Android 音轨不工作,没有声音
你能检查一下为什么我的音轨不工作吗?我有一个音轨的缓冲区,它应该可以工作Android 音轨不工作,没有声音,android,codec,android-mediacodec,audiotrack,input-buffer,Android,Codec,Android Mediacodec,Audiotrack,Input Buffer,你能检查一下为什么我的音轨不工作吗?我有一个音轨的缓冲区,它应该可以工作 public class MainActivity extends AppCompatActivity { private MediaExtractor extractor; private MediaCodec decoder; private Surface surface; private byte[] b; AudioManager audioManager; @Override protected void
public class MainActivity extends AppCompatActivity {
private MediaExtractor extractor;
private MediaCodec decoder;
private Surface surface;
private byte[] b;
AudioManager audioManager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button button = (Button)findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
run();
}
});
}
public void run() {
extractor = new MediaExtractor();
AssetFileDescriptor sampleFD = getResources().openRawResourceFd(R.raw.pinkfloyd);
try {
extractor.setDataSource(sampleFD.getFileDescriptor(), sampleFD.getStartOffset(), sampleFD.getLength());
} catch (IOException e) {
e.printStackTrace();
}
for (int i = 0; i < extractor.getTrackCount(); i++) {
MediaFormat format = extractor.getTrackFormat(i);
String mime = format.getString(MediaFormat.KEY_MIME);
if (mime.startsWith("audio/")) {
extractor.selectTrack(i);
try {
decoder = MediaCodec.createDecoderByType(mime);
} catch (IOException e) {
e.printStackTrace();
}
decoder.configure(format, surface, null, 0);
break;
}
}
if (decoder == null) {
Log.e("DecodeActivity", "Can't find video info!");
return;
}
decoder.start();
ByteBuffer inputBuffers [] = decoder.getInputBuffers();
ByteBuffer outputBuffers [] = decoder.getOutputBuffers();
audioManager = (AudioManager) this.getSystemService(Context.AUDIO_SERVICE);
audioManager.setMode(AudioManager.MODE_CURRENT);
audioManager.setStreamVolume(AudioManager.STREAM_MUSIC, audioManager.getStreamMaxVolume(AudioManager.STREAM_MUSIC), 0);
int lengthOfAudioClip = outputBuffers.length;
AudioTrack audioTrack = new AudioTrack(AudioManager.STREAM_MUSIC, 44100, AudioFormat.CHANNEL_OUT_STEREO, AudioFormat.ENCODING_PCM_16BIT, lengthOfAudioClip, AudioTrack.MODE_STREAM);
MediaCodec.BufferInfo info = new MediaCodec.BufferInfo();
audioTrack.play();
boolean isEOS = false;
while (!Thread.interrupted()) {
if (!isEOS) {
int inIndex = decoder.dequeueInputBuffer(10000);
if (inIndex >= 0) {
ByteBuffer buffer = inputBuffers[inIndex];
decoder.getInputBuffer(inIndex);
int sampleSize = extractor.readSampleData(buffer, 0);
if (sampleSize < 0) {
Log.d("DecodeActivity", "InputBuffer BUFFER_FLAG_END_OF_STREAM");
decoder.queueInputBuffer(inIndex, 0, 0, 0, MediaCodec.BUFFER_FLAG_END_OF_STREAM);
isEOS = true;
} else {
decoder.queueInputBuffer(inIndex, 0, sampleSize, extractor.getSampleTime(), 0);
extractor.advance();
}
}
}
int outIndex = decoder.dequeueOutputBuffer(info, 10000);
switch (outIndex)
{
case MediaCodec.INFO_OUTPUT_FORMAT_CHANGED:
Log.d("DecodeActivity", "New format " + decoder.getOutputFormat());
break;
case MediaCodec.INFO_TRY_AGAIN_LATER:
Log.d("DecodeActivity", "dequeueOutputBuffer timed out!");
break;
default:
ByteBuffer buffer = outputBuffers[outIndex];
Log.v("DecodeActivity", "We can't use this buffer but render it due to the API limit, " + buffer);
b = new byte[info.size-info.offset];
Log.d("LOGGING FOR B", b + "");
audioTrack.write(b, 0, outputBuffers.length);
decoder.releaseOutputBuffer(outIndex, true);
