1 /*
2  * Copyright 2018 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #pragma once
18 
19 #include <set>
20 #include <vector>
21 
22 #include "vendor_packet.h"
23 
24 namespace bluetooth {
25 namespace avrcp {
26 
27 class GetElementAttributesRequest : public VendorPacket {
28  public:
29   virtual ~GetElementAttributesRequest() = default;
30 
31   /**
32    *  Register Notificaiton Request Packet Layout
33    *   AvrcpPacket:
34    *     CType c_type_;
35    *     uint8_t subunit_type_ : 5;
36    *     uint8_t subunit_id_ : 3;
37    *     Opcode opcode_;
38    *   VendorPacket:
39    *     uint8_t company_id[3];
40    *     uint8_t command_pdu;
41    *     uint8_t packet_type;
42    *     uint16_t param_length;
43    *   RegisterNotificationRequestPacket:
44    *     uint64_t identifier;
45    *     uint8_t number_of_attributes;
46    *     uint32_t attributes_requested[];
47    */
kMinSize()48   static constexpr size_t kMinSize() { return VendorPacket::kMinSize() + 9; }
49 
50   // Getter Functions
51   uint64_t GetIdentifier() const;
52   uint8_t GetNumAttributes() const;
53   std::vector<Attribute> GetAttributesRequested() const;
54 
55   // Overloaded Functions
56   virtual bool IsValid() const override;
57   virtual std::string ToString() const override;
58 
59  protected:
60   using VendorPacket::VendorPacket;
61 };
62 
63 template <class Builder>
64 class AttributesResponseBuilderTestUser;
65 
66 class GetElementAttributesResponseBuilder : public VendorPacketBuilder {
67  public:
68   virtual ~GetElementAttributesResponseBuilder() = default;
69   using Builder = std::unique_ptr<GetElementAttributesResponseBuilder>;
70   static Builder MakeBuilder(size_t mtu);
71 
72   size_t AddAttributeEntry(AttributeEntry entry);
73   size_t AddAttributeEntry(Attribute attribute, const std::string& value);
74 
clear()75   virtual void clear() { entries_.clear(); }
76 
kHeaderSize()77   static constexpr size_t kHeaderSize() { return VendorPacket::kMinSize() + 1; }
78 
79   virtual size_t size() const override;
80   virtual bool Serialize(
81       const std::shared_ptr<::bluetooth::Packet>& pkt) override;
82 
83  private:
84   std::set<AttributeEntry> entries_;
85   size_t mtu_;
86   friend class AttributesResponseBuilderTestUser<
87       GetElementAttributesResponseBuilder>;
88 
GetElementAttributesResponseBuilder(size_t mtu)89   GetElementAttributesResponseBuilder(size_t mtu)
90       : VendorPacketBuilder(CType::STABLE, CommandPdu::GET_ELEMENT_ATTRIBUTES,
91                             PacketType::SINGLE),
92         mtu_(mtu){};
93 };
94 
95 }  // namespace avrcp
96 }  // namespace bluetooth
97