Function LoadLibSampleRate

deps/SDL2/src/audio/SDL_audio.c:129–178

const char* (*SRC_src_strerror)(int error) = NULL;

static SDL_bool
LoadLibSampleRate(void)
{
    const char *hint = SDL_GetHint(SDL_HINT_AUDIO_RESAMPLING_MODE);

    SRC_available = SDL_FALSE;
    SRC_converter = 0;

    if (!hint || *hint == '0' || SDL_strcasecmp(hint, "default") == 0) {
        return SDL_FALSE;  /* don't load anything. */
    } else if (*hint == '1' || SDL_strcasecmp(hint, "fast") == 0) {
        SRC_converter = SRC_SINC_FASTEST;
    } else if (*hint == '2' || SDL_strcasecmp(hint, "medium") == 0) {
        SRC_converter = SRC_SINC_MEDIUM_QUALITY;
    } else if (*hint == '3' || SDL_strcasecmp(hint, "best") == 0) {
        SRC_converter = SRC_SINC_BEST_QUALITY;
    } else {
        return SDL_FALSE;  /* treat it like "default", don't load anything. */
    }

#ifdef SDL_LIBSAMPLERATE_DYNAMIC
    SDL_assert(SRC_lib == NULL);
    SRC_lib = SDL_LoadObject(SDL_LIBSAMPLERATE_DYNAMIC);
    if (!SRC_lib) {
        SDL_ClearError();
        return SDL_FALSE;
    }

    SRC_src_new = (SRC_STATE* (*)(int converter_type, int channels, int *error))SDL_LoadFunction(SRC_lib, "src_new");
    SRC_src_process = (int (*)(SRC_STATE *state, SRC_DATA *data))SDL_LoadFunction(SRC_lib, "src_process");
    SRC_src_reset = (int(*)(SRC_STATE *state))SDL_LoadFunction(SRC_lib, "src_reset");
    SRC_src_delete = (SRC_STATE* (*)(SRC_STATE *state))SDL_LoadFunction(SRC_lib, "src_delete");
    SRC_src_strerror = (const char* (*)(int error))SDL_LoadFunction(SRC_lib, "src_strerror");

    if (!SRC_src_new || !SRC_src_process || !SRC_src_reset || !SRC_src_delete || !SRC_src_strerror) {
        SDL_UnloadObject(SRC_lib);
        SRC_lib = NULL;
        return SDL_FALSE;
    }
#else
    SRC_src_new = src_new;
    SRC_src_process = src_process;
    SRC_src_reset = src_reset;
    SRC_src_delete = src_delete;
    SRC_src_strerror = src_strerror;
#endif

    SRC_available = SDL_TRUE;
    return SDL_TRUE;
}

static void
UnloadLibSampleRate(void)