LTC generator update
git-svn-id: svn://localhost/ardour2/branches/3.0@13325 d708f5d6-7413-0410-9779-e7cbd77b26cf
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@ -1187,15 +1187,19 @@ class Session : public PBD::StatefulDestructible, public PBD::ScopedConnectionLi
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ltcsnd_sample_t* ltc_enc_buf;
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Timecode::TimecodeFormat ltc_enc_tcformat;
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framepos_t ltc_enc_pos;
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int32_t ltc_buf_off;
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int32_t ltc_buf_len;
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int32_t ltc_enc_byte;
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double ltc_speed;
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int32_t ltc_enc_byte;
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framepos_t ltc_enc_pos;
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double ltc_enc_cnt;
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framepos_t ltc_enc_off;
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void ltc_tx_initialize();
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void ltc_tx_cleanup();
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void ltc_tx_reset();
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void ltc_tx_recalculate_position();
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int ltc_tx_send_time_code_for_cycle (framepos_t, framepos_t, double, double, pframes_t nframes);
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#endif
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@ -31,7 +31,9 @@ using namespace MIDI;
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using namespace PBD;
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using namespace Timecode;
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/* really verbose timing debug */
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//#define LTC_GEN_FRAMEDBUG
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//#define LTC_GEN_TXDBUG
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void
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Session::ltc_tx_initialize()
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@ -67,21 +69,41 @@ void
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Session::ltc_tx_reset()
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{
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DEBUG_TRACE (DEBUG::LTC, "LTC TX reset\n");
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ltc_enc_pos = -1; // force re-start
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ltc_enc_pos = -9999; // force re-start
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ltc_buf_len = 0;
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ltc_buf_off = 0;
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ltc_enc_byte = 0;
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ltc_enc_cnt = 0;
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}
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void
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Session::ltc_tx_recalculate_position()
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{
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SMPTETimecode enctc;
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Timecode::Time a3tc;
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ltc_encoder_get_timecode(ltc_encoder, &enctc);
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a3tc.hours = enctc.hours;
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a3tc.minutes = enctc.mins;
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a3tc.seconds = enctc.secs;
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a3tc.frames = enctc.frame;
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a3tc.rate = timecode_to_frames_per_second(ltc_enc_tcformat);
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a3tc.drop = timecode_has_drop_frames(ltc_enc_tcformat);
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Timecode::timecode_to_sample (a3tc, ltc_enc_pos, true, false,
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double(frame_rate()),
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config.get_subframes_per_frame(),
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config.get_timecode_offset_negative(), config.get_timecode_offset()
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);
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}
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int
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Session::ltc_tx_send_time_code_for_cycle (framepos_t start_frame, framepos_t end_frame,
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Session::ltc_tx_send_time_code_for_cycle (framepos_t start_frame, framepos_t end_frame,
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double target_speed, double current_speed,
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pframes_t nframes)
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{
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assert(nframes > 0);
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const float smult = 2.0/(3.0*255.0);
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SMPTETimecode tc;
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jack_default_audio_sample_t *out;
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pframes_t txf = 0;
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boost::shared_ptr<Port> ltcport = engine().ltc_output_port();
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@ -91,7 +113,14 @@ Session::ltc_tx_send_time_code_for_cycle (framepos_t start_frame, framepos_t end
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out = (jack_default_audio_sample_t*) jack_port_get_buffer (ltcport->jack_port(), nframes);
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if (!out) return 0;
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if (engine().freewheeling() || !Config->get_send_ltc()) {
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if (engine().freewheeling()|| !Config->get_send_ltc()
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/* TODO
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* we can relax this a bit, JACK or sample-synced slaves should be fine.
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* test before allowing it, do the same for MTC generator in
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* libs/ardour/session_midi.cc
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* */
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// || config.get_external_sync() // XXX XXX
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) {
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memset(out, 0, nframes * sizeof(jack_default_audio_sample_t));
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return nframes;
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}
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@ -99,10 +128,14 @@ Session::ltc_tx_send_time_code_for_cycle (framepos_t start_frame, framepos_t end
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/* range from libltc (38..218) || - 128.0 -> (-90..90) */
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const float ltcvol = Config->get_ltc_output_volume()/(90.0); // pow(10, db/20.0)/(90.0);
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jack_latency_range_t ltc_latency;
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ltcport->get_connected_latency_range(ltc_latency, true);
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DEBUG_TRACE (DEBUG::LTC, string_compose("LTC TX %1 to %2 / %3 | lat: %4\n", start_frame, end_frame, nframes, ltc_latency.max));
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/* all systems go. Now here's the plan:
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*
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* 1) check if fps has changed
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* 2) check direction of encoding, calc speed
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* 2) check direction of encoding, calc speed, resample existing buffer
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* 3) calculate frame and byte to send aligned to jack-period size
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* 4) check if it's the frame/byte that is already in the queue
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* 5) if (4) mismatch, re-calculate offset of LTC frame relative to period size
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@ -113,7 +146,7 @@ Session::ltc_tx_send_time_code_for_cycle (framepos_t start_frame, framepos_t end
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* 7) done
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*/
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// (1)
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// (1) check fps
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TimecodeFormat cur_timecode = config.get_timecode_format();
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if (cur_timecode != ltc_enc_tcformat) {
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DEBUG_TRACE (DEBUG::LTC, string_compose("LTC TX1: TC format mismatch - reinit sr: %1 fps: %2\n", nominal_frame_rate(), timecode_to_frames_per_second(cur_timecode)));
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@ -132,29 +165,36 @@ Session::ltc_tx_send_time_code_for_cycle (framepos_t start_frame, framepos_t end
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return nframes;
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}
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// (2)
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// (2) speed & direction
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#define SIGNUM(a) ( (a) < 0 ? -1 : 1)
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bool speed_changed = false;
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// XXX
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//framepos_t cycle_start_frame = (current_speed < 0) ? (start_frame - ltc_latency.max) : (start_frame + ltc_latency.max);
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framepos_t cycle_start_frame = start_frame;
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/* cycle-start may become negative due to latency comensation */
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if (cycle_start_frame < 0) { cycle_start_frame = 0; }
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framepos_t cycle_start_frame = (current_speed < 0) ? end_frame :start_frame;
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double new_ltc_speed = double(labs(end_frame - start_frame) * SIGNUM(current_speed)) / double(nframes);
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if (SIGNUM(new_ltc_speed) != SIGNUM (ltc_speed)) {
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// transport changed direction
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DEBUG_TRACE (DEBUG::LTC, "LTC TX2: transport direction changed\n");
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DEBUG_TRACE (DEBUG::LTC, "LTC TX2: transport changed direction\n");
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ltc_tx_reset();
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}
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if (ltc_speed != current_speed || target_speed != fabs(current_speed)) {
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/* TODO check ./libs/ardour/interpolation.cc CubicInterpolation::interpolate
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if (ltc_speed != new_ltc_speed) {
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/* check ./libs/ardour/interpolation.cc CubicInterpolation::interpolate
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* if target_speed != current_speed we should interpolate, too.
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*
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* However, currenly in A3 target_speed == current_speed for each process cycle
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* (except for the sign). Besides, above speed calulation uses the
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* difference (end_frame - start_frame).
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* (except for the sign and if target_speed > 8.0).
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* Besides, above speed calulation uses the difference (end_frame - start_frame).
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* end_frame is calculated from 'frames_moved' which includes the interpolation.
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* so we're good, except for the fact that each LTC byte is sent at fixed speed.
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* so we're good.
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*/
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DEBUG_TRACE (DEBUG::LTC, string_compose("LTC TX2: speed change old: %1 cur: %2 tgt: %3 ctd: %4\n", ltc_speed, current_speed, target_speed, fabs(current_speed) - target_speed));
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speed_changed = true;
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}
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if (end_frame == start_frame || fabs(current_speed) < 0.1 ) {
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@ -168,36 +208,104 @@ Session::ltc_tx_send_time_code_for_cycle (framepos_t start_frame, framepos_t end
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* If LTC keeps arriving they remain in a stop position with the tape on the playhead.
