mirror of
https://github.com/Hugoved/ism-downloader.git
synced 2026-07-15 18:50:03 +02:00
944 lines
29 KiB
Python
944 lines
29 KiB
Python
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import io
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import time
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import base64
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import binascii
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import re
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import inspect
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from struct import Struct
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u8 = Struct(">B")
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u88 = Struct(">Bx")
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u16 = Struct(">H")
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u1616 = Struct(">Hxx")
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u32 = Struct(">I")
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u64 = Struct(">Q")
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s88 = Struct(">bx")
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s16 = Struct(">h")
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s1616 = Struct(">hxx")
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s32 = Struct(">i")
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unity_matrix = (s32.pack(0x10000) + s32.pack(0) * 3) * 2 + s32.pack(0x40000000)
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TRACK_ENABLED = 0x1
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TRACK_IN_MOVIE = 0x2
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TRACK_IN_PREVIEW = 0x4
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SELF_CONTAINED = 0x1
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PLAYREADY_SYSTEM_ID = "9a04f07998404286ab92e65be0885f95"
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WIDEVINE_SYSTEM_ID = "edef8ba979d64acea3c827dcd51d21ed"
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START_CODE = b"\x00\x00\x00\x01"
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class BinaryWriter:
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def __init__(self, stream):
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self.stream = stream
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def WriteUInt(self, n, offset=0):
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if isinstance(n, str):
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n = n.encode("ascii")
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n = u32.pack(n)
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if offset:
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n = n[offset:]
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return self.stream.write(n)
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def Write(self, n):
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if isinstance(n, str):
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n = n.encode("ascii")
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if not isinstance(n, int):
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return self.stream.write(bytes(n))
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n = u8.pack(n)
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return self.stream.write(n)
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def WriteInt(self, n):
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if isinstance(n, str):
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n = n.encode("ascii")
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n = s32.pack(n)
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return self.stream.write(n)
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def WriteULong(self, n):
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if isinstance(n, str):
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n = n.encode("ascii")
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n = u64.pack(n)
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return self.stream.write(n)
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def WriteUShort(self, n, padding=0):
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if isinstance(n, str):
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n = n.encode("ascii")
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n = (u16 if not padding else u1616).pack(n)
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return self.stream.write(n)
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def WriteShort(self, n, padding=0):
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if isinstance(n, str):
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n = n.encode("ascii")
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n = (s16 if not padding else s1616).pack(n)
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return self.stream.write(n)
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def WriteByte(self, n, padding=0):
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if isinstance(n, str):
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n = n.encode("ascii")
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if not isinstance(n, int):
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return self.stream.write(bytes(n))
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n = (u8 if not padding else s88).pack(n)
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return self.stream.write(n)
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def write_piff_header(stream, params):
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track_id = int(params.get("track_id", 1) or 1)
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duration = int(params["duration"])
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kid = params.get("kid")
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timescale = int(params.get("timescale", 10000000) or 10000000)
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language = str(params.get("language", "und") or "und").lower()
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height = int(params.get("height", 0) or 0)
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width = int(params.get("width", 0) or 0)
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pssh = params.get("pssh")
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type = params["media_type"]
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is_drm_protected = bool(params.get("is_drm_protected"))
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if len(language) != 3:
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language = "und"
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first_segment = params.get("first_segment") or params.get("init_segment")
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if first_segment:
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try:
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blob = first_segment if isinstance(first_segment, (bytes, bytearray)) else bytes(first_segment)
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moof_data = extract_box_data(blob, [b"moof"])
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traf_data = extract_box_data(moof_data, [b"traf"])
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tfhd_data = extract_box_data(traf_data, [b"tfhd"])
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if tfhd_data and len(tfhd_data) >= 8:
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track_id = int.from_bytes(tfhd_data[4:8], byteorder="big")
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except Exception:
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pass
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if is_drm_protected:
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normalized_kid = None
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if kid is not None:
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if isinstance(kid, bytes):
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if len(kid) == 16:
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normalized_kid = kid.hex()
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else:
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try:
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normalized_kid = kid.decode("ascii", errors="ignore")
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except Exception:
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normalized_kid = kid.hex()
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else:
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normalized_kid = str(kid).strip()
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normalized_kid = normalized_kid.replace("-", "").replace(" ", "")
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if normalized_kid.startswith("0x"):
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normalized_kid = normalized_kid[2:]
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try:
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normalized_kid = bytes.fromhex(normalized_kid).hex()
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except Exception:
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normalized_kid = None
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if normalized_kid is None and pssh:
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protection_data = None
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if isinstance(pssh, bytes):
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protection_data = bytes(pssh)
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else:
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text = str(pssh).strip()
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try:
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protection_data = base64.b64decode(text)
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except Exception:
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try:
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protection_data = bytes.fromhex(text.replace("-", "").replace(" ", ""))
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except Exception:
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protection_data = None
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if protection_data:
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try:
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xml_text = protection_data.decode("utf-16-le", errors="ignore")
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if "<KID>" not in xml_text.upper():
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xml_text = protection_data.decode("utf-8", errors="ignore")
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match = re.search(r"<KID>(.*?)</KID>", xml_text, flags=re.IGNORECASE | re.DOTALL)
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if match:
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kid_bytes = base64.b64decode(match.group(1))
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if len(kid_bytes) == 16:
