/*
* Write audio data into WAV file when recorder buffer overflows.
*/
private void writeToFile() {
int readCode = 0;
byte[] audioData = new byte[RECORDER_BUFFER_SIZE];
BufferedOutputStream outputStream = null;
try {
outputStream = new BufferedOutputStream(new FileOutputStream(filePath, true));
while (isRecording) {
readCode = recorder.read(audioData, 0, RECORDER_BUFFER_SIZE);
if (readCode != AudioRecord.ERROR_INVALID_OPERATION) {
try {
outputStream.write(audioData);
// increment fileSize by buffer size
fileSize += RECORDER_BUFFER_SIZE;
} catch (IOException e) {
Log.e("Microphone", "Error writing audio data to file.");
}
}
}
} catch (FileNotFoundException e) {
Log.e("Microphone", "Output file not found.");
}
if (outputStream != null) {
try {
outputStream.close();
} catch (IOException e) {
Log.e("Microphone", "Error closing audiowriter.");
}
}
}
public void run() {
super.run();
ar.startRecording();
// 用于读取的 buffer
byte[] buffer = new byte[bs];
isRun = true;
while (isRun) {
int r = ar.read(buffer, 0, bs);
int v = 0;
// 将 buffer 内容取出，进行平方和运算
for (int i = 0; i < buffer.length; i++) {
// 这里没有做运算的优化，为了更加清晰的展示代码
v += buffer[i] * buffer[i];
// v += (buffer[i] << 1);
}
// 平方和除以数据总长度，得到音量大小。可以获取白噪声值，然后对实际采样进行标准化。
// 如果想利用这个数值进行操作，建议用 sendMessage 将其抛出，在 Handler 里进行处理。
// Log.d("spl", String.valueOf(v / (float) r));
value = v / (float) r;
// value = (int) (Math.abs((int)(v /(float)r)/10000) >> 1);
dB = 10 * Math.log10(v / (double) r);
// MainActivity.SetText(value,dB);
Log.d("Data:", String.valueOf(value) + " " + String.valueOf(dB));
handler.post(
new Runnable() {
@Override
public void run() {
SetText(value, dB);
}
});
}
ar.stop();
}
@Override
public void read(short[] samples, int offset, int numSamples) {
int read = 0;
while (read != numSamples) {
read += recorder.read(samples, offset + read, numSamples - read);
}
}
protected StampedAudio readMic() {
StampedAudio stampedAudio = null;
if (_mic != null) {
int timestamp = getOutboundTimestamp();
// read is blocking.
int bufferRead = _mic.read(_micFramebuff, 0, _micFramebuff.length);
Log.verb(
this.getClass().getSimpleName()
+ ".readMic(): length="
+ _micFramebuff.length
+ ", bufferRead="
+ bufferRead);
short[] sframe = _micFramebuff;
// short[] seframe = effectIn(sframe);
byte[] tbuff = _encoder.encode_frame(sframe);
if (tbuff != null) {
stampedAudio = _audio.getCleanStampedAudio();
stampedAudio.setStampAndBytes(tbuff, 0, tbuff.length, timestamp);
_audio.saveReadStampedAudio(stampedAudio);
_countFrames++;
}
}
return stampedAudio;
}
private void analyze() {
for (int i = 0; i < samplingRates.length; i++) {
int minSize =
AudioRecord.getMinBufferSize(
samplingRates[i],
AudioFormat.CHANNEL_CONFIGURATION_MONO,
AudioFormat.ENCODING_PCM_16BIT); // 获取允许的最小缓冲区大小
AudioRecord ar =
new AudioRecord(
MediaRecorder.AudioSource.MIC,
samplingRates[i],
AudioFormat.CHANNEL_CONFIGURATION_MONO,
AudioFormat.ENCODING_PCM_16BIT,
minSize);
if (ar.getState() == AudioRecord.STATE_INITIALIZED) {
short[] buff = new short[minSize];
ar.startRecording();
while (recording) {
ar.read(buff, 0, minSize); // 将音频数据从硬件读入缓冲区内
for (short s : buff) {
if (Math.abs(s) > minVolume) { // 当该平率的音量超过阈值时，向handler发送一条message
handler.sendEmptyMessage(0);
}
}
}
ar.stop();
i = samplingRates.length;
}
ar.release();
ar = null;
}
}
public void onPeriodicNotification(AudioRecord recorder) {
audioRecorder.read(buffer, 0, buffer.length); // Fill buffer
try {
randomAccessWriter.write(buffer); // Write buffer to file
payloadSize += buffer.length;
if (bSamples == 16) {
for (int i = 0; i < buffer.length / 2; i++) { // 16bit sample size
short curSample = getShort(buffer[i * 2], buffer[i * 2 + 1]);
