RexiMemo/switchnote-tools
1
0 Fork 0
mirror of https://github.com/RexiMemo-org/switchnote-tools.git synced 2026-10-30 08:19:13 +00:00
Code Issues Packages Projects Releases Wiki Activity

corrected switchnote speed

Browse Source
This commit is contained in:
Rekushi authored and GitHub committed 2026-10-20 04:01:33 +01:00
1 parent 8f31bdd977
commit fa99395580
6 files changed
+45 -16
Download Patch File Download Diff File Expand all files Collapse all files

No files matched your search

sppm-python/sppm_tools.py
+15 -5
View File
@@ -40,6 +40,7 @@ class AudioTrack:
name: str
frame_triggers: list[int]
pcm: array.array
reference_speed: int = 0
@dataclass
@@ -208,7 +209,7 @@ def read_sppm(source: Input, *, legacy_hmac_key: Optional[bytes] = None) -> Sppm
frame_count, audio_count, reserved = r.u32(), r.u8(), r.u16()
if (version not in (1, 2, 3) or header_size != HEADER_SIZE or total_size != len(body) or
width != WIDTH or height != HEIGHT or layer_count != 4 or palette_count != 256 or
not 1 <= fps <= 30 or not 1 <= frame_count <= 9999 or audio_count > 4 or reserved != 0 or
not 1 <= fps <= 30 or not 1 <= frame_count <= 9999 or audio_count > 4 or (reserved != 0 if version < 3 else reserved > 8) or
(flags & ~(3 if version == 1 else 15))):
raise SppmError("unsupported SPPM header")
if zlib.crc32(body[HEADER_SIZE:]) & 0xFFFFFFFF != expected_crc:
@@ -228,7 +229,10 @@ def read_sppm(source: Input, *, legacy_hmac_key: Optional[bytes] = None) -> Sppm
"authorFsid": r.id(), "originalAuthorFsid": r.id(), "lastEditorFsid": r.id(),
"currentId": r.id(), "rootId": r.id(), "parentId": r.id(True),
"createdUnixSeconds": r.u64(), "modifiedUnixSeconds": r.u64(), "coverFrame": r.u32(),
"width": width, "height": height, "fps": fps, "locked": bool(flags & 1),
"width": width, "height": height,
"speed": reserved if version >= 3 else 0, "nominalFps": fps,
"fps": (0.4985, 1.0, 2.0, 4.0, 5.9972, 11.986, 19.9459, 29.9275)[reserved - 1] if version >= 3 and reserved else fps,
"locked": bool(flags & 1),
"allowSpinoffs": bool(flags & 2), "bgmFollowsSpeed": version == 1 or bool(flags & 4),
"loopPlayback": True if version == 1 else not bool(flags & 8),
"frameCount": frame_count, "audioTrackCount": audio_count, "formatVersion": version,
@@ -280,8 +284,12 @@ def read_sppm(source: Input, *, legacy_hmac_key: Optional[bytes] = None) -> Sppm
pcm.frombytes(raw_pcm)
if struct.pack("=H", 1) != b"\x01\x00":
pcm.byteswap()
tracks.append(AudioTrack(index, channels, fps if ti == 0 and version == 1 else reference_fps,
sample_rate, name, cues, pcm))
reference_speed = reference_fps if version >= 3 and reserved != 0 and ti == 0 else 0
if version >= 3 and reserved != 0 and (reference_speed > 8 or (ti > 0 and reference_fps != 0)):
raise SppmError("invalid audio speed metadata")
legacy_reference_fps = (fps if ti == 0 else reference_fps) if version < 3 or reserved == 0 else 0
tracks.append(AudioTrack(index, channels, legacy_reference_fps,
sample_rate, name, cues, pcm, reference_speed))
if r.at != body_end:
raise SppmError("unexpected trailing bytes")
return SppmNote(meta, palette, frames, tracks, signature)
@@ -358,7 +366,9 @@ def _mix_wav(note: SppmNote, wav_path: str, sample_rate: int = 48000, chunk_seco
times = (base + np.arange(count, dtype=np.float64)) / sample_rate
for track, source in sources:
if track.index == 0:
rate = track.sample_rate * (fps / (track.reference_fps or fps) if note.metadata["bgmFollowsSpeed"] else 1.0)
reference_fps = ((0.4985, 1.0, 2.0, 4.0, 5.9972, 11.986, 19.9459, 29.9275)[track.reference_speed - 1]
if track.reference_speed else (track.reference_fps or fps))
rate = track.sample_rate * (fps / reference_fps if note.metadata["bgmFollowsSpeed"] else 1.0)
positions = times * rate
valid = np.ones(count, dtype=bool) if note.metadata["loopPlayback"] else positions < len(source)
if note.metadata["loopPlayback"]: