add libjpeg-turbo package (#15)

Vendors libjpeg-turbo 3.1.0 as a static library for openpilot, following
the same pattern as zstd/ncurses/zeromq.

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

libjpeg/build.sh

@@ -0,0 +1,56 @@
+#!/usr/bin/env bash
+set -e
+
+DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null && pwd)"
+cd "$DIR"
+
+VERSION="3.1.0"
+INSTALL_DIR="$DIR/libjpeg/install"
+
+# Idempotent: skip if already built
+if [ -f "$INSTALL_DIR/lib/libjpeg.a" ]; then
+  echo "libjpeg already present, skipping build."
+  exit 0
+fi
+
+NJOBS="$(nproc 2>/dev/null || sysctl -n hw.ncpu 2>/dev/null || echo 2)"
+
+# Clone
+if [ ! -d "libjpeg-turbo-src" ]; then
+  git clone --depth 1 --branch "${VERSION}" https://github.com/libjpeg-turbo/libjpeg-turbo.git libjpeg-turbo-src
+fi
+
+# Build
+PREFIX="$DIR/build/prefix"
+mkdir -p "$DIR/build"
+
+cmake -S libjpeg-turbo-src -B "$DIR/build" \
+  -DCMAKE_BUILD_TYPE=MinSizeRel \
+  -DCMAKE_INTERPROCEDURAL_OPTIMIZATION=OFF \
+  -DCMAKE_INSTALL_PREFIX="$PREFIX" \
+  -DCMAKE_INSTALL_LIBDIR=lib \
+  -DENABLE_SHARED=OFF \
+  -DENABLE_STATIC=ON \
+  -DWITH_TURBOJPEG=OFF
+
+cmake --build "$DIR/build" -j"$NJOBS"
+cmake --install "$DIR/build"
+
+# Copy to package install dir
+rm -rf "$INSTALL_DIR"
+mkdir -p "$INSTALL_DIR"/{lib,include}
+
+# Library
+cp "$PREFIX/lib/libjpeg.a" "$INSTALL_DIR/lib/"
+
+# Headers
+cp "$PREFIX/include/jpeglib.h" "$INSTALL_DIR/include/"
+cp "$PREFIX/include/jconfig.h" "$INSTALL_DIR/include/"
+cp "$PREFIX/include/jerror.h" "$INSTALL_DIR/include/"
+cp "$PREFIX/include/jmorecfg.h" "$INSTALL_DIR/include/"
+
+# Clean up
+rm -rf libjpeg-turbo-src "$DIR/build"
+
+echo "Installed libjpeg to $INSTALL_DIR"
+du -sh "$INSTALL_DIR"

libjpeg/libjpeg/__init__.py

@@ -0,0 +1,10 @@
+import os
+
+DIR = os.path.join(os.path.dirname(__file__), "install")
+LIB_DIR = os.path.join(DIR, "lib")
+INCLUDE_DIR = os.path.join(DIR, "include")
+
+
+def smoketest():
+  assert os.path.isfile(os.path.join(LIB_DIR, "libjpeg.a")), "libjpeg.a not found"
+  assert os.path.isfile(os.path.join(INCLUDE_DIR, "jpeglib.h")), "jpeglib.h not found"

libjpeg/pyproject.toml

@@ -0,0 +1,15 @@
+[build-system]
+requires = ["setuptools>=64", "wheel"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "libjpeg"
+version = "3.1.0"
+description = "libjpeg-turbo JPEG library (static build)"
+requires-python = ">=3.8"
+
+[tool.setuptools.packages.find]
+include = ["libjpeg*"]
+
+[tool.setuptools.package-data]
+libjpeg = ["install/**/*"]

libjpeg/setup.py

@@ -0,0 +1,61 @@
+import os
+import platform
+import subprocess
+
+from setuptools.command.build_py import build_py
+
+try:
+  from wheel.bdist_wheel import bdist_wheel
+except ImportError:
+  bdist_wheel = None
+
+
+class BuildLibjpeg(build_py):
+  """Run build.sh to compile libjpeg-turbo before collecting package data."""
+
+  def run(self):
+    pkg_dir = os.path.dirname(os.path.abspath(__file__))
+    marker = os.path.join(pkg_dir, "libjpeg", "install", "lib", "libjpeg.a")
+
+    if not os.path.exists(marker):
+      build_script = os.path.join(pkg_dir, "build.sh")
+      subprocess.check_call(["bash", build_script], cwd=pkg_dir)
+
+    super().run()
+
+
+cmdclass = {"build_py": BuildLibjpeg}
+
+if bdist_wheel is not None:
+
+  class PlatformWheel(bdist_wheel):
+    """Produce a platform-specific, Python-version-agnostic wheel."""
+
+    def finalize_options(self):
+      super().finalize_options()
+      self.root_is_pure = False
+
+    def get_tag(self):
+      system = platform.system()
+      machine = platform.machine()
+
+      if system == "Linux":
+        plat = f"linux_{machine}"
+      elif system == "Darwin":
+        plat = "macosx_11_0_arm64"
+      else:
+        plat = f"{system.lower()}_{machine}"
+
+      return "py3", "none", plat
+
+  cmdclass["bdist_wheel"] = PlatformWheel
+
+
+def setup():
+  from setuptools import setup as _setup
+
+  _setup(cmdclass=cmdclass)
+
+
+if __name__ == "__main__":
+  setup()