From 628ad2aaa2e207aa2836e9b68f7bfbd890dff766 Mon Sep 17 00:00:00 2001
From: makefu <github@syntax-fehler.de>
Date: Tue, 5 Nov 2013 18:14:21 +0100
Subject: speech to text: initial commit

---
 util/lib/stt/google.sh | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100644 util/lib/stt/google.sh

(limited to 'util/lib/stt/google.sh')

diff --git a/util/lib/stt/google.sh b/util/lib/stt/google.sh
new file mode 100644
index 00000000..a78579d5
--- /dev/null
+++ b/util/lib/stt/google.sh
@@ -0,0 +1,35 @@
+#!/bin/sh
+
+_get_content_type(){
+    file -b --mime-type "$1"
+}
+_get_audio_rate(){
+    file "$1" | sed -n -e 's/.* \([.0-9]\+\) kHz.*/\1/p' \
+        | awk '{print int($1 *1000)}'
+}
+
+record_audio(){
+    # usage : _record_audio num_seconds
+    # echoes the output file
+    tmpfile=$(mktemp)
+    : ${1?please provide number of seconds to record}
+    arecord -d "$1" -r 16000 -t wav -q -f cd  | flac -s -f - -o "$tmpfile" && echo "$tmpfile"
+}
+stt(){
+    # usage: (lang=de-de stty recorded_file)
+    : ${1? please provide recorded file}
+    infile="$1"
+    lang=${lang:-en-us}
+    _get_content_type "$1" | (! grep -q "x-flac" ) \
+        && echo "infile needs to be in flac format" \
+        && return 1
+    # only flac seems to be working...
+    wget -q -O - \
+        -U 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_6_8) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.77 Safari/535.7' \
+        --post-file "$infile"  \
+        --header "Content-Type: `_get_content_type $infile`; rate=`_get_audio_rate $infile`;" \
+    "http://www.google.com/speech-api/v1/recognize?lang=${lang}&client=chromium&maxresults=1" \
+    | sed -n 's/.*utterance":"\([^"]*\)".*/\1/p'
+
+    # returns {"status":0,"id":"d9269e6f741997161e41a4d441b34ba1-1","hypotheses":[{"utterance":"hallo Welt","confidence":0.7008959}]}
+}
-- 
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