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/******************************************************************************
*
* 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
*/
#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
a*/
typedef struct est_sad_t *est_sad_handle;
WORD32 irc_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 irc_init_est_sad(est_sad_handle est_sad, WORD32 i4_use_est_frame_sad);
UWORD32 irc_get_est_sad(est_sad_handle est_sad, picture_type_e e_pic_type);
void irc_update_actual_sad(est_sad_handle est_sad,
UWORD32 u4_actual_sad,
picture_type_e e_pic_type);
void irc_update_actual_sad_for_intra(est_sad_handle est_sad,
WORD32 i4_intra_frm_cost);
void irc_reset_est_sad(est_sad_handle ps_est_sad);
#endif
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