*/
#include <iostream>
#include <errno.h>
-#include <poll.h>
#include <sys/types.h>
#include <unistd.h>
#include "pbd/error.h"
+#include "pbd/failed_constructor.h"
+#include "pbd/pthread_utils.h"
#include "ardour/debug.h"
-#include "ardour/slave.h"
+#include "ardour/profile.h"
+#include "ardour/transport_master.h"
#include "ardour/session.h"
#include "ardour/audioengine.h"
#include "ardour/audio_port.h"
-#include "i18n.h"
+#include "pbd/i18n.h"
using namespace std;
using namespace ARDOUR;
using namespace PBD;
using namespace Timecode;
-LTC_Slave::LTC_Slave (Session& s)
- : session (s)
+#define ENGINE AudioEngine::instance()
+#define FLYWHEEL_TIMEOUT ( 1 * ENGINE->sample_rate() )
+
+/* XXX USE Config->get_ltc_input */
+
+LTC_TransportMaster::LTC_TransportMaster (std::string const & name)
+ : TimecodeTransportMaster (name, LTC)
+ , did_reset_tc_format (false)
+ , decoder (0)
+ , samples_per_ltc_frame (0)
+ , fps_detected (false)
+ , monotonic_cnt (0)
+ , last_timestamp (0)
+ , last_ltc_sample (0)
+ , delayedlocked (10)
+ , ltc_detect_fps_cnt (0)
+ , ltc_detect_fps_max (0)
+ , sync_lock_broken (false)
{
- frames_per_ltc_frame = 1920.0; // samplerate / framerate
- ltc_transport_pos = 0;
- ltc_speed = 1.0;
- last_timestamp = 0;
+ if ((_port = AudioEngine::instance()->register_input_port (DataType::AUDIO, string_compose ("%1 in", _name))) == 0) {
+ throw failed_constructor();
+ }
+
+ DEBUG_TRACE (DEBUG::Slave, string_compose ("LTC registered %1\n", _port->name()));
+
+ memset(&prev_sample, 0, sizeof(LTCFrameExt));
- decoder = ltc_decoder_create((int) frames_per_ltc_frame, 128 /*queue size*/);
+ resync_latency();
+
+ AudioEngine::instance()->Xrun.connect_same_thread (port_connections, boost::bind (<C_TransportMaster::resync_xrun, this));
+ AudioEngine::instance()->GraphReordered.connect_same_thread (port_connections, boost::bind (<C_TransportMaster::resync_latency, this));
}
-LTC_Slave::~LTC_Slave()
+void
+LTC_TransportMaster::init ()
+{
+ reset (true);
+}
+
+void
+LTC_TransportMaster::set_session (Session *s)
{
+ config_connection.disconnect ();
+ _session = s;
+
+ if (_session) {
+
+ samples_per_ltc_frame = _session->samples_per_timecode_frame();
+ timecode.rate = _session->timecode_frames_per_second();
+ timecode.drop = _session->timecode_drop_frames();
+ printed_timecode_warning = false;
+ ltc_timecode = _session->config.get_timecode_format();
+ a3e_timecode = _session->config.get_timecode_format();
+
+ if (Config->get_use_session_timecode_format() && _session) {
+ samples_per_timecode_frame = _session->samples_per_timecode_frame();
+ }
+
+ if (decoder) {
+ ltc_decoder_free (decoder);
+ }
+
+ decoder = ltc_decoder_create((int) samples_per_ltc_frame, 128 /*queue size*/);
+
+ parse_timecode_offset();
+ reset();
+
+ _session->config.ParameterChanged.connect_same_thread (config_connection, boost::bind (<C_TransportMaster::parameter_changed, this, _1));
+ }
+}
+
+LTC_TransportMaster::~LTC_TransportMaster()
+{
+ port_connections.drop_connections();
+ config_connection.disconnect();
