oboe耳返代码
时间: 2023-07-02 21:17:52 浏览: 61
以下是使用 Oboe 实现耳返功能的示例代码:
```cpp
#include <oboe/Oboe.h>
class EarbackStream : public oboe::AudioStreamCallback {
public:
EarbackStream() {}
oboe::DataCallbackResult onAudioReady(oboe::AudioStream *audioStream, void *audioData,
int32_t numFrames) override {
// 获取输入音频数据
int16_t *inputData = static_cast<int16_t *>(audioData);
// 处理音频数据
// ...
// 将处理后的音频数据输出到耳机或耳麦
oboe::AudioStream *outputStream = getOutputStream();
if (outputStream != nullptr) {
outputStream->write(inputData, numFrames, 0);
}
return oboe::DataCallbackResult::Continue;
}
oboe::AudioStream *getOutputStream() {
if (mOutputStream == nullptr) {
oboe::AudioStreamBuilder builder;
builder.setDirection(oboe::Direction::Output)
.setPerformanceMode(oboe::PerformanceMode::LowLatency)
.setSharingMode(oboe::SharingMode::Exclusive)
.setFormat(oboe::AudioFormat::I16)
.setChannelCount(oboe::ChannelCount::Mono)
.setSampleRate(oboe::SampleRate::Unspecified)
.setCallback(nullptr)
.openManagedStream(mOutputStream);
}
return mOutputStream.get();
}
private:
std::shared_ptr<oboe::AudioStream> mOutputStream;
};
// 启动耳返功能
void startEarback() {
// 创建输入音频流
oboe::AudioStreamBuilder builder;
builder.setDirection(oboe::Direction::Input)
.setPerformanceMode(oboe::PerformanceMode::LowLatency)
.setSharingMode(oboe::SharingMode::Exclusive)
.setFormat(oboe::AudioFormat::I16)
.setChannelCount(oboe::ChannelCount::Mono)
.setSampleRate(oboe::SampleRate::Unspecified)
.setCallback(new EarbackStream())
.openManagedStream(nullptr);
}
// 停止耳返功能
void stopEarback() {
// 关闭音频流
// ...
}
```
以上代码中,`EarbackStream` 类是一个实现了 `oboe::AudioStreamCallback` 接口的音频流回调类,它在 `onAudioReady` 方法中获取输入音频数据,处理后将数据输出到耳机或耳麦中。`getOutputStream` 方法用于创建输出音频流,并返回一个指向该音频流的指针。`startEarback` 函数用于启动耳返功能,它创建一个输入音频流,并设置 `EarbackStream` 类为回调对象;`stopEarback` 函数用于停止耳返功能,它关闭输入和输出音频流。