Robin Gareus
a9abe3b1e1
provide a way to convert any TimecodeFormat to float frame-rate, not only the currently active timecode_foramt. git-svn-id: svn://localhost/ardour2/branches/3.0@13249 d708f5d6-7413-0410-9779-e7cbd77b26cf
536 lines
10 KiB
C++
536 lines
10 KiB
C++
/*
|
|
Copyright (C) 2006-2010 Paul Davis
|
|
|
|
This program is free software; you can redistribute it and/or modify it
|
|
under the terms of the GNU Lesser General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or (at your
|
|
option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful, but WITHOUT
|
|
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
|
|
License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public License
|
|
along with this program; if not, write to the Free Software Foundation,
|
|
Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
|
|
#define Timecode_IS_AROUND_ZERO(sm) (!(sm).frames && !(sm).seconds && !(sm).minutes && !(sm).hours)
|
|
#define Timecode_IS_ZERO(sm) (!(sm).frames && !(sm).seconds && !(sm).minutes && !(sm).hours && !(sm.subframes))
|
|
|
|
#include <math.h>
|
|
|
|
#include "timecode/time.h"
|
|
|
|
namespace Timecode {
|
|
|
|
float Time::default_rate = 30.0;
|
|
|
|
|
|
/** Increment @a timecode by exactly one frame (keep subframes value).
|
|
* Realtime safe.
|
|
* @return true if seconds wrap.
|
|
*/
|
|
Wrap
|
|
increment (Time& timecode, uint32_t subframes_per_frame)
|
|
{
|
|
Wrap wrap = NONE;
|
|
|
|
if (timecode.negative) {
|
|
if (Timecode_IS_AROUND_ZERO (timecode) && timecode.subframes) {
|
|
// We have a zero transition involving only subframes
|
|
timecode.subframes = subframes_per_frame - timecode.subframes;
|
|
timecode.negative = false;
|
|
return SECONDS;
|
|
}
|
|
|
|
timecode.negative = false;
|
|
wrap = decrement (timecode, subframes_per_frame);
|
|
if (!Timecode_IS_ZERO (timecode)) {
|
|
timecode.negative = true;
|
|
}
|
|
return wrap;
|
|
}
|
|
|
|
switch ((int)ceil (timecode.rate)) {
|
|
case 24:
|
|
if (timecode.frames == 23) {
|
|
timecode.frames = 0;
|
|
wrap = SECONDS;
|
|
}
|
|
break;
|
|
case 25:
|
|
if (timecode.frames == 24) {
|
|
timecode.frames = 0;
|
|
wrap = SECONDS;
|
|
}
|
|
break;
|
|
case 30:
|
|
if (timecode.drop) {
|
|
if (timecode.frames == 29) {
|
|
if (((timecode.minutes + 1) % 10) && (timecode.seconds == 59)) {
|
|
timecode.frames = 2;
|
|
}
|
|
else {
|
|
timecode.frames = 0;
|
|
}
|
|
wrap = SECONDS;
|
|
}
|
|
} else {
|
|
|
|
if (timecode.frames == 29) {
|
|
timecode.frames = 0;
|
|
wrap = SECONDS;
|
|
}
|
|
}
|
|
break;
|
|
case 60:
|
|
if (timecode.frames == 59) {
|
|
timecode.frames = 0;
|
|
wrap = SECONDS;
|
|
}
|
|
break;
|
|
}
|
|
|
|
if (wrap == SECONDS) {
|
|
if (timecode.seconds == 59) {
|
|
timecode.seconds = 0;
|
|
wrap = MINUTES;
|
|
if (timecode.minutes == 59) {
|
|
timecode.minutes = 0;
|
|
wrap = HOURS;
|
|
timecode.hours++;
|
|
} else {
|
|
timecode.minutes++;
|
|
}
|
|
} else {
|
|
timecode.seconds++;
|
|
}
|
|
} else {
|
|
timecode.frames++;
|
|
}
|
|
|
|
return wrap;
|
|
}
|
|
|
|
|
|
/** Decrement @a timecode by exactly one frame (keep subframes value)
|
|
* Realtime safe.
