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