Wav文件在java中转换为字节数组
我的项目是“对阿塞拜疆语言的语音识别”。 我必须编写一个将wav文件转换为字节数组的程序。
如何将音频文件转换为byte []？
基本上如第一个答案中的片段所描述的那样，而不是BufferedInputStream使用AudioSystem.getAudioInputStream(File)来获取InputStream 。
使用从AudioSystem获得的音频流将确保标头被剥离，输入文件解码为表示实际声音帧/样本的byte [] – 然后可用于FFT等。
将此文件写入ByteArrayOutputStream
ByteArrayOutputStream out = new ByteArrayOutputStream(); BufferedInputStream in = new BufferedInputStream(new FileInputStream(WAV_FILE)); int read; byte[] buff = new byte[1024]; while ((read = in.read(buff)) > 0) { out.write(buff, 0, read); } out.flush(); byte[] audioBytes = out.toByteArray();
import java.io.*; import java.nio.ByteBuffer; import java.nio.ByteOrder; import java.util.LinkedHashMap; import javax.sound.sampled.*; /** * This class reads a .wav file and converts it to a bunch of byte arrays. * * The info represented by these byte arrays is then printed out. * * An example of playing these byte arrays with the speakers is used. * * It also converts the byte arrays to a .wav file. * * An extension of this concept can record from a microphone. * In this case, some values like sampling rate would need to be assumed. * * See https://ccrma.stanford.edu/courses/422/projects/WaveFormat/ for .wav file spec * * @author sizu */ public class WavFileHelper { public static void main(String[] args) { final String NEWLINE = "\n"; int recordingSampleRate = 22050; short recordingBitsPerSample = 16; short recordingNumChannels = 2; String inputFile = "/input.wav"; // Place the wav file in the top level directory, ie S:/input.wav String outputFile = "/output.wav"; String recordedFile = "/capture.wav"; System.out.println("START"); try { WavData wavInputData = new WavData(); WavData wavRecordData = new WavData(); wavRecordData.put(WaveSection.SAMPLE_RATE, recordingSampleRate); wavRecordData.put(WaveSection.BITS_PER_SAMPLE, recordingBitsPerSample); wavRecordData.put(WaveSection.NUM_CHANNELS, recordingNumChannels); System.out.println(NEWLINE+"CONVERT WAV FILE TO BYTE ARRAY"); wavInputData.read(inputFile); System.out.println(NEWLINE+"CONVERT BYTE ARRAY TO WAV FILE"); wavInputData.write(outputFile); System.out.println(NEWLINE+"DISPLAY BYTE ARRAY INFORMATION FOR INPUT FILE"); wavInputData.printByteInfo(); System.out.println(NEWLINE+"START RECORDING - You can connect the microphone to the speakers"); WavAudioRecorder recorder = new WavFileHelper.WavAudioRecorder(wavRecordData); recorder.startRecording(); System.out.println(NEWLINE+"PLAY BYTE ARRAY (THIS WILL BE RECORDED)"); WavAudioPlayer player = new WavFileHelper.WavAudioPlayer(wavInputData); player.playAudio(); System.out.println(NEWLINE+"STOP RECORDING FOR RECORDING"); recorder.stopRecording(); System.out.println(NEWLINE+"DISPLAY BYTE ARRAY INFORMATION"); wavRecordData.printByteInfo(); System.out.println(NEWLINE+"SAVE RECORDING IN WAV FILE"); wavRecordData.write(recordedFile); } catch (Exception ex) { ex.printStackTrace(); } System.out.println("FINISH"); } public static enum WaveSection { // 12 Bytes CHUNK_ID(4, ByteOrder.BIG_ENDIAN), CHUNK_SIZE(4, ByteOrder.LITTLE_ENDIAN), FORMAT(4, ByteOrder.BIG_ENDIAN), // 24 Bytes SUBCHUNK1_ID(4, ByteOrder.BIG_ENDIAN), SUBCHUNK1_SIZE(4, ByteOrder.LITTLE_ENDIAN), AUDIO_FORMAT(2, ByteOrder.LITTLE_ENDIAN), NUM_CHANNELS(2, ByteOrder.LITTLE_ENDIAN), SAMPLE_RATE(4, ByteOrder.LITTLE_ENDIAN), BYTE_RATE(4, ByteOrder.LITTLE_ENDIAN), BLOCK_ALIGN(2, ByteOrder.LITTLE_ENDIAN), BITS_PER_SAMPLE(2, ByteOrder.LITTLE_ENDIAN), // 8 Bytes SUBCHUNK2_ID(4, ByteOrder.BIG_ENDIAN), SUBCHUNK2_SIZE(4, ByteOrder.LITTLE_ENDIAN), DATA(0, ByteOrder.LITTLE_ENDIAN), ; private Integer