- es1688_t ** rchip);
-int snd_es1688_pcm(es1688_t *chip, int device, snd_pcm_t ** rpcm);
-int snd_es1688_mixer(es1688_t *chip);
+ struct snd_es1688 ** rchip);
+int snd_es1688_pcm(struct snd_es1688 *chip, int device, struct snd_pcm ** rpcm);
+int snd_es1688_mixer(struct snd_es1688 *chip);