/src/libhevc/common/ihevc_dpb_mgr.c

Source
/******************************************************************************
*
* Copyright (C) 2012 Ittiam Systems Pvt Ltd, Bangalore
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************/
/**
 *******************************************************************************
 * @file
 *  ihevc_dpb_mgr.c
 *
 * @brief
 *  Function definitions used for decoded picture buffer management
 *
 * @author
 *  Srinivas T
 *
 * @par List of Functions:
 *   - ihevc_dpb_mgr_init()
 *   - ihevc_dpb_mgr_del_lt()
 *   - ihevc_dpb_mgr_insert_lt()
 *   - ihevc_dpb_mgr_del_st_or_make_lt()
 *   - ihevc_dpb_mgr_insert_st()
 *   - ihevc_dpb_mgr_reset()
 *   - ihevc_dpb_mgr_release_pics()
 *
 * @remarks
 *  None
 *
 *******************************************************************************
 */

#include <stdio.h>
#include <stdlib.h>

#include "ihevc_typedefs.h"
#include "ihevc_defs.h"
#include "ihevc_macros.h"
#include "ihevc_func_selector.h"
#include "ihevc_structs.h"
#include "ihevc_buf_mgr.h"
#include "ihevc_dpb_mgr.h"

/**
 *******************************************************************************
 *
 * @brief
 *  DPB manager initializer
 *
 * @par Description:
 *  Initialises the DPB manager structure
 *
 * @param[in] ps_dpb_mgr
 *  Pointer to the DPB manager structure
 *
 * @returns
 *
 * @remarks
 *
 *
 *******************************************************************************
 */

void ihevc_dpb_mgr_init(dpb_mgr_t *ps_dpb_mgr)
{
    UWORD32 i;
    dpb_info_t *ps_dpb_info = ps_dpb_mgr->as_dpb_info;
    for(i = 0; i < MAX_DPB_BUFS; i++)
    {
        ps_dpb_info[i].ps_prev_dpb = NULL;
        ps_dpb_info[i].ps_pic_buf = NULL;

    }

    ps_dpb_mgr->u1_num_ref_bufs = 0;
    ps_dpb_mgr->ps_dpb_head = NULL;

}


/**
 *******************************************************************************
 *
 * @brief
 *  Adds a reference picture into the linked  list
 *
 * @par Description:
 *  Adds the reference buffer with the given buffer id into the DPB manager
 *
 *
 * @param[in] ps_dpb_mgr
 *  Pointer to the DPB manager structure
 *
 * @param[in] ps_picBuf
 *  Pointer to the picture buffer
 *
 * @param[in] buf_id
 *  buffer id of the picture buffer
 *
 * @returns  0 if successful, -1 otherwise
 *
 * @remarks
 *
 *
 *******************************************************************************
 */

WORD32 ihevc_dpb_mgr_insert_ref(dpb_mgr_t *ps_dpb_mgr,
                                pic_buf_t *ps_pic_buf,
                                WORD32 buf_id)
{
    int i;
    dpb_info_t *ps_dpb_info;

    ps_dpb_info = ps_dpb_mgr->as_dpb_info;

    /* Return error if buffer is already present in the DPB */
    for(i = 0; i < MAX_DPB_BUFS; i++)
    {
        if((ps_dpb_info[i].ps_pic_buf == ps_pic_buf)
                        && (ps_dpb_info[i].ps_pic_buf->u1_used_as_ref))
        {
            return (-1);
        }


    }

    /* Find an unused DPB location */
    for(i = 0; i < MAX_DPB_BUFS; i++)
    {
        if(NULL == ps_dpb_info[i].ps_pic_buf)
        {
            break;
        }
    }
    if(i == MAX_DPB_BUFS)
    {
        return (-1);
    }

    /* Create DPB info */
    ps_dpb_info[i].ps_pic_buf = ps_pic_buf;
    ps_dpb_info[i].ps_prev_dpb = ps_dpb_mgr->ps_dpb_head;
    ps_dpb_info[i].ps_pic_buf->u1_buf_id = buf_id;
    ps_dpb_info[i].ps_pic_buf->u1_used_as_ref = SHORT_TERM_REF;

