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507 lines
12 KiB
507 lines
12 KiB
/******************************************************************************
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*
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* Copyright (C) 2012 Ittiam Systems Pvt Ltd, Bangalore
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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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/**
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*******************************************************************************
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* @file
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* ihevc_dpb_mgr.c
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*
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* @brief
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* Function definitions used for decoded picture buffer management
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*
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* @author
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* Srinivas T
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*
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* @par List of Functions:
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* - ihevc_dpb_mgr_init()
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* - ihevc_dpb_mgr_del_lt()
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* - ihevc_dpb_mgr_insert_lt()
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* - ihevc_dpb_mgr_del_st_or_make_lt()
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* - ihevc_dpb_mgr_insert_st()
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* - ihevc_dpb_mgr_reset()
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* - ihevc_dpb_mgr_release_pics()
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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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#include <stdio.h>
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#include <stdlib.h>
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#include "ihevc_typedefs.h"
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#include "ihevc_defs.h"
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#include "ihevc_macros.h"
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#include "ihevc_func_selector.h"
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#include "ihevc_structs.h"
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#include "ihevc_buf_mgr.h"
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#include "ihevc_dpb_mgr.h"
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/**
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*******************************************************************************
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*
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* @brief
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* DPB manager initializer
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*
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* @par Description:
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* Initialises the DPB manager structure
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*
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* @param[in] ps_dpb_mgr
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* Pointer to the DPB manager structure
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*
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* @returns
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*
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* @remarks
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*
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*
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*******************************************************************************
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*/
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void ihevc_dpb_mgr_init(dpb_mgr_t *ps_dpb_mgr)
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{
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UWORD32 i;
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dpb_info_t *ps_dpb_info = ps_dpb_mgr->as_dpb_info;
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for(i = 0; i < MAX_DPB_BUFS; i++)
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{
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ps_dpb_info[i].ps_prev_dpb = NULL;
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ps_dpb_info[i].ps_pic_buf = NULL;
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}
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ps_dpb_mgr->u1_num_ref_bufs = 0;
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ps_dpb_mgr->ps_dpb_head = NULL;
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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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* Adds a reference picture into the linked list
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*
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* @par Description:
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* Adds the reference buffer with the given buffer id into the DPB manager
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*
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*
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* @param[in] ps_dpb_mgr
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* Pointer to the DPB manager structure
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*
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* @param[in] ps_picBuf
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* Pointer to the picture buffer
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*
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* @param[in] buf_id
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* buffer id of the picture buffer
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*
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* @returns 0 if successful, -1 otherwise
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*
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* @remarks
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*
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*
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*******************************************************************************
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*/
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WORD32 ihevc_dpb_mgr_insert_ref(dpb_mgr_t *ps_dpb_mgr,
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pic_buf_t *ps_pic_buf,
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WORD32 buf_id)
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{
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int i;
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dpb_info_t *ps_dpb_info;
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ps_dpb_info = ps_dpb_mgr->as_dpb_info;
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/* Return error if buffer is already present in the DPB */
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for(i = 0; i < MAX_DPB_BUFS; i++)
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{
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if((ps_dpb_info[i].ps_pic_buf == ps_pic_buf)
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&& (ps_dpb_info[i].ps_pic_buf->u1_used_as_ref))
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{
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return (-1);
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}
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}
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/* Find an unused DPB location */
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for(i = 0; i < MAX_DPB_BUFS; i++)
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{
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if(NULL == ps_dpb_info[i].ps_pic_buf)
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{
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break;
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}
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}
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if(i == MAX_DPB_BUFS)
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{
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return (-1);
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}
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/* Create DPB info */
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ps_dpb_info[i].ps_pic_buf = ps_pic_buf;
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ps_dpb_info[i].ps_prev_dpb = ps_dpb_mgr->ps_dpb_head;
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ps_dpb_info[i].ps_pic_buf->u1_buf_id = buf_id;
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ps_dpb_info[i].ps_pic_buf->u1_used_as_ref = SHORT_TERM_REF;
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/* update the head node of linked list to point to the current picture */
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ps_dpb_mgr->ps_dpb_head = ps_dpb_info + i;
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/* Increment Short term buffer count */
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ps_dpb_mgr->u1_num_ref_bufs++;
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return 0;
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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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* Deletes a reference buffer from the dpb manager
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*
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* @par Description:
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* Delete short term reference with a given POC from the linked
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* list
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*
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* @param[in] ps_dpb_mgr
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* Pointer to DPB Manager structure
