*/
#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;
-#define FLYWHEEL_TIMEOUT ( 1 * session.frame_rate() )
+#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)
+ , delayedlocked (10)
+ , ltc_detect_fps_cnt (0)
+ , ltc_detect_fps_max (0)
+ , sync_lock_broken (false)
+{
+ 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));
+
+ resync_latency();
-LTC_Slave::LTC_Slave (Session& s)
- : session (s)
+ 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));
+}
+
+void
+LTC_TransportMaster::init ()
{
- frames_per_ltc_frame = session.frames_per_timecode_frame();
- timecode.rate = session.timecode_frames_per_second();
- timecode.drop = session.timecode_drop_frames();
+ reset (true);
+}
- did_reset_tc_format = false;
- delayedlocked = 10;
- monotonic_cnt = 0;
- fps_detected=false;
+void
+LTC_TransportMaster::set_session (Session *s)
+{
+ config_connection.disconnect ();
+ _session = s;
- ltc_timecode = session.config.get_timecode_format();
- a3e_timecode = session.config.get_timecode_format();
- printed_timecode_warning = false;
- ltc_detect_fps_cnt = ltc_detect_fps_max = 0;
- memset(&prev_frame, 0, sizeof(LTCFrameExt));
+ if (_session) {
- decoder = ltc_decoder_create((int) frames_per_ltc_frame, 128 /*queue size*/);
+ 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();
- session.config.ParameterChanged.connect_same_thread (config_connection, boost::bind (<C_Slave::parameter_changed, this, _1));
- parse_timecode_offset();
- reset();
- resync_latency();
- session.Xrun.connect_same_thread (port_connections, boost::bind (<C_Slave::resync_xrun, this));
- session.engine().GraphReordered.connect_same_thread (port_connections, boost::bind (<C_Slave::resync_latency, this));
+ 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_Slave::~LTC_Slave()
+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);
}
void
-LTC_Slave::parse_timecode_offset() {
+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::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;
}
void
-LTC_Slave::parameter_changed (std::string const & p)
+LTC_TransportMaster::parameter_changed (std::string const & p)
{
if (p == "slave-timecode-offset"
|| p == "timecode-format"
}
}
-ARDOUR::framecnt_t
-LTC_Slave::resolution () const
+ARDOUR::samplecnt_t
+LTC_TransportMaster::update_interval() const
+{
+ if (timecode.rate) {
+ return AudioEngine::instance()->sample_rate() / timecode.rate;
+ }
+
+ return AudioEngine::instance()->sample_rate(); /* useless but what other answer is there? */
+}
+
+ARDOUR::samplecnt_t
+LTC_TransportMaster::resolution () const
{
- return (framecnt_t) (session.frame_rate() / 1000);
+ return (samplecnt_t) (ENGINE->sample_rate() / 1000);
}
bool
-LTC_Slave::locked () const
+LTC_TransportMaster::locked () const
{
return (delayedlocked < 5);
}
bool
-LTC_Slave::ok() const
+LTC_TransportMaster::ok() const
{
return true;
}
void
-LTC_Slave::resync_xrun()
+LTC_TransportMaster::resync_xrun()
{
DEBUG_TRACE (DEBUG::LTC, "LTC resync_xrun()\n");
- engine_dll_initstate = 0;
+ sync_lock_broken = false;
}
void
-LTC_Slave::resync_latency()
+LTC_TransportMaster::resync_latency()
{
DEBUG_TRACE (DEBUG::LTC, "LTC resync_latency()\n");
- engine_dll_initstate = 0;
+ sync_lock_broken = false;
- if (!session.deletion_in_progress() && session.ltc_output_io()) { /* check if Port exits */
- boost::shared_ptr<Port> ltcport = session.ltc_input_port();
- ltcport->get_connected_latency_range (ltc_slave_latency, false);
+ if (!_port) {
+ _port->get_connected_latency_range (ltc_slave_latency, false);
}
}
void
-LTC_Slave::reset()
+LTC_TransportMaster::reset (bool with_ts)
{
DEBUG_TRACE (DEBUG::LTC, "LTC reset()\n");
- last_timestamp = 0;
- current_delta = 0;
+ if (with_ts) {
+ current.update (current.position, 0, current.speed);
+ _current_delta = 0;
+ }
transport_direction = 0;
- ltc_speed = 0;
- engine_dll_initstate = 0;
+ sync_lock_broken = false;
+ monotonic_cnt = 0;
}
void
-LTC_Slave::parse_ltc(const pframes_t nframes, const Sample* const in, const framecnt_t posinfo)
+LTC_TransportMaster::parse_ltc (const ARDOUR::pframes_t nframes, const Sample* const in, const ARDOUR::samplecnt_t posinfo)
{
pframes_t i;
unsigned char sound[8192];
+
if (nframes > 8192) {
/* TODO warn once or wrap, loop conversion below
* does jack/A3 support > 8192 spp anyway?
