harmony 鸿蒙OHAVSession
OHAVSession
Overview
The OHAVSession module defines the C APIs of the playback control module.
You can use OHAVSession to access AVSession as a provider. For details about the development guide and samples, see AVSession Provider.
System capability: SystemCapability.Multimedia.AVSession.Core
Since: 13
Summary
Files
| Name | Description |
|---|---|
| native_avmetadata.h | Declares the definitions of playback control metadata. |
| native_avsession.h | Declares the AVSession definition, which can be used to set metadata, playback state, and other information. |
| native_avsession_errors.h | Declares the playback control error codes. |
Structs
| Name | Description |
|---|---|
| struct AVSession_PlaybackPosition | Describes the information related to the playback position. |
Types
| Name | Description |
|---|---|
| typedef struct OH_AVMetadataBuilderStruct OH_AVMetadataBuilder | Defines a struct for the session metadata builder. The builder is used to construct session metadata. |
| typedef struct OH_AVMetadataStruct OH_AVMetadata | Defines a struct for the session metadata. It is an AVMetadata instance set for a media asset. |
| typedef struct AVSession_PlaybackPosition AVSession_PlaybackPosition | Defines a struct for the information related to the playback position. |
| typedef enum AVSession_ControlCommand AVSession_ControlCommand | Defines an enum for the playback control commands. |
| typedef AVSessionCallback_Result(* OH_AVSessionCallback_OnCommand) (OH_AVSession *session, AVSession_ControlCommand command, void *userData) | Defines a callback for a common playback control command. |
| typedef AVSessionCallback_Result(* OH_AVSessionCallback_OnFastForward) (OH_AVSession *session, uint32_t seekTime, void *userData) | Defines a callback for the fast-forward operation. |
| typedef AVSessionCallback_Result(* OH_AVSessionCallback_OnRewind) (OH_AVSession *session, uint32_t seekTime, void *userData) | Defines a callback for the rewind operation. |
| typedef AVSessionCallback_Result(* OH_AVSessionCallback_OnSeek) (OH_AVSession *session, uint64_t seekTime, void *userData) | Defines a callback for the seek operation. |
| typedef AVSessionCallback_Result(* OH_AVSessionCallback_OnSetLoopMode) (OH_AVSession *session, AVSession_LoopMode curLoopMode, void *userData) | Defines a callback for the operation of setting the loop mode. |
| typedef AVSessionCallback_Result(* OH_AVSessionCallback_OnToggleFavorite) (OH_AVSession *session, const char *assetId, void *userData) | Defines a callback for the operation of favoriting a media asset. |
| typedef struct OH_AVSession OH_AVSession | Defines a struct for the playback control session object. |
Enums
| Name | Description |
|---|---|
| AVMetadata_Result { AVMETADATA_SUCCESS = 0, AVMETADATA_ERROR_INVALID_PARAM = 1, AVMETADATA_ERROR_NO_MEMORY = 2 } |
Enumerates the error codes related to metadata operations. |
| AVMetadata_SkipIntervals { SECONDS_10 = 10, SECONDS_15 = 15, SECONDS_30 = 30 } |
Enumerates the fast-forward or rewind intervals supported by the media session. |
| AVMetadata_DisplayTag { AVSESSION_DISPLAYTAG_AUDIO_VIVID = 1 } | Enumerates the display tags of the media asset. The display tag is a special type identifier of the media audio source. |
| AVSession_Type { SESSION_TYPE_AUDIO = 0, SESSION_TYPE_VIDEO = 1, SESSION_TYPE_VOICE_CALL = 2, SESSION_TYPE_VIDEO_CALL = 3 } |
Enumerates the session types. |
| AVSession_PlaybackState { PLAYBACK_STATE_INITIAL = 0, PLAYBACK_STATE_PREPARING = 1, PLAYBACK_STATE_PLAYING = 2, PLAYBACK_STATE_PAUSED = 3, PLAYBACK_STATE_FAST_FORWARDING = 4, PLAYBACK_STATE_REWINDED = 5, PLAYBACK_STATE_STOPPED = 6, PLAYBACK_STATE_COMPLETED = 7, PLAYBACK_STATE_RELEASED = 8, PLAYBACK_STATE_ERROR = 9, PLAYBACK_STATE_IDLE = 10, PLAYBACK_STATE_BUFFERING = 11, PLAYBACK_STATE_MAX = 12 } |
Enumerates the media playback states. |
| AVSession_LoopMode { LOOP_MODE_SEQUENCE = 0, LOOP_MODE_SINGLE = 1, LOOP_MODE_LIST = 2, LOOP_MODE_SHUFFLE = 3, LOOP_MODE_CUSTOM = 4 } |
Enumerates the loop modes of media playback. |
| AVSession_ControlCommand { CONTROL_CMD_INVALID = -1, CONTROL_CMD_PLAY = 0, CONTROL_CMD_PAUSE = 1, CONTROL_CMD_STOP = 2, CONTROL_CMD_PLAY_NEXT = 3, CONTROL_CMD_PLAY_PREVIOUS = 4 } |
Enumerates the playback control commands. |
| AVSessionCallback_Result { AVSESSION_CALLBACK_RESULT_SUCCESS = 0, AVSESSION_CALLBACK_RESULT_FAILURE = -1 } |
Enumerates the callback execution results. |
| AVSession_ErrCode { AV_SESSION_ERR_SUCCESS = 0, AV_SESSION_ERR_INVALID_PARAMETER = 401, AV_SESSION_ERR_SERVICE_EXCEPTION = 6600101, AV_SESSION_ERR_CODE_SESSION_NOT_EXIST = 6600102, AV_SESSION_ERR_CODE_COMMAND_INVALID = 6600105, AV_SESSION_ERR_CODE_SESSION_INACTIVE = 6600106, AV_SESSION_ERR_CODE_MESSAGE_OVERLOAD = 6600107 } |
Enumerates the playback control error codes. |
Functions
Type Description
AVSession_ControlCommand
typedef enum AVSession_ControlCommand AVSession_ControlCommand
Description
Defines an enum for the playback control commands.
