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
20 #ifdef __ANDROID__
21 #include <audio_utils/primitives.h>
22 #endif
23
24 #include "AudioProcessorBase.h"
25 #include "SinkI16.h"
26
27 using namespace flowgraph;
28
SinkI16(int32_t channelCount)29 SinkI16::SinkI16(int32_t channelCount)
30 : AudioSink(channelCount) {}
31
read(void * data,int32_t numFrames)32 int32_t SinkI16::read(void *data, int32_t numFrames) {
33 int16_t *shortData = (int16_t *) data;
34 const int32_t channelCount = input.getSamplesPerFrame();
35
36 int32_t framesLeft = numFrames;
37 while (framesLeft > 0) {
38 // Run the graph and pull data through the input port.
39 int32_t framesRead = pull(framesLeft);
40 if (framesRead <= 0) {
41 break;
42 }
43 const float *signal = input.getBlock();
44 int32_t numSamples = framesRead * channelCount;
45 #ifdef __ANDROID__
46 memcpy_to_i16_from_float(shortData, signal, numSamples);
47 shortData += numSamples;
48 signal += numSamples;
49 #else
50 for (int i = 0; i < numSamples; i++) {
51 int32_t n = (int32_t) (*signal++ * 32768.0f);
52 *shortData++ = std::min(INT16_MAX, std::max(INT16_MIN, n)); // clip
53 }
54 #endif
55 framesLeft -= framesRead;
56 }
57 return numFrames - framesLeft;
58 }
59