854 lines
21 KiB
C++
854 lines
21 KiB
C++
/*
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* Copyright (C) 2017 Paul Davis <paul@linuxaudiosystems.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#define Timecode_IS_AROUND_ZERO(sm) (!(sm).frames && !(sm).seconds && !(sm).minutes && !(sm).hours)
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#define Timecode_IS_ZERO(sm) (!(sm).frames && !(sm).seconds && !(sm).minutes && !(sm).hours && !(sm.subframes))
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#include <math.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "temporal/time.h"
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namespace Timecode {
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double Time::default_rate = 30.0;
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/** Increment @a timecode by exactly one sample (keep subframes value).
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* Realtime safe.
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* @return true if seconds wrap.
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*/
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Wrap
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increment (Time& timecode, uint32_t subframes_per_frame)
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{
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Wrap wrap = NONE;
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if (timecode.negative) {
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if (Timecode_IS_AROUND_ZERO (timecode) && timecode.subframes) {
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// We have a zero transition involving only subframes
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timecode.subframes = subframes_per_frame - timecode.subframes;
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timecode.negative = false;
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return SECONDS;
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}
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timecode.negative = false;
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wrap = decrement (timecode, subframes_per_frame);
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if (!Timecode_IS_ZERO (timecode)) {
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timecode.negative = true;
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}
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return wrap;
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}
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switch ((int)ceil (timecode.rate)) {
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case 24:
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if (timecode.frames == 23) {
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timecode.frames = 0;
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wrap = SECONDS;
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}
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break;
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case 25:
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if (timecode.frames == 24) {
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timecode.frames = 0;
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wrap = SECONDS;
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}
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break;
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case 30:
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if (timecode.drop) {
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if (timecode.frames == 29) {
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if (((timecode.minutes + 1) % 10) && (timecode.seconds == 59)) {
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timecode.frames = 2;
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}
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else {
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timecode.frames = 0;
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}
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wrap = SECONDS;
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}
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} else {
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if (timecode.frames == 29) {
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timecode.frames = 0;
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wrap = SECONDS;
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}
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}
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break;
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case 60:
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if (timecode.frames == 59) {
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timecode.frames = 0;
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wrap = SECONDS;
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}
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break;
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}
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if (wrap == SECONDS) {
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if (timecode.seconds == 59) {
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timecode.seconds = 0;
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wrap = MINUTES;
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if (timecode.minutes == 59) {
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timecode.minutes = 0;
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wrap = HOURS;
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timecode.hours++;
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} else {
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timecode.minutes++;
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}
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} else {
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timecode.seconds++;
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}
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} else {
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timecode.frames++;
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}
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return wrap;
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}
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/** Decrement @a timecode by exactly one sample (keep subframes value)
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* Realtime safe.
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* @return true if seconds wrap. */
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Wrap
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decrement (Time& timecode, uint32_t subframes_per_frame)
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{
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Wrap wrap = NONE;
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if (timecode.negative || Timecode_IS_ZERO (timecode)) {
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timecode.negative = false;
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wrap = increment (timecode, subframes_per_frame);
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timecode.negative = true;
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return wrap;
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} else if (Timecode_IS_AROUND_ZERO (timecode) && timecode.subframes) {
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// We have a zero transition involving only subframes
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timecode.subframes = subframes_per_frame - timecode.subframes;
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timecode.negative = true;
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return SECONDS;
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}
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switch ((int)ceil (timecode.rate)) {
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case 24:
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if (timecode.frames == 0) {
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timecode.frames = 23;
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wrap = SECONDS;
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}
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break;
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case 25:
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if (timecode.frames == 0) {
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timecode.frames = 24;
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wrap = SECONDS;
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}
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break;
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case 30:
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if (timecode.drop) {
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if ((timecode.minutes % 10) && (timecode.seconds == 0)) {
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if (timecode.frames <= 2) {
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timecode.frames = 29;
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wrap = SECONDS;
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}
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} else if (timecode.frames == 0) {
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timecode.frames = 29;
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wrap = SECONDS;
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}
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} else {
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if (timecode.frames == 0) {