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*/
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new_ltc_speed = 0;
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if (!Config->get_ltc_send_continuously()) {
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ltc_speed = new_ltc_speed;
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memset(out, 0, nframes * sizeof(jack_default_audio_sample_t));
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return nframes;
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}
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}
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ltc_speed = new_ltc_speed;
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DEBUG_TRACE (DEBUG::LTC, string_compose("LTC TX2: transport speed %1.\n", ltc_speed));
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if (fabs(ltc_speed) > 10.0) {
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if (fabs(new_ltc_speed) > 10.0) {
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DEBUG_TRACE (DEBUG::LTC, "LTC TX2: speed is out of bounds.\n");
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ltc_tx_reset();
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memset(out, 0, nframes * sizeof(jack_default_audio_sample_t));
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return nframes;
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}
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// (3)
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if (ltc_speed == 0 && new_ltc_speed != 0) {
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DEBUG_TRACE (DEBUG::LTC, "LTC TX2: transport started rolling - reset\n");
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ltc_tx_reset();
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}
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/* the timecode duration corresponding to the samples still in the buffer
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* here we use prev. speed to match the begining of this cycle for aligment.
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*/
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double poff = (ltc_buf_len - ltc_buf_off) * ltc_speed;
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if (speed_changed && new_ltc_speed != 0) {
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/* we need to re-sample the existing buffer.
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* "make space for the en-coder to catch up to the new speed"
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*
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* since the LTC signal is a rect waveform we can simply squeeze it
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* by removing samples or duplicating /here and there/.
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*
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* There may be a more elegant way to do this, in fact one could
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* simply re-render the buffer using ltc_encoder_encode_byte()
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* but that'd require some timecode offset buffer magic,
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* which is left for later..
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*/
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double oldbuflen = double(ltc_buf_len - ltc_buf_off);
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double newbuflen = double(ltc_buf_len - ltc_buf_off) * fabs(ltc_speed / new_ltc_speed);
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DEBUG_TRACE (DEBUG::LTC, string_compose("LTC TX2: bufOld %1 bufNew %2 | diff %3\n",
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(ltc_buf_len - ltc_buf_off), newbuflen, newbuflen - oldbuflen
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));
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double bufrspdiff = rint(newbuflen - oldbuflen);
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if (abs(bufrspdiff) > newbuflen || abs(bufrspdiff) > oldbuflen) {
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DEBUG_TRACE (DEBUG::LTC, "LTC TX2: resampling buffer would destroy information.\n");
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ltc_tx_reset();
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poff = 0;
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} else if (bufrspdiff != 0 && newbuflen > oldbuflen) {
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int incnt = 0;
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double samples_to_insert = ceil(newbuflen - oldbuflen);
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double avg_distance = newbuflen / samples_to_insert;
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DEBUG_TRACE (DEBUG::LTC, string_compose("LTC TX2: resample buffer insert: %1\n", samples_to_insert));
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for (int rp = ltc_buf_off; rp < ltc_buf_len - 1; ++rp) {
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const int ro = rp - ltc_buf_off;
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if (ro < (incnt*avg_distance)) continue;
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const ltcsnd_sample_t v1 = ltc_enc_buf[rp];
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const ltcsnd_sample_t v2 = ltc_enc_buf[rp+1];
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if (v1 != v2 && ro < ((incnt+1)*avg_distance)) continue;
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memmove(<c_enc_buf[rp+1], <c_enc_buf[rp], ltc_buf_len-rp);
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incnt++;
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ltc_buf_len++;
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}
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} else if (bufrspdiff != 0 && newbuflen < oldbuflen) {
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double samples_to_remove = ceil(oldbuflen - newbuflen);
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DEBUG_TRACE (DEBUG::LTC, string_compose("LTC TX2: resample buffer - remove: %1\n", samples_to_remove));
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if (oldbuflen <= samples_to_remove) {
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ltc_buf_off = ltc_buf_len= 0;
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} else {
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double avg_distance = newbuflen / samples_to_remove;
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int rmcnt = 0;
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for (int rp = ltc_buf_off; rp < ltc_buf_len - 1; ++rp) {
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const int ro = rp - ltc_buf_off;
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if (ro < (rmcnt*avg_distance)) continue;
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const ltcsnd_sample_t v1 = ltc_enc_buf[rp];
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const ltcsnd_sample_t v2 = ltc_enc_buf[rp+1];
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if (v1 != v2 && ro < ((rmcnt+1)*avg_distance)) continue;
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memmove(<c_enc_buf[rp], <c_enc_buf[rp+1], ltc_buf_len-rp-1);
