/******************************************************************************
*
* Copyright (C) 2003-2016 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.
*
******************************************************************************/
/******************************************************************************
*
* AVRCP SDP related functions
*
******************************************************************************/
#include <string.h>
#include "avrc_api.h"
#include "avrc_int.h"
#include "bt_common.h"
/*****************************************************************************
* Global data
****************************************************************************/
tAVRC_CB avrc_cb;
/******************************************************************************
*
* Function avrc_sdp_cback
*
* Description This is the SDP callback function used by A2DP_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 avrc_sdp_cback(uint16_t status) {
AVRC_TRACE_API("%s status: %d", __func__, status);
/* reset service_uuid, so can start another find service */
avrc_cb.service_uuid = 0;
/* return info from sdp record in app callback function */
(*avrc_cb.p_cback)(status);
return;
}
/******************************************************************************
*
* Function AVRC_FindService
*
* Description This function is called by the application to perform
* service discovery and retrieve AVRCP SDP record information
* from a peer device. 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 AVRC_FindService() at a time; the application must
* wait for the callback before it makes another call to the
* function. The application is responsible for allocating
* memory for the discovery database. It is recommended that
* the size of the discovery database be at least 300 bytes.
* The application can deallocate the memory after the
* callback function has executed.
*
* Input Parameters:
* service_uuid: Indicates
* TG(UUID_SERVCLASS_AV_REM_CTRL_TARGET)
* r CT(UUID_SERVCLASS_AV_REMOTE_CONTROL)
*
* bd_addr: BD address of the peer device.
*
* p_db: SDP discovery database parameters.
*
* p_cback: Pointer to the callback function.
*
* Output Parameters:
* None.
*
* Returns AVRC_SUCCESS if successful.
* AVRC_BAD_PARAMS if discovery database parameters are
* invalid.
* AVRC_NO_RESOURCES if there are not enough resources to
* perform the service search.
*
*****************************************************************************/
uint16_t AVRC_FindService(uint16_t service_uuid, BD_ADDR bd_addr,
tAVRC_SDP_DB_PARAMS* p_db,
tAVRC_FIND_CBACK* p_cback) {
tSDP_UUID uuid_list;
bool result = true;
uint16_t a2dp_attr_list[] = {
ATTR_ID_SERVICE_CLASS_ID_LIST, /* update AVRC_NUM_ATTR, if changed */
ATTR_ID_PROTOCOL_DESC_LIST, ATTR_ID_BT_PROFILE_DESC_LIST,
ATTR_ID_SERVICE_NAME, ATTR_ID_SUPPORTED_FEATURES,
ATTR_ID_PROVIDER_NAME};
AVRC_TRACE_API("%s uuid: %x", __func__, service_uuid);
if ((service_uuid != UUID_SERVCLASS_AV_REM_CTRL_TARGET &&
service_uuid != UUID_SERVCLASS_AV_REMOTE_CONTROL) ||
p_db == NULL || p_db->p_db == NULL || p_cback == NULL)
return AVRC_BAD_PARAM;
/* check if it is busy */
if (avrc_cb.service_uuid == UUID_SERVCLASS_AV_REM_CTRL_TARGET ||
avrc_cb.service_uuid == UUID_SERVCLASS_AV_REMOTE_CONTROL)
return AVRC_NO_RESOURCES;
/* 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 = a2dp_attr_list;
p_db->num_attr = AVRC_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 */
avrc_cb.p_db = p_db->p_db;
avrc_cb.service_uuid = service_uuid;
avrc_cb.p_cback = p_cback;
/* perform service search */
result =
SDP_ServiceSearchAttributeRequest(bd_addr, p_db->p_db, avrc_sdp_cback);
}
return (result ? AVRC_SUCCESS : AVRC_FAIL);
}
/******************************************************************************
*
* Function AVRC_AddRecord
*
* Description This function is called to build an AVRCP SDP record.
* Prior to calling this function the application must
* call SDP_CreateRecord() to create an SDP record.
*
* Input Parameters:
* service_uuid: Indicates
* TG(UUID_SERVCLASS_AV_REM_CTRL_TARGET)
* or CT(UUID_SERVCLASS_AV_REMOTE_CONTROL)
*
* p_service_name: Pointer to a null-terminated character
* string containing the service name.
* If service name is not used set this to NULL.
*
* p_provider_name: Pointer to a null-terminated character
* string containing the provider name.
* If provider name is not used set this to NULL.
*
* categories: Supported categories.
*
* sdp_handle: SDP handle returned by SDP_CreateRecord().
*
* browse_supported: browse support info.
*
* profile_version: profile version of avrcp record.
*
* Output Parameters:
* None.
*
* Returns AVRC_SUCCESS if successful.
* AVRC_NO_RESOURCES if not enough resources to build the SDP
* record.
