1 /******************************************************************************
2  *
3  *  Copyright (C) 2002-2012 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 AVDTP
22  *  specification.  This file is intended for use internal to AVDT only.
23  *
24  ******************************************************************************/
25 #ifndef AVDT_DEFS_H
26 #define AVDT_DEFS_H
27 
28 /*****************************************************************************
29 ** constants
30 *****************************************************************************/
31 
32 /* signalling packet type */
33 #define AVDT_PKT_TYPE_SINGLE        0       /* single packet */
34 #define AVDT_PKT_TYPE_START         1       /* start packet */
35 #define AVDT_PKT_TYPE_CONT          2       /* continue packet */
36 #define AVDT_PKT_TYPE_END           3       /* end packet */
37 
38 /* signalling message type */
39 #define AVDT_MSG_TYPE_CMD           0       /* command */
40 #define AVDT_MSG_TYPE_GRJ           1       /* general reject */
41 #define AVDT_MSG_TYPE_RSP           2       /* response accept */
42 #define AVDT_MSG_TYPE_REJ           3       /* response reject */
43 
44 /* signalling messages */
45 #define AVDT_SIG_DISCOVER           1       /* discover */
46 #define AVDT_SIG_GETCAP             2       /* get capabilities */
47 #define AVDT_SIG_SETCONFIG          3       /* set configuration */
48 #define AVDT_SIG_GETCONFIG          4       /* get configuration */
49 #define AVDT_SIG_RECONFIG           5       /* reconfigure */
50 #define AVDT_SIG_OPEN               6       /* open */
51 #define AVDT_SIG_START              7       /* start */
52 #define AVDT_SIG_CLOSE              8       /* close */
53 #define AVDT_SIG_SUSPEND            9       /* suspend */
54 #define AVDT_SIG_ABORT              10      /* abort */
55 #define AVDT_SIG_SECURITY           11      /* security control */
56 #define AVDT_SIG_GET_ALLCAP         12      /* get all capabilities */
57 #define AVDT_SIG_DELAY_RPT          13      /* delay report */
58 
59 /* maximum signal value */
60 #define AVDT_SIG_MAX                AVDT_SIG_DELAY_RPT
61 
62 /* used for general reject */
63 #define AVDT_SIG_NONE               0
64 
65 /* some maximum and minimum sizes of signalling messages */
66 #define AVDT_DISCOVER_REQ_MIN       1
67 #define AVDT_DISCOVER_REQ_MAX       124
68 
69 /* service category information element field values */
70 #define AVDT_CAT_TRANS              1       /* Media Transport */
71 #define AVDT_CAT_REPORT             2       /* Reporting */
72 #define AVDT_CAT_RECOV              3       /* Recovery */
73 #define AVDT_CAT_PROTECT            4       /* Content Protection */
74 #define AVDT_CAT_HDRCMP             5       /* Header Compression */
75 #define AVDT_CAT_MUX                6       /* Multiplexing */
76 #define AVDT_CAT_CODEC              7       /* Media Codec */
77 #define AVDT_CAT_DELAY_RPT          8       /* Delay Reporting */
78 #define AVDT_CAT_MAX_CUR            AVDT_CAT_DELAY_RPT
79 
80 /* min/max lengths of service category information elements */
81 #define AVDT_LEN_TRANS_MIN          0
82 #define AVDT_LEN_REPORT_MIN         0
83 #define AVDT_LEN_RECOV_MIN          3
84 #define AVDT_LEN_PROTECT_MIN        2
85 #define AVDT_LEN_HDRCMP_MIN         1
86 #define AVDT_LEN_MUX_MIN            3
87 #define AVDT_LEN_CODEC_MIN          2
88 #define AVDT_LEN_DELAY_RPT_MIN      0
89 
90 #define AVDT_LEN_TRANS_MAX          0
91 #define AVDT_LEN_REPORT_MAX         0
92 #define AVDT_LEN_RECOV_MAX          3
93 #define AVDT_LEN_PROTECT_MAX        255
94 #define AVDT_LEN_HDRCMP_MAX         1
95 #define AVDT_LEN_MUX_MAX            7
96 #define AVDT_LEN_CODEC_MAX          255
97 #define AVDT_LEN_DELAY_RPT_MAX      0
98 
99 /* minimum possible size of configuration or capabilities data */
100 #define AVDT_LEN_CFG_MIN            2
101 
102 /* minimum and maximum lengths for different message types */
