| /****************************************************************************** |
| * |
| * Copyright (C) 2018 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 est_sad.h |
| * |
| * \brief |
| * This file contain SAD estimation functions declarations |
| * |
| * \date |
| * |
| * \author |
| * ittiam |
| * |
| ****************************************************************************** |
| */ |
| |
| #ifndef _EST_SAD_H_ |
| #define _EST_SAD_H_ |
| |
| /* "est_sad_t->i4_use_est_intra_sad" Flag to control how the I frame SAD is estimated. |
| If set to zero |
| - it uses the Intra sad calculated by the previous P frame as |
| the estimated sad for the current I frame |
| else |
| - it uses the ratio of P frame sads of the previous two GOPS and |
| scales the I Frame sad with this ratio to estimate the current |
| I frame SAD |
| */ |
| |
| /* Estimating the Average SAD for the current picture type is done by: |
| 1) if picture_type is I |
| - Estimated SAD = (n-1)th intra frame interval(ifi) P frame Avg SAD * |
| ( prev I frame SAD / (n-2)nd intra frame interval(ifi) P frame Avg SAD) |
| - if only one IFI is encoded use the previous I frame SAD |
| 2) if picture type is P |
| - Estimate SAD is previous P frame SAD |
| 3) The first P frame in a IFI could use a little better logic to decide the |
| estimated SAD but currently we assume the last coded P frames SAD */ |
| |
| /*****************************************************************************/ |
| /* Structure */ |
| /*****************************************************************************/ |
| typedef struct est_sad_t *est_sad_handle; |
| |
| /*****************************************************************************/ |
| /* Function Declarations */ |
| /*****************************************************************************/ |
| WORD32 est_sad_num_fill_use_free_memtab( |
| est_sad_handle *est_sad, itt_memtab_t *ps_memtab, ITT_FUNC_TYPE_E e_func_type); |
| |
| void init_est_sad(est_sad_handle est_sad, WORD32 i4_use_est_frame_sad); |
| |
| UWORD32 get_est_sad(est_sad_handle est_sad, picture_type_e e_pic_type); |
| |
| void update_actual_sad(est_sad_handle est_sad, UWORD32 u4_actual_sad, picture_type_e e_pic_type); |
| |
| void update_actual_sad_for_intra(est_sad_handle est_sad, WORD32 i4_intra_frm_cost); |
| |
| void update_prev_frame_intra_sad(est_sad_handle ps_est_sad, WORD32 i4_intra_frm_sad); |
| |
| WORD32 get_prev_frame_intra_sad(est_sad_handle ps_est_sad); |
| |
| void update_prev_frame_sad(est_sad_handle ps_est_sad, WORD32 i4_frm_sad, picture_type_e e_pic_type); |
| |
| WORD32 get_prev_frame_sad(est_sad_handle ps_est_sad, picture_type_e e_pic_type); |
| |
| void reset_est_sad(est_sad_handle ps_est_sad); |
| |
| WORD32 update_ppic_sad(est_sad_handle est_sad, WORD32 i4_est_sad, WORD32 i4_prev_p_sad); |
| #endif |