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>

12 files changed, 519 insertions, 0 deletions

diff --git a/meta-offline-voice-agent/recipes-vosk/vosk-kaldi/vosk-kaldi/0001-Build-fix-for-include-in-makefile.patch b/meta-offline-voice-agent/recipes-vosk/vosk-kaldi/vosk-kaldi/0001-Build-fix-for-include-in-makefile.patch
new file mode 100644
index 00000000..8c67aba7
--- /dev/null
+++ b/meta-offline-voice-agent/recipes-vosk/vosk-kaldi/vosk-kaldi/0001-Build-fix-for-include-in-makefile.patch
@@ -0,0 +1,25 @@
+From 29caad5ea644875d7d896836d5c8c67a711b4352 Mon Sep 17 00:00:00 2001
+From: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>
+Date: Wed, 13 Jul 2022 15:52:29 +0000
+Subject: [PATCH] Build fix for include in makefile
+
+There is a conflict when using -isystem and bitbake's own flags.
+
+Signed-off-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>
+---
+ src/makefiles/linux_openblas.mk | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/makefiles/linux_openblas.mk b/src/makefiles/linux_openblas.mk
+index 1ac67c355..bb15f84a5 100644
+--- a/src/makefiles/linux_openblas.mk
++++ b/src/makefiles/linux_openblas.mk
+@@ -19,7 +19,7 @@ ifndef OPENBLASLIBS
+ $(error OPENBLASLIBS not defined.)
+ endif
+ 
+-CXXFLAGS = -std=c++17 -I.. -isystem $(OPENFSTINC) -O1 $(EXTRA_CXXFLAGS) \
++CXXFLAGS = -std=c++17 -I.. -I $(OPENFSTINC) -O1 $(EXTRA_CXXFLAGS) \
+            -Wall -Wno-sign-compare -Wno-unused-local-typedefs \
+            -Wno-deprecated-declarations -Winit-self \
+            -DKALDI_DOUBLEPRECISION=$(DOUBLE_PRECISION) \
diff --git a/meta-offline-voice-agent/recipes-vosk/vosk-kaldi/vosk-kaldi/0001-Enforce-cross-compilation-under-bitbake.patch b/meta-offline-voice-agent/recipes-vosk/vosk-kaldi/vosk-kaldi/0001-Enforce-cross-compilation-under-bitbake.patch
new file mode 100644
index 00000000..d1fb4836
--- /dev/null
+++ b/meta-offline-voice-agent/recipes-vosk/vosk-kaldi/vosk-kaldi/0001-Enforce-cross-compilation-under-bitbake.patch
@@ -0,0 +1,23 @@
+From 47f7b9dec92f52e3bd7d497326a2e5d28e3cf10c Mon Sep 17 00:00:00 2001
+From: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>
+Date: Mon, 11 Jul 2022 16:50:23 +0200
+Subject: [PATCH] Enforce cross-compilation under bitbake
+
+Signed-off-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>
+---
+ src/configure | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/configure b/src/configure
+index c74d67af8..2aaf541c3 100755
+--- a/src/configure
++++ b/src/configure
+@@ -232,7 +232,7 @@ You need $supported_compiler."
+ 
+ function check_for_slow_expf {
+   # We cannot run this test if we are cross compiling.
+-  if [[ "$TARGET_ARCH" == "`uname -m`" ]] ; then
++  if false ; then
+     ( cd probe
+       rm -f exp-test
+       make -f Makefile.slow_expf 1>/dev/null
diff --git a/meta-offline-voice-agent/recipes-vosk/vosk-kaldi/vosk-kaldi/0001-Fixes-for-shared-library-compilation.patch b/meta-offline-voice-agent/recipes-vosk/vosk-kaldi/vosk-kaldi/0001-Fixes-for-shared-library-compilation.patch
new file mode 100644
index 00000000..fb93a356
--- /dev/null
+++ b/meta-offline-voice-agent/recipes-vosk/vosk-kaldi/vosk-kaldi/0001-Fixes-for-shared-library-compilation.patch
@@ -0,0 +1,95 @@
+From 4fc5d1df4dca9b7faaf630d43b32a85d80d16eb3 Mon Sep 17 00:00:00 2001
+From: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>
+Date: Thu, 14 Jul 2022 11:00:07 +0000
+Subject: [PATCH] Fixes for shared library compilation
+
+Signed-off-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>
+---
+ src/configure                   | 2 +-
+ src/fstbin/Makefile             | 3 ++-
+ src/latbin/Makefile             | 3 ++-
+ src/makefiles/linux_openblas.mk | 2 +-
+ src/matrix/Makefile             | 2 +-
+ src/rnnlmbin/Makefile           | 2 +-
+ 6 files changed, 8 insertions(+), 6 deletions(-)
+
+diff --git a/src/configure b/configure
+index c74d67af8..2aaf541c3 100755
+--- a/configure
++++ b/configure
+@@ -232,7 +232,7 @@ You need $supported_compiler."
