Fixed exporting an imported usm

Author: donmai-me

CHANGELOG.md

@@ -4,6 +4,13 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.2.4] - 2022-03-28
+## Changed
+- pack\_pages function now return an empty byte when given an empty list instead of throwing an exception.
+
+## Fixed
+- Fixed GenericVideo initialization in Usm open method.
+
 ## [0.2.3] - 2022-03-28
 ## Changed
 - Improved USM probe handling of unknown chunks
@@ -35,6 +42,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Fixed bug in extractusm that causes it to fail when output directory doesn't exist.
 - Fixed bug where program fails when directory exists.
 
+[0.2.4]: https://github.com/donmai-me/WannaCRI/compare/0.2.3...0.2.4
 [0.2.3]: https://github.com/donmai-me/WannaCRI/compare/0.2.2...0.2.3
 [0.2.2]: https://github.com/donmai-me/WannaCRI/compare/0.2.1...0.2.2
 [0.2.1]: https://github.com/donmai-me/WannaCRI/compare/0.2.0...0.2.1

wannacri/usm/page.py

@@ -264,7 +264,7 @@ def pack_pages(
     string_padding: int = 0,
 ) -> bytes:
     if len(pages) == 0:
-        raise ValueError("No pages given.")
+        return bytes()
 
     page_name = pages[0].name
     keys = set()

wannacri/usm/usm.py

@@ -187,7 +187,8 @@ def open(
                     ),
                     crid[0],
                     video_channel.header,
-                    channel_number,
+                    len(video_channel.stream),
+                    channel_number=channel_number,
                 )
             )
 
@@ -207,7 +208,8 @@ def open(
                     audio_sink(usmfile, usmmutex, audio_channel.stream),
                     crid[0],
                     audio_channel.header,
-                    channel_number,
+                    len(audio_channel.stream),
+                    channel_number=channel_number,
                 )
             )
 
@@ -444,7 +446,7 @@ def _process_chunks(
                         },
                     )
             elif chunk.payload_type == PayloadType.HEADER:
-                video_ch[chunk.channel_number].header = chunk.payload
+                video_ch[chunk.channel_number].header = chunk.payload[0]
             elif chunk.payload_type == PayloadType.METADATA:
                 video_ch[chunk.channel_number].metadata = chunk.payload
 
@@ -471,7 +473,7 @@ def _process_chunks(
                         },
                     )
             elif chunk.payload_type == PayloadType.HEADER:
-                audio_ch[chunk.channel_number].header = chunk.payload
+                audio_ch[chunk.channel_number].header = chunk.payload[0]
             elif chunk.payload_type == PayloadType.METADATA:
                 audio_ch[chunk.channel_number].metadata = chunk.payload