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398 lines
14 KiB
398 lines
14 KiB
/******************************************************************************
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*
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* Copyright 2002-2012 Broadcom Corporation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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******************************************************************************/
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/******************************************************************************
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*
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* Common API for the Advanced Audio Distribution Profile (A2DP)
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*
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******************************************************************************/
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#define LOG_TAG "a2dp_api"
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#include "a2dp_api.h"
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#include <string.h>
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#include "a2dp_int.h"
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#include "avdt_api.h"
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#include "bt_common.h"
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#include "bt_target.h"
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#include "osi/include/log.h"
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#include "sdpdefs.h"
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using bluetooth::Uuid;
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/*****************************************************************************
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* Global data
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****************************************************************************/
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tA2DP_CB a2dp_cb;
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static uint16_t a2dp_attr_list[] = {
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ATTR_ID_SERVICE_CLASS_ID_LIST, /* update A2DP_NUM_ATTR, if changed */
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ATTR_ID_BT_PROFILE_DESC_LIST, ATTR_ID_SUPPORTED_FEATURES,
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ATTR_ID_SERVICE_NAME, ATTR_ID_PROTOCOL_DESC_LIST,
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ATTR_ID_PROVIDER_NAME};
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/******************************************************************************
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*
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* Function a2dp_sdp_cback
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*
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* Description This is the SDP callback function used by A2DP_FindService.
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* This function will be executed by SDP when the service
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* search is completed. If the search is successful, it
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* finds the first record in the database that matches the
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* UUID of the search. Then retrieves various parameters
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* from the record. When it is finished it calls the
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* application callback function.
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*
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* Returns Nothing.
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*
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*****************************************************************************/
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static void a2dp_sdp_cback(tSDP_STATUS status) {
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tSDP_DISC_REC* p_rec = NULL;
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tSDP_DISC_ATTR* p_attr;
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bool found = false;
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tA2DP_Service a2dp_svc;
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tSDP_PROTOCOL_ELEM elem;
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RawAddress peer_address = RawAddress::kEmpty;
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LOG_INFO("%s: status: %d", __func__, status);
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if (status == SDP_SUCCESS) {
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/* loop through all records we found */
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do {
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/* get next record; if none found, we're done */
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if ((p_rec = SDP_FindServiceInDb(
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a2dp_cb.find.p_db, a2dp_cb.find.service_uuid, p_rec)) == NULL) {
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break;
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}
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memset(&a2dp_svc, 0, sizeof(tA2DP_Service));
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peer_address = p_rec->remote_bd_addr;
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/* get service name */
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if ((p_attr = SDP_FindAttributeInRec(p_rec, ATTR_ID_SERVICE_NAME)) !=
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NULL) {
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a2dp_svc.p_service_name = (char*)p_attr->attr_value.v.array;
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a2dp_svc.service_len = SDP_DISC_ATTR_LEN(p_attr->attr_len_type);
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}
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/* get provider name */
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if ((p_attr = SDP_FindAttributeInRec(p_rec, ATTR_ID_PROVIDER_NAME)) !=
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NULL) {
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a2dp_svc.p_provider_name = (char*)p_attr->attr_value.v.array;
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a2dp_svc.provider_len = SDP_DISC_ATTR_LEN(p_attr->attr_len_type);
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}
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/* get supported features */
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if ((p_attr = SDP_FindAttributeInRec(
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p_rec, ATTR_ID_SUPPORTED_FEATURES)) != NULL) {
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a2dp_svc.features = p_attr->attr_value.v.u16;
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}
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/* get AVDTP version */
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if (SDP_FindProtocolListElemInRec(p_rec, UUID_PROTOCOL_AVDTP, &elem)) {
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a2dp_svc.avdt_version = elem.params[0];
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LOG_VERBOSE("avdt_version: 0x%x", a2dp_svc.avdt_version);
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}
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/* we've got everything, we're done */
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found = true;
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break;
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} while (true);
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}
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a2dp_cb.find.service_uuid = 0;
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osi_free_and_reset((void**)&a2dp_cb.find.p_db);
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/* return info from sdp record in app callback function */
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if (a2dp_cb.find.p_cback != NULL) {
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(*a2dp_cb.find.p_cback)(found, &a2dp_svc, peer_address);
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}
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return;
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}
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/*******************************************************************************
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*
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* Function a2dp_set_avdt_sdp_ver
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*
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* Description This function allows the script wrapper to change the
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* avdt version of a2dp.
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*
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* Returns None
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*
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******************************************************************************/
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void a2dp_set_avdt_sdp_ver(uint16_t avdt_sdp_ver) {
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a2dp_cb.avdt_sdp_ver = avdt_sdp_ver;
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}
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/******************************************************************************
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*
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* Function A2DP_AddRecord
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*
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* Description This function is called by a server application to add
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* SRC or SNK information to an SDP record. Prior to
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* calling this function the application must call
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* SDP_CreateRecord() to create an SDP record.
