1 /*
2  * Copyright 2018 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 <unistd.h>
19 #include "AudioProcessorBase.h"
20 #include "SinkFloat.h"
21 
22 using namespace flowgraph;
23 
SinkFloat(int32_t channelCount)24 SinkFloat::SinkFloat(int32_t channelCount)
25         : AudioSink(channelCount) {
26 }
27 
read(void * data,int32_t numFrames)28 int32_t SinkFloat::read(void *data, int32_t numFrames) {
29     float *floatData = (float *) data;
30     int32_t channelCount = input.getSamplesPerFrame();
31 
32     int32_t framesLeft = numFrames;
33     while (framesLeft > 0) {
34         // Run the graph and pull data through the input port.
35         int32_t framesRead = pull(framesLeft);
36         if (framesRead <= 0) {
37             break;
38         }
39         const float *signal = input.getBlock();
40         int32_t numSamples = framesRead * channelCount;
41         memcpy(floatData, signal, numSamples * sizeof(float));
42         floatData += numSamples;
43         framesLeft -= framesRead;
44     }
45     return numFrames - framesLeft;
46 }
47