Audio capture and streaming app for webOS 5/6
Captures the TV's audio and sends it out over several transports. The
primary one is HyperHDR: RTP/L16 to a host-side loopback device, since
HyperHDR has no network audio input of its own. A second route renders
the spectrum on the TV and sends FlatBuffers images to port 19400
instead, for setups where touching the host's sound config is not an
option.
native/ the service: capture backends (PulseAudio, ALSA, exec,
test tone, all dlopen-based), DSP, and one file per sink
frontend/ D-pad driven UI at a fixed 1920x1080
servicefiles/ native service manifest plus the boot script
host/ RTP receiver and the loopback installer for the HyperHDR
machine
tools/ build/package, asset generation, Homebrew Channel
manifest, on-TV probe
test/ host-side suites: FlatBuffers and RTP verified against
real decoders, the engine end to end, the page in jsdom
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
This commit is contained in:
Rene Kievits
Executable
+187
@@ -0,0 +1,187 @@
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#!/usr/bin/env bash
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# Builds the native service, assembles the package layout and produces the ipk.
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#
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# ./tools/build.sh # native + stage + package
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# ./tools/build.sh native # cross-compile the service only
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# ./tools/build.sh package # assemble and run ares-package
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# ./tools/build.sh install # ares-install the ipk on the TV
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# ./tools/build.sh launch # ares-launch the app
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# ./tools/build.sh logs # tail the service log over ssh
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# ./tools/build.sh clean
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#
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# Needs the webOS NDK (arm-webos-linux-gnueabi buildroot SDK) for the native
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# part and ares-cli for the packaging part. Point WEBOS_SDK at the SDK if it is
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# not in the usual place; set DEVICE to the ares device name (default: tv).
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set -euo pipefail
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ROOT="$(cd "$(dirname "$0")/.." && pwd)"
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cd "$ROOT"
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APP_ID=org.webosbrew.audiocap
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SERVICE_ID=$APP_ID.service
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BINARY=audiocap-service
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WEBOS_SDK="${WEBOS_SDK:-$HOME/arm-webos-linux-gnueabi_sdk-buildroot}"
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DEVICE="${DEVICE:-tv}"
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BUILD_DIR="$ROOT/build"
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STAGE_APP="$BUILD_DIR/stage/app"
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STAGE_SERVICE="$BUILD_DIR/stage/service"
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OUT_DIR="$ROOT/out"
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say() { printf '%s\n' "$*"; }
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step() { printf '\n== %s\n' "$*"; }
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die() { printf 'error: %s\n' "$*" >&2; exit 1; }
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version() {
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python3 - "$ROOT/frontend/appinfo.json" <<'EOF'
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import json, sys
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print(json.load(open(sys.argv[1]))["version"])
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EOF
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}
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check_sdk() {
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local toolchain="$WEBOS_SDK/share/buildroot/toolchainfile.cmake"
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if [ ! -f "$toolchain" ]; then
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cat >&2 <<EOF
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error: no webOS SDK at $WEBOS_SDK
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Download and unpack the buildroot NDK, then point WEBOS_SDK at it:
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https://github.com/openlgtv/buildroot-nc4/releases
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tar xf arm-webos-linux-gnueabi_sdk-buildroot.tar.gz -C \$HOME
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\$HOME/arm-webos-linux-gnueabi_sdk-buildroot/relocate-sdk.sh
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WEBOS_SDK=\$HOME/arm-webos-linux-gnueabi_sdk-buildroot ./tools/build.sh
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EOF
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exit 1
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fi
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command -v cmake >/dev/null 2>&1 || die "cmake is not installed"
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echo "$toolchain"
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}
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check_ares() {
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command -v ares-package >/dev/null 2>&1 || cat >&2 <<'EOF'
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error: ares-package is not on PATH
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npm install -g @webosose/ares-cli
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Then register the TV once (developer mode or the Homebrew Channel's ssh):
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ares-setup-device --add tv --info "{'host':'192.168.1.20','port':9922,'username':'root'}"
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EOF
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command -v ares-package >/dev/null 2>&1
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}
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build_native() {
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local toolchain
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toolchain="$(check_sdk)"
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step "Cross-compiling the service"
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cmake -S native -B "$BUILD_DIR/native" \
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-DCMAKE_TOOLCHAIN_FILE="$toolchain" \
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-DCMAKE_BUILD_TYPE=Release
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cmake --build "$BUILD_DIR/native" --parallel
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local binary="$BUILD_DIR/native/$BINARY"
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[ -f "$binary" ] || die "the build produced no $BINARY"
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say "built $binary"
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file "$binary" 2>/dev/null | sed 's/^/ /' || true
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}
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stage() {
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step "Staging the package"
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rm -rf "$BUILD_DIR/stage"
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mkdir -p "$STAGE_APP" "$STAGE_SERVICE"
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cp -R "$ROOT/frontend/." "$STAGE_APP/"
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# The mock only exists so the UI can be opened in a desktop browser.