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ltc_buf_len--;
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rmcnt++;
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}
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}
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}
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}
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ltc_speed = new_ltc_speed;
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DEBUG_TRACE (DEBUG::LTC, string_compose("LTC TX2: transport speed %1.\n", ltc_speed));
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// (3) bit/sample aligment
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Timecode::Time tc_start;
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framepos_t tc_sample_start;
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/* calc timecode frame from current position - round down to nearest timecode */
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int boff;
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if (ltc_speed == 0) {
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boff = 0;
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} else if (ltc_speed < 0) {
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boff = (ltc_enc_byte - 9) * frames_per_timecode_frame() / 10;
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} else {
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boff = ltc_enc_byte * frames_per_timecode_frame() / 10;
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}
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sample_to_timecode(cycle_start_frame
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- boff
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- ltc_speed * (ltc_buf_len - ltc_buf_off),
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tc_start, true, false);
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sample_to_timecode(cycle_start_frame, tc_start, true, false);
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/* convert timecode back to sample-position */
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Timecode::timecode_to_sample (tc_start, tc_sample_start, true, false,
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@ -208,29 +316,46 @@ Session::ltc_tx_send_time_code_for_cycle (framepos_t start_frame, framepos_t end
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/* difference between current frame and TC frame in samples */
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frameoffset_t soff = cycle_start_frame - tc_sample_start;
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DEBUG_TRACE (DEBUG::LTC, string_compose("LTC TX3: now: %1 tra: %2 eoff %3\n", cycle_start_frame, tc_sample_start, soff));
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DEBUG_TRACE (DEBUG::LTC, string_compose("LTC TX3: A3cycle: %1 = A3tc: %2 +off: %3\n",
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cycle_start_frame, tc_sample_start, soff));
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// (4)
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DEBUG_TRACE (DEBUG::LTC, string_compose("LTC TX4: enc: %1 boff: %2 || enc-byte:%3\n", ltc_enc_pos, boff, ltc_enc_byte));
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if (ltc_enc_pos != tc_sample_start) {
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/* re-calc timecode w/o buffer offset */
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sample_to_timecode(cycle_start_frame, tc_start, true, false);
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Timecode::timecode_to_sample (tc_start, tc_sample_start, true, false,
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double(frame_rate()),
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config.get_subframes_per_frame(),
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config.get_timecode_offset_negative(), config.get_timecode_offset()
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);
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soff = cycle_start_frame - tc_sample_start;
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DEBUG_TRACE (DEBUG::LTC, string_compose("LTC TX4: now: %1 trs: %2 toff %3\n", cycle_start_frame, tc_sample_start, soff));
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// (4) check if aligment matches
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const double fptcf = frames_per_timecode_frame(); // convenient, used a lot below.
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double maxdiff;
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/* due to rounding error and variations in LTC-bit duration depending
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* on the speed, we can be off by +- speed samples.
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* during speed-changes we can acually ready += 2*speed audio-samples
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* in the cycle after the speed change. The average delta however is 0.
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*/
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if (config.get_external_sync()) {
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maxdiff = fptcf; // TODO get slave max delta
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} else {
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maxdiff = ceil(fabs(ltc_speed))*2.0;
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}
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DEBUG_TRACE (DEBUG::LTC, string_compose("LTC TX4: enc: %1 + %2 - %3 || buf-bytes: %4 enc-byte: %5\n",
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ltc_enc_pos, ltc_enc_cnt, poff, (ltc_buf_len - ltc_buf_off), poff, ltc_enc_byte));
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DEBUG_TRACE (DEBUG::LTC, string_compose("LTC TX4: enc-pos: %1 | d: %2\n",
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ltc_enc_pos + ltc_enc_cnt - poff,
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rint(ltc_enc_pos + ltc_enc_cnt - poff) - cycle_start_frame
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));
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if (fabs(ceil(ltc_enc_pos + ltc_enc_cnt - poff) - cycle_start_frame) > maxdiff)
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{
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// (5) re-align
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ltc_tx_reset();
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/* set frame to encode */
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SMPTETimecode tc;
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tc.hours = tc_start.hours;
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tc.mins = tc_start.minutes;
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tc.secs = tc_start.seconds;
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tc.frame = tc_start.frames;
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ltc_encoder_set_timecode(ltc_encoder, &tc);
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#if 1
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/* workaround for libltc recognizing 29.97 and 30000/1001 as drop-frame TC.
