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# ACP_COMMAND_INCREMENT_PCM_WRITE_POINTER

> ACP_COMMAND_INCREMENT_PCM_WRITE_POINTER

Command for updating a PCM write pointer.

## Syntax

```cpp theme={null}
typedef struct ACP_COMMAND_INCREMENT_PCM_WRITE_POINTER {  
    UINT32 contextIndex;  
    UINT32 increment;  
} ACP_COMMAND_INCREMENT_PCM_WRITE_POINTER  
```

### Members

*contextIndex*\
Type: UINT32

Index of a context to be updated.

*increment*\
Type: UINT32

Amount by which the pointer is to be incremented.

## Remarks

Used by `ACP_COMMAND_TYPE_UPDATE_PCM_CONTEXT` to update the PCM context write pointer. It is used only when the PCM context is in circular mode. See the [Guidelines for using Sample Rate Conversion for PCM and XMA data section of Overview of ACP](https://docs.xbox.com/build/console-features/audio/overviews/acp-overview.md#ID4EUPAC).

## Requirements

**Header:** acphal.h

**Supported platforms:** XBOX One family consoles and XBOX Series consoles

## See also

[ACP\_COMMAND\_TYPE](https://docs.xbox.com/reference/audio/acphal/enums/acp_command_type.md)\
[SubmitCommand](https://docs.xbox.com/reference/audio/acphal/interfaces/IAcpHal/methods/iacphal_submitcommand.md)\
[AcpHal](https://docs.xbox.com/reference/audio/acphal/acphal_members.md)


## Related topics

- [ACP_COMMAND_TYPE](https://docs.xbox.com/reference/audio/acphal/enums/acp_command_type.md)
- [AcpHal](https://docs.xbox.com/reference/audio/acphal/acphal_members.md)
- [ACP_COMMAND_INCREMENT_DMA_POINTER](https://docs.xbox.com/reference/audio/acphal/structs/acp_command_increment_dma_pointer.md)
- [ACP_COMMAND_INCREMENT_XMA_WRITE_BUFFER_OFFSET_READ](https://docs.xbox.com/reference/audio/acphal/structs/acp_command_increment_xma_write_buffer_offset_read.md)
- [ACP_COMMAND_UPDATE_PCM_CONTEXT_ENTRY](https://docs.xbox.com/reference/audio/acphal/structs/acp_command_update_pcm_context_entry.md)