io.j99.library.mp3recorder

类 LameEncoder

java.lang.Object

io.j99.library.mp3recorder.LameEncoder

public class LameEncoder
extends Object

LAME interface class

构造器概要

构造器

构造器和说明
LameEncoder()

方法概要

限定符和类型	方法和说明
static void	close() Close LAME.
static int	encode(short[] buffer_l, short[] buffer_r, int samples, byte[] mp3buf) Encode buffer to mp3.
static int	flush(byte[] mp3buf) Flush LAME buffer.
static void	init(int inSamplerate, int outChannel, int outSamplerate, int outBitrate) Initialize LAME.
static void	init(int inSamplerate, int outChannel, int outSamplerate, int outBitrate, int quality) Initialize LAME.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

LameEncoder

public LameEncoder()

方法详细资料

init

public static void init(int inSamplerate,
                        int outChannel,
                        int outSamplerate,
                        int outBitrate)

Initialize LAME.

参数:

inSamplerate - input sample rate in Hz.

outChannel - number of channels in input stream.

outSamplerate - output sample rate in Hz.

outBitrate - brate compression ratio in KHz.

init

public static void init(int inSamplerate,
                        int outChannel,
                        int outSamplerate,
                        int outBitrate,
                        int quality)

Initialize LAME.

参数:

inSamplerate - input sample rate in Hz.

outChannel - number of channels in input stream.

outSamplerate - output sample rate in Hz.

outBitrate - brate compression ratio in KHz.

quality - quality=0..9. 0=best (very slow). 9=worst.
recommended:
2 near-best quality, not too slow
5 good quality, fast
7 ok quality, really fast

encode

public static int encode(short[] buffer_l,
                         short[] buffer_r,
                         int samples,
                         byte[] mp3buf)

Encode buffer to mp3.

参数:

buffer_l - PCM data for left channel.

buffer_r - PCM data for right channel.

samples - number of samples per channel.

mp3buf - result encoded MP3 stream. You must specified "7200 + (1.25 * buffer_l.length)" length array.

返回:

number of bytes output in mp3buf. Can be 0.
-1: mp3buf was too small
-2: malloc() problem
-3: lame_init_params() not called
-4: psycho acoustic problems

flush

public static int flush(byte[] mp3buf)

Flush LAME buffer.

参数:

mp3buf - result encoded MP3 stream. You must specified at least 7200 bytes.

返回:

number of bytes output to mp3buf. Can be 0.

close

public static void close()

Close LAME.