ALSA: usb-audio: refactor code

[cascardo/linux.git] / sound / usb / urb.h

diff --git a/sound/usb/urb.h b/sound/usb/urb.h
new file mode 100644 (file)
index 0000000..888da38
--- /dev/null
+++ b/sound/usb/urb.h
@@ -0,0 +1,21 @@
+#ifndef __USBAUDIO_URB_H
+#define __USBAUDIO_URB_H
+
+void snd_usb_init_substream(struct snd_usb_stream *as,
+                           int stream,
+                           struct audioformat *fp);
+
+int snd_usb_init_substream_urbs(struct snd_usb_substream *subs,
+                               unsigned int period_bytes,
+                               unsigned int rate,
+                               unsigned int frame_bits);
+
+void snd_usb_release_substream_urbs(struct snd_usb_substream *subs, int force);
+
+int snd_usb_substream_prepare(struct snd_usb_substream *subs,
+                             struct snd_pcm_runtime *runtime);
+
+int snd_usb_substream_playback_trigger(struct snd_pcm_substream *substream, int cmd);
+int snd_usb_substream_capture_trigger(struct snd_pcm_substream *substream, int cmd);
+
+#endif /* __USBAUDIO_URB_H */