    /* update the head node of linked list to point to the current picture */
    ps_dpb_mgr->ps_dpb_head = ps_dpb_info + i;

    /* Increment Short term buffer count */
    ps_dpb_mgr->u1_num_ref_bufs++;

    return 0;
}

/**
 *******************************************************************************
 *
 * @brief
 *  Deletes a reference buffer from the dpb manager
 *
 * @par Description:
 *  Delete short term reference with a given POC from the linked
 *  list
 *
 * @param[in] ps_dpb_mgr
 *  Pointer to DPB Manager structure
 *
 * @param[in] ps_buf_mgr
 *  Pointer to buffer manager structure
 *
 * @param[in] u4_abs_poc
 *  Node's absolute poc
 *
 *
 * @returns  0 if successful, -1 otherwise
 *
 * @remarks
 *
 *
 *******************************************************************************
 */

void ihevc_dpb_mgr_del_ref(dpb_mgr_t *ps_dpb_mgr,
                           buf_mgr_t *ps_buf_mgr,
                           WORD32 i4_abs_poc)
{
    int i;
    dpb_info_t *ps_next_dpb;

    dpb_info_t *ps_unmark_node;
    UWORD8 u1_del_node;
    UNUSED(u1_del_node);
    u1_del_node = 0;

    /* Find the node with matching absolute POC */
    ps_next_dpb = ps_dpb_mgr->ps_dpb_head;
    if(ps_next_dpb->ps_pic_buf->i4_abs_poc == i4_abs_poc)
    {
        ps_unmark_node = ps_next_dpb;
    }
    else
    {
        for(i = 1; i < ps_dpb_mgr->u1_num_ref_bufs; i++)
        {
            if(ps_next_dpb->ps_prev_dpb->ps_pic_buf->i4_abs_poc == i4_abs_poc)
                break;
            ps_next_dpb = ps_next_dpb->ps_prev_dpb;
        }

        if(i == ps_dpb_mgr->u1_num_ref_bufs)
        {
            return;
        }
        else
            ps_unmark_node = ps_next_dpb->ps_prev_dpb;
    }

    if(ps_unmark_node == ps_dpb_mgr->ps_dpb_head)
    {
        ps_dpb_mgr->ps_dpb_head = ps_unmark_node->ps_prev_dpb;
    }
    else
    {
        ps_next_dpb->ps_prev_dpb = ps_unmark_node->ps_prev_dpb; //update link
        ps_unmark_node->ps_prev_dpb = NULL;
    }
    ps_dpb_mgr->u1_num_ref_bufs--; //decrement buffer count

    /* Release the physical buffer */
    ihevc_buf_mgr_release((buf_mgr_t *)ps_buf_mgr, ps_unmark_node->ps_pic_buf->u1_buf_id,
                          BUF_MGR_REF);
    ps_unmark_node->ps_prev_dpb = NULL;
    ps_unmark_node->ps_pic_buf = NULL;
}


/**
 *******************************************************************************
 *
 * @brief
 *  Gets a buffer with abs_poc closest to the current poc
 *
 * @par Description:
 *  Returns the pointer to the picture buffer whose poc is equal to abs_poc
 *
 * @param[in] ps_dpb_mgr
 *  Pointer to DPB Manager structure
 *
 * @param[out] ps_pic_buf
 *  Pointer to picture buffer

 * @param[in] abs_poc
 *  poc of the buffer to be returned
 *
 * @returns
 *  0 if successful, pic_buf otherwise
 * @remarks
 *
 *
 *******************************************************************************
 */
pic_buf_t* ihevc_dpb_mgr_get_ref_by_nearest_poc(dpb_mgr_t *ps_dpb_mgr, WORD32 cur_abs_poc)
{
    WORD32 i;
    WORD32 min_diff = 0x7FFFFFFF;
    pic_buf_t *ps_pic_buf = NULL;

