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;
}
}
Sử dụng các điều khoản sau đây trong 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" />
Nguồn
2015-05-19 09:04:33
Bạn giải quyết vấn đề đó. Đối với vấn đề của bạn, tôi đã kiểm tra và nó có thể ghi lại. Tuy nhiên, nếu tôi thay đổi kiểu trực quan như circlerenderer. Nó không hoạt động. Bạn có cùng một vấn đề? – Jame