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Cdm: Change param pssh to init_data

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This is to signal what the Cdm really uses. Asking for a PSSH may sound like it uses a full PSSH when in reality all it cares for is the underlying init data (Widevine Cenc Header/WidevinePsshData).
This commit is contained in:
rlaphoenix 2022-07-30 02:26:11 +01:00
parent b5ac0f45a2
commit 1cedba7e49
1 changed files with 6 additions and 6 deletions
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12
pywidevine/cdm.py
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@ -60,15 +60,15 @@ class Cdm:
NUM_OF_SESSIONS = 0
MAX_NUM_OF_SESSIONS = 50 # most common limit
def __init__(self, device: Device, pssh: Union[Container, bytes, str]):
def __init__(self, device: Device, init_data: Union[Container, bytes, str]):
"""
Open a Widevine Content Decryption Module (CDM) session.
Parameters:
device: Widevine Device containing the Client ID, Device Private Key, and
more device-specific information.
pssh: Protection System Specific Header Box or Init Data. This should be a
compliant mp4 pssh box, or just the init data (Widevine Cenc Header).
init_data: Widevine Cenc Header (Init Data) or a Protection System Specific
Header Box to take the init data from.
Devices have a limit on how many sessions can be open and active concurrently.
The limit is different for each device and security level, most commonly 50.
@ -77,8 +77,8 @@ class Cdm:
"""
if not device:
raise ValueError("A Widevine Device must be provided.")
if not pssh:
raise ValueError("A PSSH Box must be provided.")
if not init_data:
raise ValueError("Init Data (or a PSSH) must be provided.")
if self.NUM_OF_SESSIONS >= self.MAX_NUM_OF_SESSIONS:
raise ValueError(
@ -89,7 +89,7 @@ class Cdm:
self.NUM_OF_SESSIONS += 1
self.device = device
self.init_data = PSSH.get_as_box(pssh).init_data
self.init_data = PSSH.get_as_box(init_data).init_data
self.session_id = get_random_bytes(16)
self.service_certificate: Optional[DrmCertificate] = None