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 *  Common API for the Advanced Audio Distribution Profile (A2DP)
22 *
23 ******************************************************************************/
24
25#define LOG_TAG "a2dp_api"
26
27#include "a2dp_api.h"
28
29#include <string.h>
30
31#include "a2dp_int.h"
32#include "avdt_api.h"
33#include "bt_common.h"
34#include "bt_target.h"
35#include "osi/include/log.h"
36#include "sdpdefs.h"
37
38/*****************************************************************************
39 *  Global data
40 ****************************************************************************/
41tA2DP_CB a2dp_cb;
42static uint16_t a2dp_attr_list[] = {
43    ATTR_ID_SERVICE_CLASS_ID_LIST, /* update A2DP_NUM_ATTR, if changed */
44    ATTR_ID_BT_PROFILE_DESC_LIST,  ATTR_ID_SUPPORTED_FEATURES,
45    ATTR_ID_SERVICE_NAME,          ATTR_ID_PROTOCOL_DESC_LIST,
46    ATTR_ID_PROVIDER_NAME};
47
48/******************************************************************************
49 *
50 * Function         a2dp_sdp_cback
51 *
52 * Description      This is the SDP callback function used by A2DP_FindService.
53 *                  This function will be executed by SDP when the service
54 *                  search is completed.  If the search is successful, it
55 *                  finds the first record in the database that matches the
56 *                  UUID of the search.  Then retrieves various parameters
57 *                  from the record.  When it is finished it calls the
58 *                  application callback function.
59 *
60 * Returns          Nothing.
61 *
62 *****************************************************************************/
63static void a2dp_sdp_cback(uint16_t status) {
64  tSDP_DISC_REC* p_rec = NULL;
65  tSDP_DISC_ATTR* p_attr;
66  bool found = false;
67  tA2DP_Service a2dp_svc;
68  tSDP_PROTOCOL_ELEM elem;
69
70  LOG_VERBOSE(LOG_TAG, "%s: status: %d", __func__, status);
71
72  if (status == SDP_SUCCESS) {
73    /* loop through all records we found */
74    do {
75      /* get next record; if none found, we're done */
76      if ((p_rec = SDP_FindServiceInDb(
77               a2dp_cb.find.p_db, a2dp_cb.find.service_uuid, p_rec)) == NULL) {
78        break;
79      }
80      memset(&a2dp_svc, 0, sizeof(tA2DP_Service));
81
82      /* get service name */
83      if ((p_attr = SDP_FindAttributeInRec(p_rec, ATTR_ID_SERVICE_NAME)) !=
84          NULL) {
85        a2dp_svc.p_service_name = (char*)p_attr->attr_value.v.array;
86        a2dp_svc.service_len = SDP_DISC_ATTR_LEN(p_attr->attr_len_type);
87      }
88
89      /* get provider name */
90      if ((p_attr = SDP_FindAttributeInRec(p_rec, ATTR_ID_PROVIDER_NAME)) !=
91          NULL) {
92        a2dp_svc.p_provider_name = (char*)p_attr->attr_value.v.array;
93        a2dp_svc.provider_len = SDP_DISC_ATTR_LEN(p_attr->attr_len_type);
94      }
95
96      /* get supported features */
97      if ((p_attr = SDP_FindAttributeInRec(
98               p_rec, ATTR_ID_SUPPORTED_FEATURES)) != NULL) {
99        a2dp_svc.features = p_attr->attr_value.v.u16;
100      }
101
102      /* get AVDTP version */
103      if (SDP_FindProtocolListElemInRec(p_rec, UUID_PROTOCOL_AVDTP, &elem)) {
104        a2dp_svc.avdt_version = elem.params[0];
105        LOG_VERBOSE(LOG_TAG, "avdt_version: 0x%x", a2dp_svc.avdt_version);
106      }
107
108      /* we've got everything, we're done */
109      found = true;
110      break;
111
112    } while (true);
113  }
114
115  a2dp_cb.find.service_uuid = 0;
116  osi_free_and_reset((void**)&a2dp_cb.find.p_db);
117  /* return info from sdp record in app callback function */
118  if (a2dp_cb.find.p_cback != NULL) {
119    (*a2dp_cb.find.p_cback)(found, &a2dp_svc);
120  }
121
122  return;
123}
124
125/*******************************************************************************
126 *
127 * Function         a2dp_set_avdt_sdp_ver
128 *
129 * Description      This function allows the script wrapper to change the
130 *                  avdt version of a2dp.
131 *
132 * Returns          None
133 *
134 ******************************************************************************/
135void a2dp_set_avdt_sdp_ver(uint16_t avdt_sdp_ver) {
136  a2dp_cb.avdt_sdp_ver = avdt_sdp_ver;
137}
138
139/******************************************************************************
140 *
141 * Function         A2DP_AddRecord
142 *
143 * Description      This function is called by a server application to add
144 *                  SRC or SNK information to an SDP record.  Prior to
145 *                  calling this function the application must call
146 *                  SDP_CreateRecord() to create an SDP record.
147 *
148 *                  Input Parameters:
149 *                      service_uuid:  Indicates SRC or SNK.
