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LTC generator - reinit on xrun or graph-reorder 

git-svn-id: svn://localhost/ardour2/branches/3.0@13351 d708f5d6-7413-0410-9779-e7cbd77b26cf
This commit is contained in:
Robin Gareus 2012-10-26 11:39:13 +00:00
parent 0047b87e3d
commit 3ddfc76224
2 changed files with 27 additions and 6 deletions
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2
libs/ardour/ardour/session.h
View File

@ -1202,6 +1202,8 @@ class Session : public PBD::StatefulDestructible, public PBD::ScopedConnectionLi
double ltc_enc_cnt;
framepos_t ltc_enc_off;
jack_latency_range_t ltc_out_latency;
void ltc_tx_initialize();
void ltc_tx_cleanup();
void ltc_tx_reset();

31
libs/ardour/session_ltc.cc
View File

@ -58,6 +58,8 @@ Session::ltc_tx_initialize()
ltc_enc_buf = (ltcsnd_sample_t*) calloc((nominal_frame_rate() / 23), sizeof(ltcsnd_sample_t));
ltc_speed = 0;
ltc_tx_reset();
Xrun.connect_same_thread (*this, boost::bind (&Session::ltc_tx_reset, this));
engine().GraphReordered.connect_same_thread (*this, boost::bind (&Session::ltc_tx_reset, this));
}
void
@ -78,6 +80,11 @@ Session::ltc_tx_reset()
ltc_buf_off = 0;
ltc_enc_byte = 0;
ltc_enc_cnt = 0;
boost::shared_ptr<Port> ltcport = ltc_output_port();
if (ltcport) {
ltcport->get_connected_latency_range(ltc_out_latency, true);
}
}
void
@ -113,7 +120,7 @@ Session::ltc_tx_send_time_code_for_cycle (framepos_t start_frame, framepos_t end
boost::shared_ptr<Port> ltcport = ltc_output_port();
Buffer& buf (ltcport->get_buffer (nframes));
if (!ltc_encoder || !ltc_enc_buf) {
return;
}
@ -138,9 +145,17 @@ Session::ltc_tx_send_time_code_for_cycle (framepos_t start_frame, framepos_t end
/* range from libltc (38..218) || - 128.0 -> (-90..90) */
const float ltcvol = Config->get_ltc_output_volume()/(90.0); // pow(10, db/20.0)/(90.0);
jack_latency_range_t ltc_latency;
ltcport->get_connected_latency_range(ltc_latency, true);
DEBUG_TRACE (DEBUG::LTC, string_compose("LTC TX %1 to %2 / %3 | lat: %4\n", start_frame, end_frame, nframes, ltc_latency.max));
#if 1
/* TODO read layency only on demand -> ::ltc_tx_reset()
* this is already prepared.
*
* ..but first fix jack2 issue with re-computing latency
* in the correct order. Until then, querying it in the
* process-callback is the only way to get the current value
*/
ltcport->get_connected_latency_range(ltc_out_latency, true);
#endif
DEBUG_TRACE (DEBUG::LTC, string_compose("LTC TX %1 to %2 / %3 | lat: %4\n", start_frame, end_frame, nframes, ltc_out_latency.max));
/* all systems go. Now here's the plan:
*
@ -175,6 +190,10 @@ Session::ltc_tx_send_time_code_for_cycle (framepos_t start_frame, framepos_t end
}
// (2) speed & direction
/* speed 0 aka transport stopped is interpreted as rolling forward.
* keep repeating current frame
*/
#define SIGNUM(a) ( (a) < 0 ? -1 : 1)
bool speed_changed = false;
@ -183,7 +202,7 @@ Session::ltc_tx_send_time_code_for_cycle (framepos_t start_frame, framepos_t end
/* The generated timecode is offset by the port-latency,
* therefore the offset depends on the direction of transport.
*/
framepos_t cycle_start_frame = (current_speed < 0) ? (start_frame + ltc_latency.max) : (start_frame - ltc_latency.max);
framepos_t cycle_start_frame = (current_speed < 0) ? (start_frame + ltc_out_latency.max) : (start_frame - ltc_out_latency.max);
#else
/* This comes in handy when testing sync - record output on an A3 track
* see also http://tracker.ardour.org/view.php?id=5073
@ -510,7 +529,7 @@ Session::ltc_tx_send_time_code_for_cycle (framepos_t start_frame, framepos_t end
DEBUG_TRACE (DEBUG::LTC, string_compose("LTC TX6.4 enc-pos: %1 + %2 [ %4 / %5 ] spd %6\n", ltc_enc_pos, ltc_enc_cnt, ltc_buf_off, ltc_buf_len, ltc_speed));
#endif
}
dynamic_cast<AudioBuffer*>(&buf)->set_written (true);
return;
}