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/track.h

@@ -0,0 +1,52 @@
+#ifndef  __TRACK_H__
+#define __TRACK_H__
+
+#include <mutex>
+#include <queue>
+#include "common.h"
+#include "ap.h"
+
+class Track {
+public:
+  Track(const std::string& trackName, int sampleRate);
+  ~Track();
+
+  /* audio production methods */
+  void queueHttpGetAudio(const std::string& url, int gain = 0, bool loop = false);
+  void queueHttpPostAudio(const std::string& url, int gain = 0, bool loop = false);
+  void queueHttpPostAudio(const std::string& url, const std::string& body, std::vector<std::string>& headers, int gain = 0, bool loop = false);
+  void queueFileAudio(const std::string& path, int gain = 0, bool loop = false);
+  void removeAllAudio();
+
+  void onPlayDone(bool hasError, const std::string& errMsg);
+
+  std::string& getTrackName() { return _trackName; }
+
+  /* audio playout methods */
+  bool hasAudio();
+  inline bool hasAudio_NoLock() const {
+    return !_stopping && !_buffer.empty();
+  }
+
+
+  int retrieveAndClearAudio(int16_t* buf, int desiredSamples) {
+    std::lock_guard<std::mutex> lock(_mutex);
+    int samplesToCopy = std::min(static_cast<int>(_buffer.size()), desiredSamples);
+    std::copy_n(_buffer.begin(), samplesToCopy, buf);
+    _buffer.erase(_buffer.begin(), _buffer.begin() + samplesToCopy);
+    return samplesToCopy;
+  }
+
+private:
+  std::string _trackName;
+  int _sampleRate;
+  std::mutex _mutex;
+  CircularBuffer_t _buffer;
+  std::queue<std::shared_ptr<AudioProducer>> _apQueue;
+  bool _stopping;
+};
+
+
+
+
+#endif