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timecode.frames = 29;
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wrap = SECONDS;
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}
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}
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break;
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case 60:
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if (timecode.frames == 0) {
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timecode.frames = 59;
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wrap = SECONDS;
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}
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break;
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}
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if (wrap == SECONDS) {
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if (timecode.seconds == 0) {
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timecode.seconds = 59;
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wrap = MINUTES;
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if (timecode.minutes == 0) {
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timecode.minutes = 59;
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wrap = HOURS;
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timecode.hours--;
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}
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else {
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timecode.minutes--;
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}
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} else {
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timecode.seconds--;
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}
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} else {
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timecode.frames--;
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}
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if (Timecode_IS_ZERO (timecode)) {
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timecode.negative = false;
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}
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return wrap;
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}
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/** Go to lowest absolute subframe value in this sample (set to 0 :-)) */
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void
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frames_floot (Time& timecode)
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{
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timecode.subframes = 0;
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if (Timecode_IS_ZERO (timecode)) {
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timecode.negative = false;
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}
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}
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/** Increment @a timecode by one subframe */
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Wrap
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increment_subframes (Time& timecode, uint32_t subframes_per_frame)
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{
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Wrap wrap = NONE;
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if (timecode.negative) {
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timecode.negative = false;
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wrap = decrement_subframes (timecode, subframes_per_frame);
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if (!Timecode_IS_ZERO (timecode)) {
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timecode.negative = true;
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}
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return wrap;
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}
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timecode.subframes++;
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if (timecode.subframes >= subframes_per_frame) {
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timecode.subframes = 0;
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increment (timecode, subframes_per_frame);
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return FRAMES;
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}
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return NONE;
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}
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/** Decrement @a timecode by one subframe */
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Wrap
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decrement_subframes (Time& timecode, uint32_t subframes_per_frame)
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{
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Wrap wrap = NONE;
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if (timecode.negative) {
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timecode.negative = false;
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wrap = increment_subframes (timecode, subframes_per_frame);
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timecode.negative = true;
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return wrap;
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}
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if (timecode.subframes <= 0) {
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timecode.subframes = 0;
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if (Timecode_IS_ZERO (timecode)) {
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timecode.negative = true;
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timecode.subframes = 1;
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return FRAMES;
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} else {
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decrement (timecode, subframes_per_frame);
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timecode.subframes = 79;
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return FRAMES;
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}
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} else {
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timecode.subframes--;
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if (Timecode_IS_ZERO (timecode)) {
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timecode.negative = false;
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}
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return NONE;
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}
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}
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/** Go to next whole second (frames == 0 or frames == 2) */
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Wrap
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increment_seconds (Time& timecode, uint32_t subframes_per_frame)
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{
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Wrap wrap = NONE;
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// Clear subframes
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frames_floot (timecode);
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if (timecode.negative) {
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// Wrap second if on second boundary
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wrap = increment (timecode, subframes_per_frame);
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// Go to lowest absolute frame value
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seconds_floor (timecode);
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if (Timecode_IS_ZERO (timecode)) {
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timecode.negative = false;
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}
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} else {
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// Go to highest possible frame in this second
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switch ((int)ceil (timecode.rate)) {
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case 24:
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timecode.frames = 23;
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break;
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case 25:
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timecode.frames = 24;
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break;
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case 30:
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timecode.frames = 29;
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break;
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case 60:
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timecode.frames = 59;
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break;
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}
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// Increment by one frame
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wrap = increment (timecode, subframes_per_frame);
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}
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return wrap;
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}
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/** Go to lowest (absolute) frame value in this second
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* Doesn't care about positive/negative */
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void
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seconds_floor (Time& timecode)
