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# ACP_MESSAGE_SHAPE_COMMAND_BLOCKED

> ACP_MESSAGE_SHAPE_COMMAND_BLOCKED

SHAPE command (SRC or DMA) context is blocked.

## Syntax

```cpp theme={null}
typedef struct ACP_MESSAGE_SHAPE_COMMAND_BLOCKED {  
    UINT32 contextIndex;  
    APU_ADDRESS flowgraph;  
} ACP_MESSAGE_SHAPE_COMMAND_BLOCKED  
```

### Members

*contextIndex*\
Type: UINT32

Index of the blocked context.

*flowgraph*\
Type: APU\_ADDRESS

Physical address of the blocked flowgraph.

## Remarks

This structure is used in the [ACP\_MESSAGE\_TYPE](https://docs.xbox.com/reference/audio/acphal/enums/acp_message_type.md) enumeration. It is also used in the `ACP_MESSAGE_TYPE_SRC_BLOCKED` and `ACP_MESSAGE_TYPE_DMA_BLOCKED` messages. For a Sample Rate Convertor (SRC) context, the message indicates that the context is waiting for source data. For a Direct Memory Access (DMA) context, the message indicates that the context is waiting for source data or that the output buffer is full.

## Requirements

**Header:** acphal.h

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

## See also

[ACP\_MESSAGE\_TYPE](https://docs.xbox.com/reference/audio/acphal/enums/acp_message_type.md)\
[AcpHal](https://docs.xbox.com/reference/audio/acphal/acphal_members.md)


## Related topics

- [ACP_MESSAGE](https://docs.xbox.com/reference/audio/acphal/structs/acp_message.md)
- [AcpHal](https://docs.xbox.com/reference/audio/acphal/acphal_members.md)
- [ACP_COMMAND_MESSAGE](https://docs.xbox.com/reference/audio/acphal/structs/acp_command_message.md)
- [ACP_MESSAGE_COMMAND_COMPLETED](https://docs.xbox.com/reference/audio/acphal/structs/acp_message_command_completed.md)
- [ACP_COMMAND_LOAD_SHAPE_FLOWGRAPH](https://docs.xbox.com/reference/audio/acphal/structs/acp_command_load_shape_flowgraph.md)