307 lines
9.3 KiB
C++
307 lines
9.3 KiB
C++
/***
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Olive - Non-Linear Video Editor
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Copyright (C) 2020 Olive Team
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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 3 of the License, or
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(at your option) any later version.
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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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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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***/
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#include "timecodefunctions.h"
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#include <QtMath>
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#include "config/config.h"
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namespace olive {
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QString padded(int64_t arg, int padding) {
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return QStringLiteral("%1").arg(arg, padding, 10, QChar('0'));
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}
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QString Timecode::timestamp_to_timecode(const int64_t ×tamp,
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const rational& timebase,
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const Display& display,
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bool show_plus_if_positive)
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{
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if (timebase.isNull()) {
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return QStringLiteral("INVALID TIMEBASE");
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}
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double timestamp_dbl = (rational(timestamp) * timebase).toDouble();
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switch (display) {
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case kTimecodeNonDropFrame:
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case kTimecodeDropFrame:
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case kTimecodeSeconds:
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{
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QString prefix;
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if (timestamp_dbl < 0) {
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prefix = "-";
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} else if (show_plus_if_positive) {
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prefix = "+";
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}
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if (display == kTimecodeSeconds) {
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timestamp_dbl = qAbs(timestamp_dbl);
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int64_t total_seconds = qFloor(timestamp_dbl);
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int64_t hours = total_seconds / 3600;
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int64_t mins = total_seconds / 60 - hours * 60;
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int64_t secs = total_seconds - mins * 60;
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int64_t fraction = qRound64((timestamp_dbl - static_cast<double>(total_seconds)) * 1000);
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return QStringLiteral("%1%2:%3:%4.%5").arg(prefix,
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padded(hours, 2),
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padded(mins, 2),
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padded(secs, 2),
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padded(fraction, 3));
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} else {
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// Determine what symbol to separate frames (";" is used for drop frame, ":" is non-drop frame)
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QString frame_token;
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double frame_rate = timebase.flipped().toDouble();
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int rounded_frame_rate = qRound(frame_rate);
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int64_t frames, secs, mins, hours;
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int64_t f = qAbs(timestamp);
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if (display == kTimecodeDropFrame && TimebaseIsDropFrame(timebase)) {
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frame_token = ";";
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/**
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* CONVERT A FRAME NUMBER TO DROP FRAME TIMECODE
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*
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* Code by David Heidelberger, adapted from Andrew Duncan, further adapted for Olive by Olive Team
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* Given an int called framenumber and a double called framerate
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* Framerate should be 29.97, 59.94, or 23.976, otherwise the calculations will be off.
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*/
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// If frame number is greater than 24 hrs, next operation will rollover clock
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f %= (qRound(frame_rate*3600)*24);
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// Number of frames per ten minutes
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int64_t framesPer10Minutes = qRound(frame_rate * 600);
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int64_t d = f / framesPer10Minutes;
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int64_t m = f % framesPer10Minutes;
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// Number of frames to drop on the minute marks is the nearest integer to 6% of the framerate
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int64_t dropFrames = qRound(frame_rate * (2.0/30.0));
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// Number of frames per minute is the round of the framerate * 60 minus the number of dropped frames
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f += dropFrames*9*d;
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if (m > dropFrames) {
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f += dropFrames * ((m - dropFrames) / (qRound(frame_rate)*60 - dropFrames));
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}
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} else {
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frame_token = ":";
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}
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// non-drop timecode
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hours = f / (3600*rounded_frame_rate);
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mins = f / (60*rounded_frame_rate) % 60;
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secs = f / rounded_frame_rate % 60;
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frames = f % rounded_frame_rate;
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return QStringLiteral("%1%2:%3:%4%5%6").arg(prefix,
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padded(hours, 2),
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padded(mins, 2),
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padded(secs, 2),
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frame_token,
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padded(frames, 2));
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}
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}
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case kFrames:
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return QString::number(timestamp);
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case kMilliseconds:
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return QString::number(qRound(timestamp_dbl * 1000));
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}
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return QStringLiteral("INVALID TIMECODE MODE");
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}
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int64_t Timecode::timecode_to_timestamp(const QString &timecode, const rational &timebase, const Display &display, bool* ok)
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{
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double timebase_dbl = timebase.toDouble();
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if (timecode.isEmpty()) {
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goto err_fatal;
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}
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switch (display) {
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case kTimecodeNonDropFrame:
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case kTimecodeDropFrame:
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case kTimecodeSeconds:
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{
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const int kTimecodeElementCount = 4;
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QStringList timecode_split = timecode.split(QRegExp("(:)|(;)|(\\.)"));
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bool valid;
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// We only deal with HH, MM, SS, and FF. Any values after that are ignored.