    for(i = 0; i < MAX_DPB_BUFS; i++)
    {
        if((ps_dpb_mgr->as_dpb_info[i].ps_pic_buf) &&
                        (ps_dpb_mgr->as_dpb_info[i].ps_pic_buf->u1_used_as_ref != UNUSED_FOR_REF))
        {
            WORD32 poc_diff = cur_abs_poc - ps_dpb_mgr->as_dpb_info[i].ps_pic_buf->i4_abs_poc;
            if((poc_diff > 0) && (poc_diff < min_diff))
            {
                min_diff = poc_diff;
                ps_pic_buf = ps_dpb_mgr->as_dpb_info[i].ps_pic_buf;
            }
        }
    }

    if(NULL == ps_pic_buf)
    {
        min_diff = 0x7FFFFFFF;
        for(i = 0; i < MAX_DPB_BUFS; i++)
        {
            if((ps_dpb_mgr->as_dpb_info[i].ps_pic_buf) &&
                            (ps_dpb_mgr->as_dpb_info[i].ps_pic_buf->u1_used_as_ref != UNUSED_FOR_REF))
            {
                WORD32 poc_diff = cur_abs_poc - ps_dpb_mgr->as_dpb_info[i].ps_pic_buf->i4_abs_poc;
                if(ABS(poc_diff) < min_diff)
                {
                    min_diff = ABS(poc_diff);
                    ps_pic_buf = ps_dpb_mgr->as_dpb_info[i].ps_pic_buf;
                }
            }
        }
    }

    return ps_pic_buf;
}


/**
 *******************************************************************************
 *
 * @brief
 *  Gets a buffer with abs_poc
 *
 * @par Description:
 *  Returns the pointer to the picture buffer whose poc is equal to abs_poc
 *
 * @param[in] ps_dpb_mgr
 *  Pointer to DPB Manager structure
 *
 * @param[out] ps_pic_buf
 *  Pointer to picture buffer

 * @param[in] abs_poc
 *  poc of the buffer to be returned
 *
 * @returns
 *  0 if successful, pic_buf otherwise
 * @remarks
 *
 *
 *******************************************************************************
 */
pic_buf_t* ihevc_dpb_mgr_get_ref_by_poc(dpb_mgr_t *ps_dpb_mgr, WORD32 abs_poc)
{
    UWORD32 i;
    dpb_info_t *ps_next_ref;
    pic_buf_t *ps_pic_buf = NULL;


    ps_next_ref = ps_dpb_mgr->ps_dpb_head;
    for(i = 0; i < ps_dpb_mgr->u1_num_ref_bufs; i++)
    {
        if(ps_next_ref->ps_pic_buf->i4_abs_poc == abs_poc)
        {
            ps_pic_buf = ps_next_ref->ps_pic_buf;
            break;
        }

        ps_next_ref = ps_next_ref->ps_prev_dpb;
    }

    if(i == ps_dpb_mgr->u1_num_ref_bufs)
    {
        ps_pic_buf = NULL;
    }

    return ps_pic_buf;
}

/**
 *******************************************************************************
 *
 * @brief
 *  Gets a buffer with poc_lsb
 *
 * @par Description:
 *  Returns the pointer to the picture buffer whose poc is equal to poc_lsb
 *
 * @param[in] ps_dpb_mgr
 *  Pointer to DPB Manager structure
 *
 * @param[out] ps_pic_buf
 *  Pointer to picture buffer

 * @param[in] poc_lsb
 *  poc_lsb of the buffer to be returned
 *
 * @returns
 *  0 if successful, pic_buf otherwise
 * @remarks
 *
 *
 *******************************************************************************
 */

pic_buf_t* ihevc_dpb_mgr_get_ref_by_poc_lsb(dpb_mgr_t *ps_dpb_mgr, WORD32 poc_lsb)
{
    pic_buf_t *ps_pic_buf = NULL;
    UWORD32 i;
    dpb_info_t *ps_next_ref;

    ps_next_ref = ps_dpb_mgr->ps_dpb_head;
    for(i = 0; i < ps_dpb_mgr->u1_num_ref_bufs; i++)
    {
        if(ps_next_ref->ps_pic_buf->i4_poc_lsb == poc_lsb)
        {
            ps_pic_buf = ps_next_ref->ps_pic_buf;
            break;
        }

