Install the LV2 host probe; drop openmixer's measurer copy

.github/workflows/ci.yml

@@ -34,8 +34,7 @@ jobs:
         run: pnpm install --frozen-lockfile
 
       # the CLAP prober, the LV2 measurer, their interposer and the fixture plugins the tests qualify;
-      # deps/ also holds openmixer's copy of the measurer, which the parity test runs beside ours, and
-      # omx-clap-core's LV2 feature provider at the packages' floor, built for the measurer to link
+      # deps/ also holds omx-clap-core's LV2 feature provider at the packages' floor, built for the measurer to link
       # asan: the measurer under AddressSanitizer, which the leak check runs
       - name: Build the native tools
         run: |

BUILDING.md

@@ -34,25 +34,21 @@ Its host features are omx-clap-core's LV2 feature provider, the static `libomx-c
 header: `pkg-config omx-clap-lv2` (`omx-clap-lv2-devel`, `libomx-clap-lv2-dev`), else `make deps`
 fetches omx-clap-core at the packages' floor, builds the archive against the fetched CLAP headers and
 installs it into `native/deps/omx-clap-lv2`.
-That header is also what openmixer's copy of the LV2 measurer reads (kept in
-`native/parity/openmixer` as it was at the commit it was taken from, each file's blob id in `BLOBS`),
-so the build carries that copy, `native/build/parity/lv2_measure`, beside ours:
 
 ```
 make -C native deps all   # native/build/clap-qualify, lv2_measure, rt_interpose.so, fixtures/
 ```
 
-The native tests run the build; without it they skip, except on CI, where a missing build fails. The
-parity test runs both LV2 measurers on the fixture bundles and wants the same bytes from each, once
-the three things only ours prints are taken out of its line: the `host` object, the
-`featureOptions` object and the soak's `maxRmsDbfs` (the soak case lifts the sweep's bound, so both
-sweep the same range).
+The native tests run the build; without it they skip, except on CI, where a missing build fails.
 `make -C native asan` builds the measurer under AddressSanitizer, `native/build/asan/lv2_measure`,
 which the leak check runs on every way out of it (a measurement, a soak, a plugin that will not
 instantiate). It is not part of `all`, so a package build needs no libasan.
 
-`make -C native install DESTDIR=... LIBEXECDIR=...` installs the prober, the measurer and the
-interposer (not the fixtures): exactly `NATIVE_TOOLS` in `src/qualify-declarations.ts`. The command
+`make -C native install DESTDIR=... LIBEXECDIR=...` installs the prober, the measurer, the
+interposer and the LV2 host probe (not the fixtures): exactly `NATIVE_TOOLS` in
+`src/qualify-declarations.ts`. The host probe (`lv2_host_probe <bundle> [uri]`) loads a worker plugin
+through lilv and drives it as a host does, so a console that exports an LV2 plugin tests that
+plugin's host-facing half with it. The command
 and `tools/lv2-measure.mjs` look for each by its setting (`OMX_CLAP_QUALIFY`, `OMX_LV2_MEASURE`,
 `OMX_RT_INTERPOSE`), then in `native/build/`, then in the directories the packages install into
 (`NATIVE_TOOL_DIRS`). An installed package has no `native/build/`; in a checkout, its own build wins

native/Makefile

@@ -14,9 +14,8 @@
 #   make -C native deps      fetch the CLAP and plugin-hostd headers at the pinned tags into deps/, the
 #                            omx-contract header the LV2 measurer reads its rates from, and omx-clap-core's
 #                            LV2 feature provider (libomx-clap-lv2), built and installed into deps/
-#   build/parity/lv2_measure openmixer's LV2 measurer (parity/openmixer, kept as it was there), built with
-#                            these flags when deps/ holds that header: the parity test runs it beside ours
-#   make -C native install DESTDIR=... LIBEXECDIR=...   the prober, the measurer and the interposer, for a package
+#   make -C native install DESTDIR=... LIBEXECDIR=...   the prober, the measurer, the interposer and the LV2 host
+#                            probe, for a package
 #
 # The CLAP headers come from `pkg-config clap` (Fedora clap-devel), else deps/clap; plugin-hostd's pin
 # header from `pkg-config plugin-hostd` (plugin-hostd-devel), else deps/plugin-hostd. omx-contract's limits
@@ -30,8 +29,8 @@ BUILD ?= build
 
 CLAP_REF := 1.2.6
 PLUGIN_HOSTD_REF := v0.1.4
-# the omx-contract `make deps` fetches where no omx-contract-devel is installed: the packages' floor, so both builds
-# read the same contract. The rates are the same in 2.3.0, which openmixer's copy (parity/openmixer/BLOBS) was built against.
+# the omx-contract `make deps` fetches where no omx-contract-devel is installed: the packages' floor, so the build
+# reads the contract the packages do.
 OMX_CONTRACT_VERSION := 2.10.1
 # the omx-clap-core whose LV2 feature provider `make deps` builds where no omx-clap-lv2-devel is installed: the
 # packages' floor
@@ -82,8 +81,6 @@ all: $(BUILD)/clap-qualify $(BUILD)/lv2_measure $(BUILD)/lv2_host_probe $(BUILD)
 	$(BUILD)/fixtures/fail-alloc.so \
 	$(BUILD)/fixtures/lv2/rt-safe.lv2/gain.so $(BUILD)/fixtures/lv2/rt-unsafe.lv2/gain.so \
 	$(BUILD)/fixtures/lv2/host-faithfulness.lv2/host-faithfulness.so
-	@# asked when the recipe runs, so `make deps all` builds it from what deps just fetched
-	@if [ -f deps/omx-contract/include/omxcontract/omx_contract_limits.h ]; then $(MAKE) --no-print-directory $(BUILD)/parity/lv2_measure; fi
 