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while (timecode_split.size() > kTimecodeElementCount) {
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timecode_split.removeLast();
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}
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// Convert values to integers
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QList<int64_t> timecode_numbers;
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foreach (const QString& element, timecode_split) {
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valid = true;
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timecode_numbers.append((element.isEmpty()) ? 0 : element.toLong(&valid));
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// If element cannot be converted to a number,
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if (!valid) {
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goto err_fatal;
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}
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}
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// Ensure value size is always 4
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while (timecode_numbers.size() < 4) {
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timecode_numbers.prepend(0);
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}
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double frame_rate = timebase.flipped().toDouble();
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int rounded_frame_rate = qRound(frame_rate);
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int64_t hours = timecode_numbers.at(0);
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int64_t mins = timecode_numbers.at(1);
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int64_t secs = timecode_numbers.at(2);
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int64_t frames = timecode_numbers.at(3);
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int64_t sec_count = (hours*3600 + mins*60 + secs);
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int64_t timestamp = sec_count*rounded_frame_rate + frames;
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if (display == kTimecodeDropFrame && TimebaseIsDropFrame(timebase)) {
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// Number of frames to drop on the minute marks is the nearest integer to 6% of the framerate
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int64_t dropFrames = qRound64(frame_rate * (2.0/30.0));
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// d and m need to be calculated from
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int64_t real_fr_ts = qRound64(static_cast<double>(sec_count)*frame_rate) + frames;
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int64_t framesPer10Minutes = qRound(frame_rate * 600);
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int64_t d = real_fr_ts / framesPer10Minutes;
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int64_t m = real_fr_ts % framesPer10Minutes;
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if (m > dropFrames) {
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timestamp -= dropFrames * ((m - dropFrames) / (qRound(frame_rate)*60 - dropFrames));
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}
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timestamp -= dropFrames*9*d;
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}
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if (ok) *ok = true;
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return timestamp;
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}
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case kMilliseconds:
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{
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bool valid;
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double timecode_secs = timecode.toDouble(&valid);
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if (valid) {
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// Convert milliseconds to seconds
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timecode_secs *= 0.001;
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// Convert seconds to frames
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timecode_secs /= timebase_dbl;
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if (ok) *ok = true;
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return qRound(timecode_secs);
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} else {
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goto err_fatal;
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}
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}
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case kFrames:
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if (ok) *ok = true;
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return timecode.toLong(ok);
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}
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err_fatal:
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if (ok) *ok = false;
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return 0;
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}
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rational Timecode::timecode_to_time(const QString &timecode, const rational &timebase, const Timecode::Display &display, bool *ok)
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{
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int64_t timestamp = timecode_to_timestamp(timecode, timebase, display, ok);
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return timestamp_to_time(timestamp, timebase);
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}
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rational Timecode::snap_time_to_timebase(const rational &time, const rational &timebase)
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{
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// Just convert to a timestamp in timebase units and back
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int64_t timestamp = time_to_timestamp(time, timebase);
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return timestamp_to_time(timestamp, timebase);
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}
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rational Timecode::timestamp_to_time(const int64_t ×tamp, const rational &timebase)
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{
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return rational(timestamp) * timebase;
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}
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QString Timecode::time_to_timecode(const rational &time, const rational &timebase, const Timecode::Display &display, bool show_plus_if_positive)
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{
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return timestamp_to_timecode(time_to_timestamp(time, timebase), timebase, display, show_plus_if_positive);
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}
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bool Timecode::TimebaseIsDropFrame(const rational &timebase)
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{
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return (timebase.numerator() == 1001);
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}
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QString Timecode::TimeToString(int64_t ms)
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{
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int64_t total_seconds = ms / 1000;
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int64_t ss = total_seconds % 60;
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int64_t mm = (total_seconds / 60) % 60;
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int64_t hh = total_seconds / 3600;
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return QStringLiteral("%1:%2:%3")
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.arg(hh, 2, 10, QChar('0'))
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.arg(mm, 2, 10, QChar('0'))
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.arg(ss, 2, 10, QChar('0'));
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}
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int64_t Timecode::time_to_timestamp(const rational &time, const rational &timebase)
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{
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return time_to_timestamp(time.toDouble(), timebase);
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}
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int64_t Timecode::time_to_timestamp(const double &time, const rational &timebase)
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{
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return qRound64(time * timebase.flipped().toDouble());
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}
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int64_t Timecode::rescale_timestamp(const int64_t &ts, const rational &source, const rational &dest)
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{
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if (source == dest) {
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return ts;
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}
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return qRound64(static_cast<double>(ts) * source.toDouble() / dest.toDouble());
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}
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int64_t Timecode::rescale_timestamp_ceil(const int64_t &ts, const rational &source, const rational &dest)
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{
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if (source == dest) {
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return ts;
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}
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return qCeil(static_cast<double>(ts) * source.toDouble() / dest.toDouble());
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}
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}
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