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kid_bytes = bytearray(kid_bytes)
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kid_bytes[0:4] = reversed(kid_bytes[0:4])
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kid_bytes[4:6] = reversed(kid_bytes[4:6])
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kid_bytes[6:8] = reversed(kid_bytes[6:8])
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normalized_kid = bytes(kid_bytes).hex()
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except Exception:
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pass
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kid = normalized_kid or ("00" * 16)
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else:
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kid = None
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file_type_box = get_file_type_box()
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stream.write(file_type_box)
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moov_payload = get_mvhd_box(timescale, duration)
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trak_payload = get_tkhd_box(track_id, duration, width, height)
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mdhd_payload = get_mdhd_box(language, timescale, duration)
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hdlr_payload = get_hdlr_box(type)
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mdia_payload = mdhd_payload + hdlr_payload
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minf_payload = get_minf_box(type)
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stbl_payload = full_box("stts", 0, 0, entry_count(0))
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stbl_payload += full_box("stsc", 0, 0, entry_count(0))
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stbl_payload += full_box("stco", 0, 0, entry_count(0))
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stbl_payload += full_box("stsz", 0, 0, entry_count(0) + entry_count(0))
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stsd_params = dict(params)
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stsd_params["track_id"] = track_id
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stsd_params["kid"] = kid
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stsd_payload = get_stsd_box(stsd_params, kid)
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stbl_payload += full_box("stsd", 0, 0, stsd_payload)
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stbl_box = box("stbl", stbl_payload)
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minf_payload += stbl_box
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minf_box = box("minf", minf_payload)
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mdia_payload += minf_box
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mdia_box = box("mdia", mdia_payload)
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trak_payload += mdia_box
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trak_box = box("trak", trak_payload)
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moov_payload += trak_box
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mvex_payload = get_mehd_box(duration)
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mvex_payload += get_trex_box(track_id)
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moov_payload += box("mvex", mvex_payload)
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if is_drm_protected:
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if pssh:
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moov_payload += get_playready_pssh_box(pssh)
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if kid:
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moov_payload += get_widevine_pssh_box(kid)
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stream.write(box("moov", moov_payload))
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return stream
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def entry_count(byte):
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return u32.pack(byte)
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def get_file_type_box():
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stream = io.BytesIO()
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writer = BinaryWriter(stream)
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writer.Write(b"mp41")
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writer.WriteUInt(1)
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for compatible_brand in ("iso8","isom","mp41","dash","cmfc"):
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writer.Write(compatible_brand.encode("ascii"))
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return box("ftyp", stream.getvalue())
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def get_mvhd_box(timescale, duration):
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stream = io.BytesIO()
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writer = BinaryWriter(stream)
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now = int(time.time())
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writer.WriteULong(now)
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writer.WriteULong(now)
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writer.WriteUInt(timescale)
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writer.WriteULong(duration)
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writer.WriteUShort(1, padding=2)
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writer.WriteByte(1, padding=1)
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writer.WriteUShort(0)
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for _ in range(2):
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writer.WriteUInt(0)
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writer.Write(unity_matrix)
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for _ in range(6):
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writer.WriteUInt(0)
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writer.WriteUInt(0xFFFFFFFF)
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return full_box("mvhd", 1, 0, stream.getvalue())
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def get_tkhd_box(track_id, duration, width, height):
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stream = io.BytesIO()
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writer = BinaryWriter(stream)
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now = int(time.time())
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writer.WriteULong(now)
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writer.WriteULong(now)
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writer.WriteUInt(track_id)
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writer.WriteUInt(0)
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writer.WriteULong(duration)
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for _ in range(2):
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writer.WriteUInt(0)
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writer.WriteShort(0)
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writer.WriteShort(0)
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writer.WriteByte(1 if width == 0 and height == 0 else 0, padding=1)
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writer.WriteUShort(0)
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writer.Write(unity_matrix)
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writer.WriteUShort(width, padding=2)
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writer.WriteUShort(height, padding=2)
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return full_box(
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"tkhd",
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1,
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TRACK_ENABLED | TRACK_IN_MOVIE | TRACK_IN_PREVIEW,
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stream.getvalue(),
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)
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def get_mdhd_box(language, timescale, duration):
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stream = io.BytesIO()
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writer = BinaryWriter(stream)
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language = str(language or "und").lower()
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if len(language) != 3:
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language = "und"
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now = int(time.time())
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writer.WriteULong(now)
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writer.WriteULong(now)
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writer.WriteUInt(timescale)
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writer.WriteULong(duration)
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writer.WriteUShort(
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((ord(language[0]) - 0x60) << 10)
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| ((ord(language[1]) - 0x60) << 5)
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| (ord(language[2]) - 0x60)
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)
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writer.WriteUShort(0)
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return full_box("mdhd", 1, 0, stream.getvalue())
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def get_hdlr_box(type):
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stream = io.BytesIO()
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writer = BinaryWriter(stream)
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writer.WriteUInt(0)
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if type == "audio":
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writer.Write(b"soun")
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for _ in range(3):
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writer.WriteUInt(0)
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writer.Write(b"audio\0")
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elif type == "video":
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writer.Write(b"vide")
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for _ in range(3):
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writer.WriteUInt(0)
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writer.Write(b"video\0")
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elif type == "text":
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writer.Write(b"subt")
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for _ in range(3):
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writer.WriteUInt(0)
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writer.Write(b"subtitle\0")
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else:
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raise NotImplementedError(f"Track Type {type!r} is not supported.")