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*
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* @param[in] ps_buf_mgr
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* Pointer to buffer manager structure
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*
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* @param[in] u4_abs_poc
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* Node's absolute poc
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*
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*
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* @returns 0 if successful, -1 otherwise
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*
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* @remarks
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*
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*
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*******************************************************************************
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*/
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void ihevc_dpb_mgr_del_ref(dpb_mgr_t *ps_dpb_mgr,
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buf_mgr_t *ps_buf_mgr,
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WORD32 i4_abs_poc)
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{
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int i;
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dpb_info_t *ps_next_dpb;
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dpb_info_t *ps_unmark_node;
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UWORD8 u1_del_node;
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UNUSED(u1_del_node);
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u1_del_node = 0;
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/* Find the node with matching absolute POC */
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ps_next_dpb = ps_dpb_mgr->ps_dpb_head;
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if(ps_next_dpb->ps_pic_buf->i4_abs_poc == i4_abs_poc)
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{
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ps_unmark_node = ps_next_dpb;
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}
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else
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{
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for(i = 1; i < ps_dpb_mgr->u1_num_ref_bufs; i++)
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{
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if(ps_next_dpb->ps_prev_dpb->ps_pic_buf->i4_abs_poc == i4_abs_poc)
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break;
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ps_next_dpb = ps_next_dpb->ps_prev_dpb;
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}
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if(i == ps_dpb_mgr->u1_num_ref_bufs)
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{
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return;
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}
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else
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ps_unmark_node = ps_next_dpb->ps_prev_dpb;
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}
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if(ps_unmark_node == ps_dpb_mgr->ps_dpb_head)
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{
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ps_dpb_mgr->ps_dpb_head = ps_unmark_node->ps_prev_dpb;
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}
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else
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{
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ps_next_dpb->ps_prev_dpb = ps_unmark_node->ps_prev_dpb; //update link
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ps_unmark_node->ps_prev_dpb = NULL;
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}
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ps_dpb_mgr->u1_num_ref_bufs--; //decrement buffer count
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/* Release the physical buffer */
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ihevc_buf_mgr_release((buf_mgr_t *)ps_buf_mgr, ps_unmark_node->ps_pic_buf->u1_buf_id,
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BUF_MGR_REF);
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ps_unmark_node->ps_prev_dpb = NULL;
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ps_unmark_node->ps_pic_buf = NULL;
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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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* Gets a buffer with abs_poc closest to the current poc
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*
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* @par Description:
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* Returns the pointer to the picture buffer whose poc is equal to abs_poc
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*
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* @param[in] ps_dpb_mgr
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* Pointer to DPB Manager structure
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*
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* @param[out] ps_pic_buf
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* Pointer to picture buffer
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* @param[in] abs_poc
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* poc of the buffer to be returned
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*
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* @returns
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* 0 if successful, pic_buf otherwise
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* @remarks
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*
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*
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*******************************************************************************
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*/
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pic_buf_t* ihevc_dpb_mgr_get_ref_by_nearest_poc(dpb_mgr_t *ps_dpb_mgr, WORD32 cur_abs_poc)
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{
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WORD32 i;
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WORD32 min_diff = 0x7FFFFFFF;
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pic_buf_t *ps_pic_buf = NULL;
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for(i = 0; i < MAX_DPB_BUFS; i++)
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{
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if((ps_dpb_mgr->as_dpb_info[i].ps_pic_buf) &&
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(ps_dpb_mgr->as_dpb_info[i].ps_pic_buf->u1_used_as_ref != UNUSED_FOR_REF))
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{
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WORD32 poc_diff = cur_abs_poc - ps_dpb_mgr->as_dpb_info[i].ps_pic_buf->i4_abs_poc;
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if((poc_diff > 0) && (poc_diff < min_diff))
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{
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min_diff = poc_diff;
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ps_pic_buf = ps_dpb_mgr->as_dpb_info[i].ps_pic_buf;
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}
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}
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}
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if(NULL == ps_pic_buf)
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{
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min_diff = 0x7FFFFFFF;
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for(i = 0; i < MAX_DPB_BUFS; i++)
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{
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if((ps_dpb_mgr->as_dpb_info[i].ps_pic_buf) &&
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(ps_dpb_mgr->as_dpb_info[i].ps_pic_buf->u1_used_as_ref != UNUSED_FOR_REF))
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{
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WORD32 poc_diff = cur_abs_poc - ps_dpb_mgr->as_dpb_info[i].ps_pic_buf->i4_abs_poc;
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if(ABS(poc_diff) < min_diff)
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{
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min_diff = ABS(poc_diff);
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ps_pic_buf = ps_dpb_mgr->as_dpb_info[i].ps_pic_buf;
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}
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}
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}
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}
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return ps_pic_buf;
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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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* Gets a buffer with abs_poc
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*
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* @par Description:
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* Returns the pointer to the picture buffer whose poc is equal to abs_poc
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*
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* @param[in] ps_dpb_mgr
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* Pointer to DPB Manager structure
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*
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* @param[out] ps_pic_buf
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* Pointer to picture buffer
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* @param[in] abs_poc
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* poc of the buffer to be returned
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*
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* @returns
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* 0 if successful, pic_buf otherwise
