audio: remove ring::audio namespace

It is only used by the AudioInput, move it to the same namespace as
other audio related classes.

Change-Id: Icc92fbb2021a24a9d65bb904d2e790609414bd77

src/media/audio/audio_input.cpp

@@ -27,7 +27,7 @@
 #include "manager.h"
 #include "smartools.h"
 
-namespace ring { namespace audio {
+namespace ring {
 
 AudioInput::AudioInput(const std::string& id) :
     id_(id),
@@ -121,4 +121,4 @@ AudioInput::initRecorder(const std::shared_ptr<MediaRecorder>& rec)
     recorder_ = rec;
 }
 
-}} // namespace ring::audio
+} // namespace ring

src/media/audio/audio_input.h

@@ -29,7 +29,7 @@ namespace ring {
 class MediaRecorder;
 }
 
-namespace ring { namespace audio {
+namespace ring {
 
 class AudioInput
 {
@@ -57,4 +57,4 @@ private:
     void cleanup();
 };
 
-}} // namespace ring::audio
+} // namespace ring

src/media/localrecorder.cpp

@@ -74,7 +74,7 @@ LocalRecorder::startRecording()
     ring::Manager::instance().startAudioDriverStream();
     // TODO wait for AudioLayer::hardwareFormatAvailable callback, otherwise a race condition happens here
 
-    audioInput_.reset(new ring::audio::AudioInput(RingBufferPool::DEFAULT_ID));
+    audioInput_.reset(new ring::AudioInput(RingBufferPool::DEFAULT_ID));
     audioInput_->initRecorder(recorder_);
 
 #ifdef RING_VIDEO

src/media/localrecorder.h

@@ -63,7 +63,7 @@ class LocalRecorder : public Recordable {
     private:
         bool videoInputSet_ = false;
         std::weak_ptr<ring::video::VideoInput> videoInput_;
-        std::unique_ptr<ring::audio::AudioInput> audioInput_ = nullptr;
+        std::unique_ptr<ring::AudioInput> audioInput_ = nullptr;
         std::string path_;
 };