Devine
/
pywidevine
mirror of https://github.com/devine-dl/pywidevine.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Cdm: Change param pssh to init_data 

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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
pywidevine/cdm.py
View File

@ -60,15 +60,15 @@ class Cdm:
NUM_OF_SESSIONS = 0 NUM_OF_SESSIONS = 0
MAX_NUM_OF_SESSIONS = 50 # most common limit 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. Open a Widevine Content Decryption Module (CDM) session.
Parameters: Parameters:
device: Widevine Device containing the Client ID, Device Private Key, and device: Widevine Device containing the Client ID, Device Private Key, and
more device-specific information. more device-specific information.
pssh: Protection System Specific Header Box or Init Data. This should be a init_data: Widevine Cenc Header (Init Data) or a Protection System Specific
compliant mp4 pssh box, or just the init data (Widevine Cenc Header). Header Box to take the init data from.
Devices have a limit on how many sessions can be open and active concurrently. 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. The limit is different for each device and security level, most commonly 50.
@ -77,8 +77,8 @@ class Cdm:
""" """
if not device: if not device:
raise ValueError("A Widevine Device must be provided.") raise ValueError("A Widevine Device must be provided.")
if not pssh: if not init_data:
raise ValueError("A PSSH Box must be provided.") raise ValueError("Init Data (or a PSSH) must be provided.")
if self.NUM_OF_SESSIONS >= self.MAX_NUM_OF_SESSIONS: if self.NUM_OF_SESSIONS >= self.MAX_NUM_OF_SESSIONS:
raise ValueError( raise ValueError(
@ -89,7 +89,7 @@ class Cdm:
self.NUM_OF_SESSIONS += 1 self.NUM_OF_SESSIONS += 1
self.device = device 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.session_id = get_random_bytes(16)
self.service_certificate: Optional[DrmCertificate] = None self.service_certificate: Optional[DrmCertificate] = None