mikael-lovqvists-claude-agent/video-setup
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Author SHA1 Message Date
mikael-lovqvists-claude-agent
a1b52145d0 feat: add test_image module, xorg viewer sink, and feature flag build system 
Feature flags (FEATURES= make variable):
  glfw       — GLFW + OpenGL viewer (libglfw3, libglew)
  vulkan     — future Vulkan renderer
  turbojpeg  — MJPEG decode/encode (libturbojpeg)
  xorg       — XRandR geometry + screen grab (libx11, libxrandr)
  vaapi      — VA-API hardware codec (libva)
Each flag injects -DHAVE_<FEATURE> and the relevant pkg-config flags.
Headless build: make (no FEATURES set).

test_image module (src/modules/test_image/):
  Generates test frames in YUV420, YUV422, and BGRA.
  Patterns: SMPTE 75% colour bars, greyscale ramp, white/black grid.
  BT.601 limited-range RGB→YCbCr in write_pixel().

test_image_cli (dev/cli/):
  Generates a frame and writes it as a PPM file for visual verification.
  Usage: test_image_cli [--pattern bars|ramp|grid]
                        [--width N] [--height N]
                        [--format yuv420|yuv422|bgra]
                        --out FILE.ppm

xorg module (src/modules/xorg/):
  xorg.c      — full GLFW+OpenGL implementation (compiled with FEATURES=glfw)
  xorg_stub.c — no-op stub (compiled otherwise; xorg_available() returns false)
  Renderer: full-screen quad via gl_VertexID, three GL_R8 textures for YUV,
  BT.601 matrix in fragment shader, GL_BGRA texture for packed frames.
  MJPEG path: tjDecompressToYUVPlanes → planar YUV → upload (requires turbojpeg).
  push_yuv420/push_bgra/push_mjpeg all usable independently.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
 2026-03-28 20:54:07 +00:00
mikael-lovqvists-claude-agent
62c25247ef Add protocol module, video-node binary, query/web CLI tools 
- Protocol module: framed binary encoding for control requests/responses
  (ENUM_DEVICES, ENUM_CONTROLS, GET/SET_CONTROL, STREAM_OPEN/CLOSE)
- video-node: scans /dev/media* and /dev/video*, serves V4L2 device
  topology and controls over TCP; uses UDP discovery for peer announce
- query_cli: auto-discovers a node, queries devices and controls
- protocol_cli: low-level protocol frame decoder for debugging
- dev/web: Express 5 ESM web inspector — live SSE discovery picker,
  REST bridge to video-node, controls UI with sliders/selects/checkboxes
- Makefile: sequential module builds before cli/node to fix make -j races
- common.mk: add DEPFLAGS (-MMD -MP) for automatic header dependencies
- All module Makefiles: split compile/link, generate .d dependency files
- discovery: replace 100ms poll loop with pthread_cond_timedwait;
  respond to all announcements (not just new peers) for instant re-discovery
- ENUM_DEVICES response: carry device_caps (V4L2_CAP_*) per video node
  so clients can distinguish capture nodes from metadata nodes

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
 2026-03-27 01:04:56 +00:00
mikael-lovqvists-claude-agent
a29c556851 Add common, media_ctrl and v4l2_ctrl modules with CLI drivers and docs 
Modules (src/modules/):
- common/error: App_Error struct with structured detail union, error codes,
  app_error_print(); designed for future upgrade to preprocessor-generated
  location codes
- media_ctrl: media device enumeration, topology query (entities/pads/links),
  link enable/disable via Media Controller API (/dev/media*)
- v4l2_ctrl: control enumeration (with menu item fetching), get/set via
  V4L2 ext controls API, device discovery (/dev/video*)

All modules use -std=c11 -D_GNU_SOURCE, build artifacts go to build/ only.
Kernel-version-dependent constants guarded with #ifdef + #warning.

CLI drivers (dev/cli/):
- media_ctrl_cli: list, info, topology, set-link subcommands
- v4l2_ctrl_cli: list, controls, get, set subcommands

Docs (docs/cli/):
- media_ctrl_cli.md and v4l2_ctrl_cli.md with usage, examples, and
  context within the video routing system

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
 2026-03-25 21:40:37 +00:00