Function SDL_BufferQueueFillCallback

deps/SDL2/src/audio/SDL_audio.c:581–595

}

static void SDLCALL
SDL_BufferQueueFillCallback(void *userdata, Uint8 *stream, int len)
{
    /* this function always holds the mixer lock before being called. */
    SDL_AudioDevice *device = (SDL_AudioDevice *) userdata;

    SDL_assert(device != NULL);  /* this shouldn't ever happen, right?! */
    SDL_assert(device->iscapture);  /* this shouldn't ever happen, right?! */
    SDL_assert(len >= 0);  /* this shouldn't ever happen, right?! */

    /* note that if this needs to allocate more space and run out of memory,
       we have no choice but to quietly drop the data and hope it works out
       later, but you probably have bigger problems in this case anyhow. */
    SDL_WriteToDataQueue(device->buffer_queue, stream, len);
}

int
SDL_QueueAudio(SDL_AudioDeviceID devid, const void *data, Uint32 len)