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>

3 files changed, 77 insertions, 0 deletions

diff --git a/meta-offline-voice-agent/recipes-python/python3-vosk/python3-vosk-api/0001-Change-library-search-path-to-usr-lib.patch b/meta-offline-voice-agent/recipes-python/python3-vosk/python3-vosk-api/0001-Change-library-search-path-to-usr-lib.patch
new file mode 100644
index 00000000..dd4103d9
--- /dev/null
+++ b/meta-offline-voice-agent/recipes-python/python3-vosk/python3-vosk-api/0001-Change-library-search-path-to-usr-lib.patch
@@ -0,0 +1,26 @@
+From 6bbf9272cb367a06a4e4f3303628075df0b51085 Mon Sep 17 00:00:00 2001
+From: amanarora_09 <aman.arora9848@gmail.com>
+Date: Fri, 22 Jul 2022 13:27:07 +0200
+Subject: [PATCH] Change library search path to /usr/lib/
+
+Make the standard location known to the python library.
+
+Signed-off-by: amanarora_09 <aman.arora9848@gmail.com>
+---
+ python/vosk/__init__.py | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/python/vosk/__init__.py b/python/vosk/__init__.py
+index 45e2706..d260c61 100644
+--- a/vosk/__init__.py
++++ b/vosk/__init__.py
+@@ -23,7 +23,8 @@ def open_dll():
+             os.add_dll_directory(dlldir)
+         return _ffi.dlopen(os.path.join(dlldir, "libvosk.dll"))
+     elif sys.platform == 'linux':
+-        return _ffi.dlopen(os.path.join(dlldir, "libvosk.so"))
++        dlldir = os.path.abspath("/usr/lib/")
++        return _ffi.dlopen(os.path.join(dlldir, "libvosk.so.0"))
+     elif sys.platform == 'darwin':
+         return _ffi.dlopen(os.path.join(dlldir, "libvosk.dyld"))
+     else:
diff --git a/meta-offline-voice-agent/recipes-python/python3-vosk/python3-vosk-api/run-ptest b/meta-offline-voice-agent/recipes-python/python3-vosk/python3-vosk-api/run-ptest
new file mode 100644
index 00000000..567af9d7
--- /dev/null
+++ b/meta-offline-voice-agent/recipes-python/python3-vosk/python3-vosk-api/run-ptest
@@ -0,0 +1,3 @@
+#!/bin/sh
+cd tests/
+./test_simple.py test.wav
diff --git a/meta-offline-voice-agent/recipes-python/python3-vosk/python3-vosk-api_0.3.42.bb b/meta-offline-voice-agent/recipes-python/python3-vosk/python3-vosk-api_0.3.42.bb
new file mode 100644
index 00000000..ba15bd56
--- /dev/null
+++ b/meta-offline-voice-agent/recipes-python/python3-vosk/python3-vosk-api_0.3.42.bb
@@ -0,0 +1,48 @@
+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-Change-library-search-path-to-usr-lib.patch \
+           file://run-ptest \
+           "
+
+PV = "0.3.42+git${SRCPV}"
+SRCREV = "b1b216d4c87d708935f1601287fe502aa11ee4a9"
+
+S = "${WORKDIR}/git/python"
+
+inherit setuptools3 ptest
+
+DEPENDS += " \
+    python3-srt-native \
+    python3-tqdm-native \
+    python3-requests-native \
+    python3-pip-native \
+    python3-charset-normalizer-native \
+"
+
+RDEPENDS:${PN} += " \
+    python3-cffi \
+    python3-compression \
+    python3-core \
+    python3-datetime \
+    python3-json \
+    python3-logging \
+    python3-misc \
+    python3-multiprocessing \
+    python3-netclient \
+    python3-requests \
+    python3-tqdm \
+    python3-srt \
+    python3-charset-normalizer \
+    python3-sounddevice \
+    virtual/vosk-model \
+"
+
+do_install_ptest () {
+    install -d ${D}${PTEST_PATH}/tests/
+    cp ${S}/example/test_simple.py ${D}${PTEST_PATH}/tests/
+    cp ${S}/example/test.wav ${D}${PTEST_PATH}/tests/
+}