        ps_next_ref = ps_next_ref->ps_prev_dpb;
    }

    if(i == ps_dpb_mgr->u1_num_ref_bufs)
    {
        ps_pic_buf = NULL;
    }

    return ps_pic_buf;
}


/**
 *******************************************************************************
 *
 * @brief
 *  Resets the DPB manager
 *
 * @par Description:
 *  Re-initialises the DPB manager structure
 *
 * @param[in] ps_dpb_mgr
 *  Pointer to DPB Manager structure
 *
 * @param[in] ps_buf_mgr
 *  Pointer to buffer manager structure
 *
 * @returns
 *
 * @remarks
 *
 *
 *******************************************************************************
 */

void ihevc_dpb_mgr_reset(dpb_mgr_t *ps_dpb_mgr, buf_mgr_t *ps_buf_mgr)
{
    int i;
    dpb_info_t *ps_dpb_info;

    ps_dpb_info = ps_dpb_mgr->as_dpb_info;

    for(i = 0; i < MAX_DPB_BUFS; i++)
    {
        if(ps_dpb_info[i].ps_pic_buf->u1_used_as_ref)
        {
            ps_dpb_info[i].ps_pic_buf->u1_used_as_ref = UNUSED_FOR_REF;
            ps_dpb_info[i].ps_prev_dpb = NULL;
            //Release physical buffer
            ihevc_buf_mgr_release(ps_buf_mgr, ps_dpb_info[i].ps_pic_buf->u1_buf_id,
                                  BUF_MGR_REF);

            ps_dpb_info[i].ps_pic_buf = NULL;
        }
    }
    ps_dpb_mgr->u1_num_ref_bufs = 0;
    ps_dpb_mgr->ps_dpb_head = NULL;

}

/**
 *******************************************************************************
 *
 * @brief
 *  deletes all pictures from DPB
 *
 * @par Description:
 *  Deletes all pictures present in the DPB manager
 *
 * @param[in] ps_buf_mgr
 *  Pointer to buffer manager structure
 *
 * @param[in] u1_disp_bufs
 *  Number of buffers to be deleted
 *
 * @returns
 *
 * @remarks
 *
 *
 *******************************************************************************
 */

void ihevc_dpb_mgr_release_pics(buf_mgr_t *ps_buf_mgr, UWORD8 u1_disp_bufs)
{
    WORD8 i;
    UWORD32 buf_status;

    for(i = 0; i < u1_disp_bufs; i++)
    {
        buf_status = ihevc_buf_mgr_get_status(ps_buf_mgr, i);
        if(0 != buf_status)
        {
            ihevc_buf_mgr_release((buf_mgr_t *)ps_buf_mgr, i, BUF_MGR_REF);
        }
    }
}