numBytes; private ByteOrder endian; WaveSection(Integer numBytes, ByteOrder endian){ this.numBytes = numBytes; this.endian = endian; } } public static class WavData extends LinkedHashMap{ static int HEADER_SIZE = 44; // There are 44 bits before the data section static int DEFAULT_SUBCHUNK1_SIZE = 16; static short DEFAULT_AUDIO_FORMAT = 1; static short DEFAULT_BLOCK_ALIGN = 4; static String DEFAULT_CHUNK_ID = "RIFF"; static String DEFAULT_FORMAT = "WAVE"; static String DEFAULT_SUBCHUNK1_ID = "fmt "; static String DEFAULT_SUBCHUNK2_ID = "data"; public WavData(){ this.put(WaveSection.CHUNK_ID, DEFAULT_CHUNK_ID); this.put(WaveSection.FORMAT, DEFAULT_FORMAT); this.put(WaveSection.SUBCHUNK1_ID, DEFAULT_SUBCHUNK1_ID); this.put(WaveSection.SUBCHUNK1_SIZE, DEFAULT_SUBCHUNK1_SIZE); this.put(WaveSection.AUDIO_FORMAT, DEFAULT_AUDIO_FORMAT); this.put(WaveSection.BLOCK_ALIGN, DEFAULT_BLOCK_ALIGN); this.put(WaveSection.SUBCHUNK2_ID, DEFAULT_SUBCHUNK2_ID); this.put(WaveSection.CHUNK_SIZE, 0); this.put(WaveSection.SUBCHUNK2_SIZE, 0); this.put(WaveSection.BYTE_RATE, 0); } public void put(WaveSection waveSection, String value){ byte[] bytes = value.getBytes(); this.put(waveSection, bytes); } public void put(WaveSection waveSection, int value) { byte[] bytes = ByteBuffer.allocate(4).order(ByteOrder.LITTLE_ENDIAN).putInt(value).array(); this.put(waveSection, bytes); } public void put(WaveSection waveSection, short value) { byte[] bytes = ByteBuffer.allocate(2).order(ByteOrder.LITTLE_ENDIAN).putShort(value).array(); this.put(waveSection, bytes); } public byte[] getBytes(WaveSection waveSection) { return this.get(waveSection); } public String getString(WaveSection waveSection) { byte[] bytes = this.get(waveSection); return new String(bytes); } public int getInt(WaveSection waveSection) { byte[] bytes = this.get(waveSection); return ByteBuffer.wrap(bytes).order(ByteOrder.LITTLE_ENDIAN).getInt(); } public short getShort(WaveSection waveSection) { byte[] bytes = this.get(waveSection); return ByteBuffer.wrap(bytes).order(ByteOrder.LITTLE_ENDIAN).getShort(); } public void printByteInfo() { for (WaveSection waveSection : WaveSection.values()) { if (waveSection.numBytes == 4 && waveSection.endian == ByteOrder.BIG_ENDIAN) { System.out.println("SECTION:" + waveSection + ":STRING:" + this.getString(waveSection)); } else if (waveSection.numBytes == 4 && waveSection.endian == ByteOrder.LITTLE_ENDIAN) { System.out.println("SECTION:" + waveSection + ":INTEGER:" + this.getInt(waveSection)); } else if (waveSection.numBytes == 2 && waveSection.endian == ByteOrder.LITTLE_ENDIAN) { System.out.println("SECTION:" + waveSection + ":SHORT:" + this.getShort(waveSection)); } else { // Data Section } } } public void read(String inputPath) throws Exception { // Analyze redundant info int dataSize = (int) new File(inputPath).length() - HEADER_SIZE; WaveSection.DATA.numBytes = dataSize; // Can't have two threads using this at the same time // Read from File DataInputStream inFile = new DataInputStream(new FileInputStream(inputPath)); for (WaveSection waveSection : WaveSection.values()) { byte[] readBytes = new byte[waveSection.numBytes]; for (int i = 0; i < waveSection.numBytes; i++) { readBytes[i] = inFile.readByte(); } this.put(waveSection, readBytes); } inFile.close(); } public void write(String outputPath) throws Exception { // Analyze redundant info int dataSize = this.get(WaveSection.DATA).length; this.put(WaveSection.CHUNK_SIZE, dataSize+36); this.put(WaveSection.SUBCHUNK2_SIZE, dataSize); int byteRate = this.getInt(WaveSection.SAMPLE_RATE)*this.getShort(WaveSection.BLOCK_ALIGN); this.put(WaveSection.BYTE_RATE, byteRate); // Write to File DataOutputStream dataOutputStream = new DataOutputStream(new FileOutputStream(outputPath)); for (WaveSection waveSection : WaveSection.values()) { dataOutputStream.write(this.getBytes(waveSection)); } dataOutputStream.close(); } public AudioFormat createAudioFormat() { boolean audioSignedSamples = true; // Samples are signed boolean audioBigEndian = false; float sampleRate = (float) this.getInt(WaveSection.SAMPLE_RATE); int bitsPerSample = (int) this.getShort(WaveSection.BITS_PER_SAMPLE); int numChannels = (int) this.getShort(WaveSection.NUM_CHANNELS); return new AudioFormat(sampleRate, bitsPerSample, numChannels, audioSignedSamples, audioBigEndian); } } public static class WavAudioPlayer { WavData waveData = new WavData(); public WavAudioPlayer(WavData waveData){ this.waveData = waveData; } public void playAudio() throws Exception { byte[] data = waveData.getBytes(WaveSection.DATA); // Create an audio input stream from byte array AudioFormat audioFormat = waveData.createAudioFormat(); InputStream byteArrayInputStream = new ByteArrayInputStream(data); AudioInputStream audioInputStream = new AudioInputStream(byteArrayInputStream, audioFormat, data.length / audioFormat.getFrameSize()); // Write audio input stream to speaker source data line DataLine.Info dataLineInfo = new DataLine.Info(SourceDataLine.class, audioFormat); SourceDataLine sourceDataLine = (SourceDataLine) AudioSystem.getLine(dataLineInfo); sourceDataLine.open(audioFormat); sourceDataLine.start(); // Loop through input stream to write to source data line byte[] tempBuffer = new byte[10000]; int cnt; while ((cnt = audioInputStream.read(tempBuffer, 0, tempBuffer.length)) != -1) { sourceDataLine.write(tempBuffer, 0, cnt); } // Cleanup sourceDataLine.drain(); sourceDataLine.close(); byteArrayInputStream.close(); } } public static class WavAudioRecorder implements Runnable { WavData waveData = new WavData(); boolean recording = true; Thread runningThread; ByteArrayOutputStream byteArrayOutputStream; public WavAudioRecorder(WavData waveData){ this.waveData = waveData; } public void startRecording(){ this.recording = true; this.runningThread = new Thread(this); runningThread.start(); } public WavData stopRecording() throws Exception{ this.recording = false; runningThread.stop(); waveData.put(WaveSection.DATA, byteArrayOutputStream.toByteArray()); return waveData; } public void run() { try { // Create an audio output stream for byte array byteArrayOutputStream = new ByteArrayOutputStream(); // Write audio input stream to speaker source data line AudioFormat audioFormat = waveData.createAudioFormat(); DataLine.Info info = new DataLine.Info(TargetDataLine.class, audioFormat); TargetDataLine targetDataLine = (TargetDataLine) AudioSystem.getLine(info); targetDataLine.open(audioFormat); targetDataLine.start(); // Loop through target data line to write to output stream int numBytesRead; byte[] data = new byte[targetDataLine.getBufferSize() / 5]; while(recording) { numBytesRead = targetDataLine.read(data, 0, data.length); byteArrayOutputStream.write(data, 0, numBytesRead); } // Cleanup targetDataLine.stop(); targetDataLine.close(); byteArrayOutputStream.close(); } catch (Exception ex) { ex.printStackTrace(); } } } }
将文件转换为字节数组
fileToByteArray（ “C：\ .. \ my.mp3”）;
`public static byte[] fileToByteArray(String name){ Path path = Paths.get(name); try { return Files.readAllBytes(path); } catch (IOException e) { e.printStackTrace(); return null; } }`