1 /*
2 * Copyright 2015 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include <algorithm>
18 #include <sys/types.h>
19 #include "AudioProcessorBase.h"
20
21 using namespace flowgraph;
22
23 /***************************************************************************/
pullData(int64_t framePosition,int32_t numFrames)24 int32_t AudioProcessorBase::pullData(int64_t framePosition, int32_t numFrames) {
25 if (framePosition > mLastFramePosition) {
26 mLastFramePosition = framePosition;
27 mFramesValid = onProcess(framePosition, numFrames);
28 }
29 return mFramesValid;
30 }
31
32 /***************************************************************************/
AudioFloatBlockPort(AudioProcessorBase & parent,int32_t samplesPerFrame,int32_t framesPerBlock)33 AudioFloatBlockPort::AudioFloatBlockPort(AudioProcessorBase &parent,
34 int32_t samplesPerFrame,
35 int32_t framesPerBlock)
36 : AudioPort(parent, samplesPerFrame)
37 , mFramesPerBlock(framesPerBlock)
38 , mSampleBlock(NULL) {
39 int32_t numFloats = framesPerBlock * getSamplesPerFrame();
40 mSampleBlock = new float[numFloats]{0.0f};
41 }
42
~AudioFloatBlockPort()43 AudioFloatBlockPort::~AudioFloatBlockPort() {
44 delete[] mSampleBlock;
45 }
46
47 /***************************************************************************/
pullData(int64_t framePosition,int32_t numFrames)48 int32_t AudioFloatOutputPort::pullData(int64_t framePosition, int32_t numFrames) {
49 numFrames = std::min(getFramesPerBlock(), numFrames);
50 return mParent.pullData(framePosition, numFrames);
51 }
52
53 // These need to be in the .cpp file because of forward cross references.
connect(AudioFloatInputPort * port)54 void AudioFloatOutputPort::connect(AudioFloatInputPort *port) {
55 port->connect(this);
56 }
57
disconnect(AudioFloatInputPort * port)58 void AudioFloatOutputPort::disconnect(AudioFloatInputPort *port) {
59 port->disconnect(this);
60 }
61
62 /***************************************************************************/
pullData(int64_t framePosition,int32_t numFrames)63 int32_t AudioFloatInputPort::pullData(int64_t framePosition, int32_t numFrames) {
64 return (mConnected == NULL)
65 ? std::min(getFramesPerBlock(), numFrames)
66 : mConnected->pullData(framePosition, numFrames);
67 }
68
getBlock()69 float *AudioFloatInputPort::getBlock() {
70 if (mConnected == NULL) {
71 return AudioFloatBlockPort::getBlock(); // loaded using setValue()
72 } else {
73 return mConnected->getBlock();
74 }
75 }
76
77 /***************************************************************************/
pull(int32_t numFrames)78 int32_t AudioSink::pull(int32_t numFrames) {
79 int32_t actualFrames = input.pullData(mFramePosition, numFrames);
80 mFramePosition += actualFrames;
81 return actualFrames;
82 }