Feat/mod dub v2 (#22)

* support tts elevenlabs to mod_dub

Signed-off-by: Quan HL <quan.luuhoang8@gmail.com>

* wip

Signed-off-by: Quan HL <quan.luuhoang8@gmail.com>

* wip

* wip

* fix aws race condition when 2 start transcribes are sent at the same instant

* wip

* wip

* wip

* allow queue play on track

* wip

Signed-off-by: Quan HL <quan.luuhoang8@gmail.com>

* revert change for aws transcribe

Signed-off-by: Quan HL <quan.luuhoang8@gmail.com>

* fix type

* wip

* wip

* rename parameters

* rename paramters

* wip

* wip

* wip

* wip

* wip

* bug: there exists scenarios where callback is not defined

* wip

* wip

* revert unintended changes to mod_google_transcribe

* fix bugs w/ streaming tts simplified arg parsing to use freeswitch conventions

---------

Signed-off-by: Quan HL <quan.luuhoang8@gmail.com>
Co-authored-by: Quan HL <quan.luuhoang8@gmail.com>

mod_dub/ap.h

@@ -0,0 +1,41 @@
+#ifndef __AP_H__
+#define __AP_H__
+
+#include <mutex>
+
+#include "common.h"
+
+class AudioProducer {
+public:
+  AudioProducer(
+    std::mutex& mutex,
+    CircularBuffer_t& circularBuffer,
+    int sampleRate
+  ) : _mutex(mutex), _buffer(circularBuffer), _sampleRate(sampleRate), _notified(false), _loop(false), _gain(0) {}
+  virtual ~AudioProducer() {}
+
+  virtual void notifyDone(bool error, const std::string& errorMsg) {
+    if (!_notified) {
+      _notified = true;
+      if (_callback) _callback(error, errorMsg);
+    }
+  }
+  virtual void start(std::function<void(bool, const std::string&)> callback) = 0;
+  virtual void stop() = 0;
+
+  bool isLoopedAudio() const { return _loop; }
+
+protected:
+  std::mutex& _mutex;
+  CircularBuffer_t& _buffer;
+  int _sampleRate;
+  int _gain;
+  bool _loop;
+  std::function<void(bool, const std::string&)> _callback;
+  bool _notified;
+};
+
+
+
+
+#endif