Added in [API level 30](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) Summary: [Methods](https://developer.android.com/reference/android/media/MediaCodec.LinearBlock#pubmethods) \| [Protected Methods](https://developer.android.com/reference/android/media/MediaCodec.LinearBlock#promethods) \| [Inherited Methods](https://developer.android.com/reference/android/media/MediaCodec.LinearBlock#inhmethods)

# MediaCodec.LinearBlock

*** ** * ** ***


`
public
static
final

class
MediaCodec.LinearBlock
`


`

extends https://developer.android.com/reference/java/lang/Object


`

`


`

|---|---|
| [java.lang.Object](https://developer.android.com/reference/java/lang/Object) ||
| ↳ | android.media.MediaCodec.LinearBlock |

<br />

*** ** * ** ***

Section of memory that represents a linear block. Applications may
acquire a block via `https://developer.android.com/reference/android/media/MediaCodec.LinearBlock#obtain(int,%20java.lang.String[])` and queue all or part
of the block as an input buffer to a codec, or get a block allocated by
codec as an output buffer from `https://developer.android.com/reference/android/media/MediaCodec.OutputFrame`.
**See also:**

- `https://developer.android.com/reference/android/media/MediaCodec.QueueRequest#setLinearBlock(android.media.MediaCodec.LinearBlock,%20int,%20int)`
- `https://developer.android.com/reference/android/media/MediaCodec.QueueRequest#setEncryptedLinearBlock(android.media.MediaCodec.LinearBlock,%20int,%20int,%20android.media.MediaCodec.CryptoInfo)`
- `https://developer.android.com/reference/android/media/MediaCodec.OutputFrame#getLinearBlock()`

## Summary

| ### Public methods ||
|---|---|
| ` static boolean` | ` https://developer.android.com/reference/android/media/MediaCodec.LinearBlock#isCodecCopyFreeCompatible(java.lang.String[])(https://developer.android.com/reference/java/lang/String codecNames) ` Returns true if it is possible to allocate a linear block that can be passed to all listed codecs as input buffers without copying the content. |
| ` boolean` | ` https://developer.android.com/reference/android/media/MediaCodec.LinearBlock#isMappable()() ` Returns true if the buffer is mappable. |
| ` https://developer.android.com/reference/java/nio/ByteBuffer` | ` https://developer.android.com/reference/android/media/MediaCodec.LinearBlock#map()() ` Map the memory and return the mapped region. |
| ` static https://developer.android.com/reference/android/media/MediaCodec.LinearBlock` | ` https://developer.android.com/reference/android/media/MediaCodec.LinearBlock#obtain(int,%20java.lang.String[])(int capacity, https://developer.android.com/reference/java/lang/String codecNames) ` Obtain a linear block object no smaller than `capacity`. |
| ` void` | ` https://developer.android.com/reference/android/media/MediaCodec.LinearBlock#recycle()() ` Mark this block as ready to be recycled by the framework once it is no longer in use. |

| ### Protected methods ||
|---|---|
| ` void` | ` https://developer.android.com/reference/android/media/MediaCodec.LinearBlock#finalize()() ` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. |

| ### Inherited methods |
|---|---|
| From class ` https://developer.android.com/reference/java/lang/Object ` |---|---| | ` https://developer.android.com/reference/java/lang/Object` | ` https://developer.android.com/reference/java/lang/Object#clone()() ` Creates and returns a copy of this object. | | ` boolean` | ` https://developer.android.com/reference/java/lang/Object#equals(java.lang.Object)(https://developer.android.com/reference/java/lang/Object obj) ` Indicates whether some other object is "equal to" this one. | | ` void` | ` https://developer.android.com/reference/java/lang/Object#finalize()() ` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. | | ` final https://developer.android.com/reference/java/lang/Class<?>` | ` https://developer.android.com/reference/java/lang/Object#getClass()() ` Returns the runtime class of this `Object`. | | ` int` | ` https://developer.android.com/reference/java/lang/Object#hashCode()() ` Returns a hash code value for the object. | | ` final void` | ` https://developer.android.com/reference/java/lang/Object#notify()() ` Wakes up a single thread that is waiting on this object's monitor. | | ` final void` | ` https://developer.android.com/reference/java/lang/Object#notifyAll()() ` Wakes up all threads that are waiting on this object's monitor. | | ` https://developer.android.com/reference/java/lang/String` | ` https://developer.android.com/reference/java/lang/Object#toString()() ` Returns a string representation of the object. | | ` final void` | ` https://developer.android.com/reference/java/lang/Object#wait(long,%20int)(long timeoutMillis, int nanos) ` Causes the current thread to wait until it is awakened, typically by being *notified* or *interrupted*, or until a certain amount of real time has elapsed. | | ` final void` | ` https://developer.android.com/reference/java/lang/Object#wait(long)(long timeoutMillis) ` Causes the current thread to wait until it is awakened, typically by being *notified* or *interrupted*, or until a certain amount of real time has elapsed. | | ` final void` | ` https://developer.android.com/reference/java/lang/Object#wait()() ` Causes the current thread to wait until it is awakened, typically by being *notified* or *interrupted*. | ||

