Fix playback alignment when adding/removing channels

The disk-reader assumes that all playback ringbuffers are in sync
and have the same fill_level.

3 files changed, 5 insertions, 0 deletions

diff --git a/libs/ardour/ardour/disk_io.h b/libs/ardour/ardour/disk_io.h
index 83e5dd3f9b..39c8b16ec4 100644
--- a/libs/ardour/ardour/disk_io.h
+++ b/libs/ardour/ardour/disk_io.h
@@ -113,6 +113,7 @@ public:
 protected:
 	friend class Auditioner;
 	virtual int  seek (samplepos_t which_sample, bool complete_refill = false) = 0;
+	virtual void configuration_changed () = 0;
 
 protected:
 	Flag         _flags;
diff --git a/libs/ardour/ardour/disk_reader.h b/libs/ardour/ardour/disk_reader.h
index 2e1ab6aec6..9db4266daa 100644
--- a/libs/ardour/ardour/disk_reader.h
+++ b/libs/ardour/ardour/disk_reader.h
@@ -223,6 +223,8 @@ private:
 	void get_midi_playback (MidiBuffer& dst, samplepos_t start_sample, samplepos_t end_sample, MonitorState, BufferSet&, double speed, samplecnt_t distance);
 	void maybe_xfade_loop (Sample*, samplepos_t read_start, samplepos_t read_end, ReaderChannelInfo*);
 
+	void configuration_changed ();
+
 	bool overwrite_existing_audio ();
 	bool overwrite_existing_midi ();
 };
diff --git a/libs/ardour/ardour/disk_writer.h b/libs/ardour/ardour/disk_writer.h
index 31a64cd0e8..2bd753a006 100644
--- a/libs/ardour/ardour/disk_writer.h
+++ b/libs/ardour/ardour/disk_writer.h
@@ -145,6 +145,8 @@ protected:
 
 	int do_flush (RunContext context, bool force = false);
 
+	void configuration_changed ();
+
 private:
 	static samplecnt_t _chunk_samples;