Since: 13
AVSession_PlaybackPosition
typedef struct AVSession_PlaybackPosition AVSession_PlaybackPosition
Description
Defines a struct for the information related to the playback position.
Since: 13
OH_AVMetadata
typedef struct OH_AVMetadataStruct OH_AVMetadata
Description
Defines a struct for the session metadata. It is an AVMetadata instance set for a media asset.
Since: 13
OH_AVMetadataBuilder
typedef struct OH_AVMetadataBuilderStruct OH_AVMetadataBuilder
Description
Defines a struct for the session metadata builder. The builder is used to construct session metadata.
Since: 13
OH_AVSession
typedef struct OH_AVSession OH_AVSession
Description
Defines a struct for the playback control session object.
You can use OH_AVSession_Create to create such an object.
Since: 13
OH_AVSessionCallback_OnCommand
typedef AVSessionCallback_Result (*OH_AVSessionCallback_OnCommand)(OH_AVSession* session, AVSession_ControlCommand command, void* userData)
Description
Defines a callback for a common playback control command.
Since: 13
OH_AVSessionCallback_OnFastForward
typedef AVSessionCallback_Result (*OH_AVSessionCallback_OnFastForward)(OH_AVSession* session, uint32_t seekTime, void* userData)
Description
Defines a callback for the fast-forward operation.
Since: 13
OH_AVSessionCallback_OnRewind
typedef AVSessionCallback_Result (*OH_AVSessionCallback_OnRewind)(OH_AVSession* session, uint32_t seekTime, void* userData)
Description
Defines a callback for the rewind operation.
Since: 13
OH_AVSessionCallback_OnSeek
typedef AVSessionCallback_Result (*OH_AVSessionCallback_OnSeek)(OH_AVSession* session, uint64_t seekTime, void* userData)
Description
Defines a callback for the seek operation.
Since: 13
OH_AVSessionCallback_OnSetLoopMode
typedef AVSessionCallback_Result (*OH_AVSessionCallback_OnSetLoopMode)(OH_AVSession* session, AVSession_LoopMode curLoopMode, void* userData)
Description
Defines a callback for the operation of setting the loop mode.
Since: 13
OH_AVSessionCallback_OnToggleFavorite
typedef AVSessionCallback_Result (*OH_AVSessionCallback_OnToggleFavorite)(OH_AVSession* session, const char* assetId, void* userData)
Description
Defines a callback for the operation of favoriting a media asset.
Since: 13
Enums
AVMetadata_DisplayTag
enum AVMetadata_DisplayTag
Description
Enumerates the display tags of the media asset. The display tag is a special type identifier of the media audio source.
Since: 13
| Value | Description |
|---|---|
| AVSESSION_DISPLAYTAG_AUDIO_VIVID | AUDIO VIVID. |
AVMetadata_Result
enum AVMetadata_Result
Description
Enumerates the error codes related to metadata operations.
Since: 13
| Value | Description |
|---|---|
| AVMETADATA_SUCCESS | Operation successful. |
| AVMETADATA_ERROR_INVALID_PARAM | Incorrect parameter. |
| AVMETADATA_ERROR_NO_MEMORY | Insufficient memory. |
AVMetadata_SkipIntervals
enum AVMetadata_SkipIntervals
Description
Enumerates the fast-forward or rewind intervals supported by the media session.
Since: 13
| Value | Description |
|---|---|
| SECONDS_10 | The time is 10 seconds. |
| SECONDS_15 | The time is 15 seconds. |
| SECONDS_30 | The time is 30 seconds. |
AVSession_ControlCommand
enum AVSession_ControlCommand
Description
Enumerates the playback control commands.
Since: 13
| Value | Description |
|---|---|
| CONTROL_CMD_INVALID | Invalid control command. |
| CONTROL_CMD_PLAY | Play command. |
| CONTROL_CMD_PAUSE | Pause command. |
| CONTROL_CMD_STOP | Stop command. |
| CONTROL_CMD_PLAY_NEXT | Command for playing the next media asset. |
| CONTROL_CMD_PLAY_PREVIOUS | Command for playing the previous media asset. |
AVSession_ErrCode
enum AVSession_ErrCode
Description
Enumerates the playback control error codes.
Since: 13
| Value | Description |
|---|---|
| AV_SESSION_ERR_SUCCESS | The operation is successful. |
| AV_SESSION_ERR_INVALID_PARAMETER | Parameter check fails. |
| AV_SESSION_ERR_SERVICE_EXCEPTION | The session server is abnormal. |
| AV_SESSION_ERR_CODE_SESSION_NOT_EXIST | The session does not exist. |
| AV_SESSION_ERR_CODE_COMMAND_INVALID | The session command is invalid. |
| AV_SESSION_ERR_CODE_SESSION_INACTIVE | The session is not activated. |
| AV_SESSION_ERR_CODE_MESSAGE_OVERLOAD | Command and message overflow. |
AVSession_LoopMode
enum AVSession_LoopMode
Description
Enumerates the loop modes of media playback.
