/******************************************************************************
*
* Copyright (C) 2002-2012 Broadcom Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************/
/******************************************************************************
*
* ommon API for the Advanced Audio Distribution Profile (A2DP)
*
******************************************************************************/
#include <string.h>
#include "bt_target.h"
#include "sdpdefs.h"
#include "a2d_api.h"
#include "a2d_int.h"
#include "avdt_api.h"
/*****************************************************************************
** Global data
*****************************************************************************/
#if A2D_DYNAMIC_MEMORY == FALSE
tA2D_CB a2d_cb;
#endif
/******************************************************************************
**
** Function a2d_sdp_cback
**
** Description This is the SDP callback function used by A2D_FindService.
** This function will be executed by SDP when the service
** search is completed. If the search is successful, it
** finds the first record in the database that matches the
** UUID of the search. Then retrieves various parameters
** from the record. When it is finished it calls the
** application callback function.
**
** Returns Nothing.
**
******************************************************************************/
static void a2d_sdp_cback(UINT16 status)
{
tSDP_DISC_REC *p_rec = NULL;
tSDP_DISC_ATTR *p_attr;
BOOLEAN found = FALSE;
tA2D_Service a2d_svc;
tSDP_PROTOCOL_ELEM elem;
A2D_TRACE_API("a2d_sdp_cback status: %d", status);
if (status == SDP_SUCCESS)
{
/* loop through all records we found */
do
{
/* get next record; if none found, we're done */
if ((p_rec = SDP_FindServiceInDb(a2d_cb.find.p_db,
a2d_cb.find.service_uuid, p_rec)) == NULL)
{
break;
}
memset(&a2d_svc, 0, sizeof(tA2D_Service));
/* get service name */
if ((p_attr = SDP_FindAttributeInRec(p_rec,
ATTR_ID_SERVICE_NAME)) != NULL)
{
a2d_svc.p_service_name = (char *) p_attr->attr_value.v.array;
a2d_svc.service_len = SDP_DISC_ATTR_LEN(p_attr->attr_len_type);
}
/* get provider name */
if ((p_attr = SDP_FindAttributeInRec(p_rec,
ATTR_ID_PROVIDER_NAME)) != NULL)
{
a2d_svc.p_provider_name = (char *) p_attr->attr_value.v.array;
a2d_svc.provider_len = SDP_DISC_ATTR_LEN(p_attr->attr_len_type);
}
/* get supported features */
if ((p_attr = SDP_FindAttributeInRec(p_rec,
ATTR_ID_SUPPORTED_FEATURES)) != NULL)
{
a2d_svc.features = p_attr->attr_value.v.u16;
}
/* get AVDTP version */
if (SDP_FindProtocolListElemInRec(p_rec, UUID_PROTOCOL_AVDTP, &elem))
{
a2d_svc.avdt_version = elem.params[0];
A2D_TRACE_DEBUG("avdt_version: 0x%x", a2d_svc.avdt_version);
}
/* we've got everything, we're done */
found = TRUE;
break;
} while (TRUE);
}
a2d_cb.find.service_uuid = 0;
/* return info from sdp record in app callback function */
if (a2d_cb.find.p_cback != NULL)
{
(*a2d_cb.find.p_cback)(found, &a2d_svc);
}
return;
}
/*******************************************************************************
**
** Function a2d_set_avdt_sdp_ver
**
** Description This function allows the script wrapper to change the
** avdt version of a2dp.
**
** Returns None
**
*******************************************************************************/
void a2d_set_avdt_sdp_ver (UINT16 avdt_sdp_ver)
{
a2d_cb.avdt_sdp_ver = avdt_sdp_ver;
