261 lines
9.1 KiB
C
261 lines
9.1 KiB
C
/******************************************************************************
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*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*****************************************************************************
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* Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
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*/
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/*****************************************************************************/
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/* Includes */
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/*****************************************************************************/
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/* User include files */
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#include "irc_datatypes.h"
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#include "irc_cntrl_param.h"
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#include "irc_mem_req_and_acq.h"
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#include "irc_est_sad.h"
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#include "irc_common.h"
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typedef struct est_sad_t
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{
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WORD32 i4_use_est_intra_sad;
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/* Previous frame SAD */
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UWORD32 au4_prev_frm_sad[MAX_PIC_TYPE];
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/* Current (nth) ifi average P frame SAD */
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UWORD32 u4_n_p_frm_ifi_avg_sad;
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/* (n-1)th ifi average P frame SAD */
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UWORD32 u4_n_1_p_frm_ifi_avg_sad;
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/* (n-2)th ifi average P frame SAD */
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UWORD32 u4_n_2_p_frm_ifi_avg_sad;
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/* number of ifi encoded till now */
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WORD32 i4_num_ifi_encoded;
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/* number of P frames in the current IFI */
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WORD32 i4_num_p_frm_in_cur_ifi;
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} est_sad_t;
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WORD32 irc_est_sad_num_fill_use_free_memtab(est_sad_t **pps_est_sad,
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itt_memtab_t *ps_memtab,
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ITT_FUNC_TYPE_E e_func_type)
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{
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WORD32 i4_mem_tab_idx = 0;
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est_sad_t s_est_sad;
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/* Hack for al alloc, during which we don't have any state memory.
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* Dereferencing can cause issues
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*/
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if(e_func_type == GET_NUM_MEMTAB || e_func_type == FILL_MEMTAB)
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(*pps_est_sad) = &s_est_sad;
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/* For src rate control state structure */
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if(e_func_type != GET_NUM_MEMTAB)
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{
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fill_memtab(&ps_memtab[i4_mem_tab_idx], sizeof(est_sad_t),
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ALIGN_128_BYTE, PERSISTENT, DDR);
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use_or_fill_base(&ps_memtab[0], (void**)pps_est_sad, e_func_type);
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}
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i4_mem_tab_idx++;
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return (i4_mem_tab_idx);
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}
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void irc_init_est_sad(est_sad_t *ps_est_sad, WORD32 i4_use_est_intra_sad)
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{
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WORD32 i;
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ps_est_sad->i4_use_est_intra_sad = i4_use_est_intra_sad;
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for(i = 0; i < MAX_PIC_TYPE; i++)
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{
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ps_est_sad->au4_prev_frm_sad[i] = 0;
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}
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ps_est_sad->u4_n_p_frm_ifi_avg_sad = 0;
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ps_est_sad->u4_n_1_p_frm_ifi_avg_sad = 0;
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ps_est_sad->u4_n_2_p_frm_ifi_avg_sad = 0;
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ps_est_sad->i4_num_ifi_encoded = 0;
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ps_est_sad->i4_num_p_frm_in_cur_ifi = 0;
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}
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void irc_reset_est_sad(est_sad_t *ps_est_sad)
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{
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irc_init_est_sad(ps_est_sad, ps_est_sad->i4_use_est_intra_sad);
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}
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/*
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* Get estimated SAD can be called at any point. The various use cases are:
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* 1) When a I frame is getting encoded,
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* - get the estimated of P => No issues since we use the last coded P frame
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* value
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* - get estimated of I => This call for two cases:
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* => a) if num_ifi_encoded is less than 2
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* then return the previous encoded I frame sad
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* => b) if num_ifi_encoded is more than 2, then we scale
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* the prev I sad by the ratio of (n-1) ifi P to n-2 ifi P
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* 2) When P frame is getting encoded,
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* - get the estimated of P => No issues since we use the last coded P frame value
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* - get the estimated of I => Simillar to I we have two cases.
