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176 lines
9.3 KiB
C
176 lines
9.3 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 __MFXBRC_H__
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#define __MFXBRC_H__
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#include "mfxstructures.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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/*! See the mfxExtBRC structure for details. */
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enum {
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MFX_EXTBUFF_BRC = MFX_MAKEFOURCC('E','B','R','C')
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};
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MFX_PACK_BEGIN_STRUCT_W_PTR()
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/*!
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Describes frame parameters required for external BRC functions.
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*/
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typedef struct {
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mfxU32 reserved[23];
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mfxU16 SceneChange; /*!< Frame belongs to a new scene if non zero. */
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mfxU16 LongTerm; /*!< Frame is a Long Term Reference frame if non zero. */
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mfxU32 FrameCmplx; /*!< Frame Complexity Frame spatial complexity if non zero. Zero if complexity is not available. */
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mfxU32 EncodedOrder; /*!< The frame number in a sequence of reordered frames starting from encoder Init. */
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mfxU32 DisplayOrder; /*!< The frame number in a sequence of frames in display order starting from last IDR. */
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mfxU32 CodedFrameSize; /*!< Size of the frame in bytes after encoding. */
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mfxU16 FrameType; /*!< Frame type. See FrameType enumerator for possible values. */
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mfxU16 PyramidLayer; /*!< B-pyramid or P-pyramid layer that the frame belongs to. */
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mfxU16 NumRecode; /*!< Number of recodings performed for this frame. */
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mfxU16 NumExtParam; /*!< Reserved for future use. */
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mfxExtBuffer** ExtParam;/*!< Reserved for future use. */
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} mfxBRCFrameParam;
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MFX_PACK_END()
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MFX_PACK_BEGIN_STRUCT_W_PTR()
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/*!
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Specifies controls for next frame encoding provided by external BRC functions.
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*/
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typedef struct {
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mfxI32 QpY; /*!< Frame-level Luma QP. */
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mfxU32 InitialCpbRemovalDelay; /*!< See initial_cpb_removal_delay in codec standard. Ignored if no HRD control:
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mfxExtCodingOption::VuiNalHrdParameters = MFX_CODINGOPTION_OFF. Calculated by encoder if
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initial_cpb_removal_delay==0 && initial_cpb_removal_offset == 0 && HRD control is switched on. */
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mfxU32 InitialCpbRemovalOffset; /*!< See initial_cpb_removal_offset in codec standard. Ignored if no HRD control:
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mfxExtCodingOption::VuiNalHrdParameters = MFX_CODINGOPTION_OFF. Calculated by encoder if
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initial_cpb_removal_delay==0 && initial_cpb_removal_offset == 0 && HRD control is switched on. */
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mfxU32 reserved1[7];
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mfxU32 MaxFrameSize; /*!< Max frame size in bytes. Option for repack feature. Driver calls PAK until current frame size is
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less than or equal to maxFrameSize, or number of repacking for this frame is equal to maxNumRePak. Repack is available
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if there is driver support, MaxFrameSize !=0, and MaxNumRePak != 0. Ignored if maxNumRePak == 0. */
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mfxU8 DeltaQP[8]; /*!< Option for repack feature. Ignored if maxNumRePak == 0 or maxNumRePak==0. If current
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frame size > maxFrameSize and/or number of repacking (nRepack) for this frame <= maxNumRePak,
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PAK is called with QP = mfxBRCFrameCtrl::QpY + Sum(DeltaQP[i]), where i = [0,nRepack].
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Non zero DeltaQP[nRepack] are ignored if nRepack > maxNumRePak.
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If repacking feature is on ( maxFrameSize & maxNumRePak are not zero), it is calculated by the encoder. */
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mfxU16 MaxNumRepak; /*!< Number of possible repacks in driver if current frame size > maxFrameSize. Ignored if maxFrameSize==0.
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See maxFrameSize description. Possible values are in the range of 0 to 8. */
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mfxU16 NumExtParam; /*!< Reserved for future use. */
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mfxExtBuffer** ExtParam; /*!< Reserved for future use. */
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} mfxBRCFrameCtrl;
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MFX_PACK_END()
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/*! The BRCStatus enumerator itemizes instructions to the encoder by mfxExtBrc::Update. */
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enum {
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MFX_BRC_OK = 0, /*!< CodedFrameSize is acceptable, no further recoding/padding/skip required, proceed to next frame. */
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MFX_BRC_BIG_FRAME = 1, /*!< Coded frame is too big, recoding required. */
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MFX_BRC_SMALL_FRAME = 2, /*!< Coded frame is too small, recoding required. */
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MFX_BRC_PANIC_BIG_FRAME = 3, /*!< Coded frame is too big, no further recoding possible - skip frame. */
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MFX_BRC_PANIC_SMALL_FRAME = 4 /*!< Coded frame is too small, no further recoding possible - required padding to mfxBRCFrameStatus::MinFrameSize. */
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};
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MFX_PACK_BEGIN_STRUCT_W_PTR()
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/*!
