我在我的 Android 应用程序中实现了录制音频的功能。我的应用程序在 Linux 上运行良好。但是当我在 mac osx 中运行相同的应用程序并录制音频时，它会崩溃我的应用程序。
private AudioRecordingThread recordingThread;
recordingThread = new AudioRecordingThread(fileName,
new AudioRecordingHandler() {
@Override
public void onFftDataCapture(final byte[] bytes) {
runOnUiThread(new Runnable() {
public void run() {
if (visualizerView != null) {
visualizerView.updateVisualizerFFT(bytes);
}
}
});
}
@Override
public void onRecordSuccess() {
}
@Override
public void onRecordingError() {
runOnUiThread(new Runnable() {
public void run() {
recordStop();
NotificationUtils.showInfoDialog(
ActivityCropImage.this,
"Error in saving");
}
});
}
@Override
public void onRecordSaveError() {
runOnUiThread(new Runnable() {
public void run() {
recordStop();
NotificationUtils.showInfoDialog(
ActivityCropImage.this,
"Error in recording");
}
});
}
});
PcmAudioHelper.convertRawToWav(WavAudioFormat.mono16Bit(SAMPLING_RATE), file_raw, file_wav);
这是我的应用程序崩溃的代码行。我用过https://github.com/steelkiwi/AndroidRecording我项目中的库。
最佳答案
package com.record.util;
import android.media.AudioFormat;
import android.media.AudioRecord;
import android.media.MediaRecorder;
import android.os.Environment;
import android.text.format.Time;
import android.util.Log;
import java.io.BufferedOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
public class RecordWavMaster {
private static final int samplingRates[] = {16000, 11025, 11000, 8000, 6000};
public static int SAMPLE_RATE = 16000;
private AudioRecord mRecorder;
private File mRecording;
private short[] mBuffer;
private String audioFilePath;
private boolean mIsRecording = false;
private String RECORD_WAV_PATH = Environment.getExternalStorageDirectory() + File.separator + "AudioRecord";
/* Initializing AudioRecording MIC */
public RecordWavMaster() {
initRecorder();
}
/* Get Supported Sample Rate */
public static int getValidSampleRates() {
for (int rate : samplingRates) {
int bufferSize = AudioRecord.getMinBufferSize(rate, AudioFormat.CHANNEL_CONFIGURATION_DEFAULT, AudioFormat.ENCODING_PCM_16BIT);
if (bufferSize > 0) {
return rate;
}
}
return SAMPLE_RATE;
}
/* Start AudioRecording */
public void recordWavStart() {
mIsRecording = true;
mRecorder.startRecording();
mRecording = getFile("raw");
startBufferedWrite(mRecording);
}
/* Stop AudioRecording */
public String recordWavStop() {
try {
mIsRecording = false;
mRecorder.stop();
File waveFile = getFile("wav");
rawToWave(mRecording, waveFile);
Log.e("path_audioFilePath",audioFilePath);
return audioFilePath;
} catch (Exception e) {
Log.e("Error saving file : ", e.getMessage());
}
return null;
}
/* Release device MIC */
public void releaseRecord() {
mRecorder.release();
}
/* Initializing AudioRecording MIC */
private void initRecorder() {
SAMPLE_RATE = getValidSampleRates();
int bufferSize = AudioRecord.getMinBufferSize(SAMPLE_RATE, AudioFormat.CHANNEL_IN_MONO,
AudioFormat.ENCODING_PCM_16BIT);
mBuffer = new short[bufferSize];
mRecorder = new AudioRecord(MediaRecorder.AudioSource.MIC, SAMPLE_RATE, AudioFormat.CHANNEL_IN_MONO,
AudioFormat.ENCODING_PCM_16BIT, bufferSize);
new File(RECORD_WAV_PATH).mkdir();
}
/* Writing RAW file */
private void startBufferedWrite(final File file) {
new Thread(new Runnable() {
@Override
public void run() {
DataOutputStream output = null;
try {
output = new DataOutputStream(new BufferedOutputStream(new FileOutputStream(file)));
while (mIsRecording) {
double sum = 0;
int readSize = mRecorder.read(mBuffer, 0, mBuffer.length);
for (int i = 0; i < readSize; i++) {
output.writeShort(mBuffer[i]);
sum += mBuffer[i] * mBuffer[i];
}
if (readSize > 0) {
final double amplitude = sum / readSize;
}
}
} catch (IOException e) {
Log.e("Error writing file : ", e.getMessage());
} finally {
if (output != null) {
try {
output.flush();
} catch (IOException e) {
Log.e("Error writing file : ", e.getMessage());
} finally {
try {
output.close();
} catch (IOException e) {
Log.e("Error writing file : ", e.getMessage());
}
}
}
}
}
}).start();
}
/* Converting RAW format To WAV Format*/
private void rawToWave(final File rawFile, final File waveFile) throws IOException {
byte[] rawData = new byte[(int) rawFile.length()];
DataInputStream input = null;
try {
input = new DataInputStream(new FileInputStream(rawFile));
input.read(rawData);
} finally {
if (input != null) {
input.close();
}
}
DataOutputStream output = null;
try {
output = new DataOutputStream(new FileOutputStream(waveFile));
// WAVE header
writeString(output, "RIFF"); // chunk id
writeInt(output, 36 + rawData.length); // chunk size
writeString(output, "WAVE"); // format
writeString(output, "fmt "); // subchunk 1 id
writeInt(output, 16); // subchunk 1 size
writeShort(output, (short) 1); // audio format (1 = PCM)
writeShort(output, (short) 1); // number of channels
writeInt(output, SAMPLE_RATE); // sample rate
writeInt(output, SAMPLE_RATE * 2); // byte rate
writeShort(output, (short) 2); // block align
writeShort(output, (short) 16); // bits per sample
writeString(output, "data"); // subchunk 2 id
writeInt(output, rawData.length); // subchunk 2 size
// Audio data (conversion big endian -> little endian)
short[] shorts = new short[rawData.length / 2];
ByteBuffer.wrap(rawData).order(ByteOrder.LITTLE_ENDIAN).asShortBuffer().get(shorts);
ByteBuffer bytes = ByteBuffer.allocate(shorts.length * 2);
for (short s : shorts) {
bytes.putShort(s);
}
output.write(bytes.array());
} finally {
if (output != null) {
output.close();
rawFile.delete();
}
}
}
/* Get file name */
private File getFile(final String suffix) {
Time time = new Time();
time.setToNow();
audioFilePath = time.format("%Y%m%d%H%M%S");
return new File(RECORD_WAV_PATH, time.format("%Y%m%d%H%M%S") + "." + suffix);
}
private void writeInt(final DataOutputStream output, final int value) throws IOException {
output.write(value >> 0);
output.write(value >> 8);
output.write(value >> 16);
output.write(value >> 24);
}
private void writeShort(final DataOutputStream output, final short value) throws IOException {
output.write(value >> 0);
output.write(value >> 8);
}
private void writeString(final DataOutputStream output, final String value) throws IOException {
for (int i = 0; i < value.length(); i++) {
output.write(value.charAt(i));
}
}
public String getFileName (final String time_suffix) {
return (RECORD_WAV_PATH+time_suffix+ "." + "wav");
}
public Boolean getRecordingState () {
if( mRecorder.getRecordingState() == AudioRecord.RECORDSTATE_STOPPED) {
return false;
}
return true;
}
}
Use the following permissions in manifest
<!--Permission record-->
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
关于Android - 如何将音频的原始数据转换为 wav？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/30319193/