|
|
* @return true if seconds wrap. */
|
|
Wrap
|
|
decrement (Time& timecode, uint32_t subframes_per_frame)
|
|
{
|
|
Wrap wrap = NONE;
|
|
|
|
if (timecode.negative || Timecode_IS_ZERO (timecode)) {
|
|
timecode.negative = false;
|
|
wrap = increment (timecode, subframes_per_frame);
|
|
timecode.negative = true;
|
|
return wrap;
|
|
} else if (Timecode_IS_AROUND_ZERO (timecode) && timecode.subframes) {
|
|
// We have a zero transition involving only subframes
|
|
timecode.subframes = subframes_per_frame - timecode.subframes;
|
|
timecode.negative = true;
|
|
return SECONDS;
|
|
}
|
|
|
|
switch ((int)ceil (timecode.rate)) {
|
|
case 24:
|
|
if (timecode.frames == 0) {
|
|
timecode.frames = 23;
|
|
wrap = SECONDS;
|
|
}
|
|
break;
|
|
case 25:
|
|
if (timecode.frames == 0) {
|
|
timecode.frames = 24;
|
|
wrap = SECONDS;
|
|
}
|
|
break;
|
|
case 30:
|
|
if (timecode.drop) {
|
|
if ((timecode.minutes % 10) && (timecode.seconds == 0)) {
|
|
if (timecode.frames <= 2) {
|
|
timecode.frames = 29;
|
|
wrap = SECONDS;
|
|
}
|
|
} else if (timecode.frames == 0) {
|
|
timecode.frames = 29;
|
|
wrap = SECONDS;
|
|
}
|
|
|
|
} else {
|
|
if (timecode.frames == 0) {
|
|
timecode.frames = 29;
|
|
wrap = SECONDS;
|
|
}
|
|
}
|
|
break;
|
|
case 60:
|
|
if (timecode.frames == 0) {
|
|
timecode.frames = 59;
|
|
wrap = SECONDS;
|
|
}
|
|
break;
|
|
}
|
|
|
|
if (wrap == SECONDS) {
|
|
if (timecode.seconds == 0) {
|
|
timecode.seconds = 59;
|
|
wrap = MINUTES;
|
|
if (timecode.minutes == 0) {
|
|
timecode.minutes = 59;
|
|
wrap = HOURS;
|
|
timecode.hours--;
|
|
}
|
|
else {
|
|
timecode.minutes--;
|
|
}
|
|
} else {
|
|
timecode.seconds--;
|
|
}
|
|
} else {
|
|
timecode.frames--;
|
|
}
|
|
|
|
if (Timecode_IS_ZERO (timecode)) {
|
|
timecode.negative = false;
|
|
}
|
|
|
|
return wrap;
|
|
}
|
|
|
|
|
|
/** Go to lowest absolute subframe value in this frame (set to 0 :-)) */
|
|
void
|
|
frames_floor (Time& timecode)
|
|
{
|
|
timecode.subframes = 0;
|
|
if (Timecode_IS_ZERO (timecode)) {
|
|
timecode.negative = false;
|
|
}
|
|
}
|
|
|
|
|
|
/** Increment @a timecode by one subframe */
|
|
Wrap
|
|
increment_subframes (Time& timecode, uint32_t subframes_per_frame)
|
|
{
|
|
Wrap wrap = NONE;
|
|
|
|
if (timecode.negative) {
|
|
timecode.negative = false;
|
|
wrap = decrement_subframes (timecode, subframes_per_frame);
|
|
if (!Timecode_IS_ZERO (timecode)) {
|
|
timecode.negative = true;
|
|
}
|
|
return wrap;
|
|
}
|
|
|
|
timecode.subframes++;
|
|
if (timecode.subframes >= subframes_per_frame) {
|
|
timecode.subframes = 0;
|
|
increment (timecode, subframes_per_frame);
|
|
return FRAMES;
|
|
}
|
|
return NONE;
|
|
}
|
|
|
|
|
|
/** Decrement @a timecode by one subframe */
|
|
Wrap
|
|
decrement_subframes (Time& timecode, uint32_t subframes_per_frame)
|
|
{
|
|
Wrap wrap = NONE;
|
|
|
|
if (timecode.negative) {
|
|
timecode.negative = false;
|
|
