Adds Amazon Polly driver.

Author: dsposito

src/Provider/Amazon.php

@@ -0,0 +1,62 @@
+<?php
+
+namespace DayRev\Synthesizer\Provider;
+
+use Aws\Polly\PollyClient;
+use DayRev\Synthesizer\Provider;
+
+/**
+ * Amazon Polly text to speech driver.
+ *
+ * @see http://docs.aws.amazon.com/polly/latest/dg/what-is.html
+ */
+class Amazon extends Provider
+{
+    /**
+     * Max text length that can be synthesized.
+     *
+     * @var int
+     */
+    protected $max_text_length = 1500;
+
+    /**
+     * Builds the synthesized audio file URL for the text.
+     *
+     * @param string $text Text to synthesize.
+     *
+     * @return string
+     */
+    public function buildAudioUrl(string $text): string
+    {
+        $this->params = array_merge($this->params, array(
+            'text' => $this->cleanText($text),
+        ));
+
+        return $this->getAudioUrl();
+    }
+
+    /**
+     * Gets the URL to the synthesized audio file.
+     *
+     * @return string
+     */
+    protected function getAudioUrl(): string
+    {
+        $client = new PollyClient([
+            'version' => 'latest',
+            'region' => $this->params['region'] ?? 'us-west-2',
+            'credentials' => [
+                'key' => $this->params['key'],
+                'secret' => $this->params['secret'],
+            ],
+        ]);
+
+        return $client->createSynthesizeSpeechPreSignedUrl([
+            'OutputFormat' => $this->params['OutputFormat'] ?? 'mp3',
+            'SampleRate' => $this->params['SampleRate'] ?? '8000',
+            'Text' => $this->params['text'],
+            'TextType' => $this->params['TextType'] ?? 'text',
+            'VoiceId' => $this->params['VoiceId'] ?? 'Joanna',
+        ]);
+    }
+}