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 *  ihevcd_nal.h
22 *
23 * @brief
24 *  Header for NAL related function
25 *
26 * @author
27 *  Harish
28 *
29 * @par List of Functions:
30 *
31 * @remarks
32 *  None
33 *
34 *******************************************************************************
35 */
36 
37 #ifndef _IHEVCD_NAL_H_
38 #define _IHEVCD_NAL_H_
39 /**
40  * Minimum size of start code including NAL type
41  */
42 
43 #define MIN_START_CODE_LEN          4
44 /**
45  * Start code prefix byte - 1
46  */
47 #define START_CODE_PREFIX_BYTE      1
48 
49 /**
50  * Emulation prevention byte - 3
51  */
52 
53 #define EMULATION_PREVENT_BYTE      3
54 /**
55  * Minimum number of zeros before start code
56  */
57 #define NUM_ZEROS_BEFORE_START_CODE 2
58 
59 
60 WORD32 ihevcd_nal_search_start_code(UWORD8 *pu1_buf, WORD32 bytes_remaining);
61 
62 IHEVCD_ERROR_T ihevcd_nal_remv_emuln_bytes(UWORD8 *pu1_src,
63                                            UWORD8 *pu1_dst,
64                                            WORD32 bytes_remaining,
65                                            WORD32 *pi4_nal_len,
66                                            WORD32 *pi4_dst_len);
67 
68 IHEVCD_ERROR_T ihevcd_nal_unit(codec_t *ps_codec);
69 #endif /* _IHEVCD_NAL_H_ */
70