itsmattkc
7f796bd99f
frames Previously, when the video renderer received a dirty cache signal, it would proceed to extract all frames from the range and queue them. However, this could be extremely slow for long ranges since it had to iterate through the entire range and calculate the individual frames it contained. Now, we use the same range combining system as audio and automatically calculate the next frame within the range only when necessary. Essentially the same work, but split up over time and done only when needed leading to no discernible UI pause when invalidating cache.
70 lines
2.3 KiB
C++
70 lines
2.3 KiB
C++
/***
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Olive - Non-Linear Video Editor
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Copyright (C) 2019 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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#ifndef TIMECODEFUNCTIONS_H
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#define TIMECODEFUNCTIONS_H
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#include <QString>
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#include "common/rational.h"
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/**
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* @brief Functions for converting times/timecodes/timestamps
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*
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* Olive uses the following terminology through its code:
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*
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* `time` - time in seconds presented in a rational form
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* `timebase` - the base time unit of an audio/video stream in seconds
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* `timestamp` - an integer representation of a time in timebase units (in many cases is used like a frame number)
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* `timecode` a user-friendly string representation of a time according to Timecode::Display
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*/
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class Timecode {
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public:
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enum Display {
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kTimecodeDropFrame,
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kTimecodeNonDropFrame,
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kTimecodeSeconds,
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kFrames,
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kMilliseconds
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};
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static Display CurrentDisplay();
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static void SetCurrentDisplay(Display d);
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/**
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* @brief Convert a timestamp (according to a rational timebase) to a user-friendly string representation
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*/
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static QString timestamp_to_timecode(const int64_t ×tamp, const rational& timebase, const Display &display, bool show_plus_if_positive = false);
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static int64_t timecode_to_timestamp(const QString& timecode, const rational& timebase, const Display& display, bool *ok = nullptr);
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static rational snap_time_to_timebase(const rational& time, const rational& timebase);
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static int64_t time_to_timestamp(const rational& time, const rational& timebase);
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static int64_t time_to_timestamp(const double& time, const rational& timebase);
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static rational timestamp_to_time(const int64_t& timestamp, const rational& timebase);
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static bool TimebaseIsDropFrame(const rational& timebase);
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};
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#endif // TIMECODEFUNCTIONS_H
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