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      1 /******************************************************************************
      2 *
      3 * Copyright (C) 2012 Ittiam Systems Pvt Ltd, Bangalore
      4 *
      5 * Licensed under the Apache License, Version 2.0 (the "License");
      6 * you may not use this file except in compliance with the License.
      7 * You may obtain a copy of the License at:
      8 *
      9 * http://www.apache.org/licenses/LICENSE-2.0
     10 *
     11 * Unless required by applicable law or agreed to in writing, software
     12 * distributed under the License is distributed on an "AS IS" BASIS,
     13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     14 * See the License for the specific language governing permissions and
     15 * limitations under the License.
     16 *
     17 ******************************************************************************/
     18 
     19 /**
     20  *******************************************************************************
     21  * @file
     22  *  ihevc_dpb_mgr.h
     23  *
     24  * @brief
     25  *  Function declarations used for decoded picture buffer management
     26  *
     27  * @author
     28  *  Srinivas T
     29  *
     30  *
     31  * @remarks
     32  *  None
     33  *
     34  *******************************************************************************
     35  */
     36 #ifndef _DPB_MANAGER_H
     37 #define _DPB_MANAGER_H
     38 
     39 /* Temporary definitions. Have to be defined later */
     40 
     41 #define MAX_DPB_BUFS                (MAX_DPB_SIZE * 4)
     42 
     43 #define MARK_ST_PICNUM_AS_NONREF    1
     44 #define MARK_LT_INDEX_AS_NONREF     2
     45 #define MARK_ST_PICNUM_AS_LT_INDEX  3
     46 #define RESET_REF_PICTURES          5
     47 
     48 typedef struct dpb_info_t dpb_info_t;
     49 
     50 enum
     51 {
     52     UNUSED_FOR_REF = 0,
     53     LONG_TERM_REF,
     54     SHORT_TERM_REF,
     55 };
     56 struct dpb_info_t
     57 {
     58     /**
     59      * Pointer to picture buffer structure
     60      */
     61     pic_buf_t *ps_pic_buf;
     62 
     63     /**
     64      * Link to the DPB buffer with previous pic Num
     65      */
     66     dpb_info_t *ps_prev_dpb;
     67 
     68 };
     69 
     70 typedef struct
     71 {
     72     /**
     73      * Pointer to the most recent pic Num
     74      */
     75     dpb_info_t *ps_dpb_head;
     76 
     77     /**
     78      * Physical storage for dpbInfo for ref bufs
     79      */
     80     dpb_info_t as_dpb_info[MAX_DPB_BUFS];
     81 
     82     /**
     83      * Number of reference buffers
     84      */
     85     UWORD8 u1_num_ref_bufs;
     86 
     87 }dpb_mgr_t;
     88 
     89 void ihevc_dpb_mgr_init(dpb_mgr_t *ps_dpb_mgr);
     90 
     91 WORD32 ihevc_dpb_mgr_insert_ref(dpb_mgr_t *ps_dpb_mgr,
     92                                 pic_buf_t *ps_pic_buf,
     93                                 WORD32 buf_id);
     94 
     95 void ihevc_dpb_mgr_del_ref(dpb_mgr_t *ps_dpb_mgr,
     96                            buf_mgr_t *ps_buf_mgr,
     97                            WORD32 u4_abs_poc);
     98 
     99 pic_buf_t* ihevc_dpb_mgr_get_ref_by_nearest_poc(dpb_mgr_t *ps_dpb_mgr, WORD32 cur_abs_poc);
    100 
    101 pic_buf_t* ihevc_dpb_mgr_get_ref_by_poc(dpb_mgr_t *ps_dpb_mgr, WORD32 abs_poc);
    102 
    103 pic_buf_t* ihevc_dpb_mgr_get_ref_by_poc_lsb(dpb_mgr_t *ps_dpb_mgr, WORD32 poc_lsb);
    104 
    105 void ihevc_dpb_mgr_reset(dpb_mgr_t *ps_dpb_mgr, buf_mgr_t *ps_buf_mgr);
    106 
    107 void ihevc_dpb_mgr_release_pics(buf_mgr_t *ps_buf_mgr, UWORD8 u1_disp_bufs);
    108 
    109 #endif /*  _DPB_MANAGER_H */
    110