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August 2018-08-08 17:48:24 +08:00
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android/system/bt/stack/a2dp/a2dp_api.cc Normal file
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/******************************************************************************
*
* 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.
*
******************************************************************************/
/******************************************************************************
*
* Common API for the Advanced Audio Distribution Profile (A2DP)
*
******************************************************************************/
#define LOG_TAG "a2dp_api"
#include "a2dp_api.h"
#include <string.h>
#include "a2dp_int.h"
#include "avdt_api.h"
#include "bt_common.h"
#include "bt_target.h"
#include "osi/include/log.h"
#include "sdpdefs.h"
/*****************************************************************************
* Global data
****************************************************************************/
tA2DP_CB a2dp_cb;
static uint16_t a2dp_attr_list[] = {
ATTR_ID_SERVICE_CLASS_ID_LIST, /* update A2DP_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};
/******************************************************************************
*
* Function a2dp_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 a2dp_sdp_cback(uint16_t status) {
tSDP_DISC_REC* p_rec = NULL;
tSDP_DISC_ATTR* p_attr;
bool found = false;
tA2DP_Service a2dp_svc;
tSDP_PROTOCOL_ELEM elem;
LOG_VERBOSE(LOG_TAG, "%s: status: %d", __func__, 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(
a2dp_cb.find.p_db, a2dp_cb.find.service_uuid, p_rec)) == NULL) {
break;
}
memset(&a2dp_svc, 0, sizeof(tA2DP_Service));
/* get service name */
if ((p_attr = SDP_FindAttributeInRec(p_rec, ATTR_ID_SERVICE_NAME)) !=
NULL) {
a2dp_svc.p_service_name = (char*)p_attr->attr_value.v.array;
a2dp_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) {
a2dp_svc.p_provider_name = (char*)p_attr->attr_value.v.array;
a2dp_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) {
a2dp_svc.features = p_attr->attr_value.v.u16;
}
/* get AVDTP version */
if (SDP_FindProtocolListElemInRec(p_rec, UUID_PROTOCOL_AVDTP, &elem)) {
a2dp_svc.avdt_version = elem.params[0];
LOG_VERBOSE(LOG_TAG, "avdt_version: 0x%x", a2dp_svc.avdt_version);
}
/* we've got everything, we're done */
found = true;
break;
} while (true);
}
a2dp_cb.find.service_uuid = 0;
osi_free_and_reset((void**)&a2dp_cb.find.p_db);
/* return info from sdp record in app callback function */
if (a2dp_cb.find.p_cback != NULL) {
(*a2dp_cb.find.p_cback)(found, &a2dp_svc);
}
return;
}
/*******************************************************************************
*
* Function a2dp_set_avdt_sdp_ver
*
* Description This function allows the script wrapper to change the
* avdt version of a2dp.
*
* Returns None
*
******************************************************************************/
void a2dp_set_avdt_sdp_ver(uint16_t avdt_sdp_ver) {
a2dp_cb.avdt_sdp_ver = avdt_sdp_ver;
}
/******************************************************************************
*
* Function A2DP_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 A2DP_SUCCESS if function execution succeeded,
* A2DP_INVALID_PARAMS if bad parameters are given.
* A2DP_FAIL if function execution failed.
*
*****************************************************************************/
tA2DP_STATUS A2DP_AddRecord(uint16_t service_uuid, char* p_service_name,
char* p_provider_name, uint16_t features,
uint32_t sdp_handle) {
uint16_t browse_list[1];
bool result = true;
uint8_t temp[8];
uint8_t* p;
tSDP_PROTOCOL_ELEM proto_list[A2DP_NUM_PROTO_ELEMS];
LOG_VERBOSE(LOG_TAG, "%s: uuid: 0x%x", __func__, service_uuid);
if ((sdp_handle == 0) || (service_uuid != UUID_SERVCLASS_AUDIO_SOURCE &&
service_uuid != UUID_SERVCLASS_AUDIO_SINK))
return A2DP_INVALID_PARAMS;
/* add service class id list */
result &= SDP_AddServiceClassIdList(sdp_handle, 1, &service_uuid);
memset((void*)proto_list, 0,
A2DP_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] = a2dp_cb.avdt_sdp_ver;
result &= SDP_AddProtocolList(sdp_handle, A2DP_NUM_PROTO_ELEMS, proto_list);
/* add profile descriptor list */
result &= SDP_AddProfileDescriptorList(
sdp_handle, UUID_SERVCLASS_ADV_AUDIO_DISTRIBUTION, A2DP_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_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 ? A2DP_SUCCESS : A2DP_FAIL);
}
/******************************************************************************
*
* Function A2DP_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
* A2DP_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 A2DP_FindService()
* callback function.