+
if (did_reset_tc_format) {
- session.config.set_timecode_format (saved_tc_format);
+ _session->config.set_timecode_format (saved_tc_format);
}
ltc_decoder_free(decoder);
}
-bool
-LTC_Slave::give_slave_full_control_over_transport_speed() const
-{
- return true; // DLL align to engine transport
- // return false; // for Session-level computed varispeed
+void
+LTC_TransportMaster::parse_timecode_offset() {
+ Timecode::Time offset_tc;
+ Timecode::parse_timecode_format(_session->config.get_slave_timecode_offset(), offset_tc);
+ offset_tc.rate = _session->timecode_frames_per_second();
+ offset_tc.drop = _session->timecode_drop_frames();
+ _session->timecode_to_sample(offset_tc, timecode_offset, false, false);
+ timecode_negative_offset = offset_tc.negative;
}
-ARDOUR::framecnt_t
-LTC_Slave::resolution () const
+void
+LTC_TransportMaster::parameter_changed (std::string const & p)
{
- return (framecnt_t) (frames_per_ltc_frame);
+ if (p == "slave-timecode-offset"
+ || p == "timecode-format"
+ ) {
+ parse_timecode_offset();
+ }
}
-ARDOUR::framecnt_t
-LTC_Slave::seekahead_distance () const
+ARDOUR::samplecnt_t
+LTC_TransportMaster::resolution () const
{
- return (framecnt_t) (frames_per_ltc_frame * 2);
+ return (samplecnt_t) (ENGINE->sample_rate() / 1000);
}
bool
-LTC_Slave::locked () const
+LTC_TransportMaster::locked () const
{
- return true;
+ return (delayedlocked < 5);
}
bool
-LTC_Slave::ok() const
+LTC_TransportMaster::ok() const
{
return true;
}
-int
-LTC_Slave::parse_ltc(const jack_nframes_t nframes, const jack_default_audio_sample_t * const in, const framecnt_t posinfo)
+void
+LTC_TransportMaster::resync_xrun()
+{
+ DEBUG_TRACE (DEBUG::LTC, "LTC resync_xrun()\n");
+ sync_lock_broken = false;
+}
+
+void
+LTC_TransportMaster::resync_latency()
+{
+ DEBUG_TRACE (DEBUG::LTC, "LTC resync_latency()\n");
+ sync_lock_broken = false;
+
+ if (!_port) {
+ _port->get_connected_latency_range (ltc_slave_latency, false);
+ }
+}
+
+void
+LTC_TransportMaster::reset (bool with_ts)
+{
+ DEBUG_TRACE (DEBUG::LTC, "LTC reset()\n");
+ if (with_ts) {
+ last_timestamp = 0;
+ _current_delta = 0;
+ }
+ transport_direction = 0;
+ ltc_speed = 0;
+ sync_lock_broken = false;
+ monotonic_cnt = 0;
+}
+
+void
+LTC_TransportMaster::parse_ltc (const ARDOUR::pframes_t nframes, const Sample* const in, const ARDOUR::samplecnt_t posinfo)
{
- jack_nframes_t i;
+ pframes_t i;
unsigned char sound[8192];
- if (nframes > 8192) return 1;
+
+ if (nframes > 8192) {
+ /* TODO warn once or wrap, loop conversion below
+ * does jack/A3 support > 8192 spp anyway?
+ */
+ return;
+ }
for (i = 0; i < nframes; i++) {
- const int snd=(int)rint((127.0*in[i])+128.0);
+ const int snd=(int) rint ((127.0*in[i])+128.0);
sound[i] = (unsigned char) (snd&0xff);
}
- ltc_decoder_write(decoder, sound, nframes, posinfo);
- return 0;
+
+ ltc_decoder_write (decoder, sound, nframes, posinfo);
+
+ return;
}
bool
-LTC_Slave::process_ltc(framepos_t now, framecnt_t nframes)
+LTC_TransportMaster::equal_ltc_sample_time(LTCFrame *a, LTCFrame *b) {
