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make pulsate function into a cos

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Atlante45 2014-11-10 15:12:40 -08:00
parent 53fb9e9047
commit 125ef0e3e2
2 changed files with 18 additions and 17 deletions
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33
interface/src/Audio.cpp
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@ -54,9 +54,6 @@ static const int APPROXIMATELY_30_SECONDS_OF_AUDIO_PACKETS = (int)(30.0f * 1000.
// Mute icon configration
static const int MUTE_ICON_SIZE = 24;
static const float PULSE_MIN = 0.0f;
static const float PULSE_MAX = 1.0f;
static const float PULSE_STEP = 0.05f;
static const int RECEIVED_AUDIO_STREAM_CAPACITY_FRAMES = 100;
@ -102,7 +99,7 @@ Audio::Audio(QObject* parent) :
_reverbOptions(&_scriptReverbOptions),
_gverb(NULL),
_iconColor(1.0f),
_iconPulseFactor(-1),
_iconPulseTimeReference(usecTimestampNow()),
_processSpatialAudio(false),
_spatialAudioStart(0),
_spatialAudioFinish(0),
@ -1397,33 +1394,37 @@ void Audio::renderToolBox(int x, int y, bool boxed) {
if (!_muted) {
glBindTexture(GL_TEXTURE_2D, _micTextureId);
_iconColor = 1.0f;
_iconPulseFactor = -1;
} else {
glBindTexture(GL_TEXTURE_2D, _muteTextureId);
// Make muted icon pulsate
_iconColor += _iconPulseFactor * PULSE_STEP;
if (_iconColor >= PULSE_MAX) {
_iconColor = PULSE_MAX;
_iconPulseFactor = -1;
} else if (_iconColor <= PULSE_MIN) {
_iconColor = PULSE_MIN;
_iconPulseFactor = 1;
static const float PULSE_MIN = 0.4f;
static const float PULSE_MAX = 1.0f;
static const float PULSE_FREQUENCY = 1.0f; // in Hz
qint64 now = usecTimestampNow();
if (now - _iconPulseTimeReference > USECS_PER_SECOND) {
// Prevents t from getting too big, which would diminish glm::cos precision
_iconPulseTimeReference = now - ((now - _iconPulseTimeReference) % USECS_PER_SECOND);
}
float t = (float)(now - _iconPulseTimeReference) / (float)USECS_PER_SECOND;
float pulseFactor = (glm::cos(t * PULSE_FREQUENCY * 2.0f * PI) + 1.0f) / 2.0f;
_iconColor = PULSE_MIN + (PULSE_MAX - PULSE_MIN) * pulseFactor;
}
glColor3f(_iconColor, _iconColor, _iconColor);
glBegin(GL_QUADS);
glTexCoord2f(1, 1);
glTexCoord2f(1.0f, 1.0f);
glVertex2f(_iconBounds.left(), _iconBounds.top());
glTexCoord2f(0, 1);
glTexCoord2f(0.0f, 1.0f);
glVertex2f(_iconBounds.right(), _iconBounds.top());
glTexCoord2f(0, 0);
glTexCoord2f(0.0f, 0.0f);
glVertex2f(_iconBounds.right(), _iconBounds.bottom());
glTexCoord2f(1, 0);
glTexCoord2f(1.0f, 0.0f);
glVertex2f(_iconBounds.left(), _iconBounds.bottom());
glEnd();

2
interface/src/Audio.h
View file

@ -254,7 +254,7 @@ private:
GLuint _boxTextureId;
QRect _iconBounds;
float _iconColor;
int _iconPulseFactor;
qint64 _iconPulseTimeReference;
/// Audio callback in class context.
inline void performIO(int16_t* inputLeft, int16_t* outputLeft, int16_t* outputRight);