android音频录音，(二)MediaRecorder 配置参数简介

1.MediaRecorder 参数定义文件路径：

frameworks/base/media/java/android/media/MediaRecorder.java

2：各参数类型：

音频源类型定音：
/** @hide */
@IntDef({
AudioSource.DEFAULT,
AudioSource.MIC,
AudioSource.VOICE_UPLINK,
AudioSource.VOICE_DOWNLINK,
AudioSource.VOICE_CALL,
AudioSource.CAMCORDER,
AudioSource.VOICE_RECOGNITION,
AudioSource.VOICE_COMMUNICATION,
AudioSource.UNPROCESSED,
AudioSource.VOICE_PERFORMANCE,
})

输出文件格式:
/**
`

Defines the output format. These constants are used with
{@link MediaRecorder#setOutputFormat(int)}.
/
public final class OutputFormat {
/ Do not change these values without updating their counterparts
in include/media/mediarecorder.h!
/
private OutputFormat() {}
public static final int DEFAULT = 0;
/* 3GPP media file format*/
public static final int THREE_GPP = 1;
/** MPEG4 media file format*/
public static final int MPEG_4 = 2;`

/** The following formats are audio only .aac or .amr formats */

/**
`

AMR NB file format
@deprecated Deprecated in favor of MediaRecorder.OutputFormat.AMR_NB
*/
public static final int RAW_AMR = 3;`

/** AMR NB file format */
public static final int AMR_NB = 3;

/** AMR WB file format */
public static final int AMR_WB = 4;

/** @hide AAC ADIF file format */
public static final int AAC_ADIF = 5;

/** AAC ADTS file format */
public static final int AAC_ADTS = 6;

/** @hide Stream over a socket, limited to a single stream */
public static final int OUTPUT_FORMAT_RTP_AVP = 7;

/** H.264/AAC data encapsulated in MPEG2/TS */
public static final int MPEG_2_TS = 8;

/** VP8/VORBIS data in a WEBM container */
public static final int WEBM = 9;

/** @hide HEIC data in a HEIF container */
public static final int HEIF = 10;
/** Opus data in a Ogg container */
public static final int OGG = 11;
};

音频编码器类型：
/**
`

Defines the audio encoding. These constants are used with
{@link MediaRecorder#setAudioEncoder(int)}.
/
public final class AudioEncoder {
/ Do not change these values without updating their counterparts
in include/media/mediarecorder.h!
/
private AudioEncoder() {}
public static final int DEFAULT = 0;
/* AMR (Narrowband) audio codec /
public static final int AMR_NB = 1;
/* AMR (Wideband) audio codec /
public static final int AMR_WB = 2;
/* AAC Low Complexity (AAC-LC) audio codec /
public static final int AAC = 3;
/* High Efficiency AAC (HE-AAC) audio codec /
public static final int HE_AAC = 4;
/* Enhanced Low Delay AAC (AAC-ELD) audio codec /
public static final int AAC_ELD = 5;
/* Ogg Vorbis audio codec (Support is optional) /
public static final int VORBIS = 6;
/* Opus audio codec */
public static final int OPUS = 7;
}`