}
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);
+
+ ltc_decoder_write (decoder, sound, nframes, posinfo);
+
return;
}
bool
-LTC_Slave::equal_ltc_frame_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
- ) {
+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_Slave::detect_discontinuity(LTCFrameExt *frame, int fps, bool fuzzy) {
+LTC_TransportMaster::detect_discontinuity(LTCFrameExt *sample, int fps, bool fuzzy) {
bool discontinuity_detected = false;
if (fuzzy && (
- ( frame->reverse && prev_frame.ltc.frame_units == 0)
- ||(!frame->reverse && frame->ltc.frame_units == 0)
+ ( sample->reverse && prev_sample.ltc.frame_units == 0)
+ ||(!sample->reverse && sample->ltc.frame_units == 0)
)) {
- memcpy(&prev_frame, frame, sizeof(LTCFrameExt));
+ memcpy(&prev_sample, sample, sizeof(LTCFrameExt));
return false;
}
- if (frame->reverse) {
- ltc_frame_decrement(&prev_frame.ltc, fps, LTC_TV_525_60, 0);
+ if (sample->reverse) {
+ ltc_frame_decrement(&prev_sample.ltc, fps, LTC_TV_525_60, 0);
} else {
- ltc_frame_increment(&prev_frame.ltc, fps, LTC_TV_525_60, 0);
+ ltc_frame_increment(&prev_sample.ltc, fps, LTC_TV_525_60, 0);
}
- if (!equal_ltc_frame_time(&prev_frame.ltc, &frame->ltc)) {
+ if (!equal_ltc_sample_time(&prev_sample.ltc, &sample->ltc)) {
discontinuity_detected = true;
}
- memcpy(&prev_frame, frame, sizeof(LTCFrameExt));
+ memcpy(&prev_sample, sample, sizeof(LTCFrameExt));
return discontinuity_detected;
}
bool
-LTC_Slave::detect_ltc_fps(int frameno, bool df)
+LTC_TransportMaster::detect_ltc_fps(int frameno, bool df)
{
bool fps_changed = false;
double detected_fps = 0;
detected_fps = ltc_detect_fps_max + 1;
if (df) {
/* LTC df -> indicates fractional framerate */
- if (Config->get_timecode_source_2997()) {
+ if (fr2997()) {
detected_fps = detected_fps * 999.0 / 1000.0;
} else {
detected_fps = detected_fps * 1000.0 / 1001.0;
if (detected_fps != 0 && (detected_fps != timecode.rate || df != timecode.drop)) {
timecode.rate = detected_fps;
timecode.drop = df;
- frames_per_ltc_frame = double(session.frame_rate()) / timecode.rate;
- DEBUG_TRACE (DEBUG::LTC, string_compose ("LTC reset to FPS: %1%2 ; audio-frames per LTC: %3\n",
- detected_fps, df?"df":"ndf", frames_per_ltc_frame));
+ 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();
+ TimecodeFormat cur_timecode = _session->config.get_timecode_format();
if (Config->get_timecode_sync_frame_rate()) {
/* enforce time-code */
Timecode::timecode_format_name(tc_format))
<< endmsg;
}
- session.config.set_timecode_format (tc_format);
+ _session->config.set_timecode_format (tc_format);
}
} else {
/* only warn about TC mismatch */
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_Slave::process_ltc(framepos_t const /*now*/)
+LTC_TransportMaster::process_ltc(samplepos_t const now)
{
- LTCFrameExt frame;
- enum LTC_TV_STANDARD tv_standard = LTC_TV_625_50;
- while (ltc_decoder_read(decoder, &frame)) {
+ LTCFrameExt sample;
+ LTC_TV_STANDARD tv_standard = LTC_TV_625_50;
+
+ while (ltc_decoder_read (decoder, &sample)) {
+
SMPTETimecode stime;
