MpegAudioUtil (ExoPlayer library)

java.lang.Object
- com.google.android.exoplayer2.audio.MpegAudioUtil

public final class MpegAudioUtil
extends Object

Utility methods for handling MPEG audio streams.

Nested Class Summary

Nested Classes
Modifier and Type Class Description

static class MpegAudioUtil.Header
Stores the metadata for an MPEG audio frame.

Field Summary

Fields
Modifier and Type	Field	Description
`static int`	`MAX_FRAME_SIZE_BYTES`	Theoretical maximum frame size for an MPEG audio stream, which occurs when playing a Layer 2 MPEG 2.5 audio stream at 16 kb/s (with padding).
`static int`	`MAX_RATE_BYTES_PER_SECOND`	Maximum rate for an MPEG audio stream corresponding to MPEG-1 layer III (320 kbit/s), in bytes per second.

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static int`	`getFrameSize(int headerData)`	Returns the size of the frame associated with `header`, or `C.LENGTH_UNSET` if it is invalid.
`static int`	`parseMpegAudioFrameSampleCount(int headerData)`	Returns the number of samples per frame associated with `headerData`, or `C.LENGTH_UNSET` if it is invalid.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - MAX_FRAME_SIZE_BYTES
```
public static final int MAX_FRAME_SIZE_BYTES
```
    Theoretical maximum frame size for an MPEG audio stream, which occurs when playing a Layer 2 MPEG 2.5 audio stream at 16 kb/s (with padding). The size is 1152 sample/frame * 160000 bit/s / (8000 sample/s * 8 bit/byte) + 1 padding byte/frame = 2881 byte/frame. The next power of two size is 4 KiB.
    
    See Also:
    
    Constant Field Values
  - MAX_RATE_BYTES_PER_SECOND
```
public static final int MAX_RATE_BYTES_PER_SECOND
```
    Maximum rate for an MPEG audio stream corresponding to MPEG-1 layer III (320 kbit/s), in bytes per second.
    
    See Also:
    
    Constant Field Values
- Method Detail
  - getFrameSize
```
public static int getFrameSize(int headerData)
```
    Returns the size of the frame associated with header, or C.LENGTH_UNSET if it is invalid.
  - parseMpegAudioFrameSampleCount
```
public static int parseMpegAudioFrameSampleCount(int headerData)
```
    Returns the number of samples per frame associated with headerData, or C.LENGTH_UNSET if it is invalid.