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return full_box("hdlr", 0, 0, stream.getvalue())
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def get_minf_box(type):
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if type == "audio":
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smhd_box = s88.pack(0)
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smhd_box += u16.pack(0)
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minf_payload = full_box("smhd", 0, 0, bytes(smhd_box))
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elif type == "video":
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vmhd_box = u16.pack(0)
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for _ in range(3):
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vmhd_box += u16.pack(0)
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minf_payload = full_box("vmhd", 0, 1, bytes(vmhd_box))
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elif type == "text":
|
||
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minf_payload = full_box("sthd", 0, 0, b"")
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else:
|
||
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raise NotImplementedError(f"Track Type {type!r} is not supported.")
|
||
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|
||
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dref_payload = entry_count(1)
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|
|
dref_payload += full_box("url ", 0, SELF_CONTAINED, b"")
|
||
|
|
|
||
|
|
dinf_payload = full_box("dref", 0, 0, bytes(dref_payload))
|
||
|
|
minf_payload += box("dinf", bytes(dinf_payload))
|
||
|
|
|
||
|
|
return bytes(minf_payload)
|
||
|
|
|
||
|
|
|
||
|
|
def get_stsd_box(params, kid):
|
||
|
|
stream = io.BytesIO()
|
||
|
|
writer = BinaryWriter(stream)
|
||
|
|
|
||
|
|
writer.WriteUInt(1)
|
||
|
|
sample_entry_data = get_sample_entry_box(params, kid)
|
||
|
|
writer.Write(sample_entry_data)
|
||
|
|
|
||
|
|
return stream.getvalue()
|
||
|
|
|
||
|
|
|
||
|
|
def get_sample_entry_box(params, kid):
|
||
|
|
stream = io.BytesIO()
|
||
|
|
writer = BinaryWriter(stream)
|
||
|
|
|
||
|
|
for _ in range(6):
|
||
|
|
writer.WriteByte(0)
|
||
|
|
|
||
|
|
writer.WriteUShort(1)
|
||
|
|
|
||
|
|
codec = str(params["codec"])
|
||
|
|
codec_lower = codec.lower()
|
||
|
|
type = params["media_type"]
|
||
|
|
cpd = params.get("codec_private_data", "")
|
||
|
|
|
||
|
|
if isinstance(cpd, bytes):
|
||
|
|
codec_private_data = bytes(cpd)
|
||
|
|
else:
|
||
|
|
cleaned_cpd = str(cpd or "").strip().replace(" ", "").replace("-", "")
|
||
|
|
codec_private_data = binascii.unhexlify(cleaned_cpd.encode()) if cleaned_cpd else b""
|
||
|
|
|
||
|
|
if type == "audio":
|
||
|
|
for _ in range(2):
|
||
|
|
writer.WriteUInt(0)
|
||
|
|
|
||
|
|
writer.WriteUShort(int(params.get("channels", 2) or 2))
|
||
|
|
writer.WriteUShort(int(params.get("bits", 16) or 16))
|
||
|
|
writer.WriteUShort(0)
|
||
|
|
writer.WriteUShort(0)
|
||
|
|
writer.WriteUShort(int(params.get("sample_rate", 48000) or 48000), padding=2)
|
||
|
|
|
||
|
|
if "aac" in codec_lower:
|
||
|
|
if codec_private_data:
|
||
|
|
esds_box = get_esds_box(
|
||
|
|
int(params.get("track_id", 1) or 1),
|
||
|
|
int(params.get("bitrate", 0) or 0),
|
||
|
|
codec_private_data,
|
||
|
|
)
|
||
|
|
writer.Write(esds_box)
|
||
|
|
|
||
|
|
if params.get("is_drm_protected"):
|
||
|
|
sinf_box = get_sinf_box(kid, "mp4a")
|
||
|
|
writer.Write(sinf_box)
|
||
|
|
return box("enca", stream.getvalue())
|
||
|
|
else:
|
||
|
|
return box("mp4a", stream.getvalue())
|
||
|
|
elif codec_lower in ("e-ac3", "ec-3", "ec3"):
|
||
|
|
dec3_payload = params.get("dec3_payload") or params.get("dec3")
|
||
|
|
if dec3_payload is not None:
|
||
|
|
if isinstance(dec3_payload, str):
|
||
|
|
dec3_payload = bytes.fromhex(dec3_payload.replace(" ", "").replace("-", ""))
|
||
|
|
writer.Write(full_box("dec3", 0, 0, bytes(dec3_payload)))
|
||
|
|
else:
|
||
|
|
atmos = bool(
|
||
|
|
params.get("is_atmos")
|
||
|
|
or params.get("joc")
|
||
|
|
or params.get("dolby_atmos")
|
||
|
|
or "atmos" in str(params.get("profile", "")).lower()
|
||
|
|
or "joc" in str(params.get("profile", "")).lower()
|
||
|
|
)
|
||
|
|
writer.Write(get_dec3_box(atmos=atmos))
|
||
|
|
|
||
|
|
if params.get("is_drm_protected"):
|
||
|
|
sinf_box = get_sinf_box(kid, "ec-3")
|
||
|
|
writer.Write(sinf_box)
|
||
|
|
return box("enca", stream.getvalue())
|
||
|
|
else:
|
||
|
|
return box("ec-3", stream.getvalue())
|
||
|
|
else:
|
||
|
|
raise NotImplementedError(f"Audio Codec {codec!r} is not supported.")
