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
MakeBuilder(Capability capability)26 std::unique_ptr<GetCapabilitiesRequestBuilder> GetCapabilitiesRequestBuilder::MakeBuilder(
27 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 { return GetCapabilitiesRequest::kMinSize(); }
35
Serialize(const std::shared_ptr<::bluetooth::Packet> & pkt)36 bool GetCapabilitiesRequestBuilder::Serialize(const std::shared_ptr<::bluetooth::Packet>& pkt) {
37 ReserveSpace(pkt, size());
38
39 // Push the standard avrcp headers
40 PacketBuilder::PushHeader(pkt);
41
42 // Push the avrcp vendor command headers, the parameter length is always 1
43 VendorPacketBuilder::PushHeader(pkt, 1);
44
45 // Push the capability
46 return AddPayloadOctets1(pkt, static_cast<uint8_t>(capability_));
47 }
48
GetCapabilityRequested() const49 Capability GetCapabilitiesRequest::GetCapabilityRequested() const {
50 auto value = *(begin() + VendorPacket::kMinSize());
51 return static_cast<Capability>(value);
52 }
53
IsValid() const54 bool GetCapabilitiesRequest::IsValid() const {
55 if (!VendorPacket::IsValid()) {
56 return false;
57 }
58 return size() == VendorPacket::kMinSize() + 1;
59 }
60
ToString() const61 std::string GetCapabilitiesRequest::ToString() const {
62 std::stringstream ss;
63 ss << "AvrcpCapabilityReqPacket: " << std::endl;
64 ss << " └ cType = " << GetCType() << std::endl;
65 ss << " └ Subunit Type = " << loghex(GetSubunitType()) << std::endl;
66 ss << " └ Subunit ID = " << loghex(GetSubunitId()) << std::endl;
67 ss << " └ OpCode = " << GetOpcode() << std::endl;
68 ss << " └ Company ID = " << loghex(GetCompanyId()) << std::endl;
69 ss << " └ Command PDU = " << GetCommandPdu() << std::endl;
70 ss << " └ PacketType = " << GetPacketType() << std::endl;
71 ss << " └ Parameter Length = " << loghex(GetParameterLength()) << std::endl;
72 ss << " └ Capabilities Request = " << GetCapabilityRequested() << std::endl;
73 return ss.str();
74 }
75
76 std::unique_ptr<GetCapabilitiesResponseBuilder>
MakeCompanyIdBuilder(uint32_t company_id_element)77 GetCapabilitiesResponseBuilder::MakeCompanyIdBuilder(uint32_t company_id_element) {
78 std::unique_ptr<GetCapabilitiesResponseBuilder> builder(
79 new GetCapabilitiesResponseBuilder(Capability::COMPANY_ID));
80
81 company_id_element &= 0x00FFFFFF;
82 builder->elements_.insert(company_id_element);
83
84 return builder;
85 }
86
87 std::unique_ptr<GetCapabilitiesResponseBuilder>
MakeEventsSupportedBuilder(Event event)88 GetCapabilitiesResponseBuilder::MakeEventsSupportedBuilder(Event event) {
89 std::unique_ptr<GetCapabilitiesResponseBuilder> builder(
90 new GetCapabilitiesResponseBuilder(Capability::EVENTS_SUPPORTED));
91
92 builder->elements_.insert(static_cast<uint8_t>(event));
93
94 return builder;
95 }
96
AddCompanyId(uint32_t company_id)97 GetCapabilitiesResponseBuilder* GetCapabilitiesResponseBuilder::AddCompanyId(uint32_t company_id) {
98 log::assert_that(capability_ == Capability::COMPANY_ID,
99 "assert failed: capability_ == Capability::COMPANY_ID");
100 log::assert_that(elements_.size() < size_t(0xFF), "maximum capability count reached");
101
102 company_id &= 0x00FFFFFF;
103 elements_.insert(company_id);
104
105 return this;
106 }
107
AddEvent(Event event)108 GetCapabilitiesResponseBuilder* GetCapabilitiesResponseBuilder::AddEvent(Event event) {
109 log::assert_that(capability_ == Capability::EVENTS_SUPPORTED,
110 "assert failed: capability_ == Capability::EVENTS_SUPPORTED");
111 log::assert_that(elements_.size() < size_t(0xFF), "maximum capability count reached");
112
113 elements_.insert(static_cast<uint8_t>(event));
114
115 return this;
116 }
117
size() const118 size_t GetCapabilitiesResponseBuilder::size() const {
119 // Company ID's have a size of 3 while Events have a size of 1
120 size_t capability_count = elements_.size();
121 size_t capability_size = capability_ == Capability::COMPANY_ID ? 3 : 1;
122
123 return GetCapabilitiesResponse::kMinSize() + (capability_count * capability_size);
124 }
125
Serialize(const std::shared_ptr<::bluetooth::Packet> & pkt)126 bool GetCapabilitiesResponseBuilder::Serialize(const std::shared_ptr<::bluetooth::Packet>& pkt) {
127 ReserveSpace(pkt, size());
128
129 // Push the standard avrcp headers
130 PacketBuilder::PushHeader(pkt);
131
132 // Push the avrcp vendor command headers
133 uint16_t parameter_count = size() - VendorPacket::kMinSize();
134 VendorPacketBuilder::PushHeader(pkt, parameter_count);
135
136 // Push the capability, capability count, and elements
137 AddPayloadOctets1(pkt, static_cast<uint8_t>(capability_));
138 AddPayloadOctets1(pkt, elements_.size());
139 for (auto it = elements_.begin(); it != elements_.end(); it++) {
140 if (capability_ == Capability::COMPANY_ID) {
141 PushCompanyId(pkt, *it);
142 } else {
143 AddPayloadOctets1(pkt, *it);
144 }
145 }
146
147 return true;
148 }
149
150 } // namespace avrcp
151 } // namespace bluetooth
152