Coverage Report

Created: 2025-11-11 07:01

Line	Count	Source
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		* @file
21		* ihevc_dpb_mgr.c
22		*
23		* @brief
24		* Function definitions used for decoded picture buffer management
25		*
26		* @author
27		* Srinivas T
28		*
29		* @par List of Functions:
30		* - ihevc_dpb_mgr_init()
31		* - ihevc_dpb_mgr_del_lt()
32		* - ihevc_dpb_mgr_insert_lt()
33		* - ihevc_dpb_mgr_del_st_or_make_lt()
34		* - ihevc_dpb_mgr_insert_st()
35		* - ihevc_dpb_mgr_reset()
36		* - ihevc_dpb_mgr_release_pics()
37		*
38		* @remarks
39		* None
40		*
41		*******************************************************************************
42		*/
43
44		#include <stdio.h>
45		#include <stdlib.h>
46
47		#include "ihevc_typedefs.h"
48		#include "ihevc_defs.h"
49		#include "ihevc_macros.h"
50		#include "ihevc_func_selector.h"
51		#include "ihevc_structs.h"
52		#include "ihevc_buf_mgr.h"
53		#include "ihevc_dpb_mgr.h"
54
55		/**
56		*******************************************************************************
57		*
58		* @brief
59		* DPB manager initializer
60		*
61		* @par Description:
62		* Initialises the DPB manager structure
63		*
64		* @param[in] ps_dpb_mgr
65		* Pointer to the DPB manager structure
66		*
67		* @returns
68		*
69		* @remarks
70		*
71		*
72		*******************************************************************************
73		*/
74
75		void ihevc_dpb_mgr_init(dpb_mgr_t *ps_dpb_mgr)
76	2.03k	{
77	2.03k	UWORD32 i;
78	2.03k	dpb_info_t *ps_dpb_info = ps_dpb_mgr->as_dpb_info;
79	132k	for(i = 0; i < MAX_DPB_BUFS; i++)
80	130k	{
81	130k	ps_dpb_info[i].ps_prev_dpb = NULL;
82	130k	ps_dpb_info[i].ps_pic_buf = NULL;
83
84	130k	}
85
86	2.03k	ps_dpb_mgr->u1_num_ref_bufs = 0;
87	2.03k	ps_dpb_mgr->ps_dpb_head = NULL;
88
89	2.03k	}
90
91
92		/**
93		*******************************************************************************
94		*
95		* @brief
96		* Adds a reference picture into the linked list
97		*
98		* @par Description:
99		* Adds the reference buffer with the given buffer id into the DPB manager
100		*
101		*
102		* @param[in] ps_dpb_mgr
103		* Pointer to the DPB manager structure
104		*
105		* @param[in] ps_picBuf
106		* Pointer to the picture buffer
107		*
108		* @param[in] buf_id
109		* buffer id of the picture buffer
110		*
111		* @returns 0 if successful, -1 otherwise
112		*
113		* @remarks
114		*
115		*
116		*******************************************************************************
117		*/
118
119		WORD32 ihevc_dpb_mgr_insert_ref(dpb_mgr_t *ps_dpb_mgr,
120		pic_buf_t *ps_pic_buf,
121		WORD32 buf_id)
122	16.1k	{
123	16.1k	int i;
124	16.1k	dpb_info_t *ps_dpb_info;
125
126	16.1k	ps_dpb_info = ps_dpb_mgr->as_dpb_info;
127
128		/* Return error if buffer is already present in the DPB */
129	1.05M	for(i = 0; i < MAX_DPB_BUFS; i++)
130	1.03M	{
131	1.03M	if((ps_dpb_info[i].ps_pic_buf == ps_pic_buf)
132	0	&& (ps_dpb_info[i].ps_pic_buf->u1_used_as_ref))
133	0	{
134	0	return (-1);
135	0	}
136
137
138	1.03M	}
139
140		/* Find an unused DPB location */
141	23.9k	for(i = 0; i < MAX_DPB_BUFS; i++)
142	23.9k	{
143	23.9k	if(NULL == ps_dpb_info[i].ps_pic_buf)
144	16.1k	{
145	16.1k	break;
146	16.1k	}
147	23.9k	}
148	16.1k	if(i == MAX_DPB_BUFS)
149	0	{
150	0	return (-1);
