1 /*****************************************************************************
2  * Copyright (C) 2013 x265 project
3  *
4  * Authors: Steve Borho <steve@borho.org>
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (at your option) any later version.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02111, USA.
19  *
20  * This program is also available under a commercial proprietary license.
21  * For more information, contact us at license @ x265.com.
22  *****************************************************************************/
23 
24 #ifndef X265_DPB_H
25 #define X265_DPB_H
26 
27 #include "piclist.h"
28 
29 namespace X265_NS {
30 // private namespace for x265
31 
32 class Frame;
33 class FrameData;
34 class Slice;
35 
36 class DPB
37 {
38 public:
39 
40     int                m_lastIDR;
41     int                m_pocCRA;
42     int                m_maxRefL0;
43     int                m_maxRefL1;
44     int                m_bOpenGOP;
45     bool               m_bRefreshPending;
46     bool               m_bTemporalSublayer;
47     PicList            m_picList;
48     PicList            m_freeList;
49     FrameData*         m_frameDataFreeList;
50 
DPB(x265_param * param)51     DPB(x265_param *param)
52     {
53         m_lastIDR = 0;
54         m_pocCRA = 0;
55         m_bRefreshPending = false;
56         m_frameDataFreeList = NULL;
57         m_maxRefL0 = param->maxNumReferences;
58         m_maxRefL1 = param->bBPyramid ? 2 : 1;
59         m_bOpenGOP = param->bOpenGOP;
60         m_bTemporalSublayer = !!param->bEnableTemporalSubLayers;
61     }
62 
63     ~DPB();
64 
65     void prepareEncode(Frame*);
66 
67     void recycleUnreferenced();
68 
69 protected:
70 
71     void computeRPS(int curPoc, bool isRAP, RPS * rps, unsigned int maxDecPicBuffer);
72 
73     void applyReferencePictureSet(RPS *rps, int curPoc);
74     void decodingRefreshMarking(int pocCurr, NalUnitType nalUnitType);
75 
76     NalUnitType getNalUnitType(int curPoc, bool bIsKeyFrame);
77 };
78 }
79 
80 #endif // X265_DPB_H
81