Since: 13
| Value | Description |
|---|---|
| LOOP_MODE_SEQUENCE | Sequential playback. |
| LOOP_MODE_SINGLE | Single loop. |
| LOOP_MODE_LIST | Playlist loop. |
| LOOP_MODE_SHUFFLE | Shuffle. |
| LOOP_MODE_CUSTOM | Custom playback. |
AVSession_PlaybackState
enum AVSession_PlaybackState
Description
Enumerates the media playback states.
Since: 13
| Value | Description |
|---|---|
| PLAYBACK_STATE_INITIAL | Initial state. |
| PLAYBACK_STATE_PREPARING | Ready. |
| PLAYBACK_STATE_PLAYING | Playing. |
| PLAYBACK_STATE_PAUSED | Paused. |
| PLAYBACK_STATE_FAST_FORWARDING | Fast-forwarding. |
| PLAYBACK_STATE_REWINDED | Rewinded. |
| PLAYBACK_STATE_STOPPED | Stopped. |
| PLAYBACK_STATE_COMPLETED | Playback complete. |
| PLAYBACK_STATE_RELEASED | Released. |
| PLAYBACK_STATE_ERROR | Error. |
| PLAYBACK_STATE_IDLE | Idle. |
| PLAYBACK_STATE_BUFFERING | Buffering. |
| PLAYBACK_STATE_MAX | Maximum value. (Error code 401 is returned in this case.) |
AVSession_Type
enum AVSession_Type
Description
Enumerates the session types.
Since: 13
| Value | Description |
|---|---|
| SESSION_TYPE_AUDIO | Audio. |
| SESSION_TYPE_VIDEO | Video. |
| SESSION_TYPE_VOICE_CALL | Audio call. |
| SESSION_TYPE_VIDEO_CALL | Video call. |
AVSessionCallback_Result
enum AVSessionCallback_Result
Description
Enumerates the callback execution results.
Since: 13
| Value | Description |
|---|---|
| AVSESSION_CALLBACK_RESULT_SUCCESS | The operation is successful. |
| AVSESSION_CALLBACK_RESULT_FAILURE | The operation fails. |
Function Description
OH_AVMetadata_Destroy()
AVMetadata_Result OH_AVMetadata_Destroy(OH_AVMetadata* avMetadata)
Description
Releases an OH_AVMetadata object.
Since: 13
Parameters
| Name | Description |
|---|---|
| avMetadata | Pointer to an OH_AVMetadata object. |
Returns
Returns one of the following result codes defined in AVMetadata_Result:
AVMETADATA_SUCCESS: The function is executed successfully.
AVMETADATA_ERROR_INVALID_PARAM: avMetadata is a null pointer.
OH_AVMetadataBuilder_Create()
AVMetadata_Result OH_AVMetadataBuilder_Create(OH_AVMetadataBuilder** builder)
Description
Creates a metadata builder.
Since: 13
Parameters
| Name | Description |
|---|---|
| builder | Double pointer to the builder created. |
Returns
Returns one of the following result codes defined in AVMetadata_Result:
AVMETADATA_SUCCESS: The function is executed successfully.
AVMETADATA_ERROR_INVALID_PARAM: builder is a null pointer.
AVMETADATA_ERROR_NO_MEMORY: There is no sufficient memory.
OH_AVMetadataBuilder_Destroy()
AVMetadata_Result OH_AVMetadataBuilder_Destroy(OH_AVMetadataBuilder* builder)
Description
Destroys a metadata builder.
Since: 13
Parameters
| Name | Description |
|---|---|
| builder | Pointer to an OH_AVMetadataBuilder instance. |
Returns
Returns one of the following result codes defined in AVMetadata_Result:
AVMETADATA_SUCCESS: The function is executed successfully.
AVMETADATA_ERROR_INVALID_PARAM: builder is a null pointer.
OH_AVMetadataBuilder_GenerateAVMetadata()
AVMetadata_Result OH_AVMetadataBuilder_GenerateAVMetadata(OH_AVMetadataBuilder* builder, OH_AVMetadata** avMetadata)
Description
Generates an OH_AVMetadata object.
Since: 13
Parameters
| Name | Description |
|---|---|
| builder | Pointer to an OH_AVMetadataBuilder instance. |
| avMetadata | Double pointer to the OH_AVMetadata object created. |
Returns
Returns one of the following result codes defined in AVMetadata_Result:
AVMETADATA_SUCCESS: The function is executed successfully.
AVMETADATA_ERROR_NO_MEMORY: The memory is insufficient.
AVMETADATA_ERROR_INVALID_PARAM:
builder is a null pointer.
avMetadata is a null pointer.
OH_AVMetadataBuilder_SetAlbum()
AVMetadata_Result OH_AVMetadataBuilder_SetAlbum(OH_AVMetadataBuilder* builder, const char* album)
Description
Sets an album name for the media asset.
Since: 13
Parameters
| Name | Description |
|---|---|
| builder | Pointer to an OH_AVMetadataBuilder instance. |
| album | Pointer to the album name. |
Returns
Returns one of the following result codes defined in AVMetadata_Result:
AVMETADATA_SUCCESS: The function is executed successfully.