+ if (a->frame_units != b->frame_units ||
+ a->frame_tens != b->frame_tens ||
+ a->dfbit != b->dfbit ||
+ a->secs_units != b->secs_units ||
+ a->secs_tens != b->secs_tens ||
+ a->mins_units != b->mins_units ||
+ a->mins_tens != b->mins_tens ||
+ a->hours_units != b->hours_units ||
+ a->hours_tens != b->hours_tens) {
+ return false;
+ }
+ return true;
+}
+
+bool
+LTC_TransportMaster::detect_discontinuity(LTCFrameExt *sample, int fps, bool fuzzy) {
+ bool discontinuity_detected = false;
+
+ if (fuzzy && (
+ ( sample->reverse && prev_sample.ltc.frame_units == 0)
+ ||(!sample->reverse && sample->ltc.frame_units == 0)
+ )) {
+ memcpy(&prev_sample, sample, sizeof(LTCFrameExt));
+ return false;
+ }
+
+ if (sample->reverse) {
+ ltc_frame_decrement(&prev_sample.ltc, fps, LTC_TV_525_60, 0);
+ } else {
+ ltc_frame_increment(&prev_sample.ltc, fps, LTC_TV_525_60, 0);
+ }
+ if (!equal_ltc_sample_time(&prev_sample.ltc, &sample->ltc)) {
+ discontinuity_detected = true;
+ }
+
+ memcpy(&prev_sample, sample, sizeof(LTCFrameExt));
+ return discontinuity_detected;
+}
+
+bool
+LTC_TransportMaster::detect_ltc_fps(int frameno, bool df)
{
- Time timecode;
- bool have_frame = false;
+ bool fps_changed = false;
+ double detected_fps = 0;
+ if (frameno > ltc_detect_fps_max)
+ {
+ ltc_detect_fps_max = frameno;
+ }
+ ltc_detect_fps_cnt++;
+
+ if (ltc_detect_fps_cnt > 40) {
+ if (ltc_detect_fps_cnt > ltc_detect_fps_max) {
+ detected_fps = ltc_detect_fps_max + 1;
+ if (df) {
+ /* LTC df -> indicates fractional framerate */
+ if (fr2997()) {
+ detected_fps = detected_fps * 999.0 / 1000.0;
+ } else {
+ detected_fps = detected_fps * 1000.0 / 1001.0;
+ }
+ }
+
+ if (timecode.rate != detected_fps || timecode.drop != df) {
+ DEBUG_TRACE (DEBUG::LTC, string_compose ("LTC detected FPS: %1%2\n", detected_fps, df?"df":"ndf"));
+ } else {
+ detected_fps = 0; /* no cange */
+ }
+ }
+ ltc_detect_fps_cnt = ltc_detect_fps_max = 0;
+ }
+
+ /* when changed */
+ if (detected_fps != 0 && (detected_fps != timecode.rate || df != timecode.drop)) {
+ timecode.rate = detected_fps;
+ timecode.drop = df;
+ samples_per_ltc_frame = double(_session->sample_rate()) / timecode.rate;
+ DEBUG_TRACE (DEBUG::LTC, string_compose ("LTC reset to FPS: %1%2 ; audio-samples per LTC: %3\n",
+ detected_fps, df?"df":"ndf", samples_per_ltc_frame));
+ fps_changed=true;
+ }
+
+ /* poll and check session TC */
+ TimecodeFormat tc_format = apparent_timecode_format();
+ TimecodeFormat cur_timecode = _session->config.get_timecode_format();
- framepos_t sess_pos = session.transport_frame(); // corresponds to now
- //sess_pos -= session.engine().frames_since_cycle_start();
+ if (Config->get_timecode_sync_frame_rate()) {
+ /* enforce time-code */
+ if (!did_reset_tc_format) {
+ saved_tc_format = cur_timecode;
+ did_reset_tc_format = true;
+ }
+ if (cur_timecode != tc_format) {
+ if (ceil(Timecode::timecode_to_frames_per_second(cur_timecode)) != ceil(Timecode::timecode_to_frames_per_second(tc_format))) {
