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/*
* Copyright 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "stdio.h"
#include <algorithm>
#include <sys/types.h>
#include "FlowGraphNode.h"
using namespace flowgraph;
/***************************************************************************/
int32_t FlowGraphNode::pullData(int64_t framePosition, int32_t numFrames) {
int32_t frameCount = numFrames;
// Prevent recursion and multiple execution of nodes.
if (framePosition <= mLastFramePosition && !mBlockRecursion) {
mBlockRecursion = true; // for cyclic graphs
if (mDataPulledAutomatically) {
// Pull from all the upstream nodes.
for (auto &port : mInputPorts) {
// TODO fix bug of leaving unused data in some ports if using multiple AudioSource
frameCount = port.get().pullData(framePosition, frameCount);
}
}
if (frameCount > 0) {
frameCount = onProcess(frameCount);
}
mLastFramePosition += frameCount;
mBlockRecursion = false;
mLastFrameCount = frameCount;
} else {
frameCount = mLastFrameCount;
}
return frameCount;
}
void FlowGraphNode::pullReset() {
if (!mBlockRecursion) {
mBlockRecursion = true; // for cyclic graphs
// Pull reset from all the upstream nodes.
for (auto &port : mInputPorts) {
port.get().pullReset();
}
mBlockRecursion = false;
reset();
}
}
void FlowGraphNode::reset() {
mLastFrameCount = 0;
}
/***************************************************************************/
FlowGraphPortFloat::FlowGraphPortFloat(FlowGraphNode &parent,
int32_t samplesPerFrame,
int32_t framesPerBuffer)
: FlowGraphPort(parent, samplesPerFrame)
, mFramesPerBuffer(framesPerBuffer)
, mBuffer(nullptr) {
size_t numFloats = static_cast<size_t>(framesPerBuffer * getSamplesPerFrame());
mBuffer = std::make_unique<float[]>(numFloats);
}
/***************************************************************************/
int32_t FlowGraphPortFloatOutput::pullData(int64_t framePosition, int32_t numFrames) {
numFrames = std::min(getFramesPerBuffer(), numFrames);
return mContainingNode.pullData(framePosition, numFrames);
}
void FlowGraphPortFloatOutput::pullReset() {
mContainingNode.pullReset();
}
// These need to be in the .cpp file because of forward cross references.
void FlowGraphPortFloatOutput::connect(FlowGraphPortFloatInput *port) {
port->connect(this);
}
void FlowGraphPortFloatOutput::disconnect(FlowGraphPortFloatInput *port) {
port->disconnect(this);
}
/***************************************************************************/
int32_t FlowGraphPortFloatInput::pullData(int64_t framePosition, int32_t numFrames) {
return (mConnected == nullptr)
? std::min(getFramesPerBuffer(), numFrames)
: mConnected->pullData(framePosition, numFrames);
}
void FlowGraphPortFloatInput::pullReset() {
if (mConnected != nullptr) mConnected->pullReset();
}
float *FlowGraphPortFloatInput::getBuffer() {
if (mConnected == nullptr) {
return FlowGraphPortFloat::getBuffer(); // loaded using setValue()
} else {
return mConnected->getBuffer();
}
}
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