*/
int tts_set_server_tts(tts_h tts, const char* credential);
+/**
+ * @brief Adds a sound stream to the queue.
+ * @since_tizen 4.0
+ *
+ * @param[in] tts The TTS handle
+ * @param[in] event An event about pcm buffer (-1: error, 1: start, 2: continue, 3: finish)
+ * @param[in] data The pcm data buffer
+ * @param[in] data_size The data size of pcm data buffer
+ * @param[in] audio_type The audio type of pcm (0: signed 16-bit, 1: unsigned 8-bit)
+ * @param[in] rate The sampling rate of pcm
+ * @return @c 0 on success,
+ * otherwise a negative error value
+ * @retval #TTS_ERROR_NONE Successful
+ * @retval #TTS_ERROR_INVALID_PARAMETER Invalid parameter
+ * @retval #TTS_ERROR_INVALID_STATE Invalid state
+ * @retval #TTS_ERROR_OPERATION_FAILED Operation failure
+ * @retval #TTS_ERROR_NOT_SUPPORTED TTS NOT supported
+ * @retval #TTS_ERROR_PERMISSION_DENIED Permission denied
+ * @pre The state should be #TTS_STATE_READY, #TTS_STATE_PLAYING, or #TTS_STATE_PAUSED.
+ * @see tts_play_pcm()
+ * @see tts_stop_pcm()
+*/
+int tts_add_pcm(tts_h tts, int event, const void* data, unsigned int data_size, int audio_type, int rate);
+
+/**
+ * @brief Request to play pcm.
+ * @since_tizen 4.0
+ *
+ * @param[in] tts The TTS handle
+ * @return @c 0 on success,
+ * otherwise a negative error value
+ * @retval #TTS_ERROR_NONE Successful
+ * @retval #TTS_ERROR_INVALID_PARAMETER Invalid parameter
+ * @retval #TTS_ERROR_INVALID_STATE Invalid state
+ * @retval #TTS_ERROR_OPERATION_FAILED Operation failure
+ * @retval #TTS_ERROR_NOT_SUPPORTED TTS NOT supported
+ * @retval #TTS_ERROR_PERMISSION_DENIED Permission denied
+ * @pre The state should be #TTS_STATE_READY or #TTS_STATE_PAUSED.
+ * @see tts_add_pcm()
+ * @see tts_stop_pcm()
+*/
+int tts_play_pcm(tts_h tts);
+
+/**
+ * @brief Request to stop pcm.
+ * @since_tizen 4.0
+ *
+ * @param[in] tts The TTS handle
+ * @return @c 0 on success,
+ * otherwise a negative error value
+ * @retval #TTS_ERROR_NONE Successful
+ * @retval #TTS_ERROR_INVALID_PARAMETER Invalid parameter
+ * @retval #TTS_ERROR_INVALID_STATE Invalid state
+ * @retval #TTS_ERROR_OPERATION_FAILED Operation failure
+ * @retval #TTS_ERROR_NOT_SUPPORTED TTS NOT supported
+ * @retval #TTS_ERROR_PERMISSION_DENIED Permission denied
+ * @pre The state should be #TTS_STATE_READY, #TTS_STATE_PLAYING, or #TTS_STATE_PAUSED.
+ * @see tts_play_pcm()
+ * @see tts_add_pcm()
+*/
+int tts_stop_pcm(tts_h tts);
#ifdef __cplusplus
}