capture: Implement per-stream volume control for capture streams.

This piggy backs onto the previous changes for protocol 22 and
thus does not bump the version. This and the previous commits should be
seen as mostly atomic. Apologies for any bisecting issues this causes
(although I would expect these to be minimal)

1 files changed, 8 insertions, 0 deletions

diff --git a/PROTOCOL b/PROTOCOL
index 03a9cb5cf..9c6c8a8b9 100644
--- a/PROTOCOL
+++ b/PROTOCOL
@@ -262,3 +262,11 @@ PA_COMMAND_GET_SOURCE_INFO_LIST)
     format_info format1
     ...
     format_info formatn
+
+Four new fields in reply from PA_COMMAND_GET_SOURCE_OUTPUT_INFO (and thus
+PA_COMMAND_GET_SOURCE_OUTPUT_INFO_LIST)
+
+    volume
+    bool mute
+    bool has_volume
+    bool volume_writable