|
||
|
|
elif type == "video":
|
||
|
|
writer.WriteUShort(0)
|
||
|
|
writer.WriteUShort(0)
|
||
|
|
|
||
|
|
for _ in range(3):
|
||
|
|
writer.WriteUInt(0)
|
||
|
|
|
||
|
|
writer.WriteUShort(int(params.get("width", 0) or 0))
|
||
|
|
writer.WriteUShort(int(params.get("height", 0) or 0))
|
||
|
|
writer.WriteUShort(0x48, padding=2)
|
||
|
|
writer.WriteUShort(0x48, padding=2)
|
||
|
|
writer.WriteUInt(0)
|
||
|
|
writer.WriteUShort(1)
|
||
|
|
|
||
|
|
for _ in range(32):
|
||
|
|
writer.WriteByte(0)
|
||
|
|
|
||
|
|
writer.WriteUShort(0x18)
|
||
|
|
writer.WriteShort(-1)
|
||
|
|
|
||
|
|
nal_units = [n for n in codec_private_data.split(START_CODE) if n] if codec_private_data and START_CODE in codec_private_data else []
|
||
|
|
|
||
|
|
if codec_lower == "avc1":
|
||
|
|
sps = next((n for n in nal_units if n and (n[0] & 0x1F) == 7), None)
|
||
|
|
pps = next((n for n in nal_units if n and (n[0] & 0x1F) == 8), None)
|
||
|
|
if sps is None or pps is None:
|
||
|
|
raise ValueError("Missing SPS or PPS in AVC codec private data")
|
||
|
|
|
||
|
|
avcc_box = get_avcc_box(
|
||
|
|
int(params.get("nal_unit_length_field", 4) or 4), sps, pps
|
||
|
|
)
|
||
|
|
writer.Write(avcc_box)
|
||
|
|
|
||
|
|
if params.get("is_drm_protected"):
|
||
|
|
frma_codec = str(params.get("frma_codec") or params.get("sinf_codec") or "avc1").lower()
|
||
|
|
sinf_box = get_sinf_box(kid, frma_codec)
|
||
|
|
writer.Write(sinf_box)
|
||
|
|
return box("encv", stream.getvalue())
|
||
|
|
else:
|
||
|
|
return box("avc1", stream.getvalue())
|
||
|
|
|
||
|
|
elif codec_lower in ("hvc1", "hev1"):
|
||
|
|
vps = next((n for n in nal_units if n and (((n[0] >> 1) & 0x3F) == 32)), None)
|
||
|
|
sps = next((n for n in nal_units if n and (((n[0] >> 1) & 0x3F) == 33)), None)
|
||
|
|
pps = next((n for n in nal_units if n and (((n[0] >> 1) & 0x3F) == 34)), None)
|
||
|
|
if not (vps and sps and pps):
|
||
|
|
raise ValueError("Missing VPS, SPS, or PPS in HEVC codec private data")
|
||
|
|
|
||
|
|
hvcc_box = get_hvcc_box(
|
||
|
|
int(params.get("nal_unit_length_field", 4) or 4), sps, pps, vps
|
||
|
|
)
|
||
|
|
writer.Write(hvcc_box)
|
||
|
|
|
||
|
|
if params.get("is_drm_protected"):
|
||
|
|
frma_codec = str(params.get("frma_codec") or params.get("sinf_codec") or codec_lower).lower()
|
||
|
|
sinf_box = get_sinf_box(kid, frma_codec)
|
||
|
|
writer.Write(sinf_box)
|
||
|
|
return box("encv", stream.getvalue())
|
||
|
|
else:
|
||
|
|
return box(codec_lower, stream.getvalue())
|
||
|
|
|
||
|
|
elif codec_lower in ("dvhe", "dvh1"):
|
||
|
|
vps = next((n for n in nal_units if n and (((n[0] >> 1) & 0x3F) == 32)), None)
|
||
|
|
sps = next((n for n in nal_units if n and (((n[0] >> 1) & 0x3F) == 33)), None)
|
||
|
|
pps = next((n for n in nal_units if n and (((n[0] >> 1) & 0x3F) == 34)), None)
|
||
|
|
|
||
|
|
if not (vps and sps and pps):
|
||
|
|
raise ValueError("Missing VPS, SPS, or PPS in codec private data")
|
||
|
|
|
||
|
|
hvcc_box = get_hvcc_box(
|
||
|
|
int(params.get("nal_unit_length_field", 4) or 4), sps, pps, vps
|
||
|
|
)
|
||
|
|
dvcc_box = generate_hvcc_dvcc_box()
|
||
|
|
|
||
|
|
writer.Write(hvcc_box)
|
||
|
|
writer.Write(dvcc_box)
|
||
|
|
|
||
|
|
clli_box = params.get("clli_box")
|
||
|
|
clli_payload = params.get("clli_payload")
|
||
|
|
if clli_box is not None:
|
||
|
|
if isinstance(clli_box, str):
|
||
|
|
clli_box = bytes.fromhex(clli_box.replace(" ", "").replace("-", ""))
|
||
|
|
writer.Write(bytes(clli_box))
|
||
|
|
elif clli_payload is not None:
