1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
|
/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU 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 General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*
*/
#include "video/video_decoder.h"
#include "common/file.h"
#include "common/system.h"
namespace Graphics {
VideoDecoder::VideoDecoder() {
reset();
}
bool VideoDecoder::loadFile(const Common::String &filename) {
Common::File *file = new Common::File();
if (!file->open(filename)) {
delete file;
return false;
}
return load(file);
}
uint32 VideoDecoder::getElapsedTime() const {
return g_system->getMillis() - _startTime;
}
void VideoDecoder::setSystemPalette() {
const byte *vidPalette = getPalette();
byte *sysPalette = new byte[256 * 4];
for (uint16 i = 0; i < 256; i++) {
sysPalette[i * 4] = vidPalette[i * 3];
sysPalette[i * 4 + 1] = vidPalette[i * 3 + 1];
sysPalette[i * 4 + 2] = vidPalette[i * 3 + 2];
sysPalette[i * 4 + 3] = 0;
}
g_system->setPalette(sysPalette, 0, 256);
delete[] sysPalette;
}
bool VideoDecoder::needsUpdate() const {
return !endOfVideo() && getTimeToNextFrame() == 0;
}
void VideoDecoder::reset() {
_curFrame = -1;
_startTime = 0;
_pauseLevel = 0;
}
bool VideoDecoder::endOfVideo() const {
return !isVideoLoaded() || (getCurFrame() >= (int32)getFrameCount() - 1);
}
void VideoDecoder::pauseVideo(bool pause) {
if (pause) {
_pauseLevel++;
// We can't go negative
} else if (_pauseLevel) {
_pauseLevel--;
// Do nothing
} else {
return;
}
if (_pauseLevel == 1 && pause) {
_pauseStartTime = g_system->getMillis(); // Store the starting time from pausing to keep it for later
pauseVideoIntern(true);
} else if (_pauseLevel == 0) {
pauseVideoIntern(false);
addPauseTime(g_system->getMillis() - _pauseStartTime);
}
}
void VideoDecoder::resetPauseStartTime() {
if (isPaused())
_pauseStartTime = g_system->getMillis();
}
uint32 FixedRateVideoDecoder::getTimeToNextFrame() const {
if (endOfVideo() || _curFrame < 0)
return 0;
uint32 elapsedTime = getElapsedTime();
uint32 nextFrameStartTime = getFrameBeginTime(_curFrame + 1);
// If the time that the next frame should be shown has past
// the frame should be shown ASAP.
if (nextFrameStartTime <= elapsedTime)
return 0;
return nextFrameStartTime - elapsedTime;
}
uint32 FixedRateVideoDecoder::getFrameBeginTime(uint32 frame) const {
Common::Rational beginTime = frame * 1000;
beginTime /= getFrameRate();
return beginTime.toInt();
}
VideoTimestamp::VideoTimestamp() : _units(0), _scale(1) {
}
VideoTimestamp::VideoTimestamp(uint units, uint scale) : _units(units), _scale(scale) {
assert(_scale);
}
uint VideoTimestamp::getUnitsInScale(uint scale) const {
assert(scale);
return (_scale == scale) ? _units : _units * scale / _scale;
}
} // End of namespace Graphics
|