150 *
151 *                      p_service_name:  Pointer to a null-terminated character
152 *                      string containing the service name.
153 *
154 *                      p_provider_name:  Pointer to a null-terminated character
155 *                      string containing the provider name.
156 *
157 *                      features:  Profile supported features.
158 *
159 *                      sdp_handle:  SDP handle returned by SDP_CreateRecord().
160 *
161 *                  Output Parameters:
162 *                      None.
163 *
164 * Returns          A2DP_SUCCESS if function execution succeeded,
165 *                  A2DP_INVALID_PARAMS if bad parameters are given.
166 *                  A2DP_FAIL if function execution failed.
167 *
168 *****************************************************************************/
169tA2DP_STATUS A2DP_AddRecord(uint16_t service_uuid, char* p_service_name,
170                            char* p_provider_name, uint16_t features,
171                            uint32_t sdp_handle) {
172  uint16_t browse_list[1];
173  bool result = true;
174  uint8_t temp[8];
175  uint8_t* p;
176  tSDP_PROTOCOL_ELEM proto_list[A2DP_NUM_PROTO_ELEMS];
177
178  LOG_VERBOSE(LOG_TAG, "%s: uuid: 0x%x", __func__, service_uuid);
179
180  if ((sdp_handle == 0) || (service_uuid != UUID_SERVCLASS_AUDIO_SOURCE &&
181                            service_uuid != UUID_SERVCLASS_AUDIO_SINK))
182    return A2DP_INVALID_PARAMS;
183
184  /* add service class id list */
185  result &= SDP_AddServiceClassIdList(sdp_handle, 1, &service_uuid);
186
187  memset((void*)proto_list, 0,
188         A2DP_NUM_PROTO_ELEMS * sizeof(tSDP_PROTOCOL_ELEM));
189
190  /* add protocol descriptor list   */
191  proto_list[0].protocol_uuid = UUID_PROTOCOL_L2CAP;
192  proto_list[0].num_params = 1;
193  proto_list[0].params[0] = AVDT_PSM;
194  proto_list[1].protocol_uuid = UUID_PROTOCOL_AVDTP;
195  proto_list[1].num_params = 1;
196  proto_list[1].params[0] = a2dp_cb.avdt_sdp_ver;
197
198  result &= SDP_AddProtocolList(sdp_handle, A2DP_NUM_PROTO_ELEMS, proto_list);
199
200  /* add profile descriptor list   */
201  result &= SDP_AddProfileDescriptorList(
202      sdp_handle, UUID_SERVCLASS_ADV_AUDIO_DISTRIBUTION, A2DP_VERSION);
203
204  /* add supported feature */
205  if (features != 0) {
206    p = temp;
207    UINT16_TO_BE_STREAM(p, features);
208    result &= SDP_AddAttribute(sdp_handle, ATTR_ID_SUPPORTED_FEATURES,
209                               UINT_DESC_TYPE, (uint32_t)2, (uint8_t*)temp);
210  }
211
212  /* add provider name */
213  if (p_provider_name != NULL) {
214    result &= SDP_AddAttribute(
215        sdp_handle, ATTR_ID_PROVIDER_NAME, TEXT_STR_DESC_TYPE,
216        (uint32_t)(strlen(p_provider_name) + 1), (uint8_t*)p_provider_name);
217  }
218
219  /* add service name */
220  if (p_service_name != NULL) {
221    result &= SDP_AddAttribute(
222        sdp_handle, ATTR_ID_SERVICE_NAME, TEXT_STR_DESC_TYPE,
223        (uint32_t)(strlen(p_service_name) + 1), (uint8_t*)p_service_name);
224  }
225
226  /* add browse group list */
227  browse_list[0] = UUID_SERVCLASS_PUBLIC_BROWSE_GROUP;
228  result &= SDP_AddUuidSequence(sdp_handle, ATTR_ID_BROWSE_GROUP_LIST, 1,
229                                browse_list);
230
231  return (result ? A2DP_SUCCESS : A2DP_FAIL);
232}
233
234/******************************************************************************
235 *
236 * Function         A2DP_FindService
237 *
238 * Description      This function is called by a client application to
239 *                  perform service discovery and retrieve SRC or SNK SDP
240 *                  record information from a server.  Information is
241 *                  returned for the first service record found on the
242 *                  server that matches the service UUID.  The callback
243 *                  function will be executed when service discovery is
244 *                  complete.  There can only be one outstanding call to
245 *                  A2DP_FindService() at a time; the application must wait
246 *                  for the callback before it makes another call to
247 *                  the function.
248 *
249 *                  Input Parameters:
250 *                      service_uuid:  Indicates SRC or SNK.
251 *
252 *                      bd_addr:  BD address of the peer device.
253 *
254 *                      p_db:  Pointer to the information to initialize
255 *                             the discovery database.
256 *
257 *                      p_cback:  Pointer to the A2DP_FindService()
258 *                      callback function.
259 *
260 *                  Output Parameters:
261 *                      None.
