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 
21 #include "vendor_packet.h"
22 
23 namespace bluetooth {
24 namespace avrcp {
25 
26 class GetCapabilitiesRequestBuilder : public VendorPacketBuilder {
27 public:
28   virtual ~GetCapabilitiesRequestBuilder() = default;
29 
30   static std::unique_ptr<GetCapabilitiesRequestBuilder> MakeBuilder(Capability capability);
31 
32   virtual size_t size() const override;
33   virtual bool Serialize(const std::shared_ptr<::bluetooth::Packet>& pkt) override;
34 
35 protected:
36   Capability capability_;
37 
GetCapabilitiesRequestBuilder(Capability capability)38   GetCapabilitiesRequestBuilder(Capability capability)
39       : VendorPacketBuilder(CType::STATUS, CommandPdu::GET_CAPABILITIES, PacketType::SINGLE),
40         capability_(capability) {}
41 };
42 
43 class GetCapabilitiesRequest : public VendorPacket {
44 public:
45   virtual ~GetCapabilitiesRequest() = default;
46 
47   /**
48    *  Get Capabilities Response Packet Layout
49    *   AvrcpPacket:
50    *     CType c_type_;
51    *     uint8_t subunit_type_ : 5;
52    *     uint8_t subunit_id_ : 3;
53    *     Opcode opcode_;
54    *   VendorPacket:
55    *     uint8_t company_id[3];
56    *     uint8_t command_pdu;
57    *     uint8_t packet_type;
58    *     uint16_t param_length;
59    *   GetCapabilitiesRequestPacket:
60    *     uint8_t capability_requested:
61    */
kMinSize()62   static constexpr size_t kMinSize() { return VendorPacket::kMinSize() + 1; }
63 
64   // Getter Functions
65   Capability GetCapabilityRequested() const;
66 
67   // Overloaded Functions
68   virtual bool IsValid() const override;
69   virtual std::string ToString() const override;
70 
71 protected:
72   using VendorPacket::VendorPacket;
73 };
74 
75 class GetCapabilitiesResponseBuilder : public VendorPacketBuilder {
76 public:
77   virtual ~GetCapabilitiesResponseBuilder() = default;
78 
79   static std::unique_ptr<GetCapabilitiesResponseBuilder> MakeCompanyIdBuilder(
80           uint32_t company_id_element);
81 
82   static std::unique_ptr<GetCapabilitiesResponseBuilder> MakeEventsSupportedBuilder(Event event);
83 
84   GetCapabilitiesResponseBuilder* AddCompanyId(uint32_t company_id);
85   GetCapabilitiesResponseBuilder* AddEvent(Event event);
86 
87   virtual size_t size() const override;
88   virtual bool Serialize(const std::shared_ptr<::bluetooth::Packet>& pkt) override;
89 
90 private:
91   Capability capability_;
92   std::set<uint32_t> elements_;
93 
GetCapabilitiesResponseBuilder(Capability capability)94   GetCapabilitiesResponseBuilder(Capability capability)
95       : VendorPacketBuilder(CType::STABLE, CommandPdu::GET_CAPABILITIES, PacketType::SINGLE),
96         capability_(capability) {}
97 };
98 
99 class GetCapabilitiesResponse : public VendorPacket {
100 public:
101   /**
102    * Get Capabilities Response Packet Layout
103    *   AvrcpPacket:
104    *     CType c_type_;
105    *     uint8_t subunit_type_ : 5;
106    *     uint8_t subunit_id_ : 3;
107    *     Opcode opcode_;
108    *   VendorPacket:
109    *     uint8_t company_id[3];
110    *     uint8_t command_pdu;
111    *     uint8_t packet_type;
112    *     uint16_t param_length;
113    *   GetCapabilitiesRequestPacket;
114    *     uint8_t capability_requested;
115    *     uint16_t capability_count;
116    *     union {
117    *        uint8_t event_supported;
118    *        uint8_t company_id[3];
119    *     } capability_array[];
120    */
kMinSize()121   static constexpr size_t kMinSize() { return VendorPacket::kMinSize() + 2; }
122 
123   // TODO: Implement these for AVRCP Controller
124   // virtual uint8_t GetCapabilityReturned() const;
125   // virtual uint8_t GetCapabilityCount() const;
126   // virtual std::vector<Event> GetEventsSupported() const;
127   // virtual std::vector<uint32_t> GetCompanyIds() const;
128 
129   virtual std::string ToString() const override;
130 };
131 
132 }  // namespace avrcp
133 }  // namespace bluetooth
134