SFML community forums

Help => Audio => Topic started by: seba174 on September 21, 2017, 09:43:57 pm

Title: Playing sounds simultaneously
Post by: seba174 on September 21, 2017, 09:43:57 pm

Hi,
i have a problem when trying to play few sounds simultaneously.

I am currently using this method:
SoundManager.h

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#pragma once
#include <SFML/Graphics.hpp>
#include <SFML/Audio.hpp>
#include <vector>
#include <map>

enum SoundsNames {Explosion};

class SoundManager
{
        std::vector<sf::Sound> sounds;
        std::map<SoundsNames, sf::SoundBuffer> soundBuffers;

        float soundsVolume;

public:
        SoundManager();

        void playSound(SoundsNames soundName);
};
 

SoundManager.cpp

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#include "SoundManager.h"

SoundManager::SoundManager()
{
        soundBuffers[SoundsNames::Explosion].loadFromFile("Sounds/Explosion.wav");
        soundsVolume = 100;
}

void SoundManager::playSound(SoundsNames soundName)
{
        sounds.push_back(sf::Sound(soundBuffers[soundName]));
        sounds[sounds.size() - 1].setVolume(soundsVolume);
        sounds[sounds.size() - 1].play();
}

 

When i use playSound() function after Player does specific action, it plays sound properly. But the problem is, that when i use playSound() and then after a short time (when the sound hasn't finished yet) use it again, the new sound of course starts, but that one which hasn't finished yet can't be heard (it just stops).
Is there any method to solve this?

Thanks in advance for all replies.
seba174

Title: Re: Playing sounds simultaneously
Post by: Hapax on September 21, 2017, 10:22:12 pm

It could be the vector resizing as that would cause it to have to move the elements to a place that would fit them all. When an sf::Sound is moved, it is stopped.

A couple of solutions to this are: 'pre-size' the vector to a size that would cover however many sounds might be playing at once (pre-size here means to resize or reserve the vector), or use an std::list (http://www.cplusplus.com/reference/list/list/) or std::forward_list (http://www.cplusplus.com/reference/forward_list/forward_list/) instead of a vector.

Title: Re: Playing sounds simultaneously
Post by: seba174 on September 21, 2017, 10:39:37 pm

Yeah, you are right. I changed std::vector for std::list, and that did the trick. Now everything works as intended.
Thanks a lot for help.
Regards,
Sebastian