch (Exception ex)
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{
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GD.PrintErr($"Failed to update texture for stream {streamId}: {ex.Message}");
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}
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}
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public ImageTexture GetDecodedTexture(int streamId)
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{
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if (!_initialized || streamId < 0 || streamId >= MAX_STREAMS)
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{
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return null;
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}
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return _godotTextures[streamId];
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}
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public uint GetNativeTextureId(int streamId)
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{
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if (!_initialized || streamId < 0 || streamId >= MAX_STREAMS)
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{
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return 0;
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}
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// Return D3D11 texture handle if available
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return (uint)_d3d11Textures[streamId].ToInt64();
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}
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public VP9DecoderStatus GetStatus()
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{
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return _status;
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}
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public void Release()
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{
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try
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{
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_status = VP9DecoderStatus.Released;
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// Release Media Foundation resources
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for (int i = 0; i < MAX_STREAMS; i++)
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{
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if (_mediaFoundationDecoders[i] != IntPtr.Zero)
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{
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// Release IMFTransform
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Marshal.Release(_mediaFoundationDecoders[i]);
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_mediaFoundationDecoders[i] = IntPtr.Zero;
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}
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if (_d3d11Textures[i] != IntPtr.Zero)
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{
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// Release D3D11 texture
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Marshal.Release(_d3d11Textures[i]);
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_d3d11Textures[i] = IntPtr.Zero;
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}
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_godotTextures[i]?.Dispose();
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_godotTextures[i] = null;
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}
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// Shutdown Media Foundation if it was initialized
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if (_initialized)
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{
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try
|
||
|
|
{
|
||
|
|
MFShutdown();
|
||
|
|
}
|
||
|
|
catch (Exception ex)
|
||
|
|
{
|
||
|
|
GD.Print($"Warning: Error shutting down Media Foundation: {ex.Message}");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
_initialized = false;
|
||
|
|
GD.Print("Windows VP9 decoder released");
|
||
|
|
}
|
||
|
|
catch (Exception ex)
|
||
|
|
{
|
||
|
|
GD.PrintErr($"Error releasing Windows VP9 decoder: {ex.Message}");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
public void Dispose()
|
||
|
|
{
|
||
|
|
Release();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|