1 /***
2
3 Olive - Non-Linear Video Editor
4 Copyright (C) 2019 Olive Team
5
6 This program is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
18
19 ***/
20
21 #include "linearfadetransition.h"
22
LinearFadeTransition(Clip * c,Clip * s,const EffectMeta * em)23 LinearFadeTransition::LinearFadeTransition(Clip* c, Clip* s, const EffectMeta* em) : Transition(c, s, em) {}
24
process_audio(double timecode_start,double timecode_end,quint8 * samples,int nb_bytes,int type)25 void LinearFadeTransition::process_audio(double timecode_start, double timecode_end, quint8* samples, int nb_bytes, int type) {
26 double interval = (timecode_end-timecode_start)/nb_bytes;
27
28 for (int i=0;i<nb_bytes;i+=2) {
29 qint16 samp = (qint16) (((samples[i+1] & 0xFF) << 8) | (samples[i] & 0xFF));
30
31 switch (type) {
32 case kTransitionOpening:
33 samp *= timecode_start + (interval * i);
34 break;
35 case kTransitionClosing:
36 samp *= 1 - (timecode_start + (interval * i));
37 break;
38 }
39
40 samples[i+1] = (quint8) (samp >> 8);
41 samples[i] = (quint8) samp;
42 }
43 }
44