AVMETADATA_ERROR_INVALID_PARAM: 1. builder is a null pointer.
- album is a null pointer.
OH_AVMetadataBuilder_SetArtist()
AVMetadata_Result OH_AVMetadataBuilder_SetArtist(OH_AVMetadataBuilder* builder, const char* artist)
Description
Sets an artist for the media asset.
Since: 13
Parameters
| Name | Description |
|---|---|
| builder | Pointer to an OH_AVMetadataBuilder instance. |
| artist | Pointer to the artist. |
Returns
Returns one of the following result codes defined in AVMetadata_Result:
AVMETADATA_SUCCESS: The function is executed successfully.
AVMETADATA_ERROR_INVALID_PARAM: 1. builder is a null pointer.
- artist is a null pointer.
OH_AVMetadataBuilder_SetAssetId()
AVMetadata_Result OH_AVMetadataBuilder_SetAssetId(OH_AVMetadataBuilder* builder, const char* assetId)
Description
Sets the ID of the media asset.
Since: 13
Parameters
| Name | Description |
|---|---|
| builder | Pointer to an OH_AVMetadataBuilder instance. |
| assetId | Pointer to the asset ID. |
Returns
Returns one of the following result codes defined in AVMetadata_Result:
AVMETADATA_SUCCESS: The function is executed successfully.
AVMETADATA_ERROR_INVALID_PARAM:
builder is a null pointer.
assetId is a null pointer.
OH_AVMetadataBuilder_SetAuthor()
AVMetadata_Result OH_AVMetadataBuilder_SetAuthor(OH_AVMetadataBuilder* builder, const char* author)
Description
Sets an author for the media asset.
Since: 13
Parameters
| Name | Description |
|---|---|
| builder | Pointer to an OH_AVMetadataBuilder instance. |
| author | Pointer to the author. |
Returns
Returns one of the following result codes defined in AVMetadata_Result:
AVMETADATA_SUCCESS: The function is executed successfully.
AVMETADATA_ERROR_INVALID_PARAM:
builder is a null pointer.
author is a null pointer.
OH_AVMetadataBuilder_SetComposer()
AVMetadata_Result OH_AVMetadataBuilder_SetComposer(OH_AVMetadataBuilder* builder, const char* composer)
Description
Sets a composer for the media asset.
Since: 13
Parameters
| Name | Description |
|---|---|
| builder | Pointer to an OH_AVMetadataBuilder instance. |
| composer | Pointer to the composer. |
Returns
Returns one of the following result codes defined in AVMetadata_Result:
AVMETADATA_SUCCESS: The function is executed successfully.
AVMETADATA_ERROR_INVALID_PARAM: 1. builder is a null pointer.
- composer is a null pointer.
OH_AVMetadataBuilder_SetDescription()
AVMetadata_Result OH_AVMetadataBuilder_SetDescription(OH_AVMetadataBuilder* builder, const char* description)
Description
Sets a description for the media asset.
Since: 13
Parameters
| Name | Description |
|---|---|
| builder | Pointer to an OH_AVMetadataBuilder instance. |
| description | Pointer to the description. |
Returns
Returns one of the following result codes defined in AVMetadata_Result:
AVMETADATA_SUCCESS: The function is executed successfully.
AVMETADATA_ERROR_INVALID_PARAM:
builder is a null pointer.
description is a null pointer.
OH_AVMetadataBuilder_SetDisplayTags()
AVMetadata_Result OH_AVMetadataBuilder_SetDisplayTags(OH_AVMetadataBuilder* builder, int32_t tags)
Description
Sets display tags for the media asset.
Since: 13
Parameters
| Name | Description |
|---|---|
| builder | Pointer to an OH_AVMetadataBuilder instance. |
| tags | Tags of the media asset displayed on the playback control page. |
Returns
Returns one of the following result codes defined in AVMetadata_Result:
AVMETADATA_SUCCESS: The function is executed successfully.
AVMETADATA_ERROR_INVALID_PARAM: builder is a null pointer.
OH_AVMetadataBuilder_SetDuration()
AVMetadata_Result OH_AVMetadataBuilder_SetDuration(OH_AVMetadataBuilder* builder, int64_t duration)
Description
Sets the playback duration for the media asset.
Since: 13
Parameters
| Name | Description |
|---|---|
| builder | Pointer to an OH_AVMetadataBuilder instance. |
| duration | Playback duration, in ms. |
Returns
Returns one of the following result codes defined in AVMetadata_Result:
AVMETADATA_SUCCESS: The function is executed successfully.
AVMETADATA_ERROR_INVALID_PARAM: builder is a null pointer.
OH_AVMetadataBuilder_SetLyric()
AVMetadata_Result OH_AVMetadataBuilder_SetLyric(OH_AVMetadataBuilder* builder, const char* lyric)
Description
Sets lyrics for the media asset.
Since: 13
Parameters
| Name | Description |
|---|---|
| builder | Pointer to an OH_AVMetadataBuilder instance. |
| lyric | Pointer to the lyrics in the lrc format. |
Returns
Returns one of the following result codes defined in AVMetadata_Result:
AVMETADATA_SUCCESS: The function is executed successfully.
AVMETADATA_ERROR_INVALID_PARAM:
builder is a null pointer.
lyric is a null pointer.
