Extract animations

tools/asset_extractor/asset_extractor.py

@@ -10,6 +10,7 @@ from assets.gfx_group import GfxGroup
 from assets.fixed_type_gfx import FixedTypeGfx
 from assets.frame_obj_lists import FrameObjLists
 from assets.extra_frame_offsets import ExtraFrameOffsets
+from assets.animation import Animation
 
 verbose = False
 
@@ -126,6 +127,9 @@ def extract_assets(variant, assets_folder):
                     elif mode == 'extra_frame_offsets':
                         extra_frame_offsets = ExtraFrameOffsets(path, start, size, options)
                         extra_frame_offsets.extract_binary(baserom)
+                    elif mode == 'animation':
+                        animation = Animation(path, start, size, options)
+                        animation.extract_binary(baserom)
                     elif mode != '':
                         print(f'Asset type {mode} not yet implemented')
 

tools/asset_extractor/assets/animation.py

@@ -0,0 +1,28 @@
+from assets.base import BaseAsset, Reader
+
+class Animation(BaseAsset):
+    def __init__(self, path: str, addr: int, size: int, options: any) -> None:
+        super().__init__(path, addr, size, options)
+
+    def extract_binary(self, rom: bytearray) -> None:
+        reader = Reader(rom[self.addr:self.addr+self.size])
+        lines = []
+        end_of_animation = False
+        while not end_of_animation and reader.cursor+3 < self.size:
+            frame_index = reader.read_u8()
+            keyframe_duration = reader.read_u8()
+            bitfield = reader.read_u8()
+            bitfield2 = reader.read_u8()
+
+            end_of_animation = bitfield2 & 0x80 != 0
+            lines.append(f'\t.byte {frame_index}, {keyframe_duration}, {hex(bitfield)}, {hex(bitfield2)}\n')
+        if not end_of_animation:
+            lines.append('@ TODO why no terminator?\n')
+        while reader.cursor < self.size:
+            keyframe_count = reader.read_u8()
+            lines.append(f'\t.byte {keyframe_count} @ keyframe count\n')
+
+        assert(self.path.endswith('.bin'))
+        path = self.path[0:-4] + '.s'
+        with open(path, 'w') as file:
+            file.writelines(lines)