> ## Documentation Index
> Fetch the complete documentation index at: https://docs.xbox.com/llms.txt
> Use this file to discover all available pages before exploring further.

# ACP_COMMAND_TYPE

> ACP_COMMAND_TYPE

Enumerates the ACP command types.

## Syntax

```cpp theme={null}
enum ACP_COMMAND_TYPE    
{  
    ACP_COMMAND_TYPE_LOAD_SHAPE_FLOWGRAPH = 1,  
    ACP_COMMAND_TYPE_REGISTER_MESSAGE,  
    ACP_COMMAND_TYPE_UNREGISTER_MESSAGE,  
    ACP_COMMAND_TYPE_START_FLOWGRAPH,  
    ACP_COMMAND_TYPE_ENABLE_XMA_CONTEXT,  
    ACP_COMMAND_TYPE_ENABLE_XMA_CONTEXTS,  
    ACP_COMMAND_TYPE_DISABLE_XMA_CONTEXT,  
    ACP_COMMAND_TYPE_DISABLE_XMA_CONTEXTS,  
    ACP_COMMAND_TYPE_UPDATE_SRC_CONTEXT,  
    ACP_COMMAND_TYPE_UPDATE_EQCOMP_CONTEXT,  
    ACP_COMMAND_TYPE_UPDATE_FILTVOL_CONTEXT,  
    ACP_COMMAND_TYPE_UPDATE_DMA_CONTEXT,  
    ACP_COMMAND_TYPE_UPDATE_PCM_CONTEXT,  
    ACP_COMMAND_TYPE_UPDATE_XMA_CONTEXT,  
    ACP_COMMAND_TYPE_INCREMENT_DMA_WRITE_POINTER,  
    ACP_COMMAND_TYPE_INCREMENT_DMA_READ_POINTER,  
    ACP_COMMAND_TYPE_INCREMENT_PCM_WRITE_POINTER,  
    ACP_COMMAND_TYPE_INCREMENT_XMA_WRITE_BUFFER_OFFSET_READ,  
    ACP_COMMAND_TYPE_UPDATE_XMA_READ_BUFFER,  
    ACP_COMMAND_TYPE_UPDATE_ALL_CONTEXTS,  
    ACP_COMMAND_TYPE_UPDATE_SRC_CONTEXTS,  
    ACP_COMMAND_TYPE_UPDATE_EQCOMP_CONTEXTS,  
    ACP_COMMAND_TYPE_UPDATE_FILTVOL_CONTEXTS,  
    ACP_COMMAND_TYPE_UPDATE_DMA_READ_CONTEXTS,  
    ACP_COMMAND_TYPE_UPDATE_DMA_WRITE_CONTEXTS,  
    ACP_COMMAND_TYPE_UPDATE_PCM_CONTEXTS,  
    ACP_COMMAND_TYPE_UPDATE_XMA_CONTEXTS,  
    ACP_COMMAND_TYPE_COUNT = ACP_COMMAND_TYPE_UPDATE_XMA_CONTEXTS  
}  
```