+ warning << string_compose(_("Session framerate adjusted from %1 to LTC's %2."),
+ Timecode::timecode_format_name(cur_timecode),
+ Timecode::timecode_format_name(tc_format))
+ << endmsg;
+ }
+ _session->config.set_timecode_format (tc_format);
+ }
+ } else {
+ /* only warn about TC mismatch */
+ if (ltc_timecode != tc_format) printed_timecode_warning = false;
+ if (a3e_timecode != cur_timecode) printed_timecode_warning = false;
+
+ if (cur_timecode != tc_format && ! printed_timecode_warning) {
+ if (ceil(Timecode::timecode_to_frames_per_second(cur_timecode)) != ceil(Timecode::timecode_to_frames_per_second(tc_format))) {
+ warning << string_compose(_("Session and LTC framerate mismatch: LTC:%1 Session:%2."),
+ Timecode::timecode_format_name(tc_format),
+ Timecode::timecode_format_name(cur_timecode))
+ << endmsg;
+ }
+ printed_timecode_warning = true;
+ }
+ }
+ ltc_timecode = tc_format;
+ a3e_timecode = cur_timecode;
+
+ if (Config->get_use_session_timecode_format() && _session) {
+ samples_per_timecode_frame = _session->samples_per_timecode_frame();
+ } else {
+ samples_per_timecode_frame = ENGINE->sample_rate() / Timecode::timecode_to_frames_per_second (ltc_timecode);
+ }
+
+ return fps_changed;
+}
+
+void
+LTC_TransportMaster::process_ltc(samplepos_t const now)
+{
+ LTCFrameExt sample;
+ LTC_TV_STANDARD tv_standard = LTC_TV_625_50;
- DEBUG_TRACE (DEBUG::LTC, string_compose ("LTC Process eng-tme: %1 eng-pos: %2\n", now, sess_pos));
+ while (ltc_decoder_read (decoder, &sample)) {
- LTCFrameExt frame;
- while (ltc_decoder_read(decoder,&frame)) {
SMPTETimecode stime;
- ltc_frame_to_time(&stime, &frame.ltc, 0);
-#if 1
- fprintf(stdout, "LTC %02d:%02d:%02d%c%02d | %8lld %8lld%s\n",
- stime.hours,
- stime.mins,
- stime.secs,
- (frame.ltc.dfbit) ? '.' : ':',
- stime.frame,
- frame.off_start,
- frame.off_end,
- frame.reverse ? " R" : " "
- );
-#endif
+ ltc_frame_to_time (&stime, &sample.ltc, 0);
timecode.negative = false;
timecode.subframes = 0;
- timecode.drop = (frame.ltc.dfbit)? true : false;
- timecode.rate = 25.0; // XXX
- /* when a full LTC frame is decoded, the timecode the LTC frame
+ /* set timecode.rate and timecode.drop: */
+
+ const bool ltc_is_stationary = equal_ltc_sample_time (&prev_sample.ltc, &sample.ltc);
+
+ if (detect_discontinuity (&sample, ceil(timecode.rate), !fps_detected)) {
+
+ if (fps_detected) {
+ ltc_detect_fps_cnt = ltc_detect_fps_max = 0;
+ }
+
+ fps_detected = false;
+ }
+
+ if (!ltc_is_stationary && detect_ltc_fps (stime.frame, (sample.ltc.dfbit)? true : false)) {
+ reset();
+ fps_detected=true;
+ }
+
+#ifndef NDEBUG
+ if (DEBUG_ENABLED (DEBUG::LTC)) {
+ /* use fprintf for simpler correct formatting of times
+ */
+ fprintf (stderr, "LTC@%ld %02d:%02d:%02d%c%02d | %8lld %8lld%s\n",
+ now,
+ stime.hours,
+ stime.mins,
+ stime.secs,
+ (sample.ltc.dfbit) ? '.' : ':',
+ stime.frame,
+ sample.off_start,
+ sample.off_end,
+ sample.reverse ? " R" : " "
+ );
+ }
+#endif
+
+ /* when a full LTC sample is decoded, the timecode the LTC sample
* is referring has just passed.
