*/
#include <iostream>
#include <errno.h>
-#include <poll.h>
#include <sys/types.h>
#include <unistd.h>
#include "pbd/error.h"
+#include "pbd/pthread_utils.h"
#include "ardour/debug.h"
#include "ardour/slave.h"
using namespace PBD;
using namespace Timecode;
-#define FLYWHEEL_TIMEOUT ( 3 * session.frame_rate() )
+#define FLYWHEEL_TIMEOUT ( 1 * session.frame_rate() )
LTC_Slave::LTC_Slave (Session& s)
: session (s)
{
- frames_per_ltc_frame = session.frames_per_timecode_frame(); // XXX at most 30fps ?
+ frames_per_ltc_frame = session.frames_per_timecode_frame();
timecode.rate = session.timecode_frames_per_second();
timecode.drop = session.timecode_drop_frames();
- ltc_transport_pos = 0;
did_reset_tc_format = false;
delayedlocked = 10;
- engine_dll_initstate = 0;
monotonic_cnt = 0;
+ fps_detected=false;
- memset(&prev_ltc_frame, 0, sizeof(LTCFrame));
-
- ltc_timecode = timecode_60; // track changes of LTC timecode
- a3e_timecode = timecode_60; // track canges of Ardour's timecode
+ 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));
decoder = ltc_decoder_create((int) frames_per_ltc_frame, 128 /*queue size*/);
+
+ session.config.ParameterChanged.connect_same_thread (config_connection, boost::bind (<C_Slave::parameter_changed, this, _1));
+ parse_timecode_offset();
reset();
- //session.engine().Xrun.connect_same_thread (*this, boost::bind (<C_Slave::reset, this));
+ 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));
}
LTC_Slave::~LTC_Slave()
{
+ port_connections.drop_connections();
+ config_connection.disconnect();
+
if (did_reset_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_Slave::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_Slave::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
+LTC_Slave::resolution () const
{
- return 0;
+ return (framecnt_t) (session.frame_rate() / 1000);
}
bool
return true;
}
+void
+LTC_Slave::resync_xrun()
+{
+ DEBUG_TRACE (DEBUG::LTC, "LTC resync_xrun()\n");
+ engine_dll_initstate = 0;
+}
+
+void
+LTC_Slave::resync_latency()
+{
+ DEBUG_TRACE (DEBUG::LTC, "LTC resync_latency()\n");
+ engine_dll_initstate = 0;
+
+ 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);
+ }
+}
+
void
LTC_Slave::reset()
{
DEBUG_TRACE (DEBUG::LTC, "LTC reset()\n");
- frames_in_sequence = 0;
- ltc_detect_fps_cnt = ltc_detect_fps_max = 0;
last_timestamp = 0;
current_delta = 0;
transport_direction = 0;
ltc_speed = 0;
- ltc_decoder_queue_flush(decoder);
+ engine_dll_initstate = 0;
}
-int
-LTC_Slave::parse_ltc(const jack_nframes_t nframes, const jack_default_audio_sample_t * const in, const framecnt_t posinfo)
+void
+LTC_Slave::parse_ltc(const ARDOUR::pframes_t nframes, const Sample* const in, const ARDOUR::framecnt_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);
sound[i] = (unsigned char) (snd&0xff);
}
ltc_decoder_write(decoder, sound, nframes, posinfo);
- return 0;
+ 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
+ ) {
+ return false;
+ }
+ return true;
+}
+
+bool
+LTC_Slave::detect_discontinuity(LTCFrameExt *frame, 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)
+ )) {
+ memcpy(&prev_frame, frame, sizeof(LTCFrameExt));
+ return false;
+ }
+
+ if (frame->reverse) {
+ ltc_frame_decrement(&prev_frame.ltc, fps, LTC_TV_525_60, 0);
+ } else {
+ ltc_frame_increment(&prev_frame.ltc, fps, LTC_TV_525_60, 0);
+ }
+ if (!equal_ltc_frame_time(&prev_frame.ltc, &frame->ltc)) {
+ discontinuity_detected = true;
+ }
+
+ memcpy(&prev_frame, frame, sizeof(LTCFrameExt));
+ return discontinuity_detected;
}
bool
LTC_Slave::detect_ltc_fps(int frameno, bool df)
{
+ 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 > 60)
- {
