# SS-124 - build config for the exact ffmpeg artifact Stack Stitch distributes.
#
# This file is the human-readable source of truth for what we ship. The pinned
# values here are mirrored by desktop/sidecars/stage-ffmpeg-macos.sh (keep both
# in sync when bumping) and enforced at build time by that script's assert_lgpl
# gate + the release pipeline (release-macos-dmg.sh).

# --- Pinned upstream source (the committable, reproducible checksum) ---------
FFMPEG_VERSION=7.1.1
FFMPEG_SRC_URL=https://ffmpeg.org/releases/ffmpeg-7.1.1.tar.xz
FFMPEG_SRC_SHA256=733984395e0dbbe5c046abda2dc49a5544e7e0e1e2366bba849222ae9e3a03b1

# --- License posture ---------------------------------------------------------
# LGPL-2.1-or-later ONLY. Configured WITHOUT --enable-gpl and WITHOUT
# --enable-nonfree. Audio uses FFmpeg's built-in AAC encoder (-c:a aac), which
# is LGPL. No external codec libraries (x264/fdk-aac/etc.) are linked.

# --- Exact configure invocation (per-arch; the non-host arch adds the cross
#     toolchain flags shown in stage-ffmpeg-macos.sh) --------------------------
#
# ./configure \
#   --disable-everything --disable-gpl --disable-nonfree \
#   --disable-doc --disable-htmlpages --disable-manpages --disable-podpages --disable-txtpages \
#   --disable-debug --disable-network --disable-autodetect --disable-x86asm --disable-shared --enable-static \
#   --disable-programs --enable-ffmpeg \
#   --enable-protocol=file,pipe \
#   --enable-demuxer=pcm_f32le \
#   --enable-muxer=mov,mp4,ipod \
#   --enable-decoder=pcm_f32le \
#   --enable-encoder=aac \
#   --enable-filter=aformat,pan,amerge,aresample,anull,abuffer,abuffersink \
#   --enable-parser=aac
#
# Rationale (scoped to mux_mic_and_loopback in audio_capture_macos.rs):
#   pcm_f32le demuxer+decoder  -> the two raw Float32 PCM inputs (-f f32le)
#   aformat/pan/amerge         -> mono-normalise mic (L) + downmix loopback (R) -> stereo
#   abuffer/abuffersink        -> -filter_complex graph endpoints
#   aac encoder                -> -c:a aac 192k (LGPL, built-in)
#   mov/mp4/ipod muxer         -> .m4a container with -movflags +faststart
#
# The resulting binary is ~2.5 MB per arch. Validated: this config muxes the
# exact Calls command against synthetic f32le PCM into a valid .m4a.