audio_openSL | open SL audio - form https : //audioprograming

audio_openSL is a C library. audio_openSL has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

form 老外的代码提供的功能真的不错，看看代码就知道了 opensl_io.h 用到的主要的四个函数 分别是 打开/关闭android 音频设备 写入音频数据和读取音频数据 看c 代码之前,关于指针的几个小知识点需要先温习一下下 /** needs know. /* Open the audio device with a given sampling rate (sr), input and output channels and IO buffer size in frames. Returns a handle to the OpenSL stream / OPENSL_STREAM android_OpenAudioDevice(int sr, int inchannels, int outchannels, int bufferframes); /* Close the audio device */ void android_CloseAudioDevice(OPENSL_STREAM p); / Read a buffer from the OpenSL stream *p, of size samples. Returns the number of samples read. */ int android_AudioIn(OPENSL_STREAM *p, float buffer,int size); / Write a buffer to the OpenSL stream *p, of size samples. Returns the number of samples written. */ int android_AudioOut(OPENSL_STREAM *p, float *buffer,int size);. 需要注意的是,播放和录制audio需要在子线程里运行,我使用的是 HandlerThread 只是使用了一个文件 opensl_io.c 和 opensl_io.h 原作者有三个文件 opensl_io.c opensl_io2.c 和 opensl_io3.c opensl_io.c 是使用线程锁来控制录制和播放 opensl_io2.c 使用 google 推荐的 回调 SLAndroidSimpleBufferQueueItf opensl_io3.c 也是使用回调,不过播放回调包含了audio信息.