+void
+AudioSource::ensure_buffers_for_level (uint32_t level, framecnt_t frame_rate)
+{
+ Glib::Threads::Mutex::Lock lm (_level_buffer_lock);
+ ensure_buffers_for_level_locked (level, frame_rate);
+}
+
+void
+AudioSource::ensure_buffers_for_level_locked (uint32_t level, framecnt_t frame_rate)
+{
+ framecnt_t nframes = (framecnt_t) floor (Config->get_audio_playback_buffer_seconds() * frame_rate);
+
+ _mixdown_buffers.clear ();
+ _gain_buffers.clear ();
+
+ while (_mixdown_buffers.size() < level) {
+ _mixdown_buffers.push_back (boost::shared_ptr<Sample> (new Sample[nframes]));
+ _gain_buffers.push_back (boost::shared_ptr<gain_t> (new gain_t[nframes]));
+ }
+}