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{
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// Clear subframes
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frames_floot (timecode);
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// Go to lowest possible frame in this second
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switch ((int)ceil (timecode.rate)) {
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case 24:
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case 25:
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case 30:
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case 60:
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if (!(timecode.drop)) {
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timecode.frames = 0;
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} else {
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if ((timecode.minutes % 10) && (timecode.seconds == 0)) {
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timecode.frames = 2;
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} else {
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timecode.frames = 0;
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}
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}
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break;
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}
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if (Timecode_IS_ZERO (timecode)) {
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timecode.negative = false;
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}
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}
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/** Go to next whole minute (seconds == 0, frames == 0 or frames == 2) */
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Wrap
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increment_minutes (Time& timecode, uint32_t subframes_per_frame)
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{
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Wrap wrap = NONE;
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// Clear subframes
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frames_floot (timecode);
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if (timecode.negative) {
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// Wrap if on minute boundary
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wrap = increment_seconds (timecode, subframes_per_frame);
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// Go to lowest possible value in this minute
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minutes_floor (timecode);
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} else {
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// Go to highest possible second
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timecode.seconds = 59;
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// Wrap minute by incrementing second
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wrap = increment_seconds (timecode, subframes_per_frame);
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}
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return wrap;
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}
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/** Go to lowest absolute value in this minute */
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void
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minutes_floor (Time& timecode)
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{
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// Go to lowest possible second
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timecode.seconds = 0;
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// Go to lowest possible frame
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seconds_floor (timecode);
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if (Timecode_IS_ZERO (timecode)) {
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timecode.negative = false;
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}
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}
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/** Go to next whole hour (minute = 0, second = 0, frame = 0) */
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Wrap
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increment_hours (Time& timecode, uint32_t subframes_per_frame)
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{
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Wrap wrap = NONE;
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// Clear subframes
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frames_floot (timecode);
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if (timecode.negative) {
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// Wrap if on hour boundary
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wrap = increment_minutes (timecode, subframes_per_frame);
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// Go to lowest possible value in this hour
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hours_floor(timecode);
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} else {
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timecode.minutes = 59;
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wrap = increment_minutes (timecode, subframes_per_frame);
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}
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return wrap;
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}
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/** Go to lowest absolute value in this hour */
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void
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hours_floor(Time& timecode)
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{
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timecode.minutes = 0;
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timecode.seconds = 0;
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timecode.frames = 0;
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timecode.subframes = 0;
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if (Timecode_IS_ZERO (timecode)) {
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timecode.negative = false;
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}
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}
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double
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timecode_to_frames_per_second(TimecodeFormat t)
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{
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switch (t) {
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case timecode_23976:
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return (24000.0/1001.0); //23.976;
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break;
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case timecode_24:
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return 24;
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break;
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case timecode_24976:
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return (25000.0/1001.0); //24.976;
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break;
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case timecode_25:
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return 25;
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break;
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case timecode_2997:
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return (30000.0/1001.0); //29.97;
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break;
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case timecode_2997drop:
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return (30000.0/1001.0); //29.97;
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break;
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case timecode_2997000:
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return 29.97;
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break;
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case timecode_2997000drop:
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return 29.97;
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break;
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case timecode_30:
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return 30;
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break;
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case timecode_30drop:
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return 30;
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break;
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case timecode_5994:
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return (60000.0/1001.0); //59.94;
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break;
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case timecode_60:
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return 60;
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break;
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default:
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//std::cerr << "Editor received unexpected timecode type" << std::endl;
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break;
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}
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return 30.0;
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}
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bool