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rm -f "$STAGE_APP/js/mock.js"
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python3 - "$STAGE_APP/index.html" <<'EOF'
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import re, sys
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path = sys.argv[1]
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html = open(path).read()
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html = re.sub(r'\s*<script src="js/mock\.js"></script>', '', html)
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open(path, "w").write(html)
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EOF
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cp "$ROOT/servicefiles/services.json" "$STAGE_SERVICE/"
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cp "$ROOT/servicefiles/package.json" "$STAGE_SERVICE/"
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cp "$ROOT/servicefiles/audiocapautostart" "$STAGE_SERVICE/"
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chmod +x "$STAGE_SERVICE/audiocapautostart"
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local binary="$BUILD_DIR/native/$BINARY"
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[ -f "$binary" ] || die "no service binary; run './tools/build.sh native' first"
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cp "$binary" "$STAGE_SERVICE/$BINARY"
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chmod +x "$STAGE_SERVICE/$BINARY"
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say "app: $STAGE_APP"
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say "service: $STAGE_SERVICE"
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}
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package() {
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check_ares || exit 1
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step "Packaging"
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mkdir -p "$OUT_DIR"
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rm -f "$OUT_DIR"/${APP_ID}_*.ipk
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ares-package "$STAGE_APP" "$STAGE_SERVICE" -o "$OUT_DIR"
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local ipk
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ipk="$(ls -t "$OUT_DIR"/${APP_ID}_*.ipk | head -1)"
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say ""
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say "$ipk"
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if command -v sha256sum >/dev/null 2>&1; then
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sha256sum "$ipk" | sed 's/^/ sha256 /'
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elif command -v shasum >/dev/null 2>&1; then
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shasum -a 256 "$ipk" | sed 's/^/ sha256 /'
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fi
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}
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latest_ipk() {
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ls -t "$OUT_DIR"/${APP_ID}_*.ipk 2>/dev/null | head -1
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}
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install_ipk() {
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local ipk
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ipk="$(latest_ipk)" || true
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[ -n "$ipk" ] || die "no ipk in $OUT_DIR; run './tools/build.sh' first"
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step "Installing $ipk on device '$DEVICE'"
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ares-install --device "$DEVICE" "$ipk"
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say ""
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say "The service needs root to reach the TV's audio devices. Either open the"
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say "app and press 'Grant root access', or run it here:"
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say " ares-shell --device $DEVICE -r \\"
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say " '/media/developer/apps/usr/palm/services/org.webosbrew.hbchannel.service/elevate-service $SERVICE_ID'"
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}
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launch() {
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step "Launching on '$DEVICE'"
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ares-launch --device "$DEVICE" "$APP_ID"
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}
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logs() {
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step "Service log from '$DEVICE' (ctrl-c to stop)"
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# The service keeps its own ring buffer, but journald/pmlog has the crashes.
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ares-shell --device "$DEVICE" -r \
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"tail -f /var/log/messages 2>/dev/null | grep -i audiocap || journalctl -f | grep -i audiocap"
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}
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clean() {
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step "Cleaning"
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rm -rf "$BUILD_DIR" "$OUT_DIR"
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say "removed build/ and out/"
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}
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case "${1:-all}" in
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all) build_native; stage; package ;;
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native) build_native ;;
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stage) stage ;;
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package) stage; package ;;
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install) install_ipk ;;
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launch) launch ;;
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logs) logs ;;
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clean) clean ;;
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version) version ;;
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-h|--help)
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awk 'NR == 1 { next } /^#/ { sub(/^# ?/, ""); print; next } { exit }' "$0" ;;
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*) die "unknown command '$1' (try --help)" ;;
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esac
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