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* in A3 only 30000/1001 is drop-frame and there are also other questionable
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* DF timecodes such as 24k/1001 and 25k/1001.
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@ -239,102 +364,89 @@ Session::ltc_tx_send_time_code_for_cycle (framepos_t start_frame, framepos_t end
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ltc_encoder_get_frame(ltc_encoder, <cframe);
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ltcframe.dfbit = timecode_has_drop_frames(cur_timecode)?1:0;
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ltc_encoder_set_frame(ltc_encoder, <cframe);
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#endif
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// (5)
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int fdiff = 0;
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if (soff < 0) {
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fdiff = ceil(-soff / frames_per_timecode_frame());
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soff += fdiff * frames_per_timecode_frame();
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for (int i=0; i < fdiff; ++i) {
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DEBUG_TRACE (DEBUG::LTC, string_compose("LTC TX4: now: %1 trs: %2 toff %3\n", cycle_start_frame, tc_sample_start, soff));
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uint32_t cyc_off;
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assert(soff >= 0 && soff < fptcf);
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if (ltc_speed < 0 ) {
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/* calculate the byte that starts at or after the current position */
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ltc_enc_byte = floor((10.0 * soff) / (fptcf));
|
||||
ltc_enc_cnt = double(ltc_enc_byte * fptcf / 10.0);
|
||||
|
||||
/* calculate difference between the current position and the byte to send */
|
||||
cyc_off = soff- ceil(ltc_enc_cnt);
|
||||
|
||||
} else {
|
||||
/* calculate the byte that starts at or after the current position */
|
||||
ltc_enc_byte = ceil((10.0 * soff) / fptcf);
|
||||
ltc_enc_cnt = double(ltc_enc_byte * fptcf / 10.0);
|
||||
|
||||
/* calculate difference between the current position and the byte to send */
|
||||
cyc_off = ceil(ltc_enc_cnt) - soff;
|
||||
|
||||
if (ltc_enc_byte == 10) {
|
||||
ltc_enc_byte = 0;
|
||||
ltc_encoder_inc_timecode(ltc_encoder);
|
||||
}
|
||||
}
|
||||
else if (soff >= frames_per_timecode_frame()) {
|
||||
fdiff = floor(soff / frames_per_timecode_frame());
|
||||
soff -= fdiff * frames_per_timecode_frame();
|
||||
for (int i=0; i < fdiff; ++i) {
|
||||
ltc_encoder_dec_timecode(ltc_encoder);
|
||||
}
|
||||
}
|
||||
|
||||
assert(soff >= 0 && soff < frames_per_timecode_frame());
|
||||
|
||||
DEBUG_TRACE (DEBUG::LTC, string_compose("LTC TX5 restart encoder fdiff %1 sdiff %2\n", fdiff, soff));
|
||||
ltc_tx_reset();
|
||||
