daedalus-v4l2/daemon

daemon/ — daedalus-v4l2 userspace decoder daemon

Userspace daemon that:

1. Connects to the kernel module's chardev
2. Receives bitstream + V4L2 control blobs
3. Parses bitstream via dlopen'd FFmpeg
4. Dispatches per-block work via daedalus_dispatch_* from sibling daedalus-fourier
5. Returns decoded frames to kernel

Status

Scaffold only. Phase 8.3 not yet started.

Build dependencies (planned)

• libdaedalus_core.a from sibling daedalus-fourier (static link)
• FFmpeg dev headers (for AVPacket/AVCodec interface types) + runtime FFmpeg .so (loaded via dlopen)
• libv4l2 (for V4L2 control struct definitions)
• pthread

Build (when implemented)

mkdir build && cd build
cmake .. -DDAEDALUS_FOURIER_DIR=/path/to/daedalus-fourier
make

Layout (planned)

• CMakeLists.txt
• src/main.c — event loop, chardev connection
• src/parser.c — FFmpeg dlopen wrapper + per-codec dispatch
• src/decode_vp9.c, src/decode_av1.c, src/decode_h264.c — per-codec block walkers
• src/frame_io.c — frame allocation, return to kernel

License

BSD-2-Clause (matches daedalus-fourier sibling).

Phase 8.3 starting point

A standalone program that:

1. Opens a .ivf or .mp4
2. Pulls codec packets via dlopen'd avformat
3. Calls dlopen'd avcodec to parse (without decoding)
4. Walks the block-level metadata
5. Validates output structure

No kernel involvement yet — just confirm the parse path works.