#include <config.h>
#include <math.h>
+#include <stdexcept>
+#include <iostream>
-#include "ambient_sound.h"
-#include "object_factory.h"
-#include "lisp/lisp.h"
-#include "sector.h"
+#include "ambient_sound.hpp"
+#include "object_factory.hpp"
+#include "lisp/lisp.hpp"
+#include "sector.hpp"
+#include "audio/sound_manager.hpp"
+#include "audio/sound_source.hpp"
AmbientSound::AmbientSound(const lisp::Lisp& lisp)
{
-
position.x=0;
position.y=0;
+
+ dimension.x=0;
+ dimension.y=0;
+
distance_factor=0;
distance_bias=0;
maximumvolume=1;
if (!(lisp.get("x", position.x)&&lisp.get("y", position.y))) {
std::cerr << "No Position in ambient_sound" << std::endl;
}
+
+ lisp.get("width" , dimension.x);
+ lisp.get("height", dimension.y);
+
lisp.get("distance_factor",distance_factor);
lisp.get("distance_bias" ,distance_bias );
lisp.get("sample" ,sample );
lisp.get("volume" ,maximumvolume );
+ // set dimension to zero if smaller than 64, which is default size in flexlay
+
+ if ((dimension.x <= 64) || (dimension.y <= 64)) {
+ dimension.x = 0;
+ dimension.y = 0;
+ }
+
+ // square all distances (saves us a sqrt later)
+
distance_bias*=distance_bias;
distance_factor*=distance_factor;
+ // set default silence_distance
+
if (distance_factor == 0)
silence_distance = 10e99;
else
lisp.get("silence_distance",silence_distance);
- playing=-1; // not playing at the beginning
+ sound_source = 0; // not playing at the beginning
latency=0;
+}
+
+AmbientSound::AmbientSound(Vector pos, float factor, float bias, float vol, std::string file)
+{
+ position.x=pos.x;
+ position.y=pos.y;
+
+ dimension.x=0;
+ dimension.y=0;
+
+ distance_factor=factor*factor;
+ distance_bias=bias*bias;
+ maximumvolume=vol;
+ sample=file;
+
+ // set default silence_distance
+ if (distance_factor == 0)
+ silence_distance = 10e99;
+ else
+ silence_distance = 1/distance_factor;
+
+ sound_source = 0; // not playing at the beginning
+ latency=0;
}
AmbientSound::~AmbientSound() {
void
AmbientSound::stop_playing() {
- if (playing>=0) {
- Mix_HaltChannel(playing);
- playing=-1;
- }
+ delete sound_source;
+ sound_source = 0;
}
void
AmbientSound::start_playing()
{
- playing=sound_manager->play_sound(sample,-1);
- Mix_Volume(playing,0);
- currentvolume=targetvolume=1e-20;
+ try {
+ std::string filename = "sounds/";
+ filename += sample;
+ filename += ".wav";
+ sound_source = sound_manager->create_sound_source(filename);
+ if(!sound_source)
+ throw std::runtime_error("file not found");
+
+ sound_source->set_gain(0);
+ sound_source->set_looping(true);
+ currentvolume=targetvolume=1e-20;
+ sound_source->play();
+ } catch(std::exception& e) {
+ std::cerr << "Couldn't play '" << sample << "': " << e.what() << "\n";
+ delete sound_source;
+ sound_source = 0;
+ }
}
void
{
if (latency--<=0) {
- float dx=Sector::current()->player->get_pos().x-position.x;
- float dy=Sector::current()->player->get_pos().y-position.y;
- float sqrdistance=dx*dx+dy*dy;
+ float px,py;
+ float rx,ry;
+
+ // Player position
+
+ px=Sector::current()->player->get_pos().x;
+ py=Sector::current()->player->get_pos().y;
+
+ // Relate to which point in the area
+
+ rx=px<position.x?position.x:
+ (px<position.x+dimension.x?px:position.x+dimension.x);
+ ry=py<position.y?position.y:
+ (py<position.y+dimension.y?py:position.y+dimension.y);
+
+ // calculate square of distance
+
+ float sqrdistance=(px-rx)*(px-rx)+(py-ry)*(py-ry);
sqrdistance-=distance_bias;
+
+ // inside the bias: full volume (distance 0)
if (sqrdistance<0)
sqrdistance=0;
+ // calculate target volume - will never become 0
+
targetvolume=1/(1+sqrdistance*distance_factor);
+
float rise=targetvolume/currentvolume;
+
+ // rise/fall half life?
+
currentvolume*=pow(rise,deltat*10);
- currentvolume += 1e-30;
+ currentvolume += 1e-6; // volume is at least 1e-6 (0 would never rise)
- if (playing>=0) {
- Mix_Volume(playing,(int)(currentvolume*maximumvolume*MIX_MAX_VOLUME));
- if (sqrdistance>=silence_distance && currentvolume<0.05)
+ if (sound_source != 0) {
+
+ // set the volume
+ sound_source->set_gain(currentvolume*maximumvolume);
+
+ if (sqrdistance>=silence_distance && currentvolume<1e-3)
stop_playing();
latency=0;
} else {
start_playing();
latency=0;
}
- else
- latency=(int)(10*((sqrdistance-silence_distance)/silence_distance));
+ else // set a reasonable latency
+ latency=(int)(0.001/distance_factor);
+ //(int)(10*((sqrdistance-silence_distance)/silence_distance));
}
+ }
- }
- if (latency>0.001/distance_factor)
- latency=(int)(0.001/distance_factor);
+ // heuristically measured "good" latency maximum
+
+ // if (latency>0.001/distance_factor)
+ // latency=
}
void