Refactor PortAudioIO::discover into three private methods

2 files changed, 38 insertions, 15 deletions

diff --git a/libs/backends/portaudio/portaudio_io.cc b/libs/backends/portaudio/portaudio_io.cc
index 164ac91cd8..77ea0536fb 100644
--- a/libs/backends/portaudio/portaudio_io.cc
+++ b/libs/backends/portaudio/portaudio_io.cc
@@ -211,29 +211,36 @@ PortAudioIO::get_default_output_device ()
 }
 
 void
-PortAudioIO::discover()
+PortAudioIO::clear_device_list ()
 {
-	if (!initialize_pa()) return;
-
 	for (std::map<int, paDevice*>::const_iterator i = _devices.begin (); i != _devices.end(); ++i) {
 		delete i->second;
 	}
 	_devices.clear();
+}
 
+void
+PortAudioIO::add_default_device ()
+{
 	const PaHostApiInfo* info = Pa_GetHostApiInfo (_host_api_index);
 	if (info == NULL) return;
 
-	{
-		const PaDeviceInfo* nfo_i = Pa_GetDeviceInfo(get_default_input_device());
-		const PaDeviceInfo* nfo_o = Pa_GetDeviceInfo(get_default_output_device());
-		if (nfo_i && nfo_o) {
-			_devices.insert (std::pair<int, paDevice*> (-1,
-						new paDevice("Default",
-							nfo_i->maxInputChannels,
-							nfo_o->maxOutputChannels
-							)));
-		}
+	const PaDeviceInfo* nfo_i = Pa_GetDeviceInfo(get_default_input_device());
+	const PaDeviceInfo* nfo_o = Pa_GetDeviceInfo(get_default_output_device());
+	if (nfo_i && nfo_o) {
+		_devices.insert (std::pair<int, paDevice*> (-1,
+					new paDevice("Default",
+						nfo_i->maxInputChannels,
+						nfo_o->maxOutputChannels
+						)));
 	}
+}
+
+void
+PortAudioIO::add_devices ()
+{
+	const PaHostApiInfo* info = Pa_GetHostApiInfo (_host_api_index);
+	if (info == NULL) return;
 
 	int n_devices = Pa_GetDeviceCount();
 #ifndef NDEBUG
@@ -259,6 +266,7 @@ PortAudioIO::discover()
 		if ( nfo->maxInputChannels == 0 && nfo->maxOutputChannels == 0) {
 			continue;
 		}
+
 		_devices.insert (std::pair<int, paDevice*> (i, new paDevice(
 						nfo->name,
 						nfo->maxInputChannels,
@@ -268,6 +276,16 @@ PortAudioIO::discover()
 }
 
 void
+PortAudioIO::discover()
+{
+	if (!initialize_pa()) return;
+
+	clear_device_list ();
+	add_default_device ();
+	add_devices ();
+}
+
+void
 PortAudioIO::pcm_stop ()
 {
 	if (_stream) {
diff --git a/libs/backends/portaudio/portaudio_io.h b/libs/backends/portaudio/portaudio_io.h
index 9871850ec4..fccda4f05e 100644
--- a/libs/backends/portaudio/portaudio_io.h
+++ b/libs/backends/portaudio/portaudio_io.h
@@ -75,7 +75,13 @@ public:
 	int      get_capture_channel (uint32_t chn, float *input, uint32_t n_samples);
 	int      set_playback_channel (uint32_t chn, const float *input, uint32_t n_samples);
 
-private:
+private: // Methods
+
+	void clear_device_list ();
+	void add_default_device ();
+	void add_devices ();
+
+private: // Data
 	int  _state;
 	bool _initialized;
 
@@ -91,7 +97,6 @@ private:
 	uint32_t _cur_input_latency;
 	uint32_t _cur_output_latency;
 
-
 	struct paDevice {
 		std::string name;
 		uint32_t n_inputs;