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 <iostream>
20 #include <vector>
21 
22 #include "packet/avrcp/avrcp_packet.h"
23 
24 // These classes are temporary placeholders to easily switch between BT_HDR and
25 // packets.
26 class VectorPacket : public ::bluetooth::Packet {
27  public:
28   using Packet::Packet;  // Inherit constructors
29 
Make()30   static std::shared_ptr<VectorPacket> Make() {
31     return std::shared_ptr<VectorPacket>(new VectorPacket());
32   };
33 
Make(std::vector<uint8_t> payload)34   static std::shared_ptr<VectorPacket> Make(std::vector<uint8_t> payload) {
35     auto pkt = VectorPacket::Make();
36     pkt->packet_start_index_ = 0;
37     pkt->packet_end_index_ = payload.size();
38     pkt->data_ = std::make_shared<std::vector<uint8_t>>(std::move(payload));
39     return pkt;
40   };
41 
GetData()42   const std::vector<uint8_t>& GetData() { return *data_; };
43 
ToString()44   virtual std::string ToString() const override {
45     std::stringstream ss;
46     ss << "VectorPacket:" << std::endl;
47     ss << "  └ Payload =";
48     for (auto it = begin(); it != end(); it++) {
49       ss << " " << loghex(*it);
50     }
51     ss << std::endl;
52 
53     return ss.str();
54   };
55 
GetPayloadIndecies()56   virtual std::pair<size_t, size_t> GetPayloadIndecies() const override {
57     return std::pair<size_t, size_t>(packet_start_index_, packet_end_index_);
58   }
59 
IsValid()60   virtual bool IsValid() const override { return true; }
61 };
62 
63 // TODO (apanicke): When deleting the old AVRCP Stack, remove this class and
64 // instead create a BT_HDR Parsing packet.
65 class AvrcpMessageConverter {
66  public:
Parse(tAVRC_MSG * m)67   static std::shared_ptr<::bluetooth::Packet> Parse(tAVRC_MSG* m) {
68     std::vector<uint8_t> data;
69 
70     switch (m->hdr.opcode) {
71       case AVRC_OP_VENDOR: {
72         tAVRC_MSG_VENDOR* msg = (tAVRC_MSG_VENDOR*)m;
73         data.push_back(m->hdr.ctype);
74         data.push_back((m->hdr.subunit_type << 3) | m->hdr.subunit_id);
75         data.push_back(m->hdr.opcode);
76         for (int i = 2; i >= 0; i--) {
77           data.push_back((uint8_t)((msg->company_id >> i * 8) & 0xff));
78         }
79         for (int i = 0; i < msg->vendor_len; i++) {
80           data.push_back(msg->p_vendor_data[i]);
81         }
82       } break;
83       case AVRC_OP_PASS_THRU: {
84         tAVRC_MSG_PASS* msg = (tAVRC_MSG_PASS*)m;
85         data.push_back(m->hdr.ctype);
86         data.push_back((m->hdr.subunit_type << 3) | m->hdr.subunit_id);
87         data.push_back(m->hdr.opcode);
88         data.push_back((msg->state << 7) | msg->op_id);
89         data.push_back(0x00);
90       } break;
91       case AVRC_OP_BROWSE: {
92         tAVRC_MSG_BROWSE* msg = (tAVRC_MSG_BROWSE*)m;
93         // The first 3 bytes are header bytes that aren't actually in AVRCP
94         // packets
95         for (int i = 0; i < msg->browse_len; i++) {
96           data.push_back(msg->p_browse_data[i]);
97         }
98       } break;
99       default:
100         LOG(ERROR) << "Unknown opcode for AVRCP message";
101         break;
102     }
103 
104     return VectorPacket::Make(data);
105   }
106 };
107