Commit 81ebb07c authored by Kővágó, Zoltán's avatar Kővágó, Zoltán Committed by Gerd Hoffmann
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sdlaudio: do not allow multiple instances 



Since SDL uses a lot of global data, we can't create independent
instances of sdl audio backend.

Signed-off-by: default avatarKővágó, Zoltán <DirtY.iCE.hu@gmail.com>
Signed-off-by: default avatarGerd Hoffmann <kraxel@redhat.com>
parent d1f52a1d

audio/sdlaudio.c

+7 −0
Original line number Diff line number Diff line
@@ -55,6 +55,7 @@ static struct SDLAudioState { 
    SDL_mutex *mutex;

    SDL_sem *sem;

    int initialized;

    bool driver_created;

} glob_sdl;

typedef struct SDLAudioState SDLAudioState;
@@ -393,6 +394,10 @@ static int sdl_ctl_out (HWVoiceOut *hw, int cmd, ...) 
static void *sdl_audio_init (void)

{

    SDLAudioState *s = &glob_sdl;

    if (s->driver_created) {

        sdl_logerr("Can't create multiple sdl backends\n");

        return NULL;

    }



    if (SDL_InitSubSystem (SDL_INIT_AUDIO)) {

        sdl_logerr ("SDL failed to initialize audio subsystem\n");
@@ -414,6 +419,7 @@ static void *sdl_audio_init (void) 
        return NULL;

    }



    s->driver_created = true;

    return s;

}
@@ -424,6 +430,7 @@ static void sdl_audio_fini (void *opaque) 
    SDL_DestroySemaphore (s->sem);

    SDL_DestroyMutex (s->mutex);

    SDL_QuitSubSystem (SDL_INIT_AUDIO);

    s->driver_created = false;

}



static struct audio_option sdl_options[] = {