Rework routing system

- Add 'route' to snd_avirt_stream, remove from audio path
- Add route checking - ensure that source ap and ink ap have
compatible hw params
- Add private data support for both source and sink Audio
Paths, to ensure that the PCM can hold multiple private data(s).
- Add ability to use copy_kernel and exttriggers from AVIRT instead of from Audio Paths
- Reintroduce pcm_trigger and pcm_prepare, so that 
they may be called appropriately from AVIRT, rather
than child Audio Paths.

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

1 files changed, 12 insertions, 0 deletions

diff --git a/core.h b/core.h
index e4fb7a4..f915c04 100644
--- a/core.h
+++ b/core.h
@@ -128,6 +128,18 @@ struct snd_avirt_audiopath *snd_avirt_audiopath_get(const char *uid);
 struct snd_avirt_route *snd_avirt_route_create(const char *name, int direction);
 
 /**
+ * snd_avirt_route_endpoint_pos - get route endpoint position for Audio Path
+ * @pcm: The PCM whose route to inspect.
+ * @ap_uid: The Audio Path UID to get
+ * @endpoint: The route position (SND_AVIRT_ROUTE_SOURCE or SND_AVIRT_ROUTE_SINK)
+ *            of the Audio Path in it's route (if any).
+ * @return: 0 if an Audio Path is found in the route, -1 if there is no route,
+ *          or -2 otherwise.
+ */
+int snd_avirt_route_endpoint_pos(struct snd_pcm *pcm, const char *ap_uid,
+				 snd_avirt_route_endpoint *endpoint);
+
+/**
  * snd_avirt_stream_from_config_item - Convert config_item to a snd_avirt_stream
  * @item: The config_item to convert from
  * @return: The item's snd_avirt_stream if successful, NULL otherwise