meta-offline-voice-agent: Enable layer for offline voice recognition

- This enables offline voice recognition in AGL
- Can successfully run vosk API and vosk websocket server

Changes:
- Create a new layer: meta-offline-voice-recognition
- Create recipes for the the Vosk library, API, websocket server and model
- Create feature template for the layer (agl-offline-voice-agent)
- Add all required packages to IMAGE_INSTALL
- ptest enable recipe python3-vosk-api
- Few fixes

Bug-AGL: SPEC-4497

Change-Id: Icb290ceee22e2c3a51cbd67f7431701795f1201b
Signed-off-by: amanarora_09 <aman.arora9848@gmail.com>

2 files changed, 87 insertions, 0 deletions

diff --git a/meta-offline-voice-agent/recipes-vosk/vosk-openfst/files/0001-build-fixes-for-bitbake.patch b/meta-offline-voice-agent/recipes-vosk/vosk-openfst/files/0001-build-fixes-for-bitbake.patch
new file mode 100644
index 00000000..fd3234c8
--- /dev/null
+++ b/meta-offline-voice-agent/recipes-vosk/vosk-openfst/files/0001-build-fixes-for-bitbake.patch
@@ -0,0 +1,64 @@
+From 8f5bc403c58af348d9671ca390c34cabde89a529 Mon Sep 17 00:00:00 2001
+From: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>
+Date: Sat, 9 Jul 2022 16:49:10 +0200
+Subject: [PATCH] build fixes for bitbake
+
+Signed-off-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>
+---
+ configure.ac | 36 +-----------------------------------
+ 1 file changed, 1 insertion(+), 35 deletions(-)
+
+diff --git a/configure.ac b/configure.ac
+index 9ab8824..316f719 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -5,7 +5,7 @@ AM_PROG_AR
+ AC_PROG_CXX
+ # This library does not throw exceptions, so we do not generate exception
+ # handling code. However, users are free to re-enable exception handling.
+-CXX="$CXX -std=c++17 -fno-exceptions -Wno-deprecated-declarations"
++#CXX="$CXX -std=c++17 -fno-exceptions -Wno-deprecated-declarations"
+ 
+ AC_DISABLE_STATIC
+ AC_PROG_LIBTOOL
+@@ -149,40 +149,6 @@ AC_ARG_WITH([libfstdir],
+ 
+ AC_SUBST([libfstdir], $with_libfstdir)
+ 
+-# Flags may be changed after configuring, so this is checked again by
+-# weight_test.cc.  The check here is to save time in the common case,
+-# or when someone does not run `make check`.
+-AC_RUN_IFELSE([AC_LANG_PROGRAM([
+-                 #include <cstdio>
+-
+-                 template <typename T>
+-                 bool FloatEqIsReflexive(T m) {
+-                   volatile T x = 1.111;
+-                   x *= m;
+-
+-                   T y = 1.111;
+-                   y *= m;
+-
+-                   return x == y;
+-                 }
+-               ], [
+-                 volatile double test_value = 1.1;
+-                 if (!FloatEqIsReflexive(static_cast<float>(test_value))) {
+-                   printf("float FAIL\n");
+-                   return 1;
+-                 }
+-                 if (!FloatEqIsReflexive(test_value)) {
+-                   printf("double FAIL\n");
+-                   return 1;
+-                 }
+-               ])],
+-              [echo "Float equality is good"],
+-              [AC_MSG_FAILURE(m4_normalize([
+-                   Test float equality failed!
+-                   Compile with -msse -mfpmath=sse if using g++.
+-              ]))],
+-              [echo "Ignoring test for cross-compilation"])
+-
+ AC_CHECK_LIB([dl], dlopen, [DL_LIBS=-ldl])
+ AC_SUBST([DL_LIBS])
+ 
diff --git a/meta-offline-voice-agent/recipes-vosk/vosk-openfst/vosk-openfst_1.8.0.bb b/meta-offline-voice-agent/recipes-vosk/vosk-openfst/vosk-openfst_1.8.0.bb
new file mode 100644
index 00000000..c7e07bfe
--- /dev/null
+++ b/meta-offline-voice-agent/recipes-vosk/vosk-openfst/vosk-openfst_1.8.0.bb
@@ -0,0 +1,23 @@
+DESCRIPTION = "OpenFst is a library for constructing, combining, optimizing, and searching weighted finite-state transducers (FSTs)."
+SUMMARY = "Openfst mirror with some fixes"
+HOMEPAGE = "https://github.com/alphacep/openfst"
+LICENSE = "Apache-2.0"
+LIC_FILES_CHKSUM = "file://COPYING;md5=973381090441f4eb420224655e05e064"
+
+SRC_URI = "git://github.com/alphacep/openfst.git;protocol=https;branch=master \
+           file://0001-build-fixes-for-bitbake.patch \
+           "
+
+SRCREV = "7dfd808194105162f20084bb4d8e4ee4b65266d5"
+S = "${WORKDIR}/git"
+
+inherit autotools python3native
+
+# Specify any options you want to pass to the configure script using EXTRA_OECONF:
+EXTRA_OECONF = "--enable-static --enable-shared --enable-far --enable-ngram-fsts --enable-lookahead-fsts --with-pic --disable-bin"
+
+FILES:${PN} += " /usr/lib/fst   /usr/lib/fst/arc_lookahead-fst.so \
+  /usr/lib/fst/ilabel_lookahead-fst.so \
+  /usr/lib/fst/ngram-fst.so \
+  /usr/lib/fst/olabel_lookahead-fst.so \
+"