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235 lines
10 KiB
C
235 lines
10 KiB
C
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/*############################################################################
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# Copyright Intel Corporation
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#
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# SPDX-License-Identifier: MIT
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############################################################################*/
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#ifndef __MFXSESSION_H__
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#define __MFXSESSION_H__
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#include "mfxcommon.h"
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#ifdef __cplusplus
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extern "C"
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{
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#endif /* __cplusplus */
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/* Global Functions */
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/*! Session handle. */
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typedef struct _mfxSession *mfxSession;
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/*!
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@brief
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Creates and initializes a session in the legacy mode for compatibility with Intel(r) Media SDK applications.
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This function is deprecated starting from API version 2.0, applications must use MFXLoad with mfxCreateSession
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to select the implementation and initialize the session.
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Call this function before calling
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any other API function. If the desired implementation specified by ``impl`` is MFX_IMPL_AUTO,
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the function will search for the platform-specific implementation.
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If the function cannot find the platform-specific implementation, it will use the software implementation instead.
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The ``ver`` argument indicates the desired version of the library implementation.
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The loaded implementation will have an API version compatible to the specified version (equal in
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the major version number, and no less in the minor version number.) If the desired version
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is not specified, the default is to use the API version from the library release with
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which an application is built.
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Production applications should always specify the minimum API version that meets the
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functional requirements. For example, if an application uses only H.264 decoding as described
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in API v1.0, the application should initialize the library with API v1.0. This ensures
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backward compatibility.
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@param[in] impl mfxIMPL enumerator that indicates the desired legacy Intel(r) Media SDK implementation.
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@param[in] ver Pointer to the minimum library version or zero, if not specified.
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@param[out] session Pointer to the legacy Intel(r) Media SDK session handle.
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@return
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MFX_ERR_NONE The function completed successfully. The output parameter contains the handle of the session.\n
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MFX_ERR_UNSUPPORTED The function cannot find the desired legacy Intel(r) Media SDK implementation or version.
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@since This function is available since API version 1.0.
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@deprecated Deprecated in API version 2.3. Use MFXLoad and MFXCreateSession to initialize the session.
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Use MFX_DEPRECATED_OFF macro to turn off the deprecation message visualization.
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*/
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MFX_DEPRECATED mfxStatus MFX_CDECL MFXInit(mfxIMPL impl, mfxVersion *ver, mfxSession *session);
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/*!
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@brief
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Creates and initializes a session in the legacy mode for compatibility with Intel(r) Media SDK applications.
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This function is deprecated starting from API version 2.0, applications must use MFXLoad with mfxCreateSession
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to select the implementation and initialize the session.
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Call this function before calling any other API functions.
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If the desired implementation specified by ``par`` is MFX_IMPL_AUTO, the function will search for
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the platform-specific implementation. If the function cannot find the platform-specific implementation, it will use the software implementation instead.
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The argument ``par.Version`` indicates the desired version of the implementation. The loaded implementation will have an API
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version compatible to the specified version (equal in the major version number, and no less in the minor version number.)
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If the desired version is not specified, the default is to use the API version from the library release with
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which an application is built.
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Production applications should always specify the minimum API version that meets the functional requirements.
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For example, if an application uses only H.264 decoding as described in API v1.0, the application should initialize the library with API v1.0. This ensures backward compatibility.
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The argument ``par.ExternalThreads`` specifies threading mode. Value 0 means that the implementation should create and
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handle work threads internally (this is essentially the equivalent of the regular MFXInit).
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@param[in] par mfxInitParam structure that indicates the desired implementation, minimum library version and desired threading mode.
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@param[out] session Pointer to the session handle.
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@return
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MFX_ERR_NONE The function completed successfully. The output parameter contains the handle of the session.\n
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MFX_ERR_UNSUPPORTED The function cannot find the desired implementation or version.
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@since This function is available since API version 1.14.
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@deprecated Deprecated in API version 2.3. Use MFXLoad and MFXCreateSession to initialize the session.
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Use MFX_DEPRECATED_OFF macro to turn off the deprecation message visualization.
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*/
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MFX_DEPRECATED mfxStatus MFX_CDECL MFXInitEx(mfxInitParam par, mfxSession *session);
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/*!
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@brief
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Creates and initializes a session starting from API version 2.0. This function is used by the dispatcher.
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The dispatcher creates and fills the mfxInitializationParam structure according to mfxConfig values set by an application.
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Calling this function directly is not recommended. Instead, applications must call the mfxCreateSession function.