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timecode_has_drop_frames(TimecodeFormat t)
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{
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switch (t) {
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case timecode_23976:
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return false;
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break;
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case timecode_24:
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return false;
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break;
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case timecode_24976:
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return false;
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break;
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case timecode_25:
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return false;
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break;
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case timecode_2997:
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return false;
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break;
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case timecode_2997drop:
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return true;
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break;
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case timecode_2997000:
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return false;
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break;
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case timecode_2997000drop:
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return true;
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break;
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case timecode_30:
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return false;
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break;
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case timecode_30drop:
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return true;
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break;
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case timecode_5994:
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return false;
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break;
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case timecode_60:
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return false;
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break;
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default:
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//error << "Editor received unexpected timecode type" << endmsg;
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break;
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}
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return false;
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}
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std::string
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timecode_format_name (TimecodeFormat const t)
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{
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switch (t) {
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case timecode_23976:
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return "23.98";
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break;
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case timecode_24:
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return "24";
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break;
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case timecode_24976:
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return "24.98";
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break;
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case timecode_25:
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return "25";
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break;
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case timecode_2997000:
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case timecode_2997:
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return "29.97";
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break;
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case timecode_2997000drop:
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case timecode_2997drop:
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return "29.97 drop";
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break;
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case timecode_30:
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return "30";
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break;
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case timecode_30drop:
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return "30 drop";
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break;
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case timecode_5994:
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return "59.94";
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break;
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case timecode_60:
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return "60";
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break;
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default:
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break;
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}
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return "??";
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}
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std::string timecode_format_time (Timecode::Time TC)
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{
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char buf[32];
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if (TC.negative) {
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snprintf (buf, sizeof (buf), "-%02" PRIu32 ":%02" PRIu32 ":%02" PRIu32 "%c%02" PRIu32,
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TC.hours, TC.minutes, TC.seconds, TC.drop ? ';' : ':', TC.frames);
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} else {
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snprintf (buf, sizeof (buf), " %02" PRIu32 ":%02" PRIu32 ":%02" PRIu32 "%c%02" PRIu32,
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TC.hours, TC.minutes, TC.seconds, TC.drop ? ';' : ':', TC.frames);
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}
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return std::string(buf);
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}
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std::string timecode_format_sampletime (
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int64_t sample,
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double sample_sample_rate,
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double timecode_frames_per_second, bool timecode_drop_frames)
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{
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Time t;
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sample_to_timecode(
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sample, t, false, false,
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timecode_frames_per_second, timecode_drop_frames,
|
|
sample_sample_rate,
|
|
80, false, 0);
|
|
return timecode_format_time(t);
|
|
}
|
|
|
|
bool parse_timecode_format(std::string tc, Timecode::Time &TC) {
|
|
char negative[2];
|
|
char ignored[2];
|
|
TC.subframes = 0;
|
|
if (sscanf (tc.c_str(), "%[- ]%" PRId32 ":%" PRId32 ":%" PRId32 "%[:;]%" PRId32,
|
|
negative, &TC.hours, &TC.minutes, &TC.seconds, ignored, &TC.frames) != 6) {
|
|
TC.hours = TC.minutes = TC.seconds = TC.frames = 0;
|
|
TC.negative = false;
|
|
return false;
|
|
}
|
|
if (negative[0]=='-') {
|
|
TC.negative = true;
|
|
} else {
|
|
TC.negative = false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
void
|
|
timecode_to_sample(
|
|
Timecode::Time const& timecode, int64_t& sample,
|
|
bool use_offset, bool use_subframes,
|
|
/* Note - framerate info is taken from Timecode::Time& */
|
|
double sample_sample_rate /**< may include pull up/down */,
|
|
uint32_t subframes_per_frame,
|
|
/* optional offset - can be improved: function pointer to lazily query this*/
|
|
bool offset_is_negative, int64_t offset_samples
|
|
)
|
|
{
|
|
const double samples_per_timecode_frame = (double) sample_sample_rate / (double) timecode.rate;
|
|
|
|
if (timecode.drop) {
|
|
// The drop frame format was created to better approximate the 30000/1001 = 29.97002997002997....
|
|
// framerate of NTSC color TV. The used frame rate of drop fra,e is 29.97, which drifts by about
|
|
// 0.108 frame per hour, or about 1.3 frames per 12 hours. This is not perfect, but a lot better
|
|
// than using 30 non drop, which will drift with about 1.8 frame per minute.
|
|
// Using 29.97, drop frame real time can be accurate only every 10th minute (10 minutes of 29.97 fps
|
|
// is exactly 17982 samples). One minute is 1798.2 samples, but we count 30 frames per second
|
|
// (30 * 60 = 1800). This means that at the first minute boundary (at the end of 0:0:59:29) we
|
|
// are 1.8 framess too late relative to real time. By dropping 2 frames (jumping to 0:1:0:2) we are
|
|
// approx. 0.2 frames too early. This adds up with 0.2 too early for each minute until we are 1.8
|
|
// samples too early at 0:9:0:2 (9 * 0.2 = 1.8). The 10th minute brings us 1.8 frames later again
|
|
// (at end of 0:9:59:29), which sums up to 0 (we are back to zero at 0:10:0:0 :-).