- ltc_frame_to_time(&stime, &frame.ltc, 0);
+ ltc_frame_to_time (&stime, &sample.ltc, 0);
timecode.negative = false;
timecode.subframes = 0;
/* set timecode.rate and timecode.drop: */
- bool ltc_is_static = equal_ltc_frame_time(&prev_frame.ltc, &frame.ltc);
- if (detect_discontinuity(&frame, ceil(timecode.rate), !fps_detected)) {
- if (fps_detected) { ltc_detect_fps_cnt = ltc_detect_fps_max = 0; }
- fps_detected=false;
+ 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_static && detect_ltc_fps(stime.frame, (frame.ltc.dfbit)? true : false)) {
+ if (!ltc_is_stationary && detect_ltc_fps (stime.frame, (sample.ltc.dfbit)? true : false)) {
reset();
fps_detected=true;
}
-#if 0 // Devel/Debug
- 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" : " "
- );
+#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 frame is decoded, the timecode the LTC frame
+ /* 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);
break;
}
- if (!frame.reverse) {
- ltc_frame_increment(&frame.ltc, fps_i, tv_standard, 0);
- ltc_frame_to_time(&stime, &frame.ltc, 0);
+ if (!sample.reverse) {
+ ltc_frame_increment(&sample.ltc, fps_i, tv_standard, 0);
+ ltc_frame_to_time(&stime, &sample.ltc, 0);
transport_direction = 1;
- frame.off_start -= ltc_frame_alignment(session.frames_per_timecode_frame(), tv_standard);
- frame.off_end -= ltc_frame_alignment(session.frames_per_timecode_frame(), tv_standard);
+ 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, tv_standard, 0);
- int off = frame.off_end - frame.off_start;
- frame.off_start += off - ltc_frame_alignment(session.frames_per_timecode_frame(), tv_standard);
- frame.off_end += off - ltc_frame_alignment(session.frames_per_timecode_frame(), tv_standard);
+ 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.seconds = stime.secs;
timecode.frames = stime.frame;
- /* map LTC timecode to session TC setting */
- framepos_t ltc_frame; ///< audio-frame corresponding to LTC frame
- Timecode::timecode_to_sample (timecode, ltc_frame, true, false,
- double(session.frame_rate()),
- session.config.get_subframes_per_frame(),
- timecode_negative_offset, timecode_offset
- );
-
- framepos_t cur_timestamp = frame.off_end + 1;
- DEBUG_TRACE (DEBUG::LTC, string_compose ("LTC F: %1 LF: %2 N: %3 L: %4\n", ltc_frame, last_ltc_frame, cur_timestamp, last_timestamp));
- if (frame.off_end + 1 <= last_timestamp || last_timestamp == 0) {
- DEBUG_TRACE (DEBUG::LTC, string_compose ("LTC speed: UNCHANGED: %1\n", ltc_speed));
+ samplepos_t ltc_sample; // audio-sample corresponding to position of LTC frame
+
+ 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 {
- ltc_speed = double(ltc_frame - last_ltc_frame) / double(cur_timestamp - last_timestamp);
- DEBUG_TRACE (DEBUG::LTC, string_compose ("LTC speed: %1\n", ltc_speed));
+ Timecode::timecode_to_sample (timecode, ltc_sample, true, false, (double)ENGINE->sample_rate(), 100, timecode_negative_offset, timecode_offset);
}
- if (fabs(ltc_speed) > 10.0) {
- ltc_speed = 0;
- }
+ 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.
