engine sounds

4 files changed, 84 insertions, 0 deletions

diff --git a/src/audio/audio.cc b/src/audio/audio.cc
index 1895d21..ff0918d 100644
--- a/src/audio/audio.cc
+++ b/src/audio/audio.cc
@@ -91,4 +91,45 @@ void play(const char *name)
 	}
 }
 
+void update_source(size_t source_index, math::Vector3f const & location, math::Vector3f const & velocity, float pitch, float gain)
+{
+	ALuint source = Sources::source(source_index);
+	alSourcefv(source, AL_POSITION, location.ptr());
+	//alSourcefv(source, AL_VELOCITY, velocity.ptr());
+	alSourcef(source, AL_PITCH, pitch);
+    	alSourcef(source, AL_GAIN, gain);
+}
+
+void loop( size_t source_index, const char *name, float pitch, float gain)
+{
+	if (!audio_context)
+		return;
+
+	ALuint source = Sources::source(source_index);
+	Buffers::bind(source, Buffers::load(std::string(name)));
+
+	alSourcef(source, AL_PITCH, pitch);
+    	alSourcef(source, AL_GAIN, gain);
+
+ 	alSourcei(source, AL_LOOPING,  AL_TRUE);
+	alSourceRewind(source);
+	alSourcePlay(source);
+}
+
+void update_listener(math::Vector3f const &location, math::Axis const &axis, float speed)
+{
+	alListenerfv(AL_POSITION, location.ptr());
+
+	math::Vector3f velocity(axis.forward());
+	velocity = velocity * speed;
+	//alListenerfv(AL_VELOCITY, velocity.ptr());
+
+	ALfloat orientation[6];
+	for (size_t i =0; i <3; i++) {
+		orientation[i] = axis.forward()[i];
+		orientation[i+3] = axis.up()[i];
+	}
+	alListenerfv(AL_ORIENTATION, orientation);
+}
+	
 }
diff --git a/src/audio/audio.h b/src/audio/audio.h
index bf97a4a..629ae88 100644
--- a/src/audio/audio.h
+++ b/src/audio/audio.h
@@ -7,6 +7,8 @@
 #ifndef __INCLUDED_AUDIO_AUDIO_H__
 #define __INCLUDED_AUDIO_AUDIO_H__
 
+#include <iostream>
+
 #ifdef _WIN32
 #include <windows.h>
 #endif
@@ -14,6 +16,9 @@
 #include "AL/al.h"
 #include "AL/alc.h"
 
+#include "math/vector3f.h"
+#include "math/axis.h"
+
 /// functions to handle audio
 namespace audio
 {
@@ -30,6 +35,14 @@ void load(const char *name);
 /// play a previously loaded audio sample
 void play(const char *name);
 
+/// play a looping sound on a specified source
+void loop( size_t source_index, const char *name, float pitch=1.0f, float gain=1.0f);
+
+/// update source parameters
+void update_source(size_t source_index, math::Vector3f const & location, math::Vector3f const & velocity, float pitch=1.0f, float gain=1.0f);
+
+/// update listener parameters
+void update_listener(math::Vector3f const &location, math::Axis const &axis, float speed);
 }
 
 #endif // __INCLUDED_AUDIO_AUDIO_H__
diff --git a/src/audio/sources.cc b/src/audio/sources.cc
index 2c67304..3a6b3fc 100644
--- a/src/audio/sources.cc
+++ b/src/audio/sources.cc
@@ -53,4 +53,30 @@ void Sources::clear()
 	
 }
 
+size_t Sources::get()
+{
+	for (size_t i= MAXUISOURCES; i < MAXSOURCES; i++) {
+		if (source_available[i]) {
+			source_available[i] = false;
+ 			alSourcef(sources[i], AL_PITCH, 1.0);
+    			alSourcef(sources[i], AL_GAIN, 1.0);
+			//con_debug << "reserved source " << i << std::endl;
+			return i;
+		}
+	}
+	return 0;
+}
+
+void Sources::remove(size_t index)
+{
+	if ( (index < MAXUISOURCES ) || (MAXSOURCES <= index))
+		return;
+
+	source_available[index] = true;
+	alSourcef(sources[index], AL_GAIN, 0);
+	alSourceRewind(sources[index]);
+
+	//con_debug << "removed source " << index << std::endl;
+}
+
 }
diff --git a/src/audio/sources.h b/src/audio/sources.h
index 302d5d5..078c424 100644
--- a/src/audio/sources.h
+++ b/src/audio/sources.h
@@ -27,6 +27,10 @@ public:
 	static inline bool available(size_t index) { return source_available[index]; }
 
 	static inline ALuint source(size_t index) { return sources[index]; }
+
+	static size_t get();
+	static void remove(size_t index);
+
 private:
 	static void clear();