android / platform / external / libavc / 7950bf47b6944546a0aff11a7184947de9591b51 / . / encoder / ih264e_intra_modes_eval.h

/****************************************************************************** | |

* | |

* Copyright (C) 2015 The Android Open Source Project | |

* | |

* 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. | |

* | |

***************************************************************************** | |

* Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore | |

*/ | |

/** | |

******************************************************************************* | |

* @file | |

* ih264e_intra_modes_eval.h | |

* | |

* @brief | |

* This file contains declarations of routines that perform rate distortion | |

* analysis on a macroblock if coded as intra. | |

* | |

* @author | |

* ittiam | |

* | |

* @remarks | |

* none | |

* | |

******************************************************************************* | |

*/ | |

#ifndef IH264E_INTRA_MODES_EVAL_H_ | |

#define IH264E_INTRA_MODES_EVAL_H_ | |

/*****************************************************************************/ | |

/* Extern Function Declarations */ | |

/*****************************************************************************/ | |

/** | |

****************************************************************************** | |

* | |

* @brief | |

* derivation process for macroblock availability | |

* | |

* @par Description | |

* Calculates the availability of the left, top, topright and topleft macroblocks. | |

* | |

* @param[in] ps_proc_ctxt | |

* pointer to proc context (handle) | |

* | |

* @remarks Based on section 6.4.5 in H264 spec | |

* | |

* @return none | |

* | |

****************************************************************************** | |

*/ | |

void ih264e_derive_nghbr_avbl_of_mbs | |

( | |

process_ctxt_t *ps_proc_ctxt | |

); | |

/** | |

****************************************************************************** | |

* | |

* @brief | |

* derivation process for subblock/partition availability | |

* | |

* @par Description | |

* Calculates the availability of the left, top, topright and topleft subblock | |

* or partitions. | |

* | |

* @param[in] ps_proc_ctxt | |

* pointer to macroblock context (handle) | |

* | |

* @param[in] i1_pel_pos_x | |

* column position of the pel wrt the current block | |

* | |

* @param[in] i1_pel_pos_y | |

* row position of the pel in wrt current block | |

* | |

* @remarks Assumptions: before calling this function it is assumed that | |

* the neighbor availability of the current macroblock is already derived. | |

* Based on table 6-3 of H264 specification | |

* | |

* @return availability status (yes or no) | |

* | |

****************************************************************************** | |

*/ | |

UWORD8 ih264e_derive_ngbr_avbl_of_mb_partitions | |

( | |

block_neighbors_t *s_ngbr_avbl, | |

WORD8 i1_pel_pos_x, | |

WORD8 i1_pel_pos_y | |

); | |

/** | |

****************************************************************************** | |

* | |

* @brief | |

* evaluate best intra 16x16 mode (rate distortion opt off) | |

* | |

* @par Description | |

* This function evaluates all the possible intra 16x16 modes and finds the mode | |

* that best represents the macro-block (least distortion) and occupies fewer | |

* bits in the bit-stream. | |

* | |

* @param[in] ps_proc_ctxt | |

* pointer to process context (handle) | |

* | |

* @remarks | |

* Ideally the cost of encoding a macroblock is calculated as | |

* (distortion + lambda*rate). Where distortion is SAD/SATD,... between the | |

* input block and the reconstructed block and rate is the number of bits taken | |

* to place the macroblock in the bit-stream. In this routine the rate does not | |

* exactly point to the total number of bits it takes, rather it points to header | |

* bits necessary for encoding the macroblock. Assuming the deltaQP, cbp bits | |

* and residual bits fall in to texture bits the number of bits taken to encoding | |

* mbtype is considered as rate, we compute cost. Further we will approximate | |

* the distortion as the deviation b/w input and the predicted block as opposed | |

* to input and reconstructed block. | |

* | |

* NOTE: As per the Document JVT-O079, for intra 16x16 macroblock, | |

* the SAD and cost are one and the same. | |

* | |

* @return none | |

* | |

****************************************************************************** | |

*/ | |

void ih264e_evaluate_intra16x16_modes_for_least_cost_rdoptoff | |

( | |

process_ctxt_t *ps_proc_ctxt | |

); | |

/** | |

****************************************************************************** | |

* | |

* @brief | |

* evaluate best intra 8x8 mode (rate distortion opt on) | |

* | |

* @par Description | |

* This function evaluates all the possible intra 8x8 modes and finds the mode | |

* that best represents the macro-block (least distortion) and occupies fewer | |

* bits in the bit-stream. | |

* | |

* @param[in] ps_proc_ctxt | |

* pointer to proc ctxt | |

* | |

* @remarks Ideally the cost of encoding a macroblock is calculated as | |

* (distortion + lambda*rate). Where distortion is SAD/SATD,... between the | |

* input block and the reconstructed block and rate is the number of bits taken | |

* to place the macroblock in the bit-stream. In this routine the rate does not | |

* exactly point to the total number of bits it takes, rather it points to header | |

