/* public domain */

struct apldma_channel *apldma_alloc_channel(unsigned int);
void    apldma_free_channel(struct apldma_channel *);
void    *apldma_allocm(struct apldma_channel *, size_t, int);
void    apldma_freem(struct apldma_channel *);
int     apldma_trigger_output(struct apldma_channel *, void *, void *, int,
            void (*)(void *), void *, struct audio_params *);
int     apldma_halt_output(struct apldma_channel *);