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 * Interface to AVRCP optional commands
22 *
23 ******************************************************************************/
24 #include <base/logging.h>
25 #include <string.h>
26
27 #include "avrc_api.h"
28 #include "avrc_int.h"
29 #include "bt_common.h"
30
31 /******************************************************************************
32 *
33 * Function avrc_vendor_msg
34 *
35 * Description Compose a VENDOR DEPENDENT command according to p_msg
36 *
37 * Input Parameters:
38 * p_msg: Pointer to VENDOR DEPENDENT message structure.
39 *
40 * Output Parameters:
41 * None.
42 *
43 * Returns pointer to a valid GKI buffer if successful.
44 * NULL if p_msg is NULL.
45 *
46 *****************************************************************************/
avrc_vendor_msg(tAVRC_MSG_VENDOR * p_msg)47 static BT_HDR* avrc_vendor_msg(tAVRC_MSG_VENDOR* p_msg) {
48 BT_HDR* p_cmd;
49 uint8_t* p_data;
50
51 CHECK(p_msg != NULL);
52
53 #if (AVRC_METADATA_INCLUDED == TRUE)
54 CHECK(AVRC_META_CMD_BUF_SIZE > (AVRC_MIN_CMD_LEN + p_msg->vendor_len));
55 p_cmd = (BT_HDR*)osi_malloc(AVRC_META_CMD_BUF_SIZE);
56 #else
57 CHECK(AVRC_CMD_BUF_SIZE > (AVRC_MIN_CMD_LEN + p_msg->vendor_len));
58 p_cmd = (BT_HDR*)osi_malloc(AVRC_CMD_BUF_SIZE);
59 #endif
60
61 p_cmd->offset = AVCT_MSG_OFFSET;
62 p_data = (uint8_t*)(p_cmd + 1) + p_cmd->offset;
63 *p_data++ = (p_msg->hdr.ctype & AVRC_CTYPE_MASK);
64 *p_data++ =
65 (p_msg->hdr.subunit_type << AVRC_SUBTYPE_SHIFT) | p_msg->hdr.subunit_id;
66 *p_data++ = AVRC_OP_VENDOR;
67 AVRC_CO_ID_TO_BE_STREAM(p_data, p_msg->company_id);
68 if (p_msg->vendor_len && p_msg->p_vendor_data)
69 memcpy(p_data, p_msg->p_vendor_data, p_msg->vendor_len);
70 p_cmd->len = (uint16_t)(p_data + p_msg->vendor_len - (uint8_t*)(p_cmd + 1) -
71 p_cmd->offset);
72 p_cmd->layer_specific = AVCT_DATA_CTRL;
73
74 return p_cmd;
75 }
76
77 /******************************************************************************
78 *
79 * Function AVRC_UnitCmd
80 *
81 * Description Send a UNIT INFO command to the peer device. This
82 * function can only be called for controller role connections.
83 * Any response message from the peer is passed back through
84 * the tAVRC_MSG_CBACK callback function.
85 *
86 * Input Parameters:
87 * handle: Handle of this connection.
88 *
89 * label: Transaction label.
90 *
91 * Output Parameters:
92 * None.
93 *
94 * Returns AVRC_SUCCESS if successful.
95 * AVRC_BAD_HANDLE if handle is invalid.
96 *
97 *****************************************************************************/
AVRC_UnitCmd(uint8_t handle,uint8_t label)98 uint16_t AVRC_UnitCmd(uint8_t handle, uint8_t label) {
99 BT_HDR* p_cmd = (BT_HDR*)osi_malloc(AVRC_CMD_BUF_SIZE);
100 uint8_t* p_data;
101
102 p_cmd->offset = AVCT_MSG_OFFSET;
103 p_data = (uint8_t*)(p_cmd + 1) + p_cmd->offset;
104 *p_data++ = AVRC_CMD_STATUS;
105 /* unit & id ignore */
106 *p_data++ = (AVRC_SUB_UNIT << AVRC_SUBTYPE_SHIFT) | AVRC_SUBID_IGNORE;
107 *p_data++ = AVRC_OP_UNIT_INFO;
108 memset(p_data, AVRC_CMD_OPRND_PAD, AVRC_UNIT_OPRND_BYTES);
109 p_cmd->len =
110 p_data + AVRC_UNIT_OPRND_BYTES - (uint8_t*)(p_cmd + 1) - p_cmd->offset;
111 p_cmd->layer_specific = AVCT_DATA_CTRL;
112
113 return AVCT_MsgReq(handle, label, AVCT_CMD, p_cmd);
114 }
115
116 /******************************************************************************
117 *
118 * Function AVRC_SubCmd
119 *
120 * Description Send a SUBUNIT INFO command to the peer device. This
121 * function can only be called for controller role connections.
