def _generate_widevine_data(key_ids, content_id, provider, protection_scheme):
"""Generate widevine pssh data."""
wv = widevine_pssh_data_pb2.WidevinePsshData()
wv.key_id.extend(key_ids)
wv.provider = provider or ''
wv.content_id = content_id
# 'cenc' is the default, so omitted to save bytes.
if protection_scheme and protection_scheme != 'cenc':
wv.protection_scheme = struct.unpack('>L', protection_scheme)[0]
return wv.SerializeToString()
def _parse_widevine_data(data):
"""Parses Widevine PSSH box from the given binary string."""
wv = widevine_pssh_data_pb2.WidevinePsshData()
wv.ParseFromString(data)
ret = []
if wv.key_id:
ret.append('Key IDs (%d):' % len(wv.key_id))
ret.extend([' ' + _create_uuid(x) for x in wv.key_id])
if wv.HasField('provider'):
ret.append('Provider: ' + wv.provider)
if wv.HasField('content_id'):
ret.append('Content ID: ' + base64.b16encode(wv.content_id))
if wv.HasField('policy'):
ret.append('Policy: ' + wv.policy)
if wv.HasField('crypto_period_index'):
ret.append('Crypto Period Index: %d' % wv.crypto_period_index)
return ret
def _generate_widevine_data(key_ids, content_id, provider): wv = widevine_pssh_data_pb2.WidevinePsshData() wv.key_id.extend(key_ids) wv.provider = provider or '' wv.content_id = content_id return wv.SerializeToString()