if (curSample > cAmplitude) { // Check amplitude
cAmplitude = curSample;
}
}
} else { // 8bit sample size
for (int i = 0; i < buffer.length; i++) {
if (buffer[i] > cAmplitude) { // Check amplitude
cAmplitude = buffer[i];
}
}
}
} catch (IOException e) {
Log.e(
ExtAudioRecorder.class.getName(),
"Error occured in updateListener, recording is aborted");
// stop();
}
}
public void run() {
// start the encoder
encoder.startEncoding();
try {
audioRecord.startRecording();
} catch (IllegalStateException e) {
this.isRecording = false;
return;
}
this.isRecording = true;
while (isRecording) {
bufferRead = audioRecord.read(samples, 0, bufferSize);
if (bufferRead > 0) {
// add the data to the encoder
encoder.addData(samples, bufferRead);
}
try {
Thread.sleep(20);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
audioRecord.stop();
encoder.stopEncoding();
}
public void run() {
android.os.Process.setThreadPriority(android.os.Process.THREAD_PRIORITY_AUDIO);
byte[] buffer = new byte[BUFFER_SIZE];
DatagramPacket packet;
try {
int minBuf = AudioRecord.getMinBufferSize(sampleRate, channelConfig, audioFormat);
recorder =
new AudioRecord(
MediaRecorder.AudioSource.MIC, sampleRate, channelConfig, audioFormat, minBuf);
recorder.startRecording();
} catch (Exception ex) {
// TODO: handle this exception
}
while (recordAudio) {
try {
recorder.read(buffer, 0, buffer.length);
packet = new DatagramPacket(buffer, buffer.length, InetAddress.getByName(_server), _port);
socket.send(packet);
} catch (Exception ex) {
// TODO: handle this exception
}
}
buffer = null;
}
@Override
protected Void doInBackground(Void... params) {
int bufferSize = AudioRecord.getMinBufferSize(frequency, channelConfiguration, audioEncoding);
AudioRecord audioRecord =
new AudioRecord(
controller.getAudioSource(),
frequency,
channelConfiguration,
audioEncoding,
bufferSize);
try {
short[] buffer = new short[blockSize];
audioRecord.startRecording();
while (controller.isStarted()) {
int bufferReadSize = audioRecord.read(buffer, 0, blockSize);
DataBlock dataBlock = new DataBlock(buffer, blockSize, bufferReadSize);
blockingQueue.put(dataBlock);
}
} catch (Throwable t) {
// Log.e("AudioRecord", "Recording Failed");
}
audioRecord.stop();
return null;
}
private void writeAudioDataToFile() {
byte data[] = new byte[bufferSize];
String filename = getTempFilename();
FileOutputStream os = null;
try {
os = new FileOutputStream(filename);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
Log.d("SAN", e.getMessage());
}
int read = 0;
if (null != os) {
while (isRecording) {
read = recorder.read(data, 0, bufferSize);
if (AudioRecord.ERROR_INVALID_OPERATION != read) {
try {
os.write(data);
} catch (IOException e) {
Log.d("SAN", e.getMessage());
}
}
}
try {
os.close();
} catch (IOException e) {
Log.d("SAN", e.getMessage());
}
}
}
public void run() {
synchronized (this) {
if (!mPlay || mParams == null) {
return;
}
mRunning = true;
}
int trackBufSize =
android.media.AudioTrack.getMinBufferSize(mParams.rate, mParams.outch, mParams.encoding);
AudioTrack track =
new AudioTrack(
AudioManager.STREAM_VOICE_CALL,
mParams.rate,
mParams.outch,
mParams.encoding,
trackBufSize,
AudioTrack.MODE_STREAM);
track.play();
appendLogTextView(mHandler, "play playback ok.\n");
if (mParams.source == AUDIO_SOURCE_WAVE_FILE) {
// Log.d("sakalog", "play " + mParams.wavefile);
// WaveDataInputStream wavein = new WaveDataInputStream(mParams.wavefile);
Log.d("sakalog", "play " + mResources.getResourceName(mParams.waveid));
WaveDataInputStream wavein = new WaveDataInputStream(mParams.waveid);
byte[] wave = new byte[512];
int size = wavein.read(wave, wave.length);
track.write(wave, 0, size);