151	0	}
152
153		/* Create DPB info */
154	16.1k	ps_dpb_info[i].ps_pic_buf = ps_pic_buf;
155	16.1k	ps_dpb_info[i].ps_prev_dpb = ps_dpb_mgr->ps_dpb_head;
156	16.1k	ps_dpb_info[i].ps_pic_buf->u1_buf_id = buf_id;
157	16.1k	ps_dpb_info[i].ps_pic_buf->u1_used_as_ref = SHORT_TERM_REF;
158
159		/* update the head node of linked list to point to the current picture */
160	16.1k	ps_dpb_mgr->ps_dpb_head = ps_dpb_info + i;
161
162		/* Increment Short term buffer count */
163	16.1k	ps_dpb_mgr->u1_num_ref_bufs++;
164
165	16.1k	return 0;
166	16.1k	}
167
168		/**
169		*******************************************************************************
170		*
171		* @brief
172		* Deletes a reference buffer from the dpb manager
173		*
174		* @par Description:
175		* Delete short term reference with a given POC from the linked
176		* list
177		*
178		* @param[in] ps_dpb_mgr
179		* Pointer to DPB Manager structure
180		*
181		* @param[in] ps_buf_mgr
182		* Pointer to buffer manager structure
183		*
184		* @param[in] u4_abs_poc
185		* Node's absolute poc
186		*
187		*
188		* @returns 0 if successful, -1 otherwise
189		*
190		* @remarks
191		*
192		*
193		*******************************************************************************
194		*/
195
196		void ihevc_dpb_mgr_del_ref(dpb_mgr_t *ps_dpb_mgr,
197		buf_mgr_t *ps_buf_mgr,
198		WORD32 i4_abs_poc)
199	14.3k	{
200	14.3k	int i;
201	14.3k	dpb_info_t *ps_next_dpb;
202
203	14.3k	dpb_info_t *ps_unmark_node;
204	14.3k	UWORD8 u1_del_node;
205	14.3k	UNUSED(u1_del_node);
206	14.3k	u1_del_node = 0;
207
208		/* Find the node with matching absolute POC */
209	14.3k	ps_next_dpb = ps_dpb_mgr->ps_dpb_head;
210	14.3k	if(ps_next_dpb->ps_pic_buf->i4_abs_poc == i4_abs_poc)
211	12.3k	{
212	12.3k	ps_unmark_node = ps_next_dpb;
213	12.3k	}
214	2.05k	else
215	2.05k	{
216	2.79k	for(i = 1; i < ps_dpb_mgr->u1_num_ref_bufs; i++)
217	2.79k	{
218	2.79k	if(ps_next_dpb->ps_prev_dpb->ps_pic_buf->i4_abs_poc == i4_abs_poc)
219	2.05k	break;
220	732	ps_next_dpb = ps_next_dpb->ps_prev_dpb;
221	732	}
222
223	2.05k	if(i == ps_dpb_mgr->u1_num_ref_bufs)
224	0	{
225	0	return;
226	0	}
227	2.05k	else
228	2.05k	ps_unmark_node = ps_next_dpb->ps_prev_dpb;
229	2.05k	}
230
231	14.3k	if(ps_unmark_node == ps_dpb_mgr->ps_dpb_head)
232	12.3k	{
233	12.3k	ps_dpb_mgr->ps_dpb_head = ps_unmark_node->ps_prev_dpb;
234	12.3k	}
235	2.05k	else
236	2.05k	{
237	2.05k	ps_next_dpb->ps_prev_dpb = ps_unmark_node->ps_prev_dpb; //update link
238	2.05k	ps_unmark_node->ps_prev_dpb = NULL;
239	2.05k	}
240	14.3k	ps_dpb_mgr->u1_num_ref_bufs--; //decrement buffer count
241
242		/* Release the physical buffer */
243	14.3k	ihevc_buf_mgr_release((buf_mgr_t *)ps_buf_mgr, ps_unmark_node->ps_pic_buf->u1_buf_id,
244	14.3k	BUF_MGR_REF);
245	14.3k	ps_unmark_node->ps_prev_dpb = NULL;
246	14.3k	ps_unmark_node->ps_pic_buf = NULL;
247	14.3k	}
248
249
250		/**
251		*******************************************************************************
252		*
253		* @brief
254		* Gets a buffer with abs_poc closest to the current poc
255		*
256		* @par Description:
257		* Returns the pointer to the picture buffer whose poc is equal to abs_poc
258		*
259		* @param[in] ps_dpb_mgr
260		* Pointer to DPB Manager structure
261		*
262		* @param[out] ps_pic_buf