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Specifies instructions for the encoder provided by external BRC after each frame encoding. See the BRCStatus enumerator for details.
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*/
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typedef struct {
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mfxU32 MinFrameSize; /*!< Size in bytes, coded frame must be padded to when Status = MFX_BRC_PANIC_SMALL_FRAME. */
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mfxU16 BRCStatus; /*!< BRC status. See the BRCStatus enumerator for possible values. */
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mfxU16 reserved[25];
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mfxHDL reserved1;
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} mfxBRCFrameStatus;
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MFX_PACK_END()
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MFX_PACK_BEGIN_STRUCT_W_PTR()
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/*!
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Contains a set of callbacks to perform external bitrate control. Can be attached to the mfxVideoParam structure during
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encoder initialization. Set the mfxExtCodingOption2::ExtBRC option to ON to make the encoder use the external BRC instead of the native one.
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*/
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typedef struct {
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mfxExtBuffer Header; /*!< Extension buffer header. Header.BufferId must be equal to MFX_EXTBUFF_BRC. */
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mfxU32 reserved[14];
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mfxHDL pthis; /*!< Pointer to the BRC object. */
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/*!
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@brief Initializes the BRC session according to parameters from input mfxVideoParam and attached structures. It does not modify the input mfxVideoParam and attached structures. Invoked during MFXVideoENCODE_Init.
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@param[in] pthis Pointer to the BRC object.
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@param[in] par Pointer to the mfxVideoParam structure that was used for the encoder initialization.
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@return
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MFX_ERR_NONE The function completed successfully. \n
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MFX_ERR_UNSUPPORTED The function detected unsupported video parameters.
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*/
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mfxStatus (MFX_CDECL *Init) (mfxHDL pthis, mfxVideoParam* par);
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/*!
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@brief Resets BRC session according to new parameters. It does not modify the input mfxVideoParam and attached structures. Invoked during MFXVideoENCODE_Reset.
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@param[in] pthis Pointer to the BRC object.
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@param[in] par Pointer to the mfxVideoParam structure that was used for the encoder initialization.
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@return
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MFX_ERR_NONE The function completed successfully. \n
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MFX_ERR_UNSUPPORTED The function detected unsupported video parameters. \n
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MFX_ERR_INCOMPATIBLE_VIDEO_PARAM The function detected that the video parameters provided by the application are incompatible with
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initialization parameters. Reset requires additional memory allocation and cannot be executed.
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*/
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mfxStatus (MFX_CDECL *Reset) (mfxHDL pthis, mfxVideoParam* par);
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/*!
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@brief Deallocates any internal resources acquired in Init for this BRC session. Invoked during MFXVideoENCODE_Close.
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@param[in] pthis Pointer to the BRC object.
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@return
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MFX_ERR_NONE The function completed successfully.
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*/
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mfxStatus (MFX_CDECL *Close) (mfxHDL pthis);
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/*! @brief Returns controls (@p ctrl) to encode next frame based on info from input mfxBRCFrameParam structure (@p par) and
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internal BRC state. Invoked asynchronously before each frame encoding or recoding.
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@param[in] pthis Pointer to the BRC object.
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@param[in] par Pointer to the mfxVideoParam structure that was used for the encoder initialization.
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@param[out] ctrl Pointer to the output mfxBRCFrameCtrl structure.
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@return
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MFX_ERR_NONE The function completed successfully.
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*/
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mfxStatus (MFX_CDECL* GetFrameCtrl) (mfxHDL pthis, mfxBRCFrameParam* par, mfxBRCFrameCtrl* ctrl);
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/*!
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@brief Updates internal BRC state and returns status to instruct encoder whether it should recode the previous frame,
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skip the previous frame, do padding, or proceed to next frame based on info from input mfxBRCFrameParam and mfxBRCFrameCtrl structures.
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Invoked asynchronously after each frame encoding or recoding.
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@param[in] pthis Pointer to the BRC object.
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@param[in] par Pointer to the mfxVideoParam structure that was used for the encoder initialization.
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@param[in] ctrl Pointer to the output mfxBRCFrameCtrl structure.
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@param[in] status Pointer to the output mfxBRCFrameStatus structure.
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@return
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MFX_ERR_NONE The function completed successfully.
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*/
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mfxStatus (MFX_CDECL* Update) (mfxHDL pthis, mfxBRCFrameParam* par, mfxBRCFrameCtrl* ctrl, mfxBRCFrameStatus* status);
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mfxHDL reserved1[10];
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} mfxExtBRC;
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MFX_PACK_END()
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#ifdef __cplusplus
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} // extern "C"
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#endif /* __cplusplus */
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#endif
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