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 #include "capabilities_packet.h"
18
19 #include <bluetooth/log.h>
20
21 #include "internal_include/bt_trace.h"
22
23 namespace bluetooth {
24 namespace avrcp {
25
26 std::unique_ptr<GetCapabilitiesRequestBuilder>
MakeBuilder(Capability capability)27 GetCapabilitiesRequestBuilder::MakeBuilder(Capability capability) {
28 std::unique_ptr<GetCapabilitiesRequestBuilder> builder(
29 new GetCapabilitiesRequestBuilder(capability));
30
31 return builder;
32 }
33
size() const34 size_t GetCapabilitiesRequestBuilder::size() const {
35 return GetCapabilitiesRequest::kMinSize();
36 }
37
Serialize(const std::shared_ptr<::bluetooth::Packet> & pkt)38 bool GetCapabilitiesRequestBuilder::Serialize(
39 const std::shared_ptr<::bluetooth::Packet>& pkt) {
40 ReserveSpace(pkt, size());
41
42 // Push the standard avrcp headers
43 PacketBuilder::PushHeader(pkt);
44
45 // Push the avrcp vendor command headers, the parameter length is always 1
46 VendorPacketBuilder::PushHeader(pkt, 1);
47
48 // Push the capability
49 return AddPayloadOctets1(pkt, static_cast<uint8_t>(capability_));
50 }
51
GetCapabilityRequested() const52 Capability GetCapabilitiesRequest::GetCapabilityRequested() const {
53 auto value = *(begin() + VendorPacket::kMinSize());
54 return static_cast<Capability>(value);
55 }
56
IsValid() const57 bool GetCapabilitiesRequest::IsValid() const {
58 if (!VendorPacket::IsValid()) return false;
59 return (size() == VendorPacket::kMinSize() + 1);
60 }
61
ToString() const62 std::string GetCapabilitiesRequest::ToString() const {
63 std::stringstream ss;
64 ss << "AvrcpCapabilityReqPacket: " << std::endl;
65 ss << " └ cType = " << GetCType() << std::endl;
66 ss << " └ Subunit Type = " << loghex(GetSubunitType()) << std::endl;
67 ss << " └ Subunit ID = " << loghex(GetSubunitId()) << std::endl;
68 ss << " └ OpCode = " << GetOpcode() << std::endl;
69 ss << " └ Company ID = " << loghex(GetCompanyId()) << std::endl;
70 ss << " └ Command PDU = " << GetCommandPdu() << std::endl;
71 ss << " └ PacketType = " << GetPacketType() << std::endl;
72 ss << " └ Parameter Length = " << loghex(GetParameterLength()) << std::endl;
73 ss << " └ Capabilities Request = " << GetCapabilityRequested() << std::endl;
74 return ss.str();
75 }
76
77 std::unique_ptr<GetCapabilitiesResponseBuilder>
MakeCompanyIdBuilder(uint32_t company_id_element)78 GetCapabilitiesResponseBuilder::MakeCompanyIdBuilder(
79 uint32_t company_id_element) {
80 std::unique_ptr<GetCapabilitiesResponseBuilder> builder(
81 new GetCapabilitiesResponseBuilder(Capability::COMPANY_ID));
82
83 company_id_element &= 0x00FFFFFF;
84 builder->elements_.insert(company_id_element);
85
86 return builder;
87 }
88
89 std::unique_ptr<GetCapabilitiesResponseBuilder>
MakeEventsSupportedBuilder(Event event)90 GetCapabilitiesResponseBuilder::MakeEventsSupportedBuilder(Event event) {
91 std::unique_ptr<GetCapabilitiesResponseBuilder> builder(
92 new GetCapabilitiesResponseBuilder(Capability::EVENTS_SUPPORTED));
93
94 builder->elements_.insert(static_cast<uint8_t>(event));
95
96 return builder;
97 }
98
AddCompanyId(uint32_t company_id)99 GetCapabilitiesResponseBuilder* GetCapabilitiesResponseBuilder::AddCompanyId(
100 uint32_t company_id) {
101 log::assert_that(capability_ == Capability::COMPANY_ID,
102 "assert failed: capability_ == Capability::COMPANY_ID");
103 log::assert_that(elements_.size() < size_t(0xFF),
104 "maximum capability count reached");
105
106 company_id &= 0x00FFFFFF;
107 elements_.insert(company_id);
108
109 return this;
110 }
111
AddEvent(Event event)112 GetCapabilitiesResponseBuilder* GetCapabilitiesResponseBuilder::AddEvent(
113 Event event) {
114 log::assert_that(
115 capability_ == Capability::EVENTS_SUPPORTED,
116 "assert failed: capability_ == Capability::EVENTS_SUPPORTED");
117 log::assert_that(elements_.size() < size_t(0xFF),
118 "maximum capability count reached");
119
120 elements_.insert(static_cast<uint8_t>(event));
121
122 return this;
123 }
124
size() const125 size_t GetCapabilitiesResponseBuilder::size() const {
126 // Company ID's have a size of 3 while Events have a size of 1
127 size_t capability_count = elements_.size();
128 size_t capability_size = capability_ == Capability::COMPANY_ID ? 3 : 1;
129
130 return GetCapabilitiesResponse::kMinSize() +
131 (capability_count * capability_size);
132 }
133
Serialize(const std::shared_ptr<::bluetooth::Packet> & pkt)134 bool GetCapabilitiesResponseBuilder::Serialize(
135 const std::shared_ptr<::bluetooth::Packet>& pkt) {
136 ReserveSpace(pkt, size());
137
138 // Push the standard avrcp headers
139 PacketBuilder::PushHeader(pkt);
140
141 // Push the avrcp vendor command headers
142 uint16_t parameter_count = size() - VendorPacket::kMinSize();
143 VendorPacketBuilder::PushHeader(pkt, parameter_count);
144
145 // Push the capability, capability count, and elements
146 AddPayloadOctets1(pkt, static_cast<uint8_t>(capability_));
147 AddPayloadOctets1(pkt, elements_.size());
148 for (auto it = elements_.begin(); it != elements_.end(); it++) {
149 if (capability_ == Capability::COMPANY_ID)
150 PushCompanyId(pkt, *it);
151 else
152 AddPayloadOctets1(pkt, *it);
153 }
154
155 return true;
156 }
157
158 } // namespace avrcp
159 } // namespace bluetooth
160