+ 
+ function check_for_slow_expf {
+   # We cannot run this test if we are cross compiling.
+-  if [[ "$TARGET_ARCH" == "`uname -m`" ]] ; then
++  if false ; then
+     ( cd probe
+       rm -f exp-test
+       make -f Makefile.slow_expf 1>/dev/null
+diff --git a/fstbin/Makefile b/fstbin/Makefile
+index a22c014a7..5a29030c3 100644
+--- a/fstbin/Makefile
++++ b/fstbin/Makefile
+@@ -26,6 +26,7 @@ TESTFILES =
+ LIBFILE =
+ 
+ ADDLIBS = ../decoder/kaldi-decoder.a ../fstext/kaldi-fstext.a \
+-          ../util/kaldi-util.a ../matrix/kaldi-matrix.a ../base/kaldi-base.a 
++          ../util/kaldi-util.a ../matrix/kaldi-matrix.a ../base/kaldi-base.a \
++          ../hmm/kaldi-hmm.a ../lat/kaldi-lat.a ../tree/kaldi-tree.a
+ 
+ include ../makefiles/default_rules.mk
+diff --git a/latbin/Makefile b/latbin/Makefile
+index d5cc4d035..902bf1058 100644
+--- a/latbin/Makefile
++++ b/latbin/Makefile
+@@ -36,6 +36,7 @@ TESTFILES =
+ ADDLIBS = ../rnnlm/kaldi-rnnlm.a ../nnet3/kaldi-nnet3.a \
+           ../cudamatrix/kaldi-cudamatrix.a ../lat/kaldi-lat.a ../lm/kaldi-lm.a \
+           ../fstext/kaldi-fstext.a ../hmm/kaldi-hmm.a ../tree/kaldi-tree.a \
+-          ../util/kaldi-util.a ../matrix/kaldi-matrix.a ../base/kaldi-base.a 
++          ../util/kaldi-util.a ../matrix/kaldi-matrix.a ../base/kaldi-base.a \
++          ../chain/kaldi-chain.a ../decoder/kaldi-decoder.a
+ 
+ include ../makefiles/default_rules.mk
+diff --git a/makefiles/linux_openblas.mk b/makefiles/linux_openblas.mk
+index 1ac67c355..bb15f84a5 100644
+--- a/makefiles/linux_openblas.mk
++++ b/makefiles/linux_openblas.mk
+@@ -19,7 +19,7 @@ ifndef OPENBLASLIBS
+ $(error OPENBLASLIBS not defined.)
+ endif
+ 
+-CXXFLAGS = -std=c++17 -I.. -isystem $(OPENFSTINC) -O1 $(EXTRA_CXXFLAGS) \
++CXXFLAGS = -std=c++17 -I.. -I $(OPENFSTINC) -O1 $(EXTRA_CXXFLAGS) \
+            -Wall -Wno-sign-compare -Wno-unused-local-typedefs \
+            -Wno-deprecated-declarations -Winit-self \
+            -DKALDI_DOUBLEPRECISION=$(DOUBLE_PRECISION) \
+diff --git a/matrix/Makefile b/matrix/Makefile
+index 398179a35..bec14e089 100644
+--- a/matrix/Makefile
++++ b/matrix/Makefile
+@@ -10,7 +10,7 @@ include ../kaldi.mk
+ 
+ # you can uncomment matrix-lib-speed-test if you want to do the speed tests.