|
|
//
|
|
// In table form:
|
|
//
|
|
// Timecode value frames offset subframes offset seconds (rounded) 44100 sample (rounded)
|
|
// 0:00:00:00 0.0 0 0.000 0 (accurate)
|
|
// 0:00:59:29 1.8 144 60.027 2647177
|
|
// 0:01:00:02 -0.2 -16 60.060 2648648
|
|
// 0:01:59:29 1.6 128 120.020 5292883
|
|
// 0:02:00:02 -0.4 -32 120.053 5294354
|
|
// 0:02:59:29 1.4 112 180.013 7938588
|
|
// 0:03:00:02 -0.6 -48 180.047 7940060
|
|
// 0:03:59:29 1.2 96 240.007 10584294
|
|
// 0:04:00:02 -0.8 -64 240.040 10585766
|
|
// 0:04:59:29 1.0 80 300.000 13230000
|
|
// 0:05:00:02 -1.0 -80 300.033 13231471
|
|
// 0:05:59:29 0.8 64 359.993 15875706
|
|
// 0:06:00:02 -1.2 -96 360.027 15877177
|
|
// 0:06:59:29 0.6 48 419.987 18521411
|
|
// 0:07:00:02 -1.4 -112 420.020 18522883
|
|
// 0:07:59:29 0.4 32 478.980 21167117
|
|
// 0:08:00:02 -1.6 -128 480.013 21168589
|
|
// 0:08:59:29 0.2 16 539.973 23812823
|
|
// 0:09:00:02 -1.8 -144 540.007 23814294
|
|
// 0:09:59:29 0.0+ 0+ 599.967 26458529
|
|
// 0:10:00:00 0.0 0 600.000 26460000 (accurate)
|
|
//
|
|
// Per Sigmond <per@sigmond.no>
|
|
//
|
|
// This schma would compensate exactly for a frame-rate of 30 * 0.999. but the
|
|
// actual rate is 30000/1001 - which results in an offset of -3.6ms per hour or
|
|
// about -86ms over a 24-hour period. (SMPTE 12M-1999)
|
|
//
|
|
// Robin Gareus <robin@gareus.org>
|
|
|
|
const int64_t fps_i = ceil(timecode.rate);
|
|
int64_t totalMinutes = 60 * timecode.hours + timecode.minutes;
|
|
int64_t frameNumber = fps_i * 3600 * timecode.hours
|
|
+ fps_i * 60 * timecode.minutes
|
|
+ fps_i * timecode.seconds + timecode.frames
|
|
- 2 * (totalMinutes - totalMinutes / 10);
|
|
sample = frameNumber * sample_sample_rate / (double) timecode.rate;
|
|
} else {
|
|
/*
|
|
Non drop is easy.. just note the use of
|
|
rint(timecode.rate) * samples_per_timecode_frame
|
|
(frames per Timecode second), which is larger than
|
|
sample_rate() in the non-integer Timecode rate case.
|
|
*/
|
|
|
|
sample = (int64_t) rint(
|
|
(
|
|
((timecode.hours * 60 * 60) + (timecode.minutes * 60) + timecode.seconds)
|
|
*
|
|
(rint(timecode.rate) * samples_per_timecode_frame)
|
|
)
|
|
+ (timecode.frames * samples_per_timecode_frame)
|
|
);
|
|
}
|
|
|
|
if (use_subframes) {
|
|
sample += (int64_t) rint(((double)timecode.subframes * samples_per_timecode_frame) / (double)subframes_per_frame);
|
|
}
|
|
|
|
if (use_offset) {
|
|
if (offset_is_negative) {
|
|
if (sample >= offset_samples) {
|
|
sample -= offset_samples;
|
|
} else {
|
|
/* Prevent song-time from becoming negative */
|
|
sample = 0;
|
|
}
|
|
} else {
|
|
if (timecode.negative) {
|
|
if (sample <= offset_samples) {
|
|
sample = offset_samples - sample;
|
|
} else {
|
|
sample = 0;
|
|
}
|
|
} else {
|
|
sample += offset_samples;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
void
|
|
sample_to_timecode (
|
|
int64_t sample, Timecode::Time& timecode,
|
|
bool use_offset, bool use_subframes,
|
|
/* framerate info */
|
|
double timecode_frames_per_second,
|
|
bool timecode_drop_frames,
|
|
double sample_sample_rate/**< can include pull up/down */,
|
|
uint32_t subframes_per_frame,
|
|
/* optional offset - can be improved: function pointer to lazily query this*/