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@param[in] par mfxInitializationParam structure that indicates the minimum library version and acceleration type.
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@param[out] session Pointer to the session handle.
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@return
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MFX_ERR_NONE The function completed successfully. The output parameter contains the handle of the session.\n
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MFX_ERR_UNSUPPORTED The function cannot find the desired implementation or version.
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@since This function is available since API version 2.0.
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*/
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mfxStatus MFX_CDECL MFXInitialize(mfxInitializationParam par, mfxSession *session);
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/*!
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@brief Completes and deinitializes a session. Any active tasks in execution or
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in queue are aborted. The application cannot call any API function after calling this function.
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All child sessions must be disjoined before closing a parent session.
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@param[in] session session handle.
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@return MFX_ERR_NONE The function completed successfully.
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@since This function is available since API version 1.0.
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*/
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mfxStatus MFX_CDECL MFXClose(mfxSession session);
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/*!
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@brief Returns the implementation type of a given session.
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@param[in] session Session handle.
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@param[out] impl Pointer to the implementation type
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@return MFX_ERR_NONE The function completed successfully.
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@since This function is available since API version 1.0.
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*/
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mfxStatus MFX_CDECL MFXQueryIMPL(mfxSession session, mfxIMPL *impl);
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/*!
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@brief Returns the implementation version.
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@param[in] session Session handle.
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@param[out] version Pointer to the returned implementation version.
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@return MFX_ERR_NONE The function completed successfully.
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@since This function is available since API version 1.0.
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*/
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mfxStatus MFX_CDECL MFXQueryVersion(mfxSession session, mfxVersion *version);
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/*!
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@brief Joins the child session to the current session.
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After joining, the two sessions share thread and resource scheduling for asynchronous
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operations. However, each session still maintains its own device manager and buffer/frame
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allocator. Therefore, the application must use a compatible device manager and buffer/frame
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allocator to share data between two joined sessions.
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The application can join multiple sessions by calling this function multiple times. When joining
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the first two sessions, the current session becomes the parent responsible for thread and
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resource scheduling of any later joined sessions.
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Joining of two parent sessions is not supported.
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@param[in,out] session The current session handle.
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@param[in] child The child session handle to be joined
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@return MFX_ERR_NONE The function completed successfully. \n
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MFX_WRN_IN_EXECUTION Active tasks are executing or in queue in one of the
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sessions. Call this function again after all tasks are completed. \n
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MFX_ERR_UNSUPPORTED The child session cannot be joined with the current session.
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@since This function is available since API version 1.1.
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*/
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mfxStatus MFX_CDECL MFXJoinSession(mfxSession session, mfxSession child);
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/*!
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@brief Removes the joined state of the current session.
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After disjoining, the current session becomes independent. The application must ensure there is no active task running in the session before calling this API function.
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@param[in,out] session The current session handle.
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@return MFX_ERR_NONE The function completed successfully. \n
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MFX_WRN_IN_EXECUTION Active tasks are executing or in queue in one of the
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sessions. Call this function again after all tasks are completed. \n
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MFX_ERR_UNDEFINED_BEHAVIOR The session is independent, or this session is the parent of all joined sessions.
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@since This function is available since API version 1.1.
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*/
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mfxStatus MFX_CDECL MFXDisjoinSession(mfxSession session);
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/*!
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@brief Creates a clean copy of the current session.
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The cloned session is an independent session and does not inherit any user-defined buffer, frame allocator, or device manager handles from the current session.
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This function is a light-weight equivalent of MFXJoinSession after MFXInit.
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@param[in] session The current session handle.
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@param[out] clone Pointer to the cloned session handle.
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@return MFX_ERR_NONE The function completed successfully.
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@since This function is available since API version 1.1.
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*/
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mfxStatus MFX_CDECL MFXCloneSession(mfxSession session, mfxSession *clone);
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/*!
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@brief Sets the current session priority.
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@param[in] session The current session handle.
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@param[in] priority Priority value.
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@return MFX_ERR_NONE The function completed successfully.
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@since This function is available since API version 1.1.
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*/
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mfxStatus MFX_CDECL MFXSetPriority(mfxSession session, mfxPriority priority);
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/*!
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@brief Returns the current session priority.
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@param[in] session The current session handle.
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@param[out] priority Pointer to the priority value.
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@return MFX_ERR_NONE The function completed successfully.
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@since This function is available since API version 1.1.
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*/
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mfxStatus MFX_CDECL MFXGetPriority(mfxSession session, mfxPriority *priority);
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif
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