while (mPlay && ((size = wavein.read(wave, wave.length)) > -1)) {
track.write(wave, 0, size);
}
wavein.close();
} else {
Log.d("sakalog", "play ");
AudioRecord record = startMicRecording(mParams.rate, mParams.inch, mParams.encoding);
byte[] buf = new byte[trackBufSize];
while (mPlay) {
int size = record.read(buf, 0, buf.length);
track.write(buf, 0, size);
}
stopMicRecording(record);
}
track.stop();
track.release();
appendLogTextView(mHandler, "stop playback ok.\n");
synchronized (this) {
mPlay = false;
mRunning = false;
}
}
private boolean readData(byte[] buffer, final int bytesToRead) {
int bytesRead = 0;
int missingBytes = bytesToRead;
while (running.get()) {
int result = audioRecord.read(buffer, bytesRead, missingBytes);
if (result < 0) break;
bytesRead += result;
missingBytes -= result;
if (missingBytes == 0) return true;
}
return false;
}
@Override
public void run() {
android.os.Process.setThreadPriority(android.os.Process.THREAD_PRIORITY_URGENT_AUDIO);
Modulation.initDecoder(); // init demodulator
Modulation.initProcess();
recdata = new short[recBufSize / 2];
while (!Thread.interrupted() && !mStopRecording) {
if (recorder == null) {
break;
}
nread = recorder.read(recdata, 0, recBufSize / 2);
if (nread > 0) {
retval = Modulation.process(recdata, nread);
if (retval == 2) {
String str = "";
byte[] result = Modulation.getResult();
try {
str = new String(result, "UTF-8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
if (mStopRecording) {
continue;
}
Message msg = mHandler.obtainMessage();
msg.what = mEventId;
msg.obj = str;
mHandler.sendMessage(msg);
try {
// when receive a message, sleep a little while;
// so the main thread has a chance to stop recording immediately
Thread.sleep(200);
} catch (InterruptedException e) {
continue;
}
}
}
}
try {
recorder.stop();
recorder.release();
} catch (Exception e) {
e.printStackTrace();
}
recorder = null;
Modulation.releaseDecoder();
}
@Override
public void run() {
while (state == AcommsInterface.RUNNING) {
int size = audioRecord.read(readBuffer, 0, readBuffer.length);
if (AudioRecord.ERROR_INVALID_OPERATION != size) {
audio_state = AcommsInterface.RUNNING;
short[] datas = new short[size];
System.arraycopy(readBuffer, 0, datas, 0, size);
acomms.writeRecog(datas);
} else {
audio_state = AcommsInterface.INITIALLING_FAILE;
}
}
}
private void StartSendAudio() {
// 8Khz 16bit 采样, iLBC 20ms encoder/decoder; iLbcEncSize=320byte
int bytesRecord = 0, bytesEncoded = 0;
long t_capture = 0;
long t_process = 0;
long delay = 0;
short[] ecBuffer = new short[iLbcEncSize / 2];
short[] outBuffer = new short[iLbcEncSize / 2];
byte[] pcmOut = new byte[iLbcEncSize];
byte[] samples = new byte[iLbcEncSize];
byte[] data = new byte[iLbcDecsize];
while (isRecording == true) {
// gp 有新生成文件标记时，生成新文件。
if (newFileFLag == true) {
newFileFLag = false;
new File(soundFNameString);
try {
braf = new RandomAccessFile(soundFNameString, "rw");
} catch (FileNotFoundException e) {
e.printStackTrace();
}
}
if (braf == null) // null时，什么也不做但是循环继续
continue;
t_capture = (new Date()).getTime();
bytesRecord = audioRecord.read(samples, 0, iLbcEncSize);
ByteBuffer.wrap(samples).order(ByteOrder.LITTLE_ENDIAN).asShortBuffer().get(ecBuffer);
t_process = (new Date()).getTime();
delay = (t_process - t_capture) + m_aecm.recvDelay; // 在类中多定义了一个变量
try {
m_aecm.echoCancellation(
ecBuffer, null, outBuffer, (short) (iLbcEncSize / 2), (short) (delay + 40));
} catch (Exception e1) {
e1.printStackTrace();
}
if (AudioRecord.ERROR_INVALID_OPERATION != bytesRecord) {
ByteBuffer.wrap(pcmOut).order(ByteOrder.LITTLE_ENDIAN).asShortBuffer().put(outBuffer);
bytesEncoded = AudioCodec.iLbcencode(pcmOut, 0, bytesRecord, data, 0);