OH_AVMetadataBuilder_SetMediaImageUri()
AVMetadata_Result OH_AVMetadataBuilder_SetMediaImageUri(OH_AVMetadataBuilder* builder, const char* mediaImageUri)
Description
Sets an image for the media asset.
Since: 13
Parameters
| Name | Description |
|---|---|
| builder | Pointer to an OH_AVMetadataBuilder instance. |
| mediaImageUri | Pointer to the URI of the image. |
Returns
Returns one of the following result codes defined in AVMetadata_Result:
AVMETADATA_SUCCESS: The function is executed successfully.
AVMETADATA_ERROR_INVALID_PARAM:
builder is a null pointer.
mediaImageUri is a null pointer.
OH_AVMetadataBuilder_SetSkipIntervals()
AVMetadata_Result OH_AVMetadataBuilder_SetSkipIntervals(OH_AVMetadataBuilder* builder, AVMetadata_SkipIntervals intervals)
Description
Sets the skip intervals for the media asset.
Since: 13
Parameters
| Name | Description |
|---|---|
| builder | Pointer to an OH_AVMetadataBuilder instance. |
| intervals | Skip intervals. |
Returns
Returns one of the following result codes defined in AVMetadata_Result:
AVMETADATA_SUCCESS: The function is executed successfully.
AVMETADATA_ERROR_INVALID_PARAM:
builder is a null pointer.
intervals is invalid.
OH_AVMetadataBuilder_SetSubtitle()
AVMetadata_Result OH_AVMetadataBuilder_SetSubtitle(OH_AVMetadataBuilder* builder, const char* subtitle)
Description
Sets a subtitle for the media asset.
Since: 13
Parameters
| Name | Description |
|---|---|
| builder | Pointer to an OH_AVMetadataBuilder instance. |
| subtitle | Pointer to the subtitle. |
Returns
Returns one of the following result codes defined in AVMetadata_Result:
AVMETADATA_SUCCESS: The function is executed successfully.
AVMETADATA_ERROR_INVALID_PARAM:
builder is a null pointer.
subtitle is a null pointer.
OH_AVMetadataBuilder_SetTitle()
AVMetadata_Result OH_AVMetadataBuilder_SetTitle(OH_AVMetadataBuilder* builder, const char* title)
Description
Sets a title for the media asset.
Since: 13
Parameters
| Name | Description |
|---|---|
| builder | Pointer to an OH_AVMetadataBuilder instance. |
| title | Pointer to the title. |
Returns
Returns one of the following result codes defined in AVMetadata_Result:
AVMETADATA_SUCCESS: The function is executed successfully.
AVMETADATA_ERROR_INVALID_PARAM: 1. builder is a null pointer.
- title is a null pointer.
OH_AVMetadataBuilder_SetWriter()
AVMetadata_Result OH_AVMetadataBuilder_SetWriter(OH_AVMetadataBuilder* builder, const char* writer)
Description
Sets a writer for the media asset.
Since: 13
Parameters
| Name | Description |
|---|---|
| builder | Pointer to an OH_AVMetadataBuilder instance. |
| writer | Pointer to the writer. |
Returns
Returns one of the following result codes defined in AVMetadata_Result:
AVMETADATA_SUCCESS: The function is executed successfully.
AVMETADATA_ERROR_INVALID_PARAM: 1. builder is a null pointer.
- writer is a null pointer.
OH_AVSession_Activate()
AVSession_ErrCode OH_AVSession_Activate(OH_AVSession* avsession)
Description
Activates a session.
Since: 13
Parameters
| Name | Description |
|---|---|
| avsession | Pointer to a session object. |
Returns
Returns one of the following result codes defined in AVSession_ErrCode:
AV_SESSION_ERR_SUCCESS: The function is executed successfully.
AV_SESSION_ERR_INVALID_PARAMETER: avsession is a null pointer.
AV_SESSION_ERR_SERVICE_EXCEPTION: The session service is abnormal.
OH_AVSession_Create()
AVSession_ErrCode OH_AVSession_Create(AVSession_Type sessionType, const char* sessionTag, const char* bundleName, const char* abilityName, OH_AVSession** avsession)
Description
Creates a session object.
Since: 13
Parameters
| Name | Description |
|---|---|
| sessionType | Session type. For details about the available options, see AVSession_Type. |
| sessionTag | Pointer to the session tag. |
| bundleName | Pointer to the bundle name. |
| abilityName | Pointer to the ability name. |
| avsession | Double pointer to the session object created. |
Returns
Returns one of the following result codes defined in AVSession_ErrCode:
AV_SESSION_ERR_SUCCESS: The function is executed successfully.
link AV_SESSION_ERR_SERVICE_EXCEPTION: The session service is abnormal or the session object already exists.
AV_SESSION_ERR_INVALID_PARAMETER:
sessionType is invalid.
sessionTag is a null pointer.
bundleName is a null pointer.
abilityName is a null pointer.
avsession is a null pointer.
OH_AVSession_Deactivate()
AVSession_ErrCode OH_AVSession_Deactivate(OH_AVSession* avsession)
Description
Deactivates a session.
Since: 13
Parameters
| Name | Description |
|---|---|
| avsession | Pointer to a session object. |
Returns
Returns one of the following result codes defined in AVSession_ErrCode:
AV_SESSION_ERR_SUCCESS: The function is executed successfully.
AV_SESSION_ERR_INVALID_PARAMETER: avsession is a null pointer.