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* @remarks
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*
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*
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*******************************************************************************
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*/
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pic_buf_t* ihevc_dpb_mgr_get_ref_by_poc(dpb_mgr_t *ps_dpb_mgr, WORD32 abs_poc)
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{
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UWORD32 i;
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dpb_info_t *ps_next_ref;
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pic_buf_t *ps_pic_buf = NULL;
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ps_next_ref = ps_dpb_mgr->ps_dpb_head;
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for(i = 0; i < ps_dpb_mgr->u1_num_ref_bufs; i++)
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{
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if(ps_next_ref->ps_pic_buf->i4_abs_poc == abs_poc)
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{
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ps_pic_buf = ps_next_ref->ps_pic_buf;
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break;
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}
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ps_next_ref = ps_next_ref->ps_prev_dpb;
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}
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if(i == ps_dpb_mgr->u1_num_ref_bufs)
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{
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ps_pic_buf = NULL;
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}
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return ps_pic_buf;
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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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* Gets a buffer with poc_lsb
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*
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* @par Description:
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* Returns the pointer to the picture buffer whose poc is equal to poc_lsb
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*
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* @param[in] ps_dpb_mgr
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* Pointer to DPB Manager structure
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*
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* @param[out] ps_pic_buf
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* Pointer to picture buffer
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* @param[in] poc_lsb
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* poc_lsb of the buffer to be returned
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*
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* @returns
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* 0 if successful, pic_buf otherwise
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* @remarks
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*
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*
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*******************************************************************************
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*/
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pic_buf_t* ihevc_dpb_mgr_get_ref_by_poc_lsb(dpb_mgr_t *ps_dpb_mgr, WORD32 poc_lsb)
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{
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pic_buf_t *ps_pic_buf = NULL;
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UWORD32 i;
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dpb_info_t *ps_next_ref;
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ps_next_ref = ps_dpb_mgr->ps_dpb_head;
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for(i = 0; i < ps_dpb_mgr->u1_num_ref_bufs; i++)
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{
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if(ps_next_ref->ps_pic_buf->i4_poc_lsb == poc_lsb)
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{
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ps_pic_buf = ps_next_ref->ps_pic_buf;
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break;
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}
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ps_next_ref = ps_next_ref->ps_prev_dpb;
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}
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if(i == ps_dpb_mgr->u1_num_ref_bufs)
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{
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ps_pic_buf = NULL;
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}
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return ps_pic_buf;
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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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* Resets the DPB manager
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*
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* @par Description:
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* Re-initialises the DPB manager structure
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*
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* @param[in] ps_dpb_mgr
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* Pointer to DPB Manager structure
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*
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* @param[in] ps_buf_mgr
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* Pointer to buffer manager structure
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*
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* @returns
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*
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* @remarks
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*
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*
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*******************************************************************************
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*/
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void ihevc_dpb_mgr_reset(dpb_mgr_t *ps_dpb_mgr, buf_mgr_t *ps_buf_mgr)
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{
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int i;
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dpb_info_t *ps_dpb_info;
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ps_dpb_info = ps_dpb_mgr->as_dpb_info;
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for(i = 0; i < MAX_DPB_BUFS; i++)
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{
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if(ps_dpb_info[i].ps_pic_buf->u1_used_as_ref)
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{
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ps_dpb_info[i].ps_pic_buf->u1_used_as_ref = UNUSED_FOR_REF;
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ps_dpb_info[i].ps_prev_dpb = NULL;
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//Release physical buffer
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ihevc_buf_mgr_release(ps_buf_mgr, ps_dpb_info[i].ps_pic_buf->u1_buf_id,
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BUF_MGR_REF);
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ps_dpb_info[i].ps_pic_buf = NULL;
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}
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}
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ps_dpb_mgr->u1_num_ref_bufs = 0;
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ps_dpb_mgr->ps_dpb_head = NULL;
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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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* deletes all pictures from DPB
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*
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* @par Description:
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* Deletes all pictures present in the DPB manager
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*
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* @param[in] ps_buf_mgr
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* Pointer to buffer manager structure
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*
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* @param[in] u1_disp_bufs
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* Number of buffers to be deleted
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*
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* @returns
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*
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* @remarks
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*
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*
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*******************************************************************************
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*/
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void ihevc_dpb_mgr_release_pics(buf_mgr_t *ps_buf_mgr, UWORD8 u1_disp_bufs)
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{
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WORD8 i;
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UWORD32 buf_status;
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for(i = 0; i < u1_disp_bufs; i++)
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{
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buf_status = ihevc_buf_mgr_get_status(ps_buf_mgr, i);
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if(0 != buf_status)
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{
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ihevc_buf_mgr_release((buf_mgr_t *)ps_buf_mgr, i, BUF_MGR_REF);
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}
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}
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}
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