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 maxSamples,oboe::AudioFormat inputFormat,oboe::AudioFormat outputFormat)19 FormatConverterBox::FormatConverterBox(int32_t maxSamples,
20 oboe::AudioFormat inputFormat,
21 oboe::AudioFormat outputFormat) {
22 mInputFormat = inputFormat;
23 mOutputFormat = outputFormat;
24
25 mMaxSamples = maxSamples;
26 mInputBuffer = std::make_unique<uint8_t[]>(maxSamples * sizeof(int32_t));
27 mOutputBuffer = std::make_unique<uint8_t[]>(maxSamples * sizeof(int32_t));
28
29 mSource.reset();
30 switch (mInputFormat) {
31 case oboe::AudioFormat::I16:
32 case oboe::AudioFormat::IEC61937:
33 mSource = std::make_unique<oboe::flowgraph::SourceI16>(1);
34 break;
35 case oboe::AudioFormat::I24:
36 mSource = std::make_unique<oboe::flowgraph::SourceI24>(1);
37 break;
38 case oboe::AudioFormat::I32:
39 mSource = std::make_unique<oboe::flowgraph::SourceI32>(1);
40 break;
41 case oboe::AudioFormat::Float:
42 case oboe::AudioFormat::Invalid:
43 case oboe::AudioFormat::Unspecified:
44 mSource = std::make_unique<oboe::flowgraph::SourceFloat>(1);
45 break;
46 }
47
48 mSink.reset();
49 switch (mOutputFormat) {
50 case oboe::AudioFormat::I16:
51 case oboe::AudioFormat::IEC61937:
52 mSink = std::make_unique<oboe::flowgraph::SinkI16>(1);
53 break;
54 case oboe::AudioFormat::I24:
55 mSink = std::make_unique<oboe::flowgraph::SinkI24>(1);
56 break;
57 case oboe::AudioFormat::I32:
58 mSink = std::make_unique<oboe::flowgraph::SinkI32>(1);
59 break;
60 case oboe::AudioFormat::Float:
61 case oboe::AudioFormat::Invalid:
62 case oboe::AudioFormat::Unspecified:
63 mSink = std::make_unique<oboe::flowgraph::SinkFloat>(1);
64 break;
65 }
66
67 if (mSource && mSink) {
68 mSource->output.connect(&mSink->input);
69 mSink->pullReset();
70 }
71 }
72
convertInternalBuffers(int32_t numSamples)73 int32_t FormatConverterBox::convertInternalBuffers(int32_t numSamples) {
74 assert(numSamples <= mMaxSamples);
75 return convert(getOutputBuffer(), numSamples, getInputBuffer());
76 }
77
convertToInternalOutput(int32_t numSamples,const void * inputBuffer)78 int32_t FormatConverterBox::convertToInternalOutput(int32_t numSamples, const void *inputBuffer) {
79 assert(numSamples <= mMaxSamples);
80 return convert(getOutputBuffer(), numSamples, inputBuffer);
81 }
82
convertFromInternalInput(void * outputBuffer,int32_t numSamples)83 int32_t FormatConverterBox::convertFromInternalInput(void *outputBuffer, int32_t numSamples) {
84 assert(numSamples <= mMaxSamples);
85 return convert(outputBuffer, numSamples, getInputBuffer());
86 }
87
convert(void * outputBuffer,int32_t numSamples,const void * inputBuffer)88 int32_t FormatConverterBox::convert(void *outputBuffer, int32_t numSamples, const void *inputBuffer) {
89 mSource->setData(inputBuffer, numSamples);
90 return mSink->read(outputBuffer, numSamples);
91 }
92