DEBUG_TRACE (DEBUG::LTC, string_compose("LTC TX5 restart encoder: soff %1 byte %2 cycoff %3\n",
|
||||
soff, ltc_enc_byte, cyc_off));
|
||||
|
||||
if (ltc_speed == 0) {
|
||||
// offset is irrelevant when not rolling
|
||||
soff = 0;
|
||||
}
|
||||
if (soff > 0 && soff <= nframes) {
|
||||
txf=soff;
|
||||
memset(out, 0, soff * sizeof(jack_default_audio_sample_t));
|
||||
} else if (soff > 0) {
|
||||
/* don't bother to align non-moving loops */
|
||||
} else if (cyc_off > 0 && cyc_off <= nframes) {
|
||||
/* offset in this cycle */
|
||||
txf= rint(cyc_off / fabs(ltc_speed));
|
||||
memset(out, 0, cyc_off * sizeof(jack_default_audio_sample_t));
|
||||
} else if (cyc_off > 0) {
|
||||
/* resync next cycle */
|
||||
memset(out, 0, soff * sizeof(jack_default_audio_sample_t));
|
||||
memset(out, 0, cyc_off * sizeof(jack_default_audio_sample_t));
|
||||
return nframes;
|
||||
}
|
||||
|
||||
ltc_enc_byte = soff * 10 / frames_per_timecode_frame();
|
||||
|
||||
if (ltc_speed < 0 ) {
|
||||
ltc_enc_byte = 9 - ltc_enc_byte;
|
||||
}
|
||||
|
||||
ltc_enc_pos = tc_sample_start;
|
||||
DEBUG_TRACE (DEBUG::LTC, string_compose("LTC TX5 restart @ %1 byte %2\n", ltc_enc_pos, ltc_enc_byte));
|
||||
|
||||
DEBUG_TRACE (DEBUG::LTC, string_compose("LTC TX5 restart @ %1 + %2 - %3 | byte %4\n",
|
||||
ltc_enc_pos, ltc_enc_cnt, cyc_off, ltc_enc_byte));
|
||||
}
|
||||
|
||||
// (6)
|
||||
|
||||
// (6) encode and output
|
||||
while (1) {
|
||||
#ifdef LTC_GEN_FRAMEDBUG
|
||||
#ifdef LTC_GEN_TXDBUG
|
||||
DEBUG_TRACE (DEBUG::LTC, string_compose("LTC TX6.1 @%1 [ %2 / %3 ]\n", txf, ltc_buf_off, ltc_buf_len));
|
||||
#endif
|
||||
// (6a)
|
||||
// (6a) send remaining buffer
|
||||
while ((ltc_buf_off < ltc_buf_len) && (txf < nframes)) {
|
||||
const float v1 = ltc_enc_buf[ltc_buf_off++] - 128.0;
|
||||
const jack_default_audio_sample_t val = (jack_default_audio_sample_t) (v1*ltcvol);
|
||||
out[txf++] = val;
|
||||
}
|
||||
#ifdef LTC_GEN_FRAMEDBUG
|
||||
#ifdef LTC_GEN_TXDBUG
|
||||
DEBUG_TRACE (DEBUG::LTC, string_compose("LTC TX6.2 @%1 [ %2 / %3 ]\n", txf, ltc_buf_off, ltc_buf_len));
|
||||
#endif
|
||||
|
||||
if (txf >= nframes) {
|
||||
DEBUG_TRACE (DEBUG::LTC, string_compose("LTC TX7 txf = %1 nframes = %2\n", txf, nframes));
|
||||
DEBUG_TRACE (DEBUG::LTC, string_compose("LTC TX7 enc: %1 [ %2 / %3 ] byte: %4 spd %5 fpp %6 || nf: %7\n",
|
||||
ltc_enc_pos, ltc_buf_off, ltc_buf_len, ltc_enc_byte, ltc_speed, nframes, txf));
|
||||
return nframes;
|
||||
}
|
||||
|
||||
ltc_buf_len = 0;
|
||||
ltc_buf_off = 0;
|
||||
|
||||
// (6b)
|
||||
// (6b) encode LTC, bump timecode
|
||||
|
||||
if (SIGNUM(ltc_speed) == -1) {
|
||||
if (ltc_speed < 0) {
|
||||
ltc_enc_byte = (ltc_enc_byte + 9)%10;
|
||||
if (ltc_enc_byte == 9) {
|
||||
ltc_encoder_dec_timecode(ltc_encoder);
|
||||
#if 0 // this does not work for fractional or drop-frame TC
|
||||
ltc_enc_pos -= frames_per_timecode_frame();
|
||||
#else // TODO make this a function
|
||||
SMPTETimecode enctc;
|
||||
Timecode::Time a3tc;
|
||||
ltc_encoder_get_timecode(ltc_encoder, &enctc);