wrap = increment_subframes (timecode, subframes_per_frame);
|
|
timecode.negative = true;
|
|
return wrap;
|
|
}
|
|
|
|
if (timecode.subframes <= 0) {
|
|
timecode.subframes = 0;
|
|
if (Timecode_IS_ZERO (timecode)) {
|
|
timecode.negative = true;
|
|
timecode.subframes = 1;
|
|
return FRAMES;
|
|
} else {
|
|
decrement (timecode, subframes_per_frame);
|
|
timecode.subframes = 79;
|
|
return FRAMES;
|
|
}
|
|
} else {
|
|
timecode.subframes--;
|
|
if (Timecode_IS_ZERO (timecode)) {
|
|
timecode.negative = false;
|
|
}
|
|
return NONE;
|
|
}
|
|
}
|
|
|
|
|
|
/** Go to next whole second (frames == 0 or frames == 2) */
|
|
Wrap
|
|
increment_seconds (Time& timecode, uint32_t subframes_per_frame)
|
|
{
|
|
Wrap wrap = NONE;
|
|
|
|
// Clear subframes
|
|
frames_floor (timecode);
|
|
|
|
if (timecode.negative) {
|
|
// Wrap second if on second boundary
|
|
wrap = increment (timecode, subframes_per_frame);
|
|
// Go to lowest absolute frame value
|
|
seconds_floor (timecode);
|
|
if (Timecode_IS_ZERO (timecode)) {
|
|
timecode.negative = false;
|
|
}
|
|
} else {
|
|
// Go to highest possible frame in this second
|
|
switch ((int)ceil (timecode.rate)) {
|
|
case 24:
|
|
timecode.frames = 23;
|
|
break;
|
|
case 25:
|
|
timecode.frames = 24;
|
|
break;
|
|
case 30:
|
|
timecode.frames = 29;
|
|
break;
|
|
case 60:
|
|
timecode.frames = 59;
|
|
break;
|
|
}
|
|
|
|
// Increment by one frame
|
|
wrap = increment (timecode, subframes_per_frame);
|
|
}
|
|
|
|
return wrap;
|
|
}
|
|
|
|
|
|
/** Go to lowest (absolute) frame value in this second
|
|
* Doesn't care about positive/negative */
|
|
void
|
|
seconds_floor (Time& timecode)
|
|
{
|
|
// Clear subframes
|
|
frames_floor (timecode);
|
|
|
|
// Go to lowest possible frame in this second
|
|
switch ((int)ceil (timecode.rate)) {
|
|
case 24:
|
|
case 25:
|
|
case 30:
|
|
case 60:
|
|
if (!(timecode.drop)) {
|
|
timecode.frames = 0;
|
|
} else {
|
|
if ((timecode.minutes % 10) && (timecode.seconds == 0)) {
|
|
timecode.frames = 2;
|
|
} else {
|
|
timecode.frames = 0;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
|
|
if (Timecode_IS_ZERO (timecode)) {
|
|
timecode.negative = false;
|
|
}
|
|
}
|
|
|
|
|
|
/** Go to next whole minute (seconds == 0, frames == 0 or frames == 2) */
|
|
Wrap
|
|
increment_minutes (Time& timecode, uint32_t subframes_per_frame)
|
|
{
|
|
Wrap wrap = NONE;
|
|
|
|
// Clear subframes
|
|
frames_floor (timecode);
|
|
|
|
if (timecode.negative) {
|
|
// Wrap if on minute boundary
|
|
wrap = increment_seconds (timecode, subframes_per_frame);
|
|
// Go to lowest possible value in this minute
|
|
minutes_floor (timecode);
|
|
} else {
|
|
// Go to highest possible second
|
|
timecode.seconds = 59;
|
|
// Wrap minute by incrementing second
|
|
wrap = increment_seconds (timecode, subframes_per_frame);
|
|
}
|
|
|
|
return wrap;
|
|
}
|
|
|
|
|
|
/** Go to lowest absolute value in this minute */
|
|
void
|
|