262 *
263 * Returns          A2DP_SUCCESS if function execution succeeded,
264 *                  A2DP_INVALID_PARAMS if bad parameters are given.
265 *                  A2DP_BUSY if discovery is already in progress.
266 *                  A2DP_FAIL if function execution failed.
267 *
268 *****************************************************************************/
269tA2DP_STATUS A2DP_FindService(uint16_t service_uuid, const RawAddress& bd_addr,
270                              tA2DP_SDP_DB_PARAMS* p_db,
271                              tA2DP_FIND_CBACK* p_cback) {
272  tSDP_UUID uuid_list;
273  bool result = true;
274
275  LOG_VERBOSE(LOG_TAG, "%s: uuid: 0x%x", __func__, service_uuid);
276  if ((service_uuid != UUID_SERVCLASS_AUDIO_SOURCE &&
277       service_uuid != UUID_SERVCLASS_AUDIO_SINK) ||
278      p_db == NULL || p_cback == NULL)
279    return A2DP_INVALID_PARAMS;
280
281  if (a2dp_cb.find.service_uuid == UUID_SERVCLASS_AUDIO_SOURCE ||
282      a2dp_cb.find.service_uuid == UUID_SERVCLASS_AUDIO_SINK)
283    return A2DP_BUSY;
284
285  /* set up discovery database */
286  uuid_list.len = LEN_UUID_16;
287  uuid_list.uu.uuid16 = service_uuid;
288
289  if (p_db->p_attrs == NULL || p_db->num_attr == 0) {
290    p_db->p_attrs = a2dp_attr_list;
291    p_db->num_attr = A2DP_NUM_ATTR;
292  }
293
294  if (a2dp_cb.find.p_db == NULL)
295    a2dp_cb.find.p_db = (tSDP_DISCOVERY_DB*)osi_malloc(p_db->db_len);
296
297  result = SDP_InitDiscoveryDb(a2dp_cb.find.p_db, p_db->db_len, 1, &uuid_list,
298                               p_db->num_attr, p_db->p_attrs);
299
300  if (result == true) {
301    /* store service_uuid */
302    a2dp_cb.find.service_uuid = service_uuid;
303    a2dp_cb.find.p_cback = p_cback;
304
305    /* perform service search */
306    result = SDP_ServiceSearchAttributeRequest(bd_addr, a2dp_cb.find.p_db,
307                                               a2dp_sdp_cback);
308    if (false == result) {
309      a2dp_cb.find.service_uuid = 0;
310    }
311  }
312
313  return (result ? A2DP_SUCCESS : A2DP_FAIL);
314}
315
316/******************************************************************************
317 *
318 * Function         A2DP_SetTraceLevel
319 *
320 * Description      Sets the trace level for A2D. If 0xff is passed, the
321 *                  current trace level is returned.
322 *
323 *                  Input Parameters:
324 *                      new_level:  The level to set the A2DP tracing to:
325 *                      0xff-returns the current setting.
326 *                      0-turns off tracing.
327 *                      >= 1-Errors.
328 *                      >= 2-Warnings.
329 *                      >= 3-APIs.
330 *                      >= 4-Events.
331 *                      >= 5-Debug.
332 *
333 * Returns          The new trace level or current trace level if
334 *                  the input parameter is 0xff.
335 *
336 *****************************************************************************/
337uint8_t A2DP_SetTraceLevel(uint8_t new_level) {
338  if (new_level != 0xFF) a2dp_cb.trace_level = new_level;
339
340  return (a2dp_cb.trace_level);
341}
342
343/******************************************************************************
344 * Function         A2DP_BitsSet
345 *
346 * Description      Check the given num for the number of bits set
347 * Returns          A2DP_SET_ONE_BIT, if one and only one bit is set
348 *                  A2DP_SET_ZERO_BIT, if all bits clear
349 *                  A2DP_SET_MULTL_BIT, if multiple bits are set
350 *****************************************************************************/
351uint8_t A2DP_BitsSet(uint64_t num) {
352  if (num == 0) return A2DP_SET_ZERO_BIT;
353  if ((num & (num - 1)) == 0) return A2DP_SET_ONE_BIT;
354  return A2DP_SET_MULTL_BIT;
355}
356
357/*******************************************************************************
358 *
359 * Function         A2DP_Init
360 *
361 * Description      This function is called to initialize the control block
362 *                  for this layer.  It must be called before accessing any
363 *                  other API functions for this layer.  It is typically called
364 *                  once during the start up of the stack.
365 *
366 * Returns          void
367 *
368 ******************************************************************************/
369void A2DP_Init(void) {
370  memset(&a2dp_cb, 0, sizeof(tA2DP_CB));
371
372  a2dp_cb.avdt_sdp_ver = AVDT_VERSION;
373
374#if defined(A2DP_INITIAL_TRACE_LEVEL)
375  a2dp_cb.trace_level = A2DP_INITIAL_TRACE_LEVEL;
376#else
377  a2dp_cb.trace_level = BT_TRACE_LEVEL_NONE;
378#endif
379}
380
381uint16_t A2DP_GetAvdtpVersion() { return a2dp_cb.avdt_sdp_ver; }
382