## Constants

| Constant | Description |
| - | - |
| ACP\_COMMAND\_TYPE\_LOAD\_SHAPE\_FLOWGRAPH | Loads and processes a new flowgraph. Uses [ACP\_COMMAND\_LOAD\_SHAPE\_FLOWGRAPH](https://docs.xbox.com/reference/audio/acphal/structs/acp_command_load_shape_flowgraph.md). |
| ACP\_COMMAND\_TYPE\_REGISTER\_MESSAGE | Registers for one or more messages (see [ACP\_MESSAGE\_TYPE](https://docs.xbox.com/reference/audio/acphal/enums/acp_message_type.md)). Uses [ACP\_COMMAND\_MESSAGE](https://docs.xbox.com/reference/audio/acphal/structs/acp_command_message.md). |
| ACP\_COMMAND\_TYPE\_UNREGISTER\_MESSAGE | Unregisters one or more messages (see [ACP\_MESSAGE\_TYPE](https://docs.xbox.com/reference/audio/acphal/enums/acp_message_type.md)). Uses [ACP\_COMMAND\_MESSAGE](https://docs.xbox.com/reference/audio/acphal/structs/acp_command_message.md). |
| ACP\_COMMAND\_TYPE\_START\_FLOWGRAPH | Starts processing the flowgraph. |
| ACP\_COMMAND\_TYPE\_ENABLE\_XMA\_CONTEXT | Enables an XMA context. Not needed when used with a flowgraph. Uses [ACP\_COMMAND\_ENABLE\_OR\_DISABLE\_XMA\_CONTEXT](https://docs.xbox.com/reference/audio/acphal/structs/acp_command_enable_or_disable_xma_context.md). |
| ACP\_COMMAND\_TYPE\_ENABLE\_XMA\_CONTEXTS | Enables several XMA contexts. Not needed when used with a flowgraph. Uses [ACP\_COMMAND\_ENABLE\_OR\_DISABLE\_XMA\_CONTEXTS](https://docs.xbox.com/reference/audio/acphal/structs/acp_command_enable_or_disable_xma_contexts.md). |
| ACP\_COMMAND\_TYPE\_DISABLE\_XMA\_CONTEXT | Disables an XMA context. Not needed when used with a flowgraph. Uses [ACP\_COMMAND\_ENABLE\_OR\_DISABLE\_XMA\_CONTEXT](https://docs.xbox.com/reference/audio/acphal/structs/acp_command_enable_or_disable_xma_context.md). |
| ACP\_COMMAND\_TYPE\_DISABLE\_XMA\_CONTEXTS | Disables several XMA contexts. Not needed when used with a flowgraph. Uses [ACP\_COMMAND\_ENABLE\_OR\_DISABLE\_XMA\_CONTEXTS](https://docs.xbox.com/reference/audio/acphal/structs/acp_command_enable_or_disable_xma_contexts.md). |
| ACP\_COMMAND\_TYPE\_UPDATE\_SRC\_CONTEXT | Updates an SRC context. Uses [ACP\_COMMAND\_UPDATE\_SRC\_CONTEXT](https://docs.xbox.com/reference/audio/acphal/structs/acp_command_update_src_context.md). |
| ACP\_COMMAND\_TYPE\_UPDATE\_EQCOMP\_CONTEXT | Updates an EQ/Comp context. Uses [ACP\_COMMAND\_UPDATE\_EQCOMP\_CONTEXT](https://docs.xbox.com/reference/audio/acphal/structs/acp_command_update_eqcomp_context.md). |
| ACP\_COMMAND\_TYPE\_UPDATE\_FILTVOL\_CONTEXT | Updates a Filter/Volume context. Uses [ACP\_COMMAND\_UPDATE\_FILTVOL\_CONTEXT](https://docs.xbox.com/reference/audio/acphal/structs/acp_command_update_filtvol_context.md). |
| ACP\_COMMAND\_TYPE\_UPDATE\_DMA\_CONTEXT | Updates a DMA context. Uses [ACP\_COMMAND\_UPDATE\_DMA\_CONTEXT](https://docs.xbox.com/reference/audio/acphal/structs/acp_command_update_dma_context.md). |
| ACP\_COMMAND\_TYPE\_UPDATE\_PCM\_CONTEXT | Updates a PCM context. Uses [ACP\_COMMAND\_UPDATE\_PCM\_CONTEXT](https://docs.xbox.com/reference/audio/acphal/structs/acp_command_update_pcm_context.md). |
| ACP\_COMMAND\_TYPE\_UPDATE\_XMA\_CONTEXT | Updates an XMA context. Uses [ACP\_COMMAND\_UPDATE\_XMA\_CONTEXT](https://docs.xbox.com/reference/audio/acphal/structs/acp_command_update_xma_context.md). |
| ACP\_COMMAND\_TYPE\_INCREMENT\_DMA\_WRITE\_POINTER | Updates a DMA write pointer. Uses [ACP\_COMMAND\_INCREMENT\_DMA\_POINTER](https://docs.xbox.com/reference/audio/acphal/structs/acp_command_increment_dma_pointer.md). |
| ACP\_COMMAND\_TYPE\_INCREMENT\_DMA\_READ\_POINTER | Updates a DMA read pointer. Uses [ACP\_COMMAND\_INCREMENT\_DMA\_POINTER](https://docs.xbox.com/reference/audio/acphal/structs/acp_command_increment_dma_pointer.md). |