+ *
+ */
- last_timestamp = frame.off_end + 1;
- last_ltc_frame = ltc_frame;
- } /* end foreach decoded LTC frame */
-}
+ samplepos_t cur_timestamp = sample.off_end + 1;
+ double ltc_speed = current.speed;
-void
-LTC_Slave::init_engine_dll (framepos_t pos, int32_t inc)
-{
- double omega = 2.0 * M_PI * double(inc) / double(session.frame_rate());
- b = 1.4142135623730950488 * omega;
- c = omega * omega;
-
- e2 = double(ltc_speed * inc);
- t0 = double(pos);
- t1 = t0 + e2;
- DEBUG_TRACE (DEBUG::LTC, string_compose ("[re-]init Engine DLL %1 %2 %3\n", t0, t1, e2));
-}
+ DEBUG_TRACE (DEBUG::LTC, string_compose ("LTC S: %1 LS: %2 N: %3 L: %4 span %5..%6\n", ltc_sample, current.position, cur_timestamp, current.timestamp, sample.off_start, sample.off_end));
-/* main entry point from session_process.cc
- * called from process callback context
- * so it is OK to use get_buffer()
- */
-bool
-LTC_Slave::speed_and_position (double& speed, framepos_t& pos)
-{
- bool engine_init_called = false;
- framepos_t now = session.engine().sample_time_at_cycle_start();
- framepos_t sess_pos = session.transport_frame(); // corresponds to now
- framecnt_t nframes = session.engine().samples_per_cycle();
+ if (cur_timestamp <= current.timestamp || current.timestamp == 0) {
+ DEBUG_TRACE (DEBUG::LTC, string_compose ("LTC speed: UNCHANGED: %1\n", current.speed));
+ } else {
+ ltc_speed = double (ltc_sample - current.position) / double (cur_timestamp - current.timestamp);
+
+ /* provide a .1% deadzone to lock the speed */
+ if (fabs (ltc_speed - 1.0) <= 0.001) {
+ ltc_speed = 1.0;
+ }
- Sample* in;
+ if (fabs (ltc_speed) > 10.0) {
+ ltc_speed = 0;
+ }
- boost::shared_ptr<Port> ltcport = session.ltc_input_port();
+ DEBUG_TRACE (DEBUG::LTC, string_compose ("LTC speed: %1\n", ltc_speed));
+ }
+ DEBUG_TRACE (DEBUG::LTC, string_compose ("update current to %1 %2 %3\n", ltc_sample, cur_timestamp, ltc_speed));
+ current.update (ltc_sample, cur_timestamp, ltc_speed);
- in = (Sample*) AudioEngine::instance()->port_engine().get_buffer (ltcport->port_handle(), nframes);
+ } /* end foreach decoded LTC sample */
+}
- frameoffset_t skip = now - (monotonic_cnt + nframes);
+void
+LTC_TransportMaster::pre_process (ARDOUR::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;
- DEBUG_TRACE (DEBUG::LTC, string_compose ("speed_and_position - TID:%1 | latency: %2 | skip %3\n", ::pthread_self(), ltc_slave_latency.max, skip));
- if (last_timestamp == 0) {
- engine_dll_initstate = 0;
- delayedlocked++;
- }
- else if (engine_dll_initstate != transport_direction && ltc_speed != 0) {
- engine_dll_initstate = transport_direction;
- init_engine_dll(last_ltc_frame + rint(ltc_speed * double(2 * nframes + now - last_timestamp)),
- session.engine().samples_per_cycle());
- engine_init_called = true;
- }
+ 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'), current.timestamp, transport_direction, current.speed));
- if (in) {
- DEBUG_TRACE (DEBUG::LTC, string_compose ("LTC Process eng-tme: %1 eng-pos: %2\n", now, sess_pos));
- /* when the jack-graph changes and if ardour performs
- * locates, the audioengine is stopped (skipping frames) while
- * jack [time] moves along.
