void AudioParam::calculateFinalValues(ContextRenderLock& r, float* values, unsigned numberOfValues, bool sampleAccurate)
{
bool isSafe = r.context() && values && numberOfValues;
if (!isSafe)
return;
// The calculated result will be the "intrinsic" value summed with all audio-rate connections.
if (sampleAccurate) {
// Calculate sample-accurate (a-rate) intrinsic values.
calculateTimelineValues(r, values, numberOfValues);
}
else {
// Calculate control-rate (k-rate) intrinsic value.
bool hasValue;
float timelineValue = m_timeline.valueForContextTime(r, narrowPrecisionToFloat(m_value), hasValue);
if (hasValue)
m_value = timelineValue;
values[0] = narrowPrecisionToFloat(m_value);
}
// if there are rendering connections, be sure they are ready
updateRenderingState(r);
size_t connectionCount = numberOfRenderingConnections(r);
if (!connectionCount)
return;
// Now sum all of the audio-rate connections together (unity-gain summing junction).
// Note that parameter connections would normally be mono, so mix down to mono if necessary.
// LabSound: For some reason a bus was temporarily created here and the results discarded.
// Bug still exists in WebKit top of tree.
//
if (m_data->m_internalSummingBus && m_data->m_internalSummingBus->length() < numberOfValues)
m_data->m_internalSummingBus.reset();
if (!m_data->m_internalSummingBus)
m_data->m_internalSummingBus.reset(new AudioBus(1, numberOfValues));
// point the summing bus at the values array
m_data->m_internalSummingBus->setChannelMemory(0, values, numberOfValues);
for (size_t i = 0; i < connectionCount; ++i) {
auto output = renderingOutput(r, i);
if (!output)
continue;
// Render audio from this output.
AudioBus* connectionBus = output->pull(r, 0, AudioNode::ProcessingSizeInFrames);
// Sum, with unity-gain.
m_data->m_internalSummingBus->sumFrom(*connectionBus);
}
}
void AudioParam::calculateFinalValues(float* values, unsigned numberOfValues, bool sampleAccurate)
{
bool isGood = context() && context()->isAudioThread() && values && numberOfValues;
ASSERT(isGood);
if (!isGood)
return;
// The calculated result will be the "intrinsic" value summed with all audio-rate connections.
if (sampleAccurate) {
// Calculate sample-accurate (a-rate) intrinsic values.
calculateTimelineValues(values, numberOfValues);
} else {
// Calculate control-rate (k-rate) intrinsic value.
bool hasValue;
float timelineValue = m_timeline.valueForContextTime(context(), narrowPrecisionToFloat(m_value), hasValue);
if (hasValue)
m_value = timelineValue;
values[0] = narrowPrecisionToFloat(m_value);
}
// Now sum all of the audio-rate connections together (unity-gain summing junction).
// Note that connections would normally be mono, but we mix down to mono if necessary.
RefPtr<AudioBus> summingBus = AudioBus::create(1, numberOfValues, false);
summingBus->setChannelMemory(0, values, numberOfValues);
for (unsigned i = 0; i < numberOfRenderingConnections(); ++i) {
AudioNodeOutput* output = renderingOutput(i);
ASSERT(output);
// Render audio from this output.
AudioBus* connectionBus = output->pull(0, AudioNode::ProcessingSizeInFrames);
// Sum, with unity-gain.
summingBus->sumFrom(*connectionBus);
}
}