|
|
bool offset_is_negative, int64_t offset_samples
|
|
)
|
|
{
|
|
int64_t offset_sample;
|
|
|
|
if (!use_offset) {
|
|
timecode.negative = (sample < 0);
|
|
offset_sample = ::llabs(sample);
|
|
} else {
|
|
if (offset_is_negative) {
|
|
offset_sample = sample + offset_samples;
|
|
timecode.negative = false;
|
|
} else {
|
|
if (sample < offset_samples) {
|
|
offset_sample = (offset_samples - sample);
|
|
timecode.negative = true;
|
|
} else {
|
|
offset_sample = sample - offset_samples;
|
|
timecode.negative = false;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (timecode_drop_frames) {
|
|
int64_t frameNumber = floor( (double)offset_sample * timecode_frames_per_second / sample_sample_rate);
|
|
|
|
/* there are 17982 samples in 10 min @ 29.97df */
|
|
const int64_t D = frameNumber / 17982;
|
|
const int64_t M = frameNumber % 17982;
|
|
|
|
timecode.subframes = rint(subframes_per_frame
|
|
* ((double)offset_sample * timecode_frames_per_second / sample_sample_rate - (double)frameNumber));
|
|
|
|
if (timecode.subframes == subframes_per_frame) {
|
|
timecode.subframes = 0;
|
|
frameNumber++;
|
|
}
|
|
|
|
frameNumber += 18*D + 2*((M - 2) / 1798);
|
|
|
|
timecode.frames = frameNumber % 30;
|
|
timecode.seconds = (frameNumber / 30) % 60;
|
|
timecode.minutes = ((frameNumber / 30) / 60) % 60;
|
|
timecode.hours = (((frameNumber / 30) / 60) / 60);
|
|
|
|
} else {
|
|
double timecode_frames_left_exact;
|
|
double timecode_frames_fraction;
|
|
int64_t timecode_frames_left;
|
|
const double samples_per_timecode_frame = sample_sample_rate / timecode_frames_per_second;
|
|
const int64_t frames_per_hour = (int64_t)(3600. * rint(timecode_frames_per_second) * samples_per_timecode_frame);
|
|
|
|
timecode.hours = offset_sample / frames_per_hour;
|
|
|
|
// Extract whole hours. Do this to prevent rounding errors with
|
|
// high sample numbers in the calculations that follow.
|
|
timecode_frames_left_exact = (double)(offset_sample % frames_per_hour) / samples_per_timecode_frame;
|
|
timecode_frames_fraction = timecode_frames_left_exact - floor( timecode_frames_left_exact );
|
|
|
|
timecode.subframes = (int32_t) rint(timecode_frames_fraction * subframes_per_frame);
|
|
timecode_frames_left = (int64_t) floor (timecode_frames_left_exact);
|
|
|
|
if (use_subframes && timecode.subframes == subframes_per_frame) {
|
|
timecode_frames_left++;
|
|
timecode.subframes = 0;
|
|
}
|
|
|
|
timecode.minutes = timecode_frames_left / ((int32_t) lrint (timecode_frames_per_second) * 60);
|
|
timecode_frames_left = timecode_frames_left % ((int32_t) lrint (timecode_frames_per_second) * 60);
|
|
timecode.seconds = timecode_frames_left / (int32_t) lrint(timecode_frames_per_second);
|
|
timecode.frames = timecode_frames_left % (int32_t) lrint(timecode_frames_per_second);
|
|
}
|
|
|
|
if (!use_subframes) {
|
|
timecode.subframes = 0;
|
|
}
|
|
/* set frame rate and drop sample */
|
|
timecode.rate = timecode_frames_per_second;
|
|
timecode.drop = timecode_drop_frames;
|
|
}
|
|
|
|
} // namespace Timecode
|
|
|
|
std::ostream&
|
|
operator<<(std::ostream& ostr, const Timecode::Time& t)
|
|
{
|
|
return t.print (ostr);
|
|
}
|