/****************************************************************************** * * 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 #include "bt_target.h" #include "bt_common.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; osi_free_and_reset((void**)&a2d_cb.find.p_db); /* 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_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; } if(a2d_cb.find.p_db == NULL) a2d_cb.find.p_db = (tSDP_DISCOVERY_DB*)osi_malloc(p_db->db_len); result = SDP_InitDiscoveryDb(a2d_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 */ a2d_cb.find.service_uuid = service_uuid; a2d_cb.find.p_cback = p_cback; /* perform service search */ result = SDP_ServiceSearchAttributeRequest(bd_addr, a2d_cb.find.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 }