263		* Pointer to picture buffer
264
265		* @param[in] abs_poc
266		* poc of the buffer to be returned
267		*
268		* @returns
269		* 0 if successful, pic_buf otherwise
270		* @remarks
271		*
272		*
273		*******************************************************************************
274		*/
275		pic_buf_t* ihevc_dpb_mgr_get_ref_by_nearest_poc(dpb_mgr_t *ps_dpb_mgr, WORD32 cur_abs_poc)
276	41.3k	{
277	41.3k	WORD32 i;
278	41.3k	WORD32 min_diff = 0x7FFFFFFF;
279	41.3k	pic_buf_t *ps_pic_buf = NULL;
280
281	2.69M	for(i = 0; i < MAX_DPB_BUFS; i++)
282	2.64M	{
283	2.64M	if((ps_dpb_mgr->as_dpb_info[i].ps_pic_buf) &&
284	62.3k	(ps_dpb_mgr->as_dpb_info[i].ps_pic_buf->u1_used_as_ref != UNUSED_FOR_REF))
285	50.5k	{
286	50.5k	WORD32 poc_diff = cur_abs_poc - ps_dpb_mgr->as_dpb_info[i].ps_pic_buf->i4_abs_poc;
287	50.5k	if((poc_diff > 0) && (poc_diff < min_diff))
288	21.7k	{
289	21.7k	min_diff = poc_diff;
290	21.7k	ps_pic_buf = ps_dpb_mgr->as_dpb_info[i].ps_pic_buf;
291	21.7k	}
292	50.5k	}
293	2.64M	}
294
295	41.3k	if(NULL == ps_pic_buf)
296	24.6k	{
297	24.6k	min_diff = 0x7FFFFFFF;
298	1.60M	for(i = 0; i < MAX_DPB_BUFS; i++)
299	1.57M	{
300	1.57M	if((ps_dpb_mgr->as_dpb_info[i].ps_pic_buf) &&
301	19.9k	(ps_dpb_mgr->as_dpb_info[i].ps_pic_buf->u1_used_as_ref != UNUSED_FOR_REF))
302	11.3k	{
303	11.3k	WORD32 poc_diff = cur_abs_poc - ps_dpb_mgr->as_dpb_info[i].ps_pic_buf->i4_abs_poc;
304	11.3k	if(ABS(poc_diff) < min_diff)
305	10.3k	{
306	10.3k	min_diff = ABS(poc_diff);
307	10.3k	ps_pic_buf = ps_dpb_mgr->as_dpb_info[i].ps_pic_buf;
308	10.3k	}
309	11.3k	}
310	1.57M	}
311	24.6k	}
312
313	41.3k	return ps_pic_buf;
314	41.3k	}
315
316
317		/**
318		*******************************************************************************
319		*
320		* @brief
321		* Gets a buffer with abs_poc
322		*
323		* @par Description:
324		* Returns the pointer to the picture buffer whose poc is equal to abs_poc
325		*
326		* @param[in] ps_dpb_mgr
327		* Pointer to DPB Manager structure
328		*
329		* @param[out] ps_pic_buf
330		* Pointer to picture buffer
331
332		* @param[in] abs_poc
333		* poc of the buffer to be returned
334		*
335		* @returns
336		* 0 if successful, pic_buf otherwise
337		* @remarks
338		*
339		*
340		*******************************************************************************
341		*/
342		pic_buf_t* ihevc_dpb_mgr_get_ref_by_poc(dpb_mgr_t *ps_dpb_mgr, WORD32 abs_poc)
343	47.2k	{
344	47.2k	UWORD32 i;
345	47.2k	dpb_info_t *ps_next_ref;
346	47.2k	pic_buf_t *ps_pic_buf = NULL;
347
348
349	47.2k	ps_next_ref = ps_dpb_mgr->ps_dpb_head;
350	117k	for(i = 0; i < ps_dpb_mgr->u1_num_ref_bufs; i++)
351	100k	{
352	100k	if(ps_next_ref->ps_pic_buf->i4_abs_poc == abs_poc)
353	30.7k	{
354	30.7k	ps_pic_buf = ps_next_ref->ps_pic_buf;
355	30.7k	break;
356	30.7k	}
357
358	69.9k	ps_next_ref = ps_next_ref->ps_prev_dpb;
359	69.9k	}
360
361	47.2k	if(i == ps_dpb_mgr->u1_num_ref_bufs)
362	16.5k	{
363	16.5k	ps_pic_buf = NULL;
364	16.5k	}
365
366	47.2k	return ps_pic_buf;
367	47.2k	}
368
369		/**
370		*******************************************************************************
371		*
372		* @brief
373		* Gets a buffer with poc_lsb
374		*
375		* @par Description:
376		* Returns the pointer to the picture buffer whose poc is equal to poc_lsb
