Merge pull request GoogleCloudPlatform#138 from GoogleCloudPlatform/speech

Cloud Speech API samples

Author: tswast

pom.xml

@@ -69,6 +69,7 @@
         <module>managed_vms/twilio</module>
         <module>monitoring/v2</module>
         <module>monitoring/v3</module>
+        <module>speech/grpc</module>
         <module>storage/json-api</module>
         <module>storage/storage-transfer</module>
         <module>storage/xml-api/cmdline-sample</module>

speech/README.md

@@ -0,0 +1,8 @@
+# Cloud Pub/Sub samples for Java
+
+This directory contains several samples for the [Cloud Speech API](https://cloud.google.com/speech/)
+with Java.
+
+- [grpc](grpc)
+
+  A sample for accessing Cloud Speech streaming and non streaming apis with [gRPC](http://www.grpc.io/).

speech/grpc/README.md

@@ -0,0 +1,100 @@
+# Cloud Speech API gRPC samples for Java
+
+This is a sample repo for accessing the [Google Cloud Speech API](http://cloud.google.com/speech) with
+[gRPC](http://www.grpc.io/) client library.
+
+
+## Prerequisites
+
+### Enable the Speech API
+
+If you have not already done so, [enable the Google Cloud Speech API for your project](https://console.developers.google.com/apis/api/speech.googleapis.com/overview).
+You must be whitelisted to do this.
+
+
+### Download and install Java and Maven
+
+Install [Java7 or
+higher](http://www.oracle.com/technetwork/java/javase/downloads/jre7-downloads-1880261.html).
+
+This sample uses the [Apache Maven][maven] build system. Before getting started, be
+sure to [download][maven-download] and [install][maven-install] it. When you use
+Maven as described here, it will automatically download the needed client
+libraries.
+
+[maven]: https://maven.apache.org
+[maven-download]: https://maven.apache.org/download.cgi
+[maven-install]: https://maven.apache.org/install.html
+
+
+### Set Up to Authenticate With Your Project's Credentials
+
+The example uses a service account for OAuth2 authentication.
+So next, set up to authenticate with the Speech API using your project's
+service account credentials.
+
+Visit the [Cloud Console](https://console.developers.google.com), and navigate to:
+`API Manager > Credentials > Create credentials >
+Service account key > New service account`.
+Create a new service account, and download the json credentials file.
+
+Then, set
+the `GOOGLE_APPLICATION_CREDENTIALS` environment variable to point to your
+downloaded service account credentials before running this example:
+
+    export GOOGLE_APPLICATION_CREDENTIALS=/path/to/your/credentials-key.json
+
+If you do not do this, you will see an error that looks something like this when
+you run the example scripts:
+`WARNING: RPC failed: Status{code=PERMISSION_DENIED, description=Request had insufficient authentication scopes., cause=null}`.
+See the
+[Cloud Platform Auth Guide](https://cloud.google.com/docs/authentication#developer_workflow)
+for more information.
+
+## Build the application
+
+Then, build the program:
+
+```sh
+$ mvn package
+```
+
+or
+
+```sh
+$ mvn compile
+$ mvn assembly:single
+```
+
+## Run the clients
+
+These programs return the transcription of the audio file you provided.  Please
+note that the audio file must be in RAW format.  You can use `sox`
+(available, e.g. via [http://sox.sourceforge.net/](http://sox.sourceforge.net/)
+or [homebrew](http://brew.sh/)) to convert audio files to raw format.
+
+### Run the non-streaming client
+
+You can run the batch client like this:
+
+```sh
+$ bin/speech-sample-nonstreaming.sh --host=speech.googleapis.com --port=443 \
+--file=<audio file path> --sampling=<sample rate>
+```
+
+Try a streaming rate of 16000 and the included sample audio file, as follows:
+
+```sh
+$ bin/speech-sample-nonstreaming.sh --host=speech.googleapis.com --port=443 \
+--file=resources/audio.raw --sampling=16000
+```
+
+### Run the streaming client
+
+You can run the streaming client as follows:
+
+```sh
+$ bin/speech-sample-streaming.sh --host=speech.googleapis.com --port=443 \
+--file=resources/audio.raw --sampling=16000
+```
+

speech/grpc/bin/speech-sample-nonstreaming.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+# Copyright 2016 Google Inc. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+SRC_DIR=$(cd "$(dirname "$0")/.."; pwd)
+java -cp ${SRC_DIR}/target/grpc-sample-1.0-jar-with-dependencies.jar \
+    com.google.cloud.speech.grpc.demos.NonStreamingRecognizeClient "$@"

speech/grpc/bin/speech-sample-streaming.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+# Copyright 2016 Google Inc. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+SRC_DIR=$(cd "$(dirname "$0")/.."; pwd)
+java -cp ${SRC_DIR}/target/grpc-sample-1.0-jar-with-dependencies.jar \
+    com.google.cloud.speech.grpc.demos.RecognizeClient "$@"