27 lines
764 B
C++
27 lines
764 B
C++
#include "transition.h"
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LinearFadeTransition::LinearFadeTransition() : Transition(AUDIO_LINEAR_FADE_TRANSITION) {}
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void LinearFadeTransition::process_audio(double range_start, double range_end, quint8* samples, int nb_samples, bool reverse) {
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double interval = (range_end - range_start) / nb_samples;
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for (int i=0;i<nb_samples;i+=2) {
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qint16 samp = (qint16) (((samples[i+1] & 0xFF) << 8) | (samples[i] & 0xFF));
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if (reverse) {
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samp *= 1 - (range_start + (interval * i));
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} else {
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samp *= range_start + (interval * i);
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}
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samples[i+1] = (quint8) (samp >> 8);
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samples[i] = (quint8) samp;
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}
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}
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Transition* LinearFadeTransition::copy() {
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Transition* t = new LinearFadeTransition();
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t->length = length;
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return t;
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}
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