|
||
|
|
if isinstance(clli_payload, str):
|
||
|
|
clli_payload = bytes.fromhex(clli_payload.replace(" ", "").replace("-", ""))
|
||
|
|
writer.Write(box("clli", bytes(clli_payload)))
|
||
|
|
|
||
|
|
mdcv_box = params.get("mdcv_box")
|
||
|
|
mdcv_payload = params.get("mdcv_payload")
|
||
|
|
if mdcv_box is not None:
|
||
|
|
if isinstance(mdcv_box, str):
|
||
|
|
mdcv_box = bytes.fromhex(mdcv_box.replace(" ", "").replace("-", ""))
|
||
|
|
writer.Write(bytes(mdcv_box))
|
||
|
|
elif mdcv_payload is not None:
|
||
|
|
if isinstance(mdcv_payload, str):
|
||
|
|
mdcv_payload = bytes.fromhex(mdcv_payload.replace(" ", "").replace("-", ""))
|
||
|
|
writer.Write(box("mdcv", bytes(mdcv_payload)))
|
||
|
|
|
||
|
|
bitrate = int(params.get("bitrate", 0) or 0)
|
||
|
|
if bitrate > 0:
|
||
|
|
btrt_stream = io.BytesIO()
|
||
|
|
btrt_writer = BinaryWriter(btrt_stream)
|
||
|
|
btrt_writer.WriteUInt(bitrate)
|
||
|
|
btrt_writer.WriteUInt(bitrate)
|
||
|
|
btrt_writer.WriteUInt(bitrate)
|
||
|
|
writer.Write(box("btrt", btrt_stream.getvalue()))
|
||
|
|
|
||
|
|
if params.get("is_drm_protected"):
|
||
|
|
default_frma = "hvc1" if codec_lower == "dvhe" else codec_lower
|
||
|
|
frma_codec = str(params.get("frma_codec") or params.get("sinf_codec") or default_frma).lower()
|
||
|
|
sinf_box = get_sinf_box(kid, frma_codec)
|
||
|
|
writer.Write(sinf_box)
|
||
|
|
return box("encv", stream.getvalue())
|
||
|
|
else:
|
||
|
|
return box(codec_lower, stream.getvalue())
|
||
|
|
else:
|
||
|
|
raise NotImplementedError(f"Video Codec {codec!r} is not supported.")
|
||
|
|
|
||
|
|
elif type == "text":
|
||
|
|
if codec == "TTML":
|
||
|
|
writer.Write("http://www.w3.org/ns/ttml\0")
|
||
|
|
writer.Write("\0")
|
||
|
|
writer.Write("\0")
|
||
|
|
|
||
|
|
return box("stpp", stream.getvalue())
|
||
|
|
else:
|
||
|
|
raise NotImplementedError(f"Subtitle Codec {codec!r} is not supported.")
|
||
|
|
else:
|
||
|
|
raise NotImplementedError(f"Track Type {type!r} is not supported.")
|
||
|
|
|
||
|
|
|
||
|
|
def get_mehd_box(duration):
|
||
|
|
stream = io.BytesIO()
|
||
|
|
writer = BinaryWriter(stream)
|
||
|
|
|
||
|
|
writer.WriteULong(duration)
|
||
|
|
|
||
|
|
return full_box("mehd", 1, 0, stream.getvalue())
|
||
|
|
|
||
|
|
|
||
|
|
def get_trex_box(track_id):
|
||
|
|
stream = io.BytesIO()
|
||
|
|
writer = BinaryWriter(stream)
|
||
|
|
|
||
|
|
writer.WriteUInt(track_id)
|
||
|
|
writer.WriteUInt(1)
|
||
|
|
writer.WriteUInt(0)
|
||
|
|
writer.WriteUInt(0)
|
||
|
|
writer.WriteUInt(0)
|
||
|
|
|
||
|
|
return full_box("trex", 0, 0, stream.getvalue())
|
||
|
|
|
||
|
|
|
||
|
|
def extract_box_data(data, box_sequence):
|
||
|
|
data_reader = io.BytesIO(data)
|
||
|
|
while True:
|
||
|
|
header = data_reader.read(8)
|
||
|
|
if len(header) < 8:
|
||
|
|
raise ValueError(f"Could not find box path: {box_sequence!r}")
|
||
|
|
|
||
|
|
box_size = u32.unpack(header[:4])[0]
|
||
|
|
box_type = header[4:8]
|
||
|
|
|
||
|
|
if box_size == 1:
|
||
|
|
largesize = data_reader.read(8)
|
||
|
|
if len(largesize) < 8:
|
||
|
|
raise ValueError("Invalid large-size MP4 box")
|
||
|
|
box_size = int.from_bytes(largesize, byteorder="big")
|
||
|
|
header_size = 16
|
||
|
|
else:
|
||
|
|
header_size = 8
|
||
|
|
|
||
|
|
if box_size < header_size:
|
||
|
|
raise ValueError("Invalid MP4 box size")
|
||
|
|
|
||
|
|
payload_size = box_size - header_size
|
||
|
|
|
||
|
|
if box_type == box_sequence[0]:
|
||
|
|
box_data = data_reader.read(payload_size)
