1 /*
2 * Copyright 2021 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 "FormatConverterBox.h"
18
FormatConverterBox(int32_t numSamples,oboe::AudioFormat inputFormat,oboe::AudioFormat outputFormat)19 FormatConverterBox::FormatConverterBox(int32_t numSamples,
20 oboe::AudioFormat inputFormat,
21 oboe::AudioFormat outputFormat) {
22 mInputFormat = inputFormat;
23 mOutputFormat = outputFormat;
24
25 mInputBuffer = std::make_unique<uint8_t[]>(numSamples * sizeof(int32_t));
26 mOutputBuffer = std::make_unique<uint8_t[]>(numSamples * sizeof(int32_t));
27
28 mSource.reset();
29 switch (mInputFormat) {
30 case oboe::AudioFormat::I16:
31 mSource = std::make_unique<oboe::flowgraph::SourceI16>(1);
32 break;
33 case oboe::AudioFormat::I24:
34 mSource = std::make_unique<oboe::flowgraph::SourceI24>(1);
35 break;
36 case oboe::AudioFormat::I32:
37 mSource = std::make_unique<oboe::flowgraph::SourceI32>(1);
38 break;
39 case oboe::AudioFormat::Float:
40 case oboe::AudioFormat::Invalid:
41 case oboe::AudioFormat::Unspecified:
42 mSource = std::make_unique<oboe::flowgraph::SourceFloat>(1);
43 break;
44 }
45
46 mSink.reset();
47 switch (mOutputFormat) {
48 case oboe::AudioFormat::I16:
49 mSink = std::make_unique<oboe::flowgraph::SinkI16>(1);
50 break;
51 case oboe::AudioFormat::I24:
52 mSink = std::make_unique<oboe::flowgraph::SinkI24>(1);
53 break;
54 case oboe::AudioFormat::I32:
55 mSink = std::make_unique<oboe::flowgraph::SinkI32>(1);
56 break;
57 case oboe::AudioFormat::Float:
58 case oboe::AudioFormat::Invalid:
59 case oboe::AudioFormat::Unspecified:
60 mSink = std::make_unique<oboe::flowgraph::SinkFloat>(1);
61 break;
62 }
63
64 if (mSource && mSink) {
65 mSource->output.connect(&mSink->input);
66 mSink->pullReset();
67 }
68 }
69
convertInternalBuffers(int32_t numSamples)70 int32_t FormatConverterBox::convertInternalBuffers(int32_t numSamples) {
71 return convert(getOutputBuffer(), numSamples, getInputBuffer());
72 }
73
convertToInternalOutput(int32_t numSamples,const void * inputBuffer)74 int32_t FormatConverterBox::convertToInternalOutput(int32_t numSamples, const void *inputBuffer) {
75 return convert(getOutputBuffer(), numSamples, inputBuffer);
76 }
77
convertFromInternalInput(void * outputBuffer,int32_t numSamples)78 int32_t FormatConverterBox::convertFromInternalInput(void *outputBuffer, int32_t numSamples) {
79 return convert(outputBuffer, numSamples, getInputBuffer());
80 }
81
convert(void * outputBuffer,int32_t numSamples,const void * inputBuffer)82 int32_t FormatConverterBox::convert(void *outputBuffer, int32_t numSamples, const void *inputBuffer) {
83 mSource->setData(inputBuffer, numSamples);
84 return mSink->read(outputBuffer, numSamples);
85 }
86