Add private data structure to PCM for audio path management

Expand upon the private data structure currently used by avirt
to allow audio paths to store own user data to PCM implementation.

Signed-off-by: James O'Shannessy <james.oshannessy@fiberdyne.com.au>

1 files changed, 10 insertions, 0 deletions

diff --git a/sound/avirt.h b/sound/avirt.h
index 55db1eb..52d2404 100644
--- a/sound/avirt.h
+++ b/sound/avirt.h
@@ -64,6 +64,16 @@ struct snd_avirt_stream {
 };
 
 /**
+ * Private Data Expansion
+ */
+struct snd_avirt_private_data {
+	void *audiopath;
+	void *ap_userdata;
+
+	void (*private_free)(struct snd_pcm *pcm);
+};
+
+/**
  * Audio stream group
  */
 struct snd_avirt_stream_array {