|
||
|
|
if len(box_sequence) == 1:
|
||
|
|
return box_data
|
||
|
|
return extract_box_data(box_data, box_sequence[1:])
|
||
|
|
|
||
|
|
data_reader.seek(payload_size, 1)
|
||
|
|
|
||
|
|
|
||
|
|
def box(box_type, payload):
|
||
|
|
stream = io.BytesIO()
|
||
|
|
writer = BinaryWriter(stream)
|
||
|
|
|
||
|
|
writer.WriteUInt(8 + len(payload))
|
||
|
|
writer.Write(box_type.encode("ascii"))
|
||
|
|
writer.Write(payload)
|
||
|
|
|
||
|
|
return stream.getvalue()
|
||
|
|
|
||
|
|
|
||
|
|
def full_box(box_type, version, flags, payload):
|
||
|
|
stream = io.BytesIO()
|
||
|
|
writer = BinaryWriter(stream)
|
||
|
|
|
||
|
|
writer.Write(version)
|
||
|
|
writer.WriteUInt(flags, offset=1)
|
||
|
|
|
||
|
|
return box(box_type, stream.getvalue() + payload)
|
||
|
|
|
||
|
|
|
||
|
|
def get_avcc_box(nal_unit_length_field, sps: bytes, pps: bytes):
|
||
|
|
stream = io.BytesIO()
|
||
|
|
writer = BinaryWriter(stream)
|
||
|
|
|
||
|
|
writer.WriteByte(1)
|
||
|
|
writer.Write(sps[1:4])
|
||
|
|
writer.WriteByte(0xFC | (nal_unit_length_field - 1))
|
||
|
|
writer.WriteByte(1)
|
||
|
|
writer.WriteUShort(len(sps))
|
||
|
|
writer.Write(sps)
|
||
|
|
writer.WriteByte(1)
|
||
|
|
writer.WriteUShort(len(pps))
|
||
|
|
writer.Write(pps)
|
||
|
|
|
||
|
|
return box("avcC", stream.getvalue())
|
||
|
|
|
||
|
|
def get_dec3_box(atmos=False):
|
||
|
|
stream = io.BytesIO()
|
||
|
|
writer = BinaryWriter(stream)
|
||
|
|
|
||
|
|
payload = b"\x0e\x00\x20\x0f\x00\x01\x10" if atmos else b"\x14\x00\x20\x0f\x00\x00\x00"
|
||
|
|
writer.Write(payload)
|
||
|
|
|
||
|
|
return full_box("dec3", 0, 0, stream.getvalue())
|
||
|
|
|
||
|
|
def generate_hvcc_dvcc_box():
|
||
|
|
stream = io.BytesIO()
|
||
|
|
writer = BinaryWriter(stream)
|
||
|
|
|
||
|
|
try:
|
||
|
|
frame = inspect.currentframe().f_back
|
||
|
|
params = frame.f_locals.get("params", {}) if frame else {}
|
||
|
|
except Exception:
|
||
|
|
params = {}
|
||
|
|
|
||
|
|
raw_box = params.get("dvcc_box") or params.get("dvcC_box") or params.get("dvvC_box")
|
||
|
|
if raw_box is not None:
|
||
|
|
if isinstance(raw_box, str):
|
||
|
|
raw_box = bytes.fromhex(raw_box.replace(" ", "").replace("-", ""))
|
||
|
|
raw_box = bytes(raw_box)
|
||
|
|
if len(raw_box) >= 8 and raw_box[4:8] in (b"dvcC", b"dvvC"):
|
||
|
|
return raw_box
|
||
|
|
|
||
|
|
payload = params.get("dvcc_payload") or params.get("dvcC_payload") or params.get("dvvC_payload")
|
||
|
|
if payload is not None:
|
||
|
|
if isinstance(payload, str):
|
||
|
|
payload = bytes.fromhex(payload.replace(" ", "").replace("-", ""))
|
||
|
|
payload = bytes(payload)
|
||
|
|
box_type = str(params.get("dv_box_type") or params.get("dv_config_box_type") or "dvcC")
|
||
|
|
return box(box_type, payload)
|
||
|
|
|
||
|
|
dv_codec = str(params.get("dv_codec") or params.get("codec_string") or params.get("codec") or "")
|
||
|
|
match = re.search(r"(?:dvhe|dvh1|dva1|dvav)\.(\d{2})\.(\d{2})", dv_codec, flags=re.IGNORECASE)
|
||
|
|
|
||
|
|
profile = int(params.get("dv_profile", 5) or 5)
|
||
|
|
level = params.get("dv_level")
|
||
|
|
if match:
|
||
|
|
profile = int(match.group(1))
|
||
|
|
if level is None:
|
||
|
|
level = int(match.group(2))
|
||
|
|
|
||
|
|
width = int(params.get("width", 0) or 0)
|
||
|
|
height = int(params.get("height", 0) or 0)
|
||
|
|
|
||
|
|
if level is None:
|
||
|
|
if width > 0 and height > 0:
|
||
|
|
if width <= 720 and height <= 576:
|
||
|
|
level = 1
|
||
|
|
elif width <= 1280 and height <= 720:
|
||
|
|
level = 3
