使用AudioRecord和 AudioTrack实现录音并播放

最新推荐文章于 2024-12-10 00:21:18 发布

session88

最新推荐文章于 2024-12-10 00:21:18 发布

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CC 4.0 BY-SA版权

文章标签： exception thread file null byte path

本文链接：https://blog.youkuaiyun.com/session88/article/details/6401752

本文介绍了一款应用，可以设置参数值（频率、编码格式、声道），实现音视频的录制和播放。应用提供了录制功能，支持创建音频记录、启动线程进行数据写入，并在停止录制时将临时文件复制到指定位置，最终删除临时文件。

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下载地址：http://download.youkuaiyun.com/source/3148521

此应用可以设置参数值：频率、编码格式、声道。

private void startRecording (){

                createAudioRecord();//每次读取设置的参数后再创建

                audioRecord.startRecording();

                isRecording = true;

                recordingThread = new Thread(new Runnable() {

                        @Override
                        public void run() {
                                writeAudioDataToFile();//每次均写入同一文件中
                        }
                },"AudioRecorder Thread");

                recordingThread.start();
        }

private void stopRecording (){
                if(null != audioRecord){
                        isRecording = false;

                        audioRecord.stop();
                        audioRecord.release();

                        audioRecord = null;
                        recordingThread = null;
                }

                copyWaveFile(getTempFilename(),getFilename());
                deleteTempFile();
        }
AudioTrack播放类

class PCMAudioTrack extends Thread {

            protected byte[] m_out_bytes;


            final String FILE_PATH = "/sdcard/AudioRecorder/";
            final String FILE_NAME = "session.wav";

            File file;
            FileInputStream in;

            public void init() {
                try {
                    file = new File(FILE_PATH , FILE_NAME);
                    file.createNewFile();
                    in = new FileInputStream(file);

//                    in.read(temp, 0, length);

                    m_keep_running = true;

                    createAudioTrack();

                    m_out_bytes = new byte[playBufSize];

                } catch (Exception e) {
                    e.printStackTrace();
                }
            }

            public void free() {
                m_keep_running = false;
                try {
                    Thread.sleep(1000);
                } catch (Exception e) {
                    Log.d("sleep exceptions.../n", "");
                }
            }

            public void run() {
                byte[] bytes_pkg = null;
                audioTrack.play();
                while (m_keep_running) {
                    try {
                        in.read(m_out_bytes);
                        bytes_pkg = m_out_bytes.clone();
                        audioTrack.write(bytes_pkg, 0, bytes_pkg.length);
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                }

                audioTrack.stop();
                audioTrack = null;
                try {
                    in.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }