diff --git a/multimedia/audio_framework/audio_manager/native_audio_session_manager.h b/multimedia/audio_framework/audio_manager/native_audio_session_manager.h
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+/*
+ * Copyright (c) 2024 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * @addtogroup OHAudio
+ * @{
+ *
+ * @brief Provide the definition of the C interface for the audio module.
+ *
+ * @syscap SystemCapability.Multimedia.Audio.Core
+ *
+ * @since 12
+ * @version 1.0
+ */
+
+/**
+ * @file native_audio_session_manager.h
+ *
+ * @brief Declare audio session manager related interfaces.
+ *
+ * This file interfaces are used for the creation of audioSessionManager
+ * as well as activating/deactivating the audio session
+ * as well as checking and listening the audio session decativated events.
+ *
+ * @library libohaudio.so
+ * @syscap SystemCapability.Multimedia.Audio.Core
+ * @since 12
+ * @version 1.0
+ */
+
+#ifndef NATIVE_AUDIO_SESSION_MANAGER_H
+#define NATIVE_AUDIO_SESSION_MANAGER_H
+
+#include "native_audio_common.h"
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief Declare the audio session manager.
+ * The handle of audio session manager is used for audio session related functions.
+ *
+ * @since 12
+ */
+typedef struct OH_AudioSessionManager OH_AudioSessionManager;
+
+/**
+ * @brief Declare the audio concurrency modes.
+ *
+ * @since 12
+ */
+typedef enum {
+    /**
+     * @brief default mode
+     */
+    CONCURRENCY_DEFAULT = 0,
+
+    /**
+     * @brief mix with others mode
+     */
+    CONCURRENCY_MIX_WITH_OTHERS = 1,
+
+    /**
+     * @brief duck others mode
+     */
+    CONCURRENCY_DUCK_OTHERS = 2,
+
+    /**
+     * @brief pause others mode
+     */
+    CONCURRENCY_PAUSE_OTHERS = 3,
+} OH_AudioSession_ConcurrencyMode;
+
+/**
+ * @brief Declare the audio deactivated reasons.
+ *
+ * @since 12
+ */
+typedef enum {
+    /**
+     * @brief deactivated because of lower priority
+     */
+    DEACTIVATED_LOWER_PRIORITY = 0,
+
+    /**
+     * @brief deactivated because of timing out
+     */
+    DEACTIVATED_TIMEOUT = 1,
+} OH_AudioSession_DeactivatedReason;
+
+/**
+ * @brief declare the audio session strategy
+ *
+ * @since 12
+ */
+typedef struct OH_AudioSession_Strategy {
+    /**
+     * @brief audio session concurrency mode
+     */
+    OH_AudioSession_ConcurrencyMode concurrencyMode;
+} OH_AudioSession_Strategy;
+
+/**
+ * @brief declare the audio session deactivated event
+ *
+ * @since 12
+ */
+typedef struct OH_AudioSession_DeactivatedEvent {
+    /**
+     * @brief audio session deactivated reason
+     */
+    OH_AudioSession_DeactivatedReason reason;
+} OH_AudioSession_DeactivatedEvent;
+
+/**
+ * @brief This function pointer will point to the callback function that
+ * is used to return the audio session deactivated event.
+ *
+ * @param event the {@link #OH_AudioSession_DeactivatedEvent} deactivated triggering event.
+ * @since 12
+ */
+typedef int32_t (*OH_AudioSession_DeactivatedCallback) (
+    OH_AudioSession_DeactivatedEvent event);
+
+/**
+ * @brief Fetch the audio session manager handle.
+ * The audio session manager handle should be the first parameter in audio session related functions
+ *
+ * @param audioSessionManager the {@link #OH_AudioSessionManager}
+ * which will be returned as the output parameter
+ * @return {@link #AUDIOCOMMON_RESULT_SUCCESS} if execution succeeds
+ * or {@link #AUDIOCOMMON_RESULT_ERROR_SYSTEM} if system state error
+ * @since 12
+ */
+OH_AudioCommon_Result OH_AudioManager_GetAudioSessionManager(
+    OH_AudioSessionManager **audioSessionManager);
+
+/**
+ * @brief Activate the audio session for the current pid application.