|
||
|
|
elif width <= 1920 and height <= 1080:
|
||
|
|
level = 4
|
||
|
|
elif width <= 2560 and height <= 1440:
|
||
|
|
level = 5
|
||
|
|
elif width <= 3840 and height <= 2160:
|
||
|
|
level = 6
|
||
|
|
else:
|
||
|
|
level = 7
|
||
|
|
else:
|
||
|
|
level = 6
|
||
|
|
|
||
|
|
level = int(level)
|
||
|
|
|
||
|
|
rpu_present = 1 if params.get("dv_rpu_present", 1) else 0
|
||
|
|
el_present = 1 if params.get("dv_el_present", 0) else 0
|
||
|
|
bl_present = 1 if params.get("dv_bl_present", 1) else 0
|
||
|
|
compatibility_id = int(params.get("dv_compatibility_id", 0) or 0) & 0x0F
|
||
|
|
dv_version_major = int(params.get("dv_version_major", 1) or 1) & 0xFF
|
||
|
|
dv_version_minor = int(params.get("dv_version_minor", 0) or 0) & 0xFF
|
||
|
|
|
||
|
|
payload = bytearray(24)
|
||
|
|
payload[0] = dv_version_major
|
||
|
|
payload[1] = dv_version_minor
|
||
|
|
payload[2] = ((profile & 0x7F) << 1) | ((level >> 5) & 0x01)
|
||
|
|
payload[3] = ((level & 0x1F) << 3) | ((rpu_present & 0x01) << 2) | ((el_present & 0x01) << 1) | (bl_present & 0x01)
|
||
|
|
payload[4] = (compatibility_id & 0x0F) << 4
|
||
|
|
|
||
|
|
writer.Write(payload)
|
||
|
|
|
||
|
|
default_box_type = "dvvC" if profile >= 8 else "dvcC"
|
||
|
|
box_type = str(params.get("dv_box_type") or params.get("dv_config_box_type") or default_box_type)
|
||
|
|
|
||
|
|
return box(box_type, stream.getvalue())
|
||
|
|
|
||
|
|
def get_hvcc_box(nal_unit_length_field, sps: bytes, pps: bytes, vps: bytes):
|
||
|
|
ori_sps = bytes(sps)
|
||
|
|
enc_list = bytearray()
|
||
|
|
|
||
|
|
with io.BytesIO(sps) as reader:
|
||
|
|
while reader.tell() < len(sps):
|
||
|
|
byte_value = reader.read(1)
|
||
|
|
if not byte_value:
|
||
|
|
break
|
||
|
|
enc_list.extend(byte_value)
|
||
|
|
if len(enc_list) >= 3 and enc_list[-3:] == bytes([0x00, 0x00, 0x03]):
|
||
|
|
enc_list.pop()
|
||
|
|
|
||
|
|
sps = bytes(enc_list)
|
||
|
|
|
||
|
|
with io.BytesIO(sps) as reader:
|
||
|
|
reader.read(2)
|
||
|
|
first_byte = reader.read(1)[0]
|
||
|
|
max_sub_layers_minus1 = (first_byte & 0x0E) >> 1
|
||
|
|
next_byte = reader.read(1)[0]
|
||
|
|
general_profile_space = (next_byte & 0xC0) >> 6
|
||
|
|
general_tier_flag = (next_byte & 0x20) >> 5
|
||
|
|
general_profile_idc = next_byte & 0x1F
|
||
|
|
general_profile_compatibility_flags = int.from_bytes(reader.read(4), byteorder="big")
|
||
|
|
constraint_bytes = bytearray(reader.read(6))
|
||
|
|
general_level_idc = reader.read(1)[0]
|
||
|
|
|
||
|
|
stream = io.BytesIO()
|
||
|
|
writer = BinaryWriter(stream)
|
||
|
|
|
||
|
|
writer.WriteByte(1)
|
||
|
|
writer.WriteByte(
|
||
|
|
(general_profile_space << 6)
|
||
|
|
+ (0x20 if general_tier_flag == 1 else 0)
|
||
|
|
+ general_profile_idc
|
||
|
|
)
|
||
|
|
writer.WriteUInt(
|
||
|
|
general_profile_compatibility_flags
|
||
|
|
)
|
||
|
|
writer.Write(constraint_bytes)
|
||
|
|
writer.WriteByte(general_level_idc)
|
||
|
|
writer.WriteUShort(0xF000)
|
||
|
|
writer.WriteByte(0xFC)
|
||
|
|
writer.WriteByte(0xFC)
|
||
|
|
writer.WriteByte(0xF8)
|
||
|
|
writer.WriteByte(0xF8)
|
||
|
|
writer.WriteUShort(0)
|
||
|
|
writer.WriteByte(
|
||
|
|
(0 << 6) | (min(max_sub_layers_minus1, 7) << 3) | (0 << 2) | (nal_unit_length_field - 1)
|
||
|
|
)
|
||
|
|
writer.WriteByte(0x03)
|
||
|
|
|
||
|
|
writer.WriteByte(0x20)
|
||
|
|
writer.WriteUShort(1)
|
||
|
|
writer.WriteUShort(len(vps))
|
||
|
|
writer.Write(vps)
|
||
|
|
writer.WriteByte(0x21)
|
||
|
|
writer.WriteUShort(1)
|
||
|
|
writer.WriteUShort(len(ori_sps))