- if (ltc_detect_fps_cnt > ltc_detect_fps_max
- && ( ceil(timecode.rate) != (ltc_detect_fps_max + 1)
- || timecode.drop != df
- )
- )
- {
- DEBUG_TRACE (DEBUG::LTC, string_compose ("LTC detected FPS %1%2",
- ltc_detect_fps_max + 1, timecode.drop ? "df" : ""));
+
+ 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 */
- detected_fps = detected_fps * 1000.0 / 1001.0;
+ if (Config->get_timecode_source_2997()) {
+ 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 */
}
- DEBUG_TRACE (DEBUG::LTC, string_compose ("LTC detected FPS: %1%2\n", detected_fps, df?"df":"ndf"));
}
ltc_detect_fps_cnt = ltc_detect_fps_max = 0;
}
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));
- return true; // reset()
+ fps_changed=true;
}
/* poll and check session TC */
- if (1) {
- TimecodeFormat tc_format = apparent_timecode_format();
- TimecodeFormat cur_timecode = session.config.get_timecode_format();
- 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) {
- warning << string_compose(_("Session framerate adjusted from %1 TO: LTC's %2."),
+ TimecodeFormat tc_format = apparent_timecode_format();
+ TimecodeFormat cur_timecode = session.config.get_timecode_format();
+
+ 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;
+ }
+ } 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 (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;
}
+ printed_timecode_warning = true;
}
- ltc_timecode = tc_format;
- a3e_timecode = cur_timecode;
}
- return false;
-}
+ ltc_timecode = tc_format;
+ a3e_timecode = cur_timecode;
-bool
-LTC_Slave::detect_ltc_discontinuity(LTCFrameExt *frame) {
- bool discontinuity_detected = false;
- /* detect discontinuities */
- if (frame->reverse) {
- ltc_frame_decrement(&prev_ltc_frame, ceil(timecode.rate), 0);
- } else {
- ltc_frame_increment(&prev_ltc_frame, ceil(timecode.rate), 0);
- }
-
- if (memcmp(&prev_ltc_frame, &frame->ltc, sizeof(LTCFrame))) {
- discontinuity_detected = true;
- }
- memcpy(&prev_ltc_frame, &frame->ltc, sizeof(LTCFrame));
-
- /* notfify about discontinuities */
- if (frames_in_sequence > 0 && discontinuity_detected) {
- DEBUG_TRACE (DEBUG::LTC, "# LTC DISCONTINUITY\n");
- frames_in_sequence=0;
- return true;
- }
- frames_in_sequence++;
-
- return false;
+ return fps_changed;
}
-bool
-LTC_Slave::process_ltc(framepos_t const now, framepos_t const sess_pos, framecnt_t const nframes)
+void
+LTC_Slave::process_ltc(framepos_t const /*now*/)
{
- bool have_frame = false;
- DEBUG_TRACE (DEBUG::LTC, string_compose ("LTC Process eng-tme: %1 eng-pos: %2\n", now, sess_pos));
-
LTCFrameExt frame;
- while (ltc_decoder_read(decoder,&frame)) {
- bool reinitialize_ltc_dll = false;
+ enum LTC_TV_STANDARD tv_standard = LTC_TV_625_50;
+ while (ltc_decoder_read(decoder, &frame)) {
SMPTETimecode stime;
ltc_frame_to_time(&stime, &frame.ltc, 0);
timecode.negative = false;
timecode.subframes = 0;
+
/* set timecode.rate and timecode.drop: */
- if (detect_ltc_fps(stime.frame, (frame.ltc.dfbit)? true : false)) {
- reset();
- break;
+ 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;
}
- if (detect_ltc_discontinuity(&frame)) {
- ltc_discontinuity = true;
+
+ if (!ltc_is_static && detect_ltc_fps(stime.frame, (frame.ltc.dfbit)? true : false)) {
+ reset();
+ fps_detected=true;
}
#if 0 // Devel/Debug
frame.off_end,
frame.reverse ? " R" : " "
);
-
- if (frames_in_sequence < 1) {
- fprintf(stdout, " ####### FIRST LTC FRAME in SEQ #######\n");
- }
-
- if (ltc_discontinuity) {
- fprintf(stdout, " ####### LTC DISCONTINUITY #######\n");
- }
#endif
- if (frames_in_sequence < 1) {
- continue;
- }
-
/* when a full LTC frame is decoded, the timecode the LTC frame
* is referring has just passed.