122 * Any response message from the peer is passed back through
123 * the tAVRC_MSG_CBACK callback function.
124 *
125 * Input Parameters:
126 * handle: Handle of this connection.
127 *
128 * label: Transaction label.
129 *
130 * page: Specifies which part of the subunit type table
131 * is requested. For AVRCP it is typically zero.
132 * Value range is 0-7.
133 *
134 * Output Parameters:
135 * None.
136 *
137 * Returns AVRC_SUCCESS if successful.
138 * AVRC_BAD_HANDLE if handle is invalid.
139 *
140 *****************************************************************************/
AVRC_SubCmd(uint8_t handle,uint8_t label,uint8_t page)141 uint16_t AVRC_SubCmd(uint8_t handle, uint8_t label, uint8_t page) {
142 BT_HDR* p_cmd = (BT_HDR*)osi_malloc(AVRC_CMD_BUF_SIZE);
143 uint8_t* p_data;
144
145 p_cmd->offset = AVCT_MSG_OFFSET;
146 p_data = (uint8_t*)(p_cmd + 1) + p_cmd->offset;
147 *p_data++ = AVRC_CMD_STATUS;
148 /* unit & id ignore */
149 *p_data++ = (AVRC_SUB_UNIT << AVRC_SUBTYPE_SHIFT) | AVRC_SUBID_IGNORE;
150 *p_data++ = AVRC_OP_SUB_INFO;
151 *p_data++ =
152 ((page & AVRC_SUB_PAGE_MASK) << AVRC_SUB_PAGE_SHIFT) | AVRC_SUB_EXT_CODE;
153 memset(p_data, AVRC_CMD_OPRND_PAD, AVRC_SUB_OPRND_BYTES);
154 p_cmd->len =
155 p_data + AVRC_SUB_OPRND_BYTES - (uint8_t*)(p_cmd + 1) - p_cmd->offset;
156 p_cmd->layer_specific = AVCT_DATA_CTRL;
157
158 return AVCT_MsgReq(handle, label, AVCT_CMD, p_cmd);
159 }
160
161 /******************************************************************************
162 *
163 * Function AVRC_VendorCmd
164 *
165 * Description Send a VENDOR DEPENDENT command to the peer device. This
166 * function can only be called for controller role connections.
167 * Any response message from the peer is passed back through
168 * the tAVRC_MSG_CBACK callback function.
169 *
170 * Input Parameters:
171 * handle: Handle of this connection.
172 *
173 * label: Transaction label.
174 *
175 * p_msg: Pointer to VENDOR DEPENDENT message structure.
176 *
177 * Output Parameters:
178 * None.
179 *
180 * Returns AVRC_SUCCESS if successful.
181 * AVRC_BAD_HANDLE if handle is invalid.
182 *
183 *****************************************************************************/
AVRC_VendorCmd(uint8_t handle,uint8_t label,tAVRC_MSG_VENDOR * p_msg)184 uint16_t AVRC_VendorCmd(uint8_t handle, uint8_t label,
185 tAVRC_MSG_VENDOR* p_msg) {
186 BT_HDR* p_buf = avrc_vendor_msg(p_msg);
187 if (p_buf)
188 return AVCT_MsgReq(handle, label, AVCT_CMD, p_buf);
189 else
190 return AVCT_NO_RESOURCES;
191 }
192
193 /******************************************************************************
194 *
195 * Function AVRC_VendorRsp
196 *
197 * Description Send a VENDOR DEPENDENT response to the peer device. This
198 * function can only be called for target role connections.
199 * This function must be called when a VENDOR DEPENDENT
200 * command message is received from the peer through the
201 * tAVRC_MSG_CBACK callback function.
202 *
203 * Input Parameters:
204 * handle: Handle of this connection.
205 *
206 * label: Transaction label. Must be the same value as
207 * passed with the command message in the callback
208 * function.
209 *
210 * p_msg: Pointer to VENDOR DEPENDENT message structure.
211 *
212 * Output Parameters:
213 * None.
214 *
215 * Returns AVRC_SUCCESS if successful.
216 * AVRC_BAD_HANDLE if handle is invalid.
217 *
218 *****************************************************************************/
AVRC_VendorRsp(uint8_t handle,uint8_t label,tAVRC_MSG_VENDOR * p_msg)219 uint16_t AVRC_VendorRsp(uint8_t handle, uint8_t label,
220 tAVRC_MSG_VENDOR* p_msg) {
221 BT_HDR* p_buf = avrc_vendor_msg(p_msg);
222 if (p_buf)
223 return AVCT_MsgReq(handle, label, AVCT_RSP, p_buf);
224 else
225 return AVCT_NO_RESOURCES;
226 }
227