try {
braf.write(data, 0, bytesEncoded);
} catch (IOException e) {
e.printStackTrace();
}
}
AudioCodec.iMVRSleepMS(10);
}
braf = null;
soundFNameString = null;
newFileFLag = false;
}
@Override
public void run() {
// dane z mikrofonu w formacie pcm
short data[];
// rozmiar bufora
int bufferSize;
// ilosc przeciec z osia czasu
int zeroCrossings;
bufferSize = AudioRecord.getMinBufferSize(SAMPLE_RATE, AudioFormat.CHANNEL_IN_MONO, ENCODING);
recorder =
new AudioRecord(
AudioSource.MIC, SAMPLE_RATE, AudioFormat.CHANNEL_IN_MONO, ENCODING, bufferSize);
data = new short[bufferSize];
recording = true;
while (recording) {
// sprawdzanie, czy nagrywanie zainicjowane
if (recorder.getState() == android.media.AudioRecord.STATE_INITIALIZED) {
// sprawdzanie, czy nagrywanie jest w toku
if (recorder.getRecordingState() == android.media.AudioRecord.RECORDSTATE_STOPPED)
recorder.startRecording();
// gdy nagrywanie jest w toku
else {
// czytanie danych z mikrofonu
recorder.read(data, 0, bufferSize);
zeroCrossings = 0;
// zliczanie przeciec z osia czasu
for (int i = 0; i < bufferSize - 1; i++) {
if (data[i] > 0 && data[i + 1] <= 0) zeroCrossings++;
if (data[i] < 0 && data[i + 1] >= 0) zeroCrossings++;
}
frequency = SAMPLE_RATE * zeroCrossings / bufferSize;
}
}
}
// przerwanie nagrywania
if (recorder.getState() == android.media.AudioRecord.RECORDSTATE_RECORDING) recorder.stop();
recorder.release();
recorder = null;
}
/** Starts the recording, and sets the state to RECORDING. Call after prepare(). */
public void start() {
if (state == State.READY) {
if (rUncompressed) {
payloadSize = 0;
audioRecorder.startRecording();
audioRecorder.read(buffer, 0, buffer.length);
} else {
mediaRecorder.start();
}
state = State.RECORDING;
} else {
Log.e(ExtAudioRecorder.class.getName(), "start() called on illegal state");
state = State.ERROR;
}
}
/** Starts the recording, and sets the state to RECORDING. Call after prepare(). */
public void start() {
if (state == State.READY) {
payloadSize = 0;
audioRecorder.startRecording();
audioRecorder.read(buffer, 0, buffer.length); // [TODO: is this
// necessary]read
// the existing data
// in audio
// hardware, but
// don't do anything
state = State.RECORDING;
} else {
Log.e(WavAudioRecorder.class.getName(), "start() called on illegal state");
state = State.ERROR;
}
}
/**
* Reads media data from this <tt>PullBufferStream</tt> into a specific <tt>Buffer</tt> with
* blocking.
*
* @param buffer the <tt>Buffer</tt> in which media data is to be read from this
* <tt>PullBufferStream</tt>
* @throws IOException if anything goes wrong while reading media data from this
* <tt>PullBufferStream</tt> into the specified <tt>buffer</tt>
* @see javax.media.protocol.PullBufferStream#read(javax.media.Buffer)
*/
public void read(Buffer buffer) throws IOException {
if (setThreadPriority) {
setThreadPriority = false;
setThreadPriority();
}
Object data = buffer.getData();
int length = this.length;
if (data instanceof byte[]) {
if (((byte[]) data).length < length) data = null;
} else data = null;
if (data == null) {
data = new byte[length];
buffer.setData(data);
}
int toRead = length;
byte[] bytes = (byte[]) data;
int offset = 0;
buffer.setLength(0);
while (toRead > 0) {
int read;
synchronized (this) {
if (audioRecord.getRecordingState() == AudioRecord.RECORDSTATE_RECORDING)
read = audioRecord.read(bytes, offset, toRead);
else break;
}
if (read < 0) {
throw new IOException(
AudioRecord.class.getName() + "#read(byte[], int, int) returned " + read);
} else {
buffer.setLength(buffer.getLength() + read);
offset += read;
toRead -= read;
}
}
buffer.setOffset(0);
// Apply software gain.
