1#ifndef __USBAUDIO_URB_H 2#define __USBAUDIO_URB_H 3 4void snd_usb_init_substream(struct snd_usb_stream *as, 5 int stream, 6 struct audioformat *fp); 7 8int snd_usb_init_substream_urbs(struct snd_usb_substream *subs, 9 unsigned int period_bytes, 10 unsigned int rate, 11 unsigned int frame_bits); 12 13void snd_usb_release_substream_urbs(struct snd_usb_substream *subs, int force); 14 15int snd_usb_substream_prepare(struct snd_usb_substream *subs, 16 struct snd_pcm_runtime *runtime); 17 18int snd_usb_substream_playback_trigger(struct snd_pcm_substream *substream, int cmd); 19int snd_usb_substream_capture_trigger(struct snd_pcm_substream *substream, int cmd); 20 21#endif /* __USBAUDIO_URB_H */ 22