377		*
378		* @param[in] ps_dpb_mgr
379		* Pointer to DPB Manager structure
380		*
381		* @param[out] ps_pic_buf
382		* Pointer to picture buffer
383
384		* @param[in] poc_lsb
385		* poc_lsb of the buffer to be returned
386		*
387		* @returns
388		* 0 if successful, pic_buf otherwise
389		* @remarks
390		*
391		*
392		*******************************************************************************
393		*/
394
395		pic_buf_t* ihevc_dpb_mgr_get_ref_by_poc_lsb(dpb_mgr_t *ps_dpb_mgr, WORD32 poc_lsb)
396	2.40k	{
397	2.40k	pic_buf_t *ps_pic_buf = NULL;
398	2.40k	UWORD32 i;
399	2.40k	dpb_info_t *ps_next_ref;
400
401	2.40k	ps_next_ref = ps_dpb_mgr->ps_dpb_head;
402	4.49k	for(i = 0; i < ps_dpb_mgr->u1_num_ref_bufs; i++)
403	3.13k	{
404	3.13k	if(ps_next_ref->ps_pic_buf->i4_poc_lsb == poc_lsb)
405	1.04k	{
406	1.04k	ps_pic_buf = ps_next_ref->ps_pic_buf;
407	1.04k	break;
408	1.04k	}
409
410	2.08k	ps_next_ref = ps_next_ref->ps_prev_dpb;
411	2.08k	}
412
413	2.40k	if(i == ps_dpb_mgr->u1_num_ref_bufs)
414	1.36k	{
415	1.36k	ps_pic_buf = NULL;
416	1.36k	}
417
418	2.40k	return ps_pic_buf;
419	2.40k	}
420
421
422		/**
423		*******************************************************************************
424		*
425		* @brief
426		* Resets the DPB manager
427		*
428		* @par Description:
429		* Re-initialises the DPB manager structure
430		*
431		* @param[in] ps_dpb_mgr
432		* Pointer to DPB Manager structure
433		*
434		* @param[in] ps_buf_mgr
435		* Pointer to buffer manager structure
436		*
437		* @returns
438		*
439		* @remarks
440		*
441		*
442		*******************************************************************************
443		*/
444
445		void ihevc_dpb_mgr_reset(dpb_mgr_t ps_dpb_mgr, buf_mgr_t ps_buf_mgr)
446	0	{
447	0	int i;
448	0	dpb_info_t *ps_dpb_info;
449
450	0	ps_dpb_info = ps_dpb_mgr->as_dpb_info;
451
452	0	for(i = 0; i < MAX_DPB_BUFS; i++)
453	0	{
454	0	if(ps_dpb_info[i].ps_pic_buf->u1_used_as_ref)
455	0	{
456	0	ps_dpb_info[i].ps_pic_buf->u1_used_as_ref = UNUSED_FOR_REF;
457	0	ps_dpb_info[i].ps_prev_dpb = NULL;
458		//Release physical buffer
459	0	ihevc_buf_mgr_release(ps_buf_mgr, ps_dpb_info[i].ps_pic_buf->u1_buf_id,
460	0	BUF_MGR_REF);
461
462	0	ps_dpb_info[i].ps_pic_buf = NULL;
463	0	}
464	0	}
465	0	ps_dpb_mgr->u1_num_ref_bufs = 0;
466	0	ps_dpb_mgr->ps_dpb_head = NULL;
467
468	0	}
469
470		/**
471		*******************************************************************************
472		*
473		* @brief
474		* deletes all pictures from DPB
475		*
476		* @par Description:
477		* Deletes all pictures present in the DPB manager
478		*
479		* @param[in] ps_buf_mgr
480		* Pointer to buffer manager structure
481		*
482		* @param[in] u1_disp_bufs
483		* Number of buffers to be deleted
484		*
485		* @returns
486		*
487		* @remarks
488		*
489		*
490		*******************************************************************************
491		*/
492
493		void ihevc_dpb_mgr_release_pics(buf_mgr_t *ps_buf_mgr, UWORD8 u1_disp_bufs)
494	0	{
495	0	WORD8 i;
496	0	UWORD32 buf_status;
497
498	0	for(i = 0; i < u1_disp_bufs; i++)
499	0	{
500	0	buf_status = ihevc_buf_mgr_get_status(ps_buf_mgr, i);
501	0	if(0 != buf_status)
502	0	{
503	0	ihevc_buf_mgr_release((buf_mgr_t *)ps_buf_mgr, i, BUF_MGR_REF);
504	0	}
505	0	}
506	0	}