我有一个记录pcm文件并保存的程序。该文件的路径存储在名为import pygame
pygame.init()
pygame.mixer.init()
sound = pygame.mixer.music.load('sound.wav')
def playSound():
sound.pause()
sound.play()
while True:
pass
的变量中。我想更改此代码，以使其在无缝循环中播放PCM文件，直到线程停止（通过将pcmFile更改为false）。
我有一个isPlaying课，像这样：
AudioManager这里的重要部分是public class AudioManager {
static final String TAG = "AudioRecorder";
boolean isPlaying = false;
static final int frequency = 16000;
private static final String AUDIO_RECORDER_FOLDER = "4TRACK";
static final int channelConfiguration = AudioFormat.CHANNEL_CONFIGURATION_MONO;
static final int audioEncoding = AudioFormat.ENCODING_PCM_16BIT;
int playBufSize;
AudioTrack audioTrack;
String filename;
File pcmFile;
public AudioManager() {
playBufSize=AudioTrack.getMinBufferSize(frequency,
channelConfiguration, audioEncoding);
audioTrack = new AudioTrack(android.media.AudioManager.STREAM_MUSIC, frequency,
channelConfiguration, audioEncoding,
playBufSize, AudioTrack.MODE_STREAM);
audioTrack.setStereoVolume(0.7f, 0.7f);
}
public void startPlaying() {
isPlaying = true;
new PlayThread().start();
}
public void stopPlaying() {
isPlaying = false;
}
private String getFilename(){
String filepath = Environment.getExternalStorageDirectory().getPath();
File file = new File(filepath,AUDIO_RECORDER_FOLDER);
return (file.getAbsolutePath() + "/" + filename + ".pcm");
}
class PlayThread extends Thread {
public void run() {
try {
System.out.println("~~Playing audio");
byte[] buffer = new byte[playBufSize];
BufferedInputStream bis = new BufferedInputStream(new FileInputStream(pcmFile), playBufSize);
audioTrack.play();
int readSize = -1;
while (isPlaying && (readSize = bis.read(buffer)) != -1) {
audioTrack.write(buffer, 0, readSize);
}
audioTrack.stop();
MainActivity main = (MainActivity) ctx;
main.audioStopped();
System.out.println("~~No longer playing");
bis.close();
} catch (Throwable t) {
t.printStackTrace();
}
}
}
}
类。现在，它可以完美播放pcm文件。如何调整此代码，使其循环播放PCM文件？
答案 0 :(得分：0)
我可以看到您正在从main.audioStopped调用MainActivity函数，该函数通知媒体我想停止播放了。您可以通过audioStopped的{{1}}函数轻松地处理重复。
我对MainActivity类进行了如下修改。其中包含AudioManager和context的音频，这些音频需要在构造函数中播放。这有助于您从fileName创建AudioManager的实例，因此，当音频播放完毕后，您可以重新开始音频。
MainActivity然后从public class AudioManager {
static final String TAG = "AudioRecorder";
Context ctx;
public static boolean isPlaying = false;
static final int frequency = 16000;
private static final String AUDIO_RECORDER_FOLDER = "4TRACK";
static final int channelConfiguration = AudioFormat.CHANNEL_CONFIGURATION_MONO;
static final int audioEncoding = AudioFormat.ENCODING_PCM_16BIT;
int playBufSize;
AudioTrack audioTrack;
String filename;
File pcmFile;
public AudioManager(Context ctx, String fileName) {
this.ctx = ctx;
this.filename = fileName;
playBufSize = AudioTrack.getMinBufferSize(frequency,
channelConfiguration, audioEncoding);
audioTrack = new AudioTrack(android.media.AudioManager.STREAM_MUSIC, frequency,
channelConfiguration, audioEncoding,
playBufSize, AudioTrack.MODE_STREAM);
audioTrack.setStereoVolume(0.7f, 0.7f);
startPlaying();
}
public void startPlaying() {
isPlaying = true;
new PlayThread().start();
}
private String getFilename() {
String filepath = Environment.getExternalStorageDirectory().getPath();
File file = new File(filepath, AUDIO_RECORDER_FOLDER);
return file.getAbsolutePath() + "/" + filename + ".pcm";
}
class PlayThread extends Thread {
public void run() {
try {
System.out.println("~~Playing audio");
byte[] buffer = new byte[playBufSize];
BufferedInputStream bis = new BufferedInputStream(new FileInputStream(getFilename()), playBufSize);
audioTrack.play();
int readSize = -1;
while (isPlaying && (readSize = bis.read(buffer)) != -1) {
audioTrack.write(buffer, 0, readSize);
}
audioTrack.stop();
MainActivity main = (MainActivity) ctx;
main.audioStopped();
System.out.println("~~No longer playing");
bis.close();
} catch (Throwable t) {
t.printStackTrace();
}
}
}
}
开始检查MainActivity的值，并在找到isPlaying时重复启动线程。
true希望有帮助！