+ 
+-TESTFILES = matrix-lib-test sparse-matrix-test numpy-array-test #matrix-lib-speed-test
++#TESTFILES = matrix-lib-test sparse-matrix-test numpy-array-test #matrix-lib-speed-test
+ 
+ OBJFILES = kaldi-matrix.o kaldi-vector.o packed-matrix.o sp-matrix.o tp-matrix.o \
+            matrix-functions.o qr.o srfft.o compressed-matrix.o \
+diff --git a/rnnlmbin/Makefile b/rnnlmbin/Makefile
+index 23a8eba61..d801b90d8 100644
+--- a/rnnlmbin/Makefile
++++ b/rnnlmbin/Makefile
+@@ -21,6 +21,6 @@ ADDLIBS = ../rnnlm/kaldi-rnnlm.a ../nnet3/kaldi-nnet3.a \
+           ../lat/kaldi-lat.a ../lm/kaldi-lm.a ../fstext/kaldi-fstext.a \
+           ../hmm/kaldi-hmm.a ../transform/kaldi-transform.a ../gmm/kaldi-gmm.a \
+           ../tree/kaldi-tree.a ../util/kaldi-util.a ../matrix/kaldi-matrix.a \
+-          ../base/kaldi-base.a 
++          ../base/kaldi-base.a ../chain/kaldi-chain.a
+ 
+ include ../makefiles/default_rules.mk
+-- 
+2.33.0
+
diff --git a/meta-offline-voice-agent/recipes-vosk/vosk-kaldi/vosk-kaldi/OLD/0001-Build-fix-for-include-in-makefile.patch b/meta-offline-voice-agent/recipes-vosk/vosk-kaldi/vosk-kaldi/OLD/0001-Build-fix-for-include-in-makefile.patch
new file mode 100644
index 00000000..8c67aba7
--- /dev/null
+++ b/meta-offline-voice-agent/recipes-vosk/vosk-kaldi/vosk-kaldi/OLD/0001-Build-fix-for-include-in-makefile.patch
@@ -0,0 +1,25 @@
+From 29caad5ea644875d7d896836d5c8c67a711b4352 Mon Sep 17 00:00:00 2001
+From: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>
+Date: Wed, 13 Jul 2022 15:52:29 +0000
+Subject: [PATCH] Build fix for include in makefile
+
+There is a conflict when using -isystem and bitbake's own flags.
+
+Signed-off-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>
+---
+ src/makefiles/linux_openblas.mk | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/makefiles/linux_openblas.mk b/src/makefiles/linux_openblas.mk
+index 1ac67c355..bb15f84a5 100644
+--- a/src/makefiles/linux_openblas.mk
++++ b/src/makefiles/linux_openblas.mk
+@@ -19,7 +19,7 @@ ifndef OPENBLASLIBS
+ $(error OPENBLASLIBS not defined.)
+ endif
+ 
+-CXXFLAGS = -std=c++17 -I.. -isystem $(OPENFSTINC) -O1 $(EXTRA_CXXFLAGS) \
++CXXFLAGS = -std=c++17 -I.. -I $(OPENFSTINC) -O1 $(EXTRA_CXXFLAGS) \
+            -Wall -Wno-sign-compare -Wno-unused-local-typedefs \
+            -Wno-deprecated-declarations -Winit-self \
+            -DKALDI_DOUBLEPRECISION=$(DOUBLE_PRECISION) \
diff --git a/meta-offline-voice-agent/recipes-vosk/vosk-kaldi/vosk-kaldi/OLD/0001-Enforce-cross-compilation-under-bitbake.patch b/meta-offline-voice-agent/recipes-vosk/vosk-kaldi/vosk-kaldi/OLD/0001-Enforce-cross-compilation-under-bitbake.patch
new file mode 100644
index 00000000..d1fb4836
--- /dev/null
+++ b/meta-offline-voice-agent/recipes-vosk/vosk-kaldi/vosk-kaldi/OLD/0001-Enforce-cross-compilation-under-bitbake.patch
@@ -0,0 +1,23 @@
+From 47f7b9dec92f52e3bd7d497326a2e5d28e3cf10c Mon Sep 17 00:00:00 2001
+From: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>
+Date: Mon, 11 Jul 2022 16:50:23 +0200
+Subject: [PATCH] Enforce cross-compilation under bitbake
+
+Signed-off-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>
+---
+ src/configure | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/configure b/src/configure
+index c74d67af8..2aaf541c3 100755
+--- a/src/configure
++++ b/src/configure
+@@ -232,7 +232,7 @@ You need $supported_compiler."
+ 
+ function check_for_slow_expf {
+   # We cannot run this test if we are cross compiling.
+-  if [[ "$TARGET_ARCH" == "`uname -m`" ]] ; then
++  if false ; then
+     ( cd probe
+       rm -f exp-test
+       make -f Makefile.slow_expf 1>/dev/null
diff --git a/meta-offline-voice-agent/recipes-vosk/vosk-kaldi/vosk-kaldi_git.bb b/meta-offline-voice-agent/recipes-vosk/vosk-kaldi/vosk-kaldi_git.bb
new file mode 100644
index 00000000..b3e021f3
--- /dev/null
+++ b/meta-offline-voice-agent/recipes-vosk/vosk-kaldi/vosk-kaldi_git.bb
@@ -0,0 +1,63 @@
+SUMMARY = "Kaldi Speech Recognition Toolkit"
+HOMEPAGE = "http://kaldi-asr.org/"
+LICENSE = "Apache-2.0"
+LIC_FILES_CHKSUM = "file://../COPYING;md5=a10e448a64dbd3723ff3fb2f397fba2e \
+                    file://doc/legal.dox;md5=3cba845003f27e67da70faa5da924c1e"
+
+SRC_URI = "git://github.com/alphacep/kaldi.git;protocol=https;branch=vosk \
+           file://0001-Fixes-for-shared-library-compilation.patch \
+           "
+
+PV = "1.0+git${SRCPV}"
+SRCREV = "76cd51d44c0a61e3905c35cadb2ec5f54f3e42d1"
+
+S = "${WORKDIR}/git/src"
+
+DEPENDS += "openblas vosk-openfst"
+inherit python3native
+
+ALLOW_EMPTY_${PN} = "1"
+
+MYCONF = "--mathlib=OPENBLAS --static --shared --use-cuda=no --fst-root=${STAGING_INCDIR}/../ --fst-version=1.8.0 --openblas-root=${STAGING_INCDIR}/../ "
+
+do_configure() {
+
+  ./configure ${MYCONF}
+
+}
+
+do_compile() {
+
+  make ${PARALLEL_MAKE}
+
+}
+
+do_install() {
+
+  install -d ${D}${libdir}
+
+  for i in lib/*.so ; do
+    install -m 0644 ${i} ${D}${libdir}/
+  done
+
+  for i in */*.a ; do
+    install -m 0644 ${i} ${D}${libdir}/
+  done
+
+  for j in base chain decoder feat fstext gmm gst-plugin hmm itf ivector kws lat lm matrix nnet nnet2 nnet3 online online2 rnnlm sgmm2 tfrnnlm transform tree util cudadecoder  cudadecoderbin  cudafeat  cudamatrix ; do
+    install -d ${D}${includedir}/kaldi/$j
+    for i in $j/*.h ; do 
+      install -m 0644 $i ${D}${includedir}/kaldi/$j/
+    done
+  done
+
+  # make sure we have the package vosk-kaldi
+
+  install -d ${D}/usr/share/kaldi
+  echo "This is vosk-kaldi" > ${D}/usr/share/kaldi/README
+
+}
+
+FILES:${PN} += " /usr/share/kaldi  /usr/share/kaldi/README"
+ERROR_QA:remove = "rpaths"
+ERROR_QA:remove = "dev-elf"
diff --git a/meta-offline-voice-agent/recipes-vosk/vosk-model-small-en-us/vosk-model-small-en-us_0.15.bb b/meta-offline-voice-agent/recipes-vosk/vosk-model-small-en-us/vosk-model-small-en-us_0.15.bb
new file mode 100644
index 00000000..3a408a65
--- /dev/null
+++ b/meta-offline-voice-agent/recipes-vosk/vosk-model-small-en-us/vosk-model-small-en-us_0.15.bb
@@ -0,0 +1,23 @@
+SUMMARY = "Lightweight wideband model 'en-us'"
+HOMEPAGE = "https://alphacephei.com/vosk/"
