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450 lines
15 KiB
450 lines
15 KiB
/******************************************************************************
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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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*******************************************************************************
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* @file
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* ih264e_mc.c
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*
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* @brief
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* Contains definition of functions for motion compensation
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*
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* @author
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* ittiam
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*
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* @par List of Functions:
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* - ih264e_motion_comp_luma()
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* - ih264e_motion_comp_chroma()
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*
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* @remarks
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* None
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*
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*******************************************************************************
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*/
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/*****************************************************************************/
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/* File Includes */
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/*****************************************************************************/
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/* System include files */
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#include <stdio.h>
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/* User include files */
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#include "ih264_typedefs.h"
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#include "ih264_defs.h"
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#include "iv2.h"
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#include "ive2.h"
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#include "ime_distortion_metrics.h"
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#include "ime_defs.h"
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#include "ime_structs.h"
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#include "ih264_structs.h"
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#include "ih264_inter_pred_filters.h"
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#include "ih264_mem_fns.h"
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#include "ih264_padding.h"
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#include "ih264_intra_pred_filters.h"
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#include "ih264_deblk_edge_filters.h"
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#include "ih264_trans_quant_itrans_iquant.h"
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#include "ih264_cabac_tables.h"
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#include "ih264e_defs.h"
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#include "ih264e_error.h"
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#include "ih264e_bitstream.h"
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#include "irc_cntrl_param.h"
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#include "irc_frame_info_collector.h"
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#include "ih264e_rate_control.h"
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#include "ih264e_cabac_structs.h"
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#include "ih264e_structs.h"
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#include "ih264e_mc.h"
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#include "ih264e_half_pel.h"
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/*****************************************************************************/
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/* Function Definitions */
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/*****************************************************************************/
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/**
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******************************************************************************
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*
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* @brief
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* performs motion compensation for a luma mb for the given mv.
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*
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* @par Description
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* This routine performs motion compensation of an inter mb. When the inter
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* mb mode is P16x16, there is no need to copy 16x16 unit from reference buffer
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* to pred buffer. In this case the function returns pointer and stride of the
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* ref. buffer and this info is used in place of pred buffer else where.
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* In other cases, the pred buffer is populated via copy / filtering + copy
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* (q pel cases) and returned.
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*
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* @param[in] ps_proc
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* pointer to current proc ctxt
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*
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* @param[out] pu1_pseudo_pred
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* pseudo prediction buffer
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*
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* @param[out] u4_pseudo_pred_strd
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* pseudo pred buffer stride
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*
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* @return none
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*
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* @remarks Assumes half pel buffers for the entire frame are populated.
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*
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******************************************************************************
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*/
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void ih264e_motion_comp_luma(process_ctxt_t *ps_proc, UWORD8 **pu1_pseudo_pred,
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WORD32 *pi4_pseudo_pred_strd)
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{
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/* codec context */
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codec_t *ps_codec = ps_proc->ps_codec;
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/* me ctxt */
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me_ctxt_t *ps_me_ctxt = &ps_proc->s_me_ctxt;
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/* Pointer to the structure having motion vectors, size and position of curr partitions */
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enc_pu_t *ps_curr_pu;
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/* pointers to full pel, half pel x, half pel y, half pel xy reference buffer */
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UWORD8 *pu1_ref[4];
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/* pred buffer ptr */
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UWORD8 *pu1_pred;
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/* strides of full pel, half pel x, half pel y, half pel xy reference buffer */
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WORD32 i4_ref_strd[4];
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/* pred buffer stride */
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WORD32 i4_pred_strd = ps_proc->i4_pred_strd;
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/* full pel motion vectors */
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WORD32 u4_mv_x_full, u4_mv_y_full;
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/* half pel motion vectors */
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WORD32 u4_mv_x_hpel, u4_mv_y_hpel;
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/* quarter pel motion vectors */
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WORD32 u4_mv_x_qpel, u4_mv_y_qpel;
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/* width & height of the partition */
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UWORD32 wd, ht;
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/* partition idx */
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UWORD32 u4_num_prtn;
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/* half / qpel coefficient */
