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Update TTS guide related to completed callback #1917

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May 17, 2024
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Update TTS guide related to completed callback #1917

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11293a5
Update TTS guide related to completed callback
syeonholic Jan 16, 2024
0fa890f
Update TTS C# guide related to UtteranceCompleted event handler
syeonholic Jan 16, 2024
497f952
Change capital letters and descriptions
syeonholic May 16, 2024
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19 changes: 18 additions & 1 deletion docs/application/dotnet/guides/uix/tts.md
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Expand Up @@ -243,7 +243,24 @@ Event handlers can be set for the following events of the [Tizen.Uix.Tts.TtsClie

- Utterance started or completed

If you add text in TTS, that text is handled as an utterance and it obtains its own ID. After you request the TTS process to start, the text is synthesized by an engine and played. To get a notification when an utterance is started or completed, register event handlers for the `UtteranceStarted` and `UtteranceCompleted` events, respectively:
If you add text in TTS, that text is handled as an utterance and it obtains its own ID. After you request the TTS process to start, the text is synthesized by an engine and played. Each event handler is invoked in the following cases:

| Event handler | Invoked when | TTS state |
| :------------------: | :---------------------------------------: | :-------: |
| `UtteranceStarted` | Playing the synthesized audio is started | `Ready` > `Playing` |
| `UtteranceCompleted` | Playing the synthesized audio is finished | `Playing` (The state is NOT changed until `Stop()` is called.) |

> [!NOTE]
> `UtteranceCompleted` is NOT invoked when the following occurs:
>
> (1) Your application calls `Stop()`.
>
> (2) Playing the synthesized audio is stopped by another application.
>
> Although the `UtteranceCompleted` event handler is not invoked, a `StateChanged` event handler will be invoked. (The state will be changed from `Playing` to `Ready`.)


To get a notification when an utterance is started or completed, register event handlers for the `UtteranceStarted` and `UtteranceCompleted` events, respectively:

```csharp
/// Utterance started event handler
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19 changes: 18 additions & 1 deletion docs/application/native/guides/text-input/tts.md
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Expand Up @@ -262,7 +262,24 @@ To set and unset callbacks, follow these steps:

- Utterance started or completed

If you add text in TTS, that text is handled as an utterance and it obtains its own ID. After you request the TTS process to start, the text is synthesized by an engine and played out. To get a notification when an utterance is started or completed, set the respective callbacks:
If you add text in TTS, that text is handled as an utterance and it obtains its own ID. After you request the TTS process to start, the text is synthesized by an engine and played out. Each callback is invoked in the following cases:

| Callback | Invoked when | TTS state |
| :--------------------------: | :---------------------------------------: | :-------: |
| Utterance started callback | Playing the synthesized audio is started | `TTS_STATE_READY` > `TTS_STATE_PLAYING` |
| Utterance completed callback | Playing the synthesized audio is finished | `TTS_STATE_PLAYING` (The state is NOT changed until `tts_stop()` is called.) |

> [!NOTE]
> Utterance completed callback is NOT invoked when the following occurs:
>
> (1) Your application calls `tts_stop()`.
>
> (2) Playing the synthesized audio is stopped by another application.
>
> Although the utterance completed callback is not invoked, a state changed callback will be invoked. (The state will be changed from `TTS_STATE_PLAYING` to `TTS_STATE_READY`.)


To get a notification when an utterance is started or completed, set the respective callbacks:

```cpp
/* Started callback */
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