AV_SESSION_ERR_SERVICE_EXCEPTION: The session service is abnormal.
OH_AVSession_Destroy()
AVSession_ErrCode OH_AVSession_Destroy(OH_AVSession* avsession)
Description
Destroys a session object.
Since: 13
Parameters
| Name | Description |
|---|---|
| avsession | Pointer to a session object. |
Returns
Returns one of the following result codes defined in AVSession_ErrCode:
AV_SESSION_ERR_SUCCESS: The function is executed successfully.
AV_SESSION_ERR_INVALID_PARAMETER: avsession is a null pointer.
OH_AVSession_GetSessionId()
AVSession_ErrCode OH_AVSession_GetSessionId(OH_AVSession* avsession, const char** sessionId)
Description
Obtains the session ID.
Since: 13
Parameters
| Name | Description |
|---|---|
| avsession | Pointer to a session object. |
| sessionId | Double pointer to the session ID obtained. |
Returns
Returns one of the following result codes defined in AVSession_ErrCode:
AV_SESSION_ERR_SUCCESS: The function is executed successfully.
AV_SESSION_ERR_SERVICE_EXCEPTION: The session service is abnormal or an error occurs.
AV_SESSION_ERR_INVALID_PARAMETER:
avsession is a null pointer.
sessionId is a null pointer.
OH_AVSession_GetSessionType()
AVSession_ErrCode OH_AVSession_GetSessionType(OH_AVSession* avsession, AVSession_Type* sessionType)
Description
Obtains the session type.
Since: 13
Parameters
| Name | Description |
|---|---|
| avsession | Pointer to a session object. |
| sessionType | Pointer to the session type obtained. |
Returns
Returns one of the following result codes defined in AVSession_ErrCode:
AV_SESSION_ERR_SUCCESS: The function is executed successfully.
AV_SESSION_ERR_SERVICE_EXCEPTION: The session service is abnormal or an error occurs.
AV_SESSION_ERR_INVALID_PARAMETER:
avsession is a null pointer.
sessionType is a null pointer.
OH_AVSession_RegisterCommandCallback()
AVSession_ErrCode OH_AVSession_RegisterCommandCallback(OH_AVSession* avsession, AVSession_ControlCommand command, OH_AVSessionCallback_OnCommand callback, void* userData)
Description
Registers a callback for a common playback control command.
Since: 13
Parameters
| Name | Description |
|---|---|
| avsession | Pointer to a session object. |
| command | Playback control command. |
| callback | Callback to register, which is OH_AVSessionCallback_OnCommand. |
| userData | Pointer to the application data passed through the callback functions. |
Returns
Returns one of the following result codes defined in AVSession_ErrCode:
AV_SESSION_ERR_SUCCESS: The function is executed successfully.
AV_SESSION_ERR_CODE_COMMAND_INVALID: The playback control command is invalid.
AV_SESSION_ERR_SERVICE_EXCEPTION: The session service is abnormal.
AV_SESSION_ERR_INVALID_PARAMETER:
avsession is a null pointer.
callback is a null pointer.
OH_AVSession_RegisterForwardCallback()
AVSession_ErrCode OH_AVSession_RegisterForwardCallback(OH_AVSession* avsession, OH_AVSessionCallback_OnFastForward callback, void* userData)
Description
Registers a callback for the fast-forward operation.
Since: 13
Parameters
| Name | Description |
|---|---|
| avsession | Pointer to a session object. |
| callback | Callback to register, which issue OH_AVSessionCallback_OnFastForward. |
| userData | Pointer to the application data passed through the callback functions. |
Returns
Returns one of the following result codes defined in AVSession_ErrCode:
AV_SESSION_ERR_SUCCESS: The function is executed successfully.
AV_SESSION_ERR_SERVICE_EXCEPTION: The session service is abnormal.
AV_SESSION_ERR_INVALID_PARAMETER:
avsession is a null pointer.
callback is a null pointer.
OH_AVSession_RegisterRewindCallback()
AVSession_ErrCode OH_AVSession_RegisterRewindCallback(OH_AVSession* avsession, OH_AVSessionCallback_OnRewind callback, void* userData)
Description
Registers a callback for the rewind operation.
Since: 13
Parameters
| Name | Description |
|---|---|
| avsession | Pointer to a session object. |
| callback | Callback to register, which is OH_AVSessionCallback_OnRewind. |
| userData | Pointer to the application data passed through the callback functions. |
Returns
Returns one of the following result codes defined in AVSession_ErrCode:
AV_SESSION_ERR_SUCCESS: The function is executed successfully.
AV_SESSION_ERR_SERVICE_EXCEPTION: The session service is abnormal.
AV_SESSION_ERR_INVALID_PARAMETER:
avsession is a null pointer.
callback is a null pointer.
OH_AVSession_RegisterSeekCallback()
AVSession_ErrCode OH_AVSession_RegisterSeekCallback(OH_AVSession* avsession, OH_AVSessionCallback_OnSeek callback, void* userData)
Description
Registers a callback for the seek operation.
Since: 13
Parameters
| Name | Description |
|---|---|
| avsession | Pointer to a session object. |
| callback | Callback to register, which is OH_AVSessionCallback_OnSeek. |
| userData | Pointer to the application data passed through the callback functions. |
Returns
Returns one of the following result codes defined in AVSession_ErrCode:
AV_SESSION_ERR_SUCCESS: The function is executed successfully.
