//! \file ArcANI.cs //! \date Thu Mar 09 10:06:53 2017 //! \brief Anime Game System animation resource. // // Copyright (C) 2015-2017 by morkt // // Permission is hereby granted, free of charge, to any person obtaining a copy // of this software and associated documentation files (the "Software"), to // deal in the Software without restriction, including without limitation the // rights to use, copy, modify, merge, publish, distribute, sublicense, and/or // sell copies of the Software, and to permit persons to whom the Software is // furnished to do so, subject to the following conditions: // // The above copyright notice and this permission notice shall be included in // all copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS // IN THE SOFTWARE. // using System; using System.Collections.Generic; using System.ComponentModel.Composition; using System.IO; using System.Linq; namespace GameRes.Formats.Ags { internal class AniEntry : Entry { public int FrameIndex; public int FrameType; public int KeyFrame; } [Export(typeof(ArchiveFormat))] public class AniOpener : ArchiveFormat { public override string Tag { get { return "ANI"; } } public override string Description { get { return "Anime Game System animation resource"; } } public override uint Signature { get { return 0; } } public override bool IsHierarchic { get { return false; } } public override bool CanWrite { get { return false; } } public override ArcFile TryOpen (ArcView file) { if (!file.Name.HasExtension (".ani")) return null; uint first_offset = file.View.ReadUInt32 (0); if (first_offset < 4 || file.MaxOffset > int.MaxValue || first_offset >= file.MaxOffset || 0 != (first_offset & 3)) return null; int frame_count = (int)(first_offset / 4); if (frame_count > 10000) return null; long index_offset = 4; var frame_table = new uint[frame_count]; frame_table[0] = first_offset; for (int i = 1; i < frame_count; ++i) { var offset = file.View.ReadUInt32 (index_offset); index_offset += 4; if (offset < first_offset || offset >= file.MaxOffset) return null; frame_table[i] = offset; } var frame_map = new Dictionary<uint, byte>(); foreach (var offset in frame_table) { if (!frame_map.ContainsKey (offset)) { byte frame_type = file.View.ReadByte (offset); if (frame_type >= 0x20) return null; frame_map[offset] = frame_type; } } int last_key_frame = 0; var dir = new List<Entry>(); for (int i = 0; i < frame_count; ++i) { var offset = frame_table[i]; int frame_type = frame_map[offset]; if (1 == frame_type) continue; frame_type &= 0xF; if (0 == frame_type || 0xA == frame_type) last_key_frame = dir.Count; var entry = new AniEntry { Name = i.ToString ("D4"), Type = "image", Offset = offset, FrameType = frame_type, KeyFrame = last_key_frame, FrameIndex = dir.Count, }; dir.Add (entry); } if (0 == dir.Count) return null; var ordered = dir.OrderBy (e => e.Offset).ToList(); for (int i = 0; i < ordered.Count; ++i) { var entry = ordered[i] as AniEntry; long next_offset = file.MaxOffset; for (int j = i+1; j <= ordered.Count; ++j) { next_offset = j == ordered.Count ? file.MaxOffset : ordered[j].Offset; if (next_offset != entry.Offset) break; } entry.Size = (uint)(next_offset - entry.Offset); } return new ArcFile (file, this, dir); } public override IImageDecoder OpenImage (ArcFile arc, Entry entry) { var ani = (AniEntry)entry; byte[] key_frame = null; if (ani.KeyFrame != ani.FrameIndex) { var dir = (List<Entry>)arc.Dir; for (int i = ani.KeyFrame; i < ani.FrameIndex; ++i) { var frame = dir[i]; using (var s = arc.File.CreateStream (frame.Offset, frame.Size)) { var frame_info = Cg.ReadMetaData (s) as CgMetaData; if (null == frame_info) break; using (var reader = new CgFormat.Reader (s, frame_info, key_frame)) { reader.Unpack(); key_frame = reader.Data; } } } } var input = arc.File.CreateStream (entry.Offset, entry.Size); try { var info = Cg.ReadMetaData (input) as CgMetaData; if (null == info) throw new InvalidFormatException(); return new CgFormat.Reader (input, info, key_frame); } catch { input.Dispose(); throw; } } static Lazy<ImageFormat> s_Cg = new Lazy<ImageFormat> (() => ImageFormat.FindByTag ("CG")); ImageFormat Cg { get { return s_Cg.Value; } } } }