- */
- if (skip > 0) {
- DEBUG_TRACE (DEBUG::LTC, string_compose("engine skipped %1 frames. Feeding silence to LTC parser.\n", skip));
- if (skip >= 8192) skip = 8192;
- unsigned char sound[8192];
- memset(sound, 0, 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 frames\n", skip));
- reset();
+ if (current.timestamp == 0) {
+ if (delayedlocked < 10) {
+ ++delayedlocked;
}
- parse_ltc(nframes, in, now - ltc_slave_latency.max );
- process_ltc(now);
- }
+ } else if (current.speed != 0) {
- if (last_timestamp == 0) {
- DEBUG_TRACE (DEBUG::LTC, "last timestamp == 0\n");
- speed = 0;
- pos = session.transport_frame();
- return true;
- } else if (ltc_speed != 0) {
- delayedlocked = 0;
}
- if (abs(now - last_timestamp) > FLYWHEEL_TIMEOUT) {
- DEBUG_TRACE (DEBUG::LTC, "flywheel timeout\n");
+ 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();
- speed = 0;
- pos = session.transport_frame();
- return true;
}
- /* it take 2 cycles from naught to rolling.
- * during these to initial cycles the speed == 0
- *
- * the first cycle:
- * DEBUG::Slave: slave stopped, move to NNN
- * DEBUG::Transport: Request forced locate to NNN
- * DEBUG::Slave: slave state 0 @ NNN speed 0 cur delta VERY-LARGE-DELTA avg delta 1800
- * DEBUG::Slave: silent motion
- * DEBUG::Transport: realtime stop @ NNN
- * DEBUG::Transport: Butler transport work, todo = PostTransportStop,PostTransportLocate,PostTransportClearSubstate
- *
- * [engine skips frames to locate, jack time keeps rolling on]
- *
- * the second cycle:
- *
- * DEBUG::LTC: [re-]init Engine DLL
- * DEBUG::Slave: slave stopped, move to NNN+
- * ...
- *
- * we need to seek two cycles ahead: 2 * nframes
- */
- if (engine_dll_initstate == 0) {
- DEBUG_TRACE (DEBUG::LTC, "engine DLL not initialized. ltc_speed\n");
- speed = 0;
- pos = last_ltc_frame + rint(ltc_speed * double(2 * nframes + now - last_timestamp));
- return true;
- }
+ /* Now feed the incoming LTC signal into the decoder */
- /* interpolate position according to speed and time since last LTC-frame*/
- double speed_flt = ltc_speed;
- double elapsed = (now - last_timestamp) * speed_flt;
-
- if (!engine_init_called) {
- const double e = elapsed + double (last_ltc_frame - sess_pos);
- t0 = t1;
- t1 += b * e + e2;
- e2 += c * e;
- speed_flt = (t1 - t0) / double(session.engine().samples_per_cycle());
- DEBUG_TRACE (DEBUG::LTC, string_compose ("LTC engine DLL t0:%1 t1:%2 err:%3 spd:%4 ddt:%5\n", t0, t1, e, speed_flt, e2 - session.engine().samples_per_cycle() ));
- } else {
- DEBUG_TRACE (DEBUG::LTC, string_compose ("LTC adjusting elapsed (no DLL) from %1 by %2\n", elapsed, (2 * nframes * ltc_speed)));
- speed_flt = 0;
- elapsed += 2.0 * nframes * ltc_speed; /* see note above */
- }
+ parse_ltc (nframes, in, now);
- pos = last_ltc_frame + rint(elapsed);
- speed = speed_flt;
- current_delta = (pos - sess_pos);
+ /* and pull out actual LTC frame data */
- if (((pos < 0) || (labs(current_delta) > 2 * session.frame_rate()))) {
- DEBUG_TRACE (DEBUG::LTC, string_compose ("LTC large drift: %1\n", current_delta));
- reset();
- speed = 0;
