fix issues with recording while synced to JACK (non-pure-virtual method added to AudioBackend) and remove pause() from AudioEngine/AudioBackend APIs

1 files changed, 15 insertions, 14 deletions

diff --git a/libs/ardour/ardour/audio_backend.h b/libs/ardour/ardour/audio_backend.h
index 21f050afdd..26ced33885 100644
--- a/libs/ardour/ardour/audio_backend.h
+++ b/libs/ardour/ardour/audio_backend.h
@@ -327,20 +327,6 @@ class AudioBackend : public PortEngine {
      */
     virtual int stop () = 0;
 
-    /** Temporarily cease using the device named in the most recent call to set_parameters().
-     *
-     * If the function is successfully called, no subsequent calls to the
-     * process_callback() of @param engine will be made after the function
-     * returns, until start() is called again.
-     * 
-     * The backend will retain its existing parameter configuration after a successful
-     * return, and does NOT require any calls to set hardware parameters before it can be
-     * start()-ed again. 
-     *
-     * Return zero if successful, 1 if the device is not in use, negative values on error
-     */
-    virtual int pause () = 0;
-
     /** While remaining connected to the device, and without changing its
      * configuration, start (or stop) calling the process_callback() of @param engine
      * without waiting for the device. Once process_callback() has returned, it
@@ -478,6 +464,21 @@ class AudioBackend : public PortEngine {
 
     virtual void update_latencies () = 0;
 
+    /** Set @param speed and @param position to the current speed and position
+     * indicated by some transport sync signal.  Return whether the current
+     * transport state is pending, or finalized.
+     *
+     * Derived classes only need implement this if they provide some way to
+     * sync to a transport sync signal (e.g. Sony 9 Pin) that is not
+     * handled by Ardour itself (LTC and MTC are both handled by Ardour).
+     * The canonical example is JACK Transport.
+     */
+     virtual bool speed_and_position (double& speed, framepos_t& position) {
+	     speed = 0.0;
+	     position = 0;
+	     return false;
+     }
+
   protected:
     AudioEngine&          engine;
 };