* So we send the _next_ timecode which
* is expected to start at the end of the current frame
*/
int fps_i = ceil(timecode.rate);
+
+ 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 (!frame.reverse) {
- ltc_frame_increment(&frame.ltc, fps_i , 0);
+ ltc_frame_increment(&frame.ltc, fps_i, tv_standard, 0);
ltc_frame_to_time(&stime, &frame.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);
} else {
- ltc_frame_decrement(&frame.ltc, fps_i , 0);
+ ltc_frame_decrement(&frame.ltc, fps_i, tv_standard, 0);
int off = frame.off_end - frame.off_start;
- frame.off_start += off;
- frame.off_end += off;
+ 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);
+ transport_direction = -1;
}
timecode.hours = stime.hours;
Timecode::timecode_to_sample (timecode, ltc_frame, true, false,
double(session.frame_rate()),
session.config.get_subframes_per_frame(),
- session.config.get_timecode_offset_negative(), session.config.get_timecode_offset()
+ timecode_negative_offset, timecode_offset
);
- /* (frame.off_end + 1) = start of next LTC frame */
- double poff = (frame.off_end + 1 - now);
- ltc_transport_pos = ltc_frame - poff;
-
-#if 0 // vari-speed LTC, no DLL
- frames_per_ltc_frame = 1 + frame.off_end - frame.off_start;
-#else
- frames_per_ltc_frame = (double(session.frame_rate()) / timecode.rate);
-#endif
-
- DEBUG_TRACE (DEBUG::LTC, string_compose ("LTC frame: %1 poff: %2 pos: %3\n", ltc_frame, poff, ltc_transport_pos));
-
- if (ltc_discontinuity) {
- ltc_discontinuity=false;
- if (ltc_speed==0
- || !locked()
- || (ltc_transport_pos - sess_pos) > FLYWHEEL_TIMEOUT)
- {
- engine_dll_initstate = 0;
- reset();
- }
- reinitialize_ltc_dll = true;
- }
-
- if (last_timestamp == 0
- || ((now - last_timestamp) > FLYWHEEL_TIMEOUT)
- || (abs(current_delta) > FLYWHEEL_TIMEOUT) // TODO LTC-delta not engine delta
- || (frame.reverse && transport_direction != -1)
- || (!frame.reverse && transport_direction != 1)
- ) {
- reinitialize_ltc_dll = true;
- engine_dll_initstate = 0;
- reset();
- }
-
- if (reinitialize_ltc_dll) {
- init_ltc_dll(ltc_transport_pos, frames_per_ltc_frame);
-
- if (ltc_speed==0 || !locked()) {
- if (frame.reverse) {
- transport_direction = -1;
- ltc_transport_pos -= nframes * rint((2 * frames_per_ltc_frame + poff)/nframes);
- } else {
- transport_direction = 1;
- ltc_transport_pos += nframes * rint((2 * frames_per_ltc_frame + poff)/nframes);
- }
- }
-
+ 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));
} else {
- // update DLL
- double e = (double(ltc_frame) - poff - double(sess_pos));
- t0 = t1;
- t1 += b * e + e2;
- e2 += c * e;
-
- ltc_speed = (t1 - t0) / frames_per_ltc_frame;
- current_delta = (ltc_transport_pos - sess_pos);
- 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));
+ 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));
+ }
+ if (fabs(ltc_speed) > 10.0) {
+ ltc_speed = 0;
}
- /* the are equivalent
- * TODO: choose the value with larger diff ->
- * minimize roundig errors when extrapolating
- */
-#if 1
- last_timestamp = now;
- last_ltc_frame = ltc_transport_pos;
-#else
last_timestamp = frame.off_end + 1;
last_ltc_frame = ltc_frame;
-#endif
-
- have_frame = true;
} /* end foreach decoded LTC frame */
-
- return have_frame;
}
void
-LTC_Slave::init_ltc_dll(framepos_t const tme, double const dt)