*
*****************************************************************************/
uint16_t AVRC_AddRecord(uint16_t service_uuid, const char* p_service_name,
const char* p_provider_name, uint16_t categories,
uint32_t sdp_handle, bool browse_supported,
uint16_t profile_version) {
uint16_t browse_list[1];
bool result = true;
uint8_t temp[8];
uint8_t* p;
uint16_t count = 1;
uint8_t index = 0;
uint16_t class_list[2];
AVRC_TRACE_API("%s uuid: %x", __func__, service_uuid);
if (service_uuid != UUID_SERVCLASS_AV_REM_CTRL_TARGET &&
service_uuid != UUID_SERVCLASS_AV_REMOTE_CONTROL)
return AVRC_BAD_PARAM;
/* add service class id list */
class_list[0] = service_uuid;
if ((service_uuid == UUID_SERVCLASS_AV_REMOTE_CONTROL) &&
(profile_version > AVRC_REV_1_3)) {
class_list[1] = UUID_SERVCLASS_AV_REM_CTRL_CONTROL;
count = 2;
}
result &= SDP_AddServiceClassIdList(sdp_handle, count, class_list);
/* add protocol descriptor list */
tSDP_PROTOCOL_ELEM avrc_proto_desc_list[AVRC_NUM_PROTO_ELEMS];
avrc_proto_desc_list[0].num_params = 1;
avrc_proto_desc_list[0].protocol_uuid = UUID_PROTOCOL_L2CAP;
avrc_proto_desc_list[0].params[0] = AVCT_PSM;
avrc_proto_desc_list[0].params[1] = 0;
for (index = 1; index < AVRC_NUM_PROTO_ELEMS; index++) {
avrc_proto_desc_list[index].num_params = 1;
avrc_proto_desc_list[index].protocol_uuid = UUID_PROTOCOL_AVCTP;
avrc_proto_desc_list[index].params[0] = AVCT_REV_1_4;
avrc_proto_desc_list[index].params[1] = 0;
}
result &= SDP_AddProtocolList(sdp_handle, AVRC_NUM_PROTO_ELEMS,
(tSDP_PROTOCOL_ELEM*)avrc_proto_desc_list);
/* additional protocal descriptor, required only for version > 1.3 */
if ((profile_version > AVRC_REV_1_3) && (browse_supported)) {
tSDP_PROTO_LIST_ELEM avrc_add_proto_desc_list;
avrc_add_proto_desc_list.num_elems = 2;
avrc_add_proto_desc_list.list_elem[0].num_params = 1;
avrc_add_proto_desc_list.list_elem[0].protocol_uuid = UUID_PROTOCOL_L2CAP;
avrc_add_proto_desc_list.list_elem[0].params[0] = AVCT_BR_PSM;
avrc_add_proto_desc_list.list_elem[0].params[1] = 0;
avrc_add_proto_desc_list.list_elem[1].num_params = 1;
avrc_add_proto_desc_list.list_elem[1].protocol_uuid = UUID_PROTOCOL_AVCTP;
avrc_add_proto_desc_list.list_elem[1].params[0] = AVCT_REV_1_4;
avrc_add_proto_desc_list.list_elem[1].params[1] = 0;
result &= SDP_AddAdditionProtoLists(
sdp_handle, 1, (tSDP_PROTO_LIST_ELEM*)&avrc_add_proto_desc_list);
}
/* add profile descriptor list */
result &= SDP_AddProfileDescriptorList(
sdp_handle, UUID_SERVCLASS_AV_REMOTE_CONTROL, profile_version);
/* add supported categories */
p = temp;
UINT16_TO_BE_STREAM(p, categories);
result &= SDP_AddAttribute(sdp_handle, ATTR_ID_SUPPORTED_FEATURES,
UINT_DESC_TYPE, (uint32_t)2, (uint8_t*)temp);
/* add provider name */
if (p_provider_name != NULL) {
result &= SDP_AddAttribute(
sdp_handle, ATTR_ID_PROVIDER_NAME, TEXT_STR_DESC_TYPE,
(uint32_t)(strlen(p_provider_name) + 1), (uint8_t*)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_t)(strlen(p_service_name) + 1), (uint8_t*)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 ? AVRC_SUCCESS : AVRC_FAIL);
}
/******************************************************************************
*
* Function AVRC_SetTraceLevel
*
* Description Sets the trace level for AVRC. If 0xff is passed, the
* current trace level is returned.
*
* Input Parameters:
* new_level: The level to set the AVRC 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_t AVRC_SetTraceLevel(uint8_t new_level) {
if (new_level != 0xFF) avrc_cb.trace_level = new_level;
return (avrc_cb.trace_level);
}
/*******************************************************************************
*
* Function AVRC_Init
*
* Description This function is called at stack startup to allocate the
* control block (if using dynamic memory), and initializes the
* control block and tracing level.
*
* Returns void
*
******************************************************************************/
void AVRC_Init(void) {
memset(&avrc_cb, 0, sizeof(tAVRC_CB));
#if defined(AVRC_INITIAL_TRACE_LEVEL)
avrc_cb.trace_level = AVRC_INITIAL_TRACE_LEVEL;
#else
avrc_cb.trace_level = BT_TRACE_LEVEL_NONE;
#endif
}