Refactor: Move demuxer-related options from global ccx_options to ccx_demuxer struct

[AhmedAlian7]

Problem

Several functions in src/lib_ccx/file_functions.c rely on the global ccx_options struct for configuration values, specifically:

• ccx_options.live_stream
• ccx_options.buffer_input
• ccx_options.input_source
• ccx_options.binary_concat

This creates tight coupling between the demuxer logic and global application state.

Current Behavior

Functions such as:

• buffered_read_opt()
• switch_to_next_file()
• ccx_demuxer_open()
• ccx_demuxer_close()

directly access the global ccx_options struct instead of receiving configuration through the demuxer context.

Why This Is Problematic

• Testability — Functions relying on globals are difficult to unit test in isolation.
• Encapsulation — The demuxer's behavior depends on external state it does not own.
• Thread safety — Global state increases the risk of race conditions in multi-threaded scenarios.
• Library reuse — Tight coupling makes lib_ccx harder to use as a standalone library.

Proposed Solution

• Add live_stream, buffer_input, input_source, and binary_concat fields to struct ccx_demuxer.
• Initialize these fields from ccx_options during demuxer initialization (e.g., in init_demuxer()).
• Update affected functions to read configuration from the demuxer context (ctx->) instead of the global ccx_options.

Affected Files

• src/lib_ccx/ccx_demuxer.h
• src/lib_ccx/ccx_demuxer.c
• src/lib_ccx/file_functions.c

[ansh27singh]

@AhmedAlian7
Can I take this issue, Assign this issue to me