package com.kapark.cloud.utils;


import javax.sound.sampled.AudioFormat;

/**
 * @author: hyzhan
 * @date: 2019年6月13日
 * @desc: TODO
 */
public class AMAudioFormat {
 public static final int FORMAT_CODE_CD = 1;
 public static final int FORMAT_CODE_FM = 2;
 public static final int FORMAT_CODE_TELEPHONE = 3;
 public static final int FORMAT_CODE_GSM = 4;
 public static final String[] FORMAT_NAMES = {
 "Cell phone GSM (13.2KBit/s - Modem)",
 "Telephone ulaw (64KBit/s - ISDN)",
 "FM quality mono (352.8KBit/s - ADSL)",
 "CD quality mono (705.6KBit/s - LAN)"
 };
 public static final int[] FORMAT_CODES = {
 FORMAT_CODE_GSM,
 FORMAT_CODE_TELEPHONE,
 FORMAT_CODE_FM,
 FORMAT_CODE_CD
 };
 public static final int FORMAT_CODE_DEFAULT = FORMAT_CODE_GSM;
 private static int SAMPLE_RATE;
 // always using lines with 16 bit
 private static float LINE_FRAME_SIZE = 2.0f;
 private static float NET_BYTES_PER_SAMPLE;
 // quick look-up tables
 private static final float[] netFrameSize = {
 1, // nothing
 2, // CD
 2, // FM
 1, // Telephone
 33.0f // GSM
 };
 private static final float[] netSampleRate = {
 1.0f, // nothing
 44100.0f, // CD
 22050.0f, // FM
 8000.0f, // Telephone
 8000.0f // GSM
 };
 private static final float[] netFrameRate = {
 1.0f, // nothing
 44100.0f, // CD
 22050.0f, // FM
 8000.0f, // Telephone
 50.0f // GSM
 };

 public static long lineBytes2Ms(long bytes) {
 return (long) (bytes / LINE_FRAME_SIZE * 1000 / SAMPLE_RATE);
 }

 public static long netBytes2Ms(long bytes, int formatCode) {
 return (long) (bytes / netFrameRate[formatCode] * 1000 / netFrameSize[formatCode]);
 }

 public static long bytes2Ms(long bytes, AudioFormat format) {
 return (long) (bytes / format.getFrameRate() * 1000 / format.getFrameSize());
 }

 public static long ms2Bytes(long ms, AudioFormat format) {
 return (long) (ms * format.getFrameRate() / 1000 * format.getFrameSize());
 }

 /**
 * @param formatCode 整型音频格式代号
 * @return 根据传递音频格式代号生成的AudioFormat对象
 */
 public static AudioFormat getLineAudioFormat(int formatCode) {
 return getLineAudioFormat(netSampleRate[formatCode]);
 }

 public static AudioFormat getLineAudioFormat(float sampleRate) {
 return new AudioFormat(
 AudioFormat.Encoding.PCM_SIGNED,
 sampleRate, // sampleRate
 16, // sampleSizeInBits
 1, // channels
 2, // frameSize
 sampleRate, // frameRate
 false); // bigEndian
 // ulaw conversion does not work with Sun's ulaw provider if big endian...
 }

 public static AudioFormat getNetAudioFormat(int nformat) {
 if (nformat == FORMAT_CODE_CD) {
 return new AudioFormat(
 AudioFormat.Encoding.PCM_SIGNED,
 44100.0f, // sampleRate
 16, // sampleSizeInBits
 1, // channels
 2, // frameSize
 44100.0f, // frameRate
 true); // bigEndian
 } else if (nformat == FORMAT_CODE_FM) {
 return new AudioFormat(
 AudioFormat.Encoding.PCM_SIGNED,
 22050.0f, // sampleRate
 16, // sampleSizeInBits
 1, // channels
 2, // frameSize
 22050.0f, // frameRate
 true); // bigEndian
 } else if (nformat == FORMAT_CODE_TELEPHONE) {
 return new AudioFormat(
 AudioFormat.Encoding.ULAW,
 8000.0f, // sampleRate
 8, // sampleSizeInBits
 1, // channels
 1, // frameSize
 8000.0f, // frameRate
 false); // bigEndian
 } else if (nformat == FORMAT_CODE_GSM) {
 try {
 Class.forName("org.tritonus.share.sampled.Encodings");
 } catch (ClassNotFoundException cnfe) {
 throw new RuntimeException("Tritonus shared classes not properly installed!");
 }
 return new AudioFormat(org.tritonus.share.sampled.Encodings.getEncoding("GSM0610"),
 8000.0F, // sampleRate
 -1, // sampleSizeInBits
 1, // channels
 33, // frameSize
 50.0F, // frameRate
 false); // bigEndian
 }
 throw new RuntimeException("Wrong format code!");
 }

 public static int getFormatCode(AudioFormat format) {
 AudioFormat.Encoding encoding = format.getEncoding();
 // very simple check...
 if (encoding.equals(AudioFormat.Encoding.PCM_SIGNED)) {
 if (format.getSampleRate() == 44100.0f) {
 return FORMAT_CODE_CD;
 } else {
 return FORMAT_CODE_FM;
 }
 }
 if (encoding.equals(AudioFormat.Encoding.ULAW)) {
 return FORMAT_CODE_TELEPHONE;
 }
 if (encoding.equals(org.tritonus.share.sampled.Encodings.getEncoding("GSM0610"))) {
 return FORMAT_CODE_GSM;
 }
 throw new RuntimeException("Wrong Format");
 }
}