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UWORD32 u4_subpel_factor;
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/* BIPRED Flag */
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WORD32 i4_bipred_flag;
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/* temp var */
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UWORD32 u4_lkup_idx1;
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/* Init */
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i4_ref_strd[0] = ps_proc->i4_rec_strd;
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i4_ref_strd[1] = i4_ref_strd[2] = i4_ref_strd[3] =
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ps_me_ctxt->u4_subpel_buf_strd;
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for (u4_num_prtn = 0; u4_num_prtn < ps_proc->u4_num_sub_partitions;
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u4_num_prtn++)
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{
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mv_t *ps_curr_mv;
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/* update ptr to curr partition */
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ps_curr_pu = ps_proc->ps_pu + u4_num_prtn;
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/* Set no no bipred */
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i4_bipred_flag = 0;
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switch (ps_curr_pu->b2_pred_mode)
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{
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case PRED_L0:
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ps_curr_mv = &ps_curr_pu->s_me_info[0].s_mv;
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pu1_ref[0] = ps_proc->apu1_ref_buf_luma[0];
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break;
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case PRED_L1:
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ps_curr_mv = &ps_curr_pu->s_me_info[1].s_mv;
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pu1_ref[0] = ps_proc->apu1_ref_buf_luma[1];
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break;
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case PRED_BI:
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/*
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* In case of PRED_BI, we only need to ensure that
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* the reference buffer that gets selected is
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* ps_proc->pu1_best_subpel_buf
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*/
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/* Dummy */
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ps_curr_mv = &ps_curr_pu->s_me_info[0].s_mv;
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pu1_ref[0] = ps_proc->apu1_ref_buf_luma[0];
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i4_bipred_flag = 1;
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break;
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default:
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ps_curr_mv = &ps_curr_pu->s_me_info[0].s_mv;
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pu1_ref[0] = ps_proc->apu1_ref_buf_luma[0];
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break;
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}
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/* get full pel mv's (full pel units) */
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u4_mv_x_full = ps_curr_mv->i2_mvx >> 2;
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u4_mv_y_full = ps_curr_mv->i2_mvy >> 2;
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/* get half pel mv's */
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u4_mv_x_hpel = (ps_curr_mv->i2_mvx & 0x2) >> 1;
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u4_mv_y_hpel = (ps_curr_mv->i2_mvy & 0x2) >> 1;
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/* get quarter pel mv's */
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u4_mv_x_qpel = (ps_curr_mv->i2_mvx & 0x1);
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u4_mv_y_qpel = (ps_curr_mv->i2_mvy & 0x1);
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/* width and height of partition */
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wd = (ps_curr_pu->b4_wd + 1) << 2;
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ht = (ps_curr_pu->b4_ht + 1) << 2;
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/* decision ? qpel/hpel, fpel */
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u4_subpel_factor = (u4_mv_y_hpel << 3) + (u4_mv_x_hpel << 2)
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+ (u4_mv_y_qpel << 1) + (u4_mv_x_qpel);
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/* Move ref to position given by MV */
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pu1_ref[0] += ((u4_mv_y_full * i4_ref_strd[0]) + u4_mv_x_full);
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/* Sub pel ptrs/ Biperd pointers init */
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pu1_ref[1] = ps_proc->pu1_best_subpel_buf;
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i4_ref_strd[1] = ps_proc->u4_bst_spel_buf_strd;
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/* update pred buff ptr */
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pu1_pred = ps_proc->pu1_pred_mb
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+ 4 * ps_curr_pu->b4_pos_y * i4_pred_strd
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+ 4 * ps_curr_pu->b4_pos_x;
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/* u4_lkup_idx1 will be non zero for half pel and bipred */
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u4_lkup_idx1 = ((u4_subpel_factor >> 2) != 0) || i4_bipred_flag;
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{
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/********************************************************************/
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/* if the block is P16x16 MB and mv are not quarter pel motion */
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/* vectors, there is no need to copy 16x16 unit from reference frame*/
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/* to pred buffer. We might as well send the reference frame buffer */
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/* pointer as pred buffer (ofc with updated stride) to fwd transform*/
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/* and inverse transform unit. */
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/********************************************************************/
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if (ps_proc->u4_num_sub_partitions == 1)
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{
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*pu1_pseudo_pred = pu1_ref[u4_lkup_idx1];
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*pi4_pseudo_pred_strd = i4_ref_strd[u4_lkup_idx1];
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}
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/*
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* Copying half pel or full pel to prediction buffer
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* Currently ps_proc->u4_num_sub_partitions will always be 1 as we only support 16x16 in P mbs
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*/
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else
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{
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ps_codec->pf_inter_pred_luma_copy(pu1_ref[u4_lkup_idx1],
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pu1_pred,
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i4_ref_strd[u4_lkup_idx1],
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i4_pred_strd, ht, wd, NULL,
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0);
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}
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}
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}
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}
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/**
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******************************************************************************
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*
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* @brief
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* performs motion compensation for chroma mb
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*
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* @par Description
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* Copies a MB of data from the reference buffer (Full pel, half pel or q pel)
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* according to the motion vectors given
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*
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* @param[in] ps_proc
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* pointer to current proc ctxt
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*
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* @return none
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*
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* @remarks Assumes half pel and quarter pel buffers for the entire frame are
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* populated.