Log.d("LOGGING FOREST KEEP OUT", outIndex + "");
Log.d("LOG STATE", audioTrack.getState() + "");
Log.d("LOG STREAMTYPE", audioTrack.getStreamType() + "");
break;
}
if ((info.flags & MediaCodec.BUFFER_FLAG_END_OF_STREAM) != 0) {
Log.d("DecodeActivity", "OutputBuffer BUFFER_FLAG_END_OF_STREAM");
audioTrack.flush();
audioTrack.release();
break;
}
}
Log.d("LOGGING FOR INPUT", inputBuffers + "");
Log.d("LOGGING FOR OUTPUT", outputBuffers + "");
Log.d("OUTLENGTH", outputBuffers.length + "");
Log.d("SIZE OF B", b.length + "");
// AudioTrack audioTrack = new AudioTrack(AudioManager.STREAM_MUSIC, 44100, AudioFormat.CHANNEL_OUT_STEREO, AudioFormat.ENCODING_PCM_16BIT, 44100, AudioTrack.MODE_STREAM);
// audioTrack.getSampleRate();
decoder.stop();
decoder.release();
extractor.release();
}
}
public类MainActivity扩展了AppCompatActivity{
专用媒体提取器;
专用媒体编解码器;
私人表面;
专用字节[]b;
AudioManager AudioManager;
@凌驾
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button Button=(Button)findViewById(R.id.Button);
setOnClickListener(新视图.OnClickListener(){
@凌驾
公共void onClick(视图v){
run();
}
});
}
公开募捐{
提取器=新的媒体提取器();
AssetFileDescriptor sampleFD=getResources().openRawResourceFd(R.raw.pinkfloyd);
试一试{
setDataSource(sampleFD.getFileDescriptor(),sampleFD.getStartOffset(),sampleFD.getLength());
}捕获(IOE异常){
e、 printStackTrace();
}
for(int i=0;i=0){
ByteBuffer buffer=inputBuffers[inIndex];
解码器.getInputBuffer(inIndex);
int sampleSize=extractor.readSampleData(缓冲区,0);
如果(样本大小<0){
Log.d(“DecodeActivity”,“InputBuffer BUFFER\u FLAG\u END\u OF_STREAM”);
解码器.queueInputBuffer(inIndex,0,0,0,MediaCodec.BUFFER\u标志\u结束\u流);
isEOS=真;
}否则{
decoder.queueInputBuffer(inIndex,0,sampleSize,提取器.getSampleTime(),0);
提取器;
}
}
}
int OUTIDEX=解码器.dequeueOutputBuffer(信息,10000);
交换机(OUTIDEX)
{
案例MediaCodec.INFO\u输出\u格式\u已更改:
Log.d(“DecodeActivity”,“新格式”+decoder.getOutputFormat());
打破
case MediaCodec.INFO\u请稍后再试:
Log.d(“DecodeActivity”,“dequeueOutputBuffer超时!”);
打破
违约:
ByteBuffer缓冲区=输出缓冲区[outIndex];
Log.v(“DecodeActivity”,“我们不能使用此缓冲区,但由于API限制而呈现它,”+缓冲区);
b=新字节[信息大小信息偏移];
Log.d(“B的日志记录”,B+);
audioTrack.write(b,0,outputBuffers.length);
解码器.releaseOutputBuffer(outIndex,true);
Log.d(“森林禁伐”,outinex+);
Log.d(“日志状态”,audioTrack.getState()+”);
Log.d(“Log STREAMTYPE”,audioTrack.getStreamType()+”);
打破
}
if((流的info.flags和MediaCodec.BUFFER\u FLAG\u END)!=0){
Log.d(“解码活动”,“输出缓冲缓冲区缓冲区标志\u结束\u流”);
audioTrack.flush();
audioTrack.release();
打破
}
}
d(“记录输入”,inputBuffers+”);
d(“记录输出”,outputBuffers+”);
Log.d(“OUTLENGTH”,outputBuffers.length+”);
Log.d(“B的大小”,B.length+”);
//AudioTrack AudioTrack=新的AudioTrack(AudioManager.STREAM\u MUSIC,44100,AudioFormat.CHANNEL\u OUT\u立体声,AudioFormat.ENCODING\u PCM\u 16位,44100,AudioTrack.MODE\u STREAM);
//audioTrack.getSampleRate();
解码器。停止();
decoder.release();
提取器。释放();
}
}
您可以轻松地尝试:
MediaPlayer mPlayer = MediaPlayer.create(ThisActivity.this, R.raw.mysoundfile);
mPlayer.start();
当活动被破坏时,不要忘记停止:
public void onDestroy() {
mPlayer.stop();
super.onDestroy();
}
有关更多参数,请参阅此旧帖子:
您可以轻松尝试:
MediaPlayer mPlayer = MediaPlayer.create(ThisActivity.this, R.raw.mysoundfile);
mPlayer.start();
当活动被破坏时,不要忘记停止:
public void onDestroy() {
mPlayer.stop();
super.onDestroy();
}
有关更多参数,请参阅此旧帖子:
当您将字节[]b写入音频曲目时,它似乎为空。您可以像这样填充字节[]b
buffer.get(b, 0, info.size-info.offset);
在将其写入音频曲目之前当您将其写入音频曲目时,字节[]b似乎为空。您可以像这样填充字节[]b
buffer.get(b, 0, info.size-info.offset);
在将其写入AudioTrack之前