}
/******************************************************************************
**
** Function A2D_AddRecord
**
** Description This function is called by a server application to add
** SRC or SNK information to an SDP record. Prior to
** calling this function the application must call
** SDP_CreateRecord() to create an SDP record.
**
** Input Parameters:
** service_uuid: Indicates SRC or SNK.
**
** p_service_name: Pointer to a null-terminated character
** string containing the service name.
**
** p_provider_name: Pointer to a null-terminated character
** string containing the provider name.
**
** features: Profile supported features.
**
** sdp_handle: SDP handle returned by SDP_CreateRecord().
**
** Output Parameters:
** None.
**
** Returns A2D_SUCCESS if function execution succeeded,
** A2D_INVALID_PARAMS if bad parameters are given.
** A2D_FAIL if function execution failed.
**
******************************************************************************/
tA2D_STATUS A2D_AddRecord(UINT16 service_uuid, char *p_service_name, char *p_provider_name,
UINT16 features, UINT32 sdp_handle)
{
UINT16 browse_list[1];
BOOLEAN result = TRUE;
UINT8 temp[8];
UINT8 *p;
tSDP_PROTOCOL_ELEM proto_list [A2D_NUM_PROTO_ELEMS];
A2D_TRACE_API("A2D_AddRecord uuid: %x", service_uuid);
if( (sdp_handle == 0) ||
(service_uuid != UUID_SERVCLASS_AUDIO_SOURCE && service_uuid != UUID_SERVCLASS_AUDIO_SINK) )
return A2D_INVALID_PARAMS;
/* add service class id list */
result &= SDP_AddServiceClassIdList(sdp_handle, 1, &service_uuid);
memset((void*) proto_list, 0 , A2D_NUM_PROTO_ELEMS*sizeof(tSDP_PROTOCOL_ELEM));
/* add protocol descriptor list */
proto_list[0].protocol_uuid = UUID_PROTOCOL_L2CAP;
proto_list[0].num_params = 1;
proto_list[0].params[0] = AVDT_PSM;
proto_list[1].protocol_uuid = UUID_PROTOCOL_AVDTP;
proto_list[1].num_params = 1;
proto_list[1].params[0] = a2d_cb.avdt_sdp_ver;
result &= SDP_AddProtocolList(sdp_handle, A2D_NUM_PROTO_ELEMS, proto_list);
/* add profile descriptor list */
result &= SDP_AddProfileDescriptorList(sdp_handle, UUID_SERVCLASS_ADV_AUDIO_DISTRIBUTION, A2D_VERSION);
/* add supported feature */
if (features != 0)
{
p = temp;
UINT16_TO_BE_STREAM(p, features);
result &= SDP_AddAttribute(sdp_handle, ATTR_ID_SUPPORTED_FEATURES, UINT_DESC_TYPE,
(UINT32)2, (UINT8*)temp);
}
/* add provider name */
if (p_provider_name != NULL)
{
result &= SDP_AddAttribute(sdp_handle, ATTR_ID_PROVIDER_NAME, TEXT_STR_DESC_TYPE,
(UINT32)(strlen(p_provider_name)+1), (UINT8 *) p_provider_name);
}
/* add service name */
if (p_service_name != NULL)
{
result &= SDP_AddAttribute(sdp_handle, ATTR_ID_SERVICE_NAME, TEXT_STR_DESC_TYPE,
(UINT32)(strlen(p_service_name)+1), (UINT8 *) p_service_name);
}
/* add browse group list */
browse_list[0] = UUID_SERVCLASS_PUBLIC_BROWSE_GROUP;
result &= SDP_AddUuidSequence(sdp_handle, ATTR_ID_BROWSE_GROUP_LIST, 1, browse_list);
return (result ? A2D_SUCCESS : A2D_FAIL);
}
/******************************************************************************
**
** Function A2D_FindService
**
** Description This function is called by a client application to
** perform service discovery and retrieve SRC or SNK SDP
** record information from a server. Information is
** returned for the first service record found on the
** server that matches the service UUID. The callback
** function will be executed when service discovery is
** complete. There can only be one outstanding call to
** A2D_FindService() at a time; the application must wait
** for the callback before it makes another call to
** the function.
**
** Input Parameters:
** service_uuid: Indicates SRC or SNK.
**
** bd_addr: BD address of the peer device.
**
** p_db: Pointer to the information to initialize
** the discovery database.
**
** p_cback: Pointer to the A2D_FindService()
** callback function.
**
** Output Parameters:
** None.
**
** Returns A2D_SUCCESS if function execution succeeded,
** A2D_INVALID_PARAMS if bad parameters are given.
** A2D_BUSY if discovery is already in progress.
** A2D_FAIL if function execution failed.
**
******************************************************************************/
tA2D_STATUS A2D_FindService(UINT16 service_uuid, BD_ADDR bd_addr,
tA2D_SDP_DB_PARAMS *p_db, tA2D_FIND_CBACK *p_cback)
{
tSDP_UUID uuid_list;
BOOLEAN result = TRUE;
UINT16 a2d_attr_list[] = {ATTR_ID_SERVICE_CLASS_ID_LIST, /* update A2D_NUM_ATTR, if changed */
ATTR_ID_BT_PROFILE_DESC_LIST,
ATTR_ID_SUPPORTED_FEATURES,
ATTR_ID_SERVICE_NAME,
ATTR_ID_PROTOCOL_DESC_LIST,
ATTR_ID_PROVIDER_NAME};
A2D_TRACE_API("A2D_FindService uuid: %x", service_uuid);
if( (service_uuid != UUID_SERVCLASS_AUDIO_SOURCE && service_uuid != UUID_SERVCLASS_AUDIO_SINK) ||
p_db == NULL || p_db->p_db == NULL || p_cback == NULL)
return A2D_INVALID_PARAMS;
if( a2d_cb.find.service_uuid == UUID_SERVCLASS_AUDIO_SOURCE ||
a2d_cb.find.service_uuid == UUID_SERVCLASS_AUDIO_SINK)
return A2D_BUSY;
/* set up discovery database */
uuid_list.len = LEN_UUID_16;
uuid_list.uu.uuid16 = service_uuid;
if(p_db->p_attrs == NULL || p_db->num_attr == 0)
{
p_db->p_attrs = a2d_attr_list;
p_db->num_attr = A2D_NUM_ATTR;
}
result = SDP_InitDiscoveryDb(p_db->p_db, p_db->db_len, 1, &uuid_list, p_db->num_attr,
p_db->p_attrs);
if (result == TRUE)
{
/* store service_uuid and discovery db pointer */
a2d_cb.find.p_db = p_db->p_db;
a2d_cb.find.service_uuid = service_uuid;
a2d_cb.find.p_cback = p_cback;
/* perform service search */
result = SDP_ServiceSearchAttributeRequest(bd_addr, p_db->p_db, a2d_sdp_cback);
if(FALSE == result)
{
a2d_cb.find.service_uuid = 0;
}
}
return (result ? A2D_SUCCESS : A2D_FAIL);
}
/******************************************************************************
**
** Function A2D_SetTraceLevel
**
** Description Sets the trace level for A2D. If 0xff is passed, the
** current trace level is returned.
**
** Input Parameters:
** new_level: The level to set the A2D tracing to:
** 0xff-returns the current setting.
** 0-turns off tracing.
** >= 1-Errors.
** >= 2-Warnings.
** >= 3-APIs.
** >= 4-Events.
** >= 5-Debug.
**
** Returns The new trace level or current trace level if
** the input parameter is 0xff.
**
******************************************************************************/
UINT8 A2D_SetTraceLevel (UINT8 new_level)
{
if (new_level != 0xFF)
a2d_cb.trace_level = new_level;
return (a2d_cb.trace_level);
}
/******************************************************************************
** Function A2D_BitsSet
**
** Description Check the given num for the number of bits set
** Returns A2D_SET_ONE_BIT, if one and only one bit is set
** A2D_SET_ZERO_BIT, if all bits clear
** A2D_SET_MULTL_BIT, if multiple bits are set
******************************************************************************/
UINT8 A2D_BitsSet(UINT8 num)
{
UINT8 count;
BOOLEAN res;
if(num == 0)
res = A2D_SET_ZERO_BIT;
else
{
count = (num & (num - 1));
res = ((count==0)?A2D_SET_ONE_BIT:A2D_SET_MULTL_BIT);
}
return res;
}
/*******************************************************************************
**
** Function A2D_Init
**
** Description This function is called to initialize the control block
** for this layer. It must be called before accessing any
** other API functions for this layer. It is typically called
** once during the start up of the stack.
**
** Returns void
**
*******************************************************************************/
void A2D_Init(void)
{
memset(&a2d_cb, 0, sizeof(tA2D_CB));
a2d_cb.avdt_sdp_ver = AVDT_VERSION;
#if defined(A2D_INITIAL_TRACE_LEVEL)
a2d_cb.trace_level = A2D_INITIAL_TRACE_LEVEL;
#else
a2d_cb.trace_level = BT_TRACE_LEVEL_NONE;
#endif
}