+LICENSE = "Apache-2.0"
+# LIC_URL = "${COMMON_LICENSE_DIR}/Apache-2.0"
+LIC_FILES_CHKSUM = "file://${WORKDIR}/models.md;beginline=32;endline=32;md5=bb5cd71a409da2b13fa3bcb67a3573d1"
+
+SRC_URI = " \
+           https://alphacephei.com/vosk/models/vosk-model-small-en-us-0.15.zip;name=model \
+           https://raw.githubusercontent.com/alphacep/vosk-space/master/models.md;name=license \
+          "
+# License listed on https://alphacephei.com/vosk/models
+
+SRC_URI[model.sha256sum] = "30f26242c4eb449f948e42cb302dd7a686cb29a3423a8367f99ff41780942498"
+SRC_URI[license.sha256sum] = "3fbe0ee1fa914cb4b1cea2f2d7201a155884727cd0afbb51a267b66a73cb3444"
+
+do_install() {
+    install -d ${D}/usr/share/vosk
+    cp -R ${WORKDIR}/vosk-model-small-en-us-0.15/ ${D}/usr/share/vosk/
+}
+
+FILES:${PN} += " /usr/share/vosk  /usr/share/vosk/vosk-model-small-en-us-0.15 "
+
+RPROVIDES:${PN} += "virtual/vosk-model"
diff --git a/meta-offline-voice-agent/recipes-vosk/vosk-openfst/files/0001-build-fixes-for-bitbake.patch b/meta-offline-voice-agent/recipes-vosk/vosk-openfst/files/0001-build-fixes-for-bitbake.patch
new file mode 100644
index 00000000..fd3234c8
--- /dev/null
+++ b/meta-offline-voice-agent/recipes-vosk/vosk-openfst/files/0001-build-fixes-for-bitbake.patch
@@ -0,0 +1,64 @@
+From 8f5bc403c58af348d9671ca390c34cabde89a529 Mon Sep 17 00:00:00 2001
+From: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>
+Date: Sat, 9 Jul 2022 16:49:10 +0200
+Subject: [PATCH] build fixes for bitbake
+
+Signed-off-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>
+---
+ configure.ac | 36 +-----------------------------------
+ 1 file changed, 1 insertion(+), 35 deletions(-)
+
+diff --git a/configure.ac b/configure.ac
+index 9ab8824..316f719 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -5,7 +5,7 @@ AM_PROG_AR
+ AC_PROG_CXX
+ # This library does not throw exceptions, so we do not generate exception
+ # handling code. However, users are free to re-enable exception handling.
+-CXX="$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:${PN} += " /usr/lib/fst   /usr/lib/fst/arc_lookahead-fst.so \
+  /usr/lib/fst/ilabel_lookahead-fst.so \
+  /usr/lib/fst/ngram-fst.so \
+  /usr/lib/fst/olabel_lookahead-fst.so \
+"
diff --git a/meta-offline-voice-agent/recipes-vosk/vosk-server/vosk-server_git.bb b/meta-offline-voice-agent/recipes-vosk/vosk-server/vosk-server_git.bb
new file mode 100644
index 00000000..337cee46
--- /dev/null
+++ b/meta-offline-voice-agent/recipes-vosk/vosk-server/vosk-server_git.bb
@@ -0,0 +1,32 @@
+DESCRIPTION = "WebSocket, gRPC and WebRTC speech recognition server based on Vosk and Kaldi libraries"
+SUMMARY = "This is a server for highly accurate offline speech recognition using Kaldi and Vosk-API."