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*
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* Input Parameters:
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* service_uuid: Indicates SRC or SNK.
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*
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* p_service_name: Pointer to a null-terminated character
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* string containing the service name.
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*
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* p_provider_name: Pointer to a null-terminated character
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* string containing the provider name.
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*
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* features: Profile supported features.
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*
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* sdp_handle: SDP handle returned by SDP_CreateRecord().
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*
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* Output Parameters:
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* None.
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*
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* Returns A2DP_SUCCESS if function execution succeeded,
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* A2DP_INVALID_PARAMS if bad parameters are given.
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* A2DP_FAIL if function execution failed.
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*
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*****************************************************************************/
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tA2DP_STATUS A2DP_AddRecord(uint16_t service_uuid, char* p_service_name,
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char* p_provider_name, uint16_t features,
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uint32_t sdp_handle) {
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uint16_t browse_list[1];
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bool result = true;
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uint8_t temp[8];
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uint8_t* p;
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tSDP_PROTOCOL_ELEM proto_list[A2DP_NUM_PROTO_ELEMS];
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LOG_VERBOSE("%s: uuid: 0x%x", __func__, service_uuid);
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if ((sdp_handle == 0) || (service_uuid != UUID_SERVCLASS_AUDIO_SOURCE &&
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service_uuid != UUID_SERVCLASS_AUDIO_SINK))
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return A2DP_INVALID_PARAMS;
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/* add service class id list */
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result &= SDP_AddServiceClassIdList(sdp_handle, 1, &service_uuid);
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memset((void*)proto_list, 0,
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A2DP_NUM_PROTO_ELEMS * sizeof(tSDP_PROTOCOL_ELEM));
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/* add protocol descriptor list */
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proto_list[0].protocol_uuid = UUID_PROTOCOL_L2CAP;
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proto_list[0].num_params = 1;
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proto_list[0].params[0] = AVDT_PSM;
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proto_list[1].protocol_uuid = UUID_PROTOCOL_AVDTP;
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proto_list[1].num_params = 1;
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proto_list[1].params[0] = a2dp_cb.avdt_sdp_ver;
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result &= SDP_AddProtocolList(sdp_handle, A2DP_NUM_PROTO_ELEMS, proto_list);
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/* add profile descriptor list */
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result &= SDP_AddProfileDescriptorList(
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sdp_handle, UUID_SERVCLASS_ADV_AUDIO_DISTRIBUTION, A2DP_VERSION);
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/* add supported feature */
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if (features != 0) {
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p = temp;
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UINT16_TO_BE_STREAM(p, features);
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result &= SDP_AddAttribute(sdp_handle, ATTR_ID_SUPPORTED_FEATURES,
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UINT_DESC_TYPE, (uint32_t)2, (uint8_t*)temp);
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}
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/* add provider name */
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if (p_provider_name != NULL) {
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result &= SDP_AddAttribute(
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sdp_handle, ATTR_ID_PROVIDER_NAME, TEXT_STR_DESC_TYPE,
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(uint32_t)(strlen(p_provider_name) + 1), (uint8_t*)p_provider_name);
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}
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/* add service name */
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if (p_service_name != NULL) {
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result &= SDP_AddAttribute(
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sdp_handle, ATTR_ID_SERVICE_NAME, TEXT_STR_DESC_TYPE,
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(uint32_t)(strlen(p_service_name) + 1), (uint8_t*)p_service_name);
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}
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/* add browse group list */
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browse_list[0] = UUID_SERVCLASS_PUBLIC_BROWSE_GROUP;
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result &= SDP_AddUuidSequence(sdp_handle, ATTR_ID_BROWSE_GROUP_LIST, 1,
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browse_list);
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return (result ? A2DP_SUCCESS : A2DP_FAIL);
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}
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/******************************************************************************
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*
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* Function A2DP_FindService
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*
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* Description This function is called by a client application to
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* perform service discovery and retrieve SRC or SNK SDP
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* record information from a server. Information is
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* returned for the first service record found on the
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* server that matches the service UUID. The callback
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* function will be executed when service discovery is
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* complete. There can only be one outstanding call to
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* A2DP_FindService() at a time; the application must wait
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* for the callback before it makes another call to
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* the function.
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*
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* Input Parameters:
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* service_uuid: Indicates SRC or SNK.
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*
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* bd_addr: BD address of the peer device.
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*
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* p_db: Pointer to the information to initialize
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* the discovery database.
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*
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* p_cback: Pointer to the A2DP_FindService()
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* callback function.
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*
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* Output Parameters:
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* None.
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*
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* Returns A2DP_SUCCESS if function execution succeeded,
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* A2DP_INVALID_PARAMS if bad parameters are given.
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* A2DP_BUSY if discovery is already in progress.
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* A2DP_FAIL if function execution failed.