if (gainControl != null) {
BasicVolumeControl.applyGain(gainControl, bytes, buffer.getOffset(), buffer.getLength());
}
}
private void listenAck() {
Modulation.initDecoder(); // for record
Modulation.setListenMode('p');
mRecordData = new short[mRecordBufSize / 2];
while (!Thread.interrupted() && mIsPlaying) {
int readBytes = mRecorder.read(mRecordData, 0, mRecordBufSize / 2);
if (readBytes > 0) {
int ret = Modulation.process(mRecordData, readBytes);
if (ret == 2) {
String str = "";
byte[] result = Modulation.getResult();
try {
str = new String(result, "UTF-8");
Log.d(TAG, "recorder ProcessData GetResult : " + str);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
Message msg = mHandler.obtainMessage();
msg.what = Modulation.MODULATION_HANDLER_RECV_NOTIFY_ACK;
mHandler.sendMessage(msg);
// break;
}
} else {
Log.d(TAG, "recorder read ret : " + readBytes);
}
}
try {
if (mRecorder != null) {
mRecorder.stop();
mRecorder.release();
mRecorder = null;
}
} catch (Exception e) {
e.printStackTrace();
}
Modulation.setListenMode('r');
Modulation.releaseDecoder();
}
public void run() {
init();
Log.i("c", "2");
audioRecord.startRecording();
while (isRecording) {
Log.i("c", "3");
int readLen = audioRecord.read(bufSend, 0, bufferSizeInBytes);
try {
sout.write(bufSend, 0, readLen);
sout.flush();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
audioRecord.stop();
}
@Override
public void run() {
startRecording();
startRecordTime = System.currentTimeMillis();
byteStream = new ByteArrayOutputStream();
byte[] buffer = new byte[bufferSize];
while (recordFlag && System.currentTimeMillis() - startRecordTime < MAX_RECORD_TIME) {
try {
Thread.sleep(1);
audioRecord.read(buffer, 0, buffer.length);
byteStream.write(buffer);
} catch (InterruptedException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
stopRecording();
}
private void startListening() {
int recordedDataSize = (int) (SAMPLE_FREQ * REC_LENGTH_S);
fft = new FloatFFT_1D(recordedDataSize);
mRecordedData = new short[recordedDataSize];
int bufferSize =
AudioRecord.getMinBufferSize(
SAMPLE_FREQ, AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT);
short[] readAudioData = new short[bufferSize];
AudioRecord audioRecord =
new AudioRecord(
MediaRecorder.AudioSource.MIC,
SAMPLE_FREQ,
AudioFormat.CHANNEL_IN_MONO,
AudioFormat.ENCODING_PCM_16BIT,
bufferSize);
audioRecord.startRecording();
int indexInRecordedData = 0;
while (mIsListening) {
int readDataSize = audioRecord.read(readAudioData, 0, bufferSize);
for (int i = 0; i < readDataSize; i++) {
if (readAudioData[i] >= AMPLITUDE_DETECTOR && !mIsProcessing) mIsRecording = true;
if (mIsRecording == true && indexInRecordedData < recordedDataSize) {
mRecordedData[indexInRecordedData++] = readAudioData[i];
} else if (indexInRecordedData >= recordedDataSize) {
mIsRecording = false;
indexInRecordedData = 0;
processRecordedData();
}
}
}
audioRecord.stop();
audioRecord.release();
}
public void run() {
android.os.Process.setThreadPriority(android.os.Process.THREAD_PRIORITY_URGENT_AUDIO);
try {
if (recorder != null) {
recorder.stop();
recorder.startRecording();
isRecording.set(true);
}
} catch (IllegalStateException e) {
isRecording.set(false);
}
try {
loop:
while (true) {
if (isRecording.get()) {
abuf_short = new short[Settings.blockSize];
recorder.read(abuf_short, 0, Settings.blockSize);
output.put(new WaveFrame(abuf_short, currentFrame));
currentFrame++;
} else {
output.put(Settings.STOP);
break loop;
}
}
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
e.printStackTrace();