* bits necessary for encoding the macroblock. Assuming the deltaQP, cbp bits | |

* and residual bits fall in to texture bits the number of bits taken to encoding | |

* mbtype is considered as rate, we compute cost. Further we will approximate | |

* the distortion as the deviation b/w input and the predicted block as opposed | |

* to input and reconstructed block. | |

* | |

* NOTE: TODO: This function needs to be tested | |

* | |

* @return none | |

* | |

****************************************************************************** | |

*/ | |

void ih264e_evaluate_intra8x8_modes_for_least_cost_rdoptoff | |

( | |

process_ctxt_t *ps_proc_ctxt | |

); | |

/** | |

****************************************************************************** | |

* | |

* @brief | |

* evaluate best intra 4x4 mode (rate distortion opt on) | |

* | |

* @par Description | |

* This function evaluates all the possible intra 4x4 modes and finds the mode | |

* that best represents the macro-block (least distortion) and occupies fewer | |

* bits in the bit-stream. | |

* | |

* @param[in] ps_proc_ctxt | |

* pointer to proc ctxt | |

* | |

* @remarks | |

* Ideally the cost of encoding a macroblock is calculated as | |

* (distortion + lambda*rate). Where distortion is SAD/SATD,... between the | |

* input block and the reconstructed block and rate is the number of bits taken | |

* to place the macroblock in the bit-stream. In this routine the rate does not | |

* exactly point to the total number of bits it takes, rather it points to header | |

* bits necessary for encoding the macroblock. Assuming the deltaQP, cbp bits | |

* and residual bits fall in to texture bits the number of bits taken to encoding | |

* mbtype is considered as rate, we compute cost. Further we will approximate | |

* the distortion as the deviation b/w input and the predicted block as opposed | |

* to input and reconstructed block. | |

* | |

* NOTE: As per the Document JVT-O079, for the whole intra 4x4 macroblock, | |

* 24*lambda is added to the SAD before comparison with the best SAD for | |

* inter prediction. This is an empirical value to prevent using too many intra | |

* blocks. | |

* | |

* @return none | |

* | |

****************************************************************************** | |

*/ | |

void ih264e_evaluate_intra4x4_modes_for_least_cost_rdopton | |

( | |

process_ctxt_t *ps_proc_ctxt | |

); | |

/** | |

****************************************************************************** | |

* | |

* @brief | |

* evaluate best intra 4x4 mode (rate distortion opt off) | |

* | |

* @par Description | |

* This function evaluates all the possible intra 4x4 modes and finds the mode | |

* that best represents the macro-block (least distortion) and occupies fewer | |

* bits in the bit-stream. | |

* | |

* @param[in] ps_proc_ctxt | |

* pointer to proc ctxt | |

* | |

* @remarks | |

* Ideally the cost of encoding a macroblock is calculated as | |

* (distortion + lambda*rate). Where distortion is SAD/SATD,... between the | |

* input block and the reconstructed block and rate is the number of bits taken | |

* to place the macroblock in the bit-stream. In this routine the rate does not | |

* exactly point to the total number of bits it takes, rather it points to header | |

* bits necessary for encoding the macroblock. Assuming the deltaQP, cbp bits | |

* and residual bits fall in to texture bits the number of bits taken to encoding | |

* mbtype is considered as rate, we compute cost. Further we will approximate | |

* the distortion as the deviation b/w input and the predicted block as opposed | |

* to input and reconstructed block. | |

* | |

* NOTE: As per the Document JVT-O079, for the whole intra 4x4 macroblock, | |

* 24*lambda is added to the SAD before comparison with the best SAD for | |

* inter prediction. This is an empirical value to prevent using too many intra | |

* blocks. | |

* | |

* @return none | |

* | |

****************************************************************************** | |

*/ | |

void ih264e_evaluate_intra4x4_modes_for_least_cost_rdoptoff | |

( | |

process_ctxt_t *ps_proc_ctxt | |

); | |

/** | |

****************************************************************************** | |

* | |

* @brief | |

* evaluate best chroma intra 8x8 mode (rate distortion opt off) | |

* | |

* @par Description | |

* This function evaluates all the possible chroma intra 8x8 modes and finds | |

* the mode that best represents the macroblock (least distortion) and occupies | |

* fewer bits in the bitstream. | |

* | |

* @param[in] ps_proc_ctxt | |

* pointer to macroblock context (handle) | |

* | |

* @remarks | |

* For chroma best intra pred mode is calculated based only on SAD | |

* | |

* @returns none | |

* | |

****************************************************************************** | |

*/ | |

void ih264e_evaluate_chroma_intra8x8_modes_for_least_cost_rdoptoff | |

( | |

process_ctxt_t *ps_proc_ctxt | |

); | |

/** | |

****************************************************************************** | |

* | |

* @brief | |

* Evaluate best intra 16x16 mode (among VERT, HORZ and DC) and do the | |

* prediction. | |

* | |

* @par Description | |

* This function evaluates first three 16x16 modes and compute corresponding sad | |