+HOMEPAGE = "https://github.com/alphacep/vosk-server"
+LICENSE = "Apache-2.0"
+LIC_FILES_CHKSUM = "file://COPYING;md5=d09bbd7a3746b6052fbd78b26a87396b"
+
+SRC_URI = "git://github.com/alphacep/vosk-server;protocol=https;branch=master"
+
+PV = "1.0+git${SRCPV}"
+SRCREV = "70f3d5321a40f2f5dffe9c833bc1fac4b3b451e7"
+
+S = "${WORKDIR}/git"
+
+DEPENDS = "python3-vosk-api openblas vosk boost"
+
+do_configure () {
+	:
+}
+
+do_compile () {
+	# websocket-cpp
+	cd websocket-cpp
+	${CXX} -I${STAGING_INCDIR}/vosk -lvosk ${LDFLAGS} -o vosk-websocket-cpp asr_server.cpp
+}
+
+do_install () {
+	# websocket-cpp
+	install -d ${D}${bindir}
+	cp websocket-cpp/vosk-websocket-cpp ${D}${bindir}
+}
+
+RDEPENDS:${PN} += "virtual/vosk-model"
\ No newline at end of file
diff --git a/meta-offline-voice-agent/recipes-vosk/vosk/vosk/0001-Build-fixes-for-shared-library-under-bitbake.patch b/meta-offline-voice-agent/recipes-vosk/vosk/vosk/0001-Build-fixes-for-shared-library-under-bitbake.patch
new file mode 100644
index 00000000..65bb866b
--- /dev/null
+++ b/meta-offline-voice-agent/recipes-vosk/vosk/vosk/0001-Build-fixes-for-shared-library-under-bitbake.patch
@@ -0,0 +1,74 @@
+From be3688fc475ece12d0fb8b7bcb993b053e91d3ec Mon Sep 17 00:00:00 2001
+From: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>
+Date: Thu, 14 Jul 2022 18:31:47 +0200
+Subject: [PATCH] Build fixes for shared library under bitbake
+
+Signed-off-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>
+---
+ Makefile | 18 ++++++++++++------
+ 1 file changed, 12 insertions(+), 6 deletions(-)
+
+diff --git a/Makefile b/Makefile
+index cd697b1..7918a82 100644
+--- a/Makefile
++++ b/Makefile
+@@ -1,5 +1,6 @@
+ # Locations of the dependencies
+ KALDI_ROOT?=$(HOME)/travis/kaldi
++KALDI_LIBS?=$(HOME)/travis/kaldi/libs
+ OPENFST_ROOT?=$(KALDI_ROOT)/tools/openfst
+ OPENBLAS_ROOT?=$(KALDI_ROOT)/tools/OpenBLAS/install
+ MKL_ROOT?=/opt/intel/mkl
+@@ -33,7 +34,7 @@ VOSK_HEADERS= \
+ 	vosk_api.h
+ 
+ CFLAGS=-g -O3 -std=c++17 -Wno-deprecated-declarations -fPIC -DFST_NO_DYNAMIC_LINKING \
+-       -I. -I$(KALDI_ROOT)/src -I$(OPENFST_ROOT)/include $(EXTRA_CFLAGS)
++       -I. -I$(KALDI_ROOT) -I$(OPENFST_ROOT) $(EXTRA_CFLAGS)
+ 
+ LDFLAGS=
+ 
+@@ -60,11 +61,11 @@ ifeq ($(USE_SHARED), 0)
+         $(OPENFST_ROOT)/lib/libfstngram.a
+ else
+     LDFLAGS += \
+-        -L$(KALDI_ROOT)/libs \
++        -L$(KALDI_LIBS) \
+         -lkaldi-online2 -lkaldi-decoder -lkaldi-ivector -lkaldi-gmm -lkaldi-tree \
+         -lkaldi-feat -lkaldi-lat -lkaldi-lm -lkaldi-rnnlm -lkaldi-hmm -lkaldi-nnet3 \
+         -lkaldi-transform -lkaldi-cudamatrix -lkaldi-matrix -lkaldi-fstext \
+-        -lkaldi-util -lkaldi-base -lfst -lfstngram
