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package com.kapark.cloud.utils;
import javax.sound.sampled.AudioFormat;
/**
* @author: hyzhan
* @date: 2019/6/13
* @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");
}
}
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