mirror of
https://github.com/libretro/scummvm.git
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122 lines
3.0 KiB
C++
122 lines
3.0 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (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, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* $URL$
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* $Id$
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*
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*/
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#include "video/video_decoder.h"
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#include "common/rational.h"
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#include "common/file.h"
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#include "common/system.h"
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#include "graphics/palette.h"
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namespace Video {
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VideoDecoder::VideoDecoder() {
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reset();
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}
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bool VideoDecoder::loadFile(const Common::String &filename) {
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Common::File *file = new Common::File();
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if (!file->open(filename)) {
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delete file;
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return false;
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}
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return loadStream(file);
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}
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uint32 VideoDecoder::getElapsedTime() const {
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return g_system->getMillis() - _startTime;
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}
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void VideoDecoder::setSystemPalette() {
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g_system->getPaletteManager()->setPalette(getPalette(), 0, 256);
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}
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bool VideoDecoder::needsUpdate() const {
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return !endOfVideo() && getTimeToNextFrame() == 0;
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}
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void VideoDecoder::reset() {
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_curFrame = -1;
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_startTime = 0;
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_pauseLevel = 0;
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}
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bool VideoDecoder::endOfVideo() const {
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return !isVideoLoaded() || (getCurFrame() >= (int32)getFrameCount() - 1);
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}
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void VideoDecoder::pauseVideo(bool pause) {
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if (pause) {
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_pauseLevel++;
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// We can't go negative
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} else if (_pauseLevel) {
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_pauseLevel--;
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// Do nothing
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} else {
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return;
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}
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if (_pauseLevel == 1 && pause) {
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_pauseStartTime = g_system->getMillis(); // Store the starting time from pausing to keep it for later
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pauseVideoIntern(true);
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} else if (_pauseLevel == 0) {
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pauseVideoIntern(false);
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addPauseTime(g_system->getMillis() - _pauseStartTime);
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}
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}
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void VideoDecoder::resetPauseStartTime() {
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if (isPaused())
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_pauseStartTime = g_system->getMillis();
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}
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uint32 FixedRateVideoDecoder::getTimeToNextFrame() const {
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if (endOfVideo() || _curFrame < 0)
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return 0;
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uint32 elapsedTime = getElapsedTime();
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uint32 nextFrameStartTime = getFrameBeginTime(_curFrame + 1);
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// If the time that the next frame should be shown has past
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// the frame should be shown ASAP.
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if (nextFrameStartTime <= elapsedTime)
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return 0;
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return nextFrameStartTime - elapsedTime;
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}
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uint32 FixedRateVideoDecoder::getFrameBeginTime(uint32 frame) const {
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Common::Rational beginTime = frame * 1000;
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beginTime /= getFrameRate();
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return beginTime.toInt();
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}
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} // End of namespace Video
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