++        -lkaldi-util -lkaldi-base -lfst -lfstngram -shared -Wl,-soname,libvosk.so.0.3.42
+ endif
+ 
+ ifeq ($(HAVE_OPENBLAS_CLAPACK), 1)
+@@ -76,7 +77,8 @@ ifeq ($(HAVE_OPENBLAS_CLAPACK), 1)
+             $(OPENBLAS_ROOT)/lib/libblas.a \
+             $(OPENBLAS_ROOT)/lib/libf2c.a
+     else
+-        LDFLAGS += -lopenblas -llapack -lblas -lf2c
++        LDFLAGS += -lopenblas 
++        # -llapack -lblas -lf2c
+     endif
+ endif
+ 
+@@ -103,10 +105,14 @@ ifeq ($(HAVE_CUDA), 1)
+     LDFLAGS += -L$(CUDA_ROOT)/lib64 -lcuda -lcublas -lcusparse -lcudart -lcurand -lcufft -lcusolver -lnvToolsExt
+ endif
+ 
+-all: $(OUTDIR)/libvosk.$(EXT)
++all: $(OUTDIR)/libvosk.$(EXT).0.3.42
++$(OUTDIR)/libvosk.$(EXT).0.3.42: $(OUTDIR)/libvosk.$(EXT)
++	mv libvosk.${EXT} libvosk.${EXT}.0.3.42
++	ln -sf libvosk.${EXT}.0.3.42 libvosk.so
++
+ 
+ $(OUTDIR)/libvosk.$(EXT): $(VOSK_SOURCES:%.cc=$(OUTDIR)/%.o) $(LIBS)
+-	$(CXX) --shared -s -o $@ $^ $(LDFLAGS) $(EXTRA_LDFLAGS)
++	$(CXX) --shared -o $@ $^ $(LDFLAGS) $(EXTRA_LDFLAGS)
+ 
+ $(OUTDIR)/%.o: %.cc $(VOSK_HEADERS)
+ 	$(CXX) $(CFLAGS) -c -o $@ $<
+-- 
+2.33.0
+
diff --git a/meta-offline-voice-agent/recipes-vosk/vosk/vosk_0.3.42.bb b/meta-offline-voice-agent/recipes-vosk/vosk/vosk_0.3.42.bb
new file mode 100644
index 00000000..bf4ffe31
--- /dev/null
+++ b/meta-offline-voice-agent/recipes-vosk/vosk/vosk_0.3.42.bb
@@ -0,0 +1,49 @@
+SUMMARY = "Offline open source speech recognition API based on Kaldi and Vosk"
+HOMEPAGE = "https://github.com/alphacep/vosk-api"
+LICENSE = "Apache-2.0"
+LIC_FILES_CHKSUM = "file://../COPYING;md5=d09bbd7a3746b6052fbd78b26a87396b"
+
+SRC_URI = "git://github.com/alphacep/vosk-api;protocol=https;branch=master \
+           file://0001-Build-fixes-for-shared-library-under-bitbake.patch \
+           "
+
+PV = "0.3.42+git${SRCPV}"
+SRCREV = "b1b216d4c87d708935f1601287fe502aa11ee4a9"
+
+S = "${WORKDIR}/git/src"
+
+DEPENDS += " vosk-kaldi vosk-openfst openblas"
+
+RDEPENDS:${PN} += " \
+"
+
+CFLAGS:append = " -I${STAGING_INCDIR}/kaldi -g "
+LDFLAGS:remove = "-Wl,--as-needed"
+
+do_configure(){
+    :
+}
+
+do_compile(){
+
+    make KALDI_ROOT=${STAGING_INCDIR}/kaldi/ OPENFST_ROOT=${STAGING_INCDIR} OPENBLAS_ROOT=${STAGING_INCDIR} USE_SHARED=1 EXTRA_CFLAGS="${CFLAGS}" EXTRA_LDFLAGS="${LDFLAGS}" ${PARALLEL_MAKE}
+
+}
+
+do_install(){
+
+    install -d ${D}${libdir}
+    install -m 0644 libvosk.so.0.3.42 ${D}${libdir}
+    cd ${D}${libdir}
+    ln -sf libvosk.so.0.3.42 libvosk.so
+    ln -sf libvosk.so.0.3.42 libvosk.so.0
+    cd ${S}
+
+    install -d ${D}${includedir}/vosk
+    for i in *.h ; do
+	install -m 0644 $i ${D}${includedir}/vosk/
+    done
+
+}
+
+ERROR_QA:remove = "dev-deps"