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******************************************************************************
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*/
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void ih264e_motion_comp_chroma(process_ctxt_t *ps_proc)
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{
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/* codec context */
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codec_t *ps_codec = ps_proc->ps_codec;
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/* Pointer to the structure having motion vectors, size and position of curr partitions */
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enc_pu_t *ps_curr_pu;
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/* pointers to full pel, half pel x, half pel y, half pel xy reference buffer */
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UWORD8 *pu1_ref;
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/* pred buffer ptr */
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UWORD8 *pu1_pred;
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/* strides of full pel reference buffer */
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WORD32 i4_ref_strd = ps_proc->i4_rec_strd;
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/* pred buffer stride */
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WORD32 i4_pred_strd = ps_proc->i4_pred_strd;
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/* full pel motion vectors */
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WORD32 u4_mv_x_full, u4_mv_y_full;
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/* half pel motion vectors */
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WORD32 u4_mv_x_hpel, u4_mv_y_hpel;
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/* quarter pel motion vectors */
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WORD32 u4_mv_x_qpel, u4_mv_y_qpel;
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/* width & height of the partition */
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UWORD32 wd, ht;
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/* partition idx */
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UWORD32 u4_num_prtn;
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WORD32 u4_mv_x;
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WORD32 u4_mv_y;
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UWORD8 u1_dx, u1_dy;
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for (u4_num_prtn = 0; u4_num_prtn < ps_proc->u4_num_sub_partitions;
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u4_num_prtn++)
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{
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mv_t *ps_curr_mv;
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ps_curr_pu = ps_proc->ps_pu + u4_num_prtn;
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if (ps_curr_pu->b2_pred_mode != PRED_BI)
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{
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ps_curr_mv = &ps_curr_pu->s_me_info[ps_curr_pu->b2_pred_mode].s_mv;
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pu1_ref = ps_proc->apu1_ref_buf_chroma[ps_curr_pu->b2_pred_mode];
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u4_mv_x = ps_curr_mv->i2_mvx >> 3;
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u4_mv_y = ps_curr_mv->i2_mvy >> 3;
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/* corresponds to full pel motion vector in luma, but in chroma corresponds to pel formed wiith dx, dy =4 */
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u4_mv_x_full = (ps_curr_mv->i2_mvx & 0x4) >> 2;
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u4_mv_y_full = (ps_curr_mv->i2_mvy & 0x4) >> 2;
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/* get half pel mv's */
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u4_mv_x_hpel = (ps_curr_mv->i2_mvx & 0x2) >> 1;
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u4_mv_y_hpel = (ps_curr_mv->i2_mvy & 0x2) >> 1;
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/* get quarter pel mv's */
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u4_mv_x_qpel = (ps_curr_mv->i2_mvx & 0x1);
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u4_mv_y_qpel = (ps_curr_mv->i2_mvy & 0x1);
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/* width and height of sub macro block */
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wd = (ps_curr_pu->b4_wd + 1) << 1;
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ht = (ps_curr_pu->b4_ht + 1) << 1;
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/* move the pointers so that they point to the motion compensated locations */
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pu1_ref += ((u4_mv_y * i4_ref_strd) + (u4_mv_x << 1));
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pu1_pred = ps_proc->pu1_pred_mb
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+ 4 * ps_curr_pu->b4_pos_y * i4_pred_strd
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+ 2 * ps_curr_pu->b4_pos_x;
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u1_dx = (u4_mv_x_full << 2) + (u4_mv_x_hpel << 1) + (u4_mv_x_qpel);
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u1_dy = (u4_mv_y_full << 2) + (u4_mv_y_hpel << 1) + (u4_mv_y_qpel);
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/* cases where u1_dx = 0 or u1_dy = 0 are dealt separately in neon with