* So we send the _next_ timecode which
- * is expected to start at the end of the current frame
+ * is expected to start at the end of the current sample
*/
int fps_i = ceil(timecode.rate);
- if (!frame.reverse) {
- ltc_frame_increment(&frame.ltc, fps_i , 0);
- ltc_frame_to_time(&stime, &frame.ltc, 0);
+
+ switch(fps_i) {
+ case 30:
+ if (timecode.drop) {
+ tv_standard = LTC_TV_525_60;
+ } else {
+ tv_standard = LTC_TV_1125_60;
+ }
+ break;
+ case 25:
+ tv_standard = LTC_TV_625_50;
+ break;
+ default:
+ tv_standard = LTC_TV_FILM_24; /* == LTC_TV_1125_60 == no offset, 24,30fps BGF */
+ break;
+ }
+
+ if (!sample.reverse) {
+ ltc_frame_increment(&sample.ltc, fps_i, tv_standard, 0);
+ ltc_frame_to_time(&stime, &sample.ltc, 0);
+ transport_direction = 1;
+ sample.off_start -= ltc_frame_alignment(samples_per_timecode_frame, tv_standard);
+ sample.off_end -= ltc_frame_alignment(samples_per_timecode_frame, tv_standard);
} else {
- ltc_frame_decrement(&frame.ltc, fps_i , 0);
- int off = frame.off_end - frame.off_start;
- frame.off_start += off;
- frame.off_end += off;
+ ltc_frame_decrement(&sample.ltc, fps_i, tv_standard, 0);
+ int off = sample.off_end - sample.off_start;
+ sample.off_start += off - ltc_frame_alignment(samples_per_timecode_frame, tv_standard);
+ sample.off_end += off - ltc_frame_alignment(samples_per_timecode_frame, tv_standard);
+ transport_direction = -1;
}
timecode.hours = stime.hours;
timecode.seconds = stime.secs;
timecode.frames = stime.frame;
- framepos_t ltc_frame;
- session.timecode_to_sample (timecode, ltc_frame, true, false);
+ samplepos_t ltc_sample; // audio-sample corresponding to position of LTC frame
- double poff = (frame.off_end - now);
+ if (_session && Config->get_use_session_timecode_format()) {
+ Timecode::timecode_to_sample (timecode, ltc_sample, true, false, (double)ENGINE->sample_rate(), _session->config.get_subframes_per_frame(), timecode_negative_offset, timecode_offset);
+ } else {
+ Timecode::timecode_to_sample (timecode, ltc_sample, true, false, (double)ENGINE->sample_rate(), 100, timecode_negative_offset, timecode_offset);
+ }
+
+ ltc_sample += ltc_slave_latency.max;
+
+ /* This LTC frame spans sample time between sample.off_start .. sample.off_end
+ *
+ * NOTE: these sample times are NOT the ones that LTC is representing. They are
+ * derived our own audioengine's monotonic audio clock.
+ *
+ * So we expect the next frame to span sample.off_end+1 and ... <don't care for now>.
+ * That isn't the time we will necessarily receive the LTC frame, but the decoder
+ * should tell us that its span begins there.
+ *
+ */
- ltc_transport_pos = ltc_frame - poff;
- frames_per_ltc_frame = (double(session.frame_rate()) / timecode.rate);
- //frames_per_ltc_frame = frame.off_end - frame.off_start; // the first one is off.
+ samplepos_t cur_timestamp = sample.off_end + 1;
- DEBUG_TRACE (DEBUG::LTC, string_compose ("LTC frame: %1 poff: %2 pos :%3\n", ltc_frame, poff, ltc_transport_pos));
+ DEBUG_TRACE (DEBUG::LTC, string_compose ("LTC S: %1 LS: %2 N: %3 L: %4\n", ltc_sample, last_ltc_sample, cur_timestamp, last_timestamp));
- if (last_timestamp == 0 || ((now - last_timestamp) > 4 * frames_per_ltc_frame) ) {
- init_ltc_dll(ltc_frame, frames_per_ltc_frame);
- ltc_speed = 1.0; // XXX
+ if (cur_timestamp <= last_timestamp || last_timestamp == 0) {
+ DEBUG_TRACE (DEBUG::LTC, string_compose ("LTC speed: UNCHANGED: %1\n", ltc_speed));
} else {
+ ltc_speed = double (ltc_sample - last_ltc_sample) / double (cur_timestamp - last_timestamp);
+ DEBUG_TRACE (DEBUG::LTC, string_compose ("LTC speed: %1\n", ltc_speed));
+ }
- double e = (double(ltc_frame) - poff - double(sess_pos));
- // update DLL
- t0 = t1;
- t1 += b * e + e2;
- e2 += c * e;
+ if (fabs (ltc_speed) > 10.0) {
+ ltc_speed = 0;
+ }
- ltc_speed = (t1 - t0) / frames_per_ltc_frame;
- DEBUG_TRACE (DEBUG::LTC, string_compose ("LTC DLL t0:%1 t1:%2 err:%3 spd:%4 ddt:%5\n", t0, t1, e, ltc_speed, e2 - frames_per_ltc_frame));
+ last_timestamp = cur_timestamp;
+ last_ltc_sample = ltc_sample;
- }
- last_timestamp = now;
- last_ltc_frame = ltc_frame;
- have_frame = true;
- }
- return have_frame;
+ } /* end foreach decoded LTC sample */
}
-void
-LTC_Slave::init_ltc_dll(framepos_t tme, double dt)
+bool
+LTC_TransportMaster::speed_and_position (double& speed, samplepos_t& pos, samplepos_t now)
{
- omega = 2.0 * M_PI * dt / double(session.frame_rate());
- b = 1.4142135623730950488 * omega;
- c = omega * omega;
-
- e2 = dt;
- t0 = double(tme);
- t1 = t0 + e2;
- DEBUG_TRACE (DEBUG::LTC, string_compose ("[re-]init LTC DLL %1 %2 %3\n", t0, t1, e2));
+ if (!_collect || last_timestamp == 0) {
+ return false;
+ }
+
+ /* XXX these are not atomics and maybe modified in a thread other other than the one
+ that is executing this.
