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continue with MTC debugging

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git-svn-id: svn://localhost/ardour2/branches/3.0@6235 d708f5d6-7413-0410-9779-e7cbd77b26cf
This commit is contained in:
Paul Davis 2009-12-01 02:04:10 +00:00
parent 929f9a101a
commit 1614402e50
2 changed files with 42 additions and 30 deletions
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1
libs/ardour/ardour/slave.h
View file

@ -245,6 +245,7 @@ class MTC_Slave : public Slave, public sigc::trackable {
void update_mtc_time (const MIDI::byte *, bool); void update_mtc_time (const MIDI::byte *, bool);
void update_mtc_status (MIDI::Parser::MTC_Status); void update_mtc_status (MIDI::Parser::MTC_Status);
void read_current (SafeTime *) const; void read_current (SafeTime *) const;
double compute_apparent_speed (nframes64_t);
}; };
class MIDIClock_Slave : public Slave, public sigc::trackable { class MIDIClock_Slave : public Slave, public sigc::trackable {

71
libs/ardour/mtc_slave.cc
View file

@ -77,10 +77,13 @@ MTC_Slave::update_mtc_qtr (Parser& /*p*/)
qtr = (long) (session.frames_per_timecode_frame() / 4); qtr = (long) (session.frames_per_timecode_frame() / 4);
mtc_frame += qtr; mtc_frame += qtr;
double speed = compute_apparent_speed (now);
current.guard1++; current.guard1++;
current.position = mtc_frame; current.position = mtc_frame;
current.timestamp = now; current.timestamp = now;
current.speed = speed;
current.guard2++; current.guard2++;
last_inbound_frame = now; last_inbound_frame = now;
@ -146,7 +149,6 @@ MTC_Slave::update_mtc_time (const byte *msg, bool was_full)
} else { } else {
double speed;
/* We received the last quarter frame 7 quarter frames (1.75 mtc /* We received the last quarter frame 7 quarter frames (1.75 mtc
frames) after the instance when the contents of the mtc quarter frames) after the instance when the contents of the mtc quarter
@ -156,47 +158,56 @@ MTC_Slave::update_mtc_time (const byte *msg, bool was_full)
*/ */
mtc_frame += (long) (1.75 * session.frames_per_timecode_frame()) + session.worst_output_latency(); mtc_frame += (long) (1.75 * session.frames_per_timecode_frame()) + session.worst_output_latency();
if (current.timestamp != 0) { double speed = compute_apparent_speed (now);
speed = (double) ((mtc_frame - current.position) / (double) (now - current.timestamp));
DEBUG_TRACE (DEBUG::MTC, string_compose ("instantaneous speed = %1 from %2 - %3 / %4 - %5\n",
speed, mtc_frame, current.position, now, current.timestamp));
accumulator[accumulator_index++] = speed;
if (accumulator_index >= accumulator_size) {
have_first_accumulated_speed = true;
accumulator_index = 0;
}
if (have_first_accumulated_speed) {
double total = 0;
for (int32_t i = 0; i < accumulator_size; ++i) {
total += accumulator[i];
}
speed = total / accumulator_size;
DEBUG_TRACE (DEBUG::MTC, string_compose ("speed smoothed to %1\n", speed));
}
} else {
speed = 0;
}
current.guard1++; current.guard1++;
current.position = mtc_frame; current.position = mtc_frame;
current.timestamp = now; current.timestamp = now;
current.speed = speed; current.speed = speed;
current.guard2++; current.guard2++;
DEBUG_TRACE (DEBUG::MTC, string_compose ("stored TC frame = %1 @ %2, sp = %3\n", mtc_frame, now, speed)); DEBUG_TRACE (DEBUG::MTC, string_compose ("stored TC frame = %1 @ %2, sp = %3\n", mtc_frame, now, speed));
} }
last_inbound_frame = now; last_inbound_frame = now;
} }
double
MTC_Slave::compute_apparent_speed (nframes64_t now)
{
if (current.timestamp != 0) {
double speed = (double) ((mtc_frame - current.position) / (double) (now - current.timestamp));
DEBUG_TRACE (DEBUG::MTC, string_compose ("instantaneous speed = %1 from %2 - %3 / %4 - %5\n",
speed, mtc_frame, current.position, now, current.timestamp));
accumulator[accumulator_index++] = speed;
if (accumulator_index >= accumulator_size) {
have_first_accumulated_speed = true;
accumulator_index = 0;
}
if (have_first_accumulated_speed) {
double total = 0;
for (int32_t i = 0; i < accumulator_size; ++i) {
total += accumulator[i];
}
speed = total / accumulator_size;
DEBUG_TRACE (DEBUG::MTC, string_compose ("speed smoothed to %1\n", speed));
}
return speed;
} else {
return 0;
}
}
void void
MTC_Slave::handle_locate (const MIDI::byte* mmc_tc) MTC_Slave::handle_locate (const MIDI::byte* mmc_tc)
{ {