AV_SESSION_ERR_SERVICE_EXCEPTION: The session service is abnormal.
AV_SESSION_ERR_INVALID_PARAMETER:
avsession is a null pointer.
callback is a null pointer.
OH_AVSession_RegisterSetLoopModeCallback()
AVSession_ErrCode OH_AVSession_RegisterSetLoopModeCallback(OH_AVSession* avsession, OH_AVSessionCallback_OnSetLoopMode callback, void* userData)
Description
Registers a callback for the operation of setting the loop mode.
Since: 13
Parameters
| Name | Description |
|---|---|
| avsession | Pointer to a session object. |
| callback | Callback to register, which is OH_AVSessionCallback_OnSetLoopMode. |
| userData | Pointer to the application data passed through the callback functions. |
Returns
Returns one of the following result codes defined in AVSession_ErrCode:
AV_SESSION_ERR_SUCCESS: The function is executed successfully.
AV_SESSION_ERR_SERVICE_EXCEPTION: The session service is abnormal.
AV_SESSION_ERR_INVALID_PARAMETER:
avsession is a null pointer.
callback is a null pointer.
OH_AVSession_RegisterToggleFavoriteCallback()
AVSession_ErrCode OH_AVSession_RegisterToggleFavoriteCallback(OH_AVSession* avsession, OH_AVSessionCallback_OnToggleFavorite callback, void* userData)
Description
Registers a callback for the operation of favoriting a media asset.
Since: 13
Parameters
| Name | Description |
|---|---|
| avsession | Pointer to a session object. |
| callback | Callback to register, which is OH_AVSessionCallback_OnToggleFavorite. |
| userData | Pointer to the application data passed through the callback functions. |
Returns
Returns one of the following result codes defined in AVSession_ErrCode:
AV_SESSION_ERR_SUCCESS: The function is executed successfully.
AV_SESSION_ERR_SERVICE_EXCEPTION: The session service is abnormal.
AV_SESSION_ERR_INVALID_PARAMETER:
avsession is a null pointer.
callback is a null pointer.
OH_AVSession_SetAVMetadata()
AVSession_ErrCode OH_AVSession_SetAVMetadata(OH_AVSession* avsession, OH_AVMetadata* avmetadata)
Description
Sets media metadata.
Since: 13
Parameters
| Name | Description |
|---|---|
| avsession | Pointer to a session object. |
| avmetadata | Pointer to the media metadata. |
Returns
Returns one of the following result codes defined in AVSession_ErrCode:
AV_SESSION_ERR_SUCCESS: The function is executed successfully.
AV_SESSION_ERR_SERVICE_EXCEPTION: The session service is abnormal.
AV_SESSION_ERR_INVALID_PARAMETER:
avsession is a null pointer.
avmetadata is a null pointer.
OH_AVSession_SetFavorite()
AVSession_ErrCode OH_AVSession_SetFavorite(OH_AVSession* avsession, bool favorite)
Description
Favorites or unfavorites the media asset.
Since: 13
Parameters
| Name | Description |
|---|---|
| avsession | Pointer to a session object. |
| favorite | Whether to favorite or unfavorite the media asset. The value true means to favorite the media asset, and false means the opposite. |
Returns
Returns one of the following result codes defined in AVSession_ErrCode:
AV_SESSION_ERR_SUCCESS: The function is executed successfully.
AV_SESSION_ERR_SERVICE_EXCEPTION: The session service is abnormal.
AV_SESSION_ERR_INVALID_PARAMETER: avsession is a null pointer.
OH_AVSession_SetLoopMode()
AVSession_ErrCode OH_AVSession_SetLoopMode(OH_AVSession* avsession, AVSession_LoopMode loopMode)
Description
Sets a loop mode.
Since: 13
Parameters
| Name | Description |
|---|---|
| avsession | Pointer to a session object. |
| loopMode | Loop mode. |
Returns
Returns one of the following result codes defined in AVSession_ErrCode:
AV_SESSION_ERR_SUCCESS: The function is executed successfully.
AV_SESSION_ERR_SERVICE_EXCEPTION: The session service is abnormal.
AV_SESSION_ERR_INVALID_PARAMETER:
avsession is a null pointer.
loopMode is invalid.
OH_AVSession_SetPlaybackPosition()
AVSession_ErrCode OH_AVSession_SetPlaybackPosition(OH_AVSession* avsession, AVSession_PlaybackPosition* playbackPosition)
Description
Sets the playback position.
Since: 13
Parameters
| Name | Description |
|---|---|
| avsession | Pointer to a session object. |
| playbackPosition | Pointer to the playback position. |
Returns
Returns one of the following result codes defined in AVSession_ErrCode:
AV_SESSION_ERR_SUCCESS: The function is executed successfully.
AV_SESSION_ERR_SERVICE_EXCEPTION: The session service is abnormal.
AV_SESSION_ERR_INVALID_PARAMETER:
avsession is a null pointer.
playbackPosition is a null pointer.
OH_AVSession_SetPlaybackState()
AVSession_ErrCode OH_AVSession_SetPlaybackState(OH_AVSession* avsession, AVSession_PlaybackState playbackState)
Description
Sets the playback state.
Since: 13
Parameters
| Name | Description |
|---|---|
| avsession | Pointer to a session object. |
| playbackState | Playback state. |
Returns
Returns one of the following result codes defined in AVSession_ErrCode:
AV_SESSION_ERR_SUCCESS: The function is executed successfully.
