amlogic-aml8726-mx-kernel/sound/usb/pcm.h

#ifndef __USBAUDIO_PCM_H
#define __USBAUDIO_PCM_H

void snd_usb_set_pcm_ops(struct snd_pcm *pcm, int stream);

int snd_usb_init_pitch(struct snd_usb_audio *chip, int iface,
		       struct usb_host_interface *alts,
		       struct audioformat *fmt);


#endif /* __USBAUDIO_PCM_H */