103 #define AVDT_LEN_SINGLE             1
104 #define AVDT_LEN_SETCONFIG_MIN      2
105 #define AVDT_LEN_RECONFIG_MIN       1
106 #define AVDT_LEN_MULTI_MIN          1
107 #define AVDT_LEN_SECURITY_MIN       1
108 #define AVDT_LEN_DELAY_RPT          3
109 
110 /* header lengths for different packet types */
111 #define AVDT_LEN_TYPE_SINGLE        2       /* single packet */
112 #define AVDT_LEN_TYPE_START         3       /* start packet */
113 #define AVDT_LEN_TYPE_CONT          1       /* continue packet */
114 #define AVDT_LEN_TYPE_END           1       /* end packet */
115 
116 /* length of general reject message */
117 #define AVDT_LEN_GEN_REJ            2
118 
119 /* recovery service capabilities information elements */
120 #define AVDT_RECOV_MRWS_MIN         0x01    /* min value for maximum recovery window */
121 #define AVDT_RECOV_MRWS_MAX         0x18    /* max value for maximum recovery window */
122 #define AVDT_RECOV_MNMP_MIN         0x01    /* min value for maximum number of media packets */
123 #define AVDT_RECOV_MNMP_MAX         0x18    /* max value for maximum number of media packets */
124 
125 /* SEID value range */
126 #define AVDT_SEID_MIN               0x01
127 #define AVDT_SEID_MAX               0x3E
128 
129 /* first byte of media packet header */
130 #define AVDT_MEDIA_OCTET1           0x80
131 
132 /* for adaptation layer header */
133 #define AVDT_ALH_LCODE_MASK     0x03    /* coding of length field */
134 #define AVDT_ALH_LCODE_NONE     0x00    /* No length field present. Take length from l2cap */
135 #define AVDT_ALH_LCODE_16BIT    0x01    /* 16bit length field */
136 #define AVDT_ALH_LCODE_9BITM0   0x02    /* 9 bit length field, MSB = 0, 8 LSBs in 1 octet following */
137 #define AVDT_ALH_LCODE_9BITM1   0x03    /* 9 bit length field, MSB = 1, 8 LSBs in 1 octet following */
138 
139 #define AVDT_ALH_FRAG_MASK      0x04    /* set this for continuation packet */
140 
141 /*****************************************************************************
142 ** message parsing and building macros
143 *****************************************************************************/
144 
145 #define AVDT_MSG_PRS_HDR(p, lbl, pkt, msg) \
146     lbl = *(p) >> 4; \
147     pkt = (*(p) >> 2) & 0x03; \
148     msg = *(p)++ & 0x03;
149 
150 #define AVDT_MSG_PRS_DISC(p, seid, in_use, type, tsep) \
151     seid = *(p) >> 2; \
152     in_use = (*(p)++ >> 1) & 0x01; \
153     type = *(p) >> 4; \
154     tsep = (*(p)++ >> 3) & 0x01;
155 
156 #define AVDT_MSG_PRS_SIG(p, sig) \
157     sig = *(p)++ & 0x3F;
158 
159 #define AVDT_MSG_PRS_SEID(p, seid) \
160     seid = *(p)++ >> 2;
161 
162 #define AVDT_MSG_PRS_PKT_TYPE(p, pkt) \
163     pkt = (*(p) >> 2) & 0x03;
164 
165 #define AVDT_MSG_PRS_OCTET1(p, o_v, o_p, o_x, o_cc) \
166     o_v = *(p) >> 6; \
167     o_p = (*(p) >> 5) & 0x01; \
168     o_x = (*(p) >> 4) & 0x01; \
169     o_cc = *(p)++ & 0x0F;
170 
171 #define AVDT_MSG_PRS_RPT_OCTET1(p, o_v, o_p, o_cc) \
172     o_v = *(p) >> 6; \
173     o_p = (*(p) >> 5) & 0x01; \
174     o_cc = *(p)++ & 0x1F;
175 
176 #define AVDT_MSG_PRS_M_PT(p, m_pt, marker) \
177     marker = *(p) >> 7; \
178     m_pt = *(p)++ & 0x7F;
179 
180 #define AVDT_MSG_BLD_HDR(p, lbl, pkt, msg) \
181     *(p)++ = (UINT8) ((lbl) << 4) | ((pkt) << 2) | (msg);
182 
183 #define AVDT_MSG_BLD_DISC(p, seid, in_use, type, tsep) \
184     *(p)++ = (UINT8) (((seid) << 2) | ((in_use) << 1)); \
185     *(p)++ = (UINT8) (((type) << 4) | ((tsep) << 3));
186 
187 #define AVDT_MSG_BLD_SIG(p, sig) \
188     *(p)++ = (UINT8) (sig);
189 
190 #define AVDT_MSG_BLD_SEID(p, seid) \
191     *(p)++ = (UINT8) ((seid) << 2);
192 
193 #define AVDT_MSG_BLD_ERR(p, err) \
194     *(p)++ = (UINT8) (err);
195 
196 #define AVDT_MSG_BLD_PARAM(p, param) \
197     *(p)++ = (UINT8) (param);
198 
199 #define AVDT_MSG_BLD_NOSP(p, nosp) \
200     *(p)++ = (UINT8) (nosp);
201 
202 #endif /* AVDT_DEFS_H */
203 
204