| ACP\_COMMAND\_TYPE\_INCREMENT\_PCM\_WRITE\_POINTER | Updates a PCM context write pointer. Uses [ACP\_COMMAND\_INCREMENT\_PCM\_WRITE\_POINTER](https://docs.xbox.com/reference/audio/acphal/structs/acp_command_increment_pcm_write_pointer.md). |
| ACP\_COMMAND\_TYPE\_INCREMENT\_XMA\_WRITE\_BUFFER\_OFFSET\_READ | Increments the output buffer read offset of a SHAPE\_XMA\_CONTEXT. Uses [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\_TYPE\_UPDATE\_XMA\_READ\_BUFFER | Updates all the elements of a SHAPE\_XMA\_CONTEXT required for streaming encoded data. Uses [ACP\_COMMAND\_UPDATE\_XMA\_READ\_BUFFER](https://docs.xbox.com/reference/audio/acphal/structs/acp_command_update_xma_read_buffer.md). |
| ACP\_COMMAND\_TYPE\_UPDATE\_ALL\_CONTEXTS | Updates all contexts. Uses [ACP\_COMMAND\_UPDATE\_CONTEXTS](https://docs.xbox.com/reference/audio/acphal/structs/acp_command_update_contexts.md). |
| ACP\_COMMAND\_TYPE\_UPDATE\_SRC\_CONTEXTS | Updates a block of SRC contexts. Uses [ACP\_COMMAND\_UPDATE\_CONTEXTS](https://docs.xbox.com/reference/audio/acphal/structs/acp_command_update_contexts.md). |
| ACP\_COMMAND\_TYPE\_UPDATE\_EQCOMP\_CONTEXTS | Updates a block of EQCOMP contexts. Uses [ACP\_COMMAND\_UPDATE\_CONTEXTS](https://docs.xbox.com/reference/audio/acphal/structs/acp_command_update_contexts.md). |
| ACP\_COMMAND\_TYPE\_UPDATE\_FILTVOL\_CONTEXTS | Updates a block of Filter/Volume contexts. Uses [ACP\_COMMAND\_UPDATE\_CONTEXTS](https://docs.xbox.com/reference/audio/acphal/structs/acp_command_update_contexts.md). |
| ACP\_COMMAND\_TYPE\_UPDATE\_DMA\_READ\_CONTEXTS | Updates a block of DMA read contexts. Uses [ACP\_COMMAND\_UPDATE\_CONTEXTS](https://docs.xbox.com/reference/audio/acphal/structs/acp_command_update_contexts.md). |
| ACP\_COMMAND\_TYPE\_UPDATE\_DMA\_WRITE\_CONTEXTS | Updates a block of DMA write contexts. Uses [ACP\_COMMAND\_UPDATE\_CONTEXTS](https://docs.xbox.com/reference/audio/acphal/structs/acp_command_update_contexts.md). |
| ACP\_COMMAND\_TYPE\_UPDATE\_PCM\_CONTEXTS | Updates a block of PCM contexts. Uses [ACP\_COMMAND\_UPDATE\_CONTEXTS](https://docs.xbox.com/reference/audio/acphal/structs/acp_command_update_contexts.md). |
| ACP\_COMMAND\_TYPE\_UPDATE\_XMA\_CONTEXTS | Updates a block of XMA contexts. Uses [ACP\_COMMAND\_UPDATE\_CONTEXTS](https://docs.xbox.com/reference/audio/acphal/structs/acp_command_update_contexts.md). |
| ACP\_COMMAND\_TYPE\_COUNT | Count of command types; not an actual command. |

## Remarks

By using the command types in this enumeration, your application can drive the Audio Control Processor (ACP). For details, see [Overview of ACP](https://docs.xbox.com/build/console-features/audio/overviews/acp-overview.md). For details on the architecture of the Scalable Hardware Audio Processing Engine (SHAPE), see [Overview of SHAPE](https://docs.xbox.com/build/console-features/audio/overviews/shape-overview.md).

## Requirements

**Header:** acphal.h

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

## See also

[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_MESSAGE](https://docs.xbox.com/reference/audio/acphal/structs/acp_command_message.md)
- [ACP_COMMAND_UPDATE_DMA_CONTEXT](https://docs.xbox.com/reference/audio/acphal/structs/acp_command_update_dma_context.md)
- [ACP_COMMAND_UPDATE_EQCOMP_CONTEXT](https://docs.xbox.com/reference/audio/acphal/structs/acp_command_update_eqcomp_context.md)
- [ACP_COMMAND_UPDATE_FILTVOL_CONTEXT](https://docs.xbox.com/reference/audio/acphal/structs/acp_command_update_filtvol_context.md)
- [ACP_COMMAND_INCREMENT_DMA_POINTER](https://docs.xbox.com/reference/audio/acphal/structs/acp_command_increment_dma_pointer.md)