mirror of
https://github.com/HifiExperiments/overte.git
synced 2025-08-04 16:09:22 +02:00
clean up audio-mixer computeGain helper
This commit is contained in:
parent
ca727b7920
commit
fe1847f965
1 changed files with 14 additions and 19 deletions
|
@ -498,36 +498,30 @@ float computeGain(const AvatarAudioStream& listeningNodeStream, const Positional
|
|||
const glm::vec3& relativePosition, bool isEcho) {
|
||||
float gain = 1.0f;
|
||||
|
||||
float distanceBetween = glm::length(relativePosition);
|
||||
|
||||
if (distanceBetween < EPSILON) {
|
||||
distanceBetween = EPSILON;
|
||||
}
|
||||
|
||||
// injector: apply attenuation
|
||||
if (streamToAdd.getType() == PositionalAudioStream::Injector) {
|
||||
gain *= reinterpret_cast<const InjectedAudioStream*>(&streamToAdd)->getAttenuationRatio();
|
||||
}
|
||||
|
||||
// avatar: apply fixed off-axis attentuation to make them quieter as they turn away
|
||||
if (!isEcho && (streamToAdd.getType() == PositionalAudioStream::Microphone)) {
|
||||
// source is another avatar, apply fixed off-axis attenuation to make them quieter as they turn away from listener
|
||||
glm::vec3 rotatedListenerPosition = glm::inverse(streamToAdd.getOrientation()) * relativePosition;
|
||||
|
||||
float angleOfDelivery = glm::angle(glm::vec3(0.0f, 0.0f, -1.0f),
|
||||
glm::normalize(rotatedListenerPosition));
|
||||
|
||||
const float MAX_OFF_AXIS_ATTENUATION = 0.2f;
|
||||
const float OFF_AXIS_ATTENUATION_FORMULA_STEP = (1 - MAX_OFF_AXIS_ATTENUATION) / 2.0f;
|
||||
|
||||
const float OFF_AXIS_ATTENUATION_STEP = (1 - MAX_OFF_AXIS_ATTENUATION) / 2.0f;
|
||||
float offAxisCoefficient = MAX_OFF_AXIS_ATTENUATION +
|
||||
(OFF_AXIS_ATTENUATION_FORMULA_STEP * (angleOfDelivery / PI_OVER_TWO));
|
||||
(OFF_AXIS_ATTENUATION_STEP * (angleOfDelivery / PI_OVER_TWO));
|
||||
|
||||
// multiply the current attenuation coefficient by the calculated off axis coefficient
|
||||
gain *= offAxisCoefficient;
|
||||
}
|
||||
|
||||
float attenuationPerDoublingInDistance = AudioMixer::getAttenuationPerDoublingInDistance();
|
||||
auto& zoneSettings = AudioMixer::getZoneSettings();
|
||||
auto& audioZones = AudioMixer::getAudioZones();
|
||||
auto& zoneSettings = AudioMixer::getZoneSettings();
|
||||
|
||||
// find distance attenuation coefficient
|
||||
float attenuationPerDoublingInDistance = AudioMixer::getAttenuationPerDoublingInDistance();
|
||||
for (int i = 0; i < zoneSettings.length(); ++i) {
|
||||
if (audioZones[zoneSettings[i].source].contains(streamToAdd.getPosition()) &&
|
||||
audioZones[zoneSettings[i].listener].contains(listeningNodeStream.getPosition())) {
|
||||
|
@ -536,16 +530,17 @@ float computeGain(const AvatarAudioStream& listeningNodeStream, const Positional
|
|||
}
|
||||
}
|
||||
|
||||
const float ATTENUATION_BEGINS_AT_DISTANCE = 1.0f;
|
||||
if (distanceBetween >= ATTENUATION_BEGINS_AT_DISTANCE) {
|
||||
// compute distance attenuation
|
||||
const float ATTENUATION_START_DISTANCE = 1.0f;
|
||||
float distance = std::max(glm::length(relativePosition), EPSILON);
|
||||
if (distance >= ATTENUATION_START_DISTANCE) {
|
||||
|
||||
// translate the zone setting to gain per log2(distance)
|
||||
float g = 1.0f - attenuationPerDoublingInDistance;
|
||||
g = (g < EPSILON) ? EPSILON : g;
|
||||
g = (g > 1.0f) ? 1.0f : g;
|
||||
g = glm::clamp(g, EPSILON, 1.0f);
|
||||
|
||||
// calculate the distance coefficient using the distance to this node
|
||||
float distanceCoefficient = fastExp2f(fastLog2f(g) * fastLog2f(distanceBetween/ATTENUATION_BEGINS_AT_DISTANCE));
|
||||
float distanceCoefficient = fastExp2f(fastLog2f(g) * fastLog2f(distance/ATTENUATION_START_DISTANCE));
|
||||
|
||||
// multiply the current attenuation coefficient by the distance coefficient
|
||||
gain *= distanceCoefficient;
|
||||
|
|
Loading…
Reference in a new issue