|
||||
|
||||
a3tc.hours = enctc.hours ;
|
||||
a3tc.minutes = enctc.mins ;
|
||||
a3tc.seconds = enctc.secs ;
|
||||
a3tc.frames = enctc.frame ;
|
||||
a3tc.rate = timecode_to_frames_per_second(cur_timecode);
|
||||
a3tc.drop = timecode_has_drop_frames(cur_timecode);
|
||||
|
||||
Timecode::timecode_to_sample (a3tc, ltc_enc_pos, true, false,
|
||||
double(frame_rate()),
|
||||
config.get_subframes_per_frame(),
|
||||
config.get_timecode_offset_negative(), config.get_timecode_offset()
|
||||
);
|
||||
#endif
|
||||
ltc_tx_recalculate_position();
|
||||
ltc_enc_cnt = fptcf;
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -347,7 +459,7 @@ Session::ltc_tx_send_time_code_for_cycle (framepos_t start_frame, framepos_t end
|
|||
}
|
||||
int enc_frames = ltc_encoder_get_buffer(ltc_encoder, &(ltc_enc_buf[ltc_buf_len]));
|
||||
#ifdef LTC_GEN_FRAMEDBUG
|
||||
DEBUG_TRACE (DEBUG::LTC, string_compose("LTC TX6.3 encoded %1 bytes LTC-byte %2 at spd %3\n", enc_frames, ltc_enc_byte, ltc_speed));
|
||||
DEBUG_TRACE (DEBUG::LTC, string_compose("LTC TX6.3 encoded %1 bytes for LTC-byte %2 at spd %3\n", enc_frames, ltc_enc_byte, ltc_speed));
|
||||
#endif
|
||||
if (enc_frames <=0) {
|
||||
DEBUG_TRACE (DEBUG::LTC, "LTC TX6.3 encoder empty buffer.\n");
|
||||
|
|
@ -358,35 +470,23 @@ Session::ltc_tx_send_time_code_for_cycle (framepos_t start_frame, framepos_t end
|
|||
}
|
||||
|
||||
ltc_buf_len += enc_frames;
|
||||
if (ltc_speed < 0)
|
||||
ltc_enc_cnt -= fptcf/10.0; //enc_frames * ltc_speed;
|
||||
else
|
||||
ltc_enc_cnt += fptcf/10.0; //enc_frames * ltc_speed;
|
||||
|
||||
if (SIGNUM(ltc_speed) == 1) {
|
||||
if (ltc_speed >= 0) {
|
||||
ltc_enc_byte = (ltc_enc_byte + 1)%10;
|
||||
if (ltc_enc_byte == 0 && ltc_speed != 0) {
|
||||
ltc_encoder_inc_timecode(ltc_encoder);
|
||||
#if 0 // this does not work for fractional or drop-frame TC
|
||||
ltc_enc_pos += frames_per_timecode_frame();
|
||||
#else // TODO make this a function
|
||||
SMPTETimecode enctc;
|
||||
Timecode::Time a3tc;
|
||||
ltc_encoder_get_timecode(ltc_encoder, &enctc);
|
||||
|
||||
a3tc.hours = enctc.hours ;
|
||||
a3tc.minutes = enctc.mins ;
|
||||
a3tc.seconds = enctc.secs ;
|
||||
a3tc.frames = enctc.frame ;
|
||||
a3tc.rate = timecode_to_frames_per_second(cur_timecode);
|
||||
a3tc.drop = timecode_has_drop_frames(cur_timecode);
|
||||
|
||||
Timecode::timecode_to_sample (a3tc, ltc_enc_pos, true, false,
|
||||
double(frame_rate()),
|
||||
config.get_subframes_per_frame(),
|
||||
config.get_timecode_offset_negative(), config.get_timecode_offset()
|
||||
);
|
||||
#endif
|
||||
ltc_tx_recalculate_position();
|
||||
ltc_enc_cnt = 0;
|
||||
} else if (ltc_enc_byte == 0) {
|
||||
ltc_enc_cnt = 0;
|
||||
}
|
||||
}
|
||||
#ifdef LTC_GEN_FRAMEDBUG
|
||||
DEBUG_TRACE (DEBUG::LTC, string_compose("LTC TX6.4 fno: %1 [ %2 / %3 ] spd %4\n", ltc_enc_pos, ltc_buf_off, ltc_buf_len, ltc_speed));
|
||||
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
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user