+ */
+
+ speed = ltc_speed;
+
+ /* provide a .1% deadzone to lock the speed */
+ if (fabs (speed - 1.0) <= 0.001) {
+ speed = 1.0;
+ }
+
+ if (speed != 0 && delayedlocked == 0 && fabs(speed) != 1.0) {
+ sync_lock_broken = true;
+ DEBUG_TRACE (DEBUG::LTC, string_compose ("LTC speed not locked %1 based on %2\n", speed, ltc_speed));
+ }
+
+ pos = last_ltc_sample;
+ pos += (now - last_timestamp) * speed;
+
+ return true;
}
-/* main entry point from session_process.cc
- * called from jack_process callback context
- */
-bool
-LTC_Slave::speed_and_position (double& speed, framepos_t& pos)
+void
+LTC_TransportMaster::pre_process (pframes_t nframes, samplepos_t now, boost::optional<samplepos_t> session_pos)
{
+ Sample* in = (Sample*) AudioEngine::instance()->port_engine().get_buffer (_port->port_handle(), nframes);
+ sampleoffset_t skip = now - (monotonic_cnt + nframes);
+ monotonic_cnt = now;
- framepos_t now = session.engine().frame_time_at_cycle_start();
- framecnt_t nframes = session.engine().frames_per_cycle();
- jack_default_audio_sample_t *in;
- jack_latency_range_t ltc_latency;
+ DEBUG_TRACE (DEBUG::LTC, string_compose ("pre-process - TID:%1 | latency: %2 | skip %3 | session ? %4| last %5 | dir %6 | sp %7\n",
+ pthread_name(), ltc_slave_latency.max, skip, (_session ? 'y' : 'n'), last_timestamp, transport_direction, ltc_speed));
- Port *ltcport = session.engine().ltc_input_port();
- ltcport->get_connected_latency_range(ltc_latency, false);
- in = (jack_default_audio_sample_t*) jack_port_get_buffer (ltcport->jack_port(), nframes);
+ if (last_timestamp == 0) {
+ if (delayedlocked < 10) {
+ ++delayedlocked;
+ }
- DEBUG_TRACE (DEBUG::LTC, string_compose ("LTC_Slave::speed_and_position - TID:%1 | latency: %2\n", ::pthread_self(), ltc_latency.max));
+ } else if (ltc_speed != 0) {
- if (in) {
- parse_ltc(nframes, in, now + ltc_latency.max );
- if (!process_ltc(now, nframes)) {
- /* fly wheel */
- double elapsed = (now - last_timestamp) * ltc_speed;
- ltc_transport_pos = last_ltc_frame + elapsed;
- DEBUG_TRACE (DEBUG::LTC, string_compose ("LTC fly wheel elapsed: %1 @speed %2\n", elapsed, ltc_speed));
- }
}
- if (((now - last_timestamp) > 4 * frames_per_ltc_frame) ) {
- DEBUG_TRACE (DEBUG::LTC, "LTC no-signal - reset\n");
- speed = ltc_speed = 0;
- pos = session.transport_frame();
- last_timestamp = 0;
- return true;
+ DEBUG_TRACE (DEBUG::LTC, string_compose ("pre-process with audio clock time: %1\n", now));
+
+ /* if the audioengine failed to take the process lock, it won't
+ call this method, and time will appear to skip. Reset the
+ LTC decoder's state by giving it some silence.
