initial work on adding access to h/w control apps when ardour starts JACK

1 files changed, 15 insertions, 0 deletions

diff --git a/libs/ardour/ardour/audio_backend.h b/libs/ardour/ardour/audio_backend.h
index 4192f0ea8b..f598f1a93a 100644
--- a/libs/ardour/ardour/audio_backend.h
+++ b/libs/ardour/ardour/audio_backend.h
@@ -228,6 +228,21 @@ class AudioBackend {
     virtual uint32_t     systemic_input_latency () const = 0;
     virtual uint32_t     systemic_output_latency () const = 0;
 
+    /** Return true if it is possible to launch a control app
+     * at this time. Return false otherwise.
+     *
+     * The audio backend may not know the device for which the
+     * control app should be opened, or there may no such
+     * application. In such cases, this method should return false.
+     */
+    virtual bool have_control_app() const = 0;
+
+    /** If the device name has been set, launch an application (if any exist)
+     * to manage the hardware settings of that device. If no such application
+     * exists, do nothing.
+     */
+    virtual void launch_control_app () = 0;
+
     /* Basic state control */
 
     /** Start using the device named in the most recent call