}
try {
if (recorder != null) {
recorder.stop();
recorder.release();
recorder = null;
}
} catch (IllegalStateException e) {
e.printStackTrace();
}
}
public void run() {
try {
byte[] bytes_pkg;
m_in_rec.startRecording();
while (m_keep_running) {
m_in_rec.read(m_in_bytes, 0, m_in_buf_size);
bytes_pkg = m_in_bytes.clone();
if (m_in_q.size() >= 2) {
dout.write(m_in_q.removeFirst(), 0, m_in_q.removeFirst().length);
}
m_in_q.add(bytes_pkg);
}
m_in_rec.stop();
m_in_rec = null;
m_in_bytes = null;
dout.close();
} catch (Exception e) {
e.printStackTrace();
}
}
// periodic updates on the progress of the record head
public void onPeriodicNotification(AudioRecord recorder) {
if (State.STOPPED == state) {
Log.d(WavAudioRecorder.this.getClass().getName(), "recorder stopped");
return;
}
int numOfBytes = audioRecorder.read(buffer, 0, buffer.length); // read
// audio
// data
// to
// buffer
// Log.d(WavAudioRecorder.this.getClass().getName(), state + ":" +
// numOfBytes);
try {
randomAccessWriter.write(buffer); // write audio data to file
payloadSize += buffer.length;
} catch (IOException e) {
Log.e(
WavAudioRecorder.class.getName(),
"Error occured in updateListener, recording is aborted");
e.printStackTrace();
}
}
// long l;
public void run() { // fft
targetDataLine_.startRecording();
bufferRead = new byte[READ_BUFFERSIZE];
int n = -1;
while ((n = targetDataLine_.read(bufferRead, 0, READ_BUFFERSIZE)) > 0) {
// l = System.currentTimeMillis();
currentFrequency = processSampleData(bufferRead, SAMPLE_RATE);
double temp = System.currentTimeMillis() - 1;
Log.d("processtime", "process time = " + temp);
if (currentFrequency > 0) {
mHandler.post(callback);
try {
targetDataLine_.stop();
Thread.sleep(20);
targetDataLine_.startRecording();
} catch (InterruptedException e) {
// e.printStackTrace();
}
}
}
}
/** Functionality that gets the sound level out of the sample */
private void readAudioBuffer() {
try {
short[] buffer = new short[bufferSize];
int bufferReadResult = 1;
if (audio != null) {
// Sense the voice...
bufferReadResult = audio.read(buffer, 0, bufferSize);
double sumLevel = 0;
for (int i = 0; i < bufferReadResult; i++) {
sumLevel += buffer[i];
}
lastLevel = Math.abs((sumLevel / bufferReadResult));
}
} catch (Exception e) {
e.printStackTrace();
}
}
@Override
protected Void doInBackground(Void... params) {
try {
int bufferSize =
AudioRecord.getMinBufferSize(frequency, channelConfiguration, audioEncoding);
AudioRecord audioRecord =
new AudioRecord(
MediaRecorder.AudioSource.MIC,
frequency,
channelConfiguration,
audioEncoding,
bufferSize);
short[] buffer = new short[blockSize];
double[] toTransform = new double[blockSize];
audioRecord.startRecording();
while (recordTask != null) {
int bufferReadResult = audioRecord.read(buffer, 0, blockSize);
for (int i = 0; i < blockSize && i < bufferReadResult; i++) {
toTransform[i] = buffer[i] / 32768.0; // signed
// 16bit
}
transformer.ft(toTransform);
publishProgress(toTransform);
}
audioRecord.stop();
} catch (Throwable t) {
Log.e("AudioRecord", "Recording Failed");
}
return null;
}
public byte[] getFrameBytes() {
audioRecord.read(buffer, 0, frameByteSize);
// analyze sound
int totalAbsValue = 0;
short sample = 0;
float averageAbsValue = 0.0f;
for (int i = 0; i < frameByteSize; i += 2) {
sample = (short) ((buffer[i]) | buffer[i + 1] << 8);
totalAbsValue += Math.abs(sample);
}
averageAbsValue = totalAbsValue / frameByteSize / 2;
// System.out.println(averageAbsValue);
// no input
if (averageAbsValue < 30) {
return null;
}
return buffer;
}