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#include "engine/effects/engineeffectrack.h"
#include "engine/effects/engineeffectchain.h"
#include "util/defs.h"
#include "util/sample.h"
EngineEffectRack::EngineEffectRack(int iRackNumber)
: m_iRackNumber(iRackNumber),
m_buffer1(MAX_BUFFER_LEN),
m_buffer2(MAX_BUFFER_LEN) {
// Try to prevent memory allocation.
m_chains.reserve(256);
}
EngineEffectRack::~EngineEffectRack() {
//qDebug() << "EngineEffectRack::~EngineEffectRack()" << this;
}
bool EngineEffectRack::processEffectsRequest(EffectsRequest& message,
EffectsResponsePipe* pResponsePipe) {
EffectsResponse response(message);
switch (message.type) {
case EffectsRequest::ADD_CHAIN_TO_RACK:
if (kEffectDebugOutput) {
qDebug() << debugString() << "ADD_CHAIN_TO_RACK"
<< message.AddChainToRack.pChain
<< message.AddChainToRack.iIndex;
}
response.success = addEffectChain(message.AddChainToRack.pChain,
message.AddChainToRack.iIndex);
break;
case EffectsRequest::REMOVE_CHAIN_FROM_RACK:
if (kEffectDebugOutput) {
qDebug() << debugString() << "REMOVE_CHAIN_FROM_RACK"
<< message.RemoveChainFromRack.pChain
<< message.RemoveChainFromRack.iIndex;
}
response.success = removeEffectChain(message.RemoveChainFromRack.pChain,
message.RemoveChainFromRack.iIndex);
break;
default:
return false;
}
pResponsePipe->writeMessage(response);
return true;
}
bool EngineEffectRack::process(const ChannelHandle& inputHandle,
const ChannelHandle& outputHandle,
CSAMPLE* pIn, CSAMPLE* pOut,
const unsigned int numSamples,
const unsigned int sampleRate,
const GroupFeatureState& groupFeatures) {
bool processingOccured = false;
if (pIn == pOut) {
// Effects are applied to the buffer in place
for (EngineEffectChain* pChain : m_chains) {
if (pChain != nullptr) {
if (pChain->process(inputHandle, outputHandle,
pIn, pOut,
numSamples, sampleRate, groupFeatures)) {
processingOccured = true;
}
}
}
} else {
// Do not modify the input buffer; only fill the output buffer.
CSAMPLE* pIntermediateInput = pIn;
CSAMPLE* pIntermediateOutput;
for (EngineEffectChain* pChain : m_chains) {
if (pChain != nullptr) {
// Select an unused intermediate buffer for the next output
if (pIntermediateInput == m_buffer1.data()) {
pIntermediateOutput = m_buffer2.data();
} else {
pIntermediateOutput = m_buffer1.data();
}
if (pChain->process(inputHandle, outputHandle,
pIntermediateInput, pIntermediateOutput,
numSamples, sampleRate, groupFeatures)) {
processingOccured = true;
// Output of this chain becomes the input of the next chain.
pIntermediateInput = pIntermediateOutput;
}
}
}
// pIntermediateInput is the output of the last processed chain. It would be the
// intermediate input of the next chain if there was one.
if (processingOccured) {
SampleUtil::copy(pOut, pIntermediateInput, numSamples);
}
}
return processingOccured;
}
bool EngineEffectRack::addEffectChain(EngineEffectChain* pChain, int iIndex) {
if (iIndex < 0) {
if (kEffectDebugOutput) {
qDebug() << debugString()
<< "WARNING: ADD_CHAIN_TO_RACK message with invalid index:"
<< iIndex;
}
return false;
}
if (m_chains.contains(pChain)) {
if (kEffectDebugOutput) {
qDebug() << debugString() << "WARNING: chain already added to EngineEffectRack:"
<< pChain->id();
}
return false;
}
while (iIndex >= m_chains.size()) {
m_chains.append(NULL);
}
m_chains.replace(iIndex, pChain);
return true;
}
bool EngineEffectRack::removeEffectChain(EngineEffectChain* pChain, int iIndex) {
VERIFY_OR_DEBUG_ASSERT(iIndex < m_chains.size()) {
if (kEffectDebugOutput) {
qDebug() << debugString()
<< "WARNING: REMOVE_CHAIN_FROM_RACK message with invalid index:"
<< iIndex;
}
return false;
}
if (m_chains.at(iIndex) != pChain) {
qDebug() << debugString()
<< "WARNING: REMOVE_CHAIN_FROM_RACK consistency error"
<< m_chains.at(iIndex) << "loaded but received request to remove"
<< pChain;
return false;
}
m_chains.replace(iIndex, NULL);
return true;
}
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