Added Amazon Polly TTS generation script

polly.py

@@ -0,0 +1,101 @@
+import sys
+import os
+import xml.etree.ElementTree
+import re
+import json
+import hashlib
+try:
+    import boto3
+except:
+    print('Could not import boto3. Please install it using "pip3 install boto3"')
+
+if len(sys.argv)!=2:
+    print("Usage:   python3 polly.py [input file]")
+xmlFile = sys.argv[1]
+
+with open(xmlFile, "r") as f:
+    xmlRaw = "<wrapper xmlns:amazon=\"http://www.amazon.com\">\n"+f.read()+"\n</wrapper>"
+
+try:
+    with open(xmlFile[:-4]+".pollycache.json", "r") as f:
+        fileCache = json.loads(f.read())
+except:
+    fileCache = {}
+    print("Could not open file cache, recreating all files over Polly.")
+
+if not "files" in fileCache:
+    fileCache["files"] = {}
+
+
+def startPolly(awsAccessKeyId, awsSecretAccessKey):
+    pollyClient = boto3.Session(
+                        aws_access_key_id=awsAccessKeyId,
+                        aws_secret_access_key=awsSecretAccessKey,
+                        region_name="eu-central-1").client("polly")
+    try:
+        response = pollyClient.synthesize_speech(VoiceId="Joanna",OutputFormat="ogg_vorbis",Text="")
+    except:
+        print("Error: Invalid credentials!")
+        raise
+        return False
+    return pollyClient
+
+def saveFileCache():
+    global xmlFile
+    with open(xmlFile[:-4]+".pollycache.json", "w") as f:
+        f.write(json.dumps(fileCache))
+
+if "awsAccessKeyId" not in fileCache or "awsSecretAccessKey" not in fileCache:
+    awsAccessKeyId     = input("Amazon AWS Access Key ID:     ")
+    awsSecretAccessKey = input("Amazon AWS Access Secret Key: ")
+    print("Testing access")
+    pollyClient = startPolly(awsAccessKeyId, awsSecretAccessKey)
+    if not pollyClient:
+        exit(1)
+    print("Credentials are working.")
+    if (input("Do you want me to save those credentials? [y/N] ").lower() == "y"):
+        fileCache["awsAccessKeyId"]     = awsAccessKeyId
+        fileCache["awsSecretAccessKey"] = awsSecretAccessKey
+        print("Saving credentials")
+        saveFileCache()
+    else:
+        print("Not saving credentials")
+else:
+    print("Found stored AWS credentials")
+    print("Testing access")
+    pollyClient = startPolly(fileCache["awsAccessKeyId"], fileCache["awsSecretAccessKey"])
+    if not pollyClient:
+        print("Deleting stored credentials")
+        del fileCache["awsAccessKeyId"]
+        del fileCache["awsSecretAccessKey"]
+        saveFileCache()
+        print("Please restart the program.")
+        exit(1)
+
+xml.etree.ElementTree.register_namespace("amazon", "http://www.amazon.com")
+root = xml.etree.ElementTree.fromstring(xmlRaw)
+
+for polly in root:
+    fileName = polly.attrib["file"]
+    voice = polly.attrib["voice"]
+    content = xml.etree.ElementTree.tostring(polly[0]).decode("utf-8").strip()
+    content = re.sub("^<speak xmlns:amazon=\"http://www.amazon.com\">", "<speak>", content)
+    contentMd5 = hashlib.md5(content.encode("utf-8")).hexdigest()
+
+    if (contentMd5 != fileCache["files"].get(fileName, {}).get("contentMd5","")) or \
+            (not os.path.exists(fileName)) or \
+            (hashlib.md5(open(fileName,'rb').read()).hexdigest() != fileCache["files"].get(fileName, {}).get("fileMd5","")):
+
+        print("Generating "+fileName)
+        response = pollyClient.synthesize_speech(VoiceId=voice,OutputFormat="ogg_vorbis",TextType="ssml",Text=content)
+
+        with open(fileName, "wb") as f:
+            f.write(response['AudioStream'].read())
+
+        fileCache["files"][fileName] = {
+                "contentMd5": contentMd5,
+                "fileMd5":    hashlib.md5(open(fileName,'rb').read()).hexdigest(),
+            }
+        saveFileCache()
+    else:
+        print("File "+fileName+" does not need to be generated.")