- pos = session.transport_frame();
- return true;
+ process_ltc (now);
+
+ if (current.timestamp == 0) {
+ DEBUG_TRACE (DEBUG::LTC, "last timestamp == 0\n");
+ return;
+ } else if (current.speed != 0) {
+ DEBUG_TRACE (DEBUG::LTC, string_compose ("speed non-zero (%1)\n", current.speed));
+ if (delayedlocked > 1) {
+ delayedlocked--;
+ } else if (_current_delta == 0) {
+ delayedlocked = 0;
+ }
}
- DEBUG_TRACE (DEBUG::LTC, string_compose ("LTCsync spd: %1 pos: %2 | last-pos: %3 elapsed: %4 delta: %5\n",
- speed, pos, last_ltc_frame, elapsed, current_delta));
+ if (abs (now - current.timestamp) > FLYWHEEL_TIMEOUT) {
+ DEBUG_TRACE (DEBUG::LTC, "flywheel timeout\n");
+ reset();
+ /* don't change position from last known */
- /* provide a .1% deadzone to lock the speed */
- if (fabs(speed - 1.0) <= 0.001) {
- speed = 1.0;
+ return;
}
- return true;
+ if (!sync_lock_broken && current.speed != 0 && delayedlocked == 0 && fabs(current.speed) != 1.0) {
+ sync_lock_broken = true;
+ DEBUG_TRACE (DEBUG::LTC, string_compose ("LTC speed not locked based on %1\n", current.speed));
+ }
+
+ if (session_pos) {
+ const samplepos_t current_pos = current.position + ((now - current.timestamp) * current.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 (Config->get_timecode_source_2997() ? timecode_2997000 : timecode_2997);
+ return (fr2997() ? timecode_2997000 : timecode_2997);
else if (rint(timecode.rate * 100) == 2997 && timecode.drop)
- return (Config->get_timecode_source_2997() ? timecode_2997000drop : timecode_2997drop);
+ return (fr2997() ? timecode_2997000drop : timecode_2997drop);
else if (timecode.rate == 30 && timecode.drop)
- return timecode_2997drop; // timecode_30drop; // LTC counting to 30 frames w/DF *means* 29.97 df
+ 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();
+ return _session->config.get_timecode_format();
}
std::string
-LTC_Slave::approximate_current_position() const
+LTC_TransportMaster::position_string() const
{
- if (last_timestamp == 0) {
+ if (!_collect || current.timestamp == 0) {
return " --:--:--:--";
}
return Timecode::timecode_format_time(timecode);
}
std::string
-LTC_Slave::approximate_current_delta() const
+LTC_TransportMaster::delta_string() const
{
char delta[80];
- if (last_timestamp == 0 || engine_dll_initstate == 0) {
- snprintf(delta, sizeof(delta), "\u2012\u2012\u2012\u2012");
- } else if ((monotonic_cnt - last_timestamp) > 2 * frames_per_ltc_frame) {
- snprintf(delta, sizeof(delta), "%s", _("flywheel"));
+
+ if (!_collect || current.timestamp == 0) {
+ snprintf (delta, sizeof(delta), "\u2012\u2012\u2012\u2012");
+ } else if ((monotonic_cnt - current.timestamp) > 2 * samples_per_ltc_frame) {
+ snprintf (delta, sizeof(delta), "%s", _("flywheel"));
} else {
- snprintf(delta, sizeof(delta), "\u0394<span foreground=\"green\" face=\"monospace\" >%s%s%" PRIi64 "</span>sm",
- LEADINGZERO(abs(current_delta)), PLUSMINUS(-current_delta), abs(current_delta));
+ 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 std::string(delta);
+
+ return delta;
}
projects / ardour.git / blobdiff