mikael-lovqvists-claude-agent/video-setup
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feat: add test_image module, xorg viewer sink, and feature flag build system

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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>
This commit is contained in:
mikael-lovqvists-claude-agent
2026-03-28 20:54:07 +00:00
parent 98c700390d
commit a1b52145d0
12 changed files with 946 additions and 22 deletions
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7
src/node/Makefile
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@@ -11,6 +11,7 @@ TRANSPORT_OBJ = $(BUILD)/transport/transport.o
DISCOVERY_OBJ = $(BUILD)/discovery/discovery.o
CONFIG_OBJ = $(BUILD)/config/config.o
PROTOCOL_OBJ = $(BUILD)/protocol/protocol.o
XORG_OBJ = $(BUILD)/xorg/xorg.o
.PHONY: all clean
@@ -18,8 +19,9 @@ all: $(NODE_BUILD)/video-node
$(NODE_BUILD)/video-node: $(MAIN_OBJ) \
$(COMMON_OBJ) $(MEDIA_OBJ) $(V4L2_OBJ) $(SERIAL_OBJ) \
$(TRANSPORT_OBJ) $(DISCOVERY_OBJ) $(CONFIG_OBJ) $(PROTOCOL_OBJ)
$(CC) $(CFLAGS) -o $@ $^ -lpthread
$(TRANSPORT_OBJ) $(DISCOVERY_OBJ) $(CONFIG_OBJ) $(PROTOCOL_OBJ) \
$(XORG_OBJ)
$(CC) $(CFLAGS) -o $@ $^ -lpthread $(PKG_LDFLAGS)
$(MAIN_OBJ): main.c | $(NODE_BUILD)
$(CC) $(CFLAGS) $(DEPFLAGS) -c -o $@ $<
@@ -32,6 +34,7 @@ $(TRANSPORT_OBJ): ; $(MAKE) -C $(ROOT)/src/modules/transport
$(DISCOVERY_OBJ): ; $(MAKE) -C $(ROOT)/src/modules/discovery
$(CONFIG_OBJ): ; $(MAKE) -C $(ROOT)/src/modules/config
$(PROTOCOL_OBJ): ; $(MAKE) -C $(ROOT)/src/modules/protocol
$(XORG_OBJ): ; $(MAKE) -C $(ROOT)/src/modules/xorg
$(NODE_BUILD):
mkdir -p $@