AV_SESSION_ERR_SERVICE_EXCEPTION: The session service is abnormal.
AV_SESSION_ERR_INVALID_PARAMETER:
avsession is a null pointer.
playbackState is invalid.
OH_AVSession_UnregisterCommandCallback()
AVSession_ErrCode OH_AVSession_UnregisterCommandCallback(OH_AVSession* avsession, AVSession_ControlCommand command, OH_AVSessionCallback_OnCommand callback)
Description
Unregisters the callback for a common playback control command.
Since: 13
Parameters
| Name | Description |
|---|---|
| avsession | Pointer to a session object. |
| command | Playback control command. |
| callback | Callback to unregister, which is OH_AVSessionCallback_OnCommand. |
Returns
Returns one of the following result codes defined in AVSession_ErrCode:
AV_SESSION_ERR_SUCCESS: The function is executed successfully.
AV_SESSION_ERR_CODE_COMMAND_INVALID: The playback control command is invalid.
AV_SESSION_ERR_SERVICE_EXCEPTION: The session service is abnormal.
AV_SESSION_ERR_INVALID_PARAMETER:
avsession is a null pointer.
callback is a null pointer.
OH_AVSession_UnregisterForwardCallback()
AVSession_ErrCode OH_AVSession_UnregisterForwardCallback(OH_AVSession* avsession, OH_AVSessionCallback_OnFastForward callback)
Description
Unregisters the callback for the fast-forward operation.
Since: 13
Parameters
| Name | Description |
|---|---|
| avsession | Pointer to a session object. |
| callback | Callback to unregister, which issue OH_AVSessionCallback_OnFastForward. |
Returns
Returns one of the following result codes defined in AVSession_ErrCode:
AV_SESSION_ERR_SUCCESS: The function is executed successfully.
AV_SESSION_ERR_SERVICE_EXCEPTION: The session service is abnormal.
AV_SESSION_ERR_INVALID_PARAMETER:
avsession is a null pointer.
callback is a null pointer.
OH_AVSession_UnregisterRewindCallback()
AVSession_ErrCode OH_AVSession_UnregisterRewindCallback(OH_AVSession* avsession, OH_AVSessionCallback_OnRewind callback)
Description
Unregisters the callback for the rewind operation.
Since: 13
Parameters
| Name | Description |
|---|---|
| avsession | Pointer to a session object. |
| callback | Callback to unregister, which is OH_AVSessionCallback_OnRewind. |
Returns
Returns one of the following result codes defined in AVSession_ErrCode:
AV_SESSION_ERR_SUCCESS: The function is executed successfully.
AV_SESSION_ERR_SERVICE_EXCEPTION: The session service is abnormal.
AV_SESSION_ERR_INVALID_PARAMETER:
avsession is a null pointer.
callback is a null pointer.
OH_AVSession_UnregisterSeekCallback()
AVSession_ErrCode OH_AVSession_UnregisterSeekCallback(OH_AVSession* avsession, OH_AVSessionCallback_OnSeek callback)
Description
Unregisters the callback for the seek operation.
Since: 13
Parameters
| Name | Description |
|---|---|
| avsession | Pointer to a session object. |
| callback | Callback to unregister, which is OH_AVSessionCallback_OnSeek. |
Returns
Returns one of the following result codes defined in AVSession_ErrCode:
AV_SESSION_ERR_SUCCESS: The function is executed successfully.
AV_SESSION_ERR_SERVICE_EXCEPTION: The session service is abnormal.
AV_SESSION_ERR_INVALID_PARAMETER:
avsession is a null pointer.
callback is a null pointer.
OH_AVSession_UnregisterSetLoopModeCallback()
AVSession_ErrCode OH_AVSession_UnregisterSetLoopModeCallback(OH_AVSession* avsession, OH_AVSessionCallback_OnSetLoopMode callback)
Description
Unregisters the callback for the operation of setting the loop mode.
Since: 13
Parameters
| Name | Description |
|---|---|
| avsession | Pointer to a session object. |
| callback | Callback to unregister, which is OH_AVSessionCallback_OnSetLoopMode. |
Returns
Returns one of the following result codes defined in AVSession_ErrCode:
AV_SESSION_ERR_SUCCESS: The function is executed successfully.
AV_SESSION_ERR_SERVICE_EXCEPTION: The session service is abnormal.
AV_SESSION_ERR_INVALID_PARAMETER:
avsession is a null pointer.
callback is a null pointer.
OH_AVSession_UnregisterToggleFavoriteCallback()
AVSession_ErrCode OH_AVSession_UnregisterToggleFavoriteCallback(OH_AVSession* avsession, OH_AVSessionCallback_OnToggleFavorite callback)
Description
Unregisters the callback for the operation of favoriting a media asset.
Since: 13
Parameters
| Name | Description |
|---|---|
| avsession | Pointer to a session object. |
| callback | Callback to unregister, which is OH_AVSessionCallback_OnToggleFavorite. |
Returns
Returns one of the following result codes defined in AVSession_ErrCode:
AV_SESSION_ERR_SUCCESS: The function is executed successfully.
AV_SESSION_ERR_SERVICE_EXCEPTION: The session service is abnormal.
AV_SESSION_ERR_INVALID_PARAMETER:
avsession is a null pointer.
callback is a null pointer.
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