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* To handle the b) case extra logic had to introduced using
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* u1_is_n_1_p_frm_ifi_avg_sad_usable flag
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*/
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UWORD32 irc_get_est_sad(est_sad_t *ps_est_sad, picture_type_e e_pic_type)
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{
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if(ps_est_sad->i4_use_est_intra_sad)
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{
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UWORD32 u4_estimated_sad;
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if(e_pic_type == P_PIC)
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{
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u4_estimated_sad = ps_est_sad->au4_prev_frm_sad[P_PIC];
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}
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else if(e_pic_type == B_PIC)
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{
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u4_estimated_sad = ps_est_sad->au4_prev_frm_sad[B_PIC];
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}
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else
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{
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if(ps_est_sad->i4_num_ifi_encoded < 2)
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{
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/*
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* Only one IFI has been encoded and so use the previous I
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* frames SAD
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*/
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u4_estimated_sad = ps_est_sad->au4_prev_frm_sad[I_PIC];
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}
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else
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{
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/*
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* Since the n-1 'P' frame IFI would have just accumulated the
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* frame sads we average it out here
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*/
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UWORD32 u4_n_1_p_frm_ifi_avg_sad, u4_n_2_p_frm_ifi_avg_sad;
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number_t vq_n_1_p_frm_ifi_avg_sad, vq_n_2_p_frm_ifi_avg_sad;
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number_t vq_prev_frm_sad_i;
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/*
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* If there are frames in the current IFI start using it to
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* estimate the I frame SAD
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*/
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if(ps_est_sad->i4_num_p_frm_in_cur_ifi)
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{
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u4_n_1_p_frm_ifi_avg_sad =
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(ps_est_sad->u4_n_p_frm_ifi_avg_sad
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/ ps_est_sad->i4_num_p_frm_in_cur_ifi);
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u4_n_2_p_frm_ifi_avg_sad =
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ps_est_sad->u4_n_1_p_frm_ifi_avg_sad;
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}
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else
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{
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u4_n_1_p_frm_ifi_avg_sad =
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ps_est_sad->u4_n_1_p_frm_ifi_avg_sad;
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u4_n_2_p_frm_ifi_avg_sad =
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ps_est_sad->u4_n_2_p_frm_ifi_avg_sad;
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}
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/*
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* If any of the previous p frame SADs are zeros we just return
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* the previous I frame SAD
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*/
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if(u4_n_1_p_frm_ifi_avg_sad && u4_n_2_p_frm_ifi_avg_sad)
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{
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SET_VAR_Q(vq_prev_frm_sad_i,
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ps_est_sad->au4_prev_frm_sad[I_PIC], 0);
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SET_VAR_Q(vq_n_1_p_frm_ifi_avg_sad,
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u4_n_1_p_frm_ifi_avg_sad, 0);
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SET_VAR_Q(vq_n_2_p_frm_ifi_avg_sad,
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u4_n_2_p_frm_ifi_avg_sad, 0);
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/*
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* Estimated SAD =
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*(n-1)th intra frame interval(ifi) P frame Avg SAD *
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*(prev I frame SAD /
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*(prev (n-2)nd intra frame interval(ifi) P frame Avg SAD)
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*/
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mult32_var_q(vq_prev_frm_sad_i, vq_n_1_p_frm_ifi_avg_sad,
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&vq_prev_frm_sad_i);
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div32_var_q(vq_prev_frm_sad_i, vq_n_2_p_frm_ifi_avg_sad,
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&vq_prev_frm_sad_i);
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number_t_to_word32(vq_prev_frm_sad_i,
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(WORD32*)&u4_estimated_sad);
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}
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else
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{
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u4_estimated_sad = ps_est_sad->au4_prev_frm_sad[I_PIC];
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}
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}
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}
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return u4_estimated_sad;
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}
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else
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{
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return ps_est_sad->au4_prev_frm_sad[e_pic_type];
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}
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}
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void irc_update_actual_sad(est_sad_t *ps_est_sad,
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UWORD32 u4_actual_sad,
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picture_type_e e_pic_type)
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{
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ps_est_sad->au4_prev_frm_sad[e_pic_type] = u4_actual_sad;
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if(ps_est_sad->i4_use_est_intra_sad)
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{
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if(e_pic_type == I_PIC)
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{
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/* The requirement is to have two IFI before estimating I frame SAD */
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if(ps_est_sad->i4_num_ifi_encoded < 2)
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ps_est_sad->i4_num_ifi_encoded++;
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/* Calculate the average SAD */
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if(ps_est_sad->i4_num_p_frm_in_cur_ifi)
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{
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ps_est_sad->u4_n_p_frm_ifi_avg_sad /=
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ps_est_sad->i4_num_p_frm_in_cur_ifi;
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}
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else
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{
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ps_est_sad->u4_n_p_frm_ifi_avg_sad = 0;
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}
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/* Push the (n-1)th average SAD to the (n-2)th average SAD */
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ps_est_sad->u4_n_2_p_frm_ifi_avg_sad =
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ps_est_sad->u4_n_1_p_frm_ifi_avg_sad;
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/* Push the nth average SAD to the (n-1)th average SAD */
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ps_est_sad->u4_n_1_p_frm_ifi_avg_sad =
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ps_est_sad->u4_n_p_frm_ifi_avg_sad;
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/* Reset SAD and number of P frames */
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ps_est_sad->u4_n_p_frm_ifi_avg_sad = 0;
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ps_est_sad->i4_num_p_frm_in_cur_ifi = 0;
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}
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else
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{
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ps_est_sad->u4_n_p_frm_ifi_avg_sad += u4_actual_sad;
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ps_est_sad->i4_num_p_frm_in_cur_ifi++;
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}
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}
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}
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void irc_update_actual_sad_for_intra(est_sad_t *ps_est_sad,
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WORD32 i4_intra_frm_cost)
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{
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if(!(ps_est_sad->i4_use_est_intra_sad))
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{
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irc_update_actual_sad(ps_est_sad, i4_intra_frm_cost, I_PIC);
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}
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}
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