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* separate functions for better performance
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*
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* ih264_inter_pred_chroma_dx_zero_a9q
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* and
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* ih264_inter_pred_chroma_dy_zero_a9q
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*/
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ps_codec->pf_inter_pred_chroma(pu1_ref, pu1_pred, i4_ref_strd,
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i4_pred_strd, u1_dx, u1_dy, ht, wd);
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}
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else /* If the pred mode is PRED_BI */
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{
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/*
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* We need to interpolate the L0 and L1 ref pics with the chorma MV
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* then use them to average for bilinrar interpred
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*/
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WORD32 i4_predmode;
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UWORD8 *pu1_ref_buf[2];
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/* Temporary buffers to store the interpolated value from L0 and L1 */
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pu1_ref_buf[PRED_L0] = ps_proc->apu1_subpel_buffs[0];
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pu1_ref_buf[PRED_L1] = ps_proc->apu1_subpel_buffs[1];
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for (i4_predmode = 0; i4_predmode < PRED_BI; i4_predmode++)
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{
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ps_curr_mv = &ps_curr_pu->s_me_info[i4_predmode].s_mv;
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pu1_ref = ps_proc->apu1_ref_buf_chroma[i4_predmode];
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u4_mv_x = ps_curr_mv->i2_mvx >> 3;
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u4_mv_y = ps_curr_mv->i2_mvy >> 3;
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/*
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* corresponds to full pel motion vector in luma, but in chroma
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* corresponds to pel formed wiith dx, dy =4
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*/
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u4_mv_x_full = (ps_curr_mv->i2_mvx & 0x4) >> 2;
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u4_mv_y_full = (ps_curr_mv->i2_mvy & 0x4) >> 2;
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/* get half pel mv's */
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u4_mv_x_hpel = (ps_curr_mv->i2_mvx & 0x2) >> 1;
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u4_mv_y_hpel = (ps_curr_mv->i2_mvy & 0x2) >> 1;
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/* get quarter pel mv's */
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u4_mv_x_qpel = (ps_curr_mv->i2_mvx & 0x1);
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u4_mv_y_qpel = (ps_curr_mv->i2_mvy & 0x1);
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/* width and height of sub macro block */
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wd = (ps_curr_pu->b4_wd + 1) << 1;
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ht = (ps_curr_pu->b4_ht + 1) << 1;
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/* move the pointers so that they point to the motion compensated locations */
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pu1_ref += ((u4_mv_y * i4_ref_strd) + (u4_mv_x << 1));
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pu1_pred = ps_proc->pu1_pred_mb
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+ 4 * ps_curr_pu->b4_pos_y * i4_pred_strd
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+ 2 * ps_curr_pu->b4_pos_x;
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u1_dx = (u4_mv_x_full << 2) + (u4_mv_x_hpel << 1)
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+ (u4_mv_x_qpel);
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u1_dy = (u4_mv_y_full << 2) + (u4_mv_y_hpel << 1)
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+ (u4_mv_y_qpel);
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ps_codec->pf_inter_pred_chroma(pu1_ref,
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pu1_ref_buf[i4_predmode],
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i4_ref_strd, MB_SIZE, u1_dx,
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u1_dy, ht, wd);
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}
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ps_codec->pf_inter_pred_luma_bilinear(pu1_ref_buf[PRED_L0],
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pu1_ref_buf[PRED_L1], pu1_pred,
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MB_SIZE, MB_SIZE,
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i4_pred_strd, MB_SIZE >> 1,
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MB_SIZE);
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}
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}
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}
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