*
* Output Parameters:
* None.
*
* Returns A2DP_SUCCESS if function execution succeeded,
* A2DP_INVALID_PARAMS if bad parameters are given.
* A2DP_BUSY if discovery is already in progress.
* A2DP_FAIL if function execution failed.
*
*****************************************************************************/
tA2DP_STATUS A2DP_FindService(uint16_t service_uuid, const RawAddress& bd_addr,
tA2DP_SDP_DB_PARAMS* p_db,
tA2DP_FIND_CBACK* p_cback) {
tSDP_UUID uuid_list;
bool result = true;
LOG_VERBOSE(LOG_TAG, "%s: uuid: 0x%x", __func__, service_uuid);
if ((service_uuid != UUID_SERVCLASS_AUDIO_SOURCE &&
service_uuid != UUID_SERVCLASS_AUDIO_SINK) ||
p_db == NULL || p_cback == NULL)
return A2DP_INVALID_PARAMS;
if (a2dp_cb.find.service_uuid == UUID_SERVCLASS_AUDIO_SOURCE ||
a2dp_cb.find.service_uuid == UUID_SERVCLASS_AUDIO_SINK)
return A2DP_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 = a2dp_attr_list;
p_db->num_attr = A2DP_NUM_ATTR;
}
if (a2dp_cb.find.p_db == NULL)
a2dp_cb.find.p_db = (tSDP_DISCOVERY_DB*)osi_malloc(p_db->db_len);
result = SDP_InitDiscoveryDb(a2dp_cb.find.p_db, p_db->db_len, 1, &uuid_list,
p_db->num_attr, p_db->p_attrs);
if (result == true) {
/* store service_uuid */
a2dp_cb.find.service_uuid = service_uuid;
a2dp_cb.find.p_cback = p_cback;
/* perform service search */
result = SDP_ServiceSearchAttributeRequest(bd_addr, a2dp_cb.find.p_db,
a2dp_sdp_cback);
if (false == result) {
a2dp_cb.find.service_uuid = 0;
}
}
return (result ? A2DP_SUCCESS : A2DP_FAIL);
}
/******************************************************************************
*
* Function A2DP_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 A2DP 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 A2DP_SetTraceLevel(uint8_t new_level) {
if (new_level != 0xFF) a2dp_cb.trace_level = new_level;
return (a2dp_cb.trace_level);
}
/******************************************************************************
* Function A2DP_BitsSet
*
* Description Check the given num for the number of bits set
* Returns A2DP_SET_ONE_BIT, if one and only one bit is set
* A2DP_SET_ZERO_BIT, if all bits clear
* A2DP_SET_MULTL_BIT, if multiple bits are set
*****************************************************************************/
uint8_t A2DP_BitsSet(uint64_t num) {
if (num == 0) return A2DP_SET_ZERO_BIT;
if ((num & (num - 1)) == 0) return A2DP_SET_ONE_BIT;
return A2DP_SET_MULTL_BIT;
}
/*******************************************************************************
*
* Function A2DP_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 A2DP_Init(void) {
memset(&a2dp_cb, 0, sizeof(tA2DP_CB));
a2dp_cb.avdt_sdp_ver = AVDT_VERSION;
#if defined(A2DP_INITIAL_TRACE_LEVEL)
a2dp_cb.trace_level = A2DP_INITIAL_TRACE_LEVEL;
#else
a2dp_cb.trace_level = BT_TRACE_LEVEL_NONE;
#endif
}
uint16_t A2DP_GetAvdtpVersion() { return a2dp_cb.avdt_sdp_ver; }