I'm working on my project in SDL, with SDL_mixer. Everything sounds ok, but when I attempt to quit, my app crash. I think that it's related to Mix_FreeMusic function (I figured that out after using a lot of breakpoints) - I marked that line in code below:
In main.cpp, function RunEverything,
//sound-related code:
if(SDL_Init(SDL_INIT_EVERYTHING) == -1) { printf("error: %s\n", SDL_GetError()); return NULL; }
int audio_rate = 22050;
Uint16 audio_format = AUDIO_S16; /* 16-bit stereo */
int audio_channels = 2;
int audio_buffers = 4096;
if(Mix_OpenAudio(audio_rate, audio_format, audio_channels, audio_buffers)) { printf("Unable to open audio!\n"); return NULL; }
Later in main.cpp:
int Screen_MainMenu(SDL_Surface *screen)
{
SDL_Event event;
CL_Menu Menu;
/* ... */
Mix_AllocateChannels(2);
Mix_PlayMusic(Menu.mMusic, -1);
while(quit==false)
{
// some time-management, drawing stuff on screen etc., nothing audio-related
while(SDL_PollEvent(&event))
{
switch(event.type)
{
case SDL_KEYDOWN:
switch(event.key.keysym.sym)
{
case SDLK_ESCAPE:
quit = true;
break;
case SDLK_UP:
Menu.kKlik = Mix_PlayChannel(-1, Menu.mKlik, 0);
break;
case SDLK_DOWN:
Menu.kKlik = Mix_PlayChannel(-1, Menu.mKlik, 0);
break;
}
break;
case SDL_QUIT:
quit = true;
break;
}
}
}
Menu.FreeMem();
return 0;
in class.h:
class CL_Menu
{
public:
// some SDL_Surface & TTF_Font
Mix_Music *mMusic;
int kKlik;
Mix_Chunk *mKlik;
CL_Menu();
void FreeMem();
};
in class.cpp:
CL_Menu::CL_Menu()
{
//loading .png & .ttf
mMusic = Mix_LoadMUS("MP3/Sirio-Dance_Of_Stars.mp3");
mKlik = Mix_LoadWAV("MP3/klik.wav");
};
void CL_Menu::FreeMem()
{
//while(Mix_Playing(kKlik) != 0);
Mix_HaltChannel(kKlik);
Mix_HaltMusic();
Mix_FreeChunk(mKlik);
// CloseFont & FreeSurface
Mix_HaltMusic();
SDL_Delay(100);
Mix_FreeMusic(mMusic); // <-- that line probably causes crash
mMusic = NULL;
};
I'm using win7 x64, Visual Studio 2010 and latest SDL libs. Also I noticed, that when I close my program within 10-15 seconds, it works fine. Only when it runs about 20-30 seconds, I get a crash.
edit: If it's important, my mp3 is rather big - about 9 MB (192 kb/s)
Finally I managed to figure it out, so I'm writing a solution that worked in my case. I had to convert my .mp3 file to .ogg. And that's all. Probably that mp3 file was somehow corrupted, or it was an error in the SDL library.