|
||
|
|
writer.Write(ori_sps)
|
||
|
|
writer.WriteByte(0x22)
|
||
|
|
writer.WriteUShort(1)
|
||
|
|
writer.WriteUShort(len(pps))
|
||
|
|
writer.Write(pps)
|
||
|
|
|
||
|
|
return box("hvcC", stream.getvalue())
|
||
|
|
|
||
|
|
def get_esds_box(track_id, bitrate, codec_private_data: bytes):
|
||
|
|
stream = io.BytesIO()
|
||
|
|
writer = BinaryWriter(stream)
|
||
|
|
|
||
|
|
writer.WriteByte(0x03)
|
||
|
|
writer.WriteByte(20 + len(codec_private_data))
|
||
|
|
writer.WriteByte((track_id & 0xFF00) >> 8)
|
||
|
|
writer.WriteByte(track_id & 0x00FF)
|
||
|
|
writer.WriteByte(0)
|
||
|
|
|
||
|
|
writer.WriteByte(0x04)
|
||
|
|
writer.WriteByte(15 + len(codec_private_data))
|
||
|
|
writer.WriteByte(0x40)
|
||
|
|
writer.WriteByte((0x05 << 2) | (0 << 1) | 1)
|
||
|
|
|
||
|
|
for _ in range(3):
|
||
|
|
writer.WriteByte(0xFF)
|
||
|
|
|
||
|
|
writer.WriteByte((bitrate & 0xFF000000) >> 24)
|
||
|
|
writer.WriteByte((bitrate & 0x00FF0000) >> 16)
|
||
|
|
writer.WriteByte((bitrate & 0x0000FF00) >> 8)
|
||
|
|
writer.WriteByte(bitrate & 0x000000FF)
|
||
|
|
writer.WriteByte((bitrate & 0xFF000000) >> 24)
|
||
|
|
writer.WriteByte((bitrate & 0x00FF0000) >> 16)
|
||
|
|
writer.WriteByte((bitrate & 0x0000FF00) >> 8)
|
||
|
|
writer.WriteByte(bitrate & 0x000000FF)
|
||
|
|
|
||
|
|
writer.WriteByte(0x05)
|
||
|
|
writer.WriteByte(len(codec_private_data))
|
||
|
|
writer.Write(codec_private_data)
|
||
|
|
|
||
|
|
return full_box("esds", 0, 0, stream.getvalue())
|
||
|
|
|
||
|
|
|
||
|
|
def get_sinf_box(key_id, codec):
|
||
|
|
key_id = str(key_id or "").replace("-", "").replace(" ", "")
|
||
|
|
if key_id.startswith("0x"):
|
||
|
|
key_id = key_id[2:]
|
||
|
|
key_id = bytes.fromhex(key_id)
|
||
|
|
frmaBox = box("frma", codec.encode("ascii"))
|
||
|
|
|
||
|
|
sinfPayload = bytearray()
|
||
|
|
sinfPayload.extend(frmaBox)
|
||
|
|
|
||
|
|
schmPayload = bytearray()
|
||
|
|
schmPayload.extend(b"cenc")
|
||
|
|
|
||
|
|
schmPayload.extend(
|
||
|
|
bytes([0, 1, 0, 0])
|
||
|
|
)
|
||
|
|
schmBox = full_box("schm", 0, 0, bytes(schmPayload))
|
||
|
|
|
||
|
|
sinfPayload.extend(schmBox)
|
||
|
|
|
||
|
|
tencPayload = bytearray()
|
||
|
|
tencPayload.extend(bytes([0, 0]))
|
||
|
|
tencPayload.append(TRACK_ENABLED)
|
||
|
|
tencPayload.append(0x8)
|
||
|
|
tencPayload.extend(key_id)
|
||
|
|
tencBox = full_box("tenc", 0, 0, bytes(tencPayload))
|
||
|
|
|
||
|
|
schiBox = box("schi", tencBox)
|
||
|
|
sinfPayload.extend(schiBox)
|
||
|
|
|
||
|
|
return box("sinf", bytes(sinfPayload))
|
||
|
|
|
||
|
|
|
||
|
|
def get_playready_pssh_box(pssh):
|
||
|
|
stream = io.BytesIO()
|
||
|
|
writer = BinaryWriter(stream)
|
||
|
|
|
||
|
|
protection_data = bytes.fromhex(base64.b64decode(pssh).hex())
|
||
|
|
|
||
|
|
sys_id_data = bytes.fromhex(PLAYREADY_SYSTEM_ID)
|
||
|
|
pssh_data = protection_data
|
||
|
|
|
||
|
|
writer.Write(sys_id_data)
|
||
|
|
writer.WriteUInt(len(pssh_data))
|
||
|
|
writer.Write(pssh_data)
|
||
|
|
|
||
|
|
return full_box("pssh", 0, 0, stream.getvalue())
|
||
|
|
|
||
|
|
|
||
|
|
def get_widevine_pssh_box(key_id):
|
||
|
|
stream = io.BytesIO()
|
||
|
|
writer = BinaryWriter(stream)
|
||
|
|
|
||
|
|
sys_id_data = bytes.fromhex(WIDEVINE_SYSTEM_ID)
|
||
|
|
pssh_data = bytes.fromhex(f"08011210{key_id}1A046E647265220400000000")
|
||
|
|
|
||
|
|
writer.Write(sys_id_data)
|
||
|
|
writer.WriteUInt(len(pssh_data))
|
||
|
|
writer.Write(pssh_data)
|
||
|
|
|
||
|
|
return full_box("pssh", 0, 0, stream.getvalue())
|