+ */
+
+ if (skip > 0) {
+ DEBUG_TRACE (DEBUG::LTC, string_compose("engine skipped %1 samples. Feeding silence to LTC parser.\n", skip));
+ if (skip >= 8192) skip = 8192;
+ unsigned char sound[8192];
+ memset (sound, 0x80, sizeof(char) * skip);
+ ltc_decoder_write (decoder, sound, nframes, now);
+ } else if (skip != 0) {
+ /* this should never happen. it may if monotonic_cnt, now overflow on 64bit */
+ DEBUG_TRACE (DEBUG::LTC, string_compose("engine skipped %1 samples\n", skip));
+ reset();
}
- pos = ltc_transport_pos;
- speed = ltc_speed;
+ /* Now feed the incoming LTC signal into the decoder */
- return true;
+ parse_ltc (nframes, in, now);
+
+ /* and pull out actual LTC frame data */
+
+ process_ltc (now);
+
+ if (last_timestamp == 0) {
+ DEBUG_TRACE (DEBUG::LTC, "last timestamp == 0\n");
+ return;
+ } else if (ltc_speed != 0) {
+ DEBUG_TRACE (DEBUG::LTC, string_compose ("speed non-zero (%1)\n", ltc_speed));
+ if (delayedlocked > 1) {
+ delayedlocked--;
+ } else if (_current_delta == 0) {
+ delayedlocked = 0;
+ }
+ }
+
+ if (abs (now - last_timestamp) > FLYWHEEL_TIMEOUT) {
+ DEBUG_TRACE (DEBUG::LTC, "flywheel timeout\n");
+ reset();
+ /* don't change position from last known */
+
+ return;
+ }
+
+ if (session_pos) {
+ const samplepos_t current_pos = last_ltc_sample + ((now - last_timestamp) * ltc_speed);
+ _current_delta = current_pos - *session_pos;
+ } else {
+ _current_delta = 0;
+ }
}
Timecode::TimecodeFormat
-LTC_Slave::apparent_timecode_format () const
+LTC_TransportMaster::apparent_timecode_format () const
+{
+ if (timecode.rate == 24 && !timecode.drop)
+ return timecode_24;
+ else if (timecode.rate == 25 && !timecode.drop)
+ return timecode_25;
+ else if (rint(timecode.rate * 100) == 2997 && !timecode.drop)
+ return (fr2997() ? timecode_2997000 : timecode_2997);
+ else if (rint(timecode.rate * 100) == 2997 && timecode.drop)
+ return (fr2997() ? timecode_2997000drop : timecode_2997drop);
+ else if (timecode.rate == 30 && timecode.drop)
+ return timecode_2997drop; // timecode_30drop; // LTC counting to 30 samples w/DF *means* 29.97 df
+ else if (timecode.rate == 30 && !timecode.drop)
+ return timecode_30;
+
+ /* XXX - unknown timecode format */
+ return _session->config.get_timecode_format();
+}
+
+std::string
+LTC_TransportMaster::position_string() const
{
- /* XXX to be computed, determined from incoming stream */
- return timecode_25;
+ if (!_collect || last_timestamp == 0) {
+ return " --:--:--:--";
+ }
+ return Timecode::timecode_format_time(timecode);
}
-std::string
-LTC_Slave::approximate_current_position() const
+std::string
+LTC_TransportMaster::delta_string() const
{
- return "88:88:88:88";
+ char delta[80];
+
+ if (!_collect || last_timestamp == 0) {
+ snprintf (delta, sizeof(delta), "\u2012\u2012\u2012\u2012");
+ } else if ((monotonic_cnt - last_timestamp) > 2 * samples_per_ltc_frame) {
+ snprintf (delta, sizeof(delta), "%s", _("flywheel"));
+ } else {
+ snprintf (delta, sizeof(delta), "\u0394<span foreground=\"%s\" face=\"monospace\" >%s%s%lld</span>sm",
+ sync_lock_broken ? "red" : "green",
+ LEADINGZERO(::llabs(_current_delta)), PLUSMINUS(-_current_delta), ::llabs(_current_delta));
+ }
+
+ return delta;
}
projects / ardour.git / blobdiff