Add accessors to audio::mixer

include/audio/impl/mixer.hpp

@@ -44,7 +44,7 @@ namespace audio::impl{
 		audio::stream m_output_sink;
 
 	public:
-		mixer(int output_channels, size_t channel_count);
+		mixer(int output_channels, size_t channel_count, size_t samplerate);
 		mixer(const mixer&) = delete;
 		mixer(mixer&&) = delete;
 		~mixer();
@@ -67,6 +67,10 @@ namespace audio::impl{
 		bool should_exit()const;
 		void exit();
 		size_t output_channels()const;
+
+		size_t get_samplerate()const;
+		size_t channel_count()const;
+
 	private:
 		static int callback(const void* /*input*/, void* output, unsigned long frame_count, unsigned long flags, mixer& mix);
 	};

include/audio/mixer.hpp

@@ -38,7 +38,7 @@ namespace audio{
 	private:
 		impl::mixer* m_mix;
 	public:
-		mixer(mode m, size_t channel_count);
+		mixer(mode m, size_t channel_count, size_t samplerate = 48000);
 		mixer(const mixer&) = delete;
 		mixer(mixer&&) = delete;
 		~mixer();
@@ -56,6 +56,9 @@ namespace audio{
 		void pause();
 		void resume();
 		void terminate();
+
+		size_t get_samplerate()const;
+		size_t channel_count()const;
 	};
 
 }

include/audio/stream.hpp

@@ -34,6 +34,7 @@ namespace audio{
 		detail::callback_iface* m_cb = nullptr;
 		PaStream* m_stream = nullptr;
 		mutable PaError m_err = paNoError;
+		double m_samplerate;
 		int m_in_channels;
 		int m_out_channels;
 
@@ -46,6 +47,7 @@ namespace audio{
 			m_cb(new detail::callback_impl<Callback,Args...>(std::forward<Callback>(cb), std::forward<Args>(cbargs)...)),
 			m_stream(initialize_global_instance()),
 			m_err(open_default_stream(&m_stream, in_c, out_c, paFloat32, samplerate, buffersize, m_cb)),
+			m_samplerate(samplerate),
 			m_in_channels(in_c),
 			m_out_channels(out_c){}
 
@@ -62,6 +64,8 @@ namespace audio{
 		int input_count()const;
 		int output_count()const;
 
+		double get_samplerate()const;
+
 		error last_error()const;
 
 	private:

src/audio/impl/mixer.cpp

@@ -28,13 +28,13 @@ namespace audio::impl{
 		return (left < right) ? left : right;
 	}
 
-	mixer::mixer(int output_channels, size_t channel_count):
+	mixer::mixer(int output_channels, size_t channel_count, size_t samplerate):
 		m_paused(false),
 		m_exit(false),
 		m_operating(false),
 		m_channels(channel_count),
 		m_lk(m_copy_lock, std::defer_lock),
-		m_output_sink(0, output_channels, 44100, 0, callback, *this)
+		m_output_sink(0, output_channels, samplerate, 0, callback, *this)
 	{
 		m_output_sink.start();
 	}
@@ -100,6 +100,12 @@ namespace audio::impl{
 	size_t mixer::output_channels()const{
 		return m_output_sink.output_count();
 	}
+	size_t mixer::get_samplerate()const{
+		return m_output_sink.get_samplerate();
+	}
+	size_t mixer::channel_count()const{
+		return m_channels.size();
+	}
 	int mixer::callback(const void* /*input*/, void* output, unsigned long frame_count, unsigned long flags, mixer& mix){
 		if(flags & paPrimingOutput)
 			return paContinue;

src/audio/mixer.cpp

@@ -21,8 +21,8 @@
 
 namespace audio{
 
-	mixer::mixer(mode m, size_t channel_count):
+	mixer::mixer(mode m, size_t channel_count, size_t samplerate):
-		m_mix(new impl::mixer(static_cast<int>(m), channel_count)){}
+		m_mix(new impl::mixer(static_cast<int>(m), channel_count, samplerate)){}
 	mixer::~mixer(){
 		delete m_mix;
 	}
@@ -60,4 +60,10 @@ namespace audio{
 		m_mix->exit();
 	}
 
+	size_t mixer::get_samplerate()const{
+		return m_mix->get_samplerate();
+	}
+	size_t mixer::channel_count()const{
+		return m_mix->channel_count();
+	}
 }

src/audio/stream.cpp

@@ -61,6 +61,9 @@ namespace audio{
 		return m_out_channels;
 	}
 
+	double stream::get_samplerate()const{
+		return m_samplerate;
+	}
 
 	error stream::last_error()const{
 		return error(m_err);