orc を Homebrew でインストール

プロジェクトリンク

• ホームページ

コマンドとエイリアス

• orc-bugreport
• orcc

プロジェクトの歴史

The ORC README calls ORC the successor to Liboil, the Library of Optimized Inner Loops. Liboil provided hand-optimized inner loops; ORC moved that idea toward a restricted assembly-like language that can be compiled at runtime, emitted as assembly source, extended with new opcodes, or emulated for testing.

ORC's design addressed a common multimedia problem: high-throughput audio and video filters need CPU-vectorized loops across several architectures, but handwritten intrinsics multiply code paths and runtime combinations. The README says ORC targets SIMD-style operations such as saturated addition and subtraction, with backends including SSE, MMX, MIPS, Altivec, NEON, and TI C64x+.

採用の歴史

GStreamer adopted ORC as part of its multimedia stack and hosts the project page under the GStreamer site. GStreamer describes it as a library and tools for compiling SIMD assembly-language-like programs over arrays of data, maintained by the GStreamer Team.

A GStreamer 0.4.42 release announcement says liborc is used for SIMD acceleration in plugins including `audioconvert`, `audiomixer`, `compositor`, `videoscale`, and `videoconvert`. That places ORC under everyday desktop and media-pipeline workloads even when end users never call `orcc` directly.

使われ方

Library users describe kernels in ORC's small language, then let ORC generate target-specific code or run an emulated fallback. The README frames this as useful when a program needs vector extensions directly from an application, wants assembly output without linking the ORC runtime, or needs runtime-defined functions that ordinary compiler intrinsics cannot produce.

`orcc` is the developer-facing compiler tool. Downstream packages mostly care about the shared library because GStreamer plugins and similar media code depend on it for fast pixel, sample, and buffer transformations.

パッケージ好きにとっての重要性

For package nerds, ORC is a quiet dependency with a clear reason to exist: it lets multimedia packages ship portable SIMD acceleration without carrying a bespoke assembly implementation for every CPU family. It also explains why a tiny compiler package appears as a dependency of much larger audio and video stacks.

タイムライン

• Liboil era: ORC's README identifies ORC as the successor to the Library of Optimized Inner Loops.
• 0.4 series: The README states that ORC 0.4 releases maintain API and ABI compatibility inside the series.
• 2026-01-08: GStreamer announced ORC 0.4.42 and named several GStreamer plugins that use liborc for SIMD acceleration.

Related projects

• ORC is historically related to Liboil and operationally related to GStreamer. Its problem space overlaps compiler auto-vectorization, handwritten SIMD intrinsics, and architecture-specific assembly, but it takes a small domain-specific runtime compiler approach.

ソース

• https://archlinux.org/packages/extra/x86_64/orc/
• https://discourse.gstreamer.org/t/orc-0-4-42-release/5592
• https://formulae.brew.sh/formula/orc
• https://github.com/GStreamer/orc
• https://gstreamer.freedesktop.org/modules/orc.html