Introduce 'unconfigure' callback

The 'unconfigure' callback can be used to clean up the 'configured'
state of an Audio Path, for when it is desired to reset the streams,
and/or reload a different stream configuration.

To destroy the streams, we must attempt to force their PCMs
closed. Take note though, that if a PCM is being written to when
an unconfigure command is issued, system instability may occur.

Signed-off-by: Mark Farrugia <mark.farrugia@fiberdyne.com.au>

1 files changed, 4 insertions, 0 deletions

diff --git a/core.h b/core.h
index 6f63e8c..c39002a 100644
--- a/core.h
+++ b/core.h
@@ -81,6 +81,8 @@ void snd_avirt_audiopath_destroy_obj(struct snd_avirt_audiopath_obj *p);
  */
 int snd_avirt_streams_configure(void);
 
+int snd_avirt_streams_unconfigure(void);
+
 /**
  * snd_avirt_streams_configured - Check if streams have been configured or not
  * @return: true if configured, false otherwise
@@ -122,6 +124,8 @@ int snd_avirt_route_try_complete(struct snd_avirt_route *route);
  * @return: 0 on success, negative ERRNO on failure
  */
 int snd_avirt_stream_try_complete(struct snd_avirt_stream *stream);
+void snd_avirt_stream_try_destroy(struct snd_avirt_stream *stream);
+
 /**
  * snd_avirt_stream_set_map - Set Audio Path mapping for a given stream
  * @stream: The stream to assign the mapping to.