Mirrors/overte
3
0
Fork 0
mirror of https://github.com/overte-org/overte.git synced 2025-04-21 09:44:21 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions 2

Merge pull request #238 from birarda/off-axis

Browse source 
exaggerate the off-axis effect, fix double variable declaration
This commit is contained in:
birarda 2013-05-07 17:03:55 -07:00
commit 106dd3c6d2
1 changed files with 16 additions and 14 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

30
audio-mixer/src/main.cpp
View file

@ -60,7 +60,7 @@ const float DISTANCE_RATIO = 3.0f / 0.3f;
const float PHASE_AMPLITUDE_RATIO_AT_90 = 0.5;
const int PHASE_DELAY_AT_90 = 20;
const float MAX_OFF_AXIS_ATTENUATION = 0.5f;
const float MAX_OFF_AXIS_ATTENUATION = 0.2f;
const float OFF_AXIS_ATTENUATION_FORMULA_STEP = (1 - MAX_OFF_AXIS_ATTENUATION) / 2.0f;
void plateauAdditionOfSamples(int16_t &mixSample, int16_t sampleToAdd) {
@ -111,7 +111,6 @@ void *sendBuffer(void *args) {
for (AgentList::iterator agent = agentList->begin(); agent != agentList->end(); agent++) {
AudioRingBuffer* agentRingBuffer = (AudioRingBuffer*) agent->getLinkedData();
float agentBearing = agentRingBuffer->getBearing();
int16_t clientMix[BUFFER_LENGTH_SAMPLES_PER_CHANNEL * 2] = {};
@ -151,7 +150,7 @@ void *sendBuffer(void *args) {
float triangleAngle = atan2f(fabsf(agentPosition[2] - otherAgentPosition[2]),
fabsf(agentPosition[0] - otherAgentPosition[0])) * (180 / M_PI);
float absoluteAngleToSource = 0;
float bearingRelativeAngleToSource = 0;
bearingRelativeAngleToSource = 0;
// find the angle we need for calculation based on the orientation of the triangle
if (otherAgentPosition[0] > agentPosition[0]) {
@ -168,35 +167,38 @@ void *sendBuffer(void *args) {
}
}
if (absoluteAngleToSource > 180) {
absoluteAngleToSource -= 360;
} else if (absoluteAngleToSource < -180) {
absoluteAngleToSource += 360;
}
bearingRelativeAngleToSource = absoluteAngleToSource - agentRingBuffer->getBearing();
bearingRelativeAngleToSource = absoluteAngleToSource - agentBearing;
bearingRelativeAngleToSource *= (M_PI / 180);
if (bearingRelativeAngleToSource > 180) {
bearingRelativeAngleToSource -= 360;
} else if (bearingRelativeAngleToSource < -180) {
bearingRelativeAngleToSource += 360;
}
float angleOfDelivery = absoluteAngleToSource - otherAgentBuffer->getBearing();
if (angleOfDelivery < -180) {
if (angleOfDelivery > 180) {
angleOfDelivery -= 360;
} else if (angleOfDelivery < -180) {
angleOfDelivery += 360;
}
float offAxisCoefficient = MAX_OFF_AXIS_ATTENUATION +
(OFF_AXIS_ATTENUATION_FORMULA_STEP * (fabsf(angleOfDelivery) / 90.0f));
(OFF_AXIS_ATTENUATION_FORMULA_STEP * (fabsf(angleOfDelivery) / 90.0f));
attenuationCoefficient = distanceCoefficients[lowAgentIndex][highAgentIndex]
* otherAgentBuffer->getAttenuationRatio()
* offAxisCoefficient;
bearingRelativeAngleToSource *= (M_PI / 180);
float sinRatio = fabsf(sinf(bearingRelativeAngleToSource));
numSamplesDelay = PHASE_DELAY_AT_90 * sinRatio;
weakChannelAmplitudeRatio = 1 - (PHASE_AMPLITUDE_RATIO_AT_90 * sinRatio);
}
int16_t* goodChannel = bearingRelativeAngleToSource > 0 ? clientMix + BUFFER_LENGTH_SAMPLES_PER_CHANNEL : clientMix;
int16_t* delayedChannel = bearingRelativeAngleToSource > 0 ? clientMix : clientMix + BUFFER_LENGTH_SAMPLES_PER_CHANNEL;
int16_t* goodChannel = bearingRelativeAngleToSource > 0.0f ? clientMix + BUFFER_LENGTH_SAMPLES_PER_CHANNEL : clientMix;
int16_t* delayedChannel = bearingRelativeAngleToSource > 0.0f ? clientMix : clientMix + BUFFER_LENGTH_SAMPLES_PER_CHANNEL;
int16_t* delaySamplePointer = otherAgentBuffer->getNextOutput() == otherAgentBuffer->getBuffer()
? otherAgentBuffer->getBuffer() + RING_BUFFER_SAMPLES - numSamplesDelay