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pre-process (silence) before export to flush reverb tails etc.

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This commit is contained in:
Robin Gareus 2016-02-29 13:50:56 +01:00
parent 56c32a1e77
commit 33545e552b
3 changed files with 24 additions and 8 deletions
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2
libs/ardour/ardour/session.h
View file

@ -1195,8 +1195,8 @@ class LIBARDOUR_API Session : public PBD::StatefulDestructible, public PBD::Scop
framepos_t post_export_position;
bool _exporting;
bool _export_started;
bool _export_rolling;
framepos_t _export_preroll;
boost::shared_ptr<ExportHandler> export_handler;
boost::shared_ptr<ExportStatus> export_status;

2
libs/ardour/session.cc
View file

@ -204,8 +204,8 @@ Session::Session (AudioEngine &eng,
, post_export_sync (false)
, post_export_position (0)
, _exporting (false)
, _export_started (false)
, _export_rolling (false)
, _export_preroll (0)
, _pre_export_mmc_enabled (false)
, _name (snapshot_name)
, _is_new (true)

28
libs/ardour/session_export.cc
View file

@ -73,12 +73,16 @@ Session::pre_export ()
}
}
/* make sure we are actually rolling */
/* prepare transport */
realtime_stop (true, true);
if (get_record_enabled()) {
disable_record (false);
}
unset_play_loop ();
/* no slaving */
post_export_sync = config.get_external_sync ();
@ -105,7 +109,8 @@ Session::start_audio_export (framepos_t position)
if (!_exporting) {
pre_export ();
}
_export_started = false;
_export_preroll = 10.0 * nominal_frame_rate (); // TODO make configurable
/* We're about to call Track::seek, so the butler must have finished everything
up otherwise it could be doing do_refill in its thread while we are doing
@ -190,8 +195,19 @@ Session::process_export (pframes_t nframes)
int
Session::process_export_fw (pframes_t nframes)
{
if (!_export_started) {
_export_started = true;
if (_export_preroll > 0) {
_engine.main_thread()->get_buffers ();
fail_roll (nframes);
_engine.main_thread()->drop_buffers ();
_export_preroll -= std::min ((framepos_t)nframes, _export_preroll);
if (_export_preroll > 0) {
// clear out buffers (reverb tails etc).
return 0;
}
set_transport_speed (1.0, 0, false);
butler_transport_work ();
g_atomic_int_set (&_butler->should_do_transport_work, 0);
@ -199,9 +215,9 @@ Session::process_export_fw (pframes_t nframes)
return 0;
}
_engine.main_thread()->get_buffers ();
_engine.main_thread()->get_buffers ();
process_export (nframes);
_engine.main_thread()->drop_buffers ();
_engine.main_thread()->drop_buffers ();
return 0;
}