1 /******************************************************************************
2  *
3  *  Copyright (C) 2003-2012 Broadcom Corporation
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  *  This contains constants definitions and other information from the AVCTP
22  *  specification.  This file is intended for use internal to AVCT only.
23  *
24  ******************************************************************************/
25 #ifndef AVCT_DEFS_H
26 #define AVCT_DEFS_H
27 
28 /*****************************************************************************
29 ** constants
30 *****************************************************************************/
31 
32 /* packet type */
33 #define AVCT_PKT_TYPE_SINGLE        0       /* single packet */
34 #define AVCT_PKT_TYPE_START         1       /* start packet */
35 #define AVCT_PKT_TYPE_CONT          2       /* continue packet */
36 #define AVCT_PKT_TYPE_END           3       /* end packet */
37 
38 /* header lengths for different packet types */
39 #define AVCT_HDR_LEN_SINGLE         3
40 #define AVCT_HDR_LEN_START          4
41 #define AVCT_HDR_LEN_CONT           1
42 #define AVCT_HDR_LEN_END            1
43 
44 /* invalid cr+ipid value */
45 #define AVCT_CR_IPID_INVALID        1
46 
47 /*****************************************************************************
48 ** message parsing and building macros
49 *****************************************************************************/
50 
51 #define AVCT_BLD_HDR(p, label, type, cr_ipid) \
52     *(p)++ = ((label) << 4) | ((type) << 2) | (cr_ipid);
53 
54 #define AVCT_PRS_HDR(p, label, type, cr_ipid) \
55     label = *(p) >> 4; \
56     type = (*(p) >> 2) & 3; \
57     cr_ipid = *(p)++ & 3;
58 
59 #define AVCT_PRS_PKT_TYPE(p, type) \
60     type = (*(p) >> 2) & 3;
61 
62 #endif /* AVCT_DEFS_H */
63