+LTC_Slave::init_engine_dll (framepos_t pos, int32_t inc)
{
- omega = 2.0 * M_PI * dt / double(session.frame_rate());
+ double omega = 2.0 * M_PI * double(inc) / double(session.frame_rate());
b = 1.4142135623730950488 * omega;
c = omega * omega;
- e2 = dt;
- t0 = double(tme);
+ e2 = double(ltc_speed * inc);
+ t0 = double(pos);
t1 = t0 + e2;
- DEBUG_TRACE (DEBUG::LTC, string_compose ("[re-]init LTC DLL %1 %2 %3\n", t0, t1, e2));
-}
-
-void
-LTC_Slave::init_engine_dll (framepos_t pos, framepos_t inc)
-{
- /* the bandwidth of the DLL is a trade-off,
- * because the max-speed of the transport in ardour is
- * limited to +-8.0, a larger bandwidth would cause oscillations
- *
- * But this is only really a problem if the user performs manual
- * seeks while transport is running and slaved to LTC.
- */
- oe = 2.0 * M_PI * double(inc/2.0) / double(session.frame_rate());
- be = 1.4142135623730950488 * oe;
- ce = oe * oe;
-
- ee2 = double(transport_direction * inc);
- te0 = double(pos);
- te1 = te0 + ee2;
- DEBUG_TRACE (DEBUG::LTC, string_compose ("[re-]init Engine DLL %1 %2 %3\n", te0, te1, ee2));
+ DEBUG_TRACE (DEBUG::LTC, string_compose ("[re-]init Engine DLL %1 %2 %3\n", t0, t1, e2));
}
/* main entry point from session_process.cc
- * called from jack_process callback context
- * so it is OK to use jack_port_get_buffer() etc
+ * called from process callback context
+ * so it is OK to use get_buffer()
*/
bool
LTC_Slave::speed_and_position (double& speed, framepos_t& pos)
{
- //framepos_t now = session.engine().frame_time_at_cycle_start();
- //framepos_t now = session.engine().processed_frames();
- framepos_t now = monotonic_cnt;
+ 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().frames_per_cycle();
- jack_default_audio_sample_t *in;
- jack_latency_range_t ltc_latency;
+ framecnt_t nframes = session.engine().samples_per_cycle();
+
+ Sample* in;
- monotonic_cnt += nframes;
+ boost::shared_ptr<Port> ltcport = session.ltc_input_port();
- boost::shared_ptr<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);
+ in = (Sample*) AudioEngine::instance()->port_engine().get_buffer (ltcport->port_handle(), nframes);
- DEBUG_TRACE (DEBUG::LTC, string_compose ("LTC_Slave::speed_and_position - TID:%1 | latency: %2\n", ::pthread_self(), ltc_latency.max));
+ frameoffset_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_name(), ltc_slave_latency.max, skip));
if (last_timestamp == 0) {
engine_dll_initstate = 0;
delayedlocked++;
}
- else if (engine_dll_initstate != transport_direction) {
+ else if (engine_dll_initstate != transport_direction && ltc_speed != 0) {
engine_dll_initstate = transport_direction;
- init_engine_dll(last_ltc_frame, session.engine().frames_per_cycle());
+ init_engine_dll(last_ltc_frame + rint(ltc_speed * double(2 * nframes + now - last_timestamp)),
+ session.engine().samples_per_cycle());
+ engine_init_called = true;
}
if (in) {
- parse_ltc(nframes, in, now + ltc_latency.max );
- if (!process_ltc(now, sess_pos, nframes) && ltc_speed != 0) {
+ 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();
}
- }
- /* interpolate position according to speed and time since last LTC-frame*/
- double speed_flt = ltc_speed;
- framecnt_t elapsed;
- if (speed_flt == 0.0f) {
- elapsed = 0;
- } else {
- /* scale elapsed time by the current LTC speed */
- if (last_timestamp && (now > last_timestamp)) {