## Public methods

### isCodecCopyFreeCompatible

Added in [API level 30](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public static boolean isCodecCopyFreeCompatible (String[] codecNames)
```

Returns true if it is possible to allocate a linear block that can be
passed to all listed codecs as input buffers without copying the
content.


Note that even if this function returns true, `https://developer.android.com/reference/android/media/MediaCodec.LinearBlock#obtain(int,%20java.lang.String[])` may
still throw due to invalid arguments or allocation failure.

<br />

| Parameters ||
|---|---|
| `codecNames` | `String`: list of codecs that the client wants to use a linear block without copying. Null entries are ignored. This value cannot be `null`. <br /> |

| Returns ||
|---|---|
| `boolean` | <br /> |

### isMappable

Added in [API level 30](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public boolean isMappable ()
```

Returns true if the buffer is mappable.

<br />

| Returns ||
|---|---|
| `boolean` | <br /> |

| Throws ||
|---|---|
| `https://developer.android.com/reference/java/lang/IllegalStateException` | if invalid |

### map

Added in [API level 30](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public ByteBuffer map ()
```

Map the memory and return the mapped region.


The returned memory region becomes inaccessible after
`https://developer.android.com/reference/android/media/MediaCodec.LinearBlock#recycle()`, or the buffer is queued to the codecs and not
returned to the client yet.

<br />

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/nio/ByteBuffer` | mapped memory region as `https://developer.android.com/reference/java/nio/ByteBuffer` object. This value cannot be `null`. <br /> |

| Throws ||
|---|---|
| `https://developer.android.com/reference/java/lang/IllegalStateException` | if not mappable or invalid |

### obtain

Added in [API level 30](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public static MediaCodec.LinearBlock obtain (int capacity, 
                String[] codecNames)
```

Obtain a linear block object no smaller than `capacity`.
If `https://developer.android.com/reference/android/media/MediaCodec.LinearBlock#isCodecCopyFreeCompatible(java.lang.String[])` with the same
`codecNames` returned true, the returned
`https://developer.android.com/reference/android/media/MediaCodec.LinearBlock` object can be queued to the listed codecs without
copying. The returned `https://developer.android.com/reference/android/media/MediaCodec.LinearBlock` object is always
read/write mappable.

<br />

| Parameters ||
|---|---|
| `capacity` | `int`: requested capacity of the linear block in bytes <br /> |
| `codecNames` | `String`: list of codecs that the client wants to use this linear block without copying. Null entries are ignored. This value cannot be `null`. <br /> |

| Returns ||
|---|---|
| `https://developer.android.com/reference/android/media/MediaCodec.LinearBlock` | a linear block object. This value may be `null`. <br /> |

| Throws ||
|---|---|
| `https://developer.android.com/reference/java/io/IOException` | if an error occurred while allocating a buffer |
| `https://developer.android.com/reference/java/lang/IllegalArgumentException` | if the capacity is invalid or codecNames contains invalid name |

### recycle

Added in [API level 30](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public void recycle ()
```

Mark this block as ready to be recycled by the framework once it is
no longer in use. All operations to this object after
this call will cause exceptions, as well as attempt to access the
previously mapped memory region. Caller should clear all references
to this object after this call.


To avoid excessive memory consumption, it is recommended that callers
recycle buffers as soon as they no longer need the buffers

<br />

| Throws ||
|---|---|
| `https://developer.android.com/reference/java/lang/IllegalStateException` | if invalid |

## Protected methods

### finalize

Added in [API level 30](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
protected void finalize ()
```

Called by the garbage collector on an object when garbage collection
determines that there are no more references to the object.
A subclass overrides the `finalize` method to dispose of
system resources or to perform other cleanup.


The general contract of `finalize` is that it is invoked
if and when the Java virtual
machine has determined that there is no longer any
means by which this object can be accessed by any thread that has
not yet died, except as a result of an action taken by the
finalization of some other object or class which is ready to be
finalized. The `finalize` method may take any action, including
making this object available again to other threads; the usual purpose
of `finalize`, however, is to perform cleanup actions before
the object is irrevocably discarded. For example, the finalize method
for an object that represents an input/output connection might perform
explicit I/O transactions to break the connection before the object is
permanently discarded.


The `finalize` method of class `Object` performs no
special action; it simply returns normally. Subclasses of
`Object` may override this definition.


The Java programming language does not guarantee which thread will
invoke the `finalize` method for any given object. It is
guaranteed, however, that the thread that invokes finalize will not
be holding any user-visible synchronization locks when finalize is
invoked. If an uncaught exception is thrown by the finalize method,
the exception is ignored and finalization of that object terminates.


After the `finalize` method has been invoked for an object, no
further action is taken until the Java virtual machine has again
determined that there is no longer any means by which this object can
be accessed by any thread that has not yet died, including possible
actions by other objects or classes which are ready to be finalized,
at which point the object may be discarded.


The `finalize` method is never invoked more than once by a Java
virtual machine for any given object.


Any exception thrown by the `finalize` method causes
the finalization of this object to be halted, but is otherwise
ignored.

<br />