+ *
+ * @param audioSessionManager the {@link #OH_AudioSessionManager}
+ * returned by the {@link #OH_AudioManager_GetAudioSessionManager}
+ * @param strategy pointer of {@link #OH_AudioSession_Strategy}
+ * which is used for setting audio session strategy
+ * @return {@link #AUDIOCOMMON_RESULT_SUCCESS} if execution succeeds
+ * or {@link #AUDIOCOMMON_REULT_INVALID_PARAM} if parameter validation fails
+ * or {@link #AUDIOCOMMON_RESULT_ERROR_ILLEGAL_STATE} if system illegal state
+ * @since 12
+ */
+OH_AudioCommon_Result OH_AudioSessionManager_ActivateAudioSession(
+    OH_AudioSessionManager *audioSessionManager, const OH_AudioSession_Strategy *strategy);
+
+/**
+ * @brief Deactivate the audio session for the current pid application.
+ *
+ * @param audioSessionManager the {@link #OH_AudioSessionManager}
+ * returned by the {@link #OH_AudioManager_GetAudioSessionManager}
+ * @return {@link #AUDIOCOMMON_RESULT_SUCCESS} if execution succeeds
+ * or {@link #AUDIOCOMMON_REULT_INVALID_PARAM} if parameter validation fails
+ * or {@link #AUDIOCOMMON_RESULT_ERROR_ILLEGAL_STATE} if system illegal state
+ * @since 12
+ */
+OH_AudioCommon_Result OH_AudioSessionManager_DeactivateAudioSession(
+    OH_AudioSessionManager *audioSessionManager);
+
+/**
+ * @brief Querying whether the current pid application has an activated audio session.
+ *
+ * @param audioSessionManager the {@link #OH_AudioSessionManager}
+ * returned by the {@link #OH_AudioManager_GetAudioSessionManager}
+ * @return True when the current pid application has an activated audio session
+ * False when it does not
+ * @since 12
+ */
+bool OH_AudioSessionManager_IsAudioSessionActivated(
+    OH_AudioSessionManager *audioSessionManager);
+
+/**
+ * @brief Register the audio session deactivated event callback.
+ *
+ * @param audioSessionManager the {@link #OH_AudioSessionManager}
+ * returned by the {@link #OH_AudioManager_GetAudioSessionManager}
+ * @param callback the {@link #OH_AudioSession_DeactivatedCallback} which is used
+ * to receive the deactivated event
+ * @return {@link #AUDIOCOMMON_RESULT_SUCCESS} if execution succeeds
+ * or {@link #AUDIOCOMMON_RESULT_ERROR_INVALID_PARAM} if parameter validation fails
+ * @since 12
+ */
+OH_AudioCommon_Result OH_AudioSessionManager_RegisterSessionDeactivatedCallback(
+    OH_AudioSessionManager *audioSessionManager, OH_AudioSession_DeactivatedCallback callback);
+
+/**
+ * @brief Unregister the audio session deactivated event callback.
+ *
+ * @param audioSessionManager the {@link #OH_AudioSessionManager}
+ * returned by the {@link #OH_AudioManager_GetAudioSessionManager}
+ * @param callback the {@link #OH_AudioSession_DeactivatedCallback} which is used
+ * to receive the deactivated event
+ * @return {@link #AUDIOCOMMON_RESULT_SUCCESS} if execution succeeds
+ * or {@link #AUDIOCOMMON_RESULT_ERROR_INVALID_PARAM} if parameter validation fails
+ * @since 12
+ */
+OH_AudioCommon_Result OH_AudioSessionManager_UnregisterSessionDeactivatedCallback(
+    OH_AudioSessionManager *audioSessionManager, OH_AudioSession_DeactivatedCallback callback);
+#ifdef __cplusplus
+}
+#endif
+/** @} */
+#endif // NATIVE_AUDIO_ROUTING_MANAGER_H
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