minutes_floor (Time& timecode)
|
|
{
|
|
// Go to lowest possible second
|
|
timecode.seconds = 0;
|
|
// Go to lowest possible frame
|
|
seconds_floor (timecode);
|
|
|
|
if (Timecode_IS_ZERO (timecode)) {
|
|
timecode.negative = false;
|
|
}
|
|
}
|
|
|
|
|
|
/** Go to next whole hour (minute = 0, second = 0, frame = 0) */
|
|
Wrap
|
|
increment_hours (Time& timecode, uint32_t subframes_per_frame)
|
|
{
|
|
Wrap wrap = NONE;
|
|
|
|
// Clear subframes
|
|
frames_floor (timecode);
|
|
|
|
if (timecode.negative) {
|
|
// Wrap if on hour boundary
|
|
wrap = increment_minutes (timecode, subframes_per_frame);
|
|
// Go to lowest possible value in this hour
|
|
hours_floor(timecode);
|
|
} else {
|
|
timecode.minutes = 59;
|
|
wrap = increment_minutes (timecode, subframes_per_frame);
|
|
}
|
|
|
|
return wrap;
|
|
}
|
|
|
|
|
|
/** Go to lowest absolute value in this hour */
|
|
void
|
|
hours_floor(Time& timecode)
|
|
{
|
|
timecode.minutes = 0;
|
|
timecode.seconds = 0;
|
|
timecode.frames = 0;
|
|
timecode.subframes = 0;
|
|
|
|
if (Timecode_IS_ZERO (timecode)) {
|
|
timecode.negative = false;
|
|
}
|
|
}
|
|
|
|
float
|
|
timecode_to_frames_per_second(TimecodeFormat t)
|
|
{
|
|
switch (t) {
|
|
case timecode_23976:
|
|
return (24000.0/1001.0); //23.976;
|
|
|
|
break;
|
|
case timecode_24:
|
|
return 24;
|
|
|
|
break;
|
|
case timecode_24976:
|
|
return (25000.0/1001.0); //24.976;
|
|
|
|
break;
|
|
case timecode_25:
|
|
return 25;
|
|
|
|
break;
|
|
case timecode_2997:
|
|
return 29.97;
|
|
|
|
break;
|
|
case timecode_2997drop:
|
|
return (30000.0/1001.0); //29.97;
|
|
|
|
break;
|
|
case timecode_30:
|
|
return 30;
|
|
|
|
break;
|
|
case timecode_30drop:
|
|
return 30;
|
|
|
|
break;
|
|
case timecode_5994:
|
|
return (60000.0/1001.0); //59.94;
|
|
|
|
break;
|
|
case timecode_60:
|
|
return 60;
|
|
|
|
break;
|
|
default:
|
|
//std::cerr << "Editor received unexpected timecode type" << std::endl;
|
|
break;
|
|
}
|
|
return 30.0;
|
|
}
|
|
|
|
bool
|
|
timecode_has_drop_frames(TimecodeFormat t)
|
|
{
|
|
switch (t) {
|
|
case timecode_23976:
|
|
return false;
|
|
|
|
break;
|
|
case timecode_24:
|
|
return false;
|
|
|
|
break;
|
|
case timecode_24976:
|
|
return false;
|
|
|
|
break;
|
|
case timecode_25:
|
|
return false;
|
|
|
|
break;
|
|
case timecode_2997:
|
|
return false;
|
|
|
|
break;
|
|
case timecode_2997drop:
|
|
return true;
|
|
|
|
break;
|
|
case timecode_30:
|
|
return false;
|
|
|
|
break;
|
|
case timecode_30drop:
|
|
return true;
|
|
|
|
break;
|
|
case timecode_5994:
|
|
return false;
|
|
|
|
break;
|
|
case timecode_60:
|
|
return false;
|
|
|
|
break;
|
|
default:
|
|
//error << "Editor received unexpected timecode type" << endmsg;
|
|
break;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
} // namespace Timecode
|
|
|
|
std::ostream&
|
|
operator<<(std::ostream& ostr, const Timecode::Time& t)
|
|
{
|
|
return t.print (ostr);
|
|
}
|