- elapsed = (now - last_timestamp) * speed_flt;
- } else {
- elapsed = 0;
- }
- /* update engine DLL and calculate speed */
- const double e = double (last_ltc_frame + elapsed - sess_pos);
- te0 = te1;
- te1 += be * e + ee2;
- ee2 += ce * e;
- speed_flt = (te1 - te0) / double(session.engine().frames_per_cycle());
- DEBUG_TRACE (DEBUG::LTC, string_compose ("LTC engine DLL t0:%1 t1:%2 err:%3 spd:%4 ddt:%5\n", te0, te1, e, speed_flt, ee2 - session.engine().frames_per_cycle() ));
+ parse_ltc(nframes, in, now - ltc_slave_latency.max );
+ process_ltc(now);
}
- pos = last_ltc_frame + elapsed;
- speed = speed_flt;
- current_delta = (pos - sess_pos);
-
- 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 (last_timestamp != 0 /* && frames_in_sequence > 8*/) {
+ 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 (last_timestamp == 0 || ((now - last_timestamp) > FLYWHEEL_TIMEOUT)) {
- DEBUG_TRACE (DEBUG::LTC, "LTC no-signal - reset\n");
+ if (abs(now - last_timestamp) > FLYWHEEL_TIMEOUT) {
+ DEBUG_TRACE (DEBUG::LTC, "flywheel timeout\n");
reset();
- engine_dll_initstate = 0;
speed = 0;
pos = session.transport_frame();
return true;
}
- if (last_timestamp != 0 && ltc_speed != 0 && ((ltc_transport_pos < 0) || (labs(current_delta) > 10 * session.frame_rate()))) {
- DEBUG_TRACE (DEBUG::LTC, string_compose ("LTC large drift. %1\n", current_delta));
- // XXX only re-init engine DLL ?
+ /* 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;
+ }
+
+ /* 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 */
+ }
+
+ pos = last_ltc_frame + rint(elapsed);
+ speed = speed_flt;
+ current_delta = (pos - sess_pos);
+
+ if (((pos < 0) || (labs(current_delta) > 2 * session.frame_rate()))) {
+ DEBUG_TRACE (DEBUG::LTC, string_compose ("LTC large drift: %1\n", current_delta));
reset();
- engine_dll_initstate = 0;
speed = 0;
pos = session.transport_frame();
return true;
}
+ 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));
+
+ /* provide a .1% deadzone to lock the speed */
+ if (fabs(speed - 1.0) <= 0.001) {
+ speed = 1.0;
+ }
+
return true;
}
else if (timecode.rate == 25 && !timecode.drop)
return timecode_25;
else if (rint(timecode.rate * 100) == 2997 && !timecode.drop)
- return timecode_2997;
+ return (Config->get_timecode_source_2997() ? timecode_2997000 : timecode_2997);
else if (rint(timecode.rate * 100) == 2997 && timecode.drop)
- return timecode_2997drop;
+ return (Config->get_timecode_source_2997() ? 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
else if (timecode.rate == 30 && !timecode.drop)
std::string
LTC_Slave::approximate_current_delta() const
{
- char delta[24];
- if (last_timestamp == 0 || frames_in_sequence < 2) {
- snprintf(delta, sizeof(delta), "---");
+ 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), "flywheel");
+ snprintf(delta, sizeof(delta), _("flywheel"));
} else {
- // TODO if current_delta > 1 frame -> display timecode.
- // delta >0 if A3's transport is _behind_ LTC
- snprintf(delta, sizeof(delta), "%+4" PRIi64 " sm", current_delta);
+ snprintf(delta, sizeof(delta), "\u0394<span foreground=\"green\" face=\"monospace\" >%s%s%" PRIi64 "</span>sm",
+ LEADINGZERO(llabs(current_delta)), PLUSMINUS(-current_delta), llabs(current_delta));
}
return std::string(delta);
}
projects / ardour.git / blobdiff