1 /*
2  * Copyright 2023 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 "FlowGraphNode.h"
21 #include "SourceI8_24.h"
22 
23 #if FLOWGRAPH_ANDROID_INTERNAL
24 #include <audio_utils/primitives.h>
25 #endif
26 
27 using namespace FLOWGRAPH_OUTER_NAMESPACE::flowgraph;
28 
SourceI8_24(int32_t channelCount)29 SourceI8_24::SourceI8_24(int32_t channelCount)
30         : FlowGraphSourceBuffered(channelCount) {
31 }
32 
onProcess(int32_t numFrames)33 int32_t SourceI8_24::onProcess(int32_t numFrames) {
34     float *floatData = output.getBuffer();
35     const int32_t channelCount = output.getSamplesPerFrame();
36 
37     const int32_t framesLeft = mSizeInFrames - mFrameIndex;
38     const int32_t framesToProcess = std::min(numFrames, framesLeft);
39     const int32_t numSamples = framesToProcess * channelCount;
40 
41     const int32_t *intBase = static_cast<const int32_t *>(mData);
42     const int32_t *intData = &intBase[mFrameIndex * channelCount];
43 
44 #if FLOWGRAPH_ANDROID_INTERNAL
45     memcpy_to_float_from_q8_23(floatData, intData, numSamples);
46 #else
47     for (int i = 0; i < numSamples; i++) {
48         *floatData++ = *intData++ * kScale;
49     }
50 #endif
51 
52     mFrameIndex += framesToProcess;
53     return framesToProcess;
54 }
55