 $(BUILD) $(BUILD)/fixtures:
 	mkdir -p $@
@@ -94,8 +91,6 @@ $(BUILD)/clap-qualify: clap-qualify.c rt-interpose.h | $(BUILD)
 
 LV2_MEASURE_SRC := lv2-measure.c lv2-measure-options.c lv2-measure-pin.c
 LV2_MEASURE_HDR := lv2-measure-options.h lv2-measure-pin.h rt-interpose.h
-# openmixer's copy, as it was taken: its own features unit
-PARITY_SRC := lv2-measure.c lv2-measure-features.c lv2-measure-pin.c
 
 # as openmixer built it: no FMA contraction, so a figure is the same on every architecture and compiler
 $(BUILD)/lv2_measure: $(LV2_MEASURE_SRC) $(LV2_MEASURE_HDR) | $(BUILD)
@@ -115,12 +110,6 @@ $(BUILD)/lv2_measure_options_test: lv2_measure_options.test.c lv2-measure-option
 	$(CC) $(CPPFLAGS) $(CFLAGS) -Werror $(OMX_CLAP_LV2_CFLAGS) $(LV2_CFLAGS) -I. $(LDFLAGS) -o $@ lv2_measure_options.test.c \
 		lv2-measure-options.c $(OMX_CLAP_LV2_LIBS) -ldl -lpthread
 
-# named lv2_measure too: the measurer leaves frames of its own binary, by that name, out of an event's owner
-$(BUILD)/parity/lv2_measure: $(addprefix parity/openmixer/,$(PARITY_SRC)) parity/omx_console_limits.h | $(BUILD)
-	mkdir -p $(@D)
-	$(CC) $(CPPFLAGS) $(CFLAGS) -ffp-contract=off -Iparity -Ideps/omx-contract/include $(PLUGIN_HOSTD_CFLAGS) \
-		$(LILV_CFLAGS) $(LDFLAGS) -o $@ $(addprefix parity/openmixer/,$(PARITY_SRC)) $(LILV_LIBS) -lpthread -lm -ldl
-
 $(BUILD)/lv2_host_probe: lv2-host-probe.c | $(BUILD)
 	$(CC) $(CPPFLAGS) $(CFLAGS) $(LILV_CFLAGS) $(LDFLAGS) -o $@ $< $(LILV_LIBS) -lpthread -lm
 
@@ -179,11 +168,12 @@ deps:
 
 # the fixtures are the tests' own, never installed; the interposer is executable so rpm strips it (dh_fixperms clears the bit)
 # exactly src/qualify-declarations.ts's NATIVE_TOOLS (src/native-install-dirs.test.ts holds the two together)
-install: $(BUILD)/clap-qualify $(BUILD)/lv2_measure $(BUILD)/rt_interpose.so
+install: $(BUILD)/clap-qualify $(BUILD)/lv2_measure $(BUILD)/rt_interpose.so $(BUILD)/lv2_host_probe
 	install -d $(DESTDIR)$(LIBEXECDIR)
 	install -m 0755 $(BUILD)/clap-qualify $(DESTDIR)$(LIBEXECDIR)/clap-qualify
 	install -m 0755 $(BUILD)/lv2_measure $(DESTDIR)$(LIBEXECDIR)/lv2_measure
 	install -m 0755 $(BUILD)/rt_interpose.so $(DESTDIR)$(LIBEXECDIR)/rt_interpose.so
+	install -m 0755 $(BUILD)/lv2_host_probe $(DESTDIR)$(LIBEXECDIR)/lv2_host_probe
 
 clean:
 	rm -rf $(BUILD)

native/fetch-deps.sh

@@ -3,8 +3,8 @@
 # Copyright (C) 2026 Pau Aliagas <linuxnow@gmail.com>
 #
 # The headers the prober builds against, each at a release tag: the CLAP SDK and plugin-hostd (its pin.h).
-# The omx-contract C header both LV2 measurers (ours and openmixer's copy, parity/openmixer) read their
-# rates from, at the version the packages require, for a build with no omx-contract-devel installed.
+# The omx-contract C header the LV2 measurer reads its rates from, at the version the packages require,
+# for a build with no omx-contract-devel installed.
 # omx-clap-core's LV2 feature provider, the static libomx-clap-lv2 and its header, at the version the
 # packages require, built against the fetched CLAP headers and installed into <dir>/omx-clap-lv2, for a
 # build with no omx-clap-lv2-devel installed.