* and return the buffer predicted with best mode. | |

* | |

* @param[in] pu1_src | |

* UWORD8 pointer to the source | |

* | |

* @param[in] pu1_ngbr_pels_i16 | |

* UWORD8 pointer to neighbouring pels | |

* | |

* @param[out] pu1_dst | |

* UWORD8 pointer to the destination | |

* | |

* @param[in] src_strd | |

* integer source stride | |

* | |

* @param[in] dst_strd | |

* integer destination stride | |

* | |

* @param[in] u4_n_avblty | |

* availability of neighbouring pixels | |

* | |

* @param[in] u4_intra_mode | |

* Pointer to the variable in which best mode is returned | |

* | |

* @param[in] pu4_sadmin | |

* Pointer to the variable in which minimum sad is returned | |

* | |

* @param[in] u4_valid_intra_modes | |

* Says what all modes are valid | |

* | |

* @returns none | |

* | |

****************************************************************************** | |

*/ | |

typedef void ih264e_evaluate_intra_modes_ft(UWORD8 *pu1_src, | |

UWORD8 *pu1_ngbr_pels_i16, | |

UWORD8 *pu1_dst, | |

UWORD32 src_strd, | |

UWORD32 dst_strd, | |

WORD32 u4_n_avblty, | |

UWORD32 *u4_intra_mode, | |

WORD32 *pu4_sadmin, | |

UWORD32 u4_valid_intra_modes); | |

ih264e_evaluate_intra_modes_ft ih264e_evaluate_intra16x16_modes; | |

ih264e_evaluate_intra_modes_ft ih264e_evaluate_intra_chroma_modes; | |

/* assembly */ | |

ih264e_evaluate_intra_modes_ft ih264e_evaluate_intra16x16_modes_a9q; | |

ih264e_evaluate_intra_modes_ft ih264e_evaluate_intra_chroma_modes_a9q; | |

ih264e_evaluate_intra_modes_ft ih264e_evaluate_intra16x16_modes_av8; | |

ih264e_evaluate_intra_modes_ft ih264e_evaluate_intra_chroma_modes_av8; | |

/* x86 intrinsics */ | |

ih264e_evaluate_intra_modes_ft ih264e_evaluate_intra16x16_modes_ssse3; | |

ih264e_evaluate_intra_modes_ft ih264e_evaluate_intra_chroma_modes_ssse3; | |

/** | |

****************************************************************************** | |

* | |

* @brief | |

* Evaluate best intra 4x4 mode and perform prediction. | |

* | |

* @par Description | |

* This function evaluates 4x4 modes and compute corresponding sad | |

* and return the buffer predicted with best mode. | |

* | |

* @param[in] pu1_src | |

* UWORD8 pointer to the source | |

* | |

* @param[in] pu1_ngbr_pels | |

* UWORD8 pointer to neighbouring pels | |

* | |

* @param[out] pu1_dst | |

* UWORD8 pointer to the destination | |

* | |

* @param[in] src_strd | |

* integer source stride | |

* | |

* @param[in] dst_strd | |

* integer destination stride | |

* | |

* @param[in] u4_n_avblty | |

* availability of neighbouring pixels | |

* | |

* @param[in] u4_intra_mode | |

* Pointer to the variable in which best mode is returned | |

* | |

* @param[in] pu4_sadmin | |

* Pointer to the variable in which minimum cost is returned | |

* | |

* @param[in] u4_valid_intra_modes | |

* Says what all modes are valid | |

* | |

* @param[in] u4_lambda | |

* Lamda value for computing cost from SAD | |

* | |

* @param[in] u4_predictd_mode | |

* Predicted mode for cost computation | |

* | |

* @returns none | |

* | |

****************************************************************************** | |

*/ | |

typedef void ih264e_evaluate_intra_4x4_modes_ft(UWORD8 *pu1_src, | |

UWORD8 *pu1_ngbr_pels, | |

UWORD8 *pu1_dst, | |

UWORD32 src_strd, | |

UWORD32 dst_strd, | |

WORD32 u4_n_avblty, | |

UWORD32 *u4_intra_mode, | |

WORD32 *pu4_sadmin, | |

UWORD32 u4_valid_intra_modes, | |

UWORD32 u4_lambda, | |

UWORD32 u4_predictd_mode); | |

ih264e_evaluate_intra_4x4_modes_ft ih264e_evaluate_intra_4x4_modes; | |

/* x86 intrinsics */ | |

ih264e_evaluate_intra_4x4_modes_ft ih264e_evaluate_intra_4x4_modes_ssse3; | |

/* assembly */ | |

ih264e_evaluate_intra_4x4_modes_ft ih264e_evaluate_intra_4x4_modes_a9q; | |

ih264e_evaluate_intra_4x4_modes_ft ih264e_evaluate_intra_4x4_modes_av8; | |

#endif /* IH264E_INTRA_MODES_EVAL_H_ */ |