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

# Gapless API

> This file contains the Gapless module APIs.

**Header:** `spf/api/modules/gapless_api.h`

## Structures

### `event_id_gapless_early_eos_event_t`

Payload for EVENT\_ID\_EARLY\_EOS.

**Members**

<ParamField path="src_module_iid" type="uint32_t">
  Identifier for the MODULE\_ID\_WR\_SHARED\_MEM\_EP instance of the stream that is about to end.
</ParamField>

### `param_id_gapless_early_eos_delay_t`

Payload for PARAM\_ID\_EARLY\_EOS\_DELAY.

**Members**

<ParamField path="early_eos_delay_ms" type="uint32_t">
  Duration in milliseconds between the early EOS notification and the EOS notification rendered from the hardware endpoint.
</ParamField>

## Type Definitions

### `event_id_gapless_early_eos_event_t`

```cpp theme={null}
typedef struct event_id_gapless_early_eos_event_t event_id_gapless_early_eos_event_t
```

### `param_id_gapless_early_eos_delay_t`

```cpp theme={null}
typedef struct param_id_gapless_early_eos_delay_t param_id_gapless_early_eos_delay_t
```

## Macros

### `GAPLESS_MAX_INPUT_PORTS`

Maximum number of input ports supported by the Gapless module.

```c theme={null}
#define GAPLESS_MAX_INPUT_PORTS 0x2
```

### `GAPLESS_MAX_OUTPUT_PORTS`

Maximum number of output ports supported by the Gapless module.

```c theme={null}
#define GAPLESS_MAX_OUTPUT_PORTS 0x1
```

### `GAPLESS_STACK_SIZE`

Size of the stack for the Gapless module.

```c theme={null}
#define GAPLESS_STACK_SIZE 4096
```

### `EVENT_ID_EARLY_EOS`

GUID for an early end-of-stream event.

```c theme={null}
#define EVENT_ID_EARLY_EOS 0x08001126
```

### `PARAM_ID_EARLY_EOS_DELAY`

Identifier for the parameter sent to the Gapless module to configure the maximum time the client will take to switch streams.

```c theme={null}
#define PARAM_ID_EARLY_EOS_DELAY 0x0800114C
```

### `MODULE_ID_GAPLESS`

Identifier for the Gapless module, which allows for gapless switching between two input streams.

```c theme={null}
#define MODULE_ID_GAPLESS 0x0700104D
```