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*
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*****************************************************************************/
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tA2DP_STATUS A2DP_FindService(uint16_t service_uuid, const RawAddress& bd_addr,
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tA2DP_SDP_DB_PARAMS* p_db,
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tA2DP_FIND_CBACK* p_cback) {
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bool result = true;
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LOG_INFO("%s: peer: %s UUID: 0x%x", __func__, bd_addr.ToString().c_str(),
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service_uuid);
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if ((service_uuid != UUID_SERVCLASS_AUDIO_SOURCE &&
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service_uuid != UUID_SERVCLASS_AUDIO_SINK) ||
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p_db == NULL || p_cback == NULL) {
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LOG_ERROR(
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"%s: cannot find service for peer %s UUID 0x%x: "
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"invalid parameters",
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__func__, bd_addr.ToString().c_str(), service_uuid);
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return A2DP_INVALID_PARAMS;
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}
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if (a2dp_cb.find.service_uuid == UUID_SERVCLASS_AUDIO_SOURCE ||
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a2dp_cb.find.service_uuid == UUID_SERVCLASS_AUDIO_SINK) {
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LOG_ERROR("%s: cannot find service for peer %s UUID 0x%x: busy", __func__,
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bd_addr.ToString().c_str(), service_uuid);
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return A2DP_BUSY;
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}
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if (p_db->p_attrs == NULL || p_db->num_attr == 0) {
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p_db->p_attrs = a2dp_attr_list;
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p_db->num_attr = A2DP_NUM_ATTR;
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}
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if (a2dp_cb.find.p_db == NULL)
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a2dp_cb.find.p_db = (tSDP_DISCOVERY_DB*)osi_malloc(p_db->db_len);
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Uuid uuid_list = Uuid::From16Bit(service_uuid);
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result = SDP_InitDiscoveryDb(a2dp_cb.find.p_db, p_db->db_len, 1, &uuid_list,
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p_db->num_attr, p_db->p_attrs);
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if (result) {
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/* store service_uuid */
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a2dp_cb.find.service_uuid = service_uuid;
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a2dp_cb.find.p_cback = p_cback;
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/* perform service search */
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result = SDP_ServiceSearchAttributeRequest(bd_addr, a2dp_cb.find.p_db,
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a2dp_sdp_cback);
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if (!result) {
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a2dp_cb.find.service_uuid = 0;
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}
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}
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if (!result) {
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LOG_ERROR(
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"%s: cannot find service for peer %s UUID 0x%x: "
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"SDP error",
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__func__, bd_addr.ToString().c_str(), service_uuid);
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return A2DP_FAIL;
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}
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return A2DP_SUCCESS;
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}
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/******************************************************************************
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*
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* Function A2DP_SetTraceLevel
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*
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* Description Sets the trace level for A2D. If 0xff is passed, the
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* current trace level is returned.
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*
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* Input Parameters:
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* new_level: The level to set the A2DP tracing to:
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* 0xff-returns the current setting.
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* 0-turns off tracing.
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* >= 1-Errors.
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* >= 2-Warnings.
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* >= 3-APIs.
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* >= 4-Events.
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* >= 5-Debug.
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*
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* Returns The new trace level or current trace level if
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* the input parameter is 0xff.
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*
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*****************************************************************************/
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uint8_t A2DP_SetTraceLevel(uint8_t new_level) {
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if (new_level != 0xFF) a2dp_cb.trace_level = new_level;
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return (a2dp_cb.trace_level);
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}
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/******************************************************************************
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* Function A2DP_BitsSet
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*
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* Description Check the given num for the number of bits set
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* Returns A2DP_SET_ONE_BIT, if one and only one bit is set
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* A2DP_SET_ZERO_BIT, if all bits clear
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* A2DP_SET_MULTL_BIT, if multiple bits are set
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*****************************************************************************/
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uint8_t A2DP_BitsSet(uint64_t num) {
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if (num == 0) return A2DP_SET_ZERO_BIT;
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if ((num & (num - 1)) == 0) return A2DP_SET_ONE_BIT;
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return A2DP_SET_MULTL_BIT;
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}
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/*******************************************************************************
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*
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* Function A2DP_Init
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*
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* Description This function is called to initialize the control block
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* for this layer. It must be called before accessing any
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* other API functions for this layer. It is typically called
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* once during the start up of the stack.
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*
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* Returns void
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*
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******************************************************************************/
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void A2DP_Init(void) {
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memset(&a2dp_cb, 0, sizeof(tA2DP_CB));
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a2dp_cb.avdt_sdp_ver = AVDT_VERSION;
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#if defined(A2DP_INITIAL_TRACE_LEVEL)
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a2dp_cb.trace_level = A2DP_INITIAL_TRACE_LEVEL;
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#else
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a2dp_cb.trace_level = BT_TRACE_LEVEL_NONE;
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#endif
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}
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uint16_t A2DP_GetAvdtpVersion() { return a2dp_cb.avdt_sdp_ver; }
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